Three-way connector for chemical oxygen fire-fighting self-rescue respirator

Abstract

The three-way connector comprises a three-way seat, a valve body, a one-way membrane and a first fixing piece, an opening in the top end of the three-way seat is detachably connected with a protective hood, the valve body is connected with an opening in the side end of the three-way seat and an air storage bag, the one-way membrane is movably arranged in the valve body, and the first fixing piece is connected with the valve body. An annular step part is arranged at the bottom of the three-way seat, the step part is elastic and is detachably connected with the oxygen generation tank, and the first fixing piece is detachably connected with the step part and is used for fixing the step part on the oxygen generation tank. According to the utility model, after the potassium superoxide particles in the oxygen generation tank are completely reacted, only the oxygen generation tank needs to be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a three-way connector for a chemical oxygen fire fighting self-rescue breathing apparatus. Background Art

[0002] The existing chemical oxygen fire-fighting self-rescue respirator allows the exhaled carbon dioxide gas to flow out from the protective hood directly into the oxygen tank to react with potassium superoxide particles to produce oxygen. Within a certain period of time, it can be continuously circulated for human breathing. Since the oxygen tank is directly connected to the protective hood and the air storage bag, when the potassium superoxide particles in the oxygen tank are consumed by the reaction, or the oxygen tank fails due to improper storage, the protective hood, oxygen tank and air storage bag cannot be used again and must be scrapped as a whole. This is a design deficiency that causes great waste. Utility Model Content

[0003] The utility model aims to solve the above technical problems and provides a three-way connector for a chemical oxygen fire fighting self-rescue breathing apparatus.

[0004] The technical solution of the utility model is as follows: a three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus comprises a three-way seat, a valve body, a one-way diaphragm and a first fixing piece, wherein the top opening of the three-way seat is detachably connected to a protective head cover, the valve body is connected to a side opening of the three-way seat and an air storage bag, the one-way diaphragm is movably arranged in the valve body, an annular step portion is provided at the bottom of the three-way seat, the step portion is elastic and is detachably connected to an oxygen generating tank, and the first fixing piece is detachably connected to the step portion for fixing the step portion on the oxygen generating tank.

[0005] Preferably, the step portion is provided with an external thread, and the first fixing member is a nut which is threadedly connected to the step portion.

[0006] Preferably, a first sealing ring is provided on the step portion.

[0007] Preferably, the valve body is detachably connected to the air storage bag; and further comprises a second fixing member detachably connected to the valve body for fixing the valve body to the air storage bag.

[0008] Preferably, the valve body is provided with an external thread, and the second fixing member is a nut which is threadedly connected to the valve body.

[0009] Preferably, a second sealing ring is provided on the valve body.

[0010] Preferably, a rubber plug is detachably provided on the top of the three-way seat.

[0011] The beneficial effect of the utility model is that in the utility model, when the potassium superoxide particles in the oxygen generating tank have finished reacting, it is only necessary to replace the oxygen generating tank, and the replacement is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a stereoscopic diagram of the overall structure of the preferred embodiment of the utility model;

[0013] Figure 2 It is a stereoscopic diagram of the overall structure of the preferred embodiment of the utility model, the protective head cover connector and the oxygen tank connection;

[0014] Figure 3 It is a cross-sectional view of the overall structure of the preferred embodiment of the utility model, the protective head cover connector and the oxygen tank connection;

[0015] Figure 4 yes Figure 3 A partial enlarged view of the middle part;

[0016] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0017] Reference numerals: three-way seat 10 , step portion 101 , rubber plug 102 , first sealing ring 1011 , valve body 2 , second sealing ring 201 , support plate 202 , one-way diaphragm 3 , sliding rod 301 , first fixing member 4 , second fixing member 5 . DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Reference Figures 1 to 5A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus comprises a three-way seat 10, a valve body 2 and a one-way diaphragm 3. The top opening of the three-way seat 10 is detachably connected to a protective head cover, the valve body 2 is connected to a side opening of the three-way seat 10 and an air storage bag, the one-way diaphragm 3 is movably arranged in the valve body 2, and an annular step portion 101 is provided at the bottom of the three-way seat 10. The step portion 101 is elastic and detachably connected to an oxygen generating tank; and also comprises a first fixing member 4, which is detachably connected to the step portion 101 and is used to fix the step portion 101 to the oxygen generating tank. In the utility model, a support plate 202 is provided in the valve body 2, and a plurality of through holes are provided on the support plate 202. A slide rod 301 is provided at one end of the one-way diaphragm 3, and an annular baffle is provided on the slide rod 301. The slide rod 301 is slidably connected with the slide rod 301. Mesh plates are provided above and below the inside of the oxygen tank, and potassium superoxide particles are between the two mesh plates. A sealing ring protruding outward is provided at the opening where the air storage bag is connected to the bottom of the oxygen tank. The oxygen tank is detachably connected to the sealing ring on the air storage bag through a metal buckle. When the self-rescue respirator is in use, the personnel wear a protective hood, and the exhaled carbon dioxide gas flows from the top opening of the three-way seat 10 into the oxygen tank through the bottom opening of the three-way seat 10 and flows into the potassium superoxide. The reaction produces oxygen, which flows into the air storage bag. When inhaling, the one-way diaphragm 3 moves to the left under the pressure, and the oxygen in the air storage bag flows from the valve body 2 into the three-way seat 10, and flows into the protective head cover through the top opening of the three-way seat 10. When the potassium superoxide particles in the oxygen tank need to be replaced after the reaction, remove the first fixing part 4, take out the step part 101 from the opening of the oxygen tank, and then remove the metal buckle to remove the oxygen tank from the air storage bag, and replace the new oxygen tank. The bottom of the new oxygen tank is connected to the sealing ring on the air storage bag through the metal buckle. Since the bottom of the step part 101 is elastic, the step part 101 extends into the oxygen tank, and the first fixing part 4 is installed to fix it. Specifically, the step part 101 is made of flame-retardant plastic; a connector is provided on the protective head cover, and the top of the three-way seat 10 is screwed to the connector.

