Filtering device for gas detection

Abstract

The utility model relates to the field of gas detector accessories, and discloses a filtering device for gas detection, which comprises a gas detector body and a gas inlet pipe fixed on the surface of the gas detector body, the mounting groove is formed in the middle of the air inlet pipe; the positioning rod is fixed on one side of the outer wall of the air inlet pipe; the mounting sleeve is movably mounted in the mounting groove; the movable shaft is fixed at the position of the mounting sleeve corresponding to the positioning rod; a waterproof breathable film; and adsorption cotton. The waterproof breathable film is mounted in the mounting sleeve to filter impurities in gas, the adsorption cotton is mounted above the waterproof breathable film to absorb water and oil filtered by the waterproof breathable film, blockage of breathable holes of the waterproof breathable film is delayed, when the waterproof breathable film is cleaned, the mounting sleeve can be screwed out from the interior of the mounting groove, and the waterproof breathable film is cleaned. Therefore, the waterproof breathable film in the mounting sleeve can be cleaned or replaced conveniently, the disassembly and assembly operation of the waterproof breathable film is simplified, and the gas detection precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detector accessories, in particular to a filtering device used for gas detection. Background Art

[0002] A gas detector is an instrument tool for detecting gas leakage concentration. It mainly uses gas sensors to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases. In order to prevent a large amount of particles or moisture from entering the instrument when the detector inhales gas and causing damage to the instrument, a filter device is usually installed at the air inlet of the instrument to filter the inhaled gas.

[0003] However, most gas detectors on the market currently assemble filter cotton or filter mesh directly with the air inlet when setting the filter device, and the air inlet is generally fixed to the gas detector. When the filter cotton or filter mesh inside the air inlet is clogged with dust, the gas detector has difficulty in inhaling gas, and because the filter mesh is installed inside the air inlet, it is difficult to remove the filter mesh for cleaning or replacement, and the clogged filter mesh can easily affect the accuracy of gas detection. Summary of the invention

[0004] In view of the deficiencies of the prior art, the utility model provides a filtering device for gas detection, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model discloses a filtering device for gas detection, comprising a gas detector body,

[0007] The air inlet pipe is fixed on the surface of the gas detector body and is located directly above the air inlet of the gas detector body;

[0008] The mounting groove is provided in the middle of the air intake pipe;

[0009] A positioning rod, fixed on one side of the outer wall of the air intake pipe;

[0010] An installation sleeve, movably installed inside the installation slot;

[0011] The movable shaft is fixed at the position of the mounting sleeve corresponding to the positioning rod;

[0012] A waterproof and breathable membrane is installed inside the installation sleeve;

[0013] The adsorption cotton is installed on the surface of the waterproof breathable membrane on one side away from the gas detector body.

[0014] Furthermore, a sealing sleeve 1 is installed on the side of the waterproof and breathable membrane away from the adsorption cotton.

[0015] Furthermore, a sealing sleeve 2 is installed on the side of the adsorption cotton away from the waterproof breathable membrane.

[0016] Furthermore, a pressure plate is installed on the side of the sealing sleeve 2 away from the adsorption cotton.

[0017] Furthermore, a filter plate is fixed to a surface of one side of the air inlet pipe away from the gas detector body.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The utility model provides an installation groove in the middle of an air inlet pipe, an installation sleeve is movably installed inside the installation groove, a waterproof breathable membrane is installed inside the installation sleeve to filter impurities in the gas, and adsorption cotton is installed above the waterproof breathable membrane to absorb water and oil filtered by the waterproof breathable membrane, delaying the clogging of the air holes of the waterproof breathable membrane; when cleaning the waterproof breathable membrane, the installation sleeve can be screwed out from the installation groove, thereby facilitating the cleaning or replacement of the waterproof breathable membrane inside the installation sleeve, simplifying the disassembly and assembly operation of the waterproof breathable membrane, and being conducive to ensuring the accuracy of gas detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional assembly diagram of the utility model;

[0021] Figure 2 It is a three-dimensional structural diagram of the utility model;

[0022] Figure 3 This is a disassembled structural diagram of the installation sleeve in the utility model;

