Collecting device for chemical plant waste gas detection

Abstract

The utility model provides a chemical plant waste gas detection collecting device which comprises a gas storage tank, a hand-held rod fixedly connected to the top of the gas storage tank, foot pads fixedly connected to four corners of the bottom of the gas storage tank, a gas outlet pipe fixedly connected to the left side of the gas storage tank, a first electric control valve fixedly sleeved on the outer side of the gas outlet pipe, and a pressure monitoring mechanism arranged on the right side of the gas storage tank. The right side of the pressure monitoring mechanism is provided with an exhaust pipe, the right end of the exhaust pipe is fixedly connected with a threaded connector, the right side of the exhaust pipe is fixedly connected with a sealing ring in a sleeving mode, the threaded connector is sleeved with an internal thread connecting sleeve, the right end of the internal thread connecting sleeve is fixedly connected with a connecting hose, and the right end of the connecting hose is provided with an exhaust filtering mechanism. The pressure monitoring mechanism is arranged, so that the use requirements under different conditions can be met, the practicability is high, meanwhile, the sealing condition can be detected, a user can know the leakage at the first time when the leakage occurs, and the safety is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of waste gas detection, in particular to a collection device for waste gas detection in a chemical plant. Background Art

[0002] Chemical waste gas refers to toxic and harmful gases discharged by chemical plants during chemical production. Chemical waste gas often contains many types of pollutants, with complex physical and chemical properties and different toxicities, which seriously pollute the environment and affect human health. The composition of chemical waste gas generated by different chemical production industries varies greatly. For example, the waste gas generated by the chlor-alkali industry mainly contains chlorine, hydrogen chloride, vinyl chloride, mercury, acetylene, etc., and the waste gas generated by the nitrogen fertilizer industry mainly contains nitrogen oxides, urea dust, carbon monoxide, ammonia, sulfur dioxide, methane, etc.; industrial waste gas purification treatment is roughly divided into three important links, and its steps are from waste gas collection, to waste gas treatment equipment and process purification, and then to the end gas detection and then discharge into the atmosphere by chimney. When testing chemical waste gas, it is necessary to use the collection device of chemical plant waste gas detection to collect the waste gas so that it can be taken to the laboratory for testing.

[0003] After searching, the utility model patent with the announcement number CN216746994U discloses a collection device for detecting waste gas in a chemical plant, including a treatment box, a first connecting pipe is fixedly connected to the front end of the treatment box, a collecting box is fixedly connected to the front side of the collecting box, a second connecting pipe is fixedly connected to the front end of the second connecting pipe, a collecting port is fixedly connected to the inside of the treatment box, a moving device is arranged on the inner wall of the front side of the treatment box, a groove is arranged on the inner wall of the front side of the treatment box, a waste gas blocking device is arranged in the groove, and a third connecting pipe is fixedly connected to the rear end of the treatment box; through the design of long plates, push blocks and circular baffles, the waste gas can automatically block the waste gas filling the inside of the treatment box without using a motor, which not only saves energy but also ensures a certain volume of the waste gas to be detected in the collecting box, and at the same time ensures that the detection amount is consistent each time, thereby ensuring the accuracy of waste gas collection detection and reducing errors.

[0004] In the above patented technical solution, the long plate squeezes the push block to drive the screw rod to rotate, and the rotation of the screw rod finally drives the circular baffle to block the exhaust gas from the first connecting pipe entering the collection box, so that the exhaust gas automatically blocks the exhaust gas filling the collection box without using a motor, ensuring that the detection amount is consistent each time, thereby ensuring the accuracy of exhaust gas collection detection, reducing errors, and effectively filtering the particles carried in the incoming exhaust gas through the filter net to prevent impurities from being mixed in the exhaust gas collection and affecting the subsequent device operation. However, the above patented technical solution still has the following shortcomings when used:

[0005] 1. When the above patented technical solution is used, although it can ensure that the detection amount is consistent each time, the capacity of the collection box in the above patented technical solution is limited. When it is necessary to collect exhaust gas samples under a specified air pressure, the above patented technical solution cannot meet the use requirements under different circumstances, and the practicality is low. At the same time, the above patented technical solution cannot detect the sealing condition of the collection box. When a leak occurs, the user cannot know it in the first time, and the safety hazard is high;

