Domestic sewage integrated treatment device

Abstract

The domestic sewage integrated treatment device comprises a treatment box, a sewage inlet pipe is arranged at the top of one end of the treatment box, a first cavity and a second cavity are formed in the treatment box, a first water conveying pipe is arranged on one side wall of the first cavity, and a second water conveying pipe is arranged on one side wall of the second cavity. Sewage is input into the treatment box through a sewage inlet pipe and falls onto an inclined surface block and a filter plate, the filter plate and an arc-shaped baffle plate form a storage tank after being laid flat, the sewage enters the storage tank, solid-liquid separation is performed through the filter plate, liquid sewage is discharged downwards, and solid garbage stays on the filter plate, so that subsequent degradation is facilitated; and the arranged driving assembly can drive the filter plate to move, the filter plate is inclined, one end of the filter plate moves to the top of the arc-shaped baffle, at the moment, solid garbage on the filter plate can slide into the storage box, then degradation treatment is facilitated, and the filter plate is prevented from being blocked.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment devices, and in particular to an integrated domestic wastewater treatment device. Background Technology

[0002] Existing domestic wastewater treatment equipment mainly consists of a hydrolysis acidification tank, a contact oxidation tank, and a secondary sedimentation tank connected in series, either combined into a single tank or as multiple independent tanks, and arranged underground or above ground. The effluent from the secondary sedimentation tank is then pumped and sequentially fed into an independent tank-type biological filter and an independent tank-type filter for further treatment, ultimately meeting the water quality requirements for reuse or discharge.

[0003] The prior art can be referenced from Chinese authorized utility model patent with publication number CN210528709U, which is specifically an integrated domestic sewage treatment device, including a tank. An inlet pipe is provided on one side of the tank, and an outlet pipe is provided on the other side. The tank is characterized by being sequentially divided into a filtration backwashing zone, an aerobic / anoxic reaction zone, and an anaerobic reaction zone. The filtration backwashing zone contains ferrous sulfate quartz sand packing for sewage purification. A drain pipe is located on the tank below the inlet pipe. A first water passage pipe is provided between the filtration backwashing zone and the aerobic / anoxic reaction zone. The aerobic / anoxic reaction zone contains solidified microbial packing, with aeration pipes evenly distributed and layered within the packing. A filter screen is provided in the aerobic / anoxic reaction zone. A second water passage pipe is provided between the aerobic / anoxic reaction zone and the anaerobic reaction zone. The anaerobic reaction zone contains ecological ceramsite packing, with an ultraviolet germicidal lamp tube installed on top.

[0004] The aforementioned existing technology has the following shortcomings in actual implementation: it cannot perform solid-liquid separation and cannot separate large pieces of debris and garbage from sewage, such as plastic bags, which enter the subsequent degradation components and affect the degradation efficiency. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes an integrated domestic sewage treatment device to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides an integrated domestic sewage treatment device comprising: a treatment tank, an inlet pipe provided at the top of one end of the treatment tank, a first chamber and a second chamber provided inside the treatment tank, a first water supply pipe provided on one side wall of the first chamber, a second water supply pipe provided on one side wall of the second chamber, a drain pipe provided at the other end of the treatment tank, the drain pipe communicating with the second chamber, and a solidified microbial packing material provided inside the second chamber; An inclined block is provided inside one end of the processing box, and an arc-shaped baffle is provided at the top of one end of the processing box. A filter plate is rotatably provided at the top of one end of the inclined block, and one end of the filter plate is in contact with the arc-shaped baffle. The processing box is equipped with a drive assembly, which is connected to the filter plate and is used to drive the filter plate to move. A storage box is provided at one end of the processing box, the storage box is connected to the interior of the processing box, and a second extraction pipe is provided at the top of the storage box; The top of the processing box is provided with two first extraction pipes, one of which is connected to the first chamber.

[0007] Furthermore, an aeration pipe is provided at the top of the second chamber, with one end of the aeration pipe extending out of the interior of the second chamber.

