Ventilation cabinet with waste gas treatment mechanism

Abstract

The invention discloses a fume hood with a waste gas treatment mechanism, and relates to the technical field of manufacturing of equipment special for atmospheric pollution and environmental protection, the fume hood comprises a fume hood body, an air outlet is formed in the top of the fume hood body, and the waste gas treatment mechanism is arranged in the air outlet. The multi-layer purification effect on the air is completed, and each layer of connecting pipe is provided with different liquids, so that when the waste gas passes through the different liquids, various different hydrophilic and oleophylic impurities in the waste gas can be naturally adsorbed by the different liquids, and the automatic separation effect on harmful substances in the waste gas is completed; meanwhile, the waste gas is discharged into the liquid more uniformly, the situation that the filtering and separating efficiency of impurities in the waste gas is unstable after the waste gas enters due to different saturations of all positions of the liquid in the connecting pipe is avoided, and all positions of the liquid are effectively utilized as much as possible to achieve the stable and efficient impurity separating effect.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing special equipment for air pollution environment protection, in particular to a fume hood with an exhaust gas treatment mechanism. Background Art

[0002] Gas separation is the process of separating the components in a mixed gas by cryogenics, adsorption, membrane, etc. An exhaust gas treatment device for a laboratory fume hood described in a patent application with a publication number of CN220834649U relates to the technical field of manufacturing special equipment for air pollution environmental protection, and comprises a purification barrel, a barrel cover is arranged at the top position of the purification barrel, a second servo motor is fixedly connected to the middle position of the top of the barrel cover, a rotating rod is passed through and fixedly connected to the output end of the second servo motor, a first air inlet pipe is passed through and fixedly connected to the left position of the top of the barrel cover, and a second connecting pipe is threadedly connected to the top position of the outer wall of the first air inlet pipe; At present, when fume hoods are used to treat exhaust gas, it is necessary to separate various types of contaminated particles diffused in the exhaust gas. However, when filtering it through liquid, it is easy to cause different saturation levels inside the liquid, which makes it impossible for the liquid to separate the particles in the exhaust gas with maximum efficiency, resulting in a decrease in the separation efficiency of the contaminated particles in the exhaust gas. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a fume hood with an exhaust gas treatment mechanism, which achieves the purpose of solving the above-mentioned problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A fume hood with an exhaust gas treatment mechanism, comprising a fume hood, an air outlet is provided on the top of the fume hood, and an exhaust gas treatment mechanism is provided inside the air outlet; The exhaust gas treatment mechanism comprises: A connecting rod, wherein the connecting rod is a round rod-shaped structure, one end of the connecting rod is fixedly connected to the inner wall of the air outlet, the other end of the connecting rod is fixedly connected to a protective cover, a motor is arranged inside the protective cover, and a long rod is fixedly connected to the output end of the motor, and the long rod is used to be driven to rotate by the motor; A circular plate, a one-way valve is fixedly connected to the inner wall of the circular plate, the inner wall of the one-way valve is fixedly connected to the outer wall of the long rod, the outer wall of the long rod is fixedly connected to a filter plate, the inner wall of the filter plate is provided with filter holes, a hollow column is arranged between the filter plate and the circular plate, a toggle plate is fixedly connected to the outer wall of the hollow column, a circular plate and an annular refiner are arranged on the outer wall of the toggle plate, and the circular plate is used to hold various types of liquids.

[0005] Preferably, the top of the hollow column is fixedly connected to the bottom of the filter plate, the bottom of the hollow column is fixedly connected to the top of the circular plate, a connecting pipe is fixedly connected to one side of the toggle plate, an annular refiner is fixedly connected to the inner wall of the connecting pipe, and the annular refiner is used to refine the exhaust gas into bubbles.

[0006] Preferably, the inner wall of the connecting pipe is connected to the interior of the annular refiner, the interior of the hollow column is connected to the interior of the one-way valve, the interior of the hollow column is connected to the interior of the toggle plate, and the interior of the toggle plate is connected to the interior of the connecting pipe.

