CN212960930U

CN212960930U - Gas pipeline detection valve structure

Info

Publication number: CN212960930U
Application number: CN202021588978.1U
Authority: CN
Inventors: 张泉; 孙青�; 唐雨润; 唐毅; 周毅恒; 宋承恩; 苗玉鹏; 叶颖
Original assignee: Nanchong Southwest Petroleum University Design And Research Institute Co ltd
Current assignee: Nanchong Southwest Petroleum University Design And Research Institute Co ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2021-04-13
Anticipated expiration: 2030-08-03

Abstract

The utility model relates to a pipeline gas valve equips the field, especially a can in time detect the gas pipeline pressure, and in time cut off the gas source gas pipeline detection valve structure, pressure control device slides in the scope of guide slot, and pressure control device includes the magnetic force component, attract each other between magnetic force component and the diaphragm and form magnetic attraction, and pressure control device realizes the switching through torsional spring lever drive air inlet closing system; wherein: when the gas pressure in the main shell is larger than the magnetic attraction force, the diaphragm is far away from the magnetic force component, and the pressure control device descends and drives the air inlet closing system to close the air inlet; when the gas pressure in the main shell is smaller than the magnetic attraction force, the diaphragm is close to the magnetic component, and the pressure control device descends and drives the air inlet closing system to close the air inlet. The utility model is particularly suitable for among the gas pipeline.

Description

Gas pipeline detection valve structure

Technical Field

The utility model belongs to the technical field of pipeline gas valve equipment and specifically relates to a gas pipeline check valve structure.

Background

With the development of society, gas has become a necessary fuel energy source for industry and life. However, in the process of using gas by residents, almost every day, various accidents of leakage, poisoning, fire catching or explosion occur, particularly, poisoning, fire catching or explosion accidents caused by slight leakage of gas or out-of-control pressure regulation of a gas pressure regulator, falling off and breakage of a flexible rubber hose and the like exist, harmony and stability of the society are seriously affected, and the existing gas pipeline detection valve often cannot accurately detect pressure and automatically close and cut off a gas source in time, so that the occurrence of gas leakage and fire explosion accidents is more difficult to prevent, and gas safety cannot be well guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a gas pipeline detection valve structure that can in time detect gas pipeline pressure to in time cut off the air supply is provided.

The utility model provides a technical scheme that its technical problem adopted is: the gas pipeline detection valve structure comprises a main shell provided with a gas inlet and a gas outlet, wherein a gas inlet closing system is arranged at the gas inlet, and the gas inlet closing system and the gas inlet are matched with each other to realize opening and closing; the air inlet closing system comprises a main shell, a pressure control device and a torsion spring lever, wherein a deformable diaphragm is arranged in the main shell, the diaphragm divides the main shell into two cavities which are isolated from each other, a pressure control device and a guide groove which is arranged in the vertical direction are arranged in one cavity, the pressure control device slides in the range of the guide groove, the pressure control device comprises a magnetic force component, the magnetic force component and the diaphragm are mutually attracted to form magnetic attraction, and the pressure control device drives the air inlet closing system to be opened and closed through the torsion spring lever; wherein:

when the gas pressure in the main shell is larger than the magnetic attraction force, the diaphragm is far away from the magnetic force component, and the pressure control device descends and drives the air inlet closing system to close the air inlet;

when the gas pressure in the main shell is smaller than the magnetic attraction force, the diaphragm is close to the magnetic component, and the pressure control device descends and drives the air inlet closing system to close the air inlet.

Further, including setting up the self-checking system on the main casing body, the self-checking system includes the pull rod of being connected with the diaphragm, and wherein, pull rod is pulled down under the state of closing the air inlet to let the magnetic attraction between diaphragm and the magnetic force component balance with gas pressure, when the pull rod fell down along with the diaphragm, then the pipeline had the microleakage.

Further, the pressure control device comprises a temperature control piece, when the temperature of the use environment exceeds a set value, the temperature control piece is automatically fused, and the pressure control device drives the air inlet closing system to close the air inlet.

