A sludge dewatering diaphragm plate and frame filter press

Abstract

This application relates to a sludge dewatering diaphragm plate and frame filter press, comprising a body with multiple filtration devices inside. Each filtration device includes a filter plate and a filter cloth. The end face of the filter plate has fixing grooves on both sides in the vertical direction and locking grooves at both ends in the vertical direction. The inner cavity of the fixing groove has at least two guide members, each including a fixing ring and a mounting ring. One fixing ring is installed at the end of the fixing groove, and the other fixing ring slides along the fixing groove. The mounting ring rotates coaxially with the fixing ring. The side wall of the mounting ring has two clamping plates, which are elastically hinged to the mounting ring, forming a clamping gap between the two clamping plates. The locking groove has an extension assembly, which includes an abutment plate and a movable plate. The abutment plate is installed on the filter plate, and the movable plate is slidably connected to the filter plate, forming a positioning gap between the abutment plate and the movable plate. The clamping gap and the positioning gap are used to accommodate the filter cloth. This application has the effect of flattening the filter cloth and fixing it to the filter plate.

Description

Technical Field

[0001] This application relates to the technical field of filter presses, and in particular to a sludge dewatering diaphragm plate and frame filter press. Background Technology

[0002] Plate and frame filter presses are a traditional solid-liquid separation equipment, widely used in raw material purification, product separation, pharmaceuticals, food, sludge dewatering, mining and other fields, and are closely related to the solid-liquid separation needs in industrial production.

[0003] In related technologies, a suspension is pumped into a filter chamber composed of alternating filter plates and filter frames by pressure. The filter cloth acts as a medium to trap solid particles, while the liquid (filtrate) passes through the filter cloth and is discharged. The solid (filter cake) accumulates in the filter chamber, achieving the purpose of separation. Subsequently, the filtrate and filter cake are separated.

[0004] Regarding the aforementioned technologies, in the prior art, the filter cloth is fixed to the surface of the filter frame by screws. When the operator replaces it, the filter cloth needs to be re-laid out and then fixed. When the filter cloth is poorly laid out, it will cause the filter cloth to fold, which will not be conducive to filtration and will reduce the filtration effect. Summary of the Invention

[0005] In order to better unfold the filter cloth and avoid filter cloth stacking, this application provides a sludge dewatering diaphragm plate and frame filter press.

[0006] This application provides a sludge dewatering diaphragm plate and frame filter press, which adopts the following technical solution:

[0007] A sludge dewatering diaphragm plate and frame filter press includes a machine body, and the inner cavity of the machine body is provided with multiple filtration devices, which are arranged sequentially along the long side of the machine body.

[0008] The filtration device includes a filter plate and a filter cloth. The end face of the filter plate is provided with fixing grooves on both sides in the vertical direction and locking grooves at both ends in the vertical direction.

[0009] The inner cavity of the fixing groove is provided with at least two guide members, each guide member including a fixing ring and a mounting ring. One fixing ring is installed at the end of the fixing groove, and the other fixing ring slides along the fixing groove. The mounting ring rotates coaxially with the fixing ring. The side wall of the mounting ring is provided with two clamping plates. The clamping plates are elastically hinged to the mounting ring, and a clamping gap is formed between the two clamping plates.

[0010] The locking groove is provided with an extension component, which includes an abutment plate and a movable plate. The abutment plate is installed on the filter plate, and the movable plate is slidably connected to the filter plate. A positioning gap is formed between the abutment plate and the movable plate.

[0011] The clamping gap and the positioning gap are used to accommodate the filter cloth.

[0012] By adopting the above technical solution, the elastic hinged clamping plate in the guide component forms an adaptive clamping gap, which can firmly clamp the edge of the filter cloth and prevent displacement or detachment during the dehydration process. At the same time, the elastic design simplifies the filter cloth disassembly and assembly process. The rotational connection between the mounting ring and the fixing ring can further flatten the filter cloth and prevent stacking. The movable plate of the extension component slides to adjust the positioning gap, which, together with the clamping gap, realizes multi-point fixation of the filter cloth, further preventing the filter cloth from loosening or wrinkling. At the same time, together with the clamping plate, the filter cloth can be fixed from four directions to prevent the filter cloth from shifting. In addition, the design of the guide component and the extension component has a certain degree of adjustability, which simplifies the adjustment of the filter cloth tension and better controls the installation effect of the filter cloth.