[0007] Preferably, a rotating mechanism is provided inside the connecting tube, and the rotating mechanism comprises a blade, one side of the blade is fixedly connected to the inner wall of the connecting tube, and the other side of the blade is fixedly connected to a rotating shaft, and the blade is used to be rotated by air.

[0008] Preferably, a telescopic rod is fixedly connected to one side of the connecting tube, a built-in spring is arranged inside the telescopic rod, and the telescopic rod can be telescoped.

[0009] Preferably, a toggle mechanism is provided on one side of the telescopic rod, and the toggle mechanism includes a fixed plate, a slider is fixedly connected to one side of the fixed plate, the outer wall of the slider is slidably connected to the inner wall of the connecting tube, an elastic rope is fixedly connected to one side of the slider, one end of the elastic rope is fixedly connected to the annular refiner, a pull rope is fixedly connected to the outer wall of the fixed plate, one end of the pull rope is fixedly connected to a long plate, one side of the long plate is fixedly connected to a sub-plate, one side of the long plate is fixedly connected to a rotating rod, the outer wall of the rotating rod is rotatably connected to a baffle, and the inner wall of the baffle is fixedly connected to the outer wall of the connecting tube.

[0010] Preferably, a fixing sleeve is slidably connected to both ends of the rotating rod, the outer wall of the fixing sleeve is fixedly connected to the outer wall of the baffle, the inner wall of the fixing sleeve is provided with a built-in torsion spring, and both ends of the built-in torsion spring are fixedly connected to one end of the rotating rod and the inner wall of the fixing sleeve.

[0011] Preferably, a groove is provided on the inner wall of the sub-plate, and the groove is used to disperse the bubbles.

[0012] The present invention provides a fume hood with an exhaust gas treatment mechanism, which has the following beneficial effects: 1. The present invention completes the multi-layer purification of air by setting up an exhaust gas treatment mechanism in a multi-layer manner, and each layer of connecting pipes is provided with different liquids, so that when the exhaust gas passes through different liquids, various hydrophilic, lipophilic and other impurities in the exhaust gas can be naturally adsorbed by different liquids, thereby completing the automatic separation of harmful substances in the exhaust gas.

[0013] 2. The present invention sets up a waste gas treatment mechanism. When the waste gas enters the liquid in the connecting pipe, it is discharged through the annular refiners on the outer walls of each connecting pipe of several toggle plates, so that the waste gas is discharged into the liquid more evenly, avoiding the situation where the saturation of different places in the liquid in the connecting pipe is different, resulting in unstable filtering and separation efficiency of impurities in the waste gas after the waste gas enters, and effectively utilizes each position of the liquid as much as possible to achieve stable and efficient impurity separation.

[0014] 3. The present invention sets up a waste gas treatment mechanism, and through the rotation of the toggle plate, the liquid is toggled, so that the upper layer and the lower layer, the inner layer and the outer layer are fully integrated, thereby ensuring the stability of the saturation of each position of the liquid. At the same time, when the annular refiner outside the toggle plate discharges waste gas bubbles, it will also be discharged in a mobile manner as the toggle plate rotates, and the bubbles are fully sprinkled to various positions in the liquid. The rotational sprinkling makes the waste gas more evenly filled in the liquid, thereby ensuring the separation and purification efficiency of the liquid for the waste gas.

[0015] 4. The present invention provides an exhaust gas treatment mechanism. When the bubbles rise to the bottom of the filter plate, the rotation of the filter plate will move some bubbles that are accumulated at the bottom of the filter plate and cannot enter the filter holes, so that all the bubbles can enter the filter holes, thus completing the stable rising of the bubbles.

[0016] 5. The present invention provides a rotating mechanism so that the bubbles are discharged in a rotating manner when discharged from the annular refiner, thereby maintaining the uniformity of the bubbles discharged through the annular refiner and avoiding the blockage of various positions of the annular refiner during long-term operation, which may result in the inability to perform uniform annular spraying.

