Sludge dewatering device for sewage treatment

Abstract

The invention discloses a sludge dewatering device for sewage treatment, and belongs to the technical field of sewage treatment. Comprising a dewatering mechanism, a driving mechanism and an auxiliary mechanism, the dewatering mechanism comprises a filter bag, the driving mechanism comprises a rotary driving assembly, a movable driving assembly and two restraining parts, and the restraining parts are used for binding an opening of the filter bag; the rotary driving assembly is used for driving the restraining part at the bottom to rotate around the axis of the filter bag, and the movable driving assembly is used for driving the restraining part at the bottom to move in the axial direction of the filter bag; the auxiliary mechanism comprises an upper extrusion part, a lower extrusion part and an auxiliary driving assembly; the auxiliary driving assembly drives the lower extrusion part to move in the axial direction of the filter bag relative to the upper extrusion part; the problem that the service life of the filter bag is greatly shortened after long-time work due to the fact that the positions of the two ends of the filter bag are fixed and the pulling strength is large during screwing when the sludge is dewatered in a rotary screwing mode is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sludge dewatering device for sewage treatment. Background Art

[0002] In the field of sludge treatment, the dehydration process is the core link to reduce the volume of sludge and achieve solid-liquid separation. Sludge that has not been fully dehydrated usually contains 70%-90% water. Direct disposal will significantly increase transportation energy consumption and landfill costs. In addition, sludge with high water content is prone to leachate, which poses an environmental risk of polluting groundwater. The current mainstream technology mostly uses geotextile wrapping or filter bag mechanical dehydration solutions.

[0003] For example, a Chinese utility model patent with authorization announcement number CN208517260U discloses a sludge dewatering machine, which dewaters sludge by rotating and tightening filter bags. The machine has a simple structure and low cost. A large amount of sludge can be loaded in the filter bags at one time, and the processing capacity is large. The filter bags are cleaned by backblowing with high-pressure gas, which is easy to clean and simple to operate, thus facilitating the sludge dewatering operation. However, fixed constraints are adopted at both ends of the filter bags, resulting in the superposition of axial tensile stress and circumferential torsional stress of the filter bags, forming a mechanical stress concentration area, which has a large pulling strength on the filter bags. The service life of the filter bags is greatly reduced under long-term sludge dewatering operation. Summary of the invention

[0004] The present invention overcomes the shortcomings of the prior art and provides a sludge dewatering device for sewage treatment; it solves the problem that when dewatering sludge by rotating and tightening the filter bag, the two ends of the filter bag are fixed and the pulling strength is large when twisting, which leads to a significant reduction in the service life of the filter bag after long-term operation.

[0005] The present invention is achieved through the following technical solutions: A sludge dewatering device for sewage treatment, comprising a dewatering mechanism, a driving mechanism and an auxiliary mechanism; the dewatering mechanism comprises a feed pipe, a filter bag and a discharge pipe which are connected in sequence; the driving mechanism comprises a rotary driving assembly, a mobile driving assembly and two restraining components, the two restraining components are respectively arranged at the upper end and the lower end of the filter bag, and the restraining components are used to tighten the filter bag; the rotary driving assembly is used to drive the restraining component at the bottom to rotate around the axis of the filter bag, and the mobile driving assembly is used to drive the restraining component at the bottom to move along the axial direction of the filter bag; The auxiliary mechanism includes an upper extrusion piece, a lower extrusion piece and an auxiliary drive assembly; the bottom end of the upper extrusion piece extends to the interior of the filter bag, a sliding cavity is provided inside the bottom end of the upper extrusion piece, the outer wall of the lower extrusion piece is slidably connected to the inner wall of the sliding cavity, one side of the lower extrusion piece is connected to the auxiliary drive assembly, and the auxiliary drive assembly drives the lower extrusion piece to move axially relative to the upper extrusion piece along the filter bag.

