Plate-and-frame filter press

Abstract

The invention provides a plate-and-frame filter press, and belongs to the technical field of plate-and-frame filter presses. Comprising a filter press body, the driving assembly has reciprocating displacement along the length direction of the filter press body; the scraper assembly is connected to the filter press body in a sliding manner; the scraper assembly at least comprises a scraper; an included angle a is formed between the scraper and the gravity direction; the included angle a is increased or decreased according to the weight b of the filter cake; the moving distance L of the previous plate frame driven by the driving assembly is increased or decreased under the control of the weight b of the filter cake. The included angle of the scraping plates is adjusted according to the weight of a filter cake, smooth stripping of the filter cake is ensured, particularly, the filter cake with high water content and high weight can be scraped cleanly, residues are avoided, and abrasion of equipment is reduced by reducing unnecessary displacement distance and reducing friction between the guide rail and the plate frame.

Description

Technical Field

[0001] The invention relates to a plate and frame filter press, belonging to the technical field of plate and frame filter presses, and in particular to a plate and frame filter press capable of adaptively adjusting a scraper angle for filter cakes of different weights to ensure that the filter cakes are scraped cleanly. Background Art

[0002] Plate and frame filter press is a solid-liquid separation equipment, which is widely used in chemical, pharmaceutical, metallurgical, food and other industries, especially in sewage treatment and sludge dehydration. The working principle of the equipment is to make the filtrate pass through the filter cloth by pressure, while the solid particles remain on the filter cloth to form a filter cake, thus achieving solid-liquid separation.

[0003] The basic structure of the plate and frame filter press includes filter plates, filter frames, filter cloths and clamping devices. Its working process is mainly divided into four stages: Feeding stage: The suspension to be treated is transported to the filter chamber through the feed pump, and the solid particles in the suspension are gradually accumulated on the filter cloth.

[0004] Filtration stage: The liquid in the suspension passes through the filter cloth under pressure, and the solid particles are trapped on the filter cloth to form a filter cake. The liquid part flows out through the channel of the filter plate.

[0005] Pressing stage: Some plate and frame filter presses are equipped with a pressing device, which can further compress the filter cake, reduce its moisture content and improve separation efficiency.

[0006] Cake unloading stage: After the filtration is completed, open the filter plate and unload the filter cake to complete the entire separation process.

[0007] The advantages of plate and frame filter press are simple structure, easy operation and strong adaptability. It is suitable for processing suspensions with high solid content and the filter cake has low moisture content.

[0008] However, the existing plate and frame filter press has some technical problems during use. For example, in sludge treatment, the filter residue is often too wet or contains too much flocculant, resulting in a high viscosity of the filter cake, which is easy to adhere to the filter screen of the frame plate and difficult to fall off smoothly. In addition, in order to ensure that the filter cake does not contaminate the adjacent frame plates when it falls off, the prior art usually pulls two adjacent frame plates apart by a certain distance so that the filter residue can fall smoothly. However, this method of pulling apart a large distance causes the frame plates to move a long distance, causing increased wear on the equipment. Since the frame plates are usually narrow, the frame plates may become stuck during long-distance movement, further affecting the normal operation and service life of the equipment. Summary of the invention

[0009] Based on this, it is necessary to provide a plate and frame filter press to address the problem that the filter cake is difficult to fall off in the current plate and frame filter press.

[0010] The above purpose is achieved through the following technical solutions: A plate and frame filter press, comprising: Filter press body; A driving assembly having a reciprocating movement along the length direction of the filter press body; A scraper assembly, slidably connected to the filter press body; The scraper assembly is controlled by the first travel section of the reciprocating displacement of the driving assembly to move toward the target plate frame and contact the target plate frame; The preceding plate frame of the target plate frame is controlled by the second travel section of the reciprocating displacement of the driving assembly to move away from the target plate frame and separate from the target plate frame; Wherein, the scraper assembly at least comprises a scraper; Furthermore, the scraper has an angle a with the gravity direction; The size of the angle a is controlled by the weight b of the filter cake and increases or decreases; Furthermore, the moving distance L of the previous plate frame driven by the driving component is increased or decreased according to the weight b of the filter cake.

[0011] In one embodiment, the frame has: first side and second side; Wherein, the first surface is provided with a first filter plate assembly; Wherein, the second surface is provided with a second filter plate assembly; The first filter plate assembly and the second filter plate assembly have a filter pressing state and a material discharging state; The filter pressing state is configured as follows: the adjacent plate frames are coupled so that the first filter plate assembly and the second filter plate assembly enclose a filter pressing cavity; The unloading state is configured as follows: the first filter plate assembly and the second filter plate assembly are separated; Furthermore, the scraper plate assembly is in contact with the first filter plate assembly.

[0012] In one embodiment, the first filter plate assembly comprises: A first filter plate, one end of which is rotatably connected to the plate frame; A winding member connected between the first filter plate and the plate frame; The winding member is configured to allow the first filter plate to move along the gravity direction when the first filter plate is subjected to the weight b of the filter cake; and to restore the first filter plate to an initial position when the first filter plate is not subjected to the weight b of the filter cake; A detection member, the detection member is configured to: detect the deformation force exerted on the winding member by the weight b of the filter cake, and transmit the deformation force to the driving assembly; The moving distance L of the driving component is negatively correlated with the weight b of the filter cake.

[0013] In one embodiment, the second filter plate assembly comprises: A second filter plate is fixedly disposed on the plate frame; A sealing member, enclosing the circumference of the second filter plate; Wherein, the second filter plate protrudes in a direction perpendicular to the plate frame; And, the first filter plate is recessed in a direction perpendicular to the plate frame.

