Active elimination system for harmful gas in workplace

Abstract

The invention relates to the technical field of harmful gas treatment, in particular to a system for actively eliminating harmful gas in a working place. Comprising a lower barrel, a reaction barrel is concentrically fixed to the upper end of the lower barrel, an upper barrel is concentrically fixed to the upper end of the reaction barrel, the diameter of the reaction barrel is larger than that of the upper barrel, and the upper end of the upper barrel is fixedly communicated with an air pump; the connecting rod is in sliding sealing connection with the upper end of the reaction cylinder, the lower end of the connecting rod is provided with a valve plate assembly, the valve plate assembly is in sliding sealing connection with the reaction cylinder, the valve plate assembly can be rotationally opened and is communicated with the reaction cylinder part above the valve plate assembly and the reaction cylinder part below the valve plate assembly, and the lower end of the upper cylinder is fixedly communicated with a liquid inlet pipe. According to the active harmful gas eliminating system, harmful gas in a working place can be treated for three times, and the harmful gas can be effectively eliminated.

Description

Technical Field

[0001] The invention relates to the technical field of harmful gas treatment, and in particular to a system for actively eliminating harmful gases in a workplace. Background Art

[0002] In the workshops of some enterprises, chemical, electrolytic and welding processes will produce a large amount of toxic and harmful gases. These toxic and harmful gases are diffused in the workshop, seriously affecting the health of the workers in the workshop and making them prone to occupational diseases. Moreover, directly discharging these toxic and harmful gases into the atmosphere will also cause environmental pollution. In order to maintain the safety of the ambient air, these toxic gases need to be harmlessly treated. Harmful gases in some production workshops will not be continuously generated, such as gas storage tanks with automatic drain valves. When the automatic drain valve discharges the liquid in the tank, some harmful gases will be discharged through the automatic drain valve. However, if a conventional harmful gas treatment device is installed in the workshop, the conventional harmful gas treatment device will work uninterruptedly for a long time, which will increase production costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an active harmful gas elimination system for workplaces with small harmful gas emissions and capable of intermittent startup to eliminate harmful gases. In order to achieve the above purpose, the technical solution provided by the present invention is:

[0004] A system for actively eliminating harmful gases in a workplace comprises a lower cylinder, a reaction cylinder is concentrically fixed to the upper end of the lower cylinder, an upper cylinder is concentrically fixed to the upper end of the reaction cylinder, the diameter of the reaction cylinder is larger than the diameter of the upper cylinder, an air pump is fixedly connected to the upper end of the upper cylinder, a piston is slidably and sealedly connected in the upper cylinder, a connecting rod is concentrically fixed to the lower end of the piston, the connecting rod passes through the upper end of the reaction cylinder, the connecting rod is slidably and sealedly connected to the upper end of the reaction cylinder, a valve plate assembly is installed at the lower end of the connecting rod, the valve plate assembly is slidably and sealedly connected to the reaction cylinder part above the valve plate assembly and the reaction cylinder part below the valve plate assembly, the lower end of the upper cylinder is fixedly connected to a liquid inlet pipe, a first one-way valve is installed in the liquid inlet pipe, a plurality of one-way nozzles are fixed to the upper end of the reaction cylinder, the one-way nozzles are connected to the lower end of the upper cylinder, and the upper and lower ends of the first connecting pipe are respectively The first connecting tube is fixedly connected with the upper and lower ends of the reaction tube, a third one-way valve is installed in the lower end of the first connecting tube, the upper end of the reaction tube is fixedly connected with an air inlet pipe, the air inlet pipe is installed with a second one-way valve, a retractable one-way driving component is installed at the lower end of the valve plate assembly, the one-way driving component runs through the upper end of the lower tube, the one-way driving component is rotatably and sealedly connected with the upper end of the lower tube, a plurality of collecting tubes are evenly distributed on the inner circumference of the lower tube, the one-way driving component can drive the collecting tube to rotate in the lower tube, the upper port of the collecting tube is in sealing contact with the top plate of the lower tube, the lower end of the reaction tube is connected with the side port of the tee, an electromagnetic valve is installed on the side port of the tee, the lower port of the tee is fixed on the top plate of the lower tube and is connected with an upper port of the collecting tube below it, the upper port of the tee is connected with the second connecting tube, a purification component is sleeved on the outer side of the upper tube, and the second connecting tube is connected with the purification component.

