Rapid dehydration device for slurry

Abstract

The rapid mud dewatering device comprises a rack, a dewatering cylinder, a separation assembly, a mud residue collecting frame, a waste water collecting frame and a discharging assembly, the dewatering cylinder is fixed in an opening of the rack, a feeding port, a waste discharging port and two residue outlets are formed in the dewatering cylinder, the residue outlets are located between the feeding port and the waste discharging port, and the waste discharging port is located in the discharging assembly. The dewatering assembly comprises a rotating shaft, a fixing block and a transmission part, two spaces are formed between the protruding part on the rotating shaft and the fixing block, sludge in one space can be dewatered, solid residues in the other space can be discharged, untreated sludge is put into the other space, and therefore the waiting time is shortened, and the sludge dewatering efficiency is improved. And the separation assembly can filter solid residues from wastewater after sludge separation treatment, and when the surface of filter cloth is full of the solid residues, a third air cylinder drives a clamping roller to vertically move, so that the solid residues on the filter cloth can automatically fall into a sludge collecting frame.

Description

A rapid mud dewatering device Technical Field

[0001] This invention discloses a rapid sludge dewatering device, belonging to the field of sludge treatment technology. Background Technology

[0002] The slag treatment process generates a large amount of wastewater, which forms sludge after sedimentation in a settling tank. This sludge has a high water content and cannot be directly used for resource utilization such as making eco-friendly bricks; therefore, dewatering treatment is necessary to reduce its moisture content. Existing sludge dewatering equipment, such as plate and frame filter presses and centrifugal dewatering machines, while achieving solid-liquid separation, generally suffers from low dewatering efficiency, low automation, and poor sludge discharge. Especially for highly viscous sludge, the resulting sludge cake tends to stick to the sludge discharge port after dewatering, making it difficult to fall off automatically and affecting continuous operation efficiency. Furthermore, the wastewater generated during dewatering still contains some solid residue; direct discharge would cause secondary pollution, requiring further separation treatment. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to provide a rapid dewatering device for mud.

[0004] This invention achieves the above-mentioned objectives through the following technical solution: a rapid slurry dewatering device, comprising a frame, a dewatering cylinder, a dewatering assembly, a sludge collection frame, a wastewater collection frame, and a discharge assembly. The dewatering cylinder is fixed within the open portion of the frame and has an inlet, a waste outlet, and two slag outlets. The slag outlets are located between the inlet and the waste outlet. The dewatering assembly includes a rotating shaft, a fixing block, and a transmission component. The rotating shaft is rotatably connected to both the dewatering cylinder and the frame, and has a protruding portion inside the dewatering cylinder. The fixing block is fixedly installed at the waste outlet of the dewatering cylinder and includes a connecting portion and two fan-shaped components in a V-shape. The machine consists of a connecting part that connects two fan-shaped parts, each fan-shaped part having multiple filter holes. One end of the protrusion engages with the inner wall of the dewatering cylinder, and the other end of the fan-shaped part engages with the outer wall of the rotating shaft. There is a space for placing sludge between the protrusion and the fan-shaped part. The transmission component is mounted on the frame and the rotating shaft and is used to drive the rotating shaft to rotate back and forth by a preset angle. The frame is equipped with a sealing assembly for sealing the slag outlet. The wastewater collection frame is located below the waste discharge outlet. A separation assembly is provided on the frame above the wastewater collection frame. The feeding assembly is mounted on the frame, and the feeding port of the feeding assembly is located directly above the feeding inlet.

[0005] Preferably, the sealing assembly includes a first cylinder and a sealing block. The first cylinder is fixed to the side of the frame, and the sealing block is fixed to the piston of the first cylinder. One end of the sealing block is engaged with the slag outlet. An inclined slag guide plate is fixedly installed on the frame.

[0006] Preferably, the sealing block is provided with a plurality of pull rods, the pull rods are stepped rods, and the diameter of the end of the pull rod away from the sealing block is larger than that of the other end.

