A sampling device for atmospheric environment detection

Abstract

The present invention discloses a sampling device for atmospheric environment detection based on the Internet of Things, which relates to the technical field of sampling devices, including a sampling tube, a slide groove is provided on the surface of the sampling tube, a plurality of groups of air inlet holes are provided inside the slide groove, a limiting ring is fixedly connected to the surface of the sampling tube, an air outlet hole is provided on the limiting ring, a retaining ring is rotatably connected to the limiting ring, an air outlet pipe is fixedly connected to the retaining ring, the air outlet pipe and the air outlet hole are interconnected, an inspection head is threadedly connected to one end of the sampling tube, a liner ring is fixedly installed inside the sampling tube, a pair of fixed columns are fixedly connected inside the liner ring, and a pressure ring is fixedly connected to the pair of fixed columns. The present invention has a reasonable structure, and the gas can enter the interior of the sampling tube through the air inlet hole through the sealing component, and then the atmosphere can enter the interior of the sampling tube for sampling through the cooperation of the limiting component and the stretching component.

Description

Technical Field

[0001] The invention relates to the technical field of sampling devices, and in particular to a sampling device for atmospheric environment detection. Background Art

[0002] Atmospheric sampling in environmental testing is the process of collecting gas samples or polluted air samples in the atmosphere. Atmospheric sampling is an important step in atmospheric environmental testing and is extremely important for the reliability of test data. One type of sampling method is to allow a large amount of air to pass through a liquid absorbent or solid adsorbent to enrich pollutants with lower concentrations in the atmosphere, such as the vacuum method and the membrane filter method. The other type is to use a container to collect air containing pollutants. When the concentration of the measured component in the atmosphere is high or the analysis method is very sensitive, a direct sampling method is used. Commonly used sampling containers include syringes, plastic bags, and some fixed containers.

[0003] Most of the existing atmospheric sampling is carried out through professional equipment, but the professional atmospheric sampling equipment is large in size. When sampling the atmosphere in some harsh environments, it is inconvenient to carry the professional atmospheric sampling equipment due to its large size. Summary of the invention

[0004] The purpose of the present application is to provide a sampling device for atmospheric environment detection, which enables gas to enter the interior of the sampling tube through the air inlet hole through a sealing component, and then facilitates the entry of atmosphere into the sampling tube for sampling through the cooperation of a limiting component and a stretching component.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a sampling device for atmospheric environment detection, comprising a sampling cylinder, a slide groove is provided on the surface of the sampling cylinder, a plurality of groups of air inlet holes are provided inside the slide groove, a limit ring is fixedly connected to the surface of the sampling cylinder, an air outlet hole is provided on the limit ring, a retaining ring is rotatably connected to the limit ring, an air outlet pipe is fixedly connected to the retaining ring, the air outlet pipe and the air outlet hole are communicated with each other, an inspection head is threadedly connected to one end of the sampling cylinder, a liner ring is fixedly installed inside the sampling cylinder, a pair of fixed columns are fixedly connected inside the liner ring, a pair of fixed columns are fixedly connected to a pressure ring, a filter cartridge is provided inside the liner ring, a card slot is provided on the filter cartridge, the fixed column is clamped inside the card slot, and a pull column is fixedly connected to the filter cartridge; it also includes a closing component, a limiting component and a stretching component, the closing component is arranged inside the slide groove for blocking the air inlet hole, the limiting component is arranged on the fixed plate for use with the closing component, and the stretching component is arranged inside the sampling cylinder for collecting gas.

[0006] Preferably, the closing assembly includes a shielding sleeve slidably connected to the inside of the slide groove, the outer surface of the shielding sleeve is fixedly connected to a plurality of docking seats, the docking seats are fixedly connected to side panels, the other end of the side panels is movably inserted on the sleeve, the sleeve is fixedly mounted on a fixed plate, and the fixed plate is fixedly connected to the other end of the sampling cylinder.

