CN219951223U

CN219951223U - Galvanized sheet pickling treatment device

Info

Publication number: CN219951223U
Application number: CN202320771286.8U
Authority: CN
Inventors: 许茂良
Original assignee: Hangzhou Yanke Technology Co ltd
Current assignee: Jiangsu Wudu Power Equipment Co ltd
Priority date: 2023-04-10
Filing date: 2023-04-10
Publication date: 2023-11-03
Anticipated expiration: 2033-04-10

Abstract

The utility model relates to the technical field of galvanized sheet pickling equipment, and discloses a galvanized sheet pickling treatment device which comprises a pickling tank, wherein a falling object opening is fixedly formed in the middle of the upper end of the pickling tank, first supporting frames are fixedly connected to the middle of two sides of the upper end of the pickling tank, sliding rails are fixedly formed on opposite sides of the two first supporting frames, first positioning rods are fixedly connected between the upper inner wall and the lower inner wall of the two sliding rails, positioning sliding blocks are sleeved on the outer walls of the two first positioning rods in a sliding mode, connecting plates are fixedly connected between the opposite sides of the two positioning sliding blocks, and supporting plates are fixedly connected to the upper ends of the two first supporting frames. According to the utility model, automatic immersion pickling and salvaging of the plate main body can be realized by starting the electric telescopic rod, the pickling liquid near the plate main body can be slowly stirred by starting the driving motor, so that the concentration of the pickling liquid near the plate main body is kept stable, and the acid gas can be neutralized by the alkali liquor in the alkali liquor box.

Description

Galvanized sheet pickling treatment device

Technical Field

The utility model relates to the technical field of galvanized sheet pickling equipment, in particular to a galvanized sheet pickling treatment device.

Background

The method of removing scale and rust on the surface of steel using an acid solution is called pickling, and is one method of cleaning the surface of metal, most commonly sulfuric acid and hydrochloric acid.

Traditional pickling mode is for directly placing the sheet material in the pickling tank, but a lot of acidizing fluid often all have volatility, volatilizees to the air when the acidizing fluid, will corrode wall body, factory building structure, wall skin, roofing and electromechanical device, harm workman's health, pollute the atmosphere, simultaneously directly place the galvanized sheet in the pickling tank, after the acidizing fluid reacts with partial oxide skin on the face, the acidizing fluid concentration reduces on every side to influence the pickling effect, consequently, the skilled person provides a galvanized sheet pickling processing apparatus in order to solve the problem that proposes among the above-mentioned background art.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides the galvanized sheet pickling treatment device which can automatically sink into and pickle a sheet main body through the arrangement of the automatic lifting mechanism, does not need to be manually put into or salvaged, ensures that the concentration of pickling solution near the sheet main body is kept stable through the arrangement of the stirring mechanism in the device, can accelerate the pickling speed, save time and improve the working efficiency, and can effectively purify volatilized acid gas through the arrangement of the waste gas treatment device, thereby avoiding air pollution.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the galvanized sheet pickling treatment device comprises a pickling tank, wherein a falling object opening is fixedly formed in the middle of the upper end of the pickling tank, first supporting frames are fixedly connected to the middle of two sides of the upper end of the pickling tank, sliding rails are fixedly formed in opposite sides of the two first supporting frames, first positioning rods are fixedly connected between the upper inner wall and the lower inner wall of the two sliding rails, positioning sliding blocks are fixedly sleeved on the outer walls of the two first positioning rods in a sliding manner, connecting plates are fixedly connected between opposite sides of the two positioning sliding blocks, supporting plates are fixedly connected to the upper ends of the first supporting frames, electric telescopic rods are fixedly arranged at the centers of the upper ends of the supporting plates, fixing plates are fixedly connected to the lower ends of the fixing plates, clamping grooves are fixedly formed in the centers of the front inner wall and the rear inner wall of the clamping grooves, two threaded rods are rotatably connected to the centers of the front inner wall and the rear inner wall of the two threaded rods, sliding clamping plates are fixedly sleeved on the outer walls of the two threaded rods, and a sheet main body is arranged between the two sliding clamping plates;

