Leakproof tire valve with multilayer seal

Abstract

The utility model discloses a kind of air leakage prevention tire valve of multilayer sealing structure, it is related to tire valve field, including valve body, valve cap is installed on valve body, the outer end of valve cap is fixedly installed with mounting bracket, mounting bracket is composed of base plate and connecting plate, connecting plate has two and is symmetrically fixedly installed in the inner end of base plate, rubber plug post is fixedly embedded in valve cap, valve cap, mounting bracket and rubber plug post are installed with one extrusion sealing element, extrusion sealing element is composed of extruding block, screw and knob, screw is fixedly installed in the upper end of extruding block, knob is fixedly installed in the upper end of screw, by setting rubber plug post and the mounting bracket of the connecting plate and base plate on valve cap, and setting the extrusion sealing element of the knob and screw and extruding block, cooperate with valve core in valve cap and valve body, form multilayer sealing structure, to reduce the probability of tire air leakage finally.

Description

Technical Field

[0001] This utility model relates to the field of tire valves, and in particular to a leak-proof tire valve with a multi-layer sealing structure. Background Technology

[0002] The tire valve is a key component connecting the tire to the inflation system, primarily used for inflating and deflating the tire and maintaining stable internal tire pressure. It is widely used in tire systems of various vehicles such as automobiles, bicycles, and motorcycles. Its core function relies on a well-designed sealing structure to ensure that the tire pressure does not drop due to gas leakage during long-term use, thus guaranteeing driving safety and tire lifespan. The sealing structure of a tire valve typically consists of several parts working together, generally including the valve body, valve core, and valve cap. The valve core is the core of the seal, containing a spring and a sealing gasket. The spring's elasticity ensures the sealing gasket fits tightly against the valve seat, forming the first line of defense against gas leakage from the valve body. The valve cap is threaded onto the outer end of the valve body and often contains a rubber sealing ring. When screwed onto the valve body, it provides external protection for the valve core. Simultaneously, the compression of the sealing ring creates a second seal, preventing dust, moisture, and other impurities from entering the valve and affecting the sealing performance, and also contributing to preventing gas leakage.

[0003] However, traditional tire valves still have a chance of leaking air over long-term use. On one hand, the valve core's sealing gasket gradually wears down during repeated inflation and deflation, reducing the seal between it and the valve seat and leading to slow leaks. On the other hand, the threaded connection between the valve cap and the valve body may loosen due to vibration, impact, or other factors, weakening the compression effect on the rubber seal and preventing it from effectively providing an auxiliary seal, thus causing air leakage. These leaks not only affect the normal use of the tire but may also pose a potential threat to driving safety. Utility Model Content

[0004] The main purpose of this utility model is to provide a leak-proof tire valve with a multi-layer sealing structure, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A multi-layer sealing structure for leak-proof tire valve includes a valve body, a valve cap mounted on the valve body, a mounting bracket fixedly mounted on the outer end of the valve cap, the mounting bracket consisting of a base plate and a connecting plate, two connecting plates symmetrically fixedly mounted on the inner end of the base plate, a rubber plunger fixedly embedded in the valve cap, and a compression sealing element mounted on the valve cap, mounting bracket, and rubber plunger. The compression sealing element consists of a compression block, a screw, and a knob, the screw being fixedly mounted on the upper end of the compression block, and the knob being fixedly mounted on the upper end of the screw.

[0007] Preferably, the valve cap is threaded onto the valve stem body, the inner wall of the valve cap has an insert groove, and the outer end of the valve cap has a through hole, the through hole and the insert groove are interconnected.

[0008] Preferably, the connecting plate on the mounting bracket is fixedly installed on the outer end of the valve cap, and the base plate has a threaded hole, which is coaxial with the mounting groove and the through hole.

[0009] Preferably, the rubber plunger is fixedly embedded in the mounting groove and simultaneously inserted into the valve body. The inner end of the rubber plunger has a tapered hole, and the outer end of the rubber plunger has a through groove, which communicates with the tapered hole.

