A system for pressing

Abstract

The utility model discloses a kind of squeezing systems, and the squeezing system includes multiple squeezing frames, annular track and driving device;Multiple squeezing frames are located on annular track and are configured to move along annular track, and squeezing frame can hold material;Driving device can drive squeezing frame to move along the extension direction of annular track;Material distribution station, first squeezing station, second squeezing station and stripping station are sequentially arranged along the moving direction of squeezing frame;Material distribution station is provided with material distribution device, which can add material into squeezing frame;First squeezing station is provided with first pressure device, to apply pressure to material in squeezing frame with first preset pressure;Second squeezing station is provided with second pressure device, to apply pressure to material in squeezing frame with second preset pressure;Stripping station is provided with stripping mechanism, which can strip sludge from squeezing frame;Wherein, second preset pressure is greater than first preset pressure.Through staged squeezing, while improving overall efficiency, it also improves the quality of sludge dewatering.

Description

Technical Field

[0001] This utility model relates to the field of sludge dewatering and pressing technology, and in particular to a pressing system. Background Technology

[0002] Mechanical deep dewatering, as one of the most economical sludge dewatering technologies, can reduce the moisture content of sludge to below 45%. It can also synergistically enhance sludge treatment and disposal processes such as incineration, aerobic composting, carbonization for resource recovery, co-incineration in cement kilns, brick making, landscaping, and gasification. This fully leverages the low investment and operating costs of mechanical dewatering, significantly reducing the overall operating and disposal costs of sludge treatment and disposal. It also significantly reduces carbon emissions from both construction and operation perspectives. Therefore, using mechanical methods to dewater sludge to its maximum moisture content through mechanical pressing has significant implications for energy conservation, carbon reduction, and environmental protection in sludge treatment and disposal.

[0003] Chinese Patent Publication No. CN116712777A, entitled "A High-Pressure Gradient Circulating Squeezing System and Squeezing Process," describes a high-pressure gradient circulating squeezing system and its process. The system includes a left-side material feeding machine system, a pressing machine system, and a right-side material feeding machine system. The left and right material feeding machine systems are structurally identical and symmetrically arranged. The pressing machine system comprises a pressing machine body, a hydraulic station, a pressing frame, horizontal push-pull cylinders, lifting cylinders, and a main cylinder. This high-pressure gradient circulating squeezing system requires no additives during the pressing process, takes approximately 30 minutes, operates at room temperature, and has a working pressure of 6-8 MPa. The deep dehydration process requires no auxiliary heat energy, vacuum suction, condensation system, or odor adsorption system. It can deeply dehydrate sludge with a preliminary dehydration content of 85% to below 40% in a single pressing operation, significantly reducing labor costs.

[0004] Chinese Patent Publication No. CN223255099U, entitled "A High-Pressure Vertical Filter Press Dewatering System," describes a system comprising a material feeding unit, a discharge unit, and a filter press unit. The filter press unit includes a press positioned between two workbenches, with a press track at its bottom. The workbenches on either side of the press are respectively equipped with a material feeding unit and a discharge unit. The material feeding unit includes a second upper roll of cloth and a second lower roll of cloth positioned on one side of a second feeding belt. A second trolley is positioned on one side of the second upper roll of cloth, and a second discharge port is positioned on one side of the second lower roll of cloth. The discharge unit includes a first upper roll of cloth and a first lower roll of cloth positioned on one side of a first feeding belt. A first trolley is positioned on one side of the first upper roll of cloth, and a first discharge port is positioned on one side of the first lower roll of cloth. This utility model facilitates the material feeding, filter press, and discharge processes of sludge, exhibiting a high degree of automation.

[0005] However, in related technologies, the pressing system's single pressing cycle is much longer than the fabric feeding cycle, which forces the system's production pace to slow down, resulting in low utilization of the fabric feeding equipment and low overall operating efficiency. Utility Model Content

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a pressing system that, through staged pressing, improves both overall efficiency and the quality of sludge dewatering.

