A gas sampling device for air quality detection

Abstract

The present invention relates to the field of gas sampling and detection technology, and specifically to a gas sampling device for air quality detection, including a cover body; and a disc member arranged in the middle of the cover body, with a plurality of first electromagnetic suction blocks fixedly connected in an annular structure on the left and right outer walls of the disc member, a circular annular groove on the circumferential outer wall of the disc member, and two through holes in an up-and-down symmetrical structure inside the disc member; an air inlet pipe fixedly installed on both sides of the cover body; and a circular ring member sleeved in the circular annular groove, with a plurality of inclined grooves of arc structure on the left and right outer walls of the circular ring member, and a plurality of connecting holes inside the circular ring member. By providing the disc member, the movable ring and the annular ring, efficient gas collection can be achieved by using negative pressure, and at the same time, in conjunction with the adjusting ring movably connected to the movable ring, automatic opening and closing can be achieved to effectively avoid gas contamination during the collection process.

Description

Technical Field

[0001] The present invention relates to the technical field of gas sampling and detection, and in particular to a gas sampling device for air quality detection. Background Art

[0002] Air quality testing refers to the testing of air quality. The quality of air quality reflects the concentration of pollutants in the air. Air pollution is a complex phenomenon, and the concentration of air pollutants at a specific time and place is affected by many factors.

[0003] In order to ensure the accuracy of gas detection results and better analyze the air quality, air is usually collected intermittently in a fixed area. When using existing gas collection equipment, gas collection relies on the natural flow of air, and the gas collection efficiency is low. After each collection, the storage tube needs to be manually replaced, which easily causes the gas sample to be contaminated, resulting in inaccurate subsequent air quality analysis results. In view of this, we propose a gas sampling device for air quality detection. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a gas sampling device for air quality detection, which can effectively solve the problem that when the existing gas collection equipment is used, gas collection relies on the natural flow of air, the gas collection efficiency is low, and after each collection is completed, the storage tube needs to be manually replaced, which easily leads to gas samples being contaminated, resulting in inaccurate subsequent air quality analysis results.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a gas sampling device for air quality detection, comprising a cover body;

[0007] And, a disc member is arranged in the middle of the cover body, and the outer walls on the left and right sides of the disc member are annularly fixedly connected with a plurality of first electromagnetic suction blocks, and a circular groove is provided on the circumferential outer wall of the disc member, and two through holes are provided in the inner part of the disc member in an up-and-down symmetrical structure;

[0008] Air intake pipes are fixedly installed on both sides of the cover body, and the air intake pipes are fixedly connected to the disc member through a plurality of connecting frames, and a second electromagnetic suction block is fixedly installed on the outer wall of one side of the air intake pipe;

[0009] And, a circular ring member sleeved in the circular groove, a plurality of inclined grooves of arc-shaped structures are provided on the outer walls on the left and right sides of the circular ring member, and a plurality of connecting holes are provided inside the circular ring member, the connecting holes are fixedly connected to corresponding connecting pipes fixedly installed on the outer wall of the circular ring member, and the ends of the connecting pipes are fixedly connected to the sampling tubes;

[0010] And, a movable ring that maintains relative movement with the disc member, the movable ring and the middle part of the disc member are connected by an annular ring, and an air storage chamber is formed inside the annular ring, and also includes an adjusting ring that is movably connected to the middle part of the movable ring, the adjusting ring and the air inlet pipe are connected by a telescopic tube, a plurality of magnetic rings are fixedly installed on the outer wall of the movable ring, an abutment rod that slides with the inclined groove is fixedly installed on the outer wall of the movable ring, and a magnetic block is fixedly installed on the outer wall of the adjusting ring.

[0011] Furthermore, on the outer walls of both sides of the cover body, a plurality of strip grooves are evenly penetrated in an annular structure, an air outlet pipe is fixedly installed on the outer end of the sampling tube, the end of the air outlet pipe corresponds to the position of the strip groove, and a valve is fixedly installed on the end of the air outlet pipe; the end of the air inlet pipe passes through the cover body and maintains communication with the outside air; and a support frame is fixedly installed on the lower outer wall of the cover body.

