Online waste gas monitoring device adopting multi-channel sampling and transmission method thereof

Abstract

The invention discloses an online waste gas monitoring device adopting multi-channel sampling and a transmission method thereof, and relates to the field of waste gas monitoring. According to the waste gas online monitoring device adopting multichannel sampling, a sampling module comprises a support, a sampling assembly, a deflection unit and a rotating unit, the support comprises a fixed sleeve and a movable sleeve, the sampling assembly is used for collecting gas, and the deflection unit is used for driving the sampling assembly to deflect at a vertical angle; the rotating unit is used for driving the sampling assembly to rotate at a horizontal angle, and the sampling assembly, the deflection unit, the rotating unit and the gas analysis module are connected with a processor. According to the waste gas on-line monitoring device adopting multichannel sampling, through a three-time verification detection mechanism, gas collection at the initial position, the position deflected by 45 degrees and the position deflected by 90 degrees is carried out on the sampling assembly, instantaneous interference such as wind direction sudden change is eliminated through three-time detection logic, alarm is confirmed only after three-time standard exceeding, and the false alarm rate is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas monitoring, and in particular to an online waste gas monitoring device using multi-channel sampling and a transmission method thereof. Background Art

[0002] When conducting online exhaust gas monitoring in a larger area, a multi-channel VOCs online monitoring system with a sampling module is often used. The multi-channel VOCs online monitoring system is an intelligent environmental monitoring device that integrates gas sampling, analysis, data transmission and monitoring. It is mainly used for real-time and continuous monitoring of the concentration of volatile organic compounds (VOCs) in the air.

[0003] It is equipped with a sampling module, a preprocessing module, a gas analysis module and a data transmission and monitoring platform: it can collect gas samples from multiple monitoring points, analyze them, and upload the data to the cloud platform or the environmental protection department's supervision system.

[0004] However, the current sampling modules have the problem of fixed sampling positions and inconvenient angle adjustment, which leads to the following limitations: Sampling bias: When the emission source location or wind direction changes, the fixed sampling port cannot capture the actual exhaust gas concentration and the data is poorly representative.

[0005] False alarm risk: Single sampling results are easily affected by local concentration fluctuations (such as equipment leakage, instantaneous emissions), which can easily trigger false alarms.

[0006] Low efficiency: Manual adjustment of sampling ports requires downtime, which increases operation and maintenance costs and makes it difficult to cover emission sources in multiple directions.

[0007] Existing technologies rely on manual calibration or mechanical fixed brackets and are unable to dynamically respond to complex working conditions (such as unorganized emissions from chemical plants), making it difficult to meet increasingly stringent environmental regulatory requirements. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention provides an online exhaust gas monitoring device using multi-channel sampling, which solves the problems of fixed sampling position and inconvenient angle adjustment in current sampling modules, which easily lead to sampling deviation, false alarm risk and low efficiency.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: an online exhaust gas monitoring device using multi-channel sampling, including an optional sampling module, a pretreatment module and a gas analysis module, the sampling module is responsible for collecting gas samples from the monitoring point, using the pretreatment module to pretreat the gas, and converting the VOCs concentration into an electrical signal through the gas analysis module, and uploading the electrical signal to the monitoring platform, the adoption module includes: A support comprising: A fixed sleeve, which is fixedly installed at the monitoring point; A movable sleeve, which is installed above the fixed sleeve; A sampling assembly, which is installed on the top of the movable sleeve, and is used for collecting gas; A deflection unit, which is installed on the outside of the movable sleeve, and is used to drive the sampling assembly to deflect at a vertical angle; A rotating unit, which is installed at the connection between the fixed sleeve and the movable sleeve, and is used to drive the sampling assembly to rotate at a horizontal angle; The sampling component, the deflection unit, the rotation unit and the gas analysis module are connected to a processor, and the processor controls the deflection unit and the rotation unit to work according to the VOCs concentration of the gas collected by the sampling component.