the middle part of the lower end of the pickling tank is fixedly connected with a transmission tank, a transmission shaft and a driven shaft are respectively connected between the upper inner wall and the lower inner wall of the transmission tank in a rotating way and are respectively connected with the front and the rear, the outer walls of the transmission shaft and the driven shaft are respectively fixedly sleeved with a first belt wheel and a second belt wheel, a transmission belt is fixedly sleeved between the outer walls of the first belt wheel and the second belt wheel, the upper ends of the transmission shaft and the driven shaft penetrate through the pickling tank and are fixedly connected with a stirring rod, and a driving motor is fixedly arranged at the front part of the lower end of the transmission tank;

through above-mentioned technical scheme, will wait to pickling sheet material main part and put between two slip splint, control two slip splint through rotating two-way threaded rod and move in opposite directions and carry out fixed centre gripping to the sheet material main part, can drive the connecting plate and go up and down the removal via two location sliders through starting electric telescopic handle, and then can realize sinking pickling and salvaging to the sheet material main part, the centre gripping is simple, convenient operation, controls two puddlers through starting driving motor and carries out slow rotation stirring in sheet material main part both sides for the pickling liquid concentration near the sheet material main part remains stable.

Further, a first air pump is fixedly arranged at the position, close to the upper part, of one side of the pickling tank, a first air pump is fixedly connected between the first air pump and the pickling tank, an alkali liquor tank is fixedly connected at the position, close to the rear, of the upper end of the pickling tank, a first exhaust pipe is fixedly connected between the alkali liquor tank and the first air pump, a one-way valve is fixedly arranged on the first exhaust pipe, an alkaline detector is fixedly arranged at the position, close to the lower part, of one side, far from the first exhaust pipe, of the alkali liquor tank, a second support frame is fixedly connected at the position, close to the alkali liquor tank, of the upper end of the pickling tank, a second air pump is fixedly arranged at the position, close to the upper part, of the second air pump, a second air pump is fixedly connected between the second air pump and the alkali liquor tank, and a second exhaust pipe is fixedly connected at the position, close to the side, far from the second air pump, of the second air pump;

through above-mentioned technical scheme, through being provided with first aspiration pump on the pickling tank, can be through first exhaust tube and first blast pipe with the acid gas that produces in the pickling tank into the lye incasement, the lye through the lye in the lye incasement is neutralized, outwards discharge through second aspiration pump through second exhaust tube and second blast pipe, still add alkaline detector simultaneously on the lye case, can detect the alkaline degree of lye in the lye case through alkaline detector to operating personnel can in time change the lye in the lye case, with ensure that the neutralization effect can realize.

Further, a sealing gasket is fixedly sleeved between the upper part of the outer wall of the fixing plate and the connecting plate, and the fixing plate and the sealing gasket are both clamped with the falling object opening;

through above-mentioned technical scheme, through being equipped with sealed pad on the outer wall of fixed plate, with falling thing mouth block when the fixed plate whereabouts, through sealed effect of pad simultaneously, strengthen the leakproofness of pickling case to prevent that acid gas from escaping.

Further, a liquid discharge pipe is fixedly connected to the lower part of one side of the first air pump far away from the pickling tank, and a control valve is fixedly arranged on the liquid discharge pipe;

through above-mentioned technical scheme, when the liquid in the pickling tank needs to be changed, through the fluid-discharge tube that is equipped with and open the control valve, can outwards discharge the liquid in the pickling tank.

Further, the output end of the electric telescopic rod penetrates through the supporting plate and is fixedly connected with the connecting plate, and the two positioning sliding blocks are arranged in a sliding mode in the corresponding sliding rails;

through above-mentioned technical scheme, can drive the connecting plate through two location sliders through starting electric telescopic handle and go up and down to remove.

Further, a second positioning rod is fixedly connected to the position close to two sides between the front inner wall and the rear inner wall of the clamping groove, and two sides of the two sliding clamping plates are respectively sleeved on the corresponding second positioning rods in a sliding manner;

through above-mentioned technical scheme, establish two slip splint slip cap on corresponding second locating lever through, can make two slip splints more stable when removing, fixed effect is also better.