[0023] The numbers in the figure represent: 1. Gas detector body; 2. Air inlet pipe; 3. Installation groove; 4. Positioning rod; 5. Installation sleeve; 6. Movable shaft; 7. Sealing sleeve 1; 8. Waterproof breathable membrane; 9. Adsorption cotton; 10. Sealing sleeve 2; 11. Pressure plate; 12. Filter plate. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-3, including a gas detector body 1, an air inlet pipe 2, which is fixed on the surface of the gas detector body 1 and is located directly above the air inlet of the gas detector body 1; a mounting groove 3, which is opened in the middle of the air inlet pipe 2, and the mounting groove 3 is an irregular ellipse as a whole, and the middle section of the air inlet pipe 2 is not completely cut off, and a supporting plate connected and fixed to each other is reserved on one side of the air inlet pipe 2; a positioning rod 4, which is fixed on one side of the outer wall of the air inlet pipe 2; a mounting sleeve 5, which is movably installed in the mounting groove 3, and the inner wall of the mounting sleeve 5 is fixed with an annular supporting plate, and the outer wall is located on the side of the opening of the air inlet pipe 2. Protective plate, when the installation sleeve 5 is installed inside the installation groove 3, the gap between the air intake pipe 2 and the installation sleeve 5 is blocked by the support plate reserved on the side wall of the air intake pipe 2 and the protective plate of the installation sleeve 5, thereby reducing the possibility of unfiltered gas entering the interior of the gas detector body 1 from the gap between the air intake pipe 2 and the installation sleeve 5. A fixing block is fixed to the end of the protective plate away from the positioning rod 4, and a buckle is installed on the side of the fixing block close to the outer wall of the air intake pipe 2. A slot is set on the outer wall of the air intake pipe 2 at a position corresponding to the buckle, and the installation sleeve 5 is fixed in the installation groove 3 through the connection between the buckle and the slot; The movable shaft 6 is fixed at the position of the installation sleeve 5 corresponding to the positioning rod 4, and is installed with the positioning rod 4 through the movable shaft 6 so that the installation sleeve 5 can rotate through the movable shaft 6; the waterproof breathable membrane 8 is installed inside the installation sleeve 5, which can filter impurities such as water, oil and dust particles in the air to prevent impurities from entering the gas detector body 1 and damaging the electrical components; the adsorption cotton 9 is installed on the side surface of the waterproof breathable membrane 8 away from the gas detector body 1. When the waterproof breathable membrane 8 filters impurities such as water and oil in the air, the water and oil stay in the waterproof breathable membrane for a long time. The surface of the air membrane 8 is easy to invade the vent holes of the waterproof breathable membrane 8, causing the waterproof breathable membrane 8 to be blocked. The water and oil molecules on the surface of the waterproof breathable membrane 8 can be absorbed by the adsorbent cotton 9, reducing the risk of clogging of the waterproof breathable membrane 8 and ensuring that the waterproof breathable membrane 8 can normally inhale gas. When the waterproof breathable membrane 8 and the adsorbent cotton 9 are blocked, the waterproof breathable membrane 8 and the adsorbent cotton 9 installed in the installation sleeve 5 can be cleaned or replaced by rotating the installation sleeve 5 out of the installation groove 3, simplifying the disassembly and assembly operation of the waterproof breathable membrane 8, and at the same time, it is beneficial to keep the air inlet unobstructed. A sealing sleeve 7 is installed on the side of the waterproof breathable membrane 8 away from the adsorbent cotton 9, and the sealing sleeve 7 is located on the annular support plate on the inner wall of the installation sleeve 5. A positioning column is fixed on the surface of one side of the sealing sleeve 7. The surface of the waterproof breathable membrane 8 and the adsorbent cotton 9 has a positioning hole corresponding to the position of the positioning column. When installing, the waterproof breathable membrane 8 and the adsorbent cotton 9 are aligned with the positioning column for installation, which is beneficial to the fixing of the position of the waterproof breathable membrane 8 and the adsorbent cotton 9. A sealing sleeve 2 10 is installed on the side of the adsorption cotton 9 away from the waterproof breathable membrane 8. The sealing sleeve 2 10 and the sealing sleeve 1 7 are used to perform bidirectional sealing on the inside of the installation sleeve 5, which can reduce the possibility of gas entering the inside of the gas detector body 1 from the outer circle of the waterproof breathable membrane 8.A pressure plate 11 is installed on the side of the sealing sleeve 10 away from the adsorbent cotton 9, and the bottom of the pressure plate 11 is pressed on the surface of the sealing sleeve 10. The connecting plate fixed on the top of the pressure plate 11 is located on the upper surface of the mounting sleeve 5. Through the pressing of the pressure plate 11, the sealing sleeve 10, the adsorbent cotton 9, the waterproof breathable membrane 8 and the sealing sleeve 7 are restricted between the annular support plate and the pressure plate 11 of the mounting sleeve 5. When the mounting sleeve 5 is rotated into the mounting groove 3, the top of the pressure plate 11 is restricted by the air inlet pipe 2 above the mounting groove 3, so that the waterproof breathable membrane 8 is completely fixed inside the mounting sleeve 5, preventing the waterproof breathable membrane 8 or the adsorbent cotton 9 from moving with the airflow when the gas detector body 1 is inhaling.

