Filter plate group and filter press

Abstract

The invention discloses a filter plate group which comprises a plurality of filter plates arranged at intervals and an elastic body located between any two adjacent filter plates, and the elastic body is defined along the edges close to two corresponding partition plates; and the elastic body and the two corresponding adjacent filter plates are configured as follows: the elastic body is fixedly connected to one filter plate, is extruded and is attached to the other filter plate when film closing is completed, and is used for sealing a filter pressing chamber formed between the two filter plates. The invention also discloses a filter press with the filter plate group. The sealing structure has the beneficial effect that the sealing reliability can be improved.

Description

Technical Field

[0001] The invention relates to a filter plate group and a filter press, belonging to the technical field of filter presses. Background Art

[0002] Filter presses are key equipment in the industrial solid-liquid separation field. Their core component, the filter plate assembly, typically consists of multiple spaced filter plates and a sealing structure. In existing technology, elastic members (or elastic frames) are fixed on both sides of the filter plates. When the filter plates are closed, the two elastic members squeeze and fit together to form a seal, creating a filter press chamber between the plates. However, the seal stability of the two elastic members in the squeezed and fitted area is poor, which can easily lead to material leakage. Summary of the Invention

[0003] The object of the present invention is to provide a filter plate group and a filter press, which can improve the sealing reliability.

[0004] The present invention is achieved through the following technical solutions.

[0005] A filter plate assembly comprises a plurality of filter plates spaced apart from each other, and an elastic body located between any two adjacent filter plates, wherein the elastic body is formed along edges adjacent to corresponding two separators; The elastic body and the corresponding two adjacent filter plates are configured such that the elastic body is fixedly connected to one of the filter plates and is squeezed and adhered to the other filter plate when the membrane is closed to seal the filter press chamber formed between the two filter plates.

[0006] As a further improvement of the present invention, when the membrane is closed, at least two surfaces of the elastic body providing different sealing directions are squeezed and attached to the corresponding filter plate surfaces.

[0007] As a further improvement of the present invention, the width of the elastic body in the longitudinal direction gradually decreases from one side fixed to a filter plate to the other side.

[0008] As a further improvement of the present invention, the elastomer has a longitudinal sealing surface for relatively providing longitudinal sealing, and a transverse sealing surface for relatively providing transverse sealing. The side of the filter plate that is not fixedly connected to the elastomer has a longitudinal sealing mating surface that squeezes the longitudinal sealing surface and fits together when the membrane is closed. The side of the filter plate that is not fixedly connected to the elastomer has a first transversely raised frame on its edge. The first frame has a transverse sealing mating surface that squeezes the transverse sealing surface for sealing and fits together when the membrane is closed.

[0009] As a further improvement of the present invention, when the longitudinal sealing surface gradually approaches and fits onto the longitudinal sealing mating surface during the film closing process, a gap is provided between the transverse sealing surface and the transverse sealing mating surface.

[0010] As a further improvement of the present invention, the gap between the transverse sealing surface and the longitudinal sealing matching surface gradually decreases in a direction gradually approaching the longitudinal sealing surface.

[0011] As a further improvement of the present invention, when the longitudinal sealing surface gradually approaches and fits on the transverse sealing mating surface during the film closing process, the transverse sealing surface fits on the longitudinal sealing mating surface.

[0012] As a further improvement of the present invention, the portion where the side surface of the first frame and the transverse sealing mating surface are connected is configured as an arc-shaped surface.

[0013] As a further improvement of the present invention, when the longitudinal sealing surface gradually approaches and fits onto the transverse sealing mating surface during the film closing process, the longitudinal sealing mating surface has a portion that is not in contact with the longitudinal sealing surface.

[0014] As a further improvement of the present invention, when the membrane is combined, at least one surface of the elastic body is pressed and adhered to the corresponding filter plate surface.

[0015] As a further improvement of the present invention, the elastomer has a longitudinal surface relatively to the longitudinal direction and a transverse surface relatively to the transverse direction. The side of the filter plate that is not fixedly connected to the elastomer has a longitudinal mating surface corresponding to the longitudinal surface. The side of the filter plate that is not fixedly connected to the elastomer has a first transversely raised frame. The first frame has a transverse mating surface corresponding to the transverse surface. When the film is closed, the longitudinal surface is affixed to the longitudinal mating surface, or / and the transverse surface is affixed to the transverse mating surface.

