Volatile organic compound monitoring equipment for atmospheric environment monitoring

Abstract

The invention discloses volatile organic compound monitoring equipment for atmospheric environment monitoring, and relates to the technical field of environmental monitoring, the volatile organic compound monitoring equipment comprises monitoring cylinders and an air inlet and outlet mechanism, the air inlet and outlet mechanism comprises two air inlet and outlet cylinders, a suction rod and a piston, and the two air inlet and outlet cylinders are fixedly mounted at the front ends of the two monitoring cylinders through bolts respectively; the opening directions are opposite, and the two suction rods are movably installed in the two monitoring cylinders in an inserted mode respectively. According to the device, the two monitoring cylinders are used for extracting air and exhausting air respectively, so that the device can continuously monitor volatile organic compounds in the atmospheric environment, and after air is extracted into the monitoring cylinders, the semicircular valve plates are driven to unfold to seal the monitoring cylinders, so that the extracted air is reserved in the monitoring cylinders; the situation that the monitoring sample size of the monitor is too low in unit time due to the high air flow speed is avoided, and the data accuracy of the device for monitoring the volatile organic compounds in the atmospheric environment is improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental monitoring, and in particular to a volatile organic compound monitoring device for atmospheric environment monitoring. Background Art

[0002] Most of the volatile organic compounds contained in the atmosphere have hazards such as teratogenicity, carcinogenicity, and mutagenicity. They are important inducements of atmospheric photochemical hazards, greenhouse effects and other phenomena. In order to timely monitor and control the degree of atmospheric pollution, real-time detection of the volatile organic compound content in the atmosphere is becoming increasingly important. The Chinese patent application with application number 202210992997.8 discloses "A volatile organic compound monitoring device for atmospheric environment monitoring, involving the field, the present invention comprises: a support rod, the bottom of the support rod is fixedly connected to a bottom plate, the outer side wall of the support rod is fixedly connected to a fixing ring, and the outer side wall of the fixing ring is fixedly connected to A plurality of support plates, one end of the support plate away from the fixing ring is fixedly connected to a fixing plate; a detection mechanism, the detection mechanism for detecting volatile organic matter in the atmospheric environment is located on the support rod; a rain shield and cleaning mechanism, the rain shield and cleaning mechanism for protecting and cleaning the detection mechanism is located on the detection mechanism. The present invention reduces the entry of rainwater into the interior of the suction head when it rains, thereby reducing the entry of rainwater into the interior of the organic detector and erosion of the organic detector, thereby increasing the service life of the organic detector, and thereby improving the working effect of the organic detector on the detection of organic matter in the atmospheric environment"; This technical solution only solves the problem that water enters the interior of the detector, which will corrode the interior of the detector, reduce the service life of the detector and the efficiency of the detector in detecting organic matter in the atmospheric environment. Existing equipment for monitoring the atmospheric environment usually uses a monitor to monitor the flowing air in real time. However, in a windy environment, the air contacting the monitor per unit time is updated quickly, which can easily lead to inaccurate data measured by the monitor. In addition, the air not only contains volatile organic compounds, but also usually contains inhalable particulate matter. After long-term use, the equipment is prone to accumulation of solid particles, and the solid particles trapped in the equipment will also cause abnormal data measured by the monitor. Summary of the invention

[0003] The purpose of the present invention is to provide a volatile organic compound monitoring device for atmospheric environment monitoring to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a volatile organic compound monitoring device for atmospheric environment monitoring, comprising a monitoring tube, wherein the monitoring tubes are two in total and are fixedly connected by a partition, and the bottom ends of the two monitoring tubes are fixedly installed with a monitoring instrument by bolts, and the probes of the monitoring instrument are fixedly installed at the rear side of the bottom end of the monitoring tube by insertion, and also include an air inlet and outlet mechanism, an opening and closing mechanism, and a dust filtering mechanism: An air inlet and outlet mechanism, the air inlet and outlet mechanism comprises an air inlet and outlet cylinder, a suction rod and a piston. There are two air inlet and outlet cylinders and they are fixedly mounted at the front ends of two monitoring cylinders by bolts, and the opening directions are opposite. There are two suction rods and they are installed inside the two monitoring cylinders by insertion. There are two pistons and they are installed inside the two monitoring cylinders by sliding. The piston is fixedly mounted on one end of the piston located inside the monitoring cylinder by bolts. An opening and closing mechanism, the opening and closing mechanism comprises a valve stem, a rod sleeve and a semicircular valve plate, the valve stems are two in total and are respectively located at the front ends of the two monitoring tubes, and the two ends are respectively installed in the middle of the top end and the bottom end of the monitoring tube by insertion, the rod sleeve is movably sleeved on the valve stem, and the semicircular valve plates are two in total and are respectively fixedly installed in the middle of the side opposite to the valve stem and the rod sleeve by welding; The dust filtering mechanism comprises a filter screen and a rotating sleeve. The filter screen is movably arranged inside the air inlet and outlet cylinders, and the rotating sleeve is movably sleeved on one end of the air inlet and outlet cylinders away from the monitoring cylinder through a bearing.