[0013] Optionally, the fixing ring is provided with a connecting groove, and the mounting ring is evenly distributed with a plurality of positioning grooves, and the connecting groove can communicate with the positioning grooves in sequence;

[0014] The fixing groove is provided with a positioning piece, which is rotatably connected to the fixing ring, and the two ends of the positioning piece are respectively located in the positioning groove and the connecting groove.

[0015] By adopting the above technical solution, the evenly distributed positioning grooves on the mounting ring are periodically aligned with the connecting grooves of the fixing ring. The positioning plates are snapped in to achieve multi-position angle fixation. When rotating the mounting ring, the angle of the clamping plate can be gradually adjusted, thereby precisely controlling the tension of the filter cloth and avoiding it being too loose (causing wrinkles) or too tight (causing tearing).

[0016] Optionally, the fixing groove is provided with a guide assembly, which includes a first screw, a limiting rod and a mounting block. The first screw is rotatably connected to the filter plate, the limiting rod is fixedly connected to the filter plate, and the mounting block is threadedly connected to the first screw and slidably connected to the limiting rod.

[0017] One of the fixing rings is fixedly connected to the mounting block, and the other mounting block is fixedly connected to the filter plate.

[0018] By adopting the above technical solution, the position of the fixing ring is controlled by rotating the first screw to drive the mounting block to slide along the limiting rod, thereby realizing stepless continuous adjustment of the filter cloth tension. The positions of multiple fixing rings can be adjusted simultaneously to ensure that the overall tension of the filter cloth is consistent, avoiding wrinkles or tears caused by local excessive looseness or tightness. For different sludge properties, the tension can be quickly adjusted to optimize the dewatering efficiency.

[0019] Optionally, the end faces of the clamping plates that are close to each other are serrated and mesh with each other.

[0020] By adopting the above technical solution, the serrated structure will produce a "gear meshing" effect when clamping the filter cloth, which will greatly increase the friction between the clamping plate and the filter cloth, prevent the filter cloth from being pulled out or displaced during high-pressure dehydration, and the elastic deformation capability of the serration can adapt to the thickness change of the filter cloth edge, ensuring that the clamping force is evenly distributed and avoiding local stress concentration that could damage the filter cloth.

[0021] Optionally, the extension assembly further includes a first spring and a cam, the two ends of the first spring being fixedly connected to the movable plate and the filter plate respectively; the cam being rotatably connected to the filter plate, and the sidewall of the cam being in contact with the movable plate.

[0022] By adopting the above technical solution, the first spring provides elastic support between the movable plate and the filter plate. When the filter cloth expands or displaces due to pressure changes during the dewatering process, the spring can automatically expand and contract to buffer the impact, avoid overload tearing or loosening of the filter cloth and leakage of mud. The displacement of the movable plate can be precisely controlled by rotating the cam, thereby finely adjusting the size of the positioning gap to adapt to filter cloths of different thicknesses or elasticities, and ensuring that the clamping force is always in the best state.

[0023] Optionally, the abutment plate is equipped with an adjusting bolt, the axis of which is parallel to the axis of the first spring. The adjusting bolt is threadedly connected to the filter plate and rotatably connected to the abutment plate.

[0024] By adopting the above technical solution, the spring pre-compression is adjustable: by rotating the adjusting bolt, the position of the abutment plate can be changed, thereby adjusting the initial compression of the first spring and achieving precise control of the filter cloth clamping force: tightening the bolt increases the spring pre-pressure and improves clamping stability; loosening the bolt reduces the pre-pressure and avoids excessive pressure damage to the filter cloth.

[0025] Optionally, the top of the machine body is provided with a top cover plate, and the top cover plate is provided with a placement groove for accommodating the filter plate;

[0026] The filter plate is provided with lifting lugs on its top wall.