[0014] In one embodiment, the scraper assembly comprises: A displacement member, slidably connected to the filter press body; The displacement member is controlled by the first travel section of the reciprocating displacement of the driving assembly to move toward the target plate frame; A linkage member, disposed on the displacement member and meshingly connected with the driving assembly; a first adjusting member connected to the linkage member and hinged to the scraper; a second adjusting member, hinged to the scraper; Wherein, the linkage member is controlled by the moving distance L of the driving assembly, and drives the first adjusting member toward or away from the second adjusting member to adjust the angle a of the scraper; Wherein, the first adjusting member and the second adjusting member have a reciprocating displacement along the direction of gravity; Wherein, the angle a of the scraper is negatively correlated with the weight b of the filter cake.

[0015] In one embodiment, the drive assembly comprises: A driving body, slidably connected to the filter press body; A clamping claw, disposed on the driving body; A stop block, arranged on a side wall surface of the driving body; The stopping block is configured to contact the displacement member.

[0016] In one embodiment, it includes: Meshing part one and meshing part two; Wherein, the meshing portion is arranged on the side wall surface of the driving body; Wherein, the meshing second part is one of the structures of the linkage member; Furthermore, at least when the driving body is displaced by the moving distance L, the first meshing portion and the second meshing portion are meshingly connected.

[0017] In one embodiment, the frame comprises: A variable volume cavity is formed between the first filter plate assembly and the second filter plate assembly; The side wall surface of the variable volume cavity is deformed by the intervention of a high-pressure gas and contacts the first filter plate assembly and the second filter plate assembly.

[0018] In one embodiment, it includes: The sewage enters the pipeline and is communicated with the filter press cavity enclosed by the first filter plate and the second filter plate of each adjacent plate frame; The clean water discharge pipeline is communicated with the clean water cavities on both sides of each of the filter press cavities.

[0019] In one embodiment, it also includes: frame; A total driving device is arranged at one end of the frame; Wherein, the total driving device drives the plurality of plate frames to form a pressing connection.

[0020] The beneficial effects of the present invention are: The angle of the scraper of the present invention is adjusted according to the weight of the filter cake, so as to ensure smooth stripping of the filter cake, especially the filter cake with high water content and high weight can be scraped off cleanly to avoid residue.

[0021] The drive assembly adjusts the moving distance of the plate frame according to the weight of the filter cake, reducing the problem of the plate frame getting stuck due to excessive movement, and ensuring the long-term stable operation of the equipment. By reducing unnecessary displacement distance, the friction between the guide rail and the plate frame is reduced, the wear of the equipment is reduced, and the working efficiency and service life of the filter press are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 One of the three-dimensional diagrams of a plate and frame filter press according to an embodiment of the present invention; Figure 2 The second is a three-dimensional diagram of a plate and frame filter press according to an embodiment of the present invention; Figure 3 for Figure 2 A local enlarged schematic diagram of the structure shown at position A; Figure 4 for Figure 2 A partial enlarged schematic diagram of the structure shown at position B; Figure 5 A side view of a plate and frame filter press according to an embodiment of the present invention; Figure 6 for Figure 5A cross-sectional view of the structure shown along the AA direction; Figure 7 for Figure 6 A partial enlarged schematic diagram of the structure shown at position C; Figure 8 A front view of a plate and frame filter press according to an embodiment of the present invention; Fig. 9 for Figure 8 The structure shown is a cross-sectional view along the BB direction.

[0023] in: 1. Driving assembly; 101. Driving body; 102. Engaging claw; 103. Stop block; 2. Scraper assembly; 201. Scraper; 202. Displacement member; 203. Linkage member; 204. First adjustment member; 205. Second adjustment member; 3. First filter plate assembly; 301. First filter plate; 302. Detection member; 4. Second filter plate assembly; 401. Second filter plate; 402. Sealing member; 5. Filter press chamber; 6. Plate frame; 701. Engaging part one; 702. Engaging part two; 8. Variable volume chamber; 901. Gas pipeline; 902. Sewage inlet pipeline; 903. Clean water outlet pipeline; 10. Frame; 1001. Sliding guide rail; 11. Main driving device; 12. Sealing plate; 13. Assembly panel. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] like Figure 1 to Figure 2 As shown, the first embodiment of the present invention provides a plate and frame filter press, comprising: Filter press body; The driving assembly 1 has the function of reciprocating displacement along the length direction of the filter press body; The scraper assembly 2 is slidably connected to the filter press body; The scraper assembly 2 is controlled by the first travel section of the reciprocating displacement of the driving assembly 1, and moves toward the target plate frame 6 and contacts the target plate frame 6; The preceding plate frame 6 of the target plate frame 6 is controlled by the second travel section of the reciprocating displacement of the driving assembly 1, and moves away from the target plate frame 6 and separates from the target plate frame 6; Wherein, the scraper assembly 2 at least includes a scraper 201; Moreover, the scraper 201 has an angle a with the gravity direction; The size of the angle a is controlled by the weight b of the filter cake and increases or decreases; Furthermore, the moving distance L of the previous plate frame 6 driven by the driving assembly 1 is increased or decreased according to the weight b of the filter cake.

[0028] In this embodiment, an optimized scraper assembly 2 and drive assembly 1 are designed to address the problems of increased weight of the filter cake due to increased water content of the filter cake, difficulty in peeling the filter cake, and easy jamming of the plate frame 6 during movement.

