CN218780769U

CN218780769U - Gas pressure regulating valve group

Info

Publication number: CN218780769U
Application number: CN202223022672.1U
Authority: CN
Inventors: 魏宏阳; 于田; 叶爱媛; 李红丽
Original assignee: Henan Shangdie Valve Co ltd
Current assignee: Henan Shangdie Valve Co ltd
Priority date: 2022-11-15
Filing date: 2022-11-15
Publication date: 2023-03-31
Anticipated expiration: 2032-11-15

Abstract

The utility model discloses a gas pressure regulating valve group, which can effectively solve the problem of incomplete leakage detection of a gas pipeline; comprises a main valve, a self-closing valve and a gas valve which are arranged in sequence along the gas transmission direction in a gas pipeline; the self-closing valve comprises a shell with an air inlet and an air outlet and a valve cavity arranged in the shell, wherein a valve rod is arranged in the valve cavity in a sliding mode, and a diaphragm is arranged between the valve rod and the inner wall of the shell; the lower end of the valve rod is provided with an upper armature, and a permanent magnet is arranged below the upper armature. Has the advantages that: the detection process comprises the following steps: the main valve and the gas valve are closed, so that the self-closing valve and the gas pipeline form a closed pressure container with gas, if the gas pipeline leaks, the gas can be output from the leaking position, the gas in the self-closing valve and the gas pipeline is reduced, and the self-closing valve is closed; an operator can judge that the gas pipeline leaks by observing whether the valve rod extending out of the self-closing valve shell moves or not; the operation is simple and convenient, and only the main valve and the gas valve need to be closed.

Description

Gas pressure regulating valve group

Technical Field

The utility model relates to a coal gas pressure regulating valves belongs to the coal gas valve field.

Background

In daily life, some potential safety hazards exist when a household gas pipeline is used; sometimes, the pressure of a medium-pressure pipe network enters a user to cause the gas pressure to seriously exceed the standard. In addition, the rubber hose connected with the gas cooker is easy to age and break after long-term use, and the gas leakage is easy to cause great danger to users.

Therefore, in the practical use process, the gas self-closing valve which can be automatically closed in time when overpressure, underpressure, hose micro-leakage, hose falling and gas leakage occur to the gas of the household gas pipeline is very important, and the gas self-closing valve is one of indispensable important components on the household gas pipeline. However, the existing gas self-closing valve has no microleakage detection function, so that potential safety hazards of a gas pipeline in the actual use process are large.

The Chinese utility model patent with the publication number of CN203585480U comprises a micro-leakage detection control unit for controlling the on-off of the gas introduced into the valve body of the self-closing valve.

The device has a micro-leakage detection function, the gas cooker is closed firstly in the use process, then the gas introduced into the self-closing valve body is cut off through the micro-leakage detection control unit, and then the on-off state of the self-closing valve body is observed, so that whether micro-leakage points exist on a connecting pipeline between the gas self-closing valve body and the gas cooker can be judged.

However, the conventional household gas valve sets generally comprise three gas valve sets, namely a main valve, a self-closing valve and a gas valve which are arranged along the gas transmission direction in a gas pipeline; the device only has the function of detecting whether the gas pipeline between the self-closing valve and the gas valve leaks or not due to the truncation of the self-closing valve, and cannot detect whether the gas pipeline between the main valve and the self-closing valve leaks or not.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas pressure regulating valves can effectively solve the gas pipeline leak testing incomplete problem.

In order to solve the technical problem, the utility model discloses a realize through following technical scheme:

comprises a main valve, a self-closing valve and a gas valve which are arranged in sequence along the gas transmission direction in a gas pipeline; the self-closing valve comprises a shell with an air inlet and an air outlet and a valve cavity arranged in the shell, wherein a valve rod is arranged in the valve cavity in a sliding mode, and a diaphragm is arranged between the valve rod and the inner wall of the shell; the lower end of the valve rod is provided with an upper armature, a permanent magnet is arranged below the upper armature and fixed on an installation column, the lower end of the installation column is provided with an installation block, two sides of the installation block are hinged with extension arms, and one end of each extension arm is hinged with a push-pull rod; one of the push-pull rods extends out of the valve cavity from the air inlet of the shell, and a valve plate is arranged on the push-pull rod, wherein the diameter of the valve plate is larger than that of the air inlet.

