Gas filtering device for gas detection

Abstract

The utility model relates to the field of gas filtering, and discloses a gas filtering device for gas detection, which comprises a gas detection box, a gas detector is fixedly mounted at the top of the inner wall of the gas detection box, and fixed brackets are symmetrically and fixedly connected to the inner wall of the gas detection box close to the lower part of the gas detector; a filter cartridge is mounted in the middle of the top end of the filter box, a filter assembly is arranged in the filter cartridge and used for filtering detected gas, a fixed inner cavity is formed in the top in the filter cartridge, a connecting plate is rotatably mounted in the fixed inner cavity, and an outer knob is mounted in the middle of the top end of the connecting plate and extends to the upper surface of the filter cartridge; by rotating the outer knob and utilizing a linkage structure of the connecting plate, the movable connecting rod and the limiting rod, the limiting state of the limiting rod in the limiting hole can be easily controlled, complex tools or tedious operations are not needed, the disassembly and assembly time is greatly saved, the maintenance efficiency is improved, and the labor intensity of operators is reduced.

Description

Technical Field

[0001] This application relates to the field of gas filtration, and more particularly to a gas filtration device for gas detection. Background Technology

[0002] During gas detection, the actual gas being tested often contains various impurities, such as dust, particulate matter, harmful chemicals, and microorganisms. If these impurities are not filtered, they can damage gas detection instruments, such as clogging sensors or corroding instrument components. At the same time, the presence of impurities can also interfere with the detection results, leading to inaccurate data that fails to accurately reflect the composition and properties of the gas.

[0003] A gas filtration device is a specialized instrument used to purify the gas being tested. It removes impurities from the gas using physical and chemical methods, providing a pure sample for gas detection. Currently, common gas filtration devices typically consist of a housing, filter elements, and other components, employing multiple filtration layers to filter different types of impurities in the gas. For example, fiber filter layers intercept particulate matter, while activated carbon filter layers adsorb harmful chemicals.

[0004] However, after a certain period of use, the multiple filter layers of existing gas filtration devices gradually become saturated or clogged due to the adsorption and interception of impurities, requiring periodic replacement or cleaning to maintain filtration efficiency. These filter devices are typically fixed inside gas detection chambers, where space is limited and the structure is complex. Disassembling and cleaning the filter layers often requires specific tools and tedious steps, potentially involving the removal of multiple fixed components and careful avoidance of other internal parts. This time-consuming and labor-intensive process not only increases the workload of operators but also reduces the efficiency of detection work, significantly increasing the difficulty of replacing filter layers.

[0005] In view of the aforementioned technologies, the inventors believe that the filter layer in the gas filtration device has the drawback of being inconvenient to disassemble and replace. Therefore, they have proposed a gas filtration device for gas detection to solve the above problems. Utility Model Content

[0006] To address the problem that filter layers in gas filtration devices are difficult to disassemble and replace, this application provides a gas filtration device for gas detection.

[0007] The gas filtration device for gas detection provided in this application adopts the following technical solution:

[0008] A gas filtration device for gas detection includes a gas detection chamber. A gas detector is fixedly installed on the top of the inner wall of the gas detection chamber. Fixed brackets are symmetrically fixed to the inner wall of the gas detection chamber near the lower part of the gas detector. A filter box is snapped into the fixed brackets. A filter cylinder is installed at the middle of the top of the filter box. A filter assembly is provided inside the filter cylinder for filtering the detection gas. A fixed inner cavity is opened at the top of the filter cylinder. A connecting plate is rotatably installed inside the fixed inner cavity. An external knob is installed at the middle of the top of the connecting plate extending to the upper surface of the filter cylinder. Several movable connecting rods are rotatably installed on the outer surface of the connecting plate. Several fixed holes are opened through one side of the inner wall of the fixed inner cavity. A limit rod is rotatably installed through one side of the movable connecting rod through the fixed holes. Several limit holes are opened through the top of the inner wall of the filter box. A reset mechanism is also provided inside the fixed holes for resetting and adjusting the limit rod.

