CN217842835U

CN217842835U - Gas self-closing valve

Info

Publication number: CN217842835U
Application number: CN202221573302.4U
Authority: CN
Inventors: 陈云康; 郭成
Original assignee: Kunshan Xinxinpeng Machinery Co ltd
Current assignee: Kunshan Xinxinpeng Machinery Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-11-18
Anticipated expiration: 2032-06-22

Abstract

The utility model provides a gas self-closing valve belongs to gas accessory technical field. The gas self-closing valve solves the problems that an existing gas self-closing valve is not easy to machine and the like. This gas self-closing valve includes the valve body, the valve gap, pull rod and plunger, the valve body has the air inlet, gas outlet and disk seat, the centre gripping has the diaphragm between valve gap and the valve body, the inner of pull rod passes the diaphragm and links firmly mutually with the diaphragm, the outer end of pull rod stretches out the valve gap and has linked firmly to carry and has turned round, the top of plunger has linked firmly magnet, the bottom of plunger has linked firmly sealed the pad, the iron plate that is located the diaphragm below has linked firmly in the valve body, iron plate has a plurality of gas passing hole, the plunger passes iron plate setting, the plunger cover is equipped with spring one, the upper end of spring one acts on iron plate, the lower extreme of spring one acts on sealed the pad, spring one provides elasticity and makes sealed pad keep in the trend sealed in gas passing hole. The utility model has the advantages of convenient processing, fast reaction speed, etc.

Description

Gas self-closing valve

Technical Field

The utility model belongs to the technical field of the gas accessory, in particular to gas self-closing valve.

Background

The gas self-closing valve is a device which is arranged on a low-pressure gas pipeline, does not need electric power or other external power when the gas supply pressure of the pipeline is under-pressure or over-pressure, and can be automatically closed and manually opened. The gas self-closing valve improves the safety of gas use.

For example, chinese patent literature discloses a pipeline gas self-closing valve [ application No.: 201921262272.3; authorization notice number: CN210196573U ], which comprises a valve body, a valve rod, an end cover and a plunger, wherein the valve body is provided with an air inlet and an air outlet, the valve body is internally provided with a division plate which divides an inner cavity of the valve body into an upper cavity and a lower cavity, the division plate is provided with an air vent which is communicated with the upper cavity and the lower cavity, the lower cavity is communicated with the air inlet, the upper cavity is communicated with the air outlet, a diaphragm which seals the upper cavity is clamped between the valve body and the end cover, the inner end of the valve rod penetrates through the middle part of the diaphragm and is fixedly connected with the diaphragm, the outer end of the valve rod penetrates out of the end cover and is connected with a lifting knob, the inner end of the valve rod adsorbs a magnet, a sealing gasket is embedded at the bottom of the plunger, the division plate is provided with a connecting seat which is arranged around the plunger and is in a cylindrical shape, the top of the connecting seat is fixedly connected with a metal retaining cap, the top of the plunger penetrates through the metal retaining cap and is fixedly connected with the magnet, and the connecting seat is provided with an air passing structure which is communicated with the upper cavity.

The pipeline gas self-closing valve can realize automatic closing under pressure or overpressure, but has high requirement on the machining precision of the connecting seat on the valve body, and threads need to be machined on the outer wall due to the integral structure of the connecting seat and the valve body, so that the machining difficulty is high, the defective rate is high, the plunger falls by self weight to realize plugging, and the reaction speed is not fast enough.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a gas self-closing valve convenient to processing, reaction rate is fast.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a gas self-closing valve, includes valve body, valve gap, pull rod and plunger, the valve body air inlet and gas outlet have, the valve body has in the valve body and hinders the disk seat of separating air inlet and gas outlet, the disk seat have vertical gas passing port that runs through with intercommunication air inlet and gas outlet, the valve gap link firmly the centre gripping between valve body top and valve gap and valve body and have the diaphragm, the inner of pull rod passes the diaphragm and links firmly mutually with the diaphragm, the outer end of pull rod stretches out the valve gap and has linked firmly the lifting button, the top of plunger has linked firmly magnet, the bottom of plunger has linked firmly sealed the pad, a serial communication port, the valve body in link firmly the iron plate that is located the diaphragm below, form the epicoele between iron plate and the diaphragm, form the lower chamber between iron plate and the gas outlet, iron plate has the gas passing hole of a plurality of intercommunication epicoele and lower chamber, the plunger passes the iron plate setting, the plunger cover be equipped with spring one, the upper end of spring acts on in the iron plate, the lower extreme of spring acts on the sealed pad, spring one provide elasticity and make sealed pad keep in the trend sealed in the gas passing port.

