Sludge suction and scraping device and sedimentation tank system

Abstract

The utility model discloses a mud sucking and scraping device and a sedimentation tank system, the mud sucking and scraping device comprises a walking frame walking above a sedimentation tank, a mud discharge pipe arranged on the walking frame, a submersible pump used for forming siphon to suck mud and a mud scraping device, the mud scraping device comprises a movable arm, a connecting frame and a mud scraping plate, the movable arm is connected with the connecting frame to form an included angle, one side of the connecting frame is rotatably arranged on the sludge discharge pipe, the other side of the connecting frame is connected with the sludge scraping plate, and the connecting frame rotates around the sludge discharge pipe through the movable arm, so that the sludge scraping plate is lifted away from or tightly attached to the bottom of the sedimentation tank. The mud scraping plate is connected through an integrated frame structure, the movable arm and the connecting frame are connected and form an included angle, the connecting frame is driven to rotate by driving the movable arm during operation, then the mud scraping plate can be tightly attached to the ground of the sedimentation tank to clean accumulated mud, and meanwhile the mud scraping plate is lifted away from the ground through rotation after cleaning work is completed. And the walking frame is prevented from being blocked during return.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, especially relate to a kind of suction mud scraping device and sedimentation tank system. BACKGROUND

[0002] Sedimentation tank is the construction that carries out sedimentation and is used to remove suspended solids in water, and is one of the facilities commonly used in sewage treatment plant and waterworks. According to the sedimentation mode, there are mainly the following two kinds: the first kind is horizontal flow sedimentation tank: composed of inlet, outlet, water flow part and sludge hopper, with simple structure, good sedimentation effect, but large floor area, low flow rate; the second kind is inclined tube sedimentation tank: on the basis of horizontal flow sedimentation tank, honeycomb inclined tube is installed, which can greatly improve the sedimentation efficiency, shorten the sedimentation time, improve the flow rate, and effectively reduce the volume of sedimentation tank, but the maintenance workload of inclined tube is large, therefore, the suspended solids in the sedimentation tank need to be cleaned by sludge removal vehicle after sedimentation at the bottom of the tank.

[0003] In the prior art, siphon type sludge removal vehicle is used to clean the sludge in inclined tube sedimentation tank, a plurality of fixed diamond-shaped scraper plates are arranged in the underwater part of the sludge removal vehicle, and the deposited material at the bottom of the tank is stacked between the diamond-shaped scraper plates during the operation of the vehicle to form a suction port, and the sludge is discharged outside the tank through the suction port by siphon. Since the diamond-shaped scraper plate is fixedly designed, it needs to be installed at a height of 3-5 cm from the bottom of the tank to prevent scratching the bottom, and there is a gap between the diamond-shaped scraper plates for setting the suction port, which causes the deposited material at the bottom of the sedimentation tank to be not completely cleaned during the operation of the vehicle. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of suction mud scraping device and sedimentation tank system, to solve the problem that sludge removal vehicle for inclined tube sedimentation tank cannot clean the deposited material at the bottom of the sedimentation tank in the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a kind of suction mud scraping device for cleaning the deposited material in the sedimentation tank, comprising:

[0006] walking frame, walking above the sedimentation tank;

[0007] sludge discharge pipe, arranged on the walking frame, with a suction port at one end close to the bottom of the sedimentation tank;

[0008] submersible pump, connected with the sludge discharge pipe, for forming siphon to suck sludge;And

[0009] The mud scraping device is arranged on the mud discharge pipe, and comprises a movable arm, a connecting frame and a mud scraping plate.

[0010] Optionally, a driving mechanism and a lifting rod are arranged, one end of the lifting rod is connected with the driving mechanism, the other end is connected with the movable arm, and the driving mechanism drives the lifting rod to drive the movable arm to rotate the connecting frame around the mud discharge pipe.

[0011] Optionally, the walking frame comprises a truss, a vehicle body and a power device, the truss is arranged on the vehicle body, the power device is electrically connected with the vehicle body to drive the vehicle body to walk on the sedimentation tank, and the mud discharge pipe and the driving mechanism are arranged on the truss.

[0012] Optionally, an electric control center is arranged on the truss, the electric control center comprises a vehicle state sensor arranged on the vehicle body and used for detecting the vehicle state of the vehicle body, and the electric control center controls the driving mechanism according to a signal of the vehicle state sensor.