Further, the output end of the driving motor penetrates through the transmission box and is fixedly connected with the transmission shaft, and an acid detector is fixedly arranged in the middle of one side of the pickling box, which is close to the first air extracting pump;

through above-mentioned technical scheme, can drive the transmission shaft through starting driving motor and rotate, through being equipped with the acidity detector on the pickling case, can be convenient for operating personnel observe the acidity degree of pickling incasement liquid, and then can in time change to ensure the validity of pickling process.

Further, an activated carbon filter plate is fixedly arranged between the inner walls of the second exhaust pipes and far from the second air pump, and a sponge filter plate is fixedly arranged on one side of the activated carbon filter plate, far from the second air pump;

through above-mentioned technical scheme, through add active carbon filter and sponge filter in the second blast pipe, can carry out filtration once more to the gas of alkali lye incasement, the dual guarantee avoids causing the pollution to the air.

The utility model has the following beneficial effects:

1. according to the galvanized sheet pickling treatment device, the automatic lifting mechanism is arranged, namely, the sheet material main body to be pickled is placed between the two sliding clamping plates, the two sliding clamping plates are controlled to move in opposite directions to fixedly clamp the sheet material main body by rotating the bidirectional threaded rod, the connecting plate can be driven to lift and move through the two positioning sliding blocks by starting the electric telescopic rod, and further the sheet material main body can be immersed in and pickled and salvaged.

2. According to the galvanized sheet pickling treatment device, the stirring mechanism is arranged in the device, when the sheet main body is immersed in pickling, the driving motor is started to drive the transmission shaft and the first belt wheel to rotate, and the second belt wheel and the driven shaft are further rotated through the transmission belt, so that the two stirring rods are slowly rotated and stirred on two sides of the sheet main body, the concentration of pickling solution near the sheet main body is kept stable, the pickling speed can be increased, the time is saved, and the working efficiency is improved.

3. According to the galvanized sheet pickling treatment device, the waste gas treatment device is arranged, namely, acid gas generated in the pickling tank is discharged into the alkali liquor tank through the first air suction pipe and the first exhaust pipe by the first air suction pump, alkali liquor in the alkali liquor tank is neutralized, the acid gas is discharged outwards through the second air suction pipe and the second exhaust pipe by the second air suction pump, and meanwhile, the acid gas is filtered again through the active carbon filter plate and the sponge filter plate, so that the volatilized acid gas is finally and effectively purified, the air pollution is avoided, and meanwhile, the physical health of staff is guaranteed.

Drawings

FIG. 1 is a schematic front sectional view of a galvanized sheet pickling device according to the present utility model;

FIG. 2 is an enlarged schematic view of the structure shown at A in FIG. 1;

FIG. 3 is a schematic axial view of a fixing plate of a galvanized sheet pickling device according to the present utility model;

FIG. 4 is a schematic side sectional view of a fixing plate of a galvanized sheet pickling device according to the present utility model;

FIG. 5 is a schematic side view of a galvanized sheet pickling device according to the present utility model;

FIG. 6 is a schematic view of a galvanized sheet pickling apparatus according to the present utility model;

fig. 7 is an enlarged schematic view of the structure at B in fig. 6.

Legend description:

