Sludge and sewage separation device for desilting

Abstract

The utility model discloses a sludge and sewage separating device for desilting, and relates to the technical field of water conservancy. The device comprises a device shell, for the device shell, a motor is fixedly installed in the device shell, a driving gear is fixedly installed at the output end of the motor, a connecting gear is installed outside the driving gear in a meshed mode, a rack is installed outside the connecting gear in a meshed mode, and the rack and the driving gear are located on the same horizontal plane. A power rod is fixedly installed on the back face of the rack, the connecting gear is rotationally connected in a concave part of a sliding block, the sliding block is slidably connected in the device shell, a spring is fixedly installed on the back face of the sliding block, and the other end of the spring is fixedly installed in the device shell. By using a connecting gear, a sliding block and a spring, the overload phenomenon of the motor is avoided, and the service life of the device is prolonged; through the use of a stop block II and a stop block III, sewage which is not filtered is prevented from flowing out, and the use efficiency of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of water conservancy technology, and specifically relates to a sludge-sewage separation device for dredging. Background Technology

[0002] Water conservancy projects are a general term for various engineering constructions undertaken to control, utilize, and protect surface and underground water resources and the environment. Rivers and reservoirs in various regions are indispensable and important components of water conservancy projects. However, in actual use, the siltation of rivers and reservoirs seriously affects their normal function, so it is necessary to dredge rivers and reservoirs regularly.

[0003] Chinese patent CN202122768239.1 discloses a dredging device for water conservancy projects. This utility model relates to the field of water conservancy engineering, specifically a dredging device for water conservancy projects. It includes a housing, a suction pipe connected to one side of the housing, a filter plate installed inside the housing, a drain pipe installed on the other side of the housing, and a pressing component inside the housing. The suction pipe draws sludge up and transports it to the inside of the housing. The sludge falls onto the filter plate through a trough, initially filtering the water in the sludge to the area below the filter plate. Turning on the motor drives a guide rod, which in turn drives a gear to rotate. The gear meshes with a toothed plate, causing the toothed plate to descend, which in turn drives a drive rod to descend, thereby driving a pressure plate to move downwards and compress the sludge. This compression helps to quickly remove water from the sludge, reducing the transport weight of the sludge and facilitating transportation.

[0004] In practical use, when the sludge under the pressure plate has completely drained its water, the amount of sludge after squeezing out water cannot be controlled because the sludge and water content cannot be determined each time the sludge is processed. Consequently, the downward movement of the pressure plate driven by the motor cannot be controlled. When the sludge has a low water content, the motor continues to drive the pressure plate downward after the water has been drained, which can cause the motor to overload and affect the service life of the device. Furthermore, in the above solution, the filter plate needs to have a certain thickness and must be able to seal the space above the water tank to achieve the filtration effect. However, the above solution clearly has the problem that the filter plate needs to be tilted when the sludge is discharged. When the filter plate is tilted, there will be a gap between the filter plate and the inner wall when the filter plate is placed horizontally (which will cause some sludge to fall into the water tank during sewage filtration). If there is no gap between the filter plate and the inner wall, the filter plate cannot be tilted when discharging sludge, and the above device cannot discharge sludge. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a sludge-sewage separation device for dredging, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a sludge and sewage separation device for dredging, comprising a device housing, a motor fixedly installed inside the device housing, a drive gear fixedly installed at the output end of the motor, a connecting gear meshing with the drive gear, a rack meshing with the connecting gear, the rack and the drive gear being located on the same horizontal plane, a power rod fixedly installed on the back of the rack, the connecting gear being rotatably connected to the recess of a slider, the slider being slidably connected inside the device housing, a spring fixedly installed on the back of the slider, and the other end of the spring being fixedly installed inside the device housing.

[0008] Furthermore, regarding the power rod, a pressure plate is fixedly connected to the lower end of the power rod, a water inlet groove is opened on the upper part of the pressure plate, a drive rod groove is opened on the pressure plate, and the outside of the pressure plate completely fills the inside of the device housing.

