A filter press for treating mine sludge

Abstract

The present application relates to a filter press for treating mining sludge, comprising a frame, a filter plate and a plate-pulling trolley are horizontally slidably connected to the frame, and a water inlet pipe, a water outlet pipe, an extrusion plate and a hydraulic cylinder are arranged on the frame, a clamping block is slidably connected to the plate-pulling trolley, a clamping groove is provided on the clamping block, two adjacent filter plates can be clamped and locked and the filter plates can be driven to slide, a cleaning mechanism is arranged on the plate-pulling trolley, and the cleaning mechanism is located between the two clamping blocks, and when the plate-pulling trolley clamps and locks the filter plate, the cleaning mechanism cleans the side of the filter plate close to the cleaning mechanism to realize the cleaning function, and the cleaning mechanism is integrated on the plate-pulling trolley. The present application has the effect of reducing the complexity of the filter press while retaining the cleaning function.

Description

Technical Field

[0001] The present application relates to the field of mining sludge treatment technology and equipment, and in particular to a filter press for mining sludge treatment. Background Art

[0002] During mining, sewage with high sediment content is produced. Filter presses are usually used to filter the sludge in sewage. Filter presses separate solids and liquids in mixed liquids by applying pressure. Its basic structure includes a frame, a pressing mechanism and a filtering mechanism, in which the filtering mechanism consists of a filter plate, a filter frame and a filter cloth. When working, the filter cloth is installed on the filter plate, and multiple filter plates and filter frames are arranged alternately and compressed by hydraulic or mechanical means to form multiple filter chambers. Under the action of pressure, the liquid passes through the filter cloth and the solids are trapped on the filter cloth, thereby achieving solid-liquid separation. In order to ensure the filtering effect, the filter cloth needs to be cleaned regularly.

[0003] Related technology can refer to the Chinese patent with announcement number CN114797199B, which discloses a chamber-type fully automatic water-washing filter press, including a filter press body and a plurality of filter plates arranged on the filter press body. Both sides of the filter press body are provided with a plate pulling trolley that can reciprocate and move laterally along the length direction of the filter press body. The plate pulling trolley cooperates with the filter plate. A cleaning mechanism for cleaning the filter plate is provided on the upper side of the filter press body, which is convenient for cleaning stains attached to the surface of the filter plate and improves the cleaning quality and speed.

[0004] With regard to the above-mentioned related technologies, a plate pulling trolley is slidably connected to the filter press body for sliding the filter plate. In order to facilitate the cleaning of the filter plate, a cleaning mechanism is added to the filter press body. The cleaning mechanism includes a pulley and structures such as a rack, a beam and a fixed plate used in conjunction with it. Two sets of sliding devices, namely the plate pulling trolley and the pulley, are provided on the filter press body. The overall structure of the filter press is too complicated, which is not conducive to the cost control of the filter press. Summary of the invention

[0005] In order to reduce the complexity of the filter press while achieving an automatic cleaning function, the present application provides a filter press for treating mine sludge.

[0006] The present application provides a filter press for treating mining sludge, which adopts the following technical solution:

[0007] A filter press for treating mine sludge comprises a frame, a filter plate is horizontally slidably connected to the frame, an inlet pipe for supplying sewage and an outlet pipe for discharging filtered clean water are provided on the frame, an extrusion plate for extruding the filter plate and a hydraulic cylinder for driving the extrusion plate to move are provided on the frame, a plate pulling trolley is horizontally slidably connected to the frame, a clamping block is slidably connected to the plate pulling trolley, a clamping groove matched with the filter plate is provided on the clamping block, the sliding direction of the clamping block is perpendicular to the sliding direction of the filter plate, two clamping blocks are distributed along the sliding direction of the filter plate, a cleaning mechanism for cleaning the filter plate is provided on the plate pulling trolley, and the cleaning mechanism is located between the two clamping blocks.

