Efficient closed-loop circulating filter pressing system and method

Abstract

The invention relates to the technical field of sludge mechanical filter pressing, and discloses an efficient closed-loop circulating filter pressing system and method.The efficient closed-loop circulating filter pressing system comprises a dry material area, a wet material area, a first-stage filter pressing area and a second-stage filter pressing area; when the linear pushing mechanism acts on the pushing and turning movement chassis, a group of rollers, in the same acting direction as the linear pushing mechanism, of the pushing and turning movement chassis descend and are in contact with the well-shaped circulating track to drive the material box to be lifted; #-shaped rails are adopted for splicing and matched with one-way pushing, the whole rails are firm and durable, the structural stability is improved, the turning movement chassis controls a set of idler wheels with the same acting direction as a linear pushing mechanism to descend and make contact with the #-shaped circulating rails to drive a material box to be lifted, and the transverse and longitudinal required lengths of the system are both reduced; therefore, the adaptability of the whole system and the installation space is improved, four-box cooperative circulation can be realized, and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of sludge mechanical filter press technology, specifically a high-efficiency closed-loop circulating filter press system and method. Background Technology

[0002] Currently, the filter press dewatering, drying and incineration process used in the environmental treatment of solid waste materials such as sludge, fruit pomace, feces and domestic waste has a slow filter press speed. In order to increase the filter press effect, a two-stage filter press is used. The two-stage filter press increases the number of steps and reduces the processing efficiency.

[0003] Chinese patent discloses a dual-cage deep dewatering system device (CN217709205U). This patent uses a unidirectional linear motion method to make the dual cages move in the dewatering system. This method increases the longitudinal length. At the same time, when a two-stage pressure filter is used, the longitudinal length is further increased, resulting in the entire system being linearly distributed.

[0004] Chinese patent discloses a vertical sludge filter press cage moving platform (CN120192070A). This patent solves the problem of bidirectional track movement by ensuring motion stability through the meshing of track wheels and tracks. However, the addition of a rotating platform complicates the structure. During sludge filtration, the track and bottom area bear greater pressure. At the same time, the uneven force on the rotating platform caused by the weight of the press cage itself and the weight of the sludge entering the platform affects the rotation drive structure and the rotating structure itself, ultimately reducing its service life.

[0005] In summary, the best way to increase service life, ensure stability, and reduce linear length is to use a combination of track wheels and track limits, while also enabling the track wheels to move bidirectionally along the track. This transforms the linear distribution into a rectangular distribution, reducing both the required length in the horizontal and vertical directions, thereby improving the adaptability of the entire system to the installation space. Summary of the Invention

[0006] The purpose of this invention is to provide a high-efficiency closed-loop circulating filter press system and method. It employs a well-shaped track splicing system with unidirectional pushing, resulting in low cost and preventing reduced lifespan due to internal stress or microscopic damage caused by track bending. The entire track is robust and durable, increasing structural stability. Simultaneously, utilizing the force applied to the material box by the linear pushing mechanism and the material box's own weight, a set of rollers controlled by the directional movement chassis descends in the same direction as the linear pushing mechanism, contacting the well-shaped circulating track 1 and lifting the material box without affecting the material box's displacement in the driving direction of the linear pushing mechanism. Furthermore, it achieves a mouth-shaped trajectory movement, reducing the system's horizontal and vertical length requirements, thereby improving the system's adaptability to installation space. It also enables four-box coordinated circulation, improving efficiency and solving the problems mentioned in the background art.

