A filter press

Abstract

A filter press includes a fabric stacking device, a filter press frame assembly, and a filter press device. The filter press frame assembly includes a filter press frame and a base plate. The filter press device includes a base, a main hydraulic cylinder, and a pressure plate. The fabric stacking mechanism includes a frame, a filter cloth operating assembly, a sludge discharge mechanism, a sludge separating and pressing mechanism, a pressing roller, and a fabric stacking and feeding mechanism. The filter cloth operating assembly includes a cloth winding mechanism, a winding and measuring mechanism, and a filter cloth correction mechanism. The cloth winding mechanism includes a cloth winding roller that can move along its own axial direction and rotate around its own axis. The cloth winding roller adjusts its position by moving along its own axial direction according to the detection result of the winding and measuring mechanism. The sludge separating and pressing mechanism includes a pressing plate with a horizontally arranged pressing part. The setting height of the pressing roller is adjustable, and the axis of the pressing roller is perpendicular to the moving direction of the lower filter cloth. The fabric stacking and feeding mechanism is located at one end of the frame and is used to transport sludge bags formed by the upper and lower filter cloths wrapping sludge. This invention can automatically correct the filter cloth deviation, keep the filter cloth flat, and prevent sludge leakage.

Description

Technical Field

[0001] This invention belongs to the technical field of filter press equipment, and specifically relates to a fabric stacking device for a fabric stacking filter press. Background Technology

[0002] A filter press is a solid-liquid separation device that works by using pressure to force water out of the filter medium. Currently, the main types of equipment for deep dewatering sludge are horizontal and vertical filter presses. The stacked cloth filter press in vertical filter presses can simultaneously filter multiple layers of filter cloth stacked within a filter press frame, offering high efficiency. A stacked filter press, as disclosed in Chinese invention patent application CN110922018A, includes a stacked cloth assembly, a sludge-covering device, and a pressing device. The stacked cloth assembly includes a stacked cloth frame and a stacked cloth device reciprocally mounted on the frame. The stacked cloth device includes an upper filter cloth operating component and a lower filter cloth operating component. The upper and lower filter cloths, through corresponding operations of their respective operating components, clamp the material between them and move towards the pressing device. The upper and lower filter cloths, encasing the sludge, are stacked layer by layer onto a liftable pallet below the pressing head of the pressing device, where the pressing head descends to filter the sludge. This stacked filter press can achieve automated operation and has high pressing efficiency. However, because this type of stacked filter press involves applying sludge to a long filter cloth before stacking it into the filter press frame for filtration, the filter cloth is prone to misalignment during application or unloading. If this misalignment occurs, not only will sludge leakage be more likely during filtration, but it will also cause the filter cloth to wrinkle and become uneven, making it difficult to retract and unload. Furthermore, insufficient filter cloth tension can also cause wrinkling or unevenness, affecting the length of the retracted cloth. This results in a discrepancy between the length of the filter cloth during application and the length during unloading. After multiple application and unloading cycles, the length of filter cloth retracted by the roll roller is less than the length released, impacting the subsequent normal operation of the filter press. Existing filter press equipment still has room for improvement in areas such as filter cloth correction, automatic filter cloth tensioning, uniform sludge application, and prevention of sludge leakage. Summary of the Invention

[0003] The purpose of this invention is to provide a filter press that can automatically correct the filter cloth, keep the filter cloth flat, and prevent sludge leakage.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A filter press includes a cloth stacking device, a filter press frame assembly, and a filter press device. The filter press frame assembly includes a filter press frame movable between a filter press station and a material preparation station, and a base plate disposed within the filter press frame. The filter press device includes a base, a main hydraulic cylinder, and a pressure plate driven by the main hydraulic cylinder to press the filter cloth located within the filter press frame. The filter cloth includes an upper filter cloth and a lower filter cloth. The cloth stacking device includes a frame, an upper filter cloth operating assembly, a lower filter cloth operating assembly, a sludge discharge mechanism, a sludge separating and pressing mechanism, a pressing roller, and a cloth stacking and feeding mechanism. The lower filter cloth is movably laid on the frame, and the sludge discharge mechanism discharges sludge onto the lower filter cloth. The upper filter cloth operating assembly is mounted on the frame. The upper filter cloth operating assembly includes a first cloth winding mechanism, a first winding and deviation measuring mechanism, and a first filter cloth correction mechanism arranged sequentially. The first cloth winding mechanism includes a winding roller that can move along its own axial direction and rotate around its own axis. The upper filter cloth is wound onto the winding roller of the first cloth winding mechanism. The first winding and deviation measuring mechanism detects whether the upper filter cloth is misaligned. The winding roller of the first cloth winding mechanism adjusts its position by moving along its own axial direction according to the detection result of the first winding and deviation measuring mechanism. The first filter cloth correction mechanism corrects the deviation of the upper filter cloth. The lower filter cloth operating assembly is mounted on the frame. The operating components include a second cloth winding mechanism, a second feeding and correction mechanism, and a second filter cloth correction mechanism arranged sequentially. The second cloth winding mechanism includes a winding roller that can move along its own axis and rotate around its own axis. The lower filter cloth is wound on the winding roller of the second cloth winding mechanism. The second feeding and correction mechanism detects whether the lower filter cloth is misaligned. The winding roller of the second cloth winding mechanism adjusts its position by moving along its own axis according to the detection result of the first feeding and correction mechanism. The second filter cloth correction mechanism corrects the misalignment of the lower filter cloth. The sludge separating and pressing mechanism is set on the frame and located after the sludge discharge mechanism. The sludge separating and pressing mechanism includes components arranged at the... The frame has a pressing plate with a horizontally arranged pressing part, and the length of the pressing plate is at least equal to the width of the lower filter cloth. The pressing roller is arranged on the frame and located after the sludge separating and pressing mechanism. The height of the pressing roller is adjustable and the axis of the pressing roller is perpendicular to the moving direction of the lower filter cloth. After the upper filter cloth passes through the first feeding and measuring mechanism and the first filter cloth correction mechanism, it is laid on the lower filter cloth and passes under the pressing roller together with the lower filter cloth. The stacking and feeding mechanism is horizontally movable and located at one end of the frame, and is used to transport sludge bags formed by the upper and lower filter cloths wrapping the sludge.

[0006] Furthermore, the first fabric winding mechanism further includes: a base disposed on the frame, a fabric winding roller mounting frame movably disposed on the base, a fabric winding roller translation drive unit for driving the fabric winding roller mounting frame to move, and a fabric winding roller rotation drive unit for driving the fabric winding roller to rotate. The fabric winding roller is disposed on the fabric winding roller mounting frame, and the moving direction of the fabric winding roller mounting frame is parallel to the axial direction of the fabric winding roller. The structure of the second fabric winding mechanism is the same as that of the first fabric winding mechanism.

[0007] Furthermore, the base is provided with a guide rail extending in a direction parallel to the axis of the fabric roll, and a slide is provided on the guide rail. The slide can move along the guide rail under the drive of the fabric roll translation drive unit. The fabric roll mounting bracket is provided on the slide. A limit component is provided between the slide and the base. The limit component includes a first limit switch, a second limit switch, and an origin switch provided on the base, and a sensing plate provided on the slide. The first limit switch, the second limit switch, and the origin switch are connected to a PLC and send sensing signals to the PLC. The first limit switch and the second limit switch are spaced apart, and the origin switch is located at the midpoint between the first limit switch and the second limit switch. The movement range of the sensing plate is between the first limit switch and the second limit switch.

[0008] Furthermore, the first fabric rolling mechanism also includes a counting component, which includes a counting wheel disposed at the end of the fabric rolling roller and a counting switch disposed on the fabric rolling roller mounting frame. The counting wheel rotates with the fabric rolling roller, and the counting wheel is provided with an outwardly protruding protrusion. When the counting wheel rotates, the protrusion can touch the counting switch and trigger the counting switch to count.

[0009] Furthermore, the first winding feed deviation measurement mechanism includes: a winding feed deviation measurement mechanism mounting frame disposed on the frame; a winding feed drive roller and a winding feed driven roller disposed on the winding feed deviation measurement mechanism mounting frame; a pair of follower brackets disposed on the winding feed deviation measurement mechanism mounting frame; a pair of guide rods disposed on the winding feed deviation measurement mechanism mounting frame; a guide block disposed on the guide rods and freely movable along the guide rods; a deviation measurement sensor sensing the guide block; and a drive roller drive device driving the winding feed drive roller to rotate around its own axis. The winding feed drive roller and the winding feed driven roller are disposed opposite to each other and can move relative to each other to approach or separate from each other. The follower brackets are connected to the guide blocks, and one follower bracket is disposed on each side of the winding feed drive roller and the winding feed driven roller. The follower brackets are U-shaped, and the guide rods are parallel to the winding feed drive shaft. The structure of the second winding feed deviation measurement mechanism is the same as that of the first winding feed deviation measurement mechanism.

[0010] Furthermore, the first filter cloth correction mechanism includes displacement sensors located on both sides of the filter cloth for detecting whether the filter cloth has shifted left or right, and a first correction roller and a second correction roller arranged opposite to each other. The first correction roller and the second correction roller can move relative to each other, thereby clamping or loosening the filter cloth. The first correction roller and the second correction roller can adjust their positions synchronously in their own axial direction according to the detection signal of the displacement sensor. The structure of the second filter cloth correction mechanism is the same as that of the first filter cloth correction mechanism.

