Quick charge / discharge valve

Abstract

A rapid inflation / deflation valve includes a valve body and a slide block. The outer wall of the valve body has three axially spaced sets of seals, with first and second air holes located between the first and second sets of seals, and the second and third sets of seals, respectively. The slide block is fitted over the valve body, with an air groove on its inner wall that slides in contact with the seals. The slide block has three positions: closed, inflated, and deflated. This invention completely eliminates the internal valve core, achieving continuous unidirectional switching of the three positions through an external slide valve structure. The minimum cross-sectional area of ​​the inflation / deflation passage can reach over 5.3 square millimeters, and the theoretical inflation speed is more than four times that of traditional valve core structures. This achieves rapid inflation / deflation with high flow rates, smooth airflow, low resistance, and convenient state switching operation.

Description

Technical Field

[0001] This utility model relates to a tire valve, specifically a fast inflation / deflation valve. Background Technology

[0002] Tire valves are the core components used for tire inflation, deflation, and maintaining airtightness. Currently, common tire valves (such as those widely used in traditional bicycle, motorcycle, and automobile tires) all contain a valve core. The valve core is a one-way valve structure, composed of precision components such as a spring, core rod, and sealing gasket, allowing only one direction of gas flow into the tire to prevent backflow and leakage. However, this traditional structure has inherent technical drawbacks: 1. Due to the complex internal structure of the valve core, the cross-sectional area of ​​its effective air passage is very limited. The maximum cross-sectional area of ​​the air passage in a common traditional valve core is only about 1.3 square millimeters. At the same time, internal components such as springs and levers also significantly obstruct airflow, resulting in poor air passage and slow inflation and deflation speeds. When it is necessary to quickly inflate tires or deflate off-road tires, the process takes a long time. 2. The narrow and tortuous airway results in high air resistance, which will put an extra load on the air pump during inflation and will significantly reduce the lifespan of the air pump with prolonged use. 3. If a large amount of air needs to be released quickly, it is usually necessary to use tools to unscrew the entire valve core, which is extremely inconvenient.

[0003] Although existing technologies (such as CN220452760U) have disclosed a high-flow air nozzle solution that switches the air passage opening and closing by axial movement of an external sliding sleeve, eliminating the internal valve core, in terms of operation, it is not possible to sequentially switch between the three states of "closing-inflating-deflating" by continuous movement of the slide in a single direction. There is still room for improvement in terms of operational convenience and functionality. Utility Model Content

[0004] The present invention aims to provide a fast inflation / deflation valve to solve the problems of narrow air passage and low inflation / deflation efficiency caused by the traditional valve core structure, and further optimize the operation logic to improve ease of use.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a fast inflation / deflation valve, comprising a valve body and a slide block. The valve body has a first air passage and a second air passage inside, the second air passage being used to connect to the inner cavity of a tire. A first air hole communicating with the first air passage and a second air hole communicating with the second air passage are provided on the outer wall of the valve body. Three sets of sealing elements are provided on the outer wall of the valve body at axial intervals. The first air hole is located between the first set of sealing elements and the second set of sealing elements, and the second air hole is located between the second set of sealing elements and the third set of sealing elements. The slide block is axially slidably fitted onto the valve body, and its inner wall has a venting groove, which slides and seals with each of the sealing elements. The slide block, through axial movement, allows the venting groove to selectively connect or disconnect the first air hole and the second air hole. The slide is configured to have a closed position, an inflated position, and a deflated position. In the closed position, the inner wall of the slide is in sealing contact with both the second and third sets of seals, so that the vent groove only connects to the second vent, and the first vent is blocked by the inner wall of the slide and the first and second sets of seals. In the inflated position, the slide moves axially, so that the slide is in sealing contact with the first and third sets of seals at both ends of the vent groove, respectively, and the vent groove covers and connects the first vent and the second vent. In the deflated position, the slide moves further in the same direction relative to the inflated position, so that the end of the slide facing the second air passage is disengaged from the sealing contact with the third set of seals, forming a venting gap, through which the second vent communicates with the external atmosphere.