[0009] Furthermore, regarding the power rod, a circular groove is provided at the lower end of the power rod, and a movable shaft is movably installed inside the circular groove. A sealing plate is fixedly installed at the lower end of the movable shaft, and the diameter of the sealing plate is larger than that of the water inlet groove.

[0010] Furthermore, regarding the device housing, a rotatable rotating rod is installed inside the device housing, and a filter plate is fixedly installed outside the rotating rod. The filter plate has small filter holes, and the filter plate is slightly smaller than the internal area of ​​the device housing.

[0011] Furthermore, regarding the filter plate, a sliding block is fixedly installed on the filter plate. A sliding groove is formed inside the sliding block, and a drive rod is slidably installed inside the sliding groove. The drive rod passes through the drive rod groove, and a stop block is fixedly installed at each of the upper and lower ends of the drive rod.

[0012] Furthermore, regarding the device housing, two staggered stop blocks are fixedly installed inside the device housing, and two stop blocks are fixedly installed inside the device housing, which can limit the position of the filter plate.

[0013] Furthermore, regarding the third block, a mud outlet is provided in the middle of the third block and the second block. A through groove is provided on the inner wall of the mud outlet, and a mud baffle is provided inside the mud outlet. The mud baffle can slide through the through groove.

[0014] Furthermore, regarding the device housing, a water outlet is provided at the lower end of the device housing, and a water inlet is provided at the upper end of the device housing.

[0015] This utility model has the following beneficial effects:

[0016] At the start of dredging, wastewater can be injected into the device housing through the inlet. When wastewater is injected, the baffle plate blocks the sludge outlet. Before sludge filtration begins, the pressure plate is located at the top of the device housing, and unfiltered wastewater enters the housing through the inlet trough. When the lower end of the power rod is at the top of the device housing, the movable shaft inside the circular groove will fall under gravity. However, due to the special structure of the circular groove and the movable shaft, the shaft will not slide out of the groove. The sealing plate, under the influence of the wastewater entering from the inlet trough, will further cause the movable shaft to fall. When the wastewater inside the device housing... When the water reaches the fixed valve point, the power rod moves downward, which in turn moves the pressure plate downward. Under the buoyancy of the sewage, the upper surface of the sealing plate presses tightly against the lower surface of the pressure plate, blocking the water inlet. The sealing plate is made of hard rubber. When sludge removal is required, the motor is started. The motor output rotates counterclockwise, driving the drive gear fixedly installed at the output to rotate counterclockwise. The counterclockwise rotation of the drive gear drives the connecting gear to rotate clockwise. The clockwise rotation of the connecting gear drives the rack to move downward, which in turn moves the power rod downward. Under normal circumstances, when the lower end of the power rod is blocked by sludge and cannot move further downward (i.e., the rack cannot move downward), the connecting gear will not rotate, and similarly, the drive gear will not rotate. At this time, the motor is still running but cannot rotate, thus causing the motor to fall into an overload state, which will shorten the motor's service life.However, when the power rod cannot move downwards and the connecting gear cannot rotate, the drive gear still tends to rotate counterclockwise. This tendency causes the connecting gear to move away from the drive gear and rack. However, because the connecting gear is located inside the recess of the slider and because the slider is slidably connected to the inside of the device housing, the connecting gear, under the counterclockwise rotation tendency of the drive gear, drives the slider away from the drive gear and rack and simultaneously compresses the spring. In this way, the drive gear can rotate normally, preventing the motor from falling into an overload state. When the pressure plate and sealing plate move downwards, they will squeeze the sewage towards the filter plate, and the tiny filter holes on the filter plate will filter out the sludge in the sewage squeezed towards the filter plate. The two stops and the filter plate can prevent unfiltered sewage from entering below the filter plate. During the downward movement of the pressure plate, the lower end face of the pressure plate pushes the lower end of the drive rod to stop one, causing the drive rod to move downwards and thus causing one end of the filter plate to move downwards. When one end moves downward, the stop block three can keep the filter plate in a horizontal state. When the pressure plate moves downward, the filter plate is in a horizontal state, and the sludge outlet is located below the filter plate. During the sludge removal process, the sewage filtered by the filter plate can flow out through the outlet to wait for the next step of treatment. After all the sludge in the sewage in the device is filtered out, the motor rotates clockwise, and the spring resets, causing the connecting gear to mesh with the rack and drive gear again. Therefore, when the motor rotates clockwise, it will drive the connecting gear to rotate counterclockwise, which will cause the power rod to move upward. During the upward movement of the pressure plate, the upper surface of the pressure plate will push the stop block one at the upper end of the drive rod, causing the drive rod to move upward, which will cause the end of the filter plate that just moved downward to move upward. When one end of the filter plate moves upward, the filter plate is in an inclined state, and the sludge outlet is exposed. At this time, the baffle plate can be pulled out to open the sludge outlet and clean out the sludge filtered down from the filter plate through the sludge outlet.