[0007] Preferably, one end of the side plate is fixedly connected with a ring, and a first spring is sleeved on the side plate. Two ends of the first spring are respectively fitted with one side of the docking seat and one side of the sleeve seat. The surface of the shielding sleeve is fixedly connected with a fixing seat, and one side of the fixing seat is fixedly connected with a toothed plate.

[0008] Preferably, a pair of support plates are fixedly connected to the top position of the fixed plate, a positioning plate is fixedly connected to the other end of the pair of support plates, a handle is fixedly connected to the middle position of the positioning plate, a gear is meshed on the tooth plate, one end of the gear is fixedly connected to a turntable, the gear is rotatably connected to a limit seat, and the limit seat is fixedly installed on the outer surface of one of the support plates.

[0009] Preferably, the limit assembly includes an adjustment block fixedly mounted on the outer surface of the fixed disk, a pair of top plates being fixedly connected to the adjustment block, through grooves being provided on the pair of top plates, a sliding seat being slidably connected inside the through grooves, a one-way tooth being fixedly connected to the middle position of the sliding seat, and the one-way tooth being clamped on the tooth plate.

[0010] Preferably, one end of the slide seat is sleeved on the slide rod, the top end of the slide rod is fixedly connected to the top seat, the top seat is fixedly connected to the outer side of the top plate, the other end of the slide rod is fixedly connected with a retaining ring, the slide rod is sleeved with a second spring, and the two ends of the second spring are respectively fixedly connected to the bottom surface of the slide seat and the top surface of the retaining ring.

[0011] Preferably, the stretching assembly includes a piston slidably connected to the inside of the sampling cylinder, a pull rod is fixedly connected to the piston, one end of the pull rod is movably inserted on the baffle, both ends of the baffle are fixedly connected to the inner wall of the sampling cylinder, and a third spring is sleeved on the pull rod, and both ends of the third spring are respectively fixedly connected to one side of the piston and one side of the baffle.

[0012] Preferably, one end of the pull rod is fixedly connected to a docking joint, a pair of cross bars are fixedly connected to the surface of the docking joint, guide grooves are symmetrically provided on the surface of the sampling tube, the cross bars extend outside the sampling tube through the guide grooves, and an arm plate is sleeved on one end of the cross bars.

[0013] Preferably, the other end of the arm plate is sleeved on the moving rod, a moving block is fixedly installed at the middle end of the moving rod, a pulley is rotatably connected to the moving block, the pulley is slidably connected to the baffle rod, and both ends of the baffle rod are respectively fixedly connected to the inner walls of the fixed plate and the positioning plate.

[0014] Preferably, the movable block is fixedly connected with an adjusting shaft, one end of the adjusting shaft is rotatably connected with a rotating sleeve, and a clamping rod is fixedly connected to the rotating sleeve, wherein a movable groove is provided on the other support plate, and a plurality of groups of limiting grooves are provided on the support plate, the movable groove and the limiting grooves are connected with each other, and one end of the clamping rod extends to the outside of the support plate through the movable groove.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The present invention has a reasonable structure. When the shielding sleeve is moved, the turntable is rotated to rotate the gear, and the gear and the toothed plate are moved. The movement of the toothed plate drives the shielding sleeve to move through the docking seat, so that the shielding sleeve slides inside the slide slot. The sliding of the shielding sleeve opens the air inlet on the slide slot, so that the external gas enters the interior of the sampling tube for collection.

[0017] 2. In the present invention, the tooth plate is slidably connected to the inside of the adjusting block, and a one-way latch tooth is arranged inside the adjusting block. Since a slope is arranged on one side of the one-way latch tooth, when the tooth plate moves in one direction, the tooth plate will lift the one-way latch tooth without being blocked by the one-way latch tooth. When the one-way latch tooth moves, the slide seat will slide on the slide rod, thereby increasing the stability of the movement of the one-way latch tooth. The movement of the slide seat will pull the second spring to prevent the tooth plate from retracting by the elastic force of the first spring. The movement of the tooth plate facilitates the shielding sleeve to slide inside the slide groove, thereby facilitating the external gas to enter the interior of the sampling cylinder through the air inlet hole for sampling.

