Waste gas sampling device for industrial waste gas detection

Abstract

The invention discloses a waste gas sampling device for industrial waste gas detection, and relates to the technical field of waste gas sampling devices for industrial waste gas detection, the waste gas sampling device comprises a storage tank, a motor is fixedly mounted at the top of the storage tank, a rotating shaft is fixedly mounted at the output end of the motor, and a detection device is arranged on the outer wall of the storage tank. An exhaust hole is formed in the outer wall of the storage tank, a rotating ring is arranged at the top of the storage tank, an air extraction valve is fixedly installed at the bottom of the rotating ring, an air extraction filter pipe is fixedly installed at an air inlet of the air extraction valve, an air inlet pipe is fixedly installed at an air outlet of the air extraction valve, and a replacement device is further arranged at the top of the storage tank. The pushing rod moves to push the clamping plate to move so as to release the fixation of the air exhaust filter pipe, and the air exhaust filter pipe is replaced before the gas is collected, so that the influence on the subsequent detection result caused by the existence of residual waste gas components in the previous sampling when the waste gas is collected and detected can be effectively avoided.

Description

Technical Field

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

[0002] Industrial waste gas refers to the polluting gases generated during fuel combustion and production processes within the factory area of an enterprise. These waste gases include carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, lead and mercury sulfate, beryllium, smoke and industrial dust. Discharge into the atmosphere will pollute the air. These substances enter the human body through different respiratory tracts and endanger human health. In order to reduce the harm caused by industrial waste gas, people need to analyze or detect the composition of the waste gas. Therefore, a waste gas sampling device for industrial waste gas detection is proposed.

[0003] Patent publication number CN218035925U relates to the technical field of waste gas sampling devices for industrial waste gas detection. The patent includes a portable sampling installation box, which houses a sampling assembly equipped with a telescopic structure. This patent, pertaining to waste gas detection technology, specifically relates to a waste gas sampling device for industrial waste gas detection. The inclusion of several sampling assemblies increases sampling diversity, improves waste gas sampling efficiency, and reduces the potential for waste gas pollution. Furthermore, the inclusion of a telescopic structure, shock-absorbing springs, and protective plates increases the device's safety and flexibility, enhancing the user experience.

[0004] The above patent increases the sampling diversity of the device by setting up several sampling components, improves the working efficiency of exhaust gas sampling, and reduces the possibility of exhaust gas pollution. However, when sampling exhaust gas, impurities from the previous sampling may remain inside the exhaust filter tube, and these residual impurities may affect the current exhaust gas sampling. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a waste gas sampling device for industrial waste gas detection, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A waste gas sampling device for industrial waste gas detection, comprising a storage tank, a motor fixedly mounted on the top of the storage tank, a rotating shaft fixedly mounted on the output end of the motor, a detection device provided on the outer wall of the storage tank, an exhaust hole opened on the outer wall of the storage tank, a rotating ring provided on the top of the storage tank, an exhaust valve fixedly mounted on the bottom of the rotating ring, an exhaust filter tube fixedly mounted on the air inlet of the exhaust valve, an air inlet pipe fixedly mounted on the air outlet of the exhaust valve, and a replacement device further provided on the top of the storage tank; The replacement device includes a pressing plate, a No. 1 connecting rod, a push plate, a pushing rod and a clamping plate. The pressing plate slides through the top of the storage tank, and the push plate is slidably installed on the top of the storage tank. One end of the No. 1 connecting rod is rotatably installed on the side of the pressing plate close to the push plate, and the other end of the No. 1 connecting rod is rotatably installed on the side of the push plate close to the pressing plate. The pushing rod is slidably installed on the top of the rotating ring, and the clamping plate is slidably installed on the top of the rotating ring. The movement of the push rod will push the clamping plate to move and release the fixation of the exhaust filter tube. Replacing the exhaust filter tube before collecting gas can effectively avoid the presence of residual exhaust gas components from the previous sampling when collecting and testing the exhaust gas, which will affect the subsequent test results.

[0007] According to the above technical solution, the replacement device also includes a circular ring, a No. 2 connecting rod, an elastic telescopic rod, a card plate, a chuck, a fixed rod and a circular plate. The circular ring is slidably installed on the bottom of the pressing plate, the elastic telescopic rod is fixedly installed on the bottom of the rotating ring, one end of the No. 2 connecting rod is rotatably installed on the bottom of the circular ring, and the other end of the No. 2 connecting rod is rotatably installed on the top of the elastic telescopic rod, the card plate is fixedly installed on the side of the elastic telescopic rod close to the rotating shaft, the chuck is fixedly installed on the circumferential surface of the rotating shaft, the fixed rod is slidably installed on the top of the storage tank, and the circular plate is fixedly installed on the inner wall of the storage tank. The retraction of the elastic telescopic rod will pull the card plate to move away from the rotating shaft, and the engagement between the card plate and the chuck will be released, thereby avoiding the influence of the rotating ring rotation caused by the rotation of the rotating shaft on the replacement of the exhaust filter tube, making it impossible to assemble the exhaust filter tube well, increasing the working time of the staff and reducing work efficiency.