[0017] In the above technical solution, the use of connecting gears, sliders and springs avoids motor overload and extends the service life of the device; the use of baffles two and three prevents unfiltered sewage from flowing out and improves the efficiency of the device.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a side sectional view of the structure of the pressure plate in the raised state of this utility model;

[0021] Figure 2 This is a side sectional view of the structure of the pressure plate in the lowered state of this utility model;

[0022] Figure 3 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 4 This is one of the schematic diagrams of the internal component structure of the device housing of this utility model;

[0024] Figure 5 This is one or two schematic diagrams of the internal components of the device housing of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Device housing; 2. Motor; 3. Drive gear; 4. Connecting gear; 5. Rack; 6. Power rod; 7. Slider; 8. Spring; 9. Pressure plate; 10. Water inlet trough; 11. Circular groove; 12. Movable shaft; 13. Sealing plate; 14. Rotating rod; 15. Filter plate; 16. Filter hole; 17. Sliding block; 18. Sliding groove; 19. Drive rod groove; 20. Drive rod; 21. Stop block one; 22. Stop block two; 23. Stop block three; 24. Mud outlet; 25. Through groove; 26. Mud baffle; 27. Water outlet; 28. Water inlet. Detailed Implementation

[0027] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0028] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0029] Please see Figure 1-5As shown, this utility model is a sludge and sewage separation device for dredging, including a device housing 1. A motor 2 is fixedly installed inside the device housing 1. A drive gear 3 is fixedly installed at the output end of the motor. A connecting gear 4 is meshed with the external of the drive gear 3. A rack 5 is meshed with the external of the connecting gear 4. The rack 5 and the drive gear 3 are located on the same horizontal plane. A power rod 6 is fixedly installed on the back of the rack 5. The connecting gear 4 is rotatably connected to the recess of the slider 7. The slider 7 is slidably connected inside the device housing 1. A spring 8 is fixedly installed on the back of the slider 7. The other end of the spring 8 is fixedly installed inside the device housing 1.

[0030] When dredging is required, motor 2 is started. The output end of motor 2 begins to rotate counterclockwise, driving the drive gear 3, which is fixedly installed at the output end, to rotate counterclockwise. The counterclockwise rotation of drive gear 3 drives the connecting gear 4 to rotate clockwise. The clockwise rotation of connecting gear 4 drives rack 5 to move downwards, and the downward movement of rack 5 drives power rod 6 to move downwards accordingly. Under normal circumstances, when the lower end of power rod 6 is blocked by silt and can no longer move downwards (i.e., rack 5 cannot move downwards), connecting gear 4 will not rotate, and similarly, drive gear 3 will not rotate. At this time, motor 2 is still in the starting state but cannot rotate, thus causing the motor to fall into an overload state, which will shorten the service life of the motor. However, when the power rod 6 cannot move downwards and the connecting gear 4 cannot rotate, the drive gear 3 still tends to rotate counterclockwise. This tendency causes the connecting gear 4 to move away from the drive gear 3 and rack 5. But because the connecting gear 4 is located inside the recess of the slider 7, and because the slider 7 is slidably connected to the inside of the device housing 1, the connecting gear 4, under the counterclockwise rotation tendency of the drive gear 3, drives the slider 7 away from the drive gear 3 and rack 5, and simultaneously compresses the spring 8. In this way, the drive gear 3 can rotate normally, preventing the motor 2 from falling into an overload state. After all the sludge in the sewage in the device is filtered out, the motor 2 rotates clockwise, and the spring 8 resets, causing the connecting gear 4 to mesh with the rack 5 and drive gear 3 again. Therefore, when the motor 2 rotates clockwise, it will drive the connecting gear 4 to rotate counterclockwise, thereby causing the power rod 6 to move upwards.

