A sewer drainage device

Abstract

The invention discloses a sewer sewage discharge device, comprising a mobile working box, a cover opening mechanism is arranged on the mobile working box, a mud drainage component and a sewage outlet are arranged on the side wall of the mobile working box, a water tank, a mud screening component, a water pump and a mud flushing component are arranged inside the mobile working box; the mud screening component comprises a screen mechanism installed above the water tank, the screen mechanism is used to receive the mud transmitted by the mud drainage component, a screen cleaning pipe group is arranged at the mud inlet end of the screen mechanism, a scraper assembly is arranged at the mud outlet end of the screen mechanism, and the scraper assembly is arranged at one side of the sewage outlet; and the screen cleaning pipe group is connected to the water outlet end of the water pump through a first drainage pipe; the water outlet end of the water pump is connected to the mud flushing component through a second drainage pipe, the water inlet end of the water pump is connected to the water tank through a first water inlet pipe, and the water inlet end of the water pump is connected to the water supply end through a second water inlet pipe. The device of the invention has high sewage discharge efficiency and saves time and labor.

Description

Technical Field

[0001] The invention relates to the technical field of sewer cleaning devices, and in particular to a sewer sewage discharge device. Background Art

[0002] There are long strips of sewers on school playgrounds, beside gardens, and beside roads. However, a large amount of mud and sand that falls from the road surface with rainwater accumulates in the sewers all year round. If these mud and sand are not dealt with in time, they will clog the sewers and affect the city's normal drainage system.

[0003] However, the existing method of treating mud in sewers has the following defects:

[0004] The current solution is to ask people to remove cement or iron sewer covers piece by piece, and then use a shovel to shovel out stones, garbage, and mud from the sewer little by little, and then treat them uniformly. Such treatment work will consume a lot of time, manpower and material resources; due to the sedimentation of mud and sand in the sewer, some mud mixed with sand exists in the sewer in a consolidated manner. The use of water flushing not only wastes water resources, but also has little controllability and low cleaning efficiency. Summary of the invention

[0005] To this end, the present invention provides a sewer sewage discharge device to solve the above-mentioned defects in the prior art.

[0006] A sewer sewage discharge device comprises a mobile working box, the mobile working box is provided with a cover opening mechanism, the side wall of the mobile working box is provided with a mud drainage component and a sewage discharge port, and the interior of the mobile working box is provided with a water tank, a mud screening component, a water pump and a mud flushing component;

[0007] The mud screening assembly includes a screen mechanism installed above the water tank, the screen mechanism is used to receive the mud transmitted by the mud drainage assembly, the mud inlet end of the screen mechanism is provided with a screen cleaning pipe group, the mud outlet end of the screen mechanism is provided with a scraper assembly, and the scraper assembly is arranged on one side of the sewage outlet; and the screen cleaning pipe group is connected to the water outlet end of the water pump through a first drainage pipe; the water outlet end of the water pump is connected to the mud flushing assembly through a second drainage pipe, the water inlet end of the water pump is connected to the water tank through a first water inlet pipe, and the water inlet end of the water pump is connected to the water supply end through a second water inlet pipe.

[0008] Preferably, the cover opening mechanism includes a horizontal fine-tuning device installed on the mobile working box, the horizontal fine-tuning device is provided with a laterally rotating rotating cylinder, the rotating cylinder is provided with a mobile cylinder that moves perpendicular to the moving direction of the horizontal fine-tuning device, the mobile cylinder is provided with a lifting cylinder, the end of the lifting cylinder is connected to a clamping cylinder; the horizontal fine-tuning device includes a horizontal limit guide rail fixedly installed on the mobile working box, a horizontal moving plate is slidably installed on the horizontal limit guide rail, the rotating cylinder is installed on the horizontal moving plate, a screw nut sleeve is installed on the horizontal moving plate, a screw nut is installed inside the screw nut sleeve, a screw that cooperates with the screw nut is provided parallel to the moving direction of the horizontal moving plate, and the rotating shaft of the screw is connected to the first motor through a coupling.

[0009] Preferably, the mud drainage assembly includes a lifting drainage trough and a slurry guide trough connected to the drainage end of the lifting drainage trough, the slurry guide trough extends to the top of the screen mechanism, the interior of the lifting drainage trough is provided with a crawler conveyor belt driven by a pulley mechanism, the crawler conveyor belt is equidistantly provided with guardrails perpendicular to the surface of the crawler conveyor belt, and one end of the lifting drainage trough is hinged to the mobile working box, and the other end is connected to a lifting assembly.