[0010] Preferably, the movable sleeve comprises: A fixed section, which is rotatably disposed on top of the fixed sleeve; A deflection section, which is disposed above the fixed section and connected to the sampling assembly; The bellows section is fixedly installed between the fixed section and the deflection section.

[0011] Preferably, the sampling assembly comprises: A protective cover is fixedly mounted on the top of the deflection section, and a plurality of air holes communicating with the interior can be optionally provided below the protective cover; A sampling head, which is installed inside the protective cover; The gas delivery pipeline is fixedly installed at the bottom of the sampling head, and the gas delivery pipeline extends toward the inside of the bracket.

[0012] Preferably, the gas transmission pipeline comprises: A fixed pipeline is located inside the fixed sleeve, and the bottom end of the fixed pipeline extends outward and is connected to the pretreatment module; A movable pipeline, which is located inside the movable sleeve; A sealing joint, which is fixedly installed on the top of the fixed pipeline; A sealing ring, which is fixedly mounted on the bottom end of the movable pipeline and rotatably connected to the inner wall of the sealing joint; The fixing clamp is fixedly arranged between the outer side of the movable pipeline and the inner wall of the movable sleeve.

[0013] Preferably, the deflection unit comprises: An electric push rod, which is fixedly installed on the outside of the fixed section; A fixing shell, two fixing shells are symmetrically installed at the front and rear of the fixing section; A driving rack is vertically slidably arranged on the inner wall of the fixed shell and is transmission-connected to the electric push rod. The top end of the driving rack passes through the top of the fixed shell and extends upward and is fixedly connected to a sealing block, and the sealing block abuts against the top of the fixed shell. A transmission gear is rotatably disposed on the inner wall of the fixed housing, and the transmission gear is meshedly connected with the driving rack; A rotating shaft, which is rotatably arranged on the inner wall of the fixed shell and fixedly plugged on the inner wall of the transmission gear, and an end of the rotating shaft passes through the outer wall of the fixed shell and extends outward; The rotating arm is rotatably arranged outside the fixed shell, the bottom end of the rotating arm is fixedly connected to the end of the rotating shaft outside, and the top end of the rotating arm is connected to the deflection section.

[0014] Preferably, a lifting rod is fixedly mounted on the output end of the electric push rod, a sliding groove is provided on the outer side of the fixed shell, and the end of the lifting rod passes through the sliding groove and is fixedly connected to the bottom end of the driving rack.

[0015] Preferably, a connecting frame is fixedly connected to the top end of the rotating arm, and the connecting frame is fixedly connected to the deflection section, a fixed arm is fixedly connected to the outer side of the fixed shell, and the other end of the fixed arm is fixedly connected to the fixed section.

[0016] Preferably, the rotating unit comprises: A connecting tube, which is fixedly mounted on the top end of the fixed sleeve; A rotating cylinder is fixedly connected to the bottom end of the fixed section, and the rotating cylinder is rotatably connected to the inner wall of the connecting cylinder; A transmission box, which is fixedly mounted on the outside of the connecting tube; The driving motor is fixedly installed on the outer side of the fixed sleeve, and the output end of the driving motor is drivingly connected to the rotating cylinder.

[0017] Preferably, a transmission gear ring is embedded in the outer ring surface of the rotating cylinder, a driving gear is rotatably connected inside the transmission box, the driving gear is meshed with the transmission gear ring, and the output end of the driving motor extends toward the inside of the transmission box and is fixedly connected to the inner wall of the driving gear.

