A leak-proof valve device for a liquefied petroleum gas transport vehicle

Abstract

The utility model discloses an anti-leakage valve device for a liquefied petroleum gas transport vehicle, comprising a valve tube body, a threaded rear cover movably installed at a rear end position inside the valve tube body, and a piston plugging head inside the valve tube body. The anti-leakage valve device for a liquefied petroleum gas transport vehicle described in the utility model can automatically open and close the anti-leakage valve device for the liquefied petroleum gas transport vehicle through the valve tube body and the threaded rear cover in conjunction with the piston plugging head and the movable power frame, with a better sealing effect and a limited position structure, and the valve tube body, the threaded rear cover, the piston plugging head and the movable power frame are easy to disassemble, which is beneficial to the maintenance of the anti-leakage valve device, wherein the threaded rear cover can be conveniently removed from the rear end of the valve tube body, the movable power frame can automatically pull the piston plugging head inside the valve tube body to move, and the movable power frame has an anti-slip limit structure.

Description

Technical Field

[0001] This utility model relates to the field of valve structure technology, and in particular to a leak-proof valve device for liquefied petroleum gas transport vehicles. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of conveyed media. Based on their function, they can be categorized as shutoff valves, check valves, and regulating valves. Valves are control components in fluid conveying systems, performing functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion, and overflow pressure relief. Valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metal, and radioactive media.

[0003] The existing anti-leakage valve devices of liquefied petroleum gas transport vehicles have certain disadvantages when used. The anti-leakage valves in traditional liquefied petroleum gas transport vehicles cannot be opened and closed automatically, the sealing effect is poor, the valves are inconvenient to disassemble, and the bolts need to be disassembled and tightened, which is not conducive to the maintenance of the anti-leakage valve devices. Utility Model Content

[0004] The main objective of this invention is to provide a leak-proof valve device for liquefied petroleum gas transport vehicles, which can effectively solve the problems in the background art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A leakage-proof valve device for a liquefied petroleum gas transport vehicle comprises a valve tube body, a threaded rear cover is movably installed at a rear end position inside the valve tube body, a piston sealing head is provided inside the valve tube body, a movable power frame is fixedly installed on the rear surface of the threaded rear cover, the rear end of the piston sealing head is fixedly connected to the front end of the movable power frame, a flange is fixedly installed at the front end of the valve tube body, and a threaded groove is provided on the inner side of the valve tube body at the rear end position.

[0007] Preferably, the threaded rear cover includes a rear cover body, a movable hinge, and a handle.

[0008] Preferably, the rear cover body is rotatably mounted inside the valve tube body at a rear end position, the movable hinge is fixedly mounted on the outside of the rear cover body, and the handle is fixedly mounted on the end of the movable hinge away from the rear cover body. There are two movable hinges installed, and the movable hinges are evenly distributed on the outside of the rear cover body.

[0009] Preferably, the piston sealing head includes a sealing head body, a sealing tube, a limiting short rod, and a threaded long rod.

[0010] Preferably, the plugging head body is located inside the valve tube body, the sealing tube is fixedly installed on the outside of the plugging head body, the limiting short rod is movably located inside the plugging head body, the threaded long rod is fixedly installed at the rear end of the limiting short rod, the rear end of the threaded long rod passes through the threaded through hole of the rear cover body, and an annular groove is provided on the outside of the sealing tube.

[0011] Preferably, the movable power frame includes a U-shaped guide rail frame, a limiting slide frame, a forward and reverse motor, a limiting tube, and an electric telescopic rod.

[0012] Preferably, the U-shaped guide rail frame is fixedly installed on the rear surface of the rear cover body, the limiting slide frame is located inside the U-shaped guide rail frame, the forward and reverse motor is fixedly installed inside the limiting slide frame, the limiting tube is fixedly installed on the rear surface of the forward and reverse motor, the electric telescopic rod is fixedly installed inside the through hole on the upper surface of the U-shaped guide rail frame, the front end of the forward and reverse motor is fixedly connected to the rear end of the threaded long rod, the lower end of the electric telescopic rod passes through the interior of the limiting tube, and the lower end of the electric telescopic rod is inserted into the through hole on the lower surface of the U-shaped guide rail frame.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this utility model, the valve tube body, threaded rear cover, piston plug, and movable power frame are designed to enable the anti-leakage valve device of the liquefied petroleum gas transport vehicle to open and close automatically, resulting in better sealing. The device features a limit structure and is easily disassembled, facilitating maintenance of the anti-leakage valve device. The threaded rear cover can be easily removed from the rear end of the valve tube body, and the movable power frame automatically pulls the piston plug inside the valve tube body to move. The movable power frame has an anti-slip limit structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an anti-leakage valve device for a liquefied petroleum gas transport vehicle according to the present invention.