[0006] Furthermore, the constraint component includes a constraint driving assembly and a plurality of drawstrings. The plurality of drawstrings are arranged in a circumferential array centered on the axis of the filter bag. One side of each of the plurality of drawstrings is respectively connected to the constraint driving assembly, and the constraint driving assembly is used to drive each of the plurality of drawstrings to move radially along the filter bag.

[0007] Furthermore, the constraint driving assembly includes a fixed housing. A plurality of racks are slidably mounted on the inner wall of the fixed housing. The plurality of racks correspond to the plurality of drawstrings one by one. One end of each of the plurality of racks is fixedly connected to its corresponding drawstring. One side of each of the plurality of racks meshes with a B gear. One side of the plurality of B gears meshes with the same internal gear ring. One side of the internal gear ring is rotatably connected to the inner wall of the fixed housing. A rotating shaft is fixedly sleeved inside each of the plurality of B gears. One end of each of the plurality of rotating shafts is respectively rotatably connected to the fixed housing. The other end of one of the rotating shafts is connected to an A rotary driving member for driving it to rotate around its own axis.

[0008] Furthermore, the moving driving assembly includes a turntable and two A telescopic driving members. The outer wall of the discharge pipe is movably connected to the turntable. The moving ends of the two A telescopic driving members respectively penetrate the turntable and are fixedly connected to the fixed housing inside the constraint component at the bottom. The fixed ends of the two A telescopic driving members are respectively fixedly connected to the turntable.

[0009] Furthermore, the rotary driving assembly includes an external gear ring, an A gear, and a B rotary driving member. The A gear is fixedly sleeved outside the output shaft of the B rotary driving member. One side of the A gear meshes with the external gear ring. The external gear ring is fixedly sleeved outside the turntable.

[0010] Furthermore, the auxiliary driving assembly includes a sleeve and a cylindrical groove formed in the lower pressing member. The top end of the sleeve is rotatably connected to the upper pressing member. A driving rod is slidably connected inside the sleeve. A push rod is fixedly installed on the outer wall of the bottom end of the sleeve. A spiral groove is formed on the inner wall of the cylindrical groove. The outer wall of the push rod is slidably connected to the inner wall of the spiral groove. A spring is arranged between the sleeve and the driving rod. The two ends of the spring are respectively fixedly connected to the sleeve and the driving rod.

[0011] Furthermore, a friction pad is covered at the bottom end of the driving rod.

[0012] Furthermore, the auxiliary driving assembly is a B telescopic driving member. The fixed end of the B telescopic driving member is fixedly connected to the upper pressing member. The moving end of the B telescopic driving member is fixedly connected to the lower pressing member.

[0013] Furthermore, it further includes a treatment chamber. A feed chute is arranged at the top of the treatment chamber. A partition plate is arranged inside the treatment chamber. The partition plate divides the interior of the treatment chamber into a dehydration area and a discharge area; the filter bag is arranged inside the dehydration area. The top end of the feed pipe penetrates the bottom plate of the feed chute and is fixedly connected to the bottom plate of the feed chute. The bottom end of the discharge pipe extends into the discharge area.

[0014] Further, multiple groups of corresponding dehydration mechanisms, driving mechanisms, and auxiliary mechanisms are evenly installed in the treatment chamber.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: The present invention rotates the filter bag around the axis by the rotation of the bottom constraint component to form a spiral extrusion of the sludge for dehydration. At the same time, the moving drive assembly drives the bottom constraint component to move upward, and the filter bag contracts axially, preventing the filter bag from rupturing due to stress concentration during the screwing process and extending the service life. Through the upper extrusion part and the lower extrusion part in the set auxiliary mechanism, when the sludge is rotated and squeezed at the bottom end of the filter bag, the lower extrusion part moves downward relative to the upper extrusion part, and the sludge is dispersed by mechanical pushing, effectively solving the problem of uneven dehydration in the central area of the traditional device and effectively improving the sludge dehydration efficiency and dehydration effect. Description of the Drawings