[0008] According to the above technical solution, a filter screen is provided on the inner wall of the exhaust filter tube, and a slope is provided on the side of the fixed rod close to the pressing plate. The slope is provided to facilitate the pressing plate to push the fixed rod to move. A No. 1 spring is provided between the fixed rod and the storage tank. The No. 1 spring is provided to drive the fixed rod back to its original position. A No. 2 spring is provided between the push plate and the storage tank. The No. 2 spring is provided to drive the push plate back to its original position. A slope is provided on the side of the push rod close to the clamping plate. The slope is provided to facilitate the push rod to push the clamping plate to move. A No. 3 spring is provided between the clamping plate and the storage tank. The No. 3 spring is provided to drive the clamping plate back to its original position. The chuck and the clamping plate are interlocked with each other.

[0009] According to the above technical solution, the storage tank is further provided with an intermittent device for controlling the entry of exhaust gas and a protective device for protecting the discharge of purified air. The intermittent device includes a fixed column, an upper conical block, a lower conical block, a sliding rod, a No. 1 telescopic block, a purifier, a No. 1 pressure block, a No. 2 pressure block and a blocking plate. A circular hole is opened at the bottom of the circular plate, a purifier is fixedly installed on the top of the circular plate, the fixed column is fixedly installed on the top of the circular plate, the upper conical block is fixedly installed on the top of the fixed column, the lower conical block is slidably installed on the circumferential surface of the fixed column, and the sliding rod slides through the circular plate. At the top, the No. 1 telescopic block is slidably installed on the side of the sliding rod close to the fixed column, the No. 1 pressure block is fixedly installed on the circumferential surface of the intake pipe, the No. 2 pressure block is fixedly installed on the circumferential surface of the intake pipe, and the blocking plate is fixedly installed at the bottom of the sliding rod. The sliding rod drives the No. 1 telescopic block back to its original position and will not be blocked by the upper conical block. The sliding rod will drive the blocking plate to seal the circular hole, so that the exhaust gas is stored at the bottom of the circular plate, avoiding the exhaust gas from being discharged through the circular hole all the time, making the air pressure at the top of the circular plate greater than the air pressure at the bottom of the circular plate, resulting in gas backflow or the exhaust gas cannot be discharged well, thereby reducing the exhaust gas purification efficiency.

[0010] According to the above technical solution, the intermittent device also includes a pressure rod No. 1, a baffle No. 1, a pressure rod No. 2, a fixed block, a limit block and a telescopic block No. 2. The baffle No. 1 is slidably installed on the inner wall of the storage tank, the pressure rod No. 1 is fixedly installed on the bottom of the baffle No. 1, the fixed block is fixedly installed on the inner wall of the storage tank, the pressure rod No. 2 slides through the bottom of the fixed block, the limit block is slidably installed on the top of the fixed block, and the telescopic block No. 2 is slidably installed on the side of the baffle No. 1 close to the fixed block. The baffle No. 1 will drive the telescopic block No. 2 to return to its original position to block the exhaust hole, so that the purified gas continues to be collected inside the storage tank, so that the air pressure inside the storage tank is greater than the external air pressure, to avoid the gas inside the storage tank from being discharged all the time. The continuous discharge of gas may make the air pressure inside and outside the storage tank consistent, which may cause external exhaust gas to enter the storage tank and may contaminate the purified gas.

[0011] According to the above technical solution, the position of the No. 1 pressure block is higher than the No. 2 pressure block, and a No. 4 spring is provided between the sliding rod and the circular plate. The No. 4 spring is provided to drive the sliding rod back to its original position, and a No. 5 spring is provided between the sliding rod and the No. 1 telescopic block. The No. 5 spring is provided to drive the No. 1 telescopic block back to its original position, and an inclined surface is provided on the side of the No. 1 telescopic block close to the fixed column, and a No. 6 spring is provided between the No. 2 telescopic block and the No. 1 baffle. The No. 6 spring is provided to drive the No. 2 telescopic block back to its original position, and an inclined surface is provided on the side of the No. 2 telescopic block close to the fixed block, and a No. 7 spring is provided between the limit block and the fixed block. The No. 7 spring is provided to drive the limit block back to its original position.

[0012] According to the above technical solution, the protection device includes a fixing frame, a fan blade, a ratchet, a ratchet, a second baffle, a third baffle, a fixing frame, a push rod and a fixing pin. The fixing frame is fixedly mounted on the side of the fixing block away from the exhaust hole, the fan blade is rotatably mounted on the inner wall of the fixing frame, the ratchet is fixedly mounted on the circumferential surface of the fan blade rotating shaft, the ratchet is slidably mounted on the inner wall of the storage tank, the second baffle is fixedly mounted on the side of the ratchet close to the fan blade, one end of the push rod is rotatably mounted on the side of the second telescopic block close to the first baffle, and the other end of the push rod is slidably mounted on the side of the first baffle close to the second telescopic block. The fixed frame is fixedly installed on the outer wall of the exhaust hole, the No. 3 baffle is rotatably installed on the inner wall of the fixed frame, and the fixed pin is rotatably installed on the side of the fixed frame away from the storage tank. The fixed pin is connected to the rotating shaft of the fan blade by a wire rope. When the fan blade stops rotating, the ratchet will stop pushing the ratchet teeth, and the ratchet teeth will slide downward due to their own gravity. The downward sliding of the ratchet teeth will drive the No. 2 baffle to move downward to seal the exhaust hole. When the fan blades stop rotating, it means that the air pressure inside and outside the storage tank is about to be consistent. The consistent air pressure inside and outside the storage tank may cause external exhaust gas to enter the interior of the storage tank, which may contaminate the purified gas.