[0031] In one embodiment, for the aforementioned power rod 6, a pressure plate 9 is fixedly connected to the lower end of the power rod 6, a water inlet groove 10 is provided on the upper part of the pressure plate 9, a drive rod groove 19 is provided on the pressure plate 9, and the outside of the pressure plate 9 completely fills the inside of the device housing 1.

[0032] When the sludge filtration begins, the pressure plate 9 is located on the upper part of the device housing 1, and the unfiltered sewage enters the interior of the device housing 1 through the inlet tank 10.

[0033] In one embodiment, for the aforementioned power rod 6, a circular groove 11 is provided at the lower end of the power rod 6, a movable shaft 12 is movably installed inside the circular groove 11, and a sealing plate 13 is fixedly installed at the lower end of the movable shaft 12, the diameter of the sealing plate 13 being larger than that of the water inlet trough 10.

[0034] When the lower end of the power rod 6 is located at the upper end of the device housing 1, the movable shaft 12 inside the circular groove 11 will fall under the action of gravity. However, due to the special structure of the circular groove 11 and the movable shaft 12, the movable shaft 12 will not slide out of the circular groove 11. The sealing plate will further cause the movable shaft 12 to fall under the action of the sewage entering from the water inlet 10. When the sewage inside the device housing 1 reaches the fixed valve point, the power rod 6 moves downward and drives the pressure plate 9 to move downward. Under the action of the buoyancy of the sewage, the upper end face of the sealing plate 13 is pressed against the lower end face of the pressure plate 9, so that the sealing plate 13 blocks the water inlet 10. The sealing plate 13 is made of hard rubber.

[0035] In one embodiment, for the device housing 1, a rotatable rotating rod 14 is installed inside the device housing 1, and a filter plate 15 is fixedly installed outside the rotating rod 14. The filter plate 15 has small filter holes 16, and the filter plate 15 is slightly smaller than the internal area of ​​the device housing 1.

[0036] When the pressure plate 9 and the sealing plate 13 move downwards, they will squeeze the sewage toward the filter plate 15, and the tiny filter holes 16 on the filter plate 15 will filter out the sludge in the sewage squeezed toward the filter plate 15.

[0037] In one embodiment, for the filter plate 15, a sliding block 17 is fixedly installed on the filter plate 15, a sliding groove 18 is opened inside the sliding block 17, a drive rod 20 is slidably installed inside the sliding groove 18, the drive rod 20 passes through the drive rod groove 19, and a stop block 21 is fixedly installed at each of the upper and lower ends of the drive rod 20.

[0038] As the pressure plate 9 moves downward, its lower end face pushes the lower stop block 21 of the drive rod 20, causing the drive rod 20 to move downward and thus causing one end of the filter plate 15 to move downward. As the pressure plate 9 moves upward, its upper end face pushes the upper stop block 21 of the drive rod 20, causing the drive rod 20 to move upward and thus causing the end of the filter plate 15 that just moved downward to move upward.

[0039] In one embodiment, for the device housing 1, two staggered stop blocks 22 are fixedly installed inside the device housing 1, and two stop blocks 3 23 are fixedly installed inside the device housing 1, and the two stop blocks 3 23 can limit the position of the filter plate 15.

[0040] The two baffles 22 and the filter plate 15 can prevent unfiltered sewage from entering below the filter plate 15. When one end of the filter plate 15 moves downward, the baffle 3 23 can make the filter plate 15 horizontal.