[0016] As a further improvement of the present invention, the elastomer has a longitudinal fitting surface that fits on the filter plate fixedly connected to it, and the side of the filter plate fixedly connected to the elastomer has a longitudinal fitting matching surface that fits with the longitudinal fitting surface; the elastomer is respectively provided with a first insertion structure and a second insertion structure at the outer periphery and inner periphery of its longitudinal fitting surface, and the side of the filter plate fixedly connected to the elastomer has a transversely protruding second frame at its edge, and a first slot that is plugged into and matched with the first insertion structure is formed at the connection between the filter plate and the second frame, and a pressure ring that is longitudinally spaced apart from the first slot and is used to press the filter cloth is fixed on the side of the filter plate fixedly connected to the elastomer, and the filter plate and the pressure ring form a second slot that is plugged into and matched with the second insertion structure.

[0017] As a further improvement of the present invention, the elastic body and the second frame respectively have a transverse fitting surface and a transverse fitting matching surface that fit together.

[0018] As a further improvement of the present invention, at least one set of force-bearing grooves and force-bearing protrusions that are snap-fitted are provided on the longitudinal fitting surface of the filter plate and the longitudinal fitting surface of the elastomer; the force-bearing grooves are formed on the longitudinal fitting surface, and the force-bearing protrusions are formed on the longitudinal fitting surface, or the force-bearing grooves are formed on the longitudinal fitting surface, and the force-bearing protrusions are formed on the longitudinal fitting surface.

[0019] As a further improvement of the present invention, the longitudinal fitting surface of the elastic body is provided with at least one deformation buffer groove which forms a gap with the longitudinal fitting matching surface of the filter plate, for providing a buffer deformation space when the elastic body is squeezed.

[0020] As a further improvement of the present invention, the elastic body is connected to a fixing plate, and the elastic body is cast and molded on the fixing plate, and the fixing plate is fixedly connected to one side of the filter plate.

[0021] As a further improvement of the present invention, the fixing plate has a fixing portion which is not connected to the elastic body, and the fixing portion and the filter plate are fixedly connected by fasteners.

[0022] As a further improvement of the present invention, one side of the filter plate is fixedly connected to the corresponding elastomer, and the other side is not fixedly connected to the corresponding elastomer, or both sides of the filter plate are fixedly connected to the corresponding two elastomers, or both sides of the filter plate are not fixedly connected to the corresponding two elastomers.

[0023] A filter press comprises a filter plate group.

[0024] Beneficial effects of the present invention: The filter plate group significantly improves sealing reliability by fixing the elastomer to one of the filter plates, which is squeezed and adhered to the other filter plate when the membrane is closed to form a filter press chamber. Specifically, the number of sealing surfaces is reduced from three in the existing technology to two (one sealing surface between the elastomer and the fixed filter plate, and one sealing surface between the elastomer and the adjacent filter plate), reducing the risk of leakage caused by misalignment or aging differences of multiple sealing surfaces; at the same time, during the filtration process, the rigid-elastic contact between the elastomer and the filter plate can better resist the combined action of the lateral force F1 (membrane closing extrusion force) and the longitudinal force F2 (material reaction force), avoiding the sealing failure caused by elastic-elastic contact between elastomers in the existing technology due to rebound differences or uneven force; in addition, sealing can be achieved by squeezing only a single elastomer, which significantly reduces the power demand for membrane closing and improves energy efficiency compared to the existing technology of synchronously squeezing two elastomers; and the elastomer avoids the problem of uneven force caused by misaligned extrusion, slows down the aging of the material, and extends the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to help understand the objects and advantages of the present invention, wherein: Figure 1 It is the structural diagram of the filter plate group; Figure 2 is a cross-sectional schematic diagram of the filter plate and the elastomer; Figure 3 is a schematic cross-sectional view of an elastic body; Figure 4A schematic cross-sectional view of a filter plate that is not fixedly connected to an elastomer in a first embodiment; Figure 5 is a schematic cross-sectional view of an elastic body and a filter plate to which the elastic body is not fixed in one embodiment; Figure 6 is a schematic cross-sectional view of an elastic body and a filter plate to which the elastic body is not fixed in another embodiment; Figure 7 Schematic diagram of the fixed connection between the elastic body and the filter plate in one embodiment; Figure 8 for Figure 7 A schematic cross-sectional view of a filter plate; Figure 9 It is a cross-sectional diagram of the elastic body and the filter plate with respect to the stress-bearing groove and the stress-bearing protrusion; Figure 10 It is a cross-sectional schematic diagram of the elastic body and the filter plate with respect to the deformation buffer groove; Figure 11 Schematic diagram of fixed connection between the elastic body and the filter plate in another embodiment; Figure 12 A schematic cross-sectional view of a filter plate that is not fixedly connected to an elastomer in a second embodiment; Figure 13 Schematic cross-sectional view of a filter plate that is not fixedly connected to an elastomer in a third embodiment. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and implementation examples.

