CN113932048B - One-way valve with liquid discharge port capable of being adjusted and controlled in multiple directions - Google Patents

One-way valve with liquid discharge port capable of being adjusted and controlled in multiple directions Download PDF

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Publication number
CN113932048B
CN113932048B CN202111524882.8A CN202111524882A CN113932048B CN 113932048 B CN113932048 B CN 113932048B CN 202111524882 A CN202111524882 A CN 202111524882A CN 113932048 B CN113932048 B CN 113932048B
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China
Prior art keywords
valve
valve body
liquid
locking
liquid discharge
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CN202111524882.8A
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CN113932048A (en
Inventor
张加波
张晞妍
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Changzhou Taohua Electric Appliance Co ltd
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Changzhou Taohua Electric Appliance Co ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00Check valves
    • F16K15/02Check valves with guided rigid valve members
    • F16K15/04Check valves with guided rigid valve members shaped as balls
    • F16K15/044Check valves with guided rigid valve members shaped as balls spring-loaded
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D35/00Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/04Plug, tap, or cock filters filtering elements mounted in or on a faucet
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • F16K27/02Construction of housing; Use of materials therefor of lift valves
    • F16K27/0245Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sliding Valves (AREA)
  • Check Valves (AREA)

Abstract

The invention discloses a check valve with a liquid discharge port capable of being adjusted and controlled in multiple directions, which comprises a liquid inlet valve body and a liquid discharge valve body, wherein a blocking part for stably connecting the liquid inlet valve body and the liquid discharge valve body is connected between the liquid discharge valve body and the liquid inlet valve body; when the liquid discharge connector is rotated, the valve core is connected to the valve hole and connected with the positioning groove arranged on the pressing block. According to the invention, the two pressing blocks are arranged, the liquid drainage interface is directly rotated to realize the change of the direction of liquid drainage, the connection with a pipeline is convenient, the driving rod pushes the pressing blocks to move towards the direction of the valve core, so that the two pressing blocks lock and position the valve core, the stability of the valve core is improved, the high-pressure water flow in the liquid inlet valve body is prevented from being sprayed out from the liquid drainage interface when the liquid drainage interface is rotated, and a good blocking effect is achieved.

