CN111692375B - Backwash valve for pump station - Google Patents
Backwash valve for pump station Download PDFInfo
- Publication number
- CN111692375B CN111692375B CN202010465859.5A CN202010465859A CN111692375B CN 111692375 B CN111692375 B CN 111692375B CN 202010465859 A CN202010465859 A CN 202010465859A CN 111692375 B CN111692375 B CN 111692375B
- Authority
- CN
- China
- Prior art keywords
- fixed
- valve body
- rubber
- sealing
- oil storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000012634 fragment Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 64
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 24
- 229910052802 copper Inorganic materials 0.000 claims description 24
- 239000010949 copper Substances 0.000 claims description 24
- 239000012528 membrane Substances 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
- F16K11/056—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with ball-shaped valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1266—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like one side of the diaphragm being acted upon by the circulating fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
- F16K31/1268—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like with a plurality of the diaphragms
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a backwash valve for a pump station, which comprises a valve body, a rubber ring and a spring elastic sheet, wherein the upper end of the outer side of the valve body is provided with a rubber oil storage area, fastening bolts are fixed on two sides of the outer side of the rubber oil storage area, the lower end of the inner side of the rubber oil storage area is connected with an oil outlet space, one side of the oil outlet space is provided with an inner membrane, one side of the inner side of the valve body is provided with a water inlet, and the outer side of the water inlet is provided with a fixing ring. This backwash valve for pump station is provided with the spacing groove, spacing groove symmetric distribution is in C shape sealed fixed block both sides to constitute the block structure between spacing groove and the stopper, the setting can guarantee that the spring shell fragment is fixed in the fastness and the stability of the inboard upper end of C shape sealed fixed block in the spacing groove of C shape sealed fixed block both sides, avoids appearing becoming flexible and leads to the unable condition that blocks the rivers of steel ball, and the dismantlement maintenance of later stage of being convenient for when the block is guaranteed stability simultaneously.
Description
Technical Field
The invention relates to the technical field of backwash valves, in particular to a backwash valve for a pump station.
Background
The back flush valve is a special hydraulic control valve, is driven by pipeline system pressure, can automatically perform two-position three-way switching, realizes automatic back flush of the filter, has a simple structure and high reliability, and can ensure long-time stable operation under the condition of no maintenance. The diaphragm driving structure can change the flow direction of water smoothly only by a short stroke, and the water inlet is closed when the back flushing port is opened, and vice versa. Avoiding overflow of the filter or mixing of clear water and wastewater.
The backwash valve in the market is not stable and firm enough in holistic structure, appears easily in the in-service use in-process not hard up circumstances that leads to influencing the in-service use effect, and valve body inner structure hardness and leakproofness are not good enough simultaneously, lead to the problem that life is shorter, and for this reason, we propose a backwash valve for pump station.
Disclosure of Invention
The invention aims to provide a backwash valve for a pump station, which aims to solve the problems that the backwash valve proposed in the background art is not stable and firm enough in the whole structure, and is easy to loose in the actual use process to influence the actual use effect, and meanwhile, the hardness and the tightness of the internal structure of a valve body are not good enough to cause the short service life.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a backwash valve for pump station, includes valve body, rubber circle and spring shell fragment, the outside upper end of valve body is provided with the rubber oil storage district, and the outside both sides in rubber oil storage district are fixed with fastening bolt, the inside lower extreme in rubber oil storage district is connected with out oily space, and one side in play oily space is provided with the inner membrance, inside one side of valve body is provided with the water inlet, and the outside of water inlet is provided with the retainer plate, one side of retainer plate is provided with the rubber circle, and the opposite side external fixation of retainer plate has fixing bolt, the inside opposite side of valve body is provided with the delivery port, and the inboard of delivery port is provided with the copper seal cover, the other end of delivery port is connected with pipeline, and pipeline's outside is provided with the sealing layer, the outside of sealing layer is fixed with the sealing bolt, lower extreme one side of valve body is provided with the regulating block, and the lower extreme outside central point of valve body puts and is fixed with C shape sealing fixed block, the both ends inside of C shape sealing fixed block is provided with the spacing groove, and the inboard of spacing groove is fixed with the stopper, one side of stopper is fixed with the spring shell fragment.
Preferably, the fastening bolt is fixedly connected with the rubber oil storage area, and a detachable structure is formed between the rubber oil storage area and the valve body.
Preferably, the rubber ring and the fixed ring are concentric in distribution, and an embedded structure is formed between the rubber ring and the fixed ring.
Preferably, the outer side of the copper sealing sleeve is attached to the inner side of the water outlet, and an integrated structure is formed between the copper sealing sleeve and the water outlet.