[0018] A transmission method for an exhaust gas online monitoring device using multi-channel sampling, the transmission method comprising the following steps: Step 1: The sampling component samples the exhaust gas, and the exhaust gas is processed by the pre-processing unit and then analyzed by the gas analysis module; Step 2: First detect whether the VOCs concentration is within the threshold. If the VOCs concentration is within the threshold, repeat step 1. If the VOCs concentration is greater than the upper threshold, start the deflection unit, deflect the movable sleeve and the sampling component on the top of the movable sleeve by 45°, and start the rotation unit to drive the movable sleeve and the sampling component on the top of the movable sleeve to rotate, and then perform exhaust gas sampling; Step 3: Detect for the second time whether the VOCs concentration is within the threshold. When the VOCs concentration is within the threshold, start the deflection unit to reset, stop the rotation unit, and use the gas analysis module to send data to the monitoring platform. When the VOCs concentration is greater than the upper threshold, start the deflection unit, deflect the movable sleeve and the sampling component on the top of the movable sleeve by 90°, and start the rotation unit to drive the movable sleeve and the sampling component on the top of the movable sleeve to rotate, and then perform exhaust gas sampling; Step 4: Check for the third time whether the VOCs concentration is within the threshold. When the VOCs concentration is within the threshold, start the deflection unit to reset, stop the rotation unit, and use the gas analysis module to send data to the monitoring platform. When the VOCs concentration is still greater than the upper threshold, use the gas analysis module to send data to the monitoring platform and send a VOCs concentration exceeding the standard signal. At the same time, start the deflection unit to reset and stop the rotation unit.

[0019] The present invention discloses an exhaust gas online monitoring device using multi-channel sampling and a transmission method thereof, which has the following beneficial effects: The online exhaust gas monitoring device adopts multi-channel sampling. The sampling component is used to collect gas, the deflection unit is used to drive the sampling component to deflect at a vertical angle, and the rotation unit is used to drive the sampling component to rotate at a horizontal angle. The processor can control the deflection unit and the rotation unit to work according to the VOCs concentration of the gas collected by the sampling component. Through the three-time verification and detection mechanism, the sampling component is respectively subjected to gas collection at the initial position, the 45° deflection position, and the 90° deflection position. The three-time detection logic eliminates instantaneous interference such as sudden change in wind direction, and confirms the alarm only after three times of exceeding the standard, which greatly reduces the false alarm rate.

[0020] During use, when the electric push rod is turned on, the output end of the exhaust gas online monitoring device using multi-channel sampling can push the driving rack to move vertically. Since the transmission gear is meshed and connected with the driving rack, the transmission gear is driven to rotate. At the same time, the transmission gear is fixedly connected to the rotating arm through the rotating shaft, so that the rotating arm can be flipped accordingly. The top of the rotating arm is connected to the deflection section, so that the deflection section can be deflected accordingly, so that the sampling component at the top of the deflection section can move accordingly, so that the sampling component can achieve vertical angle deflection adjustment.

[0021] The exhaust gas online monitoring device using multi-channel sampling can drive the driving gear to rotate at its output end when the driving motor is working. Since the driving gear is meshed and connected with the transmission gear ring, the rotating cylinder can rotate accordingly, and then the fixed section on the top of the rotating cylinder can rotate accordingly, so that the sampling component can be rotated at a horizontal angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural diagram between the sampling module and the gas analysis module of the present invention; Figure 3 It is a schematic diagram of the overall process of the transmission method of the present invention; Figure 4 It is a structural schematic diagram of the sampling module of the present invention; Figure 5 It is a schematic diagram of the structure of the bracket, the deflection unit and the rotation unit of the present invention; Figure 6 It is a schematic diagram of the structure of the sampling assembly of the present invention; Figure 7 is a schematic structural diagram of a deflection unit of the present invention; Figure 8 It is a partial structural schematic diagram of the deflection unit of the present invention; Fig. 9 It is a structural schematic diagram of the rotating unit of the present invention; Fig.10 It is a vertical structural cross-sectional view of the rotating unit of the present invention; Fig.11 It is a cross-sectional view of the lateral structure of the rotating unit of the present invention.