[0009] Preferably, the filter assembly includes a plurality of mounting slots, which are arranged side by side at a certain interval on the outer surface of the filter cylinder. A mounting frame is installed inside the mounting slot. A filter layer is fixed to the middle of one side of the inner wall of the mounting frame. A first sealing gasket is fused to both the upper and lower ends of the mounting frame, and one end of the first sealing gasket abuts against the inner wall of the mounting slot.

[0010] Preferably, the reset mechanism includes a fixed baffle, which is fixedly installed at the middle of one side of the outer surface of the limiting rod. A reset spring is sleeved on the outer surface of the limiting rod near the fixed baffle, and one side of the reset spring abuts against the inner wall of the fixed hole.

[0011] Preferably, a second sealing gasket is welded to the bottom edge of the filter cylinder, and the bottom end of the second sealing gasket has several fixing grooves. Several limiting support rods are fixed to the bottom edge of the inner wall of the filter box, and the limiting support rods are located inside the fixing grooves. The fixing grooves and the limiting support rods are interlocked.

[0012] Preferably, the outer diameter of the limiting rod is smaller than the inner diameter of the limiting hole, one side of the limiting rod extends into the interior of the limiting hole, and the limiting rod and the limiting hole engage with each other.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. By rotating the external knob, the limiting rod's position within the limiting hole can be easily controlled through the linkage structure of the connecting plate, movable link, and limiting rod. When installing the filter cartridge, it can be quickly positioned on the filter box; during disassembly, rotating the external knob in the opposite direction causes the limiting rod to quickly disengage from the limiting hole under the action of the return spring. This eliminates the need for complex tools or cumbersome operations, significantly saving disassembly and assembly time, improving maintenance efficiency, and reducing the workload of operators.

[0015] 2. Multiple mounting slots are spaced at regular intervals on the outer surface of the filter cartridge. The mounting frame can be directly inserted into or removed from these slots to replace the filter layer. Furthermore, the No. 1 sealing gaskets at both ends of the mounting frame effectively ensure a tight seal after installation, preventing gas leakage. This design makes filter layer replacement simple and direct, eliminating the need for extensive disassembly of the entire device and further improving maintenance convenience.

[0016] 3. In addition to the sealing between the mounting frame and the mounting groove via a No. 1 sealing gasket, a No. 2 sealing gasket at the bottom edge of the filter cartridge engages with a limiting support rod at the bottom edge of the filter box's inner wall, further enhancing the overall sealing performance of the device. The limiting support rod at the bottom of the filter cartridge cooperates with the fixing groove at the bottom of the filter box's inner wall, providing stable support and positioning during installation. During gas filtration, this effectively prevents gas leakage from the connection points, ensuring that all gas entering the gas detector is fully filtered, thus improving the accuracy and reliability of gas detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the application embodiment;

[0018] Figure 2 This is a schematic diagram of the structure of the filter cartridge in the application embodiment;

[0019] Figure 3 This is a schematic diagram of the structure of the second sealing gasket in the embodiment of the application;

[0020] Figure 4 This is a schematic diagram of the internal structure of the fixed inner cavity in the embodiment of the application;

[0021] Explanation of reference numerals in the attached drawings: 1. Gas detection box; 2. Gas detector; 3. Fixed bracket; 4. Filter box; 5. Filter cylinder; 6. Mounting groove; 7. Mounting frame; 8. Filter layer; 9. No. 1 sealing gasket; 10. External knob; 11. Fixed inner cavity; 12. Connecting plate; 13. Movable connecting rod; 14. Fixing hole; 15. Limiting rod; 16. Fixed baffle; 17. Return spring; 18. Limiting hole; 19. No. 2 sealing gasket; 20. Fixing groove; 21. Limiting support rod. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] This application discloses a gas filtration device for gas detection. (Refer to...) Figure 1-4A gas filtration device for gas detection includes a gas detection chamber 1. A gas detector 2 is fixedly installed on the top of the inner wall of the gas detection chamber 1. Fixed brackets 3 are symmetrically fixed to the inner wall of the gas detection chamber 1 near the lower part of the gas detector 2. A filter chamber 4 is snapped into the fixed brackets 3. A filter cylinder 5 is installed at the top center of the filter chamber 4. A filter assembly is provided inside the filter cylinder 5 for filtering the detection gas. A fixed inner cavity 11 is opened at the top of the filter cylinder 5. A connecting plate 12 is rotatably installed inside the fixed inner cavity 11. The top center of the connecting plate 12 extends to the upper surface of the filter cylinder 5. An external knob 10 is installed on the surface of the connecting plate 12. Several movable connecting rods 13 are rotatably installed on the outer surface of the connecting plate 12. Several fixed holes 14 are opened through one side of the inner wall of the fixed cavity 11. A limit rod 15 is rotatably installed through one side of the movable connecting rod 13 through the fixed hole 14. Several limit holes 18 are opened through the top of the inner wall of the filter box 4. The outer diameter of the limit rod 15 is smaller than the inner diameter of the limit hole 18. One side of the limit rod 15 extends into the interior of the limit hole 18. The limit rod 15 and the limit hole 18 are engaged with each other. A reset mechanism is also provided inside the fixed hole 14 for resetting and adjusting the limit rod 15.