[0029] When the water content of the filter cake increases, the weight b of the filter cake also increases. Heavier filter cakes are difficult to peel off from the filter screen due to their enhanced adhesion. At the same time, filter cakes with high water content are prone to contaminating adjacent filter screens, resulting in low unloading efficiency.

[0030] In order to solve the above problems, the key design of the scraper assembly 2 is to make the angle a of the scraper 201 correlated with the weight b of the filter cake. The specific optimization measures are: The heavier the filter cake, the smaller the angle a of the scraper 201. When the weight of the filter cake increases, the angle of the scraper 201 is adjusted to be closer to parallel to the filter screen, which increases the contact area between the scraper 201 and the filter cake.

[0031] The contact area between the scraper 201 and the filter cake surface directly affects the effect of scraping the filter cake. By adjusting the angle a of the scraper 201 to a smaller angle, the scraper 201 can act on the heavier filter cake with a higher water content with a larger contact area, so that a more uniform force is distributed on the filter cake surface. This smaller angle a effectively increases the friction between the scraper 201 and the filter cake, enhances the scraping effect, and ensures that even filter cakes with high water content can be scraped off smoothly.

[0032] In addition, the smaller angle a reduces the reaction force of the filter cake on the scraper 201, reduces the possibility of the filter cake rebounding back to the filter screen, and further ensures that the filter cake is completely removed to avoid contamination of adjacent filter screens.

[0033] On the other hand, when the weight of the filter cake increases, the prior art usually needs to increase the moving distance between the plate frame 6 to ensure that the filter cake falls off smoothly. However, a longer moving distance may cause the plate frame 6 to get stuck or move unsmoothly, increase the wear of the equipment, and affect the working efficiency of the equipment.

[0034] In order to solve the above problem, the driving assembly 1 in this embodiment makes the moving distance L of the plate frame 6 form a correlation relationship with the weight b of the filter cake: The heavier the filter cake, the smaller the moving distance L. When the weight of the filter cake increases, the shorter moving distance can prevent the plate frame 6 from deflecting or getting stuck in the long moving path. This is because the heavier filter cake has greater inertia. If the plate frame 6 moves too long, the filter cake is likely to deflect due to gravity, causing the guide rails or moving parts of the plate frame 6 to get stuck or run unstably.

[0035] By reducing the moving distance L, the stability of the plate frame 6 during the moving process can be maintained and the wear of the equipment can be reduced. At the same time, the appropriate moving distance can also provide enough space for the filter cake to fall smoothly, thereby ensuring the unloading efficiency. In addition, the optimization of the moving distance can also reduce the energy consumption of the equipment, because too long a moving distance will increase the power burden, especially under a large filter cake load.

[0036] This embodiment effectively solves the technical problem caused by the increase of filter cake water content by dual optimization of the scraper assembly 2 and the drive assembly 1. The specific technical effects are summarized as follows: Efficient removal of filter cake: The angle a of the scraper 201 is adjusted according to the weight of the filter cake to ensure smooth stripping of the filter cake, especially the filter cake with high water content and high weight can be scraped off cleanly to avoid residue.

[0037] The plate frame 6 runs stably: the driving component 1 adjusts the moving distance of the plate frame 6 according to the weight of the filter cake, which reduces the jamming problem of the plate frame 6 caused by excessive movement and ensures the long-term stable operation of the equipment.

[0038] Reduce wear and extend service life: By reducing unnecessary displacement distance, the friction between the guide rail and the plate frame 6 is reduced, the wear of the equipment is reduced, and the working efficiency and service life of the filter press are improved.

[0039] In a specific implementation, the filter press body can be a filter press in the prior art. This embodiment focuses on providing optimization of the drive assembly 1 and the scraper assembly 2 .

[0040] In a specific embodiment, the scraper assembly 2 needs to be adjusted to the position of the target plate frame 6, and the plate frame 6 preceding the target plate frame 6 is driven by the driving assembly 1 so that the two are separated and the filter cake is exposed.

[0041] In a specific embodiment, the driving assembly 1 can be reciprocated along the length direction of the filter press body, wherein in the first stroke section, the driving assembly 1 moves toward the plate frame 6, and at this time pushes the scraper assembly 2 to move toward the target plate frame 6. In the second stroke section, the driving assembly 1 moves away from the plate frame 6, and drives the plate frame 6 before the target plate frame 6 to move.

[0042] like Figures 1 to 6 As shown, the second embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the plate frame 6 has: first side and second side; Wherein, the first surface is provided with a first filter plate assembly 3; Wherein, the second surface is provided with a second filter plate assembly 4; The first filter plate assembly 3 and the second filter plate assembly 4 have a filter pressing state and a material discharging state; The filter pressing state is configured as follows: adjacent plate frames 6 are coupled so that the first filter plate assembly 3 and the second filter plate assembly 4 enclose a filter pressing chamber 5; The unloading state is configured as follows: the first filter plate assembly 3 and the second filter plate assembly 4 are separated; Furthermore, the scraper plate assembly 2 is in contact with the first filter plate assembly 3 .

[0043] In this embodiment, the structural design of the filter plate assembly and the scraper assembly 2 is further optimized to enhance the filtration effect and discharge efficiency of the equipment.

[0044] The first filter plate assembly 3 and the second filter plate assembly 4 are in a filter pressing state during the filter pressing process. In this state, the adjacent plate frames 6 are tightly connected by coupling, so that the first filter plate assembly 3 and the second filter plate assembly 4 of the adjacent plate frame 6 are enclosed together to form a filter pressing cavity 5. The cavity is used to accommodate the filtered suspension and achieve solid-liquid separation. Through this design, the filter pressing cavity 5 formed between the plate frames 6 can provide an effective filtering space to ensure the formation and compression of the filter cake.