[0013] According to the above technical solution, a No. 1 torsion spring is provided between the No. 3 baffle and the fixed frame. The No. 1 torsion spring is provided to drive the No. 3 baffle to rotate and seal the exhaust hole. A No. 2 torsion spring is provided between the fixed pin and the fixed frame. The No. 2 torsion spring is provided to drive the fixed pin back to its original position. A limiting groove is provided on the side of the No. 3 baffle close to the fixed pin, and the fixed pin is in contact with the inner wall of the limiting groove.

[0014] The present invention provides an exhaust gas sampling device for industrial exhaust gas detection. It has the following beneficial effects: (1) In this invention, when replacing the exhaust filter tube, the pressing plate is pressed and slid downward. The downward sliding of the pressing plate will push the No. 1 connecting rod to move. The movement of the No. 1 connecting rod will push the push plate to slide. The sliding of the push plate will push the push rod to slide. The movement of the push rod will push the clamping plate to move and release the fixation of the exhaust filter tube. Replacing the exhaust filter tube before collecting gas can effectively avoid the presence of residual exhaust gas components from the previous sampling when collecting and testing the exhaust gas, which will affect the subsequent test results. The retraction of the elastic telescopic rod will pull the card plate to move away from the rotating shaft, and the engagement between the card plate and the chuck will be released, avoiding the rotation of the rotating ring caused by the rotation of the rotating shaft when replacing the exhaust filter tube, which will affect the replacement of the exhaust filter tube, making it impossible to assemble the exhaust filter tube well, increasing the working time of the staff and reducing work efficiency.

[0015] (2) In this invention, when the lower conical block contacts the upper conical block, it will block the lower conical block from continuing to move. Then, the No. 1 telescopic block will slide on the conical surface of the lower conical block, and the No. 1 telescopic block will slide toward the inside of the sliding rod. At this time, the sliding rod drives the No. 1 telescopic block back to its original position and will not be blocked by the upper conical block. Then, the sliding rod will drive the blocking plate to seal the circular hole, so that the exhaust gas is stored at the bottom of the circular plate, avoiding the exhaust gas from being discharged through the circular hole all the time, making the air pressure at the top of the circular plate greater than the air pressure at the bottom of the circular plate, resulting in gas backflow or the exhaust gas cannot be discharged well, thereby reducing the exhaust gas purification efficiency.

[0016] (3) In this invention, the downward movement of the No. 2 pressure rod will release the limit on the limit block, and the limit block will be pulled by the No. 7 spring to slide in the direction away from the No. 2 telescopic block, and the limit of the No. 2 telescopic block will be released. The No. 1 baffle will drive the No. 2 telescopic block back to its original position to block the exhaust hole, so that the purified gas continues to be collected inside the storage tank, making the air pressure inside the storage tank greater than the air pressure outside, and avoiding the gas inside the storage tank from being discharged all the time. If the gas is discharged all the time, the air pressure inside and outside the storage tank may be consistent, which may cause the external exhaust gas to enter the storage tank and pollute the purified gas.

[0017] (4) When the gas inside the storage tank is exhausted, the fan blades will stop rotating. When the fan blades stop rotating, the ratchet will stop pushing the ratchet teeth, and the ratchet teeth will slide downward due to their own gravity. The downward sliding of the ratchet teeth will drive the second baffle to move downward to seal the exhaust hole. When the fan blades stop rotating, it means that the air pressure inside and outside the storage tank is about to be consistent. The consistent air pressure inside and outside the storage tank may cause external exhaust gas to enter the storage tank, which may contaminate the purified gas.

[0018] (5) Rotating the fixing pin in the direction away from the No. 3 baffle will release the limit on the No. 3 baffle, and the No. 3 baffle will be driven by the No. 1 torsion spring to rotate toward the exhaust hole to strengthen the sealing of the exhaust hole, so as to prevent the exhaust gas from flowing back into the storage tank. The external exhaust gas entering the storage tank may contaminate the purified gas, and the subsequent gas discharged from the storage tank will be contaminated, which will affect the purification and emission of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the position structure of the ring and the second connecting rod of the present invention; Figure 3 This is a schematic diagram of the position structure of the push rod and the clamping plate of the present invention; Figure 4 This is a schematic diagram of the position structure of the clamping plate and the chuck of the present invention; Figure 5 This is a schematic diagram of the position structure of the No. 1 pressing block and the air intake pipe of the present invention; Figure 6 This is a schematic diagram of the purifier and circular plate position structure of the present invention; Figure 7 This is a schematic diagram of the position structure of the sliding rod and the rotating plate of the present invention; Figure 8 This is a schematic diagram of the position structure of the first pressure rod and the first baffle of the present invention; Figure 9 This is a schematic diagram of the position structure of the third baffle and the fixing pin of the present invention.