[0027] In this specification, directional terms such as up, down, left, right, front, back, front, back, top, and bottom, which are mentioned or may be mentioned, are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these or other directional terms should not be construed as restrictive.

[0028] Implementation method 1:

[0029] This embodiment shows a filter plate assembly that can improve sealing reliability and reduce the power requirements of the filter press. Figures 1-10The filter plate assembly includes a plurality of filter plates 1 spaced apart from each other, wherein an elastic body 2 is provided between any two adjacent filter plates 1. The elastic body 2 continuously surrounds the edges of the corresponding two filter plates 1 to form a complete annular structure, ensuring the boundary sealing of the filter press chamber. The filter plates 1 are made of a rigid material, and the elastic body 2 is made of an elastic material. Specifically, the elastic body 2 is fixedly connected to one of the corresponding adjacent filter plates 1, while not in contact with the other corresponding adjacent filter plate 1. During the membrane closing process, when the filter plates 1 approach each other, the elastic body 2 is squeezed and deformed and tightly fits the filter plate 1 that is not fixedly connected to it, thereby forming a closed filter press chamber between the two filter plates 1 for material pressure filtration operations.

[0030] First of all, in this configuration of the present embodiment, the elastomer 2 only contacts and squeezes the two filter plates 1, rather than involving mutual squeezing between the two elastomers 2 as in the prior art. Since the elastomer 2 in this solution is fixed on one filter plate 1 and is only squeezed and fitted with the other filter plate 1, the sealing surfaces only exist between the elastomer 2 and the fixed filter plate 1 and between the elastomer 2 and the other filter plate 1, for a total of two sealing surfaces. In comparison, the prior art requires two elastomers 2 to fit each other to form three sealing surfaces (one sealing surface for each elastomer 2 and the corresponding filter plate 1, plus one sealing surface between the two elastomers 2). More sealing points means a higher potential leakage risk. The present solution reduces the number of sealing surfaces, which directly improves the sealing reliability and reduces the probability of leakage.

[0031] Secondly, in terms of force analysis, when the membrane is closed, under the action of the lateral force F1 (from the extrusion direction of the filter plate 1) and the longitudinal force F2 (the reaction force of the material on the elastomer 2 during the filtration process), the rigid-elastic contact of this embodiment (the filter plate 1 is a rigid material, and the elastomer 2 is an elastic material) is more stable than the elastic-elastic contact of the prior art (the two elastomers 2 squeeze each other), because the rigid surface provides uniform support and is not prone to sealing failure due to uneven force. In the prior art, the contact between the elastomers 2 is easily affected by rebound differences or different degrees of aging, resulting in dislocation and leakage.

[0032] Furthermore, in the prior art, the two elastomers 2 may be misaligned when the membrane is bonded due to differences in rebound or different degrees of aging (for example, in the prior art, the positioning protrusions and positioning grooves of the two elastomers 2 are not precisely snap-fitted during the membrane bonding process), which not only easily causes leakage, but also aggravates the uneven force on the elastomer 2 when it is squeezed, thereby accelerating aging; however, this embodiment eliminates this risk of misalignment and extends the service life by fixedly connecting the elastomer 2 to a filter plate 1.

[0033] Finally, in the prior art, the force required for the two elastomers 2 to squeeze each other and be squeezed by the filter plate 1 is greater (equivalent to a force model in which two elastomers 2 are connected in series), while this solution only requires squeezing one elastomer 2 to fit the other filter plate 1, significantly reducing the power requirement for membrane closing and making the filter press more efficient and energy-efficient.

[0034] In this embodiment, to enhance sealing effectiveness, at least two surfaces of the elastomer 2, each providing different sealing directions, are compressed and adhered to the corresponding surfaces of the filter plate 1 during the membrane closing process. During the membrane closing process, when the elastomer 2 is compressed, these two surfaces with different sealing directions adhere to the surface of the filter plate 1 simultaneously or in stages, forming a multi-directional sealing barrier. By applying sealing forces in different directions, the sealing effect is significantly improved. Because a single-direction sealing surface may cause gap leakage due to material pressure or vibration, multi-directional sealing surfaces can compensate for each other. Even when subjected to the impact of F2 (longitudinal force) during the filtration process, the overall seal integrity can be maintained, reducing the risk of material leakage.

