Cloth clamping device, filter plate assembly and filter press

Abstract

The utility model provides a cloth clamper, filter plate subassembly and press filter relates to electrolytic manganese production filter equipment field, cloth clamper is used for setting in the filter plate center hole of filter plate, including two splint, sealing element and fastener, sealing element is set in the filter plate center hole, sealing element is provided with sealing element center hole, splint is provided with splint center hole, and the splint center hole is provided with the fastener. The two clamping plates are arranged on the two sides of the filter plate center hole to press filter cloth on the filter plate, the two clamping plates are attached to the sealing piece in a sealed contact mode, the sealing piece center hole is communicated with the two clamping plate center holes to form a material channel penetrating through the filter plate center hole, and the fastening piece penetrates through the two clamping plates and the sealing piece to lock the two clamping plates and the sealing piece. The fastening piece is located outside the material channel and is not prone to corrosion, and the end of the fastening piece can be exposed outside and is convenient to disassemble and assemble; the sealing piece isolates gas in the material channel from the inner wall of the center hole of the filter plate and the pressing position of the filter cloth and the filter plate, so that compressed gas cannot enter from a gap between the filter cloth and the pressing position of the filter plate, and the filter cloth is prevented from being blown to be broken.

Description

Technical Field

[0001] This utility model relates to the field of filtration equipment for electrolytic manganese production, and more specifically, to a cloth clamp, a filter plate assembly, and a filter press. Background Technology

[0002] In the electrolytic manganese production process, manganese ore needs to undergo crushing, screening, washing, leaching, filtration, and electrolysis. Among these steps, the filtration process requires the use of a filter press, with the chamber filter press being the most commonly used. The chamber filter press can be used for solid-liquid separation of suspended materials. It has multiple filter plate assemblies arranged in parallel. Each filter plate assembly includes a filter plate, filter cloth, and a cloth clamp. Both sides of the filter plate are covered with filter cloth, and the center hole of the filter cloth is aligned with the center hole of the filter plate. The cloth clamp is installed at the center hole of the filter plate and presses the filter cloth on both sides tightly onto the filter plate.

[0003] There are two main types of existing filter cloth clamps: one type uses two clamping plates spaced apart and located on opposite sides of a filter plate, connected by bolts to press the corresponding filter cloth onto the filter plate. Because the clamping plates are spaced apart and connected only by bolts, when air is introduced into the central hole of the filter plate to blow out the material, the gas enters between the filter plate and the filter cloth along the inner wall of the central hole, causing the filter cloth to tear. The other type has a threaded protrusion extending axially along the central hole on the end face of one clamping plate, and a threaded groove extending axially along the central hole on the end face of the other clamping plate. The threaded protrusion and the threaded groove cooperate to connect the two clamping plates, thus pressing the filter cloth onto the filter plate. However, this not only makes it easy for material from the central hole of the clamping plates to enter the threaded connection and cause corrosion, but also makes the threaded connection, located inside the filter cloth clamp, inconvenient for operators to observe, resulting in difficulty in disassembling and maintaining the filter cloth clamp. Utility Model Content

[0004] This invention aims to solve the technical problems of inconvenient disassembly and maintenance of the cloth clamp in existing electrolytic manganese pressure filter equipment, and the inability to prevent gas from entering between the filter plate and the filter cloth.

[0005] In a first aspect, this utility model provides a cloth clamp for installation at the central hole of a filter plate in a filter press. It includes two clamping plates, a sealing element, and fasteners. The sealing element is placed inside the central hole of the filter plate and has a central hole. The clamping plates have central holes. The two clamping plates are positioned on both sides of the central hole of the filter plate to press the filter cloth on the filter plate. Both clamping plates are in close, sealing contact with the sealing element. The central hole of the sealing element communicates with the central holes of the two clamping plates to form a material channel passing through the central hole of the filter plate. The fasteners pass through the two clamping plates and the sealing element to lock the three together.

[0006] Optionally, at least one of the clamping plates has a guide post extending axially along the central hole of the clamping plate on its end face near the seal. The central hole of the clamping plate passes through the guide post, and the guide post is inserted into the central hole of the filter plate and comes into contact with the seal.

[0007] Optionally, the seal has an annular boss surrounding the central hole of the seal on at least one end face facing the clamping plate, and the annular boss is inserted into the central hole of the clamping plate and in contact with the inner wall of the central hole of the clamping plate.

