CN218644876U

CN218644876U - Gas pipeline self-closing valve

Info

Publication number: CN218644876U
Application number: CN202223301548.9U
Authority: CN
Inventors: 李爽; 吴晓南; 苏要港; 廖柏睿
Original assignee: Southwest Petroleum University
Current assignee: Southwest Petroleum University
Priority date: 2022-12-05
Filing date: 2022-12-05
Publication date: 2023-03-17
Anticipated expiration: 2032-12-05

Abstract

The utility model relates to a gas pipeline self-closing valve belongs to self-closing valve technical field, including the valve body, the fixed intercommunication in left side of valve body has the screw thread inlet tube. The utility model discloses, when gas negative pressure or superpressure reachd a definite value, the overhead piston or the lower piston of connecting cylinder department can drive the inside that spacing fixture block extrusion spacing spring income release link, spacing fixture block can reset under spacing spring's elastic action behind the spacing fixture block of rethread and block overhead piston or lower piston, make the division board can be by the shutoff, make the valve body can be sealed to prevent that the gas from passing through, thereby can carry out the self-closing under the condition that does not use magnet and seal, it is difficult to the discovery to prevent that magnet from ageing, make the self-closing valve can not seal under gas pipeline superpressure negative pressure state, there is the problem of potential safety hazard.

Description

Gas pipeline self-closing valve

Technical Field

The utility model relates to a self-closing valve technical field especially relates to a gas pipeline self-closing valve.

Background

The self-closing valve for gas pipeline, abbreviated as self-closing valve, is installed on the pipeline of low-pressure gas system, when the gas supply pressure of the pipeline is under-pressure or over-pressure, it can be automatically closed and needs to be manually opened without electricity or other external power.

Through retrieval, the traditional Chinese patent with the publication number of CN207634703U discloses a gas pipeline self-closing valve, wherein a valve core is abutted into a valve body after water is absorbed by a water-absorbing resin ball, so that an air hole is blocked, the purpose of cutting off a gas pipeline is realized, and the problem of gas leakage is avoided.

The technical scheme has the following defects that the self-closing valve structure is difficult to seal a gas pipeline when overpressure occurs and difficult to reset after sealing, so that the self-closing valve structure is inconvenient to use.

In view of this, the present invention is intended to improve and solve the above problems, and to provide a technical solution which is reasonable in design and can effectively improve the above drawbacks, by careful research and application in combination with the theory.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a gas pipeline self-closing valve has solved the problem that above-mentioned background art provided, prevents that self-closing valve inner wall magnet aging failure and outside are difficult to perceive, has the problem of potential safety hazard, and is convenient for reset after self-sealing, reuse.

The utility model provides a scheme as follows of above-mentioned technical problem: the utility model provides a gas pipeline self-closing valve, includes the valve body, the fixed intercommunication in left side of valve body has the screw inlet pipe, the fixed intercommunication in right side of valve body has the outlet duct, the inner wall swivelling joint of outlet duct has the ball valve, the top fixedly connected with knob of ball valve, the inner wall of valve body is close to bottom edge fixedly connected with diaphragm, the intermediate position fixedly connected with link of diaphragm, the bottom of link is close to four corners edge fixedly connected with bracing piece, the bottom fixedly connected with overhead piston of bracing piece, the bottom fixedly connected with connecting cylinder of overhead piston, the bottom fixedly connected with lower piston of connecting cylinder, the inner wall intermediate position fixedly connected with division board of valve body, the inner wall bottom fixedly connected with gag lever post of valve body, the outer wall cover of gag lever post is equipped with reset spring, the equal threaded connection in both sides of division board is close to the right side of valve body has the release lever, both sides the equal sliding connection in left side of release lever has spacing fixture block, the spacing spring of outer wall of spacing fixture block.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, the bottoms of the upper piston, the connecting cylinder and the lower piston are provided with sliding holes matched with the limiting rod, and the inner wall of each sliding hole is connected with the limiting rod in a sliding manner.

Furthermore, the top of the return spring is fixedly connected with the lower piston.

Furthermore, the top of the partition board is close to the edge of the left side and is provided with a vent hole, and the two sides of the inner wall of the vent hole are provided with clamping grooves matched with the upper piston and the lower piston.

Furthermore, one side of each of the two sides, back to back, of each of the limiting clamping blocks is of a tangent plane structure, and a limiting groove is formed in the adjacent side.

Further, the outer wall of release link is provided with connecting thread, just the right side of valve body set up with the screw hole of release link looks adaptation, the junction cover of release link and valve body is equipped with the rubber sealing ring.

Further, the right side fixedly connected with anticreep piece of spacing fixture block, the sliding tray with anticreep piece looks adaptation is seted up in the left side of release link, and the inner wall and the anticreep piece sliding connection of sliding tray.