[0006] Preferably, the valve body is provided with an outwardly protruding positioning step on the lower side of the second air hole. The positioning step is located on the lower side of the seal below the second air hole, and a rubber pad is provided on the end face of the positioning step. When the slide is in the closed position, the corresponding end of the slide abuts against the rubber pad.

[0007] Preferably, the valve body is further provided with an outwardly protruding locking step on the upper side of the first air hole. The locking step is located on the upper side of the seal on the upper side of the first air hole, and the locking step has a guide slope. A positioning spring is engaged on the upper side of the locking step on the valve body. A second sealing ring is provided on the inner end of the slide facing the first air passage. When the slide is in the inflation position, the second sealing ring abuts against the locking step to limit the inflation position. When the slide is in the deflation position, the end of the slide abuts against the positioning spring.

[0008] Preferably, the valve body also includes a cap, wherein one end of the outer wall of the valve body is provided with an external thread, and the cap is screwed into the external thread; when the slide is in the closed position, the end of the tightened cap abuts against the end of the slide.

[0009] Preferably, the sealing element includes a sealing ring protruding outward from the outer wall of the valve body, and a first sealing ring fitted on the sealing ring.

[0010] The beneficial effects of this utility model are: 1. By completely eliminating the internal valve core and adopting a slide valve structure that matches the external slide seat with the air passage hole, the minimum cross-sectional area of ​​the entire inflation / deflation passage can reach more than 5.3 square millimeters. The theoretical inflation speed is more than 4 times that of the traditional valve core structure, realizing truly large-flow rapid inflation and deflation. 2. Due to the wide air passage and the lack of internal obstruction, the air in the tire can be discharged directly through the second air passage, the second air hole, the air groove, and then through the gap between the slide and the third set of seals or through the first air hole and the first air passage. The deflation efficiency is extremely high, which solves the problem of slow deflation of traditional valves. 3. The large-flow air path design with no other internal components obstructing the air path significantly reduces air resistance and ensures smooth air flow. This not only speeds up the inflation process but also effectively reduces the workload of the air pump during inflation, which helps to significantly extend the service life of the air pump. 4. Users only need to push the slide along the axis to switch between different positions to achieve the three functions of closing, inflating, and deflating. In particular, from the inflating state to the deflating state, you only need to push the slide further in the same direction. The operation is intuitive and smooth, without the need for reciprocating bidirectional operation or tools as required by existing technologies, which greatly improves the user experience. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the usage state of an embodiment of this utility model; Figure 2 This is a schematic diagram of the split state of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the closed position of the slide in an embodiment of the present invention; Figure 4 This is a schematic diagram of the slide inflation position according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the air venting position of the slide in an embodiment of this utility model.

[0012] In the diagram: 1. Wheel rim; 2. Cap; 3. Positioning circlip; 4. Slide; 5. First sealing ring; 6. External thread; 7. Valve body; 8. Rubber gasket; 9. Nut; 10. First screw section; 11. First air passage; 12. First air hole; 13. Vent groove; 14. Second air hole; 15. Second air passage; 16. Positioning step; 17. Sealing convex ring; 18. Tire; 19. Positioning step; 20. Guide slope; 21. Second sealing ring. Detailed Implementation

[0013] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. Example

[0014] like Figures 1 to 2 The illustrated quick-charge / de-charge valve includes a valve body 7 and a slide 4. The valve body 7 may be made of brass or aluminum alloy, and the slide 4 may be made of engineering plastic or metal. One end of the valve body 7 has a first threaded portion 10 for passing through the rim 1 and the tire 18 on the rim 1 and being screwed onto a nut 9, and the other end has an external thread 6 for screwing onto a cap 2. During installation, the valve body 7 can be inserted through the first threaded portion 10 into the mounting hole of the rim 1 and locked in place with the nut 9.

[0015] The valve body 7 has an axially extending first air passage 11 and second air passage 15 inside. The first air passage 11 communicates with the upper opening, and the second air passage 15 communicates with the lower opening and ultimately leads to the inner cavity of the tire 18. The outer wall of the valve body 7 has a radially extending first air hole 12 and second air hole 14, wherein the first air hole 12 communicates with the first air passage 11, and the second air hole 14 communicates with the second air passage 15. To further increase the flow area and improve the inflation / deflation efficiency, multiple first air holes 12 and second air holes 14 can be provided along the circumference of the valve body 7, preferably four.