[0026] A filter plate 12 is fixed to the surface of the side of the air inlet pipe 2 away from the gas detector body 1. The filter plate 12 can roughly filter the gas entering the air inlet pipe 2 to prevent coarse substances from damaging the waterproof breathable membrane 8.

[0027] Working principle: when assembling the installation sleeve 5, first assemble the sealing sleeve 1 7, waterproof breathable membrane 8, adsorbent cotton 9 and sealing sleeve 2 10 in order, then put the assembled parts into the annular support plate inside the installation sleeve 5, and then press the pressing plate 11 on the surface of the sealing sleeve 2 10. When the pressing plate 11 and the installation sleeve 5 are installed, rotate the installation sleeve 5 toward the air inlet pipe 2 through the movable shaft 6 to push the installation sleeve 5 into the installation groove 3. After the installation sleeve 5 is located in the installation groove 3, the buckle provided on the outer wall of the installation sleeve 5 is snap-connected with the slot provided on the outer wall of the air inlet pipe 2 to fix the installation sleeve 5. When gas detection is performed in the gas detector body 1, air enters the air inlet of the gas detector body 1 from the top of the air inlet pipe 2, and the gas enters the air inlet. When filtering the gas, it needs to pass through the filter plate 12 and the waterproof breathable membrane 8 to block the impurities in the gas outside the air inlet. When the waterproof breathable membrane 8 filters the gas, impurities such as water, oil, and dust contained in the gas are intercepted on the surface of the waterproof breathable membrane 8 to avoid damage to the inside of the gas detector body 1 by impurities, thereby extending the service life of the gas detector body 1. The water, oil, etc. filtered by the waterproof breathable membrane 8 are absorbed by the adsorption cotton 9, thereby delaying the clogging of the waterproof breathable membrane 8. When it is necessary to clean or replace the waterproof breathable membrane 8 or the adsorption cotton 9, the buckle of the installation sleeve 5 and the air inlet pipe 2 is opened, and the installation sleeve 5 is rotated to the side of the air inlet pipe 2 through the movable shaft 6, so as to facilitate the replacement or cleaning of the waterproof breathable membrane 8 or the adsorption cotton 9 in the installation sleeve 5.

[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 filtering device for gas detection, comprising a gas detector body (1), It is characterized in that Also included are: An air inlet pipe (2) is fixed on the surface of the gas detector body (1) and is located directly above the air inlet of the gas detector body (1); A mounting groove (3) is provided in the middle of the air intake pipe (2); A positioning rod (4) fixed to one side of the outer wall of the air intake pipe (2); A mounting sleeve (5) movably mounted inside the mounting groove (3); The movable shaft (6) is fixed at a position of the mounting sleeve (5) corresponding to the positioning rod (4); A waterproof and breathable membrane (8) is installed inside the installation sleeve (5); The adsorption cotton (9) is mounted on a surface of the waterproof and breathable membrane (8) on a side away from the gas detector body (1).

2. A filtering device for gas detection according to claim 1, characterized in that: A sealing sleeve 1 (7) is installed on the side of the waterproof breathable membrane (8) away from the adsorption cotton (9).

3. A filter device for gas detection according to claim 1, characterized in that: A sealing sleeve 2 (10) is installed on the side of the adsorption cotton (9) away from the waterproof breathable membrane (8).

4. A filtering device for gas detection according to claim 1, characterized in that: A pressure plate (11) is installed on the side of the second sealing sleeve (10) away from the adsorption cotton (9).

5. A filtering device for gas detection according to claim 1, characterized in that: A filter plate (12) is fixed to a surface of a side of the air inlet pipe (2) away from the gas detector body (1).

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