[0007] Preferably, the transmission component is provided in two sets, and the transmission component includes a gear, a rack, a guide block, and a second cylinder. The gear is fixed on the rotating shaft, the guide block and the second cylinder are mounted on the frame, the rack is slidably disposed with the guide block, and the rack meshes with the gear for transmission, and the piston of the second cylinder is fixedly connected to one end of the rack.

[0008] Preferably, the separation assembly includes a take-up roller, an unwind roller, a guide roller, a clamping roller, a third cylinder, and a first motor. Two guide rollers are provided. The unwind roller, guide roller, and take-up roller are all rotatably connected to the frame. Two clamping rollers and two third cylinders are provided. Slider blocks are provided at both ends of the two clamping rollers, and the two clamping rollers are arranged in an upper-lower opposing configuration. The third cylinder is mounted on the frame, and its piston is fixedly connected to the slider. The frame has a groove for the slider to slide vertically. The highest point of contact between the two clamping rollers is higher than the highest point of the guide roller. A filter cloth is provided on the unwind roller, with one end of the filter cloth passing between the guide roller and the two clamping rollers and being wound onto the take-up roller. The first motor is fixed to the frame, and its output shaft is fixedly connected to the unwind roller. The unwind roller and take-up roller are located above the sludge collection frame.

[0009] Preferably, the fan-shaped portion has a drainage groove between the two connecting portions.

[0010] Preferably, the feeding assembly includes a feeding hopper, a feeding roller, and a second motor. The feeding hopper is fixedly mounted on the frame, and the feeding roller is rotatably mounted in the discharge port of the feeding hopper and is rotatably connected to the feeding hopper. The feeding roller is provided with a discharge hole. The second motor is fixed on the feeding hopper, and the output shaft of the second motor is fixedly connected to the feeding roller.

[0011] Preferably, the dewatering cylinder includes a cylinder body and a sealing cover, the feed inlet, the waste outlet and two slag outlets are located on the cylinder body, and the sealing cover is fixedly connected to the cylinder body by bolts.

[0012] Preferably, the frame is also provided with two support shafts, one end of the slag guide plate and the outer wall of the support shaft both abut against the outer wall of the dewatering cylinder, and provide multi-point support for the dewatering cylinder.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting up a dewatering cylinder, a rotating shaft, a fixed block and a transmission component, the protrusion on the rotating shaft and the fixed block form two dewatering spaces in the dewatering cylinder, so that while the protrusion dewaters the sludge in one space, it can discharge the solid residue in the other space and put in new sludge. In this way, there is no need to wait for the sludge discharge to be completed before the second dewatering can be carried out, which effectively improves the dewatering efficiency.

[0014] 2. By setting up a separation component, when filtering wastewater after sludge dewatering, the filter cloth is held by two clamping rollers and forms a V-shape between two guide rollers. When the filter cloth becomes clogged, the first motor drives the filter cloth to unwind, thus continuously filtering the wastewater. When the filter cloth is full of solid residue, the third cylinder drives the two clamping rollers to move upward, so that the position where the two clamping rollers abut against each other is higher than the guide rollers. In this way, the solid residue can fall smoothly into the two sludge collection frames along the filter cloth. Attached Figure Description