[0016] The outer wall of the valve body 7 is provided with three sets of axially spaced sealing elements. In one specific embodiment, each set of sealing elements consists of a sealing ring 17 protruding outward from the outer wall of the valve body 7 and a first sealing ring 5 fitted onto it. To ensure the installation stability of the first sealing ring 5, a sealing groove can be formed on the outer wall of the sealing ring 17 along its circumference, and the first sealing ring 5 is embedded in the sealing groove. The first sealing ring 5 is made of nitrile rubber or silicone. The three sets of sealing elements separate the outer wall space, with the first air hole 12 located between the first and second sets of sealing elements, and the second air hole 14 located between the second and third sets of sealing elements.

[0017] The slide 4 is sleeve-shaped and can be axially slidably fitted onto the valve body 7. An annular vent groove 13 is formed on the inner wall of the slide 4, the inner diameter of which is larger than the diameter of the holes on the inner walls of the slide 4 at both ends. The inner wall surface of the slide 4 achieves a sliding sealing fit with the first sealing ring 5 on each sealing element.

[0018] On the lower side of the seal (third set of seals) below the second air hole 14, a positioning step 16 protrudes outward on the valve body 7, and a rubber gasket 8 is installed on the end face of the positioning step 16. On the upper side of the seal (first set of seals) above the first air hole 12, a locking step 19 protrudes outward on the valve body 7, and the locking step 19 has a guide slope 20. On the upper side of the locking step 19, a positioning spring 3 is also engaged on the valve body 7. In addition, a second sealing ring 21 is embedded in the inner end of the slide 4 facing upward (on the side of the first air passage 11), and the inner diameter of the second sealing ring 21 is adapted to the outer diameter of the valve body 7. The second sealing ring 21 can also be made of nitrile rubber or silicone.

[0019] The working process and principle of this embodiment are as follows: Closed state: such as Figure 3 As shown, push the slide 4 downwards so that its lower end abuts against the rubber pad 8 of the positioning step 16. At this time, the valve is in a closed state. The inner wall of the slide 4 keeps in sealed contact with the first sealing ring 5 of the second and third sets of seals. At this time, the vent groove 13 is only connected to the second air hole 14, while the second air hole 14 and the first air hole 12 are blocked by the inner wall of the slide 4 and the corresponding sealing ring. In this closed position, although the vent groove 13 is connected to the second air hole 14, the first air hole 12 is blocked by the inner wall of the slide 4 and the first and second sets of seals. Since the first air passage 11 is not connected to an external air source, the system remains sealed. The gas in the inner cavity of the tire 18 cannot leak out. To further ensure the airtightness of the closure, the cap 2 can be screwed onto the external thread 6 so that the lower end of the cap 2 is tightly pressed against the upper end of the slide 4, applying axial pressure.

[0020] Inflation status: such as Figure 4As shown, when the slide block 4 is pushed upward, and the second sealing ring 21 on the slide block 4 slides to the guide slope 20 of the locking step 19 and forms an abutment with it, the slide block 4 is precisely positioned in the inflation position. At this time, the slide block 4 forms a seal with the first sealing ring 5 of the first group and the third group of seals at both ends of the axial direction of the venting groove 13, so that the venting groove 13 forms a sealed chamber, which covers and connects the first air hole 12 and the second air hole 14. At this time, when an external high-pressure air source is connected to the first air passage 11, the gas can be quickly inflated into the tire through the first air passage 11, the first air hole 12, the venting groove 13, the second air hole 14 and the second air passage 15 in sequence. Conversely, when there is no external high-pressure air source, the gas in the tire cavity will also be discharged through the second air passage 15, the second air hole 14, the venting groove 13, the first air hole 12 and the first air passage 11.