[0011] Furthermore, the first filter cloth correction mechanism further includes: a first support and a second support located on both sides of the filter cloth; a first correction roller mounting frame movably disposed on the first support; a second correction roller mounting frame movably disposed on the second support; a first correction drive unit for driving the first correction roller mounting frame to move; and a second correction drive unit for driving the second correction roller mounting frame to move. The two ends of the first correction roller and the two ends of the second correction roller are respectively disposed on the first correction roller mounting frame and the second correction roller mounting frame, and both the first correction roller and the second correction roller can rotate around their own axis. The first support and the second support are disposed on the frame.

[0012] Furthermore, the pressing roller is mounted on the first support and the second support, and rotates around its own axis under the drive of the pressing roller driving unit.

[0013] Furthermore, the pressing plate is movably mounted on the frame in a vertical direction.

[0014] Furthermore, the sludge pressing and separating mechanism also includes a sludge separating section and baffles disposed on both sides of the sludge separating section; the sludge separating section has at least one protrusion protruding toward the sludge discharge position, and the included angle between the two sides of the projection of the protrusion on the plane where the lower filter cloth is located is between 0 and 180°, and the sludge separating section is located in front of the sludge pressing section.

[0015] Furthermore, the included angle between the two mudguards located on both sides of the mud-dividing section is greater than 0 and less than 180°, and the distance between the front ends of the two mudguards is greater than the distance between their tail ends.

[0016] Furthermore, the distance between the first end of the mudguard and the top end of the protrusion is greater than 0.

[0017] Furthermore, the fabric feeding mechanism includes a movable plate frame that can be moved horizontally on the frame, a fabric support plate that can be moved on the movable plate frame, an active roller and a driven roller that are mounted on the movable plate frame, a chain that passes around the active roller and the driven roller, a plate frame moving drive unit that drives the movable plate frame to move, and a fabric support plate moving drive unit that drives the active roller to rotate. The fabric support plate passes around the active roller and the driven roller to form a closed loop, and the lower filter cloth is supported by the fabric support plate.

[0018] Furthermore, the upper part of the filter press frame is provided with a fabric stacking positioning component, which includes a first fabric stacking positioning mechanism and a second fabric stacking positioning mechanism. The first fabric stacking positioning mechanism and the second fabric stacking positioning mechanism are respectively located at both ends of the reciprocating movement direction of the filter cloth of the filter press frame. The first fabric stacking positioning mechanism includes a first fabric stacking hook and a second fabric stacking hook arranged opposite each other, which are respectively located on both sides of the filter cloth width direction. The second fabric stacking positioning mechanism includes a third fabric stacking hook and a fourth fabric stacking hook arranged opposite each other, which are respectively located on both sides of the filter cloth width direction. The first fabric stacking hook, the second fabric stacking hook, the third fabric stacking hook and the fourth fabric stacking hook are controlled by the fabric stacking drive unit.

[0019] Furthermore, a bottom plate lifting mechanism for controlling the up-and-down movement of the bottom plate is provided below the filter press frame. The bottom plate lifting mechanism includes a lifting mechanism frame, a bottom plate lifting drive unit for driving the bottom plate to move up and down, and a bottom plate positioning pin that contacts the bottom of the bottom plate. A positioning seat that cooperates with the bottom plate positioning pin is provided at the bottom of the bottom plate, and a positioning groove for accommodating the top of the bottom plate positioning pin is provided on the bottom surface of the positioning seat.

[0020] Furthermore, the positioning groove is hemispherical, and the top of the bottom plate positioning pin is correspondingly hemispherical.

[0021] Furthermore, the filter press frame assembly also includes a filter press frame transfer mechanism. The filter press frame transfer mechanism includes a transfer guide rail disposed on the machine base and a push cylinder for pushing the filter press frame. The transfer guide rail can be connected with the base frame on which the filter press frame is placed. The push cylinder can push the filter press frame from the base frame of the filter press frame onto the transfer guide rail or from the transfer guide rail onto the base frame of the filter press frame.

[0022] Furthermore, the machine base is equipped with a lifting cylinder, which is used to control the vertical movement of the transfer guide rail.

[0023] As can be seen from the above technical solutions, the present invention has a high degree of automation, enabling automatic stacking and sludge application, as well as automatic double-sided correction, without the need for manual operation, thus reducing labor costs. Moreover, the cloth winding roller can adjust its position axially according to the detection results of the feeding and correction mechanism. Even if the filter cloth is misaligned due to correction by the upper and lower correction devices or by external forces, it can ensure that the filter cloth on the winding roller is neat and even, without misalignment. At the same time, both the cloth winding roller and the filter cloth correction mechanism can generate tension in the filter cloth, ensuring that the filter cloth will not deform or wrinkle during operation, facilitating the application and unloading of sludge. In addition, the tension roller can be eliminated, simplifying the equipment structure and reducing equipment costs. The sludge pressing roller can press the sludge bag, allowing the thickness of the sludge cake to be adjusted according to actual needs, and ensuring that the sludge bags formed by the upper and lower filter cloths are tightly adhered, preventing sludge leakage during the pressing process and ensuring a good pressing effect. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the filter press according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the fabric stacking device according to an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of the filter cloth operation assembly in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the first winding and deviation measuring mechanism according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the first fabric rolling mechanism according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the mating structure of the fabric roll mounting frame and the base according to an embodiment of the present invention;

[0031] Figure 7 for Figure 6 A magnified view of part A in the middle;

[0032] Figure 8 This is a schematic diagram of the counting wheel in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the first filter cloth correction mechanism in an embodiment of the invention;

[0034] Figure 10 for Figure 9 A magnified view of part B in the middle section;

[0035] Figure 11 This is a schematic diagram of the first filter cloth correction mechanism in an embodiment of the invention from another angle;

[0036] Figure 12 This is a schematic diagram showing the positions of the components of the upper filter cloth and the first filter cloth correction mechanism.

[0037] Figure 13 This is a schematic diagram of the sludge discharge mechanism, sludge separation and pressing mechanism, and fabric stacking and feeding mechanism mounted on the frame according to an embodiment of the present invention.

[0038] Figure 14a This is a schematic diagram of the structure of the mud-pressing plate and the mud-baffle plate according to an embodiment of the present invention;

[0039] Figure 14b This is a top view of the mud-pressing plate and mud-baffle plate according to an embodiment of the present invention;

[0040] Figure 15 This is a schematic diagram of the fabric feeding mechanism according to an embodiment of the present invention;

[0041] Figure 16 This is a schematic diagram of the structure of the filter press frame assembly according to an embodiment of the present invention;

[0042] Figure 17 This is a schematic diagram of the base plate lifting mechanism according to an embodiment of the present invention;

[0043] Figure 18 This is a schematic diagram of a filter press according to another embodiment of the present invention.

[0044] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Detailed Implementation

[0045] The present invention will now be described in detail with reference to the accompanying drawings. In the detailed description of the embodiments of the present invention, for ease of explanation, the drawings illustrating the device structure will be partially enlarged without adhering to the general scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of the present invention. It should be noted that the drawings are in a simplified form and use non-precise scales, solely for the purpose of conveniently and clearly illustrating the embodiments of the present invention. Additionally, in the description of this application, terms such as "first" and "second" are used only to distinguish descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Terms such as "positive," "negative," "bottom," "upper," and "lower" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0046] like Figure 1 As shown, the filter press in this embodiment includes a cloth stacking device A, a filter press frame assembly B, and a filter press device C. The cloth stacking device A is used to apply and unload sludge from the filter cloth. For example, after applying sludge to the filter cloth, the filter cloth is stacked into the filter press frame of the filter press frame assembly B. The filter press frame of the filter press frame assembly B can move between the filter press station and the material preparation station. At the material preparation station, the cloth stacking device A stacks the filter cloth after applying sludge into the filter press frame, or removes the filter cloth after filtration from the filter press frame. At the filter press station, the filter press device C performs filtration on the multiple layers of filter cloth stacked in the filter press frame to remove water from the sludge.

[0047] like Figure 2 As shown, the fabric stacking device in this embodiment includes a frame 1, on which are mounted a first fabric rolling mechanism 2, a first roll feeding and deviation measuring mechanism 3, a first filter cloth deviation correction mechanism 4, a second fabric rolling mechanism 5, a second roll feeding and deviation measuring mechanism 6, a second filter cloth deviation correction mechanism 7, a fabric stacking and feeding mechanism 8, a sludge discharge mechanism 9, a sludge separating and pressing mechanism 10, and a pressing roller 11. The first fabric rolling mechanism 2, the first roll feeding and deviation measuring mechanism 3, and the first filter cloth deviation correction mechanism 4 constitute the upper filter cloth operating assembly, used for operations such as winding / unwinding, deviation correction, and tensioning of the upper filter cloth 101. The second fabric rolling mechanism 5, the second roll feeding and deviation measuring mechanism 6, and the second filter cloth deviation correction mechanism 7 constitute the lower filter cloth operating assembly, used for operations such as winding / unwinding, deviation correction, and tensioning of the lower filter cloth 102. The lower filter cloth 102 is laid on the frame 1. In this embodiment, the frame 1 is equipped with multiple support rollers 1-1. Each support roller 1-1 can rotate around its own axis. The lower filter cloth 102 is laid on the support roller 1-1 and can move forward along the frame 1. The direction of movement of the lower filter cloth 102 is perpendicular to the axis of the support roller 1-1. Using support rollers 1-1 to support the lower filter cloth 101 can reduce the resistance to the movement of the filter cloth.