[0018] 3. In the present invention, when it is necessary to sample the atmosphere, the card rod is pulled to drive the moving block to move through the adjusting shaft. The movement of the moving block causes the pulley to slide on the baffle rod, thereby increasing the stability of the movement of the moving block. A moving rod is fixedly connected to the moving block. One end of the moving rod is sleeved with an arm plate. The arm plate is moved by the movement of the moving block. The other end of the arm plate is sleeved on the cross bar. The movement of the cross bar drives the joint to move. The joint is fixedly connected to the pull rod. The movement of the joint drives the piston to slide inside the sampling cylinder through the pull rod, so that the external gas enters the sampling cylinder through the air inlet hole for collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the sampling tube;

[0021] Figure 2 It is a schematic diagram of the rear-view stereoscopic structure of the sampling tube;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the sampling tube from a side view;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the cross section of the sampling tube;

[0024] Figure 5 It is a schematic diagram of the internal three-dimensional structure of the sampling tube;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the filter cartridge;

[0026] Figure 7 It is a schematic diagram of the local cross-sectional structure of the support plate;

[0027] Figure 8 for Figure 1 Enlarged structural diagram at A in the middle.

[0028] In the figure: 1. sampling cylinder; 101. slide; 102. air inlet; 103. stop ring; 104. air outlet; 105. retaining ring; 106. air outlet pipe; 107. inspection head; 108. lining ring; 109. fixing column; 110. pressing ring; 112. filter cartridge; 113. slot; 114. pulling column; 2. shielding sleeve; 201. docking seat; 202. side plate; 203. sleeve seat; 204. fixing plate; 205. sleeve ring; 206. first spring; 207. fixing seat; 208. tooth plate; 209. support plate; 210. positioning plate; 211. handle; 212. gear; 2 13. Turntable; 214. Limit seat; 3. Adjustment block; 301. Top plate; 302. Through groove; 303. Sliding seat; 304. One-way clamping tooth; 305. Sliding rod; 306. Top seat; 307. Clamping ring; 308. Second spring; 4. Piston; 401. Pull rod; 402. Baffle plate; 403. Third spring; 404. Butt joint; 405. Cross bar; 406. Guide groove; 407. Arm plate; 409. Moving rod; 410. Moving block; 411. Pulley; 412. Baffle rod; 413. Adjustment shaft; 414. Rotating sleeve; 415. Clamping rod; 416. Movable groove; 417. Limit groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0030] Example: Reference Figure 1 - Figure 8 The sampling device for atmospheric environment detection shown in the figure comprises a sampling tube 1, a slide groove 101 is provided on the surface of the sampling tube 1, a plurality of groups of air inlet holes 102 are provided inside the slide groove 101, a limiting ring 103 is fixedly connected to the surface of the sampling tube 1, an air outlet hole 104 is provided on the limiting ring 103, a retaining ring 105 is rotatably connected to the limiting ring 103, an air outlet pipe 106 is fixedly connected to the retaining ring 105, and the air outlet pipe 106 and the air outlet hole 104 are connected to each other, an inspection head 107 is threadedly connected to one end of the sampling tube 1, a liner ring 108 is fixedly installed inside the sampling tube 1, and the inner fixed connection of the liner ring 108 A pair of fixed columns 109 are connected, and a pressure ring 110 is fixedly connected to the pair of fixed columns 109. A filter cartridge 112 is arranged inside the liner ring 108, and a slot 113 is opened on the filter cartridge 112. The fixed column 109 is clamped inside the slot 113, and a pulling column 114 is fixedly connected to the filter cartridge 112; it also includes a closing component, a limiting component and a stretching component. The closing component is arranged inside the slide groove 101 for sealing the air inlet 102, the limiting component is arranged on the fixed plate 204 for use with the closing component, and the stretching component is arranged inside the sampling tube 1 for collecting gas.