[0005] Preferably, the air inlet and outlet mechanism includes a support frame, a first sealing sleeve and a reciprocating rack. The support frame is fixedly installed on the end of the monitoring tube away from the air inlet and outlet cylinders by bolts, the suction rod is installed in the middle of the support frame by insertion, the end of the first sealing sleeve close to the air inlet and outlet cylinders is fixedly set on the side of the piston close to the support frame, the end of the first sealing sleeve away from the air inlet and outlet cylinders is fixedly set on the side of the support frame close to the piston, there are two reciprocating racks and they are fixedly installed in the middle of the side close to the two suction rods by bolts respectively, and the reciprocating rack is installed in the middle of the support frame by insertion.

[0006] Preferably, the air inlet and outlet mechanism includes a fixed frame, a reciprocating gear and a driving motor. The fixed frame is fixedly installed in the middle of one side of the two support frames away from the monitoring tube by bolts, the reciprocating gear is movably installed in the middle of the inside of the fixed frame through a bearing, and the driving motor is fixedly installed in the middle of the bottom end of the fixed frame by bolts. The output shaft of the driving motor is movably installed in the inside of the fixed frame by insertion, and is fixedly connected to the reciprocating gear by bolts.

[0007] Preferably, the opening and closing mechanism includes a cam, an insert rod, a translation seat and a push groove. There are two groups of cams with two cams in each group. Each group of cams is fixedly sleeved on the top end of the valve stem and the top end of the rod sleeve by bolts. There are two insert rods and they are fixedly installed between each group of cams by bolts, and are respectively located at the end of the two cams away from the valve stem. The translation seat is installed between each group of cams by insertion. The push groove is opened on the left and right sides of the translation seat close to one end of the valve stem, and the insert rod is installed in the push groove by insertion.

[0008] Preferably, the opening and closing mechanism includes a first support block, a first support rod, a connecting rod, a baffle and a second support block. The first support block is fixedly installed in the middle of the top end of the monitoring tube by bolts and is located between the inlet and outlet cylinders and the valve stem. The first support rod is fixedly installed on the front side of the translation seat by bolts. The first support rod is installed in the top end of the first support block by insertion. There are several connecting rods and one end close to the valve stem is fixedly installed on the side of the translation seat away from the valve stem by bolts. The baffle is fixedly installed on the end of the connecting rod away from the translation seat by bolts. The second support block is fixedly installed in the middle of the rear top end of the monitoring tube by bolts.

[0009] Preferably, the opening and closing mechanism includes a second support rod, a linkage rod, a first spring and a synchronization plate, the second support rods have a total of several rods and one end close to the baffle is fixedly installed on the side of the baffle away from the connecting rod by bolts, the second support rod is installed inside the second support block by insertion, the linkage rod is installed between the baffle and the second support block by insertion, the first spring is movably sleeved on the linkage rod and is located between the baffle and the second support block, the synchronization plate is fixedly installed on the end of the suction rod away from the piston by bolts, and the end of the linkage rod away from the air inlet and outlet cylinder is fixedly installed on the top of the synchronization plate by bolts.

[0010] Preferably, the dust filtering mechanism includes a connecting ring, a spring rod, a second spring and a second sealing sleeve. The connecting ring is fixedly installed at one end of the inlet and outlet cylinder away from the monitoring cylinder by bolts. There are a number of spring rods and they are evenly installed in the connecting ring by insertion. The filter is fixedly connected to the spring rods on one side close to the connecting ring by bolts. There are a number of second springs and they are respectively movably sleeved on a number of spring rods and are located between the connecting ring and the filter. The two ends of the second sealing sleeve are respectively fixedly arranged between the connecting ring and the filter.

[0011] Preferably, the dust filtering mechanism includes a first protrusion, a second protrusion, a driving rack and a driving gear, the first protrusions are several in number and are evenly fixed by bolts on the side of the filter away from the connecting ring, the second protrusions are several in number and are evenly fixed by bolts on the side wall of the rotating sleeve away from the end of the air inlet and outlet cylinder, the end of the driving rack away from the air inlet and outlet cylinder is fixed by bolts on the end of the synchronization plate away from the fixed frame, and the driving gear is movably installed on the rear end side wall of the monitoring cylinder through a bearing.

[0012] Preferably, the dust filtering mechanism includes a first axis frame, a first transmission shaft, a ratchet and ratchet teeth. The first axis frame is fixedly installed on the side wall of the monitoring tube by bolts and is located below the driving gear. The driving rack is installed in the first axis frame by insertion. The first transmission shaft is installed on the top of the first axis frame by bearings. The ratchet is fixedly sleeved on one end of the first transmission shaft close to the driving gear by bolts. There are several ratchet teeth that are evenly arranged in a circle and are installed on one side of the driving gear close to the first transmission shaft through a rotating shaft. The ratchet teeth are connected to the ratchet wheel by one-way meshing.

