Frame plate type diaphragm filter press

Abstract

The utility model discloses a frame plate type diaphragm filter press which comprises a base, a rack is arranged above the base, the bottom of the rack is fixedly connected with a plurality of supporting legs, one end of the rack is provided with a hydraulic cylinder, the tail end of the output end of the hydraulic cylinder is fixedly connected with an extrusion plate, and the output end of the extrusion plate is fixedly connected with an air cylinder. A squeezing plate is fixedly connected to one end of the rack, fixing blocks are fixedly connected to the two sides of the squeezing plate, traction ropes are fixedly connected to the fixing blocks, a thrust plate is fixedly connected to the other end of the rack, a liquid inlet is formed in the thrust plate, a plurality of filter pressing pieces are installed on the rack, a liquid collecting tank is arranged below the rack, the liquid collecting tank is placed on a base, and a liquid outlet is formed in the base. And supporting blocks are fixedly connected to the inner walls of the top ends of the two sides of the liquid collecting tank correspondingly, and filter screens are placed on the supporting blocks. According to the utility model, each filter pressing piece can be detached so as to be independently cleaned, the sealing performance is good, suspension liquid is not easy to leak, and filtrate can be uniformly recycled and filtered.

Description

Technical Field

[0001] The utility model belongs to the technical field of diaphragm filter presses, in particular to a frame plate type diaphragm filter press. Background Art

[0002] The diaphragm filter press is a common solid-liquid separation equipment, widely used in chemical, pharmaceutical, metallurgical, food, environmental protection and other industries. It further squeezes the filter cake in the filter chamber through the action of the diaphragm, thereby achieving a more efficient solid-liquid separation effect. The frame-plate diaphragm filter press is a special type of diaphragm filter press, which combines the design of the frame and the plate to improve the filtration efficiency and processing capacity.

[0003] At present, there are some diaphragm filter presses on the market, such as a plate-and-frame diaphragm filter press with a publication number of CN221061858U disclosed on the China Patent Network. This diaphragm filter press can shorten the length of the machine body without changing the number of filter plates, or enable the filter press to arrange more filter plates without changing the length of the machine body. However, there are some defects and deficiencies that need to be improved: (1) After long-term use, the filter plates of the diaphragm filter press need to be cleaned, and some existing diaphragm filter presses adopt an integrated design, and the filter plates are fixed on the frame and are difficult to disassemble, which makes it inconvenient to clean each filter plate. The plates are cleaned separately; (2) Some existing diaphragm filter presses lack effective sealing measures. During the filter pressing operation, the suspension is easy to leak from the edge or sealing part of the filter plate, resulting in material waste and environmental pollution; (3) When the suspension is filtered, the squeezed filtrate needs to be uniformly recovered, and some particulate impurities often remain in the filtrate. Some existing diaphragm filter presses are difficult to effectively filter the impurities in the filtrate during recycling, which not only affects the purity of the filtrate, but also causes the impurities to accumulate for a long time and adhere to the inner wall of the recovery container, making it difficult to clean. Therefore, in view of the above problems, the frame plate diaphragm filter press provided by the utility model is of great significance. Utility Model Content

[0004] The utility model provides a frame-plate diaphragm filter press, which can introduce a suspension into each filter press through a liquid inlet, so that each filter press can be used to perform a filter press operation on the suspension, thereby achieving fixed separation of the suspension. After the filter press operation is completed, each filter press can be removed so that related components in the filter press can be cleaned separately; the gap between the filter plate and the diaphragm plate in each filter press can be filled by a sealing ring, thereby greatly improving the sealing performance of the filter press, and effectively avoiding the leakage of the suspension through the gap to cause material waste and environmental pollution; the filtrate generated in the filter press process can be uniformly recovered through the liquid collecting tank, and the filtrate can be filtered through the filter screen in the liquid collecting tank, so that the particulate impurities in the filtrate remain on the filter screen, which not only ensures the purity of the filtrate in the liquid collecting tank, but also effectively avoids the particulate impurities from accumulating for a long time after entering the liquid collecting tank and adhering to the inner wall of the liquid collecting tank and making it inconvenient to clean, thereby solving the problems in the background technology.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model discloses a frame-plate type diaphragm filter press, comprising a base, a frame is arranged above the base, a plurality of supporting legs are fixedly connected to the bottom of the frame, the bottoms of the supporting legs are fixedly connected to the base, a hydraulic cylinder is installed at one end of the frame, an extrusion plate is fixedly connected to the output end of the hydraulic cylinder, both sides of the extrusion plate are fixedly connected to fixing blocks, the fixing blocks are attached to the top of the frame, a traction rope is fixedly connected to the fixing blocks, a thrust plate is fixedly connected to the other end of the frame, a liquid inlet is provided on the thrust plate, a plurality of filter presses are installed on the frame, a liquid collecting tank is arranged below the frame, the liquid collecting tank is placed on the base, and the inner walls of the top ends of both sides of the liquid collecting tank are fixedly connected to supporting blocks, a filter screen is placed on the supporting blocks;