[0031] Specifically, when the sampling tube 1 samples the atmosphere, the shielding sleeve 2 moves so that the interior of the sampling tube 1 is connected to the outside through the air inlet 102, and then the gas enters the interior of the sampling tube 1 through the cooperation of the stretching assembly, and then the impurities in the gas entering the interior of the sampling tube 1 are filtered by the filter tube 112. At this time, the air outlet 104 and the air outlet pipe 106 are not connected. The air inlet 102 is closed by the shielding sleeve 2, and then the pipeline and the air outlet pipe 106 are connected, and then the retaining ring 105 is rotated so that the air inside the sampling tube 1 enters the air outlet pipe 106 through the air outlet 104 to be discharged, thereby completing the sampling of the atmosphere.

[0032] As an implementation method in this embodiment, the sealing component includes a shielding sleeve 2 slidably connected to the inside of the slide groove 101, and the outer surface of the shielding sleeve 2 is fixedly connected to a plurality of docking seats 201, and the docking seat 201 is fixedly connected to a side plate 202, and the other end of the side plate 202 is movably inserted on the sleeve 203, and the sleeve 203 is fixedly installed on the fixed disk 204, and the fixed disk 204 is fixedly connected to the other end of the sampling tube 1, and one end of the side plate 202 is fixedly connected to a collar 205, and the side plate 202 is sleeved with a first spring 206, and the two ends of the first spring 206 are respectively connected to one side of the docking seat 201 and the sleeve One side of the seat 203 fits together, and the surface of the shielding sleeve 2 is fixedly connected with a fixed seat 207, one side of the fixed seat 207 is fixedly connected with a tooth plate 208, and the top position of the fixed disk 204 is fixedly connected with a pair of support plates 209, and the other end of the pair of support plates 209 is fixedly connected with a positioning disk 210, and the middle position of the positioning disk 210 is fixedly connected with a handle 211, and a gear 212 is meshed on the tooth plate 208, and one end of the gear 212 is fixedly connected with a turntable 213, and the gear 212 is rotatably connected to a limit seat 214, and the limit seat 214 is fixedly installed on the outer surface of one of the support plates 209.

[0033] Specifically, when the shielding sleeve 2 is moved, the turntable 213 is rotated to rotate the gear 212, and the gear 212 and the tooth plate 208 move. The movement of the tooth plate 208 drives the shielding sleeve 2 to move through the docking seat 201, thereby facilitating the shielding sleeve 2 to slide inside the slide groove 101. The sliding of the shielding sleeve 2 causes the air inlet 102 on the slide groove 101 to open, thereby facilitating the external gas to enter the interior of the sampling tube 1 for collection.

[0034] As an implementation method in this embodiment, the limit assembly includes an adjustment block 3 fixedly mounted on the outer surface of the fixed disk 204, a pair of top plates 301 are fixedly connected to the adjustment block 3, a through groove 302 is opened on the pair of top plates 301, a slide seat 303 is slidably connected inside the through groove 302, a one-way clamping tooth 304 is fixedly connected to the middle position of the slide seat 303, the one-way clamping tooth 304 is clamped on the tooth plate 208, one end of the slide seat 303 is sleeved on the slide rod 305, the top end of the slide rod 305 is fixedly connected to the top seat 306, the top seat 306 is fixedly connected to the outer side of the top plate 301, the other end of the slide rod 305 is fixedly connected with a snap ring 307, a second spring 308 is sleeved on the slide rod 305, and the two ends of the second spring 308 are respectively fixedly connected to the bottom surface of the slide seat 303 and the top surface of the snap ring 307.