[0013] And / or, the electric control center comprises a mud concentration sensor arranged on the truss and used for detecting the mud concentration in the sedimentation tank, and the electric control center controls the power device according to a signal of the mud concentration sensor.

[0014] Optionally, the mud scraping device comprises a supporting frame arranged on the mud discharge pipe, a bearing seat is arranged on the supporting frame, one side of the connecting frame is a circular pipe, the other side is a square pipe, the circular pipe of the connecting frame is rotatably arranged in the bearing seat, and one side of the square pipe of the connecting frame is connected with the mud scraping plate.

[0015] Optionally, the angle between the movable arm and the connecting frame is 70°-110°.

[0016] Optionally, the mud scraping plate is a PDMS flexible plate.

[0017] The utility model also provides a sedimentation tank system which comprises a sedimentation tank and the mud sucking and scraping device, the mud sucking and scraping device is arranged on the sedimentation tank, and the end of the mud discharge pipe of the mud sucking and scraping device is communicated with the outside and is provided with a valve.

[0018] The utility model discloses a technical scheme, walking frame walks above the sedimentation tank, and the mud pipe is established in walking frame, and the mud pipe is equipped with the suction mud mouth in the end close to the bottom of sedimentation tank, and the silt is sucked through the siphon of submersible pump, and the silt device includes movable arm, connecting frame and silt plate, and movable arm is connected with connecting frame and forms the included angle, and one side of connecting frame is rotatably arranged in the mud pipe, and the other side is connected with silt plate. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the purpose of the present application more clear, the following will introduce the drawings used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structure shown in the drawings without creative labor.

[0020] Figure 1 It is the structural schematic diagram of the suction silt device in an embodiment of the utility model;

[0021] Figure 2 It is the structural schematic diagram of the suction silt device in an embodiment of the utility model;

[0022] Figure 3 It is the structural schematic diagram of the sedimentation tank system in an embodiment of the utility model;

[0023] Figure 4a It is the initial state schematic diagram of the suction silt device in an embodiment of the utility model;

[0024] Figure 4b It is the silt state schematic diagram of the suction silt device in an embodiment of the utility model;

[0025] Figure 4c It is the silt state schematic diagram of the suction silt device in an embodiment of the utility model;

[0026] Figure 4d It is the end state schematic diagram of the suction silt device in an embodiment of the utility model.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] Name Reference Name Reference Suction and scraping device 100 Square tube 1322 Walking frame 110 Scraping plate 133 Truss 111 Support frame 134 Vehicle body 112 Bearing seat 135 Mud discharge pipe 120 Driving mechanism 140 Mud suction port 121 Lifting rod 150 Scraping device 130 Electric control center 160 Movable arm 131 Sedimentation tank 200 Connecting frame 132 Valve 300 Round tube 1321

[0029] The purposes, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0031] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings). If the specific posture changes, the directionality indications also change accordingly.

[0032] The main purpose of the utility model is to provide a kind of suction mud scraping device 100, to solve the problem that the mud removal vehicle for inclined tube sedimentation tank in prior art cannot clean the mud accumulated at the bottom of sedimentation tank.

[0033] Referring to Figure 1 As shown in FIG. 4, in an embodiment of the utility model, a suction mud scraping device 100 includes a walking frame 110 that walks above a sedimentation tank 200, a mud discharge pipe 120 provided on the walking frame 110, the mud discharge pipe 120 being provided with a mud suction port 121 at one end close to the bottom of the sedimentation tank 200, a submersible pump connected with the mud discharge pipe 120 for forming siphon to suck mud, and a mud scraping device 130 provided on the mud discharge pipe 120, the mud scraping device 130 including a movable arm 131, a connecting frame 132 and a mud scraping plate 133, the movable arm 131 being connected with the connecting frame 132 and forming an included angle, one side of the connecting frame 132 being rotatably provided on the mud discharge pipe 120 and the other side being connected with the mud scraping plate 133, the connecting frame 132 being rotated around the mud discharge pipe 120 by the movable arm 131 to lift or tightly adhere the mud scraping plate 133 to the bottom of the sedimentation tank 200.