[0021] Deflated state: such as Figure 5 As shown, based on the inflation position, continue to push the slide 4 in the same direction (upward) to overcome the contact force between the second sealing ring 21 and the locking step 19 until the upper end of the slide 4 hits the positioning spring 3. At this position, the lower end of the slide 4 has disengaged from the sealing contact with the first sealing ring 5 of the third set of seals, forming a venting gap. Most of the high-pressure gas in the tire will flow out through the second air passage 15 and the second air hole 14, and be quickly discharged into the outside atmosphere through this venting gap. At the same time, since the venting groove 13 is still connected to the first air hole 12 and the second air hole 14, some gas will also follow the opposite direction of the inflation path and be discharged through the first air passage 11, thus achieving rapid deflation.

[0022] As can be seen from the above operation, users only need to push the slide block 4 in one direction to achieve a smooth switch from "closing" to "inflating" and then to "deflating," making the operation intuitive and convenient. At the same time, since there is no valve core obstruction inside, the minimum cross-sectional area of ​​the air passage in this solution can reach more than 5.3 square millimeters, and the theoretical inflation speed is more than 4 times that of traditional valves, achieving high-flow and high-efficiency inflation and deflation.

Claims

1. A quick-inflation valve, comprising a valve body (7) and a slide (4), wherein the valve body (7) has a first air passage (11) and a second air passage (15) inside, the second air passage (15) being used to connect to the inner cavity of a tire (18), and a first air hole (12) communicating with the first air passage (11) and a second air hole (14) communicating with the second air passage (15) are provided on the outer wall of the valve body (7), characterized in that: The outer wall of the valve body (7) is provided with three sets of sealing elements arranged at intervals along the axial direction. The first air hole (12) is located between the first set of sealing elements and the second set of sealing elements, and the second air hole (14) is located between the second set of sealing elements and the third set of sealing elements. The slide block (4) is axially slidably sleeved on the outside of the valve body (7), and its inner wall is provided with a ventilation groove (13), which is slidably sealed with each of the sealing elements; The slide (4) is configured to have a closed position, an inflated position and a deflated position; In the closed position, the inner wall of the slide (4) is in sealing contact with both the second set of seals and the third set of seals, so that the vent groove (13) is connected only to the second vent (14), and the first vent (12) is blocked by the inner wall of the slide (4) and the first set of seals and the second set of seals; In the inflation position, the slide (4) moves axially, so that the slide (4) makes sealing contact with the first set of seals and the third set of seals at both ends of the axial direction of the vent groove (13), and the vent groove (13) covers and connects the first air hole (12) and the second air hole (14). In the deflation position, the slide (4) moves further in the same direction relative to the inflation position, so that the end of the slide (4) facing the second air passage (15) is disengaged from the sealing contact with the third set of seals, forming a venting gap, through which the second air hole (14) communicates with the outside atmosphere.

2. The quick inflate and deflate valve stem cap of claim 1, wherein: The valve body (7) is provided with an outwardly protruding positioning step (16) on the lower side of the second air hole (14). The positioning step (16) is located on the lower side of the seal on the lower side of the second air hole (14), and a rubber pad (8) is provided on the end face of the positioning step (16). When the slide (4) is in the closed position, the corresponding end of the slide (4) abuts against the rubber pad (8).

3. The quick fill and deflate valve stem of claim 1, wherein: The valve body (7) is provided with an outwardly protruding locking step (19) on the upper side of the first air hole (12). The locking step (19) is located on the upper side of the seal on the upper side of the first air hole (12), and the locking step (19) has a guide slope (20). A positioning spring (3) is engaged on the upper side of the locking step (19) on the valve body (7). A second sealing ring (21) is provided on the inner end of the slide (4) facing the first air passage (11). When the slide (4) is in the inflation position, the second sealing ring (21) abuts against the locking step (19) to limit the inflation position. When the slide (4) is in the deflation position, the end of the slide (4) abuts against the positioning spring (3).

4. The quick fill and deflate valve stem of claim 1, wherein: It also includes a cap (2), and one end of the valve body (7) is provided with an external thread (6), and the cap (2) is screwed to the external thread (6); when the slide (4) is in the closed position, the end of the tightened cap (2) abuts against the end of the slide (4).

5. The quick inflate and deflate valve according to claim 1, wherein: The sealing element includes a sealing ring (17) protruding outward from the outer wall of the valve body (7), and a first sealing ring (5) sleeved on the sealing ring (17).

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