[0013] Preferably, the dust filtering mechanism includes a second axis frame, a second transmission shaft, a first transmission belt and a second transmission belt. The second axis frame is fixedly mounted on the front end side wall of the monitoring tube by bolts, and the second transmission shaft is movably mounted in the middle of the second axis frame through a bearing. The two ends of the first transmission belt are respectively movably connected to the first transmission shaft and the end of the second transmission shaft away from the monitoring tube, and the two ends of the second transmission belt are respectively movably connected to the rotating sleeve and the end of the second transmission shaft located in the second axis frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is designed and installed with an air inlet and outlet mechanism and an opening and closing mechanism. Two suction rods are driven to move in opposite directions at the same time by two reciprocating racks moving in opposite directions, and two pistons in two monitoring cylinders are driven to pump and exhaust respectively, so that the device can pump a large amount of air in the atmospheric environment into the monitoring cylinder for volatile organic compound monitoring. The two monitoring cylinders are used to pump and exhaust respectively, so that the device can monitor the volatile organic compounds in the atmospheric environment uninterruptedly. After the air is pumped into the monitoring cylinder, the semicircular valve plate is driven to expand and close the monitoring cylinder, so that the pumped air remains in the monitoring cylinder, avoiding the high air flow rate resulting in too low a monitoring sample amount for the monitor per unit time, thereby improving the data accuracy of the device for monitoring volatile organic compounds in the atmospheric environment; 2. The present invention is designed and installed with a dust filtering mechanism. When air is drawn into the monitoring tube, solid particles contained in the air are filtered through the filter to prevent the solid particles from affecting the monitoring of volatile organic compounds by the monitor, and at the same time prevent the solid particles from entering the monitoring tube and causing the tube to be contaminated. The piston pushes the air in the monitoring tube and drives the rotating sleeve to rotate, so that the filter is squeezed and then ejected by elastic force to generate vibration, so that the solid particles blocked and retained on the filter are shaken off, and the shaken solid particles are blown out by the pushed air, so that the filter can still maintain a high-efficiency filtering capacity under long-term use, thereby improving the stability of the device during use and the data accuracy when monitoring volatile organic compounds in the atmosphere. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Provides an overall structural diagram for an embodiment of the present invention; Figure 2 A schematic diagram of the internal structure of a device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the partial structure of the air inlet and outlet mechanism provided in an embodiment of the present invention; Figure 4 A schematic diagram of an opening and closing mechanism provided in an embodiment of the present invention; Figure 5 A schematic diagram of a dust filtering mechanism provided in an embodiment of the present invention; Figure 6 A schematic diagram of a decomposition mechanism of a filter screen and a first protrusion provided in an embodiment of the present invention; Figure 7 A schematic structural diagram of a ratchet wheel and ratchet teeth provided in an embodiment of the present invention.

[0016] In the figure: 1, monitoring tube; 2, monitoring instrument; 3, air inlet and outlet mechanism; 301, air inlet and outlet tube; 302, support frame; 303, suction rod; 304, piston; 305, first sealing sleeve; 306, reciprocating rack; 307, fixed frame; 308, reciprocating gear; 309, driving motor; 4, opening and closing mechanism; 401, valve stem; 402, rod sleeve; 403, semicircular valve plate; 404, cam; 405, plug rod; 406, translation seat; 407, push groove; 408, first support block; 409, first support rod; 410, connecting rod; 411, baffle; 412, second support block ; 413, second support rod; 414, linkage rod; 415, first spring; 416, synchronous plate; 5, dust filtering mechanism; 501, connecting ring; 502, spring rod; 503, filter; 504, second spring; 505, second sealing sleeve; 506, first protrusion; 507, rotating sleeve; 508, second protrusion; 509, driving rack; 510, driving gear; 511, first shaft frame; 512, first transmission shaft; 513, ratchet; 514, ratchet; 515, second shaft frame; 516, second transmission shaft; 517, first transmission belt; 518, second transmission belt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figures 1 to 7 The present invention provides a technical solution: a volatile organic compound monitoring device for atmospheric environment monitoring, comprising a monitoring tube 1, two monitoring tubes 1 are fixedly connected by a partition, the bottom ends of the two monitoring tubes 1 are fixedly installed with a monitor 2 by bolts, the probes of the monitor 2 are fixedly installed at the rear side of the bottom end of the monitoring tube 1 by insertion, and also includes an air inlet and outlet mechanism 3, an opening and closing mechanism 4 and a dust filtering mechanism 5: The air inlet and outlet mechanism 3 includes an air inlet and outlet cylinder 301, a suction rod 303 and a piston 304. There are two air inlet and outlet cylinders 301, which are respectively fixedly installed at the front ends of the two monitoring cylinders 1 by bolts, and the opening directions are opposite. There are two suction rods 303, which are respectively installed inside the two monitoring cylinders 1 by insertion. There are two pistons 304, which are respectively installed inside the two monitoring cylinders 1 by sliding. The piston 304 is fixedly installed at one end of the piston 304 located inside the monitoring cylinder 1 by bolts. The opening and closing mechanism 4 includes a valve stem 401, a rod sleeve 402 and a semicircular valve plate 403. There are two valve stems 401, which are respectively located at the front ends of the two monitoring tubes 1, and both ends are respectively installed in the middle of the top and bottom ends of the monitoring tube 1 by insertion. The rod sleeve 402 is movably sleeved on the valve stem 401. There are two semicircular valve plates 403, which are respectively fixed by welding in the middle of the side opposite to the valve stem 401 and the rod sleeve 402. The dust filtering mechanism 5 comprises a filter screen 503 and a rotating sleeve 507 . The filter screen 503 is movably arranged inside the air inlet and outlet cylinder 301 . The rotating sleeve 507 is movably sleeved on an end of the air inlet and outlet cylinder 301 away from the monitoring cylinder 1 through a bearing.

