A sampling device for detecting gaseous pollutants

Abstract

The application relates to the technical field of gas sampling, and discloses a sampling device for detecting gas pollutants, which comprises a base, a connecting cylinder rotatably arranged on the base, a lifting seat slidably arranged in the connecting cylinder, a plurality of mounting seats equidistantly arranged on the lifting seat along the circumferential direction of the lifting seat, a detachable sampling assembly arranged on each mounting seat, a sampling cylinder arranged on each mounting seat, an air suction pipe I arranged on each air suction port penetrating through the inside of the sampling cylinder, an air suction pipe II arranged on the rest of the air suction ports, and a control assembly arranged on the lifting seat and used for controlling the air suction of the air suction pipe I or the air suction pipe II. The application has the advantages that the sampling device is simple in structure, convenient and fast in sampling operation of the gas in multiple directions at the same place, the number of sampling points can be adjusted according to the requirements, and the use efficiency of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas sampling, in particular to a sampling device for detecting gas pollutants. BACKGROUND

[0002] Atmospheric pollution refers to the concentration of gaseous pollutants reaching a harmful level, thereby destroying the ecological system and normal survival and development of human beings. Gas pollutant sampling is an important step in atmospheric environment monitoring, and is closely related to the reliability of monitoring data. There are mainly two methods for collecting gas pollutant samples: one is to make a large amount of air pass through a liquid absorbent or a solid adsorbent to absorb or block pollutants, thereby concentrating the originally low-concentration pollutants in the gas; and the other is to collect air containing pollutants by using a sampling cylinder.

[0003] When multiple sampling cylinders are used to sample the atmosphere in multiple directions at the same location, the existing device needs to manually connect a sealing cover to the end of the sampling cylinder for sealing operation after the sampling of the atmosphere in the sampling cylinder is completed. This operation is troublesome and affects the convenience of using the device. Moreover, the number of sampling points cannot be adaptively adjusted according to the needs during the sampling process, thereby reducing the use range of the device. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the above difficulties and provide a sampling device for detecting gas pollutants.

[0005] To solve the above technical problems, the technical solution provided by the present application is as follows: a base is provided, a connecting cylinder is rotatably arranged on the top surface of the base, a lifting seat that can slide up and down is arranged in the connecting cylinder, a plurality of mounting seats are equidistantly arranged on the lifting seat along the circumferential direction thereof, and a plurality of sampling assemblies are arranged on each mounting seat.

[0006] The sampling assembly comprises a sampling cylinder that is detachably arranged on the mounting seat, an end cover is fixedly arranged at one end of the sampling cylinder, a sealing cover is slidably arranged at the other end of the sampling cylinder, a piston rod is slidably arranged on the end cover, and a piston that cooperates with the inner wall of the sampling cylinder is arranged on the piston rod, sliding rods that slidably cooperate with the end cover are arranged at both ends of the sealing cover, a connecting seat is jointly arranged at the end of the end cover that protrudes out of the two sliding rods, a connecting assembly that fixes the connecting seat and the end cover is arranged on the connecting seat and the end cover, a return spring is wound around the sliding rod between the connecting seat and the end cover, and a push block that releases the fixation of the connecting assembly is arranged on the piston rod.

[0007] A detachable air suction pipe one is arranged on each of the mutually spaced end covers, a detachable air suction pipe two is arranged on each of the remaining end covers, and a control assembly that allows the plurality of air suction pipes one or air suction pipes two to independently or simultaneously suck air is arranged on the lifting seat.