Furthermore, the middle position of the top of the diaphragm is provided with a mounting hole matched with the connecting frame, and the inner wall of the mounting hole is fixedly connected with the connecting frame.

The utility model provides a gas pipeline self-closing valve has following advantage:

1. when the gas negative pressure or overpressure reaches a certain value, the upper piston or the lower piston at the connecting cylinder can drive the limiting clamping block to extrude the limiting spring to be contained in the reset rod, and then the limiting clamping block can reset under the elastic action of the limiting spring to clamp the upper piston or the lower piston through the limiting clamping block behind the limiting clamping block, so that the partition plate can be blocked, the valve body can be sealed to prevent gas from passing through, the self-closing sealing can be performed under the condition that a magnet is not used, the phenomenon that the magnet is aged difficultly can be avoided, the self-closing valve cannot be sealed in the overpressure and negative pressure state of a gas pipeline, and the problem of potential safety hazards exists;

2. when the reset is needed, the reset rod only needs to be screwed out, so that the limiting clamping block can be separated from the upper piston or the lower piston, the upper piston or the lower piston can reset under the elastic action of the reset spring, and the reset and reuse can be conveniently carried out after the automatic sealing.

The above description is only an outline of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented in accordance with the content of the specification, the following detailed description will be given of preferred embodiments of the present invention in conjunction with the accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic structural view of a gas pipeline self-closing valve according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a gas pipeline in a sealing state of a self-closing valve according to an embodiment of the present invention;

fig. 3 is a front view of a gas pipeline self-closing valve according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a reset rod in a gas pipeline self-closing valve according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a valve body; 2. a threaded inlet pipe; 3. an air outlet pipe; 4. a ball valve; 5. a knob; 6. a membrane; 7. a connecting frame; 8. a support bar; 9. a piston is arranged on the piston; 10. a connecting cylinder; 11. a piston is arranged below; 12. a partition plate; 13. a limiting rod; 14. a return spring; 15. a reset lever; 16. a limiting clamping block; 17. and a limiting spring.

Detailed Description

The principles and features of the present invention will be described with reference to the accompanying fig. 1-4, which are provided for illustration only and are not intended to limit the scope of the invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-4, a gas pipeline self-closing valve, including a valve body 1, the fixed intercommunication in left side of valve body 1 has threaded inlet tube 2, the fixed intercommunication in right side of valve body 1 has outlet duct 3, the inner wall swivelling joint of outlet duct 3 has ball valve 4, the top fixedly connected with knob 5 of ball valve 4, the inner wall of valve body 1 is close to bottom edge fixedly connected with diaphragm 6, the intermediate position fixedly connected with link 7 of diaphragm 6, the bottom of link 7 is close to four corners edge fixedly connected with bracing piece 8, the bottom fixedly connected with overhead piston 9 of bracing piece 8, the bottom fixedly connected with connecting cylinder 10 of overhead piston 9, the bottom fixedly connected with of connecting cylinder 10 puts piston 11 down, the inner wall intermediate position fixedly connected with division board 12 of valve body 1, the inner wall bottom fixedly connected with gag lever 13 of valve body 1, the outer wall cover of gag lever 13 is equipped with reset spring 14, the both sides equal threaded connection of right side of valve body 1 close to division board 12 has reset rod 15, the left side equal sliding connection of both sides reset rod 15 has spacing fixture block 16, the outer wall cover of spacing fixture block 16 is equipped with spacing spring 17.

Preferably, the bottoms of the upper piston 9, the connecting cylinder 10 and the lower piston 11 are all provided with sliding holes matched with the limiting rod 13, and the inner walls of the sliding holes are connected with the limiting rod 13 in a sliding manner.

Preferably, the top of the return spring 14 is fixedly connected to the lower piston 11.

Preferably, the top of the partition plate 12 is provided with a vent hole near the left edge, and the two sides of the inner wall of the vent hole are provided with clamping grooves matched with the upper piston 9 and the lower piston 11.

Preferably, the opposite sides of the two side limiting fixture blocks 16 are tangent plane structures, and the adjacent side is provided with a limiting groove.

Preferably, the outer wall of the reset rod 15 is provided with connecting threads, the right side of the valve body 1 is provided with a threaded hole matched with the reset rod 15, and a sealing rubber ring is sleeved at the joint of the reset rod 15 and the valve body 1.

Preferably, the right side of the limiting clamping block 16 is fixedly connected with an anti-falling block, the left side of the reset rod 15 is provided with a sliding groove matched with the anti-falling block, and the inner wall of the sliding groove is connected with the anti-falling block in a sliding manner.

Preferably, the middle position of the top of the diaphragm 6 is provided with a mounting hole matched with the connecting frame 7, and the inner wall of the mounting hole is fixedly connected with the connecting frame 7.

