Automatic sediment cleaning device for drainage system

Abstract

The utility model discloses an automatic sediment cleaning device for a drainage system, comprising a sand pumping device and a sediment settling box; the sand pumping device is connected to the bottom of the sediment settling box, and a discharge port is provided at one end of the sand pumping device away from the sediment settling box, so as to solve the problems of heavy workload, low cleaning efficiency and huge manpower and material resources required for sediment cleaning in the prior art.

Description

Technical Field

[0001] The utility model relates to an automatic sediment cleaning device for a drainage system, belonging to the technical field of sediment cleaning. Background Art

[0002] Drainage is an unavoidable problem in underground mining and ground engineering construction. However, the main problem in the drainage system is that silt deposition blocks the drainage ditch or drainage pipe, resulting in poor drainage, and silt accumulation burns out water pumps. At present, the main method to solve silt accumulation is to set up a sedimentation tank in the drainage system, or directly let the silt settle in the bottom water tank, the lowest point in the drainage system, etc., and then regularly use manual or mechanical cleaning of the sedimentation tank, bottom water tank, etc., which requires huge manpower and material resources and requires frequent cleaning, especially in underground mines. Not only does it significantly affect the construction of the main project, but untimely cleaning may also cause a poor on-site working environment and cause safety hazards.

[0003] The following are commonly used technologies for treating sediment deposition in the prior art:

[0004] Category 1: Cleaning device for sedimentation tank wall or water tank wall, representative patent: 2018101052798, used to clean the silt in the water tank or sedimentation tank to increase the water storage capacity, but cannot fundamentally solve the problem of siltation.

[0005] The second category: devices for directly cleaning sludge in sedimentation tanks, with the representative patent being 2016103980299. This device sets a box for depositing sludge in the sedimentation tank, and then uses an auxiliary device above the sedimentation tank to take out the box full of sludge in the sedimentation tank and transport it away by other means, and then put the box back into the sedimentation tank to continue depositing sludge. The disadvantage is that this device does not fundamentally solve the problem of sludge deposition. Although it can reduce the workload of cleaning sludge to a certain extent, the problem of transferring sludge is still not solved.

[0006] The third category: underground sediment cleaning devices for water wells, with the representative patent being 2016101159368, which use a spiral drum inside the box to transport sediment into the box, and then lift the box out of the water well to pour out the sediment. This device is only suitable for cleaning a small amount of sediment in a water well, and is not suitable for cleaning a large amount of sediment in underground mines and ground engineering drainage systems.

[0007] The fourth category: using a cleaning machine to clean up the large amount of silt deposited in the water tank. Compared with manual cleaning, although the use of a cleaning machine can significantly improve the efficiency of cleaning, the use of a cleaning machine still cannot solve the problem of large amounts of silt deposited in the drainage system. Moreover, water tanks with larger capacity are generally located at the bottom of the well, which are often inconvenient to transport. Even if a cleaning machine is used for cleaning, it will cost huge manpower and material resources.

[0008] In summary, the existing technology has the problems of large workload of sediment cleaning, low cleaning efficiency and huge manpower and material resources. Summary of the invention

[0009] The technical problem to be solved by the utility model is to provide an automatic mud and sand cleaning device for a drainage system to overcome the deficiencies of the prior art.

[0010] The technical solution of the utility model is: a drainage system sediment automatic cleaning device, comprising a sand pumping device and a sediment sedimentation box;

[0011] The sand pumping device is connected to the bottom of the sediment settling box, and a discharge port is provided at one end of the sand pumping device away from the sediment settling box.

[0012] Furthermore, it also includes a material guide trough, which is arranged below the discharge port.

[0013] Furthermore, the sediment settling box is funnel-shaped, and the sand pumping device is connected to the bottom outlet of the sediment settling box.

[0014] Furthermore, it also includes a grille, which is arranged at the upper opening of the sediment sedimentation box.

[0015] Preferably, the sand pumping device comprises a power unit and a spiral feed pipe;

[0016] The lower end of the spiral feeding pipe is connected to the bottom of the sediment settling box, and the upper end of the auger shaft inside the spiral feeding pipe is connected to the power unit through a coupling.

[0017] Optionally, the power unit includes an electric motor and a reducer, and the electric motor transmits power to the spiral feeding pipe through the reducer.

[0018] Furthermore, it also includes an electromagnetic starter and a time-controlled switch;

[0019] The output port of the electromagnetic starter is electrically connected to the motor;

[0020] The time-controlled switch is electrically connected to a control port of the electromagnetic starter.