[0016] Figure 1 It is a schematic external three-dimensional structure diagram provided by an embodiment of the present invention; Figure 2 It is a schematic first partial cross-sectional structure diagram provided by an embodiment of the present invention; Figure 3 It is a combined schematic diagram of the rotary drive assembly, the moving drive assembly, and the constraint component provided by an embodiment of the present invention; Figure 4 It is a schematic structure diagram of the constraint component provided by an embodiment of the present invention; Figure 5 It is a combined schematic diagram of the feed pipe, the filter bag, and the discharge pipe provided by an embodiment of the present invention; Figure 6 It is a schematic second partial cross-sectional structure diagram provided by an embodiment of the present invention; Figure 7 It is provided by an embodiment of the present invention Figure 6 The enlarged schematic diagram at A in; Figure 8 It is a combined schematic diagram of the lower extrusion part, the cylindrical groove, and the spiral groove provided by an embodiment of the present invention; Figure 9 It is a combined schematic diagram of the upper extrusion part, the lower extrusion part, and the B telescopic drive part provided by an embodiment of the present invention.

[0017] Description of the Reference Numerals: 100, treatment chamber; 101, feed trough; 102, partition board; 103, dehydration area; 104, discharge area; 105, discharge port.

[0018] 200, dehydration mechanism; 210, feed pipe; 220, filter bag; 230, discharge pipe.

[0019] 300. Driving mechanism; 310. Rotary driving assembly; 311. Outer gear ring; 312. Gear A; 313. B rotary driving member; 320. Moving driving assembly; 321. Turntable; 322. A telescopic driving member; 330. Constraining member; 331. Mouth constricting member; 332. Fixed housing; 333. Rack; 334. Gear B; 335. Inner gear ring; 336. Rotating shaft; 337. A rotary driving member.

[0020] 400. Auxiliary mechanism; 410. Upper extrusion member; 420. Lower extrusion member; 430. Sleeve; 440. Driving rod; 441. Friction pad; 450. Cylindrical groove; 460. Push rod; 470. Spiral groove; 480. Spring; 490. B telescopic driving member. Detailed implementation manner

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention will be described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0022] Please refer to Figures 1 to 8 , this embodiment provides a sludge dewatering device for sewage treatment, including a treatment chamber 100. There is a feed trough 101 at the top of the treatment chamber 100. There is a partition plate 102 inside the treatment chamber 100. The partition plate 102 divides the interior of the treatment chamber 100 into a dewatering area 103 and a discharging area 104. A discharge port 105 is opened at the bottom end of the treatment chamber 100. It further includes: A plurality of dewatering mechanisms 200, which are evenly installed on the treatment chamber 100. The dewatering mechanism 200 includes a feed pipe 210, a filter bag 220 and a discharge pipe 230 arranged coaxially. The filter bag 220 is arranged inside the dewatering area 103. The top end of the feed pipe 210 penetrates through the bottom plate of the feed trough 101 and is fixedly connected to the bottom plate of the feed trough 101. The bottom end of the feed pipe 210 extends into the dewatering area 103 and is connected to the inside of the filter bag 220. The bottom end of the filter bag 220 is connected to the inside of the discharge pipe 230. The bottom end of the discharge pipe 230 extends into the discharging area 104; A plurality of driving mechanisms 300, which are installed inside the treatment chamber 100. The plurality of driving mechanisms 300 correspond to the plurality of dewatering mechanisms 200 one by one. The driving mechanism 300 includes a rotary driving assembly 310, a moving driving assembly 320 and two constraining members 330. The two constraining members 330 are respectively arranged at the upper and lower ends of the corresponding filter bag 220. The constraining member 330 is used to constrict the mouth of the filter bag 200; The rotation drive assembly 310 is used to drive the restraint member 330 located at the bottom to rotate around the axis of the filter bag 220, and the movement drive assembly 320 is used to drive the restraint member 330 located at the bottom to move axially along the filter bag 220; A plurality of auxiliary mechanisms 400, corresponding to the plurality of dewatering mechanisms 200 one by one. The auxiliary mechanism 400 includes an upper extrusion member 410, a lower extrusion member 420 and an auxiliary drive assembly. The top end of the upper extrusion member 410 is fixedly connected to the processing chamber 100. The bottom end of the upper extrusion member 410 extends into the corresponding filter bag 220. A sliding cavity is arranged inside the bottom end of the upper extrusion member 410. The outer wall of the lower extrusion member 420 is slidably connected to the inner wall of the sliding cavity. One side of the lower extrusion member 420 is connected to the auxiliary drive assembly, and the auxiliary drive assembly can drive the lower extrusion member 420 to move axially relative to the upper extrusion member 410 along the filter bag 220.

