Extraction type gas detection device

Abstract

The utility model discloses an extraction type gas detection device, which belongs to the technical field of environment detection and comprises a device main body, the air inlet structure comprises a telescopic corrugated pipe, mounting rings, screw rods, a rotary drum and a mounting plate, the telescopic corrugated pipe is provided with an air inlet, an air outlet and an air cavity, one mounting ring is mounted at the air inlet, the other mounting ring is mounted at the air outlet, and the screw rods are fixedly mounted on the lower end face of one mounting ring and the upper end face of the other mounting ring; according to the utility model, through the arrangement of the air inlet structure, a worker rotates the rotary drum, so that the sliding block slides in the sliding groove, and further the telescopic corrugated pipe fixedly connected with the mounting ring is driven to stretch or contract along the axial direction of the screw rod; the telescopic corrugated pipe is short, so that the gas flow rate is high; the telescopic corrugated pipe is long, the gas flow rate is low, operation is easy, workers can change the gas flow rate conveniently according to actual requirements, and the equipment application range is widened.

Description

Technical Field

[0001] This utility model belongs to the field of environmental monitoring technology, specifically relating to an extraction-type gas detection device. Background Technology

[0002] A gas detection device is a device used to detect the composition and concentration of specific gases in the environment. Such devices are very important in many fields, including industrial safety, environmental monitoring, medical health, and mining safety. Their main function is to detect potential hazardous gases in a timely manner and prevent safety accidents such as poisoning and explosions.

[0003] Based on different detection principles and application scenarios, gas detection devices can be divided into solid-state gas detection devices and extraction-type gas detection devices. Simply put, extraction-type gas detection devices use pumps or fans to draw gas samples into the detection chamber, and then use various detection technologies (such as catalytic combustion, electrochemistry, infrared absorption, etc.) for analysis. Since extraction-type gas detection devices are usually portable and can be moved to different locations for detection, they are suitable for scenarios that require remote or fixed-point sampling and detection, such as industrial pipelines, environmental monitoring, and mines.

[0004] In practical use, the gas flow rate affects the contact time between the sensor and the gas, thus affecting the sensor's response speed and detection accuracy. If the flow rate is too fast, the gas may not have enough time to react with the sensor, resulting in a low reading. If the flow rate is too slow, it may prolong the detection time and affect efficiency. Existing extraction-type gas detection devices do not integrate flow rate control functions, resulting in ineffective flow rate control. Therefore, an extraction-type gas detection device is needed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an extraction-type gas detection device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an extraction-type gas detection device, comprising:

[0007] Main body of the device;

[0008] An air intake structure includes a telescopic bellows, mounting rings, a screw, a rotating drum, and a mounting plate. The telescopic bellows has an air inlet, an air outlet, and an air chamber. A pair of mounting rings are provided, with one mounting ring mounted on the end of the telescopic bellows forming the air inlet and the other mounting ring mounted on the end of the telescopic bellows forming the air outlet. One end of the screw is fixedly mounted on the lower end face of one of the mounting rings, and one end of the rotating drum is fixedly mounted on the upper end face of the other mounting ring. The screw and the rotating drum are threadedly connected. One mounting ring is slidably mounted on the mounting plate, and the other mounting ring is fixed to the mounting plate. The end of the telescopic bellows forming the air outlet is connected to the main body of the device.

[0009] As a preferred embodiment, the air intake structure further includes multiple telescopic columns, each with its two ends connected to the lower end face of one of the mounting rings and the upper end face of another mounting ring, and the multiple telescopic columns and the screw are distributed circumferentially around the center of the mounting ring.

[0010] As a preferred embodiment, the mounting plate has a groove, the mounting ring has a slider, and a pair of sliders on the mounting ring are formed on one side, the sliders being slidably positioned in the groove.

[0011] As a preferred embodiment, the intake structure further includes a disassembly plate and a fixing stud, wherein one of the mounting rings has a mounting groove, the disassembly plate is inserted into the mounting groove, and the fixing stud is connected to the mounting ring and the disassembly plate.

[0012] As a preferred embodiment, the air intake structure further includes a filter screen, which is placed in the air chamber. The lower end of the filter screen is fixedly installed on the upper surface of the disassembly plate, and the upper end of the filter screen abuts against the upper end of the telescopic corrugated pipe. The filter screen is made of a flexible material.