Description

One-way valve with liquid discharge port capable of being adjusted and controlled in multiple directions
Technical Field
The invention relates to the technical field of valves, in particular to a one-way valve with a liquid discharge port capable of being adjusted and controlled in multiple directions.
Background
Valves are plumbing accessories used to open and close a pipe, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow). According to their function, they can be classified into shut-off valves, check valves, regulating valves, and the like. The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. Valves used in fluid control systems range in variety and size from the simplest shut-off valves to the variety of valves used in extremely complex autonomous systems. The check valve is one of valves, fluid can only flow along the water inlet, and media at the water outlet cannot flow back, and is commonly called as the check valve. Check valves, also known as check valves or back valves, are used in hydraulic systems to prevent reverse flow of oil or in pneumatic systems to prevent reverse flow of compressed air.
When the existing check valve is used, the liquid discharge direction of the check valve is inconvenient to adjust, the whole valve body needs to be rotated to realize the liquid discharge direction, but the sealing property of the connection between a pipeline and the valve body is influenced, and the leakage of liquid is easy to cause.
Disclosure of Invention
The invention aims to provide a check valve with a liquid discharge port capable of being adjusted and controlled in multiple directions, which has the advantages of convenience in changing the liquid discharge direction, difficulty in causing liquid leakage when the direction is changed, and good blocking effect, and solves the problems that the liquid discharge direction of the check valve is inconvenient to adjust, the whole valve body needs to be rotated to realize the adjustment, but the connection tightness of a pipeline and the valve body is influenced, and the liquid leakage is easily caused.
In order to achieve the purpose, the invention provides the following technical scheme: a check valve with a liquid discharge port capable of being adjusted and controlled in multiple directions comprises a liquid inlet valve body and a liquid discharge valve body, wherein a blocking part used for stably connecting the liquid inlet valve body and the liquid discharge valve body is connected between the liquid discharge valve body and the liquid inlet valve body, a rotatable liquid discharge pipeline is hermetically connected in the liquid discharge valve body, the liquid discharge pipeline is connected with a liquid discharge port used for connecting an external joint, the liquid discharge pipeline is connected with a locking mechanism used for locking and positioning the liquid discharge pipeline, the blocking part is provided with a valve hole used for liquid circulation, the liquid discharge pipeline is connected with a valve core used for blocking the valve hole, one side of the blocking part is connected with a positioning mechanism used for limiting the valve core, the positioning mechanism comprises two pressing blocks, and the liquid discharge pipeline is connected with a driving mechanism used for driving the two pressing blocks to approach or separate from each other;
when the liquid discharge connector is rotated, the valve core is connected to the valve hole and connected with the positioning groove arranged on the pressing block.
Preferably, the positioning mechanism further comprises two inclined pressing blocks, the inclined pressing blocks are connected to the pressing blocks, and the pressing blocks are connected with the blocking portions in a sliding mode.
Preferably, actuating mechanism includes sealing ring, actuating lever, the sealing ring is connected in drainage tube's one end, and the sealing ring is provided with annular spout, the one end and the sliding block fixed linking to each other of sliding connection in annular spout of actuating lever, the other end with set up in the inclined plane of briquetting and slide continuously.
Preferably, the locking mechanism comprises a fixing rod and a locking disc, one end of the fixing rod is connected to the liquid discharge valve body, the other end of the fixing rod is connected with a locking head, the locking head is matched with a locking groove formed in one side of the locking disc, and when the liquid discharge interface is rotated, the locking head is separated from the locking groove.
Preferably, a filter plate for filtering liquid impurities is installed in the liquid discharge pipeline.
Preferably, the valve core is connected with a spring for driving the valve core to move towards the direction of the valve hole, and one end of the spring is connected with the filter plate.
Preferably, an inner cavity and a sewage draining channel are arranged in the liquid draining valve body, the sewage draining channel is communicated with the inner cavity, and a sewage draining outlet is formed in one end of the sewage draining channel.
Preferably, be provided with infusion passageway, feed liquor interface in the feed liquor valve body, feed liquor interface, infusion passageway, valve opening switch on in proper order.
Preferably, the bottom of the inner cavity is concave towards the trapway.
Preferably, the included angle between the inclined plane and the pressing block is 40-60 degrees.
Compared with the prior art, the invention has the following beneficial effects: the two pressing blocks are arranged, so that the liquid drainage connector can be pushed to move towards the direction of the liquid drainage valve body, the valve core is enabled to plug the valve hole of the blocking part, the liquid drainage connector is directly rotated to realize the change of the liquid drainage direction, and the liquid drainage valve is convenient to connect with a pipeline; meanwhile, the liquid discharge pipeline is connected with a driving mechanism for driving the two pressing blocks to approach or separate from each other, the driving mechanism comprises a sealing ring and a driving rod, one end of the driving rod is fixedly connected with a sliding block which is slidably connected with the annular chute, the other end of the driving rod is slidably connected with an inclined plane arranged on the inclined pressing block, the inclined pressing block is connected with the pressing block, and the driving rod pushes the pressing block to move towards the direction of the valve core, so that the two pressing blocks lock and position the valve core, the stability of the valve core is improved, the phenomenon that high-pressure water flow in the liquid inlet valve body is sprayed out from the liquid discharge interface when the liquid discharge interface is rotated is avoided, a good blocking effect is achieved, liquid leakage is prevented, and the use of a one-way valve is facilitated; after the suitable position is adjusted to the flowing back interface, only need loosen the flowing back interface, the thrust that the spring was exerted makes the flowing back pipeline to the direction of keeping away from the flowing back valve body remove, and locking head locks in the locking dish, realizes fixing a position the flowing back interface, prevents to become flexible.