[0027] By adopting the above technical solution, the filter plate can be quickly grabbed by the lifting equipment through the lifting lugs, realizing single-person operation and replacement without the need for multiple people to carry it. The limiting design of the placement slot makes the filter plate automatically aligned when it is placed, which improves the work efficiency of the operators.

[0028] Optionally, the inner wall of the top cover plate is provided with a cleaning device, the cleaning device including: a drive assembly, a first motor and a hydraulic cylinder, the drive assembly being used to drive the first motor to slide along the top cover plate, the first motor being used to drive the hydraulic cylinder to rotate along the top cover plate, the output end of the hydraulic cylinder being provided with a cleaning assembly, the cleaning assembly including a fixed tube, a support rod, a gear and a rack, the fixed tube being fixedly connected to the output end of the hydraulic cylinder, the support rod passing through the fixed tube and being rotatably connected to the fixed tube, the gear being rotatably connected to the support rod, and the rack being fixedly connected to the output end of the first motor, and the gear and the rack meshing;

[0029] The support rod is provided with multiple sets of striking elements at intervals. Each striking element includes a second spring and a striking block. The two ends of the second spring are fixedly connected to the support rod and the striking block, respectively.

[0030] By adopting the above technical solution, the drive component drives the first motor to slide along the top cover plate, ensuring that the cleaning device covers the entire inner wall area of ​​the cover plate. The hydraulic cylinder rotates to adjust the angle of the cleaning component, which can accurately clean corners or complex structures (such as protrusions and grooves). The support rod rotates through gear-rack meshing, driving the impact block to swing at high speed. Centrifugal force is used to peel off the adhered sludge or filter residue. The periodic impact of the impact block can crush the hardened sludge block. The second spring buffers the collision force between the impact block and the cover plate to avoid damaging the equipment, while enhancing the vibration cleaning effect.

[0031] Optionally, the cleaning device further includes a scraping assembly, which includes a scraping plate and is fixedly connected to the fixing tube. The scraping plate is attached to the filter cloth, and the bottom wall of the filter plate is evenly distributed with multiple mounting holes, each mounting hole housing a crushing block.

[0032] By adopting the above technical solution, the thin layer of sludge remaining on the surface of the filter cloth is directly scraped off, preventing pore blockage and maintaining the air permeability and filtration efficiency of the filter cloth. It is suitable for sticky sludge (such as oily sludge), avoiding secondary manual cleaning. The impacting parts vibrate and peel off large pieces of sludge to the scraper plate to clean up the fine residue, forming a fully automated "coarse cleaning + fine cleaning" process. The setting of the crushing blocks can break up stubborn filter cakes, making it easy for the scraper plate to clean them.

[0033] Optionally, the crushed block is equipped with a third spring, the two ends of which are fixedly connected to the scraper and the crushed block, respectively.

[0034] By adopting the above technical solution, when the crushed block encounters hard foreign objects (such as stones or metal fragments) or the mud cake is too thick, the third spring can be compressed and buffered to avoid rigid collisions that could damage the crushed block or filter plate structure, ensuring that the mud cake can be effectively crushed without being worn down by excessive pressure.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. By setting up a filtration device, and through the guide and extension components, the filter cloth fixing method can be optimized by an adaptive mechanism, taking into account the ease of operation, while fully unfolding the filter cloth for better fixing and improving the filtration effect.

[0037] 2. By setting up clamping plates, abutment plates, and movable plates, and through mechanical interlocking and indexing adjustment, the filter cloth fixing system achieves "precise adjustability" and "anti-interference stability," taking into account both operational efficiency and long-term reliability.

[0038] 3. By setting up a cleaning device, the filter cake on the surface of the filter cloth can be cleaned quickly, ensuring that the surface of the filter cloth remains clean, which facilitates subsequent related operations. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0040] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the cleaning device structure;

[0042] Figure 4 This is a schematic diagram of the filter plate structure;

[0043] Figure 5 This is a schematic diagram of the bootloader component structure;

[0044] Figure 6 yes Figure 5 Enlarged diagram of part A in the middle;

[0045] Figure 7 This is a structural schematic diagram of the extension component;

[0046] Figure 8 yes Figure 3 Enlarged schematic diagram of part B in the middle.