[0048] Both the upper and lower filter cloth operating components are mounted on the frame 1. In this embodiment, the first cloth winding mechanism 2, the first feeding and measuring mechanism 3, and the first filter cloth correction mechanism 4 are sequentially mounted on the upper layer of the frame 1, while the second cloth winding mechanism 5, the second feeding and measuring mechanism 6, and the second filter cloth correction mechanism 7 are sequentially mounted on the lower layer of the frame 1. As a preferred embodiment, a first filter cloth cleaning mechanism 12 is provided between the first cloth winding mechanism 2 and the first feeding and measuring mechanism 3, and a second filter cloth cleaning mechanism 13 is provided between the second cloth winding mechanism 5 and the second feeding and measuring mechanism 6. The filter cloth cleaning mechanisms are used to spray and clean the filter cloth. The first filter cloth cleaning mechanism 12 and the second filter cloth cleaning mechanism 13 have the same structure, both including upper and lower spray pipes, thus enabling simultaneous automatic cleaning of both sides of the filter cloth, ensuring cleanliness and improving the filtration effect.

[0049] The first fabric winding mechanism 2 and the second fabric winding mechanism 5 of the present invention have the same structure, the first winding and measuring mechanism 3 and the second winding and measuring mechanism 6 have the same structure, and the first filter cloth correction mechanism 4 and the second filter cloth correction mechanism 7 have the same structure. The following will describe several components in the filter cloth operation assembly by taking the first fabric winding mechanism 2, the first winding and measuring mechanism 3 and the first filter cloth correction mechanism 4 as examples. The components in the lower filter cloth operation assembly can be referred to the description of the corresponding components in the upper filter cloth operation assembly.

[0050] like Figure 3 As shown, the first cloth winding mechanism 2, the first feeding and measuring mechanism 3, and the first filter cloth correction mechanism 4 are arranged sequentially. The first cloth winding mechanism 2 is used to wind / unwind the upper filter cloth. The first feeding and measuring mechanism 3 is used to detect whether the upper filter cloth wound onto the cloth winding mechanism 2 has shifted. The first filter cloth correction mechanism 4 is used to correct the upper filter cloth. The first cloth winding mechanism 2 and the first feeding and measuring mechanism 3 are arranged correspondingly. After the first feeding and measuring mechanism 3 detects whether the position of the upper filter cloth has shifted, the first cloth winding mechanism 2 performs corresponding actions based on the detection result of the first feeding and correction mechanism 3. The first filter cloth correction mechanism 4 is located on the side of the frame 1 near the filter press frame (not shown). It mainly corrects the filter cloth during the mud application process or the mud unloading process, ensuring that the filter cloth remains in a consistent position and does not shift.

[0051] like Figure 4As shown, the first winding feed and deviation measuring mechanism 3 in this embodiment includes a winding feed and deviation measuring mechanism mounting frame 3-1, a winding feed active roller 3-2, a winding feed driven roller 3-3, a follower bracket 3-4, a guide rod 3-5, a guide block 3-6, and a deviation measuring sensor 3-7. The winding feed active roller 3-2 and the winding feed driven roller 3-3 are both mounted on the winding feed and deviation measuring mechanism mounting frame 3-1 via bearings. The winding feed active roller 3-2 and the winding feed driven roller 3-3 are arranged opposite to each other. The winding feed active roller 3-2 can rotate around its own axis under the drive of the active roller drive device 3-10 mounted on the winding feed and deviation measuring mechanism mounting frame 3-1. The winding feed active roller 3-2 and the winding feed driven roller 3-3 can move relative to each other, thus bringing them closer together or separating them. To simplify the structure, in this embodiment, the driven roller 3-3 is mounted on the slider 3-8, which is movably mounted on the feeding and measuring mechanism mounting frame 3-1. The movement of the slider 3-8 can be controlled by a lifting drive unit 3-9 mounted on the feeding and measuring mechanism mounting frame 3-1; in this embodiment, a cylinder is used. When the lifting drive unit 3-9 is activated, it drives the slider 3-8 to move up and down on the feeding and measuring mechanism mounting frame 3-1, thereby driving the driven roller 3-3 to move up and down, away from or closer to the driving roller 3-1.

[0052] A pair of follower brackets 3-4 are installed on the mounting frame 3-1 of the winding feed deviation measuring mechanism. The follower brackets 3-4 are located on both sides of the winding feed drive roller 3-2 and the winding feed driven roller 3-3, respectively. The follower brackets 3-4 are mounted on the mounting frame 3-1 via guide blocks 3-6 and guide rods 3-5. The guide rods 3-5 are mounted on the mounting frame 3-1 and are parallel to the winding feed drive roller 3-2. The guide blocks 3-6 are mounted on the guide rods 3-5 and can move along the guide rods 3-5. The follower brackets 3-4 are U-shaped, and their upper ends are connected to the guide blocks 3-6. A deviation measuring sensor 3-7 is used to sense the guide blocks 3-6. When the guide blocks 3-6 move along the guide rods 3-5 to a position detectable by the deviation measuring sensor 3-7, it indicates that the filter cloth position on the follower brackets 3-4 has shifted. The deviation measuring sensor 3-7 can be an ultrasonic sensor.

[0053] When the filter press is dispensing sludge, the driven roller 3-2 moves upward under the action of the lifting drive unit 3-9, separating from the active roller 3-2. The two rollers open to reduce the resistance of the filter cloth during operation. When the filter press is unloading sludge, the driven roller 3-3 moves downward under the action of the lifting drive unit 3-9, approaching the active roller 3-2. The two rollers clamp the filter cloth, creating tension and effectively flattening it for the winding mechanism 2 to take it up.

[0054] like Figure 5As shown, the first fabric winding mechanism 2 in this embodiment includes a fabric winding roller 2-1, a base 2-2, a fabric winding roller mounting frame 2-3, a fabric winding roller rotation drive unit 2-4, and a fabric winding roller translation drive unit 2-5. The fabric winding roller 2-1 is mounted on the fabric winding roller mounting frame 2-3. In this embodiment, the fabric winding roller mounting frame 2-3 is approximately " 凵 The fabric roll 2-1, shaped like the Chinese character "“, is rotatably mounted on the fabric roll mounting frame 2-3. A fabric roll rotation drive unit 2-4, also mounted on the frame 2-3, drives the fabric roll 2-1 to rotate around its own axis. In this embodiment, the fabric roll rotation drive unit 2-4 uses a geared motor. The gears within the gearbox of the geared motor have friction, which provides tension to the filter cloth during the sludge unloading process, preventing wrinkles and maintaining a flat surface for easy unloading. More preferably, a variable frequency geared motor can be used. When in torque mode, the variable frequency geared motor can better apply tension to the filter cloth, ensuring it remains wrinkle-free and flat. The forward and reverse rotation of the motor enables the stacking and unloading of the filter cloth for sludge application and unloading.

[0055] The fabric roll mounting bracket 2-3 is movably mounted on the base 2-2. The moving direction of the fabric roll mounting bracket 2-3 is parallel to the axial direction of the fabric roll 2-1. Therefore, when the feeding and deviation measuring mechanism 3 detects a positional shift in the filter cloth, the position of the fabric roll 2-1 (fabric roll mounting bracket 2-3) can be adjusted accordingly, ensuring the filter cloth is neatly and smoothly wound onto the fabric roll 2-1. The fabric roll translation drive unit 2-5 is used to drive the fabric roll mounting bracket 2-3 to move on the base 2-2. Figure 6As shown, in this embodiment, the fabric roller mounting bracket 2-3 and the base 2-2 are assembled using a slide block + guide rail structure to achieve the sliding installation of the fabric roller mounting bracket 2-3 on the base 2-2. A guide rail 2-21 is provided on the base 2-2, and a slide block 2-22 is provided on the guide rail 2-21. The slide block 2-22 can move along the guide rail 2-21 under the drive of the fabric roller translation drive unit 2-5. The fabric roller mounting bracket 2-3 is mounted on the slide block 2-22, thus allowing it to move on the base 2-2 along with the slide block 2-22. The number of guide rails 2-21 and slides 2-22 can be set according to the product design requirements. In this embodiment, a pair of parallel guide rails 2-21 are set on the base 2-2, and two slides 2-22 are set on each guide rail 2-21. The fabric roll mounting bracket 2-3 is set on the slides 2-22. The cooperation between the slides 2-22 and the guide rails 2-21 can also guide the movement of the fabric roll 2-1. In this embodiment, the fabric roll translation drive unit 2-5 uses a motor. The motor controls the movement of the slides 2-22 through a screw transmission structure. The output shaft of the motor is connected to the ball screw 2-6 through a coupling (not labeled). The ball screw 2-6 is set on the base 2-2 through a fixed seat 2-6a. The screw nut seat 2-7 set on the ball screw 2-6 is connected to one slide 2-22, so that the motor can control the slide 2-22 to move along the guide rail 2-21.

