Disclosure of Invention
The invention aims to solve the technical problems that: the invention provides the on-line detection device for the safety valve, which is used for controlling the fixer for fixing the safety valve through the high-pressure air used for checking the safety valve, and the fixer can fix the safety valve after high-pressure air ventilation, so that the safety valve can be ensured to be in a fixed state before detection, and potential safety hazards are eliminated.
The invention solves the problems existing in the prior art by adopting the technical scheme that:
The utility model provides a relief valve on-line measuring device, includes valve body installation device, valve body installation device include mounting disc and fixer, the mounting disc is used for supporting the relief valve, the fixer is used for with relief valve and mounting disc fixed connection.
The bottom of the mounting plate is connected with a vertical pipe in a penetrating way, the vertical pipe is provided with a pressure detection device, the vertical pipe is connected with a main air pipe in a penetrating way, and the air inlet end of the main air pipe is connected with a high-pressure air supply device.
Preferably, the main air pipe is connected with a second stop valve in series, the fixer is provided with a position detection device, the position detection device is used for detecting whether the fixer is used for fixing the safety valve, and after the fixer is used for fixing the safety valve, the second stop valve is opened.
Preferably, the vertical pipe is connected with an air release pipe in series, the air release pipe is connected with a first stop valve in series, and after the position detection device detects that the fixer contacts the safety valve, the second stop valve is closed, and the first stop valve is opened.
Preferably, the fixer comprises an arc-shaped rod, wherein two ends of the arc-shaped rod are connected with downward pressing blocks through connecting rods, two symmetrically arranged rotating shafts are arranged on the outer sides of the arc-shaped rod, and the rotating shafts are rotationally connected with the vertical pipe.
The arc-shaped rod is sleeved with a sleeve, the sleeve is connected with an air cylinder, the air cylinder controls the sleeve to move up and down, and then the pressing block is driven to rotate around the axis of the rotating shaft, so that the safety valve is pressed and unlocked.
Preferably, the control gas of the cylinder is supplied by a main gas pipe.
Preferably, the cylinder comprises a vertically arranged piston cavity, the bottom of the piston cavity is in through connection with the main air pipe through a joint control air pipe, and the through connection part of the joint control air pipe and the main air pipe is positioned at the air inlet end of the second stop valve.
The piston is arranged in the piston cavity, a telescopic rod is fixed on the piston, the top of the telescopic rod is fixedly connected with the sleeve, a first spring is sleeved on the telescopic rod in the piston cavity, and the piston cavity is fixedly connected with the vertical pipe.
Preferably, the position detecting device is connected with the piston cavity.
Preferably, the position detection device adopts an opposite-incidence photoelectric sensor or a touch switch.
Preferably, the total air pipe is connected with the vertical pipe through a reducing guide pipe.
Preferably, the middle of the installation plate is concavely provided with an installation groove, the center of the installation groove is provided with a through hole, the through hole is in through connection with the vertical pipe, the installation flange at the bottom of the safety valve is clamped inside the installation groove, and the pressing block is pressed above the installation flange.
Compared with the prior art, the invention has the beneficial effects that:
(1) The fixer is linked with the second stop valve which controls whether to pass through high-pressure air to the inside of the safety valve, and the second stop valve can be opened only after the safety valve is fixed by the fixer, so that potential safety hazards are eliminated, and the safety valve checking work is ensured to be safer.
(2) The opening pressure of the safety valve is determined through the pressure curve output by the pressure detection device, and the detection effect is more accurate.
Drawings
The invention will be further described with reference to the drawings and examples.
Figure 1 is a structural diagram of an on-line detecting device for a safety valve according to the present invention,
Figure 2 is a front view of an on-line safety valve inspection apparatus according to the present invention,
Figure 3 is a structural diagram of a valve body installation device in the safety valve on-line detecting device of the present invention,
Figure 4 is a block diagram of the platen of figure 3 after opening,
Figure 5 is an exploded view of figure 3,
Figure 6 is a cross-sectional view of the retainer in the valve body securing apparatus of the present invention,
Figure 7 is an enlarged view of a portion of figure 6 at a,
Figure 8 is an enlarged view of a portion of figure 6 at B,
FIG. 9 is a sectional view showing a supporting table and a buffer tank in an on-line detecting device for a safety valve according to the present invention,
Figure 10 is an enlarged view of a portion of figure 9 at C,
FIG. 11 is a view showing the construction of a buffer tank in an on-line detecting device for a safety valve according to the present invention,
FIG. 12 is a graph of cracking pressure detection according to the present invention.
