Constructional sludge dewatering device

Abstract

This application relates to a construction sludge dewatering treatment device, belonging to the technical field of sludge dewatering. It includes a housing, a filter cylinder, a drive shaft, and an auger arranged coaxially. The drive shaft is rotatably disposed inside the filter cylinder, and the auger is wound and fixed on the drive shaft. The filter cylinder is rotatably disposed inside the housing. A cleaning assembly and a screw are provided between the outer wall of the filter cylinder and the inner wall of the housing. The cleaning assembly includes a positioning ring, an inner ring, and a cleaning brush. The screw is arranged along the length of the filter cylinder and passes through the positioning ring. The positioning ring is threadedly connected to the screw, and the screw rotates relative to the housing. The positioning ring is sleeved around the outside of the filter cylinder and slides along the length of the screw. The inner ring is rotatably disposed on the positioning ring, with its rotation axis being the central axis of the filter cylinder. The inner ring is located on the side of the positioning ring closer to the filter cylinder. The inner ring rotates relative to the positioning ring and slides synchronously with the positioning ring relative to the filter cylinder. The cleaning brush is located on the side of the inner ring facing the filter cylinder and abuts against the outer wall of the filter cylinder. This application improves the convenience of cleaning and maintenance of the screw press dewatering machine.

Description

Technical Field

[0001] This application relates to the technical field of sludge dewatering, and in particular to a sludge dewatering treatment device for construction sludge. Background Technology

[0002] Initially, the main method for treating waste mud was to transport it to a spoil heap using tanker trucks. However, this method had significant limitations. The mud production was large and had a high water content, with approximately 80% of the transported mud being water. This resulted in low efficiency and high costs, and the mud was prone to spillage during transportation, affecting the road environment. Furthermore, urban vehicle management issues often hindered the transport of mud and project progress. In addition, the long-term storage of mud at spoil heaps could adversely affect surrounding water resources and the construction environment, causing environmental pollution problems.

[0003] Later, for construction sludge, a screw press dewatering machine was used for mechanical pressing and dewatering. The pre-dewatered sludge entered the screw press through the feed hopper. Under the action of the variable diameter screw, the volume was compressed, and the water was quickly separated through the perforated filter cylinder. The moisture content of the solids gradually decreased, forming a filter cake, which was discharged from the machine under the action of the screw conveyor.

[0004] In practical applications, screw press dewatering machines need to be cleaned after use. The filter cartridge, in particular, needs to be cleaned. Personnel need to disassemble the outer casing to clean the filter cartridge, which makes the cleaning and maintenance of screw press dewatering machines inconvenient. Summary of the Invention

[0005] To improve the convenience of cleaning and maintenance of screw press dewatering machines, this application provides a dewatering treatment device for construction sludge.

[0006] The construction sludge dewatering treatment device provided in this application adopts the following technical solution: A construction sludge dewatering treatment device includes a housing, a filter cylinder, a drive shaft, and an auger arranged coaxially. The drive shaft is horizontally positioned inside the filter cylinder, and the auger is wound and fixed on the drive shaft. The diameter of the drive shaft gradually increases along the length of the filter cylinder, and the edge of the auger abuts against the inner wall of the filter cylinder. The filter cylinder is rotatably positioned inside the housing. A cleaning assembly and a screw are arranged between the outer wall of the filter cylinder and the inner wall of the housing. The cleaning assembly includes a positioning ring, an inner ring, and a cleaning brush. The screw is arranged along the length of the filter cylinder and passes through the positioning ring. The positioning ring is threadedly connected to the screw and rotates relative to the housing. The positioning ring is sleeved around the outside of the filter cylinder and slides along the length of the screw. The inner ring is rotatably positioned on the positioning ring with the rotation axis being the central axis of the filter cylinder. The inner ring is located on the side of the positioning ring closer to the filter cylinder. The inner ring rotates relative to the positioning ring and slides synchronously with the positioning ring relative to the filter cylinder. The cleaning brush is located on the side of the inner ring facing the filter cylinder and abuts against the outer wall of the filter cylinder. The cleaning brush is slidably positioned on the inner ring and slides in the direction close to or away from the filter cylinder.