[0020] In the figure: 1. Storage tank; 2. Motor; 3. Detection device; 4. Rotating shaft; 5. Exhaust hole; 6. Air extraction valve; 7. Air inlet pipe; 8. Air extraction filter pipe; 9. Pressing plate; 10. Connecting rod No. 1; 11. Push plate; 12. Push rod; 13. Clamping plate; 14. Ring; 15. Connecting rod No. 2; 16. Elastic telescopic rod; 17. Clamping plate; 18. Clamping plate; 19. Fixing rod; 191. Circular plate; 21. Fixing column; 22. Upper conical block; 23. Lower conical block; 2 4. Sliding rod; 25. Telescopic block No. 1; 26. Purifier; 27. Pressure block No. 1; 28. Pressure block No. 2; 29. Blocking plate; 291. Pressure rod No. 1; 292. Baffle No. 1; 293. Pressure rod No. 2; 294. Fixed block; 295. Limit block; 296. Telescopic block No. 2; 30. Fixed frame; 31. Fan blade; 32. Ratchet; 33. Ratchet; 34. Baffle No. 2; 35. Baffle No. 3; 36. Fixed frame; 37. Push rod; 38. Fixing pin. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] See also Figures 1-9 One embodiment of the present invention is: a waste gas sampling device for industrial waste gas detection, including a storage tank 1, a motor 2 is fixedly installed on the top of the storage tank 1, a rotating shaft 4 is fixedly installed on the output end of the motor 2, a detection device 3 is provided on the outer wall of the storage tank 1, an exhaust hole 5 is opened on the outer wall of the storage tank 1, a rotating ring is provided on the top of the storage tank 1, an exhaust valve 6 is fixedly installed on the bottom of the rotating ring, an exhaust filter tube 8 is fixedly installed on the air inlet of the exhaust valve 6, an air inlet pipe 7 is fixedly installed on the air outlet of the exhaust valve 6, and a replacement device is also provided on the top of the storage tank 1; The replacement device includes a pressing plate 9, a No. 1 connecting rod 10, a push plate 11, a pushing rod 12 and a clamping plate 13. The pressing plate 9 slides through the top of the storage tank 1, and the push plate 11 is slidably installed on the top of the storage tank 1. One end of the No. 1 connecting rod 10 is rotatably installed on the side of the pressing plate 9 close to the push plate 11, and the other end of the No. 1 connecting rod 10 is rotatably installed on the side of the push plate 11 close to the pressing plate 9. The pushing rod 12 is slidably installed on the top of the rotating ring, and the clamping plate 13 is slidably installed on the top of the rotating ring. The movement of the push rod 12 will push the clamping plate 13 to move to release the fixation of the exhaust filter tube 8. Replacing the exhaust filter tube 8 before collecting the gas can effectively avoid the presence of residual exhaust gas components from the previous sampling when collecting and testing the exhaust gas, which will affect the subsequent test results.

[0023] The replacement device also includes a ring 14, a second connecting rod 15, an elastic telescopic rod 16, a card plate 17, a card plate 18, a fixed rod 19 and a circular plate 191. The ring 14 is slidably mounted on the bottom of the pressing plate 9, and the elastic telescopic rod 16 is fixedly mounted on the bottom of the rotating ring. One end of the No. 2 connecting rod 15 is rotatably mounted on the bottom of the ring 14, and the other end of the No. 2 connecting rod 15 is rotatably mounted on the top of the elastic telescopic rod 16. The card plate 17 is fixedly mounted on the side of the elastic telescopic rod 16 close to the rotating shaft 4, the card plate 18 is fixedly mounted on the circumferential surface of the rotating shaft 4, the fixed rod 19 is slidably mounted on the top of the storage tank 1, and the circular plate 191 is fixedly mounted on the inner wall of the storage tank 1. The retraction of the elastic telescopic rod 16 will pull the card plate 17 to move away from the rotating shaft 4, and the engagement of the card plate 17 and the card plate 18 will be released, so as to avoid affecting the replacement of the exhaust filter tube 8 by the rotation of the rotating ring caused by the rotation of the rotating shaft 4 when the exhaust filter tube 8 is replaced, so that the exhaust filter tube 8 cannot be assembled well, which increases the working time of the staff and reduces the work efficiency.

[0024] A filter screen is provided on the inner wall of the exhaust filter tube 8, and a slope is set on the side of the fixing rod 19 close to the pressing plate 9. The slope is provided to facilitate the pressing plate 9 to push the fixing rod 19 to move. A No. 1 spring is provided between the fixing rod 19 and the storage tank 1. The No. 1 spring is provided to drive the fixing rod 19 back to its original position. A No. 2 spring is provided between the push plate 11 and the storage tank 1. The No. 2 spring is provided to drive the push plate 11 back to its original position. A slope is set on the side of the push rod 12 close to the clamping plate 13. The slope is provided to facilitate the push rod 12 to push the clamping plate 13 to move. A No. 3 spring is provided between the clamping plate 13 and the storage tank 1. The No. 3 spring is provided to drive the clamping plate 13 back to its original position. The chuck 18 and the clamping plate 17 are interlocked.

