CN219413641U

CN219413641U - Gas shut-off valve easy and convenient to operate

Info

Publication number: CN219413641U
Application number: CN202320331618.0U
Authority: CN
Inventors: 胡友益; 陈剑力
Original assignee: Kunshan Yungzian Gas Equipment Co ltd
Current assignee: Kunshan Yungzian Gas Equipment Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-07-25
Anticipated expiration: 2033-02-28

Abstract

The utility model discloses a gas shut-off valve which is simple and convenient to operate, and is applied to a gas shut-off valve technology, and the technical scheme is as follows: the gas cutting device comprises a pull rod coaxially arranged with the vent valve, a sealing component for sealing the vent valve port is fixedly arranged at one end of the pull rod, a first quick connecting piece is fixedly arranged at the other end of the pull rod, one end, close to the first quick connecting piece, of the valve body is fixedly connected with a sealing cover in a locking manner, and a second quick connecting piece matched with the first quick connecting piece to realize locking is fixedly arranged on the outer cover surface of the sealing cover; the method has the technical effects that: the resetting of the fuel gas cut-off valve can be realized without using special tools, and the operation is simple and convenient.

Description

Gas shut-off valve easy and convenient to operate

Technical Field

The utility model relates to the technical field of fuel gas shut-off valves, in particular to a fuel gas shut-off valve which is simple and convenient to operate.

Background

The gas shut-off valve is a novel safety matching device for gas pipeline engineering, and is mainly used for the following occasions: when the pressure in the pipeline is monitored to be higher than or lower than a preset monitoring pressure value, the fuel gas cut-off valve automatically cuts off the combustible gas in the pipeline, so that the gas pressure in the pipeline is prevented from continuously increasing or the gas in the pipeline is prevented from leaking accidentally and largely, and danger is prevented.

At present, the Chinese patent with publication number of CN115126913A discloses a safe cut-off valve with wide application conditions, which comprises an upper membrane cover, a lower membrane cover, a valve clack, a pull rod, a cut-off spring, a steel ball bushing, steel balls, a diaphragm, a membrane bushing, a steel ball bushing reset spring, a decompression adjusting spring, an overpressure adjusting spring and a straight-through pipe joint, wherein the pull rod is provided with a pull rod boss, the membrane bushing is provided with a membrane bushing boss, and the action of the cut-off valve is realized by the cooperation of a plurality of springs through rolling of steel balls.

The existing safety cut-off valve has the advantages that the spring force is not always acted on the steel balls by arranging the springs, so that acting force between the steel balls and the valve body is reduced, friction between the valve rod and the valve body is indirectly reduced, however, the safety cut-off valve is complex in structure, particularly when the gas cut-off valve needs to be reset after gas is cut off, a sealing cover is required to be detached firstly, then a special tool is fixed at one end of a pull rod, the pull rod is pulled to be reset in one direction, if the corresponding tool is absent, the reset of the gas cut-off valve is difficult to realize only by manpower, the operation is not convenient enough, and the space for improvement is provided.

Disclosure of Invention

The utility model aims to provide a gas shut-off valve which is simple and convenient to operate, and has the advantages that the gas shut-off valve can be reset without using a special tool, and the operation is simple and convenient.

The technical aim of the utility model is realized by the following technical scheme: the gas shut-off valve is characterized by comprising a valve body, wherein a gas input port and a gas output port are respectively formed in the valve body machine, a vent valve port is fixedly arranged between the gas input port and the gas output port, a gas shut-off device for closing the vent valve port when the gas pressure is abnormal is fixedly arranged in the valve body, and a pressure sensing pipeline for communicating the gas output port and the gas shut-off device is also formed in the valve body; the gas cutting device comprises a pull rod coaxially arranged with the vent valve, a sealing assembly for sealing the vent valve port is fixedly arranged at one end of the pull rod, a first quick connecting piece is fixedly arranged at the other end of the pull rod, one end, close to the first quick connecting piece, of the valve body is fixedly connected with a sealing cover in a locking mode, and a second quick connecting piece matched with the first quick connecting piece to realize locking is fixedly arranged on the outer cover surface of the sealing cover.

