Plate and frame filter press

Abstract

The present invention relates to a plate-frame filter press device, which includes a frame device and at least three filter press plates; the frame device includes a movable pressure plate, a fixed pressure plate and two support beams, and the movable pressure plate and the fixed pressure plate are both arranged between the two support beams; the support ears on both sides of the filter press plate are directly or indirectly placed on the top surface of the support beam; and also includes a linkage member; the linkage member includes an intermediate body, and linkage bodies are fixedly arranged at both ends of the intermediate body, and the diameter of the circumscribed circle of the cross section of the intermediate body is smaller than the diameter of the circumscribed circle of the linkage body; each support ear is provided with at least two through holes; the intermediate body passes through the through holes of the support ears of two adjacent filter press plates, and the linkage bodies at both ends of the intermediate body are respectively located on the outside of the support ears of the two filter press plates. The present invention only needs to pull one filter press plate to make each filter press plate open in turn, and the efficiency is high, and the structure of the linkage member and the through hole is simple, which is convenient for assembly.

Description

Technical Field

[0001] The invention relates to the technical field of plate and frame filter press devices, in particular to a plate and frame filter press device suitable for the production of aluminum sulfate and the like. Background Art

[0002] Plate and frame filter presses are used in the production of reagents such as aluminum sulfate and battery-grade iron phosphate due to their advantages of large filtration driving force, high solid content of filter cake, clear filtrate, high solid recovery rate, and low consumption of conditioning chemicals. For example, the plate and frame filter press disclosed in CN116983729A is used in the battery-grade iron phosphate filtration process.

[0003] CN111167195A discloses a plate filter press, including a body, an oil pump, a filter plate, and the oil pump is installed on the body. The filter plate is installed on the end shaft of the oil pump and moves axially along the oil pump. Positioning shafts are installed on both sides of the filter plate. Positioning rods are rotatably installed on the positioning shafts. Positioning blocks are installed at the ends of the positioning rods. Positioning seats are rotatably installed at both ends of the positioning blocks. The sides of the positioning seats are fixedly connected with a pressing plate, and the bottom of the pressing plate is in an arc shape. The plate filter press, through the connecting rod design of the positioning shaft and the positioning rod, allows the filter press to open the subsequent filter plates in stages by pulling the first filter plate during operation, so that the entire filter plate is opened and the filter cake falls in a linked state, thereby saving the time for opening the filter plate and removing the filter cake, and greatly improving the working efficiency of the equipment.

[0004] However, for the plate filter press disclosed in CN111167195A, the connecting rod design of the positioning shaft and the positioning rod requires the provision of a hinge shaft to achieve connection, which has a complex structure and is very inconvenient to assemble; and the filter plate can only translate and cannot swing to accelerate the detachment of the filter cake from the filter plate. Summary of the invention

[0005] An object of the present invention is to solve or alleviate the above technical problems.

[0006] The means adopted by the present invention is a plate and frame filter press device, which includes a frame device and at least three filter press plates; the frame device includes a movable pressure plate, a fixed pressure plate and two support beams, and the movable pressure plate and the fixed pressure plate are both arranged between the two support beams; the movable pressure plate has power along the length direction of the support beam; the fixed pressure plate is provided with an input pipe; the filter press plate is provided with a filter press chamber and a liquid passage hole, and support ears are fixedly provided on both sides of the filter press plate, and the support ears on both sides of the filter press plate are directly or indirectly placed on the top end surface of the support beam; it also includes a linkage member; the linkage member includes an intermediate body, and linkage bodies are fixedly provided at both ends of the intermediate body, and the diameter of the circumscribed circle of the cross-section of the intermediate body is smaller than the diameter of the circumscribed circle of the linkage body; each support ear is provided with at least two through holes; the intermediate body passes through the through holes of the support ears of two adjacent filter press plates, and the linkage bodies at both ends of the intermediate body are respectively located on the outside of the support ears of the two filter press plates.

[0007] The effect achieved by the present invention is that each filter press plate can be pulled apart in sequence only by pulling one filter press plate, the efficiency is high, and the structures of the linkage parts and the through holes are simple, which is convenient for assembly.