[0008] Optionally, the inner wall of the center hole of the clamping plate is provided with a connecting part that protrudes radially along the center hole of the clamping plate, and the outer wall of the annular boss is provided with a connecting groove, the connecting groove being inserted into the connecting part.

[0009] Optionally, the connecting part is provided with a first connecting hole extending axially parallel to the center hole of the clamping plate, the sealing member is provided with a second connecting hole communicating with the first connecting hole, and the fastener passes through the first connecting hole, the second connecting hole and the first connecting hole of one of the clamping plates in sequence.

[0010] Optionally, at least one of the clamps has friction patterns on its end face near the seal, the friction patterns being arranged along the circumferential outer edge of the clamp, the clamp being used to contact the filter cloth through the friction patterns.

[0011] Optionally, at least one of the clamping plates has a support block on the end face away from the seal, and a plurality of the support blocks are arranged circumferentially along the central hole of the clamping plate, forming a flow channel between adjacent support blocks.

[0012] Optionally, the seal includes two sub-seals, which are stacked and fitted together, with a central hole penetrating both sub-seals.

[0013] Secondly, this utility model proposes a filter plate assembly, including a filter plate, a filter cloth, and the aforementioned cloth clamp. The filter plate has a central hole, and the sealing element of the cloth clamp is located inside the central hole of the filter plate. The two clamps of the cloth clamp are used to be disposed on both sides of the central hole of the filter plate to press the filter cloth on the filter plate.

[0014] Thirdly, this utility model proposes a filter press, including the above-mentioned filter plate assembly.

[0015] The cloth clamp, filter plate assembly, and filter press of this utility model have at least the following advantages compared with the prior art:

[0016] The clamping plate has a central hole in the middle, meaning it is an annular clamping plate. When the filter cloth needs to be fixed to the filter plate using a cloth clamp, the sealing element can be placed inside the central hole of the filter plate first, and the two clamping plates can be placed on both sides of the filter plate. The two filter cloths are then pressed between the corresponding clamping plates and the filter plate, ensuring that both clamping plates are axially fitted and in sealing contact with the sealing element. Fasteners are then passed through the contact portions between the two clamping plates and the sealing element to lock the two clamping plates and the sealing element in place. At this point, each clamping plate can press the corresponding filter cloth onto the corresponding end face of the filter plate, thus fixing the filter cloth on the filter plate. Material can pass through the material channel formed by the connection between the central holes of the two clamping plates and the central hole of the sealing element, allowing it to enter the filter chamber from one side of the filter plate into the other side. Moreover, since materials such as electrolytic manganese leaching solution pass through the interior of the central holes of the two clamping plates and the central hole of the sealing element, the fasteners are positioned... The fasteners are located outside the center holes of the clamping plates and the seal, thus virtually eliminating the technical problem of fastener corrosion due to impurities seeping into the fastener connections, preventing disassembly. Furthermore, compared to the two clamping plates using threaded protrusions and grooves for threaded fixation, the fastener ends of this invention are exposed, facilitating fastener disassembly and maintenance of the cloth clamp. Additionally, because a seal is clamped between the two clamping plates, when air is blown into the material channel formed by the center holes of the two clamping plates and the seal to expel residual material, the seal isolates the gas from the inner wall of the filter plate's center hole and the filter cloth / filter plate clamping area. Gas cannot enter between the outer peripheral wall of the seal and the inner wall of the filter plate's center hole, and compressed gas cannot enter through the gap in the filter cloth / filter plate clamping area along the inner wall of the filter plate's center hole, effectively preventing the filter cloth from being torn. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of the filter plate assembly according to an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the filter plate assembly according to an embodiment of the present utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the fabric clamping device according to an embodiment of the present utility model;

[0021] Figure 5 This is an exploded structural diagram of the fabric clamp according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Clamping plate; 11. Clamping plate center hole; 12. Guide post; 13. Friction texture; 14. Support block; 15. Flow channel; 16. Connecting part; 161. First connecting hole; 2. Seal; 21. Seal center hole; 22. Annular boss; 221. Connecting groove; 23. Second connecting hole; 24. Sub-seal; 3. Fastener; 4. Filter plate; 41. Filter plate center hole; 42. Cavity; 5. Filter cloth; 51. Filter cloth center hole. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fitting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In addition, it should be noted that in the description of this utility model, the terms and nouns in each embodiment, such as "upper," "lower," "front," and "rear," which indicate the location, are only used to simplify the description of the positional relationship based on the accompanying drawings. They do not mean that the components and devices referred to must be operated in accordance with the specific location and limited operation, method, and structure in the specification. Such directional terms do not constitute a limitation on this utility model.