[0006] 2. When the above patented technical solution is used, although the set filter can effectively filter the particles carried in the incoming exhaust gas, the above patented technical solution cannot clean the dust adsorbed on the filter, resulting in the filter holes on the filter being clogged by dust after the filter has been used for a period of time, causing the device to be unable to be used normally, causing inconvenience to the user;

[0007] Therefore, we provide a collection device for waste gas detection in a chemical plant to solve the defects existing in the above-mentioned patent technical solution. Utility Model Content

[0008] The utility model mainly provides a collection device for detecting waste gas in a chemical plant, which is used to solve the technical problems raised in the above-mentioned background technology.

[0009] The technical solution adopted by the utility model to solve the above technical problems is:

[0010] A collection device for detecting waste gas in a chemical plant comprises an air storage box, a carrying rod is fixedly connected to the top of the air storage box, foot pads are fixedly connected to the four corners of the bottom of the air storage box, an air outlet pipe is fixedly connected to the left side of the air storage box, an electric control valve 1 is fixedly provided on the outer side of the air outlet pipe, a pressure monitoring mechanism is provided on the right side of the air storage box, an exhaust pipe is provided on the right side of the pressure monitoring mechanism, an electric control valve 2 is fixedly provided on the outer side of the exhaust pipe, a threaded joint is fixedly connected to the right end of the exhaust pipe, a sealing ring is fixedly connected to the right side of the exhaust pipe and sleeved on the outer side of the threaded joint, an internal threaded connecting sleeve is sleeved on the outer side of the threaded joint, a connecting hose is fixedly connected to the right end of the internal threaded connecting sleeve, and an exhaust filtering mechanism is provided on the right end of the connecting hose.

[0011] Furthermore, the pressure monitoring mechanism includes an air pipe fixedly connected to the right side of the air storage tank, the right end of the air pipe is fixedly connected to a monitoring box, an online pressure gauge is fixedly connected to the center of the top of the monitoring box, an alarm is fixedly connected to the right corner of the top front end of the monitoring box, an air pump is fixedly connected to the right side of the monitoring box, a control box is fixedly connected to the front end of the monitoring box, a display is fixedly connected to the top of the front end of the control box, a number of evenly distributed buttons are fixedly connected to the front end of the control box and below the display, a battery is fixedly connected to the bottom end of the control box, a partition is fixedly connected to the top of the battery, and a PLC controller is fixedly connected to the top of the partition.

[0012] Furthermore, the output end of the gas pipe is connected to the interior of the gas storage box, the input end of the gas pipe is connected to the interior of the monitoring box, the output end of the air pump is connected to the interior of the monitoring box, the input end of the air pump is fixedly connected to the output end of the air pump, and the internal threaded connecting sleeve is threadedly connected to the threaded joint.

[0013] Furthermore, the input end of the online pressure gauge is connected to the inside of the air storage box, and the online pressure gauge, alarm, vacuum pump, display and button are all electrically connected to the PLC controller, and the PLC controller is electrically connected to the battery.

[0014] Furthermore, the air extraction and filtering mechanism includes a filter box fixedly connected to the right end of the connecting hose, a protective cover fixedly connected to the left side of the top of the filter box, a micro motor fixedly connected inside the protective cover, a driving wheel fixedly sleeved on the outer side of the output end of the micro motor, a hand grip rod fixedly connected to the right side of the top of the filter box, an air extraction cover fixedly connected to the right side of the filter box, a collecting box fixedly connected to the bottom of the filter box, a slot is provided at the front end of the collecting box, a fixed block is fixedly connected to the front end of the collecting box and located above the slot, a latch is slidably inserted into the top of the fixed block, and sliding grooves are provided on the inner walls on both sides of the slot. A collecting drawer is provided inside the slot, and sliding rods are fixedly connected to the left and right sides of the collecting drawer, a baffle is fixedly connected to the front end of the collecting drawer, a plug hole is provided on the top of the baffle, a drop opening is provided on the right side of the bottom end of the filter box, a filter screen is fixedly connected to the left side of the top of the drop opening inside the filter box, a rotating rod is provided at the center of the right side of the filter screen, a mounting ring is fixedly provided on the left side fixed sleeve outside the rotating rod, fixing plates are fixedly connected on the upper and lower sides of the mounting ring, a cleaning brush is fixedly connected to the side of the fixing plate close to the filter screen, a driven wheel is provided on the right side fixed sleeve outside the rotating rod, and a transmission belt is provided on the outer side of the driven wheel.