Preferably, the limit grooves are symmetrically distributed on two sides of the C-shaped sealing fixed block, the size of the limit grooves is identical to that of the limit blocks, and a clamping structure is formed between the limit grooves and the limit blocks.
Preferably, the spring elastic sheets and the C-shaped sealing fixing blocks are distributed in parallel, and the spring elastic sheets and the C-shaped sealing fixing blocks form an elastic structure.
Preferably, the upper end of the spring elastic piece is provided with a steel ball, and the lower end of one side of the outer part of the C-shaped sealing fixing block is provided with a bolt.
Preferably, the bolt is fixedly connected with the C-shaped sealing fixed block, and a detachable structure is formed between the C-shaped sealing fixed block and the valve body.
Compared with the prior art, the invention has the beneficial effects that: the backwash valve for the pump station is provided with the fastening bolt, the fastening bolt is fixedly connected with the rubber oil storage area, the fastening bolt is fixed at the upper end of the valve body through the rubber oil storage area, the fixation firmness and tightness can be ensured, the condition that the actual use effect is influenced by oil leakage caused by looseness in the actual use process is avoided, meanwhile, the detachable structure is convenient for adding oil in the later period, and the actual service life of the backwash valve is prolonged;
The rubber ring and the fixed ring are concentric, the rubber ring and the fixed ring which are concentric can ensure the accuracy of the positions between the rubber ring and the fixed ring, the condition that the water leakage occurs due to the fact that the fixed ring is connected with a water pipe in an insufficient manner in the actual use process is avoided, meanwhile, the embedded structure has good sealing performance and firmness, and the actual use effect of the backwash valve is greatly improved;
The outer side of the copper sealing sleeve is attached to the inner side of the water outlet, the copper sealing sleeve and the water outlet which are attached to each other can ensure the tightness and the firmness of connection between the copper sealing sleeve and the water outlet, the effect of the steel ball on water blocking of the copper sealing sleeve is ensured, meanwhile, the integrated structure has good stability, and the condition that the use effect is influenced due to loosening of the copper sealing sleeve under the condition of long-term use can not occur;
Spacing groove symmetric distribution constitutes the block structure in C shape sealed fixed block both sides to spacing groove and stopper between, the setting can guarantee that the spring shell fragment is fixed in the fastness and the stability of the inboard upper end of C shape sealed fixed block in the spacing groove of C shape sealed fixed block both sides, avoids appearing becoming flexible and leads to the unable condition that blocks rivers of bouncing of steel ball, and the dismantlement maintenance in later stage of being convenient for is convenient for in the time of the block guarantees stability simultaneously.
Drawings
FIG. 1 is a schematic view of an open state structure of the present invention;
FIG. 2 is a schematic view of a seal structure according to the present invention;
FIG. 3 is a schematic view of the structure of the retainer ring of the present invention.
In the figure: 1. a valve body; 2. a rubber oil storage area; 3. a fastening bolt; 4. an oil outlet space; 5. an inner membrane; 6. a water inlet; 7. a fixing ring; 8. a fixing bolt; 9. a rubber ring; 10. a water outlet; 11. copper sealing sleeve; 12. a delivery conduit; 13. a sealing layer; 14. a fastening layer; 15. a sealing bolt; 16. an adjusting block; 17. c-shaped sealing fixed block; 18. a limit groove; 19. a limiting block; 20. a spring leaf; 21. a steel ball; 22. and (5) a bolt.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a backwash valve for pump station, including valve body 1, rubber oil storage area 2, fastening bolt 3, go out oily space 4, inner membrance 5, water inlet 6, retainer plate 7, fixing bolt 8, rubber circle 9, delivery port 10, copper seal cover 11, pipeline 12, sealing layer 13, fastening layer 14, sealing bolt 15, regulating block 16, C shape sealing fixed block 17, spacing groove 18, stopper 19, spring shell fragment 20, steel ball 21 and bolt 22, the outside upper end of valve body 1 is provided with rubber oil storage area 2, and the outside both sides of rubber oil storage area 2 are fixed with fastening bolt 3, fastening bolt 3 is fixed connection with rubber oil storage area 2, and constitute detachable construction between rubber oil storage area 2 and the valve body 1, can guarantee fixed fastness and compactness through rubber oil storage area 2 is fixed in valve body 1 upper end, the circumstances that the influence of the outer leakage of oil that can not appear loosening in the actual use in-process can not appear, simultaneously detachable construction is convenient for later stage to the actual service life of this valve to the interpolation of oil;
