Gas self-closing valve

Abstract

The utility model discloses a fuel gas self-closing valve, which belongs to the technical field of fuel gas self-closing valves, and comprises a pull cover, an iron sheet I and a valve body, the valve body is connected with a valve cover through the iron sheet I, the upper surface of the valve cover is fixedly connected with a pull cap, and the pull cover is movably arranged on the upper surface of the pull cap; a pull rod is movably arranged in the pull cover, a magnet is connected to the bottom of the pull rod through a first screw, and a cross-shaped iron sheet is fixedly connected to the inner wall of the valve body. The plastic sliding block is arranged in the cross-shaped iron sheet in a sliding manner; and the sealing flat gasket is fixedly connected to the tail end of the plastic lever. According to the gas self-closing valve, after the pull cover is pulled open, the pull rod is pulled, the plastic sliding block, the plastic sliding rod and the sealing flat gasket work, at the moment, the plastic sliding block, the plastic sliding rod and the sealing flat gasket can well seal the interior of the valve body, the sealing performance is optimized, gas leakage is reduced, and then the safety problem is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas self - closing valves, and specifically relates to a gas self - closing valve. Background Art

[0002] A gas self - closing valve is a gas safety device. In the gas system, it plays an important role. When it works, it has the functions of over - pressure protection and leakage prevention, and also has the functions of pressure monitoring and dynamic adjustment, which can ensure the normal operation of the gas system;

[0003] For example, a gas self - closing valve with the publication number CN108518509A includes a valve body, an upper cover, a valve stem, a diaphragm, an upper sealing plug and a lower sealing plug. A valve cavity is provided in the valve body, and a valve port is provided at the upper end of the valve cavity. The edge of the diaphragm is pressed by the upper cover. The upper sealing plug and the lower sealing plug are installed on the valve stem. The valve port is arranged at the interval between the upper sealing plug and the lower sealing plug. An installation cylinder is provided at the upper end of the upper cover. A magnetic ring is fixedly sleeved on the valve stem and magnetically contacts the bottom of the installation cylinder. A knob is sleeved on the outer wall of the installation cylinder. The end of the valve stem is fixedly installed with an end cap. A first central shaft hole is provided on the knob. The end cap is in a cylindrical shape and is movably arranged in the first central shaft hole. An elastic ring is arranged on the outer peripheral surface of the end cap, and the elastic ring frictionally contacts the inner wall of the first central shaft hole. A locking mechanism is provided between the outer wall of the installation cylinder and the knob. In this way, the technical effects of simple structure, small volume and safety and reliability are achieved, thus canceling the use of ball valves, saving resources and improving the installation efficiency;

[0004] There is also a gas self - closing valve with the publication number CN113932050B, belonging to the technical field of gas. It solves the problems of heavy weight and high production cost while ensuring integrity. It includes a valve body with an upper - side opening, a valve cover connected to the upper side of the valve body, and a diaphragm with an outer edge clamped between the valve body and the valve cover. A valve stem is fixed in the center of the diaphragm. The upper end of the valve stem extends out of the valve cover and is connected with a top cap. The valve cover includes a cap head and a body formed by stamping a metal plate. The lower end of the body is sleeved on the outer side of the upper side of the valve body and is fixed by spin - riveting. The top of the body is provided with an installation hole penetrating through both ends. The lower end of the cap head has a connecting portion matching the installation hole. The cap head and the body are fixed by riveting after stamping upward from the lower direction of the connecting portion. It has the advantages of good integrity, light weight and low production cost;

[0005] During the use process, it is difficult to ensure the sealing performance at the connection of the valve body itself, which may lead to gas or liquid leakage, affecting the safety and performance of the equipment, and further affecting the normal operation of the gas system. And the devices in the above applications do not have the effect of self - sealing, making the device operation difficult.

[0006] In view of the above problems, it is urgent to innovate and design on the basis of the original gas self - closing valve. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide a gas self - closing valve to solve the problems of not having a self - sealing effect and difficult device operation proposed in the above - mentioned background technology.