[0008] Furthermore, the drive assembly includes a second sleeve disposed inside the inclined block, a first piston disc slidably disposed inside the second sleeve, a first sleeve rod disposed on one side of the first piston disc, a second sleeve rod disposed inside the first sleeve rod, an oil tank disposed on one side of the processing box, an oil pump disposed inside the oil tank, and an oil delivery pipe connected to the output end of the oil pump. The inclined block is provided with a second oil pipe inside, one end of the oil delivery pipe is connected to the second oil pipe, the second oil pipe is connected to the bottom of the second sleeve, and a second solenoid valve is provided on the second oil pipe; The processing box is equipped with a material pushing component, which is connected to the drive component.

[0009] Furthermore, the bottom of the first connecting rod is open and extends through the first piston disc.

[0010] Furthermore, a cleaning channel is formed between the inner wall of one end of the processing box and the inclined block and the arc-shaped baffle; The material pushing assembly includes a first sleeve cylinder disposed on the top of the processing box, a third sleeve rod slidably disposed inside the first sleeve cylinder, and a fourth sleeve rod disposed at one end of the third sleeve rod. One end of the fourth sleeve rod extends into the interior of the cleaning channel and is connected to a push plate. One end of the oil pipeline is connected to a first oil pipe, one end of the first oil pipe passes through the processing box and connects to the top of the first sleeve, and the other end of the first oil pipe is provided with a third solenoid valve, and the first oil pipe is provided with a first solenoid valve.

[0011] Furthermore, a second piston disc is slidably disposed inside the first sleeve, the third sleeve rod is disposed on the second water supply pipe, and a first spring is disposed at the inner top of the first sleeve, the first spring being connected to the second piston disc; One end of the third connecting rod is open and penetrates through the second piston disc, and the fourth connecting rod is slidably disposed inside the third connecting rod.

[0012] Furthermore, a second spring is provided at the inner bottom of the first sleeve, and one end of the second spring is connected to the fourth sleeve rod.

[0013] Furthermore, a stop block is provided at the bottom of the arc-shaped baffle.

[0014] Furthermore, a cutting box is provided at one end of the storage box, and a crushing component is provided inside the cutting box.

[0015] Furthermore, the crushing assembly includes two cutting shafts rotatably disposed inside the cutting box and a plurality of cutting blades disposed on the outer wall of the cutting shafts; The top of the storage box is equipped with a drive motor, and pulleys are provided on the output end of the drive motor and on one side of the outer wall of the storage box. The two pulleys are connected to a synchronous belt. The pulleys rotatably arranged on one side of the outer wall of the storage box are fixedly connected to one end of one of the cutting shafts. A protective box is provided on the other side of the storage box. Inside the protective box, two gears are arranged to rotate relative to each other. The two gears mesh with each other, and the two cutting shafts are fixedly connected to the two gears respectively.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Wastewater is fed into the treatment tank through the inlet pipe and falls onto the inclined block and filter plate. After the filter plate is laid flat, it forms a storage tank with the arc-shaped baffle. Wastewater enters the storage tank and undergoes solid-liquid separation through the filter plate. The liquid waste is discharged downwards, while the solid waste remains on the filter plate for subsequent degradation. The filter plate can be moved by the set drive component, causing it to tilt and move one end to the top of the arc-shaped baffle. At this time, the solid waste on the filter plate can slide into the storage tank, which facilitates degradation treatment and prevents the filter plate from clogging.

[0017] 2. When it is necessary to clean the debris on the filter plate, start the oil pump to draw the hydraulic oil from the oil tank into the oil delivery pipe, and then input the hydraulic oil into the second oil pipe through the oil delivery pipe, and finally into the second set of connecting rods. The hydraulic oil enters the first set of connecting rods and pushes out the second set of connecting rods to move, thereby driving the filter plate to move. When the second set of connecting rods moves to its end, the hydraulic oil pushes the first set of connecting rods to move, which facilitates further movement of the filter plate.

[0018] 3. When hydraulic oil is introduced into the second sleeve, the solenoid valve on the first oil pipe is activated to block the first oil pipe, allowing hydraulic oil to enter only the second sleeve. After the filter plate is tilted, the second solenoid valve on the second oil pipe is closed, and the third solenoid valve on the first oil pipe is opened, allowing hydraulic oil to be transported through the first oil pipe into the first sleeve and into the third sleeve rod, driving the fourth sleeve rod to move. The fourth sleeve rod then moves the push plate, which pushes the debris on the filter plate into the storage tank, facilitating debris removal and preventing filter plate blockage.