[0008] By adopting the above technical solution, two group clamping blocks are arranged on the plate pulling trolley along the sliding direction of the filter plate, which can lock two adjacent filter plates and drive the filter plates to slide. At the same time, a cleaning mechanism is arranged on the plate pulling trolley, and the cleaning mechanism moves with the plate pulling trolley. When the plate pulling trolley locks the filter plate, the cleaning mechanism cleans the side of the filter plate close to the cleaning mechanism to achieve the cleaning function. The cleaning mechanism is integrated into the plate pulling trolley, and the structures such as the rack, beam body and fixed plate are reduced while retaining the cleaning function, thereby reducing the complexity of the filter press while realizing the automatic cleaning function.

[0009] Optionally, the cleaning mechanism includes a cleaning bracket, which is fixedly connected to the plate pulling trolley, and a cross frame is vertically slidably connected to the cleaning bracket, and the cross frame is provided with a cleaning brush for cleaning the filter plate and a nozzle for spraying water on the filter plate, the plate pulling trolley is provided with a water supply pipe for supplying water to the nozzle, and the frame is provided with a water tank for supplying water to the water supply pipe, and the water supply pipe is arranged in the water tank away from the nozzle.

[0010] By adopting the above technical solution, the cleaning mechanism of the existing filter press usually uses a longer hose to directly supply water. The hose moves continuously with the movement of the cleaning mechanism, and the shape of the hose changes continuously. Long-term use will affect the service life of the hose, and it needs to be replaced regularly, increasing the operating cost of the filter press. The present application supplies water to the nozzle through a fixed water supply pipe of a water tank. The length direction of the water tank is parallel to the sliding direction of the filter plate, and the length of the water tank covers the entire moving path of the water supply pipe. The water supply pipe draws water from the water tank throughout the whole process, and the staff adds water to the water tank, which avoids the continuous deformation of the pipe with the movement of the cleaning mechanism, helps to increase the service life of the water supply pipe and reduce the operating cost.

[0011] Optionally, the water tank is provided with a water intake trough for the water supply pipe to enter, and the water intake trough is located on the side wall of the water tank away from the crossbeam.

[0012] By adopting the above technical solution, when cleaning the filter plate, some sludge will be splashed into the air. If the sludge enters the water tank, it will pollute the cleaning water and affect the cleaning effect of the filter plate. In this application, the side wall of the water tank away from the crossbeam is opened, and the water supply pipe enters the water tank through the water intake trough to take water, which can effectively prevent the splashed mud from entering the water tank and ensure the cleaning effect.

[0013] Optionally, a filter screen is provided at one end of the water supply pipe close to the water tank to prevent mud and sand from entering the water supply pipe.

[0014] By adopting the above technical solution, some sludge will be splashed into the air when cleaning the filter plate and enter the water tank through the drain. If the mud is sucked into the water supply pipe, it will affect the cleaning quality of the filter plate. A filter screen is set at the end of the water supply pipe to prevent mud from entering, which helps to ensure the cleaning effect.

[0015] Optionally, a sealing plate for controlling the opening and closing of a water inlet pipe is slidably connected to the frame, and the sliding direction of the sealing plate is perpendicular to the length direction of the water inlet pipe. A transmission pipe is fixedly connected to the frame, and a transmission fluid is arranged in the transmission pipe. A first piston and a second piston for sealing the transmission fluid are slidably connected to the two ends of the transmission pipe, respectively. A first transmission rod is fixedly connected between the extrusion plate and the first piston, and a second transmission rod is fixedly connected between the sealing plate and the second piston. When the extrusion plate squeezes the filter plate, before the pressure between adjacent filter plates reaches the filtering standard pressure, the sealing plate is located in a position to close the water inlet pipe. When the pressure between adjacent filter plates reaches the filtering standard pressure and continues to increase, the sealing plate moves in the direction of increasing the passing capacity of the water inlet pipe.