[0023] Specifically, the bottom end of the filter bag 220 is constricted by the restraint member 330 located at the bottom to prevent the sludge entering the filter bag 220 from directly discharging from the discharge pipe 230 without being dewatered. Then the sludge is conveyed into the feed trough 101 at the top of the processing chamber 100. The sludge enters the filter bag 220 from the feed pipe 210, and then the top end of the filter bag 220 is constricted by a plurality of constricting members 331 in the restraint member 330 at the top. At this time, the rotation drive assembly 310 drives the restraint member 330 at the bottom to rotate around the axis of the filter bag 220, and the movement drive assembly 320 drives the restraint member 330 at the bottom to move upward axially along the filter bag 220. The restraint member 330 at the bottom drives the bottom end of the filter bag 220 to rotate and move upward. The filter bag 220 twists and squeezes the sludge inside it to squeeze out the water in the sludge. The squeezed water enters the dewatering area 103. Since the restraint member 330 at the bottom drives the bottom end of the filter bag 220 to move upward, it can prevent the filter bag 220 from being pulled and broken during twisting, so that the sludge can be effectively dewatered. After dewatering, the rotation drive assembly 310 drives the restraint member 330 at the bottom to rotate reversely around the axis of the filter bag 220. The dewatered sludge is discharged to the discharge area 104 from the discharge port 105 and discharged from the discharge port 105; Although the filter bag 220 can dewater the sludge to a certain extent during twisting, due to the fixed diameter of the filter bag 220, the dewatering effect on the sludge at the center of the filter bag 220 is insufficient. Therefore, after the sludge enters the filter bag 220, the auxiliary drive assembly drives the lower extrusion member 420 to move downward, and the lower extrusion member 420 assists in squeezing the sludge to enhance the sludge dewatering effect by mechanical pressing. Moreover, the upper extrusion member 410 and the lower extrusion member 420 are arranged at the center of the filter bag 220, which can disperse the sludge to a certain extent to avoid poor dewatering effect of the sludge at the center.

[0024] In an embodiment of the present invention, the restraint member 330 includes a restraint driving assembly and a plurality of mouth tightening members 331. The plurality of mouth tightening members 331 are arranged in a circumferential array centered on the axis of the filter bag 220. One side of each of the plurality of mouth tightening members 331 is respectively connected to the restraint driving assembly. The restraint driving assembly is used to drive each of the plurality of mouth tightening members 331 to move radially along the filter bag 220. Specifically, the restraint driving assembly in the restraint member 330 located at the bottom drives each of the plurality of mouth tightening members 331 to move radially along the filter bag 220. The plurality of mouth tightening members 331 move to tighten the bottom end of the filter bag 220, so as to prevent the sludge entering the filter bag 220 from being directly discharged from the discharge pipe 230 without dehydration.

