VOCS concentration detection device

Abstract

The invention provides a VOCS concentration detection device, and relates to the technical field of VOCS concentration detection.The VOCS concentration detection device comprises a base, two shaft rings are fixed to the top of the base, a rotary drum is rotatably installed in the two shaft rings, three conveying assemblies are arranged in the rotary drum, each conveying assembly comprises an air storage pipe, a conveying pipe is installed at the bottom of the tail end of each air storage pipe, and the conveying pipes are connected with the air storage pipes. Compared with the prior art, three groups of detectors are alternately used and can be used for real-time monitoring, waste gas is collected through the conveying assembly, the concentration of VOCS in a certain amount of waste gas is detected, the detection efficiency can be improved, the waste gas is pretreated through the conveying pipe, and the detection efficiency is improved. Large-particle dust in the waste gas is prevented from entering the detector, meanwhile, under the action of the driving assembly, the dust in the waste gas is filtered and collected in the collecting box in a centralized mode, manual centralized cleaning is facilitated, and blockage in a pipeline is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of VOCS concentration detection, in particular to a VOCS concentration detection device. Background Art

[0002] VOCs, volatile organic compounds, refer to organic compounds with a saturated vapor pressure greater than 133.32 Pa at room temperature and a boiling point below 50-260°C at normal pressure, or any organic solid or liquid that can volatilize at room temperature and pressure. The general temperature and time requirements for the heating and curing process of plastic spraying and baking paint are 180-220 degrees Celsius, and the time is about 15-20 minutes. Waste gas will be generated during the process, mainly the following: volatile organic compounds non-methane total hydrocarbons, inorganic metal oxides (such as titanium dioxide, other pigments), silicon-containing organic matter (mainly leveling agents, etc.), metal organic matter, etc. Outdoors, they mainly come from industrial waste gas generated by fuel combustion and transportation, automobile exhaust, photochemical pollution, etc.; indoors, they mainly come from combustion products such as coal and natural gas, smoke from smoking, heating and cooking, emissions from construction and decoration materials, furniture, household appliances, automobile interior parts production, cleaning agents and human body itself.

[0003] Currently, the VOCs content in factory production waste gas can be detected by using existing VOCs detectors. However, for VOCs detectors, it is necessary to rely on a collector to collect the gas and send it into the detector. During the calibration process, the detector cannot monitor the VOCs content in the waste gas in real time, resulting in the interruption of the real-time monitoring process. Moreover, the calibration gas needs to be replaced manually during the calibration process, which is inconvenient to use. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a VOCS concentration detection device to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. Three groups of detectors can be used alternately for real-time monitoring. The exhaust gas is collected through the conveying component, and the VOCS concentration in a certain amount of exhaust gas is detected, which can improve the detection efficiency. The exhaust gas is pre-treated through the conveying pipe to prevent large particles of dust in the exhaust gas from entering the detector. At the same time, under the action of the driving component, the dust in the exhaust gas is filtered and collected in the collection box, which is convenient for manual centralized cleaning and avoids blockage in the pipeline.

[0005] In order to achieve the above-mentioned object, the present invention is realized by the following technical scheme: a VOCS concentration detection device, comprising a base, two groups of shaft rings are fixed on the top of the base, and a rotating drum is rotatably installed inside the two groups of shaft rings, and three groups of conveying components are arranged inside the rotating drum, and the conveying component comprises an air storage pipe, and a conveying pipe is installed at the bottom of the tail end of the air storage pipe, and a VOCS detector body is installed on the top of the other end of the conveying pipe, and a first connecting pipe is fixed at the top of the front end and the bottom of the tail end of the air storage pipe, and the first connecting pipe at the bottom of the tail end of the air storage pipe is connected to the conveying pipe, and the first connecting pipe at the front end of the air storage pipe slides along the inner wall of the sealing ring, and a driving component is arranged inside the air storage pipe and the conveying pipe, and the driving component comprises a first plug rod, and the first plug rod is inserted along the front end of the air storage pipe, and a piston plate is slidably installed inside the air storage pipe, and the first plug rod is fixedly connected to the piston plate, and a retaining ring is slidably connected inside the conveying pipe, and filter plates are fixedly installed at both ends of the retaining ring, and a second plug rod is rotatably inserted at the center of the filter plate through a bearing, and the second plug rod slides out from the tail end of the conveying pipe.