[0020] As a preferred embodiment of the utility model, it may also have the following additional technical features:

[0021] In this embodiment, the step portion 101 is provided with an external thread, and the first fixing member 4 is a nut, which is screwed to the step portion 101. Specifically, the bottom of the step portion 101 is larger than the top opening of the oxygen generating tank. Since the step portion 101 is elastic, the bottom of the step portion 101 can be put into the oxygen generating tank. The first fixing member 4 is a nut screwed to the step portion 101. The bottom of the step portion 101 and the first fixing member 4 are matched to clamp the wall of the top of the oxygen generating tank, so that the three-way seat 10 is detachably connected to the oxygen generating tank.

[0022] In this embodiment, a first sealing ring 1011 is provided on the step portion 101 to improve the sealing performance of the connection between the three-way seat 10 and the oxygen generating tank.

[0023] In this embodiment, the valve body 2 is detachably connected to the air storage bag. A second fixing member 5 is also included, which is detachably connected to the valve body 2 and is used to fix the valve body 2 to the air storage bag.

[0024] In this embodiment, the valve body 2 is provided with an external thread, and the second fixing member 5 is a nut, which is screwed with the valve body 2. Specifically, a sealing ring is provided in the opening where the air storage bag is connected to the valve body 2. When the valve body 2 is installed on the air storage bag, the valve body 2 is inserted into the opening of the air storage bag, and the second fixing member 5 is held by hand and extended from the opening where the air storage bag is connected to the oxygen tank, and the second fixing member 5 is screwed with the valve body 2. The sealing ring is stuck between the second fixing member 5 and the valve body 2, and then the valve body 2 is fixedly connected with the air storage bag, and the oxygen tank is installed later.

[0025] In this embodiment, a second sealing ring 201 is provided on the valve body 2 to improve the sealing performance of the connection between the valve body 2 and the air storage bag.

[0026] In this embodiment, a rubber plug 102 is detachably provided on the top of the three-way seat 10. The rubber plug 102 is inserted into the top of the three-way seat 10 to seal the top of the three-way seat 10 to prevent the potassium superoxide in the oxygen generating tank from reacting with carbon dioxide in the air.

[0027] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus, characterized in that: The invention comprises a three-way seat (10), a valve body (2), a one-way diaphragm (3) and a first fixing member (4); the top opening of the three-way seat (10) is detachably connected to a protective head cover; the valve body (2) is connected to a side opening of the three-way seat (10) and an air storage bag; the one-way diaphragm (3) is movably arranged in the valve body (2); an annular step portion (101) is provided at the bottom of the three-way seat (10); the step portion (101) is elastic and detachably connected to an oxygen generating tank; the first fixing member (4) is detachably connected to the step portion (101) and is used to fix the step portion (101) on the oxygen generating tank.

2. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus according to claim 1, characterized in that: The step portion (101) is provided with an external thread, and the first fixing member (4) is a nut which is threadedly connected to the step portion (101).

3. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus according to claim 2, characterized in that: A first sealing ring (1011) is provided on the step portion (101).

4. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus according to claim 1, characterized in that: The valve body (2) is detachably connected to the air storage bag; and further comprises a second fixing member (5) detachably connected to the valve body (2) for fixing the valve body (2) to the air storage bag.

5. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus according to claim 4, characterized in that: The valve body (2) is provided with an external thread, and the second fixing member (5) is a nut which is threadedly connected to the valve body (2).

6. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus according to claim 5, characterized in that: The valve body (2) is provided with a second sealing ring (201).

7. A three-way connector for a chemical oxygen fire-fighting self-rescue breathing apparatus according to claim 1, characterized in that: The top of the three-way seat (10) is detachably provided with a rubber plug (102).

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