[0024] In the figure: 1, bracket; 11, fixed sleeve; 12, movable sleeve; 121, fixed section; 122, deflection section; 123, bellows section; 2, sampling assembly; 21, protective cover; 211, air vent; 22, sampling head; 23, gas pipeline; 231, fixed pipeline; 232, movable pipeline; 233, sealing joint; 234, sealing ring; 235, fixing clamp; 3, deflection unit; 31, electric push rod; 311, lifting rod; 32, fixed shell; 321, slide groove; 33, driving rack; 331, sealing block; 34, transmission gear; 35, rotating shaft; 36, rotating arm; 361, connecting frame; 37, fixed arm; 4, rotating unit; 41, connecting cylinder; 42, rotating cylinder; 43, transmission box; 44, driving motor; 45, driving gear ring; 46, driving gear. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The embodiment of the present application provides an online exhaust gas monitoring device and a transmission method using multi-channel sampling, which solves the problems of fixed sampling position and inconvenient angle adjustment in current sampling modules, which easily lead to sampling deviation, false alarm risk and low efficiency. The sampling component 2 is used for gas collection, the deflection unit 3 is used to drive the sampling component 2 to deflect at a vertical angle, and the rotation unit 4 is used to drive the sampling component 2 to rotate at a horizontal angle. The processor can control the deflection unit 3 and the rotation unit 4 to work according to the VOCs concentration of the gas collected by the sampling component 2. Through the three-time verification and detection mechanism, the sampling component 2 is respectively subjected to gas collection at the initial position, the 45° deflection position and the 90° deflection position. The three-time detection logic eliminates instantaneous interference such as sudden change in wind direction, and confirms the alarm only after three times of exceeding the standard, which greatly reduces the false alarm rate.

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The embodiment of the present invention discloses an online exhaust gas monitoring device using multi-channel sampling and a transmission method thereof.

[0029] According to the attached Figure 1-11As shown, an online exhaust gas monitoring device using multi-channel sampling includes an optional sampling module, a pretreatment module and a gas analysis module. The sampling module is responsible for collecting gas samples from the monitoring point, pre-treating the gas using the pretreatment module, converting the VOCs concentration into an electrical signal through the gas analysis module, and uploading the electrical signal to the monitoring platform. The modules include: A support 1, comprising: A fixed sleeve 11, which is fixedly installed at the monitoring point; A movable sleeve 12, which is installed above the fixed sleeve 11; A sampling assembly 2, which is installed on the top of the movable sleeve 12, and the sampling assembly 2 is used for collecting gas; A deflection unit 3, which is installed on the outside of the movable sleeve 12, and is used to drive the sampling assembly 2 to deflect at a vertical angle; The rotating unit 4 is installed at the connection between the fixed sleeve 11 and the movable sleeve 12, and the rotating unit 4 is used to drive the sampling assembly 2 to rotate at a horizontal angle; The sampling component 2 , the deflection unit 3 , the rotation unit 4 and the gas analysis module are connected to a processor, and the processor controls the deflection unit 3 and the rotation unit 4 to work according to the VOCs concentration of the gas collected by the sampling component 2 .

[0030] The sampling component 2 is used for collecting gas, the deflection unit 3 is used for driving the sampling component 2 to deflect at a vertical angle, and the rotation unit 4 is used for driving the sampling component 2 to rotate at a horizontal angle. The processor can control the deflection unit 3 and the rotation unit 4 to work according to the VOCs concentration of the gas collected by the sampling component 2. Through the three-time verification and detection mechanism, the sampling component 2 is respectively subjected to gas collection at the initial position, the 45° deflection position and the 90° deflection position. The three-time detection logic eliminates instantaneous interference such as sudden change in wind direction, and confirms the alarm only after three times of exceeding the standard, which greatly reduces the false alarm rate.

[0031] Particularly disclosed, the movable sleeve 12 comprises: A fixed section 121, which is rotatably arranged on the top of the fixed sleeve 11; The deflection section 122 is disposed above the fixed section 121 and connected to the sampling assembly 2; The bellows section 123 is fixedly installed between the fixed section 121 and the deflecting section 122 .