The lower end of the inside of the rubber oil storage area 2 is connected with an oil outlet space 4, one side of the oil outlet space 4 is provided with an inner membrane 5, one side of the inside of the valve body 1 is provided with a water inlet 6, the outer side of the water inlet 6 is provided with a fixed ring 7, one side of the fixed ring 7 is provided with a rubber ring 9, the other side of the fixed ring 7 is externally fixed with a fixed bolt 8, the rubber ring 9 and the fixed ring 7 are concentrically distributed, an embedded structure is formed between the rubber ring 9 and the fixed ring 7, the concentrically distributed rubber ring 9 and the fixed ring 7 can ensure the accuracy of the positions between the two, the condition that water leaks outside due to insufficient connection of the fixed ring 7 with a water pipe in the actual use process can not occur, meanwhile, the embedded structure has good sealing performance and firmness, and the actual use effect of the backwash valve is greatly improved;
The water outlet 10 is formed in the other side of the inside of the valve body 1, the copper sealing sleeve 11 is arranged on the inner side of the water outlet 10, the outer side of the copper sealing sleeve 11 is attached to the inner side of the water outlet 10, an integrated structure is formed between the copper sealing sleeve 11 and the water outlet 10, the copper sealing sleeve 11 and the water outlet 10 which are attached to each other can ensure the tightness and the firmness of connection between the copper sealing sleeve 11 and the water outlet 10, the effect of the steel ball 21 on water blocking of the copper sealing sleeve 11 is ensured, meanwhile, the integrated structure has good stability, and the condition that the use effect is influenced due to looseness of the copper sealing sleeve 11 under the condition of long-term use can not occur;
The other end of delivery port 10 is connected with pipeline 12, and pipeline 12's outside is provided with sealing layer 13, sealing layer 13's outside is fixed with fastening layer 14, and fastening layer 14's outside is fixed with sealing bolt 15, lower extreme one side of valve body 1 is provided with regulating block 16, and the lower extreme outside central point of valve body 1 puts and is fixed with C shape sealing fixed block 17, the both ends inside of C shape sealing fixed block 17 is provided with spacing groove 18, and the inboard of spacing groove 18 is fixed with stopper 19, one side of stopper 19 is fixed with spring shell fragment 20, spring shell fragment 20 and C shape sealing fixed block 17 are parallel distribution, and spring shell fragment 20 and C shape sealing fixed block 17 constitute elastic structure, the upper end of spring shell fragment 20 is provided with steel ball 21, C shape sealing fixed block 17 outside one side lower extreme is provided with bolt 22, bolt 22 and C shape sealing fixed block 17 are fixed connection, and constitute detachable construction between C shape sealing fixed block 17 and the valve body 1, spacing groove 18 symmetric distribution is in C shape sealing fixed block 17 both sides, and stopper 18 inside and stopper 19 size identical, and constitute between spacing groove 18 and the stopper 19 and the stopper structure is fixed block 17 and can guarantee that the water current stability is difficult to guarantee simultaneously to guarantee to take place at the same time at the fixed point of stability of keeping loose after the fixed state of C shape sealing fixed block 17.
Working principle: for such a backwash valve for a pump station, corresponding water pipes are fixedly connected to the water inlet 6 and the water outlet 10, and when the pump is started, the valve body 1 is opened. The water flow from the pump is led to the water inlet 6 through the valve, whereupon the bilge well is flushed. The negative pressure induced by the water flow in the valve body 1 starts to move the spring plate 20 in the opposite direction, thus lifting the ball up after about 20-50 seconds. Oil flows from the rubber oil reservoir 2 to the oil outlet space 4 between the inner membrane 5 and the valve body 1. Forcing the inner membrane 5 to move reversely and pushing the steel ball 21 into the copper sealing sleeve 11, the copper sealing sleeve 11 and the water outlet 10 which are mutually attached can ensure the tightness and firmness of connection between the two, ensure the effect of the steel ball 21 on water blocking of the copper sealing sleeve 11, and simultaneously have good stability of the integrated structure, so that the condition that the use effect is influenced due to loosening of the copper sealing sleeve 11 under the condition of long-term use can not occur. The steel ball 21 blocks the flow of water through the valve and the pump starts to pump the liquid out of the bilge well. When the valve body 1 is closed, the negative pressure instantaneously changes into an overpressure. The inner membrane 5 and the oil are forced to return to their initial positions, and the steel ball 21 returns to the initial position, thus completing the use process of the backwash valve for the whole pump station.