CN110388496A - Ball valve - Google Patents

Abstract

The invention discloses a ball valve, comprising a driving mechanism, a transmission mechanism, a valve body assembly and a valve core. The driving mechanism includes a motor assembly, a sleeve and a connecting seat, the motor assembly includes a motor shaft, and the transmission mechanism includes a planetary gear assembly and valve stem, the motor shaft is drivingly connected with the planetary gear assembly, one end of the valve stem is fixedly connected with the planetary gear assembly, the other end of the valve stem is drivingly connected with the valve core, the The valve body assembly includes a main valve body and a gear box, the gear box is formed with a second cavity, one end of the gear box is fixedly connected with the connecting seat, the gear box and the connecting seat are sealed and arranged, so The other end of the gear box is fixed with the main valve body and the connection is sealed, a part of the valve stem is located in the gear box, and a part is located in the main valve body; the ball valve can be relatively reduced in volume, and in use It can make the valve stem not exposed to the ball valve, which can be suitable for high sealing performance requirements.

Description

Ball valve

【Technical field】

The invention relates to the technical field of fluid control, in particular to a ball valve.

【Background technique】

The ball valve is mainly used to cut off the fluid in the pipeline. At present, the ball valve is generally divided into a driving mechanism, a transmission mechanism and a valve body. The driving mechanism drives the valve core in the valve body to rotate through the rotation of the valve stem to switch the fluid flow. Orientation function. A gear reduction mechanism is arranged in the transmission mechanism, and the output torque of the motor is amplified by a multi-stage externally meshed gear group. However, the multi-stage externally meshing gear set takes up a relatively large space. In addition, the transmission mechanism and the valve core are connected by the valve stem, and the transmission mechanism is located outside the valve body. Since a part of the valve stem extends out of the valve body and is connected to the transmission mechanism, it is generally sealed by setting a rubber O-ring on the valve stem. In order to prevent external Leakage, the requirements for the O-ring are higher.

[Content of the invention]

In order to solve the deficiencies of the above ball valve, the present invention provides a ball valve, which includes a drive mechanism, a transmission mechanism, a valve body assembly and a valve core, the drive mechanism includes a motor assembly, a sleeve and a connecting seat, and the motor assembly includes a motor shaft, The transmission mechanism includes a planetary gear assembly and a valve rod, the motor shaft is in driving connection with the planetary gear assembly, one end of the valve rod is fixedly connected with the planetary gear assembly, and the other end of the valve rod is connected with the The valve core is connected by transmission, the valve body assembly includes a main valve body and a gear box, the gear box is formed with a second cavity, one end of the gear box is fixedly connected with the connecting seat, and the gear box is connected with the connection Sealing arrangement between the seats, the other end of the gear box is fixed with the main valve body and the connection is sealed, a part of the valve stem is located in the gear box, and a part is located in the main valve body;

The ball valve also includes a main valve body cavity, a first channel, a second channel and a third channel, the valve core is accommodated in the main valve body cavity, the valve core is provided with a flow channel, and the valve core is controlled by controlling the valve core. action, the third channel can selectively communicate with the first channel or the second channel through the flow channel.

The planetary gear assembly is at least partially installed in the second cavity, the planetary gear assembly includes a planetary gear assembly and a limit column, the limit column is fixed or integrated with the main valve body, and the planetary wheel assembly includes A limit portion, a first gear ring and a second gear ring that cooperate with the limit column, the limit portion is arranged on the side of the second gear ring facing the valve core, and at least a portion of the limit column is provided. A part extends into the limiting portion, the second ring gear is fixed or integrated with the valve stem, and when the limiting column abuts on the inner wall of one end of the limiting portion, the planetary gear set stops rotating .

The limiting portion includes two arc-shaped holes, the limiting column passes through the arc-shaped holes, and the inner wall of the arc-shaped hole is slidably fitted with the limiting column; or the limiting portion includes Two arc-shaped grooves, the arc-shaped grooves slidingly cooperate with the limiting column.

There are two limit posts, and the two limit posts are symmetrically distributed with the center of the second gear ring as the center, and the two limit parts are symmetrically distributed with the center of the second gear ring as the center and are 90 ° arc angle setting.

The main valve body further includes a first opening part and a second opening part, the valve stem extends into the main valve body cavity through the first opening part, and a valve cover is arranged on the second opening part, and a part of the valve cover is arranged at the second opening part. the second passage is located at the main valve body, and a part of the second passage is located at the valve cover;

The valve cover includes a large-diameter portion and a small-diameter portion. The small-diameter portion is provided with an annular groove at one end away from the large-diameter portion. sealing between the large diameter portion of the cover and the inner wall of the second opening;

The port of the first channel located on the outer wall of the main valve body and the port of the second channel located on the outer wall of the main valve body are located on the same side outer wall of the main valve body.

A first valve seat and a second valve seat are arranged in the main valve body, the valve core is arranged between the first valve seat and the second valve seat, and the valve core is slidably fitted with the first valve seat , the valve core is slidingly matched with the second valve seat, the first valve seat is arranged between the first channel and the valve core, and the second valve seat is arranged between the second channel and the valve core. between the valve cores, and the first valve seat is arranged on the valve cover.

