Device for detecting VOC (Volatile Organic Compounds) in industrial waste gas

Abstract

The invention relates to the technical field of industrial waste gas detection, and provides an industrial waste gas VOC detection device, which comprises a detection cylinder, one end of the detection cylinder is fixedly connected with a first connecting pipe, the top of the first connecting pipe is fixedly connected with a treatment cylinder, and the treatment cylinder is internally provided with an efficient treatment assembly. A cut-off detection assembly is installed in the detection cylinder, the efficient treatment assembly comprises a rotating shaft, the rotating shaft is rotationally connected to the center of the top of the treatment cylinder, a first positioning groove is formed in the top of the treatment cylinder, the cut-off detection assembly comprises a supporting rod and a driving shaft, and a fixing rod is fixedly welded to the driving shaft; and an intercepting cylinder is welded and fixed to the fixing rod, an intercepting groove is formed in the intercepting cylinder in a penetrating mode, and a baffle is welded and fixed in the detection cylinder. By means of the technical scheme, the problems that according to an existing device for detecting VOC in industrial waste gas, a dehumidification component cannot be rapidly replaced, and automatic cut-off detection cannot be conducted on the industrial waste gas are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste gas detection, and in particular to a device for detecting VOC in industrial waste gas. Background Art

[0002] Volatile organic compounds (VOCs) are major pollutants in industrial waste gas, and their emission sources are widespread, covering multiple industries such as petrochemicals, coating and printing, and electronics manufacturing. VOCs not only trigger photochemical smog and exacerbate haze formation, threatening atmospheric environmental quality, but also have toxic effects on the human nervous and respiratory systems. Therefore, VOC detection devices have become key equipment for industrial pollution source monitoring and environmental regulation.

[0003] In order to prevent the VOC gas content in industrial waste gas from exceeding the standard after purification, thus causing environmental pollution, it is necessary to use a VOC detection device to perform online detection on the purified waste gas. However, there are some problems with the existing VOC detection device in the process of detecting industrial waste gas. For example, a VOC high-precision detection device with publication number CN114813262A can remove moisture from the waste gas to prevent damage to the detection equipment and can replace the moisture removal components. However, when replacing the moisture removal components, it is necessary to stop the waste gas detection work, so the waste gas emissions The equipment needs to be shut down for a long time until the dehumidification components are replaced before subsequent detection work can be continued. The dehumidification components cannot be replaced quickly, and the online detection of industrial waste gas cannot be completed efficiently, which has poor practicality. In addition, the existing VOC detection device cannot automatically intercept and detect industrial waste gas during actual operation. Therefore, when the VOC detection device detects continuously flowing industrial waste gas, it is very easy to cause inaccurate detection results due to short detection time or fluctuations in waste gas flow rate. Therefore, it is necessary to provide a VOC detection device in industrial waste gas to meet the needs of users. Summary of the Invention

[0004] The present invention provides a VOC detection device for industrial waste gas, which solves the problems that the existing VOC detection device for industrial waste gas cannot quickly replace the dehumidification components and cannot automatically intercept and detect the industrial waste gas.

[0005] The technical solutions of the present invention are as follows: A device for detecting VOC in industrial waste gas comprises a detection cylinder, one end of the detection cylinder is fixedly connected to a first connecting pipe, the top of the first connecting pipe is fixedly connected to a treatment cylinder, a high-efficiency treatment component is installed in the treatment cylinder, and an interception detection component is installed in the detection cylinder, the high-efficiency treatment component comprises a rotating shaft, the rotating shaft is rotatably connected to the center part of the top of the treatment cylinder, a first positioning groove is provided on the top of the treatment cylinder, a center plate is welded and fixed to the bottom end of the rotating shaft, a mounting cylinder is welded and fixed on the center plate, a first support plate is rotatably connected to the bearing in the mounting cylinder, a dehumidification mesh plate and a filter plate are slidably connected in the mounting cylinder, a limiting groove is provided at the bottom of the first support plate, the interception detection component comprises a support rod and an active shaft, a fixed rod is welded and fixed on the active shaft, an interception cylinder is welded and fixed on the fixed rod, an interception groove is provided on the interception cylinder, and a baffle is welded and fixed in the detection cylinder.

[0006] As a preferred solution of the present invention, a second connecting pipe is fixedly connected to the top of the processing cylinder, a reinforcement rod is welded and fixed on the processing cylinder, one end of the reinforcement rod is welded and fixed to the second connecting pipe, and the other end of the reinforcement rod is welded and fixed to the first connecting pipe, and the other end of the detection cylinder is fixedly connected to a third connecting pipe, and the second connecting pipe and the third connecting pipe are both flange-connected to the exhaust pipe, and the second connecting pipe is located directly above the first connecting pipe.

[0007] As a preferred solution of the present invention, a first connecting plate is welded and fixed to the top end of the rotating shaft, a first spring is welded and fixed to the top end surface of the first connecting plate, a second connecting plate is welded and fixed to the top end surface of the first spring, a first positioning rod is welded and fixed to the bottom end surface of the second connecting plate, the first positioning rod is slidably connected to the first connecting plate, the bottom of the first positioning rod is snap-connected in the first positioning groove, the first positioning rod is symmetrically distributed on both sides of the second connecting plate, the first positioning grooves are symmetrically distributed on both sides of the top of the processing cylinder, and the upper and lower ends of the mounting cylinder are fixedly connected with sealing rings.