[0007] To achieve the above object, the present invention provides the following technical solutions: An efficient closed-loop circulating pressure filtration system includes a dry material area, a wet material area, a primary pressure filtration area, and a secondary pressure filtration area. The dry material area, the wet material area, the primary pressure filtration area, and the secondary pressure filtration area are connected in series through a well-shaped circulating track and are distributed in a rectangular shape at the four corners. Four material boxes are distributed on the well-shaped circulating track, and the four material boxes are driven by four linear pushing mechanisms to move in a "mouth" - shaped trajectory in a circulating manner; A pushing and direction - changing movement chassis is provided at the bottom of the material box. The pushing and direction - changing movement chassis has eight rollers, and the eight rollers are equally divided into two groups, and the directions of the two groups of rollers are perpendicular to each other; When the linear pushing mechanism acts on the pushing and direction - changing movement chassis, a group of rollers in the same direction as the acting direction of the linear pushing mechanism of the pushing and direction - changing movement chassis descends and contacts the well - shaped circulating track to drive the material box to lift.

[0008] As a further scheme of the present invention: The pushing and direction - changing movement chassis has two pushing and direction - changing control components that are distributed vertically and whose control direction lines are perpendicular to each other. The pushing and direction - changing control components are composed of a first lever component and a second lever component. The first lever component consists of two double - rotation trigger force arms and two series - connected pull rods. The two ends of the series - connected pull rods are rotationally connected to the driving ends of the two double - rotation trigger force arms. The series - connected pull rods and the double - rotation trigger force arms are combined into a mouth - shaped structure. The middle parts of the two rotation force arms of the double - rotation trigger force arm limit the rotation center of the double - rotation trigger force arm through a rotating seat. The relative ends of the two rotation force arms slide in the trigger box and are limited by key - slots for sliding.

[0009] As a further scheme of the present invention: The number of the second lever components is four. The second lever component includes a rotating rotary top wheel device and a sliding wheel seat. The top end of the rotary top wheel device is rotationally connected to the series - connected pull rod. A roller is installed at the bottom of the wheel seat. During the rotation of the rotary top wheel device, the bottom end of the rotary top wheel device contacts one end of the top of the wheel seat and drives the wheel seat to slide downward, and the roller contacts the well - shaped circulating track.

[0010] As a further scheme of the present invention: A limiting frame for accommodating the movement of the second lever component is provided on the periphery of the material box. Two insertion rods are fixedly connected to the side surface of the wheel seat, and the insertion rods slide in the key - slots opened on the side surface of the limiting frame.

[0011] As a further scheme of the present invention: The insertion rods and the limiting frame are elastically connected through a first elastic buffer, and the other end of the wheel seat is elastically connected to the limiting frame through a second elastic buffer.

[0012] As a further embodiment of the present invention: a limiting mechanism channel is provided at the cross intersection of the well-shaped circulating track, and each roller at the bottom of the wheel seat has a limiting plate, with at least one limiting plate.

[0013] As a further aspect of the present invention: the two trigger boxes of the same push-direction control component move in the same direction.