[0012] Furthermore, the inner end outlets of the two through holes are respectively located on the left and right outer walls of the disc, and hard tubes are fixedly installed at the outer end outlets of the through holes; a rounded corner is provided at the outlet of the connecting hole, and the outer wall of the hard tube slides in cooperation with the rounded corner at the outlet of the connecting hole.

[0013] Furthermore, a limiting hole is provided through the middle of the movable ring, and the limiting hole and the adjusting ring are slidably fitted together, and a plurality of ventilation holes are evenly provided on the circumferential outer wall of the adjusting ring; a connecting sleeve is fixedly installed on the movable ring, and the interior of the connecting sleeve is elastically connected to the adjusting ring through a spring.

[0014] Furthermore, the position of the first electromagnetic suction block corresponds to the position of the magnetic ring; in the sampling stage, the first electromagnetic suction block is connected to the external power supply, the first electromagnetic suction block and the magnetic ring are magnetically repelled, the air storage chamber space inside the annular ring becomes larger and forms a negative pressure, and the external gas will pass through the air inlet pipe, flow through the air vent and enter the air storage chamber; it also includes an adjustment module for adjusting the power-on state of the first electromagnetic suction block and the second electromagnetic suction block; the adjustment module includes a trigger switch arranged on the outer wall of the second electromagnetic suction block, when the outer wall of the magnetic block contacts the trigger switch, the first electromagnetic suction block is powered off, and the second electromagnetic suction block is powered on; in the storage stage, the second electromagnetic suction block is connected to the external power supply, the second electromagnetic suction block and the magnetic block are magnetically repelled, the adjustment ring and the moving ring are reset, and the gas in the air storage chamber flows through the through hole, the hard tube and enters the sampling tube.

[0015] Furthermore, it also includes a plurality of limit frames fixedly mounted on the circumferential outer wall of the disc member, and the abutment rod passes through the limit frame and slidably cooperates with the outer wall of the inclined groove; during the storage stage, when the end of the abutment rod contacts the inner wall of the inclined groove, it will drive the set circular ring member to rotate around its central axis, and at this time the end of the hard tube will slide on the inner wall of the circular ring member and finally be located at the adjacent connecting hole position.

[0016] Furthermore, a magnetic piece A is provided at the end of the hard tube, and a magnetic piece B is provided at the rounded corner position of the connecting hole, and the magnetic piece A and the magnetic piece B are magnetically adsorbed.

[0017] Beneficial Effects

[0018] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention can realize efficient gas collection by means of negative pressure through the provision of a disc member, a movable ring and an annular ring. At the same time, in conjunction with an adjustment ring movably connected to the movable ring, automatic opening and closing can be realized to effectively avoid gas contamination during the collection process. At the same time, combined with the cooperation relationship between the provided abutment rod and the inclined groove, automatic replacement of the sampling tube can be realized, effectively improving the gas collection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the gas sampling device of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the cover body of the present invention;

[0023] Figure 3 It is a schematic diagram of the overall structure of the disc member of the present invention;

[0024] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the disc member of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure when the moving ring and the circular ring member of the present invention are separated;

[0026] Figure 6 It is a schematic diagram of the cross-sectional structure of the circular ring member of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the present invention when the moving ring and the adjusting ring are separated;

[0028] Figure 8 It is a schematic diagram of the rotation direction of the circular ring member when the abutment rod of the present invention cooperates with the inclined groove;

[0029] Fig. 9This is a schematic diagram of the structural changes of the moving ring, the adjusting ring and the annular ring during the gas sampling stage of the present invention.

[0030] Reference numerals

[0031] 100, cover body; 101, strip groove; 110, support frame;

[0032] 200, disc; 201, through hole; 202, annular groove; 210, first electromagnetic suction block; 220, limit frame; 230, connecting frame; 240, air intake pipe; 250, second electromagnetic suction block; 260, hard pipe;

[0033] 300, circular ring; 301, inclined groove; 302, connecting hole; 310, connecting tube; 320, sampling tube;

[0034] 400, moving ring; 410, annular ring; 420, magnetic ring; 430, abutting rod; 440, connecting sleeve;

[0035] 500, adjusting ring; 501, vent hole; 510, magnetic block; 520, spring;

[0036] 600. Telescopic tube. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention will be further described below in conjunction with the embodiments.

