A filter press for sludge treatment

Abstract

The present invention discloses a filter press for sludge treatment, specifically relating to the technical field of sludge treatment devices, including a filter press chamber, a baffle, a filter plate, a diaphragm, a fixed pipe, a rectangular frame, a fixed arm, a clamping strip, and a filter cloth; a driving unit is provided on the fixed pipe, and the driving unit is used to drive the rectangular frame to swing up and down along the rotating fulcrum of the rectangular frame on the fixed pipe. By providing two clamping strips, the clamping strips clamp the two ends of the filter cloth. When the sewage flow in the fixed pipe is small, the driving unit is triggered to operate, and the driving unit drives the rectangular frame to rotate along the rotating fulcrum of the rectangular frame on the fixed pipe, thereby causing the two fixed arms to swing, that is, one fixed arm swings upward and the other fixed arm swings downward, so that the filter cloth can be driven to move in the strip-shaped through groove of the filter plate, and the side of the filter cloth that does not contact the mud moves to the mouth of the diaphragm mounting groove to separate the sludge, so that the filter cloth has a higher efficiency in treating and separating the sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment devices, and more particularly to a filter press for sludge treatment. Background Art

[0002] The filter press is a mechanical device that uses a special filter medium to apply a certain pressure to the object, causing the liquid to seep out. It is a commonly used solid-liquid separation equipment.

[0003] The filtering part of the filter press generally includes at least a filter plate, a filter cloth and a diaphragm. The filter cloth mainly serves the purpose of separating mud and water. When in use, the filter plate generates pressure on the sludge, and the mud in the sludge cannot pass through the filter cloth, while the sewage slurry passes through the filter cloth, and is further separated and filtered by the diaphragm. Since the filter cloth mainly separates the mud and sewage, the surface of the filter cloth is easily clogged with mud after a period of use, which makes it difficult for sewage to pass through the filter cloth, resulting in a decrease in the sludge treatment efficiency. Therefore, a filter press device or filter press is needed that can automatically clean the filter cloth after it is clogged with mud. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a filter press for sludge treatment. The technical problem to be solved by the present invention is that after a period of use, the filter cloth of the filter press in the prior art is easily clogged with mud, which makes it difficult for sewage to pass through the filter cloth, thereby reducing the sludge treatment efficiency.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A filter press for sludge treatment, comprising a filter press chamber mounted on a bracket, a baffle connected to the bottom of the filter press chamber, and further comprising:

[0007] A filter plate is engaged in the filter press chamber, the filter plate slides vertically and freely in the filter press chamber, a concave diaphragm mounting groove is opened on the lower surface of the filter plate, and a diaphragm is installed in the diaphragm mounting groove;

[0008] A fixed tube vertically fixed to the upper surface of the filter plate, wherein the interior of the fixed tube is in communication with the interior of the diaphragm mounting groove;

[0009] A rectangular frame rotatably connected to the periphery of the fixed tube, with fixed arms fixedly connected to both ends of the rectangular frame, and a clamping strip hingedly connected to one end of the fixed arm away from the rectangular frame, and a filter cloth is mounted on two of the clamping strips. The filter plate is provided with strip-shaped through-grooves for the free passage of the two ends of the filter cloth, and the two ends of the filter cloth are respectively passed through the two strip-shaped through-grooves and are respectively connected to the two clamping strips, and the surface of the filter cloth is in contact with the lower surface of the diaphragm;

[0010] A driving unit is provided on the fixed tube, and is used for driving the rectangular frame to swing up and down along a rotation fulcrum of the rectangular frame on the fixed tube.

[0011] Furthermore, a mud discharge port is provided in the middle of the baffle.

[0012] Furthermore, at least one hydraulic cylinder is vertically installed on the lower surface of the baffle, and a telescopic rod of the hydraulic cylinder penetrates the baffle and is drivingly connected to the filter plate.

[0013] Furthermore, a water inlet is provided on one side surface of the filter press bin.

[0014] Furthermore, the driving unit includes a hollow cylinder hinged to the upper end of the fixed tube, a telescopic rod is coaxially passed through the lower end of the hollow cylinder, the telescopic rod slides freely on the hollow cylinder, one end of the telescopic rod passing through the hollow cylinder is hinged to the upper side of the rectangular frame, the other end of the telescopic rod is coaxially fixed with a piston, the piston slides freely in the hollow cylinder, the outer wall of the fixed tube is provided with a first interface, the outer wall of the hollow cylinder is provided with a second interface, and the first interface and the second interface are connected by a pipeline.