[0010] Preferably, the lifting assembly includes an electric push rod for limiting one end of the crawler conveyor belt and a pull rope for lifting one end of the crawler conveyor belt, and the other end of the pull rope is connected to a second motor. Preferably, the screen mechanism includes a screen bracket installed above the water tank, and several layers of filter screens are installed above and below the screen bracket. The screen holes of the filter screen located on the upper layer are larger than the screen holes of the filter screen located on the lower layer. The filter screen includes a slope section located at the starting end and a curved surface section located at the end, and the slope section and the curved surface section are connected by a plane section. The screen cleaning pipe group is installed on the slope section, and the scraper assembly is installed on the curved surface section.

[0011] Preferably, the scraper assembly includes scraper shafts respectively arranged above the curved surface sections of each layer of screen support, and a plurality of scrapers are installed on the scraper shafts through a spring ring array. The scrapers act on the curved surface of the curved surface section during rotation, and gears are arranged at the ends of the plurality of scraper shafts, and two adjacent gears are meshed with each other. A transmission gear meshed with the gear is arranged on one side of one of the gears, and the transmission gear is driven to rotate by a third motor.

[0012] Preferably, the mud flushing assembly includes an inner pipe shaft rotatably mounted on the end of the second drain pipe, an outer pipe shaft is fixedly mounted on the inner pipe shaft, the inner pipe shaft and the outer pipe shaft are connected to each other, a drainage hose is wrapped around the outer pipe shaft, and both ends of the inner pipe shaft are rotatably mounted on pipe shaft brackets, and the pipe shaft brackets are fixedly mounted on the mobile working box.

[0013] Preferably, a driving gear driven to rotate by a fourth motor is installed at one end of the outer tube shaft, and a gear ring meshing with the driving gear is arranged around the end wall of the outer tube shaft.

[0014] The present invention has the following advantages:

[0015] (1) The present invention uses a mobile working box equipped with a cover opening mechanism with a multi-directional adjustable distance to easily remove the cover of the sewer, which saves time and effort compared to manual removal of the cover;

[0016] (2) The present invention utilizes the mud flushing component to disperse the silt in the sewer, and then transports it to the mud screening component for layered filtration through the drainage of the mud drainage component, and cooperates with the water flow of the screen cleaning pipe group to flush the surface of the filter screen to avoid clogging of the screen. The final impurities are scraped out by the scraper component. The entire device runs smoothly and has strong controllability, which improves the efficiency of sewer sewage discharge. In addition, the filtered sewage can be recycled for flushing the sewer by the mud flushing component, thereby improving resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the lifting drainage trough of the present invention when it is folded;

[0019] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the back structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the local structure of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the mud screening assembly of the present invention;

[0023] Figure 7 It is a partial structural schematic diagram of the scraper assembly of the present invention;

[0024] Figure 8 It is a structural schematic diagram of the scraper assembly of the present invention;

[0025] Fig. 9For the present invention Figure 8 A is a schematic diagram of the enlarged structure of the middle part;

[0026] Fig.10 It is a structural schematic diagram of the working state of the horizontal fine-tuning device of the present invention;

[0027] Fig.11 It is a structural schematic diagram of the horizontal fine-adjusting device of the present invention in a non-working state;

[0028] Fig.12 It is a schematic diagram of the internal partial structure of the present invention;

[0029] Fig.13 It is a structural schematic diagram of the horizontal fine-tuning device of the present invention;

[0030] Fig.14 It is a detailed structural schematic diagram of the mud flushing assembly of the present invention;

[0031] Fig.15 It is a schematic structural diagram of the filter screen of the mud flushing assembly of the present invention;

[0032] Fig.16 It is a schematic structural diagram of the gate of the present invention.