[0016] By adopting the above technical solution, before filtering, it is necessary to start the hydraulic cylinder to drive the squeezing plate to approach the filter plate. After the squeezing plate contacts the filter plate, it continues to move until all the filter plates are tightly squeezed and the pressure between the squeezing plate and the filter plate reaches the filtration standard pressure. A blocking plate is set, and before the filter plate is pressed by the squeezing plate, the water inlet pipe is in a closed state, which can prevent sewage from passing through the water inlet pipe before the filter plate is pressed.

[0017] Optionally, the transmission pipe is provided with a regulating port for regulating the volume of transmission fluid in the transmission pipe.

[0018] By adopting the above technical solution, the regulating port can realize the adjustment of the transmission fluid volume in the transmission pipe, so that when the number of filter plates changes, it can be matched more timely, thereby expanding the scope of application.

[0019] Optionally, an adjusting tube connected to the adjusting port is connected to the side wall of the transmission tube, an adjusting piston is slidably connected in the adjusting tube, the adjusting piston seals the end face of the adjusting tube, and an adjusting threaded rod is rotatably connected to the adjusting tube to drive the adjusting piston to slide.

[0020] By adopting the above technical solution, rotating the threaded rod can drive the sliding of the regulating piston, thereby controlling the ratio of the transmission fluid in the regulating tube and the transmission tube, thereby realizing rapid adjustment of the transmission fluid volume in the transmission tube.

[0021] Optionally, a sealing groove is provided on the filter plate, which is connected end to end and opened at the edge of the side of the filter plate. A hollow sealing strip is provided in the sealing groove. A pressurizing groove is provided on the surface of the filter plate. A transmission piston slidingly connected to the filter plate is provided in the pressurizing groove. The transmission piston seals the end face of the pressurizing groove, and an air flow channel is connected between the sealing strip and the bottom wall of the pressurizing groove.

[0022] By adopting the above technical solution, the filter plates are in contact with each other, and the extrusion plate squeezes the filter plates under the drive of the hydraulic cylinder, thereby achieving sealing between adjacent filter plates. When adjacent filter plates are close to each other, they will squeeze and drive the piston to slide toward the bottom of the pressurized groove, compressing the air into the sealing strip, causing the sealing strip to expand, thereby increasing the sealing performance between adjacent filter plates.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The two group clamping blocks on the plate pulling trolley can lock two adjacent filter plates. In this application, the cleaning mechanism is arranged on the plate pulling trolley, and the cleaning mechanism moves with the plate pulling trolley, which realizes the automatic cleaning function and reduces the complexity of the filter press;

[0025] 2. Before filtration, the hydraulic cylinder drives the extrusion plate toward the filter plate until all the filter plates are tightly squeezed and the pressure between the extrusion plate and the filter plate reaches the standard filtration pressure. The sealing plate keeps the water inlet pipe in a closed state before the filter plate is pressed by the extrusion plate, which can prevent sewage from passing through the water inlet pipe before the filter plate is pressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0028] Figure 3 It is a structural schematic diagram used to display the water supply pipeline in the embodiment of the present application.

[0029] Figure 4 It is a schematic diagram for showing the internal structure of the transmission tube in the embodiment of the present application.

[0030] Figure 5 yes Figure 4 Schematic diagram of the enlarged portion B.

[0031] Figure 6It is a schematic diagram of the structure used to display the filter plate in the embodiment of the present application.

[0032] Figure 7 It is a schematic diagram for showing the internal structure of the sealing strip in the embodiment of the present application.

[0033] Explanation of the reference numerals: 1. frame; 11. extrusion plate; 12. hydraulic cylinder; 13. water tank; 131. water intake trough; 14. blocking plate; 2. filter plate; 21. sealing groove; 22. sealing strip; 23. pressurizing groove; 231. transmission piston; 24. ventilation channel; 3. water inlet pipe; 4. water outlet pipe; 5. plate pulling trolley; 51. clamping block; 511. clamping groove; 52. cleaning mechanism; 521. cleaning bracket; 522. cross frame; 523. water supply pipe; 524. filter screen; 525. cleaning brush; 526. nozzle; 6. transmission pipe; 61. first piston; 62. second piston; 63. first transmission rod; 64. second transmission rod; 65. adjusting pipe; 651. adjusting piston; 652. adjusting threaded rod. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0035] The embodiment of the present application discloses a filter press for treating mine sludge.