[0007] This utility model provides a pressing system, which includes multiple pressing frames, an annular track, and a driving device. The multiple pressing frames are disposed on the annular track and configured to move along the track, and are used to hold materials. The driving device drives the pressing frames to move along the extension direction of the annular track. A feeding station, a first pressing station, a second pressing station, and a stripping station are sequentially arranged along the moving direction of the pressing frames. The feeding station is equipped with a feeding device for adding materials into the pressing frames. The first pressing station is equipped with a first pressurizing device for applying pressure to the materials in the pressing frames at a first preset pressure. The second pressing station is equipped with a second pressurizing device for applying pressure to the materials in the pressing frames at a second preset pressure. The stripping station is equipped with a stripping mechanism for stripping sludge from the pressing frames. The second preset pressure is greater than the first preset pressure.

[0008] In some embodiments, the annular track is constructed as a rectangular annular track and includes a first longitudinal rail, a second transverse rail, a third longitudinal rail, and a fourth transverse rail arranged sequentially; wherein the fabric processing station, the first pressing station, the second pressing station, and the stripping station are all located on the first longitudinal rail.

[0009] In some embodiments, the driving device includes a first conveying mechanism disposed on the first longitudinal rail, a second conveying mechanism disposed on the second transverse rail, a third conveying mechanism disposed on the third longitudinal rail, and a fourth conveying mechanism disposed on the fourth transverse rail.

[0010] In some embodiments, the first conveying mechanism includes a conveying frame, a first driving member, and a one-way hook assembly; the conveying frame is slidably disposed on the first longitudinal rail; the first driving member is used to drive the conveying frame to reciprocate along the first longitudinal rail; the one-way hook assembly is movably disposed on the conveying frame and has a first working position and a second working position: in the first working position, the one-way hook assembly protrudes from the conveying frame to abut against the pressing frame; in the second working position, the one-way hook assembly moves to below the conveying frame to avoid the pressing frame; wherein, the one-way hook assembly is configured such that when the conveying frame moves along a first direction from the fabric station to the stripping station, the one-way hook assembly is located at the first working position; and when the conveying frame moves along a second direction from the stripping station to the fabric station, the one-way hook assembly is located at the second working position.

[0011] In some embodiments, the second conveying mechanism includes a second driving member and a second transmission rod; one end of the second transmission rod is rotatably mounted on the annular track, and the other end of the second transmission rod is provided with a pulley for abutting against the pressing frame; the driving end of the second driving member is movably connected to the second transmission rod to drive the second transmission rod to rotate, thereby driving the pressing frame to move on the second horizontal rail; and / or, the fourth conveying mechanism includes a fourth driving member and a fourth transmission rod; one end of the fourth transmission rod is rotatably mounted on the annular track, and the other end of the fourth transmission rod is provided with a pulley for abutting against the pressing frame; the driving end of the fourth driving member is movably connected to the fourth transmission rod to drive the fourth transmission rod to rotate, thereby driving the pressing frame to move on the second horizontal rail.

[0012] In some embodiments, the third conveying mechanism includes a third driving member, a transmission screw, and a transmission nut; the extension direction of the transmission screw is generally parallel to the extension direction of the third longitudinal rail; the transmission nut is screwed onto the transmission screw; the third driving member is connected to the transmission screw to drive the transmission screw to rotate and drive the transmission nut to translate along the transmission screw; the flange of the transmission nut is used to abut against the pressing frame.

[0013] In some embodiments, the pressing frame includes a pressing frame body and a movable support plate; the pressing frame body is arranged vertically through the frame; the movable support plate is used to carry the filter cloth and can be vertically and movably disposed within the pressing frame body to move the filter cloth to the top opening.

[0014] In some embodiments, the pressing system further includes a lifting platform disposed on the first longitudinal rail; the size of the lifting platform is configured to be smaller than the bottom opening of the pressing frame body so that the lifting platform can extend into the pressing frame body and drive the movable pallet to move vertically.

[0015] In some embodiments, the first pressurizing device includes a first press and a first frame, the first frame being disposed above the annular track, the first press being mounted on the first frame and used to apply pressure to the material in the pressing frame at a first preset pressure; and / or, the second pressurizing device includes a second press and a second frame, the second frame being disposed above the annular track, the second press being mounted on the second frame and used to apply pressure to the material in the pressing frame at a second preset pressure.

[0016] In some embodiments, the first press and / or the second press are constructed as a hydraulic press, a pneumatic press, or a mechanical press.

