Liquefied petroleum gas cylinder valve

Abstract

The liquefied petroleum gas cylinder valve comprises a valve body, a hand wheel is installed at the upper end of the valve body, a valve assembly extending up and down is installed in the valve body, the upper end of the valve assembly is fixedly connected with the lower end of the hand wheel, a pressure relief device is installed at the left end of the valve body, an outlet end is arranged at the right end of the valve body, an inner cavity is formed in the outlet end, and the right end of the inner cavity is open. A spring, a valve element and a pressing cap are installed in the inner cavity, the valve element is located in the middle of the inner cavity, the spring is clamped between the inner wall of the left end of the inner cavity and the left end of the valve element in a left-right extending mode, the valve element is sleeved with the pressing cap, an O-shaped ring is clamped between the outer wall of the pressing cap and the inner wall of the inner cavity, a step is arranged at the right end of the inner cavity, and the right end of the pressing cap is pressed on the step. The design that the pressing cap is directly pressed on the step of the inner cavity of the valve body is adopted, a traditional clamping ring fixing mode is replaced, the fixing structure is simplified, the number of parts is reduced, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cylinder valves, in particular to a liquefied petroleum gas cylinder valve. Background Art

[0002] As a widely used fuel, the safety and reliability of liquefied petroleum gas (LPG) have always been a key concern for users and related industries. Traditional LPG cylinder valve designs typically utilize a self-closing device at the outlet. The primary function of this device is to prevent accidental gas leakage and ensure the personal and property safety of users. Traditional self-closing devices often utilize a retaining ring, securing the valve core to the outlet of the valve body via a retaining ring and a pressure cap to prevent the core from loosening during use, thereby ensuring the stability and sealing of the valve. However, self-closing devices secured with retaining rings are relatively complex and require a large number of parts, which not only increases production costs but can also cause inconvenience during installation and maintenance. Furthermore, the complex structure increases the likelihood of failure, reducing the overall reliability of the valve. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a liquefied petroleum gas cylinder valve.

[0004] The technical solution of the utility model is: a liquefied petroleum gas cylinder valve, comprising a valve body, a hand wheel is installed on the upper end of the valve body, a valve assembly extending up and down is installed in the valve body, the upper end of the valve assembly is fixedly connected to the lower end of the hand wheel, a pressure relief device is installed on the left end of the valve body, an outlet end is provided at the right end of the valve body, an inner cavity is provided in the outlet end, the right end of the inner cavity is open, a spring, a valve core and a pressure cap are installed in the inner cavity, the valve core is located in the middle of the inner cavity, the spring extends left and right and is clamped between the inner wall of the left end of the inner cavity and the left end of the valve core, the pressure cap is sleeved on the outside of the valve core, an O-ring is clamped between the outer wall of the pressure cap and the inner wall of the inner cavity, the right end of the inner cavity is provided with a step, and the right end of the pressure cap is pressed on the step.

[0005] Furthermore, a sealing gasket is sleeved on the outer wall of the middle part of the valve core, and the left end of the pressure cap is pressed on the outer wall of the sealing gasket.

[0006] Furthermore, the outer side of the sealing gasket has an inclined surface, and the left end of the pressing cap has an arc surface pressed on the inclined surface.

[0007] Furthermore, the right end of the pressure cap is provided with a spring piece, which presses on the step.

[0008] Furthermore, the left end of the inner cavity has a first groove, the left end of the spring is clamped into the first groove, the left end of the valve core has a second groove, and the right end of the spring is clamped into the second groove.

[0009] The utility model provides a liquefied petroleum gas cylinder valve, which has the beneficial effects of: adopting a design in which the pressure cap is directly pressed on the step of the valve body cavity, replacing the traditional clamping ring fixing method, simplifying the fixing structure, reducing the number of parts, and lowering the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure inside the outlet end of the utility model.