In the figure, the device comprises a 1-vertical pipe, a 101-rotating shaft bracket, a 102-deflation pipe, a 103-first stop valve, a 2-mounting disc, a 201-sealing groove, a 202-positioning groove, a 203-sealing ring, a 3-reducing ring, a 301-clamping block, a 4-pressing block, a 5-connecting rod, a 6-adjusting rod, a 7-arc rod, an 8-rotating shaft, a 9-sleeve, a 10-telescopic rod, a 1001-piston, a 11-guide sleeve, a 12-fixing frame, a 13-piston cavity, a 1301-combined control air pipe, a 14-first spring, a 15-position detection device, a 16-pressure detection device, a 17-high pressure air supply device, a 18-total air pipe, a 19-second stop valve, a 20-guide pipe, a 21-supporting table, a 22-base cabinet, a 2201-waist-shaped hole, a 23-limiting frame, a 2301-front baffle, a 24-buffer box, a 2401-guide plate, a 2402-through hole, a 25-second spring, a 26-safety valve, a 1-mounting flange and a 2602-air outlet.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the application belong. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the application.
Furthermore, directional terms, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used in the description and claims of the present invention to describe various example structural parts and elements of the present invention, but are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. These directional terms are merely illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite or coincident with the direction of gravity.
The following describes the online detection device for the safety valve in detail with reference to the accompanying drawings.
An on-line detection device for a safety valve is shown in fig. 1 to 12, and comprises a valve body mounting device arranged on a supporting table 21, wherein the valve body mounting device comprises a mounting disc 2 and a fixer, the mounting disc 2 is used for supporting the safety valve 26, and the fixer is used for fixedly connecting the safety valve 26 with the mounting disc 2.
The bottom of the mounting plate 2 is connected with a vertical pipe 1 in a penetrating way, and a pressure detection device 16 is arranged on the vertical pipe 1.
The middle of the mounting plate 2 is concavely provided with a mounting groove, the center of the mounting groove is provided with a through hole, the through hole is in through connection with the vertical pipe 1, and the mounting flange 2601 at the bottom of the safety valve 26 is clamped in the mounting groove. The retainer acts on the mounting flange 2601, and fixedly connects the mounting flange 2601 and the mounting plate 2 by pressing down.
In order to be applicable to mounting flanges 2601 with different outer diameters, in this embodiment, a diameter-changing ring 3 coaxially arranged is sleeved inside the mounting groove, the inner diameter of the diameter-changing ring 3 is the same as the outer diameter of the mounting flange 2601, and the diameter-changing ring 3 is sleeved outside the mounting flange 2601.
The reducing ring 3 and the mounting groove can be connected or spliced through threads, so that replacement is convenient, and in the embodiment, the reducing ring 3 and the mounting groove are connected in a splicing mode. Therefore, the inner wall of the mounting groove is concavely provided with a plurality of positioning grooves 202, the outer circumferential surface of the reducing ring 3 is convexly provided with clamping blocks 301, and the clamping blocks 301 are spliced with the positioning grooves 202.
Since high-pressure air needs to be injected into the safety valve 26 when detecting the opening pressure, the sealing effect between the contact surface of the mounting flange 2601 and the mounting plate 2 is ensured, and the detection effect is prevented from being affected by air leakage. For this reason, in this embodiment, an annular sealing groove 201 is concavely provided at the bottom of the mounting groove, a sealing ring 203 is provided in the sealing groove 201, the sealing ring 203 is in an annular sheet shape, and the top surface thereof is higher than the bottom surface of the mounting groove.