The utility model is further provided with: the sealing cover comprises a threaded connection part which is locked and connected to the valve body based on a threaded coaxial center and a sealing cover which is fixedly connected to the threaded connection part and used for abutting against the end part of the valve body, and the second quick connecting piece is fixedly arranged at one end of the sealing cover, which is far away from the threaded connection part.

The utility model is further provided with: the first quick connector and the second quick connector are in locking connection based on threads, and the distance between the second quick connector protruding out of the outer end face of the sealing cover is greater than the distance between the upper end face of the first quick connector and the inner end face of the sealing cover in a gas cutting-off state.

The utility model is further provided with: the outer side wall of the sealing cover is uniformly provided with a plurality of arc-shaped holding blocks which are convenient to hold along the circumferential direction.

The utility model is further provided with: the utility model discloses a pull rod, including pull rod, valve body, pressure sensing pipeline, clamping sleeve, holding groove, clamping sleeve is fixed to be equipped with on the valve body with the coaxial setting of pull rod, the clamping assembly is fixed set up in the clamping assembly on the valve body, the involucra with form sealed pressure sensing chamber between the valve body, pressure sensing pipeline is connected to the pressure sensing chamber, involucra top is fixed to be equipped with the pressure sensing spring, bottom mounting is equipped with the clamping block, simultaneously the fixed joint sleeve that is equipped with on the valve body with the coaxial setting of pull rod, evenly the interval activity is equipped with a plurality of clamping balls along the circumferencial direction on the clamping sleeve, the holding groove has been seted up on the clamping block, the clamping groove has been seted up on the pull rod.

The utility model is further provided with: the sealing assembly comprises a propping plate fixedly arranged on the pull rod and a valve clack sleeved on the propping plate and used for sealing the ventilation valve port, a cutting spring is sleeved between the propping plate and the clamping sleeve, and the valve clack and the ventilation valve port are coaxially arranged.

The utility model is further provided with: the valve clack comprises a closed ring which is used for being abutted against the ventilation valve port, and a sealing gasket is embedded in the closed ring in a coaxial manner.

In summary, the utility model has the following beneficial effects:

1. the gas shut-off valve is characterized in that a first quick connecting piece is fixedly arranged at one end of the pull rod, a second quick connecting piece is fixedly arranged on the sealing cover, the first quick connecting piece and the second quick connecting piece are locked and connected based on threads, when the gas shut-off valve is cut off and needs to be reset, the sealing cover is only required to be unscrewed from the valve body, the sealing cover is inverted, the second quick connecting piece is rotationally locked on the first quick connecting piece, the butt joint can be realized, at the moment, the reset of the pull rod can be realized only by pulling the sealing cover, a special tool is not required, the operation is simple and convenient, and after the reset is finished, the sealing cover is only required to be continuously locked and connected on the valve body;

2. the clamping assembly is provided with the leather diaphragm and the pressure sensing spring is arranged at the top end of the leather diaphragm, a part of fuel gas output from the fuel gas output port enters the pressure sensing cavity through the pressure sensing pipeline, when the fuel gas pressure exceeds the set pressure of the pressure sensing spring, the leather diaphragm automatically rises to drive the clamping block to rise, the clamping ball can enter the accommodating groove after the fuel gas pressure exceeds a certain height, the clamping ball cannot be continuously clamped in the clamping groove, the cutting spring resets to drive the sealing assembly to move downwards to seal the ventilation valve port, so that the transmission of fuel gas is prevented, the cutting is rapid, and the cutting effect is good.

Drawings

Fig. 1 is a schematic overall structure of the present embodiment;

FIG. 2 is a top view of the overall structure of the present embodiment;

FIG. 3 is a cross-sectional view of the structure of FIG. 2 taken along the direction A-A;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

FIG. 5 is a cross-sectional view of the structure of FIG. 2 taken along the B-B direction;

fig. 6 is a schematic structural view of the seal cover of the present embodiment.