[0019] The air inlet and outlet mechanism 3 includes a support frame 302, a first sealing sleeve 305 and a reciprocating rack 306. The support frame 302 is fixedly installed on the end of the monitoring tube 1 away from the air inlet and outlet cylinder 301 by bolts, and the suction rod 303 is installed in the middle of the support frame 302 by insertion. The end of the first sealing sleeve 305 close to the air inlet and outlet cylinder 301 is fixedly arranged on the side of the piston 304 close to the support frame 302, and the end of the first sealing sleeve 305 away from the air inlet and outlet cylinder 301 is fixedly arranged on the side of the support frame 302 close to the piston 304. There are two reciprocating racks 306 and they are fixedly installed in the middle of the sides close to the two suction rods 303 by bolts respectively. The reciprocating rack 306 is installed in the middle of the support frame 302 by insertion. The reciprocating rack 306 moving out of the monitoring tube 1 drives the piston 304 to move in the monitoring tube 1 in the direction away from the air inlet and outlet cylinder 301 through the suction rod 303 connected thereto, and at this time, the air outside the monitoring tube 1 is sucked into the monitoring tube 1; The air inlet and outlet mechanism 3 includes a fixed frame 307, a reciprocating gear 308 and a driving motor 309. The fixed frame 307 is fixedly installed in the middle of one side of the two support frames 302 away from the monitoring tube 1 by bolts. The reciprocating gear 308 is movably installed in the middle of the inside of the fixed frame 307 through a bearing. The driving motor 309 is fixedly installed in the middle of the bottom end of the fixed frame 307 by bolts. The output shaft of the driving motor 309 is movably installed in the inside of the fixed frame 307 by insertion, and is fixedly connected to the reciprocating gear 308 by bolts. The reciprocating gear 308 is driven to rotate by the driving motor 309. When the driving motor 309 rotates, it drives the two reciprocating racks 306 to move in opposite directions. The opening and closing mechanism 4 includes a cam 404, an insert rod 405, a translation seat 406 and a push groove 407. There are two groups of cams 404, each group of which has two cams. Each group of cams 404 is respectively fixedly sleeved on the top of the valve stem 401 and the top of the rod sleeve 402 by bolts. There are two insert rods 405, which are respectively fixedly installed between each group of cams 404 by bolts and are respectively located at one end of the two cams 404 away from the valve stem 401. The translation seat 406 is installed between each group of cams 404 by insertion. The push groove 407 is provided on the left and right sides of the translation seat 406 close to one end of the valve stem 401, and the insertion rod 405 is installed in the push groove 407 by insertion; the insertion rod 405 inserted into the push groove 407 drives the two cams 404 to rotate simultaneously, so that the valve stem 401 and the rod sleeve 402 rotate simultaneously, so as to drive the two semicircular valve plates 403 to rotate and expand into a circle at the same time, and at this time, the monitoring tube 1 is closed by the semicircular valve plate 403, so that the air drawn into the monitoring tube 1 is closed in the monitoring tube 1; The opening and closing mechanism 4 includes a first support block 408, a first support rod 409, a connecting rod 410, a baffle 411 and a second support block 412. The first support block 408 is fixedly installed in the middle of the top of the monitoring tube 1 by bolts and is located between the inlet and outlet cylinders 301 and the valve stem 401. The first support rod 409 is fixedly installed in the front side of the translation seat 406 by bolts. The first support rod 409 is installed in the top of the first support block 408 by insertion. There are a number of connecting rods 410 and one end close to the valve stem 401 is fixedly installed by bolts on the side of the translation seat 406 away from the valve stem 401. The baffle 411 is fixedly installed by bolts on the end of the connecting rod 410 away from the translation seat 406. The second support block 412 is fixedly installed in the middle of the top of the rear side of the monitoring tube 1 by bolts; the first spring 415 is compressed by the baffle 411, and when the baffle 411 moves, the translation seat 406 is driven to move simultaneously by the connecting rod 410; The opening and closing mechanism 4 includes a second support rod 413, a linkage rod 414, a first spring 415 and a synchronization plate 416. The second support rod 413 has a plurality of rods and one end close to the baffle 411 is fixedly installed on the side of the baffle 411 away from the connecting rod 410 by bolts. The second support rod 413 is installed inside the second support block 412 by insertion. The linkage rod 414 is installed between the baffle 411 and the second support block 412 by insertion. The first spring 415 is movably sleeved on the linkage rod 414 and is located between the baffle 411 and the second support block 412. The synchronization plate 416 is fixedly installed by bolts. Installed at the end of the suction rod 303 away from the piston 304, the end of the linkage rod 414 away from the air inlet and outlet cylinder 301 is fixedly installed on the top of the synchronization plate 416 by bolts; the elastic force