[0056] To control the movement of the fabric roll mounting bracket 2-3 to a certain range, optionally, in this embodiment, a limiting component is provided between the slide block 2-22 and the base 2-2. The limiting component includes a first limit switch 2-8, a second limit switch 2-9, an origin switch 2-10, and a sensing plate 2-11. Although four slide blocks 2-22 are provided in this embodiment, since the four slide blocks 2-22 move synchronously, a limiting component is sufficient to limit the movement of the fabric roll mounting bracket 2-3 by providing a limiting component between one slide block 2-22 and the base 2-2. The first limit switch 2-8, the second limit switch 2-9, and the origin switch 2-10 are all mounted on the base 2-2 and are aligned on the same straight line. The first limit switch 2-8 and the second limit switch 2-9 are used to limit the extreme positions of the slide 2-22 (cloth roll roller 2-1) on the left and right sides during translation. The origin switch 2-10 is located between the first limit switch 2-8 and the second limit switch 2-9, at the midpoint between them. The first limit switch 2-8, the second limit switch 2-9, and the origin switch 2-10 are all connected to a PLC (not shown) and send sensing signals to the PLC. The sensing element 2-11 is mounted on one of the slides 2-22. During the movement of the slide block 2-22, when the sensor 2-11 moves onto it and triggers the first limit switch 2-8 or the second limit switch 2-9, the first limit switch 2-8 or the second limit switch 2-9 will emit a sensing signal. At this time, the fabric roll translation drive unit 2-8 will control the slide block 2-22 to prevent it from moving beyond the range between the first limit switch 2-8 and the second limit switch 2-9 according to the sensing signal. When the slide block 2-22 moves to the sensor 2-11 on it and triggers the origin switch 2-10, the PLC position data is cleared to zero and marked as the origin. At the same time, the first and second limit switches on the left and right sides are set, so that the slide block moves back and forth within the left and right limit positions. If the movement exceeds the limit position, the machine stops and alarms, triggering a signal for the slide block 2-22 to move back to the origin. The limit component controls the fabric roll 2-1 to move only within a certain range. More preferably, as... Figure 7 As shown, the first limit switch 2-8, the second limit switch 2-9, and the origin switch 2-10 are all mounted on a slide plate 2-12. The slide plate 2-12 is mounted on the base 2-2 by threaded fasteners. The slide plate 2-12 has a slide groove 2-12a. The first limit switch 2-8, the second limit switch 2-9, and the origin switch 2-10 are positioned within the slide groove 2-12a and can move within the slide groove 2-12a to adjust their positions. Once the positions are adjusted, they are secured within the slide groove 2-12a by fasteners such as screws and clips located on both sides. Thus, the positions of the first limit switch 2-8, the second limit switch 2-9, and the origin switch 2-10 can be adjusted as needed, thereby adjusting the range of left and right movement of the fabric roller 2-1.

[0057] To ensure that the length of the filter cloth laid out and the length of the filter cloth retracted are consistent and to avoid affecting the normal operation of the filter press, in a preferred embodiment of the present invention, a counting component is also provided on the cloth roll mounting frame 2-3. The technical component includes a counting switch 2-13 disposed on the cloth roll mounting frame 2-3 and a counting wheel 2-14 disposed at the end of the cloth roll 2-1. The counting wheel 2-14 can rotate with the cloth roll 2-1. The counting wheel 2-14 is provided with a protruding protrusion 2-14a. When the counting wheel 2-14 rotates with the cloth roll 2-1 (forward or reverse, such as forward rotation for feeding cloth and reverse rotation for unloading cloth), the protrusion 2-14a will touch the counting switch 2-13 during the rotation, thereby starting the counting switch 2-13 to count and record the number of rotations of the cloth roll 2-1. By counting, as long as the number of rotations of the cloth winding roller 2-1 during cloth feeding and cloth unloading is equal to the number of rotations of the cloth winding roller 2-1 during cloth unloading, the length of cloth feeding and the length of cloth unloading can be ensured to be equal, thus further ensuring the continuous normal operation of the filter press. Figure 8 As shown, the counting wheel 2-14 in this embodiment has three arc-shaped protrusions 2-14a, which are evenly spaced circumferentially. During the rotation of the counting wheel 2-14, the protrusions 2-14a can touch the counting switch 2-13, thereby counting the number of rotations of the fabric rolling roller 2-1. The number of protrusions 2-14a on the counting wheel 2-14 can be set according to requirements, and can be one or more. Theoretically, the more protrusions, the higher the control accuracy.

[0058] The following is a further explanation of the process of correcting the filter cloth deviation between the first feeding and measuring mechanism 3 and the first cloth winding mechanism 2. Taking the upper filter cloth winding process as an example (the unwinding process is the opposite of the winding process, and the lower filter cloth's movement process is the same), after the mud is unloaded, the upper filter cloth passes between the feeding drive roller 3-2 and the feeding driven roller 3-3, and the upper filter cloth simultaneously passes through two follower supports 3-4. One end of the upper filter cloth is wound on the cloth winding roller 2-1. As the cloth winding roller 2-1 rotates, the filter cloth after the mud is unloaded is gradually wound onto the cloth winding roller 2-1. During the upper filter cloth winding process, if the upper filter cloth position shifts, the upper filter cloth will touch the follower bracket 3-4 and cause the follower bracket 3-4 to shift. When the guide block 3-6 connected to the follower bracket 3-4 moves to the detection point of the deviation sensor 3-7, the deviation sensor 3-7 sends a signal indicating that the deviation has been detected. The roll roll translation drive unit 2-5 will control the roll roll 2-1 to move along its own axial direction by controlling the movement of the roll roll mounting bracket 2-3 (slide 2-22), so that the upper filter cloth leaves the offset position, thus achieving neat rolls of filter cloth on the roll roll 2-1. Through the cooperation of the feeding and measuring mechanism and the roll roll mechanism, if the filter cloth still has a small deviation after being corrected by the filter cloth correction mechanism or is deviated by external force, the axial movement of the roll roll 2-1 is controlled to ensure that the filter cloth on the roll roll 2-1 is axially aligned and does not deviate, facilitating subsequent filtration.

[0059] like Figure 9 , Figure 10 and Figure 11 As shown, the first filter cloth correction mechanism in this embodiment includes an upper correction roller 4-1 (first correction roller), a lower correction roller 4-2 (second correction roller), a first correction roller mounting bracket 4-3, a first correction drive unit 4-4, a second correction roller mounting bracket 4-5, a second correction drive unit 4-6, a correction roller movement drive unit 4-7, a first bracket 4-8, and a second bracket 4-9. The first bracket 4-8 and the second bracket 4-9 are used for mounting and supporting the various components. The first filter cloth correction mechanism is mounted on the frame 1 via the first bracket 4-8 and the second bracket 4-9, which are located on the left and right sides of the upper filter cloth, respectively. Displacement sensors 4-17 are also provided on both sides of the filter cloth edge. The displacement sensors 4-17 are used to detect whether the filter cloth has shifted left or right. The displacement sensors 4-17 can be limit switches, photoelectric switches, or other sensors. The displacement sensor 4-17 is located before or after the first filter cloth correction mechanism in the direction of filter cloth movement. When the position of the filter cloth is deviated, it will be detected by the displacement sensor 4-17. The displacement sensor of the filter cloth sends a detection signal to the host computer (not shown). The host computer controls the correction drive unit to move up and down to correct the filter cloth.

[0060] The first and second alignment roller mounting brackets 4-3 and 4-5 are used to mount the upper alignment roller 4-1 and the lower alignment roller 4-2. The two ends of the upper alignment roller 4-1 and the lower alignment roller 4-2 are respectively mounted on the first and second alignment roller mounting brackets 4-3 and 4-5. Both the upper and lower alignment rollers 4-1 and 4-2 can rotate around their own axes. The upper and lower alignment rollers 4-1 and 4-2 are arranged vertically opposite each other, and can move relative to each other in the vertical direction, moving closer or further apart. In this embodiment, the lower straightening roller 4-2 is fixedly mounted on the first straightening roller mounting frame 4-3 and the second straightening roller mounting frame 4-5 via a fixed bearing seat 4-21. The upper straightening roller 4-1 is movably mounted on the first straightening roller mounting frame 4-3 and the second straightening roller mounting frame 4-5 via a sliding bearing seat 4-11, meaning the upper straightening roller 4-1 can move up and down relative to the lower straightening roller 4-2. The straightening roller movement drive unit 4-7 is used to drive the upper straightening roller 4-1 to move vertically. In this embodiment, the straightening roller movement drive unit 4-7 uses a cylinder. A cylinder is respectively mounted on the first straightening roller mounting frame 4-3 and the second straightening roller mounting frame 4-5. The piston rod of the cylinder is connected to the sliding bearing seat 4-11, and the cylinder drives the upper straightening roller 4-1 (sliding bearing seat) to move up and down. In other embodiments, conventional drive units such as motors and electric push rods can also be used to drive the up and down movement of the straightening roller, or the upper straightening roller can be fixed while the lower straightening roller moves.

