Impurity-preventing cylinder valve structure

Abstract

An impurity-preventing cylinder valve structure comprises a cylinder body and a cylinder valve and further comprises a protection pipe, a cylinder opening is formed in the lower portion of the cylinder body, the cylinder valve is installed on the lower side of the cylinder opening, the cylinder valve comprises a valve cavity, an air inlet hole channel and an air outlet hole channel, and the air inlet hole channel and the air outlet hole channel are communicated with the valve cavity. The protection pipe is vertically arranged, the upper end of the protection pipe extends to the position above the bottle opening, and the lower end of the protection pipe penetrates through the bottle opening and is connected with the air inlet hole channel. According to the scheme, the vertical protection pipe is additionally arranged, the upper end of the protection pipe extends to the position above the bottle opening, and the lower end of the protection pipe penetrates through the bottle opening and is connected with the air inlet hole channel, so that on one hand, it is ensured that the air inlet hole channel of the bottle valve can still communicate with the interior of the bottle body through the protection pipe, and the normal air supply function is achieved; on the other hand, due to the fact that the upper end of the protection pipe is located above the bottle opening, liquid and impurities in the bottle body can only be collected at the bottle opening and cannot enter the air inlet hole channel from the upper end of the protection pipe, and the problem that the bottle valve is affected is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle valve structures, and particularly relates to an impurity-proof bottle valve structure. Background Art

[0002] A positive pressure air respirator is a self-contained open-type air respirator, which is mainly applicable to fire fighting, chemical industry, ships, petroleum, smelting, factories, mines, laboratories, etc., enabling firefighters or rescue and relief personnel to carry out fire fighting, rescue and relief, and rescue work safely in harsh environments filled with thick smoke, poisonous gas, steam or lack of oxygen. The principle of the positive pressure air respirator is that air is stored in the gas cylinder in a high-pressure compressed manner. When in use, the high-pressure air in the gas cylinder undergoes multi-stage decompression through the bottle valve. After the output air pressure decreases, it is sent to the supply valve, and after being decompressed again by the supply valve, positive pressure air is provided to the user through the full face mask to ensure sufficient breathable air for the user.

[0003] However, the compressed air contains various impurities, and due to the high pressure in the gas cylinder, the compressed air may liquefy and form droplets on the inner wall of the gas cylinder. Since the bottle valves of most gas cylinders are installed at the lower part of the gas cylinder, the liquid and impurities in the gas cylinder may drop due to gravity and enter the interior of the bottle valve, affecting the normal opening and closing of the bottle valve. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the problem in the prior art that the liquid and impurities in the gas cylinder may drop due to gravity and enter the interior of the bottle valve, affecting the normal opening and closing of the bottle valve.

[0005] To solve the above problems, the utility model provides an impurity-proof bottle valve structure, which includes a bottle body and a bottle valve, and further includes a protective tube. The lower part of the bottle body is provided with a bottle mouth, the bottle valve is installed on the lower side of the bottle mouth, the bottle valve includes a valve cavity and an air inlet passage and an air outlet passage respectively communicating with the valve cavity. The air inlet passage is upward and faces the bottle mouth. The protective tube is arranged vertically, and the upper end of the protective tube extends above the bottle mouth. The lower end of the protective tube passes through the bottle mouth and is connected to the air inlet passage.

[0006] Compared with the prior art, by adding a vertically arranged protective tube in the above solution, the upper end of the protective tube extends above the bottle mouth, and the lower end of the protective tube passes through the bottle mouth and is connected to the air inlet passage. Thus, on the one hand, it ensures that the air inlet passage of the bottle valve can still communicate with the interior of the bottle body through the protective tube to realize the normal air supply function. On the other hand, since the upper end of the protective tube is located above the bottle mouth, the liquid and impurities in the bottle body can only gather at the bottle mouth and cannot enter the air inlet passage from the upper end of the protective tube, effectively avoiding the problem that the bottle valve is affected.

[0007] In an improved solution, a circumferential annular protrusion is provided on the outer peripheral wall of the lower end of the protective tube, and a receiving portion for connecting the annular protrusion is provided on the upper portion of the air inlet passage. Thus, the lower end of the protective tube is more firmly connected to the air inlet passage through the annular protrusion, and the sealing performance is better.

[0008] In an improved solution, the annular protrusion is provided with an external thread, and the receiving portion is provided with an internal thread. The annular protrusion is screwed to the receiving portion, and the assembly is simple and convenient.

[0009] In an improved solution, the aperture of the inner hole of the protective tube is smaller than the aperture of the air inlet passage. Thus, the probability of liquid or impurities in the bottle body entering the air inlet passage is further reduced. Moreover, since the aperture of the inner hole of the protective tube is smaller than the aperture of the air inlet passage, the gas will be able to decompress to a certain extent when entering the air inlet passage from the inner hole of the protective tube, reducing the gas impact on the inside of the bottle valve.

[0010] In an improved solution, the protective tube is made of a metal material, which has high reliability and good durability.