[0045] After the filtration is completed, the first filter plate assembly 3 and the second filter plate assembly 4 enter the unloading state, that is, the two are separated and the pressing state is released. Through the control of the drive assembly 1, the plate frames 6 are separated from each other, providing sufficient space for the unloading of the filter cake. In this state, the scraper assembly 2 can smoothly contact the first filter plate assembly 3 to scrape off the filter cake.

[0046] The first filter plate assembly 3 and the second filter plate assembly 4 form an effective filter pressing cavity 5 in the filter pressing state, ensuring the formation and compression of the filter cake during the filter pressing process, and effectively improving the solid-liquid separation efficiency.

[0047] Smooth unloading of filter cake: In the unloading state, the separation of the filter plate assembly provides a good working space for the scraper 201, ensuring that the filter cake can be removed smoothly and reducing the filter cake residue. The cooperation between the scraper assembly 2 and the first filter plate assembly 3 prevents the filter cake from adhering to the adjacent plate frame 6 during the unloading process, ensuring the cleanliness after unloading.

[0048] The first surface and the second surface refer to two end surfaces facing away from each other of the plate frame 6. The first surface and the second surface of adjacent plate frames 6 face each other, that is, the first filter plate assembly 3 and the second filter plate assembly 4 face each other.

[0049] like Figure 6 to Figure 7 As shown, the third embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the first filter plate assembly 3 includes: The first filter plate 301 has one end rotatably connected to the plate frame 6; A winding member connected between the first filter plate 301 and the plate frame 6; The winding member is configured to allow the first filter plate 301 to move along the gravity direction when it is subjected to the weight b of the filter cake; and to restore the first filter plate 301 to its initial position when it is not subjected to the weight b of the filter cake; A detection member 302, the detection member 302 is configured to: detect the deformation force exerted on the winding member by the weight b of the filter cake, and transmit it to the driving assembly 1; The moving distance L of the driving component 1 is negatively correlated with the weight b of the filter cake.

[0050] In this embodiment, the design of the first filter plate assembly 3 is further optimized so that it can better adapt to filter cakes of different weights, and the precise control and operation optimization of the equipment can be achieved by detecting the weight of the filter cakes.

[0051] Specifically, one end of the first filter plate 301 is rotatably connected to the plate frame 6. This design allows the first filter plate 301 to flexibly move with the filter cake weight b when the filter cake is loaded. Such a rotatable connection method helps the filter plate to bear a heavier filter cake during the filtration process while maintaining the stability and reliability of the filter plate.

[0052] This embodiment introduces a take-up member, which is installed between the first filter plate 301 and the plate frame 6. The function of the take-up member is to allow the first filter plate 301 to be displaced in the direction of gravity due to the weight b of the filter cake when the filter cake is loaded, and the take-up member is deformed in the process. The degree of deformation is directly related to the weight of the filter cake and generates corresponding deformation force. After the filter cake is unloaded, the take-up member can restore the first filter plate 301 to its initial position, that is, to the equilibrium state when it is not affected by the weight of the filter cake, and prepare for the next filter pressing cycle.

[0053] The detection member 302 is used to monitor the deformation force of the winding member in real time. Through the deformation of the winding member, the detection member 302 can obtain the weight b of the filter cake. The detection of the filter cake weight is crucial to the operation of the drive component 1, because the moving distance L of the drive component 1 is negatively correlated with the weight b of the filter cake. Through the feedback of the detection member 302, the drive component 1 can automatically adjust the moving distance of the plate frame 6 according to the weight of the filter cake. Specifically: The greater the filter cake weight b, the smaller the moving distance L of the driving assembly 1. This design can prevent the plate frame 6 from getting stuck or moving poorly during movement, especially when the filter cake is heavy, the shorter moving distance can better maintain the smooth operation of the plate frame 6 and reduce the wear of the equipment.

[0054] Through the deformation of the winding member, the detection member 302 can effectively sense the weight b of the filter cake and transmit it to the driving component 1 for control. In this way, accurate detection of the filter cake weight and adaptive adjustment of the equipment can be achieved, thereby improving the intelligent level of the filter pressing process.

[0055] And by detecting the weight of the filter cake and adjusting the moving distance L of the driving assembly 1, the jamming phenomenon caused by the plate frame 6 moving too long when the filter cake is too heavy is effectively prevented. At the same time, the shorter moving distance also reduces the friction between the plate frame 6 and the guide rail, reduces the wear of the equipment, and prolongs the service life of the equipment.

[0056] The first filter plate 301 can adapt to filter cakes of different weights by adjusting the winding member, making the filter cakes smoother during the unloading process. The deformation of the winding member reflects the weight of the filter cake, helping the detection member 302 to accurately feedback data, and then the driving component 1 controls the moving distance to ensure a more efficient unloading process.

[0057] In a specific embodiment, the first filter plate 301 is of a rolling curtain type and is rotatably connected to the plate frame 6 via a rotating shaft. A torsion spring, i.e., a winding member, and a torque sensor, i.e., a detection member 302, are installed on the rotating shaft. The torque sensor can be installed on the rotating shaft to detect the torque change generated by the torsion spring when the rolling curtain filter plate is subjected to force. The torque is directly related to the deformation of the torsion spring. The change in torque can reflect the weight b of the filter cake, thereby indirectly calculating the weight of the filter cake by detecting the torque. This design can monitor the stress of the torsion spring in real time and accurately feedback the force of the filter cake on the filter plate.