[0061] The first alignment roller mounting bracket 4-3 is movably mounted on the first support 4-8. The first alignment roller mounting bracket 4-3 and the first support 4-8 are slidably assembled using a slide rail + slider or a slide groove + slider configuration. In this embodiment, a slide groove (not shown) is machined on the first support 4-8. The first alignment roller mounting bracket 4-3 is connected to the first support 4-8 via a connecting part 4-10. One end of the connecting part 4-10 passes through the slide groove on the first support 4-8 and connects to the first alignment drive unit 4-4. Thus, the first alignment drive unit 4-4, mounted on the first support 4-8, can drive the first alignment roller mounting bracket 4-3 to move up and down, closer to or further away from the mounting plane of the first support, via the connecting part 4-10. In this embodiment, the first alignment drive unit 4-4 uses a cylinder; however, in other embodiments, conventional drive units such as motors or electric push rods can also be used. To ensure the parallelism and perpendicularity of the first alignment roller mounting frame 4-3 during its vertical movement, a moving guide portion 4-11 is provided on the first support 4-8. The moving guide portion 4-11 has a guide groove 4-11a extending vertically. The connecting portion 4-10 has a guide protrusion 4-10a disposed within the guide groove 4-11a. The guide protrusion 4-10a of the connecting portion 4-10 can only move vertically within the guide groove 4-11a, ensuring that the first alignment roller mounting frame 4-3 can only move vertically and will not deviate. The mating structure between the second alignment roller mounting frame 4-5 and the second support 4-9 is the same as the mating structure between the first alignment roller mounting frame 4-3 and the first support 4-8. Refer to the description of the mating structure between the first alignment roller mounting frame 4-3 and the first support 4-8; it will not be repeated here.

[0062] To achieve a more compact structure and reduce space occupation, this embodiment integrates the pressing roller 11 onto the first support 4-8 and the second support 4-9. Both ends of the pressing roller 11 are respectively mounted on the first support 4-8 and the second support 4-9. The pressing roller 11 is located below the lower correction roller 4-2. Under the control of the pressing roller drive unit 11-1, the pressing roller 11 can rotate around its own axis. The pressing roller drive unit 11-1 drives the pressing roller 11 to rotate, compacting the sludge wrapped by the upper and lower filter cloths. The height of the pressing roller 11 in the vertical direction is adjustable, meaning the distance between the pressing roller 11 and the filter cloth (sludge bag) is adjustable. In this embodiment, the height of the pressing roller 11 is adjusted via the first mounting slide 4-14 and the second mounting slide 4-15. The first bracket 4-8 is movable up and down on the first mounting slide 4-14, and the second bracket 4-9 is movable up and down on the second mounting slide 4-15. The filter cloth correction mechanism is mounted on the filter press frame through the first and second mounting slides.

[0063] The mating structure between the first bracket 4-8 and the first mounting slide 4-14 is the same as the mating structure between the second bracket 4-9 and the second mounting slide 4-15. The following explanation uses the mating structure between the second bracket 4-9 and the second mounting slide 4-15 as an example. The second bracket 4-9 and the second mounting slide 4-15 can employ a sliding fit structure of slide rail + slider or slide groove + slider, such as... Figure 9 As shown, in this embodiment, the second mounting slide 4-15 is provided with a groove (not labeled) to accommodate the second bracket 4-9. The second bracket 4-9 is disposed in the groove of the second mounting slide 4-15 and can move up and down along the groove. An adjusting screw connection part 4-9a is provided on the second bracket 4-9. The adjusting screw 4-16 is threadedly connected to the adjusting screw connection part 4-9a. The lower end of the adjusting screw 4-16 is connected to the adjusting screw fixing seat 4-18. The adjusting screw fixing seat 4-18 and the second mounting slide 4-15 maintain a fixed relative position. The adjusting screw fixing seat 4-18 and the second mounting slide 4-15 can be an integral structure or a separate structure. In this embodiment, the adjusting screw fixing seat 4-18 and the second mounting slide 4-15 are separate structures. Both the adjusting screw fixing seat 4-18 and the second mounting slide 4-15 are fixedly installed on the filter press frame, so that the positions of the adjusting screw fixing seat 4-18 and the second mounting slide 4-15 are fixed and cannot be moved. By rotating the adjusting screw 4-16, the height of the second bracket 4-9 can be adjusted, causing the second bracket 4-9 to move up and down relative to the second mounting slide 4-15. This adjusts the height of the pressing roller 11, thereby controlling the thickness of the sludge cake. The thickness of the sludge between the upper and lower filter cloths can be set as needed, and the sludge thickness can be adjusted arbitrarily between 3 and 120 mm.

[0064] The following is a further explanation of the filter cloth correction process of the first filter cloth correction mechanism 4:

[0065] like Figure 12 As shown, the upper filter cloth 101 passes between the upper correcting roller 4-1 and the lower correcting roller 4-2, and wraps around to the bottom of the pressing roller 11, so that it can be laid on the lower filter cloth 101 after the mud is applied. During the mud application or unloading process of the filter press, the filter cloth will move along the length of the filter cloth. If the filter cloth is misaligned during the movement, the filter cloth will trigger the displacement sensor 4-17 located on one side of it. The displacement sensor will send a detection signal, and the filter cloth correction drive unit will start to act according to the detection signal, controlling one end of the upper and lower correcting rollers to rise and the other end to fall. The filter cloth will then move towards the higher end of the correcting roller to perform correction.

[0066] For example, refer to Figure 11As shown, if the filter cloth is biased to the right, it will trigger the displacement sensor 4-17 located on the right side. The displacement sensor 4-17 sends a detection signal, and then the first filter cloth correction drive unit 4-4 controls the first correction roller mounting bracket 4-3 to move downward, and the second filter cloth correction drive unit 4-6 controls the second correction roller mounting bracket 4-5 to move upward, so that the right end of the upper correction roller 4-1 and the lower correction roller 4-2 descends and the left end rises, which can quickly achieve filter cloth correction. If the filter cloth is biased to the left, the above action process is reversed.

[0067] Compared with the single-roller correction structure, the upper correction roller 4-1 and the lower correction roller 4-2 can move relative to each other in the vertical direction. When feeding the filter cloth and mud, the gap between the upper correction roller 4-1 and the lower correction roller 4-2 can be increased, thereby reducing the resistance of the filter cloth forward movement. When unloading the filter cloth and mud, the gap between the upper correction roller 4-1 and the lower correction roller 4-2 can be reduced, and the upper filter cloth 102 can be clamped between the upper correction roller 4-1 and the lower correction roller 4-2 and clamped tightly, so that the filter cloth generates tension, flattens the filter cloth, and prevents the filter cloth from wrinkling or becoming uneven.

[0068] The filter cloth operating assembly of this invention has a dual correction function. During the operation of the filter press, both the (first and second) filter cloth correction mechanisms and the (first and second) cloth winding mechanisms can correct the (upper and lower) filter cloth, ensuring that the filter cloth does not become misaligned during sludge application and unloading, thus preventing sludge leakage during application and filtration. Simultaneously, under the action of the feeding and winding mechanism, the filter cloth remains aligned on the winding roller, facilitating cloth unloading. Furthermore, the filter cloth correction mechanism, feeding and winding mechanism, and cloth winding mechanism all generate tension on the filter cloth, ensuring its flatness during operation and facilitating cloth application and unloading. In a preferred embodiment, the sludge cake thickness can be adjusted by regulating the height of the pressing roller, ensuring stable operation, automated operation, and reduced labor costs. Additionally, a counting component ensures that the length of cloth application during each filter cloth application is equal to the length of cloth unloading after filtration, guaranteeing the continued normal operation of the filter cloth in the filter press.

[0069] like Figure 2As shown, the sludge discharge mechanism 9 and the sludge distribution and pressing mechanism 10 are sequentially arranged before the pressing roller 11. The sludge discharge mechanism 9 is used to discharge the sludge to be pressed onto the lower filter cloth 102. The sludge discharge mechanism 9 can be in various forms, such as a screw conveyor, a sludge feeding pipe with a sludge discharge port, or a sludge discharge nozzle. The sludge distribution and pressing mechanism 10 is arranged after the sludge discharge mechanism 9 and is used to evenly distribute and flatten the sludge discharged from the sludge discharge mechanism 9 onto the lower filter cloth 102. After the sludge is discharged onto the lower filter cloth 102 by the sludge discharge mechanism 9, it is distributed and flattened by the sludge distribution and pressing mechanism 10. Then, the upper filter cloth 101 is covered, and the upper and lower filter cloths, which are wrapped with sludge, pass under the pressing roller 11. The pressing roller 11 rolls the filter cloth to form a tightly fitted sludge bag. Through the rolling of the pressing roller 11, the sludge and the upper and lower filter cloths can be tightly bonded, forming a sludge bag while leveling the sludge, preventing sludge leakage during the pressing process.

[0070] like Figure 13 As shown, the sludge pressing mechanism 10 includes at least a pressing plate 10-1, which has a horizontally arranged pressing portion 10-1a. The pressing plate 10-1 is mounted on the frame 1 via a lifting bracket 10-2, spanning above the lower filter cloth 101. The lifting bracket 10-2 can move up and down in the vertical direction, thereby adjusting the distance between the pressing plate 10-1 and the lower filter cloth 102. In this embodiment, a lifting cylinder 10-3 is used as the pressing plate lifting drive unit to control the up and down movement of the lifting bracket 10-2 (pressing plate 10-1). The length of the pressing plate 10-1 corresponds to and is at least equal to the width of the lower filter cloth 102, thereby spreading and flattening the sludge on the lower filter cloth 102. When distributing mud, the mud pressing plate 10-1 descends with the lifting cylinder 10-3 to the position where the mud cake needs to be of the required thickness, so that mud cakes of uniform thickness can be pressed out. When unloading mud, the mud pressing plate 10-1 rises with the lifting cylinder 10-3 to the designated position, reducing resistance and facilitating mud unloading.