[0033] In the figure:

[0034] 1-mobile working box; 2-opening mechanism; 3-mud drainage assembly; 4-water tank; 5-mud screening assembly; 6-water pump; 7-mud flushing assembly; 8-first drainage pipe; 9-second drainage pipe; 10-first water inlet pipe; 11-second water inlet pipe; 12-drainage outlet; 13-gate;

[0035] 201-horizontal fine-tuning device; 202-rotating cylinder; 203-moving cylinder; 204-lifting cylinder; 205-gripping cylinder; 206-horizontal limit guide rail; 207-horizontal moving plate; 208-screw nut sleeve; 209-screw nut; 210-screw; 211-coupling; 212-first motor;

[0036] 301-lifting drainage trough; 302-slurry guide trough; 303-pulley mechanism; 304-crawler conveyor belt; 305-rail board; 306-electric push rod; 307-pull rope; 308-second motor; 309-winding wheel; 310-guide member;

[0037] 501-screen mechanism; 502-screen cleaning pipe group; 503-scraper assembly; 504-screen bracket; 505-filter screen; 506-slope section; 507-curved section; 508-plane section; 509-scraper shaft; 510-spring; 511-scraper; 512-gear; 513-transmission gear; 514-third motor;

[0038] 701-inner pipe shaft; 702-outer pipe shaft; 703-drainage hose; 704-pipe shaft bracket; 705-fourth motor; 706-driving gear; 707-gear ring. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0040] like Figures 1 to 16 As shown, the present invention provides a sewer drainage device, which can easily open the sewer cover and perform efficient sewage drainage operations on the sewer. Specifically:

[0041] The sewage discharge device includes a mobile working box 1, on which a cover opening mechanism 2 is provided, a side wall of the mobile working box 1 is provided with a mud drainage component 3 and a sewage discharge port 12, and the interior of the mobile working box 1 is provided with a water tank 4, a mud screening component 5, a water pump 6 and a mud flushing component 7.

[0042] Among them, the mud screening assembly 5 includes a screen mechanism 501 installed above the water tank 4, the screen mechanism 501 is used to receive the mud transmitted by the mud drainage assembly 3, the mud inlet end of the screen mechanism 501 is provided with a screen cleaning pipe group 502, the mud outlet end of the screen mechanism 501 is provided with a scraper assembly 503, and the scraper assembly 503 is arranged on one side of the sewage outlet 12; and the screen cleaning pipe group 502 is connected to the water outlet end of the water pump 6 through the first drainage pipe 8; the water outlet end of the water pump 6 is connected to the mud flushing assembly 7 through the second drainage pipe 9, the water inlet end of the water pump 6 is connected to the water tank 4 through the first water inlet pipe 10, and the water inlet end of the water pump 6 is connected to the water supply end through the second water inlet pipe 11.

[0043] The bottom of the mobile working box 1 is provided with universal wheels so that it can be moved.

[0044] The cover opening mechanism 2 is used to open the cover of the sewer.

[0045] The cover opening mechanism 2 includes a horizontal fine-tuning device 201 installed on the mobile working box 1, the horizontal fine-tuning device 201 is provided with a rotating cylinder 202 that rotates laterally, the rotating cylinder 202 is provided with a moving cylinder 203 that moves perpendicular to the moving direction of the horizontal fine-tuning device 201, the moving cylinder 203 is provided with a lifting cylinder 204, and the end of the lifting cylinder 204 is connected to a clamping claw cylinder 205; the horizontal fine-tuning device 201 includes a horizontal fine-tuning device 201 fixedly installed on the mobile working box 1 A limit guide rail 206, a horizontal moving plate 207 is slidably installed on the horizontal limit guide rail 206, the rotary cylinder 202 is installed on the horizontal moving plate 207, a screw nut sleeve 208 is installed on the horizontal moving plate 207, a screw nut 209 is installed inside the screw nut sleeve 208, a screw 210 that cooperates with the screw nut 209 is arranged parallel to the moving direction of the horizontal moving plate 207, and the rotating shaft of the screw 210 is connected to the first motor 212 through a coupling 211.

[0046] When the cover opening mechanism 2 is working, first start the moving cylinder 203 to make the clamping cylinder 205 at the front end of the moving cylinder 203 reach the horizontal direction of the sewer cover, start the rotating cylinder 202 to rotate the lifting cylinder 204 to the vertical direction, and then adjust the horizontal fine-tuning device 201 to make the lifting cylinder 204 move horizontally until the clamping cylinder 205 is directly above the cover, and use the lifting cylinder 204 to drive the clamping cylinder 205 to descend and clamp the cover, and move the cover to one side of the sewer.

[0047] What needs to be introduced here is the adjustment method of the horizontal fine-tuning device 201: the first motor 212 drives the screw 210 to rotate, and the horizontal moving plate 207 where the screw nut 209 cooperating with the screw 210 is located will move horizontally under the horizontal limiting action of the horizontal limiting guide rail 206.

