Elastic filter plate for filter press

Abstract

The utility model relates to an elastic filter plate for a filter press, which belongs to the technical field of filter pressing equipment and comprises a metal intermediate plate, elastic frames are arranged on two sides of the metal intermediate plate, a metal frame mounted on the metal intermediate plate is arranged on the outer side of each elastic frame, and a drainage part is arranged on the metal intermediate plate. Corresponding elastic bosses are arranged on the two sides of the metal middle plate. The filter press has the effects of improving the filter pressing effect of the filter press and reducing the filter pressing cost.

Description

Technical Field

[0001] This application relates to the field of filter press equipment, and more particularly to an elastic filter plate for a filter press. Background Technology

[0002] Filter presses are widely used in environmental protection, chemical, and mining industries. Filter presses typically use polymer materials to make the filter plates. With continuous technological advancements, the requirements for the moisture content of the filter cake after pressing are becoming increasingly stringent, thus requiring greater pressing pressure from filter presses.

[0003] An ultra-high pressure diaphragm filter press is a solid-liquid separation device with a pressing pressure greater than 3 MPa. The filtration unit mainly consists of filter plates or diaphragm filter plates and filter cloth. Filter cloth is a primary filtration medium, and its selection and use play a decisive role in the filtration effect. The filter cloth covers both sides of the filter plate. When diaphragm filter plates are required, a set of filter plates consists of diaphragm filter plates and corresponding chamber plates. The base plate of the diaphragm filter plate is covered with non-metallic diaphragms on both sides, and the outer edge of the diaphragms is covered with filter cloth. When the filter cake needs to be pressed again, high-pressure water or high-pressure air is introduced into the diaphragm interlayer to press the filter cake and reduce its moisture content.

[0004] Due to the thinness of the diaphragm and the limitations imposed by the material properties, there are insurmountable obstacles in terms of temperature and pressure resistance. Therefore, the service life of the diaphragm is short under high pressure and the cost of repair and replacement parts is high. Utility Model Content

[0005] In order to improve the filtration effect of filter press and reduce the filtration cost, this application provides an elastic filter plate for filter press.

[0006] The technical solution for an elastic filter plate for a filter press provided in this application is as follows:

[0007] An elastic filter plate for a filter press includes a metal intermediate plate, with elastic frames on both sides of the metal intermediate plate, a metal frame mounted on the outer side of the elastic frames, a drainage component on the metal intermediate plate, and corresponding elastic protrusions on both sides of the metal intermediate plate.

[0008] By adopting the above technical solution, when the filter press is closed, the two metal intermediate plates approach each other until the elastic frame abuts against each other. A filter chamber with variable volume is formed between the adjacent metal intermediate plates and the elastic frame. The squeezed water is discharged from the filter chamber through the drainage device. During the second pressing, the adjacent metal intermediate plates continue to approach each other. At this time, the elastic frame is squeezed, thereby reducing the volume of the filter chamber and further pressing, thereby improving the filtration effect of the filter press. At the same time, the elastic frame can be quickly replaced, making maintenance simple and cost-effective.

[0009] Optionally, a screw is provided between the metal frame and the metal intermediate plate, with the screw head inside one metal frame and the screw part passing through the metal intermediate plate and inside the other metal frame.

[0010] By adopting the above technical solution, the metal frame and the metal middle plate are fixedly connected by screws, providing support for the metal middle plate and the elastic frame.

[0011] Optionally, the elastic frame and the metal intermediate plate are provided with through holes that penetrate both of them. A fixing bolt that penetrates the metal intermediate plate is provided in the through hole. The nut of the fixing bolt is located in one elastic frame, and a nut that mates with the fixing bolt is provided in the other elastic frame.

[0012] By adopting the above technical solution, the elastic frame is quickly fixed to the metal middle plate.

[0013] Optionally, the elastic frame has a countersunk groove with a through hole, and the nuts of the nut and the fixing bolt are both set in the countersunk groove, and a sealing cap for sealing the countersunk groove is also provided in the countersunk groove.

[0014] By adopting the above technical solution, the sealing cap blocks the countersunk groove, so that when pressing the filter cake, the pulp water will not enter the through hole through the countersunk groove, thereby protecting the bolts and nuts.

[0015] Optionally, a connector is provided between the corresponding elastic bosses on both sides of the metal intermediate plate. The connector includes a positioning rod on one of the elastic bosses, a positioning groove on the other corresponding boss, a limiting block on the positioning rod, and a limiting groove at the bottom of the positioning groove that matches the limiting block.

[0016] By adopting the above technical solution, two corresponding elastic protrusions are located on both sides of the metal intermediate plate, and the positioning rod is inserted into the positioning groove until the limiting block is engaged in the limiting groove, thereby locking the two corresponding protrusions on the metal intermediate plate.

[0017] Optionally, the drainage component includes filter screens abutting against both sides of the metal intermediate plate, a filter cloth abutting against the side of the filter screen away from the metal intermediate plate, the edges of the filter screens being pressed against the metal intermediate plate by elastic frames, the filter cloth being fitted along the outer wall of the elastic frames, an annular drainage groove being provided on the side of the elastic frames abutting against the filter cloth, a drainage hole communicating with the drainage groove being provided on the metal frame, and a water receiving groove communicating with all the drainage holes being provided below the drainage hole.