[0047] Reference numerals: 1. Body; 11. Top cover; 12. Placement slot; 13. Flip plate; 14. Piping device; 15. Slide rail; 16. Drive cylinder; 2. Filter device; 21. Filter plate; 211. Fixing slot; 212. Locking slot; 22. Guide assembly; 221. First screw; 222. Limiting rod; 223. Mounting block; 224. Connector; 23. Guide; 231. Fixing ring; 232. Mounting ring; 233. Positioning slot; 234. Connecting slot; 235. Positioning piece; 24. Clamping plate; 241. Friction pad; 242. Clamping gap; 25. Extension assembly; 26. 1. Abutment plate; 252. Movable plate; 253. Adjusting bolt; 254. First spring; 255. Cam; 256. Positioning gap; 26. Filter cloth; 3. Cleaning device; 31. Drive assembly; 311. Drive motor; 312. Second screw; 313. Mounting bracket; 32. First motor; 33. Hydraulic cylinder; 34. Cleaning assembly; 341. Fixed pipe; 342. Support rod; 343. Gear; 344. Rack; 35. Impacting component; 351. Second spring; 352. Impacting block; 36. Scraping assembly; 361. Scraping plate; 362. Third spring; 363. Crushing block. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0049] This application discloses a sludge dewatering membrane plate and frame filter press.

[0050] Reference Figure 1 , Figure 2 and Figure 3 A sludge dewatering diaphragm plate and frame filter press includes a machine body 1, a filtration device 2, and a cleaning device 3.

[0051] Reference Figure 1 The top of the body 1 is open, and a top cover 11 is provided at the opening, which can close the body 1.

[0052] Reference Figure 1 A sealing ring is sandwiched between the top cover plate 11 and the body 1, and the sealing ring is fixedly connected to the body 1 by screws.

[0053] Reference Figure 1 and Figure 3 The top cover plate 11 has a vertically penetrating placement groove 12. There are two placement grooves 12, which are arranged at intervals along the long side of the top cover plate 11. The inner cavity of the placement groove 12 is provided with a flip plate 13. The flip plate 13 is rotatably connected to the top cover plate 11 through a flipping motor. A sealing ring is sandwiched between the flip plate 13 and the machine body 1. The sealing ring is fixedly connected to the machine body 1 by screws.

[0054] Reference Figure 1 and Figure 3 The outer wall of the machine body 1 is provided with corresponding pipeline devices 14, including sludge pipeline, filtrate pipeline and compressed air pipeline. The sludge pipeline is used to supply liquid to the inner cavity of the machine body 1, the filtrate pipeline is used to draw out the filtrate in the inner cavity of the machine body 1, and the compressed air pipeline is used to inject and discharge compressed air into the inner cavity of the machine body 1.

[0055] Reference Figure 1 The bottom of the machine body 1 is equipped with a slag discharge port.

[0056] Reference Figure 1 and Figure 2 The inner cavity of the machine body 1 is provided with a slide rail 15 and a drive cylinder 16. There are two slide rails 15, which are located on both sides of the long side of the machine body 1. The slide rails are horizontally set and are fixedly connected to the machine body 1 by screws. The drive cylinder 16 is horizontally set and the driving direction of the drive cylinder 16 is parallel to the long side of the slide rail 15. The drive cylinder 16 is located between the two slide rails 15 and the outer shell of the drive cylinder 16 is fixedly connected to the machine body 1 by screws.

[0057] Reference Figure 2 The filter device 2 includes multiple filter plates 21. In this embodiment, the filter plate 21 is preferably a rectangular plate. The plate surface of the filter plate 21 has a through hole in the middle along the horizontal direction. The filter plate 21 is arrayed with filter holes. The axial direction of the through hole and the filter hole is parallel to the long side direction of the body 1.

[0058] Reference Figure 2 The filter plate 21 can pass through the placement slot 12.