[0010] Preferably, the screw on the extrusion seal is installed in the threaded hole, the knob is located on the outside of the mounting bracket, and the extrusion block is movably inserted into the through hole, through groove, and tapered hole.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] By installing a rubber plunger on the valve cap and a mounting bracket consisting of a base plate and a connecting plate, as well as a compression seal consisting of a compression block, a screw, and a knob, a multi-layer sealing structure is formed in conjunction with the valve core inside the valve cap and valve body. In use, the rubber plunger itself forms a seal by cooperating with the valve body. By rotating the knob, the screw rotates, causing the compression block to move within the through hole, through groove, and tapered hole, compressing the tapered portion of the rubber plunger. This causes the rubber plunger to deform, making it tightly adhere to the inner wall of the valve body, further enhancing the seal between it and the valve body. This effectively compensates for the reduced sealing performance of the valve core sealing gasket in traditional valves due to wear. At the same time, the fixed connection between the mounting bracket and the valve cap, as well as the compression seal, reduces the possibility of loosening the seal due to vibration, collision, or other factors. It also avoids the problem of weakened compression effect of the rubber seal ring caused by loose threaded connection between the valve cap and the valve body, thereby ultimately reducing the probability of tire leakage and ensuring normal tire use and driving safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the valve cap, mounting bracket, rubber plunger, and extrusion seal of this utility model, showing their structure relative to the valve body.

[0015] Figure 3 For the present utility model Figure 2 An enlarged structural diagram at point A;

[0016] Figure 4 This is a schematic diagram of the structure of the valve cap, mounting bracket, rubber plunger, and extrusion seal of this utility model after cross-section.

[0017] In the diagram: 1. Valve body; 2. Valve cap; 3. Mounting bracket; 4. Rubber plunger; 5. Extrusion seal; 6. Insert groove; 7. Through hole; 8. Base plate; 9. Threaded hole; 10. Connecting plate; 11. Through groove; 12. Tapered hole; 13. Extrusion block; 14. Screw; 15. Knob. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a multi-layer sealing structure for leak-proof tire valve includes a valve body 1, a valve cap 2 mounted on the valve body 1, and a mounting bracket 3 fixedly mounted on the outer end of the valve cap 2. The mounting bracket 3 consists of a base plate 8 and a connecting plate 10. Two connecting plates 10 are symmetrically fixedly mounted on the inner end of the base plate 8. A rubber plunger 4 is fixedly embedded inside the valve cap 2. A compression sealing element 5 is mounted on the valve cap 2, the mounting bracket 3, and the rubber plunger 4. The compression sealing element 5 consists of a compression block 13, a screw 14, and a knob 15. The screw 14 is fixedly mounted on the upper end of the compression block 13, and the knob 15 is fixedly mounted on the upper end of the screw 14. By setting the rubber plunger 4 on the valve cap 2, the mounting bracket 3 composed of the base plate 8 and the connecting plate 10, and the compression sealing element 5 composed of the compression block 13, the screw 14, and the knob 15, in conjunction with the valve cap 2 and the valve core inside the valve body 1, a multi-layer sealing structure is formed. In use, the rubber plunger 4 forms a seal by cooperating with the valve body 1. By rotating the knob 15, the screw 14 rotates, causing the extrusion block 13 to move within the through hole 7, through groove 11, and conical hole 12, extruding the conical hole 12 portion of the rubber plunger 4. This causes the rubber plunger 4 to deform, making it tightly adhere to the inner wall of the valve body 1, further enhancing the seal between it and the valve body 1. This effectively compensates for the reduced sealing performance of the valve core sealing gasket in traditional valves due to wear. At the same time, the fixed connection between the mounting bracket 3 and the valve cap 2, as well as the setting of the extrusion seal 5, can reduce the loosening of the seal due to vibration, collision, and other factors. This avoids the problem of weakened extrusion effect of the rubber sealing ring caused by loose threaded connection between the valve cap 2 and the valve body 1, thereby ultimately reducing the probability of tire leakage and ensuring normal tire use and driving safety.