[0039] Example:

[0040] See attached Figure 1-9 As shown in the figure, a gas sampling device for air quality detection includes a cover body 100; specifically, in the present application, the cover body 100 is composed of two detachably connected shells, and is located so that the sampling device can be stably placed in the sampling area. A support frame 110 is arranged on the lower outer wall of the cover body 100. As an embodiment, the support frame 110 can be placed on a plane through a bracket, or it can be installed at a specific height using external fasteners, so as to collect air at different heights to better obtain gas samples.

[0041] In the present application, the disc member 200 is located in the middle of the cover body 100, and the two sides of the disc member 200 are fixedly connected with the air intake pipe 240 through the connecting frame 230. Specifically, the two air intake pipes 240 pass through the outer walls of the cover body 100 on both sides and maintain communication with the external air. In the present application, the air intake pipe 240 is used as a gas collection channel.

[0042] In the present application, the core of the gas sampling device is to use negative pressure to achieve rapid gas collection. Located on both sides of the above-mentioned disc 200, there are two movable rings 400 elastically connected through an annular ring 410. The disc 200 and the movable ring 400 maintain relative movement. Located in the inner position of the annular ring 410, the disc 200 and the movable ring 400 block the positions of both ends of the annular ring 410, and a relatively sealed space is formed in the middle of the annular ring 410. For the convenience of subsequent description, it is called a gas storage chamber in the present application;

[0043] Regarding how to realize gas collection, in the present application, a plurality of first electromagnetic suction blocks 210 are fixedly connected in an annular structure on the outer walls on the left and right sides of the disc 200, and a plurality of magnetic rings 420 are fixedly installed on the outer wall of the corresponding moving ring 400. The position of the first electromagnetic suction block 210 corresponds to the position of the magnetic ring 420. During the gas sampling stage, the first electromagnetic suction block 210 is connected to the external power supply. As an implementation method, the time node when the first electromagnetic suction block 210 is connected to the external power supply can be controlled by a delay program. The first electromagnetic suction block 210 and the magnetic ring 420 are magnetically repelled. Under the action of the magnetic repulsive force, the corresponding moving ring 400 will move in a direction away from the disc 200. At this time, the space of the gas storage cavity at the internal position of the annular ring 410 becomes larger. Since the external air pressure remains unchanged, a pressure difference will be formed between the inside of the annular ring 410 and the outside air. By utilizing the pressure difference, the external gas will enter the gas storage cavity to realize gas sampling.

[0044] It should be noted that, in the present application, an adjusting ring 500 is elastically connected to the middle of the moving ring 400, and the adjusting ring 500 is connected to the air inlet pipe 240 through a telescopic tube 600. The adjusting ring 500 can be understood as a switch, which is used to adjust the connection relationship between the air storage chamber and the external air; first of all, it should be mentioned that a limiting hole is provided through the middle of the moving ring 400, and the limiting hole and the adjusting ring 500 are slidably matched, and a plurality of vents 501 are evenly provided on the circumferential outer wall of the adjusting ring 500; a connecting sleeve 440 is fixedly installed on the moving ring 400, and the interior of the connecting sleeve 440 is elastically connected to the adjusting ring 500 through a spring 520. When gas sampling is not performed, under the action of the spring 520, the adjusting ring 500 will The limiting hole in the middle of the movable ring 400 is blocked, and the inside of the air storage chamber is isolated from the external gas. Furthermore, when the movable ring 400 slides relative to the disc member 200, the external air pressure will drive the set adjustment ring 500 to move toward the direction of the disc member 200. At this time, the external gas will enter the interior of the air storage chamber through the inside of the adjustment ring 500 and the multiple air holes 501 opened on the outer wall of the circumference of the adjustment ring 500. In the present application, a depression is provided in the middle of the adjustment ring 500, and the air holes 501 are located on the side walls of the depression. Then, when the space of the air storage chamber inside the annular ring 410 becomes larger and forms a negative pressure, the external gas will pass through the air inlet pipe 240, flow through the air holes 501 and enter the inside of the air storage chamber, thereby realizing rapid sampling of the gas.