[0008] As a preferred solution of the present invention, the top surface of the first support plate and the top surface of the dehumidification mesh plate are fixedly connected with a second positioning rod, the bottom of the dehumidification mesh plate and the bottom of the filter plate are both provided with a second positioning groove, the top of the filter plate is provided with a collecting groove, a grab rod is welded and fixed on the filter plate, and a rubber scraper rod is fixedly connected in the second connecting tube, and the bottom end surface of the rubber scraper rod is in contact with the top surface of the filter plate.

[0009] As a preferred solution of the present invention, a through groove is provided on the top of the processing cylinder, the diameter of the through groove is equal to the inner diameter of the mounting cylinder, a first sealing block is snap-connected in the through groove, a first sealing plate is fixedly connected to the top end of the first sealing block, a first slot is provided on the side end of the first sealing plate, a fixing plate is welded and fixed on the top surface of the processing cylinder, a second spring is welded and fixed on the fixing plate, a first clamping rod is welded and fixed on the second spring, the first clamping rod is slid through and connected to the fixing plate, the end of the first clamping rod is snap-connected in the first slot, the first slots are symmetrically distributed on both sides of the first sealing plate, the first slots correspond one-to-one to the first clamping rod, and the first sealing block is made of rubber.

[0010] As a preferred solution of the present invention, the support rod is welded and fixed in the detection cylinder, an installation box is welded and fixed on the support rod, a servo motor is welded and fixed in the installation box, a first turntable and a limit plate are welded and fixed on the output shaft of the servo motor, a guide rod is welded and fixed on the first turntable, the active shaft is rotatably connected to the installation box, a second turntable and a first bevel gear are welded and fixed on the active shaft, a guide groove is provided on the second turntable, four guide grooves are provided, and the four guide grooves are distributed at equal angles on the second turntable.

[0011] As a preferred solution of the present invention, the intercepting tube is in contact with the inner wall of the detection tube, the intercepting grooves are symmetrically distributed on both sides of the intercepting tube, the depth of the intercepting grooves is less than the width of the baffle, and two groups of baffles are provided, each group of baffles is provided, and the two groups of baffles are symmetrically distributed on both sides of the interior of the detection tube, and the two baffles of each group are symmetrically distributed on both sides of the intercepting tube, and the intercepting tube is in contact with the baffles.

[0012] As a preferred solution of the present invention, a second bevel gear is meshedly connected to the first bevel gear, a driven shaft is welded and fixed to the second bevel gear, a second support plate is welded and fixed to the driven shaft, the second support plate is rotatably connected to the first connecting tube through a bearing, a third spring is welded and fixed to the bottom end surface of the second support plate, a connecting plate is welded and fixed to the bottom end of the third spring, a push rod is welded and fixed to the top end surface of the connecting plate, a limiting block is welded and fixed to the top end of the push rod, the limiting block is snap-connected in the limiting groove, the limiting grooves are distributed at equal angles on the bottom of the first support plate, the limiting grooves correspond one to one to the limiting blocks, the limiting grooves and the limiting blocks are both truncated cone-shaped, and the second support plate and the first support plate are both large-aperture mesh plates.

[0013] As a preferred solution of the present invention, a protective frame is welded and fixed on the detection cylinder, and the protective frame is symmetrically distributed on both sides of the detection cylinder. The protective frame is made of transparent material, and fixed tubes are fixedly connected on both sides of the detection cylinder. A fourth spring is welded and fixed on both sides of the protective frame, and a second clamping rod is welded and fixed on the fourth spring. The second clamping rod is slidingly connected in the protective frame, and a cover plate is slidingly connected in the protective frame. A sealing gasket is fixedly connected to the cover plate, and a second clamping groove is provided on both sides of the cover plate and the sealing gasket, and the end of the second clamping rod is clamped and connected in the second clamping groove.

[0014] As a preferred solution of the present invention, a VOC detector is bolted to the cover plate, a detection head is installed on the VOC detector, the detection head is arranged in a fixed tube, a second sealing plate is fixedly connected to the detection head, a second sealing block and a magnetic frame are fixedly connected to the second sealing plate, the second sealing block is made of rubber, the second sealing block is snap-connected in the fixed tube, the magnetic frames are symmetrically distributed on both sides of the second sealing plate, a storage net frame is magnetically adsorbed and connected in the magnetic frame, and a desiccant is arranged in the storage net frame.

[0015] The working principle and beneficial effects of the present invention are: 1. The present invention is provided with a high-efficiency processing component. By utilizing the cooperation of the first positioning rods on both sides and the corresponding first positioning grooves, the mounting cylinders on both sides can be quickly and stably exchanged in position through the rotating shaft and the center plate, thereby quickly completing the replacement of the dehumidification screen plate and the filter screen plate, so that the exhaust gas can continue to be filtered and dehumidified, ensuring the stability of the subsequent VOC detector working state and greatly reducing the downtime of the exhaust gas emission equipment; after the mounting cylinder is exchanged in position, the staff has sufficient time to disassemble the first sealing plate and replace and clean the replaced dehumidification screen plate and filter screen plate, thereby increasing the convenience of use of the detection device.

[0016] 2. The present invention is provided with an interception detection component. Under the continuous rotation of the first turntable, combined with the guide rod and the four guide grooves on the second turntable, it can drive the driving shaft to rotate intermittently by 90 degrees, and then automatically intercept the exhaust gas through the interception grooves on both sides of the interception cylinder, and cooperate with the baffle to move the intercepted exhaust gas to the detection head in the fixed pipe for stop detection, which effectively improves the accuracy of the detection results of VOC exhaust gas content in industrial exhaust gas, avoids the problem of inaccurate detection results caused by excessive exhaust gas flow rate, and avoids the problem of easy damage to the detection head due to airflow impact, thereby increasing the accuracy and safety of the detection device.