of the first spring 415 drives the translation seat 406 to move in the direction close to the air inlet and outlet cylinder 301, and the two semicircular valve plates 403 are driven to rotate and merge through the translation seat 406. At this time, the interior of the monitoring cylinder 1 is no longer closed. When the piston 304 follows the suction rod 303 to move in the direction of the air inlet and outlet cylinder 301, the air monitored in the monitoring cylinder 1 is pushed out of the monitoring cylinder 1 and discharged into the atmosphere through the air inlet and outlet cylinder 301; The dust filter mechanism 5 includes a connecting ring 501, a spring rod 502, a second spring 504 and a second sealing sleeve 505. The connecting ring 501 is fixedly installed at one end of the inlet and outlet cylinder 301 away from the monitoring cylinder 1 by bolts. There are a plurality of spring rods 502 and they are evenly installed in the connecting ring 501 by insertion. The filter screen 503 is fixedly connected to the spring rod 502 on one side close to the connecting ring 501 by bolts. There are a plurality of second springs 504 and they are respectively movably sleeved on a plurality of spring rods 502. Located between the connecting ring 501 and the filter screen 503, the two ends of the second sealing sleeve 505 are respectively fixedly arranged between the connecting ring 501 and the filter screen 503; the filter screen 503 is popped out and reset by the elastic force of the second spring 504, and the filter screen 503 vibrates after being popped out, so that the solid particles retained on the filter screen 503 are shaken off, and because the piston 304 pushes out the air in the monitoring cylinder 1, the pushed out air blows the shaken solid particles out of the inlet and outlet cylinder 301, thereby maintaining the filtering effect of the filter screen 503; The dust filtering mechanism 5 includes a first protrusion 506, a second protrusion 508, a driving rack 509 and a driving gear 510. The first protrusion 506 has a total of several pieces and is evenly fixedly installed on the side of the filter 503 away from the connecting ring 501 by bolts. The second protrusion 508 has a total of several pieces and is evenly fixedly installed on the side wall of the rotating sleeve 507 away from the end of the inlet and outlet cylinder 301 by bolts. The end of the driving rack 509 away from the inlet and outlet cylinder 301 is fixedly installed on the end of the synchronous plate 416 away from the fixed frame 307 by bolts. The driving gear 510 is movably installed on the rear end side wall of the monitoring cylinder 1 through a bearing. The first protrusion 506 is squeezed by the rotating second protrusion 508, so that the filter 503 is squeezed and moves toward the connecting ring 501. At this time, the filter 503 drives the spring rod 502 to move toward the connecting ring 501, so that the second spring 504 is compressed and stores energy. The dust filter mechanism 5 includes a first shaft frame 511, a first transmission shaft 512, a ratchet 513 and ratchet teeth 514. The first shaft frame 511 is fixedly installed on the side wall of the monitoring tube 1 by bolts and is located below the driving gear 510. The driving rack 509 is installed in the first shaft frame 511 by insertion. The first transmission shaft 512 is installed on the top of the first shaft frame 511 by bearings. The ratchet 513 is fixedly sleeved on the end of the first transmission shaft 512 close to the driving gear 510 by bolts. There are a total of several ratchet teeth 514 in a circular shape. The ratchet teeth 514 are evenly arranged and movably installed on the side of the driving gear 510 close to the first transmission shaft 512 through the rotating shaft, and the ratchet teeth 514 are movably connected with the ratchet wheel 513 through one-way meshing; the ratchet wheel 513 is driven to rotate by the ratchet teeth 514 on the driving gear 510, and when the driving rack 509 rotates in the direction away from the air inlet and outlet cylinder 301, the ratchet teeth 514 do not mesh with the ratchet wheel 513, so that the ratchet wheel 513 does not rotate, so the ratchet teeth 514 can drive the first transmission shaft 512 to rotate only when the driving rack 509 moves in the direction of the air inlet and outlet cylinder 301; The dust filtering mechanism 5 includes a second axis frame 515, a second transmission shaft 516, a first transmission belt 517 and a second transmission belt 518. The second axis frame 515 is fixedly installed on the front end side wall of the monitoring tube 1 by bolts, and the second transmission shaft 516 is movably installed in the middle of the second axis frame 515 through a bearing. The two ends of the first transmission belt 517 are respectively movably sleeved on the first transmission shaft 512 and the end of the second transmission shaft 516 away from the monitoring tube 1, and the two ends of the second transmission belt 518 are respectively movably sleeved on the rotating sleeve 507 and the end of the second transmission shaft 516 located in the second axis frame 515; the second transmission shaft 516 is driven to rotate by the first transmission belt 517, and when the second transmission shaft 516 rotates, the rotating sleeve 507 is driven to rotate by the second transmission belt 518, so that the second protrusion 508 rotates simultaneously with the rotating sleeve 507.