[0041] In one embodiment, for the aforementioned three-block 23, a mud outlet 24 is provided in the middle part between the three-block 23 and the two-block 22. A through groove 25 is provided on the inner wall of the mud outlet 24. A mud baffle 26 is provided in the mud outlet 24, and the mud baffle 26 can slide through the through groove 25.

[0042] When sewage is injected, the baffle plate 26 blocks the sludge outlet 24. When the pressure plate 9 moves downward, the filter plate 15 is in a horizontal state, and the sludge outlet 24 is located below the filter plate 15. When one end of the filter plate 15 moves upward, the filter plate 15 is in an inclined state, and the sludge outlet 24 is exposed. At this time, the baffle plate 26 can be pulled out to open the sludge outlet 24, and the sludge filtered down from the filter plate 15 can be cleaned out through the sludge outlet 24.

[0043] In one embodiment, the device housing 1 has a water outlet 27 at its lower end and a water inlet 28 at its upper end.

[0044] At the start of dredging, wastewater can be injected into the device housing 1 through the inlet. During the dredging process, the wastewater filtered by the filter plate 15 can flow out through the outlet 27 to await further treatment.

[0045] In summary, with the help of the above-mentioned technical solution of this utility model, sewage can be injected into the device housing through the inlet at the beginning of dredging. When sewage is injected, the baffle plate blocks the sludge outlet. Before sludge filtration begins, the pressure plate is located at the upper part of the device housing, and the unfiltered sewage enters the device housing through the inlet trough. When the lower end of the power rod is located at the upper end of the device housing, the movable shaft inside the circular groove will fall under the action of gravity. However, due to the special structure of the circular groove and the movable shaft, the movable shaft will not slide out of the circular groove. The sealing plate will further cause the movable shaft to fall under the action of the sewage entering from the inlet trough. When the sewage inside the device reaches the fixed valve point, the power rod moves downward, which in turn moves the pressure plate downward. Under the buoyancy of the sewage, the upper surface of the sealing plate presses tightly against the lower surface of the pressure plate, blocking the water inlet. The sealing plate is made of hard rubber. When sludge removal is required, the motor is started. The output end of motor 2 begins to rotate counterclockwise, driving the drive gear fixedly installed at the output end to rotate counterclockwise. The counterclockwise rotation of the drive gear drives the connecting gear to rotate clockwise. The clockwise rotation of the connecting gear drives the rack to move downward, and the downward movement of the rack drives the power rod to move downward accordingly. Under normal circumstances, when the lower end of the power rod is blocked by sludge and cannot move downward, i.e., the rack cannot move downward, the connecting gear will not rotate. Similarly, the drive gear will not rotate. At this time, the motor is still in the starting state but cannot rotate, thus causing the motor to fall into an overload state, which will shorten the service life of the motor.However, when the power rod cannot move downwards and the connecting gear cannot rotate, the drive gear still tends to rotate counterclockwise. This tendency causes the connecting gear to move away from the drive gear and rack. However, because the connecting gear is located inside the recess of the slider and because the slider is slidably connected to the inside of the device housing, the connecting gear, under the counterclockwise rotation tendency of the drive gear, drives the slider away from the drive gear and rack and simultaneously compresses the spring. In this way, the drive gear can rotate normally, preventing the motor from falling into an overload state. When the pressure plate and sealing plate move downwards, they will squeeze the sewage towards the filter plate, and the tiny filter holes on the filter plate will filter out the sludge in the sewage squeezed towards the filter plate. The two stops and the filter plate can prevent unfiltered sewage from entering below the filter plate. During the downward movement of the pressure plate, the lower end face of the pressure plate pushes the lower end of the drive rod to stop one, causing the drive rod to move downwards and thus causing one end of the filter plate to move downwards. When one end moves downward, the stop block three can keep the filter plate in a horizontal state. When the pressure plate moves downward, the filter plate is in a horizontal state, and the sludge outlet is located below the filter plate. During the sludge removal process, the sewage filtered by the filter plate can flow out through the outlet to wait for the next step of treatment. After all the sludge in the sewage in the device is filtered out, the motor rotates clockwise, and the spring resets, causing the connecting gear to mesh with the rack and drive gear again. Therefore, when the motor rotates clockwise, it will drive the connecting gear to rotate counterclockwise, which will cause the power rod to move upward. During the upward movement of the pressure plate, the upper surface of the pressure plate will push the stop block one at the upper end of the drive rod, causing the drive rod to move upward, which will cause the end of the filter plate that just moved downward to move upward. When one end of the filter plate moves upward, the filter plate is in an inclined state, and the sludge outlet is exposed. At this time, the baffle plate can be pulled out to open the sludge outlet and clean out the sludge filtered down from the filter plate through the sludge outlet.