[0013] As a preferred embodiment, the disassembly plate has an air inlet that communicates with the air chamber.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features an air intake structure comprising a telescopic bellows, mounting rings, a screw, a rotating drum, and a mounting plate. The telescopic bellows has an air inlet, an air outlet, and an air chamber. One mounting ring is mounted at the air inlet, and the other at the air outlet. One mounting ring is slidably mounted on the mounting plate, while the other is fixed to the mounting plate. The operator rotates the rotating drum, causing a slider to slide in a groove, which in turn causes the telescopic bellows, fixedly connected to the mounting ring, to stretch or contract along the axial direction of the screw. A shorter telescopic bellows allows for a higher gas flow rate, while a longer telescopic bellows allows for a lower gas flow rate. This design simplifies operation and allows operators to adjust the gas flow rate according to actual requirements, thus expanding the applicability of the equipment.

[0016] This invention features multiple telescopic columns, each connected at both ends to the lower end face of one mounting ring and the upper end face of another. The multiple telescopic columns and screws are arranged in a circle around the center of the mounting rings. As the length of the telescopic bellows changes, the multiple telescopic columns also contract and stretch, ensuring that the telescopic bellows is always compressed and stretched along the axial direction of the screws to prevent the telescopic bellows from bending and increasing gas resistance. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is a structural diagram of the air intake structure of this utility model;

[0019] Figure 3 This is a partial exploded view of the present invention;

[0020] Figure 4 This is a cross-sectional view of the present invention.

[0021] In the diagram: 1. Main body of the device; 2. Air intake structure; 21. Telescopic corrugated pipe; 211. Air inlet; 212. Air outlet; 213. Air chamber; 22. Mounting ring; 221. Slider; 222. Mounting groove; 23. Screw; 24. Rotary drum; 25. Mounting plate; 251. Slide groove; 26. Telescopic column; 27. Disassembly plate; 271. Air inlet hole; 28. Fixing stud; 29. ​​Filter screen. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments.

[0023] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0024] Please see Figure 1-4 This utility model provides an extraction-type gas detection device, comprising:

[0025] Device body 1;

[0026] The air intake structure 2 includes a telescopic bellows 21, a mounting ring 22, a screw 23, a rotating drum 24, and a mounting plate 25. The telescopic bellows 21 has an air inlet 211, an air outlet 212, and an air chamber 213. A pair of mounting rings 22 are provided, one of which is mounted on the end of the telescopic bellows 21 that forms the air inlet 211, and the other is mounted on the end of the telescopic bellows 21 that forms the air outlet 212. One end of the screw 23 is fixedly mounted on the lower end face of one of the mounting rings 22, and one end of the rotating drum 24 is fixedly mounted on the upper end face of the other mounting ring 22. The screw 23 and the rotating drum 24 are threadedly connected. One mounting ring 22 is slidably mounted on the mounting plate 25, and the other mounting ring 22 is fixed to the mounting plate 25. The end of the telescopic bellows 21 that forms the air outlet 212 is connected to the main body 1 of the device.

[0027] The intake structure 2 also includes telescopic columns 26. Multiple telescopic columns 26 are provided. The two ends of the telescopic columns 26 are respectively connected to the lower end face of one mounting ring 22 and the upper end face of another mounting ring 22. The multiple telescopic columns 26 and screws 23 are distributed in a circle with the center of the mounting ring 22 as the center.

[0028] Mounting plate 25 has a groove 251, mounting ring 22 has a slider 221, a pair of sliders 221 on mounting ring 22 are formed on one side, and sliders 221 are slidably placed in groove 251;

[0029] The intake structure 2 also includes a disassembly plate 27 and a fixing stud 28, wherein a mounting ring 22 has a mounting groove 222, the disassembly plate 27 is inserted into the mounting groove 222, and the fixing stud 28 is connected to the mounting ring 22 and the disassembly plate 27.

[0030] The intake structure 2 also includes a filter screen 29, which is placed in the air chamber 213. The lower end of the filter screen 29 is fixedly installed on the upper surface of the disassembly plate 27, and the upper end of the filter screen 29 abuts against the upper end of the telescopic bellows 21. The filter screen 29 is made of a flexible material.

[0031] The disassembly plate 27 has an air inlet 271, which is connected to the air chamber 213.

[0032] Working principle and usage process of this utility model:

[0033] During installation, the worker first installs the mounting ring 22 of the telescopic corrugated pipe 21 at the air inlet 211 onto the main body 1 of the device so that the air chamber 213 is connected to the main body 1 of the device, and fixes the mounting plate 25 in the installation position.