[0006] Furthermore, a gear ring is fixed on the outer surface of the rotating drum, a driving motor is fixed on one side of the base, and a gear is fixed on the output end of the driving motor, and the gear is meshingly connected with the gear ring.

[0007] Furthermore, the conveying assembly also includes a second connecting pipe, a second connecting pipe is fixed to the top of the tail end of the conveying pipe, and the second connecting pipe is fixedly connected to the VOCS detector body, a fixing frame is fixed to the top of the tail end of the gas storage tube, and the fixing frame is fixedly connected to the VOCS detector body, and the VOCS detector body is fixed on the inner wall of the rotating drum.

[0008] Furthermore, a first spring is fixed on the inner wall of the front end of the air storage tube, and the other end of the first spring is fixedly connected to the piston plate. A scraper is fixed on the outer surface of the second plug rod located on the two filter plates, and the scraper is in sliding contact with the surface of the filter plate.

[0009] Furthermore, the driving assembly also includes a connecting frame, the connecting frame is fixed to the outer ends of the first plug rod and the second plug rod, a small motor is fixed on the surface of the connecting frame corresponding to one end of the second plug rod, and the output end of the small motor is fixedly connected to the second plug rod.

[0010] Furthermore, an outer plate is fixed to the back of the small motor, an electric push rod is fixed to the top of the collar, and the extended end of the electric push rod is in compression contact with the outer plate, and a fixing block is fixed between the outer plate and the connecting frame.

[0011] Furthermore, connection boxes are fixed at both ends of the delivery pipe, a sealing plate is provided at a position of the connection box corresponding to the delivery pipe, and a second spring is fixed between the back side of the sealing plate and the inner wall of the connection box.

[0012] Furthermore, a collecting box is fixed between the three groups of connection boxes, the connection box is communicated with the collecting box, and a cover plate is installed on the outer surface of the collecting box.

[0013] Furthermore, push rods are fixed to the front and rear ends of the retaining ring symmetrically and equidistantly, and the push rods are in compression contact with the sealing plate.

[0014] Furthermore, a sealing ring is fixed at a position of the base corresponding to the front end of the three groups of air storage pipes, and an air inlet pipe is arranged on the top of the sealing ring.

[0015] Beneficial effects of the present invention:

[0016] 1. In the present invention, under the action of the driving assembly, the piston plate moves to the right along the inside of the gas storage pipe, and the baffle ring also moves to the right. Through the elastic force of the second spring, the baffle plate blocks the opening of the connecting box. After the first connecting pipe is opened, the gas enters the inside of the delivery pipe, and passes through the delivery pipe and the second connecting pipe through the filter plate to enter the inside of the VOCS detector body. In this process, large particles of impurities in the exhaust gas will be screened by the filter screen, and the surface of the filter plate is cleaned by the rotation of the scraper driven by the second plug rod, and with the movement of the baffle ring, the dust adsorbed on the inner wall of the delivery pipe is pushed to the connecting box on the other side. When the baffle ring blocks the second connecting pipe, the push rod on the other side of the baffle ring contacts the sealing plate and continues to move to push the sealing plate open. This state is repeated, and through the movement of the baffle ring and the extrusion contact between the push rod and the sealing plate, the impurities in the delivery pipe and on the surface of the filter plate are pushed to the inside of the connecting boxes on both sides, and then concentrated in the collection box, which is convenient for manual opening of the cover plate for unified cleaning, and also avoids the accumulation of more impurities in the delivery pipe to affect the gas delivery efficiency.