[0017] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0018] (1) By setting two pressing operations with different pressures, the pressing effect of the material can be improved and the product quality can be improved;

[0019] (2) Through the layout of the pressing system, multiple pressing frames can be in different positions at the same time. When one pressing frame is performing the second pressing which takes a long time, other pressing frames can perform the feeding, first pressing and stripping operations in parallel. The slow pressing process and the fast feeding process can be parallelized, thereby greatly improving the utilization rate of the feeding equipment and the operating efficiency of the whole system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a pressing system according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the pressing frame at the fabric processing station according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the pressing frame at the first pressing station according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the pressing frame at the second pressing station according to an embodiment of the present utility model;

[0025] Figure 5This is a schematic diagram of the pressing frame at the stripping station according to an embodiment of the present utility model;

[0026] Figures 6-7 This is a schematic diagram of the structure of the first conveying mechanism according to an embodiment of the present utility model;

[0027] Figure 8 This is a structural schematic diagram of a one-way hook assembly according to an embodiment of the present utility model;

[0028] Figure 9 This is a schematic diagram of the structure of the second conveying mechanism according to an embodiment of the present utility model;

[0029] Figure 10 This is a structural schematic diagram of the fourth conveying mechanism according to an embodiment of the present utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] Pressing system 100;

[0032] Circular track 1, fabric station 101, first pressing station 102, second pressing station 103, stripping station 104, first longitudinal rail 11, second transverse rail 12, third longitudinal rail 13, fourth transverse rail 14;

[0033] Press frame 2;

[0034] First pressurizing device 3, first press 31, first frame 32;

[0035] Second pressurizing device 4, second press 41, second frame 42;

[0036] First conveying mechanism 5, conveying frame 51, first driving component 52, one-way hook assembly 53, limiting part 531, bracket 532;

[0037] Second conveying mechanism 6, second driving component 61, second transmission rod 62;

[0038] Third conveying mechanism 7, transmission screw 71, transmission nut 72;

[0039] Fourth conveying mechanism 8, fourth driving component 81, fourth transmission rod 82;

[0040] 9. Lifting platform. Detailed Implementation

[0041] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] The following is for reference. Figures 1-10 A pressing system 100 according to an embodiment of the present invention is described.

[0045] Example 1

[0046] like Figure 1 As shown, this utility model provides a pressing system 100, which includes multiple pressing frames 2, an annular track 1, and a driving device. Multiple pressing frames 2 are arranged on an annular track 1 and configured to move along the annular track 1. The pressing frames 2 are used to hold materials. A driving device is used to drive the pressing frames 2 to move along the extension direction of the annular track 1. A material feeding station 101, a first pressing station 102, a second pressing station 103, and a stripping station 104 are arranged sequentially along the moving direction of the pressing frames 2. The material feeding station 101 is equipped with a material feeding device for adding materials into the pressing frames 2. The first pressing station 102 is equipped with a first pressurizing device 3, which is used to apply pressure to the materials in the pressing frames 2 at a first preset pressure. The second pressing station 103 is equipped with a second pressurizing device 4, which is used to apply pressure to the materials in the pressing frames 2 at a second preset pressure. The stripping station 104 is equipped with a stripping mechanism for stripping sludge from the pressing frames 2. The second preset pressure is greater than the first preset pressure.

[0047] like Figures 2-5 As shown, in a specific application scenario, the drive device drives a pressing frame 2 to sequentially pass through the fabric feeding station 101, the first pressing station 102, the second pressing station 103, and the stripping station 104, and then returns to the fabric feeding station 101 via the circular track 1. When one pressing frame 2 is located at the second pressing station 103, another pressing frame 2 is located at the first pressing station 102, and yet another pressing frame 2 is located at the fabric feeding station 101. At this time, the second pressurizing device 4 applies pressure to the material in one pressing frame 2 at a second preset pressure; the first pressurizing device 3 applies pressure to the material in another pressing frame 2 at a first preset pressure, and the fabric feeding device adds material to the material in yet another pressing frame 2. Finally, one pressing station passes through the stripping station 104 and returns to the fabric feeding station 101 along the path of the circular track 1, serving as a spare pressing frame 2, to enter the next cycle after the current batch of fabric is finished.