[0017] 3. The present invention provides a limiting block and a limiting groove. During the rotation of the driving shaft, the first bevel gear and the second bevel gear can drive the second supporting plate on the driven shaft to rotate stably. The limiting block and the limiting groove can be used to move the first supporting plate to rotate stably, thereby driving the filter plate on the dehumidification screen to rotate automatically. At this time, under the action of the rubber scraper, the dust and impurities filtered on the surface of the filter plate can be moved to the collection tank for automatic collection, thereby avoiding the problem of clogging of the filter plate during operation that affects the filtering effect, thereby realizing automatic cleaning of the filter plate.

[0018] 4. The present invention is provided with a cover plate and a storage network frame. The second card rod and the second card slot can be used to conveniently disassemble and assemble the VOC detector on the cover plate, thereby ensuring the convenience of subsequent inspection and maintenance of the VOC detector; and combined with the protective frame, the VOC detector can be stably sealed and protected. At the same time, under the action of the desiccant inside the storage network frame, the VOC detector can be stably dehumidified and protected, avoiding the problem of damage to internal electrical components caused by moisture when the VOC detector works in a humid environment, thereby increasing the stability and safety of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure between the treatment cylinder and the reinforcement rod of the present invention; Figure 3 This is a schematic diagram of the main cross-sectional structure of the treatment tube of the present invention; Figure 4 This invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 This is a schematic diagram of the connection structure between the filter plate and the collection tank of the present invention; Figure 6 Schematic diagram of the connection structure between the second spring and the first clamping rod of the present invention; Figure 7 This invention Figure 3 The enlarged structural diagram at B in the middle; Figure 8 This is a schematic diagram of the connection structure between the push rod and the limit block of the present invention; Figure 9 This is a schematic diagram of the side cross-sectional structure of the detection tube of the present invention; Figure 10 It is a schematic diagram of the connection structure between the second turntable and the guide groove of the present invention; Figure 11 This is a schematic diagram of the connection structure between the intercepting tube and the intercepting trough of the present invention; Figure 12 This invention Figure 9 The enlarged structural diagram at C in the middle; Figure 13 This is a schematic diagram of the top-down structure of the protective frame of the present invention; Figure 14 It is a schematic diagram of the connection structure of the magnetic frame and the storage network frame of the present invention.

[0021] 1. Detection tube; 2. First connecting tube; 3. Treatment tube; 4. Second connecting tube; 5. Reinforcement rod; 6. High-efficiency treatment assembly; 601. Rotating shaft; 602. First connecting plate; 603. First spring; 604. Second connecting plate; 605. First positioning rod; 606. First positioning groove; 607. Center plate; 608. Mounting tube; 609. Sealing ring; 610. First supporting plate; 611. Dehumidification screen plate; 612. Filter screen plate; 613. Second positioning rod; 614. Second positioning groove; 615. Collection tank; 616. Grab rod; 617. Rubber scraper; 618. Limiting groove; 619. Through groove; 620. First sealing block; 621. First sealing plate; 622. First clamping groove; 623. Fixing plate; 624. Second spring; 625. First clamping rod; 7. Interception detection assembly; 701. Support rod; 702, installation box; 703, servo motor; 704, first turntable; 705, limit plate; 706, guide rod; 707, driving shaft; 708, second turntable; 709, guide groove; 710, fixing rod; 711, intercepting cylinder; 712, intercepting groove; 713, baffle; 8, first bevel gear; 9, second bevel gear; 10, driven shaft; 11, second supporting plate; 12, third spring; 13, connecting plate; 14, push rod; 15, limit block; 16, protective frame; 17, fourth spring; 18, second clamping rod; 19, cover plate; 20, sealing gasket; 21, second clamping groove; 22, VOC detector; 23, detection head; 24, second sealing plate; 25, second sealing block; 26, magnetic frame; 27, storage network frame; 28, fixing pipe; 29, third connecting pipe; 30, exhaust pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making any creative efforts are within the scope of protection of the present invention.

[0023] Example 1 like Figures 1-14As shown, this embodiment proposes a VOC detection device in industrial waste gas, including a detection cylinder 1, one end of the detection cylinder 1 is fixedly connected to a first connecting pipe 2, the top of the first connecting pipe 2 is fixedly connected to a treatment cylinder 3, a high-efficiency treatment component 6 is installed in the treatment cylinder 3, and a cutoff detection component 7 is installed in the detection cylinder 1, the high-efficiency treatment component 6 includes a rotating shaft 601, the rotating shaft 601 is rotatably connected to the center of the top of the treatment cylinder 3, the top of the treatment cylinder 3 is provided with a first positioning groove 606, the bottom end of the rotating shaft 601 is welded and fixed with a center plate 607, the center plate 607 is welded and fixed with a mounting cylinder 608, the mounting cylinder 608 is rotatably connected with a first support plate 610, the mounting cylinder 608 is slidably connected with a dehumidification screen plate 611 and a filter screen plate 612, the bottom of the first support plate 610 is provided with a limiting groove 618, the cutoff detection The detection component 7 includes a support rod 701 and an active shaft 707, a fixed rod 710 is welded and fixed on the active shaft 707, and an interception tube 711 is welded and fixed on the fixed rod 710. An interception groove 712 is penetrated on the interception tube 711, and a baffle 713 is welded and fixed in the detection tube 1. The high-efficiency processing component 6 can quickly complete the replacement of the dehumidification mesh plate 611 and the filter plate 612, so that the exhaust gas can continue to be filtered and dehumidified, ensuring the stability of the subsequent VOC detector 22 working state, greatly reducing the downtime of the exhaust gas emission equipment; and under the action of the interception detection component 7, the exhaust gas can be automatically intercepted for subsequent stop detection, which effectively improves the accuracy of the detection results of the VOC exhaust gas content in the industrial exhaust gas, and avoids the problem of inaccurate detection results caused by excessive exhaust gas flow rate.