[0018] By adopting the above technical solution, the squeezed water enters the filter screen through the filter cloth and flows into the drainage tank along the space supported by the filter screen. Then, it enters the water receiving tank through the drainage hole and is discharged.

[0019] Optionally, a feed inlet is provided on the metal intermediate plate, and filter cloth clamps are provided on both sides of the feed inlet to press the filter cloth onto the metal intermediate plate. A connecting bolt is provided between the two filter cloth clamps to pass through and fix the two.

[0020] By adopting the above technical solution, the slurry enters the filter chamber through the feed inlet, and the filter cloth is clamped at the feed inlet to fix the filter cloth and prevent it from shifting.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] During the secondary pressing, the adjacent metal intermediate plates continue to move closer to each other. At this time, the elastic frame is squeezed, thereby reducing the volume of the filter chamber and further pressing, thus improving the filtration effect of the filter press. The filter plate can be quickly repaired by replacing the elastic frame, which is simple and low cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application.

[0025] Figure 3 yes Figure 2 Enlarged schematic diagram of part A in the middle.

[0026] Figure 4 yes Figure 2 Enlarged schematic diagram of section B.

[0027] Figure 5 This is a schematic diagram of the connection structure between the elastic boss and the connector in an embodiment of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Metal intermediate plate; 2. Elastic frame; 21. Drainage groove; 3. Through hole; 31. Countersunk groove; 32. Sealing cap; 4. Fixing bolt; 41. Nut; 5. Metal frame; 51. Screw; 52. Drainage hole; 53. Feed inlet; 54. Filter cloth clamp; 6. Drainage component; 61. Filter cloth; 62. Filter screen; 7. Elastic boss; 8. Water receiving groove; 9. Connecting component; 91. Positioning rod; 92. Positioning groove; 93. Limiting block; 94. Limiting groove. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] This application discloses an elastic filter plate for a filter press. (Refer to...) Figure 1 , Figure 2 and Figure 3A type of elastic filter plate for a filter press includes a metal intermediate plate 1, with rectangular elastic frames 2 on both sides of the metal intermediate plate 1. Both the elastic frames 2 and the metal intermediate plate 1 have through holes 3, and the elastic frames 2 and the through holes 3 on the metal intermediate plate 1 correspond one-to-one.

[0031] The elastic frame 2 has countersunk grooves 31 that correspond one-to-one with and connect to the through holes 3. A fixing bolt 4, penetrating the metal intermediate plate 1, is installed in the through hole 3. The nut 41 of the fixing bolt 4 is located in the countersunk groove 31 within one elastic frame 2, and a nut 41 is installed in the countersunk groove 31 within the other elastic frame 2. The fixing bolt 4 and the nut 41 are threaded together. A sealing cap 32 is also provided within the countersunk groove 31 to seal it. The sealing cap 32 seals the countersunk groove 31, thus preventing slurry from entering the through hole 3 through the countersunk groove 31 during filter cake pressing, thereby protecting the bolt and nut 41.

[0032] The outer side of the elastic frame 2 is provided with a metal frame 5 installed on the metal intermediate plate 1. The metal intermediate plate 1 is provided with a drainage component 6. Both sides of the metal intermediate plate 1 are provided with multiple elastic protrusions 7, and the elastic protrusions 7 on both sides of the metal intermediate plate 1 correspond one-to-one.

[0033] When the filter press is closed, the two metal intermediate plates 1 approach each other until the elastic frame 2 abuts against each other. A filter chamber with variable volume is formed between the adjacent metal intermediate plates 1 and the elastic frame 2. The filtrate is discharged from the filter chamber through the drain 6. During the secondary pressing, the adjacent metal intermediate plates 1 continue to approach each other. At this time, the elastic frame 2 is squeezed, thereby reducing the volume of the filter chamber and further pressing the filter cake. When the elastic frame 2 is damaged, the sealing cap 32 can be opened, and the elastic frame 2 can be quickly replaced by removing the bolts and nuts 41.

[0034] A screw 51 is provided between the metal frame 5 and the metal intermediate plate 1. The nut of the screw 51 is inside one metal frame 5, and the screw head of the screw 51 passes through the metal intermediate plate 1 and is located inside the other metal frame 5. The metal frame 5 and the metal intermediate plate 1 are fixedly connected by the screw 51, providing support for the metal intermediate plate 1 and the elastic frame 2.

[0035] Reference Figure 2 , Figure 3 and Figure 4 The drainage component 6 includes filter screens 62 that abut against both sides of the metal intermediate plate 1. A filter cloth 61 abuts against the side of the filter screen 62 away from the metal intermediate plate 1. The edges of the filter screen 62 are pressed against the metal intermediate plate 1 by the elastic frame 2. The edges of the filter cloth 61 abut against the outer wall of the elastic frame 2. An annular drainage groove 21 is provided on the side of the elastic frame 2 that abuts against the filter cloth 61. A drainage hole 52 communicating with the drainage groove 21 is provided on the metal frame 5. A water receiving groove 8 communicating with all the drainage holes 52 is provided below the drainage hole 52.

