A filter plate set and filter press

Abstract

The utility model discloses a filter plate group, including a plurality of mutually interval arrangement's filter plate and the elastomer of setting on the two side surfaces of filter plate, and the elastomer extends along the edge close to the baffle and is enclosed and forms the closed structure, and the two elastomers between the adjacent filter plate extrude each other when finishing the film, to form the sealed filter press chamber in the space between two baffle and in two elastomer, the fixed connecting plate is fixedly connected with the part of the corresponding elastomer of the two side surfaces of filter plate, and the elastomer is cast in the side of fixed connecting plate. The utility model discloses still disclosed the filter press with the filter plate group of this. The utility model has the beneficial effect that can avoid the injury or damage caused by the partial force of elastomer too big.

Description

Technical Field

[0001] This utility model relates to a filter plate assembly and a filter press, belonging to the technical field of filter presses. Background Technology

[0002] As a common solid-liquid separation device, the filter press's core component, the filter plate assembly, forms a sealed filter chamber through the sealing of adjacent filter plates. In existing technology, dovetail grooves are typically provided on the sides of the filter plates, and the elastomer is engaged with them via a protruding insertion structure to connect the elastomer to the filter plate. However, this method has a significant drawback: during the filtration process, the longitudinal reaction force generated by the material is concentrated at the engagement area between the dovetail groove and the insertion structure, which can easily lead to breakage, deformation, or fatigue damage in the engagement area of ​​the elastomer or filter plate, affecting the reliability of the seal. Utility Model Content

[0003] The purpose of this invention is to provide a filter plate assembly and a filter press that can avoid damage or breakage caused by excessive local stress on the elastomer.

[0004] This utility model is achieved through the following technical solution.

[0005] A filter plate assembly includes multiple filter plates arranged at intervals and elastic bodies disposed on two sides of the filter plates. The elastic bodies extend along the edge near the partition and enclose to form a closed structure. When the membrane is closed, the two elastic bodies between adjacent filter plates press against each other to form a sealed filter chamber in the space between the two partitions and enclosed by the two elastic bodies.

[0006] The filter plate has fixed connecting plates on both sides corresponding to the parts of the elastomer. The elastomer is cast and molded on the sides of the fixed connecting plates.

[0007] As a further improvement of this utility model, the fixed connecting plate has a fixed connecting part that is not covered by an elastomer, and the fixed connecting part and the filter plate are fixedly connected by fasteners that pass through the fixed connecting part and into the filter plate.

[0008] As a further improvement of this utility model, the fixed connection part includes an outer fixed connection part near the edge of the filter plate and an inner fixed connection part away from the edge of the filter plate.

[0009] As a further improvement of this utility model, it also includes a permeable layer and a filter cloth. The permeable layer is attached and fixed to the two sides of the filter plate at the corresponding fixed connecting plate inner circumference. The filter cloth is attached to the side of the permeable layer, and its edge is clamped by the filter plate and the fixed connecting plate.

[0010] As a further improvement of this utility model, the filter cloth is clamped between the edge of the permeable layer and the inner edge of the fixed connecting plate.

[0011] As a further improvement of this utility model, the filter plate has a frame that is laterally protruding relative to the two sides at its edge, and the outer edge of the fixed connecting plate is attached to the corresponding frame.

[0012] As a further improvement of this utility model, when the film is closed, one of the two mutually attached elastic bodies has a protruding positioning block on its surface and the other has a recessed positioning slot, and the positioning block and the positioning slot engage with each other during the film closing process.

[0013] As a further improvement of this utility model, the width of the elastic body gradually decreases from the side connected to the fixed connecting plate to the side away from the fixed connecting plate.

[0014] A filter press, comprising a filter plate assembly.

[0015] The beneficial effects of this utility model are:

[0016] The elastomer is integrally cast onto the fixed connecting plate, ensuring that the longitudinal reaction force of the material is evenly distributed across the entire connection surface. This completely avoids the risk of damage caused by localized stress concentration and significantly improves sealing reliability. The fixed connection section adopts a dual-zone fastening design with both outer and inner perimeters. Its longitudinal spacing is consistent with the direction of the reaction force, ensuring balanced and robust stress on the connecting plate and greatly enhancing its compressive strength. The frame structure provides longitudinal support for the connecting plate, further dispersing pressure and protecting the filter plate body. Attached Figure Description

[0017] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of this utility model, wherein:

[0018] Figure 1 This is a schematic diagram of the filter plate assembly.