[0025] When this embodiment is working: when it is necessary to extract and test the exhaust gas, the used exhaust filter tube 8 needs to be replaced with a new one. After the new exhaust filter tube 8 is replaced, the sampling device is placed in an environment full of exhaust gas. When the sampling device enters the exhaust gas environment, the exhaust valve 6 will extract the exhaust gas into the storage tank 1 and store it at the bottom of the circular plate 191 for collection and testing. Then the motor 2 is started. When the motor 2 is started, it will drive the exhaust filter tube 8 to rotate to extract and collect the exhaust gas around the storage tank 1. When replacing the exhaust filter tube 8, press the pressing plate 9 to slide downward. The downward sliding of the pressing plate 9 will push the No. 1 connecting rod 10 to move. The movement of the No. 1 connecting rod 10 will push the push plate 11 to slide. The sliding of the push plate 11 will push the push rod 12 to slide. The movement of the push rod 12 will push the clamping plate 13 to move to release the fixation of the exhaust filter tube 8, so that the exhaust filter tube 8 can be taken out. The downward sliding of the pressing plate 9 will engage with the fixing rod 1 9, the pressing plate 9 will push the fixing rod 19 to slide in the direction away from the motor 2. When the pressing plate 9 continues to slide downward, it will lose contact with the fixing rod 19, and the fixing rod 19 will be pulled back to its original position by the No. 1 spring, and the bottom of the fixing rod 19 will contact the top of the pressing plate 9, and the fixing rod 19 will be limited by the pressing plate 9 so that the pressing plate 9 will not return to its original position when the exhaust filter tube 8 is replaced. When the pressing plate 9 moves downward, it will push the ring 14 to slide downward, and the downward sliding of the ring 14 will push the No. 2 connecting rod 15 to move. The movement of the No. 2 connecting rod 15 will push the elastic telescopic rod 16 to retract. The retraction of the elastic telescopic rod 16 will pull the card plate 17 to move in the direction away from the rotating shaft 4, and the engagement of the card plate 17 and the chuck 18 will be released, avoiding the influence of the replacement of the exhaust filter tube 8 on the replacement of the exhaust filter tube 8 caused by the rotation of the rotating shaft 4.

[0026] See also Figures 1-9On the basis of the above embodiment, in another embodiment of the present invention, an intermittent device for controlling the entry of exhaust gas and a protective device for protecting the discharge of purified air are further provided inside the storage tank 1. The intermittent device includes a fixed column 21, an upper conical block 22, a lower conical block 23, a sliding rod 24, a first telescopic block 25, a purifier 26, a first pressure block 27, a second pressure block 28 and a blocking plate 29. A circular hole is opened at the bottom of the circular plate 191, and the purifier 26 is fixedly installed on the top of the circular plate 191. The fixed column 21 is fixedly installed on the top of the circular plate 191, the upper conical block 22 is fixedly installed on the top of the fixed column 21, the lower conical block 23 is slidably installed on the circumferential surface of the fixed column 21, and the sliding rod 24 slides The sliding rod 24 drives the No. 1 telescopic block 25 back to its original position and will not be blocked by the upper conical block 22. The sliding rod 24 will drive the blocking plate 29 to seal the circular hole, so that the exhaust gas is stored at the bottom of the circular plate 191, avoiding the exhaust gas from being discharged through the circular hole all the time, making the air pressure at the top of the circular plate 191 greater than the air pressure at the bottom of the circular plate 191, resulting in gas backflow or the exhaust gas cannot be discharged well, thereby reducing the exhaust gas purification efficiency.

[0027] The intermittent device also includes a pressure rod 291, a baffle 292, a pressure rod 293, a fixed block 294, a limit block 295 and a telescopic block 296. The baffle 292 is slidably mounted on the inner wall of the storage tank 1. The pressure rod 291 is fixedly mounted on the bottom of the baffle 292. The fixed block 294 is fixedly mounted on the inner wall of the storage tank 1. The pressure rod 293 slides through the bottom of the fixed block 294. The limit block 295 is slidably mounted on the top of the fixed block 294. The telescopic block 296 slides Installed on the side of the No. 1 baffle 292 close to the fixed block 294, the No. 1 baffle 292 will drive the No. 2 telescopic block 296 to return to its original position to block the exhaust hole 5, so that the purified gas continues to be collected inside the storage tank 1, so that the air pressure inside the storage tank 1 is greater than the external air pressure, to avoid the gas inside the storage tank 1 being discharged all the time. If the gas is discharged all the time, the air pressure inside and outside the storage tank 1 may be consistent, which may cause external exhaust gas to enter the storage tank 1 and may contaminate the purified gas.

[0028] The position of the No. 1 pressure block 27 is higher than the No. 2 pressure block 28. A No. 4 spring is provided between the sliding rod 24 and the circular plate 191. The No. 4 spring is provided to drive the sliding rod 24 back to its original position. A No. 5 spring is provided between the sliding rod 24 and the No. 1 telescopic block 25. The No. 5 spring is provided to drive the No. 1 telescopic block 25 back to its original position. The No. 1 telescopic block 25 is provided with an inclined surface on the side close to the fixed column 21. A No. 6 spring is provided between the No. 2 telescopic block 296 and the No. 1 baffle 292. The No. 6 spring is provided to drive the No. 2 telescopic block 296 back to its original position. The No. 2 telescopic block 296 is provided with an inclined surface on the side close to the fixed block 294. A No. 7 spring is provided between the limit block 295 and the fixed block 294. The No. 7 spring is provided to drive the limit block 295 back to its original position.