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a backwash valve for pump station, includes valve body (1), rubber circle (9) and spring shell fragment (20), its characterized in that: the utility model discloses a valve body, including valve body (1), sealing layer (13) and valve body (1), the outside upper end of valve body (1) is provided with rubber oil storage district (2), and the outside both sides of rubber oil storage district (2) are fixed with fastening bolt (3), the inside lower extreme of rubber oil storage district (2) is connected with oil outlet space (4), and one side of oil outlet space (4) is provided with inner membrance (5), one side of the inside of valve body (1) is provided with water inlet (6), and the outside of water inlet (6) is provided with retainer plate (7), one side of retainer plate (7) is provided with rubber ring (9), and the opposite side outside of retainer plate (7) is fixed with fixing bolt (8), the inside opposite side of valve body (1) is provided with delivery port (10), and the inboard of delivery port (10) is provided with copper seal cover (11), the other end of delivery port (10) is connected with pipeline (12), and the outside of delivery pipeline (12) is provided with sealing layer (13), the outside of sealing layer (13) is fixed with fastening layer (14), and the outside of fastening layer (14) is fixed with sealing bolt (15), one side of water inlet (6) is provided with retainer plate (1), the opposite side outside fixed with sealing block (16) is fixed with the fixed position of valve body (17), limiting grooves (18) are formed in the two ends of the C-shaped sealing fixed block (17), limiting blocks (19) are fixed on the inner sides of the limiting grooves (18), and spring sheets (20) are fixed on one sides of the limiting blocks (19); the fastening bolt (3) is fixedly connected with the rubber oil storage area (2), and a detachable structure is formed between the rubber oil storage area (2) and the valve body (1); the spring elastic pieces (20) and the C-shaped sealing fixed blocks (17) are distributed in parallel, and the spring elastic pieces (20) and the C-shaped sealing fixed blocks (17) form an elastic structure; the upper end of the spring elastic piece (20) is provided with a steel ball (21), and the lower end of one side of the outer part of the C-shaped sealing fixed block (17) is provided with a bolt (22).
2. A backwash valve for a pump station according to claim 1 wherein: the rubber ring (9) and the fixed ring (7) are concentrically distributed, and an embedded structure is formed between the rubber ring (9) and the fixed ring (7).
3. A backwash valve for a pump station according to claim 1 wherein: the outer side of the copper sealing sleeve (11) is attached to the inner side of the water outlet (10), and an integrated structure is formed between the copper sealing sleeve (11) and the water outlet (10).
4. A backwash valve for a pump station according to claim 1 wherein: the limiting grooves (18) are symmetrically distributed on two sides of the C-shaped sealing fixed block (17), the size of the limiting grooves (18) is identical to that of the limiting blocks (19), and a clamping structure is formed between the limiting grooves (18) and the limiting blocks (19).
5. A backwash valve for a pump station according to claim 1 wherein: the bolt (22) is fixedly connected with the C-shaped sealing fixed block (17), and a detachable structure is formed between the C-shaped sealing fixed block (17) and the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465859.5A CN111692375B (en) | 2020-05-28 | 2020-05-28 | Backwash valve for pump station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010465859.5A CN111692375B (en) | 2020-05-28 | 2020-05-28 | Backwash valve for pump station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111692375A CN111692375A (en) | 2020-09-22 |
| CN111692375B true CN111692375B (en) | 2024-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010465859.5A Active CN111692375B (en) | 2020-05-28 | 2020-05-28 | Backwash valve for pump station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111692375B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212297741U (en) * | 2020-05-28 | 2021-01-05 | 河北禹程环保科技有限公司 | Back washing valve for pump station |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB678386A (en) * | 1949-10-19 | 1952-09-03 | Trumek Ltd | Self-closing tap for a lubricating oil drum |
| CN206668216U (en) * | 2016-11-15 | 2017-11-24 | 王建立 | A kind of compact inverse well-flushing valve |
| CN106761650A (en) * | 2017-03-13 | 2017-05-31 | 邹积鹏 | Oil, many microcrack pressure break block releasing techniques of well |
| US10883619B2 (en) * | 2017-06-27 | 2021-01-05 | Hayward Industries, Inc. | Multi-position valve |
| CN207961708U (en) * | 2018-03-09 | 2018-10-12 | 温州大阳科技有限公司 | A kind of solenoid valve |
| CN110553523B (en) * | 2019-10-14 | 2021-01-26 | 蒲城清洁能源化工有限责任公司 | Heat exchange device of combined type methanol evaporator |
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2020
- 2020-05-28 CN CN202010465859.5A patent/CN111692375B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212297741U (en) * | 2020-05-28 | 2021-01-05 | 河北禹程环保科技有限公司 | Back washing valve for pump station |
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| CN111692375A (en) | 2020-09-22 |
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