[0017] 2. In the present invention, when the three groups of conveying components and driving components rotate alternately to the position of the top electric push rod, the outer plate of the push plate can be moved by the extended end of the electric push rod, and the connecting frame drives the first plug rod and the second plug rod to move synchronously. The first plug rod penetrates into the air storage pipe to push the piston plate to move, and the second plug rod drives the retaining ring to move along the inside of the conveying pipe. During the process, a small motor is turned on to drive the second plug rod to rotate, so that the surface of the filter plate can be cleaned.

[0018] 3. The present invention drives the gear to rotate and mesh with the gear ring of the rotating drum through a driving motor. The rotating drum rotates along the shaft ring and can replace the positions of the three groups of conveying components. The first connecting pipe at the front end of the air storage pipe of the conveying component slides along the sealing ring. When it moves to the position of the air intake pipe, the first connecting pipe is connected to the air intake pipe, and a certain amount of exhaust gas can be injected into the air storage pipe through the air intake pipe. Then it continues to rotate and the first connecting pipe is sealed through the inner wall of the sealing ring, so as to facilitate the exhaust gas to be transferred to the conveying pipe for pretreatment.

[0019] 4. Compared with the prior art, the present invention can use three sets of detectors alternately for real-time monitoring. The exhaust gas is collected through the conveying component, and the VOCS concentration in a certain amount of exhaust gas is detected, which can improve the detection efficiency. The exhaust gas is pre-treated through the conveying pipe to prevent large particles of dust in the exhaust gas from entering the detector. At the same time, under the action of the driving component, the dust in the exhaust gas is filtered and collected in the collection box, which is convenient for manual centralized cleaning and avoids blockage in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall front structure of a VOCS concentration detection device of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall back structure of a VOCS concentration detection device of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of a drum of a VOCS concentration detection device of the present invention;

[0023] Figure 4 This is a schematic diagram of the outer surface structure of a conveying component of a VOCS concentration detection device of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of a conveying component of a VOCS concentration detection device of the present invention;

[0025] Figure 6 A schematic diagram of the connection between a delivery pipe and a connection box of a VOCS concentration detection device of the present invention;

[0026] Figure 7 The figure is a schematic diagram of the outer structure of a driving component of a VOCS concentration detection device of the present invention.

[0027] In the figure: 1. base; 11. shaft ring; 12. sealing ring; 13. air inlet pipe; 2. conveying assembly; 21. air storage pipe; 22. conveying pipe; 23. VOCS detector body; 24. fixing frame; 25. first connecting pipe; 26. piston plate; 27. first spring; 28. second connecting pipe; 29. ​​retaining ring; 210. filter plate; 211. push rod; 212. scraper; 3. driving assembly; 31. connecting frame; 32. first plug rod; 33. second plug rod; 34. electric push rod; 35. outer plate; 36. small motor; 37. fixing block; 4. driving motor; 41. gear; 42. gear ring; 5. collecting box; 51. cover plate; 52. connecting box; 53. sealing plate; 54. second spring; 6. rotating drum. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] See also Figures 1 to 7 The present invention provides a technical solution: a VOCS concentration detection device, comprising a base 1, two groups of shaft rings 11 are fixed on the top of the base 1, a rotating drum 6 is rotatably installed inside the two groups of shaft rings 11, three groups of conveying components 2 are arranged inside the rotating drum 6, the conveying component 2 comprises an air storage tube 21, a conveying tube 22 is installed at the bottom of the tail end of the air storage tube 21, a VOCS detector body 23 is installed at the top of the other end of the conveying tube 22, a first connecting tube 25 is fixed to the top and bottom of the front end of the air storage tube 21, and the first connecting tube 25 at the bottom of the tail end of the air storage tube 21 is connected to the conveying tube 22, the first connecting tube 25 at the front end of the air storage tube 21 slides along the inner wall of the sealing ring 12, a driving component 3 is arranged inside the air storage tube 21 and the conveying tube 22, the driving component 3 comprises a first plug rod 32, the first The insertion rod 32 is slidably inserted along the front end of the air storage tube 21, and a piston plate 26 is slidably installed inside the air storage tube 21, and the first insertion rod 32 is fixedly connected to the piston plate 26. A retaining ring 29 is slidably connected inside the delivery tube 22, and filter plates 210 are fixedly installed at both ends of the retaining ring 29. A second insertion rod 33 is rotatably inserted at the center of the filter plate 210 through a bearing, and the second insertion rod 33 slides out from the tail end of the delivery tube 22. When the device is used, the exhaust gas is alternately sent into the three groups of delivery components 2 through the intake pipe 13, and a quantitative exhaust gas is sent into the VOCS detector body 23 for concentration detection through the cooperation of the driving component 3 and the delivery component 2. During the detection of each group of delivery components 2, the remaining unused delivery components 2 are replaced to the top to receive the exhaust gas through the rotation of the rotating drum 6, so as to realize real-time monitoring of the exhaust gas.