Further, the air inlet closing system comprises closing glue, and the closing glue is matched with a closing opening at the air inlet to realize opening and closing.

Further, the magnetic member is a magnet.

Further, the safety switch structure is arranged at the switch valve body of the main shell, and the safety switch structure is matched with the closing nozzle of the switch valve body to realize opening and closing.

Furthermore, the safety switch structure comprises a switch cover, a switch membrane, a knob and a switch torsion bar, wherein the switch membrane is fixedly sealed at the opening end of the switch valve body through the switch cover, and the knob is closed through the switch torsion bar and the switch membrane.

Furthermore, the safety switch structure further comprises a gasket, a nut and a big head screw, wherein the big head screw is fixed at the central part of the switch diaphragm through the gasket and the nut.

Further, the starting device is arranged on the main shell and consists of a pull button, a return spring cover and a return spring. Wherein, one end of the reset spring is sleeved on the pull button, and the other end is sleeved on the reset spring cover.

Further, a filter screen is arranged at the air inlet.

The utility model has the advantages that: the utility model discloses combine the actual conditions in the gas pipeline gas transmission, the creative atress system who has found between magnetic force component and the diaphragm to and the power balance with gas pressure, and ingenious this power balance of utilization realizes the detection and the control to management pressure, promptly: when the gas pressure in the main shell is larger than the magnetic attraction force, the diaphragm is far away from the magnetic force component, and the pressure control device descends and drives the air inlet closing system to close the air inlet; when the gas pressure in the main shell is smaller than the magnetic attraction force, the diaphragm is close to the magnetic component, and the pressure control device descends and drives the air inlet closing system to close the air inlet. The mechanical balance system also well becomes the technical core of real-time monitoring, and has the advantages of detection accuracy, reaction timeliness and the like. The utility model is particularly suitable for among the gas pipeline.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Labeled as: the switch cover comprises a switch cover 1, a switch diaphragm 2, a gasket 3, a nut 4, a big head screw 5, a fixing screw 6, a knob 7, a switch torsion bar 8, a pull button 9, a return spring cover 10, a pull rod 11, a return spring 12, a fine adjustment cover 13, an adjusting spring 14, a fixing nut 15, a flat head screw 16, a cap-shaped gasket 17, a diaphragm 18, an upper cover 19, a ring riveting steel ring 20, an air inlet 21, a clamp spring 22, a filter screen 23, a flow control seat 24, a closing spring 25, a closing glue 26, a closing opening 27, a closing rod 28, a lever seat 29, a fixing pin 30, a positioning seat 31, a torsion spring lever 32, a temperature control piece 33, a guide groove 34, a screw 35, a magnetic component 36, a positioning gasket 37, a magnet seat 38, a main shell 39, a switch valve body 40.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

The gas pipeline detection valve structure shown in fig. 1 comprises a main shell 39 provided with an air inlet 21 and an air outlet 42, wherein an air inlet closing system is arranged at the air inlet 21, and the air inlet closing system and the air inlet 21 are mutually matched to realize opening and closing; a deformable diaphragm 18 is arranged in the main shell 39, the diaphragm 18 divides the main shell 39 into two isolated cavities, one of the two isolated cavities is provided with a pressure control device and a guide groove 34 arranged along the vertical direction, the pressure control device slides in the range of the guide groove 34, the pressure control device comprises a magnetic component 36, the magnetic component 36 and the diaphragm 18 are mutually attracted to form magnetic attraction, and the pressure control device drives the air inlet closing system to be opened and closed through a torsion spring lever 32; wherein: when the gas pressure in the main housing 39 is greater than the magnetic attraction force, the diaphragm 18 moves away from the magnetic member 36, the pressure control device lowers and drives the air inlet closing system to close the air inlet 21; when the gas pressure in the main housing 39 is less than the magnetic attraction force, the diaphragm 18 approaches the magnetic member 36, and the pressure control means lowers and drives the intake port closing system to close the intake port 21.