[0058] like Figures 6 to 7 As shown, the fourth embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the second filter plate assembly 4 includes: The second filter plate 401 is fixedly mounted on the plate frame 6; The sealing member 402 is enclosed around the second filter plate 401; Wherein, the second filter plate 401 protrudes in a direction perpendicular to the plate frame 6; Furthermore, the first filter plate 301 is recessed in a direction perpendicular to the plate frame 6 .

[0059] In this embodiment, the sealing performance and filter cake forming effect during the filter pressing process are enhanced by further optimizing the design of the second filter plate assembly 4 .

[0060] Specifically, the second filter plate 401 is fixedly mounted on the plate frame 6 as a stable filter pressing structure. Due to the fixed installation of the second filter plate 401, a stronger supporting force can be provided during the filter pressing process, ensuring that the filter plate can remain stable when subjected to high pressure, avoiding displacement or deformation of the filter plate, and ensuring the filter pressing effect.

[0061] A seal 402 is provided around the circumference of the second filter plate 401, and its function is to form a closed space during the filter pressing process to prevent the filter pressing liquid from leaking from the gap between the plate frame 6. The seal 402 can ensure that the first filter plate 301 and the second filter plate 401 are tightly combined during the filter pressing, which not only improves the sealing of the filter pressing cavity 5, but also can improve the filtering efficiency under high pressure environment and prevent the liquid from leaking to the external environment.

[0062] The second filter plate 401 protrudes in a direction perpendicular to the plate frame 6, and the protruding design provides additional compression space for the filter cake. The protruding part forms a sealed cavity with the first filter plate 301 during the filter pressing process, which can increase the pressure area during the filter pressing, making the filter cake more compact during the compression process and reducing the water content.

[0063] The first filter plate 301 is concave in a direction perpendicular to the plate frame 6, which matches the protruding structure of the second filter plate 401. During filtration, the concave first filter plate 301 can better accommodate and fix the filter cake, ensuring that the filter cake will not be displaced when under pressure, further improving the molding effect and quality of the filter cake.

[0064] On the other hand, the concave design of the first filter plate 301 cooperates with the convex design of the second filter plate 401 to provide a stronger compression force for the filter cake during the filtration process. This design helps the filter cake to be uniformly formed under high pressure, reduce the moisture content of the filter cake, increase its density, and thus improve the quality of the filter cake.

[0065] Moreover, the concave first filter plate 301 can make the filter cake stay on the filter plate more stably during the unloading process, preventing the filter cake from shifting due to vibration or movement during the unloading process. This stability improves the efficiency of unloading and enables the scraper assembly 2 to scrape the filter cake more effectively.

[0066] In one specific embodiment, the sealing member 402 is an elastic sealing strip.

[0067] like Figures 2 to 9 As shown, the fifth embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the scraper assembly 2 includes: The displacement member 202 is slidably connected to the filter press body; The displacement member 202 is controlled by the first travel section of the reciprocating displacement of the driving assembly 1 and moves toward the target plate frame 6; The linkage member 203 is disposed on the displacement member 202 and is meshed with the driving assembly 1; A first adjusting member 204 is connected to the linkage member 203 and is hinged to the scraper 201; The second adjusting member 205 is hinged to the scraper 201; The linkage member 203 is controlled by the moving distance L of the driving assembly 1, and drives the first adjusting member 204 toward or away from the second adjusting member 205 to adjust the angle a of the scraper 201; Wherein, the first adjusting member 204 and the second adjusting member 205 have a reciprocating displacement along the direction of gravity; The angle a of the scraper 201 is negatively correlated with the weight b of the filter cake.

[0068] In this embodiment, the structural design of the scraper assembly 2 is mainly improved to achieve adaptive adjustment of the angle of the scraper 201, thereby improving the filter cake removal efficiency and the intelligent control level of the equipment.

[0069] Specifically, the displacement member 202 is slidably connected to the filter press body of the filter press, and is used to support and drive the scraper assembly 2 to move during operation. The sliding of the displacement member 202 is controlled by the drive assembly 1, and plays a key role in the reciprocating displacement of the drive assembly 1.

[0070] like Figures 6 to 9 As shown, the linkage member 203 is disposed on the displacement member 202 and is meshed with the drive assembly 1. When the moving distance L of the drive assembly 1 changes, the linkage member 203 responds to the change and controls the adjustment member connected thereto to adjust the angle a of the scraper 201. Specifically, the linkage member 203 can automatically adjust the angle a of the scraper 201 according to the weight b of the filter cake through a transmission mechanism, thereby realizing adaptive adjustment of the scraper 201.

[0071] The first adjusting member 204 is connected to the linkage member 203 and is hinged to the scraper 201. The first adjusting member 204 is responsible for controlling the angle a of the scraper 201. The second adjusting member 205 is also hinged to the scraper 201 to support and adjust the angle a of the scraper 201.

[0072] Through the coordinated work of the first adjusting member 204 and the second adjusting member 205 , the angle a of the scraper 201 can be flexibly adjusted as the weight of the filter cake changes.

[0073] In this embodiment, the angle a of the scraper 201 is negatively correlated with the weight b of the filter cake: The heavier the filter cake, the smaller the angle a. When the filter cake weight b increases, the angle of the scraper 201 automatically decreases, making the scraper 201 closer to the vertical position. This design can increase the contact area between the scraper 201 and the filter cake, ensuring that the filter cake can be effectively scraped off, especially when the filter cake is heavy and has a high water content.