[0021] Optionally, the power unit includes a pneumatic motor and a reducer, and the pneumatic motor transmits power to the spiral feed pipe through the reducer.

[0022] Furthermore, it also includes a solenoid valve and a time-controlled switch;

[0023] One end of the solenoid valve is communicated with the pneumatic motor, and a control port of the solenoid valve is electrically connected to the time-controlled switch.

[0024] Furthermore, it also includes two first length adjustable legs, the upper ends of the two first length adjustable legs are hinged to the lower surface of the middle part of the sand pumping device, the central axis of the rotating shaft of the first length adjustable legs and the sand pumping device is perpendicular to the length direction of the sand pumping device, and the angle between the two first length adjustable legs is greater than 0 degrees and less than 90 degrees.

[0025] Furthermore, it also includes a second length-adjustable leg, the upper end of which is hinged to the material guide chute.

[0026] Furthermore, it also includes a pin hole plate, which is fixedly connected to the sand pumping device, and the material guide trough is connected to the pin hole plate through a pin.

[0027] Further, it also includes a flushing pipeline, a flushing nozzle and a control valve;

[0028] One end of the flushing pipeline is connected to the drainage pipe of the drainage pump. A flushing nozzle is provided on the lower side wall of the flushing pipeline at the end of the flushing pipeline away from the drainage pipe. The flushing nozzle is connected to the flushing pipeline. A control valve is provided on the flushing pipeline between the flushing nozzle and the drainage pipe.

[0029] The beneficial effects of the utility model are: compared with the prior art,

[0030] The utility model installs a sediment settling box at a location with a large amount of sediment in the gravity ditch and next to a conveyor at the end of the gravity ditch close to a drainage pump, uses the sediment settling box to intercept the sediment in the drainage system, and then uses a sand pumping device to transport the sediment intercepted by the sediment settling box to the outside of the gravity ditch, thereby realizing automatic interception and transportation of sediment in the drainage system and significantly reducing the workload of cleaning sediment in the drainage system.

[0031] The efficiency of the utility model in cleaning silt depends on the interception effect of the silt sedimentation box. As long as the amount of silt in the silt sedimentation box is kept small, the silt will be intercepted in the silt sedimentation box under the action of gravity when passing through the silt sedimentation box, thereby obtaining a better interception effect. Ensuring that the amount of silt in the silt sedimentation box is kept small can be achieved by improving the conveying efficiency of the sand pumping device. Improving the conveying efficiency of the sand pumping device is easily achieved in the prior art by increasing the power, etc. Therefore, the utility model has a better silt interception effect.

[0032] The components of the utility model mainly include a sand pumping device and a silt sedimentation box. Compared with a bin cleaning machine, the structure is simpler, the transportation is more convenient, and the cleaning cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the main structure of Example 1 of the utility model;

[0034] Figure 2 It is a left-side structural schematic diagram of Example 1 of the utility model;

[0035] Figure 3 It is a schematic diagram of the top view of the structure of Example 1 of the utility model;

[0036] Figure 4 This is a schematic diagram of the main structure of Example 2 of the utility model;

[0037] Figure 5 It is a left-side structural schematic diagram of Example 2 of the present utility model;

[0038] Figure 6 It is a schematic diagram of the top view of the structure of Example 2 of the utility model;

[0039] Figure 7 This is a schematic diagram of the structure of the flushing nozzle of Example 1 of the utility model.

[0040] In the figure: 2 sediment deposition box, 3 spiral feed pipe, 4 height-adjustable legs, 5 discharge port, 6 reducer, 7 motor, 8 electromagnetic starter, 11 time switch, 12 coupling, 14 guide trough, 16 bolt pin, 18 pin hole plate, 20 height-adjustable legs, 21 grille, 22 pneumatic motor, 24 electromagnetic valve, 25 water tank or water nest, 26 flushing nozzle, 27 flushing pipeline, 29 drainage pump, 30 control valve, 32 drainage pipe. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in further detail below with reference to the accompanying drawings of this specification.

[0042] Embodiment 1: As attached Figure 1 and Figure 3 As shown, the automatic sediment cleaning device for the drainage system includes a sand pumping device and a sediment settling box 2; the sand pumping device is connected to the bottom of the sediment settling box 2, and the sand pumping device is provided with a discharge port 5 at one end away from the sediment settling box 2. In order to facilitate the diversion of the sediment pumped out by the sand pumping device to the discharge position, the device also includes a guide trough 14, which is arranged below the discharge port 5. The guide trough 14 can be overlapped with a belt conveyor or a scraper conveyor or an open space beside the ditch.