[0027] This paper establishes an XYZ coordinate system. It should be noted that the meanings of the X-axis, Y-axis, and Z-axis are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] like Figures 1-2As shown, a chamber filter press may include multiple filter plate assemblies arranged sequentially along the X-axis. The filter plate 4 of the filter plate assembly may be a square plate arranged along the YZ plane. The thickness direction of the filter plate 4 may be the X-direction. The filter plate 4 has a central hole 41 extending through the filter plate along the X-direction in the middle. The two end faces of the filter plate 4 along the X-direction are respectively provided with cavities 42. The cavities 42 are annular cavities arranged circumferentially along the central hole 41. The filter cloth 5 has a central hole 51 in the middle. The two filter cloths 5 are respectively located on both sides of the filter plate 4. The filter cloth's central hole 51 is aligned with the filter plate's central hole 41. The clamping plate 1 of the cloth clamp presses the filter cloth 5 axially onto the filter plate 4, with the outer circumferential edge of the filter cloth 5 adhering tightly to the outer circumferential edge of the filter plate 4. When the hydraulic pump pushes the filter plate assembly to press multiple filter plate assemblies together, a filter chamber is formed between two adjacent filter plates 4. That is, the material alternately passes through multiple filter chambers and the filter plate's central hole 41 to complete filtration. Afterward, the filter plate assemblies separate, and the filter cake (filtered solid impurities) in the filter chamber is discharged. In related technologies, during the filtration process of squeezing the filter plate assembly, some material remains in the filter plate's central hole and is not squeezed. When the filter cake is discharged, this material enters the filter cake, affecting its moisture content. The filter cake needs to be squeezed again to remove water before further processing. To avoid this problem, air needs to be introduced into the filter plate's central hole 41 during the squeezing of the filter cake to blow out the remaining material.

[0029] like Figures 1-4 As shown in the figure, a cloth clamping device according to an embodiment of the present invention is used to be installed at the central hole 41 of a filter plate 4. It includes two clamping plates 1, a sealing element 2, and a fastener 3. The sealing element 2 is placed inside the central hole 41 of the filter plate and has a sealing element central hole 21. The clamping plate 1 has a clamping plate central hole 11. The two clamping plates 1 are used to be installed on both sides of the central hole 41 of the filter plate to press the filter cloth 5 on the filter plate 4. Both clamping plates 1 are in close and sealed contact with the sealing element 2. The sealing element central hole 21 and the two clamping plate central holes 11 are interconnected to form a material channel through the central hole 41 of the filter plate. The fastener 3 passes through the two clamping plates 1 and the sealing element 2 to lock the three together.

[0030] Specifically, the filter plate central hole 41 can be a circular through hole, the clamping plate 1 can be an annular clamping plate with a circular clamping plate central hole 11 in its middle, and the sealing element 2 can be an annular sealing element with a circular sealing element central hole 21 in its middle. The sealing element 2 and the two clamping plates 1 are aligned in the same thickness direction, both along the X direction. The sealing element 2 is located between the two clamping plates 1. The sealing element central hole 21 is coaxially arranged with the two clamping plate central holes 11 and is interconnected. The outer peripheral wall of the sealing element 2 matches the inner wall shape of the filter plate central hole 41, making it convenient to insert the sealing element 2 into the filter plate central hole 41. The filter cloth 5 has a circular filter cloth central hole 51 in its middle. The filter cloth central hole 51 can be approximately the same diameter as the filter plate central hole 41. The axial directions of the filter cloth central hole 51, the filter plate central hole 41, the sealing element central hole 21, and the two clamping plate central holes 11 are all in the X direction. There are two filter cloths 5, located on both sides of the filter plate 4. The diameter of the central hole 11 of the clamping plate can be smaller than the outer diameter of the annular seal 2, so that the side of the clamping plate 1 along the X direction can contact the seal 2 to achieve axial fitting and sealing contact between the clamping plate 1 and the seal 2. In other cases, the two axial ends of the seal 2 can respectively extend into the corresponding central hole 11 of the clamping plate, and the circumferential outer wall of the seal 2 contacts the inner wall of the central hole 11 of the clamping plate to achieve radial fitting and sealing contact between the seal 2 and the clamping plate 1.