Install the filter plate that is used for filtering liquid impurity through flowing back in the pipeline, can filter impurity in the liquid, regularly open the sealed lid of drain outlet department, be convenient for discharge the spot along sewage pipes, the convenience is to the inside clearance of check valve, and the practicality is strong.
Drawings
FIG. 1 is a schematic view of a liquid discharge interface according to the present invention in a rotated state;
FIG. 2 is a schematic structural view of a liquid discharge interface of the present invention in a locked state;
FIG. 3 is an enlarged view of FIG. 1 at A;
FIG. 4 is a schematic view of a seal ring structure of the present invention;
FIG. 5 is a schematic view of a compact of the present invention;
fig. 6 is a structural schematic view of the locking disk of the present invention.
In the figure: 1. a liquid inlet valve body; 2. a blocking portion; 3. a drain valve body; 4. a liquid inlet interface; 5. a fluid infusion channel; 6. a valve bore; 7. a compression block; 8. a seal ring; 9. a liquid discharge conduit; 10. fixing the rod; 11. a locking disc; 12. a locking head; 13. a liquid discharge interface; 14. a valve core; 15. a spring; 16. a sewage draining outlet; 17. an inner cavity; 18. filtering the plate; 19. a trapway; 20. an inclined pressing block; 21. a drive rod; 22. a slider; 23. an annular chute; 24. a bevel; 25. positioning a groove; 26. and (4) locking the groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 6, the present invention provides a check valve with a multi-directional adjustable and controllable liquid outlet, which includes a liquid inlet valve body 1 and a liquid outlet valve body 3, wherein a blocking portion 2 for stably connecting the liquid inlet valve body 1 and the liquid outlet valve body 3 is connected between the liquid outlet valve body 3 and the liquid inlet valve body 1, and the blocking portion 2 is usually welded to both the liquid inlet valve body 1 and the liquid outlet valve body 3, so as to improve the connection stability. The internal sealing connection of flowing back valve body 3 has rotatable flowing back pipeline 9, and flowing back pipeline 9 is connected with the flowing back interface 13 that is used for connecting the external joint, and flowing back interface 13 is used for threaded connection in the external joint. The liquid discharge pipeline 9 is connected with a locking mechanism for locking and positioning the liquid discharge pipeline 9, the blocking part 2 is provided with a valve hole 6 for liquid circulation, the liquid discharge pipeline 9 is connected with a valve core 14 for blocking the valve hole 6, and the valve core 14 is of a spherical shape. One side of the blocking part 2 is connected with a positioning mechanism for limiting the valve core 14, the positioning mechanism comprises two pressing blocks 7, the pressing blocks 7 are symmetrically arranged about a symmetry axis, and the symmetry axis is B in the figure 1. The liquid discharge connector 13 can be pushed to move towards the liquid discharge valve body 3, so that the valve core 14 blocks the valve hole 6 of the blocking part 2, the liquid discharge connector 13 is directly rotated to realize the change of the liquid discharge direction, the connection with a pipeline is convenient, and the liquid discharge pipeline 9 is connected with a driving mechanism for driving the two pressing blocks 7 to approach or separate from each other;
when rotatory flowing back interface 13, case 14 is connected in valve opening 6, and case 14 links to each other with the constant head tank 25 that sets up in compact heap 7, actuating lever 21 promotes compact heap 7 and removes to the direction of case 14, make two compact heaps 7 lock the location to case 14, improve the stability of case 14, avoid when rotatory flowing back interface 13, high-pressure rivers spout from flowing back interface 13 in the feed liquor valve body 1, play the good effect that blocks, prevent the leakage of liquid, be convenient for to the use of check valve.
The positioning mechanism further comprises two inclined pressing blocks 20, the inclined pressing blocks 20 are connected to the pressing block 7, the pressing block 7 is connected with the blocking portion 2 in a sliding mode, the pressing block 7 can slide up and down along one side of the blocking portion 2, and the inclined pressing blocks are not prone to skew.
The driving mechanism comprises a sealing ring 8 and a driving rod 21, when the liquid drainage pipeline 9 is in a locking state, the sealing ring 8 is pressed on one side of the inner cavity 17, and liquid in the inner cavity 17 is prevented from leaking from the joint of the liquid drainage pipeline 9 and the liquid drainage valve body 3. The sealing ring 8 is connected to one end of the liquid discharge pipe 9, the sealing ring 8 is provided with an annular sliding groove 23, one end of the driving rod 21 is fixedly connected with a sliding block 22 which is slidably connected to the annular sliding groove 23, the other end of the driving rod is slidably connected with an inclined plane 24 which is arranged on the inclined pressing block 20, when the liquid discharge pipe 9 rotates, the sliding block 22 slides on the annular sliding groove 23, and meanwhile, the sliding block 22 is not separated from the annular sliding groove 23.
The locking mechanism comprises a fixing rod 10 and a locking disc 11, one end of the fixing rod 10 is connected to the liquid discharge valve body 3, the other end of the fixing rod is connected with a locking head 12, and the locking head 12 is matched with a locking groove 26 arranged on one side of the locking disc 11. After the drainage connector 13 is adjusted to a proper position, the drainage connector 13 is only required to be loosened, the drainage pipeline 9 is moved in the direction away from the drainage valve body 3 by the thrust exerted by the spring 15, the locking head 12 is locked on the locking disc 11, the drainage connector 13 is positioned, looseness is prevented, the stability of the drainage pipeline 9 is also guaranteed, and when the drainage connector 13 is rotated, the locking head 12 is separated from the locking groove 26.
The liquid discharge pipeline 9 is internally provided with a filter plate 18 for filtering liquid impurities, and the filter plate 18 can filter the impurities in the liquid to ensure the purity of the conveyed liquid.
A spring 15 for driving the valve element 14 to move toward the valve hole 6 is connected to the valve element 14, and one end of the spring 15 is connected to a filter plate 18.
An inner cavity 17 and a sewage discharge channel 19 are arranged in the liquid discharge valve body 3, the sewage discharge channel 19 is communicated with the inner cavity 17, a sewage discharge outlet 16 is formed in one end of the sewage discharge channel 19, a sealing cover used for sealing the sewage discharge outlet 16 is connected to the sewage discharge outlet 16, the sealing cover at the sewage discharge outlet 16 can be opened periodically, stains can be conveniently discharged along the sewage discharge channel 19, and the inside of the check valve can be cleaned conveniently.