[0032] The fixed section 121 and the deflection section 122 are connected by the bellows section 123 , which can protect the fixed section 121 and the deflection section 122 on the one hand, and enable the deflection section 122 to rotate relative to the fixed section 121 on the other hand.

[0033] In particular, the sampling assembly 2 comprises: The protective cover 21 is fixedly mounted on the top of the deflection section 122, and a plurality of air holes 211 communicating with the interior can be optionally opened below the protective cover 21; A sampling head 22, which is installed inside the protective cover 21; The gas delivery pipeline 23 is fixedly installed at the bottom of the sampling head 22 , and the gas delivery pipeline 23 extends toward the inside of the bracket 1 .

[0034] By utilizing the protective cover 21 , the sampling head 22 is located inside the protective cover 21 , thereby protecting the sampling head 22 . Meanwhile, by utilizing the plurality of air holes 211 below the protective cover 21 , the normal operation of the sampling head 22 is not affected.

[0035] Specifically disclosed, the gas transmission pipeline 23 comprises: A fixed pipeline 231, which is located inside the fixed sleeve 11, and the bottom end of the fixed pipeline 231 extends outward and is connected to the pre-processing module; A movable pipeline 232, which is located inside the movable sleeve 12; A sealing joint 233, which is fixedly mounted on the top of the fixed pipeline 231; A sealing ring 234, which is fixedly mounted on the bottom end of the movable pipeline 232, and the sealing ring 234 is rotatably connected to the inner wall of the sealing joint 233; The fixing clamp 235 is fixedly disposed between the outer side of the movable pipeline 232 and the inner wall of the movable sleeve 12 .

[0036] During use, a sealing joint 233 is set at the top of the fixed pipeline 231, and a sealing ring 234 is set at the bottom of the movable pipeline 232. Therefore, when the movable sleeve 12 rotates, it can drive the movable pipeline 232 inside it to rotate relative to the fixed pipeline 231. Under the action of the sealing joint 233 and the sealing ring 234, the connection between the movable pipeline 232 and the fixed pipeline 231 can be sealed.

[0037] In particular, the deflection unit 3 comprises: The electric push rod 31 is fixedly mounted on the outer side of the fixed section 121; A fixing shell 32, wherein two fixing shells 32 are symmetrically installed at the front and rear of the fixing section 121; The driving rack 33 is vertically slidably disposed on the inner wall of the fixed shell 32 and is transmission-connected to the electric push rod 31. The top end of the driving rack 33 passes through the top of the fixed shell 32, extends upward and is fixedly connected to a sealing block 331, and the sealing block 331 abuts against the top of the fixed shell 32. A transmission gear 34 is rotatably disposed on the inner wall of the fixed housing 32, and the transmission gear 34 is meshedly connected with the driving rack 33; A rotating shaft 35 is rotatably disposed on the inner wall of the fixed shell 32 and fixedly plugged into the inner wall of the transmission gear 34. The end of the rotating shaft 35 passes through the outer wall of the fixed shell 32 and extends outward. The rotating arm 36 is rotatably disposed outside the fixed shell 32 , the bottom end of the rotating arm 36 is fixedly connected to the end of the rotating shaft 35 located outside, and the top end of the rotating arm 36 is connected to the deflection section 122 .

[0038] During use, when the electric push rod 31 is turned on, its output end can push the driving rack 33 to move vertically. Since the transmission gear 34 is meshed and connected with the driving rack 33, the transmission gear 34 is driven to rotate. At the same time, the transmission gear 34 is fixedly connected to the rotating arm 36 through the rotating shaft 35, so that the rotating arm 36 can be flipped accordingly, and the top of the rotating arm 36 is connected to the deflection section 122, so that the deflection section 122 can be deflected accordingly, so that the sampling component 2 at the top of the deflection section 122 can move accordingly, so that the sampling component 2 can achieve vertical angle deflection adjustment.