[0048] It should be noted that the movement of the equipment between workstations, its stopping at designated locations, and the triggering of corresponding actions (such as the press pressing down) can all be achieved using conventional techniques well-known to those skilled in the art. For example, positioning can be achieved through motor drives and limit switches / proximity sensors, with a PLC or industrial computer acting as a central controller to receive sensor signals and issue commands to the drive unit and actuators. Actions mentioned in the specification, such as "the drive unit drives the pressing frame 2 to move," "stops at the workstation," and "the pressurizing device applies pressure," are all common knowledge and conventional techniques known to those skilled in the art (e.g., positioning via motor drives, limit switches / proximity sensors, and using a PLC or industrial computer as a central controller to coordinate the actions of various components). Once those skilled in the art understand the physical structure and layout of the pressing system 100 disclosed in this application, they can achieve automated operation of the system using the aforementioned conventional control tools and methods without any creative effort. The programming and implementation of the control logic is a conventional design process built upon the physical platform provided by this utility model. Therefore, any details involving specific control programs, algorithms, or circuit implementations are not within the scope of protection claimed in this application.

[0049] As can be seen from the technical solution, the embodiments provided by this utility model have the following advantages:

[0050] (1) By setting two pressing operations with different pressures, the pressing effect of the material can be improved and the product quality can be improved;

[0051] (2) Through the layout of the pressing system 100, multiple pressing frames 2 can be in different positions at the same time. When one pressing frame 2 is performing a second pressing that takes a long time, other pressing frames 2 can perform feeding, first pressing and stripping operations in parallel. The slow pressing process and the fast feeding process can be parallelized, thereby greatly improving the utilization rate of the feeding equipment and the operating efficiency of the whole system.

[0052] In a specific example, at the stripping station 104, the filter cloth in the pressing frame 2 is stripped manually using a stripping mechanism to separate the filter cloth from the sludge.

[0053] Example 2

[0054] like Figure 1 and Figure 2 As shown, the circular track 1 is further constructed as a rectangular circular track 1. The circular track 1 includes a first longitudinal track 11, a second transverse track 12, a third longitudinal track 13, and a fourth transverse track 14 arranged sequentially; wherein, the fabric feeding station 101, the first pressing station 102, the second pressing station 103, and the stripping station 104 are all located on the first longitudinal track 11. The four core energy stations are densely arranged in a straight line, forming a more efficient working area; while the remaining second transverse track 12, third longitudinal track 13, and fourth transverse track 14 constitute an empty return passage, thereby spatially isolating the working station in operation from the empty pressing frame 2 returning, reducing the potential interference that the return movement may cause to the working area.

[0055] It is important to emphasize that the first pressing station 102 and the second pressing station 103 require the installation of the first pressurizing device 3 and the second pressurizing device 4. The first pressurizing device 3 and the second pressurizing device 4 have higher requirements for the stability and rigidity of the foundation. Concentrating the first pressurizing device 3 and the second pressurizing device 4 above the first longitudinal rail 11 allows for the establishment of a shared, robust frame or support structure for the first longitudinal rail 11. This is more economical, simpler, and more stable than constructing multiple independent heavy-duty foundations at different locations on the circular track 1 (such as on the second transverse rail 12 and the fourth transverse rail 14).

[0056] Furthermore, the drive unit includes a first conveying mechanism 5 mounted on the first longitudinal rail 11, a second conveying mechanism 6 mounted on the second transverse rail 12, a third conveying mechanism 7 mounted on the third longitudinal rail 13, and a fourth conveying mechanism 8 mounted on the fourth transverse rail 14. When the pressing frame 2 moves on the first longitudinal rail 11, it is fully loaded with material (such as sludge or slurry). Although the moisture content of the material decreases after passing through the first pressing station 102 and the second pressing station 103, the weight is still considerable, and the first conveying mechanism 5 needs to overcome huge static and dynamic friction forces. In the return zone, the pressing frame 2 is empty, and its weight is only its own weight. The second conveying mechanism 6, the third conveying mechanism 7, and the fourth conveying mechanism 8 only need to overcome the friction force of being unloaded. This configuration can further optimize the system's manufacturing cost, operating energy consumption, and maintenance complexity.