[0035] In this embodiment, to further enhance sealing effectiveness and accommodate extrusion deformation, the longitudinal width of the elastomer 2 gradually decreases from the side fixed to one filter plate 1 to the other. Specifically, the cross-sectional shape of the elastomer 2 is wider at the fixed end (the side connected to the filter plate 1) and narrower at the free end (the side abutting the adjacent filter plate 1), resulting in an overall shape resembling a conical structure. During membrane extrusion, the narrow end preferentially contacts and deforms the filter plate 1, gradually distributing the extrusion stress toward the wide end. This conical design facilitates deformation and conformation of the elastomer 2 under compression. Initial contact at the narrow end generates concentrated sealing force, while the wide end provides support, ensuring an even distribution across the sealing surface. During the filtration process, when material pressure acts on the elastomer 2, the conical shape helps disperse the longitudinal force F2, reducing stress concentration and thereby improving seal durability and reliability. The advantages of this conical structure include a tighter seal formed by the narrow end abutting the filter plate 1, and a more controllable deformation process of the elastomer 2, reducing the risk of seal failure.

[0036] In this embodiment, to enhance multi-directional sealing, the elastomer 2 has a longitudinal sealing surface 2a that relatively provides longitudinal sealing, and a transverse sealing surface 2b that relatively provides transverse sealing. The side of the filter plate 1 not fixedly connected to the elastomer 2 has a longitudinal sealing mating surface 1a that compresses and mates with the longitudinal sealing surface 2a when the membrane is closed. Furthermore, the side of the filter plate 1 not fixedly connected to the elastomer 2 has a transversely raised first frame 11 on its edge. This first frame 11 has a transverse sealing mating surface 1b that compresses and mates with the transverse sealing surface 2b when the membrane is closed. In the actual structure, the longitudinal sealing surface 2a and the longitudinal sealing mating surface 1a are generally along the longitudinal direction (perpendicular to the plane of the filter plate 1), while the transverse sealing surface 2b and the transverse sealing mating surface 1b are slightly inclined in the transverse direction (parallel to the edge of the filter plate 1). The two form a cross-sealing network, thereby forming a complementary sealing geometry. Through this design, the elastomer 2 is squeezed longitudinally and transversely at the same time when the membrane is closed, forming a sealing interface in multiple directions, which significantly improves the overall sealing effect. During the filtration process, the longitudinal seal mainly resists the longitudinal force F2 of the material, while the transverse seal is aimed at the transverse force F1. The multi-directional synergy reduces the pressure concentration in a single sealing direction, avoids leakage caused by failure of a single sealing surface, and ensures that the seal can remain stable even if the force direction changes during the filtration process, thereby enhancing the sealing stability and reliability of the filter press chamber.

[0037] In this embodiment, referring to Figure 5 Combined with Figure 3 and Figure 4 In one embodiment, to optimize the membrane closing process and reduce stress concentration on the elastomer 2, a gap s is defined between the transverse sealing surface 2b and the transverse sealing surface 1b as the longitudinal sealing surface 2a gradually approaches and fits against the longitudinal sealing mating surface 1a during the membrane closing process. Specifically, in the initial membrane closing process, the longitudinal sealing surface 2a of the elastomer 2 first contacts and fits against the longitudinal sealing mating surface 1a, while the transverse sealing surface 2b has not yet made contact. As the membrane closing process continues, the elastomer 2 is squeezed and deformed at the longitudinal sealing surface 2a, causing the transverse sealing surface 2b to gradually move toward the transverse sealing mating surface 1b, and the gap s gradually decreases until it is fully fitted. This staged force buffering process allows the elastomer 2 to deform more gradually, avoiding material fatigue or damage caused by sudden high-pressure shocks. At the same time, the buffering process helps gradually build up the sealing force, quickly forming a basic seal in the initial membrane closing process, and subsequently strengthening the multi-directional seal. As a result, when F1 and F2 act simultaneously during the filtration process, the elastomer 2 can more stably maintain a sealed state, extending its service life and reducing the failure rate.