The sleeve includes a tubular body and an upper cover plate, the upper cover plate includes a matching portion matched with the tubular body, the tubular body and the upper cover plate are sealed and fixed at the matching portion, and the upper cover The plate further includes an annular protrusion facing the inside of the sleeve, one end of the motor shaft is limited to the annular protrusion, and the tubular body is fixed or integrated with the upper cover plate.

A communication hole is also provided on the end surface of the end of the main valve body that is matched with the gear box, one end of the communication hole is communicated with the main valve body cavity, and the other end of the communication hole is connected to the second The cavities are communicated with each other, and the second cavity is communicated with the main valve body cavity through the communication hole.

The flow channel includes a first channel and a second channel, one end of the first channel is located on the outer wall of the valve core, the other end of the first channel is communicated with the second channel, the second channel One end of the hole is located on the outer wall of the valve core, the other end of the second hole is communicated with the first hole, and the connection between the first hole and the second hole is located in the center of the valve core Or near the center; projected in the direction perpendicular to the first and second channels, the angle formed between the projections of the first and second channels is 45° to 135°.

The flow channel includes a first channel, a second channel and a third channel, one end of the first channel is located on the outer wall of the valve core, and the other end of the first channel is connected to the second channel and the third channel. The holes are communicated, one end of the second hole is located on the outer wall of the valve core, the other end of the second hole is communicated with the first hole and the third hole, and one end of the third hole is located at the outer wall of the valve core. The outer wall of the valve core, the other end of the third hole communicates with the first hole and the second hole, and the connection of the first hole, the second hole and the third hole is at the valve core. At or near the center, the first channel and the third channel are coaxially arranged.

By using the planetary wheel assembly as the transmission device, the ball valve of the present invention has a relatively compact structure and can be relatively reduced in volume, and can keep the valve stem from being exposed to the outside of the ball valve during use, and can be suitable for high sealing performance requirements.

Description of drawings

1 is a schematic cross-sectional view of a ball valve according to an embodiment of the present invention;

Fig. 2 is a three-dimensional schematic view of the ball valve shown in Fig. 1;

Fig. 3 is the three-dimensional schematic diagram of the planetary gear set in the ball valve shown in Fig. 1;

FIG. 4 is a schematic top view of the planetary wheel assembly in the ball valve shown in FIG. 1;

5 is a schematic structural diagram of the cooperation between the second ring gear and the limit post in the gear set;

Figure 6 is a schematic cross-sectional view of the planetary gear assembly;

Figure 7 is a three-dimensional schematic diagram of the valve core;

Figure 8 is a schematic sectional view of the valve core;

Figure 9 is a schematic perspective view of the planetary gear assembly;

Figure 10 is a schematic diagram of the first working state of the ball valve;

Figure 11 is a schematic diagram of the second working state of the ball valve;

Figure 12 is a schematic diagram of the position of the valve core when the groove channel acts as a pressure relief;

Figure 13 is a schematic diagram of the partial marking of the ball valve;

14 is a schematic cross-sectional view of a valve core of another embodiment;

Figure 15 is a schematic diagram of the position of the valve core when the groove channel shown in Figure 14 acts as a pressure relief;

16 is a schematic cross-sectional view of a valve core in a ball valve according to another embodiment;

Fig. 17 is a schematic diagram of the first working state of the ball valve of the embodiment of Fig. 16;

Fig. 18 is a schematic diagram of the third working state of the ball valve of the embodiment of Fig. 16;

Fig. 19 is a schematic diagram of the second working state of the ball valve of the embodiment of Fig. 16;

Fig. 20 is a schematic diagram of the core position when the groove passage of the ball valve in the embodiment of Fig. 16 acts as a pressure relief;

Fig. 21 is a schematic diagram of another position of the valve core when the groove passage of the ball valve in the embodiment of Fig. 16 acts as a pressure relief;

FIG. 22 is a schematic cross-sectional view of a valve core in a ball valve according to still another embodiment.

The symbols in the figure represent in turn: 1. Sun gear, 2. Planetary gear, 3. First ring gear, 4. Second ring gear 5. Stator coil, 6. Motor shaft, 7. Rotor, 8. Sleeve, 9 . Upper cover plate, 10. Drive mechanism, 11. Transmission mechanism, 12. Valve body assembly, 13. Card slot, 14. Connection seat, 15. Arc groove, 16. Gear box, 17. Second opening, 18. Gasket, 19. Stem, 20. Sealing ring, 22. First valve seat, 23. Bonnet, 24. Main valve body, 25/25'. Valve core, 26. Connecting hole, 27. Planetary gear assembly, 28. first mounting plate, 29. second mounting plate, 30. gear shaft, 31. limit post, 32. arc hole, 33. first opening, 34. first channel, 35. second channel, 36. third channel, 37. second valve seat, 38/38'. first groove part, 39/39'. second groove part, 40. motor assembly, 41/41'. flow channel, 43. The third groove part, 45. The fourth groove part, 50. The planetary gear set, 51/51'. The first channel, 52/52'. The second channel, 53. The third channel, 54/54' .First notch, 55/55'. Second notch, 56. Third notch, 57. Fourth notch, 111. Second cavity, 121. Main valve body cavity, 231. Annular groove, 232. Small diameter part, 233. Large diameter part, 321. End inner wall, 411/411'. First port port, 412/412'. Second port port, 413. Third port port, 801. First cavity , a. The first arc, b. The second arc, c. The third arc, d. The fourth arc, e. The fifth arc.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