[0029] The protective device includes a fixing frame 30, a fan blade 31, a ratchet 32, a ratchet 33, a second baffle 34, a third baffle 35, a fixing frame 36, a push rod 37 and a fixing pin 38. The fixing frame 30 is fixedly mounted on the side of the fixing block 294 away from the exhaust hole 5, the fan blade 31 is rotatably mounted on the inner wall of the fixing frame 30, the ratchet 32 is fixedly mounted on the circumferential surface of the rotating shaft of the fan blade 31, the ratchet 33 is slidably mounted on the inner wall of the storage tank 1, the second baffle 34 is fixedly mounted on the side of the ratchet 33 close to the fan blade 31, one end of the push rod 37 is rotatably mounted on the side of the second telescopic block 296 close to the first baffle 292, and the other end of the push rod 37 is slidably mounted on the side of the first baffle 292 close to the second telescopic block 296 The fixed frame 36 is fixedly installed on the outer wall of the exhaust hole 5, the third baffle 35 is rotatably installed on the inner wall of the fixed frame 36, and the fixed pin 38 is rotatably installed on the side of the fixed frame 36 away from the storage tank 1. The fixed pin 38 is connected to the rotating shaft of the fan blade 31 by a wire rope. When the fan blade 31 stops rotating, the ratchet 32 will stop pushing the ratchet 33, and the ratchet 33 will slide downward due to its own gravity. The downward sliding of the ratchet 33 will drive the second baffle 34 to move downward to seal the exhaust hole 5. When the fan blade 31 stops rotating, it means that the air pressure inside and outside the storage tank 1 is about to be consistent. The consistent air pressure inside and outside the storage tank 1 may cause external exhaust gas to enter the interior of the storage tank 1, which may contaminate the purified gas.

[0030] A No. 1 torsion spring is provided between the No. 3 baffle 35 and the fixed frame 36. The No. 1 torsion spring is provided to drive the No. 3 baffle 35 to rotate and seal the exhaust hole 5. A No. 2 torsion spring is provided between the fixing pin 38 and the fixed frame 36. The No. 2 torsion spring is provided to drive the fixing pin 38 to return to its original position. A limiting groove is provided on the side of the No. 3 baffle 35 close to the fixing pin 38, and the fixing pin 38 is in contact with the inner wall of the limiting groove.

[0031] When this embodiment is working: after the replacement of the exhaust filter tube 8 is completed, the fixing rod 19 is pulled to release the fixing rod 19 from limiting the pressing plate 9, and the rotation of the rotating shaft 4 can drive the rotating ring to rotate, and the rotation of the rotating ring will drive the air intake pipe 7 to rotate, and the rotation of the air intake pipe 7 will drive the No. 1 pressure block 27 and the No. 2 pressure block 28 to move, and the No. 1 pressure block 27 will contact the sliding rod 24, and the No. 1 pressure block 27 will push the sliding rod 24 to slide downward, and the sliding rod 24 will push the blocking plate 29 to move, and the movement of the blocking plate 29 will release the limitation on the circular hole, and the limitation of the circular hole will be released, and the exhaust gas at the bottom of the circular plate 191 will enter the interior of the purifier 26, and the exhaust gas entering the interior of the purifier 26 will be purified into clean oxygen, and the sliding rod 24 will squeeze the No. 4 spring to store force when it moves downward, and the sliding The rod 24 slides downward, which drives the No. 1 telescopic block 25 to move. The No. 1 telescopic block 25 moves downward and contacts the bottom of the upper conical block 22. The upper conical block 22 limits the sliding rod 24, so that the sliding rod 24 cannot return to its original position to seal the circular hole. The exhaust gas will continue to enter the purifier 26 for purification, and the purified gas will be stored above the circular plate 191 inside the storage tank 1. When the rotating ring continues to rotate, the No. 2 pressure block 28 will contact the sliding rod 24. The No. 2 pressure block 28 will continue to press the sliding rod 24 to move downward. The downward pressure of the sliding rod 24 will drive the No. 1 telescopic block 25 to move downward. The inclined surface of the No. 1 telescopic block 25 will contact the lower conical block 23. The No. 1 telescopic block 25 will move toward the direction of the sliding rod 24 to compress the No. 5 spring. When the No. 2 pressure block 28 continues to move and disengages from the sliding rod 24, the sliding rod 24 will be pushed toward its original position by the No. 4 spring. When the sliding rod 24 moves toward its original position, the No. 1 telescopic block 25 will squeeze the lower conical block 23 due to the push of the No. 5 spring, so that when the No. 1 telescopic block 25 moves, it will drive the lower conical block 23 to move. When the lower conical block 23 contacts the upper conical block 22, it will prevent the lower conical block 23 from continuing to move. Then the No. 1 telescopic block 25 will slide on the conical surface of the lower conical block 23, and the No. 1 telescopic block 25 will slide toward the inside of the sliding rod 24. At this time, the sliding rod 24 drives the No. 1 telescopic block 25 back to its original position and will not be blocked by the upper conical block 22. Then the sliding rod 24 will drive the blocking plate 29 to seal the circular hole, so that the exhaust gas is stored at the bottom of the circular plate 191 , so that the air pressure at the bottom of the circular plate 191 is always greater than the air pressure at the top of the circular plate 191. The No. 1 pressure block 27 continues to move and contacts the No. 1 pressure rod 291, then the No. 1 pressure block 27 will push the No. 1 pressure rod 291 to move in the direction, and the No. 1 pressure rod 291 moves downward to pull the No. 1 baffle 292 to move. The movement of the No. 1 baffle 292 will release the seal of the exhaust hole 5, and the purified gas inside the storage tank 1 will be discharged to the outside through the exhaust hole 5. When the No. 1 baffle 292 moves downward, it will drive the No. 2 telescopic block 296 to move. The No. 2 telescopic block 296 moves downward and contacts the limit block 295. Then the No. 2 telescopic block 296 will be pushed by the limit block 295 to move in the direction of the No. 1 baffle 292. The movement of the No. 2 telescopic block 296 will squeeze the No. 6 spring to accumulate force.When the second telescopic block 296 continues to move, it will lose contact with the limit block 295, and the sixth spring will push the second telescopic block 296 back to its original position. When the second telescopic block 296 returns to its original position, the second telescopic block 296 will contact the bottom of the limit block 295, and the limit block 295 will limit the second telescopic block 296 so that the second telescopic block 296 cannot move upward, and the first baffle 292 is also limited. When the second pressure block 28 continues to move, it will contact the second pressure rod 293, and the second The pressure block 28 pushes the second pressure rod 293 downward, which releases the limit block 295. The limit block 295 is then pulled by the seventh spring to slide away from the second telescopic block 296. The limit block 296 is then released, and the first baffle 292 drives the second telescopic block 296 back to its original position to block the exhaust hole 5, allowing the purified gas to continue to collect inside the storage tank 1, making the air pressure inside the storage tank 1 greater than the air pressure outside.