[0016] Figure 2 This is a schematic diagram of the main structure of the valve tube of an anti-leakage valve device for a liquefied petroleum gas transport vehicle according to the present invention.

[0017] Figure 3 This is an exploded view of the threaded rear cover, piston plug and movable power frame structure of the anti-leakage valve device for a liquefied petroleum gas transport vehicle according to this utility model.

[0018] Figure 4 This utility model relates to a leak-proof valve device for liquefied petroleum gas transport vehicles. Figure 1A magnified schematic diagram of part A;

[0019] Figure 5 This utility model relates to a leak-proof valve device for liquefied petroleum gas transport vehicles. Figure 1 Enlarged schematic diagram of part B in the middle.

[0020] In the diagram: 1. Valve tube body; 2. Threaded rear cover; 201. Rear cover body; 202. Movable hinge; 203. Handle; 3. Piston plug; 301. Plug body; 302. Sealing tube; 303. Limiting short rod; 304. Threaded long rod; 4. Movable power frame; 401. U-shaped guide rail frame; 402. Limiting slide frame; 403. Forward and reverse motor; 404. Limiting tube; 405. Electric telescopic rod. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figure 1-5 As shown, a leak-proof valve device for a liquefied petroleum gas (LPG) transport vehicle includes a valve tube body 1. A threaded rear cover 2 is movably installed inside the valve tube body 1 at its rear end. A piston plug head 3 is provided inside the valve tube body 1. A movable power frame 4 is fixedly installed on the rear surface of the threaded rear cover 2. The rear end of the piston plug head 3 is fixedly connected to the front end of the movable power frame 4. A flange is fixedly installed at the front end of the valve tube body 1. A threaded groove is formed on the inner side of the valve tube body 1 at its rear end. The valve tube body 1, threaded rear cover 2, piston plug head 3, and movable power frame 4 enable the leak-proof valve device of the LPG transport vehicle to open and close automatically, resulting in better sealing. It has a limiting structure, and the valve tube body 1, threaded rear cover 2, piston plug head 3, and movable power frame 4 are easy to disassemble, which is beneficial for the maintenance of the leak-proof valve device. The threaded rear cover 2 can be easily removed from the rear end of the valve tube body 1, and the movable power frame 4 can automatically pull the piston plug head 3 inside the valve tube body 1 to move. The movable power frame 4 has an anti-slip limiting structure.

[0023] The threaded back cover 2 includes a back cover body 201, a movable hinge 202 and a handle 203; the back cover body 201 is rotatably installed in the rear end of the valve tube body 1, the movable hinge 202 is fixedly installed on the outside of the back cover body 201, and the handle 203 is fixedly installed at the end of the movable hinge 202 away from the back cover body 201. There are two movable hinges 202 installed, and the movable hinges 202 are evenly distributed on the outside of the back cover body 201; the piston plugging head 3 includes a plugging head body 301, a sealing tube 302, a limiting short rod 303 and a threaded long rod 304; the plugging head body 301 is arranged in the interior of the valve tube body 1, the sealing tube 302 is fixedly installed on the outside of the plugging head body 301, the limiting short rod 303 is movably arranged in the interior of the plugging head body 301, the threaded long rod 304 is fixedly installed at the rear end of the limiting short rod 303, and the threaded long rod 304 is fixedly installed The rear end of the rod 304 passes through the threaded through hole of the rear cover body 201, and an annular groove is provided on the outside of the sealing tube 302; the movable power frame 4 includes a U-shaped guide rail frame 401, a limiting slide frame 402, a forward and reverse motor 403, a limiting tube 404 and an electric telescopic rod 405; the U-shaped guide rail frame 401 is fixedly installed on the rear surface of the rear cover body 201, the limiting slide frame 402 is arranged inside the U-shaped guide rail frame 401, the forward and reverse motor 403 is fixedly installed inside the limiting slide frame 402, the limiting tube 404 is fixedly installed on the rear surface of the forward and reverse motor 403, the electric telescopic rod 405 is fixedly installed inside the through hole on the upper surface of the U-shaped guide rail frame 401, the front end of the forward and reverse motor 403 is fixedly connected to the rear end of the threaded long rod 304, the lower end of the electric telescopic rod 405 passes through the interior of the limiting tube 404, and the lower end of the electric telescopic rod 405 is inserted into the through hole on the lower surface of the U-shaped guide rail frame 401.