[0015] Furthermore, a return spring is installed in the hollow cylinder. The return spring is wrapped around the telescopic rod, and its two ends in the elastic force direction are fixed to the piston and the inner bottom wall of the hollow cylinder in a one-to-one correspondence.

[0016] Furthermore, two beating units are provided on the upper surface of the filter plate, and the two beating units correspond to the two ends of the filter cloth respectively. The beating unit includes a mounting block connected to the upper surface of the filter plate, and a sliding rod is horizontally passed through the mounting block. The sliding rod slides freely on the mounting block, and a beating plate is connected to the end of the sliding rod away from the mounting block. The fixed arm is provided with a reciprocating mechanism for driving the sliding rod to move horizontally.

[0017] Furthermore, the reciprocating mechanism includes a rotating column vertically connected to the top of the filter plate, the end of the sliding rod is fixedly connected to a floating frame, the rotating column is located in the hollow part of the floating frame, the outer wall of the floating frame on the side away from the sliding rod is fixedly connected to a connecting rod, the flapping plate is connected to the end of the connecting rod, the rotating column is provided with a transverse movement component for driving the floating frame to reciprocate horizontally, and the fixed arm is provided with a rotating component for driving the rotating column to rotate.

[0018] Furthermore, the transverse movement assembly includes a fixed ring sleeved on the rotating column, a protrusion is fixed to the periphery of the fixed ring, the protrusion is in contact with the inner wall of the floating frame, a driving spring is wrapped around the sliding rod, and the two ends of the driving spring in the direction of elastic force elastically press against the floating frame and the mounting block respectively.

[0019] Furthermore, the rotating assembly includes a floating rod coaxially arranged on the rotating column, a sliding pin is fixed to the upper end of the floating rod, the fixed arm is provided with a waist-shaped hole for the sliding pin to be inserted, the sliding pin slides freely in the waist-shaped hole, the rotating column is coaxially provided with a sliding hole for the floating rod to pass freely, a ball is rotatably embedded in the lower end of the floating rod, the inner wall of the sliding hole is provided with a spiral rolling groove for the ball to engage, and the ball rolls freely in the spiral rolling groove.

[0020] The technical effects and advantages of the present invention are as follows:

[0021] 1. By setting two clamping strips, the clamping strips clamp the two ends of the filter cloth to connect. When the sewage flow in the fixed pipe is small, the driving unit is triggered to drive the rectangular frame to rotate along the rotating fulcrum of the rectangular frame on the fixed pipe, thereby causing the two fixed arms to swing, that is, one fixed arm swings upward and the other fixed arm swings downward, so that the filter cloth can be driven to move in the strip-shaped groove of the filter plate. On the one hand, the mud on the surface of the filter cloth can be scraped off by the edge of the strip-shaped groove in the process of passing through the strip-shaped groove. On the other hand, the side of the filter cloth that is not in contact with the mud moves to the mouth of the diaphragm mounting groove to separate the sludge. In this way, the filter cloth has a higher efficiency in treating and separating the sludge.

[0022] 2. By setting up a beating plate, when the rectangular frame swings up and down, it will trigger the sliding rod to move back and forth horizontally, thereby causing the beating plate to move back and forth horizontally and produce a beating and knocking effect on the surface of the filter cloth, so that the mud on the surface of the filter cloth can be beaten off before it dries. On the other hand, the beating can also beat off the mud on the surface of the mud that has not been scraped off by the edge of the strip-shaped notch, thereby avoiding affecting the permeability of the filter cloth;

[0023] 3. By arranging a floating rod, a rotating column, a ball and a spiral rolling groove, when the rectangular frame swings up and down, the floating rod will slide in the sliding hole of the rotating column. During sliding, the ball will roll in the spiral rolling groove, thereby driving the rotating column to rotate. When the rotating column rotates, it drives the protrusion to rotate around the axial direction of the rotating column, so that the protrusion can intermittently abut the inner wall of the floating frame, thereby driving the floating frame to move horizontally. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a filter press for sludge treatment in the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the structure from an upward viewing angle;

[0026] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0028] Figure 5 This is a schematic diagram of the structure of the filter plate, filter cloth and fixed tube after assembly in the present invention;

[0029] Figure 6 for Figure 5 Schematic diagram of the side view structure;

[0030] Figure 7 for Figure 6 A magnified schematic diagram of the local structure at point B in the middle;

[0031] Figure 8 for Figure 5 Another angle structural diagram;

[0032] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure;

[0033] Figure 10 for Figure 9 Enlarged schematic diagram of the local structure at point C in the middle.