[0007] By adopting the above technical solution, the sludge is pushed by the auger. Since the drive shaft is a variable diameter drive shaft, as the space gradually decreases, the water in the sludge is gradually squeezed out. At the same time, the mud cake is also transported out by the auger. After the sludge is dewatered, the screw is rotated. Since the positioning ring is fitted on the filter cylinder, it is limited by the filter cylinder and cannot rotate. Finally, the positioning ring drives the cleaning brush to slide along the length of the filter cylinder on the outer wall of the filter cylinder to clean the filter cylinder. The operation is simple and convenient, which improves the convenience of cleaning and maintenance of the screw press dewatering machine.

[0008] Optionally, a motor is fixed on the outer wall of the housing, one end of the screw protrudes from the housing, and a pulley set is provided between the motor and the screw for synchronous rotation of the two.

[0009] By adopting the above technical solution, the output shaft of the motor drives the screw to rotate through the pulley assembly, making full use of the motor as a power source and improving energy utilization.

[0010] Optionally, the positioning ring has a groove located on the side of the positioning ring closer to the inner ring. The groove runs around the inner wall of the positioning ring, and the outer edge of the inner ring is located within the groove. A rack is fixed inside the outer shell along the length of the screw. The rack passes through the positioning ring and also through the groove. A worm is rotatably mounted on the positioning ring. A spur gear is fixed on the worm with a ring sleeve. The worm is horizontally mounted on the inner wall of the groove and rotates relative to the positioning ring. The length of the worm is perpendicular to the length of the screw. The spur gear meshes with the rack. A turbine is fixed on the outer wall of the inner ring and meshes with the worm.

[0011] By adopting the above technical solution, during the movement of the positioning ring and inner ring along the length of the screw, the spur gear and rack are in a meshing state. This causes the spur gear to passively rotate, driving the worm gear, which in turn drives the turbine gear. The final state is that as the positioning ring and cleaning brush move along the length of the screw, the inner ring causes the cleaning brush to rotate relative to the positioning ring. This simultaneous movement in both directions improves the cleaning efficiency of the cleaning brush on the filter cartridge.

[0012] Optionally, the rotation axis of the filter cartridge coincides with its own horizontal central axis. When the motor drives the filter cartridge to rotate clockwise, the inner ring drives the cleaning brush to rotate counterclockwise around the horizontal central axis of the filter cartridge.

[0013] By adopting the above technical solution, when the filter cartridge is rotated clockwise during use, the inner ring drives the cleaning brush to rotate counterclockwise around the horizontal central axis of the filter cartridge. The rotation in the opposite direction increases the area of ​​the cleaning brush in contact with the outer wall of the filter cartridge per unit time, further improving the cleaning effect of the cleaning brush on the filter cartridge.

[0014] Optionally, a discharge box is fixed to the outer wall of the housing. The discharge box is located at the end of the housing away from the motor and is connected to the end of the filter cartridge. The end of the drive shaft extends to the discharge box. The diameter of the area of ​​the drive shaft inside the discharge box remains unchanged. A sealing plug, a spring, and a baffle are provided on the area of ​​the drive shaft inside the discharge box. The baffle is fixed to the drive shaft. One end of the spring is fixed to the baffle, and the other end is fixed to the sealing plug. The sealing plug is annularly sleeved on the drive shaft to seal the gap between the filter cartridge and the drive shaft. The sealing plug slides in the direction close to or away from the filter cartridge. A push assembly is provided inside the discharge box to drive the sealing plug to slide closer to the filter cartridge.

[0015] By adopting the above technical solution, the mud cake is continuously conveyed by the auger and finally pushed out of the outer shell through the gap between the inner wall of the filter cylinder and the outer wall of the drive shaft into the discharge box. When the mud cake is about to be pushed out of the outer shell, the reciprocating sealing plug performs a second compression on the mud cake, achieving the effect of secondary dewatering.