[0059] Reference Figure 2 The top wall of the filter plate 21 is provided with a groove, and the inner cavity of the groove is provided with a lifting lug. The lifting lug is fixedly connected to the filter plate 21 by screws. Both sides of the filter plate 21 are provided with sliding parts. Each slide rail 15 is provided with a corresponding sliding part. The sliding part is fixedly connected to the filter plate 21 by screws. Here, the sliding part is sleeved on the slide rail 15 and can slide along the slide rail 15.

[0060] Reference Figure 2 , Figure 4 and Figure 5The filter plate 21 has two fixing grooves 211 on both sides. The two fixing grooves 211 are located on both sides of the vertical direction. Each fixing groove 211 has a guide component 22 in its inner cavity. The guide component 22 includes a first screw 221, a limiting rod 222 and a mounting block 223. The first screw 221 is vertically arranged and is rotatably connected to the filter plate 21 by a bearing connection. The limiting rod 222 is coaxially arranged with the first screw 221 and is fixedly connected to the scraper plate 361 by a screw. The mounting block 223 is provided with a lead screw nut and is threadedly connected to the screw through the lead screw nut. The mounting block 223 is sleeved on the limiting rod 222 and can slide along the limiting rod 222.

[0061] Reference Figure 2 , Figure 4 and Figure 5 The top of the first screw 221 is provided with a connector 224. The connector 224 is coaxially fixedly connected to the first screw 221 by welding. In this embodiment, the connector 224 can be a bolt with an internal hexagonal socket, which is used to connect with an electric wrench.

[0062] Reference Figure 4 , Figure 5 and Figure 6 The filter device 2 also includes two guide members 23, which are respectively installed on the top of the fixing groove 211 and the mounting block 223. Each guide member 23 includes a fixing ring 231 and a mounting ring 232. The fixing ring 231 is fixedly connected to the mounting block 223 and / or the filter plate 21. The mounting ring 232 is sleeved on the fixing ring 231 and rotatably connected to the fixing ring 231 via a bearing connection. The rotation axis of the mounting ring 232 is vertical. The end face of the mounting ring 232 has multiple positioning grooves 233, which are evenly distributed circumferentially along the axial direction of the mounting ring 232. The end of the fixing ring 231 is provided with a connecting groove 234. When the mounting ring 232 rotates along the fixing ring 231, the connecting groove 234 can sequentially communicate with the positioning grooves 233.

[0063] Reference Figure 4 , Figure 5 and Figure 6 The inner cavity of the connecting groove 234 is provided with a positioning piece 235. The part of the positioning piece 235 located in the connecting groove 234 is rotatably connected to the fixing ring 231 by means of a bearing connection, and the other end can extend into the connecting groove 234 to fix the angle between the fixing ring 231 and the mounting ring 232.

[0064] Reference Figure 4 , Figure 5 and Figure 6The side wall of the mounting ring 232 is provided with multiple sets of clamping plates 24. The multiple sets of clamping plates 24 are evenly distributed along the axial direction of the mounting ring 232. Each set of clamping plates 24 has two clamping plates, which are located on both sides of the axial direction of the mounting ring 232. The clamping plates 24 are fixedly connected to the mounting ring 232 by a torsion spring connection. The end faces of the clamping plates 24 that are close to each other are serrated, and the serrated structures of the two clamping plates 24 are alternately meshed.

[0065] Reference Figure 4 , Figure 5 and Figure 6 Friction pads 241 are provided on the end faces of the clamping plates 24 that are close to each other. The friction pads 241 are fixedly connected to the clamping plates 24 by screws, and a clamping gap 242 is formed between the two clamping plates 24.

[0066] Reference Figure 4 and Figure 7 The filter plate 21 has two locking grooves 212 on its surface. The locking grooves 212 are horizontally arranged and the long side of the locking grooves 212 is horizontal. The filter plate 21 has guide grooves on both sides of the locking grooves 212. The long side of the guide grooves is vertical. The two locking grooves 212 are arranged in sequence along the vertical direction. The inner cavity of each locking groove 212 is provided with an extension component 25.