1. a pickling tank; 2. a falling port; 3. a first support frame; 4. a slide rail; 5. a first positioning rod; 6. positioning a sliding block; 7. a connecting plate; 8. a support plate; 9. an electric telescopic rod; 10. a fixing plate; 11. a sealing gasket; 12. a transmission case; 13. a transmission shaft; 14. a first pulley; 15. a driven shaft; 16. a second pulley; 17. a transmission belt; 18. a driving motor; 19. a stirring rod; 20. a first exhaust pipe; 21. a first air pump; 22. a first exhaust pipe; 23. a one-way valve; 24. an alkali liquor tank; 25. a second exhaust pipe; 26. an alkaline detector; 27. a second support frame; 28. a second air pump; 29. a second exhaust pipe; 30. an activated carbon filter plate; 31. a sponge filter plate; 32. a liquid discharge pipe; 33. a control valve; 34. an acidity detector; 35. a plate main body; 36. a clamping groove; 37. a two-way threaded rod; 38. a second positioning rod; 39. sliding clamping plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, one embodiment provided by the present utility model is: the galvanized sheet pickling treatment device comprises a pickling tank 1, wherein a falling object port 2 is fixedly formed in the middle of the upper end of the pickling tank 1, first supporting frames 3 are fixedly connected to the middle of two sides of the upper end of the pickling tank 1, sliding rails 4 are fixedly formed on opposite sides of the two first supporting frames 3, first positioning rods 5 are fixedly connected between the upper inner wall and the lower inner wall of the two sliding rails 4, positioning sliding blocks 6 are fixedly sleeved on the outer walls of the two first positioning rods 5 in a sliding manner, connecting plates 7 are fixedly connected between opposite sides of the two positioning sliding blocks 6, supporting plates 8 are fixedly connected to the upper ends of the two first supporting frames 3, electric telescopic rods 9 are fixedly arranged at the center of the upper ends of the supporting plates 8, fixing plates 10 are fixedly connected to the lower ends of the connecting plates 7, clamping grooves 36 are fixedly formed in the lower ends of the fixing plates 10, bidirectional threaded rods 37 are rotatably connected to the positions close to the center between the front inner walls and the rear inner walls of the clamping grooves 36, sliding clamping plates 39 are fixedly sleeved on the front walls and the rear sides of the outer walls of the bidirectional threaded rods 37, and a sheet main body 35 is arranged between the two sliding plates 39;

the middle part of the lower extreme of the pickling tank 1 is fixedly connected with a transmission case 12, a transmission shaft 13 and a driven shaft 15 are respectively connected between the upper inner wall and the lower inner wall of the transmission case 12 in a rotating way near the front and the rear, a first belt pulley 14 and a second belt pulley 16 are respectively fixedly sleeved on the outer walls of the transmission shaft 13 and the driven shaft 15, a transmission belt 17 is fixedly sleeved between the outer walls of the first belt pulley 14 and the second belt pulley 16, the upper ends of the transmission shaft 13 and the driven shaft 15 penetrate through the pickling tank 1 and are fixedly connected with a stirring rod 19, and a driving motor 18 is fixedly arranged at the lower end of the transmission case 12 near the front.