[0017] 6. The present invention provides a toggle mechanism to allow the bubbles to fully diffuse outward. Since the long plate is fixed on the rotating rod at an angle, the inclined long plate and the auxiliary plate will throw the bubbles together with the liquid in the center outward, and discharge them through the gaps between each long plate and auxiliary plate, thereby fully dispersing the exhaust gas bubbles, accelerating the efficiency of the bubbles dissolving in the liquid, and ensuring the uniformity of the bubbles dissolving in the liquid.

[0018] 7. The present invention sets a toggle mechanism to ensure that the water and waste gas at the bubble discharge position of the annular refiner are thrown outward by the long plate and the sub-plate through the inclined surfaces. At the same time, a negative pressure is formed between each long plate. At this time, the water flow in front will be replenished in the position between each long plate, so that the liquid forms a stable flow effect, and avoids the problem that the water flow becomes stationary under long-term toggle, resulting in the liquid being unable to be toggled and collided by the toggle plate. Further, the liquid can bring the waste gas bubbles to every corner of the liquid through the flow, thereby completing the adsorption and purification of impurities in the waste gas.

[0019] 8. The present invention sets a toggle mechanism, so that the blades are pulled to open and close to different degrees according to the amount of air pumped. Under high flow and high power, the long plate is opened as much as possible to increase the rising speed of bubbles and provide sufficient space for bubbles to go out, so as to avoid the problem of low bubble purification efficiency and increased internal pressure. Under low flow, the blades are closed as much as possible to reduce the gap between the blades, so that the bubbles can be fully broken up by the blades, thereby improving the dispersion effect of the bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 It is a structural schematic diagram of the exhaust gas treatment mechanism of the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the exhaust gas treatment mechanism of the present invention; Figure 5 It is a structural schematic diagram of the connecting pipe of the present invention; Figure 6 The structure diagram of the rotating mechanism of the present invention is shown in FIG. Figure 1 ; Figure 7 The structure diagram of the rotating mechanism of the present invention is shown in FIG. Figure 2 ; Figure 8 The structure diagram of the rotating mechanism of the present invention is shown in FIG. Figure 3 ; Fig. 9 It is a schematic diagram of the disassembled structure of the rotating mechanism of the present invention; Fig.10 The motion state diagram of the rotating mechanism of the present invention is shown in FIG. Figure 1 ; Fig.11 The motion state diagram of the rotating mechanism of the present invention is shown in FIG. Figure 2 ; Fig.12 The motion state of the toggle mechanism of the present invention is shown in FIG. Figure 1 ; Fig.13 It is a structural schematic diagram of the toggle mechanism of the present invention; Fig.14 For the present invention Figure 5 A magnified image of point A; Fig.15 The motion state of the toggle mechanism of the present invention is shown in FIG. Figure 2 ; Fig.16 The motion state of the toggle mechanism of the present invention is shown in FIG. Figure 3 ; Fig.17 The motion state of the toggle mechanism of the present invention is shown in FIG. Figure 4 .

[0021] In the figure: 1 air outlet, 2 exhaust gas treatment mechanism, 201 connecting rod, 203 long rod, 204 filter plate, 205 protective cover, 206 filter hole, 207 toggle plate, 208 connecting pipe, 209 annular refiner, 210 hollow column, 211 one-way valve, 212 round plate, 3 rotating mechanism, 301 blade, 302 rotating shaft, 303 telescopic rod, 4 toggle mechanism, 401 slider, 402 fixed plate, 403 pull rope, 404 rotating rod, 405 long plate, 406 fixed sleeve, 407 sub-plate, 408 groove, 409 baffle, 410 elastic rope, 5 fume hood. DETAILED DESCRIPTION

