Inflation valve

Abstract

An inflation valve comprises a valve shell, an upper air chamber and a lower air chamber are arranged in the valve shell, the upper air chamber and the lower air chamber are communicated with each other through a valve port, an inflation one-way valve element assembly is arranged at the position of the valve port, and a plurality of air holes which are axially formed along the circumference at intervals are formed in the circumferential wall of the lower air chamber; the valve is characterized in that the valve further comprises a filter cover used for filtering impurities, the filter cover comprises a frame made of plastic and a filter screen with meshes, the frame is installed on the peripheral wall of the valve shell, and the filter screen is embedded in the peripheral wall and the bottom wall of the frame so that the air holes can be blocked by the filter screen. The inflation valve has the advantages that impurities are prevented from entering the lower air chamber through the arrangement of the filter cover, and meanwhile the ventilation capacity of the inflation valve is guaranteed; the filter cover of the inflation valve is provided with the frame, so that the periphery of the filter screen is protected by plastic, and the strength of the filter screen is enhanced; when the inflation valve encounters water, the filter screen can be supported by the frame, and the situation that the air permeability of the filter screen becomes poor due to water absorption is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valve appliances, in particular to an inflation valve. Background Art

[0002] Inflation valves are provided on relatively large equipment that needs to be inflated, such as inflatable beds and inflatable boats. A conventional inflation valve includes a housing, which has a working chamber communicating with the working environment and an air inlet chamber communicating with the outside. The working chamber and the air inlet chamber are interconnected through a valve port, and a one-way inflation valve core assembly is provided at the valve port. In order to prevent impurities from entering the inflation valve and affecting its use effect, in the existing inflation valve, as shown in the Chinese utility model "A Gas Valve" with the patent number CN201420711166.X (the authorized publication number is CN204358185U), an upper air chamber and a lower air chamber are provided in the valve housing. A wrapping with mesh holes is fixedly wrapped around the outer periphery of the lower air chamber, and the ventilation holes on the peripheral wall of the lower air chamber are blocked by the wrapping. The wrapping is a nylon mesh made of flexible material. The wrapping is pressed and fixed on the outer periphery of the lower air chamber through a plastic ring fixed on the outer periphery of the lower air chamber. Therefore, the ventilation holes on the peripheral wall of the lower air chamber and the mesh holes on the wrapping can not only ensure sufficient ventilation volume, but also play a role in blocking impurities.

[0003] Although the above inflation valve ensures the ventilation effect and blocks impurities through the nylon mesh, during the use of the inflation valve, it is prone to being bumped, which may cause the nylon mesh to have holes, allowing impurities to enter the inflation valve and thus affecting its use effect. Moreover, if there is water during the use of the inflation valve, after the nylon mesh absorbs water, it is likely to stick to the ventilation holes of the valve housing, resulting in poor air permeability, which affects the ventilation volume of the inflation valve during inflation or exhaust, and deteriorates the use effect of the inflation valve. In addition, the nylon mesh of the above inflation valve is pressed and fixed on the outer periphery of the lower air chamber through a plastic ring, and the operation of installing the nylon mesh is relatively troublesome, requiring the user to apply force to install the plastic ring on the outer periphery of the lower air chamber. Therefore, further improvement is needed for the inflation valve. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an inflation valve that can block the entry of impurities and has a more stable structure in view of the above-mentioned current situation of the prior art.

[0005] The technical solution adopted by the present utility model to solve the above technical problems is as follows: The inflation valve includes a valve housing. An upper air chamber and a lower air chamber are provided inside the valve housing. The upper air chamber and the lower air chamber are interconnected through a valve port. An inflation one-way valve core assembly is provided at the position of the valve port. A plurality of axially arranged and circumferentially spaced ventilation holes are provided on the peripheral wall of the lower air chamber. It is characterized in that: It further includes a filter cover for filtering impurities. The filter cover includes a frame made of plastic and a filter net with mesh holes. The frame is installed on the outer peripheral wall of the valve housing. The filter net is embedded on the peripheral wall and the bottom wall of the frame, so that the ventilation holes are blocked by the filter net.

[0006] In order to enable the filter net to be embedded on the peripheral wall and the bottom wall of the frame, preferably, the frame includes a first annular frame that can be installed on the outer peripheral wall of the valve housing and a second annular frame located below the first annular frame. Part of the filter net is embedded in the second annular frame. A plurality of vertically arranged and spaced vertical frames are provided between the first annular frame and the second annular frame. The remaining filter net is embedded between two adjacent vertical frames. The first annular frame is connected to the second annular frame through the vertical frames. The user installs the first annular frame on the outer peripheral wall of the valve housing, thereby sleeving the entire filter cover on the lower end of the valve housing, that is, blocking the ventilation holes. Moreover, the filter net is strengthened in strength through the first annular frame, the second annular frame and the vertical frames, so that the filter net is formed by encapsulation, avoiding damage to the filter net.