[0007] The filter press comprises a filter plate and a diaphragm plate, a filter chamber is provided inside the filter plate, a liquid inlet hole is provided at the center of the filter chamber, the center of the liquid inlet hole and the center of the liquid inlet are located on the same straight line, a plurality of liquid discharge pipes are provided at the bottom of the filter chamber, a sealing groove is provided at the end surface of the edge of the filter plate, and protrusions are fixedly connected to the outer walls of both sides of the filter plate, the protrusions are attached to the top of the frame, and rope rings are fixedly connected to the protrusions, and the traction ropes pass through the rope rings and are respectively tied to the rope rings. The diaphragm plate and the filter plate are both rectangular, and their lengths and widths are correspondingly equal. Both sides of the diaphragm plate and the filter plate are fitted on the inner walls on both sides of the frame. The top and bottom of the diaphragm plate and the filter plate are fixedly connected with a pair of mounting seats, and mounting holes are opened on the mounting seats. Screws are inserted into the mounting holes, and nuts matching with them are threadedly connected on the screws. The diaphragm plate is a frame plate structure, and a filter cloth is fixedly connected to its inner wall, and a sealing ring is arranged on the end face of the edge of the diaphragm plate.

[0008] Furthermore, the sealing ring is rectangular, and its outer and inner lengths and widths are respectively equal to the outer and inner lengths and widths of the sealing groove, and the thickness of the sealing ring is respectively equal to the depth of the sealing groove.

[0009] Furthermore, a plurality of extrusion blocks are fixedly connected to the inner wall of the filter plate. The extrusion blocks are located in the filter chamber and are hemispherical in shape. The extrusion blocks are distributed in a ring array with the liquid inlet hole as the center.

[0010] Furthermore, a pair of positioning frames are installed on the top of the frame, and the positioning frames are respectively located on the front and rear sides of the frame, and the top inner walls thereof are fitted on the tops of the fixing blocks and the protrusions, and the two ends of the positioning frames are L-shaped and have positioning holes, and bolts are inserted into the positioning holes, and the top surface of the frame is provided with a plurality of threaded grooves that cooperate with the bolts.

[0011] Furthermore, a plurality of buffer blocks are fixedly connected to one side of the extrusion plate and the thrust plate close to the filter press, and the buffer blocks are respectively located at four corners of the extrusion plate and the thrust plate.

[0012] Furthermore, a pair of card blocks are fixedly connected to the bottom of the liquid collecting tank, and a pair of card slots are opened on the surface of the base. The card slots and the card blocks are both rectangular, with correspondingly equal widths, and the center of each card slot corresponds one-to-one to the center of each card block.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] (1) When a frame-plate type diaphragm filter press of the utility model is in use, a suspension can be introduced into each filter press element through a liquid inlet, so that each filter press element can be used to perform a filter press operation on the suspension, thereby achieving fixed separation of the suspension. After the filter press operation is completed, each filter press element can be removed so that the relevant components in the filter press element can be cleaned separately;

[0015] (2) When the frame-plate type diaphragm filter press of the utility model is in use, the gap between the filter plate and the diaphragm plate in each filter press can be filled by the sealing ring, thereby greatly improving the sealing performance of the filter press and effectively avoiding the leakage of the suspension through the gap to cause material waste and environmental pollution;