[0005] Specifically, the valve plate assembly includes a slide plate, which is slidingly and sealingly connected to the reaction cylinder. A circular cavity is opened in the slide plate, and a baffle is rotatably and sealingly connected in the circular cavity. A through hole corresponding to the baffle is opened on the slide plate, and the baffle blocks the through hole. A motor is concentrically fixed to the lower end of the connecting rod, and the output shaft of the motor is fixedly connected to the baffle.

[0006] Specifically, the one-way drive assembly includes a square rod, the upper end of the square rod is connected to the baffle through a one-way bearing, the square rod does not rotate when the baffle rotates forward to open the through hole, and the square rod rotates when the baffle rotates reversely, the upper end of the lower tube is concentrically rotating and sealingly connected with a square sleeve, the square rod is slidably inserted in the square sleeve, and a rotating plate is fixed to the lower end of the square sleeve in the lower tube, and a slot corresponding to the collecting tube is opened on the rotating plate, and the collecting tube is located in the slot.

[0007] Specifically, a limiting ring is concentrically fixed inside the lower end of the lower cylinder, and the outer edge of the limiting ring contacts the outer edge of the collecting cylinder.

[0008] Specifically, a scraper rod is fixed on the output shaft of the motor, and the scraper rod is in contact with the upper end of the slide plate.

[0009] Specifically, a window is provided on one side of the lower cylinder, a door panel is hinged in the window, and the collecting cylinder in the lower cylinder can be taken out by opening the door panel.

[0010] Specifically, the purification component includes a purification cylinder that is sleeved and fixed on the outside of the upper cylinder, an annular filter layer is fixed in the purification cylinder, a second connecting pipe is connected to the annular cavity between the filter layer and the upper cylinder, an exhaust pipe is fixed at the upper end of the purification cylinder, and the exhaust pipe is connected to the annular cavity between the filter layer and the side wall of the purification cylinder.

[0011] Specifically, a rotating ring is rotatably connected to the upper cylinder inside the filter layer, and a plurality of inclined guide plates are evenly distributed and fixed on the circumference of the outer side of the rotating plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This harmful gas active elimination system can treat harmful gases in the workplace three times and can effectively eliminate harmful gases.

[0014] 2. The treatment liquid used to treat harmful gases can be collected, which is convenient for subsequent centralized treatment of the treatment liquid.

[0015] 3. Each time a fixed amount of liquid is filled into the upper cylinder, the liquid is used in a fixed amount to prevent excessive consumption and reduce costs. During the secondary treatment, the gas can stir the treatment liquid so that the sediment in the treatment liquid no longer accumulates at the bottom of the reaction cylinder, making it easier to discharge the sediment in the treatment liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of this system.

[0017] Figure 2 This is the location diagram of the liquid inlet pipe in this system.

[0018] Figure 3 This is a cross-sectional view of the system.

[0019] Figure 4 for Figure 3 Magnified view of area A.

[0020] Figure 5 Schematic diagram of the second one-way valve in the intake pipe.

[0021] Figure 6 It is a cross-sectional view of the purification cartridge.

[0022] Figure 7 Schematic diagram of the valve plate assembly.

[0023] Figure 8 for Figure 7 Magnified view of area B.

[0024] Fig. 9 This is a schematic diagram of the cooperation between the square rod and the square sleeve.

[0025] Fig.10A schematic diagram of a scraper rod.

[0026] Fig.11 A cross-sectional view of the purification component.

[0027] Fig.12 Schematic diagram of the through holes on the skateboard.