[0014] As a further aspect of the present invention, a method of using a high-efficiency closed-loop circulating filter press system includes: Phase 1: The four material bins are named Material Bin A, Material Bin B, Material Bin C, and Material Bin D, respectively. The four linear pushing mechanisms are named Hydraulic Cylinder A, Hydraulic Cylinder B, Hydraulic Cylinder D, respectively. Hydraulic Cylinder A pushes Material Bins A and B, which are arranged side by side. The top of Hydraulic Cylinder A triggers the trigger box, causing the trigger box to move in the same direction as the driving direction of Hydraulic Cylinder A. At this time, one of the double-rotary trigger arms is concave and the other is convex. The double-rotary trigger arm stretches the series tie rod and moves in the opposite direction to the driving direction of Hydraulic Cylinder A. The series tie rod drives the rotating top wheel to rotate. The rotating top wheel drives the wheel seat to descend. The roller with the same direction of movement as Hydraulic Cylinder A contacts the well-shaped circulating track. The reaction force of the roller drives the material bin to rise. Similarly, the convex double-rotary trigger arm drives the double-rotary trigger arm of Material Bin B through the trigger box to repeat the above steps. Material Bins A and B move synchronously. Material Bin B moves to the wet material area, and Material Bin A moves to the position of Material Bin B. Material Bin B fills the wet material area with wet material. At this time, the dry material area is empty. Second stage: The hydraulic cylinder D drives the material box D from the secondary filter press zone into the dry material zone in the same way as the first stage. The material box D is located in the dry material zone and unloads the dry material. At this time, the secondary filter press zone is empty. Third stage: The oil cylinder C drives the material box C into the empty secondary filter press zone for secondary pressing in the same way as in the first stage. At this time, the primary filter press zone is empty. Fourth stage: Cylinder B drives the material box B into the primary filter press zone for pressing in the same manner as in the first stage, thus circulating the process.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The system employs a well-shaped track splicing system with unidirectional pushing, resulting in low cost and preventing reduced lifespan due to internal stress or microscopic damage caused by bending. The entire track is robust and durable, increasing structural stability. Simultaneously, utilizing the force applied to the hopper by the linear pushing mechanism and the hopper's own weight, a set of rollers controlled by the directional movement chassis descends in the same direction as the linear pushing mechanism, contacting the well-shaped circulating track to lift the hopper without affecting its displacement in the driving direction of the linear pushing mechanism. Furthermore, it achieves a chamfered trajectory movement, reducing the system's horizontal and vertical length requirements, thus improving the system's adaptability to installation space and enabling four-hopper coordinated circulation for increased efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0017] Figure 1 A three-dimensional schematic diagram of a high-efficiency closed-loop circulating filter press system; Figure 2 This is a top view schematic diagram of a high-efficiency closed-loop circulating filter press system; Figure 3 This is a schematic diagram of an independent feed box in a high-efficiency closed-loop circulating filter press system; Figure 4 A three-dimensional schematic diagram of a push-and-change motion chassis in a high-efficiency closed-loop circulating filter press system; Figure 5 A schematic diagram of the lowering wheel of a push-and-change motion chassis in a high-efficiency closed-loop circulating filter press system; Figure 6 This is a three-dimensional schematic diagram of the first lever assembly and the second lever assembly in a high-efficiency closed-loop circulating filter press system; Figure 7 A three-dimensional schematic diagram of a well-shaped circulation track in a high-efficiency closed-loop circulating filter press system; Figure 8 This is a schematic diagram showing the positional relationship between the first lever assembly and the second lever assembly in a high-efficiency closed-loop circulating filter press system. Figure 9 This is a schematic diagram of the second lever assembly driving the roller movement in a high-efficiency closed-loop circulating filter press system; In the diagram: 100, Dry material zone; 200, Wet material zone; 300, Primary filter press zone; 400, Secondary filter press zone; 500, Push-and-change motion chassis; 1, Well-shaped circulating track; 11, Limiting mechanism channel; 2, Linear pushing mechanism; 3, Material box; 4, Push-and-change control component; 41, First lever assembly; 411, Double-rotation trigger arm; 4111, Trigger box; 412, Series pull rod; 42, Second lever assembly; 421, Rotary top wheel; 422, Wheel seat; 4221, Insert rod; 5, Limiting frame; 51, First elastic buffer; 52, Second elastic buffer. Detailed Implementation

[0018] Please see Figures 1-9 In this embodiment, there are a dry material zone 100, a wet material zone 200, a primary filter press zone 300, and a secondary filter press zone 400.

[0019] In this embodiment: The dry material area 100 is used to discharge dry materials, the wet material area 200 is used to fill wet materials, and the first-stage pressure filtration area 300 and the second-stage pressure filtration area 400 respectively correspond to pressure filtration equipment with two intensities, or two pressure filtration methods, or two pressure filtration strokes, or two pressure holding times.