[0016] (3) When the frame-plate diaphragm filter press of the utility model is in use, the filtrate generated during the filtration process can be uniformly recovered through the liquid collecting tank, and the filtrate can be filtered through the filter screen in the liquid collecting tank, so that the particulate impurities in the filtrate remain on the filter screen, which not only ensures the purity of the filtrate in the liquid collecting tank, but also effectively prevents the particulate impurities from accumulating for a long time after entering the liquid collecting tank and adhering to the inner wall of the liquid collecting tank, making it inconvenient to clean.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a structural schematic diagram of a frame plate type diaphragm filter press of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the base and the frame in the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the medium-pressure filter element of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the filter plate in the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the diaphragm plate in the utility model;

[0024] Figure 6 It is a structural schematic diagram of the positioning frame in the utility model;

[0025] Figure 7 It is a structural schematic diagram of the liquid collecting tank in the utility model;

[0026] Figure 8 It is a structural schematic diagram of the filter screen in the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Base; 2. Frame; 3. Support leg; 4. Hydraulic cylinder; 5. Extrusion plate; 6. Fixed block; 7. Traction rope; 8. Thrust plate; 9. Liquid inlet; 10. Liquid collecting tank; 11. Support block; 12. Filter screen; 13. Filter plate; 14. Diaphragm plate; 15. Filter chamber; 16. Liquid inlet hole; 17. Drain pipe; 18. Sealing groove; 19. Bump; 20. Rope ring; 21. Mounting seat; 22. Mounting hole; 23. Screw; 24. Nut; 25. Filter cloth; 26. Sealing ring; 27. Extrusion block; 28. Positioning frame; 29. ​​Positioning hole; 30. Bolt; 31. Threaded groove; 32. Buffer block; 33. Block; 34. Block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be understood that terms such as "relative", "one end", "inside", "lateral", "end", "two ends", "both sides", "front", "one end face", "the other end face" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] See also Figure 1-8As shown, a frame-plate diaphragm filter press of the utility model comprises a base 1, a frame 2 is arranged above the base 1, a plurality of supporting legs 3 are fixedly connected to the bottom of the frame 2, the bottoms of the supporting legs 3 are fixedly connected to the base 1, a hydraulic cylinder 4 is installed at one end of the frame 2, an extrusion plate 5 is fixedly connected to the output end of the hydraulic cylinder 4, both sides of the extrusion plate 5 are fixedly connected to fixed blocks 6, the fixed blocks 6 are attached to the top of the frame 2, and a traction rope 7 is fixedly connected to the fixed blocks 6, a thrust plate 8 is fixedly connected to the other end of the frame 2, a liquid inlet 9 is provided on the thrust plate 8, a plurality of filter presses are installed on the frame 2, and the frame 2 is provided with a collecting tank 10, which is placed on the base 1, and the inner walls of the top ends of both sides of the collecting tank 10 are fixedly connected with support blocks 11, and the support blocks 11 are placed with filter screens 12. The extrusion plate 5 can be driven to move toward the thrust plate 8 by driving the hydraulic cylinder 4. When the extrusion plate 5 contacts the filter press, the pressure applied by the extrusion plate 5 can make the filter presses fit together, so that the filter press can be used to filter the suspension. After the filter press operation is completed, the hydraulic cylinder 4 is driven to move in a direction away from the thrust plate 8, and the filter presses can be pulled apart by the traction rope 7, so that the filter presses can be removed separately later.