[0024] By inserting the filter cylinder 5 along the top opening of the filter box 4 and simultaneously rotating the outer knob 10, the outer knob 10 drives the connecting plate 12 to rotate. The connecting plate 12 drives the movable connecting rod 13 and the limiting rod 15 to rotate. Under the elastic force of the return spring 17, the limiting rod 15 rotates until it aligns with the limiting hole 18 and is engaged in the limiting hole 18, thus achieving the positioning and installation of the filter cylinder 5 on the filter box 4. When it is necessary to remove the filter cylinder 5, rotate the outer knob 10 in the opposite direction, and the limiting rod 15 will disengage from the limiting hole 18, allowing the filter cylinder 5 to be removed from the filter box 4.

[0025] Reference Figure 2 and Figure 3 The filter assembly includes several mounting slots 6, which are arranged side by side at a certain interval on the outer surface of the filter cylinder 5. A mounting frame 7 is installed inside the mounting slot 6. A filter layer 8 is fixed to the middle of one side of the inner wall of the mounting frame 7. A first sealing gasket 9 is fused to the upper and lower ends of the mounting frame 7. One end of the first sealing gasket 9 abuts against the inner wall of the mounting slot 6.

[0026] To replace the filter layer 8 inside the filter cartridge 5, the mounting frame 7 can be directly removed from the mounting slot 6 of the filter cartridge 5. Since the No. 1 sealing gasket 9 at both ends of the mounting frame 7 abuts against the inner wall of the mounting slot 6, a seal is ensured. After replacing the mounting frame 7 and the filter layer 8, simply reinsert them into the mounting slot 6.

[0027] Reference Figure 4 The reset mechanism includes a fixed baffle 16, which is fixedly installed at the middle of one side of the outer surface of the limiting rod 15. A reset spring 17 is sleeved on the side of the outer surface of the limiting rod 15 near the fixed baffle 16, and one side of the reset spring 17 abuts against the inner wall of the fixing hole 14.

[0028] Reference Figure 3 and Figure 4 The bottom edge of the filter cylinder 5 is welded with a No. 2 sealing gasket 19. The bottom end of the No. 2 sealing gasket 19 is provided with several fixing grooves 20. The bottom edge of the inner wall of the filter box 4 is fixed with several limiting support rods 21. The limiting support rods 21 are located inside the fixing grooves 20, and the fixing grooves 20 and the limiting support rods 21 are interlocked.

[0029] By aligning the limiting support rod 21 at the bottom of the filter cylinder 5 with the fixing groove 20 at the bottom of the inner wall of the filter box 4 and inserting it, after the filter cylinder 5 is placed at the bottom of the filter box 4, multiple limiting support rods 21 are inserted into the fixing groove 20, and the second sealing gasket 19 is pressed against the bottom surface of the inner wall of the filter box 4 to maintain the sealing effect between the filter box 4 and the filter cylinder 5.

[0030] The implementation principle of a gas filtration device for gas detection according to an embodiment of this application is as follows: During the gas detection process, the gas to be detected first enters the filter cylinder 5 and is filtered through the mounting frame 7 and filter layer 8 within the mounting groove 6 on the outer surface of the filter cylinder 5. Different types of filter layers 8 (such as fiber filter layers, activated carbon filter layers, etc.) can intercept and adsorb impurities such as dust, particulate matter, and harmful chemicals in the gas, removing impurities and purifying the gas. The filtered gas flows out from the filter cylinder 5 and enters the gas detector 2 for composition and property detection.