[0008] To achieve the above purpose, the present utility model provides the following technical solution: A gas self - closing valve includes a pull - cover, an iron sheet I, and a valve body. The valve body is connected to a valve cover through the iron sheet I. The upper surface of the valve cover is fixedly connected with a pull - cap, and the pull - cover is movably arranged on the upper surface of the pull - cap.

[0009] A pull - rod is movably arranged inside the pull - cover. The bottom of the pull - rod is connected with a magnet through a first screw. A cross - shaped iron sheet is fixedly connected to the inner wall of the valve body, and a plastic cover is fixedly connected to the upper surface of the cross - shaped iron sheet. The pull - rod and the pull - cap are in snap - fit connection.

[0010] It further includes:

[0011] A plastic slider that is slidably arranged inside the cross - shaped iron sheet, and a plastic lever is movably arranged on the lower surface of the plastic slider.

[0012] A sealing flat gasket that is fixedly connected to the end of the plastic lever.

[0013] Preferably, a nut is threadedly connected to the outside of the pull - rod. The lower surface of the nut is in contact with a plastic gasket, and the plastic gasket is sleeved and connected to the outside of the pull - rod.

[0014] Preferably, a tympanic membrane is fixedly connected to the outside of the pull - rod. A plastic king is rotatably connected inside the valve body, and a copper ball is fixedly connected inside the plastic king.

[0015] Preferably, a positioning plastic is fixedly connected to the outer wall of the valve body. An O - ring is fixedly connected to the upper surface of the plastic king. A copper valve stem is arranged inside the O - ring. A second screw is threadedly connected inside the copper valve stem. The outer surface of the second screw is fixedly connected with a handle, and the inner wall of the handle is in contact with the positioning plastic.

[0016] Preferably, a cap is fixedly connected to the upper surface of the second screw. An air outlet nozzle is threadedly connected to the right side of the valve body. A label is arranged on the pull - cover.

[0017] Preferably, a current limiter is fixedly connected inside the valve body, and a snap - ring is sleeved and connected to the surface of the current limiter.

[0018] Preferably, a partition plate is slidably arranged inside the current limiter. A return spring is fixedly connected to the right side of the partition plate, and the other side of the return spring is fixedly connected to the inner wall of the current limiter.

[0019] Compared with the prior art, the beneficial effects of the utility model are as follows: This gas self-closing valve adopts a new structural design, and the specific content is as follows:

[0020] (1) After pulling open the pull cover of this gas self-closing valve and then pulling the pull rod, the plastic slider, plastic slide rod and sealing flat gasket work. At this time, the plastic slider, plastic slide rod and sealing flat gasket can well seal the inside of the valve body, optimizing the sealing performance, reducing gas leakage, and thus avoiding safety problems.

[0021] Further, the setting of the O-ring greatly improves the sealing performance at the connection position inside the valve body. When the operator rotates the handle, the plastic king and the copper ball also rotate. At this time, the position where the copper ball is not open blocks the valve body, making the valve body no longer flow through, playing a role of isolation.

[0022] (2) When there is a gas leakage in the gas system of this gas self-closing valve, the gas flow rate inside the valve body increases. At this time, the partition plate will move to the right under the action of the air flow, blocking the internal channel of the valve body, and thus avoiding the situation of gas leakage and ensuring the overall safety.

[0023] Further, when the partition plate moves to the right, it will compress the return spring. When the gas system returns to normal, the partition plate returns to its original position under the action of the return spring, facilitating the subsequent use of the device.

[0024] (3) This gas self-closing valve can protect the second screw through the set cap, and the set label can enable the operator to more conveniently understand the overall use steps and precautions during use of the device, improving the convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the front sectional structure of the valve body of the utility model;

[0026] Figure 2 For the utility model Figure 1 The enlarged structural schematic diagram at A in;

[0027] Figure 3 It is a schematic diagram of the connection structure between the partition plate and the return spring of the utility model.