[0032] The filter press comprises a filter plate 13 and a diaphragm plate 14. A filter chamber 15 is provided inside the filter plate 13. A liquid inlet hole 16 is provided at the center of the filter chamber 15. The center of the liquid inlet hole 16 is located on the same straight line as the center of the liquid inlet port 9. A plurality of liquid discharge pipes 17 are provided at the bottom of the filter chamber 15. A sealing groove 18 is provided at the end surface of the edge of the filter plate 13. Both sides of the outer wall of the filter plate 13 are fixedly connected with protrusions 19. The protrusions 19 are attached to the top of the frame 2. Rope rings 20 are fixedly connected to the protrusions 19. The traction ropes 7 pass through the rope rings 20 and are respectively tied to the rope rings 20. The diaphragm plate 14 and The filter plates 13 are all rectangular, and their length and width are correspondingly equal, and the diaphragm plate 14 and the filter plate 13 are both attached to the inner walls of the two sides of the frame 2, and the diaphragm plate 14 and the filter plate 13 are fixedly connected with a pair of mounting seats 21 at the top and bottom, and the mounting seats 21 are provided with mounting holes 22, and screws 23 are inserted into the mounting holes 22. The screws 23 are threadedly connected with nuts 24 that match them. The screws 23 can be aligned with and pass through the corresponding mounting holes 22. At this time, the nuts 24 are threadedly connected to each screw 23 and tightened, and the filter plate 13 and the diaphragm plate can be fixedly connected by the mutual cooperation between the screws 23 and the nuts 24. 14 are fixed together and closely fitted to form a filter press. The diaphragm plate 14 is a frame plate structure, and a filter cloth 25 is fixedly connected to its inner wall. A sealing ring 26 is provided at the edge of the diaphragm plate 14. When the filter presses are fitted together, the suspension can be introduced into the filter chamber 15 of each filter plate 13 through each liquid inlet hole 16 through the liquid inlet port 9, and contact with the filter cloth 25 in each diaphragm plate 14. At this time, the suspension can be filtered through the filter cloth 25, so that the solid particles in the suspension are trapped on the filter cloth 25 and form a filter cake, and the filtrate flows out through the discharge pipe 17. The filtrate is collected in the liquid collecting tank 10 so that the filtrate can be uniformly recovered through the liquid collecting tank 10, thereby realizing the solid-liquid separation of the suspension. Before entering the liquid collecting tank 10, the filtrate will first contact the filter screen 12 on the support block 11. At this time, the filtrate can be filtered through the filter screen 12, so that the particulate impurities in the filtrate remain on the filter screen 12, which not only ensures the purity of the filtrate in the liquid collecting tank 10, but also effectively avoids the particulate impurities from accumulating for a long time after entering the liquid collecting tank 10 and adhering to the inner wall of the liquid collecting tank 10, which is inconvenient to clean. The filter screen 12 can be taken out from the liquid collecting tank 10 so that it can be cleaned regularly.

[0033] Among them, the sealing ring 26 is rectangular, and its outer and inner lengths and widths are respectively equal to the outer and inner lengths and widths of the sealing groove 18, and the thickness of the sealing ring 26 is equal to the depth of the sealing groove 18. The sealing ring 26 is made of elastic materials such as rubber and is fixed by glue or other means. When the filter plate 13 and the diaphragm plate 14 are tightly fitted, the sealing ring 26 can be aligned and inserted into the sealing groove 18. At this time, the sealing ring 26 can be used to fill the gap between the filter plate 13 and the diaphragm plate 14, thereby greatly improving the sealing performance of the filter press and effectively avoiding the leakage of the suspension through the gap to cause material waste and environmental pollution.

[0034] Among them, a plurality of extrusion blocks 27 are fixedly connected to the inner wall of the filter plate 13. The extrusion blocks 27 are located in the filter chamber 15 and are hemispherical. The extrusion blocks 27 are distributed in a ring array with the liquid inlet 16 as the center. When the suspension is filtered by the filter press and the filter chamber 15 is filled with filter cake, the filter cake in the filter chamber 15 can be further squeezed by each extrusion block 27, thereby effectively reducing the water content in the filter cake, thereby further improving the solid-liquid separation effect.