[0034] The accompanying drawings are marked as follows: 1. hydraulic cylinder; 2. water inlet; 3. baffle; 4. filter press; 5. fixed pipe; 6. connecting pipe; 7. hollow cylinder; 8. mud discharge port; 9. membrane hole; 10. rectangular frame; 11. floating rod; 12. rotating column; 13. clamping bar; 14. fixed arm; 15. piston; 16. reset spring; 17. second interface; 18. telescopic rod; 19. first interface; 20. filter plate; 21. bearing; 22. filter cloth; 23. mounting block; 24. sliding rod; 25. driving spring; 26. bump; 27. floating frame; 28. connecting rod; 29. ​​flapping plate; 30. sliding pin; 31. waist-shaped hole; 32. diaphragm; 33. ball; 34. spiral rolling groove. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] like Figures 1-10As shown, this embodiment discloses: a filter press for sludge treatment, including a filter press chamber 4, three legs are welded to the bottom of the filter press chamber 4, and a bottom plate is welded to the bottom of the three legs. The bottom plate and the legs constitute a bracket, so that the filter press chamber 4 is installed on a horizontal placement surface through the bracket, the bottom of the filter press chamber 4 is open and is connected to a baffle 3 by bolts, the baffle 3 closes the bottom opening of the filter press chamber 4, a mud discharge port 8 is provided in the middle of the baffle 3, the mouth of the mud discharge port 8 is detachably connected to a baffle cover, the baffle cover is used to close the mouth of the mud discharge port 8, a filter plate 20 is clamped inside the filter press chamber 4, the filter plate 20 can slide freely up and down in the filter press chamber 4, and a recessed diaphragm installation is provided on the lower surface of the filter plate 20 Groove, a diaphragm 32 is installed in the diaphragm mounting groove, and a plurality of membrane holes 9 are opened on the surface of the diaphragm 32. The membrane holes 9 can allow liquid to pass through but solids cannot pass through. In addition, a fixed pipe 5 is vertically welded to the top of the filter plate 20, and the interior of the fixed pipe 5 is connected to the interior of the diaphragm mounting groove. Two hydraulic cylinders 1 are vertically installed on the lower surface of the baffle 3. The telescopic rod of the hydraulic cylinder 1 penetrates the baffle 3 and is driven and connected to the filter plate 20. A water inlet 2 is provided on the surface of one side of the filter press bin 4. The water inlet 2 is connected to an external sludge pump through a pipeline. The sludge pump transports muddy water to the water inlet 2, and then transports it to the filter press bin 4 through the water inlet 2. The filter plate 20 is located above the liquid level of the muddy water in the filter press bin 4. In addition, a control valve is installed on the water inlet 2;

[0037] The fixed tube 5 is rotatably connected to the rectangular frame 10 at its periphery, and the fixed tube 5 penetrates into the hollowed-out part in the middle of the rectangular frame 10. A fixed arm 14 is fixedly connected to each end of the rectangular frame 10. The fixed arm 14 is hinged with a clamping strip 13 at one end away from the rectangular frame 10. The two clamping strips 13 are jointly installed with the filter cloth 22. The filter plate 20 is provided with a strip-shaped through-groove for the free passage of the two ends of the filter cloth 22. The two ends of the filter cloth 22 are respectively penetrated by two strip-shaped through-grooves and are respectively connected to the two clamping strips 13. The surface of the filter cloth 22 is in contact with the lower surface of the diaphragm 32. When performing sludge treatment, the water inlet 2 is first closed, and then the hydraulic cylinder 1 is started. The telescopic rod of the hydraulic cylinder 1 is shortened and drives the filter plate 2 0 moves downward. When moving downward, the filter plate 20 drives the filter cloth 22 and the diaphragm 32 to move downward. When moving downward, the filter cloth 22 begins to squeeze the sludge. The mud in the sludge cannot pass through the filter cloth 22, but the muddy water can pass through the filter cloth 22. The membrane holes 9 on the diaphragm 32 further separate and filter the muddy water. In this process, mud will adhere to both surfaces of the filter cloth 22, and the sewage will enter the fixed pipe 5 through the membrane holes 9. In the early stage of filtration, the amount of mud adhered to the surface of the filter cloth 22 and the diaphragm 32 is small, so the water permeability of the filter cloth 22 and the diaphragm 32 is better at this time, thereby making the flow rate of sewage entering the fixed pipe 5 larger in the early stage of filtration.