[0019] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the processing box in this invention; Figure 4 This is a partial structural schematic diagram of the processing box in this invention; Figure 5 This is a schematic diagram of the internal structure of the inclined block in this invention; Figure 6 This is a schematic diagram of the oil pipeline structure in this invention; Figure 7 This is a schematic diagram of the internal structure of the protective box in this invention; Figure 8 This is an appendix to the present invention. Figure 4 Enlarged view of A in the middle; Figure 9 This is a schematic diagram of the internal structure of the first sleeve in this invention.

[0021] In the diagram: 1. Processing tank; 2. Storage tank; 3. Inlet pipe; 4. First extraction pipe; 5. Aeration pipe; 6. Second extraction pipe; 7. First connecting sleeve; 8. First oil pipe; 9. First solenoid valve; 10. Drive motor; 11. Protection box; 12. Pulley; 13. Synchronous belt; 14. Oil tank; 15. Oil delivery pipe; 16. First chamber; 17. First water delivery pipe; 18. Second chamber; 19. Second water delivery pipe; 20. Solidified microbial packing material; 21. Drainage pipe; 22. Inclined block; 3. Arc-shaped baffle; 24. Filter plate; 25. Second connecting sleeve; 26. Cleaning channel; 27. Push plate; 28. Cutting shaft; 29. ​​Cutting blade; 30. Cutting box; 31. First piston disc; 32. First connecting rod; 33. Second connecting rod; 34. Second oil pipe; 35. Second solenoid valve; 36. Third solenoid valve; 37. Gear; 38. Stop block; 39. Second piston disc; 40. Third connecting rod; 41. Fourth connecting rod; 42. First spring; 43. Second spring. Detailed Implementation

[0022] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described with reference to the accompanying drawings. However, the scope of protection of the present invention is not limited to the following description.

[0023] Reference Figure 1-9 As shown, an integrated domestic sewage treatment device includes: a treatment tank 1, an inlet pipe 3 is provided at the top of one end of the treatment tank 1, a first chamber 16 and a second chamber 18 are provided inside the treatment tank 1, a first water supply pipe 17 is provided on one side wall of the first chamber 16, a second water supply pipe 19 is provided on one side wall of the second chamber 18, a drain pipe 21 is provided at the other end of the treatment tank 1, the drain pipe 21 is connected to the second chamber 18, and a solidified microbial packing material 20 is provided inside the second chamber 18; An inclined block 22 is provided inside one end of the processing box 1, and an arc-shaped baffle 23 is provided at the top of one end of the processing box 1. A filter plate 24 is rotatably provided at the top of one end of the inclined block 22, and one end of the filter plate 24 contacts the arc-shaped baffle 23. A drive assembly is provided inside the processing box 1, and the drive assembly is connected to the filter plate 24 to drive the filter plate 24 to move. A storage box 2 is provided at one end of the processing box 1, and the storage box 2 is connected to the interior of the processing box 1. A second extraction pipe 6 is provided at the top of the storage box 2. Two first extraction pipes 4 are provided at the top of the processing box 1, and one of the first extraction pipes 4 is connected to the first chamber 16. An aeration pipe 5 is provided at the top of the inner chamber 18, with one end of the aeration pipe 5 extending out of the interior of the second chamber 18.

[0024] The present invention provides a technical solution in which, during use, the treatment tank 1 is buried underground, and sewage is introduced into the interior of the treatment tank 1 through the sewage inlet pipe 3, falling onto the inclined block 22 and the filter plate 24. After the filter plate 24 is laid flat, it forms a storage tank with the arc-shaped baffle 23. The sewage enters the interior of the storage tank and undergoes solid-liquid separation through the filter plate 24. The liquid sewage is discharged downwards, while the solid waste remains on the filter plate 24 for subsequent degradation. The filter plate 24 can be moved by the set driving component, causing the filter plate 24 to tilt and move one end to the top of the arc-shaped baffle 23. At this time, the solid waste on the filter plate 24 can slide into the interior of the storage tank 2, thereby facilitating degradation treatment and preventing the filter plate 24 from becoming clogged. Wastewater can be pumped into the first chamber 16 through the first water supply pipe 17, and then into the second chamber 18 through the second water supply pipe 19. The solidified microbial packing material 20 inside the second chamber 18 decomposes particulate matter in the wastewater. Aeration pipe 5 provides aeration to the second chamber 18, facilitating degradation. The settled wastewater is discharged through the drain pipe 21. The first and second extraction pipes 4 and 6 facilitate the removal of waste from the treatment tank 1 and storage tank 2.