[0024] Example 2 like Figures 1-14 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment also proposes a VOC detection device in industrial waste gas.

[0025] In this embodiment, a second connecting tube 4 is fixedly connected to the top of the processing tube 3, a reinforcement rod 5 is welded and fixed to the processing tube 3, one end of the reinforcement rod 5 is welded and fixed to the second connecting tube 4, and the other end of the reinforcement rod 5 is welded and fixed to the first connecting tube 2, and the other end of the detection tube 1 is fixedly connected to the third connecting tube 29, and the second connecting tube 4 and the third connecting tube 29 are both flange-connected with an exhaust pipe 30, the second connecting tube 4 is located directly above the first connecting tube 2, the top end surface of the first connecting tube 2 is flush with the inner bottom end surface of the processing tube 3, and the bottom end surface of the second connecting tube 4 is flush with the inner top end surface of the processing tube 3, and the first connecting tube 2, the second connecting tube 4 and the mounting tube 608 have the same diameter.

[0026] In this embodiment, a first connecting plate 602 is welded and fixed to the top end of the rotating shaft 601, a first spring 603 is welded and fixed to the top end surface of the first connecting plate 602, a second connecting plate 604 is welded and fixed to the top end surface of the first spring 603, and a first positioning rod 605 is welded and fixed to the bottom end surface of the second connecting plate 604. The first positioning rod 605 is slidably connected to the first connecting plate 602, and the bottom of the first positioning rod 605 is engaged and connected to the first positioning groove 606. The first positioning rods 605 are symmetrically distributed on both sides of the second connecting plate 604, and the first positioning grooves 606 are symmetrically distributed on both sides of the top of the processing cylinder 3. The upper and lower ends of the mounting cylinder 608 are fixedly connected with sealing rings 609, and the sealing ring 609 fits against the inner wall of the processing cylinder 3. By utilizing the cooperation of the first positioning rods 605 on both sides and the corresponding first positioning grooves 606, the mounting cylinders 608 on both sides can be quickly and stably exchanged in position through the rotating shaft 601 and the center plate 607, thereby quickly completing the replacement of the dehumidification screen plate 611 and the filter screen plate 612.

[0027] In this embodiment, the top surface of the first support plate 610 and the top surface of the moisture-removing mesh plate 611 are fixedly connected with the second positioning rod 613, the bottom of the moisture-removing mesh plate 611 and the bottom of the filter plate 612 are provided with a second positioning groove 614, the second positioning rod 613 is engaged in the corresponding second positioning groove 614, the first support plate 610, the moisture-removing mesh plate 611 and the filter plate 612 fit each other, the bottom end surface of the first support plate 610 is flush with the bottom end surface of the mounting cylinder 608, and the top end surface of the mounting cylinder 608 is flush with the bottom end surface of the filter plate 612 The top surface is flush, a collecting groove 615 is provided on the top of the filter plate 612, a grab rod 616 is welded and fixed on the filter plate 612, a rubber scraper 617 is fixedly connected in the second connecting pipe 4, and the bottom end surface of the rubber scraper 617 fits with the top surface of the filter plate 612. Under the action of the second positioning rod 613 and the corresponding second positioning groove 614, the stability of the placement of the dehumidification screen plate 611 and the filter plate 612 can be ensured, and the stability of the subsequent synchronous rotation of the dehumidification screen plate 611 and the filter plate 612 can be ensured.

[0028] In this embodiment, a through groove 619 is provided at the top of the processing cylinder 3. The diameter of the through groove 619 is equal to the inner diameter of the mounting cylinder 608. A first sealing block 620 is connected in a snap-fit ​​manner in the through groove 619. A first sealing plate 621 is fixedly connected to the top of the first sealing block 620. A first slot 622 is provided at the side end of the first sealing plate 621. A fixing plate 623 is welded and fixed to the top surface of the processing cylinder 3. A second spring 624 is welded and fixed to the fixing plate 623. A first clamping rod 625 is welded and fixed to the second spring 624. The first clamping rod 625 passes through It is slidably connected to the fixed plate 623, and the end of the first clamping rod 625 is clamped in the first clamping groove 622. The first clamping groove 622 is symmetrically distributed on both sides of the first sealing plate 621. The first clamping groove 622 corresponds to the first clamping rod 625 one by one. The first sealing block 620 is made of rubber. After the mounting tube 608 is exchanged, the staff has sufficient time to disassemble the first sealing plate 621 and replace and clean the replaced dehumidification screen plate 611 and filter screen plate 612, thereby increasing the convenience of use of the detection device.

