High-sealing inflating valve

Abstract

The utility model discloses a high leakproofness inflating valve which comprises an inflating valve body and a valve core assembly, the inflating valve body is provided with a through air passage, the valve core assembly is used for movably sealing the air passage, the valve core assembly comprises a fixing piece, a core rod and a sealing ring, and the fixing piece and the inflating valve body are fixed in a sealing mode. The fixing piece is arranged in the valve body and provided with a movable hole communicated with the air channel, an inclined sealing face is arranged on the inner side wall of the movable hole, the sealing ring is arranged at the lower end of the core rod and matched with the core rod in a sealing mode, the sealing ring is movably arranged in the movable hole and can be matched with the sealing face in a sealing mode, and an elastic pressing piece forcing the sealing ring to be tightly attached to the sealing face is further arranged in the valve body. The core rod, the sealing ring and the sealing face are matched, the sealing effect of the inflating valve is achieved under the action of the elastic pressing piece, and reliable contact between the inclined sealing face and the sealing ring can be guaranteed; in other words, the sealing ring can still have a reliable contact area with the sealing face after being used for a long time and abraded, reliable sealing is achieved under the action of the elastic pressing piece, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of air valves, in particular to an air valve with high sealing performance. Background Art

[0002] The valve is an independent valve body device that allows gas to enter the tire or inner tube when it is opened, and then automatically closes and seals to preserve the gas and thus ensure the air pressure in the tire to prevent the gas from escaping the tire or inner tube. With the increasing number of various vehicles, the use of valves is becoming more and more widespread, such as in the tires of bicycles, cars, buses and trucks. Of course, valves can also be used in other products that need to be inflated, such as inflatable beds, inflatable sofas, etc.

[0003] The existing valve mainly includes a body, a valve core, a spring and a sealing gasket. The valve core drives the sealing gasket to cooperate with the body to achieve active sealing, and the spring is used to maintain the sealing pressure. However, in actual use, due to the limited matching position of the sealing gasket and the body, and the wear of the sealing gasket and the body during the matching process, the sealing performance deteriorates, which easily leads to air leakage of the valve. In addition, the existing valve core is provided with a support member to ensure the synchronous movement of the sealing gasket. The support member in the existing design is easy to interfere with the body after the gasket is worn. In order to solve the above problems, the utility model specially proposes a high-sealing valve. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-sealing air valve with a simple structure and good sealing performance.

[0005] In order to solve the above technical problems, the utility model solves the problems through the following technical solutions: a high-sealing valve, comprising a valve body and a valve core assembly, the valve body being provided with an air passage running through it, the valve core assembly being used to movably seal the air passage, the valve core assembly comprising a fixing part, a core rod and a sealing ring, the fixing part being sealed and fixed to the valve body, and the fixing part being provided with a movable hole connected to the air passage, the inner side wall of the movable hole being provided with an inclined sealing surface, the sealing ring being arranged at the lower end of the core rod and sealingly fitted, the sealing ring being movably arranged in the movable hole, and being able to sealably fit with the sealing surface, an elastic pressing part for forcing the sealing ring to fit tightly with the sealing surface is also provided in the valve body.

[0006] Preferably, the movable hole includes a first air hole, a transition air channel and a second air hole which are arranged in sequence, and the inner wall of the transition air channel is a sealing surface; the advantage is that the first air hole, the transition air channel and the second air hole can ensure reliable connection with the air channel during inflation and deflation.

[0007] Furthermore, the core rod is provided with a support platform, and the sealing ring is nested on the outside of the core rod and located above the support platform; the advantage is that the support platform is convenient for setting the sealing ring, and ensures sealing and anti-slip when it is closely matched with the sealing surface.

[0008] Furthermore, it is characterized in that the core rod is provided with a limit platform located above the support platform, and the sealing ring is arranged between the support platform and the limit platform; the advantage is that the sealing ring can be reliably installed through the set limit platform and the support platform, thereby ensuring the reliability of the matching between the sealing ring and the sealing surface.

[0009] Furthermore, the inner diameter of the sealing ring is smaller than the outer diameter of the support platform, the outer diameter of the sealing ring is larger than the outer diameter of the limit platform, and the diameter of the limit platform is smaller than the aperture of the first air hole; the advantage is that the sealing ring can be prevented from slipping off the core rod by setting the support platform, the outer diameter of the sealing ring is larger than the inner diameter of the limit platform, and the diameter of the limit platform is smaller than the aperture of the first air hole, which can ensure that the sealing ring has a part in contact with the sealing surface, thereby avoiding interference between the limit platform and the sealing surface.

[0010] Preferably, the fixing part is interference fit with the valve body, a sealing groove is provided between the fixing part and the valve body, and a sealing ring is provided in the sealing groove; the advantage is that the interference fit of the fixing part and the valve body can ensure the reliability of the setting of the fixing part, and the cooperation between the sealing groove and the sealing ring can further ensure the sealing between the fixing part and the valve body.

