CN216923348U

CN216923348U - Gas self-closing valve

Info

Publication number: CN216923348U
Application number: CN202220718714.6U
Authority: CN
Inventors: 王志乐
Original assignee: Taizhou Tongyang Pipe Co ltd
Current assignee: Taizhou Tongyang Pipe Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-08
Anticipated expiration: 2032-03-30

Abstract

The utility model provides a gas self-closing valve, and belongs to the technical field of gas valves. The gas self-closing valve solves the problems that the safety and reliability of the existing gas self-closing valve are not high enough and the like. This gas self-closing valve includes the valve body, valve gap and valve rod, the fixing base has been linked firmly in the valve body, be equipped with the elevator in the fixing base, be equipped with the guide structure who plays the guide effect to the elevator on the fixing base, the top of elevator has linked firmly magnet, the elevator has two lamella symmetries and the opposite face is planar spacing portion, the spout that runs through to its bottom is all seted up one slope to two spacing portions, the notch of spout bottom is partial to the air inlet side, the inner of air inlet has the radial protruding ring that protrudes of round, a connecting rod passes the protruding ring in proper order, and pass the fixing base setting between the two spacing portions, the tip that the connecting rod is located the air inlet has linked firmly sealed the pad, the both sides of connecting rod all have the slide bar that is located corresponding spout. The utility model has the advantages of compact structure, good safety and reliability and the like.

Description

Gas self-closing valve

Technical Field

The utility model belongs to the technical field of gas valves, and particularly relates to a gas self-closing valve.

Background

The gas self-closing valve is installed on low-pressure gas pipeline, and when the gas supply pressure of the pipeline is under-pressure or over-pressure, it does not need electric power or other external power, and can be automatically closed and manually opened.

The applicant designs a movable double-sealing gas self-closing valve and applies for patent [ application number: 202122528894. X; authorization notice number: CN215861930U ], which comprises a valve body, a valve cap, a valve stem and a plunger, wherein the valve body has an air inlet and an air outlet, a partition board is arranged in the valve body and divides the inner cavity of the valve body into an upper cavity and a lower cavity, the partition board has an air passing hole for communicating the upper cavity and the lower cavity, the upper cavity is communicated with the air outlet, the lower cavity is communicated with the air inlet, a diaphragm for sealing the upper cavity is clamped between the valve body and the valve cap, the inner end of the valve stem passes through the middle part of the diaphragm and is fixedly connected with the diaphragm, the outer end of the valve stem passes through the valve cap and is connected with a handle, the partition board has a cylindrical support seat extending into the upper cavity, the support seat has a radial through air hole, the top of the support seat is fixedly connected with a metal plate, the bottom end of the plunger is fixedly connected with a sealing gasket, the top end of the plunger passes through the metal plate and is fixedly connected with a magnet, the valve body is provided with an opening and closing valve for controlling the air outlet to be opened and closed, the air inlet is connected with an inner hexagonal joint through an internal thread, the inner hexagonal joint is sleeved with a movable cap, the inner hexagonal connector is provided with a blocking shoulder, the loose joint cap is provided with a flange which is radially inwards convex, the flange is limited between the blocking shoulder and the end part of the valve body, the outer wall of the end part of the inner hexagonal connector in the loose joint cap is embedded with a sealing sleeve which is sealed on the inner wall of the loose joint cap, and the sealing sleeve is provided with an inwards flange which is coated on the end surface of the inner hexagonal connector and is an annular coating part.

The movable double-seal gas self-closing valve is compact in structure, the movable joint cap is convenient for connecting pipelines in a narrow space, operation is convenient, when a pressure regulating box connected with the gas inlet end fails in pressure stabilization and generates large overpressure, the gas with the large overpressure impacts the overflowing valve core, the valve core body of the overflowing valve can be reversely displaced, the gas with the large overpressure impacts the plunger to enable the plunger to move upwards, a gas channel is opened, gas leakage is caused, the sealing reliability of the plunger is not ideal enough, and potential safety hazards exist.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provide a gas self-closing valve with good safety and reliability.