[0015] Furthermore, the input end of the connecting hose is connected to the interior of the filter box, the slot is connected to the interior of the filter box through a drop port opened on the right side of the bottom end of the filter box, the collecting drawer is slidably connected to the sliding grooves opened on the left and right inner walls of the slot through sliding rods arranged on the left and right sides, a sealing gasket is provided at the joint between the rear end of the baffle and the front end of the collecting box, and the pin is slidably plugged into the socket.

[0016] Furthermore, the output end of the exhaust hood is connected to the inside of the filter box, the left end of the rotating rod is rotatably connected to the right side of the filter screen through a bearing, the cleaning bristles are in contact with the right side of the filter screen, the driven wheel is connected to the driving wheel through a transmission belt that passes through the filter box and the protective cover, and the transmission belt is slidably connected to the filter box and the protective cover.

[0017] Furthermore, the micro motor, the second electric control valve and the first electric control valve are all electrically connected to the PLC controller.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model sets a pressure monitoring mechanism. When the user uses the device to collect waste gas from a chemical plant, he inputs the waste gas pressure value to be extracted through the button and then starts the device. After the device is started, the PLC controller first opens the electric control valve 2, and then the PLC controller controls the vacuum pump to start extracting chemical waste gas. After the chemical waste gas is drawn into the gas storage box, the online pressure gauge detects the air pressure inside the gas storage box. When the air pressure value inside the gas storage box reaches the set air pressure value, the PLC controller receives the signal and closes the vacuum pump and the electric control valve 2, thereby realizing quantitative waste gas extraction. At the same time, by setting The online pressure gauge can monitor the air pressure inside the gas tank when the user is transporting the gas tank. When the air pressure drops, the air pressure change of the online pressure gauge will be monitored by the PLC controller, and then the PLC controller will immediately activate the alarm to remind the user, so that the user can know the leakage at the first time and deal with it in time. When the collection device for waste gas detection in the chemical plant is used, it can meet the use needs in different situations and has high practicality. At the same time, it can also detect the sealing condition. When a leak occurs, the user can know it at the first time, thereby improving safety.

[0020] The dust collecting box is then cleaned by the user by the filter element when the filter element is used. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the pressure monitoring mechanism of the utility model;

[0023] Figure 3 This is an axonometric diagram of the air extraction and filtering mechanism of the utility model;

[0024] Figure 4 This is a schematic diagram of the internal structure of the air extraction and filtering mechanism of the utility model;

[0025] Figure 5 for Figure 4 Magnified view of area A in .