[0028] The names of the parts in the attached drawings are: 1. lower cylinder; 2. door panel; 3. reaction cylinder; 4. upper cylinder; 5. purification cylinder; 6. air pump; 7. piston; 8. connecting rod; 9. liquid inlet pipe; 10. first one-way valve; 11. one-way nozzle; 12. motor; 13. scraper rod; 14. baffle; 15. slide plate; 16. through hole; 17. square rod; 18. square sleeve; 19. rotating plate; 20. air inlet pipe; 21. second one-way valve; 22. first connecting pipe; 23. third one-way valve; 24. three-way; 25. solenoid valve; 26. second connecting pipe; 27. filter layer; 28. swivel; 29. ​​guide plate; 30. exhaust pipe; 31. collecting cylinder; 32. limit ring. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1-Figure 12 As shown, a system for actively eliminating harmful gases in the workplace comprises a lower cylinder 1, a reaction cylinder 3 is coaxially fixed to the upper end of the lower cylinder 1, an upper cylinder 4 is coaxially fixed to the upper end of the reaction cylinder 3, and the diameter of the reaction cylinder 3 is larger than the diameter of the upper cylinder 4. An air pump 6 is fixedly connected to the upper end of the upper cylinder 4.

[0031] A piston 7 is slidably and sealably connected inside the upper cylinder 4, a connecting rod 8 is coaxially fixed to the lower end of the piston 7, the connecting rod 8 passes through the upper end of the reaction cylinder 3, the connecting rod 8 is slidably and sealably connected to the upper end of the reaction cylinder 3, and a valve plate assembly is installed at the lower end of the connecting rod 8.

[0032] The valve plate assembly is connected to the reaction tube 3 in a sliding and sealing manner. The valve plate assembly can be rotated to open and connect the reaction tube 3 part above the valve plate assembly and the reaction tube 3 part below the valve plate assembly.

[0033] The valve plate assembly includes a slide plate 15, which is slidably and sealedly connected to the reaction tube 3. A circular cavity is provided in the slide plate 15, and a baffle 14 is rotatably and sealedly connected in the circular cavity. A through hole 16 corresponding to the baffle 14 is provided on the slide plate 15, and the baffle 14 blocks the through hole 16. A motor 12 is concentrically fixed to the lower end of the connecting rod 8, and the output shaft of the motor 12 is fixedly connected to the baffle 14.

[0034] A scraper rod 13 is fixed on the output shaft of the motor 12 , and the scraper rod 13 contacts the upper end of the slide plate 15 .

[0035] The lower end of the upper cylinder 4 is fixedly connected with a liquid inlet pipe 9, and a first one-way valve 10 is installed in the liquid inlet pipe 9. A plurality of one-way nozzles 11 are fixedly provided at the upper end of the reaction cylinder 3, and the one-way nozzles 11 are connected with the lower end of the upper cylinder 4.

[0036] The upper and lower ends of the first connecting tube 22 are fixedly connected to the upper and lower ends of the reaction tube 3 respectively, and a third one-way valve 23 is installed in the lower end of the first connecting tube 22 .

[0037] The upper end of the reaction cylinder 3 is fixedly connected with an air inlet pipe 20 , and a second one-way valve 21 is installed in the air inlet pipe 20 .

[0038] A retractable one-way drive component is installed at the lower end of the valve plate assembly. The one-way drive component passes through the upper end of the lower cylinder 1. The one-way drive component is rotatably and sealedly connected to the upper end of the lower cylinder 1. A plurality of collecting cylinders 31 are evenly distributed on the inner circumference of the lower cylinder 1. The one-way drive component can drive the collecting cylinder 31 to rotate in the lower cylinder 1, and the upper port of the collecting cylinder 31 is in sealing contact with the top plate of the lower cylinder 1.

[0039] The one-way drive assembly includes a square rod 17, the upper end of which is connected to the baffle 14 through a one-way bearing. When the baffle 14 rotates forward to open the through hole 16, the square rod 17 does not rotate, and when the baffle 14 rotates reversely, the square rod 17 rotates. The upper end of the lower tube 1 is coaxially rotatably sealed with a square sleeve 18, and the square rod 17 is slidably inserted in the square sleeve 18. A rotating plate 19 is fixed to the lower end of the square sleeve 18 in the lower tube 1. A notch corresponding to the collecting tube 31 is opened on the rotating plate 19, and the collecting tube 31 is located in the notch.