[0048] The mud drainage assembly 3 is used to drain mud in the sewer. Specifically:

[0049] The mud drainage assembly 3 includes a lifting drainage trough 301 and a slurry guide trough 302 connected to the drainage end of the lifting drainage trough 301, the slurry guide trough 302 extends to the top of the screen mechanism 501, and the lifting drainage trough 301 is provided with a crawler conveyor belt 304 driven by a pulley mechanism 303, and the crawler conveyor belt 304 is equidistantly provided with baffles 305 perpendicular to the surface of the crawler conveyor belt 304, and one end of the lifting drainage trough 301 is hinged to the mobile working box 1, and the other end is connected to a lifting assembly; the lifting assembly includes an electric push rod 306 for limiting one end of the crawler conveyor belt 304 and a pull rope 307 for lifting one end of the crawler conveyor belt 304, the other end of the pull rope 307 is connected to a winding wheel 309 driven to rotate by a second motor 308, and the mobile working box 1 is also provided with a guide member 310 for guiding the pull rope 307. The guide member 310 can adjust the turning direction of the pull rope 307 .

[0050] The lifting and lowering method of the lifting and lowering drainage trough 301 is: when the push rod of the electric push rod 306 is in the retracted state, the second motor 308 is started, and the rotating second motor 308 causes the pull rope 307 wound on the winding wheel 309 to lower one end of the lifting and lowering drainage trough 301, and then the push rod of the electric push rod 306 is pushed out to fix the lower end of the lifting and lowering drainage trough 301 to prevent the lifting and lowering drainage trough 301 from shaking during the operation. More preferably, another electric push rod 306 (not shown in the figure) can be set on the mobile working box 1 to fix the lifting and lowering drainage trough 301 after lifting.

[0051] The screen mechanism 501 includes a screen bracket 504 installed above the water tank 4, and several layers of filter screens 505 are installed above and below the screen bracket 504. The screen holes of the filter screen 505 located in the upper layer are larger than the screen holes of the filter screen 505 located in the lower layer. The filter screen 505 includes a slope section 506 located at the starting end and a curved surface section 507 located at the end. The slope section 506 and the curved surface section 507 are connected by a plane section 508. The screen cleaning pipe group 502 is installed on the slope section 506, and the scraper assembly 503 is installed on the curved surface section 507.

[0052] The arrangement of the slope section 506 , the plane section 508 and the curved section 507 of the filter screen 505 is conducive to flushing the sludge by the water flow sprayed from the screen cleaning pipe group 502 .

[0053] The screen support 504 of the embodiment of the present invention has three layers in total. The upper layer with the largest mesh is used to filter out bottles, plastic bags, and large stones; the middle layer is used to filter out small stones; and the lower layer with the smallest mesh is used to filter out silt, so that the silt filtering is more thorough.

[0054] The scraper assembly 503 is used to scrape off impurities that fall onto the curved surface section 507 of the filter screen 505. Specifically:

[0055] The scraper assembly 503 includes scraper shafts 509 respectively arranged above the curved surface sections 507 of each layer of screen supports 504, and a plurality of scrapers 511 are installed on the scraper shafts 509 in a ring array through springs 510. The scrapers 511 act on the curved surface of the curved surface section 507 during rotation. Gears 512 are arranged at the ends of the plurality of scraper shafts 509, and two adjacent gears 512 are meshed with each other. A transmission gear 513 meshed with the transmission gear is arranged on one side of one of the gears 512, and the transmission gear 513 is driven to rotate by a third motor 514.

[0056] When the third motor 514 is started, the third motor 514 drives the transmission gear 513 to drive the several scraper shafts 509 where the gears 512 meshing therewith are located to rotate synchronously, and the scrapers 511 connected to the scraper shafts 509 scrape the silt on the curved surface section 507 of the screen bracket 504 to the sewage outlet 12.

[0057] The mud flushing assembly 7 is used to flush the mud in the sewer. Specifically:

[0058] The mud flushing assembly 7 includes an inner tube shaft 701 rotatably mounted on the end of the second drainage pipe 9, an outer tube shaft 702 is fixedly mounted on the inner tube shaft 701, the inner tube shaft 701 and the outer tube shaft 702 are connected to each other, a drainage hose 703 is wound around the outer tube shaft 702, and both ends of the inner tube shaft 701 are rotatably mounted on tube shaft brackets 704, and the tube shaft brackets 704 are fixedly mounted on the mobile working box.