[0026] In the figure: 1. gas storage box; 101. hand lever; 102. air outlet pipe; 103. electric control valve 1; 104. foot pad; 2. pressure monitoring mechanism; 201. monitoring box; 202. online pressure gauge; 203. alarm; 204. air pump; 205. air pipe; 206. control box; 207. partition; 208. PLC controller; 209. battery; 210. display; 211. button; 3. air pump; 301. electric control valve 2; 302. threaded joint; 303. sealing ring; 304. connecting hose; 305. internal thread connection 4, exhaust filter mechanism; 401, filter box; 402, protective cover; 403, hand grip; 404, exhaust hood; 405, collection box; 406, slot; 407, slide; 408, fixing block; 409, latch; 410, collection drawer; 411, slide bar; 412, baffle; 413, jack; 414, drop port; 415, micro motor; 416, driving wheel; 417, filter screen; 418, rotating rod; 419, driven wheel; 420, mounting ring; 421, fixing plate; 422, cleaning brush; 423, transmission belt. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0028] For examples, please refer to the attached Figure 1-5 As shown, a collection device for detecting waste gas in a chemical plant comprises an air storage box 1, a carrying rod 101 is fixedly connected to the top of the air storage box 1, foot pads 104 are fixedly connected to the four corners of the bottom of the air storage box 1, an air outlet pipe 102 is fixedly connected to the left side of the air storage box 1, an electric control valve 1 103 is fixedly sleeved on the outer side of the air outlet pipe 102, a pressure monitoring mechanism 2 is provided on the right side of the air storage box 1, an air extraction pipe 3 is provided on the right side of the pressure monitoring mechanism 2, an electric control valve 2 301 is fixedly sleeved on the outer side of the air extraction pipe 3, a threaded joint 302 is fixedly connected to the right end of the air extraction pipe 3, a sealing ring 303 is fixedly connected to the right side of the air extraction pipe 3 and sleeved on the outer side of the threaded joint 302, an internal threaded connecting sleeve 305 is sleeved on the outer side of the threaded joint 302, a connecting hose 304 is fixedly connected to the right end of the internal threaded connecting sleeve 305, and an air extraction filtering mechanism 4 is provided on the right end of the connecting hose 304.

[0029] The pressure monitoring mechanism 2 includes an air pipe 205 fixedly connected to the right side of the air storage box 1, a monitoring box 201 is fixedly connected to the right end of the air pipe 205, an online pressure gauge 202 is fixedly connected to the center of the top of the monitoring box 201, an alarm 203 is fixedly connected to the right corner of the top front end of the monitoring box 201, an air pump 204 is fixedly connected to the right side of the monitoring box 201, a control box 206 is fixedly connected to the front end of the monitoring box 201, a display 210 is fixedly connected to the top of the front end of the control box 206, a plurality of evenly distributed buttons 211 are fixedly connected to the front end of the control box 206 and below the display 210, and the control box 20 6 The bottom end of the interior is fixedly connected to a battery 209, the top of the battery 209 is fixedly connected to a partition 207, the top of the partition 207 is fixedly connected to a PLC controller 208, the output end of the gas pipe 205 is connected to the inside of the gas storage box 1, the input end of the gas pipe 205 is connected to the inside of the monitoring box 201, the output end of the air pump 204 is connected to the inside of the monitoring box 201, the input end of the air pump 204 is fixedly connected to the output end of the air pump 3, and the internal threaded connection sleeve 305 is threadedly connected to the threaded joint 302, the input end of the online pressure gauge 202 is connected to the inside of the gas storage box 1, the online pressure gauge 202, the alarm 203, and the air pump 204 are connected to the inside of the gas storage box 1. , the display 210 and the button 211 are all electrically connected to the PLC controller 208, and the PLC controller 208 is electrically connected to the battery 209. Before the exhaust gas is extracted, the internal threaded connection sleeve 305 is connected to the threaded joint 302 to complete the assembly of the device, and then the exhaust gas pressure number to be extracted is input through the button 211, and then the device is started. After the device is started, the PLC controller 208 first opens the electric control valve 2 301, and then the PLC controller 208 controls the vacuum pump 204 to start extracting the chemical waste gas. After the chemical waste gas is sucked into the gas storage box 1, the online pressure gauge 202 detects the gas pressure inside the gas storage box 1. When the air pressure value inside the air storage box 1 reaches the set air pressure value, the PLC controller 208 receives the signal and closes the air pump 204 and the electric control valve 2 301, thereby realizing quantitative exhaust gas extraction. At the same time, the online pressure gauge 202 can be set to monitor the air pressure inside the air storage box 1 during the user's transportation of the air storage box 1. When the air pressure drops, the air pressure change of the online pressure gauge 202 will be monitored by the PLC controller 208, and then the PLC controller 208 immediately starts the alarm 203 to alert the user, so that the user can be aware of the air leakage at the first time and deal with it in time.