[0007] In order to enable the first annular frame to be installed on the outer peripheral wall of the valve housing, preferably, an annular rib is provided on the outer peripheral wall of the valve housing. The annular rib is located above the ventilation holes. An annular step and at least two ribs are provided on the inner wall of the first annular frame. An opening corresponding to the rib is provided on the annular rib. The rib is installed above the annular rib through the corresponding opening, so that the annular step and the rib can abut against the annular rib. Align each rib with its corresponding opening. The user pushes the filter cover upward, so that the rib is installed above the annular rib through the corresponding opening, and then rotates the filter cover to stagger each rib from its corresponding opening, so that the upper surface of the annular rib abuts against the rib, and the lower surface of the annular rib abuts against the annular step, that is, the annular step and the rib clamp the annular rib, thereby completing the installation of the first annular frame and the valve housing.

[0008] Furthermore, at least two limiting blocks are further provided on the inner wall of the first annular frame. The limiting blocks are provided with guide surfaces that are inclined outward from top to bottom. The limiting blocks are installed above the annular rib through the guide surfaces and abut against the annular rib. The limiting blocks are installed above the annular rib through the guide surfaces, so that the lower surface of the limiting blocks can abut against the annular rib.

[0009] To enhance the abrasion resistance of the filter screen, preferably, the filter screen is a metal filter screen or a plastic filter screen. Metal filter screens and plastic filter screens have a certain hardness, which not only enhances the abrasion resistance of the filter screen but also ensures that when encountering water, the filter screen will not be affected by water absorption and thus affect air permeability, thereby guaranteeing the ventilation effect of the filter screen.

[0010] To facilitate the assembly of the upper air chamber and the lower air chamber, preferably, the valve housing includes an outer shell and an inner shell. The inner shell is threadedly connected in the concave cavity of the outer shell. The upper air chamber is arranged on the inner shell, the lower air chamber is arranged in the concave cavity of the outer shell, and the valve port is arranged at the connection of the concave cavity of the inner shell and the outer shell. The upper air chamber and the lower air chamber are assembled in the valve housing through the cooperation of the outer shell and the inner shell.

[0011] Compared with the prior art, the advantages of the present utility model are as follows: The inflation valve prevents impurities from entering the lower air chamber through the ventilation holes by arranging the filter screen of the filter cover. At the same time, the filter screen of the filter cover has mesh holes, thus ensuring the ventilation volume of the inflation valve. And the filter cover of the inflation valve has a frame, so that the periphery of the filter screen is protected by plastic, that is, the filter screen is formed by encapsulating with rubber, avoiding damage to the filter screen when the inflation valve is knocked, thereby enhancing the strength of the filter screen. In addition, when the inflation valve encounters water, the frame can support the filter screen embedded therein, thus avoiding the deterioration of air permeability due to water absorption of the filter screen and ensuring sufficient ventilation volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 is a cross-sectional view of an embodiment of the present utility model;

[0014] Figure 3 is a schematic structural diagram of the frame in an embodiment of the present utility model;

[0015] Figure 4 is a schematic structural diagram of the outer shell in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below in conjunction with the embodiments of the drawings.

[0017] As Figures 1 to 4 shown, it is the best embodiment of the present utility model.

[0018] As Figure 1 and Figure 2As shown in the figure, the inflation valve of this embodiment includes a valve housing 1 and a filter cover 2 for filtering impurities. The valve housing 1 includes an outer housing 13 and an inner housing 14. The inner housing 14 is threadedly connected to the concave cavity of the outer housing 13. An upper air chamber A and a lower air chamber B are provided inside the valve housing 1. The upper air chamber A is provided on the inner housing 14, and the lower air chamber B is provided in the concave cavity of the outer housing 13. A plurality of axially arranged and circumferentially spaced air permeation holes 11 are provided on the peripheral wall of the lower air chamber B. The upper air chamber A and the lower air chamber B communicate with each other through a valve port C. The valve port C is provided at the connection of the inner housing 14 and the concave cavity of the outer housing 13, and an inflation one-way valve core assembly is provided at the position of the valve port C. Among them, the filter cover 2 includes a frame 21 made of plastic and a filter net 22 with mesh holes. The frame 21 is installed on the outer peripheral wall of the valve housing 1, and the filter net 22 is embedded in the peripheral wall and bottom wall of the frame 21, so that the air permeation holes 11 are blocked by the filter net 22, and the filter net 22 is a metal filter net or a plastic filter net. The filter net 22 is placed in the mold as an insert and then molded together with the frame 21.