[0035] Specifically, the tooth plate 208 is slidably connected to the interior of the adjusting block 3, and a one-way latch tooth 304 is arranged inside the adjusting block 3. Since a slope is arranged on one side of the one-way latch tooth 304, when the tooth plate 208 moves in one direction, the tooth plate 208 will lift the one-way latch tooth 304 without being blocked by the one-way latch tooth 304. When the one-way latch tooth 304 moves, the slide seat 303 will slide on the slide rod 305, thereby increasing the stability of the movement of the one-way latch tooth 304. The movement of the slide seat 303 will pull the second spring 308 to prevent the tooth plate 208 from retracting due to the elastic force of the first spring 206. The movement of the tooth plate 208 facilitates the shielding sleeve 2 to slide inside the slide groove 101, thereby facilitating the external gas to enter the interior of the sampling tube 1 through the air inlet 102 for sampling.

[0036] As an implementation method in this embodiment, the stretching assembly includes a piston 4 slidably connected to the inside of the sampling tube 1, a pull rod 401 is fixedly connected to the piston 4, one end of the pull rod 401 is movably inserted on the baffle 402, and the two ends of the baffle 402 are fixedly connected to the inner wall of the sampling tube 1, and a third spring 403 is sleeved on the pull rod 401, and the two ends of the third spring 403 are respectively fixedly connected to one side of the piston 4 and one side of the baffle 402, one end of the pull rod 401 is fixedly connected to a docking joint 404, and a pair of cross bars 405 are fixedly connected to the surface of the docking joint 404, and guide grooves 406 are symmetrically opened on the surface of the sampling tube 1, and the cross bar 405 extends to the outside of the sampling tube 1 through the guide grooves 406, and one end of the cross bar 405 is sleeved with an arm plate 407, and the arm plate 407 The other end is sleeved on the moving rod 409, and a moving block 410 is fixedly installed at the middle end of the moving rod 409. A pulley 411 is rotatably connected to the moving block 410, and the pulley 411 is slidably connected to the blocking rod 412. The two ends of the blocking rod 412 are respectively fixedly connected to the inner walls of the fixed disk 204 and the positioning disk 210, and an adjusting shaft 413 is fixedly connected to the moving block 410. One end of the adjusting shaft 413 is rotatably connected to a rotating sleeve 414, and a clamping rod 415 is fixedly connected to the rotating sleeve 414. A movable groove 416 is provided on the other support plate 209, and a plurality of groups of limiting grooves 417 are provided on the support plate 209. The movable groove 416 and the limiting groove 417 are connected to each other, and one end of the clamping rod 415 extends to the outside of the support plate 209 through the movable groove 416.

[0037] Specifically, when it is necessary to sample the atmosphere, the card rod 415 is pulled to drive the moving block 410 to move through the adjusting shaft 413. The movement of the moving block 410 causes the pulley 411 to slide on the blocking rod 412, thereby increasing the stability of the movement of the moving block 410. The moving block 410 is fixedly connected with a moving rod 409. One end of the moving rod 409 is sleeved with an arm plate 407. The arm plate 407 is moved by the movement of the moving block 410. The other end of the arm plate 407 is sleeved on the cross bar 412. 05, the movement of the cross bar 405 drives the docking joint 404 to move, and the docking joint 404 is fixedly connected to the pull rod 401. The movement of the docking joint 404 drives the piston 4 to slide inside the sampling tube 1 through the pull rod 401, so that the external gas enters the sampling tube 1 through the air inlet 102 for collection, and then the locking rod 415 is rotated to the inside of the limiting groove 417 to prevent the piston 4 from retracting due to the elastic force of the third spring 403 and allowing the air to escape from the air inlet 102.