In the gas self-closing valve, the valve body is provided with a groove for embedding the outer edge of the iron plate, the compressed part of the diaphragm by the valve cover is abutted against the upper surface of the outer edge of the iron plate, and the inner edge of the iron plate for the plunger to penetrate through is provided with a cylindrical guide part which protrudes downwards.

In the gas self-closing valve, the outer end of the pull rod is sleeved with the second spring, the upper end of the second spring is abutted against the lifting knob, and the lower end of the second spring is abutted against the valve cover.

In the gas self-closing valve, the top of the valve cover is provided with an axially outwards protruding guide seat, the pull rod penetrates through the guide seat, the top of the guide seat is provided with a limiting groove, and the lower end of the second spring is positioned in the limiting groove.

In the gas self-closing valve, the guide seat is externally sleeved with a cylindrical sheath, and the sheath surrounds the lower half part of the lifting knob.

In the gas self-closing valve, the valve seat is provided with a plurality of guide sheets which are enclosed into a cylinder shape, the outer wall of the sealing gasket is in clearance fit with the inner wall of the guide sheets, and the valve seat is provided with a circle of convex rings which are protruded and are abutted by the sealing gasket.

In the gas self-closing valve, the magnet is annular, and a bolt penetrates through the magnet and is in threaded connection with the plunger.

In the gas self-closing valve, the lower end of the plunger is provided with an annular groove, the lower end of the plunger is inserted into the annular groove, and the sealing gasket is provided with an embedding part embedded into the annular groove.

In the gas self-closing valve, the gas inlet is internally provided with a flow limiting valve core.

In the gas self-closing valve, the valve body is provided with a ball valve for controlling the opening and closing of the gas outlet, and the gas outlet is connected with a screwed joint for pressing a sealing ring of the ball valve through internal threads.

Compared with the prior art, the gas self-closing valve has the advantages of reasonable structural design, convenient processing and manufacturing, high reaction sensitivity, good working stability and good use safety.

Drawings

FIG. 1 is a structural section view of the gas self-closing valve.

Fig. 2 is a partial structure schematic diagram of the gas self-closing valve.

Fig. 3 is a schematic structural diagram of the gas self-closing valve at the valve body.

In the figure, 1, a valve body; 1a, an air inlet; 1b, an air outlet; 1c, a valve seat; 1c1, a gas passing port; 1c2, a guide sheet; 1c3, convex ring; 2. a valve cover; 2a, a guide seat; 3. a pull rod; 4. a plunger; 5. a membrane; 6. lifting and twisting; 7. a magnet; 8. a gasket; 8a, an insertion portion; 9. an iron plate; 9a, air passing holes; 9b, a guide part; 10. a first spring; 11. a second spring; 12. a sheath; 13. a bolt; 14. a flow-limiting valve core; 15. a ball valve; 16. provided is a threaded joint.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the gas self-closing valve comprises a valve body 1, a valve cover 2, a pull rod 3 and a plunger 4, wherein the valve body 1 is provided with an air inlet 1a and an air outlet 1b, a valve seat 1c for blocking the air inlet 1a from the air outlet 1b is arranged in the valve body 1, the valve seat 1c is provided with an air through port 1c1 vertically penetrating to communicate the air inlet 1a with the air outlet 1b, the valve cover 2 is fixedly connected to the top of the valve body 1, a diaphragm 5 is clamped between the valve cover 2 and the valve body 1, the inner end of the pull rod 3 penetrates through the diaphragm 5 and is fixedly connected with the diaphragm 5, the outer end of the pull rod 3 extends out of the valve cover 2 and is fixedly connected with a lifting knob 6, the lifting knob 6 in the embodiment is provided with a buckling part buckled into an annular groove arranged at the outer end of the pull rod 3, so that the lifting knob 6 and the pull rod 3 are fixedly connected, and during actual manufacturing, a screw can penetrate through the lifting knob 6 and the pull rod 3 to fixedly connect the pull rod 3; and the riveting ring is riveted and coated at the joint of the valve body 1 and the valve cover 2, so that the valve cover 2 is fixedly connected with the valve body 1. The top of plunger 4 has linked firmly magnet 7, the bottom of plunger 4 has linked firmly sealed the pad 8, it is located the iron plate 9 of diaphragm 5 below to link firmly in the valve body 1, form the epicoele between iron plate 9 and the diaphragm 5, form the lower chamber between iron plate 9 and the gas outlet 1b, iron plate 9 has the air passing hole 9a of three intercommunication epicoele and lower chamber, plunger 4 passes the setting of iron plate 9, plunger 4 cover is equipped with spring one 10, the upper end of spring one 10 acts on iron plate 9, the lower extreme of spring one 10 acts on sealed pad 8, spring one 10 provides elasticity and makes sealed pad 8 keep in the trend sealed in air passing hole 1c 1.