[0034] The utility model discloses a technical scheme, walking frame 110 walks above the sedimentation tank 200, and the sludge discharge pipe 120 is arranged on the walking frame 110, and the sludge discharge pipe 120 is provided with a suction port at one end close to the bottom of the sedimentation tank 200, and mud suction is carried out through siphon generated by the submersible pump, and the mud scraping device 130 includes a movable arm 131, a connecting frame 132 and a mud scraping plate 133, the movable arm 131 is connected with the connecting frame 132 and forms an included angle, and one side of the connecting frame 132 is rotatably arranged on the sludge discharge pipe 120, and the other side is connected with the mud scraping plate 133. In this way, the movable arm 131 and the connecting frame 132 constitute a connecting rod structure, when it is necessary to clean the sludge in the sedimentation tank 200, the connecting frame 132 is only driven to rotate to the mud scraping plate 133 to tightly adhere to the ground of the sedimentation tank 200 by driving the movable arm 131, and the walking frame 110 walks above the sedimentation tank 200 to drive the mud scraping plate 133 to pile mud, and then the mud is sucked away through the suction port 121, and after the work is completed, the connecting frame 132 is driven to rotate to the mud scraping plate 133 to lift off the ground by driving the movable arm 131, so that the walking frame 110 is not hindered when returning; in addition, the mud scraping plate 133 and the sludge discharge pipe 120 are independently arranged, so that the mud scraping plate 133 does not need to be arranged with a gap to avoid the suction port 121, and the integral and coherent mud scraping plate 133 makes the sludge cleaning effect of the sedimentation tank 200 better.

[0035] It should be noted that the travelling frame is arranged across the whole sedimentation tank 200 and can walk above the sedimentation tank 200 along the length direction of the sedimentation tank 200; the sludge discharge pipe 120 is installed on the travelling frame in a mode of welding or bolt connection, and a part of the sludge discharge pipe 120 extends into the sedimentation tank 200, the sludge discharge pipe 120 is arranged in a U shape, and multiple suction ports 121 are arranged at intervals on the side of the sludge discharge pipe 120 close to the ground of the sedimentation tank 200 to cover the width direction of the sedimentation tank 200; the mud scraping device 130 includes the movable arm 131, the connecting frame 132 and the mud scraping plate 133, one side of the connecting frame 132 is rotatably installed on the end face of the sludge discharge pipe 120 close to the bottom of the tank, and the other side is connected with the movable arm 131, the mud scraping plate 133 is lifted off or tightly adheres to the ground of the sedimentation tank 200 through the rotation of the connecting frame 132, and the sludge on the bottom of the tank is cleaned; in addition, it can be seen from the figure that the connecting frame 132 is separated from the suction port 121, so that the mud scraping plate 133 does not need to be arranged with a gap to avoid the suction port 121, and the whole mud scraping plate 133 is arranged across the sedimentation tank 200 and will not appear a gap to cause incomplete cleaning.

[0036] Referring to Figure 1As shown in FIG. 4, in an embodiment of the present application, the mud scraping device 100 further comprises a driving mechanism 140 and a lifting rod 150, the driving mechanism 140 is arranged on the walking frame 110, one end of the lifting rod 150 is connected with the driving mechanism 140, the other end is connected with the movable arm 131, the driving mechanism 140 drives the lifting rod 150 to drive the movable arm 131, so that the connecting frame 132 rotates around the mud discharge pipe 120. It should be noted that the driving mechanism 140 of the present application adopts the form of a linear cylinder, which drives the lifting rod 150 and then drives the movable arm 131 through the linear piston movement of the cylinder, so that the connecting frame 132 rotates. Of course, it can also be in the form of a motor, gear rack, etc., as long as it can realize automatic control of the lifting rod 150. The embodiment of the present application is not limited thereto, and the above are all within the protection scope of the present application. Specifically, one end of the lifting rod 150 is connected with the piston end of the cylinder through a pin, and the other end of the lifting rod 150 is movably connected with the movable arm 131, so that the connecting rod, the movable arm 131 and the connecting frame 132 form a connecting rod structure. The structure has a simple movement mode and is easy to realize. Automatic control of mud scraping and cleaning can be realized through a cylinder, thereby effectively reducing production cost.