[0025] In an embodiment of the present invention, the restraint driving assembly includes a fixed housing 332. A plurality of racks 333 are slidably installed on the inner wall of the fixed housing 332. The plurality of racks 333 correspond to the plurality of mouth tightening members 331 one by one. One end of each of the plurality of racks 333 is fixedly connected to its corresponding mouth tightening member 331. One side of each of the plurality of racks 333 meshes with a B gear 334. One side of the plurality of B gears 334 meshes with the same internal gear ring 335. One side of the internal gear ring 335 is rotatably connected to the inner wall of the fixed housing 332. A rotating shaft 336 is fixedly sleeved inside each of the plurality of B gears 334. One end of each of the plurality of rotating shafts 336 is respectively rotatably connected to the fixed housing 332. The other end of one of the rotating shafts 336 is connected to an A rotary driving member 337 for driving it to rotate around its own axis. The A rotary driving member 337 is a rotary cylinder or a motor. The upper surface of the fixed housing 332 in the restraint member 330 located at the top is fixedly connected to the lower surface of the feed trough 101 through a bracket. Specifically, the A rotary driving member 337 drives the rotating shaft 336 to drive the B gear 334 to rotate. The B gear 334 meshes with the internal gear ring 335. The B gear 334 drives the internal gear ring 335 to rotate. The internal gear ring 335 drives the remaining plurality of B gears 334 to rotate, so as to realize the synchronous radial movement of the plurality of racks 333, thereby controlling the tightening or loosening of the port of the filter bag 220 by the mouth tightening member 331. The fixed housing 332 of the top restraint member 330 is fixed to the bottom plate of the feed trough 101 through a bracket, and the bottom restraint member 330 is movable.

[0026] In an embodiment of the present invention, the moving driving assembly 320 includes a turntable 321 and two A telescopic driving members 322. The turntable 321 is rotatably installed on the partition plate 102. The outer side wall of the discharge pipe 230 is movably connected to the corresponding turntable 321. The moving ends of the two A telescopic driving members 322 respectively penetrate through the turntable 321 and are fixedly connected to the fixed housing 332 inside the restraint member 330 located at the bottom. The fixed ends of the two A telescopic driving members 322 are respectively fixedly connected to the turntable 321. The A telescopic driving member 322 is a hydraulic cylinder or an electric telescopic rod. Specifically, two A telescopic driving members 322 push the fixed housing 332 of the bottom constraint member 330 to move axially along the filter bag 220, driving the bottom end of the filter bag 220 to rise or fall. The turntable 321 is movably connected to the discharge pipe 230. The discharge pipe 230 can rotate or move up and down relative to the turntable 321. A sealing ring is provided between the turntable 321 and the discharge pipe 230.

[0027] In an embodiment of the present invention, the rotary drive assembly 310 includes an external gear ring 311, an A gear 312, and a B rotary drive member 313. The B rotary drive member 313 is a motor or a rotary cylinder. The A gear 312 is fixedly sleeved outside the output shaft of the B rotary drive member 313. The B rotary drive member 313 is fixedly installed at the bottom of the partition plate 102. One side of the A gear 312 meshes with the external gear ring 311. The external gear ring 311 is fixedly sleeved outside the turntable 321. Specifically, the B rotary drive member 313 drives the A gear 312 to rotate. The A gear 312 drives the turntable 321 to rotate through the external gear ring 311. The turntable 321 drives the bottom end of the filter bag 220 to rotate through the moving drive assembly 320, so as to realize the screwing and squeezing of the sludge inside the filter bag 220.

[0028] In an embodiment of the present invention, the auxiliary drive assembly includes a sleeve 430 and a cylindrical groove 450 opened on the lower pressing member 420. The top end of the sleeve 430 is rotatably connected to the upper pressing member 410. A driving rod 440 is slidably connected inside the sleeve 430. A push rod 460 is fixedly installed on the outer side wall of the bottom end of the sleeve 430. A spiral groove 470 is opened on the inner wall of the cylindrical groove 450. The outer side wall of the push rod 460 is slidably connected to the inner wall of the spiral groove 470. A spring 480 is provided between the sleeve 430 and the driving rod 440 to facilitate the reset of the driving rod 440. The two ends of the spring 480 are respectively fixedly connected to the sleeve 430 and the driving rod 440. Specifically, a plurality of mouth-binding members 331 move radially along the filter bag 220 to shrink and bind the mouth of the filter bag 220. After the mouth-binding members 331 bind the mouth of the filter bag 220, they clamp the bottom end of the driving rod 440. Thus, when the constraint member 330 at the bottom rotates, it synchronously drives the driving rod 440 to rotate. The driving rod 440 drives the sleeve 430 to rotate. The push rod 460 on the sleeve 430 pushes against the inner wall of the spiral groove 470, thereby driving the lower pressing member 420 to move downward to realize mechanical pressing and enhance the sludge dewatering effect.