The purpose of the utility model can be realized by the following technical scheme: a gas self-closing valve comprises a valve body, a valve cover and a valve rod, wherein a mounting cavity is arranged in the valve body, the valve body is provided with an air inlet and an air outlet which are communicated with the mounting cavity, the valve cover is fixedly connected with the valve body and seals the mounting cavity, a diaphragm is arranged between the valve cover and the valve body, the inner end of the valve rod penetrates through the diaphragm and is fixedly connected with the diaphragm, the outer end of the valve rod extends out of the valve cover and is connected with a handle, the gas self-closing valve is characterized in that a fixing seat in the mounting cavity is fixedly connected in the valve body, a lifting block is arranged in the fixing seat, a guide structure which plays a guide role in guiding the lifting block is arranged on the fixing seat, the top of the lifting block is fixedly connected with a magnet which is adsorbed with the inner end of the valve rod, the lifting block is provided with two limiting parts which are symmetrical and have opposite surfaces which are planes, the two limiting parts are respectively provided with a chute which is obliquely penetrated to the bottom of the sliding block, and a notch at the bottom of the sliding chute is deviated to the air inlet side, the inner end of the air inlet is provided with a circle of convex rings protruding inwards in the radial direction, a connecting rod sequentially penetrates through the convex rings and between the two limiting parts and penetrates through the fixing seat, the end part, located in the air inlet, of the connecting rod is fixedly connected with a sealing gasket, sliding rods located in corresponding sliding grooves are arranged on the two sides of the connecting rod, and when the sliding rods are located at the tops of the sliding grooves, the sealing gasket is sealed on the end faces of the convex rings.

In the above gas self-closing valve, the guide structure comprises a guide plate fixedly connected with the top of the fixing seat, the lifting block is provided with a cylindrical guide part vertically penetrating through the guide plate, and the magnet is fixedly connected with the top end of the guide part.

As another aspect, in the above gas self-closing valve, the guide structure includes vertical guide surfaces on inner walls of two sides of the fixing seat, the outer walls of two sides of the lifting block have engaging portions protruding and engaging with the vertical guide surfaces, and the top of the fixing seat has a shoulder protruding and allowing the engaging portions to abut against. Vertical spigot surface and laminating portion cooperation are in order to play the guide effect, and the vertical displacement of lifter block is smooth and easy and steady, keeps off the shoulder and plays limiting displacement, and laminating portion is contradicted when keeping off the shoulder, and the lifter block can not continue to rise, avoids the lifter block to break away from the fixing base.

In the above-mentioned gas self-closing valve, the connecting rod has a plurality of supporting rib plates which are uniformly distributed in the circumferential direction and supported on the inner wall of the convex ring.

In the gas self-closing valve, the outer wall of the end part of the connecting rod extending out of the convex ring is provided with a circle of annular groove, the sealing gasket is coated on the end part of the connecting rod and provided with a covered edge embedded in the annular groove, and the end face of the convex ring facing to the side of the covered edge is provided with a circle of annular convex shoulder.

In the above gas self-closing valve, the magnet is annular and embedded in a metal pad, and a bolt passes through the magnet and the metal pad and is in threaded connection with the lifting block.

In the gas self-closing valve, the valve body is provided with a joint communicated with the inner end of the gas outlet, and the joint is in threaded connection with a plug.

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 an inner hexagon nut for compressing a sealing ring of the ball valve through an internal thread. The opening and closing of the air outlet are controlled through the ball valve, the structure is compact, the operation is convenient, the arrangement of the inner hexagon nut changes the connecting mode of the air outlet which is connected through the joint in the past, the leakage point of the air outlet is reduced, and the safety and reliability are improved.

In the gas self-closing valve, the valve body is provided with an overflowing valve core in the gas inlet, the outer shell of the overflowing valve core is provided with a circle of convex rings protruding outwards in the radial direction, and the inner wall of the gas inlet is provided with an annular groove for embedding the convex rings. Therefore, the assembly of the overflowing valve core and the air inlet is realized, the original inner hexagonal joint and loose joint cap are omitted, the leakage point of the air inlet is reduced, and the safety and reliability are improved.