[0031] In this embodiment, when it is necessary to use a cloth clamp to fix the filter cloth 5 to the filter plate 4, the sealing member 2 can be placed in the central hole 41 of the filter plate first, and the two clamping plates 1 are placed on both sides of the filter plate 4 respectively. The two filter cloths 5 are pressed between the corresponding clamping plates 1 and the filter plate 4, and the two clamping plates 1 are in close and sealed contact with the sealing member 2. Then, the fasteners 3 pass through the contact parts of the two clamping plates 1 and the sealing member 2 in sequence to lock the two clamping plates 1 and the sealing member 2. At this time, each clamping plate 1 can press the corresponding filter cloth 5 onto the corresponding end face of the filter plate 4, thereby fixing the filter cloth 5 on the filter plate 4. The material can pass through the material channel formed by the connection between the central holes 11 of the two clamping plates and the central hole 21 of the sealing member, so as to enter the filter chamber on one side of the filter plate 4 from the filter chamber on the other side. Moreover, since the material, such as electrolytic manganese leaching solution, passes through the interior of the central holes 11 of the two clamping plates and the central hole 21 of the sealing member, the fasteners 3 are located in the middle of the clamping plates. The external parts of the core hole 11 and the central hole 21 of the seal will not experience the technical problem of the fastener 3 corroding and becoming unremovable due to impurities seeping into the connection of the fastener 3. Moreover, compared with the two clamping plates using threaded protrusions and grooves for threaded fixation, the end of the fastener 3 in this embodiment can be exposed, making it convenient to disassemble the fastener 3 to realize the disassembly and maintenance of the cloth clamp. In addition, since the seal 2 is clamped between the two clamping plates 1, when air is blown into the material channel formed by the central holes 11 of the two clamping plates and the central hole 21 of the seal to blow out the residual material, the seal 2 isolates the gas from the inner wall of the filter plate central hole 41 and the filter cloth and filter plate pressing area. The gas will not enter between the outer peripheral wall of the seal 2 and the inner wall of the filter plate central hole 41, and the compressed gas will not enter through the gap of the filter cloth and filter plate pressing area along the inner wall of the filter plate central hole 41, which can effectively prevent the filter cloth 5 from being blown apart.

[0032] like Figure 3 and Figure 5 As shown, optionally, at least one of the clamping plates 1 is provided with a guide post 12 extending axially along the central hole 11 of the clamping plate on the end face near the sealing member 2, the central hole 11 of the clamping plate passes through the guide post 12, and the guide post 12 is inserted into the central hole 41 of the filter plate and comes into contact with the sealing member 2.

[0033] Specifically, guide posts 12 can be provided on the end faces of the two clamping plates 1 facing each other, or guide posts 12 can be provided only on the end face of one clamping plate 1 near the other clamping plate 1. The guide post 12 passes through the central hole 11 of the clamping plate, that is, the guide post 12 is a hollow cylindrical structure. The guide post 12 is coaxially arranged with the central hole 11 of the clamping plate. The outer peripheral wall of the guide post 12 can match the inner wall shape of the central hole 41 of the filter plate, so that the guide post 12 can be inserted into the central hole 41 of the filter plate and fit against the inner wall of the central hole 41 of the filter plate.

[0034] In this embodiment, by setting guide posts 12 on the clamping plate 1, not only can the clamping plate 1 be smoothly inserted into the central hole 41 of the filter plate under the guidance of the guide posts 12, thus improving the installation efficiency of the cloth clamping device; but also the clamping plate 1 and the filter plate 4 can be positioned and assembled, improving the assembly accuracy of the clamping plate 1 and ensuring that the fasteners 3 can smoothly lock the two clamping plates 1 and the sealing element 2.

[0035] like Figure 3 and Figure 5 As shown, optionally, the sealing member 2 has an annular boss 22 surrounding the central hole 21 of the sealing member on at least one end face facing the clamping plate 1. The annular boss 22 is inserted into the central hole 11 of the clamping plate and is in contact with the inner wall of the central hole 11 of the clamping plate.