[0038] The upper end of the fixed pipe 5 is hinged with a hollow cylinder 7, and the upper end of the fixed pipe 5 is equipped with a connecting pipe 6, which is connected to the external collection pipeline. A telescopic rod 18 is coaxially passed through the lower end of the hollow cylinder 7, and the telescopic rod 18 slides freely on the hollow cylinder 7. One end of the telescopic rod 18 passing through the hollow cylinder 7 is hinged to the upper side of the rectangular frame 10, and the other end of the telescopic rod 18 is coaxially fixed with a piston 15, which slides freely in the hollow cylinder 7. A first interface 19 is provided on the outer wall of the fixed pipe 5, and a second interface 17 is provided on the outer wall of the hollow cylinder 7. The first interface 19 is connected to the second interface 17 through a pipeline. A reset spring 16 is installed in the hollow cylinder 7, and the reset spring 16 is wrapped around the telescopic rod 18, and its two ends in the direction of elastic force are respectively fixed to the piston 15 and the inner bottom wall of the hollow cylinder 7 in a one-to-one correspondence. When the sewage flow in the fixed pipe 5 is large, the sewage cannot flow quickly from the connecting pipe 6 When the sewage enters the collection pipeline, part of the sewage will enter the second interface 17 from the first interface 19, and then enter the hollow cylinder 7 from the second interface 17, and generate an upward thrust on the piston 15, causing the piston 15 to move upward in the hollow cylinder 7, thereby making the return spring 16 in an extended state and accumulating elastic potential energy. When the sewage flow in the fixed pipe 5 decreases, the buoyancy of the sewage on the piston 15 decreases, and the elastic potential energy of the return spring 16 is released and drives the piston 15 to move downward, causing the piston 15 to drive the telescopic rod 18 to move downward. When the telescopic rod 18 moves downward, it will drive the rectangular frame 10 to swing downward, thereby causing the two fixed arms 14 to swing upward and downward respectively, so that the two clamping strips 13 can pull the filter cloth 22 to move. When the filter cloth 22 moves, the edge of the mouth of the strip groove will scrape the mud on both surfaces of the filter cloth 22;

[0039] Two mounting blocks 23 are connected to the upper surface of the filter plate 20, and the two mounting blocks 23 correspond to the two ends of the filter cloth 22 respectively. A sliding rod 24 is horizontally penetrated on the mounting block 23, and the sliding rod 24 slides freely on the mounting block 23. The end of the sliding rod 24 away from the mounting block 23 is connected to a flapping plate 29. The top of the filter plate 20 is vertically rotated and connected to the rotating column 12 through the mounting bearing 9. The end of the sliding rod 24 is fixedly connected to the floating frame 27. The rotating column 12 is located in the hollow part of the floating frame 27. The outer wall of the side of the floating frame 27 away from the sliding rod 24 is fixedly connected to the connecting rod 28. The flapping plate 29 is connected to the end of the connecting rod 28. A fixing ring is sleeved on the rotating column 12, and a protrusion 26 is fixed to the periphery of the fixing ring. The protrusion 26 and the floating frame The inner wall of 27 is in contact with each other, and a driving spring 25 is wrapped around the sliding rod 24. The two ends of the driving spring 25 in the elastic direction elastically press against the floating frame 27 and the mounting block 23 respectively. A floating rod 11 is coaxially passed through the rotating column 12, and a sliding pin 30 is fixed to the upper end of the floating rod 11. The fixed arm 14 is provided with a waist-shaped hole 31 for the sliding pin 30 to be inserted. The sliding pin 30 slides freely in the waist-shaped hole 31. The rotating column 12 is coaxially provided with a sliding hole for the floating rod 11 to pass freely. A ball 33 is rotatably embedded at the lower end of the floating rod 11, and a spiral rolling groove 34 is provided on the inner wall of the sliding hole for the ball 33 to engage. The ball 33 rolls freely in the spiral rolling groove 34, thereby enabling the rotating column 12 to rotate.