[0030] In this embodiment, a gear ring 42 is fixed on the outer surface of the rotating drum 6, a driving motor 4 is fixed to one side of the base 1, and a gear 41 is fixed to the output end of the driving motor 4, the gear 41 is meshed and connected with the gear ring 42, and a sealing ring 12 is fixed to the position of the base 1 corresponding to the front end of the three groups of air storage pipes 21, and an air intake pipe 13 is arranged on the top of the sealing ring 12. The driving motor 4 is turned on to drive the gear 41 to rotate and mesh with the gear ring 42 of the rotating drum 6. The rotating drum 6 rotates along the shaft ring 11 to replace the positions of the three groups of conveying components 2, wherein the first connecting pipe 25 at the front end of the air storage pipe 21 of the conveying component 2 slides along the sealing ring 12, and when it moves to the position of the air intake pipe 13, the first connecting pipe 25 is connected with the air intake pipe 13, and a certain amount of exhaust gas can be injected into the air storage pipe 21 through the air intake pipe 13, and then it continues to rotate to seal the first connecting pipe 25 through the inner wall of the sealing ring 12, so as to facilitate the exhaust gas to be transferred to the conveying pipe 22 for pretreatment.

[0031] In this embodiment, the conveying assembly 2 further includes a second connecting pipe 28, a second connecting pipe 28 is fixed to the top of the tail end of the conveying pipe 22, and the second connecting pipe 28 is fixedly connected to the VOCS detector body 23, a fixing frame 24 is fixed to the top of the tail end of the gas storage pipe 21, and the fixing frame 24 is fixedly connected to the VOCS detector body 23, the VOCS detector body 23 is fixed to the inner wall of the rotating drum 6, a first spring 27 is fixed to the inner wall of the front end of the gas storage pipe 21, and the other end of the first spring 27 is fixedly connected to the piston plate 26, and the second plug rod 33 is fixed on the outer surface of the two filter plates 210. There is a scraper 212, and the scraper 212 is in sliding contact with the surface of the filter plate 210. The VOCS detector body 23 is a prior art, and its technical principles for detecting concentration include PID technology, electrochemical technology, FID technology, etc. The gas storage pipe 21, the delivery pipe 22 and the VOCS detector body 23 are connected as a whole through the first connecting pipe 25 and the second connecting pipe 28. The connection between the gas storage pipe 21 and the delivery pipe 22 can be isolated by the retaining ring 29 in the delivery pipe 22, which is convenient for flushing a certain amount of exhaust gas into the gas storage pipe 21, and then sent to the inside of the VOCS detector body 23 after pretreatment through the delivery pipe 22, thereby improving the reduction efficiency.