[0022] Example 1: Please refer to Figure 1-4 , the present invention provides a technical solution: a fume hood with an exhaust gas treatment mechanism, comprising a fume hood 5, an air outlet 1 is arranged on the top of the fume hood 5, and an exhaust gas treatment mechanism 2 is arranged inside the air outlet 1; The exhaust gas treatment mechanism 2 comprises: The connecting rod 201 is a circular rod-shaped structure. One end of the connecting rod 201 is fixedly connected to the inner wall of the air outlet 1. The other end of the connecting rod 201 is fixedly connected to a protective cover 205. A motor is arranged inside the protective cover 205. The output end of the motor is fixedly connected to a long rod 203. The long rod 203 is used to be driven to rotate by the motor. A circular plate 212, the inner wall of which is fixedly connected with a one-way valve 211, the inner wall of which is fixedly connected with the outer wall of the long rod 203, the outer wall of which is fixedly connected with a filter plate 204, the inner wall of which is provided with a filter hole 206, a hollow column 210 is provided between the filter plate 204 and the circular plate 212, the outer wall of which is fixedly connected with a toggle plate 207, the outer wall of which is provided with a circular plate 212 and an annular refiner 209, the circular plate 212 is used to contain various liquids.

[0023] The top of the hollow column 210 is fixedly connected to the bottom of the filter plate 204, and the bottom of the hollow column 210 is fixedly connected to the top of the circular plate 212. A connecting pipe 208 is fixedly connected to one side of the toggle plate 207, and an annular refiner 209 is fixedly connected to the inner wall of the connecting pipe 208. The annular refiner 209 is used to refine the exhaust gas into bubbles.

[0024] The inner wall of the connecting pipe 208 is connected to the inside of the annular refiner 209, the inside of the hollow column 210 is connected to the inside of the one-way valve 211, the inside of the hollow column 210 is connected to the inside of the toggle plate 207, and the inside of the toggle plate 207 is connected to the inside of the connecting pipe 208; When the fume hood 5 is in use, the fan inside the fume hood 5 is started to draw the exhaust gas in the window of the fume hood 5 into the air outlet 1, and then transport and discharge it outward through the air outlet 1, thereby completing the automatic discharge of the exhaust gas generated in the use of the fume hood 5; When the exhaust gas enters the air outlet 1, it will pass through the annular refiners 209 in the several circular plates 212 in the air outlet 1, and enter the hollow column 210 through the one-way valve 211, and then enter the toggle plate 207 through the connection between the inside of the hollow column 210 and the inside of the toggle plate 207, and enter the connecting pipe 208 from the toggle plate 207, and be discharged outward through the annular refiner 209 embedded in the middle position of the connecting pipe 208, thereby completing the natural discharge of the exhaust gas to between the circular plate 212 and the filter plate 204, and through the liquid contained between the circular plate 212 and the filter plate 204, the air passes through the liquid and the filter plate 204. The air comes into contact with the liquid to complete the purification, and the air naturally rises in the liquid to the filter hole 206 in the filter plate 204, and continues to rise from the filter hole 206 to the annular refiner 209 in the middle of the next circular plate 212, and enters again from the one-way valve 211 between the circular plate 212 and the filter plate 204 of the previous layer, and completes the multi-layer purification of the air through a multi-layer method, and each layer of the circular plate 212 is provided with different liquids, so that when the exhaust gas passes through different liquids, various hydrophilic, lipophilic and other different impurities in the exhaust gas can be naturally adsorbed by different liquids, thereby completing the automatic separation of harmful substances in the exhaust gas; The motor inside the protective cover 205 drives the long rod 203 to rotate to the toggle plate 207 in a counterclockwise direction when viewed from a top view; When the waste gas enters the liquid in the circular plate 212, it is discharged through the annular refiners 209 on each connecting pipe 208 on the outer wall of the plurality of shifting plates 207, thereby completing the uniform discharge of the waste gas into the liquid, and the gas is refined and discharged through the annular refiners 209, so that the waste gas is discharged into the liquid more uniformly, avoiding the situation that the filtration and separation efficiency of impurities in the waste gas is unstable after the waste gas enters due to different saturations in different parts of the liquid in the circular plate 212, and effectively utilizing each position of the liquid as much as possible to achieve stable and efficient impurity separation; Example 2: Please refer to Figure 1-11 On the basis of the first embodiment, the present invention provides a technical solution: a rotating mechanism 3 is arranged inside the connecting tube 208, and the rotating mechanism 3 includes a blade 301, one side of the blade 301 is fixedly connected to the inner wall of the connecting tube 208, and the other side of the blade 301 is fixedly connected to a rotating shaft 302, and the blade 301 is used to be rotated by the air.