[0039] Furthermore, a lifting rod 311 is fixedly mounted on the output end of the electric push rod 31 , a slide groove 321 is provided on the outer side of the fixed shell 32 , and the end of the lifting rod 311 passes through the slide groove 321 and is fixedly connected to the bottom end of the driving rack 33 .

[0040] By using the provided lifting rod 311, the end of the lifting rod 311 passes through the slide slot 321 and is fixedly connected to the bottom end of the driving rack 33, so that the lifting rod 311 can drive the driving rack 33 to move along with it when moving vertically.

[0041] Furthermore, a connecting frame 361 is fixedly connected to the top of the rotating arm 36 , and the connecting frame 361 is fixedly connected to the deflection section 122 . A fixed arm 37 is fixedly connected to the outer side of the fixed shell 32 , and the other end of the fixed arm 37 is fixedly connected to the fixed section 121 .

[0042] The connecting frame 361 is used to stably connect the top end of the rotating arm 36 and the deflection section 122 , and the fixing arm 37 is used to effectively support the fixing section 121 .

[0043] Particularly disclosed, the rotating unit 4 comprises: A connecting tube 41, which is fixedly mounted on the top of the fixed sleeve 11; The rotating cylinder 42 is fixedly connected to the bottom end of the fixed section 121, and the rotating cylinder 42 is rotatably connected to the inner wall of the connecting cylinder 41; A transmission box 43, which is fixedly mounted on the outer side of the connecting tube 41; The driving motor 44 is fixedly mounted on the outer side of the fixed sleeve 11 , and the output end of the driving motor 44 is drivingly connected to the rotating cylinder 42 .

[0044] Furthermore, a transmission gear ring 45 is embedded in the outer ring surface of the rotating cylinder 42, and a driving gear 46 is rotatably connected inside the transmission box 43. The driving gear 46 is meshedly connected to the transmission gear ring 45, and the output end of the driving motor 44 extends toward the inside of the transmission box 43 and is fixedly connected to the inner wall of the driving gear 46.

[0045] When the driving motor 44 is working, its output end can drive the driving gear 46 to rotate. Since the driving gear 46 is meshed and connected with the transmission gear ring 45, the rotating cylinder 42 can be rotated accordingly, and then the fixed section 121 on the top of the rotating cylinder 42 can be rotated accordingly, so that the sampling component 2 can be rotated at a horizontal angle.

[0046] A transmission method for an exhaust gas online monitoring device using multi-channel sampling, the transmission method comprising the following steps: Step 1: The sampling component 2 samples the exhaust gas, and the exhaust gas is processed by the pre-processing unit and then analyzed by the gas analysis module; Step 2: First detect whether the VOCs concentration is within the threshold. If the VOCs concentration is within the threshold, repeat step 1. If the VOCs concentration is greater than the upper threshold, start the deflection unit 3 to deflect the movable sleeve 12 and the sampling assembly 2 on the top of the movable sleeve 12 by 45°, and start the rotation unit 4 to drive the movable sleeve 12 and the sampling assembly 2 on the top of the movable sleeve 12 to rotate, and then perform exhaust gas sampling. Step 3: Detect for the second time whether the VOCs concentration is within the threshold value. When the VOCs concentration is within the threshold value, start the deflection unit 3 to reset, stop the rotation unit 4, and use the gas analysis module to send data to the monitoring platform. When the VOCs concentration is greater than the upper threshold value, start the deflection unit 3, deflect the movable sleeve 12 and the sampling component 2 on the top of the movable sleeve 12 by 90°, and start the rotation unit 4 to drive the movable sleeve 12 and the sampling component 2 on the top of the movable sleeve 12 to rotate, and then perform exhaust gas sampling; Step 4: Check for the third time whether the VOCs concentration is within the threshold. When the VOCs concentration is within the threshold, start the deflection unit 3 to reset, stop the rotation unit 4, and use the gas analysis module to send data to the monitoring platform. When the VOCs concentration is still greater than the upper threshold, use the gas analysis module to send data to the monitoring platform and send a VOCs concentration exceeding the standard signal. At the same time, start the deflection unit 3 to reset, and stop the rotation unit 4.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An online exhaust gas monitoring device using multi-channel sampling, including an optional sampling module, a pretreatment module and a gas analysis module. The sampling module is responsible for collecting gas samples from the monitoring point, pre-treating the gas using the pretreatment module, converting the VOCs concentration into an electrical signal through the gas analysis module, and uploading the electrical signal to the monitoring platform, characterized in that: The adoption module comprises: A support (1) comprising: A fixed sleeve (11) which is fixedly installed at the monitoring point; A movable sleeve (12) mounted above the fixed sleeve (11); A sampling assembly (2) mounted on the top of the movable sleeve (12), the sampling assembly (2) being used for collecting gas; A deflection unit (3) mounted on the outside of the movable sleeve (12), the deflection unit (3) being used to drive the sampling assembly (2) to deflect at a vertical angle; A rotating unit (4) is installed at the connection between the fixed sleeve (11) and the movable sleeve (12), and the rotating unit (4) is used to drive the sampling assembly (2) to rotate at a horizontal angle; The sampling component (2), the deflection unit (3), the rotation unit (4) and the gas analysis module are connected to a processor, and the processor controls the deflection unit (3) and the rotation unit (4) to operate according to the VOCs concentration of the gas collected by the sampling component (2).