[0040] A limiting ring 32 is coaxially fixed inside the lower end of the lower tube 1 , and the outer edge of the limiting ring 32 contacts the outer edge of the collecting tube 31 .

[0041] A window is provided on one side of the lower tube 1 , and a door panel 2 is hingedly connected in the window. The collecting tube 31 in the lower tube 1 can be taken out by opening the door panel 2 .

[0042] The lower end of the reaction cylinder 3 is connected to the side port of the tee 24, and a solenoid valve 25 is installed on the side port of the tee 24. The lower port of the tee 24 is fixed on the top plate of the lower cylinder 1 and is connected to the upper port of a collecting cylinder 31 below it. The upper port of the tee 24 is connected to the second connecting pipe 26. A purification component is sleeved on the outer side of the upper cylinder 4, and the second connecting pipe 26 is connected to the purification component.

[0043] The purification assembly includes a purification cylinder 5 sleeved and fixed on the outside of the upper cylinder 4, an annular filter layer 27 is fixed in the purification cylinder 5, a second connecting pipe 26 is connected to the annular cavity between the filter layer 27 and the upper cylinder 4, an exhaust pipe 30 is fixed to the upper end of the purification cylinder 5, and the exhaust pipe 30 is connected to the annular cavity between the filter layer 27 and the side wall of the purification cylinder 5. A rotating ring 28 is rotatably connected to the upper cylinder 4 inside the filter layer 27, and a plurality of inclined guide plates 29 are evenly distributed and fixed on the outer circumference of the rotating plate 19.

[0044] In the initial state, the piston 7 is in the upper end of the upper cylinder 4 , that is, the upper cylinder 4 below the piston 7 stores a treatment liquid for treating harmful gases.

[0045] When harmful gases need to be eliminated, the liquid inlet pipe 9 is connected to the treatment liquid storage tank. The air pump 6 is started, and the air pump 6 draws air into the upper cylinder 4 above the piston 7. After the air enters the upper cylinder 4 above the piston 7, it pushes the piston 7 to move downward. At this time, the first one-way valve 10 is closed, the one-way nozzle 11 is opened, and the treatment liquid in the upper cylinder 4 is pushed into the one-way nozzle 11 and then sprayed into the reaction cylinder 3 by the one-way nozzle 11.

[0046] When the piston 7 moves downward, it drives the connecting rod 8 to move downward, and the connecting rod 8 moves downward to drive the valve plate assembly to move downward. At this time, the through hole 16 is closed by the baffle 14, and the reaction tube 3 part above the slide plate 15 is not connected with the reaction tube 3 part below the slide plate 15.

[0047] Because the diameter of the reaction cylinder 3 is larger than the diameter of the upper cylinder 4, the volume of the upper cylinder 4 is smaller than the volume of the reaction cylinder 3. When the piston 7 and the valve plate assembly move downward by the same distance, the volume of the treatment liquid entering the reaction cylinder 3 through the one-way nozzle 11 is smaller than the increased volume of the reaction cylinder 3 above the valve plate assembly. Therefore, when the piston 7 and the valve plate assembly move downward synchronously, negative pressure will be generated in the reaction cylinder 3 above the valve plate assembly.

[0048] During the downward movement of the valve plate assembly in the reaction cylinder 3, the third one-way valve 23 is in a closed state, the first connecting pipe 22 is not conductive, the second one-way valve 21 and the solenoid valve 25 are both in an open state, and during the downward movement of the valve plate assembly in the reaction cylinder 3, harmful gases enter the reaction cylinder 3 through the air inlet pipe 20, and the air in the reaction cylinder 3 below the valve plate assembly is discharged through the three-way valve 24 and the second connecting pipe 26.