[0025] A telescopic rod 303 is fixedly connected to one side of the connecting tube 208. A built-in spring is arranged inside the telescopic rod 303, so that the telescopic rod 303 can be extended and retracted. At the same time, the motor inside the protective cover 205 is started to control the long rod 203 to rotate, and the long rod 203 drives each filter plate 204 to rotate together with the circular plate 212, so that the hollow column 210 connected to the circular plate 212 and the filter plate 204 also rotates, and the rotation of the hollow column 210 drives the toggle plate 207 on the outer wall to rotate synchronously. Through the rotation of the toggle plate 207, the liquid on the circular plate 212 can be toggled, and the liquid is toggled so that the upper layer and the lower layer, the inner layer and the outer layer are fully integrated to ensure the stability of the saturation of each position of the liquid. At the same time, when the annular refiner 209 outside the toggle plate 207 discharges exhaust gas bubbles, it will also be discharged in a mobile manner with the rotation of the toggle plate 207, and the bubbles will be fully sprinkled to various positions in the liquid. The rotating sprinkle makes the exhaust gas more evenly filled in the liquid, ensuring the separation and purification efficiency of the liquid to the exhaust gas; The motor inside the protective cover 205 drives the long rod 203 to rotate to the toggle plate 207 in a counterclockwise direction when viewed from a top view; When the bubbles rise to the bottom of the filter plate 204, the rotation of the filter plate 204 moves some of the bubbles that are accumulated at the bottom of the filter plate 204 and cannot enter the filter holes 206, so that all the bubbles enter the filter holes 206, completing the stable rising of the bubbles. Example 3: Please refer to Figure 1-17 On the basis of the first and second embodiments, the present invention provides a technical solution: a toggle mechanism 4 is provided on one side of the telescopic rod 303, and the toggle mechanism 4 includes a fixed plate 402, a slider 401 is fixedly connected to one side of the fixed plate 402, the outer wall of the slider 401 is slidably connected to the inner wall of the connecting tube 208, an elastic rope 410 is fixedly connected to one side of the slider 401, one end of the elastic rope 410 is fixedly connected to the annular refiner 209, a pull rope 403 is fixedly connected to the outer wall of the fixed plate 402, one end of the pull rope 403 is fixedly connected to a long plate 405, one side of the long plate 405 is fixedly connected to a sub-plate 407, one side of the long plate 405 is fixedly connected to a rotating rod 404, the outer wall of the rotating rod 404 is rotatably connected to a baffle 409, and the inner wall of the baffle 409 is fixedly connected to the outer wall of the connecting tube 208.

[0026] A fixed sleeve 406 is slidably connected at both ends of the rotating rod 404. The outer wall of the fixed sleeve 406 is fixedly connected to the outer wall of the baffle 409. The inner wall of the fixed sleeve 406 is provided with a built-in torsion spring. The two ends of the built-in torsion spring are respectively fixedly connected to one end of the rotating rod 404 and the inner wall of the fixed sleeve 406.