An embodiment of the present invention is shown in FIGS. 1 to 13 . The ball valve of this embodiment includes a driving mechanism 10 , a transmission mechanism 11 , a valve body assembly 12 and a valve core 25 . The drive mechanism 10 includes a motor assembly 40, a sleeve 8, and a connection seat 14. The motor assembly 40 includes a stator coil 5, a motor shaft 6 and a rotor 7. The stator coil 5 is sleeved on the sleeve 8, and the rotor 7 is built in the sleeve 8. The motor The shaft 6 is fixedly connected with the rotor 7, and the rotation of the rotor 7 drives the motor shaft 6 to rotate. The connection seat 14 is provided between the sleeve 8 and the gear box 16 , and at least a part of the motor shaft 6 passes through the connection seat 14 .

One end of the connection seat 14 includes a step portion matched with the sleeve 8 , and the sleeve 8 and the connection seat 14 are sealed and fixed at the step portion by welding or the like. The sleeve 8 includes a tubular body and an upper cover plate 9. The upper cover plate 9 includes a matching portion that cooperates with the tubular body. The tubular body and the upper cover plate 9 are sealed and fixed at the matching portion. It should be pointed out here that the tubular body and the upper cover plate 9 can be one structure. The upper cover plate 9 also includes an annular protrusion located near its center towards the inside of the sleeve 8 . One end of the motor shaft 6 is limited to the annular protrusion. By arranging the annular protrusion, the rotation stability of the motor shaft 6 can be improved, and the wear and tear can be reduced.

The ball valve also includes a first cavity 801. It should be noted here that the first cavity 801 is formed in the sleeve 8, or the first cavity 801 is formed between a part of the connecting seat 14 and a part of the sleeve 8, or the first cavity 801 is Other forms are formed between the connection seat 14 and the sleeve 8 ; the rotor 7 is located in the first cavity 801 , and at least a part of the motor shaft 6 is located in the first cavity 801 . By sealing and fixing the sleeve 8 and the upper cover 9 at the matching position, the first cavity 801 can be prevented from communicating with the outside at the matching position of the sleeve 8 and the upper cover 9, and the sealing performance can be relatively improved.

The valve body assembly 12 includes a gear box 16 and a main valve body 24. The ball valve is formed with a second cavity 111 in the gear box 16. It should be noted here that the second cavity 111 is formed in a part of the connecting seat 14, a part of the gear box 16 and the main valve body. A part of the valve body 24 , or the second cavity 111 is formed between the connecting seat 14 , the gear box 16 and the main valve body 24 in other forms. One end of the gear box 16 has a stepped portion that is matched with one end of the connecting seat 14 . The stepped portion is formed with a stepped hole to communicate with the second cavity 111 . The stepped portion and one end of the connecting seat 14 can be screwed together. The connecting seat 14 and the stepped portion A gasket 18 may also be provided between to achieve sealing. One end of the gear box 16 is fixedly connected to the connecting seat, and the other end of the gear box 16 is fixed to the main valve body 24, and is sealed at the fixed part of the gear box and the main valve body, for example, by welding, so that the gear box and the main valve body are connected to each other. Fixed, and can achieve sealing at the fixed position, of course, can also be fixed by other forms such as screw connection.

The transmission mechanism 11 includes a planetary gear assembly 27 and a valve stem 19 , and the planetary gear assembly 27 is at least partially located in the second cavity 111 . The planetary gear assembly 27 includes a planetary gear set 50 and a limiting column 31. The planetary gear set 50 includes a sun gear 1, a plurality of planetary gears 2, a first ring gear 3, a second ring gear 4, a first mounting plate 28, a second Mounting plate 29, gear shaft 30. At least part of the part of the motor shaft 6 passing through the connecting seat 14 is connected to the planetary gear assembly 27 in the gear box 16 in a driving manner. It should be noted here that the motor shaft 6 and the sun gear 1 can be connected by interference crimping or snap-fit. When the motor shaft 6 rotates, the sun gear 1 rotates synchronously, thereby driving the planetary gear assembly 27 to rotate. In this embodiment, the number of the planetary gears 2 is three, the first mounting plate 28 and the second mounting plate 29 can be annular structures, and the circular through hole in the middle is convenient for the cooperation between the motor shaft 6 and the sun gear 1, and the three planetary gears The wheel 2 is rotatably arranged between the first mounting plate 28 and the second mounting plate 29 through a gear shaft 30 .

The three planetary gears 2 are meshed with the sun gear 1, the first ring gear 3 and the second ring gear 4 both have internal gears, and one end of the planetary gear 2 is in the internal gear of the first ring gear 3 and the first ring gear. 3. Meshing connection, the other end of the planetary gear 2 is meshingly connected with the second ring gear 4 at the inner tooth portion of the second ring gear 4. The first ring gear 3 is fixedly connected to the gear box 16 on the side away from the planetary gear 2 , and is installed on the gear box 16 by means of interference fit or limit fit, for example.