[0029] In this embodiment, the support rod 701 is welded and fixed in the detection cylinder 1, and a mounting box 702 is welded and fixed on the support rod 701, and a servo motor 703 is welded and fixed in the mounting box 702. A first turntable 704 and a limit plate 705 are welded and fixed on the output shaft of the servo motor 703, and a guide rod 706 is welded and fixed on the first turntable 704. The driving shaft 707 is rotatably connected to the mounting box 702, and a second turntable 708 and a first bevel gear 8 are welded and fixed on the driving shaft 707. A guide groove 709 is provided on the second turntable 708, and the side end surface of the second turntable 708 is arc-shaped. The second turntable 708 is in contact with the limit plate 705, and four guide grooves 709 are provided. The four guide grooves 709 are distributed at equal angles on the second turntable 708, and the intercepting cylinder 711 is in contact with the inner wall of the detection cylinder 1, and the intercepting grooves 712 are symmetrically distributed on On both sides of the intercepting cylinder 711, the depth of the intercepting groove 712 is less than the width of the baffle 713. Two groups of baffles 713 are provided, and each group of baffles 713 is provided with two. The two groups of baffles 713 are symmetrically distributed on both sides of the inside of the detection cylinder 1. The two baffles 713 in each group are symmetrically distributed on both sides of the intercepting cylinder 711. The intercepting cylinder 711 is fitted with the baffle 713. Under the continuous rotation of the first turntable 704, combined with the guide rod 706 and the four guide grooves 709 on the second turntable 708, the driving shaft 707 can be driven to rotate intermittently by 90°, and then the waste gas can be automatically intercepted through the intercepting grooves 712 on both sides of the intercepting cylinder 711, and the intercepted waste gas can be moved to the detection head 23 in the fixed pipe 28 for stop detection in conjunction with the baffle 713, which effectively improves the accuracy of the detection results of the VOC waste gas content in the industrial waste gas.

[0030] In this embodiment, the first bevel gear 8 is meshed with the second bevel gear 9, the second bevel gear 9 is welded and fixed with a driven shaft 10, the driven shaft 10 is welded and fixed with a second support plate 11, the second support plate 11 is rotatably connected to the first connecting tube 2 through a bearing, the bottom end surface of the second support plate 11 is welded and fixed with a third spring 12, the bottom end of the third spring 12 is welded and fixed with a connecting plate 13, the top surface of the connecting plate 13 is welded and fixed with a push rod 14, the push rod 14 is slidably connected to the second support plate 11, the top end of the push rod 14 is welded and fixed with a limiting block 15, the limiting block 15 is snap-fitted and connected in the limiting groove 618, the limiting grooves 618 are distributed at equal angles at the bottom of the first support plate 610, the limiting grooves 618 correspond one to one to the limiting blocks 15, and the limiting grooves 618 correspond one to one to the limiting blocks 15. 15 are both in the shape of a truncated cone, and the friction force between the limit groove 618 and the limit block 15 is less than the elastic force of the third spring 12. The second support plate 11 and the first support plate 610 are both large-aperture mesh plates. During the rotation of the active shaft 707, the first bevel gear 8 and the second bevel gear 9 can drive the second support plate 11 on the driven shaft 10 to rotate stably, and the limit of the limit block 15 and the limit groove 618 can be used to move the first support plate 610 to rotate stably, thereby driving the filter plate 612 on the dehumidification mesh plate 611 to rotate automatically. At this time, under the action of the rubber scraper 617, the dust and impurities filtered on the surface of the filter plate 612 can be moved to the collection tank 615 for automatic collection, thereby avoiding the problem of clogging of the filter plate 612 during operation that affects the filtering effect.

[0031] In this embodiment, a protective frame 16 is welded and fixed on the detection cylinder 1, and the protective frames 16 are symmetrically distributed on both sides of the detection cylinder 1. The protective frame 16 is made of transparent material. Fixed tubes 28 are fixedly connected to both sides of the detection cylinder 1, and fourth springs 17 are welded and fixed on both sides of the protective frame 16. A second clamping rod 18 is welded and fixed on the fourth spring 17. The second clamping rod 18 is slidingly connected to the protective frame 16 with a limited position. A cover plate 19 is slidingly connected to the protective frame 16, and a sealing gasket 20 is fixedly connected to the cover plate 19. Second clamping grooves 21 are provided on both sides of the cover plate 19 and the sealing gasket 20. The end of the second clamping rod 18 is clamped and connected to the second clamping groove 21. The second clamping rod 18 and the second clamping groove 21 can be used to conveniently disassemble and assemble the VOC detector 22 on the cover plate 19, thereby ensuring the convenience of subsequent inspection and maintenance of the VOC detector 22.

[0032] In this embodiment, a VOC detector 22 is bolted to the cover plate 19, and a detection head 23 is installed on the VOC detector 22. The detection head 23 is arranged in a fixed tube 28. A second sealing plate 24 is fixedly connected to the detection head 23, and a second sealing block 25 and a magnetic frame 26 are fixedly connected to the second sealing plate 24. The second sealing block 25 is made of rubber and is snap-connected in the fixed tube 28. The magnetic frames 26 are symmetrically distributed on both sides of the second sealing plate 24. A storage net frame 27 is magnetically adsorbed and connected in the magnetic frame 26. A desiccant is provided in the storage net frame 27. Combined with the protective frame 16, the VOC detector 22 can be stably sealed and protected. At the same time, under the action of the desiccant inside the storage net frame 27, the VOC detector 22 can be stably dehumidified and protected.