[0025] Preferably, the drive assembly includes a second sleeve 25 disposed inside the inclined block 22, a first piston disc 31 slidably disposed inside the second sleeve 25, a first sleeve rod 32 disposed on one side of the first piston disc 31, a second sleeve rod 33 disposed inside the first sleeve rod 32, an oil tank 14 disposed on one side of the processing box 1, an oil pump disposed inside the oil tank 14, and an oil delivery pipe 15 connected to the output end of the oil pump. The inclined block 22 is equipped with a second oil pipe 34. One end of the oil pipe 15 is connected to the second oil pipe 34. The second oil pipe 34 is connected to the bottom of the second sleeve 25. A second solenoid valve 35 is installed on the second oil pipe 34. The processing box 1 is equipped with a pushing assembly. The pushing assembly is connected to the driving assembly. The bottom of the first sleeve rod 32 is open and passes through the first piston disc 31.

[0026] Specifically, when it is necessary to clean the debris on the filter plate 24, the oil pump is started to draw the hydraulic oil from the oil tank 14 into the oil delivery pipe 15, and then the hydraulic oil is input into the second oil pipe 34 through the oil delivery pipe 15, and finally into the second set of connecting rods 25. It enters the first set of connecting rods 32 and pushes out the second set of connecting rods 33 to move, thereby driving the filter plate 24 to move. When the second set of connecting rods 33 moves to its end, the hydraulic oil pushes the first set of connecting rods 32 to move, which facilitates further movement of the filter plate 24.

[0027] Preferably, a cleaning channel 26 is formed between the inner wall of one end of the processing box 1, the inclined block 22, and the arc-shaped baffle 23; The material pushing assembly includes a first sleeve 7 set at the top of the processing box 1, a third sleeve rod 40 slidably set inside the first sleeve 7, and a fourth sleeve rod 41 set at one end of the third sleeve rod 40. One end of the fourth sleeve rod 41 extends into the interior of the cleaning channel 26 and is connected to a push plate 27. One end of the oil pipeline 15 is connected to the first oil pipeline 8. One end of the first oil pipeline 8 passes through the processing box 1 and connects to the top of the first sleeve cylinder 7. The other end of the first oil pipeline 8 is equipped with a third solenoid valve 36, and the first oil pipeline 8 is equipped with a first solenoid valve 9.

[0028] Specifically, when hydraulic oil is introduced into the second connecting sleeve 25, the solenoid valve on the first oil pipe 8 is activated, blocking the first oil pipe 8 and allowing hydraulic oil to enter only the second connecting sleeve 25. After the filter plate 24 tilts, the second solenoid valve 35 on the second oil pipe 34 is closed, and the third solenoid valve 36 on the first oil pipe 8 is opened, allowing hydraulic oil to be transported through the first oil pipe 8 into the first connecting sleeve 7 and into the third connecting rod 40. This drives the fourth connecting rod 41 to move, which in turn moves the push plate 27, pushing the debris on the filter plate 24 into the storage tank 2, facilitating debris removal and preventing filter plate 24 from clogging. When the fourth connecting rod 41 reaches its end, the hydraulic oil continues to push the third connecting rod 40, increasing the moving distance of the push plate 27 and facilitating debris removal.

[0029] Preferably, a second piston disc 39 is slidably disposed inside the first sleeve 7, a third sleeve rod 40 is disposed on the second water supply pipe 19, a first spring 42 is disposed at the top inner part of the first sleeve 7 and is connected to the second piston disc 39, one end of the third sleeve rod 40 is open and passes through the second piston disc 39, a fourth sleeve rod 41 is slidably disposed inside the third sleeve rod 40, and a second spring 43 is disposed at the bottom inner part of the first sleeve 7 and one end of the second spring 43 is connected to the fourth sleeve rod 41.