The second ring gear 4 includes a limiting portion. The limiting portion is disposed on the side of the second ring gear 4 facing the valve core 25 . The limiting portion includes two arc-shaped holes 32 . The two arc-shaped holes 32 are defined by the second tooth The center of circle 4 is distributed symmetrically around the center. The main valve body 24 is provided with a limiting column matched with the limiting portion, and the two limiting columns 31 are also symmetrically distributed around the center of the second ring gear 4 . The limiting column 31 may be fixed with the main valve body 24 by welding or the like, or the limiting column 31 and the main valve body 24 may also be integrally formed. The limit post 31 passes through the arc-shaped hole 32, and is limited by cooperating with the inner wall of the arc-shaped hole 32. The two ends of the arc-shaped hole 32 can limit the rotation range of the planetary gear set 50, and the second ring gear 4 is clockwise. During rotation, when the inner wall 321 of one end of the arc-shaped hole 32 is in contact with the limit post 31, the second ring gear 4 stops rotating in the clockwise direction. The arc angle can limit the rotation range of the planetary gear set. In this embodiment, the arc angle of the arc-shaped hole 32 is set to 90°. It should be known here that the arc angle can be set adaptively in different working environments.

One end of the second ring gear 4 and the valve stem 19 can be fixedly connected by in-mold injection, and the valve stem 19 and the second ring gear 4 rotate together. It should be noted here that the second ring gear 4 can also be made of a metal material, the second ring gear 4 has a center hole, the valve stem 19 and the center hole can be crimped by interference or the center hole can be arranged in a different shape, corresponding to the shape of the valve stem Rotational driving is achieved in cooperation with each other. This transmission mechanism is relatively compact in structure and small in volume, thereby reducing the volume of the ball valve.

Its working principle is: when the motor shaft 6 rotates clockwise, it drives the sun gear 1 to rotate clockwise, and drives the planetary gear 2 to rotate through the meshing connection, the first ring gear 3 is fixed, and the planetary gear 2 rotates around its own axis. , the sun gear 1 is also rotated in the circumferential direction, that is, the motor shaft 6 is rotated as the center, thereby driving the second ring gear 4 to rotate, while the valve stem 19 and the second ring gear 4 rotate together, and the rotation angle is from 0° to 90° , when the inner wall of one end of the arc-shaped hole 32 is in contact with the limiting column, the second ring gear stops rotating in the direction of its rotation, and the same is true when the motor shaft 6 rotates counterclockwise, which will not be repeated here.

It should be noted here that, as shown in FIG. 9 , the limiting method of the planetary gear set can also be limited by sliding fit between the arc-shaped groove 15 of the second ring gear 4 and the limiting column 31 . When the inner wall of one end portion is in contact with the limiting post 31, the planetary gear set 50 stops rotating. This limiting method reduces the length of the limiting column and makes the structure of the planetary gear assembly more compact.

The upper end of the main valve body 24 is provided with a first opening 33, and the right side is provided with a second opening 17 (FIG. 1 and FIG. 2). The ball valve is provided with a valve cover 23 at the position where the second opening 17 is located. The second opening portion 17 is sealed and fixed. A main valve body cavity 121 is formed in the main valve body 24. It should be noted here that the main valve body cavity 121 is formed between a part of the second opening part 17 and a part of the valve cover 23, or the main valve body cavity 121 is formed in the first valve body in other forms. between the two openings 17 and the valve cover 23 . One end of the valve rod 19 is fixedly connected with the second ring gear 4 , and the other end extends into the main valve body cavity 121 of the main valve body 24 through the first opening 33 . The valve core 25 is accommodated in the main valve body cavity 121 , and the valve core 25 is provided with a snap groove 13 which is matched with the valve stem 19 . The other end of the valve stem 19 is connected with the valve core 25 through the slot 13. When the valve stem 19 rotates, the valve stem 19 drives the valve core 25 to rotate together to realize the switching of the working state of the ball valve.

The ball valve also includes a first passage 34, a second passage 35, and a third passage 36 that can be used to communicate with the outside. As far as a single main valve body 24 part is concerned, the first passage 34, the second passage 35, and the third passage 36 and the The main valve body cavity 121 is connected, but in the product, the first channel 34 , the second channel 35 and the third channel 36 are connected or not communicated with the main valve body cavity 121 through the control valve core 25 , or the third channel 36 is selectively is communicated with the first channel 34 or the second channel 35 .

The ball valve is also provided with a first valve seat 22 and a second valve seat 37 in the main valve body 24, and the valve core 25 is arranged between the first valve seat 22 and the second valve seat 37 (FIG. 1). The first valve seat 22 It is arranged between the first passage 34 and the valve core 25 , and the second valve seat 37 is arranged between the second passage 35 and the valve core 25 . The first valve seat 22 and the second valve seat 37 can act on the valve core 25 . The function of support can also make the contact parts of the first valve seat 22 and the second valve seat 37 and the valve core 25 sealed, and the valve core 25 slides with the first valve seat 22 and the second valve seat 37 respectively, and the first valve seat 22 is provided on the valve cover 23 . In order to improve the sealing performance, sealing rings may be provided between the first valve seat 22 and the valve cover 23 , between the valve cover 23 and the main valve body 24 , and between the second valve seat 37 and the main valve body 24 .