[0008] As improvement, the control assembly comprises a control cylinder arranged on the lifting seat, a rotating shaft is arranged at either end of the control cylinder, a sealing seat is arranged on the rotating shaft and matched with the inner wall of the control cylinder, the control cylinder is divided into the suction cylinder I and the suction cylinder II under the action of the sealing seat, the other ends of the plurality of suction pipes I are connected to the suction cylinder I and communicated with the inside of the suction cylinder I, the other ends of the plurality of suction pipes II are connected to the suction cylinder II and communicated with the inside of the suction cylinder II;

[0009] The suction pipe III is arranged on the control cylinder corresponding to the sealing seat, the through holes I, the through holes II and the through holes III are arranged on the sealing seat along the circumferential direction of the sealing seat and communicated with the suction pipe III, the through hole I is a T-shaped structure and communicated with the suction cylinder I and the suction cylinder II at two ends respectively, the through holes II and the through holes III are oppositely arranged L-shaped structures and communicated with the suction cylinder I and the suction cylinder II respectively, the adjusting assembly is arranged on the lifting seat and controls the rotation of the rotating shaft I.

[0010] As improvement, the adjusting assembly comprises a worm wheel arranged on the outer side end of the rotating shaft I, the fixing seats are arranged on the lifting seat corresponding to the two ends of the worm wheel, the worm gears are rotatably arranged on the two fixing seats and engaged with the worm wheel, the end of the worm gear extending out of the fixing seat is connected to the output shaft of the motor I, and the detection assembly for controlling the rotation angle of the worm wheel is arranged on the lifting seat.

[0011] As improvement, the detection assembly comprises an L-shaped support rod arranged on the lifting seat, a disc body corresponding to the worm wheel is arranged on the support rod, three detection blocks are arranged on the outer side end face of the worm wheel along the circumferential direction of the worm wheel, a U-shaped frame is arranged on the disc body corresponding to any detection block, and a proximity switch matched with the detection block is arranged on the U-shaped frame.

[0012] As improvement, three positioning seats are arranged on the outer side face of the base along the circumferential direction of the base, the hinge seats are arranged on the base between every two positioning seats, and the detachable tripod is arranged on the three hinge seats.

[0013] As improvement, the bottom cover matched with the rotation of the base is detachably arranged on the bottom face of the connecting cylinder, the large gear is sleeved on the outer side face of the bottom cover, and the small gear engaged with the large gear is rotatably arranged on the base.

[0014] As improvement, the electric push rods are arranged at two ends of the bottom cover, and the movable ends of the two electric push rods are respectively connected to the bottom face of the lifting seat.

[0015] The beneficial effects of the present application compared with the prior art are:

[0016] 1、control a plurality of suction pipe one, suction pipe two to carry out the suction operation, can make its corresponding sampling cylinder inside form negative pressure space, at this time the external air will enter from the sampling cylinder bottom to the sampling cylinder, then the piston is lifted to move inwards, then drives the piston rod and push block to move inwards synchronously, when the piston moves inwards to contact the end cover, the push block pushes the connecting seat to adjust, so that the fixing between the connecting seat and the end cover is released, under the action of the reset spring, the sealing cover moves to the direction of the sampling cylinder bottom wall, the sampling completed sampling cylinder is automatically sealed, so that the atmosphere of the same place in multiple directions can be sampled conveniently and quickly;

[0017] 2、 through the adjustment of the control assembly, the plurality of suction pipe one, suction pipe two can carry out single or simultaneous suction operation, so that the use number of the sampling cylinder can be adaptively increased or decreased according to the demand, the use range of the device is improved;

[0018] 3、start motor one drives the worm to rotate, then drives the worm wheel and the rotating shaft one to rotate, at the same time drives the sealing seat to rotate in the control cylinder, so that the through hole one, the through hole two or the through hole three selectively communicate with the suction pipe four, so as to control the plurality of suction pipe one or suction pipe two to carry out single or simultaneous suction;

[0019] 4、under the action of the proximity switch and the detection block, the angle position of the worm wheel rotation can be effectively detected, and the angle of the sealing seat rotation can be effectively detected, so as to ensure the accuracy of the through hole one, the through hole two or the through hole three and the suction pipe three. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the structure diagram of the present application Figure One .

[0021] Figure 2 is the structure diagram of the present application Figure Two .

[0022] Figure 3 is the split structure diagram of the present application.