[0030] Specifically, the first spring 42 and the second spring 43 can drive the third connecting rod 40 and the fourth connecting rod 41 to reset.

[0031] Preferably, a cutting box 30 is provided at one end of the interior of the storage box 2, and a crushing component is provided inside the cutting box 30; The crushing assembly includes two cutting shafts 28 that are rotatably disposed inside the cutting box 30, and a plurality of cutting blades 29 disposed on the outer wall of the cutting shafts 28; A drive motor 10 is installed on the top of the storage box 2. A pulley 12 is installed on the output end of the drive motor 10 and on one side of the outer wall of the storage box 2. The two pulleys 12 are connected to a synchronous belt 13. The pulley 12 rotatably arranged on one side of the outer wall of the storage box 2 is fixedly connected to one end of a cutting shaft 28. A protective box 11 is installed on the other side of the storage box 2. Two gears 37 are rotatably arranged inside the protective box 11. The two gears 37 mesh with each other. The two cutting shafts 28 are fixedly connected to the two gears 37 respectively.

[0032] Specifically, before the waste enters the storage box 2, it passes through the cutting box 30. The cutting shaft 28 and cutting blade 29 inside the cutting box 30 can cut the waste. The drive motor 10 can drive the pulley 12 to rotate. The synchronous belt 13 makes the two pulleys 12 rotate synchronously. The pulleys 12 drive the cutting shaft 28 to rotate. The gear 37 drives the two cutting shafts 28 to rotate relative to each other, thereby cutting and crushing the waste.

[0033] Workflow: The treatment tank 1 is buried underground. Wastewater is introduced into the treatment tank 1 through the sewage inlet pipe 3 and falls onto the inclined block 22 and the filter plate 24. After the filter plate 24 is flattened, it forms a storage tank with the arc-shaped baffle 23. The wastewater enters the storage tank and undergoes solid-liquid separation through the filter plate 24. The liquid waste is discharged downwards, while the solid waste remains on the filter plate 24 for subsequent degradation. The filter plate 24 can be moved by the set drive component, causing the filter plate 24 to tilt and move one end to the top of the arc-shaped baffle 23. At this time, the solid waste on the filter plate 24 can slide into the storage tank 2. Wastewater can be pumped into the first chamber 16 through the first water supply pipe 17, and then pumped into the second chamber 18 through the second water supply pipe 19. The solidified microbial packing material 20 in the second chamber 18 decomposes the particulate matter in the wastewater. The aeration pipe 5 can be installed to aerate the interior of the second chamber 18 to facilitate degradation. The settled wastewater can be transported out through the drain pipe 21. Before the waste enters the storage box 2, it passes through the cutting box 30. The cutting shaft 28 and cutting blade 29 inside the cutting box 30 can cut the waste. The drive motor 10 can drive the pulley 12 to rotate. The synchronous belt 13 makes the two pulleys 12 rotate synchronously. The pulleys 12 drive the cutting shaft 28 to rotate. The gear 37 drives the two cutting shafts 28 to rotate relative to each other, thereby cutting and crushing the waste.

[0034] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. An integrated domestic sewage treatment device, comprising a treatment tank (1), characterized in that: The treatment box (1) is provided with a sewage inlet pipe (3) at the top of one end. The treatment box (1) is provided with a first chamber (16) and a second chamber (18). A first water supply pipe (17) is provided on one side wall of the first chamber (16). A second water supply pipe (19) is provided on one side wall of the second chamber (18). A drain pipe (21) is provided at the other end of the treatment box (1). The drain pipe (21) is connected to the second chamber (18). The second chamber (18) is provided with solidified microbial packing material (20). An inclined block (22) is provided inside one end of the processing box (1), and an arc-shaped baffle (23) is provided at the top of one end of the processing box (1). A filter plate (24) is rotatably provided at the top of one end of the inclined block (22), and one end of the filter plate (24) is in contact with the arc-shaped baffle (23). The processing box (1) is equipped with a drive assembly, which is connected to the filter plate (24) and is used to drive the filter plate (24) to move. A storage box (2) is provided at one end of the processing box (1). The storage box (2) is connected to the interior of the processing box (1). A second extraction pipe (6) is provided on the top of the storage box (2). The top of the processing box (1) is provided with two first extraction pipes (4), one of which is connected to the first chamber (16).