A liquid conveying channel 5 and a liquid inlet interface 4 are arranged in the liquid inlet valve body 1, the liquid inlet interface 4, the liquid conveying channel 5 and the valve hole 6 are sequentially communicated, the liquid inlet interface 4 is connected with a joint of a water inlet pipe, and liquid is discharged from the liquid outlet interface 13 along the liquid inlet interface 4, the liquid conveying channel 5, the valve hole 6 and the liquid discharging pipeline 9.
The bottom of the cavity 17 is recessed toward the trapway 19 to prevent dirt from remaining in the bottom of the cavity 17 when the dirt is being expelled.
The included angle between the inclined surface 24 and the pressing block 7 is 40-60 degrees, and the included angle is C in figure 5.
The working principle is as follows: when the direction of the drainage interface 13 needs to be changed, the drainage interface 13 can be pushed to move towards the direction of the drainage valve body 3, the drainage interface 13 is connected to the end part of the drainage pipeline 9, meanwhile, a filter plate 18 for filtering liquid impurities is installed in the drainage pipeline 9, the valve core 14 is connected with a spring 15 for driving the valve core 14 to move towards the direction of the valve hole 6, one end of the spring 15 is connected with the filter plate 18, and then the valve hole 6 of the blocking part 2 is blocked by the valve core 14. And sealing ring 8 connects in drainage tube 9's one end, and sealing ring 8 is provided with annular chute 23, the one end and the sliding block 22 fixed connection in annular chute 23 of actuating lever 21, the other end sliding connection of actuating lever 21 is in the inclined plane 24 of sloping block 20 simultaneously, sloping block 20 connects in compact block 7, make two compact blocks 7 be close to the direction of case 14, the constant head tank 25 of two compact blocks 7 realizes the location to case 14, avoid when rotatory flowing back interface 13, high-pressure rivers spout from flowing back interface 13 in the feed liquor valve body 1, play and well block the effect, prevent the leakage of liquid. After the position of the liquid drainage interface 13 is determined, the liquid drainage interface 13 is loosened, the liquid drainage pipeline 9 moves towards the direction far away from the liquid drainage valve body 3 by the thrust exerted by the spring 15, and the locking head 12 is locked on the locking disc 11, so that the liquid drainage interface 13 is positioned, the looseness is prevented, and the stability of the liquid drainage pipeline 9 is also improved. In the use process of the one-way valve, the filter plate 18 can filter impurities in the conveyed liquid, the sealing cover at the sewage discharge outlet 16 is opened periodically, so that stains can be conveniently discharged along the sewage discharge channel 19, the interior of the one-way valve can be conveniently cleaned, and the cleanness of the one-way valve is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a but leakage fluid dram multidirectional regulation control's check valve which characterized in that: including feed liquor valve body (1), flowing back valve body (3), be connected with between flowing back valve body (3) and feed liquor valve body (1) and be used for feed liquor valve body (1) to be connected firm stop part (2) with flowing back valve body (3), sealing connection has rotatable drainage tube (9) in flowing back valve body (3), drainage tube (9) are connected with flowing back interface (13) that are used for connecting the external joint, drainage tube (9) are connected with the locking mechanism who is used for drainage tube (9) locking location, stop part (2) are provided with valve opening (6) that are used for the liquid circulation, drainage tube (9) are connected with case (14) that are used for plugging up valve opening (6), one side of stop part (2) is connected with and is used for spacing positioning mechanism of case (14), positioning mechanism includes two compact heap (7), drainage tube (9) are connected with and are used for driving two compact heap (7) actuating mechanism that are close to each other or separate each other (ii) a
When the liquid discharging interface (13) is rotated, the valve core (14) is connected with the valve hole (6), and the valve core (14) is connected with a positioning groove (25) arranged on the pressing block (7);
the positioning mechanism further comprises two inclined pressing blocks (20), the inclined pressing blocks (20) are connected to the pressing blocks (7), and the pressing blocks (7) are connected with the blocking parts (2) in a sliding mode;
actuating mechanism includes sealing ring (8), actuating lever (21), sealing ring (8) are connected in the one end of flowing back pipeline (9), and sealing ring (8) are provided with annular spout (23), the one end and the sliding block (22) of sliding connection in annular spout (23) of actuating lever (21) are fixed continuous, and the other end slides with inclined plane (24) that set up in barocline piece (20) and links to each other.
2. The one-way valve with a multi-directional adjustable and controllable drain outlet according to claim 1 is characterized in that the locking mechanism comprises a fixing rod (10) and a locking disc (11), one end of the fixing rod (10) is connected to the drain valve body (3), the other end of the fixing rod is connected with a locking head (12), the locking head (12) is matched with a locking groove (26) arranged on one side of the locking disc (11), and when the drain outlet (13) is rotated, the locking head (12) is separated from the locking groove (26).
3. A discharge outlet multi-way regulating and controlling one-way valve according to claim 1, characterized in that a filter plate (18) for filtering liquid impurities is arranged in the discharge pipeline (9).
4. A one-way valve with a drain port capable of multi-directional regulation and control according to claim 3, characterized in that the valve core (14) is connected with a spring (15) for driving the valve core (14) to move towards the valve hole (6), and one end of the spring (15) is connected with the filter plate (18).
5. A non-return valve with a drain port capable of being adjusted and controlled in multiple directions as claimed in claim 1, characterized in that an inner cavity (17) and a sewage draining channel (19) are arranged in the drain valve body (3), the sewage draining channel (19) is communicated with the inner cavity (17), and a sewage draining port (16) is arranged at one end of the sewage draining channel (19).
6. The check valve with the liquid outlet capable of being adjusted and controlled in multiple directions as claimed in claim 1, wherein a liquid feeding channel (5) and a liquid feeding port (4) are arranged in the liquid feeding valve body (1), and the liquid feeding port (4), the liquid feeding channel (5) and the valve hole (6) are sequentially communicated.
7. A drain spout multi-directionally adjustable and controllable check valve as claimed in claim 5, wherein the bottom of said interior chamber (17) is recessed toward the trapway (19).
8. The one-way valve with the drain port capable of being adjusted and controlled in multiple directions is characterized in that the included angle between the inclined surface (24) and the pressing block (7) is 40-60 degrees.
CN202111524882.8A 2021-12-14 2021-12-14 One-way valve with liquid discharge port capable of being adjusted and controlled in multiple directions Active CN113932048B (en)