[0043] In order to ensure that there are no dead corners in the sediment trapped in the sediment settling box 2, and to ensure that the sediment trapped in the sediment settling box 2 can fully fall to the inlet of the sand pumping device under the action of gravity, thereby ensuring that the sediment settling box 2 efficiently intercepts the sediment, in the present device, the sediment settling box 2 is preferably set to a funnel shape, and the sand pumping device is connected to the bottom outlet of the sediment settling box 2.

[0044] In order to block large pieces of silt or stones outside the silt sedimentation box 2, and avoid large pieces of silt or stones being blocked in the silt sedimentation box 2, resulting in reduced silt interception effect, or causing the sand pumping device to be stuck and damaged, the present embodiment also includes a grille 21, which is arranged at the upper opening of the silt sedimentation box 2. The grille 21 can ensure that the silt is intercepted outside the silt sedimentation box 2, and can also ensure that large pieces of silt or stones are blocked outside the silt sedimentation box 2.

[0045] In order to make the structure of the sand pumping device simpler and more reliable, in this embodiment, preferably, the sand pumping device includes a power unit and a spiral feed pipe 3; the lower end of the spiral feed pipe 3 is connected to the bottom of the sediment sedimentation box 2, and the auger shaft at the upper end of the spiral feed pipe 3 is connected to the power unit through a coupling 12.

[0046] Optionally, the power unit includes a motor 7 and a reducer 6, and the motor 7 transmits power to the spiral feed pipe 3 through the reducer 6. Further, it also includes an electromagnetic starter 8 and a time switch 11; the output port of the electromagnetic starter 8 is electrically connected to the motor 7; the time switch 11 is electrically connected to the control port of the electromagnetic starter 8, and the motor 7 is powered on through the electromagnetic starter. The time switch 11 is turned on for a set period of time at intervals of each set time period to control the electromagnetic starter to start the motor 7, so that the sediment in the sediment sedimentation box 2 can be cleaned regularly, and the upper end of the auger shaft of the spiral feed pipe 3 is connected to the reducer 6 through the coupling 12, and the reducer 6 plays a role in reducing the speed of the motor 7 and increasing the torque. The motor 7 can be a vertical motor 7 or a horizontal motor 7, and the reducer 6 can be a horizontal reducer 6 or a vertical reducer 6.

[0047] In order to facilitate installation and adjustment of the position of the sand pumping device, in this embodiment, two first length adjustable legs 4 are further included, the upper ends of the two first length adjustable legs 4 are hinged to the lower surface of the middle part of the sand pumping device, the central axis of the rotating shaft of the first length adjustable legs 4 and the sand pumping device is perpendicular to the length direction of the sand pumping device, and the angle between the two first length adjustable legs 4 is greater than 0 degrees and less than 90 degrees. Three supporting points are formed by the two first length adjustable legs 4 and the lower end of the spiral feeding pipe 3, so that the position of the sand pumping device can be fixed.

[0048] The installation and adjustment of the position of the sand pumping device can also be performed without using the legs. A hook can be set at the upper end of the sand pumping device, and then the upper end of the screw sand pumping device can be fixed to the tunnel roof, side wall or other facilities through the hook.

[0049] In order to facilitate installation and adjustment of the position of the material guide chute 14, the present embodiment further includes a second length adjustable leg 20, the upper end of which is hinged to the material guide chute 14. When in use, the height or inclination of the material guide chute 14 can be adjusted by adjusting the length of the second length adjustable leg 20.

[0050] In order to facilitate the installation of the material guide trough and adjust the inclination angle of the material guide trough, the present embodiment further comprises a pin hole plate 18, wherein the pin hole plate 18 is fixedly connected to the sand pumping device, and the material guide trough (14) is connected to the pin hole plate (18) via the latch (16), the pin hole and the hole on the pin hole plate (18).

[0051] It is worth mentioning that the lower end of the guide trough 14 does not need to use a support leg. A pull rod with adjustable length can be used to connect the upper edge of the guide trough 14 to the reducer 6 or the reducer 6 mounting seat, etc., as long as the inclination angle of the guide trough 14 can be adjusted and the guide trough 14 can be fixed.