[0015] Figure 1 is a structural schematic diagram of a rapid mud dewatering device according to the present invention; Figure 2 is a structural schematic diagram of the internal structure of the dewatering cylinder according to the present invention; Figure 3 is a structural schematic diagram of the dewatering cylinder, slag guide plate, and sealing assembly according to the present invention; Figure 4 is a structural schematic diagram of the rotating shaft and protrusion according to the present invention; Figure 5 is a structural schematic diagram of the sealing assembly according to the present invention; Figure 6 is a structural schematic diagram of the fixing block according to the present invention; Figure 7 is a structural schematic diagram of the dewatering cylinder according to the present invention; Figure 8 is a structural schematic diagram of the separation assembly according to the present invention; Figure 9 is a structural schematic diagram of the discharge assembly according to the present invention; Reference numerals: 1, discharge hopper; 2, second motor; 3, guide block; 4, gear; 5, rack; 6, second cylinder; 7, first motor; 8. Frame; 9. Sludge collection frame; 10. First cylinder; 11. Sealing block; 12. Support shaft; 13. Transmission component; 14. Wastewater collection frame; 15. Separation assembly; 16. Fixing block; 17. Protrusion; 18. Rotating shaft; 19. Feed inlet; 20. Dewatering cylinder; 21. Sludge guide plate; 22. Pulling rod; 23. Fan-shaped part; 24. Filter hole; 25. Water leakage groove; 26. Connecting part; 27. Cylinder; 28. Sludge outlet; 29. ​​Waste discharge outlet; 30. Sealing cover; 31. Unwinding roller; 32. Guide roller; 33. Filter cloth; 34. Rewinding roller; 35. Discharge roller; 36. Clamping roller; 37. Third cylinder; 38. Slider; 39. Discharge hole. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] As shown in Figures 1-9, a rapid mud dewatering device includes a frame 8, a dewatering cylinder 20, a dewatering assembly, a mud collection frame 9, a wastewater collection frame 14, and a discharge assembly. The dewatering cylinder 20 is fixed inside the opening of the frame 8 and has a feed inlet 19, a waste outlet 29, and two slag outlets 28. The slag outlets 28 are located between the feed inlet 19 and the waste outlets 29. The dewatering assembly includes a rotating shaft 18, a fixing block 16, and a transmission component 13. The rotating shaft 18 is rotatably connected to both the dewatering cylinder 20 and the frame 8, and has a protrusion 17 inside the dewatering cylinder 20. The fixing block 16 is fixedly installed at the waste outlet 29 of the dewatering cylinder 20 and includes a connecting part 26 and two V-shaped structures. The fan-shaped part 23 is connected by a connecting part 26. The fan-shaped part 23 has multiple filter holes 24. One end of the protrusion 17 is engaged with the inner wall of the dewatering cylinder 20, and one end of the fan-shaped part 23 is engaged with the outer wall of the rotating shaft 18. There is a space for placing sludge between the protrusion 17 and the fan-shaped part 23. The transmission component 13 is installed on the frame 8 and the rotating shaft 18 and is used to drive the rotating shaft 18 to rotate back and forth at a preset angle. The frame 8 is provided with a sealing component for sealing the slag outlet 28. The wastewater collection frame 14 is located below the waste discharge outlet 29. The frame 8 is provided with a separation component 15 above the wastewater collection frame 14. The discharge component is installed on the frame 8, and the discharge port of the discharge component is located directly above the feed inlet 19.

[0018] The sealing assembly includes a first cylinder 10 and a sealing block 11. The first cylinder 10 is fixed to the side of the frame 8, and the sealing block 11 is fixed to the piston of the first cylinder 10. One end of the sealing block 11 is engaged with the slag outlet 28. An inclined guide plate 21 is fixedly installed on the frame 8. When the first cylinder 10 drives the sealing block 11 to close the slag outlet 28, the sludge between the protrusion 17 and the fixed block 16 will not be discharged from the slag outlet 28, thus enabling the dewatering action to proceed smoothly. After the dewatering is completed, the first cylinder 10 drives the sealing block 11 away from the slag outlet 28, allowing the solid residue to fall onto the guide plate 21 and slide smoothly into the sludge collection frame 9.

[0019] The sealing block 11 is equipped with multiple pulling rods 22. The pulling rods 22 have a stepped structure, and the diameter of the end of the pulling rod 22 away from the sealing block 11 is larger than that of the other end. After dewatering, the solid residue is compacted into a cake-like structure and blocks the slag outlet 28, preventing it from falling off automatically. By setting the pulling rods 22, when the first cylinder 10 drives the sealing block 11 away from the dewatering cylinder 20, the pulling rods 22 move synchronously with the sealing block 11. In this way, the pulling rods 22 exert a pulling force on the cake-like solid residue, causing the solid residue to break, thereby better completing the slag discharge action.