And further: the diaphragm with be provided with the go-between the valve rod, the go-between upper end is provided with the spring, spring one end is fixed on the valve rod, the valve rod lower extreme is provided with the mounting panel that holds up the go-between, go up armature and install terminal surface under the mounting panel.

Further: mounting grooves are formed in two sides of the mounting block respectively, a rotating shaft is arranged in each mounting groove, and one end of each extending arm is fixed to the rotating shaft.

Further: a first limiting ring is further arranged in the valve cavity, and the push-pull rod is arranged in the first limiting ring in a sliding mode.

And further: the valve cavity is also provided with a second limiting ring, the second limiting ring is fixed on the inner wall of the shell, a limiting hole is formed in the middle of the second limiting ring, the mounting column and the mounting block are fixed together through a limiting rod, and the limiting rod is arranged in the limiting hole in a sliding mode.

Further: and a flow regulating valve is arranged on one side of the self-closing valve, and a pressure gauge is arranged at the flow regulating valve.

The beneficial effects are that:

the gas valve group of the device consists of a main valve, a self-closing valve and a gas valve, and the purpose of the device is mainly to detect whether a gas pipeline leaks; the detection process comprises the following steps: the main valve and the gas valve are closed, so that the self-closing valve and the gas pipeline form a closed pressure container with gas, if the gas pipeline leaks, the gas can be output from the leaking part, the gas in the self-closing valve and the gas pipeline is reduced, and the gas pressure is reduced; at the moment, the valve plate is closed by utilizing the fact that a diaphragm in the self-closing valve is reduced and contracted by gas pressure and is related to drive a valve rod to move; an operator can judge that the gas pipeline leaks by observing whether a valve rod extending out of the self-closing valve shell moves or not; the operation is simple and convenient, and only the main valve and the gas valve need to be closed.

When the leakage detection is carried out on the gas pipeline, the flow regulating valve is rotated to reduce the flowing area of the gas, but the pressure in the gas pipeline is unchanged, and the flow rate of the gas can be greatly increased; when a gas pipeline leaks, the gas in the self-closing valve can be discharged more quickly due to the large gas flow rate, so that the original detection time of 15 minutes is reduced to 5-10 minutes.

Drawings

For ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the open state of the self-closing valve of the present invention;

FIG. 3 is a schematic diagram of the self-closing valve after the gas pipeline of the present invention is leaked;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is a top view of the middle mounting block of the present invention.

Description of the reference numerals:

1. a gas pipeline; 2. a main valve; 3. a self-closing valve; 4. a gas valve; 5. a flow regulating valve; 6. a pressure gauge; 7. an air inlet; 8. an air outlet; 9. a housing; 10. a valve cavity; 11. a valve stem; 12. a membrane; 13. an upper armature; 14. a permanent magnet; 15. mounting a column; 16. mounting blocks; 17. extending the arm; 18. a push-pull rod; 19. a valve plate; 20. a connecting ring; 21. a spring; 22. mounting a plate; 23. mounting grooves; 24. a first limit ring; 25. a second stop collar; 26. a limiting rod.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1-5, an embodiment of a gas pressure regulating valve set of the present invention is shown,

comprises a main valve 2, a self-closing valve 3 and a gas valve 4 which are arranged in sequence along the gas transmission direction in a gas pipeline 1; the self-closing valve 3 comprises a shell 9 with an air inlet 7 and an air outlet 8 and a valve cavity 10 arranged in the shell 9, wherein a valve rod 11 is arranged in the valve cavity 10 in a sliding mode, and a diaphragm 12 is arranged between the valve rod 11 and the inner wall of the shell 9; an upper armature 13 is arranged at the lower end of the valve rod 11, a permanent magnet 14 is arranged below the upper armature 13, the permanent magnet 14 is fixed on an installation column 15, an installation block 16 is arranged at the lower end of the installation column 15, two sides of the installation block 16 are hinged with extension arms 17, and one end of each extension arm 17 is hinged with a push-pull rod 18; one of the push-pull rods 18 extends out of the valve chamber 10 from the air inlet 7 of the housing 9, and a valve plate 19 is arranged on the push-pull rod 18, the diameter of the valve plate 19 being larger than that of the air inlet 7.

The main valve 2 in the device is arranged in front of a gas flow meter in a gas pipeline 1 and is used for controlling the whole gas flow flowing into the room; the gas valve 4 is arranged at the outlet of the gas pipeline 1 in the gas stove, and the gas stove can be ignited to ignite to cook by opening the gas valve 4; the self-closing valve 3 is arranged between the main valve 2 and the gas valve 4.