The gas self-closing valve omits the prior connecting seat and metal blocking cap, does not need to process threads, and is convenient to process and manufacture; when the gas-water separation device is used, the knob 6 is held manually, so that the magnet 7 is adsorbed at the inner end of the pull rod 3, then the pull rod 3 drives the plunger 4 to move upwards by overcoming the elasticity of the first spring 10, the iron plate 9 plays a role in guiding the plunger 4, the plunger 4 moves smoothly and stably, the sealing gasket 8 is separated from the gas passing port 1c1, the gas passing port 1c1 is communicated with the gas inlet 1a and the gas outlet 1b, gas is discharged through the gas inlet 1a, the gas passing port 1c1 and the gas outlet 1b, the gas enters the upper cavity from the lower cavity and the gas passing port 9a, the gas pressure acts on the diaphragm 5, the stress of the diaphragm 5 is balanced, and the gas passing port 1c1 keeps a communicated state; when under-pressure occurs, the plunger 4 can rapidly descend due to the dead weight of the plunger 4, the elastic force of the first spring 10 and the adsorption force between the magnet 7 and the iron plate 9, and the sealing gasket 8 is sealed at the air passing port 1c1 to realize the self-closing under-pressure; when overpressure occurs, the fuel gas impacts the diaphragm 5 to enable the diaphragm 5 to bulge upwards, the lower end of the pull rod 3 is separated from the magnet 7, the plunger 4 is enabled to descend rapidly due to the dead weight of the plunger 4, the elastic force of the first spring 10 and the adsorption force between the magnet 7 and the iron plate 9, the sealing gasket 8 is sealed at the air vent 1c1, and overpressure self-closing is achieved; when the self-closing under pressure and overpressure is realized, the reaction speed of the self-closing is increased due to the arrangement of the first spring 10, the upper limit of the gas impact force borne by the sealing gasket 8 is increased due to the elasticity of the first spring 10, the sealing effect of the sealing gasket 8 is good, and the use safety is good.

In a further elaboration, the valve body 1 is provided with a groove for embedding the outer edge of the iron plate 9, the compressed part of the diaphragm 5, which is pressed by the valve cover 2, abuts against the upper surface of the outer edge of the iron plate 9, and the inner edge of the iron plate 9, through which the plunger 4 passes, is provided with a guide part 9b which protrudes downwards and is in a cylindrical shape, so that the iron plate 9 is convenient to install and position, the iron plate 9 cannot shake due to gas impact, the guide part 9b has good guidance for the plunger 4, the plunger 4 is smooth in displacement, and the working stability is good. The outer end cover of pull rod 3 is equipped with spring two 11, and the upper end of spring two 11 is contradicted in carrying and is turned round 6, and the lower extreme of spring two 11 is contradicted in valve gap 2, during the use, need press to carry and turn round 6 in order to overcome the elasticity of spring two 11 for pull rod 3 inner adsorption magnet 7 avoids the maloperation, in the use, even carry and turn round 6 and receive some external force impact, spring two 11 also plays the cushioning effect, avoids 3 whereabouts of pull rod and causes the self-imposed, and the stability in use is good.

The top of the valve cover 2 is provided with a guide seat 2a protruding outwards axially, the pull rod 3 penetrates through the guide seat 2a, the top of the guide seat 2a is provided with a limiting groove, and the lower end of the spring II 11 is positioned in the limiting groove, so that the pull rod 3 is guided by the guide seat 2a, the pull rod 3 is smooth in displacement, the spring II 11 is limited, and the working stability is good; the guide holder 2a overcoat has the sheath 12 that is the tube-shape, and including sheath 12 will carry the lower half that turns round 6 and surround, sheath 12 plays the guard action, avoids carrying to turn round 6 and locates impaired, also avoids dust, water stain to enter into guide holder 2a department, avoids the corrosion, has prolonged life.

The valve seat 1c is provided with a guide sheet 1c2 which is formed by three petals in a surrounding manner, the outer wall of the sealing gasket 8 is in clearance fit with the inner wall of the guide sheet 1c2, the valve seat 1c is provided with a circle of convex ring 1c3 which is protruded and is used for the sealing gasket 8 to abut against, the guide sheet 1c2 further improves the guidance, the sealing gasket 8 is smooth in displacement, the convex ring 1c3 has more effective contact area with the sealing gasket 8, and the sealing performance is good; the magnet 7 is annular, and a bolt 13 penetrates through the magnet 7 and is in threaded connection with the plunger 4, so that the magnet 7 is convenient and stable to connect; the lower end of the plunger 4 has an annular groove, the packing 8 is inserted by the lower end of the plunger 4 and the packing 8 has an insertion portion 8a inserted into the annular groove, so that the packing 8 and the plunger 4 are conveniently assembled and firmly connected.