[0057] Example 3

[0058] like Figures 6-8 As shown, the first conveying mechanism further includes a conveying frame 51, a first driving member 52, and a one-way hook assembly 53. The conveying frame 51 is slidably disposed on a first longitudinal rail. The first driving member 52 is used to drive the conveying frame 51 to reciprocate along the first longitudinal rail. The one-way hook assembly 53 is movably disposed on the conveying frame 51 and has a first working position and a second working position: in the first working position, the one-way hook assembly 53 protrudes from the conveying frame 51 to abut against a pressing frame; in the second working position, the one-way hook assembly 53 moves to below the conveying frame 51 to avoid the pressing frame. The one-way hook assembly 53 is configured such that when the conveying frame 51 is driven to move in a first direction from the fabric station to the stripping station, the one-way hook assembly 53 is located in the first working position. At this time, the protruding limiting part 531 can abut against and push the pressing frame, causing it to move synchronously towards the peeling station along with the conveying frame 51; when the conveying frame 51 is driven to move along the second direction from the peeling station to the fabricating station, the one-way hook assembly 53 is located at the second working position. This allows the conveying frame 51 to pass over the pressing frame and independently return to the fabricating station, completing the reset. For example, the one-way hook assembly 53 includes a drive motor and a limiting protrusion, the limiting protrusion being extendable and retractable on the conveying surface of the conveying frame 51; when the conveying frame 51 is driven to move along the first direction from the fabricating station to the peeling station, the drive motor drives the limiting protrusion to extend out of the conveying surface of the conveying frame 51; when the conveying frame 51 is driven to move along the second direction from the peeling station to the fabricating station, the drive motor drives the limiting protrusion to retract below the conveying surface of the conveying frame 51.

[0059] like Figure 8As shown, for example, the one-way hook assembly 53 includes a limiting part 531 and a bracket 532. The bracket 532 is fixedly mounted on the conveyor frame 51, and the limiting part 531 is rotatably mounted on the conveyor frame 51. The limiting part 531 includes a limiting body and a locking part, and the bracket 532 has an abutting end plate. In the first working position, the limiting body protrudes from the conveying surface, and its locking part abuts against the abutting end plate of the bracket 532. At this time, if the pressing frame applies a pushing force to the limiting body, the torque generated by this force that causes the limiting part 531 to rotate is equal in magnitude and opposite in direction to the reverse torque generated by the reaction force on the locking part at the abutting end plate, thereby keeping the limiting part 531 in a mechanically self-locking state and reliably pushing the pressing frame. When the conveyor frame 51 needs to move in the opposite direction (towards the fabric station), its motion state changes. At this time, the movement of the pressing frame lags behind the conveyor frame 51, thereby generating a reverse pushing force or resistance on the limiting body. This reverse force disrupts the original torque balance, generating a torque that causes the limiting part 531 to rotate downwards about the axis of rotation. Under the action of this torque, the locking part separates from the abutting end plate of the bracket 532, and the limiting part 531 then rotates downwards until the limiting body is completely retracted below the conveying surface of the conveying frame 51, entering the second working position. This process relies on the relative motion of the mechanism itself to achieve automatic unlocking and retraction, without the need for additional power.

[0060] A return spring is also provided between the limiting part 531 and the bracket 532. The elastic force of the return spring makes the limiting part tend to move to the first working position.

[0061] like Figures 6-7 As shown, in a specific example, the conveyor frame 51 has three working positions, numbered A, B, and C sequentially from the fabric working position to the peeling working position. Each working position corresponds to a one-way hook assembly 53. The conveyor frame 51 moves one working position distance along the first longitudinal rail in the direction from the fabric working position to the peeling working position (first direction). During this process:

[0062] The one-way hook assembly 53, located at the action position A, is in the protruding first working position, pushing the pressing frame, which is currently located at the fabric station, so that it moves along the first longitudinal rail to the first pressing station.

[0063] At the same time, the one-way hook assembly 53 located at the action position B pushes the pressing frame, which is currently located at the first pressing station, to move it to the second pressing station.

[0064] At the same time, the one-way hook assembly 53 located at the action position C pushes the pressing frame, which is currently located at the second pressing station, to move it to the stripping station.

[0065] Once the pressing frame is pushed to the corresponding workstation, the conveyor frame 51 moves in the opposite direction (second direction) and returns to the starting position. At this time, each unidirectional hook assembly 53 automatically retracts or is controlled to switch to the second workstation under the reverse resistance of the pressing frame, allowing the conveyor frame 51 to pass over the fixed pressing frame without load and complete the reset.