[0037] It should be noted that the mud scraping device 100 of the present application realizes sludge cleaning by the following steps during use: I. Referring to Figure 4a , the mud scraping device 100 is in an initial state, at this time the mud scraping plate 133 is far away from the ground of the sedimentation tank 200, when the cleaning is started, the driving device is started, the output end of the cylinder extends in the direction indicated by the arrow in the drawing, pushes the lifting rod 150, and then makes the combined structure of the movable arm 131 and the connecting rod rotate, so that the mud scraping plate 133 approaches the ground; II. Referring to Figure 4b , the mud scraping device 100 is in a mud scraping state, at this time the mud scraping plate 133 is in close contact with the ground, and then the traveling frame advances in the direction indicated by the arrow in the drawing to scrape mud, the mud scraping plate 133 continuously piles mud during the advancing process; III. Referring to Figure 4c , the mud scraping device 100 is in a mud suction state, when the mud scraping plate 133 piles up the sludge in the sedimentation tank 200 to a certain height, the traveling frame stops advancing, then the submersible pump (not shown in the drawing) is started to form a siphon, the sludge is sucked into the mud discharge pipe 120 through the mud suction port 121, and after the suction is completed, the submersible pump is closed, the traveling frame continues to advance, and the mud suction step is repeated until the traveling frame reaches the end point; IV. Referring to Figure 4d, the suction and scraping device 100 is in the ending state, after the trolley frame reaches the terminal point, the driving device is started again, the output end of the cylinder is retracted in the direction indicated by the arrow in the drawing, the lifting rod 150 is pulled up, the combined structure of the movable arm 131 and the connecting rod is rotated, the mud scraping plate 133 is lifted off the ground, and then the trolley frame returns to the starting point in the direction indicated by the arrow in the drawing, and the return is completed. It should be noted that the arrow indicating the direction of the trolley frame in the above-mentioned drawing is only an example of the embodiment, and in other embodiments, it can also be in other directions of travel, and the specific direction is determined according to the actual situation, and is not limited here.

[0038] Referring to Figure 1 As shown in FIG. 4, in an embodiment of the present application, the trolley frame 110 includes a truss 111, a vehicle body 112 and a power device, the truss 111 is arranged on the vehicle body 112, the power device is electrically connected with the vehicle body 112 to drive the vehicle body 112 to walk on the sedimentation tank 200, the mud discharge pipe 120 and the driving mechanism 140 are arranged on the truss 111. Specifically, the vehicle body 112 is a trolley with wheels, and there are two vehicle bodies 112 on both sides of the top of the sedimentation tank 200; the truss 111 is arranged on the two vehicle bodies 112 to span the sedimentation tank 200, the mud discharge pipe 120 and the driving mechanism 140 are arranged on the truss 111, the truss 111 is welded by carbon steel or stainless steel straight pipes, which saves materials while having high strength and rigidity; the top of the sedimentation tank 200 is provided with a track for limiting the movement of the vehicle body 112, and the power device is preferably a motor, each vehicle body 112 is provided with a motor (not shown in the drawing), the vehicle body 112 is driven to walk on the track by forward and reverse rotation of the motor, so as to drive the mud scraping plate 133 to scrape and clean the bottom surface of the entire sedimentation tank 200, and return after cleaning.

[0039] Referring to Figure 1As shown in FIG. 4, in an embodiment of the present application, the truss 111 is provided with an electric control center 160; the electric control center 160 comprises a driving state sensor, the driving state sensor is arranged on the vehicle body 112 and is used for detecting the driving state of the vehicle body 112, the electric control center 160 controls the driving mechanism 140 according to the signal of the driving state sensor, preferably, the electric control center 160 further comprises a sludge concentration sensor, the sludge concentration sensor is arranged on the truss 111 and is used for detecting the sludge concentration in the sedimentation tank 200, the electric control center 160 controls the power device according to the signal of the sludge concentration sensor. It should be noted that whether the driving state sensor and the sludge concentration sensor are installed can be selected according to requirements, and the above sensors can also be installed at the required position according to the actual requirements, so as to achieve better detection effect. Specifically, the electric control center 160 comprises a control electric box, which is arranged at the top of the truss 111 and is electrically connected with the submersible pump, the driving device and the power device, and is used for controlling the submersible pump to generate siphon, controlling the driving device to drive the movable arm 131 and controlling the power device to provide power for the vehicle body 112. The driving state sensor is arranged at the bottom of the vehicle body 112 (not shown in the figure), detects the driving condition of the vehicle body 112, and the electric control center 160 controls the driving device according to the signal returned by the driving state sensor: when the vehicle body 112 drives to the end point, the electric control center 160 controls the driving device to make the lifting rod 150 lift upward, and drives the mud scraping plate 133 to leave the ground of the sedimentation tank 200, when the vehicle body 112 returns to the starting point, the driving device is controlled to make the lifting rod 150 descend, and drives the mud scraping plate 133 to tightly adhere to the ground of the sedimentation tank 200. The sludge concentration sensor is arranged on the connecting frame 132 (not shown in the figure), when the sludge is scraped, the mud scraping plate 133 piles up the sludge at the bottom of the sedimentation tank 200 forward, when the sludge concentration sensor detects that the sludge pile reaches the preset detection value height, the electric control center 160 controls the power device to make the vehicle body 112 stop driving and open the submersible pump to suck the sludge, when the sludge height is lower than the detection value, the sludge sucking is stopped, and the vehicle body 112 continues to advance to pile the sludge. By arranging the electric control center 160 and the two sensors, the whole sludge scraping and cleaning process does not need manual intervention, and the cleaning efficiency is improved.