[0029] In an embodiment of the present invention, the bottom end of the driving rod 440 is coated with a friction pad 441 to enhance the friction force and prevent damage to the filter bag 220 due to excessive extrusion.

[0030] In an embodiment of the present invention, please refer to Figure 9, the auxiliary driving component can also be a B telescopic driving member 490. The B telescopic driving member 490 adopts a telescopic air cylinder or a hydraulic cylinder. The fixed end of the B telescopic driving member 490 is fixedly connected to the upper pressing member 410, and the moving end of the B telescopic driving member 490 is fixedly connected to the lower pressing member 420; Specifically, the telescopic movement of the moving end of the B telescopic driving member 490 drives the lower pressing member 420 to move up and down, so as to enhance the sludge dewatering effect through mechanical pressing.

[0031] In an embodiment of the present invention, a corresponding control unit can be set for cooperation. The control unit can select any one of the controllers and be connected to the electrical components in this application to control the opening and closing operations of each electrical component. This part is the prior art. Here, a single-chip microcomputer can be provided as the control unit for display. The single-chip microcomputer in this embodiment is a typical embedded microcontroller (Microcontroller Unit), which is composed of an arithmetic unit, a controller, a memory, input and output devices, etc., and is equivalent to a miniature computer. Compared with the general-purpose microprocessor applied in personal computers, it emphasizes more on self-supply (without external hardware) and cost savings. Its greatest advantage is its small volume and can be placed inside the instrument, but its storage capacity is small, the input and output interfaces are simple, and the function consumption is low.

[0032] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific embodiments of the present invention are limited to this. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the premise of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the patent protection scope determined by the claims submitted by the present invention.

Claims

1. A sludge dewatering device for sewage treatment, characterized in that, It includes a dehydration mechanism (200), a driving mechanism (300) and an auxiliary mechanism (400); the dehydration mechanism (200) includes a feed pipe (210), a filter bag (220) and a discharge pipe (230) that are connected in sequence; the driving mechanism (300) includes a rotation driving assembly (310), a movement driving assembly (320) and two constraint components (330). The two constraint components (330) are respectively arranged at the upper and lower ends of the filter bag (220), and the constraint component (330) is used to constrict the mouth of the filter bag (200); the rotation driving assembly (310) is used to drive the constraint component (330) at the bottom to rotate around the axis of the filter bag (220), and the movement driving assembly (320) is used to drive the constraint component (330) at the bottom to move along the axial direction of the filter bag (220). The auxiliary mechanism (400) includes an upper extrusion member (410), a lower extrusion member (420) and an auxiliary driving assembly; the bottom end of the upper extrusion member (410) extends into the filter bag (220), a sliding cavity is arranged inside the bottom end of the upper extrusion member (410), the outer side wall of the lower extrusion member (420) is slidably connected to the inner wall of the sliding cavity, one side of the lower extrusion member (420) is connected to the auxiliary driving assembly, and the auxiliary driving assembly drives the lower extrusion member (420) to move relative to the upper extrusion member (410) along the axial direction of the filter bag (220).

2. The sludge dewatering device for sewage treatment according to claim 1, characterized in that, The constraint component (330) includes a constraint driving assembly and a plurality of mouth constricting members (331). The plurality of mouth constricting members (331) are arranged in a circumferential array centered on the axis of the filter bag (220). One side of the plurality of mouth constricting members (331) is respectively connected to the constraint driving assembly, and the constraint driving assembly is used to drive the plurality of mouth constricting members (331) to move along the radial direction of the filter bag (220) respectively.