[0071] As a preferred embodiment of the present invention, such as Figure 14a and Figure 14bAs shown, the sludge separating and pressing mechanism 10 also includes a sludge separating part 10-4 and baffles 10-5 disposed on both sides of the sludge separating part 10-4. The sludge separating part 10-4 has at least one protrusion 10-4a in the direction facing the sludge 100 discharged from the sludge discharge mechanism 9 onto the lower filter cloth 102. The protrusion 10-4a protrudes toward the sludge discharge position. When the sludge 100 on the lower filter cloth 102 moves with the lower filter cloth 102 to contact the protrusion 10-4a, the protrusion 10-4a can spread the sludge to both sides, thereby achieving the effect of uniform sludge distribution. In this embodiment, the projection of the protrusion 10-4a onto the plane of the lower filter cloth 102 is angular. The included angle α between the two sides of the projection of the protrusion 10-4a can be between 0° and 180° (excluding 0° and 180°). When there are multiple protrusions 10-4a on the sludge distribution section 10-4, the included angle α of each protrusion 10-4a can be the same or different. The value of α is related to the moving speed of the lower filter cloth 102 and the amount of sludge discharged. It can be set and adjusted accordingly based on the moving speed of the lower filter cloth and the amount of sludge discharged. For example, when the amount of sludge discharged is constant, if the running speed of the lower filter cloth is large, α can be appropriately reduced to evenly distribute the sludge when the lower filter cloth moves quickly. Conversely, if the running speed of the lower filter cloth is small, α can be appropriately increased to improve the efficiency of uniform sludge distribution.

[0072] The projection of the sludge separating section 10-4 onto the plane of the lower filter cloth 102 can be formed by splicing together several intersecting straight lines connected in sequence, or by splicing together several circular arcs connected in sequence. As long as a protrusion protruding towards the sludge discharge position can be formed, the purpose of separating sludge to both sides can be achieved. In this embodiment, the projection of the sludge separating section 10-4 onto the plane of the lower filter cloth 102 is a broken line shape formed by connecting four straight lines in sequence, forming two protrusions 10-4a, and the included angle of the two protrusions 10-4a is the same. Mud baffles 10-5 are disposed on both sides of the sludge distribution section 10-4. In this embodiment, the included angle β between the two mud baffles 10-5 is greater than 0 and less than 180°, i.e., 0 < β < 180°. Furthermore, the distance between the first ends of the two mud baffles 10-5 is greater than the distance between their last ends. The end of the mud baffle 10-5 closest to the sludge discharge mechanism 9 is the first end, and the end furthest from the sludge discharge mechanism 9 is the last end. The two mud baffles 10-5 form a converging shape on both sides of the sludge distribution section 10-4. More specifically, the distance L between the first end of the mud baffle 10-5 and the top of the protrusion 10-4a is greater than 0, so that sludge will not leak from both sides of the lower filter cloth 102 during sludge distribution and pressing. The mud-dividing section 10-4 is located before the mud-pressing section 10-1a of the mud-pressing plate 10-1. After the mud-dividing section 10-4 divides the mud, the mud-pressing section 10-1a presses the mud. The mud-blocking plate 10-5 is located on both sides of the mud-pressing plate 10-1.

[0073] The cloth-stacking and feeding mechanism 8 is mounted on the frame 1, located at one end of the frame 1 near the filter press frame (not shown), and is used to stack the filter cloth after mud application into the filter press frame in a layered manner. Figure 13 and Figure 15 As shown, the fabric feeding mechanism 8 in this embodiment includes a movable frame 8-1, a fabric support plate 8-2, a frame movement drive unit 8-3, and a fabric support plate movement drive unit 8-4. The movable frame 8-1 is movably mounted on the frame 1 in a horizontal direction. The movable frame 8-1 and the frame 1 can be installed using a guide rail + slide block or a guide groove + slide rail, allowing the movable frame 8-1 to slide on the frame 1. Driven by the frame movement drive unit 8-3, the movable frame 8-1 can extend horizontally outward from one end of the frame 1, thereby feeding the filter cloth after mud application into the filter press frame. In this embodiment, the frame movement drive unit 8-3 uses a servo motor, which drives the horizontal movement of the movable frame 8-1 through a screw drive mechanism. In other embodiments, a cylinder can also be used to drive the horizontal movement of the movable frame 8-1. The support plate 8-2 is movably mounted on the movable frame 8-1. The support plate 8-2 can be made of a mesh plate, chain plate, or belt, and the mesh plate or chain plate can be made of materials such as stainless steel. The support plate 8-2 is wound around the driving roller 8-5 and the driven roller 8-6 mounted on the movable frame 8-1, forming a closed loop, and rotates on the movable frame 8-1 under the drive of the driving roller 8-5. The filter cloth is laid on the support plate 8-2 and moves with the rolling of the support plate 8-2. In this embodiment, the support plate moving drive unit 8-4 uses a motor. The motor drives the driving roller 8-5 to rotate through a pair of sprockets (not labeled). The driving roller 8-5 drives the driven roller 8-6 to rotate synchronously through the chain 8-7, thereby further driving the support plate 8-2 to move. Under the reciprocating sliding action of the moving plate frame 8-1 and the rotation of the cloth support plate 8-2, the sludge bag performs a Z-shaped stacking action above the filter press frame, stacking the filter cloth after sludge application into the filter press frame. After the sludge is filtered in the filter press frame, the moving plate frame and the cloth support plate move in opposite directions, driving the sludge bag to unload after filtration. During unloading, the pressing roller and pressing plate rise to reduce the resistance during unloading.

[0074] like Figure 16 As shown, the filter press frame assembly of this embodiment includes a filter press frame 14, a base plate 15, a base plate lifting mechanism, and a fabric stacking positioning component. The filter press frame 14 is a box with vertical and horizontal openings. The base plate 15 is movably disposed within the filter press frame 14. When the filter press frame 14 is filled with filter cloth, the base plate 15 is located at the bottom of the filter press frame 14, primarily serving to support the filter cloth. The base plate lifting mechanism is located below the filter press frame 14 and is used to control the lifting and lowering of the base plate 15 within the filter press frame 14. The fabric stacking positioning component is located at the upper part of the filter press frame 14 and includes a first fabric stacking positioning mechanism and a second fabric stacking positioning mechanism. The first and second fabric stacking positioning mechanisms have the same structure, except that they are respectively positioned in the reciprocating movement direction of the filter cloth in the filter press frame 14. Figure 16 The arrows indicate the directions of the reciprocating movement of the filter cloth. The first cloth stacking positioning mechanism includes a first cloth stacking hook 16 and a second cloth stacking hook (not shown). The first and second cloth stacking hooks are positioned opposite each other, located on two opposite side plates of the filter press frame 14, with the filter cloth positioned between the first and second cloth stacking hooks. Both the first and second cloth stacking hooks extend upwards to the top of the filter press frame 14 and are driven by a cloth stacking cylinder 17. The second cloth stacking positioning mechanism includes a third cloth stacking hook 18 and a fourth cloth stacking hook (not shown). The third and fourth cloth stacking hooks are positioned opposite each other, located on two opposite side plates of the filter press frame 14, and also extend upwards to the top of the filter press frame 14, and are driven by a cloth stacking cylinder. The filter cloth is positioned between the third and fourth cloth stacking hooks. That is, the first fabric stacking hook 16 and the third fabric stacking hook 18 are located on the same side plate of the filter press frame 14, and the second fabric stacking hook and the fourth fabric stacking hook are located on another side plate of the filter press frame 14. These two side plates are arranged opposite each other and are located on both sides in the width direction of the filter cloth. The fabric stacking cylinder can also be replaced by a commonly used drive unit such as a motor.

[0075] When applying sludge, the filter cloth will be positioned above the filter press frame 14 along... Figure 16 The cloth feeding mechanism 8 moves back and forth in the direction indicated by the middle arrow. When the cloth feeding mechanism 8 pushes the filter cloth to one end of the filter press frame 14, for example, when it pushes it to... Figure 16 When the filter cloth is pushed to the right end of the filter press frame 14, the first and second stacked cloth hooks operate under the control of their respective stacked cloth cylinders 17, hooking the filter cloth located on the right side of the filter press frame 14. When the filter cloth is pushed to the left, the right end of the filter cloth is aligned, that is, the right turn of the filter cloth is aligned, so that the filter cloth between the upper and lower adjacent layers remains aligned. Similarly, when the filter cloth is pushed to the left end of the filter press frame 14, the third and fourth stacked cloth hooks operate under the control of their respective stacked cloth cylinders 17, hooking the filter cloth located on the left side of the filter press frame 14. When the filter cloth is pushed to the right, the left end of the filter cloth is aligned, that is, the left turn of the filter cloth is aligned, so that the filter cloth between the upper and lower adjacent layers remains aligned, so as to facilitate filtration and sludge discharge.