[0011] In an improved solution, a valve core that can be adjusted to move vertically is provided in the valve cavity of the bottle valve, and a plug for controlling the opening and closing of the air inlet passage is provided at the upper end of the valve core. Description of the Drawings

[0012] Figure 1 is a front view schematic diagram of an anti-impurity bottle valve structure;

[0013] Figure 2 is along Figure 1 the sectional view schematic diagram taken along the A-A section line in

[0014] Figure 3 is Figure 2 the partial enlarged schematic diagram of the B area in

[0015] Description of the Reference Numerals:

[0016] 1. Bottle body; 11. Bottle mouth; 2. Bottle valve; 21. Valve cavity; 22. Air inlet passage; 221. Receiving portion; 23. Air outlet passage; 24. Valve core; 241. Plug; 3. Protective tube; 31. Annular protrusion. Detailed Embodiments

[0017] Those skilled in the art should understand that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0018] In the description of the following embodiments, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0019] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0020] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Please refer to Figures 1-3 , an anti-impurity bottle valve structure provided by an embodiment of the present utility model includes a bottle body 1 and a bottle valve 2, and further includes a protection tube 3. The lower part of the bottle body 1 is provided with a bottle mouth 11, the bottle valve 2 is installed on the lower side of the bottle mouth 11. The bottle valve 2 includes a valve cavity 21 and an air inlet channel 22 and an air outlet channel 23 respectively communicating with the valve cavity 21. The air inlet channel 22 is upward and faces the bottle mouth 11. The protection tube 3 is arranged vertically and the upper end of the protection tube 3 extends above the bottle mouth 11. The lower end of the protection tube 3 passes through the bottle mouth 11 and is connected to the air inlet channel 22.

[0022] Through the above solution, by adding a vertically arranged protection tube 3, the upper end of the protection tube 3 extends above the bottle mouth 11, and the lower end of the protection tube 3 passes through the bottle mouth 11 and is connected to the air inlet channel 22. On the one hand, it is ensured that the air inlet channel 22 of the bottle valve 2 can still be connected to the inside of the bottle body 1 through the protection tube 3 to realize the normal air supply function. On the other hand, since the upper end of the protection tube 3 is located above the bottle mouth 11, the liquid and impurities in the bottle body 1 can only gather at the bottle mouth 11 and cannot enter the air inlet channel 22 from the upper end of the protection tube 3, effectively avoiding the problem that the bottle valve 2 is affected.

[0023] As an improvement to this embodiment, a circumferential annular protrusion 31 is provided on the outer peripheral wall of the lower end of the protection tube 3, and a receiving portion 221 for connecting the annular protrusion 31 is provided on the upper part of the air inlet channel 22. Thus, the lower end of the protection tube 3 is more firmly connected to the air inlet channel 22 through the annular protrusion 31 and has better sealing performance.

[0024] More specifically, in this embodiment, the annular protrusion 31 is provided with an external thread, and the receiving portion 221 is provided with an internal thread. The annular protrusion 31 is screwed to the receiving portion 221, and the assembly is simple and convenient. Of course, in other embodiments, the annular protrusion 31 can also be connected to the receiving portion 221 in other forms such as interference insertion and welding, and this design does not limit this.

[0025] In this embodiment, the aperture of the inner hole of the protective tube 3 is smaller than the aperture of the air inlet passage 22, so as to further reduce the probability of the liquid or impurities in the bottle body 1 entering the air inlet passage 22. And the aperture of the inner hole of the protective tube 3 is smaller than the aperture of the air inlet passage 22. When the gas enters the air inlet passage 22 from the inner hole of the protective tube 3, it will be able to decompress to a certain extent and reduce the gas impact on the inside of the bottle valve 2.

[0026] The protective tube 3 is preferably made of a metal material such as stainless steel, etc., with high reliability and good durability.

[0027] A valve core 24 that can move vertically and adjustably is provided in the valve cavity 21 of the bottle valve 2. A plug 241 for controlling the on-off of the air inlet passage 22 is provided at the upper end of the valve core 24, so as to realize the on-off control of the air inlet section by the plug 241 through the vertical movement of the valve core 24. The movement and adjustment of the valve core 24 relative to the valve cavity 21 of the bottle valve 2 belong to the prior art, and this design does not limit this.

[0028] It should be noted that in the description of this application, the terms "inner", "outer", etc. indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for convenience of description, rather than indicating or implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to this application; all directional indications (such as up, down, left, right, front, back, inner, outer) are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If this specific posture changes, then the directional indication also changes accordingly.

[0029] In the description of this application, the description referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific example", or "some examples" means that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not have to be directed to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0030] As described above, it is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An anti-impurity bottle valve structure, comprising a bottle body (1) and a bottle valve (2), characterized in that, It further includes a protective tube (3). The lower part of the bottle body (1) is provided with a bottle mouth (11). The bottle valve (2) is installed on the lower side of the bottle mouth (11). The bottle valve (2) includes a valve cavity (21), an air inlet passage (22) and an air outlet passage (23) which are respectively communicated with the valve cavity (21). The air inlet passage (22) is arranged upward and towards the bottle mouth (11). The protective tube (3) is arranged vertically, and the upper end of the protective tube (3) extends above the bottle mouth (11). The lower end of the protective tube (3) passes through the bottle mouth (11) and is connected to the air inlet passage (22).

2. The anti-impurity bottle valve structure according to claim 1, characterized in that, The outer peripheral wall of the lower end of the protective tube (3) is provided with a circumferential annular protrusion (31). The upper part of the air inlet passage (22) is provided with a receiving part (221) for connecting the annular protrusion (31).

3. The anti-impurity bottle valve structure according to claim 2, characterized in that, The annular protrusion (31) is provided with an external thread, and the receiving part (221) is provided with an internal thread. The annular protrusion (31) is screwed to the receiving part (221).

4. The anti-impurity bottle valve structure according to claim 1, characterized in that, The aperture of the inner hole of the protective tube (3) is smaller than the aperture of the air inlet passage (22).

5. The anti-impurity bottle valve structure according to any one of claims 1-4, characterized in that, The protective tube (3) is made of metal material.

6. The anti-impurity bottle valve structure according to claim 1, characterized in that, A valve core (24) that can move and adjust vertically is arranged in the valve cavity (21) of the bottle valve (2). A plug (241) for controlling the on-off of the air inlet passage (22) is arranged at the upper end of the valve core (24).

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