[0023] Figure 4 is the internal structure diagram of the present application.

[0024] Figure 5 is the cooperation diagram of the sampling cylinder and the mounting seat in the present application.

[0025] Figure 6 is the internal structure diagram of the sampling cylinder in the present application.

[0026] Figure 7 is the structure diagram of the sampling cylinder in the present application.

[0027] Figure 8 Figure 6 is a schematic diagram of the connection between the first air suction pipe and the second air suction pipe in the present application.

[0028] Figure 9 Figure 7 is a schematic diagram of the internal structure of the control cylinder in the present application.

[0029] Figure 10 Figure 8 is a schematic diagram of the structure of the sealing seat in the present application. Figure One

[0030] Figure 11 Figure 9 is a schematic diagram of the structure of the sealing seat in the present application. Figure Two

[0031] Figure 12 Figure 10 is a schematic diagram of the connection between the control cylinder and the air extractor in the present application.

[0032] Figure 13 Figure 11 is a schematic diagram of the structure of the adjusting assembly in the present application.

[0033] Figure 14 Figure 12 is an enlarged view of A in the present application. Figure 13

[0034] As shown in the figure: 1, base; 111, connecting cylinder; 112, lifting seat; 113, mounting seat; 114, through slot; 115, bottom cover; 116, electric push rod; 117, large gear; 118, second rotating shaft; 119, small gear; 120, second motor; 121, arc-shaped slot; 122, arc-shaped seat; 123, fastening screw; 124, top cover; 125, positioning seat; 126, hinged seat; 2, sampling assembly; 211, sampling cylinder; 212, end cover; 213, sliding rod; 214, sealing cover; 215, sealing block; 216, sealing ring; 217, air release plug; 218, piston rod; 219, piston; 220, connecting seat; 221, through hole; 222, return spring; 223, connecting assembly; 2231, magnetic attraction block; 2232, iron block; 224, notch; 225, push block; 226, air suction port; 227, first air suction pipe; 228, second air suction pipe; 3, control assembly; 311, control cylinder; 312, first rotating shaft; 313, sealing seat; 314, first air suction cylinder; 315, second air suction cylinder; 316, third air suction pipe; 317, through hole one; 318, through hole two; 319, through hole three; 4, adjusting assembly; 411, worm gear; 412, fixed seat; 413, worm; 414, first motor; 5, detection assembly; 511, support rod; 512, disc body; 513, detection block; 514, U-shaped frame; 515, proximity switch; 6, air extractor; 611, air suction pipe; 7, tripod. DETAILED DESCRIPTION

[0035] The present application will be further described in detail below with reference to the accompanying drawings. ​​​

[0036] Combined with appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 and attached Figure 8 As shown, a sampling device for detecting gaseous pollutants includes a base 1, a connecting cylinder 111 rotatably disposed on the top surface of the base 1, a lifting seat 112 that can slide up and down disposed inside the connecting cylinder 111, a plurality of L-shaped mounting seats 113 are equidistantly disposed on the lifting seat 112 along its circumference, a through groove 114 is provided on the connecting cylinder 111 corresponding to each mounting seat 113, and a detachable sampling component 2 is disposed on each mounting seat 113;

[0037] The sampling assembly 2 includes a detachable sampling cylinder 211 mounted on a mounting base 113. The mounting base 113 has an arc-shaped groove 121 for placing the sampling cylinder 211, and is also hinged to an arc-shaped seat 122 that mates with the arc-shaped groove 121. A fastening screw 123 passes through the arc-shaped seat 122 away from the hinge. The mounting base 113 has an internal thread that mates with the fastening screw 123. The sampling cylinder is sampled under the cooperation of the arc-shaped seat 122 and the arc-shaped groove 121. 211 is detachably connected. One end of the sampling tube 211 is fixedly provided with an end cap 212, and the other end is slidably provided with a sealing cap 214. A sealing block 215 that can extend into the sampling tube 211 and form a sealing state is fixedly provided on the sealing cap 214, and a sealing ring 216 is sleeved on the sealing block 215. A detachable vent plug 217 is provided on the sealing cap 214. The air in the sampling tube 211 after sampling can be discharged and tested through the vent plug 217.