3. A sludge dewatering device for sewage treatment according to claim 2, characterized in that, The constraint driving assembly includes a fixed shell (332). A plurality of racks (333) are slidably installed on the inner wall of the fixed shell (332). The plurality of racks (333) correspond to the plurality of mouth constricting members (331) one by one. One end of the plurality of racks (333) is fixedly connected to its corresponding mouth constricting member (331). One side of the plurality of racks (333) is meshed with a B gear (334). One side of the plurality of B gears (334) is meshed with the same internal gear ring (335). One side of the internal gear ring (335) is rotatably connected to the inner wall of the fixed shell (332). A rotating shaft (336) is fixedly sleeved inside each of the plurality of B gears (334). One end of the plurality of rotating shafts (336) is respectively rotatably connected to the fixed shell (332). The other end of one of the rotating shafts (336) is connected to an A rotation driving member (337) for driving it to rotate around its own axis.

4. A sludge dewatering device for sewage treatment according to claim 3, characterized in that, The movement driving assembly (320) includes a turntable (321) and two A telescopic driving members (322). The outer side wall of the discharge pipe (230) is movably connected to the turntable (321). The moving ends of the two A telescopic driving members (322) respectively penetrate the turntable (321) and are fixedly connected to the fixed shell (332) inside the constraint component (330) at the bottom. The fixed ends of the two A telescopic driving members (322) are respectively fixedly connected to the turntable (321).

5. A sludge dewatering device for sewage treatment according to claim 4, characterized in that, The rotation drive assembly (310) includes an external gear ring (311), a gear A (312), and a rotary drive member B (313). The gear A (312) is fixedly sleeved outside the output shaft of the rotary drive member B (313). One side of the gear A (312) is engaged with the external gear ring (311), and the external gear ring (311) is fixedly sleeved outside the turntable (321).

6. The sludge dewatering device for sewage treatment according to claim 1, characterized in that, The auxiliary drive assembly includes a sleeve (430) and a cylindrical groove (450) formed in the lower pressing member (420). The top end of the sleeve (430) is rotatably connected to the upper pressing member (410). A drive rod (440) is slidably connected inside the sleeve (430). A push rod (460) is fixedly installed on the outer side wall of the bottom end of the sleeve (430). A spiral groove (470) is formed on the inner wall of the cylindrical groove (450). The outer side wall of the push rod (460) is slidably connected to the inner wall of the spiral groove (470). A spring (480) is arranged between the sleeve (430) and the drive rod (440). The two ends of the spring (480) are respectively fixedly connected to the sleeve (430) and the drive rod (440).

7. A sludge dewatering device for sewage treatment according to claim 6, wherein, A friction pad (441) is coated on the bottom end of the drive rod (440).

8. A sludge dewatering device for sewage treatment according to claim 1, characterized in that, The auxiliary drive assembly is a telescopic drive member B (490). The fixed end of the telescopic drive member B (490) is fixedly connected to the upper pressing member (410), and the movable end of the telescopic drive member B (490) is fixedly connected to the lower pressing member (420).

9. A sludge dewatering device for sewage treatment according to any one of claims 1-8, characterized in that, It further includes a processing chamber (100). A feed chute (101) is arranged at the top of the processing chamber (100). A partition plate (102) is arranged inside the processing chamber (100). The partition plate (102) divides the interior of the processing chamber (100) into a dehydration area (103) and a discharging area (104). A filter bag (220) is arranged inside the dehydration area (103). The top end of the feed pipe (210) penetrates through the bottom plate of the feed chute (101) and is fixedly connected to the bottom plate of the feed chute (101). The bottom end of the discharge pipe (230) extends into the discharging area (104).

10. A sludge dewatering device for sewage treatment according to any one of claims 9, characterized in that, Multiple groups of corresponding dehydration mechanisms (200), drive mechanisms (300), and auxiliary mechanisms (400) are evenly installed inside the processing chamber (100).

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