[0036] Reference Figure 1 and Figure 2 A filter press for treating mining sludge includes a frame 1, which plays a supporting role. The frame 1 is equipped with an inlet pipe 3 and an outlet pipe 4. The inlet pipe 3 is used to supply sewage to the filter press. After the filtration is completed, the clean water produced is discharged through the outlet pipe 4. A horizontal crossbeam is arranged on the frame 1, and a filter plate 2 is horizontally connected to the crossbeam. Filter cloths are installed on both sides of the filter plate 2 for filtering out sludge. A hydraulic cylinder 12 is installed on the frame 1, and the telescopic rod of the hydraulic cylinder 12 is horizontally arranged and fixedly connected with an extrusion plate 11, and the extrusion plate 11 is used to squeeze the filter plate 2. A pull plate trolley 5 is horizontally slidably connected to the crossbeam, and two sets of clamping blocks 51 for clamping and locking the filter plate 2 are arranged on the pull plate trolley 5, and a cleaning mechanism 52 is arranged between the two clamping blocks 51. The clamping block 51 can clamp and lock two adjacent filter plates 2 and drive the filter plates 2 to slide. The cleaning mechanism 52 can move with the pull plate trolley 5, and can clean the filter plate 2 fixed by the clamping block 51. Under the premise of retaining the cleaning function, the structures such as the rack, beam and fixed plate of the cleaning mechanism are reduced, which helps to reduce the complexity of the filter press while realizing the automatic cleaning function.

[0037] Reference Figure 2The clamping block 51 is horizontally slidably connected to the plate pulling trolley 5, and the sliding direction of the clamping block 51 is perpendicular to the sliding direction of the filter plate 2. The plate pulling trolley 5 is provided with a locking cylinder for driving the clamping block 51 to slide. The clamping block 51 is provided with a clamping groove 511, and the shape and size of the clamping groove 511 match the wing plates on both sides of the filter plate 2. The clamping block 51 can be driven to slide by the locking cylinder, thereby realizing the switching of the locking and release states between the clamping block 51 and the filter plate 2. The two clamping blocks 51 on the same plate pulling trolley 5 are distributed along the sliding direction of the filter plate 2, and the two adjacent filter plates 2 can be fixed to the two sides of the cleaning mechanism 52 at the same time, so that the two filter plates 2 can be cleaned at the same time, which helps to improve the cleaning effect.

[0038] Reference Figure 1 and Figure 2 The cleaning mechanism 52 includes a cleaning bracket 521. The cleaning bracket 521 is in the shape of a hollow frame and is vertically mounted on the upper surface of the plate-pulling trolley 5. As the plate-pulling trolley 5 moves, the filter plate 2 can pass through the middle of the cleaning bracket 521 without affecting the movement of the cleaning bracket 521. A horizontal frame 522 is vertically slidably connected to the cleaning bracket 521 and is installed with a lifting cylinder for driving the horizontal frame 522 to slide. A nozzle 526 and a cleaning brush 525 are installed on the horizontal frame 522 for spraying water on the filter plate 2 and cleaning the filter plate 2. A water supply pipe 523 is installed on the plate-pulling trolley 5, and a water tank 13 arranged along the crossbeam direction is installed on the frame 1. One end of the water supply pipe 523 penetrates into the water tank 13 to take water, and the other end is connected to the nozzle 526 and supplies water to the nozzle 526. The length of the water tank 13 can cover the entire moving path of the water supply pipe 523, avoiding the water supply pipe 523 from being continuously deformed with the movement of the cleaning mechanism 52, which helps to increase the service life of the water supply pipe 523 and reduce operating costs.