[0028] In the figure: 1. Pull cover; 2. Pull cap; 3. Pull rod; 4. Valve cover; 5. Nut; 6. Plastic gasket; 7. Iron sheet 1; 8. Diaphragm; 9. First screw; 10. Magnet; 11. Plastic cover; 12. Plastic slider; 13. Plastic lever; 14. Second screw; 15. Handle; 16. Copper valve stem; 17. O-ring; 18. Copper ball; 19. PTFE; 20. Air outlet nozzle; 21. Valve body; 22. Flow limiter; 23. Cap; 24. Label; 25. Cross iron sheet; 26. Sealing flat gasket; 27. Snap ring; 28. Positioning plastic; 29. Partition board; 30. Return spring. Detailed implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1: By providing the plastic slider 12, plastic lever 13 and sealing flat gasket 26, the overall sealing performance of the valve body 21 is improved, as Figure 1 and Figure 2 shown:

[0031] It includes a pull cover 1, an iron sheet 1 7 and a valve body 21. The valve body 21 is connected to a valve cover 4 through the iron sheet 1 7. The upper surface of the valve cover 4 is fixedly connected with a pull cap 2, and the pull cover 1 is movably arranged on the upper surface of the pull cap 2;

[0032] A pull rod 3 is movably arranged inside the pull cover 1. The bottom of the pull rod 3 is connected to a magnet 10 through a first screw 9. A cross iron sheet 25 is fixedly connected to the inner wall of the valve body 21, and a plastic cover 11 is fixedly connected to the upper surface of the cross iron sheet 25. The pull rod 3 and the pull cap 2 are in snap connection;

[0033] It further includes:

[0034] A plastic slider 12, the plastic slider 12 is slidably arranged inside the cross iron sheet 25, and a plastic lever 13 is movably arranged on the lower surface of the plastic slider 12. A sealing flat gasket 26, the sealing flat gasket 26 is fixedly connected to the end of the plastic lever 13. A nut 5 is threadedly connected to the outside of the pull rod 3, and a plastic gasket 6 is attached to the lower surface of the nut 5, and the plastic gasket 6 is sleeved and connected to the outside of the pull rod 3.

[0035] After opening the pull cover 1, pulling the pull cap 2 drives the pull rod 3 to move. At this time, the pull rod 3 drives the plastic slider 12 and the plastic lever 13 to rise through the first screw 9. Furthermore, the plastic slider 12 and the plastic lever 13 optimize the sealing inside the valve body 21. At this time, the gas is transported through the through hole on the plastic cover 11. At the same time, the tympanic membrane 8 deforms inside the iron sheet 7, and the tympanic membrane 8 contacts the plastic gasket 6, thereby adjusting the overall gas flow rate of the valve body 21. The setting of the nut 5 enables the height of the plastic gasket 6 to be quickly adjusted, thereby improving the overall flexibility of the valve body 21. When the external pressure increases, the plastic cover 11 and the magnet 10 work, causing the valve body 21 to self-close under the magnetic force, improving the overall safety of the device.

[0036] Embodiment 2: Different from Embodiment 1, by setting the handle 15, the working state of the valve body 21 can be quickly adjusted, such as Figure 1 shown:

[0037] A tympanic membrane 8 is fixedly connected to the outside of the pull rod 3. A plastic king 19 is rotatably connected inside the valve body 21, and a copper ball 18 is fixedly connected inside the plastic king 19. A positioning plastic 28 is fixedly connected to the outer wall of the valve body 21. An O-ring 17 is fixedly connected to the upper surface of the plastic king 19, and a copper valve stem 16 is arranged inside the O-ring 17. And a second screw 14 is threadedly connected inside the copper valve stem 16, and a handle 15 is fixedly connected to the outer surface of the second screw 14. At the same time, the inner wall of the handle 15 fits with the positioning plastic 28. A cap 23 is fixedly connected to the upper surface of the second screw 14. An air outlet nozzle 20 is threadedly connected to the right side of the valve body 21. A label 24 is arranged on the pull cover 1.

[0038] When the handle 15 is rotated, the copper valve stem 16 will also rotate. At this time, the plastic king 19 and the copper ball 18 will also rotate. When the open position of the copper ball 18 rotates to block the valve body 21, the valve body 21 is closed, and the O-ring 17 plays a sealing role. When the valve body 21 needs to be used, the handle 15 can be rotated again to make the valve body 21 work normally.