[0033] It should be noted that the present invention is a VOC detection device in industrial waste gas. First, the exhaust pipe 30 on the second connecting pipe 4 and the exhaust pipe 30 at the upper end of the third connecting pipe 29 are both connected to the waste gas treatment equipment. After purification, the industrial waste gas can be transported to the installation cylinder 608 in the treatment cylinder 3 through the exhaust pipe 30 on the second connecting pipe 4. After filtering by the filter plate 612 in the installation cylinder 608 and dehumidification by the dehumidification mesh plate 611, the waste gas can be transported to the treatment cylinder 3 through the first connecting pipe 2 to detect the VOC gas content in the waste gas. If the VOC gas content in the waste gas exceeds the standard, it means that the efficiency of the front-end waste gas treatment equipment is insufficient and needs to be improved. Subsequently, the industrial waste gas with excessive VOC gas content is subjected to secondary purification treatment by the back-end waste gas treatment equipment to avoid air pollution after discharge.

[0034] When the second turntable 708 is stopped, the groove on the limit plate 705 is aligned with the second turntable 708, so it will not block the rotation of the second turntable 708. When the guide rod 706 moves out of the guide groove 709, the limit plate 705 rotates to fit the second turntable 708 and limits the second turntable 708 to prevent the second turntable 708 from stopping when rotating. The guide rod 706 is displaced or offset during the interval to ensure the stability of the subsequent intermittent rotation. Then the guide rod 706 moves to the next guide groove 709 on the second turntable 708, and the second turntable 708 is rotated clockwise again, and so on and so forth, which can drive the second turntable 708 to automatically rotate intermittently, and each time it rotates 90°; under the 90° intermittent rotation of the second turntable 708, the fixed rod 710 on the active shaft 707 can drive the intercepting tube 711 to move synchronously, so that under the intermittent rotation of the intercepting tube 711, the intercepting groove 712 can be driven to automatically move to the baffle 713, and then under the continued movement of the intercepting tube 711, the intercepting groove 712 can be driven to move away from the baffle 713, and so on and so forth.

[0035] When the intercepting groove 712 moves to the baffle 713, the exhaust gas that is about to flow from the intercepting groove 712 is intercepted and blocked by the baffles 713 on both sides. At the same time, the intercepted exhaust gas is automatically moved to the fixed pipe 28 and stays at the detection head 23 in the fixed pipe 28. At this time, under the action of the VOC detector 22, combined with the detection head 23, the stopped exhaust gas can be detected, which effectively improves the accuracy of the detection results of the VOC exhaust gas content in the industrial exhaust gas, avoids the problem of inaccurate detection results caused by excessive exhaust gas flow rate, and avoids the problem of easy damage to the detection head 23 caused by air flow impact; then, under the continued rotation of the intercepting tube 711, the intercepting groove 712 can be driven to move away from the baffle 713. At this time, the exhaust gas continues to circulate and is transported to the subsequent exhaust gas treatment equipment through the exhaust pipe 30 at the third connecting pipe 29. In this way, the detection of VOC in industrial exhaust gas can be automatically and accurately realized.

[0036] And during the rotation of the driving shaft 707, the engagement of the first bevel gear 8 and the second bevel gear 9 can drive the second support plate 11 on the driven shaft 10 to perform synchronous intermittent motion. Since the friction between the limit groove 618 and the limit block 15 is less than the elastic force of the third spring 12, under the rotation of the second support plate 11, the limit block 15 on the push rod 14 can be used to move the first support plate 610 for synchronous motion. At this time, under the limiting action of the second positioning rod 613 and the second positioning groove 614, the dehumidification screen plate 611 and the filter screen plate 612 can be driven to rotate synchronously. During the rotation of the filter screen plate 612, the top surface of the filter screen plate 612 is in contact with the rubber scraper 617, and the rubber scraper 617 can move the dust and impurities filtered on the surface of the filter screen plate 612 to the collection tank 615 for automatic collection, thereby avoiding the problem of clogging of the filter screen plate 612 during operation that affects the filtering effect, thereby realizing automatic cleaning of the filter screen plate 612.

[0037] After the detection device has been working for a long time, when the dehumidification screen plate 611 and the filter screen plate 612 need to be replaced, the staff only needs to pull the second connecting plate 604 upwards to drive the first positioning rod 605 to move out of the first positioning groove 606 and release the locking limit of the first connecting plate 602. At this time, the first connecting plate 602 can be rotated by the rotating shaft 601, and the center plate 607 can be used to drive the installation cylinders 608 on both sides to exchange positions. After the installation cylinders 608 on both sides have exchanged positions, the staff can loosen the second connecting plate 604. At this time, the two first positioning rods 605 are also moved. The positions of the rows are exchanged, and under the elastic action of the first spring 603, the first positioning rod 605 is driven by the second connecting plate 604 to engage with the first positioning groove 606 again, thereby realizing the engagement limit of the first connecting plate 602, preventing the rotating shaft 601 from rotating, and ensuring the stability of the working state of the mounting cylinders 608 on both sides. At this time, the mounting cylinder 608 on the other side is replaced between the first connecting pipe 2 and the second connecting pipe 4, and the exhaust gas can be continued to be filtered and dehumidified, ensuring the stability of subsequent detection work, and the exchange time of the mounting cylinders 608 on both sides is extremely short, which greatly reduces the downtime of the exhaust emission equipment.