[0024] It should be noted that the present invention is an anti-leakage valve device for a liquefied petroleum gas transport vehicle. When in use, the valve tube body 1, the threaded rear cover 2, the piston sealing head 3 and the movable power frame 4 are installed on the liquefied petroleum gas transport vehicle through the flange at the front end of the valve tube body 1. When the valve is to be opened, the electric telescopic rod 405 is retracted until the lower end of the electric telescopic rod 405 is withdrawn from the limit tube 404, and the forward and reverse motor 403 drives the threaded long rod 304 to rotate, so that the threaded long rod 304 rotates and moves in the threaded through hole of the rear cover body 201, limiting The positioning slide frame 402 moves along the U-shaped guide frame 401, the limiting short rod 303 rotates inside the plugging head body 301, and the plugging head body 301 moves inside the valve tube body 1 until the plugging head body 301 moves to the rear end of the plugging head body 301, the valve is opened, and the sealing tube 302 plays a sealing role. When closing, the forward and reverse motor 403 drives the threaded long rod 304 to move forward, and pushes the plugging head body 301 forward along the inside of the valve tube body 1 until the plugging head body 301 is pushed to the front end of the valve tube body 1, and the electric telescopic rod 40 The lower end of the piston 5 is inserted through the interior of the limiting tube 404 and into the through hole on the lower surface of the U-shaped guide rail frame 401 to prevent the sealing head body 301 from being pressed against the rear end of the valve tube body 1 after power failure. When the interior of the valve tube body 1 and the piston sealing head 3 are to be repaired, the rear cover body 201 can be rotated by holding the handle 203 to remove the rear cover body 201 from the interior of the valve tube body 1. When reinstalling, the rear cover body 201 is reinstalled inside the valve tube body 1, and the handle 203 is moved by the movable hinge 202 so that the handle 203 fits the outer side of the valve tube body 1. The valve tube body 1 and the threaded rear cover 2 cooperate with the piston sealing head 3 and the movable power frame 4 to enable the anti-leakage valve device of the liquefied petroleum gas transport vehicle to be automatically opened and closed, with better sealing effect and a limited structure. The valve tube body 1, the threaded rear cover 2, the piston sealing head 3 and the movable power frame 4 are easy to disassemble, which is beneficial to the maintenance of the anti-leakage valve device. The threaded rear cover 2 can be easily removed from the rear end of the valve tube body 1, and the movable power frame 4 can automatically pull the piston sealing head 3 inside the valve tube body 1 to move, and the movable power frame 4 has an anti-slip limiting structure.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. An anti-leakage valve device for a liquefied petroleum gas transport vehicle, characterized in that: It includes a valve tube body, a threaded rear cover is movably installed at the rear end position inside the valve tube body, a piston sealing head is provided inside the valve tube body, a movable power frame is fixedly installed on the rear surface of the threaded rear cover, the rear end of the piston sealing head is fixedly connected to the front end of the movable power frame, a flange is fixedly installed at the front end of the valve tube body, and a threaded groove is opened on the inner side of the valve tube body at the rear end.

2. The anti-leakage valve device for a liquefied petroleum gas transport vehicle according to claim 1, characterized in that: The threaded rear cover comprises a rear cover body, a movable hinge and a handle.

3. The anti-leakage valve device for a liquefied petroleum gas transport vehicle according to claim 2, characterized in that: The rear cover body is rotatably mounted inside the valve tube body at a rear end position, the movable hinge is fixedly mounted on the outer side of the rear cover body, the handle is fixedly mounted on an end of the movable hinge away from the rear cover body, there are two movable hinges installed, and the movable hinges are evenly distributed on the outer side of the rear cover body.

4. The anti-leakage valve device for a liquefied petroleum gas transport vehicle according to claim 3, characterized in that: The piston plugging head comprises a plugging head body, a sealing tube, a limiting short rod and a threaded long rod.

5. The anti-leakage valve device for a liquefied petroleum gas transport vehicle according to claim 4, characterized in that: The plugging head body is arranged inside the valve tube body, the sealing tube is fixedly installed on the outside of the plugging head body, the limiting short rod is movably arranged inside the plugging head body, the threaded long rod is fixedly installed on the rear end of the limiting short rod, the rear end of the threaded long rod passes through the threaded through hole of the rear cover body, and an annular groove is opened on the outside of the sealing tube.

6. The anti-leakage valve device for a liquefied petroleum gas transport vehicle according to claim 5, characterized in that: The movable power frame comprises a U-shaped guide rail frame, a limit sliding frame, a forward and reverse motor, a limit tube and an electric telescopic rod.

7. The anti-leakage valve device for a liquefied petroleum gas transport vehicle according to claim 6, characterized in that: The U-shaped guide rail frame is fixedly installed on the rear surface of the rear cover body, the limit sliding frame is arranged inside the U-shaped guide rail frame, the forward and reverse motor is fixedly installed inside the limit sliding frame, the limit tube is fixedly installed on the rear surface of the forward and reverse motor, the electric telescopic rod is fixedly installed inside the through hole on the upper surface of the U-shaped guide rail frame, the front end of the forward and reverse motor is fixedly connected to the rear end of the threaded long rod, the lower end of the electric telescopic rod passes through the inside of the limit tube, and the lower end of the electric telescopic rod is inserted into the through hole on the lower surface of the U-shaped guide rail frame.

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