[0036] The squeezed water enters the filter screen 62 through the filter cloth 61 and flows into the drain trough 21 along the space supported by the filter screen 62. Then it enters the water receiving trough 8 through the drain hole 52 and is discharged.

[0037] A feed inlet 53 is located in the middle of the metal intermediate plate 1. Filter cloth clamps 54 are provided on both sides of the feed inlet 53. The filter cloth clamps 54 press the filter cloth 61 and filter screen 62 onto the metal intermediate plate 1. A connecting bolt passes through and fixes the two filter cloth clamps 54 together. The slurry enters the filter chamber through the feed inlet 53, and the filter cloth clamps 54 fix the filter cloth 61 at the feed inlet 53 to prevent the filter cloth 61 from shifting.

[0038] Reference Figure 1 and Figure 5 A connector 9 is provided between the elastic protrusions 7 on both sides of the metal intermediate plate 1, connecting the two. The connector 9 includes a positioning rod 91 on one of the elastic protrusions 7, a positioning groove 92 on the other corresponding protrusion, a limiting block 93 on the positioning rod 91, and a limiting groove 94 at the bottom of the positioning groove 92 that matches the limiting block 93. The diameter of the limiting block 93 is slightly larger than the diameter of the positioning rod 91.

[0039] Two corresponding elastic bosses 7 are located on both sides of the metal intermediate plate 1. The positioning rod 91 is inserted into the positioning groove 92 until the limiting block 93 is engaged in the limiting groove 94. When the limiting block 93 reaches the limiting groove, the limiting block 93 expands, making it difficult for the limiting block to detach from the limiting groove, thereby fixing the positioning rod and the positioning groove together.

[0040] The implementation principle of an elastic filter plate for a filter press according to an embodiment of this application is as follows: when the elastic filter plates on the filter press approach each other, the elastic frames 2 on the adjacent metal intermediate plates 1 abut against each other and squeeze, thereby reducing the volume of the filter chamber and squeezing the filter cake. The squeezed water passes through the filter cloth 61 and flows along the filter screen 62 into the drain trough 21, and then enters the water receiving trough 8 through the drain hole 52.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A flexible filter plate for a filter press, characterized in that: The system includes a metal intermediate plate (1), with elastic frames (2) on both sides. A metal frame (5) mounted on the metal intermediate plate (1) is provided on the outer side of the elastic frames (2). A drainage component (6) is provided on the metal intermediate plate (1), and corresponding elastic protrusions (7) are provided on both sides of the metal intermediate plate (1). The drainage component (6) includes filter screens (62) abutting against both sides of the metal intermediate plate (1). A filter cloth (61) abuts against the side of the filter screen (62) away from the metal intermediate plate (1). The edges of the filter screen (62) are pressed tightly against the metal intermediate plate (1) by the elastic frames (2). The filter cloth (61) is attached to the outer wall of the elastic frame (2). The elastic frame (2) has an annular drainage groove (21) on one side that abuts the filter cloth (61). The metal frame (5) has a drainage hole (52) that connects to the drainage groove (21). Below the drainage hole (52) is a water receiving groove (8) that connects all the drainage holes (52). The metal intermediate plate (1) has a feed inlet (53). Both sides of the feed inlet (53) are provided with filter cloth clips (54) that press the filter cloth (61) onto the metal intermediate plate (1). The two filter cloth clips (54) are connected by a connecting bolt that passes through and fixes the two.

2. The elastic filter plate for a filter press according to claim 1, characterized in that: A screw (51) is provided between the metal frame (5) and the metal intermediate plate (1). The nut of the screw (51) is inside the metal frame (5), and the nail part of the screw (51) passes through the metal intermediate plate (1) and is installed inside the other metal frame (5).

3. The elastic filter plate for a filter press according to claim 2, characterized in that: The elastic frame (2) and the metal intermediate plate (1) are provided with through holes (3) that pass through both. A fixing bolt (4) that passes through the metal intermediate plate (1) is provided in the through hole (3). The nut of the fixing bolt (4) is located in one elastic frame (2), and a nut (41) that is connected to the fixing bolt (4) is provided in the other elastic frame (2).

4. The elastic filter plate for a filter press according to claim 3, characterized in that: The elastic frame (2) has a countersunk groove (31) with a through hole (3), and the nuts of the nut (41) and the fixing bolt (4) are both located in the countersunk groove (31). The countersunk groove (31) is also provided with a sealing cap (32) to seal the countersunk groove (31).

5. The elastic filter plate for a filter press according to claim 1, characterized in that: A connector (9) is provided between the elastic bosses (7) on both sides of the metal intermediate plate (1). The connector (9) includes a positioning rod (91) on one of the elastic bosses (7) and a positioning groove (92) on the other corresponding boss. A limiting block (93) is provided on the positioning rod (91) and a limiting groove (94) that matches the limiting block (93) is provided at the bottom of the positioning groove (92).

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