[0038] A piston rod 218 is slidably mounted on the end cap 212, and a piston 219 is mounted on the piston rod 218 to cooperate with the inner wall of the sampling cylinder 211. Both ends of the sealing cap 214 are provided with sliding rods 213 that slidably cooperate with the end cap 212. The ends of the two sliding rods 213 extending out of the end cap 212 are provided with a connecting seat 220. A connecting assembly 223 is provided on the connecting seat 220 and the end cap 212 to fix them together. The connecting assembly 223 includes magnetic blocks 2231 disposed at both ends of the connecting seat 220. The end cap 212 is fixed... An iron block 2232 is provided to cooperate with the magnetic block 2231. With the cooperation of the magnetic block 2231 and the iron block 2232, the sealing cover 214 and the bottom of the sampling tube 211 are separated. A return spring 222 is wound on the slide rod 213 between the connecting seat 220 and the end cover 212. The connecting seat 220 is provided with a through hole 221 for the piston rod 218 to extend out. The piston rod 218 is provided with a push block 225 to release the connection assembly 223. The end cover 212 is provided with a slot 224 for the push block 225 to extend out.

[0039] Each end cover 212 is provided with an air inlet 226 communicating with the interior of the sampling cylinder 211, and a plurality of air inlets 226 are provided with detachable air pipes 227, and the remaining plurality of air inlets 226 are provided with detachable air pipes 228, and the connection of the plurality of air pipes 227 and air pipes 228 with the air inlets 226 is carried out through quick connectors, so that the sampling cylinder 211 can be conveniently connected and disconnected with the air pipes 227 and air pipes 228, and the lifting seat 112 is provided with a control assembly 3 for the plurality of air pipes 227 or air pipes 228 to perform independent or simultaneous air suction.

[0040] Through the above structure, first, the sealing cover 214 and the sampling cylinder 211 are in a separated state, then the piston 219 is moved to a position away from the end cover 212, then the plurality of sampling cylinders 211 are connected to the mounting seat 113, and then the plurality of air pipes 227 and air pipes 228 are connected to the air inlets 226, and the plurality of air pipes 227 and air pipes 228 are controlled to perform independent or simultaneous air suction operation, so that a negative pressure space is formed in the corresponding sampling cylinder 211, and because the pressure in the sampling cylinder 211 is lower than the atmospheric pressure, the external air will enter the sampling cylinder 211 from the space between the bottom wall of the sampling cylinder 211 and the sealing cover 214, then the piston 219 is lifted and moved inward, and the piston rod 218 and the push block 225 are synchronously moved inward, when the piston 219 moves inward to contact the end cover 212, the push block 225 pushes and adjusts the connecting seat 220, so that the fixing between the connecting seat 220 and the end cover 212 is released, under the action of the return spring 222, the sealing cover 214 is automatically moved to the direction of the bottom wall of the sampling cylinder 211, and the sealed operation of the sampling cylinder 211 after sampling is completed.

[0041] In combination with the drawings Figure 6 , the drawings Figure 9 , the drawings Figure 10 , the drawings Figure 11 and the drawings Figure 12 , the control assembly 3 comprises a control cylinder 311 arranged on the lifting seat 112, a rotating shaft 312 is rotatably arranged at either end of the control cylinder 311, and a sealing seat 313 cooperating with the inner wall of the control cylinder 311 is arranged on the rotating shaft 312, under the action of the sealing seat 313, the control cylinder 311 is divided into an air suction cylinder 314 and an air suction cylinder 315 independent of each other, the other ends of the plurality of air pipes 227 are connected to the air suction cylinder 314 and communicate with the interior thereof, and the other ends of the plurality of air pipes 228 are connected to the air suction cylinder 315 and communicate with the interior thereof.