Reference numerals: 1. a valve body; 11. a gas input port; 12. a gas outlet; 13. a vent valve port; 14. a pressure sensing pipeline; 15. sealing cover; 151. a threaded connection; 152. a cover; 153. a second quick connector; 154. an arc-shaped holding block; 2. a gas shutoff device; 21. a pull rod; 22. a closure assembly; 221. an abutting plate; 222. a valve flap; 223. cutting off the spring; 224. a closed loop; 225. a sealing gasket; 23. a first quick connector; 24. a clamping assembly; 241. a coating film; 242. a pressure sensing cavity; 243. a pressure-sensitive spring; 244. a clamping block; 245. a clamping sleeve; 246. a clamping ball; 247. a receiving groove; 248. and a clamping groove.

Detailed Description

The present utility model will be described in further detail with reference to the accompanying drawings.

Examples:

referring to fig. 1, a gas shut-off valve with simple and convenient operation comprises a valve body 1, wherein a gas input port 11 and a gas output port 12 are respectively arranged on the valve body 1, a ventilation valve port 13 is fixedly arranged between the gas input port 11 and the gas output port 12, the gas enters the gas input port 11 and finally is output from the gas output port 12 through the ventilation valve port 13, a gas shut-off device 2 for closing the ventilation valve port 13 when the gas pressure is abnormal is fixedly arranged in the valve body 1, the abnormal gas pressure comprises overpressure or underpressure, namely, the pressure of the gas exceeds or is lower than a set pressure, meanwhile, a pressure sensing pipeline 14 which is communicated with the gas output port 12 and the gas shut-off device 2 is also arranged on the valve body 1, and a gas part output from the gas output port 12 enters the gas shut-off device 2 for pressure detection.

Referring to fig. 2 to 5, specifically, the gas shutoff device 2 includes a pull rod 21 coaxially disposed with the ventilation valve port 13, a closing component 22 for closing the ventilation valve port 13 is fixedly disposed at one end of the pull rod 21, a first quick connector 23 is fixedly disposed at the other end of the pull rod, one end of the valve body 1, which is close to the first quick connector 23, is in locking connection with a sealing cover 15, and a second quick connector 153, which is matched with the first quick connector 23 to realize locking, is fixedly disposed on the outer cover surface of the sealing cover 15. In this embodiment, the first quick connector 23 and the second quick connector 153 are in locking connection based on threads, but the locking connection between the first quick connector 23 and the second quick connector 153 can only be realized through threads, when the gas shut-off valve is cut off and needs to be reset, the sealing cover 15 is only required to be unscrewed from the valve body 1, the sealing cover 15 is inverted, the second quick connector 153 is rotationally locked on the first quick connector 23 to realize the butt joint, at the moment, the reset of the pull rod 21 can be realized by only pulling the sealing cover 15, no special tool is required, the operation is simple and convenient, and after the reset is completed, the sealing cover 15 is only required to be continuously locked and connected on the valve body 1.

Referring to fig. 1 and 6, specifically, the sealing cover 15 includes a threaded connection portion 151 that is locked and connected to the valve body 1 based on a threaded coaxial center, and a cover 152 that is fixedly connected to the threaded connection portion 151 and is used for abutting against an end portion of the valve body 1, and the second quick connector 153 is fixedly disposed at an end of the cover 152 that is far away from the threaded connection portion 151, and in order to ensure that the first quick connector 23 and the second quick connector 153 can be smoothly connected in a cut-off state, that is, when the pull rod 21 is in a retracted state, the distance that the quick connector 153 protrudes out of the cover 152 is greater than the distance that the upper end face of the first quick connector 23 is away from the inner end face of the cover 152 in a gas cut-off state, and a plurality of arc-shaped holding blocks 154 that are convenient to hold are uniformly disposed on an outer side wall of the cover 152 along a circumferential direction, and when the sealing cover 15 is detached from or installed on the valve body 1, the arc-shaped holding blocks 154 can help to be detached and installed.