[0052] Sediment with a size less than 60mm×60mm×60mm and easily deposited in water is classified as coarse sediment; sediment that is suspended or semi-suspended in water and takes a long time to deposit in still water is classified as fine sediment. Since fine sediment is not easily retained by the sediment sedimentation box 2, fine sediment is easy to accumulate when used for a long time, resulting in poor cleaning effect. In order to solve the problem of fine mud cleaning, the present embodiment further includes a flushing pipeline 27, a flushing nozzle 26 and a control valve 30; one end of the flushing pipeline 27 is connected to the drain pipe 32 of the drain pump 29, and a flushing nozzle 26 is provided on the lower side wall of the flushing pipeline 27 at one end of the flushing pipeline 27 away from the drain pipe 32, and the flushing nozzle 26 is connected to the flushing pipeline 27, and a control valve 30 is provided on the flushing pipeline 27 between the flushing nozzle 26 and the drain pipe 32.

[0053] When in use, the flushing nozzle 26 is placed on the part to be cleaned 25, such as the bottom of a water pit or a water tank. The water tank at the bottom of the well has been installed with a drainage pump. The drainage pump 29 will drain water regularly. When cleaning fine mud and sand, the drainage pump 29 will be started regularly to drain water. When the drainage pump 29 drains water, the drainage pipe will generate strong water pressure. The high-pressure water on the drainage pipe is sprayed to the bottom of the water pit or the water tank through the flushing nozzle 26 through the flushing pipeline 27, so that the fine mud and sand deposited in the water pit or the water tank is suspended in the water in the water pit or the water tank and discharged along with the sewage by the drainage pump 29. When there is little fine mud and sand deposited in the water pit or the water tank, the flushing control valve 30 can be closed to improve the drainage efficiency of the drainage pump 29.

[0054] Embodiment 2: As attached Figure 4 and Figure 6As shown, the automatic sediment cleaning device for the drainage system includes a sand pumping device and a sediment settling box 2; the sand pumping device is connected to the bottom of the sediment settling box 2, and the sand pumping device is provided with a discharge port 5 at one end away from the sediment settling box 2. In order to facilitate the diversion of the sediment pumped out by the sand pumping device to the discharge position, the device also includes a guide trough 14, which is arranged below the discharge port 5. The guide trough 14 can be overlapped with a belt conveyor or a scraper conveyor or an open space beside the ditch.

[0055] In order to ensure that there are no dead corners in the sediment trapped in the sediment settling box 2, and to ensure that the sediment trapped in the sediment settling box 2 can fully fall to the inlet of the sand pumping device under the action of gravity, thereby ensuring that the sediment settling box 2 efficiently intercepts the sediment, in the present device, the sediment settling box 2 is preferably set to a funnel shape, and the sand pumping device is connected to the bottom outlet of the sediment settling box 2.

[0056] In order to block large pieces of silt or stones outside the silt sedimentation box 2, and avoid large pieces of silt or stones being blocked in the silt sedimentation box 2, resulting in reduced silt interception effect, or causing the sand pumping device to be stuck and damaged, the present embodiment also includes a grille 21, which is arranged at the upper opening of the silt sedimentation box 2. The grille 21 can ensure that the silt is intercepted outside the silt sedimentation box 2, and can also ensure that large pieces of silt or stones are blocked outside the silt sedimentation box 2.

[0057] In order to make the structure of the sand pumping device simpler and more reliable, in this embodiment, preferably, the sand pumping device includes a power unit and a spiral feed pipe 3; the lower end of the spiral feed pipe 3 is connected to the bottom of the sediment sedimentation box 2, and the auger shaft at the upper end of the spiral feed pipe 3 is connected to the power unit through a coupling 12.

[0058] Optionally, the power unit includes a pneumatic motor 22 and a reducer 6, and the pneumatic motor 22 transmits power to the spiral feed pipe 3 through the reducer 6. Further, it also includes a solenoid valve 24 and a time switch 11; one end of the solenoid valve 24 is connected to the pneumatic motor 22, and the control port of the solenoid valve 24 is electrically connected to the time switch 11, and the pneumatic motor 22 is connected to the air source through the solenoid valve 24. The time switch 11 opens a set period of time at intervals of each set time period to open the solenoid valve 24 to start the pneumatic motor 22, so that the sediment in the sediment sedimentation box 2 can be cleaned regularly, and the upper end of the auger shaft of the spiral feed pipe 3 is connected to the reducer 6 through the coupling 12, and the reducer 6 plays a role in reducing the speed of the motor 7 and increasing the torque. The pneumatic motor 22 can be a vertical pneumatic motor 22 or a horizontal pneumatic motor 22, and the reducer 6 can be a horizontal reducer 6 or a vertical reducer 6.