[0049] The harmful gas entering the reaction tube 3 is sprayed by the treatment liquid sprayed from the one-way nozzle 11. The treatment liquid will contact and react with the harmful gas during the falling process, thereby achieving the first treatment of the harmful gas. The liquid sprayed from the one-way nozzle 11 will gather on the slide plate 15, and the precipitate produced by the reaction of the harmful gas and the treatment liquid will fall on the slide plate 15.

[0050] After the piston 7 moves into the lower end of the upper cylinder 4, the valve plate assembly moves into the lower end of the reaction cylinder 3. Then the motor 12 is started to rotate the output shaft of the motor 12, which drives the scraper rod 13 and the baffle plate 14 to rotate in the forward direction. When the scraper rod 13 rotates, the sediment accumulated on the slide plate 15 is scraped into the through hole 16. After the baffle plate 14 rotates, the through hole 16 is opened.

[0051] Then close the solenoid valve 25 and start the air pump 6, the air pump 6 will extract the gas inside the upper tube 4, the piston 7 will move upward in the upper tube 4, when the piston 7 moves upward in the upper tube 4, negative pressure is generated in the part of the upper tube 4 below the piston 7, the first one-way valve 10 is turned on, the one-way nozzle 11 is closed, and the treatment liquid enters the lower part of the piston 7 in the upper tube 4 through the liquid inlet pipe 9.

[0052] When the piston 7 moves upward, it drives the valve plate assembly upward. Since the through hole 16 is in an open state, the liquid in the reaction cylinder 3 will also enter the part of the reaction cylinder 3 below the valve plate assembly through the through hole 16.

[0053] When the treatment liquid above the valve plate assembly has completely entered the reaction tube 3 below the valve plate assembly, the motor 12 is started to drive the scraper 13 and the baffle 14 to continue to rotate forward. When the baffle 14 recloses the through hole 16, the reaction tube 3 on both sides of the valve plate assembly is not connected. At this time, the treatment liquid in the reaction tube 3 is located below the valve plate assembly, and the harmful gas sprayed by the treatment liquid is located above the valve plate assembly.

[0054] Then the piston 7 continues to drive the valve plate assembly to move upward. At this time, the through hole 16 is blocked, and the one-way nozzle 11, the second one-way valve 21 and the solenoid valve 25 are closed. During the upward movement of the valve plate assembly, the harmful gas above it will enter the first connecting pipe 22 through the upper end of the first connecting pipe 22, and then enter the space below the valve plate assembly through the lower end of the first connecting pipe 22 and the third one-way valve 23.

[0055] When the harmful gas is discharged from the first connecting pipe 22, it contacts with the treatment liquid under the valve plate assembly. The harmful gas discharged from the lower end of the first connecting pipe 22 is washed by the treatment liquid under the valve plate assembly, thereby achieving a second treatment of the harmful gas.

[0056] When the harmful gas is discharged from the first connecting pipe 22 , it will stir the treatment liquid in the reaction tube 3 , causing the sediment in the treatment liquid to surge.

[0057] When the slide plate 15 moves to the upper end of the reaction tube 3, the second treatment of harmful gases is completed. At this time, the upper tube 4 below the piston 7 is filled with a quantitative treatment liquid. The quantitative use of the treatment liquid can prevent excessive consumption of the treatment liquid, thereby reducing costs.

[0058] At this time, the harmful gas in the reaction tube 3 is located above the treatment liquid in the reaction tube 3 .

[0059] Then the air pump 6 is started and the electromagnetic valve 25 is opened, and the air pump 6 draws air into the upper cylinder 4 above the piston 7, so that the piston 7 and the valve plate assembly move downward again. At this time, the harmful gas outside the reaction cylinder 3 continues to enter the reaction cylinder 3 through the air inlet pipe 20, and the treatment liquid in the upper cylinder 4 is sprayed out through the one-way nozzle 11 to spray the harmful gas entering the reaction cylinder 3.