[0030] The air extraction and filtering mechanism 4 includes a filter box 401 fixedly connected to the right end of the connecting hose 304, a protective cover 402 is fixedly connected to the left side of the top of the filter box 401, a micro motor 415 is fixedly connected inside the protective cover 402, a driving wheel 416 is fixedly sleeved on the outer side of the output end of the micro motor 415, a hand grip 403 is fixedly connected to the right side of the top of the filter box 401, an air extraction cover 404 is fixedly connected to the right side of the filter box 401, a collecting box 405 is fixedly connected to the bottom of the filter box 401, a slot 406 is opened at the front end of the collecting box 405, and a fixing block 408 is fixedly connected to the front end of the collecting box 405 and located above the slot 406 A latch 409 is slidably inserted into the top of the fixed block 408, and a slide groove 407 is provided on the inner walls on both sides of the slot 406. A collecting drawer 410 is provided inside the slot 406, and sliding rods 411 are fixedly connected to the left and right sides of the collecting drawer 410. A baffle 412 is fixedly connected to the front end of the collecting drawer 410, and a plug hole 413 is provided on the top of the baffle 412. A drop-out port 414 is provided on the right side of the bottom end of the filter box 401, and a filter screen 417 is fixedly connected to the left side of the top of the drop-out port 414 inside the filter box 401. A rotating rod 418 is provided at the center of the right side of the filter screen 417, and a mounting ring 420 is provided on the fixed sleeve on the left side of the rotating rod 418. The upper and lower sides of the mounting ring 420 are fixedly connected with fixing plates 421, and one side of the fixing plate 421 close to the filter screen 417 is fixedly connected with a cleaning brush 422. A driven wheel 419 is fixedly sleeved on the right side of the outer side of the rotating rod 418, and a transmission belt 423 is sleeved on the outer side of the driven wheel 419. The input end of the connecting hose 304 is connected with the interior of the filter box 401, and the slot 406 is connected with the interior of the filter box 401 through the drop opening 414 opened on the right side of the bottom end of the filter box 401. The collecting drawer 410 is slidably connected with the slide grooves 407 opened on the inner walls of the left and right sides of the slot 406 through the slide bars 411 set on the left and right sides. A sealing gasket is provided at the fitting part of the front end of the collecting box 405, and the latch 409 is slidably plugged into the socket 413. In the process of extracting the exhaust gas, the exhaust gas enters the filter box 401 through the exhaust hood 404, and then the exhaust gas is filtered by the filter screen 417 and discharged through the connecting hose 304. A part of the particles filtered by the filter screen 417 will directly fall into the collecting drawer 410 through the drop port 414 for collection. When the device is not in use, the user can remove the latch 409 to pull the collecting drawer 410 out of the slot 406 and clean the dust particles inside the collecting drawer 410 to ensure the normal use of the device.

[0031] The output end of the exhaust hood 404 is connected to the inside of the filter box 401, the left end of the rotating rod 418 is rotatably connected to the right side of the filter screen 417 through a bearing, the cleaning bristles 422 are in contact with the right side of the filter screen 417, the driven wheel 419 is connected to the driving wheel 416 through the transmission belt 423 that is set to penetrate the filter box 401 and the protective cover 402, and the transmission belt 423 is slidably connected to the penetration point of the filter box 401 and the protective cover 402, and the micro motor 415, the electric control valve 2301 and the electric control valve 110 are connected to ... 3 are electrically connected to the PLC controller 208. The particles adhering to the filter screen 417 are driven by the micro motor 415 to rotate the driving wheel 416. The driving wheel 416 rotates and the driven wheel 419 is driven to rotate through the transmission belt 423. The driven wheel 419 drives the rotating rod 418 to rotate, so that the installation ring 210 drives the cleaning brush 422 to rotate, and the filter screen 417 is cleaned, and the particles adhering to the filter screen 417 are cleaned off, thereby ensuring the filtering effect of the filter screen 417.