[0020] The transmission component 13 is provided in two sets, and the transmission component 13 includes a gear 4, a rack 5, a guide block 3, and a second cylinder 6. The gear 4 is fixed on the rotating shaft 18, and the guide block 3 and the second cylinder 6 are mounted on the frame 8. The rack 5 is slidably disposed with the guide block 3, and the rack 5 meshes with the gear 4 for transmission. The piston of the second cylinder 6 is fixedly connected to one end of the rack 5. The piston of the second cylinder 6 drives the rack 5 to move vertically and reciprocally, so that the rack 5 drives the gear 4 and the rotating shaft 18 to rotate back and forth at a preset angle. When the rotating shaft 18 drives the protrusion 17 to rotate toward one side of the fixed block 16, the sludge in one space can be dewatered. When the rotating shaft drives the protrusion 17 to rotate toward the other side of the fixed block 16, the sludge in the other space can be dewatered. The two sets of transmission components 13 can apply a larger rotational force arm to the rotating shaft 18, thereby improving the sludge dewatering rate to a greater extent.

[0021] The separating assembly 15 includes a take-up roller 34, an unwind roller 31, a guide roller 32, a clamping roller 36, a third cylinder 37, and a first motor 7. Two guide rollers 32 are provided. The unwind roller 31, guide roller 32, and take-up roller 34 are all rotatably connected to the frame 8. Two clamping rollers 36 and two third cylinders 37 are provided. Slider blocks 38 are provided at both ends of the two clamping rollers 36, and the two clamping rollers 36 are arranged in an upper and lower opposing configuration. The third cylinder 37 is mounted on the frame 8, and the piston of the third cylinder 37 is fixed to the slider 38. The frame 8 has a groove for the vertical sliding of the slider 38. The highest point of the two clamping rollers 36 contacting each other is higher than the highest point of the guide roller 32. A filter cloth 33 is provided on the unwinding roller 31. One end of the filter cloth 33 passes between the guide roller 32 and the two clamping rollers 36 and is wound onto the take-up roller 34. The first motor 7 is fixed to the frame 8, and the output shaft of the first motor 7 is fixedly connected to the unwinding roller 31. The unwinding roller 31 and the take-up roller 34 are located above the sludge collection frame 9. During the dewatering process, the two rollers are positioned above the sludge collection frame 9. The filter cloth 33 between the guide rollers 32 forms a V-shape under the clamping action of the two clamping rollers 36. When wastewater containing some solid residue falls onto the filter cloth 33, the wastewater can pass through the filter cloth 33 and fall into the wastewater collection frame 14 to achieve secondary filtration, while the solid residue remains on the surface of the filter cloth 33. After the filter cloth 33 has been used for a period of time, it becomes clogged, causing the wastewater filtration efficiency to decrease. The first motor 7 drives the winding roller 34 to rotate, causing the filter cloth 33 to be unwound, thus creating a new filter cloth. The filter cloth 33 can continue to filter wastewater. When solid residue accumulates between the two guide rollers 32, the third cylinder 37 drives the two clamping rollers 36 to move upward, so that the two clamping rollers 36 clamp the filter cloth 33 at that position and move upward synchronously. When the filter cloth 33 held by the clamping rollers 36 exceeds the height of the guide rollers 32, the solid residue can automatically slide into the mud collection frames 9 on both sides along the filter cloth 33. Then the third cylinder 37 drives the clamping rollers 36 and the filter cloth 33 to reset, thereby continuing to filter wastewater.

[0022] The sector 23 has a drainage groove 25 between the two connecting parts 26. During the dewatering process, the rotating shaft 18 drives the protrusion 17 to rotate toward one side of the fixed block 16, thereby applying pressure to the sludge and squeezing out the wastewater in the sludge. The wastewater enters between the two sector 23 through the filter hole 24 and falls into the wastewater collection frame 14 from the waste outlet 29. After the dewatering is completed, the wastewater that fails to flow through the filter hole 24 will flow from the drainage groove 25 to the waste outlet 29, thereby reducing the water content of the solid residue between the protrusion 17 and the fixed block 16.