As the core of the present invention, the magnetic force member 36 and the diaphragm 18 attract each other to form a magnetic attraction force, and a force balance is established between the magnetic attraction force and the gas pressure, so that the magnetic attraction force also becomes a basis for detecting abnormal conditions such as gas pressure microleakage, overpressure, and underpressure. When the gas pressure in the main housing 39 is greater than the magnetic attraction force, the diaphragm 18 is away from the magnetic member 36, the pressure control device descends and drives the air inlet closing system to close the air inlet 21; when the gas pressure in the main housing 39 is less than the magnetic attraction force, the diaphragm 18 approaches the magnetic member 36, and the pressure control means lowers and drives the intake port closing system to close the intake port 21. In actual use, an actuating device arranged on the main housing 39 can be optionally added, and the actuating device is composed of a pull button 9, a return spring cover 10 and a return spring 12. Wherein, one end of the return spring 12 is sleeved on the pull button 9, and the other end is sleeved on the return spring cover 10, thereby realizing the opening and closing of the fuel gas.

In order to detect whether or not there is a gas leak in the pipe, it is preferable to adopt: including a self-test system provided on the main housing 39, the self-test system including a pull rod 11 connected to the diaphragm 18, wherein the pull rod 11 is pulled up in a state where the air inlet 21 is closed, thereby allowing magnetic attraction between the diaphragm 18 and the magnetic member 36 to be balanced with gas pressure, and when the pull rod 11 falls with the diaphragm 18, there is a slight leakage in the pipe. The micro-leakage detection utilizes the stress balance between the magnetic attraction and the gas pressure. When the leak occurs, since the air inlet 21 is closed, the pressure of the gas in the main housing 39 is slowly decreased, so that an unbalanced state occurs in which the magnetic attraction is greater than the pressure of the gas, and at this time, the diaphragm 18 is restored to its original state, so that the pull rod 11 falls down along with the diaphragm 18.

In order to also enable a corresponding shutdown when the ambient temperature exceeds a set value, the following options are selected: the pressure control device comprises a temperature control part 33, when the temperature of the use environment exceeds a set value, the temperature control part 33 is automatically fused, and the pressure control device drives the air inlet closing system to close the air inlet 21. The temperature control member 33 is automatically fused, so that the pressure control device drives the air inlet closing system to close the air inlet 21, and timely response to the temperature of the use environment exceeding the set value is realized.

In order to simplify the corresponding structure and further reduce the production and manufacturing costs, it is preferable that the air inlet closing system includes a closing rubber 26, and the closing rubber 26 is matched with a closing port 27 at the air inlet 21 to realize opening and closing. Generally, the magnetic member 36 is preferably a magnet.

In order to further ensure the cut-off of the gas source and thus the safe use, the following solution is preferred: including a safety switch structure provided at the switch valve body 40 of the main housing 39, which is engaged with the closing mouth 41 of the switch valve body 40 to open and close. In emergency, the closing nozzle 41 of the switch valve body 40 can be directly closed, so that the gas is cut off, the safety factor in use is further increased, and the safety of users is ensured. Generally, as shown in fig. 1, it is preferable that the safety switch structure includes a switch cover 1, a switch diaphragm 2, a knob 7, and a switch torsion bar 8, wherein the switch diaphragm 2 is fixed and sealed at an opening end of the switch valve body 40 by the switch cover 1, and the knob 7 closes the closing nozzle 41 through the switch torsion bar 8 and the switch diaphragm 2. Preferably, the safety switch structure further comprises a gasket 3, a nut 4 and a big head screw 5, wherein the big head screw 5 is fixed at the central part of the switch diaphragm 2 through the gasket 3 and the nut 4. Generally, in order to prevent the damage of the equipment caused by the small amount of impurities in the gas, it is preferable to provide a screen 23 at the gas inlet 21.