[0020] In this embodiment: Since the pressure filtration pressure will be applied reversely at the track, in order to improve the stability and service life of use. The simple way of limiting rollers paired with the track has a higher bearing capacity than universal wheels and Mecanum wheels. However, the limiting rollers have unidirectionality. If the track has a bend, it is necessary to increase the track bending radius to adapt to the commutation movement of the limiting rollers, which instead increases the volume. To solve this problem, the following improvements are made: The wet material area 200, the first-stage pressure filtration area 300, and the second-stage pressure filtration area 400 are connected in series through the well-shaped circulating track 1 and are distributed in a rectangle at the four corners. There are four material boxes 3 distributed on the well-shaped circulating track 1. The four material boxes 3 are driven by four linear pushing mechanisms 2 to move in a circular motion along the "mouth" - shaped trajectory. A push - pressure commutation movement chassis 500 is arranged at the bottom of the material box 3. The push - pressure commutation movement chassis 500 has eight rollers. The eight rollers are equally divided into two groups, and the directions of the two groups of rollers are perpendicular to each other. When the linear pushing mechanism 2 acts on the push - pressure commutation movement chassis 500, a group of rollers in the same direction as the acting direction of the linear pushing mechanism 2 of the push - pressure commutation movement chassis 500 descends and contacts the well-shaped circulating track 1 to drive the material box 3 to lift.

[0021] Improvement content: Please refer to Figure 1 、 Figure 2 , the track of the well-shaped circulating track 1 is formed by splicing straight tracks, which has low cost and the track will not have internal stress problems or internal microscopic damages due to bending, resulting in reduced life. The whole track is firm and durable. Due to the establishment of the well-shaped circulating track 1, the movement direction of the material box 3 is spliced from four straight lines into a closed-loop "mouth" - shaped movement trajectory. Therefore, the linear pushing mechanism 2 is used as the driving structure, and the number of linear pushing mechanisms 2 is 4. The linear pushing mechanism 2 can be selected as an oil cylinder, and the oil cylinder has a greater thrust and a stable structure. However, the direction of the rollers matches the track. To solve this problem, in this technical solution, the number of push - pressure commutation movement chassis 500 is 8, divided into two groups of four. The movement directions of the two groups of rollers are perpendicular to each other. Due to the self - weight of the material box 3, using the force exerted by the linear pushing mechanism 2 on the material box 3, on the basis that the material box 3 cannot have horizontal displacement, the push - pressure commutation movement chassis 500 is enlarged to increase the downward pressure on the rollers, driving the rollers to drive the material box 3 to vertically lift and convert the sliding friction into rolling friction, and then driving the material box 3 to displace. After the rollers drive the material box 3 to lift, the rollers in the other direction cannot contact the well-shaped circulating track 1, so it will not affect the displacement of the material box 3 in the driving direction of the linear pushing mechanism 2.

[0022] To achieve the above method, the push-to-change steering chassis 500 is implemented as follows: The push-to-change motion chassis 500 has two push-to-change control components 4 that are distributed vertically and whose control direction lines are perpendicular to each other. The push-to-change control components 4 are composed of a first lever assembly 41 and a second lever assembly 42. The first lever assembly 41 is composed of two double-rotation trigger arms 411 and two series pull rods 412. The two ends of the series pull rods 412 are rotatably connected to the drive ends of the two double-rotation trigger arms 411. The series pull rods 412 and the double-rotation trigger arms 411 are combined into a U-shaped structure. The center of rotation of the two rotating arms 411 is restricted by a rotating seat. The opposite ends of the two rotating arms slide in the trigger box 4111 and are limited by a keyway.

[0023] Please see Figure 8 ,pass Figure 8 The two-color display clearly shows the positional relationship between the two push-direction control components 4. The double-rotary trigger arm 411 consists of two arms. As shown in the figure, the middle of the arm of the double-rotary trigger arm 411 has a rotating seat, which is fixed to the fixed surface, allowing the arm of the double-rotary trigger arm 411 to rotate around the rotating seat. The opposite ends of the two arms of the double-rotary trigger arm 411 are connected by a trigger box 4111. The opposite ends of the two arms are connected by a series pull rod 412. When one of the trigger boxes 4111 is pushed inward by the linear push mechanism 2, the two ends of the double-rotary trigger arm 411 move away from the material box 3. The two series pull rods 412 drive the arm end of the other double-rotary trigger arm 411 to move towards the material box 3. At this time, the trigger box 4111 appears to bulge outward.