[0016] Optionally, the push assembly includes a first bevel gear, a second bevel gear, a connecting rod, and a cam. A crossbar is fixed between the first bevel gear and the drive shaft, with the center line of the crossbar coinciding with the center line of the drive shaft. The second bevel gear is ring-fixed on the connecting rod, and one end of the connecting rod is fixedly connected to the cam. The circumferential outer wall of the cam abuts against the side wall of the sealing plug away from the filter cartridge. The first bevel gear meshes with the second bevel gear. A connecting box is fixed on the crossbar, and both the first and second bevel gears are located inside the connecting box.

[0017] By adopting the above technical solution, the motor drives the drive shaft to rotate, the drive shaft drives the first bevel gear to rotate through the crossbar, and the first bevel gear drives the cam to rotate through the second bevel gear and the connecting rod, ultimately pushing the sealing plug. The push assembly makes full use of the motor as a power source and realizes the intermittent pushing of the sealing plug.

[0018] Optionally, multiple cleaning brushes are provided, with adjacent cleaning brushes spaced apart along the inner ring length direction.

[0019] Optionally, a telescopic rod is provided between the cleaning brush and the inner ring, and an elastic element for extending the length of the telescopic rod is provided inside the telescopic rod.

[0020] By adopting the above technical solution, the elastic element exerts a thrust on the telescopic rod, ensuring that the bristles of the cleaning brush are always pressed against the outer wall of the filter cartridge, thereby improving the cleaning effect of the cleaning brush on the outer wall of the filter cartridge.

[0021] Optionally, a collection box is fixed to the bottom of the outer casing. The collection box is open at the top, and a water outlet is provided at the bottom of the outer casing. A water outlet pipe is provided at the bottom of the collection box.

[0022] By adopting the above technical solution, the mud and water squeezed out of the silt flows into the collection box through the water outlet and is collected through the water outlet pipe, thus protecting the construction environment.

[0023] Optionally, the inner wall of the bottom of the collection box is inclined, and the inclination direction is downward along the direction close to the water outlet pipe.

[0024] By adopting the above technical solution, the inclined bottom inner wall of the collection box facilitates the flow of mud and water into the outlet pipe.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The arrangement of the screw, rack, spur gear, worm gear, and worm shaft ensures that as the positioning ring moves along the length of the screw along with the cleaning brush, the inner ring drives the cleaning brush to rotate relative to the positioning ring. 2. When the filter cartridge is rotated clockwise during use, the inner ring drives the cleaning brush to rotate counterclockwise around the horizontal central axis of the filter cartridge. The rotation in the opposite direction increases the area of ​​the cleaning brush in contact with the outer wall of the filter cartridge per unit time, further improving the cleaning effect of the cleaning brush on the filter cartridge. 3. The push assembly makes full use of the motor as a power source and realizes the intermittent pushing of the sealing plug. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a vertical sectional view of an embodiment of this application; Figure 3 This is an exploded view of a portion of the material discharge box structure; Figure 4 This is a partial structural diagram hidden behind the outer shell; Figure 5 Is Figure 4 The partial structural diagram behind the positioning ring is further hidden on the basis of this. Figure 6 This is a partial structural cross-sectional view of the positioning ring; Figure 7 yes Figure 6 A magnified view of part A in the diagram.

[0027] In the diagram, 1. Outer shell; 11. Filter cartridge; 12. Feed hopper; 13. Drive shaft; 14. Screw; 15. Motor; 16. Sealing plate; 161. Ring; 17. Screw; 18. Rack; 2. Cleaning assembly; 21. Positioning ring; 211. Groove; 22. Inner ring; 221. Turbine; 23. Cleaning brush; 3. Pulley assembly; 4. Worm gear; 41. Spur gear; 5. Discharge box; 51. Sealing plug; 52. Spring; 53. Baffle; 54. Crossbar; 55. Connecting box; 6. Pushing assembly; 61. First bevel gear; 62. Second bevel gear; 63. Connecting rod; 64. Cam; 7. Telescopic rod; 71. Elastic element; 8. Collection box; 81. Water outlet pipe. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0029] This application discloses a device for dewatering construction sludge.