[0032] When the No. 1 baffle 292 moves downward to release the obstruction of the exhaust hole 5, it will drive the fixing frame 30 to move downward, and the movement of the fixing frame 30 will drive the fan blade 31 to move. When the No. 1 baffle 292 moves downward, the ratchet 33 will also slide downward. When the No. 2 telescopic block 296 moves toward the direction of the No. 1 baffle 292, it will push the push rod 37 to move. The movement of the push rod 37 will push the ratchet 33 back to its original position. When the fan blade 31 moves downward, the fan blade 31 will contact the exhaust hole 5. When the gas inside the storage tank 1 is discharged, the fan blade 31 will be pushed to rotate. The rotation of the fan blade 31 will drive the ratchet 32 to rotate. The rotation of the ratchet 32 will push the ratchet 33 to remain in its original position. When the gas inside the storage tank 1 is exhausted, the fan blade 31 will stop. Stop rotation. When the fan blade 31 stops rotating, the ratchet 32 will stop pushing the ratchet 33, and the ratchet 33 will slide downward due to its own gravity. The downward sliding of the ratchet 33 will drive the second baffle 34 to move downward to seal the exhaust hole 5. When the ratchet 33 moves downward, it will push the fan blade 31 to rotate downward. The downward rotation of the fan blade 31 will pull the wire rope to reel in. The reeling of the wire rope will pull the fixing pin 38 to rotate in the direction away from the No. 3 baffle 35. The rotation of the fixing pin 38 in the direction away from the No. 3 baffle 35 will release the limit on the No. 3 baffle 35, and the No. 3 baffle 35 will be driven by the No. 1 torsion spring to rotate toward the exhaust hole 5 to strengthen the sealing of the exhaust hole 5, thereby preventing exhaust gas from backflowing into the storage tank 1.

[0033] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas sampling device for industrial waste gas detection, comprising a storage tank (1), characterized in that: A motor (2) is fixedly mounted on the top of the storage tank (1), a rotating shaft (4) is fixedly mounted on the output end of the motor (2), a detection device (3) is provided on the outer wall of the storage tank (1), an exhaust hole (5) is opened on the outer wall of the storage tank (1), a rotating ring is provided on the top of the storage tank (1), an exhaust valve (6) is fixedly mounted on the bottom of the rotating ring, an exhaust filter tube (8) is fixedly mounted on the air inlet of the exhaust valve (6), an air inlet pipe (7) is fixedly mounted on the air outlet of the exhaust valve (6), and a replacement device is also provided on the top of the storage tank (1); The replacement device includes a pressing plate (9), a No. 1 connecting rod (10), a push plate (11), a push rod (12) and a clamping plate (13), wherein the pressing plate (9) slides through the top of the storage tank (1), the push plate (11) is slidably mounted on the top of the storage tank (1), one end of the No. 1 connecting rod (10) is rotatably mounted on a side of the pressing plate (9) close to the push plate (11), the other end of the No. 1 connecting rod (10) is rotatably mounted on a side of the push plate (11) close to the pressing plate (9), the push rod (12) is slidably mounted on the top of the rotating ring, and the clamping plate (13) is slidably mounted on the top of the rotating ring; The storage tank (1) is further provided with an intermittent device for controlling the entry of exhaust gas and a protective device for protecting the discharge of purified air.

2. The waste gas sampling device for industrial waste gas detection according to claim 1, characterized in that: The replacement device also includes a circular ring (14), a second connecting rod (15), an elastic telescopic rod (16), a card plate (17), a chuck (18), a fixed rod (19) and a circular plate (191), wherein the circular ring (14) is slidably mounted on the bottom of the pressing plate (9), the elastic telescopic rod (16) is fixedly mounted on the bottom of the rotating ring, one end of the second connecting rod (15) is rotatably mounted on the bottom of the circular ring (14), and the other end of the second connecting rod (15) is rotatably mounted on the top of the elastic telescopic rod (16), the card plate (17) is fixedly mounted on a side of the elastic telescopic rod (16) close to the rotating shaft (4), the chuck (18) is fixedly mounted on the circumferential surface of the rotating shaft (4), the fixed rod (19) is slidably mounted on the top of the storage tank (1), and the circular plate (191) is fixedly mounted on the inner wall of the storage tank (1).

