Anti-leakage safety valve for LPG device of forklift truck

Abstract

The utility model belongs to the technical field of safety valve, concretely relates to the leakage -proof safety valve of fork truck LPG device, including the main part, the main part top is provided with the leakage valve, the main part bottom is provided with the connecting pipe, the main part right side is provided with the butt -joint pipe, the leakage valve inside is provided with the stop board, the main part inside is provided with the sealing device, the sealing device includes the long rod, the long rod fixed mounting is in the stop board bottom, the long rod bottom fixed mounting has the contact ring, the connecting pipe inside slide installation has the sealing ring, sealing ring inner wall fixed mounting has the fixed block. The utility model solves the problem that it is difficult to ensure that the valve body does not leak before starting pressure relief, thereby preventing liquefied petroleum gas or other gas from leaking from the connecting part when the system is working, ensuring the close fit between the safety valve and the connecting part, effectively avoiding gas leakage under normal or overpressure conditions, and reducing the effect of safety hazards.

Description

Technical Field

[0001] This utility model belongs to the field of safety valve technology, specifically relating to a leak-proof safety valve for forklift LPG devices. Background Technology

[0002] The leak-proof safety valve of the forklift LPG (liquefied petroleum gas) unit is a critical safety component designed to prevent liquefied petroleum gas from leaking during equipment operation and ensure the safe use of the forklift.

[0003] Chinese Patent Publication No. CN214889165U discloses a pressure-resistant, leak-proof safety valve, comprising a safety valve body, multiple screws, and multiple nuts. An annular plate is fitted around the outer end of the safety valve body, and multiple internal hexagonal grooves are formed at the bottom end of the annular plate. The screws are located at the bottom of the annular plate and extend into the internal hexagonal grooves. Multiple fixing plates are fixedly mounted on the outer end of the annular plate, and a connecting rod passes through the top of each fixing plate. A positioning plate is fitted around the outer end of the connecting rod, and a groove is formed at the top of the positioning plate. An adaptation mechanism is provided inside the groove, and the nuts are located inside the adaptation mechanism. This invention uses the internal hexagonal grooves at the bottom end of the annular plate to fix the screws, and then uses the adaptation mechanism to fix the nuts, preventing them from rotating. Once fixed, the screws and nuts will not rotate and will not loosen, thus preventing media leakage at the flange connection between the safety valve body and the equipment or pipeline, resulting in high safety.

[0004] Based on the above review of leak-proof safety valves, the following problems exist: it is difficult to ensure that the valve body will not leak before the pressure is released when the leak-proof safety valve starts to release pressure. This can easily lead to leakage in the valve body before the pressure is released, resulting in damage to the valve body. Therefore, we propose a leak-proof safety valve for forklift LPG devices. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof safety valve for forklift LPG devices, which can solve the problem in related technologies that it is difficult to ensure that the valve body will not leak before the pressure is released.

[0006] The specific technical solution adopted by this utility model is as follows:

[0007] A leak-proof safety valve for a forklift LPG unit includes a main body, a leak valve at the top of the main body, a connecting pipe at the bottom of the main body, a connecting pipe on the right side of the main body, a leak stop plate inside the leak valve, and a sealing device inside the main body.

[0008] The sealing device includes a long rod, which is fixedly installed at the bottom of the stop plate. A contact ring is fixedly installed at the bottom of the long rod. A sealing ring is slidably installed inside the connecting pipe. A fixing block is fixedly installed on the inner wall of the sealing ring. A limiting plate is fixedly installed inside the main body. A fixing plate is also fixedly installed inside the main body. When the stop plate moves under pressure to open the valve, it simultaneously moves the long rod. The movement of the long rod causes the contact ring to move. The moving contact ring contacts and pushes the fixing block to move. The movement of the fixing block causes the sealing ring to move.

[0009] The contact ring contacts the fixed block, and the sealing ring contacts the inner wall of the connecting pipe. The contact ensures that the contact ring can drive the fixed block to move, and the contact ensures that the sealing ring can seal correctly.

[0010] The long rod slides through the fixed plate, and a first spring is provided between the limiting plate and the fixed block. The sliding through ensures that the long rod will not move excessively, and the first spring ensures that the fixed block can achieve self-reset.

[0011] The connecting pipe is equipped with an anti-clogging device, which includes a connecting plate. The connecting plate is fixedly installed on the circumferential surface of the long rod. An inclined rod is fixedly installed on the side of the connecting plate near the connecting pipe. A slide rail is fixedly installed on the inner wall of the connecting pipe. A porous filter plate is slidably installed inside the slide rail. A fixing rod is fixedly installed on the side of the porous filter plate near the main body. An inclined block is fixedly installed at the bottom of the fixing rod. A horizontal block is fixedly installed at the end of the slide rail near the main body. The long rod moves, causing the contact ring to move, which in turn moves the connecting plate. The moving connecting plate moves the inclined rod, which contacts and pushes the inclined block to move. The moving inclined block moves the fixing rod, which in turn moves the porous filter plate along the extension direction of the slide rail.