[0060] During the downward movement of the piston 7 and the valve plate assembly, the third one-way valve 23 is in a closed state, and the through hole 16 is blocked by the baffle 14. At this time, the treatment liquid below the valve plate assembly will be pushed into the tee 24 first, and the treatment liquid entering the tee 24 will flow into the collection cylinder 31 connected to the lower end of the tee 24. When the treatment liquid in the reaction cylinder 3 below the valve plate assembly is completely entered into the collection cylinder 31, as the piston 7 and the valve plate assembly continue to move downward, the harmful gas in the reaction cylinder 3 below the valve plate assembly will pass through the tee 24 and the second connecting pipe 26 and enter the inner side of the filter layer 27, and the harmful gas discharged through the second connecting pipe 26 will be sprayed onto the guide plate 29, thereby generating a driving force, causing the multiple guide plates 29 and the rotating ring 28 to rotate, and the multiple guide plates 29 can disperse the harmful gas entering the inner side of the filter layer 27 when rotating. The filter layer 27 can filter harmful gases. The filter layer 27 is used to perform a third treatment on the harmful gases. The harmful gases are filtered by the filter layer 27 to form harmless gases, which are then discharged through the exhaust pipe 30 .

[0061] When the collecting cylinder 31 connected to the lower opening of the tee 24 is filled with the treatment liquid, after the valve plate assembly moves to the lower end of the reaction cylinder 3, the motor 12 drives the scraper rod 13 and the baffle 14 to rotate in the opposite direction. When the motor 12 drives the scraper rod 13 and the baffle 14 to rotate in the opposite direction, it can drive the square rod 17, the square sleeve 18 and the rotating plate 19 to rotate through the one-way bearing. When the rotating plate 19 rotates, it can drive the collecting cylinder 31 in the lower cylinder to rotate. After the motor 12 drives the scraper rod 13 and the baffle 14 to rotate in the opposite direction at a set angle, another collecting cylinder 31 is connected to the lower opening of the tee 24. Then the motor 12 drives the scraper rod 13 and the baffle 14 to rotate in the forward direction and restore the scraper rod 13 and the baffle 14. In this embodiment, there are four collecting tubes 31, that is, after the motor 12 drives the scraper rod 13 and the baffle plate 14 to rotate 90 degrees in the opposite direction, another collecting tube 31 will be connected to the lower opening of the tee 24, and then the motor 12 drives the scraper rod 13 and the baffle plate 14 to rotate 90 degrees in the forward direction and restore the scraper rod 13 and the baffle plate 14.

[0062] When the collecting tube 31 filled with the treatment liquid corresponds to the door panel 2 , the door panel 2 is opened to take out the collecting tube 31 and pour out the treatment liquid in the collecting tube 31 .

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for actively eliminating harmful gases in a workplace, comprising a lower cylinder (1), a reaction cylinder (3) being coaxially fixed to the upper end of the lower cylinder (1), and an upper cylinder (4) being coaxially fixed to the upper end of the reaction cylinder (3), characterized in that: The diameter of the reaction cylinder (3) is larger than the diameter of the upper cylinder (4); the upper end of the upper cylinder (4) is fixedly connected to an air pump (6); a piston (7) is slidably and sealably connected inside the upper cylinder (4); a connecting rod (8) is coaxially fixed to the lower end of the piston (7); the connecting rod (8) passes through the upper end of the reaction cylinder (3); the connecting rod (8) is slidably and sealably connected to the upper end of the reaction cylinder (3); a valve plate assembly is installed at the lower end of the connecting rod (8); the valve plate assembly is slidably and sealably connected to the reaction cylinder (3); the valve plate assembly can be rotated to open and connect The reaction cylinder (3) portion above the valve plate assembly and the reaction cylinder (3) portion below the valve plate assembly are connected, the lower end of the upper cylinder (4) is fixedly connected with a liquid inlet pipe (9), a first one-way valve (10) is installed in the liquid inlet pipe (9), a plurality of one-way nozzles (11) are fixedly connected to the upper end of the reaction cylinder (3), the one-way nozzles (11) are connected to the lower end of the upper cylinder (4), the upper and lower ends of the first connecting pipe (22) are respectively fixedly connected with the upper and lower ends of the reaction cylinder (3), and a first one-way valve (10) is installed in the lower end of the first connecting pipe (22). A third one-way valve (23) is provided. The upper end of the reaction cylinder (3) is fixedly connected to an air intake pipe (20). A second one-way valve (21) is installed in the air intake pipe (20). A retractable one-way drive component is installed at the lower end of the valve plate assembly. The one-way drive component passes through the upper end of the lower cylinder (1). The one-way drive component is rotatably sealed with the upper end of the lower cylinder (1). A plurality of collecting cylinders (31) are evenly distributed on the inner circumference of the lower cylinder (1). The one-way drive component can drive the collecting cylinders (31) to rotate in the lower cylinder (1). The upper end of the collecting cylinder (31) is in sealing contact with the top plate of the lower cylinder (1), the lower end of the reaction cylinder (3) is in communication with the side port of the tee (24), the side port of the tee (24) is provided with an electromagnetic valve (25), the lower end of the tee (24) is fixed on the top plate of the lower cylinder (1) and is in communication with the upper end of a collecting cylinder (31) below it, the upper end of the tee (24) is in communication with the second connecting pipe (26), the outer side of the upper cylinder (4) is provided with a purification component, and the second connecting pipe (26) is in communication with the purification component.