The valve cover 23 includes a large-diameter portion 233 and a small-diameter portion 232. The small-diameter portion 232 is provided with an annular groove 231 at one end away from the large-diameter portion 233. The annular groove 231 is fitted with the main valve body. A sealing ring 20 is provided, and the valve cover 23 The second opening portion 17 may be connected with the second opening portion 17 by screwing, and or, the large diameter portion 233 of the valve cover 23 may be sealed and fixed by welding at the place where the valve cover 23 cooperates with the second opening portion 17 . One or even two of the sealing ring sealing and welding sealing can be selected. For example, in this embodiment, the sealing ring 20 is far away from the welding seal, so the sealing ring 20 can be prevented from being deformed by heat during welding. Welding two sealing methods can improve the sealing performance of the main valve body.

In this embodiment, a part of the second passage 35 is located in the main valve body 24 and a part is located in the valve cover 23 . The main valve body 24 cooperates with the valve cover 23 and the first valve seat 22 to form the second passage 35 . In this embodiment, by adopting the method of arranging the valve cover, on the one hand, it is beneficial to install the first valve seat 22, the second valve seat 37 and the valve core 25, and on the other hand, it is also beneficial to process the first passage 34 and the second passage 35. The first channel 34 and the second channel 35 can be reasonably arranged so that the connection between the first channel 34 and the second channel 35 and the main valve body cavity 121 is located on the side wall of the main valve body cavity 121, and the first channel 34 is located in the main valve body. The port of the outer wall and the port of the second channel 35 located on the outer wall of the main valve body may be located on the same side of the outer wall of the main valve body, for example, the bottom of the main valve body, the outer end of the first channel 34 and the outer end of the second channel 35 may be both. It is located at the bottom of the main valve body, which makes the main valve body compact and can reduce the installation space.

The main valve body 24 is also provided with a communication hole 26 on the end surface of the end surface where the main valve body 24 cooperates with the gear box 16 . The second cavity 111 communicates with the main valve body cavity 121 through the communication hole 26 , which can balance the pressure difference between the second cavity 111 and the main valve body cavity 121 and reduce the driving force required to drive the valve core 25 .

As shown in FIGS. 7-8 , the valve core 25 has a spherical or quasi-spherical structure. Of course, the valve core 25 can also be a cylindrical structure, and the valve core 25 is provided with a flow channel 41 . In this embodiment, the flow channel 41 of the valve core 25 includes a first channel 51 and a second channel 52 . One end of the first channel 51 is located on the outer wall of the valve core 25 , and the other end of the first channel 51 is connected to the second channel 52 . One end of the second hole 52 is located on the outer wall of the valve core, the other end of the second hole 52 is communicated with the first hole 51, and the connection between the first hole 51 and the second hole 52 is located at the center of the valve core 25 or near the center. Projected in a direction perpendicular to the first channel 51 and the second channel 52 , the angle formed between the projections of the first channel 51 and the second channel 52 ranges from 45° to 135°.

The ports of the flow channel 41 on the outer wall of the valve core 25 are the first port port 411 and the second port port 412 respectively, and the groove channel of the outer wall of the valve core 25 includes the first groove portion 38 and the second groove portion 39 , one end of the first groove portion 38 is located at the first channel port portion 411, the first groove portion 38 is communicated with the first channel 51, one end of the second groove portion 39 is located at the second channel port portion 412, and the second groove portion 39 is located at the second channel port portion 412. The portion 39 communicates with the second orifice 52 . The axis of the first orifice 51 and the axis of the second orifice 52 are located on the same plane or approximately on the same plane. As shown in FIG. 8 , the plane intersects with the surface of the valve core 25 on two arcs: the first arc a and the second arc line b, the first groove portion 38 is at or near the intersection of the first arc line a and the first tunnel port portion 411, along the distance of the first arc line a away from the first tunnel 51. extending in the direction along the first arc line a away from the first channel 51, the depth of the first groove portion 38 gradually decreases.

The second groove portion 39 extends in a direction away from the first arc line a of the second channel 52 at or near the intersection of the first arc line a and the second channel port portion 412, along the first circle The arc a is away from the direction of the second channel 52, and the depth of the second groove portion gradually decreases.

Both the flow area of the first groove portion 38 and the flow area of the second groove portion 39 are much smaller than the flow area of the flow channel 41 . The specific dimensions of the flow area of the first groove portion 38 and the flow area of the second groove portion 39 are determined by the system, and are not specifically limited here.

It should be noted here that the depth of the first groove portion 38 may remain unchanged in the direction away from the first hole 51 , and the depth of the second groove portion 39 may also be unchanged in the direction away from the second hole 52 .

It should also be noted here that the depth of the first groove portion 38 may first increase and then decrease in the direction away from the first channel 51 , and the depth of the end of the first groove portion 38 away from the first channel port 411 is smaller than that of the first channel port 411 . The depth of one end of the groove portion 38 close to the port portion 411 of the first channel, the depth of the second groove portion 39 may first increase and then decrease in the direction away from the second channel 52, and the second groove portion 39 is far away from the second channel 52. The depth of one end of the tunnel port portion 412 is smaller than the depth of the end of the second groove portion 39 close to the second tunnel port portion 412 .