This device is when carrying out the inspection to whole gas pipeline: firstly, keeping the self-closing valve 3 in an open state, closing a gas stove, closing the main valve 2, observing the valve rod 11 of the self-closing valve 3 after 15 minutes, if the valve rod 11 is not sucked back, the main pipeline is not leaked, and if the valve rod is sucked back, the indoor pipeline system is leaked.

The working principle of the self-closing valve 3 in the device is as follows:

the air inlet 7 of the self-closing valve 3 is connected with a metal pipe, one end of the metal pipe is communicated with a fuel gas pipeline, and the other end of the metal pipe is connected with the self-closing valve 3.

When gas enters the self-closing valve 3 from the metal pipe, the valve plate 19 abuts against the gas inlet 7, so that the gas cannot pass through the self-closing valve 3, and at the moment, the valve rod 11 is pulled, the valve rod 11 is lifted upwards, and the mounting block 16 connected with the valve rod 11 is driven to move upwards together; when the mounting block 16 moves upwards, the extending arms 17 hinged to the two sides of the mounting block 16 are driven to move, at this time, the extending arms 17 push the push-pull rod 18, the valve plate 19 originally pressed at the position of the air inlet 7 is pushed away by the push-pull rod 18, so that the air inlet 7 is opened, and gas enters the valve cavity 10 from the air inlet 7 to complete the opening of the self-closing valve 3.

After the self-closing valve 3 is opened, the gas can be rapidly filled into the valve cavity 10 of the self-closing valve 3 due to the relationship of air pressure, at this time, the gas can jack the diaphragm 12, and the diaphragm 12 can drive the valve rod 11 to move upwards, so that the self-closing valve 3 is kept opened all the time.

The detection of the gas pipeline 1 in the device is further explained according to the working principle of the self-closing valve 3 in the device:

firstly, the self-closing valve 3 is in an opening state, namely after the valve cavity 10 is filled with gas; the gas valve 4 and the main valve 2 are all closed, so that both ends of the gas pipeline 1 are all closed, and the self-closing valve 3 is equivalent to a gas channel when the gas pipeline 1 is not leaked; if the gas pipeline 1 leaks, the gas in the gas pipeline 1 moves towards the leaking direction, and along with the leakage of the gas, the gas pressure in the whole gas pipeline 1 and the gas pressure in the self-closing valve 3 gradually decrease, the high-pressure gas which is originally filled in the valve cavity 10 gradually runs off, the diaphragm 12 pushed open by the gas also falls back downwards along with the decrease of the gas quantity, at this time, the diaphragm 12 drives the valve rod 11 to move downwards, the downward movement of the valve rod 11 is opposite to the upward movement of the valve rod 11, and the upward movement of the valve rod 11 pushes the valve plate 19 away from the gas inlet 7 to open the self-closing valve 3; the valve rod 11 moves downwards to press the valve plate 19 on the air inlet 7 and close the self-closing valve 3;

after the self-closing valve 3 is closed, the gas pipeline 1 can be divided into two parts, one part is a pipeline between the self-closing valve 3 and the main valve 2, and the other part is a pipeline between the self-closing valve 3 and the gas valve 4; if the leakage of the gas pipeline 1 is only one of the two sections, the gas in the gas pipeline 1 can be prevented from completely leaking by using the device.

The main valve 2, the gas valve 4 and the flow regulating valve 5 in the device are common in the market, and the specific functions and structures are not described again; the flow regulating valve 5 can control the fixed cross-sectional area of the original gas pipeline 1;

when the leakage detection is carried out on the gas pipeline 1, the flow regulating valve 5 is rotated to reduce the flowing area of the gas, but the pressure in the gas pipeline 1 is unchanged, and the flow velocity of the gas is greatly increased; when the gas pipeline 1 leaks, the gas flow rate is high, so that the gas in the self-closing valve 3 can be discharged more quickly, and the original detection time of 15 minutes is reduced to 5-10 minutes; the detection time is shortened.

The reason why the number of the flow control valves 5 in the device is one and the flow control valves are arranged on the gas pipeline 1 between the self-closing valve 3 and the gas valve 4 is that according to practical experience, the possibility of leakage of the gas pipeline 1 between the self-closing valve 3 and the gas valve 4 is far higher than that of the gas pipeline 1 between the self-closing valve 3 and the main valve 2.