[0023] The feeding assembly includes a feeding hopper 1, a feeding roller 35, and a second motor 2. The feeding hopper 1 is fixedly installed on the frame 8. The feeding roller 35 is rotatably installed in the discharge port of the feeding hopper 1 and is rotatably connected to the feeding hopper 1. The feeding roller 35 is provided with a discharge hole 39. The second motor 2 is fixed on the feeding hopper 1, and the output shaft of the second motor 2 is fixedly connected to the feeding roller 35. The second motor 2 drives the feeding roller 35 to rotate, so that the discharge hole 39 is in a horizontal or vertical state, thereby controlling the amount of sludge from the feeding hopper 1 falling into the dewatering cylinder 20.

[0024] The dewatering cylinder 20 includes a cylinder body 27 and a sealing cover 30. The feed inlet 19, the waste outlet 29 and two slag outlets 28 are located on the cylinder body 27. The sealing cover 30 is fixedly connected to the cylinder body 27 by bolts. The dewatering cylinder 20 adopts an assembly design, which can facilitate the disassembly and assembly of the rotating shaft 18 and the fixing block 16 as well as subsequent cleaning work.

[0025] Two support shafts 12 are also provided on the frame 8. One end of the guide plate 21 and the outer wall of the support shaft 12 both abut against the outer wall of the dewatering cylinder 20, and provide multi-point support for the dewatering cylinder 20. With this design, the deformation of the dewatering cylinder 20 can be reduced when the dewatering cylinder 20 is dewatering the sludge, making the overall structure more robust and reliable.

[0026] Working principle: Sludge is fed into the discharge hopper 1, and the discharge roller 35 is driven by the second motor 2 to control the discharge action of the sludge. When the sludge enters one of the dewatering spaces formed by the protrusion 17 and the fixed block 16 from the feed port 19, the rack 5 is driven to slide by the second cylinder 6, and the gear 4 drives the rotating shaft 18 to rotate the protrusion 17, so that the protrusion 17 applies pressure to the sludge, thereby squeezing out the wastewater. The wastewater enters between the two fan-shaped sections 23 through the filter holes 24 and the water leakage trough 25, and then falls from the waste discharge port 29 onto the filter cloth 33. The filter cloth 33 can separate some of the solid residues and other impurities in the wastewater. After secondary filtration, the sludge falls into the wastewater collection box 14. At the same time, new sludge enters another dewatering space from the feed inlet 19. After the previous sludge dewatering is completed, the second cylinder 6 drives the rack 5 to slide in the opposite direction, and the rotating shaft 18 drives the protrusion 17 to dewater the new sludge for the second time. The first cylinder 10 drives the sealing block 11 away from the dewatering cylinder 20, and the pulling rod 22 crushes the cake-shaped solid residue, so that the solid residue falls smoothly from the slag outlet 28 into the sludge collection box 9. This process is repeated to achieve continuous dewatering. The waiting time during the dewatering process is short, which effectively improves the dewatering efficiency.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rapid mud dewatering device, comprising a frame (8), a dewatering cylinder (20), a dewatering assembly, a mud collection frame (9), a wastewater collection frame (14), and a discharge assembly, characterized in that, The dewatering cylinder (20) is fixed inside the opening of the frame (8), and the dewatering cylinder (20) has a feed inlet (19), a waste outlet (29) and two slag outlets (28). The slag outlets (28) are located between the feed inlet (19) and the waste outlets (29). The dewatering assembly includes a rotating shaft (18), a fixing block (16) and a transmission component (13). The rotating shaft (18) is rotatably connected to both the dewatering cylinder (20) and the frame (8), and the rotating shaft (18) has a protrusion (17) inside the dewatering cylinder (20). The fixing block (16) is fixedly installed at the waste outlet (29) of the dewatering cylinder (20), and the fixing block (16) includes a connecting part (26) and two fan-shaped parts (23) with a figure-eight structure. The connecting part (26) connects the two fan-shaped parts (23). (23) has multiple filter holes (24), one end of the protrusion (17) is engaged with the inner wall of the dewatering cylinder (20), one end of the fan-shaped part (23) is engaged with the outer wall of the rotating shaft (18), there is a space for placing sludge between the protrusion (17) and the fan-shaped part (23), the transmission component (13) is installed on the frame (8) and the rotating shaft (18) and is used to drive the rotating shaft (18) to rotate back and forth at a preset angle, the frame (8) is provided with a sealing component for sealing the slag outlet (28), the wastewater collection frame (14) is located below the waste discharge outlet (29), the frame (8) is provided with a separation component (15) above the wastewater collection frame (14), the discharge component is installed on the frame (8), and the discharge port of the discharge component is located directly above the feed inlet (19).