[0030] refer to Figure 1 and Figure 2 A construction sludge dewatering treatment device includes a housing 1, on which a filter cylinder 11, a drive shaft 13, a motor 15, an auger 14, a discharge box 5, a feed hopper 12, and a collection box 8 are arranged. The housing 1 is placed horizontally. The horizontal central axes of the filter cylinder 11, the housing 1, the drive shaft 13, and the auger 14 are collinear. The filter cylinder 11 is located inside the housing 1, and there is a gap between the outer wall of the filter cylinder 11 and the inner wall of the housing 1. The drive shaft 13 is rotatably mounted inside the filter cylinder 11. The auger 14 is wound around the outer wall of the drive shaft 13. The edge of the blades of the auger 14 abuts against the inner wall of the filter cylinder 11. The motor 15 is fixed to the outer wall of the outer shell 1. The rotating end of the motor 15 passes through the outer shell 1 and is fixedly connected to one end of the drive shaft 13. The motor 15 drives the drive shaft 13 to rotate, and the drive shaft 13 drives the auger 14 to start rotating relative to the outer shell 1. At this time, the edge of the blades of the auger 14 is in a sliding contact with the inner wall of the filter cylinder 11. The discharge box 5 is fixedly connected to the end of the outer shell 1 away from the motor 15. The discharge box 5 is connected to the end face of the filter cylinder 11 away from the motor 15. The diameter of the drive shaft 13 increases along the direction closer to the discharge box 5. The motor 15 drives the auger 14 to rotate. The auger 14 moves the sludge towards the discharge box 5 and squeezes out the mud and water. The mud cake finally falls into the discharge box 5.

[0031] refer to Figure 2 , Figure 3 and Figure 4One end of the filter cylinder 11 is connected to the inside of the discharge box 5, and a sealing plate 16 is fixed at the other end of the filter cylinder 11. The sealing plate 16 completely seals the end face of the filter cylinder 11. The sealing plate 16 includes a ring 161, which is rotatably mounted on the sealing plate 16. The rotation axis of the ring 161 coincides with the horizontal central axis of the filter cylinder 11. The bottom end of the feed hopper 12 passes through the outer shell 1 and the ring 161 in sequence and then connects to the inside of the filter cylinder 11.

[0032] refer to Figure 2 , Figure 3 and Figure 4 The end of the drive shaft 13 extends to the discharge box 5. The diameter of the area of ​​the drive shaft 13 inside the discharge box 5 remains unchanged. A sealing plug 51, a spring 52 and a baffle 53 are provided on the area of ​​the drive shaft 13 inside the discharge box 5. The baffle 53 is fixed on the drive shaft 13. One end of the spring 52 is fixed to the baffle 53 and the other end is fixed to the sealing plug 51. The sealing plug 51 is annularly sleeved on the drive shaft 13. The sealing plug 51 slides in the direction of approaching or moving away from the filter cartridge 11. After the sealing plug 51 slides in the direction of approaching the filter cartridge 11, it finally seals the gap between the filter cartridge 11 and the drive shaft 13.

[0033] refer to Figure 2 , Figure 3 and Figure 4 The discharge box 5 is equipped with a push assembly 6 for driving the sealing plug 51 to slide towards the filter cartridge 11. The push assembly 6 includes a first bevel gear 61, a second bevel gear 62, a connecting rod 63, and a cam 64. The discharge box 5 is also equipped with a connecting box 55 and a crossbar 54. The center line of the crossbar 54 coincides with the center line of the drive shaft 13. One end of the crossbar 54 is fixedly connected to the center of the first bevel gear 61, and the other end is fixedly connected to the center of the end of the drive shaft 13 away from the motor 15. The first bevel gear 61 and the second bevel gear 62 are both located in the connecting box 55 and are rotating relative to the connecting box 55. The connecting box 55 is fixedly connected to the crossbar 54. The second bevel gear 62 is ring-fixed on the connecting rod 63, and the end of the connecting rod 63 is fixedly connected to the cam 64. In this embodiment, there are two cams 64. The circumferential outer wall of the cam 64 abuts against the side wall of the sealing plug 51 away from the filter cartridge 11, and the first bevel gear 61 and the second bevel gear 62 mesh. When the motor 15 starts, the drive shaft 13 drives the cam 64 to rotate through the crossbar 54 and the push assembly 6. The rotation of the cam 64 makes full use of the motor 15 as a power source, intermittently driving the sealing plug 51 to move in the direction close to the filter cartridge 11.