[0039] Reference Figure 2 A water intake trough 131 is provided on the water tank 13, and the water intake trough 131 is laid along the length direction of the water tank 13. The end of the water supply pipe 523 away from the nozzle 526 enters the water tank 13 through the water intake trough 131. When cleaning the filter plate 2, some sludge will be splashed into the air. The water intake trough 131 is located on the side wall of the water tank 13 away from the cross beam, which can effectively prevent the splashed mud from entering the water tank 13, thereby ensuring the cleanliness of the water in the water tank 13 and thus ensuring the cleaning effect.

[0040] Reference Figure 2 and Figure 3 When cleaning the filter plate 2, some silt will be splashed into the air and enter the water tank 13 through the water intake trough 131. If the mud is sucked into the water supply pipe 523, it will affect the cleaning quality of the filter plate. A filter screen 524 is provided at one end of the water supply pipe 523 near the water tank 13 to prevent silt from entering the water supply pipe 523, which helps to ensure the cleaning effect.

[0041] Reference Figure 1 , the water inlet pipe 3 is used for sewage to pass through and enter the filter chamber between the filter plates 2. Before filtering, it is necessary to start the hydraulic cylinder 12 and drive the extrusion plate 11 to move in the direction close to the filter plate 2. After the extrusion plate 11 contacts the filter plate 2, it continues to move, so that the extrusion plate 11 and the filter plate 2 and the adjacent filter plates 2 are closely abutted against each other until the pressure between the adjacent filter plates 2 reaches the filtering standard pressure. The filtering standard pressure means that when the pressure between the adjacent filter plates 2 reaches or exceeds this value, the adjacent filter plates 2 reach a preliminary sealing state, forming a sealed filtering passage, and the sewage to be treated during the filtering process will not flow out from the gap between the adjacent filter plates 2.

[0042] Reference Figure 4 and Figure 5 When the adjacent filter plates 2 are in a separated state or the pressure between the adjacent filter plates 2 does not reach the filtering standard pressure, the sewage after passing through the water inlet pipe 3 will flow directly from the gap between the adjacent filter plates 2. Usually, the valve will not be opened to let in sewage in this state. However, the staff will inevitably make mistakes in long-term work and let in sewage when the pressure between the adjacent filter plates 2 does not reach the filtering standard pressure, which affects the normal filtering work. A blocking plate 14 is slidably connected to the frame 1. The sliding direction of the blocking plate 14 is perpendicular to the length direction of the water inlet pipe 3. A through hole is opened on the blocking plate 14. The area of ​​the overlapping area between the through hole and the water inlet pipe 3 determines the sewage passing capacity of the water inlet pipe 3.

[0043] Reference Figure 4 and Figure 5 , a transmission pipe 6 is fixedly connected to the frame 1, and the first piston 61 and the second piston 62 are slidably connected at both ends of the inner wall of the transmission pipe 6, respectively, to block the transmission fluid and prevent the transmission fluid from leaking. A first transmission rod 63 is fixedly connected between the extrusion plate 11 and the first piston 61, and a second transmission rod 64 is fixedly connected between the blocking plate 14 and the second piston 62. When the extrusion plate 11 approaches the filter plate 2 and squeezes the filter plate 2, it drives the first piston 61 to move in the same direction through the first transmission rod 63. Under the transmission of the transmission fluid, the second piston 62 drives the second transmission rod 64 to move at the same time, and the second transmission rod 64 drives the blocking plate 14 to slide. Before the pressure between the adjacent filter plates 2 reaches the filtering standard pressure, the blocking plate 14 is located at a position to close the water inlet pipe 3. When the pressure between the adjacent filter plates 2 reaches the filtering standard pressure, the blocking plate 14 begins to unblock the water inlet pipe 3. When the pressure between the adjacent filter plates 2 continues to increase, the blocking plate 14 continues to move in the direction of increasing the passing capacity of the water inlet pipe 3 and gradually makes the water inlet pipe 3 completely unblocked. This can prevent sewage from entering the filter chamber through the water inlet pipe 3 before the filter plate 2 is pressed tightly.