[0076] When the filter cloth is applied to the filter press frame 14, as the filter cloth is stacked layer by layer into the filter press frame 14, the bottom plate 15 also moves downwards synchronously under the control of the bottom plate lifting mechanism. Figure 17As shown, the base plate lifting mechanism of this embodiment includes a lifting mechanism frame 19, a base plate lifting drive unit 20, and a base plate positioning pin 21. The base plate lifting drive unit 20 is mounted on the lifting mechanism frame 19 and is used to drive the base plate 15 to move up and down. The base plate positioning pin 21 is used to cooperate with the positioning seat 22 located at the bottom of the base plate 15 to position the base plate 15. The base plate lifting drive unit 20 of this embodiment uses a motor. The motor drives the base plate 15 to move up and down through a lead screw transmission structure. The lead screw transmission structure includes a lead screw 23 and a lead screw seat 24 that matches the lead screw 23. This embodiment has a total of 4 sets of lead screw transmission structures, located at the four corners of the base plate 15. The lead screw seat 24 is mounted on the lifting mechanism frame 19. The lead screw 23 is threadedly connected to the lead screw seat 24. The motor drives the lead screw 23 to rotate through a steering gear 25, so that the lead screw 23 can move up and down relative to the lead screw seat 24. The base plate positioning pin 21 is located on the top of the lead screw 23. A positioning seat 22 corresponding to the positioning pin 21 is provided at the bottom of the base plate 15. The bottom of the positioning seat 22 has a positioning groove to accommodate the top of the positioning pin 21. In this embodiment, a hemispherical positioning groove is provided at the bottom of the positioning seat 22, and the top of the positioning pin 21 is correspondingly hemispherical and can be accommodated in the hemispherical positioning groove of the positioning seat 22. The hemispherical mating structure allows the positioning pin 21 and the positioning seat 22 to form a spherical contact, with a large contact area. This not only withstands the weight of the base plate 15 itself and the sludge bag above it, but also withstands the horizontal shear stress generated during equipment movement, thereby ensuring that the base plate remains stable during the up-and-down reciprocating motion of the sludge distribution and unloading process, preventing the base plate from shaking, tipping, or overturning. In other embodiments, the base plate lifting drive unit 20 can also use conventional drive units such as hydraulic cylinders or electric push rods. When a hydraulic cylinder is used, the base plate positioning pin is located at the end of the piston rod of the hydraulic cylinder.

[0077] To facilitate the smooth discharge of filtration water generated during the filtration process, several drainage holes a are machined on the side plates of the filter press frame 14. The inner wall of the side plate can be machined into a smooth surface to reduce the friction between the inner wall of the side plate and the filter cloth, preventing filter cloth clogging or damage, extending the service life of the filter cloth, reducing the frequency of filter cloth replacement, and lowering the cost of filter cloth use. Simultaneously, reinforcing ribs b can be provided on the outer wall of the side plate to improve the strength of the filter press frame 14 and ensure stable operation of the equipment.

[0078] In a preferred embodiment of the present invention, side baffles are provided around the perimeter of the base plate 15. The side baffles can be fixed to the base plate 15 by welding or bolts. During the sludge filtration process, the filter cloth around the base plate 15 will move towards the perimeter of the base plate 15 under the force of the filter press. At this time, the filter cloth will be blocked by the side baffles and will not move downward along the gap between the perimeter of the base plate 15 and the inner wall of the filter press frame 14. In this way, when unloading sludge, no filter cloth will be trapped between the perimeter of the base plate and the inner wall of the filter press frame 14, and the filter cloth will not generate large friction with the inner wall of the filter press frame 14, which facilitates the upward movement of the base plate for unloading sludge.

[0079] In another preferred embodiment of the present invention, a filter press frame transfer mechanism is provided between the filter press and the filter press frame 14 to transfer the filter press frame 14 to the base 26 (filter pressing station) of the filter press device C. The filter press frame transfer mechanism includes a transfer guide rail 27 and a push cylinder 28. The transfer guide rail 27 is disposed on the base 26 of the filter press device C and overlaps with the base frame 29 of the filter press frame 14, so that the push cylinder 28 can push the filter press frame 14 onto the transfer guide rail 27, so that the filter press frame 14 is located at the filter pressing station. Then, the main cylinder 30 of the filter press device C is controlled to move downward, and the sludge wrapped by the filter cloth in the filter press frame 14 is filtered by the pressure plate 31. After the filtration is completed, the push cylinder 28 pushes the filter press frame 14 from the base 26 back to the base frame 29 for sludge unloading and sludge distribution.

[0080] To avoid interference during the filtration process, the transfer guide rail 27 in this embodiment is movably mounted on the base 26. A lifting cylinder 32 is mounted on the base 26 to control the lifting and lowering of the transfer guide rail 27. After the filter press frame 14 completes the sludge application, the lifting cylinder 32 actuates, raising the transfer guide rail 27. The pushing cylinder 28 actuates, pushing the filter press frame 14 above the base 26. The lifting cylinder 32 then descends, lowering the transfer guide rail 27, and the filter press frame 14 is placed on the base 26, allowing the filter press device C to perform filtration. After filtration is complete, the lifting cylinder 32 actuates, raising the transfer guide rail 27. The filter press frame 14, under the action of the pushing cylinder 28, returns to the material preparation area (base frame 29) to unload and apply sludge.

[0081] This invention features a stacking and positioning mechanism on both sides of the filter press frame near the filter cloth. This mechanism positions the ends of the filter cloth after it has been covered with sludge, ensuring that adjacent layers of filter cloth are aligned at turns when the cloth is repeatedly applied above the filter press frame. This facilitates subsequent filtration and sludge unloading. The filter press frame contains a base plate that can be raised and lowered with a lifting mechanism. The entire filter press frame can also move along guide rails to the bottom of the filter press for filtration. Furthermore, because the filter press frame can move between the filtration station and the material preparation station, such as… Figure 18As shown, the filter press can smoothly complete filtration of two or more filter frames in sequence. For example, while the first filter frame is filtration, the second filter frame simultaneously distributes sludge. After the first filter frame completes filtration, it returns to its initial position to unload and distribute sludge, and the second filter frame moves to the bottom of the filter press for filtration. This alternating process reduces the waiting time of the filter press, increases daily production capacity and economy, and lowers costs.

[0082] This invention allows sludge to be directly discharged onto the lower filter cloth and wrapped by the upper and lower filter cloths to form a flat sludge bag. Through the sludge pressing and distributing mechanism, the sludge is evenly distributed between the upper and lower filter cloths. The thickness of the sludge cake is adjustable, and the filter cloth is flat after adjustment, ensuring no sludge leakage during the sludge distribution and pressing process, thus achieving a better pressing effect. At the same time, the sludge bag can be smoothly transported to the top of the filter press frame through the stacking and reciprocating motion to complete the stacking of the sludge bag in the filter press frame. Moreover, after the sludge is pressed in the filter press frame, the cloth can be automatically collected and the sludge can be unloaded, reducing labor costs.

[0083] The filter press of the present invention can complete sludge distribution, sludge discharge, filter cloth correction, filter cloth tensioning, filter cloth cleaning, and uniform sludge distribution during filtration, and the sludge cake thickness can be controlled. It can realize fully automated continuous sludge filtration and improve the economy of sludge filtration.

[0084] Of course, the technical concept of the present invention is not limited to the above embodiments, and many different specific solutions can be obtained based on the concept of the present invention. For example, each drive unit can adopt conventional drive units such as motors, cylinders, electric push rods, and hydraulic cylinders; in addition to the assembly structure of slide block + guide rail, the roll roller mounting frame and the base can also adopt the assembly structure of slide groove + slider to realize the sliding installation between the two; such changes and equivalent transformations should be included within the scope of the present invention.