[0031] When the filter layer 8 needs to be replaced or cleaned after a certain period of use, the filter cartridge 5 can be quickly removed from the filter box 4 using the aforementioned convenient disassembly and assembly method. Then, the mounting frame 7 and filter layer 8 inside the filter cartridge 5 can be replaced or cleaned. After replacement or cleaning, the filter cartridge 5 is reinstalled onto the filter box 4 according to the installation steps to continue gas filtration. Throughout the process, the limiting rod 15 is controlled by the external knob 10 to maintain its position in the limiting hole 18, enabling convenient installation and removal of the filter cartridge 5 from the filter box 4. The filter layer 8 is replaced by inserting and removing the mounting frame 7 into the mounting slot 6, making the operation simple and convenient. Simultaneously, the first sealing gasket 9 and the second sealing gasket 19 ensure the sealing of the device during filtration. The cooperation between the limiting support rod 21 and the fixing slot 20, as well as the engagement between the limiting rod 15 and the limiting hole 18, ensure the structural stability of the device, guaranteeing stable and efficient operation of the gas filtration device and providing accurate and reliable pure gas samples for gas detection.

[0032] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0033] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0034] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0035] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gas filtering device for gas detection, comprising a gas detection box (1), wherein a gas detector (2) is fixedly installed on the top of the inner wall of the gas detection box (1), and fixed brackets (3) are symmetrically fixed to the inner wall of the gas detection box (1) near the lower part of the gas detector (2), and a filter box (4) is snapped into the inside of the fixed brackets (3), characterized in that: A filter cylinder (5) is installed at the top center of the filter box (4). A filter assembly is provided inside the filter cylinder (5) for filtering the detection gas. A fixed inner cavity (11) is opened at the top of the filter cylinder (5). A connecting plate (12) is rotatably installed inside the fixed inner cavity (11). An external knob (10) is installed at the top center of the connecting plate (12) extending to the upper surface of the filter cylinder (5). Several movable connecting rods (13) are rotatably installed on the outer surface of the connecting plate (12). Several fixed holes (14) are opened through one side of the inner wall of the fixed inner cavity (11). A limit rod (15) is rotatably installed through one side of the movable connecting rod (13) through the fixed hole (14). Several limit holes (18) are opened through the top of the inner wall of the filter box (4). A reset mechanism is also provided inside the fixed hole (14) for resetting and adjusting the limit rod (15).

2. The gas filtration device for gas detection according to claim 1, characterized in that: The filter assembly includes several mounting slots (6), which are arranged side by side at a certain interval on the outer surface of the filter cylinder (5). A mounting frame (7) is installed inside the mounting slot (6). A filter layer (8) is fixed to the middle of one side of the inner wall of the mounting frame (7). A first sealing gasket (9) is fused to the upper and lower edges of the mounting frame (7). One end of the first sealing gasket (9) abuts against the inner wall of the mounting slot (6).

3. The gas filtering device for gas detection according to claim 1, characterized in that: The reset mechanism includes a fixed baffle (16), which is fixedly installed at the middle of one side of the outer surface of the limiting rod (15). A reset spring (17) is sleeved on the side of the outer surface of the limiting rod (15) near the fixed baffle (16), and one side of the reset spring (17) abuts against the inner wall of the fixing hole (14).

4. A gas filtering device for gas detection according to claim 1, characterized in that: The bottom edge of the filter cylinder (5) is welded with a No. 2 sealing gasket (19), and the bottom end of the No. 2 sealing gasket (19) is provided with several fixing grooves (20). The bottom edge of the inner wall of the filter box (4) is fixed with several limiting support rods (21), and the limiting support rods (21) are located inside the fixing grooves (20). The fixing grooves (20) and the limiting support rods (21) are interlocked.

5. A gas filtration device for gas detection according to claim 1, characterized in that: The outer diameter of the limiting rod (15) is smaller than the inner diameter of the limiting hole (18), and one side of the limiting rod (15) extends into the interior of the limiting hole (18). The limiting rod (15) and the limiting hole (18) engage with each other.

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