2. The exhaust gas online monitoring device using multi-channel sampling according to claim 1 is characterized in that: The movable sleeve (12) comprises: A fixed section (121) rotatably disposed on the top of the fixed sleeve (11); A deflection section (122), which is arranged above the fixed section (121) and connected to the sampling assembly (2); The bellows section (123) is fixedly installed between the fixed section (121) and the deflection section (122).

3. The exhaust gas online monitoring device using multi-channel sampling according to claim 1 is characterized in that: The sampling component (2) comprises: A protective cover (21) fixedly mounted on the top of the deflection section (122), and a plurality of air holes (211) communicating with the interior can be optionally provided below the protective cover (21); A sampling head (22) installed inside the protective cover (21); The gas delivery pipeline (23) is fixedly mounted on the bottom of the sampling head (22), and the gas delivery pipeline (23) extends toward the interior of the bracket (1).

4. The exhaust gas online monitoring device using multi-channel sampling according to claim 3 is characterized in that: The gas transmission pipeline (23) comprises: A fixed pipeline (231), which is located inside the fixed sleeve (11), and the bottom end of the fixed pipeline (231) extends outward and is connected to the pre-processing module; A movable pipeline (232) located inside the movable sleeve (12); A sealing joint (233) fixedly mounted on the top of the fixed pipeline (231); A sealing ring (234) is fixedly mounted on the bottom end of the movable pipeline (232), and the sealing ring (234) is rotatably connected to the inner wall of the sealing joint (233); A fixing clamp (235) is fixedly disposed between the outer side of the movable pipeline (232) and the inner wall of the movable sleeve (12).

5. The exhaust gas online monitoring device using multi-channel sampling according to claim 2 is characterized in that: The deflection unit (3) comprises: An electric push rod (31) fixedly mounted on the outside of the fixed section (121); A fixing shell (32), wherein two fixing shells (32) are symmetrically mounted at the front and rear of the fixing section (121); A driving rack (33) is vertically slidably disposed on the inner wall of the fixed shell (32) and is transmission-connected to the electric push rod (31); the top end of the driving rack (33) passes through the top of the fixed shell (32), extends upward, and is fixedly connected to a sealing block (331), and the sealing block (331) abuts against the top of the fixed shell (32); A transmission gear (34) is rotatably disposed on the inner wall of the fixed housing (32), and the transmission gear (34) is meshingly connected with the driving rack (33); A rotating shaft (35) is rotatably disposed on the inner wall of the fixed shell (32) and fixedly plugged into the inner wall of the transmission gear (34), and an end of the rotating shaft (35) passes through the outer wall of the fixed shell (32) and extends outward; A rotating arm (36) is rotatably arranged outside the fixed shell (32), the bottom end of the rotating arm (36) is fixedly connected to the end of the rotating shaft (35) located outside, and the top end of the rotating arm (36) is connected to the deflection section (122).

