Cylinder valve

Abstract

The utility model discloses a gas cylinder valve which comprises a valve body (1), a valve rod (2) and a pressing nut (4), a hollow convex neck (101) is arranged on the valve body (1), and the upper end of the valve rod (2) penetrates through the convex neck (101) to be exposed out of the valve body (1); the pressing nut (4) is hooped outside the valve rod (2) and is in threaded connection with the convex neck (101); one-way teeth (401) are arranged on the peripheral wall of the threaded connection part of the pressing nut (4) and the convex neck (101), and the edge of the pressing nut (4) is riveted with the threaded edge of the convex neck (101). According to the gas cylinder valve, the dismounting difficulty can be increased, meanwhile, traces can be left after dismounting, recovery cannot be achieved, and therefore potential safety hazards can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, more exactly relates to a gas cylinder valve. BACKGROUND

[0002] The gas cylinder valve, short for bottle valve, is installed on the gas cylinder and is used for controlling the gas to enter or exit the gas cylinder. The gas cylinder valve comprises a valve stem, a valve core, a compression mother, a valve body and a rotating wheel. The valve body is provided with a hollow protruding neck. The upper end of the valve stem passes through the protruding neck and is exposed outside the valve body. The upper end of the valve stem is connected with the rotating wheel. The lower end of the valve stem is connected with the valve core. Rotating the rotating wheel can drive the valve stem to rotate, thereby driving the valve core to open or close the valve. The valve stem is installed in the protruding neck by means of the compression mother. That is, the compression mother is wrapped around the valve stem and is fixedly connected with the protruding neck. A sealing ring is arranged between the compression mother and the end face of the protruding neck to ensure a good sealing state.

[0003] The compression mother and the protruding neck of the prior art gas cylinder valve are connected by threads. Criminals can easily use common tools to illegally disassemble the bottle valve. After disassembly, the parts are replaced to avoid replacing the gas cylinder, so that the gas cylinder that should be replaced is put into use again, causing great safety hazards. To avoid this phenomenon, the compression mother and the protruding neck are fixedly connected by roll riveting. Although the difficulty of disassembly is increased, criminals can still pry open the compression mother cap edge with tools, disassemble the bottle valve, and then use special tools to connect the compression mother and the protruding neck again by roll riveting. After roll riveting, the recovery effect is good, the disassembly marks can be eliminated, and it is difficult to be detected. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a gas cylinder valve. The gas cylinder valve can increase the difficulty of disassembly, and after disassembly, marks will be left, which cannot be recovered, thereby effectively avoiding safety hazards.

[0005] The technical solution of the utility model is to provide a gas cylinder valve, which comprises a valve body, a valve stem and a compression mother. The valve body is provided with a hollow protruding neck. The upper end of the valve stem passes through the protruding neck and is exposed outside the valve body. The compression mother is wrapped around the valve stem and is threadedly connected with the protruding neck. A one-way tooth is arranged on the outer peripheral wall of the threadedly connected part of the compression mother and the protruding neck. The edge of the compression mother is riveted with the threaded edge of the protruding neck.

[0006] After adopting the above structure, the gas cylinder valve of the utility model has the following advantages compared with the prior art.

[0007] Due to the utility model discloses a gas cylinder valve's pressure mother and the outer peripheral wall of the convex neck threaded connection part are equipped with one-way tooth, and the tool can only drive the pressure mother to rotate to the direction of screwing thread under the action of one-way tooth, the tool cannot drive the pressure mother to rotate to the direction of unscrewing thread, can effectively prevent the pressure mother from being disassembled, can increase the difficulty of disassembly. Further, the rim of the pressure mother is riveted with the threaded rim of the convex neck, and a large force is required to disassemble the pressure mother, and the rim of the pressure mother is wrapped outside the threaded rim of the convex neck, so that forcibly pulling the pressure mother will inevitably damage the rim of the pressure mother and the threaded rim of the convex neck, and once damaged, it cannot be restored, thus leaving traces of disassembly, which can be easily found, thereby effectively avoiding safety hazards.

[0008] As an improvement, the one-way tooth is an arc-shaped tooth, the thickness of the arc-shaped tooth gradually changes from thick to thin from one end to the other end, the thick end of the arc-shaped tooth protrudes from the outer peripheral wall of the pressure mother, and the other end of the arc-shaped tooth is connected with the side wall of the pressure mother. After adopting this structure, the structure of the arc-shaped tooth makes the one-way driving effect better.

[0009] As an improvement, the axis corresponding to the one-way tooth is not on the same straight line as the axis of the pressure mother. After adopting this structure, the structure is simple, and the one-way effect is good.

[0010] As an improvement, the inner side of the lower end of the pressure mother protrudes to form a riveting edge, and the riveting edge is riveted with the threaded edge of the convex neck. After adopting this structure, the structure is simple and the riveting effect is good.

[0011] As an improvement, the outer side wall of the riveting edge is a smooth surface. After adopting this structure, the riveting edge is a smooth surface, and it is more difficult to damage it with a tool.