[0011] Preferably, the valve body is provided with a necking, and the upper end of the core rod is provided with a sealing cap that matches the necking; the advantage is that the provided sealing cap makes it easy to press the core rod and thereby drive the sealing ring to separate from the sealing surface, making it easy to charge and discharge air, and the cooperation between the sealing cap and the necking can prevent debris from entering the airway.

[0012] Furthermore, the elastic pressing part is a spring, and the spring is sleeved on the outside of the core rod. The two ends of the spring are respectively pressed against the sealing cap and the fixing part. The advantage is that the core rod can be reliably lifted by the arranged spring, thereby driving the sealing ring to press the cover tightly, thereby ensuring the sealing reliability of the valve mouth.

[0013] Furthermore, a fixing column is arranged between the sealing cap and the core rod, the fixing piece is provided with a limiting sleeve, and the two ends of the spring are respectively arranged on the outside of the fixing column and the limiting sleeve; the advantage is that the setting of the fixing column and the limiting sleeve can ensure the stability of the spring during the compression process to avoid deviation and shaking.

[0014] Compared with the prior art, the utility model has the following beneficial effects: through the cooperation of the core rod, the sealing ring and the sealing surface, and under the action of the elastic pressing piece, the air passage is reliably sealed, thereby realizing the sealing effect of the valve mouth, and the inclined sealing surface can ensure reliable contact with the sealing ring, that is, the sealing ring can still have a reliable contact area with the sealing surface after long-term use and wear and can be reliably sealed under the action of the elastic pressing piece, thereby improving the sealing effect and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0018] Figure 3 This is a schematic diagram of the structure of the valve core assembly of the utility model;

[0019] Figure 4 This is a disassembly diagram of the valve core assembly of the utility model;

[0020] Figure 5 It is a cross-sectional schematic diagram of the fixing member of the utility model. DETAILED DESCRIPTION

[0021] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0022] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0024] As attached Figure 1-5 A high-sealing valve shown includes a valve body 1 and a valve core assembly 2, wherein the valve body 1 is provided with a penetrating airway 1.1, and the valve core assembly 2 is used for movably sealing the airway, wherein the valve core assembly 2 includes a fixing member 2.1, a core rod 2.2 and a sealing ring 2.3, the fixing member 2.1 is sealed and fixed to the valve body 1, and the fixing member 2.1 is provided with a movable hole coaxially penetrating and communicating with the airway, the inner side wall of the movable hole is provided with an inclined sealing surface 2.14, the sealing ring 2.3 is arranged at the lower end of the core rod 2.2 and is sealingly matched, the sealing ring 2.3 is movably arranged in the movable hole, and can be sealingly matched with the sealing surface 2.14, and an elastic pressing member for forcing the sealing ring 2.16 to fit tightly with the sealing surface 2.14 is also provided in the valve body 1. Among them, by cooperating with the core rod 2.2, the sealing ring 2.3 and the sealing surface 2.14, and reliably sealing the airway under the action of the elastic clamping piece, the sealing effect of the valve mouth is realized, and the inclined sealing surface 2.14 can ensure reliable contact with the sealing ring 2.3, that is, the sealing ring 2.3 can still have a reliable contact area with the sealing surface 2.14 and reliably seal under the action of the elastic clamping piece after long-term use and wear, and compensate for the worn sealing ring 2.3 to further increase the contact area, thereby improving the sealing effect and service life.

[0025] On the basis of the above, the movable hole includes a first air hole 2.11, a transition air channel 2.12 and a second air hole 2.13 which are arranged in sequence, and the inner wall of the transition air channel 2.12 is a sealing surface 2.14. The core rod 2.2 is provided with a support platform 2.21, and the sealing ring 2.3 is nested on the outside of the core rod 2.2 and located above the support platform 2.21. The support platform 2.21 and the core rod 2.2 can be fixed by welding or screwing. In addition, a limiting platform 2.22 located above the supporting platform 2.21 is provided on the core rod 2.2, and the sealing ring 2.3 is fixedly arranged between the supporting platform 2.21 and the limiting platform 2.22; the inner diameter of the sealing ring 2.3 is smaller than the outer diameter of the supporting platform 2.21, the outer diameter of the sealing ring 2.3 is larger than the outer diameter of the limiting platform 2.22, and the diameter of the limiting platform 2.22 is smaller than the aperture of the first air hole 2.11. The support platform 2.21 is provided to prevent the sealing ring 2.3 from slipping off the core rod 2.2. The cooperation between the stop platform 2.22 and the support platform 2.21 can ensure the stability of the sealing ring 2.3 and reduce the relative rotation between the sealing ring 2.3 and the core rod 2.2, and ensure the reliability of the cooperation between the sealing ring 2.3 and the sealing surface 2.14. The outer diameter of the sealing ring 2.3 is larger than the inner diameter of the stop platform 2.22, and the diameter of the stop platform 2.22 is smaller than the aperture of the first air hole 2.11, which can ensure that the sealing ring 2.3 has a portion in contact with the sealing surface 2.14, and avoid interference between the stop platform 2.22 and the sealing surface 2.14.