[0038] After use, the dehumidification mesh plate 611 and the filter plate 612 are moved to the through groove 619 along with the installation tube 608. At this time, the staff only needs to pull out the first clamping rod 625 on the fixing plate 623 to make it move out of the first clamping groove 622 at the upper end of the first sealing plate 621, so as to conveniently complete the disassembly of the first sealing plate 621 and the first sealing block 620. Then the staff can take out the dehumidification mesh plate 611 and the filter plate 612 after use, which is convenient for subsequent cleaning and replacement. The replaced dehumidification mesh plate 611 and the filter plate 612 can be placed in the installation tube 608 and wait for the next replacement work.

[0039] When the first locking rod 625 is pulled outwards, the first sealing block 620 on the first sealing plate 621 is engaged with the through groove 619, and the first locking rod 625 is released. At this time, under the elastic action of the second spring 624, the first locking rod 625 can be driven to rotate and engage with the first locking groove 622, completing the engagement and fixing of the first sealing plate 621, and achieving the sealing closure of the through groove 619. In addition, during the replacement process of the installation cylinder 608, it is only necessary to increase the rotational force on the rotating shaft 601 to make it greater than the elastic force of the third spring 12. Under the guidance of the inclined surface of the end of the limit block 15, the movement of the installation cylinder 608 can push the limit block 15 to move downward automatically until the installation cylinder 608 completes the position exchange. At this time, even if the limit block 15 is not inserted into the limit groove 618, under the subsequent rotation of the second supporting plate 11, each limit block 15 can still be driven to automatically insert into the limit groove 618, thereby ensuring the stability of the subsequent tossing operation.

[0040] Through the same operation as above, under the cooperation of the second clamping rod 18 and the second clamping slot 21, the cover plate 19 can be conveniently disassembled and assembled, and then the VOC detector 22 can be conveniently disassembled and assembled, thereby ensuring the convenience of subsequent inspection and maintenance of the VOC detector 22; and combined with the sealing gasket 20 on the upper end of the cover plate 19 and the protective frame 16, the VOC detector 22 can be stably sealed and protected; at the same time, under the action of the desiccant inside the storage network frame 27, the VOC detector 22 can be stably dehumidified and protected, avoiding the problem that the VOC detector 22 is easily damaged by moisture when working in a humid environment. When the cover plate 19 is removed, the storage network frame 27 can be conveniently disassembled and assembled under the magnetic action of the magnetic frame 26, and the desiccant can be conveniently replaced; and when the cover plate 19 is engaged and installed, the second sealing block 25 on the second sealing plate 24 can automatically and stably close and seal the fixed pipe 28 to prevent exhaust gas leakage and ensure the stability of the detection work.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A VOC detection device in industrial waste gas, characterized in that: The invention comprises a detection cylinder (1), one end of the detection cylinder (1) is fixedly connected to a first connecting tube (2), the top of the first connecting tube (2) is fixedly connected to a processing cylinder (3), a high-efficiency processing component (6) is installed in the processing cylinder (3), a cut-off detection component (7) is installed in the detection cylinder (1), the high-efficiency processing component (6) comprises a rotating shaft (601), the rotating shaft (601) is rotatably connected to the center of the top of the processing cylinder (3), the top of the processing cylinder (3) is provided with a first positioning groove (606), the bottom end of the rotating shaft (601) is welded and fixed with a center plate (607), and a mounting plate (607) is welded and fixed on the center plate (607). The mounting cylinder (608) is provided with a first supporting plate (610) rotatably connected to a bearing in the mounting cylinder (608), a dehumidifying screen plate (611) and a filter screen plate (612) are slidably connected in the mounting cylinder (608), a limiting groove (618) is provided at the bottom of the first supporting plate (610), the interception detection assembly (7) comprises a support rod (701) and a driving shaft (707), a fixing rod (710) is welded and fixed to the driving shaft (707), an interception cylinder (711) is welded and fixed to the fixing rod (710), an interception groove (712) is provided through the interception cylinder (711), and a baffle (713) is welded and fixed in the detection cylinder (1).

2. The VOC detection device in industrial waste gas according to claim 1, characterized in that: The top of the treatment cylinder (3) is fixedly connected to a second connecting pipe (4), a reinforcing rod (5) is welded and fixed to the treatment cylinder (3), one end of the reinforcing rod (5) is welded and fixed to the second connecting pipe (4), and the other end of the reinforcing rod (5) is welded and fixed to the first connecting pipe (2), the other end of the detection cylinder (1) is fixedly connected to a third connecting pipe (29), the second connecting pipe (4) and the third connecting pipe (29) are both flange-connected to an exhaust pipe (30), and the second connecting pipe (4) is located directly above the first connecting pipe (2).

3. The VOC detection device in industrial waste gas according to claim 2, characterized in that: A first connecting plate (602) is welded and fixed to the top end of the rotating shaft (601), a first spring (603) is welded and fixed to the top end surface of the first connecting plate (602), a second connecting plate (604) is welded and fixed to the top end surface of the first spring (603), a first positioning rod (605) is welded and fixed to the bottom end surface of the second connecting plate (604), the first positioning rod (605) is slidably connected to the first connecting plate (602), the bottom of the first positioning rod (605) is snap-connected in the first positioning groove (606), the first positioning rod (605) is symmetrically distributed on both sides of the second connecting plate (604), the first positioning groove (606) is symmetrically distributed on both sides of the top of the processing cylinder (3), and the upper and lower ends of the mounting cylinder (608) are fixedly connected with sealing rings (609).