[0012] The inclined rod and the inclined block are both set as inclined surfaces. The porous filter plate is in contact with the inner wall of the connecting pipe. The inclined surfaces ensure that the inclined rod can smoothly push the inclined block when it moves, and the contact ensures that the porous filter plate can filter correctly.

[0013] A second spring is provided between the horizontal block and the porous filter plate to ensure that the porous filter plate can achieve self-reset.

[0014] The technical effects achieved by this utility model are as follows:

[0015] 1. This utility model, through the setting of a sealing device, allows the sealing ring to move and seal the area where the connecting pipe and the connecting parts are connected, preventing liquefied petroleum gas or other gases from leaking from the connection part when the system is working, ensuring a tight fit between the safety valve and the connecting parts, effectively avoiding gas leakage under normal or overpressure conditions, and reducing safety hazards.

[0016] 2. This utility model, through the setting of the anti-clogging device, makes the porous filter plate move and disconnect from the connecting pipe, so that it no longer filters the liquefied petroleum gas or other gases in the system. This reduces the resistance of gas flow and increases the flow rate, which helps to quickly release excess gas when the pressure is too high. This effectively prevents equipment damage or safety accidents caused by overpressure, and helps to complete the pressure release more quickly, preventing the pressure from continuing to rise and causing other safety problems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the structure of the main body and the connecting pipe of this utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of the structure of the sealing device of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the structure at the junction of the long rod and the fixing plate of this utility model;

[0021] Figure 5 This is a cross-sectional schematic diagram of the structure of the anti-clogging device of this utility model.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Main body; 2. Leakage valve; 3. Connecting pipe; 4. Connecting pipe; 5. Leakage stop plate; 6. Sealing device; 601. Long rod; 602. Contact ring; 603. Sealing ring; 604. Fixing block; 605. Limiting plate; 606. Spring No. 1; 607. Fixing plate; 7. Anti-clogging device; 701. Connecting plate; 702. Inclined rod; 703. Slide rail; 704. Porous filter plate; 705. Fixing rod; 706. Inclined block; 707. Horizontal block; 708. Spring No. 2. Detailed Implementation

[0024] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0025] like Figure 1-5 As shown, the leak-proof safety valve of the forklift LPG device includes a main body 1, a leak valve 2 at the top of the main body 1, a connecting pipe 3 at the bottom of the main body 1, a connecting pipe 4 on the right side of the main body 1, a leak stop plate 5 inside the leak valve 2, and a sealing device 6 inside the main body 1.

[0026] The sealing device 6 includes a long rod 601, which is fixedly installed at the bottom of the leak-proof plate 5. A contact ring 602 is fixedly installed at the bottom of the long rod 601. A sealing ring 603 is slidably installed inside the connecting pipe 3. A fixing block 604 is fixedly installed on the inner wall of the sealing ring 603. A limiting plate 605 and a fixing plate 607 are fixedly installed inside the main body 1. The sealing ring 603 moves to seal the area where the connecting pipe 3 is connected to the connecting parts, preventing liquefied petroleum gas or other gases from leaking from the connection part when the system is working. This ensures a tight fit between the safety valve and the connecting parts, effectively avoids gas leakage under normal or overpressure conditions, and reduces safety hazards.

[0027] The contact ring 602 contacts the fixed block 604, and the sealing ring 603 contacts the inner wall of the connecting pipe 3. The contact ensures that the contact ring 602 can drive the fixed block 604 to move, and the contact ensures that the sealing ring 603 can seal correctly.

[0028] The long rod 601 slides through the fixed plate 607. A first spring 606 is provided between the limiting plate 605 and the fixed block 604. The sliding through ensures that the long rod 601 will not move excessively, and the first spring 606 ensures that the fixed block 604 can achieve self-reset.

[0029] Working Principle: First, a professional inspector checks the safety valve. After confirming that everything is in order, the safety valve is installed in the designated position. When the device pressure exceeds the set safety range due to various reasons during operation, the spring inside the safety valve will be subjected to pressure and deform. At this time, the check plate 5 inside the leakage valve 2 begins to move under pressure, opening the valve and relieving pressure inside the valve body. As the check plate 5 moves under pressure to open the valve, it drives the long rod 601 to move. The movement of the long rod 601 drives the contact ring 602 to move. The contact ring 602 contacts and pushes the fixed block 604 to move. The movement of the fixed block 604 drives the sealing ring 603 to move. The movement of the sealing ring 603 seals the area where the connecting pipe 3 is connected to the connecting parts, preventing liquefied petroleum gas or other gases from leaking from the connection part during system operation. This ensures a tight fit between the safety valve and the connecting parts, effectively avoiding gas leakage under normal or overpressure conditions and reducing safety hazards.