[0074] During the operation of the equipment, the driving component 1 drives the displacement member 202 to move back and forth. In the first stroke section, the displacement member 202 drives the scraper assembly 2 to move toward the target plate frame 6 and contact the filter cake. In this process, the linkage member 203 automatically adjusts the angle a of the scraper 201 according to the moving distance L of the driving component 1 to ensure that the scraper 201 contacts the filter cake at the optimal angle a.

[0075] By automatically adjusting the angle a of the scraper 201, this embodiment can ensure that the scraper 201 can work at the optimal angle a when processing filter cakes of different weights, which significantly improves the filter cake removal efficiency. In particular, when the filter cake weight is large, the angle a of the scraper 201 is reduced, which can more efficiently scrape the filter cake.

[0076] The design of automatically adjusting the angle a of the scraper 201 effectively prevents the filter cake from remaining on the filter plate during the unloading process, thus avoiding the influence on the subsequent filter pressing process. By optimizing the control of the angle a of the scraper 201, the unloading is cleaner and more thorough.

[0077] In one specific embodiment, the displacement member 202 is a slidable frame structure.

[0078] In a specific embodiment, the linkage member 203 includes a first rotating rod, a second rotating rod and a displacement seat, wherein the first rotating rod is meshedly connected with the driving assembly 1 .

[0079] Specifically, when the driving assembly 1 drives the displacement member 202 to move toward the plate frame 6, that is, in the first stroke section, the linkage member 203 drives the first adjustment member 204 toward the second adjustment member 205 until the first adjustment member 204 and the second adjustment member 205 are close to the minimum distance. At this time, the direction of the scraper 201 approaches the vertical direction, that is, the angle a approaches 0°. However, when the driving assembly 1 drives the previous plate frame 6 to move, that is, in the second stroke section, the position of the displacement member 202 is fixed at this time, but because the linkage member 203 and the driving assembly 1 form a meshing connection, when the driving assembly 1 moves the moving distance L, the linkage member 203 drives the first adjustment member 204 to move away from the second adjustment member 205, and the distance between the two increases, thereby driving the angle a to gradually increase from approaching 0°. In other words, the larger the moving distance L, the larger the distance between the first adjustment member 204 and the second adjustment member 205, and the larger the value of the angle a. On the contrary, the smaller the moving distance L is (corresponding to the larger filter cake weight b), the smaller the distance between the first adjusting member 204 and the second adjusting member 205 is, and the smaller the value of the angle a is.

[0080] Furthermore, the linkage member 203 includes a first rotating rod, a second rotating rod and a displacement seat.

[0081] Wherein, the first rotating rod has gears at both ends, and the gear at one end is meshed with the driving assembly 1 (for example, a rack is installed on the side wall of the driving assembly 1), the second rotating rod has umbrella wheels at both ends, and the umbrella wheel at one end is meshed with the gear at the other end of the first rotating rod, the umbrella wheel at the other end of the second rotating rod is meshed with the displacement seat (the displacement seat is slidably connected and has a tooth surface meshed with the umbrella wheel), and the first adjusting member 204 is connected with the displacement seat. When the driving assembly 1 is displaced in the first stroke section, the rack on the side wall of the driving assembly 1 moves in the direction toward the plate frame 6, and is meshed with the gear at one end of the first rotating rod, so that the first rotating rod is rotated, and then the gear at the other end of the first rotating rod and the umbrella wheel at one end of the second rotating rod are used to rotate the second rotating rod, and finally the umbrella wheel at the other end of the second rotating rod is used to move the displacement seat toward the second adjusting member 205 through the tooth surface of the displacement seat, that is, the first adjusting member 204 moves toward the second adjusting member 205. On the contrary, when the driving component 1 is displaced in the second stroke segment, the rack on the side wall of the driving component 1 moves in the direction toward the plate frame 6, and engages with the gear at one end of the first rotating rod, thereby causing the first rotating rod to rotate (at this time, the rotation direction of the first rotating rod is opposite to the rotation direction of its first stroke segment), and then through the gear at the other end of the first rotating rod and the umbrella-shaped wheel at one end of the second rotating rod, the second rotating rod is caused to rotate (at this time, the rotation direction of the second rotating rod is opposite to the rotation direction of its first stroke segment), and finally the umbrella-shaped wheel at the other end of the second rotating rod passes through the tooth surface of the displacement seat, causing the displacement seat to move away from the second adjusting member 205, that is, the first adjusting member 204 moves away from the second adjusting member 205.

[0082] In a specific embodiment, the first adjusting member 204 is a telescopic rod, and the second adjusting member 205 is a telescopic rod, and can be actively extended and retracted to drive the scraper 201 to perform the filter cake scraping process.

[0083] like Figure 3 As shown, the sixth embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the driving assembly 1 includes: The driving body 101 is slidably connected to the filter press body; The engaging claw 102 is disposed on the driving body 101; The stopper 103 is disposed on the side wall of the driving body 101; The stopping block 103 is configured to contact the displacement member 202 .

[0084] In this embodiment, the structure of the driving assembly 1 is mainly improved to enhance the stability and control accuracy of the equipment operation.

[0085] Specifically, the driving body 101 is slidably connected to the filter press body. Through the sliding connection, the driving body 101 can move smoothly on the track of the filter press body, ensuring that various components of the system work in coordination.

[0086] The engaging claw 102 is disposed on the driving body 101 , and can engage with and release the plate frame 6 during the movement of the driving body 101 , thereby allowing the plate frame 6 to move at an appropriate time and position.