[0040] The working principle of the present invention is as follows: the sludge pump is started, and the sludge pump transports the muddy water to the water inlet 2, and then transports it to the filter press 4 from the water inlet 2. The filter plate 20 is located above the liquid level of the muddy water in the filter press 4. Then the control valve on the water inlet 2 is closed, so that the water inlet 2 is in a closed state. Then the hydraulic cylinder 1 is started, and the telescopic rod of the hydraulic cylinder 1 is shortened, and the filter plate 20 is driven to move downward. When moving downward, the filter plate 20 drives the filter cloth 22 and the diaphragm 32 to move downward. When moving downward, the filter cloth 22 begins to press the sludge. Squeeze occurs, and the mud in the sludge cannot pass through the filter cloth 22, while the muddy water can pass through the filter cloth 22. The membrane holes 9 on the diaphragm 32 further separate and filter the muddy water. In this process, mud will adhere to both surfaces of the filter cloth 22, and the sewage will enter the fixed pipe 5 through the membrane holes 9. In the early stage of filtration, the amount of mud attached to the surface of the filter cloth 22 and the diaphragm 32 is small, so the water permeability of the filter cloth 22 and the diaphragm 32 is better at this time, thereby making the flow rate of sewage entering the fixed pipe 5 larger in the early stage of filtration.

[0041] When the sewage flow in the fixed pipe 5 is large, the sewage cannot flow quickly into the collection pipe from the connecting pipe 6. At this time, some sewage will enter the second interface 17 from the first interface 19, and then enter the hollow cylinder 7 from the second interface 17, and generate an upward thrust on the piston 15, causing the piston 15 to move upward in the hollow cylinder 7, thereby causing the return spring 16 to be in an extended state and accumulate elastic potential energy. When the sewage flow in the fixed pipe 5 decreases, the buoyancy of the sewage on the piston 15 is reduced, and the elastic potential energy of the return spring 16 is released and drives the piston 15 to move downward, causing the piston 15 to drive the telescopic rod 18 to move downward. When the telescopic rod 18 moves downward, it will drive the rectangular frame 10 to swing downward, thereby causing the two fixed arms 14 to swing upward and downward respectively, so that the two clamping strips 13 can pull the filter cloth 22 to move. When the filter cloth 22 moves, the edge of the mouth of the strip groove will scrape the mud on both surfaces of the filter cloth 22;

[0042] When the rectangular frame 10 swings downward, the sliding pin 30 on the floating rod 11 slides in the waist-shaped hole 31 of the fixed arm 14, and at the same time, the floating rod 11 slides in the sliding hole of the rotating column 12. During the sliding, the ball 33 rolls in the spiral rolling groove 34. During the rolling process, since the floating rod 11 cannot rotate, the rotating column 12 rotates on the filter plate 20. During the rotation process, the fixed ring is driven to rotate. When the fixed ring rotates, the protrusion 26 will contact the inner wall of the side of the floating frame 27 away from the end of the filter cloth 22, and generate a thrust on the floating frame 27, causing the floating frame 27 to move toward the fixed pipe 5. The floating frame 27 compresses the driving spring 25, which is compressed and accumulates elastic potential energy. When the protrusion 26 is out of contact with the surface of the floating frame 27, the elastic potential energy accumulated in the driving spring 25 is released, thereby driving the floating frame 27 to move in the opposite direction, so that the floating frame 27 drives the slapping plate 29 to move rapidly toward the end of the filter cloth 22, so that the slapping plate 29 has a slapping effect on the surface of the filter cloth 22, thereby quickly slapping the mud on the surface of the filter cloth 22, preventing the mud from drying out after dehydration and affecting the permeability of the filter cloth 22. In addition, the mud and water on the surface of the filter cloth 22 can also be slapped off.

[0043] When the sludge is filtered to a certain extent, the telescopic rod of the hydraulic cylinder 1 extends to drive the filter plate 20 to move upward and reset, and then the cover of the mud discharge port 8 is opened, so that the sludge can fall from the mud discharge port 8 for collection.