[0027] A groove 408 is formed on the inner wall of the sub-plate 407, and the groove 408 is used to disperse the bubbles; When the exhaust gas is pressurized and discharged outward by the fume hood 5, and is discharged from the annular refiner 209 through the connecting pipe 208, the flow of air will drive the blade 301 to rotate. The blade 301 is set as an inclined surface, so when the air passes through, the blade 301 will be driven to rotate synchronously with the rotating shaft 302 and the connecting pipe 208. The connecting pipe 208 is rotatably connected to the outer wall of the toggle plate 207 through the bearing ring, so that the air can be discharged through the annular refiner 209 in the connecting pipe 208, and the connecting pipe 208 and the annular refiner 209 will also rotate in a circle; When the connecting pipe 208 rotates as a whole, the baffle plate 409 on the outer wall of the connecting pipe 208 is driven to rotate. When the baffle plate 409 rotates, the rotating rod 404 and the fixing sleeve 406 hinged on the baffle plate 409 are driven to rotate. The rotating rod 404 drives the long plate 405 and the auxiliary plate 407 to rotate in a circle, so that the exhaust gas discharged through the annular refiner 209 is centrifugally moved by the rotation of the long plate 405 and the auxiliary plate 407, so that the bubbles are fully diffused outward. Since the long plate 405 is fixed on the rotating rod 404 at an angle, the inclined long plate 405 and the auxiliary plate 407 will throw the bubbles together with the liquid in the center outward, and discharge them through the gaps between each long plate 405 and the auxiliary plate 407, thereby fully dispersing the exhaust gas bubbles, accelerating the efficiency of the bubbles dissolving in the liquid, and ensuring the uniformity of the bubbles dissolving in the liquid; When the exhaust gas is absorbed for a long time, the toggle plate 207 will perform a long circular rotation stirring. In this state, the liquid and the toggle plate 207 will gradually rotate at the same speed. At this time, the liquid and the toggle plate 207 are in a relatively static state of synchronous rotation. At this time, with the rotation of the long plate 405 and the auxiliary plate 407, the inclined surfaces of the long plate 405 and the auxiliary plate 407 will be used to ensure that the water and exhaust gas at the bubble position discharged by the annular refiner 209 are thrown outward by the long plate 405 and the auxiliary plate 407. At the same time, a negative pressure is formed between each long plate 405. At this time, the water flow in front will be replenished to the position between each long plate 405, so that the liquid forms a stable flow effect, and it also avoids the problem that the water flow becomes static under the long-term toggle, which causes the liquid to be unable to be toggled and collided by the toggle plate 207. Further, the liquid can bring the exhaust gas bubbles to every corner of the liquid through the flow, and complete the adsorption and purification of impurities in the exhaust gas. When high-power exhaust gas adsorption is required, the air extraction volume and air extraction speed increase, and the opening of the annular refiner 209 is limited, so the pressure in the connecting pipe 208 increases. The larger air pressure pushes the slider 401 outward and overcomes the elastic force of the elastic rope 410 fixed between the slider 401 and the annular refiner 209, so that the slider 401 and the fixed plate 402 are pushed outward. At this time, when the fixed plate 402 is pushed outward, the pull rope 403 is pulled synchronously, so that the pull rope 403 is pulled around the rotating rod 404 to pull the long plate 405. When the long plate 405 is pulled, the rotating rod 404 will be driven to rotate on the outer wall of the baffle 409, and overcome the elastic force of the built-in torsion spring between the fixed sleeve 406, so that the long plate 405 and the auxiliary plate 407 are closed, so that when the fixed plate 402 is pushed out, each long plate 405 and the auxiliary plate 407 are pulled closed, so that the blades will be pulled to open and close to different degrees according to the amount of air pumped, and the long plate 405 will be opened as much as possible under high flow and high power to increase the speed of bubble rise and provide enough space for bubbles to go out, so as to avoid the problem of low bubble purification efficiency and increased internal pressure. Under low flow, the blades are closed as much as possible to reduce the gap between the blades, so that the bubbles are fully dispersed by the blades, and the dispersion effect of the bubbles is improved. The built-in spring inside the telescopic rod 303 is used to reset the fixed plate 402.