Referring to fig. 2 to 5, specifically, a clamping assembly 24 for clamping the pull rod 21 is fixedly arranged in the middle of the pull rod 21, a coating 241 is fixedly arranged on the valve body 1 by the clamping assembly 24, a sealed pressure sensing cavity 242 is formed between the coating 241 and the valve body 1, the pressure sensing pipeline 14 is connected to the pressure sensing cavity 242, a part of fuel gas output from the fuel gas output port 12 enters the pressure sensing cavity 242 through the pressure sensing pipeline 14, a pressure sensing spring 243 is fixedly arranged at the top end of the coating 241, a clamping block 244 is fixedly arranged at the bottom end, a plurality of clamping balls 246 are movably arranged on the valve body 1 at intervals along the circumferential direction uniformly, a containing groove 247 is formed on the clamping block 244, a clamping groove 248 is formed on the pull rod 21, the clamping balls 246 are clamped in the clamping groove 248 on the pull rod 21 so as to prevent the pull rod 21 from moving downwards when the fuel gas is in a normal conveying state, when the gas pressure exceeds the set pressure of the pressure sensing spring 243, the film 241 automatically rises to drive the clamping block 244 to rise, after the film rises to a certain height, the clamping ball 246 enters the accommodating groove 247, the clamping ball 246 cannot be continuously clamped in the clamping groove 248, the cut-off spring 223 resets to drive the sealing assembly 22 to move downwards to seal the ventilation valve port 13 so as to prevent the transmission of gas, the cut-off is rapid, the cut-off effect is good, when the reset is needed, the gas pressure in the pressure sensing cavity 242 is firstly lower than the set pressure of the pressure sensing spring 243, then the sealing cover 15 is connected with the pull rod 21, then the pull rod 21 is pulled to balance the pressure at two ends of the gas input valve and the gas output valve, the reset is completed after the pull rod 21 does not continuously fall, and finally the sealing cover 15 is reinstalled on the valve body 1.

Referring to fig. 2 to 5, specifically, the closing assembly 22 includes an abutting plate 221 fixedly disposed on the pull rod 21 and a valve clack 222 sleeved on the abutting plate 221 for closing the ventilation valve port 13, a cutting spring 223 is sleeved between the abutting plate 221 and the clamping sleeve 245, the valve clack 222 and the ventilation valve port 13 are coaxially disposed, the valve clack 222 includes a closing ring 224 for abutting the ventilation valve port 13, and a sealing gasket 225 is coaxially embedded in the closing ring 224. In this embodiment, the membrane 241 is made of nitrile rubber (NBR) and nylon cloth, the valve flap 222 is made of nitrile rubber (NBR) and brass, and the shut-off valve is divided into two types of high pressure and low pressure according to the pressure class, and the structural principle is the same, except that the size and thickness of the pressure-bearing membrane 241 are different.

The use process is briefly described: when the gas pressure exceeds the set pressure of the pressure sensing spring 243, the film 241 automatically rises to drive the clamping block 244 to rise, the clamping ball 246 enters the accommodating groove 247 after the gas pressure rises to a certain height, the clamping ball 246 cannot be continuously clamped in the clamping groove 248, the cut-off spring 223 resets to drive the sealing assembly 22 to move downwards to seal the ventilation valve port 13 so as to prevent the gas transmission, when the gas pressure in the pressure sensing cavity 242 is lower than the set pressure of the pressure sensing spring 243, the sealing cover 15 is connected with the pull rod 21, the pull rod 21 is pulled to balance the pressure at two ends of the gas input valve and the gas output valve until the pull rod 21 does not continuously fall, and finally the sealing cover 15 is reinstalled on the valve body 1.