Claims

1. A filter press, characterized in that, The device includes a cloth stacking device, a filter press frame assembly, and a filter press device. The filter press frame assembly includes a filter press frame that can move between a filter press station and a material preparation station, and a base plate disposed within the filter press frame. The filter press device includes a base, a main oil cylinder, and a pressure plate driven by the main oil cylinder to press the filter cloth located within the filter press frame. The filter cloth includes an upper filter cloth and a lower filter cloth. The fabric stacking device includes: a frame, an upper filter cloth operating assembly, a lower filter cloth operating assembly, a sludge discharge mechanism, a sludge separating and pressing mechanism, a pressing roller, and a fabric stacking and feeding mechanism. The lower filter cloth is movably laid on the frame, and the sludge discharge mechanism discharges sludge onto the lower filter cloth. The upper filter cloth operation assembly is mounted on the frame. The upper filter cloth operation assembly includes a first cloth winding mechanism, a first feeding and measuring mechanism, and a first filter cloth correction mechanism arranged in sequence. The first cloth winding mechanism includes a cloth winding roller that can move along its own axis and rotate around its own axis. The upper filter cloth is wound on the cloth winding roller of the first cloth winding mechanism. The first feeding and measuring mechanism detects whether the upper filter cloth is misaligned. The cloth winding roller of the first cloth winding mechanism adjusts its position by moving along its own axis according to the detection result of the first feeding and measuring mechanism. The first filter cloth correction mechanism corrects the misalignment of the upper filter cloth. The filter cloth lowering operation assembly is mounted on the frame. The filter cloth lowering operation assembly includes a second cloth winding mechanism, a second feeding and measuring mechanism, and a second filter cloth correction mechanism arranged in sequence. The second cloth winding mechanism includes a cloth winding roller that can move along its own axis and rotate around its own axis. The filter cloth lowering is wound on the cloth winding roller of the second cloth winding mechanism. The second feeding and measuring mechanism detects whether the filter cloth lowering is misaligned. The cloth winding roller of the second cloth winding mechanism adjusts its position by moving along its own axis according to the detection result of the second feeding and measuring mechanism. The second filter cloth correction mechanism corrects the misalignment of the filter cloth lowering. The sludge separating and pressing mechanism is mounted on the frame and located after the sludge discharge mechanism. The sludge separating and pressing mechanism includes a pressing plate mounted on the frame. The pressing plate has a horizontally arranged pressing part, and the length of the pressing plate is at least equal to the width of the lower filter cloth. The pressing roller is mounted on the frame and located after the mud separating and pressing mechanism. The height of the pressing roller is adjustable and the axis of the pressing roller is perpendicular to the moving direction of the lower filter cloth. After the upper filter cloth passes through the first feeding and measuring mechanism and the first filter cloth correction mechanism, it is laid on the lower filter cloth and passes under the pressing roller together with the lower filter cloth. The fabric feeding mechanism is horizontally movable and located at one end of the frame, for transporting sludge bags formed by wrapping sludge with upper and lower filter cloths; The first filter cloth correction mechanism includes displacement sensors located on both sides of the filter cloth for detecting whether the filter cloth has shifted left or right, a first correction roller and a second correction roller arranged opposite each other, a first correction roller mounting bracket, a second correction roller mounting bracket, a first correction drive unit, a second correction drive unit, a correction roller movement drive unit, a first bracket, and a second bracket. The first correction roller and the second correction roller can move relative to each other, thereby clamping or loosening the filter cloth. The first correction roller and the second correction roller can synchronously adjust their positions in their own axial direction according to the detection signals of the displacement sensors. The first bracket and the second bracket are located on the left and right sides of the filter cloth, respectively. The first correction roller mounting bracket can move up and down. The first and second correction roller mounting frames are movably mounted on the first support, and the second correction roller mounting frame is movably mounted on the second support. The first correction drive unit drives the first correction roller mounting frame to move up and down, and the second correction drive unit drives the second correction roller mounting frame to move up and down. The two ends of the first and second correction rollers are respectively mounted on the first and second correction roller mounting frames. When the filter cloth position is detected to be offset, the displacement sensor sends a detection signal. The first and second correction drive units act according to the detection signal to control the first and second correction roller mounting frames to move up and down. The structure of the second filter cloth correction mechanism is the same as that of the first filter cloth correction mechanism.

2. The filter press as described in claim 1, characterized in that: The first fabric winding mechanism further includes: a base disposed on the frame, a fabric winding roller mounting frame movably disposed on the base, a fabric winding roller translation drive unit for driving the fabric winding roller mounting frame to move, and a fabric winding roller rotation drive unit for driving the fabric winding roller to rotate. The fabric winding roller is disposed on the fabric winding roller mounting frame, and the moving direction of the fabric winding roller mounting frame is parallel to the axial direction of the fabric winding roller. The structure of the second fabric winding mechanism is the same as that of the first fabric winding mechanism.

3. The filter press as described in claim 2, characterized in that: The base is provided with a guide rail extending in a direction parallel to the axis of the fabric roll. A slide is provided on the guide rail, and the slide can move along the guide rail under the drive of the fabric roll translation drive unit. The fabric roll mounting bracket is provided on the slide. A limit component is provided between the slide and the base. The limit component includes a first limit switch, a second limit switch, and an origin switch provided on the base, and a sensing plate provided on the slide. The first limit switch, the second limit switch, and the origin switch are connected to a PLC and send sensing signals to the PLC. The first limit switch and the second limit switch are spaced apart, and the origin switch is located at the midpoint between the first limit switch and the second limit switch. The movement range of the sensing plate is between the first limit switch and the second limit switch.

4. The filter press as described in claim 2, characterized in that: The first fabric feeding and deviation measuring mechanism includes: the first fabric feeding mechanism further includes a counting component, the counting component includes a counting wheel disposed at the end of the fabric feeding roller and a counting switch disposed on the fabric feeding roller mounting frame, the counting wheel rotates with the fabric feeding roller, the counting wheel is provided with an outwardly protruding protrusion, when the counting wheel rotates, the protrusion can touch the counting switch, triggering the counting switch to count.

5. The filter press as described in claim 1, characterized in that: The first winding feed deviation measurement mechanism includes: a winding feed deviation measurement mechanism mounting frame disposed on the frame; a winding feed active roller and a winding feed driven roller disposed on the winding feed deviation measurement mechanism mounting frame; a pair of follower brackets disposed on the winding feed deviation measurement mechanism mounting frame; a pair of guide rods disposed on the winding feed deviation measurement mechanism mounting frame; a guide block disposed on the guide rods and freely movable along the guide rods; a deviation measurement sensor sensing the guide block; and an active roller drive device driving the winding feed active roller to rotate around its own axis. The winding feed active roller and the winding feed driven roller are disposed opposite to each other and can move relative to each other to approach or separate from each other. The follower brackets are connected to the guide blocks, and one follower bracket is disposed on each side of the winding feed active roller and the winding feed driven roller. The follower brackets are U-shaped, and the guide rods are parallel to the winding feed active roller. The structure of the second winding feed deviation measurement mechanism is the same as that of the first winding feed deviation measurement mechanism.

6. The filter press as described in claim 1, characterized in that: The pressing roller is mounted on the first support and the second support, and rotates around its own axis under the drive of the pressing roller driving unit.

7. The filter press as described in claim 1, characterized in that: The mud-pressing plate is movably mounted on the frame in a vertical direction.

8. The filter press as described in claim 1 or 7, characterized in that: The sludge separating and pressing mechanism further includes a sludge separating section and baffles disposed on both sides of the sludge separating section; the sludge separating section has at least one protrusion protruding toward the sludge discharge position, and the included angle between the two sides of the projection of the protrusion on the plane where the lower filter cloth is located is between 0 and 180°, and the sludge separating section is located in front of the pressing section.

9. The filter press as described in claim 8, characterized in that: The included angle between the two mudguards located on both sides of the mud-dividing section is greater than 0 and less than 180°, and the distance between the front ends of the two mudguards is greater than the distance between their tail ends.

10. The filter press as described in claim 8, characterized in that: The distance between the first end of the mudguard and the top end of the protrusion is greater than 0.

11. The filter press as described in claim 1, characterized in that: The fabric feeding mechanism includes a movable frame that can be moved horizontally on the frame, a fabric support plate that can be moved on the movable frame, an active roller and a driven roller that are mounted on the movable frame, a chain that passes around the active roller and the driven roller, a frame moving drive unit that drives the movable frame to move, and a fabric support plate moving drive unit that drives the active roller to rotate. The fabric support plate passes around the active roller and the driven roller to form a closed loop, and the lower filter cloth is supported by the fabric support plate.

12. The filter press as described in claim 1, characterized in that: The upper part of the filter press frame is provided with a fabric stacking positioning component. The fabric stacking positioning component includes a first fabric stacking positioning mechanism and a second fabric stacking positioning mechanism. The first fabric stacking positioning mechanism and the second fabric stacking positioning mechanism are respectively located at both ends of the reciprocating movement direction of the filter cloth of the filter press frame. The first fabric stacking positioning mechanism includes a first fabric stacking hook and a second fabric stacking hook arranged opposite to each other. The first fabric stacking hook and the second fabric stacking hook are respectively located on both sides of the filter cloth width direction. The second fabric stacking positioning mechanism includes a third fabric stacking hook and a fourth fabric stacking hook arranged opposite to each other. The third fabric stacking hook and the fourth fabric stacking hook are respectively located on both sides of the filter cloth width direction. The first, second, third, and fourth fabric stacking hooks are controlled by the fabric stacking drive unit.

13. The filter press as described in claim 1, characterized in that: Below the filter press frame is a bottom plate lifting mechanism for controlling the up and down movement of the bottom plate. The bottom plate lifting mechanism includes a lifting mechanism frame, a bottom plate lifting drive unit mounted on the lifting mechanism frame for driving the bottom plate to move up and down, and a bottom plate positioning pin that contacts the bottom of the bottom plate. The bottom of the bottom plate is provided with a positioning seat that cooperates with the bottom plate positioning pin, and the bottom surface of the positioning seat is provided with a positioning groove that accommodates the top of the bottom plate positioning pin.

14. The filter press as described in claim 13, characterized in that: The positioning groove is hemispherical, and the top of the positioning pin on the base plate is also hemispherical.

15. The filter press as described in claim 1 or 12, characterized in that: The filter press frame assembly also includes a filter press frame transfer mechanism. The filter press frame transfer mechanism includes a transfer guide rail disposed on the machine base and a push cylinder for pushing the filter press frame. The transfer guide rail can be connected with the base frame on which the filter press frame is placed. The push cylinder can push the filter press frame from the base frame of the filter press frame onto the transfer guide rail or from the transfer guide rail onto the base frame of the filter press frame.

16. The filter press as described in claim 15, characterized in that: The base is equipped with a lifting cylinder, which is used to control the vertical movement of the transfer guide rail.

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