[0028] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fume hood with an exhaust gas treatment mechanism, comprising a fume hood (5), wherein an air outlet (1) is arranged at the top of the fume hood (5), characterized in that: An exhaust gas treatment mechanism (2) is disposed inside the air outlet (1); The exhaust gas treatment mechanism (2) comprises: A connecting rod (201), the connecting rod (201) being a circular rod-shaped structure, one end of the connecting rod (201) being fixedly connected to the inner wall of the air outlet (1), the other end of the connecting rod (201) being fixedly connected to a protective cover (205), a motor being arranged inside the protective cover (205), a long rod (203) being fixedly connected to the output end of the motor, the long rod (203) being used to be driven to rotate by the motor; A circular plate (212), the inner wall of which is fixedly connected to a one-way valve (211), the inner wall of which is fixedly connected to the outer wall of a long rod (203), the outer wall of which is fixedly connected to a filter plate (204), the inner wall of which is provided with a filter hole (206), a hollow column (210) being arranged between the filter plate (204) and the circular plate (212), the outer wall of which is fixedly connected to a toggle plate (207), the outer wall of which is provided with a circular plate (212) and an annular refiner (209), the circular plate (212) being used to contain various types of liquids.

2. A fume hood with an exhaust gas treatment mechanism according to claim 1, characterized in that: The top of the hollow column (210) is fixedly connected to the bottom of the filter plate (204), the bottom of the hollow column (210) is fixedly connected to the top of the circular plate (212), one side of the shifting plate (207) is fixedly connected to a connecting pipe (208), the inner wall of the connecting pipe (208) is fixedly connected to an annular refiner (209), and the annular refiner (209) is used to refine the exhaust gas into bubbles.

3. A fume hood with an exhaust gas treatment mechanism according to claim 2, characterized in that: The inner wall of the connecting pipe (208) is connected to the interior of the annular refiner (209), the interior of the hollow column (210) is connected to the interior of the one-way valve (211), the interior of the hollow column (210) is connected to the interior of the toggle plate (207), and the interior of the toggle plate (207) is connected to the interior of the connecting pipe (208).

4. A fume hood with an exhaust gas treatment mechanism according to claim 3, characterized in that: A rotating mechanism (3) is provided inside the connecting tube (208), the rotating mechanism (3) comprising a blade (301), one side of the blade (301) being fixedly connected to the inner wall of the connecting tube (208), and the other side of the blade (301) being fixedly connected to a rotating shaft (302), the blade (301) being used to be rotated by air.

5. A fume hood with an exhaust gas treatment mechanism according to claim 4, characterized in that: A telescopic rod (303) is fixedly connected to one side of the connecting tube (208), a built-in spring is arranged inside the telescopic rod (303), and the telescopic rod (303) is capable of telescoping.

6. A fume hood with an exhaust gas treatment mechanism according to claim 5, characterized in that: A toggle mechanism (4) is provided on one side of the telescopic rod (303). The toggle mechanism (4) comprises a fixed plate (402). A slider (401) is fixedly connected to one side of the fixed plate (402). The outer wall of the slider (401) is slidably connected to the inner wall of the connecting tube (208). An elastic rope (410) is fixedly connected to one side of the slider (401). One end of the elastic rope (410) is fixedly connected to the annular thinner (209). A pull rope (403) is fixedly connected to the outer wall of the fixed plate (402). One end of the pull rope (403) is fixedly connected to a long plate (405). One side of the long plate (405) is fixedly connected to a sub-plate (407). One side of the long plate (405) is fixedly connected to a rotating rod (404). The outer wall of the rotating rod (404) is rotatably connected to a baffle (409). The inner wall of the baffle (409) is fixedly connected to the outer wall of the connecting tube (208).

7. A fume hood with an exhaust gas treatment mechanism according to claim 6, characterized in that: The two ends of the rotating rod (404) are slidably connected to a fixing sleeve (406), the outer wall of the fixing sleeve (406) is fixedly connected to the outer wall of the baffle (409), the inner wall of the fixing sleeve (406) is provided with a built-in torsion spring, and the two ends of the built-in torsion spring are fixedly connected to one end of the rotating rod (404) and the inner wall of the fixing sleeve (406).

8. A fume hood with an exhaust gas treatment mechanism according to claim 7, characterized in that: The inner wall of the auxiliary plate (407) is provided with a groove (408), and the groove (408) is used to disperse bubbles.

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