[0038] The working principle of the present invention is as follows: when the shielding sleeve 2 is moved, the rotating disk 213 is rotated to rotate the gear 212, the gear 212 and the tooth plate 208 are moved, and the movement of the tooth plate 208 drives the shielding sleeve 2 to move through the docking seat 201, so that the shielding sleeve 2 slides inside the slide groove 101, and the sliding of the shielding sleeve 2 opens the air inlet 102 on the slide groove 101, so that the external gas enters the interior of the sampling tube 1 for collection;

[0039] The tooth plate 208 is slidably connected to the inside of the adjusting block 3, and a one-way latch tooth 304 is arranged inside the adjusting block 3. Since a slope is arranged on one side of the one-way latch tooth 304, when the tooth plate 208 moves in one direction, the tooth plate 208 will lift the one-way latch tooth 304 without being blocked by the one-way latch tooth 304. When the one-way latch tooth 304 moves, the slide seat 303 will slide on the slide rod 305, thereby increasing the stability of the movement of the one-way latch tooth 304. The movement of the slide seat 303 will pull the second spring 308 to prevent the tooth plate 208 from retracting due to the elastic force of the first spring 206. The movement of the tooth plate 208 facilitates the shielding sleeve 2 to slide inside the slide groove 101, thereby facilitating the external gas to enter the sampling tube 1 through the air inlet 102 for sampling.

[0040] When it is necessary to sample the atmosphere, the clamping rod 415 is pulled to drive the moving block 410 to move through the adjusting shaft 413. The movement of the moving block 410 causes the pulley 411 to slide on the blocking rod 412, thereby increasing the stability of the movement of the moving block 410. The moving block 410 is fixedly connected with a moving rod 409. One end of the moving rod 409 is sleeved with an arm plate 407. The arm plate 407 is moved by the movement of the moving block 410. The other end of the arm plate 407 is sleeved on the cross bar 405. On the upper part, the movement of the cross bar 405 drives the docking joint 404 to move, and the docking joint 404 is fixedly connected to the pull rod 401. The movement of the docking joint 404 drives the piston 4 to slide inside the sampling tube 1 through the pull rod 401, so that the external gas enters the sampling tube 1 through the air inlet 102 for collection, and then the clamping rod 415 is rotated to the inside of the limit groove 417 to prevent the piston 4 from retracting due to the elastic force of the third spring 403 and allowing the air to escape from the air inlet 102.