[0036] Specifically, the seal 2 may have annular bosses 22 on both ends along the X direction, or it may have annular bosses 22 on only one end face along the X direction. The annular bosses 22 are coaxially arranged with the central hole 21 of the seal, and the outer wall shape of the annular bosses 22 matches the inner wall shape of the central hole 11 of the clamping plate, so that the annular bosses 22 can be inserted into the central hole 11 of the clamping plate and fit against the inner wall of the central hole 11 of the clamping plate.

[0037] By providing an annular boss 22 coaxially arranged with the central hole 21 of the seal 2 on the end face of the seal 2, and inserting the annular boss 22 into the interior of the central hole 11 of the clamping plate along the X direction, the assembly of the clamping plate 1 and the seal 2 can be limited and guided to ensure the assembly accuracy of the clamping plate 1 and the seal 2. Moreover, the outer wall of the annular boss 22 matches the inner wall of the central hole 11 of the clamping plate, and the part of the end face of the seal 2 other than the annular boss 22 abuts against the corresponding part of the clamping plate 1, such as the end face of the guide post 12, thereby increasing the contact area between the clamping plate 1 and the seal 2, increasing the path length of gas leakage from the radial inside to the outside between the clamping plate 1 and the seal 2, and preventing gas from entering between the filter plate 4 and the filter cloth 5 along the space between the seal 2 and the central hole 41 of the filter plate during blowing, thus preventing the filter cloth 5 from being blown apart.

[0038] like Figures 3-5 As shown, optionally, the inner wall of the center hole 11 of the clamping plate is provided with a connecting part 16 that protrudes radially along the center hole 11 of the clamping plate, and the outer wall of the annular boss 22 is provided with a connecting groove 221, which is inserted into the connecting part 16.

[0039] Specifically, the connecting part 16 can be an arc-shaped protrusion to reduce the flow resistance of material when passing through the central hole 11 of the clamping plate. The connecting part 16 extends along the axial direction parallel to the central hole 11 of the clamping plate to be flush with the two end faces of the clamping plate 1. The annular boss 22 is provided with an arc-shaped connecting groove 221 that matches the connecting part 16. The groove opening of the connecting groove 221 faces away from the central axis of the central hole 21 of the seal. By using the insertion and engagement of the connecting part 16 and the connecting groove 221, relative rotation between the clamping plate 1 and the seal 2 can be avoided. This allows the connecting holes of the clamping plate 1 and the seal 2 (such as the first connecting hole 161 and the second connecting hole 23 mentioned later) to be aligned and positioned, which is beneficial for the rapid installation of the fastener 3 and can improve the assembly connection efficiency between the clamping plate 1 and the seal 2.

[0040] Multiple connecting parts 16 can be arranged at intervals along the circumference of the center hole 11 of the clamping plate. The connecting grooves 221 are arranged one-to-one with the connecting parts 16. By the insertion and cooperation of multiple connecting parts 16 with the connecting grooves 221, the connection stability between the clamping plate 1 and the sealing element 2 can be improved.

[0041] The connecting part 16 extends along the axial direction parallel to the center hole 11 of the clamping plate to be flush with the two end faces of the clamping plate 1, so that the first connecting hole 161 mentioned below can be set to be relatively long, ensuring that when the fastener 3 is connected to the first connecting hole 161 and the second connecting hole 23 on the seal 2, the clamping plate 1 and the seal 2 can be tightly connected together.

[0042] like Figure 5 As shown, optionally, the connecting part 16 is provided with a first connecting hole 161 extending axially parallel to the center hole 11 of the clamping plate, and the sealing member 2 is provided with a second connecting hole 23 communicating with the first connecting hole 161. The fastener 3 passes through the first connecting hole 161 of one clamping plate 1, the second connecting hole 23 of the sealing member 2 and the first connecting hole 161 of the other clamping plate 1 in sequence, so as to achieve clamping and fixing of the two clamping plates 1 and the sealing member 2.

[0043] Specifically, the first connecting hole 161 can be an internal threaded hole, the second connecting hole 23 can be an internal threaded hole, and the fastener 3 can be a bolt. By passing the bolt through the first connecting hole 161, the second connecting hole 23 of one of the clamping plates 1 and the first connecting hole 161 of the other clamping plate 1 in sequence, the two clamping plates 1 and the sealing element 2 can be clamped and fixed. The installation method is simple, and the head of the bolt can protrude from the first connecting hole 161 for easy disassembly.