The ball valve of this embodiment includes at least two working states: a first working state and a second working state. In the first working state, as shown in FIG. 10 , the flow channel 41 communicates with the first channel 34 and the third channel 36 , the second channel 35 is blocked by the valve core 25 , and the fluid can flow in from the third channel 36 through the flow channel 41 Flow out from the first channel 34; in the second working state, as shown in FIG. 11, the flow channel 41 communicates with the second channel 35 and the third channel 36, the first channel 34 is blocked by the valve core 25, and the fluid can flow from the third channel 36 flows in and flows out from the second channel 35 through the flow channel 41 .

The groove channel can play the role of pressure relief when switching between the first working state and the second working state of the ball valve. As shown in Figure 12, during the transition of the ball valve from the first working state to the second working state, when the valve When the core 25 is in the position shown in FIG. 12 , that is, in the intermediate state of transition from the first working state to the second working state, the fluid flows in from the third passage 36 , due to the first groove portion 38 and the second groove portion 39 . The existence of the third channel 36 and the first channel 34 and the second channel 35 keep a small flow of conduction, and the fluid flows into the first channel 34 and the second channel through the first groove part 38 and the second groove part 39 35, so that the system pressure of the ball valve can be prevented from being too high in this state, the fluid flow noise can be prevented, and the driving force required to drive the valve core can be reduced.

It should be noted here that before the valve core 25 rotates to the position corresponding to the intermediate state between the first working state and the second working state, the first groove portion 38 and the second groove portion 39 have made the third passage 36 and the first The channel 34 and the second channel 35 are communicated at the same time; by setting the size of the central angle corresponding to the first groove portion 38 and the second groove portion 39, the valve core 25 can be accurately controlled to rotate clockwise from the position corresponding to the first working state to a certain amount After the angle, the first groove part 38 and the second groove part 39 make the third channel 36 communicate with the first channel 34 and the second channel 35 at the same time, and the valve core 25 is set to rotate clockwise from the position corresponding to the first working state After the angle β, the first groove portion 38 is communicated with the second channel 35, and the central angle of the circular arc between the two ends of the first groove portion 38 is set to θ, then Wherein R1 is the diameter of the flow channel 41, R2 is the diameter of the second channel 35, R0 is the diameter of the valve core 25 (Fig. 13), and the range of β can be 0°～45°

It should also be noted here that the first groove portion 38 or the second groove portion 39 can also be provided separately, which can also prevent the system pressure from being too high during the transition of the ball valve from the first working state to the second working state.

In another embodiment, as shown in FIG. 14 , the groove channel further includes a first notch portion 54 and a second notch portion 55 , and the first notch portion 54 is provided between the first groove portion 38 and the first port portion 411 . During this time, the first groove portion 38 communicates with the flow channel 41 through the first cutout portion 54, the depth of the first cutout portion 54 is greater than the depth of the first groove portion 38, and is away from the first hole 51 along the first arc line a. In the direction of the direction, the depth of the first notch portion 54 gradually decreases, and the gradually decreasing magnitude of the depth of the first groove portion 38 is smaller than the gradually decreasing magnitude of the depth of the first notch portion 54 .

The second notch portion 55 is disposed between the second groove portion 39 and the second port portion 412 , the second groove portion 39 communicates with the flow channel 41 through the second notch portion 55 , and the depth of the second notch portion 55 is greater than that of the first notch portion 55 . The depth of the second groove portion 39, along the direction of the first arc line a away from the second channel 52, the depth of the second gap portion 55 gradually decreases, and the depth of the second groove portion 39 gradually decreases. The depth of the second cutout portion 55 gradually decreases. In this way, the flow area of the first groove portion 38 and the second groove portion 39 and the flow channel 41 in communication is increased, that is, the flow area of the fluid is larger. Therefore, from the first working state to the second working state In the intermediate state of the transition, the groove channel has a better pressure relief effect.

Yet another embodiment of the present invention is shown in FIGS. 16 to 21 . The flow channel 41' of the valve core 25' in this embodiment includes a first hole 51', a second hole 52' and a third hole 53'. One end of the first hole 51' is located on the outer wall of the valve core 25', and the first hole The other end of the hole 51' is communicated with the second hole 52' and the third hole 53, one end of the second hole 52' is located on the outer wall of the valve core 25', and the other end of the second hole 52' is connected with the first hole 51' It communicates with the third hole 53. One end of the third hole 53 is located on the outer wall of the valve core 25', and the other end of the third hole 53 is communicated with the first hole 51' and the second hole 52'. The first hole 51' The connection between the second hole 52' and the third hole 53 is at or near the center of the valve core 25', the first hole 51' and the third hole 53 are coaxially arranged, and the axis of the second hole 52' is coaxial with the first hole. The common axis of 51' and the third hole 53 are perpendicular to each other, and the ports of the flow channel 41' on the outer wall of the valve core 25' are the first hole port 411', the second hole port 412' and the third hole port 413 respectively. , the groove channel of the outer wall portion of the valve core 25' includes a first groove portion 38', a second groove portion 39', a third groove portion 43 and a fourth groove portion 45. One end is located at the port portion 411' of the first channel, the first groove portion 38' communicates with the first channel 51', one end of the second groove portion 39' is located at the port portion 412' of the second channel, and the second groove portion 39' It communicates with the second channel 52', one end of the third groove portion 43 is located at the port portion 412' of the second channel, the third groove portion 43 communicates with the second channel 52', and one end of the fourth groove portion 45 is located at the third channel port 412'. The channel port portion 413 and the fourth groove portion 45 communicate with the third channel 53 .