[0034] refer to Figure 2The filter cartridge 11 is porous, meaning it is covered with water-permeable holes. Multiple water outlets are located at the bottom of the outer casing 1, spaced apart along its length. The collection box 8 is fixed to the bottom of the outer casing 1. The top of the collection box 8 is open, and a water outlet pipe 81 connects to the center of its bottom. The inner wall of the bottom of the collection box 8 is inclined, with the inclination direction downwards towards the water outlet pipe 81.

[0035] refer to Figure 2 , Figures 4 to 7 The outer casing 1 contains a screw 17, a rack 18, and a cleaning assembly 2. The screw 17 and rack 18 are both arranged parallel to each other along the length of the filter cartridge 11. The screw 17 is rotatably mounted inside the outer casing 1, while the rack 18 is fixed inside the outer casing 1. The end of the screw 17 near the motor 15 extends to the outside of the outer casing 1. A pulley assembly 3 is provided between the screw 17 and the motor 15. The pulley assembly 3 includes two pulleys and a belt. The end of the screw 17 located outside the outer casing 1 is fixed to one of the pulleys. Another pulley is ring-fixed to the rotating shaft of the motor 15. The belt ring is fitted onto the two pulleys, allowing the motor 15 to drive the screw 17 to rotate when it rotates. The screw 17 rotates relative to the outer casing 1.

[0036] refer to Figures 4 to 7The cleaning component 2 includes a positioning ring 21, an inner ring 22, and a cleaning brush 23. A groove 211 is formed on the inner wall of the positioning ring 21, extending circumferentially along its length. The edge of the inner ring 22 is located within the groove 211. Both the screw 17 and the rack 18 pass through the positioning ring 21, with the rack 18 also passing through the groove 211. The positioning ring 21 is threadedly connected to the screw 17. The positioning ring 21 is fitted around the outside of the filter cartridge 11 and slides along the length of the screw 17. The inner ring 22 is rotatably mounted on the positioning ring 21, with its rotation axis being the central axis of the filter cartridge 11. The inner ring 22 is located on the side of the positioning ring 21 closer to the filter cartridge 11. The inner ring 22 rotates relative to the positioning ring 21 and slides synchronously with the positioning ring 21 relative to the filter cartridge 11. A worm gear 4 is rotatably mounted on the inner wall of the groove 211. The worm gear 4 is horizontally mounted on the inner wall of the groove 211 and rotates relative to the positioning ring 21. The length of the worm gear 4 is perpendicular to the length of the screw 17. A spur gear 41 is fixed to the worm 4 via a ring sleeve, and the spur gear 41 meshes with the rack 18. A turbine 221 is fixed to the outer wall of the inner ring 22 via a ring sleeve, and the turbine 221 meshes with the worm 4. During the movement of the positioning ring 21 and the inner ring 22 along the length of the screw 17, the spur gear 41 and the rack 18 are in a meshing state, thus the spur gear 41 passively rotates. The spur gear 41 drives the worm 4 to rotate, and the worm 4 drives the turbine 221 to rotate. Finally, during the movement of the positioning ring 21 and the cleaning brush 23 along the length of the screw 17, the inner ring 22 drives the cleaning brush 23 to rotate relative to the positioning ring 21. The rotation axis of the filter cartridge 11 coincides with its own horizontal central axis. When the motor 15 drives the filter cartridge 11 to rotate clockwise, the inner ring 22 drives the cleaning brush 23 to rotate counterclockwise around the horizontal central axis of the filter cartridge 11.