[0040] Referring to Figure 1As shown in FIG. 4, in an embodiment of the present application, the mud scraping device 130 comprises a supporting frame 134, the supporting frame 134 is arranged on the mud discharge pipe 120, the supporting frame 134 is provided with a bearing seat 135, one side of the connecting frame 132 is a round pipe 1321 and the other side is a square pipe 1322, the round pipe 1321 of the connecting frame 132 is rotatably arranged in the bearing seat 135, and the square pipe 1322 of the connecting frame 132 is connected with the mud scraping plate 133. Specifically, one side of the connecting frame 132 is a round pipe 1321 and the other side is a square pipe 1322, and the middle is connected with a plate rib; a plurality of supporting frames 134 are arranged on the end face of the mud discharge pipe 120 close to the pool bottom along the width direction of the sedimentation tank 200, the supporting frames 134 are welded on the mud discharge pipe 120 through reinforcing ribs, a plurality of bearing seats 135 are arranged on the side of the supporting frame 134 close to the pool bottom, the bearing seats 135 are fixed in a welding or bolt connection manner, and the round pipes 1321 pass through the plurality of bearing seats 135 in sequence, so that the whole connecting frame 132 rotates around the supporting frame 134 in the plurality of bearing seats 135 through the round pipes 1321. The rotation of the connecting frame 132 is assisted by the bearing seat 135, so that the movement of the whole device is smoother, and the phenomenon that the mud scraping plate 133 cannot normally work due to jamming or rotation out of position is avoided.

[0041] Referring to Figure 1 As shown in FIG. 4, in an embodiment of the present application, the included angle between the movable arm 131 and the connecting frame 132 is 70°-110°. It should be noted that the movable arm 131 is arranged on the round pipe 1321 of the connecting frame 132, and the included angle between the movable arm 131 and the connecting frame 132 is preferably 90°, forming an L-shaped connecting rod structure, and in addition, the included angle can be adjusted within the range of 90°±20°, and the embodiments of the present application are not limited thereto, and the above are within the protection scope of the present application. The simple connecting rod movement is realized by setting the structure of the included angle to control the mud scraping plate 133 to lift off or tightly adhere to the ground of the sedimentation tank 200, and the lifting rod 150 and the mud discharge pipe 120 can also be staggered to avoid interference during movement.

[0042] Referring to Figure 1 As shown in FIG. 4, in an embodiment of the present application, the mud scraping plate 133 is a PDMS flexible plate. It should be noted that the flexible plate of the mud scraping plate 133 in the embodiments of the present application is made of polydimethylsiloxane (PDMS) material, and other flexible materials resistant to wear and corrosion can also be used, such as polyurethane elastomer (TPU), polyurethane (PU), high molecular polyethylene (UPE) and the like. The flexible wear-resistant and corrosion-resistant flexible material is used to manufacture the mud scraping plate 133, so that the mud scraping plate 133 can maintain a certain elasticity and softness when tightly adhering to the ground, avoid scratching the ground, and also can delay the service life of the mud scraping plate 133 and avoid frequent replacement.