[0059] In order to facilitate installation and adjustment of the position of the sand pumping device, in this embodiment, two first length adjustable legs 4 are further included, the upper ends of the two first length adjustable legs 4 are hinged to the lower surface of the middle part of the sand pumping device, the central axis of the rotating shaft of the first length adjustable legs 4 and the sand pumping device is perpendicular to the length direction of the sand pumping device, and the angle between the two first length adjustable legs 4 is greater than 0 degrees and less than 180 degrees. Three supporting points are formed by the two first length adjustable legs 4 and the lower end of the spiral feeding pipe 3, so that the position of the sand pumping device can be fixed.

[0060] The installation and adjustment of the position of the sand pumping device can also be performed without using the legs. A hook can be set at the upper end of the sand pumping device, and then the upper end of the screw sand pumping device can be fixed to the tunnel roof, side wall or other facilities through the hook.

[0061] In order to facilitate installation and adjustment of the position of the material guide chute 14, the present embodiment further includes a second length adjustable leg 20, the upper end of which is hinged to the material guide chute 14. When in use, the height or inclination of the material guide chute 14 can be adjusted by adjusting the length of the second length adjustable leg 20.

[0062] In order to facilitate the installation of the material guide trough and adjust the inclination angle of the material guide trough, the present embodiment further comprises a pin hole plate 18, wherein the pin hole plate 18 is fixedly connected to the sand pumping device, and the material guide trough (14) is connected to the pin hole plate (18) via a latch (16).

[0063] It is worth mentioning that the lower end of the guide trough 14 does not need to use a support leg. A pull rod with adjustable length can be used to connect the upper edge of the guide trough 14 to the reducer 6 or the reducer 6 mounting seat, etc., as long as the inclination angle of the guide trough 14 can be adjusted and the guide trough 14 can be fixed.

[0064] Sediment with a size less than 60mm×60mm×60mm and easily deposited in water is classified as coarse sediment; sediment that is suspended or semi-suspended in water and takes a long time to deposit in still water is classified as fine sediment. Since fine sediment is not easily retained by the sediment sedimentation box 2, fine sediment is easy to accumulate when used for a long time, resulting in poor cleaning effect. In order to solve the problem of fine mud cleaning, the present embodiment further includes a flushing pipeline 27, a flushing nozzle 26 and a control valve 30; one end of the flushing pipeline 27 is connected to the drain pipe 32 of the drain pump 29, and a flushing nozzle 26 is provided on the lower side wall of the flushing pipeline 27 at one end of the flushing pipeline 27 away from the drain pipe 32, and the flushing nozzle 26 is connected to the flushing pipeline 27, and a control valve 30 is provided on the flushing pipeline 27 between the flushing nozzle 26 and the drain pipe 32.

[0065] When in use, the flushing nozzle 26 is placed on the part to be cleaned 25, such as the bottom of a water pit or a water tank. The water tank at the bottom of the well has been installed with a drainage pump. The drainage pump 29 will drain water regularly. When cleaning fine mud and sand, the drainage pump 29 will be started regularly to drain water. When the drainage pump 29 drains water, the drainage pipe will generate strong water pressure. The high-pressure water on the drainage pipe is sprayed to the bottom of the water pit or the water tank through the flushing nozzle 26 through the flushing pipeline 27, so that the fine mud and sand deposited in the water pit or the water tank is suspended in the water in the water pit or the water tank and discharged along with the sewage by the drainage pump 29. When there is little fine mud and sand deposited in the water pit or the water tank, the flushing control valve 30 can be closed to improve the drainage efficiency of the drainage pump 29.

[0066] Working principle: When the utility model is used, the sedimentation box 2 is installed at a position with a large amount of sediment in the gravity ditch, next to the conveyor at the end of the gravity ditch close to the drainage pump, and the sedimentation box 2 is used to intercept the sediment in the drainage system, and then the sediment intercepted by the sedimentation box 2 is transported to the outside of the gravity ditch by the sand pumping device, so as to realize automatic interception and transportation of sediment in the drainage system, and significantly reduce the workload of cleaning the sediment in the drainage system; the sediment cleaning efficiency of the utility model depends on the interception effect of the sedimentation box 2, as long as the amount of sediment in the sedimentation box 2 is kept small, the sediment is intercepted in the sedimentation box 2 under the action of gravity when passing through the sedimentation box 2, so as to obtain a better interception effect, and ensuring that the amount of sediment in the sedimentation box 2 is kept small can be achieved by improving the conveying efficiency of the sand pumping device, and improving the conveying efficiency of the sand pumping device is easy to achieve in the prior art by increasing power, etc., so the utility model has a better sediment interception effect.