[0046] In the above technical solution, the use of connecting gears, sliders, and springs avoids motor overload and extends the service life of the device; the use of baffles two and three prevents unfiltered wastewater from flowing out, improving the efficiency of the device.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sludge-sewage separation device for dredging, characterized in that: The device includes a housing (1), a motor (2) is fixedly installed inside the housing (1), a drive gear (3) is fixedly installed at the output end of the motor (2), a connecting gear (4) is meshed with the external of the drive gear (3), a rack (5) is meshed with the external of the connecting gear (4), the rack (5) and the drive gear (3) are located on the same horizontal plane, a power rod (6) is fixedly installed on the back of the rack (5), the connecting gear (4) is rotatably connected to the recess of the slider (7), the slider (7) is slidably connected inside the housing (1), a spring (8) is fixedly installed on the back of the slider (7), and the other end of the spring (8) is fixedly installed inside the housing (1).

2. The sludge-sewage separation device for dredging according to claim 1, characterized in that: The lower end of the power rod (6) is fixedly connected to a pressure plate (9), and a water inlet groove (10) is opened on the upper part of the pressure plate (9). A drive rod groove (19) is opened on the pressure plate (9), and the outside of the pressure plate (9) completely fills the inside of the device housing (1).

3. The sludge-sewage separation device for dredging according to claim 2, characterized in that: The lower end of the power rod (6) is provided with a circular groove (11), and a movable shaft (12) is movably installed inside the circular groove (11). A sealing plate (13) is fixedly installed at the lower end of the movable shaft (12), and the diameter of the sealing plate (13) is larger than that of the water inlet groove (10).

4. The sludge-sewage separation device for dredging according to claim 1, characterized in that: The device housing (1) is equipped with a rotatable rotating rod (14) inside, and a filter plate (15) is fixedly installed on the outside of the rotating rod (14). The filter plate (15) has small filter holes (16) on it, and the filter plate (15) is slightly smaller than the internal area of ​​the device housing (1).

5. The sludge-sewage separation device for dredging according to claim 4, characterized in that: A sliding block (17) is fixedly installed on the filter plate (15). A sliding groove (18) is opened inside the sliding block (17). A drive rod (20) is slidably installed inside the sliding groove (18). The drive rod (20) passes through the drive rod groove (19). A stop block (21) is fixedly installed at both the upper and lower ends of the drive rod (20).

6. The sludge-sewage separation device for dredging according to claim 1, characterized in that: Two stop blocks (22) are fixedly and alternately installed inside the housing (1) of the device, and two stop blocks (23) are fixedly installed inside the housing (1). The two stop blocks (23) can limit the position of the filter plate (15).

7. A sludge-sewage separation device for dredging according to claim 6, characterized in that: A mud outlet (24) is provided in the middle of the three-block (23) and the two-block (22). A through groove (25) is provided on the inner wall of the mud outlet (24). A mud baffle (26) is provided in the mud outlet (24). The mud baffle (26) can slide through the through groove (25).

8. The sludge-sewage separation device for dredging according to claim 1, characterized in that: The device housing (1) has a water outlet (27) at the lower end and a water inlet (28) at the upper end.

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