[0024] The number of second lever assemblies 42 is four. The second lever assembly 42 includes a rotating rotary top wheel 421 and a sliding wheel seat 422. The top of the rotary top wheel 421 is rotatably connected to the series tie rod 412. A roller is installed at the bottom of the wheel seat 422. During the rotation of the rotary top wheel 421, the bottom end of the rotary top wheel 421 contacts one end of the top of the wheel seat 422 and drives the wheel seat 422 to slide downward. The roller contacts the well-shaped circulating track 1.

[0025] Based on the movement of the series tie rod 412, the series tie rod 412 drives the rotating top wheel 421 to rotate. The rotation of the top of the rotating top wheel 421 drives the lower end of the rotating top wheel 421 to apply downward pressure to the wheel seat 422. The lowering of the wheel seat 422 drives the roller to contact the well-shaped circulating track 1. Under the influence of the reaction force, the roller lifts the material box 3. At this time, the roller, which is in the same direction of movement as the linear pushing mechanism 2, can move at the well-shaped circulating track 1 after contacting it. The lifted material box 3 drives the roller, which is perpendicular to the direction of movement of the linear pushing mechanism 2, to disengage from the well-shaped circulating track 1.

[0026] This structure can be adapted to the four-way linear push of the well-shaped circulating track 1, and under the double lever clamping, the vertical force applied by the linear push mechanism 2 to the roller is amplified, making it easier to lift the material box 3.

[0027] The material box 3 is provided with a limiting frame 5 around its periphery to accommodate the movement of the second lever assembly 42. Two insert rods 4221 are fixedly connected to the side of the wheel seat 422, and the insert rods 4221 slide in the keyway opened on the side of the limiting frame 5.

[0028] Please see Figure 9 , Figure 9 As shown in the figure above, the tilted rotating top wheel 421 exposes the keyway behind the limit frame 5. Due to the tilting of the rotating top wheel 421, the wheel seat 422 is offset to one side. Since the bottom of the wheel seat 422 is equipped with a roller, even if the rotating top wheel 421 is tilted, the roller can still act on the well-shaped circulation track 1 and drive the material box 3 to move.

[0029] The insertion rod 4221 is elastically connected to the limiting frame 5 through the first elastic buffer 51, and the other end of the wheel seat 422 is elastically connected to the limiting frame 5 through the second elastic buffer 52.

[0030] Please see Figure 8 Under normal conditions, the first elastic buffer 51 and the second elastic buffer 52 drive the roller to remain separated from the well-shaped circulating track 1. Under the influence of the linear pushing mechanism 2, the first elastic buffer 51 and the second elastic buffer 52 undergo elastic deformation of the pushing and changing direction control component 4, driving the roller to contact the well-shaped circulating track 1, so as to avoid interference between the roller perpendicular to the direction of movement and the well-shaped circulating track 1 during unidirectional movement.

[0031] A limit mechanism channel 11 is opened at the cross intersection of the well-shaped circulating track 1, and the rollers at the bottom of the wheel seat 422 are all equipped with limit plates, with at least one limit plate.

[0032] Since the well-shaped circulation track 1 has a cross intersection, this technical direction adopts a one-way limiting roller. Therefore, the well-shaped circulation track 1 has a limiting mechanism channel 11 that allows the limiting part to pass through the intersection of the well-shaped circulation track 1.

[0033] Additional explanation: In the push-and-change-direction control component 4, linear motion is often linked to rotary motion. In this case, the problem of a small amount of displacement perpendicular to the linear motion direction during rotation can be overcome by increasing the sliding connection tolerance at the point of linkage between linear and rotary motion. Alternatively, an additional transmission connection structure can be added to allow both rotational and sliding motion perpendicular to the linear motion direction to occur simultaneously.