4. The VOC detection device in industrial waste gas according to claim 3, characterized in that: The top surface of the first supporting plate (610) and the top surface of the dehumidifying mesh plate (611) are both fixedly connected to a second positioning rod (613); the bottom of the dehumidifying mesh plate (611) and the bottom of the filter plate (612) are both provided with a second positioning groove (614); the top of the filter plate (612) is provided with a collecting groove (615); a grabbing rod (616) is welded and fixed to the filter plate (612); a rubber scraper rod (617) is fixedly connected to the inside of the second connecting pipe (4); the bottom end surface of the rubber scraper rod (617) is in contact with the top surface of the filter plate (612).

5. The VOC detection device in industrial waste gas according to claim 4, characterized in that: A through groove (619) is provided on the top of the treatment cylinder (3), and the diameter of the through groove (619) is equal to the inner diameter of the mounting cylinder (608). A first sealing block (620) is connected in a snap-fit ​​manner in the through groove (619). A first sealing plate (621) is fixedly connected to the top of the first sealing block (620), and a first slot (622) is provided on the side of the first sealing plate (621). A fixing plate (623) is welded and fixed on the top surface of the treatment cylinder (3), and a fixing plate (623) is welded on the fixing plate (623). A second spring (624) is fixed, and a first clamping rod (625) is welded and fixed on the second spring (624). The first clamping rod (625) is slidably connected to the fixed plate (623). The end of the first clamping rod (625) is clamped and connected in the first clamping groove (622). The first clamping groove (622) is symmetrically distributed on both sides of the first sealing plate (621). The first clamping groove (622) corresponds to the first clamping rod (625) one by one. The first sealing block (620) is made of rubber.

6. The VOC detection device in industrial waste gas according to claim 1, characterized in that: The support rod (701) is welded and fixed in the detection cylinder (1); a mounting box (702) is welded and fixed on the support rod (701); a servo motor (703) is welded and fixed in the mounting box (702); a first turntable (704) and a limit plate (705) are welded and fixed on the output shaft of the servo motor (703); a guide rod (706) is welded and fixed on the first turntable (704); the driving shaft (707) is rotatably connected to the mounting box (702); a second turntable (708) and a first bevel gear (8) are welded and fixed on the driving shaft (707); a guide groove (709) is provided on the second turntable (708); four guide grooves (709) are provided, and the four guide grooves (709) are distributed at equal angles on the second turntable (708).

7. The VOC detection device in industrial waste gas according to claim 6, characterized in that: The intercepting tube (711) is fitted with the inner wall of the detection tube (1); the intercepting grooves (712) are symmetrically distributed on both sides of the intercepting tube (711); the depth of the intercepting grooves (712) is smaller than the width of the baffles (713); two groups of baffles (713) are provided, each group of baffles (713) is provided with two baffles; the two groups of baffles (713) are symmetrically distributed on both sides of the interior of the detection tube (1); the two baffles (713) of each group are symmetrically distributed on both sides of the intercepting tube (711); and the intercepting tube (711) is fitted with the baffles (713).

8. The VOC detection device in industrial waste gas according to claim 6, characterized in that: The first bevel gear (8) is meshedly connected to a second bevel gear (9), a driven shaft (10) is welded and fixed to the second bevel gear (9), a second support plate (11) is welded and fixed to the driven shaft (10), the second support plate (11) is rotatably connected to the first connecting tube (2) via a bearing, a third spring (12) is welded and fixed to the bottom end surface of the second support plate (11), a connecting plate (13) is welded and fixed to the bottom end of the third spring (12), and the connecting plate (13) is welded and fixed to the bottom end surface of the third spring (12). ) is welded and fixed on the top surface of the first support plate (610), and a limiting block (15) is welded and fixed on the top end of the push rod (14). The limiting block (15) is snap-fitted and connected in the limiting groove (618). The limiting grooves (618) are distributed at equal angles on the bottom of the first support plate (610). The limiting grooves (618) correspond to the limiting blocks (15) one by one. The limiting grooves (618) and the limiting blocks (15) are both truncated cone-shaped. The second support plate (11) and the first support plate (610) are both large-aperture mesh plates.

9. The VOC detection device in industrial waste gas according to claim 1, characterized in that: A protective frame (16) is welded and fixed on the detection cylinder (1), and the protective frame (16) is symmetrically distributed on both sides of the detection cylinder (1). The protective frame (16) is made of transparent material. A fixing tube (28) is fixedly connected to both sides of the detection cylinder (1). A fourth spring (17) is welded and fixed on both sides of the protective frame (16). A second clamping rod (18) is welded and fixed on the fourth spring (17). The second clamping rod (18) is limitedly slidably connected in the protective frame (16). A cover plate (19) is slidably connected in the protective frame (16). A sealing gasket (20) is fixedly connected to the cover plate (19). Second clamping grooves (21) are provided on both sides of the cover plate (19) and the sealing gasket (20), and the end of the second clamping rod (18) is clamped and connected in the second clamping groove (21).

10. The VOC detection device in industrial waste gas according to claim 9, characterized in that: A VOC detector (22) is bolted to the cover plate (19), a detection head (23) is installed on the VOC detector (22), the detection head (23) is arranged in a fixed tube (28), a second sealing plate (24) is fixedly connected to the detection head (23), a second sealing block (25) and a magnetic frame (26) are fixedly connected to the second sealing plate (24), the second sealing block (25) is made of rubber, the second sealing block (25) is snap-connected in the fixed tube (28), the magnetic frames (26) are symmetrically distributed on both sides of the second sealing plate (24), a storage net frame (27) is magnetically adsorbed and connected in the magnetic frame (26), and a desiccant is arranged in the storage net frame (27).

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