The present embodiment is only for explanation of the present utility model and is not to be construed as limiting the present utility model, and modifications to the present embodiment which may creatively contribute to the present utility model as required may be made by those skilled in the art after reading the present specification, but are protected by patent laws within the scope of claims of the present utility model.

Claims

1. The utility model provides a gas shut-off valve easy and fast to operate, includes valve body (1), gas input port (11) and gas delivery outlet (12) have been seted up respectively on valve body (1), gas input port (11) with fixedly between gas delivery outlet (12) be equipped with vent valve port (13), valve body (1) internal fixation is equipped with and is used for sealing when gas pressure is unusual gas shut-off device (2) of vent valve port (13), still set up on valve body (1) intercommunication gas delivery outlet (12) and pressure sensing pipeline (14) of gas shut-off device (2); the gas cutting device is characterized in that the gas cutting device (2) comprises a pull rod (21) which is coaxially arranged with the ventilation valve port (13), a closing component (22) for closing the ventilation valve port (13) is fixedly arranged at one end of the pull rod (21), a first quick connecting piece (23) is fixedly arranged at the other end of the pull rod, one end, close to the first quick connecting piece (23), of the valve body (1) is fixedly connected with a sealing cover (15), and a second quick connecting piece (153) which is matched with the first quick connecting piece (23) to realize locking is fixedly arranged on the outer cover surface of the sealing cover (15).

2. The gas shut-off valve according to claim 1, wherein the sealing cover (15) comprises a threaded connection portion (151) which is connected to the valve body (1) in a locking manner based on the screw thread coaxial center and a sealing cover (152) which is fixedly connected to the threaded connection portion (151) and is used for abutting against the end portion of the valve body (1), and the second quick connection member (153) is fixedly arranged at one end of the sealing cover (152) which is far away from the threaded connection portion (151).

3. The gas shut-off valve according to claim 2, wherein the first quick connector (23) and the second quick connector (153) are in locking connection based on threads, and the distance that the second quick connector (153) protrudes out of the outer end face of the sealing cover (152) is greater than the distance that the upper end face of the first quick connector (23) is away from the inner end face of the sealing cover (152) in the gas shut-off state.

4. The fuel gas shut-off valve according to claim 2, wherein a plurality of arc-shaped holding blocks (154) which are convenient to hold are uniformly arranged on the outer side wall of the sealing cover (152) along the circumferential direction.

5. The gas shut-off valve according to claim 1, characterized in that the middle position of the pull rod (21) is fixedly provided with a clamping assembly (24) for clamping the pull rod (21), the clamping assembly (24) is fixedly arranged on a coating film (241) on the valve body (1), a sealed pressure sensing cavity (242) is formed between the coating film (241) and the valve body (1), the pressure sensing pipeline (14) is connected to the pressure sensing cavity (242), the top end of the coating film (241) is fixedly provided with a pressure sensing spring (243), the bottom end of the coating film is fixedly provided with a clamping block (244), meanwhile, the valve body (1) is fixedly provided with a clamping sleeve (245) which is coaxially arranged with the pull rod (21), a plurality of clamping balls (246) are movably arranged on the clamping sleeve (245) at intervals along the circumferential direction, the clamping block (244) is provided with a containing groove (247), and the pull rod (21) is provided with a clamping groove (248).

6. The gas shut-off valve according to claim 5, wherein the closing assembly (22) comprises a contact plate (221) fixedly arranged on the pull rod (21) and a valve clack (222) sleeved on the contact plate (221) for closing the ventilation valve port (13), a shut-off spring (223) is sleeved between the contact plate (221) and the clamping sleeve (245), and the valve clack (222) and the ventilation valve port (13) are coaxially arranged.

7. The fuel gas shut-off valve with simple and convenient operation according to claim 6, wherein the valve clack (222) comprises a closed ring (224) for abutting against the ventilation valve port (13), and a sealing gasket (225) is embedded and connected in the closed ring (224) coaxially.