[0034] The specific usage method is as follows: Phase 1: The four material bins 3 are named Material Bin A, Material Bin B, Material Bin C, and Material Bin D, respectively. The four linear pushing mechanisms 2 are named Hydraulic Cylinder A, Hydraulic Cylinder B, Hydraulic Cylinder D, respectively. Hydraulic Cylinder A pushes the side-by-side material bins A and B. The top of Hydraulic Cylinder A triggers the trigger box 4111, causing the trigger box 4111 to move in the same direction as the driving direction of Hydraulic Cylinder A. At this time, one of the double-rotary trigger arms 411 is concave and the other is convex. The double-rotary trigger arms 411 stretch the series tie rod 412 to move in the opposite direction to the driving direction of Hydraulic Cylinder A. The series tie rod 412 drives... The rotating top wheel 421 rotates, driving the wheel seat 422 to descend. The roller, which moves in the same direction as the cylinder A, contacts the well-shaped circulation track 1. The reaction force of the roller drives the material box 3 to rise. Similarly, the protruding double-rotation trigger arm 411 drives the double-rotation trigger arm 411 of the material box B through the trigger box 4111 to repeat the above steps. The material boxes A and B move synchronously. The material box B moves to the wet material area 200, and the material box A moves to the position of the material box B. The material box B fills the wet material area 200 with wet material. At this time, the dry material area 100 is empty. Second stage: The hydraulic cylinder D drives the material box D from the secondary filter press zone 400 into the dry material zone 100 in the same way as the first stage. The material box D is located in the dry material zone 100 and unloads the dry material. At this time, the secondary filter press zone 400 is empty. Third stage: The oil cylinder C drives the material box C into the empty secondary filter press zone 400 for secondary pressing in the same way as the first stage. At this time, the primary filter press zone 300 is empty. Fourth stage: Cylinder B drives the material box B into the primary filter press zone 300 for pressing in the same manner as in the first stage, thus performing cyclic processing.

[0035] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency closed-loop circulating filter press system, comprising a dry material zone (100), a wet material zone (200), a primary filter press zone (300), and a secondary filter press zone (400), characterized in that: The dry material area (100), the wet material area (200), the first-stage pressure filtration area (300), and the second-stage pressure filtration area (400) are connected in series through a well-shaped circulating track (1) and are rectangularly distributed at the four corners. Four material boxes (3) are distributed on the well-shaped circulating track (1), and the four material boxes (3) are driven by four linear pushing mechanisms (2) to move in a circular motion along a "mouth" - shaped trajectory. A pushing and deflecting motion chassis (500) is provided at the bottom of the material box (3). The pushing and deflecting motion chassis (500) has eight rollers, and the eight rollers are equally divided into two groups, and the directions of the two groups of rollers are perpendicular to each other. When the linear pushing mechanism (2) acts on the pushing and deflecting motion chassis (500), a group of rollers in the same direction as the acting direction of the linear pushing mechanism (2) of the pushing and deflecting motion chassis (500) descends and contacts the well-shaped circulating track (1) to drive the material box (3) to lift.

2. The high-efficiency closed-loop circulating filter press system according to claim 1, characterized in that: The pushing and deflecting motion chassis (500) has two pushing and deflecting control components (4) distributed vertically and with their control direction lines perpendicular to each other. The pushing and deflecting control component (4) is composed of a first lever component (41) and a second lever component (42). The first lever component (41) is composed of two double - rotation trigger force arms (411) and two series - connected pull rods (412). The two ends of the series - connected pull rod (412) are rotatably connected to the driving ends of the two double - rotation trigger force arms (411). The series - connected pull rod (412) and the double - rotation trigger force arm (411) are combined into a "mouth" - shaped structure. The middle parts of the two rotation force arms of the double - rotation trigger force arm (411) limit the rotation center of the double - rotation trigger force arm (411) through a rotating seat. The relative ends of the two rotation force arms slide in the trigger box (4111) and are limited by key - slot sliding.