[0042] The control cylinder 311 corresponding to the sealing seat 313 is provided with a suction pipe three 316 penetrating the inside thereof, the lifting seat 112 is provided with an air extractor 6, the suction port end of the air extractor 6 is provided with an air extraction pipe 611 connected with the suction pipe three 316, and the sealing seat 313 is provided with a through hole one 317, a through hole two 318 and a through hole three 319 communicating with the suction pipe three 316 along the circumferential direction thereof at equal intervals, and the through hole one 317 is a T-shaped structure penetrating the suction cylinder one 314 and the suction cylinder two 315 at two ends respectively, and the through hole two 318 and the through hole three 319 are oppositely arranged L-shaped structures penetrating the suction cylinder one 314 and the suction cylinder two 315 respectively, and the lifting seat 112 is provided with an adjusting assembly 4 controlling the rotation of the rotating shaft one 312.

[0043] The working principle of the control assembly 3 is that the rotation of the rotating shaft one 312 drives the sealing seat 313 to rotate in the control cylinder 311, so that the through hole one 317, the through hole two 318 or the through hole three 319 selectively communicates with the suction pipe three 316, and then the air extractor 6 is started, and through the cooperation of the air extraction pipe 611 and the suction pipe three 316, the multiple suction pipes one 227 and the suction pipe two 228 can be individually or simultaneously sucked, so that the number of the sampling cylinders 211 can be adjusted according to the use requirement, and the use range of the device is improved.

[0044] Combining the drawings Figure 13 and the drawings Figure 14 As shown, the adjusting assembly 4 comprises a worm wheel 411 arranged on the outer end of the rotating shaft one 312, and a fixed seat 412 is arranged on the lifting seat 112 corresponding to the two ends of the worm wheel 411, and a worm gear 413 meshing with the worm wheel 411 is rotatably arranged on the two fixed seats 412, and the end of the worm gear 413 extending out of any fixed seat 412 is connected to the output shaft of a motor one 414, and the lifting seat 112 is provided with a detection assembly 5 controlling the rotation angle of the worm wheel 411;

[0045] The detection assembly 5 comprises an L-shaped support rod 511 arranged on the lifting seat 112, and a disc body 512 corresponding to the worm wheel 411 is arranged on the support rod 511, three detection blocks 513 are arranged on the outer side end face of the worm wheel 411 along the circumferential direction thereof at equal intervals, and a U-shaped frame 514 is arranged on the disc body 512 corresponding to any detection block 513, and a proximity switch 515 cooperating with the detection block 513 is arranged on the U-shaped frame 514.

[0046] The working principle of the adjusting assembly 4 and the detecting assembly 5 is that the motor 414 is started to drive the worm 413 to rotate, and then drive the worm wheel 411 and the rotating shaft 312 engaged with the worm 413 to rotate, and simultaneously drive the sealing seat 313 to rotate and adjust. The cooperation of the worm wheel 411 and the worm 413 can not only achieve the transmission function, but also achieve a certain self-locking effect. In the process of rotating the worm wheel 411, the angle position of the worm wheel 411 can be effectively detected through the cooperation of the detecting block 513 and the proximity switch 515, and the rotating angle of the sealing seat 313 can be effectively detected, so as to ensure the accuracy of the communication between the through hole 317, the through hole 318 or the through hole 319 and the suction pipe 316.

[0047] Combining the drawings Figure 1 and the drawings Figure 2 As shown in the drawings, three positioning seats 125 are arranged equidistantly along the circumferential direction of the outer side of the base 1, and a positioning hole is formed in each positioning seat 125. A hinge seat 126 is arranged on the middle part of the base 1 between every two positioning seats 125. A detachable tripod 7 is arranged on the three hinge seats 126. In this way, the base 1 can be connected to the tripod 7 or placed on the support frame during use, thereby increasing the use flexibility of the device.