[0034] In use, if the worker needs to reduce or decrease the gas flow rate entering the main body 1 of the device through the air chamber 213, the rotating drum 24 is rotated so that the slider 221 on the mounting ring 22 fixedly connected to the rotating drum 24 slides in the slide groove 251, thereby causing the telescopic bellows 21 fixedly connected to the mounting ring 22 to also stretch or contract along the axial direction of the screw 23; it can be understood that when the length of the telescopic bellows 21 is short, the gas flow resistance in the air chamber 213 is relatively small, so the gas flow rate entering the main body 1 of the device is high; ...1 is short, the gas flow resistance in the air chamber 213 is relatively small, so the gas flow rate entering the main body 1 of the device is high. When the length of 1 is relatively long, the gas flow resistance in the air chamber 213 is relatively large. At this time, the gas flow rate entering the main body 1 of the device is low, the operation is simple, and it is convenient for workers to change the gas flow rate according to actual requirements, thus expanding the applicability of the equipment. During the process of changing the length of the telescopic bellows 21, the filter screen 29 made of flexible material and multiple telescopic columns 26 also contract and stretch accordingly. By setting multiple telescopic columns 26, it is ensured that the telescopic bellows 21 is always compressed and stretched along the axial direction of the screw 23, so as to prevent the telescopic bellows 21 from bending and increasing the gas resistance.

[0035] In addition, after the length of the telescopic bellows 21 is adjusted, the gas passes through the pipe, through the air inlet 271 on the disassembly plate 27 and the air inlet 211 on the telescopic bellows 21, and finally enters the air chamber 213. During the gas flow, impurities in the gas are adsorbed by the filter screen 29 in the air chamber 213, which prevents impurities from entering the device body 1 and clogging parts such as sensors, thus extending the service life of the equipment.

[0036] When the filter screen 29 needs to be replaced and cleaned, the worker first rotates the fixing stud 28 until it is disengaged from the mounting ring 22 and the disassembly plate 27; then removes the disassembly plate 27 from the mounting slot 222. In this way, the filter screen 29 installed on the upper surface of the disassembly plate 27 is also removed. The operation is simple and easy to maintain.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An extraction-type gas detection device, characterized in that, include: Device body (1); An air intake structure (2) includes a telescopic bellows (21), a mounting ring (22), a screw (23), a rotating drum (24), and a mounting plate (25). The telescopic bellows (21) has an air inlet (211), an air outlet (212), and an air chamber (213). A pair of mounting rings (22) are provided, one of which is mounted on the telescopic bellows (21) at one end forming the air inlet (211), and the other is mounted on the telescopic bellows (21) at the end forming the air outlet (213). At one end of 12), one end of the screw (23) is fixedly installed on the lower end face of one of the mounting rings (22), and one end of the rotating cylinder (24) is fixedly installed on the upper end face of the other mounting ring (22). The screw (23) and the rotating cylinder (24) are threadedly connected. One of the mounting rings (22) is slidably installed on the mounting plate (25), and the other mounting ring (22) is fixed to the mounting plate (25). The telescopic bellows (21) is connected to the device body (1) at one end that forms the air outlet (212).

2. The extraction-type gas detection device according to claim 1, characterized in that: The air intake structure (2) also includes telescopic columns (26), and multiple telescopic columns (26) are provided. The two ends of the telescopic columns (26) are respectively connected to the lower end face of one of the mounting rings (22) and the upper end face of another mounting ring (22), and the multiple telescopic columns (26) and the screw (23) are distributed in a circle with the center of the mounting ring (22) as the center.

3. The extraction-type gas detection device according to claim 2, characterized in that: The mounting plate (25) has a groove (251), and the mounting ring (22) has a slider (221). A pair of sliders (221) on the mounting ring (22) are formed on one side, and the sliders (221) are slidably placed in the groove (251).

4. The extraction-type gas detection device according to claim 3, characterized in that: The intake structure (2) further includes a disassembly plate (27) and a fixing stud (28), wherein one of the mounting rings (22) has a mounting groove (222), the disassembly plate (27) is inserted into the mounting groove (222), and the fixing stud (28) is connected to the mounting ring (22) and the disassembly plate (27).

5. The extraction-type gas detection device according to claim 4, characterized in that: The air intake structure (2) also includes a filter screen (29), which is placed in the air chamber (213). The lower end of the filter screen (29) is fixedly installed on the upper surface of the disassembly plate (27), and the upper end of the filter screen (29) abuts against the upper end of the telescopic corrugated pipe (21). The filter screen (29) is made of flexible material.

6. The extraction-type gas detection device according to claim 5, characterized in that: The disassembly plate (27) has an air inlet (271) which is connected to the air chamber (213).

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