[0019] Figure 2 This is a partial cross-sectional view of the filter plate assembly. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0021] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0022] Implementation method 1:

[0023] This embodiment illustrates a filter plate assembly capable of preventing damage to the elastomer from excessive localized stress. (Refer to...) Figure 1 and Figure 2 The filter plate assembly comprises multiple filter plates 1 arranged at intervals within a filter press, forming a filter chamber space. Each filter plate 1 has an elastomer 2 on both sides. These elastomers 2 are made of flexible materials such as rubber or silicone, extending along the area near the edge of the filter plate 1 and forming a complete closed structure. This ensures that during the film-forming process (i.e., the distance between adjacent filter plates 1 gradually decreases), the two elastomers 2 on adjacent filter plates 1 will press against each other, thereby forming a tightly sealed filter chamber between the two filter plates 1 and within the space surrounding the two elastomers 2, preventing material leakage. Specifically, a fixing plate 3 is fixedly connected to the two sides of the filter plate 1 corresponding to the elastomers 2. This fixing plate 3 is typically made of metal or high-strength plastic. The elastomers 2 are directly attached to the sides of the fixing plate 3 through a casting molding process; that is, during manufacturing, molten elastomer 2 material is injected into a mold and solidified onto the fixing plate 3, forming an integral structure. Since the elastomer 2 is cast onto the side of the fixed connecting plate 3, during the filtration process, when the material fills the filter chamber and generates a longitudinal reaction force, this reaction force is transmitted to the fixed connecting plate 3 through the elastomer 2. The fixed connecting plate 3, acting as a rigid support, can evenly distribute the force, ensuring a balanced stress distribution at the connection point of the elastomer 2 and avoiding stress concentration. This significantly reduces the risk of tearing or deformation of the elastomer 2 due to excessive local stress, extending the service life of the filter plate assembly. Furthermore, this connection method improves the installation accuracy and sealing reliability of the elastomer 2, eliminating the need for traditional dovetail groove structures and simplifying the manufacturing process.

[0024] In this embodiment, based on considerations of improving connection strength and protecting the structure of the elastomer 2, the fixed connecting plate 3 has a fixed connecting portion not covered by the elastomer 2. This fixed connecting portion is located in the edge area of ​​the fixed connecting plate 3 and is not covered by the cast elastomer 2 material, thus being exposed to the outside. The fixed connecting portion and the filter plate 1 are fixedly connected by fasteners that pass through the fixed connecting portion and into the filter plate 1. The fasteners can be bolts, screws, or rivets, etc., with their heads located outside the fixed connecting portion and the screw portion embedded in the pre-made hole of the filter plate 1. A firm connection is achieved by tightening or pressing. This design, on the one hand, allows the fixing effect of the fasteners to act directly on the fixed connecting plate 3, greatly improving the connection strength and stability of the fixed connecting plate 3 on the filter plate 1 and preventing loosening under high-pressure filtration conditions; on the other hand, the fasteners do not need to pass through the elastomer 2 itself, but only operate through the fixed connecting portion, thus maintaining the integrity of the elastomer 2 structure, without damaging its continuity and sealing performance after casting, so that the elastomer 2 can better withstand the reaction force of the material during filtration and is less prone to damage. At the same time, the structure is easy to maintain and replace, and users can directly disassemble the fasteners without affecting the elastomer 2.

[0025] In this embodiment, to further improve the firm fixation of the fixed connecting plate 3 on the filter plate 1, the fixed connection includes an outer fixed connecting portion 31 near the edge of the filter plate 1 and an inner fixed connecting portion 32 away from the edge of the filter plate 1. The outer fixed connecting portion 31 is located at the outer end of the fixed connecting plate 3, close to the edge contour of the filter plate 1, while the inner fixed connecting portion 32 is located at the inner end of the fixed connecting plate 3, close to the central area of ​​the filter plate 1. The two are spaced apart longitudinally (i.e., in a direction perpendicular to the surface of the filter plate 1). During the filtration process, the direction of the reaction force generated by the material is consistent with the longitudinal spacing direction. That is, when the force is transmitted from the elastic body 2 to the fixed connecting plate 3 and then acts on the filter plate 1, the outer and inner fixed connecting portions 32 form a synergistic support through multi-point fixation by fasteners, making the overall force on the fixed connecting plate 3 more uniform, avoiding the risk of skewing or detachment caused by single-point bearing, thereby ensuring that the fixed connecting plate 3 is firmly fixed on the filter plate 1 and maintains high stability even in repeated filtration cycles.