[0048] Combining the drawings Figure 3 and the drawings Figure 6 As shown in the drawings, a bottom cover 115 that is rotatably connected to the base 1 is detachably arranged on the bottom surface of the connecting cylinder 111, and a detachable top cover 124 is arranged on the top surface of the connecting cylinder 111. A large gear 117 is sleeved on the outer side of the bottom cover 115. A rotating shaft 118 is rotatably arranged on the base 1. A small gear 119 is arranged on the rotating shaft 118 and engaged with the large gear 117. The top end of the rotating shaft 118 is connected to the output shaft of a motor 120. The motor 120 is started to drive the rotating shaft 118 and the small gear 119 to rotate, and then drive the large gear 117 to rotate, so as to adjust the rotation of the bottom cover 115 and the connecting cylinder 111.

[0049] The bottom cover 115 is provided with an electric push rod 116 at both ends. The movable ends of the two electric push rods 116 are connected to the bottom surface of the lifting seat 112. The lifting seat 112 is fixedly provided with a sliding block at both ends. A sliding groove matched with the sliding block is formed in the inner wall of the connecting cylinder 111 along the axial direction. The extension and retraction of the electric push rod 116 can make the lifting seat 112 slide up and down in the connecting cylinder 111, so as to effectively adjust the height of the sampling cylinder 211.

[0050] In the specific implementation of the present application, firstly, the tripod 7 is selectively connected according to the requirements of the use site, then the sampling cylinder 211 is connected to the mounting seat 113, the rotation of the control connecting cylinder 111 is adjusted, the direction of the sampling cylinder 211 can be adaptively adjusted, finally, the air extractor 6 is started, under the action of the air extraction pipe 611 and the control assembly 3, the single or simultaneous air suction operation of the plurality of air suction pipes 227 and 228 can be performed, the negative pressure space is formed in the sampling cylinder 211 corresponding to the air suction pipes, at this time, the external air enters from the bottom of the sampling cylinder 211, and the piston 219 is pushed to move inward, the piston rod 218 and the push block 225 are driven to move inward, in the movement of the push block 225, the fixing between the connecting seat 220 and the end cover 212 is released, then under the action of the reset spring 222, the sealing cover 214 moves to the direction of the bottom wall of the sampling cylinder 211, the sealing operation of the sampling cylinder 211 after the sampling is completed is performed, so that the air at multiple directions at the same site can be conveniently and quickly sampled, and the use efficiency of the device is improved.

[0051] The above describes the present application and its implementation mode, which is not limited, and the drawings only show one of the implementation modes of the present application, and the actual structure is not limited thereto. In summary, if the ordinary skilled in the art is inspired, without departing from the purpose of the present application, without creating a similar structure mode and example of the technical solution, which should belong to the protection scope of the present application.