2. A system for actively eliminating harmful gases in the workplace according to claim 1, characterized in that: The valve plate assembly comprises a slide plate (15), the slide plate (15) is slidably sealedly connected to the reaction cylinder (3), a circular cavity is provided in the slide plate (15), a baffle plate (14) is rotatably sealedly connected in the circular cavity, a through hole (16) corresponding to the baffle plate (14) is provided on the slide plate (15), the baffle plate (14) blocks the through hole (16), a motor (12) is coaxially fixed to the lower end of the connecting rod (8), and an output shaft of the motor (12) is fixedly connected to the baffle plate (14).

3. A system for actively eliminating harmful gases in the workplace according to claim 2, characterized in that: The one-way drive assembly comprises a square rod (17), the upper end of the square rod (17) is connected to the baffle (14) via a one-way bearing, the square rod (17) does not rotate when the baffle (14) rotates forward to open the through hole (16), and the square rod (17) rotates when the baffle (14) rotates reversely, the upper end of the lower tube (1) is coaxially rotatably sealed with a square sleeve (18), the square rod (17) is slidably inserted in the square sleeve (18), and a rotating plate (19) is fixed to the lower end of the square sleeve (18) in the lower tube (1), and a notch corresponding to the collecting tube (31) is opened on the rotating plate (19), and the collecting tube (31) is located in the notch.

4. A system for actively eliminating harmful gases in the workplace according to claim 3, characterized in that: A limiting ring (32) is coaxially fixed inside the lower end of the lower cylinder (1), and the outer edge of the limiting ring (32) contacts the outer edge of the collecting cylinder (31).

5. A system for actively eliminating harmful gases in the workplace according to claim 2, characterized in that: A scraper rod (13) is fixed on the output shaft of the motor (12), and the scraper rod (13) is in contact with the upper end of the slide plate (15).

6. A system for actively eliminating harmful gases in the workplace according to claim 1, characterized in that: A window is provided on one side of the lower tube (1), and a door panel (2) is hingedly connected in the window. The collecting tube (31) in the lower tube (1) can be taken out by opening the door panel (2).

7. A system for actively eliminating harmful gases in the workplace according to claim 1, characterized in that: The purification assembly comprises a purification cylinder (5) sleeved and fixed on the outside of an upper cylinder (4); an annular filter layer (27) is fixed inside the purification cylinder (5); a second connecting pipe (26) is connected to an annular cavity between the filter layer (27) and the upper cylinder (4); an exhaust pipe (30) is fixed to the upper end of the purification cylinder (5); and the exhaust pipe (30) is connected to an annular cavity between the filter layer (27) and the side wall of the purification cylinder (5).

8. A system for actively eliminating harmful gases in the workplace according to claim 7, characterized in that: A rotating ring (28) is rotatably connected to the upper cylinder (4) inside the filtering layer (27), and a plurality of inclined guide plates (29) are evenly distributed and fixed on the circumference of the outer side of the rotating plate (19).

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