[0035] Among them, a pair of positioning frames 28 are installed on the top of the frame 2, and the positioning frames 28 are respectively located on the front and rear sides of the frame 2, and the top inner walls thereof are fitted on the tops of the fixing blocks 6 and the protrusions 19, and the two ends of the positioning frames 28 are L-shaped and have positioning holes 29, and bolts 30 are inserted into the positioning holes 29. The top surface of the frame 2 is provided with a plurality of thread grooves 31 that match the bolts 30, and the ends of the bolts 30 can be screwed into the corresponding thread grooves 31, so that the positioning frames 28 can be fixed on the frame 2 through the mutual cooperation between the bolts 30 and the thread grooves 31. At this time, the top inner wall of the positioning frame 28 can fit on the fixing blocks 6 and the protrusions 19 on both sides of the extrusion plate 5. The protrusions 19 on both sides of each filter plate 13 play a positioning role, thereby effectively improving the stability of the extrusion plate 5 and each filter press to prevent them from bumping and deflecting during movement. When the filter pressing operation is completed, the positioning frame 28 can be removed from the frame 2 by unscrewing the bolts 30, and then the traction rope 7 can be untied from each rope ring 20, and then each filter press can be removed from the frame 2. After that, the filter plate 13 and the diaphragm plate 14 in each filter press can be separated by unscrewing the screw 23 and the nut 24, and the filter cake in the filter chamber 15 can be taken out. At the same time, it is also convenient to clean the filter plate 13 and the diaphragm plate 14 in each filter press separately.

[0036] Among them, a plurality of buffer blocks 32 are fixedly connected to the side of the extrusion plate 5 and the thrust plate 8 close to the filter press. The buffer blocks 32 are respectively located at the four corners of the extrusion plate 5 and the thrust plate 8. The buffer blocks 32 are made of elastic materials such as rubber and are fixed by glue or other means. Each buffer block 32 can play a buffering and protective role to avoid direct contact between the extrusion plate 5 and the thrust plate 8 and the filter press to cause collision and wear.

[0037] Among them, a pair of blocks 33 are fixedly connected to the bottom of the liquid collecting tank 10, and a pair of slots 34 are opened on the surface of the base 1. The slots 34 and the blocks 33 are both rectangular, and their widths are correspondingly equal. The center of each slot 34 corresponds to the center of each block 33. When the liquid collecting tank 10 is placed on the base 1, each block 33 can be aligned and fit in the corresponding slot 34. At this time, the liquid collecting tank 10 can be fixed on the base 1 through the mutual cooperation between the block 33 and the slot 34 to prevent its position from shifting and affecting the recovery of the filtrate.

[0038] The circuits, electronic components and chip modules involved in the utility model are all existing technologies and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to software and methods.

[0039] The standard parts used in the application documents can all be purchased from the market. All the components in this application document can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art. The electrical components appearing in this article are all electrically connected to the external main controller and 220V AC power, and the main controller can be a conventional known device that controls the LED lamp body, etc.

[0040] The working principle of the utility model is:

[0041] When the utility model is in use, firstly, the electrical components in the diaphragm filter press are connected to the control switch and the power supply through the wires, and then the hydraulic cylinder 4 is driven to drive the extrusion plate 5 to move toward the thrust plate 8. When the extrusion plate 5 contacts the filter press, the pressure applied by the extrusion plate 5 can make the filter presses fit together, and then the suspension is introduced into the filter chamber 15 of each filter plate 13 through each liquid inlet hole 16 through the liquid inlet port 9, and contacts with the filter cloth 25 in each diaphragm plate 14. At this time, the suspension can be filtered through the filter cloth 25, so that the solid particles in the suspension are trapped on the filter cloth 25 and form a filter cake, and the filtrate flows down through the drain pipe 17 and is collected in the liquid collecting tank 10, so that the filtrate can be uniformly recovered through the liquid collecting tank 10, thereby realizing the solid-liquid separation of the suspension. Before entering the liquid collecting tank 10, the filtrate will first contact with the filter screen 12 on the support block 11, and at this time, the filter The mesh 12 can filter the filtrate so that the particulate impurities in the filtrate remain on the filter mesh 12, which not only ensures the purity of the filtrate in the sump 10, but also effectively prevents the particulate impurities from accumulating for a long time and adhering to the inner wall of the sump 10 after entering the sump 10, making it inconvenient to clean. The filter mesh 12 can be taken out from the sump 10 so that it can be cleaned regularly. When the filter pressing operation is completed, the hydraulic cylinder 4 is driven to move in a direction away from the thrust plate 8, and the traction rope 7 can be used to pull the various filter presses apart. Then, the positioning frame 28 is removed from the frame 2 by unscrewing the bolt 30, and the traction rope 7 is untied from each rope ring 20, so that each filter press can be removed from the frame 2, and then the filter plate 13 and the diaphragm plate 14 in each filter press can be separated by unscrewing the screw 23 and the nut 24, so that the filter cake in the filter chamber 15 can be taken out, and it is also convenient to clean the filter plate 13 and the diaphragm plate 14 in each filter press separately.