[0038] In this embodiment, in order to ensure the smoothness of the buffering process and reduce the impact, the gap s between the transverse sealing surface 2b and the longitudinal sealing mating surface 1a gradually decreases in the direction of gradually approaching the longitudinal sealing surface 2a. During the membrane closing process, the reduction of the gap s is not sudden but gradual. The gap s starts to be larger at the part far away from the longitudinal sealing surface 2a and gradually decreases towards the part close to it. In this way, when the transverse sealing surface 2b of the elastomer 2 is fitted to the transverse sealing mating surface 1b, it is gradually rather than instantaneously contacted, making the extrusion deformation more uniform. This gradual fitting method reduces the stress peak of the elastomer 2 material at the moment of contact, avoids local tearing or permanent deformation, and thus maintains the sealing performance during long-term use. At the same time, the progressive fitting helps to adapt to the dynamic changes of F2 during the filtration process. The sealing surface can respond to the material pressure more flexibly, thereby improving the sealing reliability and the durability of the elastomer 2.

[0039] In this embodiment, referring to Figure 6 Combined with Figure 3 and Figure 4 In another embodiment, based on the consideration of achieving a tight seal, when the longitudinal sealing surface 2a gradually approaches and fits on the transverse sealing mating surface 1b during the film closing process, the transverse sealing surface 2b fits on the longitudinal sealing mating surface 1a. Specifically, the film closing action causes the longitudinal sealing surface 2a to fit on the transverse sealing mating surface 1b when the elastomer 2 is not significantly squeezed, and at the same time, the transverse sealing surface 2b fits on the longitudinal sealing mating surface 1a, forming an interference fit (i.e., a slight interference fit). This design ensures that there is no gap between the sealing surfaces and that a seal can be established immediately even under a small extrusion force. The advantage of an interference fit is that when F1 and F2 act during the filtration process, the sealing surface always maintains a high contact pressure, effectively preventing material penetration; at the same time, the interference state compensates for manufacturing tolerances or wear, enhances the robustness of the seal, and thus improves the overall sealing effect and service life.

[0040] In this embodiment, in order to reduce damage to the elastomer 2, the portion where the side surface 11a of the first frame 11 and the transverse sealing mating surface 1b are connected is set as an arcuate surface 11b. In the actual structure, the side surface 11a of the first frame 11 (which does not directly contact the elastomer 2) and the transverse sealing mating surface 1b adopt a smooth arc transition at the junction, rather than a sharp angle. In this way, during the membrane bonding or filtration process, when the elastomer 2 is squeezed and deformed, the arcuate surface 11b reduces the stress concentration point, avoids the edge of the elastomer 2 from being scratched or cut, and thus reduces the risk of wear and aging. Compared with the angled surface, the arcuate surface 11b design is more conducive to the elastomer 2 maintaining its integrity during long-term use, thereby improving the durability and reliability of the seal.

[0041] In this embodiment, in order to adapt to the deformation of the elastomer 2 and provide sufficient sealing area, when the longitudinal sealing surface 2a gradually approaches and fits on the transverse sealing mating surface 1b during the film closing process, the longitudinal sealing mating surface 1a has a portion that is not in contact with the longitudinal sealing surface 2a. Specifically, during the initial fitting, the longitudinal sealing surface 2a only contacts a portion of the longitudinal sealing mating surface 1a, and the non-contacted area is retained as a buffer space. When the elastomer 2 is squeezed and deformed, the deformed portion fills the non-contacted area, increasing the fitting area. This design ensures that the sealing surface can be completely covered after deformation, providing a larger sealing interface. During the filter press process, when F2 acts, the increased deformed area can better disperse the pressure and avoid leakage caused by local overload, thereby enhancing the sealing stability and adaptability.

[0042] In this embodiment, there is another implementation situation when the elastic body 2 and the filter plate 1 without fixed elastic body 2 are combined. When the film is combined, at least one surface of the elastic body 2 is pressed and attached to the corresponding surface of the filter plate 1.

[0043] More specifically, the elastic body 2 has a longitudinal surface 2a' relative to the longitudinal direction and a transverse surface 2b' relative to the transverse direction. The side of the filter plate that is not fixedly connected to the elastic body 2 has a longitudinal mating surface 1a corresponding to the longitudinal surface 2a'. The side of the filter plate that is not fixedly connected to the elastic body 2 has a transversely protruding first frame 11. The first frame 11 has a transverse mating surface 1b corresponding to the transverse surface 2b'. Figure 12 When the film is completed, the longitudinal surface 2a' is attached to the longitudinal mating surface 2a and there is a gap s' between the transverse surface 2b' and the transverse mating surface 1b, or, specifically refer to Figure 13 The transverse surface 2b' is fitted on the transverse mating surface 1b and there is a gap s' between the longitudinal mating surface 2a and the transverse surface 2b'.