2. The rapid dewatering device for mud according to claim 1, characterized in that, The sealing assembly includes a first cylinder (10) and a sealing block (11). The first cylinder (10) is fixed on the side of the frame (8), and the sealing block (11) is fixed on the piston of the first cylinder (10). One end of the sealing block (11) is engaged with the slag outlet (28). An inclined slag guide plate (21) is fixedly installed on the frame (8).

3. The rapid dewatering device for mud according to claim 2, characterized in that, The sealing block (11) is provided with a plurality of pull rods (22), the pull rods (22) are stepped rod structures, and the diameter of the end of the pull rod (22) away from the sealing block (11) is larger than that of the other end.

4. The rapid dewatering device for mud according to claim 1, characterized in that, The transmission component (13) is provided in two sets, and the transmission component (13) includes a gear (4), a rack (5), a guide block (3), and a second cylinder (6). The gear (4) is fixed on the rotating shaft (18), the guide block (3) and the second cylinder (6) are mounted on the frame (8), the rack (5) is slidably disposed with the guide block (3), and the rack (5) meshes with the gear (4) for transmission. The piston of the second cylinder (6) is fixedly connected to one end of the rack (5).

5. The rapid dewatering device for mud according to claim 1, characterized in that, The separation assembly (15) includes a take-up roller (34), an unwind roller (31), a guide roller (32), a clamping roller (36), a third cylinder (37), and a first motor (7). Two guide rollers (32) are provided. The unwind roller (31), guide roller (32), and take-up roller (34) are all rotatably connected to the frame (8). Two clamping rollers (36) and two third cylinders (37) are provided. Slider blocks (38) are provided at both ends of the two clamping rollers (36), and the two clamping rollers (36) are arranged as upper and lower opposing rollers. The third cylinder (37) is mounted on the frame (8), and the movement of the third cylinder (37) is controlled by a motor. The plug is fixedly connected to the slider (38). The frame (8) has a groove for the slider (38) to slide vertically. The highest point of the two clamping rollers (36) that abut against each other is higher than the highest point of the guide roller (32). A filter cloth (33) is provided on the unwinding roller (31). One end of the filter cloth (33) passes between the guide roller (32) and the two clamping rollers (36) and is wound on the winding roller (34). The first motor (7) is fixed on the frame (8), and the output shaft of the first motor (7) is fixedly connected to the unwinding roller (31). The unwinding roller (31) and the winding roller (34) are located above the sludge collection frame (9).

6. The rapid dewatering device for mud according to claim 1, characterized in that, The fan-shaped portion (23) has a drainage groove (25) between the two connecting portions (26).

7. The rapid dewatering device for mud according to claim 1, characterized in that, The feeding assembly includes a feeding hopper (1), a feeding roller (35), and a second motor (2). The feeding hopper (1) is fixedly installed on the frame (8). The feeding roller (35) is rotatably installed in the discharge port of the feeding hopper (1) and is rotatably connected to the feeding hopper (1). The feeding roller (35) is provided with a discharge hole (39). The second motor (2) is fixed on the feeding hopper (1) and the output shaft of the second motor (2) is fixedly connected to the feeding roller (35).

8. The rapid dewatering device for mud according to claim 1, characterized in that, The dewatering cylinder (20) includes a cylinder body (27) and a sealing cover (30). The feed inlet (19), waste outlet (29) and two slag outlets (28) are located on the cylinder body (27). The sealing cover (30) is fixedly connected to the cylinder body (27) by bolts.

9. The rapid dewatering device for mud according to claim 1, characterized in that, Two support shafts (12) are also provided on the frame (8). One end of the guide plate (21) and the outer wall of the support shaft (12) are in contact with the outer wall of the dewatering cylinder (20) and provide multi-point support for the dewatering cylinder (20).

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