[0032] The specific operation mode of the utility model is as follows:

[0033] First, the user carries the device by means of the carrying rod 101. Before extracting the waste gas, the user connects the internal threaded connection sleeve 305 with the threaded joint 302 to complete the assembly of the device. Then, the waste gas pressure to be extracted is input through the button 211, and then the device is started. After the device is started, the PLC controller 208 first opens the electric control valve 2 301, and then the PLC controller 208 controls the vacuum pump 204 to start extracting the chemical waste gas. After the chemical waste gas is drawn into the gas storage box 1, the online pressure gauge 202 detects the gas pressure inside the gas storage box 1. When the air pressure value inside the air storage box 1 reaches the set air pressure value, the PLC controller 208 receives the signal and closes the air pump 204 and the electric control valve 201, thereby realizing quantitative exhaust gas extraction. At the same time, the set online pressure gauge 202 can monitor the air pressure inside the air storage box 1 during the user's transportation of the air storage box 1. When the air pressure drops, the air pressure change of the online pressure gauge 202 will be detected by the PLC controller 208, and then the PLC controller 208 immediately activates the alarm 203 to alarm, The user is alerted so that the user can be informed of the air leakage at the first time and deal with it in time. In the process of extracting the exhaust gas, the exhaust gas enters the filter box 401 through the exhaust hood 404, and then the exhaust gas is filtered by the filter screen 417 and discharged through the connecting hose 304. A part of the particles filtered by the filter screen 417 will directly fall into the collection bin 410 through the drop port 414 for collection, while the particles adhered to the filter screen 417 will be driven by the micro motor 415 to drive the driving wheel 416 to rotate, and the driving wheel 416 rotates At the same time, the transmission belt 423 drives the driven wheel 419 to rotate, so that the driven wheel 419 drives the rotating rod 418 to rotate, so that the mounting ring 210 drives the cleaning brush 422 to rotate, and cleans the filter 417, and cleans the particles adhering to the filter 417 to ensure the filtering effect of the filter 417. At the same time, when the device is not in use, the user can remove the pin 409 to pull out the collecting drawer 410 from the inside of the slot 406, and clean the dust particles inside the collecting drawer 410 to ensure the normal use of the device.

[0034] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A collection device for detecting waste gas in a chemical plant, comprising a gas storage box (1), characterized in that: The top of the gas storage box (1) is fixedly connected to a carrying handle (101), the four corners of the bottom of the gas storage box (1) are fixedly connected to foot pads (104), the left side of the gas storage box (1) is fixedly connected to an air outlet pipe (102), the outer side of the air outlet pipe (102) is fixedly sleeved with an electric control valve (103), the right side of the gas storage box (1) is provided with a pressure monitoring mechanism (2), the right side of the pressure monitoring mechanism (2) is provided with an air extraction pipe (3), the outer side of the air extraction pipe (3) is fixedly sleeved with an electric control valve (103), An electric control valve 2 (301) is sleeved thereon, a threaded joint (302) is fixedly connected to the right end of the air extraction pipe (3), a sealing ring (303) is fixedly connected to the right side of the air extraction pipe (3) and sleeved on the outside of the threaded joint (302), an internal threaded connection sleeve (305) is sleeved on the outside of the threaded joint (302), a connecting hose (304) is fixedly connected to the right end of the internal threaded connection sleeve (305), and an air extraction filter mechanism (4) is provided at the right end of the connecting hose (304).

2. A collection device for detecting waste gas in a chemical plant according to claim 1, characterized in that: The pressure monitoring mechanism (2) comprises an air delivery pipe (205) fixedly connected to the right side of the air storage box (1); the right end of the air delivery pipe (205) is fixedly connected to a monitoring box (201); the center of the top of the monitoring box (201) is fixedly connected to an online pressure gauge (202); the top front end of the monitoring box (201) is fixedly connected to a right corner of an alarm (203); the right side of the monitoring box (201) is fixedly connected to an air pump (204); the front end of the monitoring box (201) is fixedly connected to a pressure relief valve (206); A control box (206) is fixedly connected, a display (210) is fixedly connected to the top of the front end of the control box (206), a plurality of evenly distributed buttons (211) are fixedly connected to the front end of the control box (206) and below the display (210), a battery (209) is fixedly connected to the bottom end of the control box (206), a partition (207) is fixedly connected to the top of the battery (209), and a PLC controller (208) is fixedly connected to the top of the partition (207).