[0045] The automatic adjustment of the adjusting ring 500 should be explained that, as the sampling continues, when the external gas quickly enters the air storage chamber, the air pressure inside the air storage chamber and the external air is balanced. Under the action of the spring 520, the corresponding adjusting ring 500 will gradually move toward a position away from the disc 200, and the outer wall of the adjusting ring 500 will be used to block the limit hole again. After the gas sampling is completed in a short time, the automatic sealing of the air storage chamber can be completed. The above process can be referred to the attached Fig. 9 as shown in .

[0046] In order to collect multiple groups of gas samples in different time periods to obtain more abundant gas data, in the present application, after the gas collection process described above, it is necessary to temporarily store the gas samples in the gas storage chamber. Therefore, in the present application, a circular groove 202 is provided on the circumferential outer wall of the disc 200, and two through holes 201 are provided in the inner part of the disc 200 in a vertically symmetrical structure; and a second electromagnetic suction block 250 is fixedly installed on the outer wall of one side of the air inlet pipe 240; and an adjustment module is also included for adjusting the power-on state of the first electromagnetic suction block 210 and the second electromagnetic suction block 250; the adjustment module includes a second electromagnetic suction block 210 and a second electromagnetic suction block 250 arranged on the second electromagnetic suction block 210. The trigger switch on the outer wall of the electromagnetic suction block 250 is turned on. When the outer wall of the magnetic block 510 contacts the trigger switch, the first electromagnetic suction block 210 is powered off, while the second electromagnetic suction block 250 is powered on. In the storage stage, the second electromagnetic suction block 250 remains connected to the external power supply. It should be noted that when the second electromagnetic suction block 250 is powered on, the first electromagnetic suction block 210 is powered off. The stage states of the two are always in opposite states. The second electromagnetic suction block 250 and the magnetic block 510 are magnetically repelled, and the adjustment ring 500 and the moving ring 400 are reset. At this time, the gas in the gas storage cavity flows through the through hole 201 and the hard tube 260 and enters the sampling tube 320.

[0047] Specifically, when the second electromagnetic suction block 250 and the magnetic block 510 are magnetically repelled, the movable ring 400 is reset and moves toward a position close to the disc member 200. At this time, the internal space of the air storage chamber will be compressed. Combined with the through hole 201 opened on the disc member 200, the inner end outlets of the two through holes 201 are respectively located on the left and right outer walls of the disc member 200, and the outer end outlets of the through holes 201 are fixedly installed with hard tubes 260, and the circular ring member 300 sleeved in the circular groove 202, and the outer walls of the left and right sides of the circular ring member 300 are provided with a plurality of inclined grooves 301 with arc structures, and a plurality of connecting holes 302 are opened inside the circular ring member 300, and the connecting holes 302 are fixedly connected to the corresponding connecting tubes 310 fixedly installed on the outer wall of the circular ring member 300, and the ends of the connecting tubes 310 A sampling tube 320 is fixedly connected, and the hard tube 260 can maintain communication with the connecting hole 302 opened on the circular ring member 300. During this process, the gas in the gas storage cavity will enter the interior of the sampling tube 320 through the connecting tube 310, and an air outlet pipe is fixedly installed on the outer end of the sampling tube 320, and the end of the air outlet pipe corresponds to the position of the strip groove 101, and a valve is fixedly installed on the end of the air outlet pipe. In the storage stage, the valve is in a closed state. When all the sampling tubes 320 are sampled, the sampling tubes 320 in symmetrical positions can be obtained respectively and marked as the same group for comparison tests. It should be noted that since the opening positions of the corresponding through holes 201 are symmetrical, the gases in the two gas storage cavities will enter the interiors of the two sampling tubes 320 in symmetrical positions respectively when being stored;

[0048] As an implementation mode, a plurality of strip grooves 101 are evenly penetrated in an annular structure on the outer walls on both sides of the cover body 100. The gas inside the sampling tube 320 can be directly obtained by opening the valve. According to different needs, the sampling tube 320 can be connected to the connecting tube 310 by a threaded connection, and a valve core is provided at the connection. When the threaded matching relationship between the two is released, the valve core will seal the end of the sampling tube 320, and the sampling tube 320 can be taken out from the inside of the cover body 100 for subsequent gas analysis experiments.