[0044] In some embodiments, the fastener 3 may also be a connecting rod.

[0045] In this embodiment, a protruding connecting portion 16 is provided on the inner wall of the center hole 11 of the clamping plate, and a first connecting hole 161 is provided on the connecting portion 16. In this way, while allowing the inner diameter of the center hole 11 of the clamping plate to be relatively large, it can be ensured that the first connecting hole 161 is close to the central axis of the center hole 11 of the clamping plate so as to be aligned with the second connecting hole 23 of the seal 2. Setting the inner diameter of the center hole 11 of the clamping plate to be relatively large, for example, larger than the inner diameter of the center hole 21 of the seal, is beneficial for the passage of materials.

[0046] like Figures 3-5 As shown, optionally, at least one of the clamping plates 1 is provided with friction texture 13 on the end face near the seal 2, the friction texture 13 is provided along the circumferential outer edge of the clamping plate 1, and the clamping plate 1 is used to contact the filter cloth 5 through the friction texture 13.

[0047] Specifically, friction patterns 13 can be provided on the end faces of the two clamping plates 1 that are close to each other, or friction patterns 13 can be provided only on the end face of one clamping plate 1 that is close to the other clamping plate 1. The friction patterns 13 can be spiral or annular. When friction patterns 13 are provided on the clamping plate 1 with guide post 12, the friction patterns 13 can be provided along the circumference of the guide post 12.

[0048] In this embodiment, the friction texture 13 is arranged near the outer circumferential edge of the clamping plate 1 so that the clamping plate 1 contacts the filter cloth 5 through the friction texture 13, which can increase the contact friction between the clamping plate 1 and the filter cloth 5 and ensure that the clamping plate 1 can stably press the filter cloth 5 onto the filter plate 4.

[0049] like Figures 3-5 As shown, optionally, at least one of the clamping plates 1 is provided with a support block 14 on the end face away from the seal 2, and a plurality of the support blocks 14 are arranged circumferentially along the central hole 11 of the clamping plate, and a flow channel 15 is formed between adjacent support blocks 14.

[0050] Specifically, support blocks 14 can be provided on the end faces of the two clamping plates 1 that are far apart from each other, or support blocks 14 can be provided only on the end face of one clamping plate 1 that is far apart from the other clamping plate 1. The support blocks 14 can be fan-shaped, and multiple support blocks 14 can be provided at intervals along the circumference of the clamping plates 1. When the two filter plate assemblies arranged side by side approach each other, the support blocks 14 on the two clamping plates 1 that are close to each other contact each other, so as to realize the assembly of the two filter plate assemblies.

[0051] A flow channel 15 is formed between adjacent support blocks 14. Material flowing out of the material channel of the cloth clamp can enter the filter chamber between adjacent filter plate assemblies along the flow channel 15 for subsequent pressure filtration.

[0052] The support block 14 extends radially toward the central axis of the center hole 11 of the clamping plate to connect with the corresponding connecting part 16. The first connecting hole 161 passes through the corresponding support block 14. This arrangement can increase the X-direction thickness of the connecting part 16 and ensure connection stability.

[0053] like Figures 3-5 As shown, optionally, the sealing element 2 includes two sub-sealing elements 24, which are stacked and fit together, and the central hole 21 of the sealing element passes through the two sub-sealing elements 24.

[0054] Specifically, the sub-seal 24 can be an annular gasket. Compared to the integrally formed seal 2, by configuring the seal 2 as two stacked sub-seals 24, the X-direction thickness of each sub-seal 24 can be set to be smaller, which facilitates processing and molding. The X-direction thickness of the two sub-seals 24 can be the same or different. The two sub-seals 24 fit together to prevent gas from entering between the outside of the two sub-seals 24 and the inner wall of the filter plate center hole 41 during air blowing, thus avoiding the problem of the filter cloth 5 being blown apart.

[0055] In some other embodiments, the seal 2 may include three sub-seals 24, which are sequentially fitted together.