Compared with the prior art, the gas self-closing valve has the advantages of compact structure, less leakage points, good working stability, good safety and reliability, and can still keep a sealing state under the condition of large overpressure.

Drawings

Fig. 1 is a three-dimensional structure view of the gas self-closing valve.

FIG. 2 is a transverse cross-sectional view of the present gas self-closing valve.

FIG. 3 is a longitudinal cross-sectional view of the present gas self-closing valve.

FIG. 4 is a schematic structural diagram of the installation cavity of the gas self-closing valve.

FIG. 5 is an assembly structure diagram of a fixed seat, a lifting block and a connecting rod in the gas self-closing valve.

FIG. 6 is an assembly structure view of the fixing seat and the lifting block in the gas self-closing valve.

In the figure, 1, a valve body; 2. a valve cover; 3. a valve stem; 4. an air inlet; 5. an air outlet; 6. a membrane; 7. a handle; 8. a fixed seat; 9. a lifting block; 91. a limiting part; 92. a chute; 93. a guide portion; 10. a magnet; 11. a convex ring; 12. a connecting rod; 121. a slide bar; 122. a support rib plate; 13. a gasket; 131. edge covering; 14. a guide plate; 15. a metal pad; 16. a bolt; 17. a joint; 18. a plug; 19. a ball valve; 20. a hexagon socket nut; 21. an over-flow valve core; 211. and (4) convex rings.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3, 4, 5 and 6, the gas self-closing valve comprises a valve body 1, a valve cover 2 and a valve rod 3, wherein a mounting cavity is arranged in the valve body 1, the valve body 1 is provided with an air inlet 4 and an air outlet 5 which are communicated with the mounting cavity, the valve cover 2 is fixedly connected with the valve body 1 and seals the mounting cavity, a diaphragm 6 is arranged between the valve cover 2 and the valve body 1, the inner end of the valve rod 3 penetrates through the diaphragm 6 and is fixedly connected with the diaphragm 6, the outer end of the valve rod 3 extends out of the valve cover 2 and is connected with a handle 7, a fixed seat 8 positioned in the mounting cavity is fixedly connected in the valve body 1 through screws, a lifting block 9 is arranged in the fixed seat 8, a guide structure which guides the lifting block 9 is arranged on the fixed seat 8, the top of the lifting block 9 is fixedly connected with a magnet 10 which is used for being adsorbed with the inner end of the valve rod 3, the lifting block 9 is provided with two limiting parts 91 which are symmetrical and the opposite surfaces are planar, and two limiting parts 91 are provided with a chute 92 which obliquely penetrates through the bottom, the notch of spout 92 bottom is partial to air inlet 4 side, and the inner of air inlet 4 has the protruding collar 11 of radial interior convex of a circle, and a connecting rod 12 passes between protruding collar 11, two spacing portions 91 in proper order and passes fixing base 8 setting, and the tip that connecting rod 12 is arranged in air inlet 4 links firmly sealed the pad 13, and the both sides of connecting rod 12 all have the slide bar 121 that is arranged in corresponding spout 92, and when slide bar 121 was arranged at the top of spout 92, sealed the pad 13 sealed in the terminal surface of protruding collar 11.