[0044] In this embodiment, referring to Figure 7 and Figure 8In a fixed implementation of the elastomer 2, based on the optimization of the fixed connection method, the elastomer 2 has a longitudinal fitting surface 2c that is fitted on the filter plate 1 fixedly connected thereto, and the side of the filter plate 1 fixedly connected to the elastomer 2 has a longitudinal fitting matching surface 1c that is fitted with the longitudinal fitting surface 2c; at the same time, the elastomer 2 is provided with a first insertion structure m1 at the periphery of its longitudinal fitting surface 2c, and a second insertion structure m2 at the inner periphery; the side of the filter plate 1 fixedly connected to the elastomer 2 has a transversely protruding second frame 12 at its edge, and a first slot n1 that is plugged into and matched with the first insertion structure m1 is formed at the connection between the filter plate 1 and the second frame 12; a pressure ring 13 (for pressing the filter cloth) that is longitudinally spaced from the first slot n1 is also fixed on the side of the filter plate 1 fixedly connected to the elastomer 2; the filter plate 1 and the pressure ring 13 form a second slot n2 that is plugged into and matched with the second insertion structure m2. This plug-in structure securely secures the elastomer 2 by aligning the first insertion structure m1 with the first slot n1, and the second insertion structure m2 with the second slot n2. The two insertion points are spaced longitudinally. During the filtration process, when the elastomer 2 is subjected to a longitudinal force F2, the spaced insertion points distribute the force, preventing overload on a single fixing point and improving fixation stability. This design also simplifies installation and ensures uniform contact between the sealing surfaces under load, enhancing the overall sealing effect.

[0045] In this embodiment, to enhance the sealing properties of the fixed connection, the elastomer 2 and second frame 12 each have a mutually abutting transverse abutting surface 2d and a transverse abutting mating surface 1d. In the closed state, these surfaces contact each other and form an additional sealing interface. The addition of the transverse abutting surface 2d increases the contact area between the elastomer 2 and the fixed filter plate 1, better resisting the force F2 during the filtration process and reducing the risk of leakage at the fixing point, thereby further improving the sealing effect and overall reliability.

[0046] In this embodiment, referring to Figure 9 Combined with Figure 7 Based on the aforementioned fixed connection method of the elastomer 2, optionally, to distribute the applied force and prevent failure of the fixed points, at least one set of engaging force-bearing grooves d1 and force-bearing protrusions d2 are provided on the longitudinal mating surface 1c of the filter plate 1 and the longitudinal mating surface 2c of the elastomer 2. Specifically, the force-bearing grooves d1 can be formed on the longitudinal mating surface 1c, and the force-bearing protrusions d2 on the longitudinal mating surface 2c, or vice versa. During the membrane closing or filtration process, when the elastomer 2 is subjected to a longitudinal force F2, the grooves and protrusions engage with each other, distributing the force to multiple contact points. This design avoids force concentration in a single area, leading to deformation or damage, thereby maintaining sealing stability during the filtration process and extending the life of the elastomer 2.

[0047] In this embodiment, referring to Figure 10 Combined with Figure 7 Based on the aforementioned fixed connection method of the elastomer 2, optionally, to provide a deformation buffer space, the longitudinal fitting surface 2c of the elastomer 2 has at least one deformation buffer groove d3 that forms a gap with the longitudinal fitting surface 1c of the filter plate 1. Initially, the groove forms a gap. When the elastomer 2 is squeezed, the material deforms into the groove to fill the gap. After the buffer space is consumed, the longitudinal fitting surface 2c is completely fitted to the longitudinal fitting surface 1c. This buffering mechanism allows the elastomer 2 to deform flexibly during the initial membrane bonding process, preventing damage caused by hard impact. This allows for a smoother seal when F1 and F2 interact during the filtration process, improving seal reliability and the durability of the elastomer 2.

[0048] In this embodiment, referring to Figure 11 In another embodiment of the elastomer 2's fixation, based on an alternative fixed connection scheme, the elastomer 2 is connected to a fixing plate 4, which is then cast and molded onto the fixing plate 4. The fixing plate 4 is then fixedly connected to one side of the filter plate 1. Specifically, the elastomer 2 is integrally formed with the fixing plate 4 through a casting process (such as rubber casting), and the fixing plate 4 is then connected to the filter plate 1 by bolts or welding. This casting method provides a more secure bond between the elastomer 2 and the fixing plate 4, making it less susceptible to debonding due to F2 during the filtration process. Compared to mechanical fixing, casting provides more uniform stress distribution, thereby maintaining seal integrity over long-term use and reducing maintenance requirements.