The axis of the second hole 52' and the common axis of the first hole 51' and the third hole 53 are located on the same plane or approximately on the same plane. As shown in Figure 16, the plane intersects the surface of the valve core in three arcs: The third circular arc line c, the fourth circular arc line d and the fifth circular arc line e, the first groove portion 38' is at or near the intersection of the third circular arc line c and the first tunnel port portion 411', Extending along the direction of the third circular arc line c away from the first hole channel 51 ′, along the direction of the third circular arc line c away from the first hole channel 51 ′, the depth of the first groove portion 38 ′ gradually decreases.

The second groove portion 39' extends in a direction away from the fourth arc line d of the second hole 52' at or near the intersection of the fourth arc line d and the second tunnel port portion 412', along the The fourth arc line d is away from the direction of the second hole 52', and the depth of the second groove portion 39' gradually decreases.

The third groove portion 56 is axially symmetrical to the second groove portion 39' and is disposed on the other side of the second channel port portion 412', and the fourth groove portion 45 is axially symmetrical to the first groove portion 38'. The third orifice port portion 413 .

The ball valve of this embodiment includes three working states: a first working state, a second working state and a third working state. In the first working state, as shown in FIG. 17 , the flow channel 41 ′ communicates with the first channel 34 and the third channel 36 , the second channel 35 is blocked by the valve core 25 ′, and the fluid can flow in from the third channel 36 , The channel 41' flows out from the first channel 34; in the third working state, as shown in FIG. flow in and flow out from the first channel 34 and the second channel 35 respectively through the flow channel 41'; in the second working state, as shown in Figure 19, the flow channel 41' communicates with the second channel 35 and the third channel 36, the first The channel 34 is blocked by the valve core 25 ′, and the fluid can flow in from the third channel 36 and flow out from the second channel 35 through the flow channel 41 ′.

Similarly, in this embodiment, the groove portion on the surface of the valve core can play the role of pressure relief when switching between the first or second working state and the third working state of the ball valve. Figure 20 shows when the groove channel plays the role of pressure relief. Schematic diagram of the position of the valve core, that is, when the intermediate state transitions from the first working state to the third working state, the fluid flows in from the third channel 36 at this time, because the second groove portion 39' and the first groove portion 38' make the The third channel 36 maintains a small flow of conduction with the first flow channel 34 and the second flow channel 35, respectively, and the fluid flows into the first flow channel 34 and the second flow channel through the second groove portion 39' and the first groove portion 38', respectively. The flow channel 35 can release the pressure of the system, avoid large fluid noise due to excessive pressure, and also reduce the driving force required to drive the valve core. FIG. 21 is a schematic diagram of another position of the valve core when the groove channel plays the role of pressure relief. Similarly, the pressure relief is realized by the conduction effect of the third groove portion 43 and the fourth groove portion 45 .

In yet another embodiment of the present invention, as shown in FIG. 22 , the groove channel further includes a first notch portion 54 ′, a second notch portion 55 ′, a third notch portion 56 and a fourth notch portion 57 . The first notch portion 54 ' is disposed between the first groove portion 38' and the first port portion 411', the first groove portion 38' communicates with the flow passage through the first cutout portion 54', and the depth of the first cutout portion 54' is greater than the depth of the first cutout portion 54'. The depth of a groove portion 38', along the direction of the third arc line c away from the first hole 51', the depth of the first notch portion 54' gradually decreases, and the depth of the first groove portion 38' gradually decreases The magnitude is smaller than the magnitude of the gradually decreasing depth of the first notch portion 54 ′.

The second notch portion 55' is disposed between the second groove portion 39' and the second port portion 412', the second groove portion 39' communicates with the flow channel through the second notch portion 55', and the second notch portion 55' ' is greater than the depth of the second groove portion 39', along the direction of the fourth arc line d away from the second hole 52', the depth of the second notch portion 55' gradually decreases, the second groove portion 39' The magnitude of the gradual decrease in depth is smaller than the magnitude of the gradual decrease in the depth of the second notch portion 55 ′.

The third notch portion 56 is provided between the third groove portion 56 and the second port portion 412 ′, the third groove portion 56 communicates with the flow channel through the third notch portion 56 , and the third notch portion 56 communicates with the second notch The portion 55' is axisymmetrically disposed on the second port portion 412'.

The fourth notch portion 57 is provided between the fourth groove portion 45 and the third port portion 413 , the fourth groove portion 45 communicates with the flow channel through the fourth notch portion 57 , and the fourth notch portion 57 communicates with the first notch portion 54 ′ is axially symmetrically disposed on the third port 413 .

This arrangement can improve the pressure relief effect of the ball valve when switching modes. Other parts of this embodiment are the same as or similar to the above-mentioned embodiments, and will not be repeated here.

It should be noted here that the groove channel may also be a through hole, one end of the through hole is communicated with the flow channel 41, and the other end of the through hole is located on the outer wall of the valve core.