[0020] Working principle: When the present invention is in use, the driving motor 309 is started, and the reciprocating gear 308 is driven to rotate by the driving motor 309. When the driving motor 309 rotates, it drives the two reciprocating racks 306 to move in opposite directions. The reciprocating rack 306 moving out of the monitoring tube 1 drives the piston 304 to move in the monitoring tube 1 away from the air inlet and outlet cylinder 301 through the suction rod 303 connected thereto. At this time, the air outside the monitoring tube 1 is sucked into the monitoring tube 1. In the process of the air entering the monitoring tube 1, the solid particles in the air are first blocked by the filter 503, so that the air entering the monitoring tube 1 contains only volatile organic compounds; When the suction rod 303 moves out of the monitoring tube 1, the linkage rod 414 is driven to move simultaneously through the synchronization plate 416. When the end of the linkage rod 414 away from the synchronization plate 416 contacts the baffle 411, the baffle 411 is driven to move simultaneously, and the first spring 415 is compressed by the baffle 411. When the baffle 411 moves, the translation seat 406 is driven to move simultaneously through the connecting rod 410. When the translation seat 406 moves in the direction away from the air inlet and outlet cylinder 301, the two cams 404 are driven to rotate simultaneously through the insertion rod 405 inserted into the push groove 407, so that the valve stem 401 and the rod sleeve 402 rotate simultaneously, so as to drive the two semicircular valve plates 403 to rotate and expand into a circle at the same time. At this time, the monitoring tube 1 is closed by the semicircular valve plate 403, so that the air drawn into the monitoring tube 1 is closed in the monitoring tube 1, and then the air in the monitoring tube 1 is monitored for volatile organic compounds through the probe inserted into the monitoring tube 1 by the monitor 2. In the other monitoring tube 1, as the suction rod 303 moves into the monitoring tube 1, the linkage rod 414 above it is driven to move in the direction close to the air inlet and outlet cylinder 301. When the linkage rod 414 moves, the elastic force of the first spring 415 drives the translation seat 406 to move in the direction close to the air inlet and outlet cylinder 301, and the two semicircular valve plates 403 are driven to rotate and merge through the translation seat 406. At this time, the interior of this monitoring tube 1 is no longer closed. When the piston 304 follows the suction rod 303 to move in the direction of the air inlet and outlet cylinder 301, the air monitored in the monitoring tube 1 is pushed out of the monitoring tube 1 and discharged into the atmosphere through the air inlet and outlet cylinder 301. When the suction rod 303 moves toward the direction of the air inlet and outlet cylinder 301, the driving rack 509 is driven to move toward the direction of the air inlet and outlet cylinder 301 through the synchronous plate 416, and the driving rack 509 drives the driving gear 510 to rotate. When the driving gear 510 rotates, the ratchet 514 on the driving gear 510 drives the ratchet 513 to rotate. When the driving rack 509 rotates in the direction away from the air inlet and outlet cylinder 301, the ratchet 514 does not mesh with the ratchet 513, so that the ratchet 513 does not rotate. Therefore, only when the driving rack 509 moves toward the direction of the air inlet and outlet cylinder 301, the ratchet 514 can drive the first transmission shaft 512 to rotate. When the first transmission shaft 512 rotates, the second transmission shaft 516 is driven to rotate through the first transmission belt 517. When the second transmission shaft 516 rotates, the rotating sleeve 507 is driven to rotate through the second transmission belt 518, so that the second protrusion 508 rotates simultaneously with the rotating sleeve 507. The first protrusion 506 is squeezed by the rotating second protrusion 508, so that the filter 503 is squeezed and moves toward the connecting ring 501. At this time, the filter 503 drives the spring rod 502 to move toward the connecting ring 501, so that the second spring 504 is compressed and stores energy. When the second protrusion 508 rotates away from the first protrusion 506, the filter 503 is popped out and reset by the elastic force of the second spring 504. After the filter 503 is popped out, it vibrates, so that the solid particles retained on the filter 503 are shaken off, and because the piston 304 pushes the internal air of the monitoring cylinder 1, the pushed out air blows the shaken solid particles out of the inlet and outlet cylinder 301, thereby maintaining the filtering effect of the filter 503, so that the device can maintain high-efficiency air filtering ability under long-term use.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A volatile organic compound monitoring device for atmospheric environment monitoring, comprising a monitoring tube (1), wherein there are two monitoring tubes (1) and the two monitoring tubes (1) are fixedly connected via a partition, a monitoring instrument (2) is fixedly mounted at the bottom end of each of the two monitoring tubes (1), and a probe of the monitoring instrument (2) is fixedly mounted at the rear side of the bottom end of the monitoring tube (1), characterized in that: It also includes an air inlet and outlet mechanism (3), an opening and closing mechanism (4) and a dust filtering mechanism (5): An air inlet and outlet mechanism (3), the air inlet and outlet mechanism (3) comprising an air inlet and outlet cylinder (301) and a suction rod (303), the air inlet and outlet cylinders (301) being two in total and fixedly mounted on the front ends of the two monitoring cylinders (1) respectively, and having opening directions opposite to each other, and the suction rods (303) being two in total and movably mounted inside the two monitoring cylinders (1) respectively; An opening and closing mechanism (4), the opening and closing mechanism (4) comprising a valve stem (401), a rod sleeve (402) and a semicircular valve plate (403), the valve stem (401) having two in total and being respectively located at the front ends of the two monitoring tubes (1), and the two ends being movably mounted in the middle of the top end and the bottom end of the monitoring tube (1), the rod sleeve (402) being movably sleeved on the valve stem (401), and the semicircular valve plate (403) having two in total and being respectively fixedly mounted in the middle of the side opposite to the valve stem (401) and the rod sleeve (402); A dust filtering mechanism (5), the dust filtering mechanism (5) comprising a filter screen (503), the filter screen (503) being movably arranged inside the air inlet and outlet cylinder (301).

2. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 1, characterized in that: The air inlet and outlet mechanism (3) comprises a support frame (302), a piston (304), a first sealing sleeve (305) and a reciprocating rack (306); the support frame (302) is fixedly mounted on an end of the monitoring tube (1) away from the air inlet and outlet tube (301) by means of bolts; the suction rod (303) is installed in the middle of the support frame (302) by means of insertion; there are two pistons (304) which are respectively installed in the interior of the two monitoring tubes (1) by means of sliding movements; the pistons (304) are fixedly mounted on the suction rod (303) by means of bolts at the position of the monitoring tube. (1), one end of the first sealing sleeve (305) close to the air inlet and outlet cylinder (301) is fixedly arranged on the side of the piston (304) close to the support frame (302), and one end of the first sealing sleeve (305) away from the air inlet and outlet cylinder (301) is fixedly arranged on the side of the support frame (302) close to the piston (304), and there are two reciprocating racks (306) which are respectively fixedly installed in the middle of the sides close to the two suction rods (303) by bolts, and the reciprocating racks (306) are installed in the middle of the support frame (302) by insertion.

3. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 2, characterized in that: The air inlet and outlet mechanism (3) comprises a fixed frame (307), a reciprocating gear (308) and a driving motor (309); the fixed frame (307) is fixedly mounted in the middle of a side of two support frames (302) away from the monitoring tube (1) by means of bolts; the reciprocating gear (308) is movably mounted in the middle of the interior of the fixed frame (307) by means of a bearing; the driving motor (309) is fixedly mounted in the middle of the bottom end of the fixed frame (307) by means of bolts; the output shaft of the driving motor (309) is movably mounted in the interior of the fixed frame (307) by means of insertion, and is fixedly connected to the reciprocating gear (308) by means of bolts.

4. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 3, characterized in that: The opening and closing mechanism (4) comprises a cam (404), an insert rod (405), a translation seat (406) and a push groove (407). The cams (404) are provided in two groups, each group having two cams. Each group of cams (404) is respectively fixedly sleeved on the top of the valve stem (401) and the top of the rod sleeve (402) by means of bolts. The insert rods (405) are provided in two groups, each of which is respectively fixedly installed between each group of cams (404) by means of bolts and is respectively located at one end of the two cams (404) away from the valve stem (401). The translation seat (406) is installed between each group of cams (404) by means of insertion. The push groove (407) is provided on the left and right sides of the translation seat (406) close to one end of the valve stem (401), and the insert rod (405) is installed in the push groove (407) by means of insertion.

5. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 4, characterized in that: The opening and closing mechanism (4) comprises a first support block (408), a first support rod (409), a connecting rod (410), a baffle (411) and a second support block (412); the first support block (408) is fixedly mounted at the middle of the top end of the monitoring tube (1) by means of bolts and is located between the inlet and outlet cylinders (301) and the valve stem (401); the first support rod (409) is fixedly mounted at the front side of the translation seat (406) by means of bolts; the first support rod (409) is installed in the top end of the first support block (408) by means of insertion; there are a plurality of connecting rods (410) and one end of the connecting rod (410) close to the valve stem (401) is fixedly mounted at a side of the translation seat (406) away from the valve stem (401) by means of bolts; the baffle (411) is fixedly mounted at one end of the connecting rod (410) away from the translation seat (406) by means of bolts; and the second support block (412) is fixedly mounted at the middle of the top end of the rear side of the monitoring tube (1) by means of bolts.

6. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 5, characterized in that: The opening and closing mechanism (4) comprises a second support rod (413), a linkage rod (414), a first spring (415) and a synchronization plate (416). The second support rods (413) have a plurality of rods and one end close to the baffle (411) is fixedly mounted on a side of the baffle (411) away from the connecting rod (410) by means of bolts. The second support rod (413) is movably mounted inside the second support block (412) by means of insertion. The linkage rod (414) is movably mounted between the baffle (411) and the second support block (412) by means of insertion. The first spring (415) is movably sleeved on the linkage rod (414) and is located between the baffle (411) and the second support block (412). The synchronization plate (416) is fixedly mounted on one end of the suction rod (303) away from the piston (304) by means of bolts. One end of the linkage rod (414) away from the air inlet and outlet cylinder (301) is fixedly mounted on the top of the synchronization plate (416) by means of bolts.

7. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 6, characterized in that: The dust filtering mechanism (5) comprises a connecting ring (501), a spring rod (502), a second spring (504) and a second sealing sleeve (505); the connecting ring (501) is fixedly mounted at one end of the inlet and outlet cylinder (301) away from the monitoring cylinder (1) by means of bolts; there are a plurality of spring rods (502) which are evenly inserted and movably mounted in the connecting ring (501); a side of the filter screen (503) close to the connecting ring (501) is fixedly connected to the spring rods (502) by means of bolts; there are a plurality of second springs (504) which are movably sleeved on the plurality of spring rods (502) and are located between the connecting ring (501) and the filter screen (503); and two ends of the second sealing sleeve (505) are respectively fixedly arranged between the connecting ring (501) and the filter screen (503).

8. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 7, characterized in that: The dust filtering mechanism (5) comprises a first protrusion (506), a rotating sleeve (507), a second protrusion (508), a driving rack (509) and a driving gear (510); the first protrusion (506) comprises a plurality of protrusions and is evenly fixedly mounted on a side of the filter screen (503) away from the connecting ring (501) by means of bolts; the rotating sleeve (507) is movably sleeved on an end of the air inlet and outlet cylinder (301) away from the monitoring cylinder (1); the second protrusion (508) comprises a plurality of protrusions and is evenly fixedly mounted on a side wall of the rotating sleeve (507) away from the air inlet and outlet cylinder (301) by means of bolts; an end of the driving rack (509) away from the air inlet and outlet cylinder (301) is fixedly mounted on an end of the synchronizing plate (416) away from the fixing frame (307) by means of bolts; and the driving gear (510) is movably mounted on a rear end side wall of the monitoring cylinder (1) by means of a bearing.

9. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 8, characterized in that: The dust filtering mechanism (5) comprises a first shaft frame (511), a first transmission shaft (512), a ratchet (513) and ratchet teeth (514); the first shaft frame (511) is fixedly mounted on the side wall of the monitoring tube (1) by means of bolts and is located below the driving gear (510); the driving rack (509) is movably mounted in the first shaft frame (511) by means of insertion; the first transmission shaft (512) is movably mounted on the top of the first shaft frame (511) by means of a bearing; the ratchet (513) is fixedly sleeved on one end of the first transmission shaft (512) close to the driving gear (510) by means of bolts; there are a plurality of ratchet teeth (514) which are evenly arranged in a circle and movably mounted on one side of the driving gear (510) close to the first transmission shaft (512) by means of a rotating shaft; the ratchet teeth (514) are movably connected to the ratchet wheel (513) by means of a one-way meshing engagement.

10. The volatile organic compound monitoring device for atmospheric environment monitoring according to claim 9, characterized in that: The dust filtering mechanism (5) comprises a second shaft frame (515), a second transmission shaft (516), a first transmission belt (517) and a second transmission belt (518); the second shaft frame (515) is fixedly mounted on the front end side wall of the monitoring tube (1) by means of bolts; the second transmission shaft (516) is movably mounted in the middle of the second shaft frame (515) by means of a bearing; two ends of the first transmission belt (517) are movably sleeved on the first transmission shaft (512) and one end of the second transmission shaft (516) away from the monitoring tube (1); and two ends of the second transmission belt (518) are movably sleeved on the rotating sleeve (507) and one end of the second transmission shaft (516) located in the second shaft frame (515).

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