[0044] Reference Figure 4 and Figure 5In actual use, the number of filter plates 2 used in the filter press needs to be constantly changed according to actual needs, so the volume of the transmission fluid in the transmission pipe 6 needs to be changed accordingly, so as to match the relationship between the movement process of the extrusion plate 11 and the opening and closing state of the water inlet pipe 3. In this application, an adjustment port is opened on the side wall of the transmission pipe 6, which can realize the adjustment of the volume of the transmission fluid in the transmission pipe 6, and when the number of filter plates 2 changes, it can be adjusted in time.

[0045] Reference Figure 4 and Figure 5 The transmission fluid is replenished and removed through the regulating port. The operation process is relatively cumbersome and inefficient, and it is easy to cause leakage and contamination of the transmission fluid. An regulating tube 65 is fixedly connected to the side wall of the transmission tube 6. The regulating tube 65 is connected to the inside of the transmission tube 6 through the regulating port. An regulating piston 651 is slidably connected in the regulating tube 65, and the regulating piston 651 seals the end face of the regulating tube 65. When the regulating tube 65 is slid, the volume of the transmission fluid in the transmission tube 6 can be adjusted. An adjusting threaded rod 652 is rotatably connected to the regulating tube 65. The adjusting threaded rod 652 is threadedly connected to the adjusting piston 651. The sliding of the adjusting piston 651 can be realized by rotating the adjusting threaded rod 652, thereby realizing the rapid adjustment of the transmission fluid volume in the transmission tube 6.

[0046] Reference Figure 6 and Figure 7 , extruded plate 11 (see Figure 1 ) Under the drive of the water supply pipe 523 of the hydraulic cylinder 12, the rows of filter plates 2 are squeezed, thereby achieving the sealing between adjacent filter plates 2, but the surface texture of the filter plate 2 is relatively hard, the sealing performance is limited, and there is a risk of sewage leakage during use. In the present application, a sealing groove 21 is provided on the filter plate 2, and the sealing groove 21 is connected end to end and is provided on the edge of the side of the filter plate 2, and the holes on the surface of the filter plate 2 are all arranged within the range surrounded by the sealing groove 21, and a sealing strip 22 is provided in the sealing groove 21, and the sealing strip 22 is made of soft rubber and is hollow inside. A pressurized groove 23 is provided on the surface of the filter plate 2, and a transmission piston 231 is provided in the pressurized groove 23, and the transmission piston 231 is slidably connected to the filter plate 2 and the transmission piston 231 seals the end face of the pressurized groove 23, and a ventilation flow channel 24 is connected between the sealing strip 22 and the bottom wall of the pressurized groove 23. When the squeezing plate 11 squeezes the filter plates 2 closer to each other, it drives the piston to slide toward the bottom of the pressurizing groove 23, thereby compressing the air into the sealing strip 22 through the air passage 24 and expanding the sealing strip 22, thereby increasing the sealing performance between adjacent filter plates 2.