[0067] The parts not described in detail in the present utility model are all known technologies to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model and are not limiting. Although the present utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present utility model, which should be included in the scope of the claims of the present utility model.

Claims

1. Automatic sediment cleaning device for drainage system, characterized in that: It includes a sand pumping device and a sand settling box (2); The sand pumping device is connected to the bottom of the sediment settling box (2), and a discharge port (5) is provided at one end of the sand pumping device away from the sediment settling box (2); The sediment settling box (2) is funnel-shaped, and the sand pumping device is connected to the bottom outlet of the sediment settling box (2).

2. The automatic sediment cleaning device for drainage system according to claim 1, characterized in that: It also comprises a material guide trough (14), wherein the material guide trough (14) is arranged below the material discharge port (5).

3. The automatic sediment cleaning device for drainage system according to claim 1, characterized in that: It also comprises a grille (21), wherein the grille (21) is arranged at the upper opening of the sediment settling box (2).

4. The automatic sediment cleaning device for drainage system according to any one of claims 1 to 3, characterized in that: The sand pumping device comprises a power unit and a spiral feed pipe (3); The lower end of the spiral feed pipe (3) is connected to the bottom of the sediment settling box (2), and the upper end of the auger shaft inside the spiral feed pipe (3) is connected to the power unit via a coupling (12).

5. The automatic sediment cleaning device for drainage system according to claim 4, characterized in that: The power unit comprises an electric motor (7) and a reducer (6), and the electric motor (7) transmits power to the auger inside the spiral feed pipe (3) through the reducer (6).

6. The automatic sediment cleaning device for drainage system according to claim 5, characterized in that: It also includes an electromagnetic starter (8) and a time-controlled switch (11); The output port of the electromagnetic starter (8) is electrically connected to the motor (7); The time-controlled switch (11) is electrically connected to a control port of the electromagnetic starter (8).

7. The automatic sediment cleaning device for drainage system according to claim 4, characterized in that: The power unit comprises a pneumatic motor (22) and a reducer (6), and the pneumatic motor (22) transmits power to the auger inside the spiral feed pipe (3) through the reducer (6).

8. The automatic sediment cleaning device for drainage system according to claim 7, characterized in that: It also includes a solenoid valve (24) and a time-controlled switch (11); One end of the solenoid valve (24) is in communication with the pneumatic motor (22), and a control port of the solenoid valve (24) is electrically connected to the time-controlled switch (11).

9. The automatic sediment cleaning device for drainage system according to any one of claims 1 to 3, characterized in that: It also comprises two first length adjustable legs (4), the upper ends of the two first length adjustable legs (4) being hinged to the lower surface of the middle part of the sand pumping device, the central axis of the rotating shaft of the first length adjustable legs (4) being hinged to the sand pumping device is perpendicular to the length direction of the sand pumping device, and the angle between the two first length adjustable legs (4) is greater than 0 degrees and less than 90 degrees.

10. The automatic sediment cleaning device for drainage system according to any one of claims 1 to 3, characterized in that: It also comprises a second length-adjustable leg (20), the upper end of the second length-adjustable leg (20) being hinged to the material guide chute (14).

11. The automatic sediment cleaning device for drainage system according to claim 10, characterized in that: It also comprises a pin hole plate (18), wherein the pin hole plate (18) is fixedly connected to the sand pumping device, and the material guide trough (14) is connected to the pin hole plate (18) via a latch (16).

12. The automatic sediment cleaning device for drainage system according to claim 1, characterized in that: It also includes a flushing pipeline (27), a flushing nozzle (26) and a control valve (30); One end of the flushing pipeline (27) is connected to a drainage pipe (32) of a drainage pump (29); a flushing nozzle (26) is provided on a lower side wall of the flushing pipeline (27) at an end of the flushing pipeline (27) away from the drainage pipe (32); the flushing nozzle (26) is connected to the flushing pipeline (27); and a control valve (30) is provided on the flushing pipeline (27) between the flushing nozzle (26) and the drainage pipe (32).

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