[0043] Referring to Figure 1As shown in FIG. 4, the utility model embodiment provides a kind of sedimentation tank 200 system, including sedimentation tank 200 and above-mentioned suction mud scraping device 100, suction mud scraping device 100 is located in sedimentation tank 200, and the end of mud discharge pipe 120 of suction mud scraping device 100 is communicated with outside and is provided with valve 300.It needs to be explained that the suction mud scraping device 100 of the utility model is mainly applied to in inclined tube sedimentation tank, since mud scraping plate 133 adopts frame structure, rotating end adopts hollow rigid shaft, is installed in the underwater portion of sedimentation tank 200 by bearing seat 135, avoid when being applied to in inclined tube sedimentation tank, appear since mud scraping plate 133 width is too large and lead to the situation that cannot guarantee torsional rigidity;In addition, it can also be applied to horizontal flow sedimentation tank, for realizing the sludge cleaning of various sedimentation tanks, the utility model embodiment is not limited to this, above are within the protection scope of the utility model.This specific, when needing to clean the sludge in sedimentation tank 200, car frame walks on sedimentation tank 200, and mud scraping plate 133 of mud scraping device 130 pushes mud by sticking to the ground of sedimentation tank 200, and submersible pump generates siphon and sucks mud by mud discharge pipe 120, and the end of mud discharge pipe 120 extends to the outside of sedimentation tank 200, and the sludge that is sucked into from suction port 121 is finally discharged outside by valve 300 being set in the end of mud discharge pipe 120;When finishing cleaning work, submersible pump stops siphon, and valve 300 is automatically closed simultaneously, and mud scraping plate 133 lifts off ground, and car frame returns starting point.The beneficial effects of sedimentation tank 200 system in the embodiment are equivalent to the above-mentioned suction mud scraping device 100, and will not be repeated here.

[0044] The above-mentioned is only optional embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent structure transformation using the utility model specification and attached drawing contents under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection range of the utility model.

Claims

1. A mud suction and scraping device for cleaning mud in a sedimentation tank, characterized in that: include: A walking frame, configured to travel above the sedimentation tank; A mud discharge pipe is provided on the traveling frame, and a mud suction port is provided at one end of the mud discharge pipe close to the bottom of the sedimentation tank; a submersible pump connected to the mud discharge pipe and used to form a siphon to suck mud; as well as A scraping device is provided on the mud discharge pipe. The scraping device includes a movable arm, a connecting frame and a scraping plate. The movable arm is connected to the connecting frame and forms an angle. One side of the connecting frame can be rotatably provided on the mud discharge pipe, and the other side is connected to the scraping plate. The connecting frame is rotated around the mud discharge pipe by the movable arm so that the scraping plate is lifted off or close to the bottom of the sedimentation tank.

2. The mud suction and scraping device according to claim 1, characterized in that: It includes a driving mechanism and a lifting rod. The driving mechanism is arranged on the walking frame. One end of the lifting rod is connected to the driving mechanism and the other end is connected to the movable arm. The driving mechanism drives the lifting rod to drive the movable arm so that the connecting frame rotates around the mud discharge pipe.

3. The mud suction and scraping device according to claim 2, characterized in that: The traveling frame includes a truss, a vehicle body and a power device. The truss is arranged on the vehicle body. The power device is electrically connected to the vehicle body to drive the vehicle body to travel on the sedimentation tank. The mud discharge pipe and the driving mechanism are arranged on the truss.

4. The mud suction and scraping device according to claim 3, characterized in that: An electric control center is provided on the truss; the electric control center includes a driving state sensor, which is provided on the vehicle body and is used to detect the driving state of the vehicle body. The electric control center controls the driving mechanism according to the signal from the driving state sensor; And / or, the electronic control center includes a sludge concentration sensor, which is arranged on the truss and is used to detect the sludge concentration in the sedimentation tank, and the electronic control center controls the power device according to the signal of the sludge concentration sensor.

5. The mud suction and scraping device according to any one of claims 1 to 4, characterized in that: The scraper device includes a support frame, which is arranged on the mud discharge pipe. A bearing seat is provided on the support frame. One side of the connecting frame is a round tube and the other side is a square tube. The round tube of the connecting frame can be rotatably arranged in the bearing seat, and one side of the square tube of the connecting frame is connected to the scraper.

6. The mud suction and scraping device according to any one of claims 1 to 4, characterized in that: The included angle between the movable arm and the connecting frame is 70° to 110°.

7. The mud suction and scraping device according to any one of claims 1 to 4, characterized in that: The scraper is a PDMS flexible plate.

8. A sedimentation tank system, characterized in that: include: A sedimentation tank and a mud suction and scraping device according to any one of claims 1 to 7, wherein the mud suction and scraping device is arranged in the sedimentation tank, and the end of the mud discharge pipe of the mud suction and scraping device is connected to the outside and is provided with a valve.

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