The utility model discloses a concrete theory of operation and application method do: the valve body 1 can be connected with an air inlet pipeline through a threaded inlet pipe 2, the valve body can be discharged from an air outlet pipe 3 after penetrating through a vent hole in a partition plate 12, the ball valve 4 can be manually sealed through rotating a knob 5, the diaphragm 6 can drive the connecting frame 7 to lift when negative pressure or overpressure occurs in the gas pipeline, the upper piston 9 and the lower piston 11 which are connected through a support rod 8 can lift, when the negative pressure or the overpressure of the gas reaches a certain value, the upper piston 9 or the lower piston 11 in the connecting cylinder 10 can extrude a reset spring 14 on the outer wall of a limiting rod 13 to lift, the limiting clamping block 16 can be driven to extrude the limiting spring 17 to be contained in a reset rod 15 in the lifting process, the upper piston 9 or the lower piston 11 can be reset and clamped through a limiting clamping block 16 after the limiting clamping block 16, the partition plate 12 can be blocked under the elastic action of the limiting spring 17, the valve body 1 can be sealed to prevent the gas from passing through, the reset rod 15 only needs to rotate when the reset block 16, the limiting clamping block can be separated from the upper piston 9 or the lower piston 11, the upper piston 9 or the lower piston 11 can enable the gas to be elastically reset by the reset spring 14, and the valve body 1 can be reset through the reset spring 14.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; all the persons skilled in the art can smoothly implement the present invention as shown in the attached drawings and described above; however, those skilled in the art should understand that the equivalent embodiments of the present invention are equivalent embodiments of the present invention, and that the changes, modifications and evolutions made by the above-disclosed technical contents are not departed from the technical scope of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a gas pipeline self-closing valve, includes valve body (1), its characterized in that: a threaded inlet pipe (2) is fixedly communicated with the left side of the valve body (1), the right side of the valve body (1) is fixedly communicated with an air outlet pipe (3), the inner wall of the air outlet pipe (3) is rotatably connected with a ball valve (4), the top of the ball valve (4) is fixedly connected with a knob (5), the inner wall of the valve body (1) close to the bottom edge is fixedly connected with a diaphragm (6), the middle position of the diaphragm (6) is fixedly connected with a connecting frame (7), the bottom of the connecting frame (7) is fixedly connected with supporting rods (8) near the edges of the four corners, the bottom of the supporting rod (8) is fixedly connected with an upper piston (9), the bottom of the upper piston (9) is fixedly connected with a connecting cylinder (10), the bottom of the connecting cylinder (10) is fixedly connected with a lower piston (11), a partition plate (12) is fixedly connected at the middle position of the inner wall of the valve body (1), the bottom of the inner wall of the valve body (1) is fixedly connected with a limiting rod (13), the outer wall of the limiting rod (13) is sleeved with a return spring (14), two sides of the right side of the valve body (1) close to the partition plate (12) are both in threaded connection with a reset rod (15), the left sides of the reset rods (15) on the two sides are both in sliding connection with a limiting clamping block (16), and the outer wall of the limiting clamping block (16) is sleeved with a limiting spring (17).

2. The gas pipeline self-closing valve according to claim 1, wherein the bottoms of the upper piston (9), the connecting cylinder (10) and the lower piston (11) are provided with sliding holes matched with the limiting rod (13), and the inner walls of the sliding holes are connected with the limiting rod (13) in a sliding manner.

3. The gas pipe self-closing valve according to claim 1, characterized in that the top of the return spring (14) is fixedly connected with the underlying piston (11).

4. The gas pipeline self-closing valve according to claim 1, wherein the top of the partition plate (12) near the left edge is provided with a vent hole, and the two sides of the inner wall of the vent hole are provided with clamping grooves matched with the upper piston (9) and the lower piston (11).

5. The gas pipeline self-closing valve according to claim 1, wherein the opposite sides of the limiting fixture blocks (16) are arranged in a tangent plane structure, and a limiting groove is formed on the adjacent side.

6. The gas pipeline self-closing valve according to claim 1, characterized in that the outer wall of the reset rod (15) is provided with connecting threads, the right side of the valve body (1) is provided with a threaded hole matched with the reset rod (15), and a sealing rubber ring is sleeved at the joint of the reset rod (15) and the valve body (1).

7. The gas pipeline self-closing valve according to claim 1, wherein an anti-dropping block is fixedly connected to the right side of the limiting fixture block (16), a sliding groove matched with the anti-dropping block is formed in the left side of the reset rod (15), and the inner wall of the sliding groove is slidably connected with the anti-dropping block.

8. The gas pipeline self-closing valve according to claim 1, wherein a mounting hole matched with the connecting frame (7) is formed in the middle of the top of the diaphragm (6), and the inner wall of the mounting hole is fixedly connected with the connecting frame (7).