3. The waste gas sampling device for industrial waste gas detection according to claim 2, characterized in that: The inner wall of the suction filter tube (8) is provided with a filter screen, the side of the fixing rod (19) close to the pressing plate (9) is provided with an inclined surface, a No. 1 spring is provided between the fixing rod (19) and the storage tank (1), a No. 2 spring is provided between the push plate (11) and the storage tank (1), a side of the pushing rod (12) close to the clamping plate (13) is provided with an inclined surface, a No. 3 spring is provided between the clamping plate (13) and the storage tank (1), and the chuck (18) and the clamping plate (17) are interlocked.

4. The waste gas sampling device for industrial waste gas detection according to claim 3, characterized in that: The intermittent device comprises a fixed column (21), an upper conical block (22), a lower conical block (23), a sliding rod (24), a No. 1 telescopic block (25), a purifier (26), a No. 1 pressure block (27), a No. 2 pressure block (28) and a blocking plate (29). A circular hole is provided at the bottom of the circular plate (191). The purifier (26) is fixedly mounted on the top of the circular plate (191). The fixed column (21) is fixedly mounted on the top of the circular plate (191). The upper conical block (22) is fixedly mounted on the fixed column. (21), the lower conical block (23) is slidably mounted on the circumferential surface of the fixed column (21), the sliding rod (24) slides through the top of the circular plate (191), the No. 1 telescopic block (25) is slidably mounted on the side of the sliding rod (24) close to the fixed column (21), the No. 1 pressure block (27) is fixedly mounted on the circumferential surface of the intake pipe (7), the No. 2 pressure block (28) is fixedly mounted on the circumferential surface of the intake pipe (7), and the blocking plate (29) is fixedly mounted on the bottom of the sliding rod (24).

5. The waste gas sampling device for industrial waste gas detection according to claim 4, characterized in that: The intermittent device further comprises a No. 1 pressure rod (291), a No. 1 baffle (292), a No. 2 pressure rod (293), a fixed block (294), a limit block (295) and a No. 2 telescopic block (296), wherein the No. 1 baffle (292) is slidably mounted on the inner wall of the storage tank (1), the No. 1 pressure rod (291) is fixedly mounted on the bottom of the No. 1 baffle (292), the fixed block (294) is fixedly mounted on the inner wall of the storage tank (1), the No. 2 pressure rod (293) slides through the bottom of the fixed block (294), the limit block (295) is slidably mounted on the top of the fixed block (294), and the No. 2 telescopic block (296) is slidably mounted on a side of the No. 1 baffle (292) close to the fixed block (294).

6. The waste gas sampling device for industrial waste gas detection according to claim 5, characterized in that: The position of the No. 1 pressure block (27) is higher than the No. 2 pressure block (28), a No. 4 spring is provided between the sliding rod (24) and the circular plate (191), a No. 5 spring is provided between the sliding rod (24) and the No. 1 telescopic block (25), a slope is provided on the side of the No. 1 telescopic block (25) close to the fixed column (21), a No. 6 spring is provided between the No. 2 telescopic block (296) and the No. 1 baffle (292), a slope is provided on the side of the No. 2 telescopic block (296) close to the fixed block (294), and a No. 7 spring is provided between the limit block (295) and the fixed block (294).

7. The waste gas sampling device for industrial waste gas detection according to claim 6, characterized in that: The protective device comprises a fixing frame (30), a fan blade (31), a ratchet (32), a ratchet (33), a second baffle (34), a third baffle (35), a fixing frame (36), a push rod (37) and a fixing pin (38), wherein the fixing frame (30) is fixedly mounted on a side of the fixing block (294) away from the exhaust hole (5), the fan blade (31) is rotatably mounted on the inner wall of the fixing frame (30), the ratchet (32) is fixedly mounted on the circumferential surface of the rotating shaft of the fan blade (31), the ratchet (33) is slidably mounted on the inner wall of the storage tank (1), the second baffle (34) is fixedly mounted on the ratchet ( 33) is close to the side of the fan blade (31), one end of the push rod (37) is rotatably mounted on the side of the second telescopic block (296) close to the first baffle (292), and the other end of the push rod (37) is slidably mounted on the side of the first baffle (292) close to the second telescopic block (296), the fixed frame (36) is fixedly mounted on the outer wall of the exhaust hole (5), the third baffle (35) is rotatably mounted on the inner wall of the fixed frame (36), the fixed pin (38) is rotatably mounted on the side of the fixed frame (36) away from the storage tank (1), and the fixed pin (38) is connected to the rotating shaft of the fan blade (31) through a wire rope.

8. The waste gas sampling device for industrial waste gas detection according to claim 7, characterized in that: A first torsion spring is provided between the third baffle (35) and the fixed frame (36), a second torsion spring is provided between the fixed pin (38) and the fixed frame (36), a limiting groove is provided on a side of the third baffle (35) close to the fixed pin (38), and the fixed pin (38) contacts the inner wall of the limiting groove.

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