3. A collection device for detecting waste gas in a chemical plant according to claim 2, characterized in that: The output end of the gas delivery pipe (205) is connected to the interior of the gas storage box (1), the input end of the gas delivery pipe (205) is connected to the interior of the monitoring box (201), the output end of the air extraction pump (204) is connected to the interior of the monitoring box (201), the input end of the air extraction pump (204) is fixedly connected to the output end of the air extraction pipe (3), and the internal threaded connection sleeve (305) is threadedly connected to the threaded joint (302).

4. A collection device for detecting waste gas in a chemical plant according to claim 2, characterized in that: The input end of the online pressure gauge (202) is connected to the interior of the air storage box (1); the online pressure gauge (202), the alarm (203), the air pump (204), the display (210) and the button (211) are all electrically connected to the PLC controller (208), and the PLC controller (208) is electrically connected to the battery (209).

5. A collection device for detecting waste gas in a chemical plant according to claim 2, characterized in that: The air extraction and filtering mechanism (4) comprises a filter box (401) fixedly connected to the right end of the connecting hose (304); a protective cover (402) is fixedly connected to the left side of the top of the filter box (401); a micro motor (415) is fixedly connected inside the protective cover (402); a driving wheel (416) is fixedly sleeved on the outside of the output end of the micro motor (415); a hand grip (403) is fixedly connected to the right side of the top of the filter box (401); The filter box (401) is fixedly connected to a suction hood (404) on the side, the bottom of the filter box (401) is fixedly connected to a collection box (405), a slot (406) is provided at the front end of the collection box (405), a fixed block (408) is fixedly connected to the front end of the collection box (405) and located above the slot (406), a latch (409) is slidably inserted through the top of the fixed block (408), and sliding grooves (407) are provided on the inner walls on both sides of the slot (406), and the inner wall of the slot (406) is provided with a plurality of grooves (407). A collecting drawer (410) is provided at the bottom, and sliding rods (411) are fixedly connected to the left and right sides of the collecting drawer (410). A baffle (412) is fixedly connected to the front end of the collecting drawer (410), and a plug hole (413) is provided on the top of the baffle (412). A drop-out opening (414) is provided on the right side of the bottom end of the filter box (401). A filter screen (417) is fixedly connected to the left side of the top of the drop-out opening (414) inside the filter box (401). The filter screen (417) 17) A rotating rod (418) is provided at the center of the right side, a mounting ring (420) is provided on the left fixed sleeve outside the rotating rod (418), a fixing plate (421) is fixedly connected to the upper and lower sides of the mounting ring (420), a cleaning brush (422) is fixedly connected to the side of the fixing plate (421) close to the filter screen (417), a driven wheel (419) is provided on the right fixed sleeve outside the rotating rod (418), and a transmission belt (423) is provided on the outer side of the driven wheel (419).

6. A collection device for detecting waste gas in a chemical plant according to claim 5, characterized in that: The input end of the connecting hose (304) is connected to the interior of the filter box (401), and the slot (406) is connected to the interior of the filter box (401) through a drop opening (414) opened on the right side of the bottom end of the filter box (401). The collecting drawer (410) is slidably connected to the slide grooves (407) opened on the left and right inner walls of the slot (406) through slide rods (411) arranged on the left and right sides. A sealing gasket is provided at the joint between the rear end of the baffle (412) and the front end of the collecting box (405), and the latch (409) is slidably plugged into the socket (413).

7. A collection device for detecting waste gas in a chemical plant according to claim 5, characterized in that: The output end of the exhaust hood (404) is connected to the inside of the filter box (401), the left end of the rotating rod (418) is rotatably connected to the right side of the filter screen (417) through a bearing, the cleaning bristles (422) are in contact with the right side of the filter screen (417), the driven wheel (419) is connected to the driving wheel (416) through a transmission belt (423) that passes through the filter box (401) and the protective cover (402), and the transmission belt (423) is slidably connected to the filter box (401) and the protective cover (402) at the penetration point.

8. The collection device for detecting waste gas in a chemical plant according to claim 5, characterized in that: The micro motor (415), the second electric control valve (301) and the first electric control valve (103) are all electrically connected to the PLC controller (208).

Images