[0012] As shown in the figure: 1-valve body, 11-outlet end, 111-inner cavity, 1111-step, 1112-first groove, 2-handwheel, 3-valve assembly, 4-pressure relief device, 5-spring, 6-valve core, 61-second groove, 7-pressure cap, 71-spring, 8-O-ring, 9-sealing gasket, 91-inclined surface. DETAILED DESCRIPTION

[0013] In order to more intuitively and completely understand the technical solution of the present invention, the following non-limiting features are described in conjunction with the accompanying drawings of the present invention:

[0014] like Figure 1 、 Figure 2 As shown, a liquefied petroleum gas cylinder valve includes a valve body 1, a handwheel 2 is installed on the upper end of the valve body 1, a valve assembly 3 extending up and down is installed in the valve body 1, the upper end of the valve assembly 3 is fixedly connected to the lower end of the handwheel 2, a pressure relief device 4 is installed on the left end of the valve body 1, an outlet end 11 is provided at the right end of the valve body 1, an inner cavity 111 is provided in the outlet end 11, the right end of the inner cavity 111 is open, a spring 5, a valve core 6 and a pressure cap 7 are installed in the inner cavity 111, the valve core 6 is located in the middle of the inner cavity 111, the spring 5 extends left and right and is stuck between the inner wall of the left end of the inner cavity 111 and the left end of the valve core 6, the pressure cap 7 is sleeved on the outside of the valve core 6, an O-ring 8 is stuck between the outer wall of the pressure cap 7 and the inner wall of the inner cavity 111, the right end of the inner cavity 111 has a step 1111, and the right end of the pressure cap 7 is pressed on the step 1111.

[0015] like Figure 2 As shown, a sealing gasket 9 is sleeved on the outer wall of the middle portion of the valve core 6, and the left end of the pressing cap 7 is pressed against the outer wall of the sealing gasket 9. The outer side of the sealing gasket 9 has an inclined surface 91, and the left end of the pressing cap 7 has an arc surface that presses against the inclined surface 91, facilitating contact between the pressing cap 7 and the inclined surface 91, so that the pressing cap 7 can stably press the sealing gasket 9.

[0016] like Figure 2As shown, the right end of the pressure cap 7 has a spring piece 71, which presses on the step 1111. Because the spring piece 71 presses on the step 1111, the pressure cap 7 is not easy to fall off and can also play a role in preventing disassembly. When installing the pressure cap 7, use a tool to expand the spring piece 71 so that the spring piece 71 presses on the step 1111.

[0017] like Figure 2 As shown, the left end of the inner cavity 111 has a first groove 1112, into which the left end of the spring 5 is inserted, and the left end of the valve core 6 has a second groove 61, into which the right end of the spring 5 is inserted. The spring 5 is securely mounted, and this design reduces deformation or damage to the spring 5 caused by uneven force during use.

[0018] The utility model provides a liquefied petroleum gas cylinder valve, which adopts a design in which a pressure cap 7 is directly pressed on a step 1111 of an inner cavity 111 of a valve body 1, replacing a traditional clamping ring fixing method, simplifying the fixing structure, reducing the number of parts, and lowering production costs.

[0019] Of course, the above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All simple modifications and equivalent structural changes made using the contents of the description and drawings of the present invention should be included in the patent protection scope of the present invention.

Claims

1. A liquefied petroleum gas cylinder valve, comprising a valve body, a handwheel mounted on the upper end of the valve body, a valve assembly extending vertically mounted within the valve body, the upper end of the valve assembly being fixedly connected to the lower end of the handwheel, a pressure relief device mounted on the left end of the valve body, and an outlet port on the right end of the valve body, characterized in that: There is an inner cavity in the outlet end, and the right end of the inner cavity is open. A spring, a valve core and a pressure cap are installed in the inner cavity. The valve core is located in the middle of the inner cavity. The spring extends left and right and is stuck between the inner wall of the left end of the inner cavity and the left end of the valve core. The pressure cap is sleeved on the outside of the valve core, and an O-ring is stuck between the outer wall of the pressure cap and the inner wall of the inner cavity. There is a step at the right end of the inner cavity, and the right end of the pressure cap is pressed on the step.

2. A liquefied petroleum gas cylinder valve according to claim 1, characterized in that: A sealing gasket is sleeved on the outer wall of the middle part of the valve core, and the left end of the pressure cap is pressed on the outer wall of the sealing gasket.

3. A liquefied petroleum gas cylinder valve according to claim 2, characterized in that: The outer side of the sealing gasket is provided with an inclined surface, and the left end of the pressing cap is provided with an arc surface pressed on the inclined surface.

4. A liquefied petroleum gas cylinder valve according to claim 1, characterized in that: The right end of the pressure cap is provided with a spring piece, which presses on the step.

5. The liquefied petroleum gas cylinder valve according to claim 1, characterized in that: The left end of the inner cavity is provided with a first groove, the left end of the spring is clamped in the first groove, the left end of the valve core is provided with a second groove, and the right end of the spring is clamped in the second groove.

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