[0049] The above mentioned how the sampling tube 320 realizes gas sampling, but in order to more accurately obtain the gas composition information or pollution conditions in the sampling area, it is usually necessary to collect multiple sets of samples. Therefore, in the gas sampling link, multiple sampling tubes 320 are required to store air samples at different times. Therefore, in this application, it is necessary to replace the sampling tube 320 that is connected to the gas storage chamber;

[0050] For details, please refer to the attached Figure 5-8 As shown in, in the present application, a plurality of magnetic rings 420 are fixedly mounted on the outer wall of the movable ring 400, an abutment rod 430 which is slidably matched with the inclined groove 301 is fixedly mounted on the outer wall of the movable ring 400, a magnetic block 510 is fixedly mounted on the outer wall of the adjusting ring 500, and also includes a plurality of limit frames 220 fixedly mounted on the circumferential outer wall of the disc member 200, the abutment rod 430 passes through the limit frames 220 and slidably matches with the outer wall of the inclined groove 301; in the storage stage, when the end of the abutment rod 430 contacts the inner wall of the inclined groove 301, it will drive the set circular ring member 300 to rotate around its central axis, at this time, the end of the hard tube 260 will slide on the inner wall of the circular ring member 300, and finally be located at the adjacent connecting hole 302. It should be noted that in In the present application, when the moving ring 400 approaches the position close to the circular ring member 300, the abutment rod 430 fixedly mounted on the circumferential outer wall of the moving ring 400 will pass through the limit frame 220, and the end of the abutment rod 430 will contact the inner wall of the inclined groove 301. It should be noted that the inclined groove 301 mentioned in the present application has a height difference between the bottom inner wall thereof. When the abutment rod 430 contacts the inclined groove 301 and moves toward the position of the disc member 200, the circular ring member 300 slidably connected to the outer wall of the disc member 200 will rotate around its axis. When the moving ring 400 is completely reset, the corresponding abutment rod 430 is at the bottommost position of the inclined groove 301. At this time, the gas sample in the gas storage cavity has completely entered the interior of the sampling tube 320.

[0051] It should be noted that, in the above process, when the circular ring member 300 rotates relative to the circular disc member 200 in the circular groove 202, the corresponding connecting hole 302 opened on the circular ring member 300 will be misaligned with the hard tube 260. At this time, the end of the hard tube 260 will be blocked. As the circular ring member 300 continues to rotate, the hard tube 260 will move to the position of the adjacent connecting hole 302. Specifically, in order to ensure that the hard tube 260 can be stably connected to the adjacent connecting hole 302 for the next gas sampling, in the present application, the connecting hole 30 The outlet position is provided with a rounded corner, and the outer wall of the hard tube 260 is slidably matched with the rounded corner of the outlet position of the connecting hole 302. A magnetic piece A is provided at the end of the hard tube 260, and a magnetic piece B is provided at the rounded corner position of the connecting hole 302. There is magnetic adsorption between the magnetic pieces A and B. When the abutting rod 430 is moved out of the inclined groove 301, the hard tube 260 will be connected with the connecting hole 302 under the action of the magnetic adsorption force between the magnetic pieces A and B. As an implementation method, a sealing ring can be provided at the position of the connecting hole 302 to ensure air tightness.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas sampling device for air quality detection, characterized in that: include: Cover body (100); and a disc member (200) disposed in the middle of the cover body (100), wherein a plurality of first electromagnetic suction blocks (210) are fixedly connected in an annular structure on the left and right outer walls of the disc member (200), an annular groove (202) is provided on the circumferential outer wall of the disc member (200), and two through holes (201) are provided in an upper and lower symmetrical structure inside the disc member (200); An air intake pipe (240) is fixedly installed on both sides of the cover body (100); the air intake pipe (240) is fixedly connected to the disc member (200) via a plurality of connecting frames (230); and a second electromagnetic suction block (250) is fixedly installed on an outer wall of one side of the air intake pipe (240); And, a circular ring member (300) sleeved in the circular ring groove (202), a plurality of inclined grooves (301) of arc-shaped structures are provided on the outer walls on the left and right sides of the circular ring member (300), and a plurality of connecting holes (302) are provided inside the circular ring member (300), the connecting holes (302) are fixedly connected to corresponding connecting tubes (310) fixedly installed on the outer wall of the circular ring member (300), and the end of the connecting tube (310) is fixedly connected to a sampling tube (320); And, a moving ring (400) that is relatively movable with the disc member (200), the moving ring (400) being connected to the middle of the disc member (200) via an annular ring (410), and forming an air storage chamber inside the annular ring (410), and also comprising an adjusting ring (500) that is movably connected to the middle of the moving ring (400), the adjusting ring (500) being connected to the air inlet pipe (240) via a telescopic tube (600), a plurality of magnetic rings (420) being fixedly mounted on the outer wall of the moving ring (400), an abutting rod (430) that is slidably matched with the inclined groove (301) being fixedly mounted on the outer wall of the moving ring (400), and a magnetic block (510) being fixedly mounted on the outer wall of the adjusting ring (500).