[0032] In this embodiment, the driving assembly 3 also includes a connecting frame 31, the first plug rod 32 and the second plug rod 33 are fixed with the connecting frame 31 at their outer ends, a small motor 36 is fixed on the surface of the connecting frame 31 corresponding to one end of the second plug rod 33, and the output end of the small motor 36 is fixedly connected to the second plug rod 33, an outer plate 35 is fixed on the back of the small motor 36, an electric push rod 34 is fixed on the top of the collar 11, and the extended end of the electric push rod 34 is in compression contact with the outer plate 35, and the outer plate 35 is fixedly connected to the connecting frame 31. A fixed block 37 is provided. When the three groups of conveying components 2 and driving components 3 rotate alternately to the position of the top electric push rod 34, the outer plate 35 of the push plate can be moved by the extended end of the electric push rod 34, and the connecting frame 31 drives the first plug rod 32 and the second plug rod 33 to move synchronously. The first plug rod 32 penetrates into the air storage pipe 21 to push the piston plate 26 to move, and the second plug rod 33 drives the retaining ring 29 to move along the inside of the conveying pipe 22. During the process, the small motor 36 is turned on to drive the second plug rod 33 to rotate, so that the surface of the filter plate 210 can be cleaned.

[0033] In this embodiment, the two ends of the delivery pipe 22 are fixed with connection boxes 52, the connection boxes 52 are provided with sealing plates 53 at positions corresponding to the delivery pipe 22, and a second spring 54 is fixed between the back of the sealing plate 53 and the inner wall of the connection box 52, and a collection box 5 is fixed between the three groups of connection boxes 52, the connection boxes 52 are connected to the collection boxes 5, and a cover plate 51 is installed on the outer surface of the collection box 5, and the front and rear ends of the retaining ring 29 are symmetrically fixed with a push rod 211, and the push rod 211 is symmetrically fixed with the sealing plate 53, and the second spring 54 is fixed between the back of the sealing plate 53 and the inner wall of the connection box 52, and the collection box 5 is connected to the collection box 5, and the cover plate 51 is installed on the outer surface of the collection box 5, and the push rod 211 is symmetrically fixed with the push rod 211. The plate 53 is squeezed and contacted, and the initial state in the delivery pipe 22 is that the retaining ring 29 is located at the connection position between the gas storage pipe 21 and the delivery pipe 22, and the first connecting pipe 25 is blocked, so that the quantitative exhaust gas is stored in the gas storage pipe 21. The position of the retaining ring 29 is one end of the delivery pipe 22, and the corresponding connecting box 52 baffle is pushed open by the push rod 211. Under the action of the driving component 3, the piston plate 26 moves to the right along the inside of the gas storage pipe 21, and the retaining ring 29 also moves to the right. Through the elastic force of the second spring 54, the baffle is pressed against the connecting box 52. The opening of the connection box 52 is sealed, and after the first connection pipe 25 is opened, the gas enters the inside of the delivery pipe 22, and passes through the delivery pipe 22 and the second connection pipe 28 through the filter plate 210 to enter the inside of the VOCS detector body 23. In this process, large particles of impurities in the exhaust gas will be filtered by the filter screen, and the surface of the filter plate 210 is cleaned by the rotation of the scraper 212 driven by the second plug rod 33, and the dust adsorbed on the inner wall of the delivery pipe 22 is pushed to the other side of the connection box 52 with the movement of the retaining ring 29. When the second connecting pipe 28 is blocked, the push rod 211 on the other side of the retaining ring 29 contacts the sealing plate 53 and continues to move to push the sealing plate 53 open. This state is repeated, and through the movement of the retaining ring 29 and the squeezing contact between the push rod 211 and the sealing plate 53, the impurities in the delivery pipe 22 and on the surface of the filter plate 210 are pushed to the inside of the connecting boxes 52 on both sides, and then concentrated in the collecting box 5, which is convenient for manual opening of the cover plate 51 for unified cleaning, and also avoids the accumulation of a large number of impurities in the delivery pipe 22 to affect the air delivery efficiency.