[0042] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A frame plate type diaphragm filter press, characterized in that: The invention comprises a base, a frame is arranged above the base, a plurality of supporting legs are fixedly connected to the bottom of the frame, the bottoms of the supporting legs are fixedly connected to the base, a hydraulic cylinder is installed at one end of the frame, an extrusion plate is fixedly connected to the output end of the hydraulic cylinder, fixed blocks are fixedly connected to both sides of the extrusion plate, the fixed blocks are attached to the top of the frame, and a traction rope is fixedly connected to the fixed blocks, a thrust plate is fixedly connected to the other end of the frame, a liquid inlet is provided on the thrust plate, a plurality of filter presses are installed on the frame, a liquid collecting tank is arranged below the frame, the liquid collecting tank is placed on the base, and support blocks are fixedly connected to the inner walls of the top ends of both sides of the liquid collecting tank, and a filter screen is placed on the support blocks; The filter press comprises a filter plate and a diaphragm plate, a filter chamber is provided inside the filter plate, a liquid inlet hole is provided at the center of the filter chamber, the center of the liquid inlet hole and the center of the liquid inlet are located on the same straight line, a plurality of liquid discharge pipes are provided at the bottom of the filter chamber, a sealing groove is provided at the end surface of the edge of the filter plate, and protrusions are fixedly connected to the outer walls of both sides of the filter plate, the protrusions are attached to the top of the frame, and rope rings are fixedly connected to the protrusions, and the traction ropes pass through the rope rings and are respectively tied to the rope rings. The diaphragm plate and the filter plate are both rectangular, and their lengths and widths are correspondingly equal. Both sides of the diaphragm plate and the filter plate are fitted on the inner walls on both sides of the frame. The top and bottom of the diaphragm plate and the filter plate are fixedly connected with a pair of mounting seats, and mounting holes are opened on the mounting seats. Screws are inserted into the mounting holes, and nuts matching with them are threadedly connected on the screws. The diaphragm plate is a frame plate structure, and a filter cloth is fixedly connected to its inner wall, and a sealing ring is arranged on the end face of the edge of the diaphragm plate.

2. A frame-plate type diaphragm filter press according to claim 1, characterized in that: The sealing ring is rectangular, and its outer and inner lengths and widths are respectively equal to the outer and inner lengths and widths of the sealing groove, and the thickness of the sealing ring is respectively equal to the depth of the sealing groove.

3. A frame-plate type diaphragm filter press according to claim 1, characterized in that: A plurality of extrusion blocks are fixedly connected to the inner wall of the filter plate. The extrusion blocks are located in the filter chamber and are hemispherical in shape. The extrusion blocks are distributed in a ring array with the liquid inlet hole as the center.

4. A frame-plate type diaphragm filter press according to claim 1, characterized in that: A pair of positioning frames are installed on the top of the frame, and the positioning frames are respectively located on the front and rear sides of the frame, and the top inner walls of the positioning frames are fitted on the tops of the fixing blocks and the protrusions. The two ends of the positioning frames are L-shaped and have positioning holes, and bolts are inserted into the positioning holes. The top surface of the frame is provided with a plurality of threaded grooves that match the bolts.

5. The frame-plate type diaphragm filter press according to claim 1, characterized in that: A plurality of buffer blocks are fixedly connected to one side of the extrusion plate and the thrust plate close to the filter press, and the buffer blocks are respectively located at the four corners of the extrusion plate and the thrust plate.

6. A frame-plate type diaphragm filter press according to claim 1, characterized in that: A pair of card blocks are fixedly connected to the bottom of the liquid collecting tank, and a pair of card slots are opened on the surface of the base. The card slots and the card blocks are both rectangular, with correspondingly equal widths, and the center of each card slot corresponds to the center of each card block.

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