2. The integrated domestic sewage treatment device according to claim 1, characterized in that: An aeration pipe (5) is provided at the top of the second chamber (18), and one end of the aeration pipe (5) extends out of the interior of the second chamber (18).

3. The integrated domestic sewage treatment device according to claim 1, characterized in that: The drive assembly includes a second sleeve (25) disposed inside the inclined block (22), a first piston disc (31) slidably disposed inside the second sleeve (25), a first sleeve rod (32) disposed on one side of the first piston disc (31), a second sleeve rod (33) disposed inside the first sleeve rod (32), an oil tank (14) disposed on one side of the processing box (1), an oil pump disposed inside the oil tank (14), and an oil delivery pipe (15) connected to the output end of the oil pump. The inclined block (22) is provided with a second oil pipe (34), one end of the oil delivery pipe (15) is connected to the second oil pipe (34), the second oil pipe (34) is connected to the bottom of the second sleeve (25), and a second solenoid valve (35) is provided on the second oil pipe (34). The processing box (1) is equipped with a material pushing component, which is connected to the driving component.

4. The integrated domestic sewage treatment device according to claim 3, characterized in that: The bottom of the first connecting rod (32) is open and extends through the first piston disc (31).

5. The integrated domestic sewage treatment device according to claim 3, characterized in that: A cleaning channel (26) is formed between the inner wall of one end of the processing box (1), the inclined block (22), and the arc-shaped baffle (23). The feeding assembly includes a first sleeve (7) disposed on the top of the processing box (1), a third sleeve (40) slidably disposed inside the first sleeve (7), and a fourth sleeve (41) disposed at one end of the third sleeve (40). One end of the fourth sleeve (41) extends into the interior of the cleaning channel (26) and is connected to a push plate (27). One end of the oil pipeline (15) is connected to the first oil pipeline (8), one end of the first oil pipeline (8) passes through the processing box (1) and is connected to the top of the first sleeve (7), and the other end of the first oil pipeline (8) is provided with a third solenoid valve (36), and the first oil pipeline (8) is provided with a first solenoid valve (9).

6. The integrated domestic sewage treatment device according to claim 5, characterized in that: The first sleeve (7) has a second piston disc (39) slidably disposed inside, the third sleeve rod (40) is disposed on the second water supply pipe (19), and the first sleeve (7) has a first spring (42) disposed at the top inside, and the first spring (42) is connected to the second piston disc (39); One end of the third connecting rod (40) is open and passes through the second piston disc (39), and the fourth connecting rod (41) is slidably disposed inside the third connecting rod (40).

7. The integrated domestic sewage treatment device according to claim 6, characterized in that: The inner bottom of the first sleeve (7) is provided with a second spring (43), and one end of the second spring (43) is connected to the fourth sleeve rod (41).

8. The integrated domestic sewage treatment device according to claim 1, characterized in that: The bottom of the arc-shaped baffle (23) is provided with a stop block (38).

9. The integrated domestic sewage treatment device according to claim 1, characterized in that: The storage box (2) has a cutting box (30) at one end, and the cutting box (30) has a crushing component inside.

10. The integrated domestic sewage treatment device according to claim 9, characterized in that: The crushing assembly includes two cutting shafts (28) that are rotatably disposed inside the cutting box (30) and a plurality of cutting blades (29) disposed on the outer wall of the cutting shafts (28). The top of the storage box (2) is provided with a drive motor (10), and pulleys (12) are provided on the output end of the drive motor (10) and on one side of the outer wall of the storage box (2). The two pulleys (12) are connected together with a synchronous belt (13). The pulleys (12) rotatably arranged on one side of the outer wall of the storage box (2) are fixedly connected to one end of one of the cutting shafts (28). On the other side of the storage box (2), there is a protective box (11). Inside the protective box (11), there are two gears (37) that rotate relative to each other. The two gears (37) mesh with each other, and the two cutting shafts (28) are fixedly connected to the two gears (37) respectively.

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