[0066] At the stripping station, the pressed material is manually (or through an auxiliary mechanism) stripped from the pressing frame. Afterward, the empty pressing frame is manually transferred to the second horizontal rail and begins to move along the return track (second horizontal rail, third vertical rail, fourth horizontal rail), eventually returning to the vicinity of the fabric placement station for later use.

[0067] After the conveyor frame 51 is reset, the material feeding device adds material to an empty press frame that is already in the material feeding station, and the system is ready to enter the next work cycle.

[0068] like Figure 9 As shown, the second conveying mechanism 6 further includes a second driving member 61 and a second transmission rod 62; one end of the second transmission rod 62 is rotatably mounted on the annular track 1, and the other end of the second transmission rod 62 is provided with a pulley for abutting against the pressing frame 2; the driving end of the second driving member 61 is movably connected to the second transmission rod 62 to drive the second transmission rod 62 to rotate, thereby driving the pressing frame 2 to move on the second horizontal rail 12.

[0069] In a specific example, the second drive member 61 is constructed as a drive motor or a hydraulic press. One end of the second transmission rod 62 is hinged to the second horizontal rail 12, and the drive end of the second drive member 61 is hinged to the second transmission rod 62. The pulley at the other end of the second transmission rod 62 pushes the pressing frame 2 to move in the following direction: from the end of the second horizontal rail 12 connected to the first longitudinal rail 11 to the end of the second horizontal rail 12 connected to the third longitudinal rail 13.

[0070] like Figure 10 As shown, the fourth conveying mechanism 8 further includes a fourth driving member 81 and a fourth transmission rod 82; one end of the fourth transmission rod 82 is rotatably mounted on the annular track 1, and the other end of the fourth transmission rod 82 is provided with a pulley for abutting against the pressing frame 2; the driving end of the fourth driving member 81 is movably connected to the fourth transmission rod 82 to drive the fourth transmission rod 82 to rotate, thereby driving the pressing frame 2 to move on the second horizontal rail 12.

[0071] In a specific example, the fourth drive element 81 is constructed as a drive motor or a hydraulic press. One end of the fourth transmission rod 82 is hinged to the fourth horizontal rail 14, and the drive end of the fourth drive element 81 is hinged to the fourth transmission rod 82. The pulley at the other end of the fourth transmission rod 82 pushes the pressing frame 2 to move in the following direction: from the end of the fourth horizontal rail 14 connected to the third vertical rail 13 to the end of the fourth horizontal rail 14 connected to the first vertical rail 11.

[0072] Furthermore, the third conveying mechanism 7 includes a third driving member, a transmission screw 71, and a transmission nut; the extension direction of the transmission screw 71 is approximately parallel to the extension direction of the third longitudinal rail; the transmission nut is screwed onto the transmission screw 71; the third driving member is connected to the transmission screw 71 to drive the transmission screw 71 to rotate and drive the transmission nut to translate along the transmission screw 71; the flange of the transmission nut is used to abut against the press frame 2.

[0073] For example, the third conveying mechanism 7 can also use a chain or cylinder to convey the pressing frame 2.

[0074] Example 3

[0075] Furthermore, the pressing frame 2 includes a pressing frame body and a movable support plate. The pressing frame body is vertically continuous; the movable support plate is used to support the filter cloth and can be vertically movable within the pressing frame body to move the filter cloth to the top opening. That is to say, the pressing frame body is vertically continuous, with openings at both its top and bottom, thus forming a vertical material channel. The movable support plate is movably disposed within the internal cavity of the pressing frame body and is used to support the filter cloth.

[0076] As can be seen from the above embodiments, when the movable pallet rises at the fabric station 101, it drives the filter cloth to rise, which facilitates the fabric stacking and chopping operation.