[0059] A driving gear 706 driven to rotate by a fourth motor 705 is installed at one end of the outer tube shaft 702 , and a gear ring 707 meshing with the driving gear 706 is arranged around the end wall of the outer tube shaft 702 .

[0060] The water in the water pump 6 enters the inner tube shaft 701 through the second drainage pipe 9, and then flows out of the drainage hose 703 through the outer tube shaft 702. When the fourth motor 705 is started, the rotating driving gear 706 will rotate the outer tube shaft 702 where the gear ring 707 is located, and the drainage hose 703 wound on the outer tube shaft 702 can be pulled out; when the fourth motor 705 is reversed, the drainage hose 703 can be quickly rolled up.

[0061] The drainage hose 703 is finally pulled out from the gate 13 installed on the mobile working box 1 .

[0062] The working principle of the device of the present invention is as follows:

[0063] The mobile working box 1 moves to both ends of the sewer successively, and the sewer cover plates at both ends are opened by using the cover opening mechanism 2, and the lifting assembly is started from one end of the sewer outlet, so that one end of the lifting drainage trough 301 is lowered to the bottom surface of the sewer; the drainage hose 703 of the mud flushing assembly 7 is dragged to the other end of the sewer outlet, and water is sprayed toward one side of the lifting drainage trough 301. The water in the water tank 4 and the water supply end is pressurized by the water pump 6 to form high-pressure water, which flushes the sludge and debris in the sewer into mud, avoids the mud from solidifying into blocks, and is conducive to the transportation of mud in the later stage;

[0064] Afterwards, the crawler conveyor belt 304 in the lifting drainage trough 301 starts working, and the slurry is intercepted by the guardrail 305 and transported to the slurry guide trough 302. The mud in the slurry guide trough 302 falls onto the surface of the filter screen 505 of the mud screening assembly 5 for layered filtration, so that the stones and debris in the mud are separated from the water, and the stones and debris pass through the slope section 506 of the filter screen 505 and fall to the plane section 508. Since the screen cleaning pipe group 502 sprays water onto the filter screen 505, the filter screen 505 is avoided from being blocked; after that, the scraper assembly 503 is started, and the scraper shaft 509 of the scraper assembly 503 rotates to drive the scraper 511 to scrape the silt and debris on the inner side of the curved section 507 to be discharged to the sewage outlet 12.

[0065] The sieved water flows down into the water tank 4 and is reused. The water source of the present invention can come from two places. One place flows into the water pump 6 from the water supply end through the second water inlet pipe 11. The water supply end here can be the city water network or other external water source. The other place is the water falling into the water tank 4 and flows into the water pump 6 through the first water inlet pipe 10. The water from the two places can be used for flushing the filter screen 505 by the screen cleaning pipe group 502 through the first drain pipe 8, and can also be used for the mud flushing component 7 to disperse the sediment in the sewer through the second drain pipe 9.

[0066] In a word, the device of the present invention has high sewage discharge efficiency, saves time and effort, and greatly liberates labor.