When the gas self-closing valve is used, the handle 7 is lifted to drive the valve rod 3 to vertically ascend, the valve rod 3 drives the lifting block 9 to vertically ascend under the magnetic action of the magnet 10, the guide structure plays a role in guiding, the lifting block 9 smoothly and stably ascends, in the ascending process of the lifting block 9, the sliding rod 121 slides along the sliding groove 92, namely, the lifting block 9 can push the connecting rod 12 to axially displace towards the side of the gas inlet 4 through the sliding groove 92, the sealing gasket 13 is separated from the end face of the convex ring 11, gas entering the gas inlet 4 passes through the convex ring 11, the installation cavity is used for exhausting gas from the gas outlet 5, and the gas self-closing valve is in an opening state. When under-pressure occurs, the pressure difference between the air inlet 4 and the air outlet 5 overcomes the magnetic force of the magnet 10, the self weight of the lifting block 9 and the pressure of the air outlet 5 can enable the lifting block 9 to vertically descend, the sliding groove 92 drives the sliding rod 121 to displace towards the air outlet 5 side, namely the connecting rod 12 axially displaces towards the air outlet 5 side, and the sealing gasket 13 of the connecting rod 12 is sealed on the end face of the convex ring 11, so that the closing purpose is achieved; when overpressure occurs, the pressure of the air inlet 4 impacts the sealing gasket 13 and the diaphragm 6, the lifting block 9 vertically descends, the sliding groove 92 is matched with the sliding rod 121 to enable the connecting rod 12 to axially displace towards the air outlet 5 side, the sealing gasket 13 of the connecting rod 12 is sealed on the end face of the convex ring 11, and the closing purpose is achieved, in particular, even if the overpressure occurs, the pressure of the air inlet 4 is extremely high, the sealing gasket 13 on the connecting rod 12 is always sealed on the end face of the convex ring 11 under the influence of the pressure, the closing effectiveness is guaranteed, the air outlet of the air outlet 5 is stopped, and the use safety is guaranteed; therefore, the gas self-closing valve can effectively close the gas channel when under-pressure, overpressure and large overpressure occur, and has good safety and reliability.

Further saying, guide structure includes that the guide plate 14 that the screw had been linked firmly in 8 tops of fixing base in this embodiment, and the screw passes guide plate 14, fixing base 8 and is connected with valve body 1, and elevator 9 has and is cylindricly and vertically passes guide plate 14's guide part 93, and magnet 10 links firmly on the top of guide part 93. The cooperation of deflector 14 and guide part 93 is in order to play the guide effect, and the vertical displacement of elevator 9 is smooth and easy and steady, and deflector 14 plays limiting displacement moreover, avoids elevator 9 to break away from fixing base 8.

The connecting rod 12 is provided with four supporting rib plates 122 which are uniformly distributed in the circumferential direction and supported on the inner wall of the convex ring 11, the supporting rib plates 122 are matched with the inner wall of the convex ring 11 to play a guiding role, the axial displacement of the connecting rod 12 is stable, gas passes through the supporting rib plates 122, and the gas enters the installation cavity smoothly; the outer wall of the end part of the connecting rod 12, extending out of the convex ring 11, is provided with a circle of annular groove, the sealing gasket 13 is coated on the end part of the connecting rod 12, the sealing gasket 13 is provided with an edge covering 131 embedded in the annular groove, the end face of the convex ring 11, facing the edge covering 131 side, is provided with a circle of annular convex shoulder, the sealing gasket 13 and the connecting rod 12 are good in connection firmness, the edge covering 131 is used for sealing the annular convex shoulder, and the sealing effect is good.

The magnet 10 is annular and embedded in a metal pad 15, and a bolt 16 penetrates through the magnet 10 and the metal pad 15 and is in threaded connection with the lifting block 9, so that the magnet 10 and the lifting block 9 are good in connection firmness and good in use stability; the valve body 1 is provided with a joint 17 communicated with the inner end of the air outlet 5, the joint 17 is in threaded connection with a plug 18, when the gas pressure measuring valve is used, the plug 18 is taken down, the joint 17 is used for being connected with a pressure measuring meter, whether gas leaks or not can be detected, and the gas pressure measuring valve is convenient to detect.

During actual manufacturing, the valve body 1 is provided with a ball valve 19 for controlling the opening and closing of the air outlet 5, and the air outlet 5 is connected with an inner hexagonal nut 20 for compressing a sealing ring of the ball valve 19 through internal threads; the valve body 1 is provided with an overflow valve core 21 in the air inlet 4, the outer shell of the overflow valve core 21 is provided with a circle of convex rings 211 which protrude outwards in the radial direction, and the inner wall of the air inlet 4 is provided with an annular groove for embedding the convex rings 211.