[0047] The implementation principle of a filter press for treating mining sludge in the embodiment of the present application is as follows: two group clamping blocks 51 are arranged on the plate pulling trolley 5 along the sliding direction of the filter plate 2, which can not only move the position of the filter plate 2, but also clamp and lock two adjacent filter plates 2; a cleaning mechanism 52 is arranged on the plate pulling trolley 5 and moves with the plate pulling trolley 5; when the plate pulling trolley 5 clamps and locks the filter plate 2, the cleaning mechanism 52 cleans the side of the filter plate 2 close to the cleaning mechanism 52. The cleaning mechanism 52 is integrated into the plate pulling trolley 5, and while retaining the cleaning function, the structures such as the rack, beam body and fixed plate are reduced, and the complexity of the filter press is reduced while realizing the automatic cleaning function.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A filter press for treating mining sludge, comprising a frame (1), a filter plate (2) being horizontally slidably connected to the frame (1), a water inlet pipe (3) for supplying sewage and a water outlet pipe (4) for discharging filtered clean water, a pressing plate (11) for pressing the filter plate (2) and a hydraulic cylinder (12) for driving the pressing plate (11) to move, characterized in that: The frame (1) is horizontally slidably connected to a plate pulling trolley (5), and a clamping block (51) is slidably connected to the plate pulling trolley (5). The clamping block (51) is provided with a clamping groove (511) adapted to the filter plate (2). The sliding direction of the clamping block (51) is perpendicular to the sliding direction of the filter plate (2). The two clamping blocks (51) are distributed along the sliding direction of the filter plate (2). The plate pulling trolley (5) is provided with a cleaning mechanism (52) for cleaning the filter plate (2). The cleaning mechanism (52) is located between the two clamping blocks (51). The frame (1) is slidably connected to a blocking plate (14) for controlling the opening and closing of the water inlet pipe (3). The sliding direction of the blocking plate (14) is perpendicular to the length direction of the water inlet pipe (3). The frame (1) is fixedly connected to A transmission pipe (6) is connected, and a transmission fluid is arranged in the transmission pipe (6). A first piston (61) and a second piston (62) for blocking the transmission fluid are respectively slidably connected at both ends of the transmission pipe (6). A first transmission rod (63) is fixedly connected between the extrusion plate (11) and the first piston (61), and a second transmission rod (64) is fixedly connected between the blocking plate (14) and the second piston (62). When the extrusion plate (11) squeezes the filter plate (2), before the pressure between adjacent filter plates (2) reaches the filtering standard pressure, the blocking plate (14) is located at a position to close the water inlet pipe (3). When the pressure between adjacent filter plates (2) reaches the filtering standard pressure and continues to increase, the blocking plate (14) moves in a direction to increase the passing capacity of the water inlet pipe (3).

2. A filter press for treating mining sludge according to claim 1, characterized in that: The cleaning mechanism (52) comprises a cleaning bracket (521), the cleaning bracket (521) is fixedly connected to the plate pulling trolley (5), a horizontal frame (522) is vertically slidably connected to the cleaning bracket (521), a cleaning brush (525) for cleaning the filter plate (2) and a nozzle (526) for spraying water on the filter plate (2) are provided on the horizontal frame (522), a water supply pipe (523) for supplying water to the nozzle (526) is provided on the plate pulling trolley (5), a water tank (13) for supplying water to the water supply pipe (523) is provided on the frame (1), and the water supply pipe (523) is arranged in the water tank (13) away from the nozzle (526).

3. A filter press for treating mining sludge according to claim 2, characterized in that: The water tank (13) is provided with a water intake groove (131) for the water supply pipe (523) to enter, and the water intake groove (131) is located on the side wall of the water tank (13) away from the cross beam.

4. A filter press for treating mining sludge according to claim 2, characterized in that: A filter screen (524) is provided at one end of the water supply pipe (523) close to the water tank (13) to prevent mud and sand from entering the water supply pipe (523).

5. A filter press for treating mining sludge according to claim 1, characterized in that: The transmission pipe (6) is provided with an adjustment port for adjusting the volume of the transmission fluid in the transmission pipe (6).

6. A filter press for treating mining sludge according to claim 5, characterized in that: The side wall of the transmission tube (6) is connected with an adjusting tube (65) which is in communication with the adjusting port. An adjusting piston (651) is slidably connected inside the adjusting tube (65). The adjusting piston (651) seals the end surface of the adjusting tube (65). An adjusting threaded rod (652) is rotatably connected to the adjusting tube (65) for driving the adjusting piston (651) to slide.

7. A filter press for treating mining sludge according to claim 1, characterized in that: The filter plate (2) is provided with a sealing groove (21), which is connected end to end and is provided at the edge of the side of the filter plate (2). A hollow sealing strip (22) is provided in the sealing groove (21). A pressurizing groove (23) is provided on the surface of the filter plate (2). A transmission piston (231) slidably connected to the filter plate (2) is provided in the pressurizing groove (23). The transmission piston (231) seals the end surface of the pressurizing groove (23). A ventilation channel (24) is connected between the sealing strip (22) and the bottom wall of the pressurizing groove (23).

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