[0049] In this embodiment, to ensure the reliability of the fixed connection, the fixing plate 4 has a fixing portion 41 that is not connected to the elastomer 2, and the fixing portion 41 and the filter plate 1 are fixedly connected by fasteners (such as bolts). The fixing portion 41 provides an additional connection surface, allowing the fastener to act directly on the filter plate 1 to achieve stable anchoring. This design enhances the overall structural strength. During the filtration process, when the elastomer 2 is subjected to F1 or F2, the fixing portion 41 can effectively transmit the applied force to prevent loosening, thereby improving the durability of the seal and the stability of the equipment. More specifically, the fixing plate 4 is provided with fixing portions 41 on the outer side and inner side of the corresponding elastomer 2. Because these two fixing portions 41 are spaced apart in the longitudinal direction, the fixation is more secure and reliable.

[0050] In this embodiment, based on flexibility considerations, one side of the filter plate 1 is fixedly connected to the corresponding elastomer 2, and the other side is not fixedly connected to the corresponding elastomer 2 (that is, the filter plates 1 of the filter plate group have the same structure), or both sides of the filter plate 1 are fixedly connected to the corresponding two elastomers 2, or both sides of the filter plate 1 are not fixedly connected to the corresponding two elastomers 2 (that is, the filter plates 1 in the filter plate group are divided into type A filter plates 1 and type B filter plates 1, and are arranged alternately).

[0051] Implementation 2:

[0052] In this embodiment, based on the overall performance of the filter press, a filter press includes the filter plate assembly described in Embodiment 1. This filter press utilizes all the technical features of the aforementioned filter plate assembly, such as the spaced arrangement of the multiple filter plates 1, the fixed connection method of the elastomer 2, and the sealing surface design. Thus, it inherits all the technical benefits, including higher sealing reliability, stability under the action of F1 and F2, prevention of misalignment leakage, reduced membrane closing power requirements, and extended service life. This improves efficiency, reduces leakage failures, and reduces energy consumption in industrial filter press applications.

[0053] Finally, it should be noted that the above implementation cases are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above implementation cases, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above implementation cases, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation cases of the present invention.

Claims

1. A filter plate assembly, characterized in that: It comprises a plurality of filter plates (1) arranged at intervals from each other, and an elastic body (2) located between any two adjacent filter plates (1), wherein the elastic body (2) is formed along edges adjacent to the corresponding two separators; The elastic body (2) and the corresponding two adjacent filter plates (1) are configured such that the elastic body (2) is fixedly connected to one of the filter plates (1), and is squeezed and adhered to the other filter plate (1) when the membrane is closed, so as to seal the filter press chamber formed between the two filter plates (1).

2. The filter plate assembly according to claim 1, characterized in that: When the membrane is completed, the elastic body (2) has at least two surfaces providing different sealing directions that are attached to the corresponding surface of the filter plate (1).

3. The filter plate assembly according to claim 1, characterized in that The longitudinal width of the elastic body (2) gradually decreases from one side fixed on a filter plate (1) to the other side.

4. The filter plate assembly according to claim 2, characterized in that: The elastomer (2) has a longitudinal sealing surface (2a) for relatively providing transverse sealing, and a transverse sealing surface (2b) for relatively providing longitudinal sealing. The side of the filter plate (1) not fixedly connected to the elastomer (2) has a longitudinal sealing mating surface (1a) for squeezing the longitudinal sealing surface (2a) and fitting with it when the membrane is closed. The side of the filter plate (1) not fixedly connected to the elastomer (2) has a transversely protruding first frame (11) at its edge. The first frame (11) has a transverse sealing mating surface (1b) for squeezing the transverse sealing surface (2b) for sealing and fitting with it when the membrane is closed.

5. The filter plate assembly according to claim 4, characterized in that: When the longitudinal sealing surface (2a) gradually approaches and fits onto the longitudinal sealing mating surface (1a) during the film closing process, a gap (s) is provided between the transverse sealing surface (2b) and the transverse sealing mating surface (1b).

6. The filter plate assembly according to claim 5, characterized in that: The gap (s) between the transverse sealing surface (2b) and the transverse sealing matching surface (1b) gradually decreases in a direction approaching the longitudinal sealing surface (2a).

7. The filter plate assembly according to claim 4, characterized in that: During the film closing process, when the longitudinal sealing surface (2a) gradually approaches and fits onto the longitudinal sealing fitting surface (1a), the transverse sealing surface (2b) fits onto the transverse sealing fitting surface (1b).

8. The filter plate assembly according to claim 4, characterized in that: The portion where the side surface (11a) of the first frame (11) and the transverse sealing matching surface (1b) are connected is configured as an arcuate surface (11b).