A first air pump 21 is fixedly arranged on one side of the pickling tank 1 near the upper part, a first air pump 20 is fixedly connected between the first air pump 21 and the pickling tank 1, an alkali liquor tank 24 is fixedly connected on the upper end of the pickling tank 1 near the rear part, a first exhaust pipe 22 is fixedly connected between the alkali liquor tank 24 and the first air pump 21, a one-way valve 23 is fixedly arranged on the first exhaust pipe 22, an alkaline detector 26 is fixedly arranged on the lower part of one side of the alkali liquor tank 24 far away from the first exhaust pipe 22, a second support frame 27 is fixedly connected on the upper end of the pickling tank 1 near the alkali liquor tank 24, a second air pump 28 is fixedly arranged on the upper part of the second support frame 27, a second air pump 25 is fixedly connected on one side of the second air pump 28 far away from the second air pump 25, a second exhaust pipe 29 is fixedly connected on one side of the second air pump 28 far away from the second air pump 25, by arranging the first air pump 21 on the pickling tank 1, the acid gas generated in the acid washing tank 1 can be discharged into the alkali liquor tank 24 through the first exhaust pipe 20 and the first exhaust pipe 22, the alkali liquor in the alkali liquor tank 24 is neutralized, the acid gas is discharged outwards through the second exhaust pipe 25 and the second exhaust pipe 29 through the second exhaust pipe 28, meanwhile, the alkali liquor tank 24 is additionally provided with the alkali detector 26, the alkali degree of the alkali liquor in the alkali liquor tank 24 can be detected through the alkali detector 26, so that an operator can replace the alkali liquor in the alkali liquor tank 24 in time, the neutralization effect can be realized, the sealing gasket 11 is fixedly sleeved between the upper part of the outer wall of the fixed plate 10 and the connecting plate 7, the fixed plate 10 and the sealing gasket 11 are both clamped with the falling object port 2, the sealing gasket 11 is arranged on the outer wall of the fixed plate 10, the fixed plate 10 is clamped with the falling object port 2 when falling, and meanwhile, the effect of the sealing gasket 11 is realized, the tightness of the pickling tank 1 is enhanced so as to prevent the escape of acid gas, a liquid discharge pipe 32 is fixedly connected to the lower part of one side of the first air pump 21 away from the pickling tank 1, a control valve 33 is fixedly arranged on the liquid discharge pipe 32, when the liquid in the pickling tank 1 needs to be replaced, the liquid in the pickling tank 1 can be discharged outwards through the liquid discharge pipe 32 arranged and the control valve 33 opened, the output end of an electric telescopic rod 9 penetrates through a supporting plate 8 and is fixedly connected with a connecting plate 7, two positioning sliding blocks 6 are arranged in sliding mode in corresponding sliding rails 4, the connecting plate 7 can be driven to move up and down through the two positioning sliding blocks 6 by starting the electric telescopic rod 9, a second positioning rod 38 is fixedly connected to the position close to two sides between the front inner wall and the rear inner wall of a clamping groove 36, two sides of two sliding clamping plates 39 are respectively sleeved on the corresponding second positioning rods 38 in a sliding mode, through the sliding sleeve of the two sliding clamping plates 39 on the corresponding second positioning rods 38, the two sliding clamping plates 39 are more stable when moving, the fixing effect is better, the output end of the driving motor 18 penetrates through the transmission box 12 and is fixedly connected with the transmission shaft 13, the middle part of one side of the pickling tank 1, which is close to the first air pump 21, is fixedly provided with the acid detector 34, the transmission shaft 13 can be driven to rotate by starting the driving motor 18, the acid detector 34 is arranged on the pickling tank 1, operators can conveniently observe the acidity degree of liquid in the pickling tank 1, and further, the replacement can be carried out in time, so as to ensure the effectiveness of the pickling process, the active carbon filter plate 30 is fixedly arranged at the position, which is far away from the second air pump 28, between the inner walls of the second exhaust pipe 29, the active carbon filter plate 30 is fixedly provided with the sponge filter plate 31, which is far away from the second air pump 28, by adding the activated carbon filter plate 30 and the sponge filter plate 31 in the second exhaust pipe 29, the gas in the alkali liquor tank 24 can be filtered again, and the double guarantee is avoided from polluting the air.

Working principle: when the device is used, the plate main body 35 to be pickled is placed between the two sliding clamping plates 39, the two sliding clamping plates 39 are controlled to move in opposite directions through the rotating bidirectional threaded rod 37 to fixedly clamp the plate main body 35, the connecting plate 7 can be driven by the starting electric telescopic rod 9 to sink into the pickling tank 1 through the two positioning sliding blocks 6 to be pickled, the driving motor 18 is started to drive the transmission shaft 13 and the first belt pulley 14 to rotate, and then the second belt pulley 16 and the driven shaft 15 are driven by the driving belt 17 to rotate, so that the two stirring rods 19 are slowly rotated and stirred on two sides of the plate main body 35, the concentration of pickling liquid near the plate main body 35 is kept stable, meanwhile, acid gas generated in the pickling tank 1 is discharged into the alkaline tank 24 through the starting of the first air pump 21 and the first exhaust pipe 22, the alkaline gas in the alkaline tank 24 is neutralized, the second air pump 28 is discharged outwards through the second air pipe 25 and the second exhaust pipe 29, and the second belt pulley 30 and the sponge 31 are filtered again at the same time, finally, the acid gas is effectively purified, and the alkaline gas detector is correspondingly arranged on the pickling tank 1 and the alkaline detector 26, and the alkaline detector is replaced by the alkaline detector, and the alkaline detector is also provided with an alkaline detector 34, and the alkaline detector is used for detecting the alkaline detector.

Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a galvanized sheet pickling processing apparatus, includes pickling case (1), its characterized in that: the automatic pickling device comprises a pickling tank (1), a first support frame (3) and a second support frame (3), wherein a falling object port (2) is fixedly formed in the middle of the upper end of the pickling tank (1), the first support frame (3) is fixedly connected to the middle of the two sides of the upper end of the pickling tank (1), sliding rails (4) are fixedly formed in the opposite sides of the first support frame (3), first positioning rods (5) are fixedly connected between the upper inner wall and the lower inner wall of the sliding rails (4), positioning sliding blocks (6) are fixedly connected to the outer walls of the first positioning rods (5), a connecting plate (7) is fixedly connected between the opposite sides of the two positioning blocks (6), an electric telescopic rod (9) is fixedly arranged at the center of the upper end of the supporting plate (8), a fixing plate (10) is fixedly connected to the lower end of the connecting plate (7), clamping grooves (36) are fixedly formed in the lower end of the fixing plate (10), two-way threaded rods (37) are rotatably connected to the positions, close to the center, between the front inner walls and the two side walls of the clamping grooves (36), and two-way threaded rods (37) are fixedly connected to the two-way threaded rods (39) and are fixedly connected to the main body (39);

the pickling tank is characterized in that a transmission case (12) is fixedly connected to the middle of the lower end of the pickling tank (1), a transmission shaft (13) and a driven shaft (15) are respectively connected between the upper inner wall and the lower inner wall of the transmission case (12) in a front-back rotating mode, a first belt wheel (14) and a second belt wheel (16) are respectively fixedly sleeved on the outer walls of the transmission shaft (13) and the driven shaft (15), a transmission belt (17) is fixedly sleeved between the outer walls of the first belt wheel (14) and the second belt wheel (16), the upper ends of the transmission shaft (13) and the driven shaft (15) penetrate through the pickling tank (1) and are fixedly connected with a stirring rod (19), and a driving motor (18) is fixedly arranged at the lower end of the transmission case (12) near the front.

2. The galvanized sheet pickling treatment device according to claim 1, characterized in that: the pickling tank is characterized in that a first air suction pump (21) is fixedly arranged on one side of the pickling tank (1) near the upper part, a first air suction pipe (20) is fixedly connected between the first air suction pump (21) and the pickling tank (1), an alkali liquor tank (24) is fixedly connected on the upper part near the rear part of the pickling tank (1), a first exhaust pipe (22) is fixedly connected between the alkali liquor tank (24) and the first air suction pump (21), a one-way valve (23) is fixedly arranged on the first exhaust pipe (22), an alkaline detector (26) is fixedly arranged on one side, far away from the first exhaust pipe (22), of the alkali liquor tank (24) near the lower part, a second support frame (27) is fixedly connected on the upper end of the pickling tank (1), a second air suction pipe (28) is fixedly connected on the upper part between the second support frame (28) and the alkali liquor tank (24), and a second exhaust pipe (29) is fixedly connected on one side, far away from the second exhaust pipe (25).

3. The galvanized sheet pickling treatment device according to claim 1, characterized in that: sealing gaskets (11) are fixedly sleeved between the upper part of the outer wall of the fixing plate (10) and the connecting plate (7), and the fixing plate (10) and the sealing gaskets (11) are clamped with the falling object openings (2).

4. The galvanized sheet pickling treatment device according to claim 1, characterized in that: a liquid discharge pipe (32) is fixedly connected to the lower part of one side of the first air extracting pump (21) far away from the pickling tank (1), and a control valve (33) is fixedly arranged on the liquid discharge pipe (32).

5. The galvanized sheet pickling treatment device according to claim 1, characterized in that: the output end of the electric telescopic rod (9) penetrates through the supporting plate (8) and is fixedly connected with the connecting plate (7), and the two positioning sliding blocks (6) are arranged in a sliding mode in the corresponding sliding rail (4).

6. The galvanized sheet pickling treatment device according to claim 1, characterized in that: the two sides of the two sliding clamping plates (39) are respectively sleeved on the corresponding second positioning rods (38) in a sliding way.

7. The galvanized sheet pickling treatment device according to claim 1, characterized in that: the output end of the driving motor (18) penetrates through the transmission case (12) and is fixedly connected with the transmission shaft (13), and an acid detector (34) is fixedly arranged in the middle of one side of the pickling case (1) close to the first air extracting pump (21).

8. The galvanized sheet pickling treatment device according to claim 2, characterized in that: an activated carbon filter plate (30) is fixedly arranged between the inner walls of the second exhaust pipes (29) far away from the second air pump (28), and a sponge filter plate (31) is fixedly arranged on one side, far away from the second air pump (28), of the activated carbon filter plate (30).