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 utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A gas self-closing valve comprises a valve body (1), a valve cover (2) and a valve rod (3), wherein a mounting cavity is formed in the valve body (1), the valve body (1) is provided with an air inlet (4) and an air outlet (5) which are communicated with the mounting cavity, the valve cover (2) is fixedly connected with the valve body (1) and seals the mounting cavity, a diaphragm (6) is arranged between the valve cover (2) and the valve body (1), the inner end of the valve rod (3) penetrates through the diaphragm (6) and is fixedly connected with the diaphragm (6), the outer end of the valve rod (3) extends out of the valve cover (2) and is connected with a handle (7), the gas self-closing valve is characterized in that a fixing seat (8) which is positioned in the mounting cavity is fixedly connected with the valve body (1), a lifting block (9) is arranged in the fixing seat (8), a guide structure which plays a guide role in guiding the lifting block (9) is arranged on the fixing seat (8), and a magnet (10) which is fixedly connected with the inner end of the valve rod (3) for adsorption, the lifting block (9) is provided with two symmetrical limiting parts (91) with opposite planes being planar, each limiting part (91) is provided with a sliding groove (92) which is obliquely penetrated to the bottom of the limiting part, a groove opening at the bottom of the sliding groove (92) is deviated from the side of the air inlet (4), the inner end of the air inlet (4) is provided with a circle of radial inward convex ring (11), one connecting rod (12) sequentially penetrates through the convex ring (11) and the two limiting parts (91) and penetrates through the fixing seat (8) to be arranged, the end part of the connecting rod (12) positioned in the air inlet (4) is fixedly connected with a sealing gasket (13), the two sides of the connecting rod (12) are provided with sliding rods (121) positioned in the corresponding sliding grooves (92), and when the sliding rods (121) are positioned at the tops of the sliding grooves (92), the sealing gasket (13) is sealed on the end faces of the convex rings (11).

2. A gas self-closing valve according to claim 1, wherein the guiding structure comprises a guiding plate (14) fixedly connected to the top of the fixing seat (8), the lifting block (9) has a cylindrical guiding portion (93) vertically penetrating through the guiding plate (14), and the magnet (10) is fixedly connected to the top end of the guiding portion (93).

3. The gas self-closing valve according to claim 1, wherein the guide structure comprises vertical guide surfaces arranged on the inner walls of the two sides of the fixing seat (8), the outer walls of the two sides of the lifting block (9) are provided with joint parts protruding out and jointed with the vertical guide surfaces, and the top of the fixing seat (8) is provided with a retaining shoulder protruding out and used for the joint parts to abut against.

4. A gas self-closing valve according to claim 1, 2 or 3, wherein said connecting rod (12) has a plurality of supporting ribs (122) which are circumferentially distributed and supported on the inner wall of said protruding ring (11).

5. A gas self-closing valve according to claim 4, characterized in that the outer wall of the end of the connecting rod (12) extending out of the convex ring (11) is provided with a ring-shaped groove, the sealing gasket (13) is coated on the end of the connecting rod (12) and the sealing gasket (13) is provided with a covered edge (131) embedded in the ring-shaped groove, and the end surface of the convex ring (11) facing to the covered edge (131) is provided with a ring-shaped convex shoulder.

6. A gas self-closing valve according to claim 5, wherein the magnet (10) is annular and embedded in a metal gasket (15), and a bolt (16) passes through the magnet (10) and the metal gasket (15) and is in threaded connection with the lifting block (9).

7. A gas self-closing valve according to claim 6, characterized in that the valve body (1) is provided with a joint (17) communicated with the inner end of the gas outlet (5), and the joint (17) is in threaded connection with a plug (18).

8. The gas self-closing valve according to claim 7, characterized in that the valve body (1) is provided with a ball valve (19) for controlling the opening and closing of the gas outlet (5), and the gas outlet (5) is connected with an inner hexagonal nut (20) for compressing a sealing ring of the ball valve (19) through an internal thread.

9. The gas self-closing valve according to claim 8, characterized in that the valve body (1) is provided with an overflow valve core (21) in the gas inlet (4), the outer shell of the overflow valve core (21) is provided with a circle of convex rings (211) protruding outwards in the radial direction, and the inner wall of the gas inlet (4) is provided with an annular groove for embedding the convex rings (211).