The pressure gauge 6 detects the pressure in the gas pipe 1, and whether the gas pipe 1 leaks can be roughly judged by using the display value of the pressure gauge 6.

Mounting grooves 23 are respectively formed in two sides of the mounting block 16, a rotating shaft is arranged in each mounting groove 23, and one end of each extending arm 17 is fixed on each rotating shaft.

The mounting groove 23 functions to provide a space for the boom 17 to rotate, and the rotation shaft functions to facilitate the boom 17 to rotate.

The valve cavity 10 is further provided with a first limit ring 24, and the push-pull rod 18 is slidably arranged in the first limit ring 24.

The first limit ring 24 is used for limiting the linear movement of the push-pull rod 18 and facilitating the control of the opening and closing of the valve plate 19.

The valve cavity 10 is further provided with a second limiting ring 25, the second limiting ring 25 is fixed on the inner wall of the housing 9, a limiting hole is formed in the middle of the second limiting ring 25, the mounting column 15 and the mounting block 16 are fixed together through a limiting rod 26, and the limiting rod 26 is slidably arranged in the limiting hole.

The second limit ring 25 is used for matching with the limit rod 26 to realize the linear lifting of the valve rod 11.

A connecting ring 20 is arranged between the diaphragm 12 and the valve rod 11, a spring 21 is arranged at the upper end of the connecting ring 20, one end of the spring 21 is fixed on the valve rod 11, a mounting plate 22 for supporting the connecting ring 20 is arranged at the lower end of the valve rod 11, and the upper armature 13 is mounted on the lower end surface of the mounting plate 22.

The upper armature 13 and the permanent magnet 14 are attracted together, so that the valve rod 11 controls the lifting of the mounting block 16.

The above description is only for the specific embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any person skilled in the art can make changes or modifications within the scope of the present invention.

Claims

1. The utility model provides a coal gas pressure regulating valves, the valves setting is on gas pipeline (1), its characterized in that: comprises a main valve (2), a self-closing valve (3) and a gas valve (4) which are arranged in sequence along the gas transmission direction in a gas pipeline (1); the self-closing valve (3) comprises a shell (9) with an air inlet (7) and an air outlet (8) and a valve cavity (10) arranged in the shell (9), wherein a valve rod (11) is arranged in the valve cavity (10) in a sliding mode, and a diaphragm (12) is arranged between the valve rod (11) and the inner wall of the shell (9); an upper armature (13) is arranged at the lower end of the valve rod (11), a permanent magnet (14) is arranged below the upper armature (13), the permanent magnet (14) is fixed on a mounting column (15), a mounting block (16) is arranged at the lower end of the mounting column (15), two sides of the mounting block (16) are hinged with extending arms (17), and one end of each extending arm (17) is hinged with a push-pull rod (18); one of the push-pull rods (18) extends out of the valve cavity (10) from the air inlet (7) of the shell (9), a valve plate (19) is arranged on the push-pull rod (18), and the diameter of the valve plate (19) is larger than that of the air inlet (7).

2. The gas pressure regulating valve group of claim 1, wherein: diaphragm (12) with be provided with between valve rod (11) go-between (20), go-between (20) upper end is provided with spring (21), spring (21) one end is fixed on valve rod (11), valve rod (11) lower extreme is provided with the support mounting panel (22) of go-between (20), install upper armature (13) terminal surface under mounting panel (22).

3. The gas pressure regulating valve block as claimed in claim 2, wherein: mounting block (16) both sides are provided with mounting groove (23) respectively, be provided with the pivot in mounting groove (23), it fixes to stretch out arm (17) one end in the pivot.

4. The gas pressure regulating valve block as claimed in claim 3, wherein: a first limiting ring (24) is further arranged in the valve cavity (10), and the push-pull rod (18) is arranged in the first limiting ring (24) in a sliding mode.

5. The gas pressure regulating valve group of claim 4, wherein: still be provided with second spacing ring (25) in valve pocket (10), second spacing ring (25) are fixed shell (9) inner wall, and second spacing ring (25) middle part is provided with spacing hole, erection column (15) with it is together fixed through a gag lever post (26) between installation piece (16), gag lever post (26) slide and set up in the spacing hole.

6. The gas pressure regulating valve group of claim 1, wherein: and a flow regulating valve (5) is arranged on one side of the self-closing valve (3), and a pressure gauge (6) is arranged at the flow regulating valve (5).