[0012] As an improvement, a sealing ring is arranged between the inner wall of the pressure mother and the end face of the convex neck, the shaft shoulder of the valve rod abuts against the sealing ring, the shoulder top of the shaft shoulder is provided with an embedding ring, and part of the sealing ring is embedded in the embedding ring. After adopting this structure, the valve rod will deform the sealing ring during use and embed it into the embedding ring, thereby improving the sealing effect between the valve rod and the pressure mother. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a sectional view of the gas cylinder valve (not riveted) of the utility model.

[0014] Fig. 2 It is a sectional view of the gas cylinder valve (riveted) of the utility model.

[0015] Fig. 3 It is a top view of the pressure mother of the gas cylinder valve of the utility model.

[0016] Fig. 4It is the sectional structure schematic diagram of the pressure mother of the gas cylinder valve.

[0017] As shown in the figure: 1, valve body, 101, convex neck, 2, valve rod, 201, shaft shoulder, 202, embedded ring, 3, valve core, 4, pressure mother, 401, one-way tooth, 402, riveting edge, 5, rotating wheel, 6, sealing ring. DETAILED DESCRIPTION

[0018] For better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed description is only a description of exemplary embodiments of the present application, and does not limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0019] In the drawings, the thickness, size and shape of the objects have been slightly exaggerated for ease of illustration. The drawings are only examples and are not strictly drawn to scale.

[0020] It should also be understood that the words "comprise", "have", "contain", "contain", when used in the specification, indicate the presence of the stated features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or combinations thereof.

[0021] As Figs. 1 to 4 shown, the present application discloses a kind of gas cylinder valve, including valve body 1, valve rod 2, valve core 3, pressure mother 4 and rotating wheel 5.The hollow convex neck 101 of described valve body 1 is equipped with, the upper end of described valve rod 2 passes through the convex neck 101 and is exposed in the outside of described valve body 1, the upper end of described valve rod 2 is connected with the rotating wheel 5.The lower end of described valve rod 2 is connected with the valve core 3, rotating described rotating wheel 5 can drive the valve rod 2 rotation, to be able to drive valve core 3 to open or close valve.

[0022] Described pressure mother 4 is wrapped in the outside of described valve rod 2 and is connected with the convex neck 101 by screw thread, the inner wall of described pressure mother 4 and the end surface of described convex neck 101 are equipped with sealing ring 6, the shaft shoulder 201 of described valve rod 2 is rested on the sealing ring 6, the shoulder top of described shaft shoulder 201 is equipped with embedded ring 202, part sealing ring 6 is embedded in the embedded ring 202.In the process of use, the greater the force that the shaft shoulder 201 of valve rod 2 extrudes sealing ring 6, the more sealing ring 6 embedded in the embedded ring 202.

[0023] The outer peripheral wall of the threaded connection part of the convex neck 101 of the pressure cap 4 is provided with one-way teeth 401. The one-way teeth 401 are arc-shaped teeth, the thickness of which gradually changes from thick to thin from one end to the other end. The thick end of the arc-shaped teeth protrudes from the outer peripheral wall of the pressure cap 4, and the other end of the arc-shaped teeth is connected to the side wall of the pressure cap 4. The axis corresponding to the one-way teeth 401 is not on the same straight line as the axis of the pressure cap 4. The inner side of the lower end of the pressure cap 4 is convex to form a riveting edge 402, which is riveted to the threaded edge of the convex neck 101. The outer side wall of the riveting edge 402 is a smooth surface.

[0024] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the principle and spirit of the present application are included in the protection scope of the present application.

Claims

1. A gas cylinder valve, comprising a valve body (1), a valve stem (2), and a pressure nut (4), wherein the valve body (1) is provided with a hollow protruding neck (101), and the upper end of the valve stem (2) passes through the protruding neck (101) and protrudes outside the valve body (1); the pressure nut (4) is sleeved on the valve stem (2) and threadedly connected to the protruding neck (101); characterized in that: The outer peripheral wall of the threaded connection between the nut (4) and the protruding neck (101) is provided with one-way teeth (401), and the edge of the nut (4) is riveted to the threaded edge of the protruding neck (101).

2. The gas cylinder valve according to claim 1, characterized in that: The one-way tooth (401) is an arc-shaped tooth. The thickness of the arc-shaped tooth gradually changes from thick to thin from one end to the other end. The thick end of the arc-shaped tooth protrudes from the outer peripheral wall of the pressure nut (4), and the other end of the arc-shaped tooth is connected to the side wall of the pressure nut (4).

3. The gas cylinder valve according to claim 2, characterized in that: The axis corresponding to the one-way tooth (401) is not on the same straight line as the axis of the pressure nut (4).

4. The gas cylinder valve according to claim 2, characterized in that: The inner side of the lower end of the pressure nut (4) protrudes to form a riveting edge (402), and the riveting edge (402) is riveted to the threaded edge of the protruding neck (101).

5. The gas cylinder valve according to claim 4, characterized in that: The outer wall of the riveted edge (402) is a smooth surface.

6. The gas cylinder valve according to claim 1, characterized in that: A sealing ring (6) is provided between the inner wall of the pressure nut (4) and the end face of the protruding neck (101). The shoulder (201) of the valve stem (2) abuts against the sealing ring (6). An embedded ring (202) is provided on the shoulder top of the shoulder (201), and part of the sealing ring (6) is embedded in the embedded ring (202).

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