[0026] In this embodiment, based on the requirement of fixing the filter cloth 5, the filter plate assembly also includes a permeable layer 4 and a filter cloth 5. The permeable layer 4 is made of a porous material such as non-woven fabric or a mesh plate, and is attached and fixed to the two sides of the filter plate 1 at the corresponding inner perimeter of the fixed connecting plate 3. That is, the permeable layer 4 covers the central area of ​​the filter plate 1, and its edge does not extend to the outside of the fixed connecting plate 3. The filter cloth 5 is made of filter fabric and is attached to the side of the permeable layer 4. The size of the filter cloth 5 is slightly larger than that of the permeable layer 4, so its edge extends to the junction of the fixed connecting plate 3 and the filter plate 1, and is fixed by the filter plate 1 and the fixed connecting plate 3 by a clamping method. That is, the edge of the filter cloth 5 is clamped between the surface of the filter plate 1 and the side of the fixed connecting plate 3, and is pressed onto the filter plate 1 by the pressure of the fixed connecting plate 3. With this design, the fixed connecting plate 3 not only plays the core role of connecting the elastic body 2, but also undertakes the auxiliary function of fixing the filter cloth 5. The edge of the filter cloth 5 is firmly fixed by the clamping mechanism to prevent the filter cloth 5 from shifting or wrinkling due to material flow during the filtration process, thereby improving the filtration efficiency and the uniformity of material separation. At the same time, it reduces the need for additional fixing parts, simplifies the structure of the filter plate group and reduces the manufacturing cost.

[0027] In this embodiment, to further improve the firmness of the connection of the filter cloth 5, the edge of the permeable layer 4 and the inner edge of the fixing connecting plate 3 jointly clamp the filter cloth 5. Specifically, the edge area of ​​the permeable layer 4 (i.e., the part near the inner edge of the fixing connecting plate 3) and the inner edge of the fixing connecting plate 3 (i.e., the side of the fixing connecting plate 3 near the center of the filter plate 1) form a clamping surface. The corresponding edge portion of the filter cloth 5 is precisely placed between these clamping surfaces and pressed and fixed by the installation pressure of the fixing connecting plate 3. The rigid structure of the edge of the permeable layer 4, combined with the pressing force of the inner edge of the fixing connecting plate 3, increases the contact area and pressure intensity of the clamping point, making it less likely for the filter cloth 5 to loosen or come out under the action of longitudinal reaction force. This further improves the reliability of the connection and prevents the filter cloth 5 from shifting during high-pressure filtration, which could affect the sealing effect or cause material leakage.

[0028] In this embodiment, considering the provision of longitudinal support, the filter plate 1 has a frame 11 that protrudes laterally relative to the two sides at its edge. This frame 11 is integrally formed on the edge of the filter plate 1 by molding or casting, with the protrusion height slightly higher than the surface of the filter plate 1, forming a stepped structure. The outer edge of the fixing connecting plate 3 (i.e., the portion of the fixing connecting plate 3 near the outer side of the filter plate 1) is attached to the corresponding frame 11, meaning the bottom of the fixing connecting plate 3 contacts the top surface of the frame 11, providing a support surface through the protrusion of the frame 11. During the filtration process, the reaction force of the material mainly acts on the elastic body 2 and is transmitted to the fixing connecting plate 3. The frame 11, as a rigid support point, can directly bear and disperse this longitudinal force, thereby reducing the burden on the filter plate 1 body, preventing deformation or damage to the edge area of ​​the filter plate 1 due to force concentration, and simultaneously improving the rigidity and durability of the overall structure.