[0087] The stopper 103 is mounted on the side wall of the driving body 101 and is used to contact the displacement member 202 and push the displacement member 202 to move. The stopper 103 pushes the displacement member 202 to slide along a predetermined path by contacting the displacement member 202, thereby realizing the movement of the scraper assembly 2.

[0088] In a specific embodiment, the driving body 101 is a hydraulic driving system, which realizes the precise movement and filter pressing operation of the plate frame 6 through the reciprocating motion of the hydraulic cylinder. The hydraulic driving system is mainly composed of a hydraulic cylinder, a hydraulic pump, a hydraulic valve, etc. The hydraulic pump provides power to the hydraulic cylinder to push the piston rod of the hydraulic cylinder to reciprocate back and forth.

[0089] In a specific embodiment, the engaging claw 102 includes a pair of claw bodies with the same structure, and the claw bodies are connected to the driving body 101 through springs. The gap formed between the claw bodies is used to engage the plate frame 6.

[0090] A seventh embodiment of the present invention provides a plate and frame filter press, and based on the above embodiment, comprises: A meshing part 701 and a meshing part 2 702; The engaging portion 701 is disposed on the side wall surface of the driving body 101; The second meshing portion 702 is one of the structures of the linkage member 203; Furthermore, at least when the driving body 101 is displaced by a moving distance L, the first meshing portion 701 and the second meshing portion 702 are meshed and connected.

[0091] The meshing second part 702 is a gear structure, which is part of the linkage 203. The gear is tightly meshed with the rack, and the linear motion of the driving body 101 can be converted into the rotational motion of the linkage 203 through the rotation of the gear, ensuring that the movement of the linkage 203 is synchronized with the displacement of the driving body 101.

[0092] In this embodiment, the meshing portion 701 is a rack structure, which is disposed on the side wall of the driving body 101. The design of the rack can keep synchronous meshing with the gear in the linkage member 203 when the driving body 101 moves a distance L, thereby ensuring that the movement of the driving body 101 can be accurately transmitted to the linkage member 203 to control the movement of subsequent components.

[0093] When the driving body 101 is displaced, the rack and the gear are precisely meshed, so that the displacement of the driving body 101 can be transmitted to the linkage member 203 through the rack. The gear rotates during the meshing process, and the movement of the linkage member 203 drives the first adjustment member 204 to adjust the angle a of the scraper 201.

[0094] like Figure 7 As shown, the eighth embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, the plate frame 6 comprises: The variable volume cavity 8 is formed between the first filter plate assembly 3 and the second filter plate assembly 4; The side wall surface of the variable volume cavity 8 is deformed by the intervention of a high-pressure gas and contacts the first filter plate assembly 3 and the second filter plate assembly 4 .

[0095] In this embodiment, a variable volume cavity 8 is introduced on the plate frame 6 to achieve dynamic changes in the cavity through the intervention of high-pressure gas, thereby improving the filter pressing effect.

[0096] The variable volume cavity 8 is arranged between the first filter plate assembly 3 and the second filter plate assembly 4. As a cavity with adjustable volume, the variable volume cavity 8 can deform under the action of high pressure gas, thereby adjusting the volume inside the cavity. This design provides additional adjustment space for the formation and compression of filter cakes during the filter pressing process.

[0097] The side wall of the variable volume cavity 8 is deformed by the intervention of high-pressure gas. Specifically, when the high-pressure gas enters the variable volume cavity 8, the side wall will expand, thereby changing the volume of the cavity. The volume change of the cavity enables the first filter plate assembly 3 and the second filter plate assembly 4 to better contact and press the filter cake, thereby improving the solid-liquid separation effect during the filter press process. After the high-pressure gas enters the cavity, the volume of the variable volume cavity 8 increases, and the side wall is tightly attached between the first filter plate 301 and the second filter plate 401. At this time, the volume change of the variable volume cavity 8 causes the filter cake between the filter plates to be subjected to a greater compression force, the moisture content of the filter cake is reduced, and the separation effect is more significant.

[0098] When the filter pressing process is completed, the gas is gradually released, the volume of the variable volume cavity 8 returns to its original state, the pressure between the filter plates decreases, and the cavity becomes smaller, providing space for the subsequent filter cake unloading.

[0099] In a specific embodiment, a gas pipeline 901 is provided, and the gas pipeline 901 is connected to each variable volume cavity 8 .

[0100] A ninth embodiment of the present invention provides a plate-frame filter press, and based on the above embodiment, comprises: The sewage enters the pipeline 902 and communicates with the filter press chamber 5 enclosed by the first filter plate 301 and the second filter plate 401 of each adjacent plate frame 6; The purified water discharge pipeline 903 is connected to the purified water chambers on both sides of each filter press chamber 5 .

[0101] In this embodiment, the sewage inlet pipeline 902 is used for sewage to enter each filter press chamber 5. The clean water outlet pipeline 903 is used for the discharge of clean water after squeezing.

[0102] like Figure 1 to Figure 2 As shown, the tenth embodiment of the present invention provides a plate and frame filter press, and on the basis of the above embodiment, further comprises: Rack 10; The main driving device 11 is arranged at one end of the frame 10; The main driving device 11 drives the plurality of plate frames 6 to form a pressed connection.

[0103] In this embodiment, the frame 10 has a sliding guide rail 1001 for sliding installation of the driving assembly 1, the plate frame 6 and the scraper assembly 2.

[0104] The main driving device 11 is a pneumatic cylinder or a hydraulic cylinder to apply force to the plurality of plate frames 6 and press them together.

[0105] A sealing plate 12 is provided at the end of the main driving device 11 , and the main driving device 11 applies a force to the plurality of plate frames 6 through the sealing plate 12 .