The fixer comprises an arc-shaped rod 7, wherein the radian of the arc-shaped rod 7 is 180 degrees, and the arc-shaped rod 7 is arranged in a semicircular mode. The two ends of the arc-shaped rod 7 are connected with downward-arranged pressing blocks 4 through connecting rods 5, two symmetrically-arranged rotating shafts 8 are arranged on the outer sides of the arc-shaped rod 7, and the rotating shafts 8 are rotatably connected with the vertical pipe 1 through rotating shaft supports 101. The rotating shaft support 101 is fixedly connected with the vertical pipe 1, the rotating shaft 8 is inserted into an inserting hole on the rotating shaft support 101, and the rotating shaft support and the inserting hole are rotatably connected.
The arc-shaped rod 7 is sleeved with a sleeve 9, and the sleeve 9 is positioned at the top point of the arc-shaped plate 7. The sleeve 9 is connected with an air cylinder, the air cylinder controls the sleeve 9 to move up and down, and then the pressing block 4 is driven to rotate around the axis of the rotating shaft 8, so that the safety valve 26 is pressed and unlocked. The shape of the pressing block 4 is an arc-shaped plate, so that the contact area is increased, and the pressing effect is further improved.
The arc-shaped plate 7 drives the pressing block 4 to move up and down through the lever principle, so that the joint of the arc-shaped rod 7 and the sleeve 9 can generate displacement in the vertical direction and also generate displacement in the horizontal direction. In order to avoid interference of the sleeve 9 on the movement of the arc-shaped rod 7, the inner hole of the sleeve 9 is a waist-shaped hole, and the section of the arc-shaped rod 7 is circular.
For mounting flanges 2601 of different outer diameters, the position of the press block 4 needs to be adjusted to optimize the escorting effect. In order to adjust the position of the pressing block 4, the connecting rod 5 comprises a vertical rod, a horizontal rod and an inclined rod connected between the vertical rod and the horizontal rod, the vertical rod is fixedly connected with the pressing block 4, and the horizontal rod of the connecting rod 5 is rotatably connected with an adjusting rod 6. The arc-shaped plate 7 is provided with an adjusting hole, the adjusting rod 6 penetrates through the adjusting hole, the adjusting hole can be a threaded hole, the adjusting rod 6 is a screw, and the adjusting hole and the screw are in threaded connection.
The vertical pipe 1 is connected with a main air pipe 18 in a penetrating way, and the main air pipe 18 is connected with the vertical pipe 1 through a reducing guide pipe 20. The air inlet end of the main air pipe 18 is connected with a high-pressure air supply device 17, and the high-pressure air supply device can adopt a high-pressure air cylinder or an air compressor, and the embodiment adopts the air compressor.
The main air pipe 18 is connected with a second stop valve 19 in series, the fixer is provided with a position detection device 15, the position detection device 15 is used for detecting whether the fixer is used for fixing the safety valve 26, and when the fixer is used for fixing the safety valve 26, the second stop valve 19 is opened.
An air release pipe 102 which is arranged in an open way is connected in series on the vertical pipe 1, and a first stop valve 103 is connected in series on the air release pipe 102. The first stop valve 103 and the second stop valve 19 are electrically controlled valves, and after the position detection device 15 detects that the fixer contacts the safety valve 26, the second stop valve 19 is closed, and the first stop valve 103 is opened. The air release pipe 102 mainly has the function that after the test of the safety valve 26 is finished, the safety valve needs to be removed, the air pressure in the vertical pipe 1 needs to be ensured to be reduced before the safety valve is removed, and the high-pressure air is prevented from being sprayed out when the safety valve 26 is removed, so that potential safety hazards are avoided.
The control gas of the cylinder is supplied by a main gas pipe 18. In order to ensure that the mounting flange 2601 can be pressed by the pressing block 4 before the second stop valve 19 is opened, and linkage between the mounting flange 2601 and the pressing block is realized, in this embodiment, the cylinder comprises a vertically arranged piston cavity 13, the bottom of the piston cavity 13 is in through connection with the main air pipe 18 through a joint control air pipe 1301, the through connection part of the joint control air pipe 1301 and the main air pipe 18 is positioned at the air inlet end of the second stop valve 19, and the air outlet end of the second stop valve 19 is in through connection with the vertical pipe 1.