[0029] In this embodiment, to improve sealing and positioning accuracy, during membrane assembly, one of the two mutually contacting elastic bodies 2 has a protruding positioning block 21, and the other has a recessed positioning slot 22 on their contact surfaces. The positioning block 21 is integrally molded onto the surface of the elastic body 2, forming a boss shape; the positioning slot 22 is correspondingly recessed into the surface of the other elastic body 2, with a shape matching the positioning block 21. During membrane assembly, when adjacent filter plates 1 approach each other, the positioning block 21 and positioning slot 22 automatically align and engage, achieving precise alignment. This engaging mechanism not only allows the two elastic bodies 2 to connect quickly and stably during membrane assembly, avoiding misalignment, but also increases the actual contact area between the two elastic bodies 2 through the insertion of the block and slot, thereby enhancing the tightness of the sealing interface, effectively preventing material leakage from the joint under high pressure, and improving the overall sealing performance of the filter press chamber.

[0030] In this embodiment, to optimize the structure of the elastomer 2, the width of the elastomer 2 gradually decreases from the side connected to the fixed connecting plate 3 to the side away from the fixed connecting plate 3. Specifically, the elastomer 2 has a larger width on the side attached to the fixed connecting plate 3, providing a stable connecting base, while the width decreases in a tapered or stepped manner as it extends away from the fixed connecting plate 3, reducing material usage and weight, while also adapting to the extrusion deformation requirements during film lamination.

[0031] Implementer 2:

[0032] A filter press includes a filter plate assembly as shown in Embodiment 1. The filter press of this embodiment integrates all the technical features of the aforementioned filter plate assembly into its structure, such as multiple filter plates 1, an elastomer 2, a fixed connecting plate 3, a permeable layer 4, and filter cloth 5, all arranged and connected in the same way. The filter press thus possesses all the technical benefits of the filter plate assembly, such as avoiding localized stress damage to the elastomer 2, improving connection strength, ensuring reliable fixing of the filter cloth 5, and enhancing sealing performance. This results in an overall improvement in the filter press's filtration efficiency, sealing performance, and durability, making it suitable for high-pressure applications such as industrial wastewater treatment or mining separation.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A filter plate assembly, characterized in that, It includes multiple filter plates (1) arranged at intervals, and elastic bodies (2) disposed on two sides of the filter plates (1). The elastic bodies (2) extend along the edge near the filter plates and enclose to form a closed structure. When the membrane is closed, the two elastic bodies (2) between adjacent filter plates (1) are pressed against each other to form a sealed filter chamber in the space between the two filter plates and enclosed by the two elastic bodies (2). The filter plate (1) has a fixed connecting plate (3) fixedly connected to the two sides of the elastic body (2) at the corresponding parts. The elastic body (2) is cast and molded on the side of the fixed connecting plate (3).

2. The filter plate assembly according to claim 1, characterized in that, The fixed connection plate (3) has a fixed connection portion not covered by the elastomer (2), and the fixed connection portion and the filter plate (1) are fixedly connected by fasteners that pass through the fixed connection portion and into the filter plate (1).

3. The filter plate assembly according to claim 2, characterized in that, The fixed connection part includes an outer fixed connection part (31) near the edge of the filter plate (1) and an inner fixed connection part (32) away from the edge of the filter plate (1).

4. The filter plate assembly according to claim 1, characterized in that, It also includes a permeable layer (4) and a filter cloth (5). The permeable layer (4) is attached to the two sides of the filter plate (1) at the positions corresponding to the inner perimeter of the fixed connecting plate (3). The filter cloth (5) is attached to the side of the permeable layer (4), and its edge is held by the filter plate (1) and the fixed connecting plate (3).

5. The filter plate assembly according to claim 4, characterized in that, The filter cloth (5) is clamped between the edge of the permeable layer (4) and the inner edge of the fixed connecting plate (3).

6. The filter plate assembly according to claim 1, characterized in that, The filter plate (1) has a frame (11) that protrudes laterally relative to the two sides at its edge, and the outer edge of the fixed connecting plate (3) is attached to the corresponding frame (11).

7. The filter plate assembly according to claim 1, characterized in that, When the film is closed, on the surfaces of the two elastic bodies (2) that are in contact with each other, one has a protruding positioning block (21) and the other has a recessed positioning slot (22), and the positioning block (21) and the positioning slot (22) engage with each other during the film closing process.

8. The filter plate assembly according to claim 1, characterized in that, The width of the elastic body (2) gradually decreases from the side connected to the fixed connecting plate (3) to the side away from the fixed connecting plate (3).

9. A filter press, characterized in that, Includes the filter plate assembly as described in any one of claims 1-8.

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