[0034] When the device is used, the driving motor 4 is turned on to drive the gear 41 to rotate and mesh with the gear ring 42 of the rotating drum 6. The rotating drum 6 rotates along the shaft ring 11, and the positions of the three groups of conveying components 2 can be replaced. The first connecting pipe 25 at the front end of the air storage pipe 21 of the conveying component 2 slides along the sealing ring 12. When it moves to the position of the air intake pipe 13, the first connecting pipe 25 is connected with the air intake pipe 13, and a certain amount of waste gas can be injected into the air storage pipe 21 through the air intake pipe 13. Then it continues to rotate, and the first connecting pipe 25 is sealed through the inner wall of the sealing ring 12, so that the waste gas is transferred to the conveying pipe 22 for pretreatment. The three groups of conveying components 2 and the driving components 3 rotate alternately to the top When the electric push rod 34 is in the right position, the outer plate 35 of the push plate can be moved by the extended end of the electric push rod 34, and the connecting frame 31 drives the first plug rod 32 and the second plug rod 33 to move synchronously. The first plug rod 32 penetrates into the gas storage pipe 21 and pushes the piston plate 26 to move. The second plug rod 33 drives the retaining ring 29 to move along the inside of the delivery pipe 22. During the process, the small motor 36 is turned on to drive the second plug rod 33 to rotate, so that the surface of the filter plate 210 can be cleaned. The initial state in the delivery pipe 22 is that the retaining ring 29 is located at the connection position between the gas storage pipe 21 and the delivery pipe 22, and the first connecting pipe 25 is blocked, so that the quantitative exhaust gas is stored in the gas storage pipe 21. The position of 29 is one end of the delivery pipe 22. The corresponding connecting box 52 baffle is pushed open by the push rod 211. Under the action of the driving assembly 3, the piston plate 26 moves to the right along the inside of the gas storage pipe 21, and the baffle ring 29 also moves to the right. Through the elastic force of the second spring 54, the baffle seals the opening of the connecting box 52. After the first connecting pipe 25 is opened, the gas enters the inside of the delivery pipe 22, and passes through the delivery pipe 22 and the second connecting pipe 28 through the filter plate 210 to enter the inside of the VOCS detector body 23. In this process, large particles of impurities in the exhaust gas will be screened by the filter screen, and the surface of the filter plate 210 is affected by the rotation of the scraper 212 driven by the second plug 33. Cleaning, and with the movement of the baffle ring 29, the dust absorbed on the inner wall of the delivery pipe 22 is pushed to the connecting box 52 on the other side. When the baffle ring 29 blocks the second connecting pipe 28, the push rod 211 on the other side of the baffle ring 29 contacts the sealing plate 53 and continues to move to push the sealing plate 53 open. This state is repeated, and through the movement of the baffle ring 29 and the extrusion contact between the push rod 211 and the sealing plate 53, the impurities in the delivery pipe 22 and on the surface of the filter plate 210 are pushed to the inside of the connecting boxes 52 on both sides, and then collected in the collecting box 5, which is convenient for manual opening of the cover plate 51 for unified cleaning, and also avoids the accumulation of a large number of impurities in the delivery pipe 22 to affect the air delivery efficiency.