[0037] refer to Figures 4 to 7 The cleaning brush 23 is located on the inner ring 22 facing the filter cartridge 11 and abuts against the outer wall of the filter cartridge 11. The cleaning brush 23 is slidably mounted on the inner ring 22 and slides in the direction of approaching or moving away from the filter cartridge 11. A telescopic rod 7 is provided between the cleaning brush 23 and the inner ring 22. One end of the telescopic rod 7 is fixedly connected to the cleaning brush 23, and the other end is fixedly connected to the inner ring 22. An elastic element 71 is provided inside the telescopic rod 7. In this embodiment, the elastic element 71 is a conventional linear spring. The rebound force of the linear spring causes the telescopic rod 7 to tend to extend its own length. Multiple cleaning brushes 23 are provided, and adjacent cleaning brushes 23 are spaced apart along the length direction of the inner ring 22. The cleaning brush 23 is arc-shaped, and the concave surface of the arc faces the filter cartridge 11.

[0038] The implementation principle of the construction sludge dewatering treatment device in this application embodiment is as follows: Sludge is put into the filter cylinder 11 from the feed hopper 12. The motor 15 is started, and the motor 15 drives the auger 14 and the cam 64 to rotate at the same time. Since the drive shaft 13 is a variable diameter drive shaft 13, as the space gradually decreases, the water in the sludge is gradually squeezed out, and the mud and water gather into the collection box 8. The mud cake is transported out by the auger 14 through the gap between the inner wall of the filter cylinder 11 and the outer wall of the drive shaft 13. When the mud cake is about to enter the discharge box 5, the cam 64 pushes the sealing plug 51 to perform secondary compression on the mud cake, forming a secondary dewatering effect. After the sludge is dewatered, the belt in the pulley group 3 is put on, and the motor 15 drives the screw 17 to rotate. Since the positioning ring 21 is fitted on the filter cylinder 11, it is limited by the filter cylinder 11 and cannot rotate. Finally, the positioning ring 21 drives the cleaning brush 23 to slide along the length of the filter cylinder 11 on the outer wall of the filter cylinder 11. At the same time, the cleaning brush 23 rotates relative to the positioning ring 21 and cleans the filter cylinder 11. The operation is simple and convenient, which improves the convenience of cleaning and maintenance of the screw press dewatering machine.

[0039] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A construction sludge dewatering treatment device, comprising a housing (1), a filter cylinder (11), a drive shaft (13), and an auger (14) arranged coaxially, wherein the drive shaft (13) is horizontally arranged inside the filter cylinder (11), the auger (14) is wound and fixed on the drive shaft (13), the diameter of the drive shaft (13) gradually increases along the length of the filter cylinder (11), the edge of the auger (14) abuts against the inner wall of the filter cylinder (11), and the filter cylinder (11) is rotatably arranged inside the housing (1), characterized in that: A cleaning assembly (2) and a screw (17) are provided between the outer wall of the filter cartridge (11) and the inner wall of the outer shell (1). The cleaning assembly (2) includes a positioning ring (21), an inner ring (22), and a cleaning brush (23). The screw (17) is arranged along the length of the filter cartridge (11) and passes through the positioning ring (21). The positioning ring (21) is threadedly connected to the screw (17). The screw (17) is set to rotate relative to the outer shell (1). The positioning ring (21) is sleeved on the outside of the filter cartridge (11) and slides along the length of the screw (17). The inner ring (22) is rotatably set on the positioning ring (21) and the rotation axis is the central axis of the filter cartridge (11). The inner ring (22) is located near the filter cartridge (11) of the positioning ring (21). On one side, the inner ring (22) rotates relative to the positioning ring (21) and slides synchronously with the positioning ring (21) relative to the filter cartridge (11). The cleaning brush (23) is located on the side of the inner ring (22) facing the filter cartridge (11) and abuts against the outer wall of the filter cartridge (11). The cleaning brush (23) is slidably set on the inner ring (22) and slides in the direction close to or away from the filter cartridge (11). The outer wall of the outer shell (1) is fixed with a discharge box (5). The discharge box (5) is located at the end of the outer shell (1) away from the motor (15). The discharge box (5) is connected to the end of the filter cartridge (11). The end of the drive shaft (13) extends to the discharge box (5). The diameter of the area of ​​the drive shaft (13) inside the discharge box (5) remains constant. The drive shaft (13) is equipped with a sealing plug (51), a spring (52), and a baffle (53) in the area inside the discharge box (5). The baffle (53) is fixed on the drive shaft (13). One end of the spring (52) is fixed to the baffle (53), and the other end is fixed to the sealing plug (51). The sealing plug (51) is annularly fitted on the drive shaft (13) to seal the gap between the filter cartridge (11) and the drive shaft (13). The sealing plug (51) slides in the direction of approaching or moving away from the filter cartridge (11). The discharge box (5) is equipped with a push assembly (6) for driving the sealing plug (51) to slide in the direction of approaching the filter cartridge (11). The push assembly (6) includes a first cone. The first bevel gear (61), the second bevel gear (62), the connecting rod (63), and the cam (64) are fixed together. A crossbar (54) is fixed between the first bevel gear (61) and the drive shaft (13). The center line of the crossbar (54) coincides with the center line of the drive shaft (13). The second bevel gear (62) is fixedly ring-fitted onto the connecting rod (63). One end of the connecting rod (63) is fixedly connected to the cam (64). The outer circumferential wall of the cam (64) abuts against the side wall of the sealing plug (51) away from the filter cartridge (11). The first bevel gear (61) meshes with the second bevel gear (62). A connecting box (55) is fixed on the crossbar (54). The first bevel gear (61) and the second bevel gear (62) are both located inside the connecting box (55).