[0067] Reference Figure 4 and Figure 7 The extension assembly 25 includes an abutment plate 251, a movable plate 252, an adjusting bolt 253, and a first spring 254. Both the abutment plate 251 and the movable plate 252 are horizontally arranged, with the long side of the abutment plate 251 parallel to the long side of the locking groove 212. The two ends of the abutment plate 251 and the movable plate 252 are located in guide grooves on both sides of the locking groove 212. The abutment plate 251 is located on the side of the movable plate 252 away from the through hole. The adjusting bolt 253 passes through the filter plate. 21, and threadedly connected to filter plate 21, the end of adjusting bolt 253 can abut against abutment plate 251, the first spring 254 is located on the side of movable plate 252 away from abutment plate 251, there are two first springs 254, the two first springs 254 are respectively located at both ends of the long side of movable plate 252, the extension and retraction direction of the first spring 254 is parallel to the long side of the guide groove, and the two ends of the first spring 254 are fixedly connected to movable plate 252 and filter plate 21 respectively.

[0068] Reference Figure 4 and Figure 7 The extension component 25 also includes a cam 255. There are two cams 255. The cams 255 are located on the side of the two first springs 254 that are far apart from each other. The cams 255 are rotatably connected to the filter plate 21 by means of a rotating shaft. The side wall of the cam 255 abuts against the side wall of the movable plate 252.

[0069] Reference Figure 4 and Figure 7 The end faces of the movable plate 252 and the abutment plate 251 that are close to each other are serrated and mesh with each other, and a positioning gap 256 is formed between the movable plate 252 and the abutment plate 251.

[0070] Reference Figure 2 The filter plate 21 has filter cloth 26 on both ends. The edges of the filter cloth 26 are located in the clamping gap 242 and the positioning gap 256, respectively. The filter cloth 26 has through holes, wherein the through holes and the through holes are coaxially arranged.

[0071] Reference Figure 3 The cleaning device 3 is installed in the inner cavity of the top cover plate 11.

[0072] Reference Figure 3 The cleaning device 3 includes a drive assembly 31, which includes a drive motor 311, a second screw 312, and a mounting bracket 313. In this embodiment, the drive motor 311 is preferably a servo motor. The bottom wall of the top cover plate 11 is provided with a limiting groove, and the inner cavity of the limiting groove is provided with a limiting block. The limiting block can slide along the limiting groove. The housing of the drive motor 311 is fixedly connected to the top cover plate 11 by screws. The second screw 312 is coaxially fixedly connected to the output shaft of the drive motor 311 by a coupling. The mounting bracket 313 is provided with a lead screw nut, and the mounting bracket 313 is threadedly connected to the second screw 312 by the lead screw nut. The mounting bracket 313 and the limiting block are fixedly connected.

[0073] Reference Figure 3 The cleaning device 3 also includes a first motor 32 and a hydraulic cylinder 33. The first motor 32 is preferably a tilting motor. The housing of the first motor 32 is fixedly connected to the mounting bracket 313. The housing of the hydraulic cylinder 33 is fixedly connected to the output end of the first motor 32 by screws.

[0074] Reference Figure 3 The cleaning device 3 also includes a cleaning assembly 34, which includes a fixed tube 341, a support rod 342, a gear 343, and a rack 344. The fixed tube 341 is fixedly connected to the output end of the hydraulic cylinder 33. The fixed tube 341 is horizontally arranged, and the axial direction of the fixed tube 341 is perpendicular to the long side of the top cover plate 11. The support rod 342 passes through the inner cavity of the fixed tube 341 and can rotate along the fixed tube 341. The gear 343 is fixedly connected to the support rod 342 by a key connection. The rack 344 is vertically arranged and is fixedly connected to the output end of the flipping motor.

[0075] Reference Figure 3The support rod 342 is provided with a plurality of striking elements 35 at intervals along the axial direction. The plurality of striking elements 35 are arranged at intervals along the axial direction of the support rod 342. The striking element 35 includes a second spring 351 and a striking block 352. The second spring 351 is fixedly connected to the support rod 342 by means of screws, and the striking block 352 is fixedly connected to the second spring 351 by means of screws. In this embodiment, the striking block 352 is preferably a rectangular block.