[0077] like Figure 3 As shown, the pressing system 100 further includes a lifting platform 9, which is located at the fabric feeding station 101 of the first longitudinal rail 11. The size of the lifting platform 9 is configured to be smaller than the bottom opening of the pressing frame body so that the lifting platform 9 can extend into the pressing frame body and drive the movable pallet to move vertically. When the pressing frame 2 moves to the fabric feeding station 101, the lifting platform 9 is controlled to rise by its own drive mechanism (such as a servo motor, hydraulic cylinder, or electric push rod). The upper surface of the lifting platform 9 contacts and supports the movable pallet located at the bottom of the pressing frame 2. Subsequently, the lifting platform 9 continues to rise, thereby driving the movable pallet and the filter cloth it carries to move vertically upward within the pressing frame body until the preset fabric feeding height (such as being flush with the top opening) is reached, facilitating the fabric stacking and chopping operation. After the fabric stacking and chopping operation is completed, the lifting platform 9 descends and resets, separating from the movable pallet, and the pressing frame 2 can then move freely to the next station.

[0078] For example, the first longitudinal rail 11 is provided with a first clearance opening at the fabric station 101; the lifting platform 9 is installed below the first longitudinal rail 11 and can extend into the bottom opening of the pressing frame body through the first clearance opening.

[0079] Example 4

[0080] like Figure 2 As shown, the first pressurizing device 3 further includes a first press 31 and a first frame 32. The first frame 32 is located above the annular track 1. The first press 31 is mounted on the first frame 32 and is used to apply pressure to the material in the pressing frame 2 at a first preset pressure.

[0081] like Figure 2 As shown, the second pressurizing device 4 further includes a second press 41 and a second frame 42. The second frame 42 is located above the annular track 1. The second press 41 is mounted on the second frame 42 and is used to apply pressure to the material in the pressing frame 2 at a second preset pressure.

[0082] As can be seen from the above embodiments, at the first pressing station 102, the drive end of the first press 31 extends into the pressing frame 2 through the top opening of the pressing frame 2. At the second pressing station 103, the drive end of the second press 41 extends into the pressing frame 2 through the top opening of the pressing frame 2.

[0083] The first preset pressure here refers to the initial pressure applied to the material by the first press 31 at the first pressing station 102, and this pressure value is relatively low. The second preset pressure refers to the final pressure applied to the material by the second press 41 at the second pressing station 103. This pressure value is greater than the first preset pressure, that is, the second preset pressure > the first preset pressure.

[0084] The initial preset pressure is used to rapidly expel free water from the material. The material (such as sludge) initially contains a large amount of free water existing between the particles. Applying a relatively low pressure is sufficient to disrupt this loose structure, allowing the free water to be quickly squeezed out with minimal resistance. This stage is the one with the highest dewatering efficiency and the fastest water output rate.

[0085] The second preset pressure is used for further removal of some adsorbed water and to form a dense filter cake. After the first stage of pressing, the material particles are brought closer together, forming a more compact structure. At this point, most of the free water has been removed, and the remaining water is mostly adsorbed between the particles or attached to the particle surface by capillary forces. To remove this water, greater resistance needs to be overcome. Therefore, significantly higher pressure must be applied to further compress the particles, break down the capillaries, squeeze out deeper layers of water, and thus further reduce the final moisture content of the material.

[0086] Compared to applying high pressure all at once, stepwise pressurization can more thoroughly separate and discharge water in different forms, resulting in a better dehydration effect (i.e., the dryness of the filter cake).

[0087] It should also be noted that the first preset pressure and the second preset pressure are set and adjusted by those skilled in the art according to specific actual production goals.

[0088] Furthermore, the first press 31 is configured as a hydraulic press, a pneumatic press, or a mechanical press.

[0089] Furthermore, the second press 41 is constructed as a hydraulic press, a pneumatic press, or a mechanical press. Other configurations and operations of the pressing system 100 according to this embodiment are known to those skilled in the art and will not be described in detail here. In the description of this invention, "first feature" and "second feature" may include one or more of these features. The vertical, horizontal, and front-back directions are defined as shown in the figures.

[0090] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Moreover, "above," "over," and "on top" of the second feature include the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pressing system, characterized in that, include: Circular track; Multiple pressing frames, disposed on the annular track and configured to move along the annular track, are used to hold materials; A driving device for driving the pressing frame to move along the extension direction of the annular track; Along the moving direction of the pressing frame, a fabric feeding station, a first pressing station, a second pressing station, and a stripping station are arranged in sequence. The fabric feeding station is equipped with a fabric feeding device for adding material into the press frame; The first pressing station is equipped with a first pressurizing device, which is used to apply pressure to the material in the pressing frame at a first preset pressure; The second pressing station is equipped with a second pressurizing device, which is used to apply pressure to the material in the pressing frame at a second preset pressure; The stripping station is equipped with a stripping mechanism for stripping sludge from the pressing frame. The second preset pressure is greater than the first preset pressure.