3. The high-efficiency closed-loop circulating filter press system and method according to claim 2, characterized in that: The number of the second lever components (42) is four. The second lever component (42) includes a rotating rotary top wheel device (421) and a sliding wheel seat (422). The top end of the rotary top wheel device (421) is rotatably connected to the series - connected pull rod (412). A roller is installed at the bottom of the wheel seat (422). During the rotation of the rotary top wheel device (421), the bottom end of the rotary top wheel device (421) contacts one end of the top of the wheel seat (422) and drives the wheel seat (422) to slide downward, and the roller contacts the well - shaped circulating track (1).

4. The high-efficiency closed-loop circulating filter press system according to claim 3, characterized in that: A limiting frame (5) for accommodating the movement of the second lever component (42) is provided on the periphery of the material box (3). Two inserting rods (4221) are fixedly connected to the side surface of the wheel seat (422), and the inserting rods (4221) slide in the key - slots opened on the side surface of the limiting frame (5).

5. The high-efficiency closed-loop circulating filter press system according to claim 4, characterized in that: The inserting rod (4221) and the limiting frame (5) are elastically connected through a first elastic buffer (51), and the other end of the wheel seat (422) is elastically connected to the limiting frame (5) through a second elastic buffer (52).

6. The high-efficiency closed-loop circulating filter press system according to claim 3, characterized in that: A limit mechanism channel (11) is opened at the cross intersection of the well-shaped circulating track (1), and the rollers at the bottom of the wheel seat (422) are all equipped with limit plates, with at least one limit plate.

7. The high-efficiency closed-loop circulating filter press system according to claim 2, characterized in that: The two trigger boxes (4111) of the same push-direction control component (4) move in the same direction.

8. The method of using a high-efficiency closed-loop circulating filter press system according to any one of claims 1-7, characterized in that: include: Phase 1: The four material boxes (3) are named Material Box A, Material Box B, Material Box C, and Material Box D respectively, and the four linear pushing mechanisms (2) are named Oil Cylinder A, Oil Cylinder B, Oil Cylinder C, and Oil Cylinder D respectively. Oil Cylinder A pushes the material boxes A and B which are arranged side by side. The top of Oil Cylinder A triggers the trigger box (4111), causing the trigger box (4111) to move in the same direction as the driving direction of Oil Cylinder A. At this time, the double-rotation trigger arm (411) is concave in one side and convex in the other side. The double-rotation trigger arm (411) stretches the series tie rod (412) to move in the opposite direction to the driving direction of Oil Cylinder A. The series tie rod (412) drives the rotation. The top wheel (421) rotates, and the rotating top wheel (421) drives the wheel seat (422) to descend. The roller with the same direction of movement as the cylinder A contacts the well-shaped circulation track (1). The reaction force of the roller drives the material box (3) to rise. Similarly, the outwardly protruding double-rotation trigger arm (411) drives the double-rotation trigger arm (411) of the material box B through the trigger box (4111) to repeat the above steps. The material box A and the material box B move synchronously. The material box B moves to the wet material area (200), and the material box A moves to the position of the material box B. The material box B fills the wet material area (200) with wet material. At this time, the dry material area (100) is empty. Second stage: The oil cylinder D drives the material box D from the secondary filter press zone (400) to the dry material zone (100) in the same way as the first stage. The material box D is located in the dry material zone (100) to unload the dry material. At this time, the secondary filter press zone (400) is empty. Third stage: The oil cylinder C drives the material box C into the empty secondary filter press zone (400) for secondary pressing in the same way as the first stage. At this time, the primary filter press zone (300) is empty. Fourth stage: The oil cylinder B drives the material box B into the first-stage filter press zone (300) for pressing in the same way as in the first stage, thus circulating the process.

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