[0106] There is also a general assembly panel 13, which is installed at one end of the frame 10 away from the main drive device 11 and is fixedly connected. The inlets of the sewage inlet pipeline 902, the gas pipeline 901 and the clean water outlet pipeline 903 can all be opened on the general assembly panel 13.

[0107] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A plate and frame filter press, characterized in that: include: Filter press body; A driving assembly (1) having the ability to move back and forth along the length direction of the filter press body; A scraper assembly (2) slidably connected to the filter press body; The scraper assembly (2) is controlled by the first travel section of the reciprocating displacement of the drive assembly (1) to move toward the target plate frame (6) and contact the target plate frame (6); The preceding plate frame (6) of the target plate frame (6) is controlled by the second travel section of the reciprocating displacement of the driving component (1) to move away from the target plate frame (6) and separate from the target plate frame (6); Wherein, the scraper assembly (2) comprises at least a scraper (201); Furthermore, the scraper (201) has an angle a with the gravity direction; The size of the angle a is controlled by the weight b of the filter cake and increases or decreases; Furthermore, the moving distance L of the previous plate frame (6) driven by the driving component (1) is increased or decreased according to the weight b of the filter cake.

2. The plate and frame filter press according to claim 1, characterized in that: The plate frame (6) has: first side and second side; Wherein, the first surface is provided with a first filter plate assembly (3); Wherein, the second surface is provided with a second filter plate assembly (4); The first filter plate assembly (3) and the second filter plate assembly (4) have a filtration pressing state and a material discharging state; The filter pressing state is configured as follows: adjacent plate frames (6) are coupled so that the first filter plate assembly (3) and the second filter plate assembly (4) enclose a filter pressing cavity (5); The unloading state is configured as follows: the first filter plate assembly (3) and the second filter plate assembly (4) are separated; Furthermore, the scraper assembly (2) is in contact with the first filter plate assembly (3).

3. The plate and frame filter press according to claim 2, characterized in that; The first filter plate assembly (3) comprises: A first filter plate (301), one end of which is rotatably connected to the plate frame (6); A winding member connected between the first filter plate (301) and the plate frame (6); The winding member is configured to allow the first filter plate (301) to move along the direction of gravity when it is subjected to the weight b of the filter cake; and to restore the first filter plate (301) to an initial position when it is not subjected to the weight b of the filter cake; A detection member (302), the detection member (302) being configured to: detect a deformation force exerted on the winding member due to the weight b of the filter cake, and transmit the deformation force to the driving component (1); The moving distance L of the driving component (1) is negatively correlated with the weight b of the filter cake.

4. The plate and frame filter press according to claim 3, characterized in that: The second filter plate assembly (4) comprises: A second filter plate (401) fixedly disposed on the plate frame (6); A sealing member (402) encloses the circumference of the second filter plate (401); Wherein, the second filter plate (401) protrudes in a direction perpendicular to the plate frame (6); Furthermore, the first filter plate (301) is recessed in a direction perpendicular to the plate frame (6).

5. The plate and frame filter press according to claim 4, characterized in that: The scraper assembly (2) comprises: A displacement member (202) slidably connected to the filter press body; The displacement member (202) is controlled by the first travel section of the reciprocating displacement of the driving assembly (1) to move toward the target plate frame (6); A linkage member (203) is arranged on the displacement member (202) and is meshedly connected with the driving assembly (1); A first adjusting member (204) connected to the linkage member (203) and hinged to the scraper (201); A second adjusting member (205) is hingedly connected to the scraper (201); The linkage member (203) is controlled by the moving distance L of the driving component (1), and drives the first adjusting member (204) toward or away from the second adjusting member (205), so as to adjust the angle a of the scraper (201); Wherein, the first adjusting member (204) and the second adjusting member (205) have a reciprocating displacement along the direction of gravity; Wherein, the included angle a of the scraper (201) is negatively correlated with the weight b of the filter cake.

6. The plate and frame filter press according to claim 5, characterized in that: The driving assembly (1) comprises: A driving body (101) slidably connected to the filter press body; A locking claw (102) is arranged on the driving body (101); A stop block (103) is arranged on a side wall surface of the driving body (101); The stopping block (103) is configured to contact the displacement member (202).

7. The plate and frame filter press according to claim 6, characterized in that: include: A meshing part (701) and a meshing part (702); Wherein, the meshing portion (701) is arranged on a side wall surface of the driving body (101); Wherein, the second meshing portion (702) is one of the structures of the linkage member (203); Furthermore, at least when the driving body (101) is displaced by the moving distance L, the first meshing part (701) and the second meshing part (702) are meshingly connected.

8. The plate and frame filter press according to claim 2, characterized in that: The plate frame (6) comprises: A variable volume cavity (8) formed between the first filter plate assembly (3) and the second filter plate assembly (4); The side wall surface of the variable volume cavity (8) is deformed by the introduction of a high-pressure gas, and is in contact with the first filter plate assembly (3) and the second filter plate assembly (4).

9. The plate and frame filter press according to claim 4, characterized in that: include: The sewage enters the pipeline (902) and is communicated with the filter press cavity (5) enclosed by the first filter plate (301) and the second filter plate (401) of each adjacent plate frame (6); The clean water discharge pipeline (903) is connected to the clean water cavities on both sides of each of the filter press cavities (5).

10. The plate and frame filter press according to claim 1, characterized in that: Also includes: Rack (10); A main driving device (11) is arranged at one end of the frame (10); Wherein, the main driving device (11) drives the plurality of plate frames (6) to form a pressed connection.

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