[0044] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0045] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0046] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A filter press for sludge treatment, comprising a filter press chamber (4) mounted on a bracket, wherein a baffle (3) is connected to the bottom of the filter press chamber (4), characterized in that: Also includes: A filter plate (20) is engaged in the filter press bin (4), the filter plate (20) slides vertically and freely in the filter press bin (4), a concave diaphragm mounting groove is provided on the lower surface of the filter plate (20), and a diaphragm (32) is mounted in the diaphragm mounting groove; a fixed tube (5) vertically fixed to the upper surface of the filter plate (20), the interior of the fixed tube (5) being in communication with the interior of the diaphragm mounting groove; A rectangular frame (10) is rotatably connected to the periphery of the fixed tube (5), and a fixed arm (14) is fixedly connected to each end of the rectangular frame (10), and a clamping strip (13) is hingedly connected to one end of the fixed arm (14) away from the rectangular frame (10), and a filter cloth (22) is installed on the two clamping strips (13). The filter plate (20) is provided with a strip-shaped through-groove for the two ends of the filter cloth (22) to pass freely, and the two ends of the filter cloth (22) are respectively passed through the two strip-shaped through-grooves and are respectively connected to the two clamping strips (13), and the surface of the filter cloth (22) is in contact with the lower surface of the diaphragm (32); A driving unit is provided on the fixed tube (5), and the driving unit is used to drive the rectangular frame (10) to swing up and down along the rotation fulcrum of the rectangular frame (10) on the fixed tube (5). The driving unit includes a hollow cylinder (7) hinged to the upper end of the fixed tube (5), and a telescopic rod (18) is coaxially passed through the lower end of the hollow cylinder (7). The telescopic rod (18) slides freely on the hollow cylinder (7), and one end of the telescopic rod (18) passing through the hollow cylinder (7) is hinged to the upper side of the rectangular frame (10), and the other end of the telescopic rod (18) is hinged to the upper side of the rectangular frame (10). A piston (15) is coaxially fixed to the end thereof, and the piston (15) slides freely in the hollow cylinder (7). The outer wall of the fixed tube (5) is provided with a first interface (19), and the outer wall of the hollow cylinder (7) is provided with a second interface (17). The first interface (19) and the second interface (17) are connected through a pipeline. A reset spring (16) is installed in the hollow cylinder (7), and the reset spring (16) is wrapped around the telescopic rod (18), and the two ends of the reset spring (16) in the elastic direction are fixed to the piston (15) and the inner bottom wall of the hollow cylinder (7) in a one-to-one correspondence.

2. The filter press for sludge treatment according to claim 1, characterized in that: A mud discharge port (8) is provided in the middle of the baffle (3).

3. The filter press for sludge treatment according to claim 2, characterized in that: At least one hydraulic cylinder (1) is vertically mounted on the lower surface of the baffle (3), and a telescopic rod of the hydraulic cylinder (1) penetrates the baffle (3) and is drivingly connected to the filter plate (20).

4. The filter press for sludge treatment according to claim 3, characterized in that: A water inlet (2) is provided on one side surface of the filter press bin (4).

5. The filter press for sludge treatment according to claim 4, characterized in that: Two beating units are provided on the upper surface of the filter plate (20), and the two beating units correspond to the two ends of the filter cloth (22) respectively. The beating units include a mounting block (23) connected to the upper surface of the filter plate (20), a sliding rod (24) is horizontally passed through the mounting block (23), and the sliding rod (24) slides freely on the mounting block (23). The end of the sliding rod (24) away from the mounting block (23) is connected to a beating plate (29), and the fixed arm (14) is provided with a reciprocating movement mechanism for driving the sliding rod (24) to move horizontally.

6. The filter press for sludge treatment according to claim 5, characterized in that: The reciprocating mechanism includes a rotating column (12) vertically rotatably connected to the top of the filter plate (20), a floating frame (27) is fixedly connected to the end of the sliding rod (24), the rotating column (12) is located in the hollow portion of the floating frame (27), a connecting rod (28) is fixedly connected to the outer wall of the floating frame (27) away from the sliding rod (24), the flapping plate (29) is connected to the end of the connecting rod (28), a transverse movement component for driving the floating frame (27) to move horizontally back and forth is provided on the rotating column (12), and a rotating component for driving the rotating column (12) to rotate is provided on the fixed arm (14).

7. The filter press for sludge treatment according to claim 6, characterized in that: The transverse movement assembly includes a fixed ring sleeved on the rotating column (12), a protrusion (26) is fixed to the periphery of the fixed ring, and the protrusion (26) is in contact with the inner wall of the floating frame (27). A driving spring (25) is sleeved on the sliding rod (24), and the two ends of the driving spring (25) in the elastic direction elastically press against the floating frame (27) and the mounting block (23) respectively.

8. The filter press for sludge treatment according to claim 7, characterized in that: The rotating assembly includes a floating rod (11) coaxially arranged on the rotating column (12), a sliding pin (30) is fixed to the upper end of the floating rod (11), the fixed arm (14) is provided with a waist-shaped hole (31) for the sliding pin (30) to be inserted, and the sliding pin (30) slides freely in the waist-shaped hole (31), the rotating column (12) is coaxially provided with a sliding hole for the floating rod (11) to pass freely, and a ball (33) is rotatably embedded in the lower end of the floating rod (11), and the inner wall of the sliding hole is provided with a spiral rolling groove (34) for the ball (33) to be engaged, and the ball (33) rolls freely in the spiral rolling groove (34).

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