The utility model discloses a can effectually prevent that the pipeline gas from leaking a little, the superpressure, under-voltage, overtemperature and rubber tube drop, break the automatic safety device that the accident such as the gas super flow reveals, but wide application is in making the special relief valve series product of gas trade. When the gas leaks slightly, the gas can be found in time, and the micro-leakage is avoided; when the accidents of overpressure, underpressure, overtemperature and overflow leakage occur to the gas, the device can be automatically closed, the gas source is cut off, the gas leakage and fire explosion accidents are prevented, and the gas safety is ensured to the maximum extent. The utility model discloses technical advantage is very obvious, and market prospect is very wide.

Claims

1. Gas pipeline detection valve structure, including main casing body (39) that are provided with air inlet (21) and gas outlet (42), its characterized in that: an air inlet closing system is arranged at the air inlet (21), and the air inlet closing system and the air inlet (21) are matched with each other to realize opening and closing; a deformable diaphragm (18) is arranged in the main shell (39), the main shell (39) is divided into two isolated cavities by the diaphragm (18), a pressure control device and a guide groove (34) arranged in the vertical direction are arranged in one of the two cavities, the pressure control device slides in the range of the guide groove (34), the pressure control device comprises a magnetic force component (36), the magnetic force component (36) and the diaphragm (18) are mutually attracted to form magnetic attraction, and the pressure control device drives the air inlet closing system to open and close through a torsion spring lever (32); wherein:

when the gas pressure in the main shell (39) is larger than the magnetic attraction force, the diaphragm (18) is far away from the magnetic force component (36), the pressure control device descends and drives the air inlet closing system to close the air inlet (21);

when the gas pressure in the main shell (39) is smaller than the magnetic attraction force, the diaphragm (18) is close to the magnetic force component (36), and the pressure control device descends and drives the air inlet closing system to close the air inlet (21).

2. A gas line check valve structure as recited in claim 1, wherein: the self-checking system comprises a pull rod (11) connected with a diaphragm (18), wherein the pull rod (11) is pulled up in a state that an air inlet (21) is closed, so that the magnetic attraction force between the diaphragm (18) and a magnetic force component (36) is balanced with the gas pressure, and when the pull rod (11) falls along with the diaphragm (18), the pipeline has micro leakage.

3. A gas line check valve structure as recited in claim 1, wherein: the pressure control device comprises a temperature control piece (33), when the temperature of the use environment exceeds a set value, the temperature control piece (33) is automatically fused, and the pressure control device drives the air inlet closing system to close the air inlet (21).

4. A gas line check valve structure as claimed in claim 1, 2 or 3, wherein: the air inlet closing system comprises a closing glue (26), and the closing glue (26) is matched with a closing port (27) at the air inlet (21) to realize opening and closing.

5. A gas line check valve structure as claimed in claim 1, 2 or 3, wherein: the magnetic member (36) is a magnet.

6. A gas line check valve structure as claimed in claim 1, 2 or 3, wherein: the safety switch structure comprises a safety switch structure arranged at a switch valve body (40) of a main shell (39), and the safety switch structure is matched with a closing nozzle (41) of the switch valve body (40) to realize opening and closing.

7. A gas line check valve structure as recited in claim 6, wherein: the safety switch structure comprises a switch cover (1), a switch membrane (2), a knob (7) and a switch torsion bar (8), wherein the switch membrane (2) is fixedly sealed at the opening end of a switch valve body (40) through the switch cover (1), and the knob (7) is closed to a closing nozzle (41) through the switch torsion bar (8) and the switch membrane (2).

8. A gas line check valve structure as recited in claim 7, wherein: the safety switch structure further comprises a gasket (3), a nut (4) and a big head screw (5), wherein the big head screw (5) is fixed at the central part of the switch diaphragm (2) through the gasket (3) and the nut (4).

9. A gas line check valve structure as claimed in claim 1, 2 or 3, wherein: including setting up the starting drive on main casing body (39), starting drive comprises pull button (9), return spring lid (10) and reset spring (12), and wherein, reset spring (12) one end cover in pull button (9), the other end overlaps in return spring lid (10).

10. A gas line check valve structure as claimed in claim 1, 2 or 3, wherein: a filter screen (23) is arranged at the air inlet (21).