2. The pressing system according to claim 1, characterized in that, The circular track is constructed as a rectangular circular track and includes a first longitudinal rail, a second transverse rail, a third longitudinal rail, and a fourth transverse rail arranged sequentially. The fabric processing station, the first pressing station, the second pressing station, and the stripping station are all located on the first longitudinal rail.

3. The pressing system according to claim 2, characterized in that, The driving device includes a first conveying mechanism disposed on the first longitudinal rail, a second conveying mechanism disposed on the second transverse rail, a third conveying mechanism disposed on the third longitudinal rail, and a fourth conveying mechanism disposed on the fourth transverse rail.

4. The pressing system according to claim 3, characterized in that, The first conveying mechanism includes: The conveyor frame is slidably mounted on the first longitudinal rail; The first driving component is used to drive the conveying frame to reciprocate along the first longitudinal rail; A one-way hook assembly is movably disposed on the conveying frame and has a first working position and a second working position: at the first working position, the one-way hook assembly protrudes from the conveying frame to abut against and cooperate with the pressing frame; at the second working position, the one-way hook assembly moves to the bottom of the conveying frame to avoid the pressing frame. The one-way hook assembly is configured such that when the conveying frame moves along a first direction from the fabric station to the stripping station, the one-way hook assembly is located at a first working position; and when the conveying frame moves along a second direction from the stripping station to the fabric station, the one-way hook assembly is located at a second working position.

5. The pressing system according to claim 3, characterized in that, The second conveying mechanism includes a second driving element and a second transmission rod; One end of the second transmission rod is rotatably mounted on the annular track, and the other end of the second transmission rod is provided with a pulley for abutting against the pressing frame; The driving end of the second driving member is movably connected to the second transmission rod to drive the second transmission rod to rotate, thereby driving the pressing frame to move on the second horizontal rail; Or, the fourth conveying mechanism includes a fourth driving element and a fourth transmission rod; One end of the fourth transmission rod is rotatably mounted on the annular track, and the other end of the fourth transmission rod is provided with a pulley for abutting against the pressing frame; The driving end of the fourth driving member is movably connected to the fourth transmission rod to drive the fourth transmission rod to rotate, thereby driving the pressing frame to move on the second horizontal rail.

6. The pressing system according to claim 3, characterized in that, The third conveying mechanism includes a third driving component, a transmission screw, and a transmission nut; The extension direction of the transmission lead screw is approximately parallel to the extension direction of the third longitudinal rail; The transmission nut is screwed onto the transmission lead screw; The third driving component is connected to the transmission screw to drive the transmission screw to rotate and drive the transmission nut to translate along the transmission screw. The flange of the drive nut is used to abut against the press frame.

7. The pressing system according to claim 2, characterized in that, The pressing frame includes a pressing frame body and a movable tray; The pressing frame body is arranged vertically through the entire structure. The movable tray is used to support the filter cloth and can be vertically and movably installed in the pressing frame body to move the filter cloth to the top opening.

8. The pressing system according to claim 7, characterized in that, The pressing system also includes a lifting platform, which is located at the fabric feeding station of the first longitudinal rail; The size of the lifting platform is configured to be smaller than the bottom opening of the pressing frame body so that the lifting platform can extend into the pressing frame body and drive the movable pallet to move vertically.

9. The pressing system according to claim 1, characterized in that, The first pressurizing device includes a first press and a first frame. The first frame is located above the annular track. The first press is mounted on the first frame and is used to apply pressure to the material in the pressing frame at a first preset pressure. And / or, the second pressurizing device includes a second press and a second frame, the second frame being disposed above the annular track, the second press being mounted on the second frame and used to apply pressure to the material in the pressing frame at a second preset pressure.

10. The pressing system according to claim 9, characterized in that, The first press and / or the second press are constructed as hydraulic presses, pneumatic presses or mechanical presses.

Images