The flow limiting valve core 14 is arranged in the air inlet 1a, the flow limiting valve core 14 is of an existing structure, a specific structure can be known from fig. 1, details are not repeated, the flow limiting valve core 14 plays a role in limiting flow, namely when the gas flow of the air inlet 1a is too large, the flow limiting valve core 14 is closed, and only when the gas flow of the air inlet 1a is lower than a set flow, the flow limiting valve core 14 is opened, so that the use safety is improved. Be equipped with the ball valve 15 that control gas outlet 1b opened and close on valve body 1, gas outlet 1b has the screwed joint 16 that compresses tightly the sealing ring that ball valve 15 has through female connection, through opening and close of ball valve 15 control gas outlet 1b, compact structure, convenient operation, screwed joint 16 is convenient for the pipe connection, and screwed joint 16 has the external screw thread in this embodiment, and during the actual manufacturing, screwed joint 16 can have the internal thread so that the pipe connection.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The gas self-closing valve comprises a valve body (1), a valve cover (2), a pull rod (3) and a plunger (4), wherein the valve body (1) is provided with an air inlet (1 a) and an air outlet (1 b), the valve body (1) is internally provided with a valve seat (1 c) for blocking the air inlet (1 a) and the air outlet (1 b), the valve seat (1 c) is provided with an air passing port (1 c 1) vertically penetrating to communicate the air inlet (1 a) and the air outlet (1 b), the valve cover (2) is fixedly connected to the top of the valve body (1) and between the valve cover (2) and the valve body (1) to clamp a diaphragm (5), the inner end of the pull rod (3) penetrates through the diaphragm (5) and is fixedly connected with the diaphragm (5), the outer end of the pull rod (3) extends out of the valve cover (2) and is fixedly connected with a lifting button (6), the top of the plunger (4) is fixedly connected with a magnet (7), the bottom of the plunger (4) is fixedly connected with a sealing gasket (8), the diaphragm (1) is characterized in that the inner end of the diaphragm (9) is fixedly connected with the iron plate (9) below the diaphragm (5), a plurality of the iron plate (9) and the iron plate (9) are communicated with an upper cavity (9), plunger (4) cover be equipped with spring (10), the upper end of spring (10) acts on iron plate (9), the lower extreme of spring (10) acts on sealed pad (8), spring (10) provide elasticity and make sealed pad (8) keep in the trend sealed in gas passing mouth (1 c 1).

2. Gas self-closing valve according to claim 1, wherein the valve body (1) has a groove for embedding the outer edge of the iron plate (9), the compressed part of the membrane (5) pressed by the valve cover (2) is abutted against the upper surface of the outer edge of the iron plate (9), and the inner edge of the iron plate (9) for the plunger (4) to pass through is provided with a guide part (9 b) which protrudes downwards and is in a cylindrical shape.

3. The gas self-closing valve according to claim 2, characterized in that a second spring (11) is sleeved at the outer end of the pull rod (3), the upper end of the second spring (11) is abutted against the lifting knob (6), and the lower end of the second spring (11) is abutted against the valve cover (2).

4. The gas self-closing valve according to claim 3, characterized in that the top of the valve cover (2) is provided with an axially convex guide seat (2 a), the pull rod (3) is arranged through the guide seat (2 a), the top of the guide seat (2 a) is provided with a limiting groove, and the lower end of the second spring (11) is positioned in the limiting groove.

5. Gas self-closing valve according to claim 4, wherein the guide seat (2 a) is externally sleeved with a cylindrical sheath (12), and the sheath (12) encloses the lower half part of the lifting knob (6).

6. Gas self-closing valve according to claim 5, wherein the valve seat (1 c) has a plurality of guide vanes (1 c 2) which are enclosed into a cylinder, the outer wall of the sealing gasket (8) is in clearance fit with the inner wall of the guide vanes (1 c 2), and the valve seat (1 c) has a ring of convex rings (1 c 3) which are protruded and are abutted by the sealing gasket (8).

7. Gas self-closing valve according to claim 6, wherein said magnet (7) is annular and a bolt (13) passes through the magnet (7) and is screwed to the plunger (4).

8. Gas self-closing valve according to claim 7, characterised in that the lower end of said plunger (4) has an annular groove, said gasket (8) being inserted by the lower end of the plunger (4) and the gasket (8) having an insert (8 a) inserted in the annular groove.

9. Gas self-closing valve according to claim 8, characterized in that a flow-limiting valve core (14) is arranged in the gas inlet (1 a).

10. The gas self-closing valve according to claim 9, wherein the valve body (1) is provided with a ball valve (15) for controlling the opening and closing of the gas outlet (1 b), and the gas outlet (1 b) is connected with a screwed joint (16) for pressing a sealing ring of the ball valve (15) through internal threads.