6. The exhaust gas online monitoring device using multi-channel sampling according to claim 5 is characterized in that: A lifting rod (311) is fixedly mounted on the output end of the electric push rod (31), a sliding groove (321) is provided on the outer side of the fixed shell (32), and an end of the lifting rod (311) passes through the sliding groove (321) and is fixedly connected to the bottom end of the driving rack (33).

7. The exhaust gas online monitoring device using multi-channel sampling according to claim 5 is characterized in that: The top end of the rotating arm (36) is fixedly connected to a connecting frame (361), and the connecting frame (361) is fixedly connected to the deflection section (122); the outer side of the fixed shell (32) is fixedly connected to a fixed arm (37), and the other end of the fixed arm (37) is fixedly connected to the fixed section (121).

8. The exhaust gas online monitoring device using multi-channel sampling according to claim 2 is characterized in that: The rotating unit (4) comprises: A connecting tube (41) fixedly mounted on the top end of the fixed sleeve (11); A rotating cylinder (42) is fixedly connected to the bottom end of the fixed section (121), and the rotating cylinder (42) is rotatably connected to the inner wall of the connecting cylinder (41); A transmission box (43) fixedly mounted on the outside of the connecting tube (41); A driving motor (44) is fixedly mounted on the outside of the fixed sleeve (11), and an output end of the driving motor (44) is drivingly connected to the rotating cylinder (42).

9. The exhaust gas online monitoring device using multi-channel sampling according to claim 8 is characterized in that: A transmission gear ring (45) is embedded in the outer ring surface of the rotating cylinder (42), a driving gear (46) is rotatably connected inside the transmission box (43), the driving gear (46) is meshingly connected to the transmission gear ring (45), and an output end of the driving motor (44) extends toward the inside of the transmission box (43) and is fixedly connected to the inner wall of the driving gear (46).

10. A transmission method for an exhaust gas online monitoring device using multi-channel sampling according to any one of claims 1 to 9, characterized in that: The transmission method comprises the following steps: Step 1, sampling component (2) samples the exhaust gas, and the exhaust gas is processed by the pre-treatment unit and then analyzed by the gas analysis module; Step 2: First detect whether the VOCs concentration is within the threshold value. When the VOCs concentration is within the threshold value, repeat step 1. When the VOCs concentration is greater than the upper threshold value, start the deflection unit (3) to deflect the movable sleeve (12) and the sampling component (2) on the top of the movable sleeve (12) by 45 degrees, and start the rotation unit (4) to drive the movable sleeve (12) and the sampling component (2) on the top of the movable sleeve (12) to rotate, and then perform exhaust gas sampling. Step 3: Detect for the second time whether the VOCs concentration is within the threshold value. When the VOCs concentration is within the threshold value, start the deflection unit (3) to reset, stop the rotation unit (4), and use the gas analysis module to send data to the monitoring platform. When the VOCs concentration is greater than the upper threshold value, start the deflection unit (3), deflect the movable sleeve (12) and the sampling component (2) on the top of the movable sleeve (12) by 90 degrees, and start the rotation unit (4) to drive the movable sleeve (12) and the sampling component (2) on the top of the movable sleeve (12) to rotate, and then perform exhaust gas sampling; Step 4: Detect for the third time whether the VOCs concentration is within the threshold value. When the VOCs concentration is within the threshold value, start the deflection unit (3) to reset, stop the rotation unit (4), and use the gas analysis module to send data to the monitoring platform. When the VOCs concentration is still greater than the upper threshold value, use the gas analysis module to send data to the monitoring platform and send a VOCs concentration exceeding standard signal. At the same time, start the deflection unit (3) to reset, and stop the rotation unit (4).

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