[0076] Reference Figure 3 and Figure 8 The cleaning device 3 also includes a scraping assembly 36, which includes a scraper plate 361. The scraper plate 361 is fixedly connected to the fixing tube 341 by screws. The bottom wall of the scraper plate 361 is provided with mounting holes. Multiple mounting holes are arranged at intervals along the long side of the scraper plate 361. The inner cavity of each mounting hole is provided with a third spring 362 and a crushing block 363. The extension and retraction direction of the third spring 362 is parallel to the axial direction of the mounting hole. In this embodiment, the crushing block 363 is preferably a conical block. The crushing block 363 is fixedly connected to the third spring 362.

[0077] Reference Figure 2 , Figure 3 and Figure 8 In this embodiment, the scraper 361 is attached to the filter cloth 26, and the end face of the scraper 361 attached to the filter cloth 26 is set in the shape of a blade.

[0078] The implementation principle of a sludge dewatering diaphragm plate and frame filter press according to an embodiment of this application is as follows: The operator first places the filter cloth 26 between two clamping plates 24, and then drives the first screw 221 to rotate through the connector 224, thereby driving the mounting block 223 to slide along the axial direction of the fixing groove 211 to unfold the filter cloth 26 once. After reaching the appropriate position, the mounting ring 232 is rotated and the connecting piece is placed in the corresponding positioning groove 233 and connecting groove 234 to complete the first fixing of the filter cloth 26.

[0079] Then, the cam 255 is rotated to make the abutment plate 251 and the movable plate 252 contact each other, completing the secondary unfolding of the filter cloth 26, fixing it completely from both ends of the filter cloth 26, and then fixing the filter cloth 26 to the filter plate 21.

[0080] The filter plate 21 is placed in the inner cavity of the machine body 1 in the placement tank 12, and then the corresponding pressure filtration operation is performed.

[0081] When the surface of the filter cloth 26 needs to be cleaned, the drive motor 311 drives the second screw 312 to rotate, which in turn drives the mounting bracket 313 to slide. The angle of the hydraulic cylinder 33 is adjusted by the first motor 32, and then the fixed tube 341 is driven to slide by the hydraulic cylinder 33. The support rod 342 drives the gear 343 to move. The gear 343 and rack 344 mesh, which in turn drives the support rod 342 to rotate along the fixed tube 341. Then, the impact block 352 completes the impact and cleaning of the filter cloth 26. Then, the filter cake is scraped by the filter plate 21. The setting of the crushing block 363 can better clean the filter cloth.

[0082] The above are all 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 sludge dewatering diaphragm plate and frame filter press, characterized in that: Includes a body (1), the inner cavity of which is provided with multiple filter devices (2), the multiple filter devices (2) being arranged sequentially along the long side of the body (1); The filter device (2) includes a filter plate (21) and a filter cloth (26). The end face of the filter plate (21) is provided with a fixing groove (211) on both sides in the vertical direction and a locking groove (212) on both ends in the vertical direction. The inner cavity of the fixing groove (211) is provided with at least two guides (23). The guide (23) includes a fixing ring (231) and a mounting ring (232). One fixing ring (231) is installed at the end of the fixing groove (211), and the other fixing ring (231) slides along the fixing groove (211). The mounting ring (232) rotates coaxially with the fixing ring (231). The side wall of the mounting ring (232) is provided with two clamping plates (24). The clamping plates (24) are elastically hinged to the mounting ring (232), and a clamping gap is formed between the two clamping plates (24). The locking groove (212) is provided with an extension component (25), the extension component (25) includes an abutment plate (251) and a movable plate (252), the abutment plate (251) is installed on the filter plate (21), the movable plate (252) is slidably connected to the filter plate (21), and a positioning gap (256) is formed between the abutment plate (251) and the movable plate (252); The holding gap and the positioning gap (256) are used to accommodate the filter cloth (26); The fixing ring (231) is provided with a connecting groove (234), and the mounting ring (232) is provided with a plurality of positioning grooves (233) evenly distributed. The connecting groove (234) can be connected to the positioning grooves (233) in sequence. The inner cavity of the connecting groove (234) is provided with a positioning piece (235), which is rotatably connected to the fixing ring (231), and the two ends of the positioning piece (235) are respectively located in the positioning groove (233) and the connecting groove (234).