[0019] As Figure 3 and Figure 4 shown in the figure, the frame 21 of this embodiment includes a first annular frame 211 that can be installed on the outer peripheral wall of the valve housing 1 and a second annular frame 212 located below the first annular frame 211. Part of the filter net 22 is embedded in the second annular frame 212. A plurality of vertically arranged and spaced vertical frames 213 are provided between the first annular frame 211 and the second annular frame 212, and the remaining filter net 22 is embedded between two adjacent vertical frames 213. And an annular rib 12 is provided on the outer peripheral wall of the valve housing 1 of this embodiment. The annular rib 12 is located above the air permeation holes 11. An annular step 211a and two ribs 211b are provided on the inner wall of the first annular frame 211. An opening 121 corresponding to the rib 211b is provided on the annular rib 12. The rib 211b is installed above the annular rib 12 through the corresponding opening 121, so that the annular step 211a and the rib 211b can abut against the annular rib 12. In addition, three limit blocks 211c are further provided on the inner wall of the first annular frame 211 of this embodiment. The limit blocks 211c are provided with a guiding surface that slopes outward from top to bottom. The limit blocks 211c are installed above the annular rib 12 through the guiding surface and abut against the annular rib 12.

[0020] The installation process of this embodiment is as follows: First, install the inflatable one-way valve core assembly into the inner shell 14, and then thread the inner shell 14 into the concave cavity of the outer shell 13; Then install the frame 21 of the filter cover 2 on the outer peripheral wall of the valve housing 1, that is, each rib 211b is aligned with its corresponding opening 121. The user pushes the filter cover 2 upward, so that the rib 211b is installed above the annular rib 12 through the corresponding opening 121, and each limiting block 211c is also installed above the annular rib 12 through the guiding surface and abuts against the annular rib 12. Finally, rotate the filter cover 2 so that each rib 211b is staggered from its corresponding opening 121, so that the upper surface of the annular rib 12 abuts against the rib 211b, and the lower surface of the annular rib 12 abuts against the annular step 211a, that is, the annular step 211a, the rib 211b and the limiting block 211c clamp the annular rib 12, thereby completing the installation of the filter cover 2 and the valve housing 1. This inflatable valve can be used for inflation or exhaust.

Claims

1. An inflation valve, comprising a valve housing (1), wherein the valve housing (1) has an upper air chamber (A) and a lower air chamber (B), wherein the upper air chamber (A) and the lower air chamber (B) are connected to each other via a valve port (C), wherein an inflation check valve core assembly is provided at the position of the valve port (C), and a peripheral wall of the lower air chamber (B) is provided with a plurality of axially arranged and circumferentially spaced air holes (11); characterized in that: The invention also comprises a filter cover (2) for filtering impurities, the filter cover (2) comprising a frame (21) made of plastic and a filter screen (22) having meshes, the frame (21) being mounted on the outer peripheral wall of the valve housing (1), the filter screen (22) being embedded in the peripheral wall and the bottom wall of the frame (21), so that the air vent (11) is blocked by the filter screen (22).

2. The inflation valve according to claim 1, characterized in that: The frame (21) comprises a first annular frame (211) which can be mounted on the outer peripheral wall of the valve housing (1) and a second annular frame (212) located below the first annular frame (211); part of the filter screen (22) is embedded in the second annular frame (212); a plurality of vertical frames (213) are arranged at intervals between the first annular frame (211) and the second annular frame (212); and the rest of the filter screen (22) is embedded between two adjacent vertical frames (213).

3. The inflation valve according to claim 2, characterized in that: An annular convex rib (12) is provided on the outer peripheral wall of the valve housing (1), and the annular convex rib (12) is located above the air vent (11); an annular step (211a) and at least two convex ribs (211b) are provided on the inner wall of the first annular frame (211); an opening (121) corresponding to the convex rib (211b) is provided on the annular convex rib (12); the convex rib (211b) is installed above the annular convex rib (12) through the corresponding opening (121), so that the annular step (211a) and the convex rib (211b) can abut against the annular convex rib (12).

4. The inflation valve according to claim 3, characterized in that: At least two limit blocks (211c) are also provided on the inner wall of the first annular frame (211), and the limit blocks (211c) are provided with guide surfaces inclined from top to bottom and outward, and the limit blocks (211c) are installed above the annular convex rib (12) through the guide surfaces and abut against the annular convex rib (12).

5. The inflation valve according to claim 1, characterized in that: The filter screen (22) is a metal filter screen or a plastic filter screen.

6. The inflation valve according to any one of claims 1 to 5, characterized in that: The valve housing (1) comprises an outer housing (13) and an inner housing (14); the inner housing (14) is threadedly connected to a concave cavity of the outer housing (13); the upper air chamber (A) is arranged on the inner housing (14); the lower air chamber (B) is arranged in the concave cavity of the outer housing (13); and the valve port (C) is arranged at a connection point between the concave cavities of the inner housing (14) and the outer housing (13).

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