Claims

1. A sampling device for detecting gas pollutants, comprising a base (1), a connecting cylinder (111) rotatably arranged on the top surface of the base (1), a lifting seat (112) slidably arranged in the connecting cylinder (111), a plurality of mounting seats (113) equidistantly arranged on the circumference of the lifting seat (112), and a sampling assembly (2) arranged on each mounting seat (113), characterized in that: the sampling assembly (2) comprises a sampling cylinder (211) detachably arranged on the mounting seat (113), an end cap (212) fixedly arranged at one end of the sampling cylinder (211), a sealing cap (214) slidably arranged at the other end of the sampling cylinder (211), a piston rod (218) slidably arranged on the end cap (212) and a piston (219) arranged on the piston rod (218) and matched with the inner wall of the sampling cylinder (211), two slide rods (213) slidably arranged at both ends of the sealing cap (214) and matched with the end cap (212), a connecting seat (220) arranged at the end of the two slide rods (213) extending out of the end cap (212), a connecting assembly (223) arranged on the connecting seat (220) and the end cap (212) and used for fixing the connecting seat (220) and the end cap (212), a return spring (222) wound around the slide rods (213) between the connecting seat (220) and the end cap (212), and a push block (225) arranged on the piston rod (218) and used for releasing the fixing of the connecting assembly (223); a plurality of gas suction pipes I (227) are detachably arranged on the mutually spaced end caps (212), a plurality of gas suction pipes II (228) are detachably arranged on the remaining end caps (212), and a control assembly (3) is arranged on the lifting seat (112) and used for separately or simultaneously suctioning the plurality of gas suction pipes I (227) or the plurality of gas suction pipes II (228); the control assembly (3) comprises a control cylinder (311) arranged on the lifting seat (112), a rotating shaft I (312) rotatably arranged at either end of the control cylinder (311) and a sealing seat (313) arranged on the rotating shaft I (312) and matched with the inner wall of the control cylinder (311), the control cylinder (311) is divided into a gas suction cylinder I (314) and a gas suction cylinder II (315) by the sealing seat (313), the plurality of gas suction pipes I (227) are connected to the gas suction cylinder I (314) at the other end and penetrate the gas suction cylinder I (314), and the plurality of gas suction pipes II (228) are connected to the gas suction cylinder II (315) at the other end and penetrate the gas suction cylinder II (315). ​ Suction pipe three (316) is arranged on the control cylinder (311) corresponding to the sealing seat (313), and the sealing seat (313) is provided with through holes one (317), through holes two (318) and through holes three (319) in the circumferential direction at equal intervals, which are communicated with the suction pipe three (316), and the through hole one (317) is a T-shaped structure and is communicated with the suction cylinder one (314) and the suction cylinder two (315) at both ends, and the through hole two (318) and the through hole three (319) are oppositely arranged L-shaped structures and are communicated with the suction cylinder one (314) and the suction cylinder two (315), respectively, and the lifting seat (112) is provided with an adjusting assembly (4) for rotating the control shaft one (312).

2. The sampling device for detecting a gaseous pollutant according to claim 1, characterized in that: The adjusting assembly (4) comprises a worm wheel (411) arranged on the outer side end of the control shaft one (312), and a fixed seat (412) is arranged on the lifting seat (112) corresponding to both ends of the worm wheel (411), and the two fixed seats (412) are rotatably provided with a worm (413) engaged with the worm wheel (411), and the end of the worm (413) extending out of any fixed seat (412) is connected to the output shaft of the motor one (414), and the lifting seat (112) is provided with a detection assembly (5) for controlling the rotation angle of the worm wheel (411).

3. A sampling device for the detection of gaseous pollutants according to claim 2, characterized in that: The detection assembly (5) comprises an L-shaped support rod (511) arranged on the lifting seat (112), and a disc body (512) corresponding to the worm wheel (411) is arranged on the support rod (511), three detection blocks (513) are arranged on the outer side end face of the worm wheel (411) in the circumferential direction at equal intervals, and a U-shaped frame (514) is arranged on the disc body (512) corresponding to any detection block (513), and a proximity switch (515) is arranged on the U-shaped frame (514) for cooperation with the detection block (513).

4. The sampling device for detecting a gaseous pollutant according to claim 1, wherein: Three positioning seats (125) are arranged on the outer side face of the base (1) in the circumferential direction at equal intervals, and a hinge seat (126) is arranged on the base (1) between every two positioning seats (125), and a detachable tripod (7) is arranged on the three hinge seats (126).

5. A sampling device for the detection of gaseous pollutants according to any one of claims 1 to 4, characterized in that: A bottom cover (115) rotatably matched with the base (1) is detachably arranged on the bottom face of the connecting cylinder (111), and a large gear (117) is sleeved on the outer side face of the bottom cover (115), and a small gear (119) is rotatably arranged on the base (1) and engaged with the large gear (117).

6. A sampling device for the detection of gaseous pollutants according to claim 5, characterized in that: Two electric push rods (116) are arranged on the bottom cover (115) at both ends, and the movable ends of the two electric push rods (116) are respectively connected to the bottom face of the lifting seat (112).

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