[0035] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A VOCS concentration detection device, comprising a base (1), characterized in that: Two groups of shaft rings (11) are fixed on the top of the base (1), and a rotating drum (6) is rotatably installed inside the two groups of shaft rings (11). Three groups of conveying components (2) are arranged inside the rotating drum (6), and the conveying components (2) include an air storage pipe (21), a conveying pipe (22) is installed at the bottom of the tail end of the air storage pipe (21), and a VOCS detector body (23) is installed at the top of the other end of the conveying pipe (22). A first connecting pipe (25) is fixed at the top of the front end and the bottom of the tail end of the air storage pipe (21), and the first connecting pipe (25) at the bottom of the tail end of the air storage pipe (21) is connected to the conveying pipe (22). The first connecting pipe (25) at the front end of the air storage pipe (21) is connected to the conveying pipe (22) along the sealing ring ( 12) inner wall slides, a driving assembly (3) is provided inside the air storage tube (21) and the delivery tube (22), and the driving assembly (3) includes a first plug rod (32), the first plug rod (32) is inserted along the front end of the air storage tube (21) for sliding, a piston plate (26) is slidably installed inside the air storage tube (21), and the first plug rod (32) is fixedly connected to the piston plate (26), a retaining ring (29) is slidably connected inside the delivery tube (22), filter plates (210) are fixedly installed at both ends of the retaining ring (29), a second plug rod (33) is rotatably inserted at the center of the filter plate (210) through a bearing, and the second plug rod (33) slides out from the tail end of the delivery tube (22).

2. A VOCS concentration detection device according to claim 1, characterized in that: A gear ring (42) is fixed on the outer surface of the rotating drum (6), a driving motor (4) is fixed on one side of the base (1), and a gear (41) is fixed on the output end of the driving motor (4), and the gear (41) is meshingly connected with the gear ring (42).

3. A VOCS concentration detection device according to claim 1, characterized in that: The conveying assembly (2) further comprises a second connecting pipe (28), the top of the tail end of the conveying pipe (22) is fixed with the second connecting pipe (28), and the second connecting pipe (28) is fixedly connected to the VOCS detector body (23), the top of the tail end of the gas storage pipe (21) is fixed with a fixing frame (24), and the fixing frame (24) is fixedly connected to the VOCS detector body (23), and the VOCS detector body (23) is fixed on the inner wall of the rotating drum (6).

4. A VOCS concentration detection device according to claim 3, characterized in that: A first spring (27) is fixed on the inner wall of the front end of the gas storage tube (21), and the other end of the first spring (27) is fixedly connected to the piston plate (26). A scraper (212) is fixed on the outer surface of the two filter plates (210) of the second insertion rod (33), and the scraper (212) is in sliding contact with the surface of the filter plate (210).

5. A VOCS concentration detection device according to claim 1, characterized in that: The driving assembly (3) further comprises a connecting frame (31), the connecting frame (31) being fixed to the outer ends of the first plug rod (32) and the second plug rod (33), a small motor (36) being fixed to the surface of the connecting frame (31) corresponding to one end of the second plug rod (33), and an output end of the small motor (36) being fixedly connected to the second plug rod (33).

6. A VOCS concentration detection device according to claim 5, characterized in that: An outer plate (35) is fixed to the back of the small motor (36), an electric push rod (34) is fixed to the top of the collar (11), and the extended end of the electric push rod (34) is in compression contact with the outer plate (35), and a fixing block (37) is fixed between the outer plate (35) and the connecting frame (31).

7. A VOCS concentration detection device according to claim 1, characterized in that: A connection box (52) is fixed at both ends of the delivery pipe (22), a sealing plate (53) is provided at a position of the connection box (52) corresponding to the delivery pipe (22), and a second spring (54) is fixed between the back side of the sealing plate (53) and the inner wall of the connection box (52).

8. A VOCS concentration detection device according to claim 7, characterized in that: A collection box (5) is fixed between the three groups of connection boxes (52); the connection box (52) is connected to the collection box (5), and a cover plate (51) is installed on the outer surface of the collection box (5).

9. A VOCS concentration detection device according to claim 8, characterized in that: Push rods (211) are fixed symmetrically and equidistantly at the front and rear ends of the retaining ring (29), and the push rods (211) are in compression contact with the sealing plate (53).

10. A VOCS concentration detection device according to claim 1, characterized in that: A sealing ring (12) is fixed to the base (1) at a position corresponding to the front end of the three groups of air storage pipes (21), and an air inlet pipe (13) is arranged on the top of the sealing ring (12).

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