It should be noted that the above embodiments are only used to illustrate the present invention and not to limit the technical solutions described in the present invention. Equal directional definition, although this specification has described the present invention in detail with reference to the above-mentioned embodiments, but, those of ordinary skill in the art should understand that those skilled in the art can still modify or equivalently replace the present invention, And all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims (10)

1. a kind of ball valve, including driving mechanism, transmission mechanism, valve component and spool, which is characterized in that the driving mechanism packet Electric machine assembly, casing and attachment base are included, the electric machine assembly includes motor shaft, and the transmission mechanism includes planetary wheeling assembly and valve Bar, the motor shaft and the planetary wheeling assembly are sequentially connected, and one end of the valve rod is fixedly connected with the planetary wheeling assembly, The other end of the valve rod and the spool are sequentially connected, and the valve component includes main valve body and gear-box, the gear-box It is formed with the second chamber, one end of the gear-box is fixedly connected with the attachment base, between the gear-box and the attachment base Sealed set, the other end of the gear-box and the main valve body are fixed and junction seals, and a part of the valve rod is located at The gear-box, a part are located at the main valve body；

The ball valve further includes main valve body cavity, first passage, second channel and third channel, and the spool is placed in the main valve Body cavity, the spool are provided with runner, and by controlling the movement of the spool, the third channel may be selected by the runner Be connected to the first passage or second channel.

2. ball valve according to claim 1, which is characterized in that the planetary wheeling assembly is at least partly installed on described second Chamber, the planetary wheeling assembly include planetary gear set and limited post, and the limited post and the main valve body are fixed or one, described Planetary gear set includes limiting section, the first gear ring and the second gear ring with limited post cooperation, and the limiting section is set to described For second gear ring towards the spool side, at least part of the limited post protrudes into the limiting section, second gear ring with The valve rod is fixed or one, when the one end inner wall of the limited post and the limiting section abuts against, the planetary gear set It stops operating.

3. ball valve according to claim 2, which is characterized in that the limiting section includes two arcuate sockets, the limited post Across the arcuate socket, it is slidably matched between the inner wall of the arcuate socket and the limited post；Or the limiting section includes two A arc groove, the arc groove are slidably matched with the limited post.

4. ball valve according to claim 2 or 3, which is characterized in that there are two the limited posts, and two limited posts It is symmetrical centered on the center of circle of the second gear ring, described two limiting sections it is symmetrical centered on the center of circle of the second gear ring and It is arranged in 90 ° of arc chord angles.

5. ball valve according to claim 4, which is characterized in that the main valve body further includes the first opening portion and the second opening Portion, the valve rod pass through first opening portion and protrude into the main valve body cavity, and second opening portion is provided with valve deck, and one The second channel is divided to be located at the main valve body, a part of second channel is located at the valve deck；

The valve deck includes large diameter portion and small diameter portion, and the small diameter portion is provided with annular recessed in one end far from the large-diameter portion Sealing ring, the large-diameter portion of the valve deck and second opening portion are provided at slot, the annular groove and main valve body cooperation It is sealed between inner wall；

The port that the first passage is located at the port of main valve body outer wall and second channel is located at main valve body outer wall is located at the master The same side outer wall of valve body.

6. ball valve according to claim 5, which is characterized in that be provided with the first valve seat and the second valve in the main valve body Seat, the spool are set between first valve seat and the second valve seat, and the spool is slidably matched with first valve seat, institute It states spool to be slidably matched with second valve seat, first valve seat is set between the first passage and the spool, institute It states the second valve seat to be set between the second channel and the spool, and first valve seat is set to the valve deck.

7. ball valve according to claim 6, which is characterized in that described sleeve pipe includes tubular body and upper cover plate, it is described on Cover board includes the auxiliary section with tubular body cooperation, and the tubular body and the upper cover plate are sealed in the matching part Fixed, the upper cover plate further includes towards the annular protrusion inside described sleeve pipe, and one end of the motor shaft is limited in the ring Shape protrusion, the tubular body and the upper cover plate are fixed or one.

8. ball valve according to claim 1-7, which is characterized in that cooperate in the main valve body and the gear-box The end face portion of one end be additionally provided with intercommunicating pore, one end of the intercommunicating pore is connected with the main valve body cavity, the intercommunicating pore The other end be connected with second chamber, second chamber is connected to the main valve body cavity by the intercommunicating pore.

9. ball valve according to claim 1, which is characterized in that the runner includes the first duct and the second duct, described The one end in the first duct is located at the outside wall portions of the spool, and the other end in first duct is connected with second duct, The one end in second duct is located at the outside wall portions of the spool, and the other end in second duct is connected with first duct Logical, the junction in first duct and second duct is located at center or the immediate vicinity of the spool；Perpendicular to institute It states and is projected on the direction in the first duct and the second duct, the angle model formed between first duct and the projection in the second duct It encloses are as follows: 45 °~135 °.

10. ball valve according to claim 1, which is characterized in that the runner includes the first duct, the second duct and third Duct, the one end in first duct are located at the outside wall portions of the spool, the other end in first duct and second hole Road is connected with third duct, and the one end in second duct is located at the outside wall portions of the spool, second duct it is another End is connected with first duct and third duct, and the one end in the third duct is located at the outside wall portions of the spool, described The other end in third duct is connected with first duct and the second duct, first duct, the second duct and third hole Center or immediate vicinity of the junction in road in the spool, first duct and the third duct are coaxially disposed.