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Application Number Priority Date Filing Date Title
CN202111524882.8A CN113932048B (en) 2021-12-14 2021-12-14 One-way valve with liquid discharge port capable of being adjusted and controlled in multiple directions

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Application Number Priority Date Filing Date Title
CN202111524882.8A CN113932048B (en) 2021-12-14 2021-12-14 One-way valve with liquid discharge port capable of being adjusted and controlled in multiple directions

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CN113932048B true CN113932048B (en) 2022-02-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204226753U (en) * 2014-10-20 2015-03-25 新昌县宏宇制冷有限公司 A kind of self-tightening steel ball type one-way valve
CN105972274A (en) * 2016-08-03 2016-09-28 氟络塞尔特种阀门(苏州)有限公司 Lift check valve
CN207034283U (en) * 2017-06-09 2018-02-23 盐城市大丰洪联铸钢有限责任公司 A kind of check-valves
CN207195756U (en) * 2017-09-01 2018-04-06 东莞市北泽五金科技有限公司 A kind of unidirectional fluid valve
CN207364351U (en) * 2017-07-28 2018-05-15 金华市宏昌电器有限公司 A kind of check valve
CN113309884A (en) * 2021-07-09 2021-08-27 张家港派恩信精密配件制造有限公司 Check valve for automobile air pipeline

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204226753U (en) * 2014-10-20 2015-03-25 新昌县宏宇制冷有限公司 A kind of self-tightening steel ball type one-way valve
CN105972274A (en) * 2016-08-03 2016-09-28 氟络塞尔特种阀门(苏州)有限公司 Lift check valve
CN207034283U (en) * 2017-06-09 2018-02-23 盐城市大丰洪联铸钢有限责任公司 A kind of check-valves
CN207364351U (en) * 2017-07-28 2018-05-15 金华市宏昌电器有限公司 A kind of check valve
CN207195756U (en) * 2017-09-01 2018-04-06 东莞市北泽五金科技有限公司 A kind of unidirectional fluid valve
CN113309884A (en) * 2021-07-09 2021-08-27 张家港派恩信精密配件制造有限公司 Check valve for automobile air pipeline

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