2. The construction sludge dewatering treatment device according to claim 1, characterized in that: A motor (15) is fixed on the outer wall of the outer shell (1), and one end of the screw (17) extends out of the outer shell (1). A pulley set (3) is provided between the motor (15) and the screw (17) for synchronous rotation of the two.

3. The construction sludge dewatering treatment device according to claim 2, characterized in that: The positioning ring (21) has a groove (211) on it. The groove (211) is located on the side of the positioning ring (21) close to the inner ring (22). The groove (211) is opened around the inner wall of the positioning ring (21). The outer edge of the inner ring (22) is located in the groove (211). A rack (18) is fixed inside the outer shell (1) along the length direction of the screw (17). The rack (18) passes through the positioning ring (21) and also passes through the groove (211). A worm (4) is rotatably arranged on the positioning ring (21). A spur gear (41) is fixed on the worm (4). The worm (4) is horizontally arranged on the inner wall of the groove (211) and rotates relative to the positioning ring (21). The length direction of the worm (4) is perpendicular to the length direction of the screw (17). The spur gear (41) meshes with the rack (18). A worm wheel (221) is fixed on the outer wall of the inner ring (22). The worm wheel (221) meshes with the worm (4).

4. The construction sludge dewatering treatment device according to claim 3, characterized in that: The rotation axis of the filter cartridge (11) coincides with its own horizontal central axis. When the motor (15) drives the filter cartridge (11) to rotate clockwise, the inner ring (22) drives the cleaning brush (23) to rotate counterclockwise with the horizontal central axis of the filter cartridge (11) as the rotation axis.

5. The construction sludge dewatering treatment device according to claim 1, characterized in that: Multiple cleaning brushes (23) are provided, and adjacent cleaning brushes (23) are spaced apart along the length direction of the inner ring (22).

6. The construction sludge dewatering treatment device according to claim 1, characterized in that: A telescopic rod (7) is provided between the cleaning brush (23) and the inner ring (22), and an elastic element (71) for extending the length of the telescopic rod (7) is provided inside the telescopic rod (7).

7. The construction sludge dewatering treatment device according to claim 1, characterized in that: The bottom of the outer shell (1) is fixed with a collection box (8), which is open at the top and has a water outlet at the bottom; the bottom of the collection box (8) is provided with a water outlet pipe (81).

8. The construction sludge dewatering treatment device according to claim 7, characterized in that: The bottom inner wall of the collection box (8) is inclined, and the inclination direction is downward along the direction close to the water outlet pipe (81).

Images