2. A gas sampling device for air quality detection according to claim 1, characterized in that: On the outer walls of both sides of the cover body (100), a plurality of strip grooves (101) are evenly penetrated in an annular structure, and an air outlet pipe is fixedly installed on the outer end of the sampling tube (320), the end of the air outlet pipe corresponds to the position of the strip groove (101), and a valve is fixedly installed on the end of the air outlet pipe; The end of the air inlet pipe (240) passes through the cover body (100) and is in communication with the outside air; and a support frame (110) fixedly mounted on the lower outer wall of the cover body (100).

3. A gas sampling device for air quality detection according to claim 2, characterized in that: The inner end outlets of the two through holes (201) are respectively located on the left and right outer walls of the disc member (200), and hard pipes (260) are fixedly installed at the outer end outlets of the through holes (201); A rounded corner is provided at the outlet of the connection hole (302), and the outer wall of the hard tube (260) is slidably matched with the rounded corner at the outlet of the connection hole (302).

4. A gas sampling device for air quality detection according to claim 3, characterized in that: A limiting hole is formed through the middle of the movable ring (400), the limiting hole is slidably engaged with the adjusting ring (500), and a plurality of vent holes (501) are evenly formed on the outer circumferential wall of the adjusting ring (500); A connecting sleeve (440) is fixedly mounted on the movable ring (400), and the interior of the connecting sleeve (440) is elastically connected to the adjusting ring (500) via a spring (520).

5. A gas sampling device for air quality detection according to claim 4, characterized in that: The position of the first electromagnetic suction block (210) corresponds to the position of the magnetic ring (420); During the sampling phase, the first electromagnetic suction block (210) is connected to an external power source, the first electromagnetic suction block (210) and the magnetic ring (420) are magnetically repelled, the air storage cavity space inside the annular ring (410) becomes larger and forms a negative pressure, and the external gas passes through the air inlet pipe (240), flows through the air vent (501) and enters the air storage cavity; It also includes an adjustment module, which is used to adjust the power-on state of the first electromagnetic suction block (210) and the second electromagnetic suction block (250); The regulating module comprises a trigger switch arranged on the outer wall of the second electromagnetic suction block (250); when the outer wall of the magnetic block (510) contacts the trigger switch, the first electromagnetic suction block (210) is powered off, while the second electromagnetic suction block (250) is powered on; During the storage phase, the second electromagnetic suction block (250) remains connected to the external power supply, the second electromagnetic suction block (250) and the magnetic block (510) are magnetically repelled, the adjustment ring (500) and the movable ring (400) are reset, and the gas in the gas storage chamber flows through the through hole (201), the hard tube (260) and enters the interior of the sampling tube (320).

6. A gas sampling device for air quality detection according to claim 5, characterized in that: It also includes a plurality of limit frames (220) fixedly mounted on the circumferential outer wall of the disc member (200), and the abutment rod (430) passes through the limit frames (220) and slidably cooperates with the outer wall of the inclined groove (301); During the storage phase, when the end of the abutment rod (430) contacts the inner wall of the inclined groove (301), it drives the provided circular ring member (300) to rotate around its central axis. At this time, the end of the hard tube (260) slides on the inner wall of the circular ring member (300) and is finally located at the adjacent connection hole (302).

7. A gas sampling device for air quality detection according to claim 6, characterized in that: A magnetic piece A is provided at the end of the hard tube (260), and a magnetic piece B is provided at the rounded corner of the connection hole (302), and the magnetic piece A and the magnetic piece B are magnetically adsorbed.

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