[0039] Embodiment 3: Different from Embodiment 2, by setting the partition plate 29 and the return spring 30, when the gas system leaks, the valve body 21 can self-close, such as Figure 3 shown:

[0040] A current limiter 22 is fixedly connected inside the valve body 21, and a snap ring 27 is sleeved on the surface of the current limiter 22. A partition plate 29 is slidably arranged inside the current limiter 22, and a return spring 30 is fixedly connected to the right side of the partition plate 29. And the other side of the return spring 30 is fixedly connected to the inner wall of the current limiter 22.

[0041] When there is a gas leakage in the gas system, the gas flow rate inside the valve body 21 increases. At this time, the partition plate 29 will move to the right inside the flow limiter 22 under the action of the air flow, blocking the internal channel of the valve body 21, thus avoiding the gas leakage situation and ensuring the overall safety. When the partition plate 29 moves to the right, it will compress the return spring 30. When the gas system returns to normal, the partition plate 29 returns to its original position under the action of the return spring 30, facilitating the subsequent use of the device.

[0042] The above is the working process of the entire device, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas self-closing valve, comprising a pull cover (1), an iron sheet (7) and a valve body (21), wherein the valve body (21) is connected to a valve cover (4) via the iron sheet (7), and a pull cap (2) is fixedly connected to the upper surface of the valve cover (4), and the pull cover (1) is movably provided on the upper surface of the pull cap (2); A pull rod (3) is movably provided inside the pull cover (1), and the bottom of the pull rod (3) is connected to a magnet (10) via a first screw (9); a cross iron sheet (25) is fixedly connected to the inner wall of the valve body (21), and a plastic cover (11) is fixedly connected to the upper surface of the cross iron sheet (25); the pull rod (3) and the pull cap (2) are connected in a snap-fit ​​manner; It is characterized in that Also includes: A plastic slider (12), the plastic slider (12) being slidably disposed inside the cross iron sheet (25), and a plastic lever (13) being movably disposed on the lower surface of the plastic slider (12); A sealing flat gasket (26), wherein the sealing flat gasket (26) is fixedly connected to the end of the plastic lever (13).

2. A gas self-closing valve according to claim 1, characterized in that: The outer side of the pull rod (3) is threadedly connected to a nut (5), and a plastic gasket (6) is fitted on the lower surface of the nut (5), and the plastic gasket (6) is sleeved and connected to the outer side of the pull rod (3).

3. A gas self-closing valve according to claim 1, characterized in that: The outer side of the pull rod (3) is fixedly connected to a drum membrane (8), the interior of the valve body (21) is rotatably connected to a plastic king (19), and the interior of the plastic king (19) is fixedly connected to a copper ball (18).

4. A gas self-closing valve according to claim 3, characterized in that: A positioning plastic (28) is fixedly connected to the outer wall of the valve body (21), an O-ring (17) is fixedly connected to the upper surface of the plastic king (19), a copper valve stem (16) is arranged inside the O-ring (17), a second screw (14) is connected to the inner thread of the copper valve stem (16), and a handle (15) is fixedly connected to the outer surface of the second screw (14), and the inner wall of the handle (15) is in contact with the positioning plastic (28).

5. A gas self-closing valve according to claim 4, characterized in that: A cover cap (23) is fixedly connected to the upper surface of the second screw (14), an air outlet nozzle (20) is threadedly connected to the right side of the valve body (21), and a label (24) is provided on the pull cover (1).

6. A gas self-closing valve according to claim 1, characterized in that: The interior of the valve body (21) is fixedly connected to a flow limiter (22), and a retaining spring (27) is sleeved and connected to the surface of the flow limiter (22).

7. A gas self-closing valve according to claim 6, characterized in that: A partition plate (29) is slidably disposed inside the flow limiter (22), a return spring (30) is fixedly connected to the right side of the partition plate (29), and the other side of the return spring (30) is fixedly connected to the inner wall of the flow limiter (22).

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