[0056] like Figures 1-3 As shown, another embodiment of this utility model proposes a filter plate assembly for an electrolytic manganese filter press, including a filter plate 4, a filter cloth 5, and the aforementioned cloth clamp. The filter plate 4 has a central hole 41. The sealing element 2 of the cloth clamp is located inside the central hole 41. The two clamping plates 1 of the cloth clamp are arranged on both sides of the central hole 41 to press the filter cloth 5 on the filter plate 4. The clamping plate 1 has a central hole 11 in the middle, that is, the clamping plate 1 is annular. The inner circumferential edge of the clamping plate 1 can be pressed with the sealing element 2, and the outer circumferential edge of the clamping plate 1 can press the filter cloth 5 onto the filter plate 4. The advantages of this filter plate assembly compared to the prior art are the same as those of the aforementioned cloth clamp, and will not be repeated.

[0057] Another embodiment of this utility model provides a filter press, including the filter plate assembly described above. The filter press can be used for filtering electrolytic manganese leaching solution. The advantages of this filter press compared to the prior art are the same as those of the filter plate assembly described above, and will not be repeated here.

[0058] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A cloth clamp for use at the center hole (41) of the filter plate (4) of a filter press, characterized in that, The device includes two clamping plates (1), a sealing element (2), and a fastener (3). The sealing element (2) is placed inside the central hole (41) of the filter plate and has a central hole (21). The clamping plate (1) has a central hole (11). The two clamping plates (1) are used to be set on both sides of the central hole (41) of the filter plate to press the filter cloth (5) on the filter plate (4). Both clamping plates (1) are in close and sealed contact with the sealing element (2). The central hole (21) of the sealing element and the central holes (11) of the two clamping plates are interconnected to form a material channel through the central hole (41) of the filter plate. The fastener (3) passes through the two clamping plates (1) and the sealing element (2) to lock the three together.

2. The fabric clamp according to claim 1, characterized in that, At least one of the clamping plates (1) has a guide post (12) extending axially along the central hole (11) of the clamping plate on the end face near the seal (2), the central hole (11) of the clamping plate passes through the guide post (12), and the guide post (12) is inserted into the central hole (41) of the filter plate and comes into contact with the seal (2).

3. The fabric clamp according to claim 1, characterized in that, The sealing element (2) has an annular boss (22) surrounding the central hole (21) of the sealing element on at least one end face facing the clamping plate (1). The annular boss (22) is inserted into the central hole (11) of the clamping plate and is in contact with the inner wall of the central hole (11).

4. The fabric clamp according to claim 3, characterized in that, The inner wall of the center hole (11) of the clamping plate is provided with a connecting part (16) that protrudes radially along the center hole (11) of the clamping plate, and the outer wall of the annular boss (22) is provided with a connecting groove (221), which is inserted into the connecting part (16).

5. The fabric clamp according to claim 4, characterized in that, The connecting part (16) is provided with a first connecting hole (161) extending axially parallel to the center hole (11) of the clamping plate, and the sealing member (2) is provided with a second connecting hole (23) communicating with the first connecting hole (161). The fastener (3) passes through the first connecting hole (161), the second connecting hole (23) of one of the clamping plates (1) and the first connecting hole (161) of the other clamping plate (1) in sequence.

6. The fabric clamp according to claim 1, characterized in that, At least one of the clamps (1) has friction textures (13) on its end face near the seal (2), the friction textures (13) being arranged along the circumferential outer edge of the clamp (1), and the clamp (1) being used to contact the filter cloth (5) through the friction textures (13).

7. The fabric clamp according to claim 1, characterized in that, At least one of the clamping plates (1) has a support block (14) on the end face away from the seal (2), and a plurality of the support blocks (14) are arranged circumferentially along the central hole (11) of the clamping plate, and a flow channel (15) is formed between adjacent support blocks (14).

8. The fabric clamp according to claim 1, characterized in that, The sealing element (2) includes two sub-sealing elements (24), which are stacked and fit together, and the central hole (21) of the sealing element passes through the two sub-sealing elements (24).

9. A filter plate assembly, characterized in that, The filter includes a filter plate (4), a filter cloth (5), and a cloth clamp as described in any one of claims 1-8. The filter plate (4) has a central hole (41), the sealing element (2) of the cloth clamp is located inside the central hole (41), and the two clamps (1) of the cloth clamp are arranged on both sides of the central hole (41) of the filter plate to press the filter cloth (5) on the filter plate (4).

10. A filter press, characterized in that, Includes the filter plate assembly as described in claim 9.

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