[0030] like Figure 1-5As shown, an anti-clogging device 7 is installed inside the connecting pipe 4. The anti-clogging device 7 includes a connecting plate 701, which is fixedly installed on the circumferential surface of the long rod 601. An inclined rod 702 is fixedly installed on the side of the connecting plate 701 near the connecting pipe 4. A slide rail 703 is fixedly installed on the inner wall of the connecting pipe 4. A porous filter plate 704 is slidably installed inside the slide rail 703. A fixing rod 705 is fixedly installed on the side of the porous filter plate 704 near the main body 1. An inclined block 706 is fixedly installed at the bottom of the fixing rod 705. A cross block 707 is fixedly installed at the end of the slide rail 703 near the main body 1. By moving the porous filter plate 704, it disengages from the connecting pipe 4 and no longer filters the liquefied petroleum gas or other gases in the system. This reduces the resistance to gas flow and increases the flow rate, which helps to quickly release excess gas when the pressure is too high. This effectively prevents equipment damage or safety accidents caused by overpressure and helps to complete pressure release more quickly, preventing the pressure from continuing to rise and causing other safety problems.

[0031] The inclined rod 702 and the inclined block 706 are both set as inclined surfaces when they contact each other. The porous filter plate 704 contacts the inner wall of the connecting pipe 4. By setting the inclined surfaces, it is ensured that the inclined rod 702 can smoothly push the inclined block 706 when it moves. The contact ensures that the porous filter plate 704 can filter correctly.

[0032] A second spring 708 is provided between the horizontal block 707 and the porous filter plate 704. The second spring 708 ensures that the porous filter plate 704 can achieve self-reset.

[0033] Working principle: As the long rod 601 moves, it drives the contact ring 602 to move, which in turn drives the connecting plate 701 to move. The moving connecting plate 701 drives the inclined rod 702 to move. The inclined rod 702 contacts and pushes the inclined block 706 to move. The moving inclined block 706 drives the fixed rod 705 to move. The moving fixed rod 705 drives the porous filter plate 704 to move along the extension direction of the slide rail 703. The porous filter plate 704 moves and disengages from the connecting pipe 4, no longer filtering liquefied petroleum gas or other gases in the system. This reduces the resistance to gas flow and increases the flow rate, which helps to quickly release excess gas when the pressure is too high. This effectively prevents equipment damage or safety accidents caused by overpressure and helps to complete pressure release more quickly, preventing the pressure from continuing to rise and causing other safety problems.

[0034] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A leak-proof safety valve for a forklift LPG unit, characterized in that: Includes a main body (1), a leakage valve (2) is provided on the top of the main body (1), a connecting pipe (3) is provided on the bottom of the main body (1), a connecting pipe (4) is provided on the right side of the main body (1), a leak stop plate (5) is provided inside the leakage valve (2), and a sealing device (6) is provided inside the main body (1); The sealing device (6) includes a long rod (601), which is fixedly installed at the bottom of the leak-proof plate (5). A contact ring (602) is fixedly installed at the bottom of the long rod (601). A sealing ring (603) is slidably installed inside the connecting pipe (3). A fixing block (604) is fixedly installed on the inner wall of the sealing ring (603). A limiting plate (605) is fixedly installed inside the main body (1). A fixing plate (607) is fixedly installed inside the main body (1).

2. A leak-proof safety valve for a forklift LPG device according to claim 1, characterized in that: The contact ring (602) contacts the fixing block (604), and the sealing ring (603) contacts the inner wall of the connecting pipe (3).

3. A leak-proof safety valve for a forklift LPG device according to claim 1, characterized in that: The long rod (601) slides through the fixed plate (607), and a first spring (606) is provided between the limiting plate (605) and the fixed block (604).

4. The forklift LPG apparatus leak-proof safety valve according to claim 1, characterized by: An anti-clogging device (7) is provided inside the connecting pipe (4). The anti-clogging device (7) includes a connecting plate (701). The connecting plate (701) is fixedly installed on the circumferential surface of the long rod (601). An inclined rod (702) is fixedly installed on the side of the connecting plate (701) near the connecting pipe (4). A slide rail (703) is fixedly installed on the inner wall of the connecting pipe (4). A porous filter plate (704) is slidably installed inside the slide rail (703). A fixing rod (705) is fixedly installed on the side of the porous filter plate (704) near the main body (1). An inclined block (706) is fixedly installed at the bottom of the fixing rod (705). A horizontal block (707) is fixedly installed at the end of the slide rail (703) near the main body (1).

5. A leak-proof safety valve for a forklift LPG device according to claim 4, characterized in that: The inclined rod (702) and the inclined block (706) are both set as inclined surfaces on the side that are in contact with each other, and the porous filter plate (704) is in contact with the inner wall of the connecting pipe (4).

6. A leak-proof safety valve for a forklift LPG device according to claim 4, characterized in that: A second spring (708) is provided between the cross block (707) and the porous filter plate (704).

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