The piston 1001 is arranged in the piston cavity 13, the telescopic rod 10 is fixed on the piston 1001, the top of the telescopic rod 10 is fixedly connected with the sleeve 9, the telescopic rod 10 positioned in the piston cavity 13 is sleeved with the first spring 14, and the piston cavity 13 is fixedly connected with the vertical pipe 1.
The position detecting device 15 is connected with the piston cavity 13. The position detecting device 15 adopts an opposite-emitting photoelectric sensor or a touch switch.
Therefore, when the high-pressure air supply device 17 supplies the high-pressure air, the high-pressure air flows into the main air pipe 18, and at this time, the second shutoff valve 19 is closed, and the high-pressure air cannot enter the vertical pipe 1. High-pressure air is injected into the piston cavity 13 through the joint control air pipe 1301, the piston 1001 is pushed to overcome the thrust of the first spring 14 to move upwards, the arc-shaped rod 7 is further pushed upwards, the pressing block 4 is enabled to move downwards, and the mounting flange 2601 is pressed. When the piston 1001 moves to the upper side, the position detecting device 15 detects the piston 1001, and if the position detecting device 15 adopts an opposite-shot photoelectric sensor, the piston 1001 blocks the transmitting end and the receiving end of the opposite-shot photoelectric sensor, and if the position detecting device 15 adopts a touch switch, the piston 1001 is in contact with the touch switch. At this time, the second shut-off valve 19 is opened, high-pressure air flows into the vertical pipe 1, and the pressurization is continued to complete the check operation of the relief valve 26.
In order to avoid bending of the telescopic rod 10, a guide sleeve 11 is sleeved outside the telescopic rod 10, and the guide sleeve 11 is fixedly connected with the vertical pipe 1 through a fixing frame 12.
When the air pressure reaches the opening pressure of the relief valve 26, the relief valve 26 is opened and the air is discharged through the air outlet 2602 of the relief valve 26. The high-pressure air supply device 17 is then stopped and the pressure inside the main air pipe 18 is reduced. During the calibration of the relief valve 26, the pressure curve detected by the pressure detection device 16 is shown in fig. 12, wherein the highest point of the pressure curve is the opening pressure of the relief valve 26.
Therefore, when the pressure curve starts to descend, the first stop valve 103 can be controlled to open, the air release pipe 102 is deflated, the air pressure in the air main pipe 18 is reduced, the piston 1001 moves downwards, the pressing block 4 moves upwards, and the pressing of the mounting flange 2601 is released.
Since the air release pipe 102 and the air outlet 2602 both release high pressure air, the operator is not injured by the released high pressure air. In this embodiment, a bottom cabinet 22 with heat dissipation holes is fixed on the supporting table 21, and the high-pressure air supply device 17 is disposed inside the bottom cabinet 22. A limiting frame 23 is fixed above the bottom cabinet 22, and a front baffle 2301 is arranged at one end of the limiting frame 23 facing the exhaust port 2602. The buffer tank 24 is provided inside the stopper 23, and the buffer tank 24 is disposed so as to be opened toward the exhaust port 2602, and high-pressure air discharged from the exhaust port 2602 and the air release pipe 102 is injected into the buffer tank 24.
The rear end of the buffer tank 24 is arranged with the limit frame 23 at intervals, a second spring 25 is arranged between the buffer tank 24 and the limit frame, and high-pressure air is sprayed into the buffer tank 24 or the buffer tank 24 moves backwards to compress the second spring 25 so as to consume the energy of the high-pressure air.
The inside guide plate 2401 that is equipped with the slope of buffer tank 24, buffer tank 24 bottom surface are equipped with a plurality of through-hole 2402, and the bottom cabinet 22 top surface is equipped with a plurality of waist type hole 2201, and through-hole 2402 and waist type hole 2201 correspond to be arranged. The high-pressure air injected into the buffer tank 24 is blown downwards after being guided by the guide plate 2401, then flows into the bottom cabinet 22 through the through hole 2402 and the waist-shaped hole 2201, and is blown to the high-pressure air supply device 17 to be forced to wind.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.