[0067] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A sewer sewage discharge device, characterized in that: The mobile working box (1) comprises a mobile working box (1), wherein a cover opening mechanism (2) is arranged on the mobile working box (1), a mud drainage assembly (3) and a sewage outlet (12) are arranged on the side wall of the mobile working box (1), and a water tank (4), a mud screening assembly (5), a water pump (6) and a mud flushing assembly (7) are arranged inside the mobile working box (1); The mud screening assembly (5) comprises a screen mechanism (501) installed above the water tank (4), the screen mechanism (501) is used to receive the mud transmitted by the mud drainage assembly (3), the mud inlet end of the screen mechanism (501) is provided with a screen cleaning pipe group (502), the mud outlet end of the screen mechanism (501) is provided with a scraper assembly (503), and the scraper assembly (503) is arranged on one side of the sewage outlet (12); and the screen cleaning pipe group (502) is connected to the water outlet end of the water pump (6) through a first drainage pipe (8); the water outlet end of the water pump (6) is connected to the mud flushing assembly (7) through a second drainage pipe (9), the water inlet end of the water pump (6) is connected to the water tank (4) through a first water inlet pipe (10), and the water inlet end of the water pump (6) is connected to the water supply end through a second water inlet pipe (11); The cover opening mechanism (2) comprises a horizontal fine-adjustment device (201) mounted on the mobile working box (1); the horizontal fine-adjustment device (201) is provided with a rotary cylinder (202) that rotates laterally; the rotary cylinder (202) is provided with a movable cylinder (203) that moves perpendicular to the moving direction of the horizontal fine-adjustment device (201); the movable cylinder (203) is provided with a lifting cylinder (204); the end of the lifting cylinder (204) is connected to a clamping claw cylinder (205); the horizontal fine-adjustment device (201) comprises a horizontal limiter (201) fixedly mounted on the mobile working box (1); A horizontal limit guide rail (206) is provided, a horizontal moving plate (207) is slidably mounted on the horizontal limit guide rail (206), the rotary cylinder (202) is mounted on the horizontal moving plate (207), a lead screw nut sleeve (208) is mounted on the horizontal moving plate (207), a lead screw nut (209) is sleeved inside the lead screw nut sleeve (208), a lead screw (210) is provided parallel to the moving direction of the horizontal moving plate (207) and cooperates with the lead screw nut (209), and a rotating shaft of the lead screw (210) is connected to a first motor (212) via a coupling (211); The mud drainage assembly (3) comprises a lifting drainage trough (301) and a slurry guide trough (302) connected to the drainage end of the lifting drainage trough (301), the slurry guide trough (302) extending to the top of the screen mechanism (501), the lifting drainage trough (301) is provided with a crawler conveyor belt (304) driven by a pulley mechanism (303), the crawler conveyor belt (304) is equidistantly provided with fences (305) perpendicular to the surface of the crawler conveyor belt (304), and one end of the lifting drainage trough (301) is hinged to the mobile working box (1), and the other end is connected to a lifting assembly.

2. A sewer drainage device according to claim 1, characterized in that: The lifting assembly includes an electric push rod (306) for limiting one end of the crawler conveyor belt (304) and a pull rope (307) for lifting one end of the crawler conveyor belt (304); the other end of the pull rope (307) is connected to a winding wheel (309) driven to rotate by a second motor (308); and the mobile working box (1) is also provided with a guide member (310) for guiding the pull rope (307); the guide member (310) can adjust the turning direction of the pull rope (307).

3. A sewer drainage device according to claim 1, characterized in that: The screen mechanism (501) comprises a screen support (504) installed above the water tank (4); a plurality of layers of filter screens (505) are installed above and below the screen support (504); the mesh openings of the filter screen (505) located at the upper layer are larger than the mesh openings of the filter screen (505) located at the lower layer; the filter screen (505) comprises a slope section (506) located at the starting end and a curved surface section (507) located at the end; the slope section (506) and the curved surface section (507) are connected via a plane section (508); the screen cleaning pipe assembly (502) is installed on the slope section (506); and the scraper assembly (503) is installed on the curved surface section (507).

4. A sewer drainage device according to claim 3, characterized in that: The scraper assembly (503) includes scraper shafts (509) respectively arranged above the curved surface sections (507) of each layer of the screen support (504), and a plurality of scrapers (511) are installed on the scraper shaft (509) in a ring array through springs (510). The scrapers (511) act on the curved surface of the curved surface section (507) during rotation. Gears (512) are arranged at the ends of the plurality of scraper shafts (509), and two adjacent gears (512) are meshed with each other. A transmission gear (513) meshed with the transmission gear (513) is arranged on one side of one of the gears (512), and the transmission gear (513) is driven to rotate by a third motor (514).

5. A sewer drainage device according to claim 1, characterized in that: The mud flushing assembly (7) comprises an inner pipe shaft (701) rotatably mounted on the end of the second drainage pipe (9); an outer pipe shaft (702) is fixedly mounted on the inner pipe shaft (701); the inner pipe shaft (701) and the outer pipe shaft (702) are connected to each other; a drainage hose (703) is wound around the outer pipe shaft (702); and pipe shaft brackets (704) are rotatably mounted at both ends of the inner pipe shaft (701); and the pipe shaft brackets (704) are fixedly mounted on the mobile working box (1).

6. A sewer drainage device according to claim 5, characterized in that: A driving gear (706) driven to rotate by a fourth motor (705) is installed at one end of the outer tube shaft (702), and a gear ring (707) meshing with the driving gear (706) is arranged around the end wall of the outer tube shaft (702).

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