2. The sludge dewatering diaphragm plate and frame filter press according to claim 1, characterized in that: The fixing groove (211) is provided with a guide assembly (22), the guide assembly (22) includes a first screw (221), a limiting rod (222) and a mounting block (223). The first screw (221) and the filter plate (21) are rotatably connected. The limiting rod (222) and the filter plate (21) are fixedly connected. The mounting block (223) is threadedly connected to the first screw (221) and slidably connected to the limiting rod (222). One of the fixing rings (231) is fixedly connected to the mounting block (223), and the other fixing ring (231) is fixedly connected to the filter plate (21).

3. The sludge dewatering diaphragm plate and frame filter press according to claim 1, characterized in that: The end faces of the clamping plates (24) that are close to each other are serrated and mesh with each other.

4. The sludge dewatering diaphragm plate and frame filter press according to claim 1, characterized in that: The extension assembly (25) further includes a first spring (254) and a cam (255). The two ends of the first spring (254) are fixedly connected to the movable plate (252) and the filter plate (21) respectively. The cam (255) is rotatably connected to the filter plate (21), and the sidewall of the cam (255) is attached to the movable plate (252).

5. A sludge dewatering diaphragm plate and frame filter press according to claim 4, characterized in that: The abutment plate (251) is equipped with an adjusting bolt (253), the axis of which is parallel to the axis of the first spring (254). The adjusting bolt (253) is threadedly connected to the filter plate (21) and rotatably connected to the abutment plate (251).

6. A sludge dewatering diaphragm plate and frame filter press according to claim 1, characterized in that: The top of the body (1) is provided with a top cover plate (11), and the top cover plate (11) is provided with a placement groove (12) for accommodating the filter plate (21); The top wall of the filter plate (21) is provided with a lifting lug.

7. A sludge dewatering diaphragm plate and frame filter press according to claim 6, characterized in that: The inner wall of the top cover plate (11) is provided with a cleaning device (3), the cleaning device (3) including: a drive assembly (31), a first motor (32) and a hydraulic cylinder (33). The drive assembly (31) is used to drive the first motor (32) to slide along the top cover plate (11), the first motor (32) is used to drive the hydraulic cylinder (33) to rotate along the top cover plate (11), and the output end of the hydraulic cylinder (33) is provided with a cleaning assembly (34). The cleaning assembly (34) includes a fixed tube ( 341), support rod (342), gear (343) and rack (344), the fixed tube (341) is fixedly connected to the output end of the hydraulic cylinder (33), the support rod (342) passes through the fixed tube (341) and is rotatably connected to the fixed tube (341), the gear (343) is rotatably connected to the support rod (342), the rack (344) is fixedly connected to the output end of the first motor (32), and the gear (343) and the rack (344) mesh; The support rod (342) is provided with multiple sets of striking elements (35) at intervals. Each striking element (35) includes a second spring (351) and a striking block (352). The two ends of the second spring (351) are fixedly connected to the support rod (342) and the striking block (352) respectively.

8. A sludge dewatering diaphragm plate and frame filter press according to claim 7, characterized in that: The cleaning device (3) further includes a scraping assembly (36), which includes a scraping plate (361) and a fixed tube (341). The scraping plate (361) is attached to the filter cloth (26). The bottom wall of the filter plate (21) is evenly distributed with multiple mounting holes, and each mounting hole is fitted with a broken block (363).

9. A sludge dewatering diaphragm plate and frame filter press according to claim 8, characterized in that: The crushed block (363) is equipped with a third spring (362), and the two ends of the third spring (362) are fixedly connected to the scraper (361) and the crushed block (363) respectively.

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