[0020] Specifically, the valve cap 2 is threaded onto the valve body 1. An insert groove 6 is formed on the inner wall of the valve cap 2, and a through hole 7 is formed at the outer end of the valve cap 2, communicating with the insert groove 6. A connecting plate 10 on the mounting bracket 3 is fixedly installed at the outer end of the valve cap 2. A threaded hole 9 is formed on the base plate 8, coaxial with the insert groove 6 and the through hole 7. A rubber plug 4 is fixedly embedded in the insert groove 6 and simultaneously inserted into the valve body 1. A tapered hole 12 is formed at the inner end of the rubber plug 4, and a through groove 11 is formed at the outer end of the rubber plug 4, communicating with the tapered hole 12. A screw 14 on the compression seal 5 is installed in the threaded hole 9. A knob 15 is located outside the mounting bracket 3. A compression block 13 is movably inserted into the through hole 7, the through groove 11, and the tapered hole 12. The inner end of the compression block 13 is a tapered structure, which is connected to the rubber plug 4. The conical hole 12 is adapted to the valve body. When the knob 15 is rotated to drive the screw 14 forward, the conical inner end of the extrusion block 13 can fit more closely into the conical hole 12. As the extrusion block 13 continues to move, its conical surface generates a uniform and gradually increasing extrusion force on the inner wall of the conical hole 12, thereby more effectively causing the rubber plug 4 to deform and ensuring that the rubber plug 4 can fit tightly against the inner wall of the valve body 1. The material of the rubber plug 4 is usually selected as a rubber material with good elasticity and sealing properties, such as nitrile rubber. This material not only has excellent oil resistance and wear resistance, and can adapt to substances such as grease that may come into contact with the tire in the tire use environment, but also can produce stable deformation when squeezed, ensuring a tight fit with the inner wall of the valve body 1. At the same time, it has a certain degree of aging resistance, which can maintain a good sealing state during long-term use and reduce the sealing failure problem caused by material aging.

[0021] During installation and use, first ensure that the valve body 1 is installed in the preset position on the tire. At this time, the valve core inside the valve body 1 forms the first basic seal. Then, lift the valve cap 2 and align its inner thread with the outer thread of the valve body 1. Then, rotate the valve cap 2 until it is tightly connected to the valve body 1. At this time, the rubber plunger 4 inside the valve cap 2 is inserted into the valve body 1 along with the valve cap 2. The rubber plunger 4 initially adheres to the inner wall of the valve body 1 to form the second seal. To further improve the sealing performance, the knob can be rotated. 15. At this time, the screw 14 continues to advance in the threaded hole 9, so that the extrusion block 13 will squeeze the inner wall of the conical hole 12, forcing the rubber plug 4 to deform and tightly fit the inner wall of the valve body 1. If inflation is required during use, first rotate the knob 15 in the opposite direction to make the extrusion block 13 exit from the conical hole 12, release the extrusion of the rubber plug 4, and then unscrew the valve cap 2 to perform the inflation operation. After inflation is completed, reinstall the valve cap 2 and rotate the knob 15 to make the extrusion block 13 squeeze the rubber plug 4 again to form a seal.

[0022] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A leakproof valve for pneumatic tires of the multi-layer sealing structure type, comprising a valve body (1) on which a valve cap (2) is mounted, characterized in that: The valve cap (2) is fixedly mounted with a mounting bracket (3) at its outer end. The mounting bracket (3) consists of a base plate (8) and a connecting plate (10). There are two connecting plates (10) that are symmetrically fixedly mounted on the inner end of the base plate (8). A rubber plug (4) is fixedly embedded in the valve cap (2). A compression seal (5) is installed on the valve cap (2), the mounting bracket (3), and the rubber plug (4). The compression seal (5) consists of a compression block (13), a screw (14), and a knob (15). The screw (14) is fixedly mounted on the upper end of the compression block (13), and the knob (15) is fixedly mounted on the upper end of the screw (14).

2. A multi-layer sealed structure leakproof tire valve according to claim 1, characterized in that: The valve cap (2) is threaded onto the valve body (1). The valve cap (2) has an insert groove (6) on its inner wall and a through hole (7) at its outer end. The through hole (7) is connected to the insert groove (6).

3. The leak-proof tire valve with a multi-layer sealing structure according to claim 2, characterized in that: The connecting plate (10) on the mounting bracket (3) is fixedly installed on the outer end of the valve cap (2). The base plate (8) has a threaded hole (9) which is coaxial with the mounting groove (6) and the through hole (7).

4. The leak-proof tire valve with a multi-layer sealing structure according to claim 3, characterized in that: The rubber plunger (4) is fixedly embedded in the mounting groove (6) and simultaneously inserted into the valve body (1). The inner end of the rubber plunger (4) is provided with a conical hole (12) and the outer end of the rubber plunger (4) is provided with a through groove (11). The through groove (11) and the conical hole (12) are interconnected.

5. The leak-proof tire valve with a multi-layer sealing structure according to claim 4, characterized in that: The screw (14) on the extrusion seal (5) is installed in the threaded hole (9), the knob (15) is located on the outside of the mounting bracket (3), and the extrusion block (13) is movably inserted into the through hole (7), the through groove (11) and the tapered hole (12).

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