[0026] The fixing part 2.1 of the present design and the valve body 1 adopt an interference fit, and a sealing groove 2.15 is provided between the fixing part 2.1 and the valve body 1, and a sealing ring 2.16 is provided in the sealing groove 2.15. The interference fit of the fixing part 2.1 and the valve body 1 can ensure the reliability of the setting of the fixing part 2.1, and the cooperation of the sealing groove 2.15 and the sealing ring 2.16 can further ensure the sealing between the fixing part 2.1 and the valve body 1. Of course, the fixing part 2.1 and the valve body 1 can be connected by threads, or they can be integrally formed.

[0027] In order to ensure the reliability of the valve, the valve body 1 is provided with a constriction, and the upper end of the core rod 2.2 is provided with a sealing cap 2.23 that matches the constriction. The setting of the sealing cap 2.23 facilitates the pressing of the core rod 2.2 and drives the sealing ring 2.3 to separate from the sealing surface 2.14, which is convenient for inflation and deflation, and the cooperation between the sealing cap 2.23 and the constriction can prevent debris from entering the airway. It is worth mentioning that the elastic clamping member of this design is a spring 2.4, which is sleeved on the outside of the core rod 2.2, and the two ends of the spring 2.4 are respectively pressed against the sealing cap 2.23 and the fixing member 2.1. Further explanation: a fixing column 2.24 is provided between the sealing cap 2.23 and the core rod 2.2, and the fixing member 2.1 is provided with a limiting sleeve 2.17, and the two ends of the spring 2.4 are respectively sleeved on the outside of the fixing column 2.24 and the limiting sleeve 2.17. The provided spring 2.4 can reliably lift the core rod 2.2, thereby driving the sealing ring 2.3 to press the sealing cover 2.14 to ensure the sealing reliability of the valve mouth, while the provided fixing column 2.24 and the limiting sleeve 2.17 can ensure the stability of the spring 2.4 during the pressing process to avoid deviation and shaking.

[0028] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A high-sealability air valve, comprising an air valve body and a valve core assembly, wherein the air valve body is provided with an air passage passing therethrough, and the valve core assembly is used for movably sealing the air passage, characterized in that: The valve core assembly includes a fixing part, a core rod and a sealing ring. The fixing part is sealed and fixed to the valve body, and the fixing part is provided with a movable hole connected to the airway. The inner side wall of the movable hole is provided with an inclined sealing surface. The sealing ring is arranged at the lower end of the core rod and is sealed. The sealing ring is movably arranged in the movable hole and can be sealed with the sealing surface. An elastic pressing part is also provided in the valve body to force the sealing ring to fit tightly with the sealing surface.

2. A high sealing valve according to claim 1, characterized in that: The movable hole comprises a first air hole, a transition air channel and a second air hole which are arranged in sequence, and the inner side wall of the transition air channel is a sealing surface.

3. A high sealing valve according to claim 2, characterized in that: The core rod is provided with a support platform, and the sealing ring is nested outside the core rod and located above the support platform.

4. A high sealing valve according to claim 3, characterized in that: The core rod is provided with a limiting platform located above the supporting platform, and the sealing ring is arranged between the supporting platform and the limiting platform.

5. A high sealing valve according to claim 4, characterized in that: The inner diameter of the sealing ring is smaller than the outer diameter of the supporting platform, the outer diameter of the sealing ring is larger than the outer diameter of the limiting platform, and the diameter of the limiting platform is smaller than the aperture of the first air hole.

6. A high sealing valve according to claim 1, characterized in that: The fixing piece is interference fit with the valve body, a sealing groove is arranged between the fixing piece and the valve body, and a sealing ring is arranged in the sealing groove.

7. A high sealing valve according to claim 1, characterized in that: The valve body is provided with a constriction, and the upper end of the core rod is provided with a sealing cap matched with the constriction.

8. A high sealing valve according to claim 7, characterized in that: The elastic pressing member is a spring, which is sleeved on the outside of the core rod, and the two ends of the spring are respectively pressed against the sealing cap and the fixing member.

9. A high sealing valve according to claim 8, characterized in that: A fixing column is arranged between the sealing cap and the core rod, a limiting sleeve is arranged on the fixing piece, and two ends of the spring are respectively sleeved on the outside of the fixing column and the limiting sleeve.

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