9. The filter plate assembly according to claim 4, characterized in that: When the longitudinal sealing surface (2a) gradually approaches and fits onto the longitudinal sealing fitting surface (1a) during the film closing process, the transverse sealing fitting surface (1b) has a portion that is not in contact with the longitudinal sealing surface (2a).

10. The filter plate assembly according to claim 1, characterized in that: When the membrane is combined, at least one surface of the elastic body (2) is pressed and adhered to the surface of the corresponding filter plate (1).

11. The filter plate assembly according to claim 10, characterized in that: The elastomer (2) has a longitudinal surface (2a') relative to the longitudinal direction and a transverse surface (2b') relative to the transverse direction; the side of the filter plate that is not fixedly connected to the elastomer (2) has a longitudinal mating surface (1a) corresponding to the longitudinal surface (2a'); the side of the filter plate that is not fixedly connected to the elastomer (2) has a transversely protruding first frame (11); the first frame (11) has a transverse mating surface (1b) corresponding to the transverse surface (2b'); when the film is completed, the longitudinal surface (2a') is attached to the longitudinal mating surface (2a) and a gap (s') is formed between the transverse surface (2b') and the transverse mating surface (1b); or, the transverse surface (2b') is attached to the transverse mating surface (1b) and a gap (s') is formed between the longitudinal mating surface (2a) and the transverse surface (2b').

12. The filter plate assembly according to claim 1, characterized in that The elastic body (2) has a longitudinal fitting surface (2c) fitted on the filter plate (1) fixedly connected thereto, and the side of the filter plate (1) fixedly connected to the elastic body (2) has a longitudinal fitting surface (1c) fitted with the longitudinal fitting surface (2c); the elastic body (2) is provided with a first insertion structure (m1) and a second insertion structure (m2) at the periphery and the inner periphery of the longitudinal fitting surface (2c), respectively; the filter plate (1) is fixedly connected to one side of the elastic body (2) and has a transversely protruding second frame (12) at its edge; a first slot (n1) plug-fitted with the first insertion structure (m1) is formed at the connection between the filter plate (1) and the second frame (12); a pressure ring (13) is fixedly connected to one side of the elastic body (2) and is longitudinally spaced from the first slot (n1) and used to press the filter cloth; the filter plate (1) and the pressure ring (13) form a second slot (n2) plug-fitted with the second insertion structure (m2).

13. The filter plate assembly according to claim 12, characterized in that: The elastic body (2) and the second frame (12) respectively have a transverse fitting surface (2d) and a transverse fitting matching surface (1d) that fit together.

14. The filter plate assembly according to claim 12, characterized in that At least one set of force-bearing grooves (d1) and force-bearing protrusions (d2) that are engaged with each other are provided on the longitudinal fitting surface (1c) of the filter plate (1) and the longitudinal fitting surface (2c) of the elastic body (2); the force-bearing grooves (d1) are formed on the longitudinal fitting surface (1c), and the force-bearing protrusions (d2) are formed on the longitudinal fitting surface (2c); or, the force-bearing grooves (d1) are formed on the longitudinal fitting surface (2c), and the force-bearing protrusions (d2) are formed on the longitudinal fitting surface (1c).

15. The filter plate assembly according to claim 12, characterized in that: The longitudinal fitting surface (2c) of the elastic body (2) is provided with at least one deformation buffer groove (d3) which forms a gap with the longitudinal fitting matching surface (1c) of the filter plate (1), and is used to provide a buffer deformation space when the elastic body (2) is squeezed.

16. The filter plate assembly according to claim 1, characterized in that The elastic body (2) is connected to a fixing plate (4), and the elastic body (2) is cast on the fixing plate (4), and the fixing plate (4) is fixedly connected to one side of the filter plate (1).

17. The filter plate assembly according to claim 14, characterized in that The fixing plate (4) has a fixing portion (41) that is not connected to the elastic body (2), and the fixing portion (41) and the filter plate (1) are fixedly connected via a fastener.

18. The filter plate assembly according to any one of claims 1 to 17, characterized in that: One side of the filter plate (1) is fixedly connected to the corresponding elastic body (2), and the other side is not fixedly connected to the corresponding elastic body (2); or, both sides of the filter plate (1) are fixedly connected to the two corresponding elastic bodies (2); or, both sides of the filter plate (1) are not fixedly connected to the two corresponding elastic bodies (2).

19. A filter press, characterized in that: The filter plate assembly comprises the filter plate assembly according to any one of claims 1 to 18.

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