[0041] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sampling device for atmospheric environment detection, comprising a sampling tube (1), characterized in that: The sampling barrel (1) has a sliding groove (101) on its surface, and a plurality of groups of air inlet holes (102) are formed inside the sliding groove (101). A limiting ring (103) is fixedly connected to the surface of the sampling barrel (1), and an air outlet hole (104) is formed on the limiting ring (103). A retaining ring (105) is rotatably connected to the limiting ring (103), and an air outlet pipe (106) is fixedly connected to the retaining ring (105). The air outlet pipe (106) is communicated with the air outlet hole (104). One end of the sampling barrel (1) is threaded. The sampling tube (1) is connected to an inspection head (107), a liner ring (108) is fixedly installed inside the sampling tube (1), a pair of fixing columns (109) are fixedly connected inside the liner ring (108), a pressure ring (110) is fixedly connected to the pair of fixing columns (109), a filter tube (112) is arranged inside the liner ring (108), a slot (113) is provided on the filter tube (112), the fixing column (109) is clamped inside the slot (113), and a pull column (114) is fixedly connected to the filter tube (112); It also includes a sealing component, a limiting component and a stretching component, wherein the sealing component is arranged inside the slide groove (101) and is used to block the air inlet hole (102), the limiting component is arranged on the fixed plate (204) and is used in conjunction with the sealing component, and the stretching component is arranged inside the sampling cylinder (1) and is used to collect gas; The sealing component comprises a shielding sleeve (2) slidably connected to the inside of the slide groove (101); the outer surface of the shielding sleeve (2) is fixedly connected to a plurality of docking seats (201); the docking seat (201) is fixedly connected to a side plate (202); the other end of the side plate (202) is movably inserted into a sleeve seat (203); the sleeve seat (203) is fixedly mounted on a fixed disk (204); the fixed disk (204) is fixedly connected to the other end of the sampling cylinder (1); one end of the side plate (202) is fixedly connected to a collar (205); a first spring (206) is sleeved on the side plate (202); the two ends of the first spring (206) are respectively connected to one side of the docking seat (201) and the sleeve seat (203). One side of the shielding sleeve (2) is in contact with each other, a fixing seat (207) is fixedly connected to the surface of the shielding sleeve (2), one side of the fixing seat (207) is fixedly connected to a toothed plate (208), a pair of support plates (209) are fixedly connected to the top position of the fixing plate (204), the other ends of the pair of support plates (209) are fixedly connected to a positioning plate (210), a handle (211) is fixedly connected to the middle position of the positioning plate (210), a gear (212) is meshed on the toothed plate (208), one end of the gear (212) is fixedly connected to a rotating disk (213), the gear (212) is rotatably connected to a limiting seat (214), and the limiting seat (214) is fixedly mounted on the outer surface of one of the support plates (209); The limit assembly comprises an adjustment block (3) fixedly mounted on the outer surface of the fixed disk (204); a pair of top plates (301) are fixedly connected to the adjustment block (3); through slots (302) are provided on the pair of top plates (301); a slide seat (303) is slidably connected inside the through slots (302); a one-way latching tooth (304) is fixedly connected to the middle portion of the slide seat (303); the one-way latching tooth (304) is latched on the tooth plate (208); the slide seat ( One end of the slide bar (303) is sleeved on the slide bar (305), the top end of the slide bar (305) is fixedly connected to the top seat (306), the top seat (306) is fixedly connected to the outer side of the top plate (301), the other end of the slide bar (305) is fixedly connected to a snap ring (307), the slide bar (305) is sleeved with a second spring (308), and the two ends of the second spring (308) are respectively fixedly connected to the bottom surface of the slide seat (303) and the top surface of the snap ring (307).

2. The sampling device for atmospheric environment detection according to claim 1, characterized in that: The stretching assembly comprises a piston (4) slidably connected to the inside of the sampling cylinder (1); a pull rod (401) is fixedly connected to the piston (4); one end of the pull rod (401) is movably inserted into a baffle (402); both ends of the baffle (402) are fixedly connected to the inner wall of the sampling cylinder (1); a third spring (403) is sleeved on the pull rod (401); both ends of the third spring (403) are fixedly connected to one side of the piston (4) and one side of the baffle (402), respectively.

3. The sampling device for atmospheric environment detection according to claim 2, characterized in that: One end of the pull rod (401) is fixedly connected to a docking joint (404), a pair of cross bars (405) are fixedly connected to the surface of the docking joint (404), a guide groove (406) is symmetrically provided on the surface of the sampling tube (1), the cross bars (405) extend to the outside of the sampling tube (1) through the guide groove (406), and an arm plate (407) is sleeved on one end of the cross bars (405).

4. The sampling device for atmospheric environment detection according to claim 3, characterized in that: The other end of the arm plate (407) is sleeved on the moving rod (409), and a moving block (410) is fixedly installed at the middle end of the moving rod (409). A pulley (411) is rotatably connected to the moving block (410), and the pulley (411) is slidably connected to a blocking rod (412). The two ends of the blocking rod (412) are respectively fixedly connected to the inner walls of the fixed plate (204) and the positioning plate (210).

5. The sampling device for atmospheric environment detection according to claim 4, characterized in that: The movable block (410) is fixedly connected to an adjusting shaft (413), one end of the adjusting shaft (413) is rotatably connected to a rotating sleeve (414), and a clamping rod (415) is fixedly connected to the rotating sleeve (414), wherein another of the support plates (209) is provided with a movable groove (416), and the support plate (209) is provided with a plurality of groups of limiting grooves (417), the movable grooves (416) and the limiting grooves (417) are communicated with each other, and one end of the clamping rod (415) extends to the outside of the support plate (209) through the movable groove (416).

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