[0008] According to a further technical solution, each supporting ear is provided with at least three through holes, and the intermediate body exists in only two through holes of each supporting ear.

[0009] This solution enables the linkage parts to be staggered with each other, ensuring that the linkage parts will not interfere with each other in the direction along the intermediate body and ensuring that the opening gap is larger.

[0010] According to a further technical solution, both sides of the intermediate body are arranged as side planes that fit with the side walls of the through hole; and a swing gap is arranged between the through hole and the intermediate body.

[0011] This solution can realize the swing of the filter press plate and improve the efficiency of outputting filter cakes.

[0012] A further technical solution also includes a swing device; the swing device includes a swing rod that reciprocates along the length direction of the support beam, and the swing rod can be raised and lowered and is located above the filter press plate.

[0013] This solution can realize the reciprocating swing of each filter press plate and improve the efficiency of outputting filter cakes.

[0014] A further technical solution is that the swing device also includes a lifting guide rod, a guide member and a lifting frame with lifting power. The lifting guide rod is connected to the lifting frame in a linear sliding manner along the lifting direction, and the top of the lifting guide rod is provided with a limit head that abuts against the top surface of the lifting frame; the bottom of the lifting guide rod is connected to the guide member, and the lifting guide rod is provided with a lifting elastic member that can make the guide member have a tendency to approach the filter press plate, and the guide member is connected to the swing rod in a linear sliding manner along the swing rod; the lifting frame is provided with a lower extension plate, and one end of the swing rod is connected to a linear power device that is connected to the lower extension plate in a linear sliding manner along the lifting direction.

[0015] This solution can ensure the holding force of the swing rod on each filter press plate, and improve the reliability of the reciprocating swing of the filter press plate.

[0016] According to a further technical solution, a flexible pad is provided on the swing rod, and the flexible pad can abut against the top of the filter press plate.

[0017] This solution can ensure the holding force of the swing rod on each filter press plate, and improve the reliability of the reciprocating swing of the filter press plate.

[0018] A further technical solution is that the swing device also includes an anti-bending part with an opening at the bottom, which corresponds to the middle part of the swing rod when viewed from above; the bottom of part of the lifting guide rod is connected with an anti-bending part, and the lifting guide rod is provided with a lifting elastic part that can make the anti-bending part tend to approach the swing rod.

[0019] This solution can ensure that the swing rod is roughly in a straight line, preventing the middle part of the swing rod from bending and being unable to abut against the top end of the filter press plate.

[0020] According to a further technical solution, the bottom end of the supporting ear is the supported part, the width of the cross section of the supported part gradually decreases from top to bottom and is in direct contact with the supported part and the top end surface of the supporting beam; or the supported part is hinged with a roller and is in direct contact with the top end surface of the supporting beam.

[0021] This solution enables the supporting ears and the filter press plate to swing back and forth around the supported portion more easily.

[0022] According to a further technical solution, all the through holes of each supporting ear are located at the same height.

[0023] This solution can prevent the intermediate bodies in the through holes at different heights from interfering with the swinging of the filter press plate.

[0024] A further technical solution also includes a plate pulling device; the plate pulling device includes a plate pulling elastic member, a plate pulling power carrier and a plate pulling trolley provided with a pushing claw; the plate pulling power carrier has power along the length direction of the support beam; the two ends of the plate pulling elastic member are respectively connected to the plate pulling trolley and the plate pulling power carrier so that the plate pulling trolley has a tendency to move away from the fixed pressure plate.

[0025] This solution can ensure that the filter press plate opens a larger gap when it swings back and forth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of a plate and frame filter press according to an embodiment of the present invention Figure 1 .

[0027] Figure 2 Schematic diagram of a plate and frame filter press according to an embodiment of the present invention Figure 2 .

[0028] Figure 3 It is a schematic rear view of a plate and frame filter press device according to an embodiment of the present invention.

[0029] Figure 4 It is a three-dimensional exploded schematic diagram of the filter press plate 2 and the linkage member 3.

[0030] Figure 5 It is a three-dimensional schematic diagram of the linkage member 3.

[0031] Figure 6 It is a three-dimensional schematic diagram of the support ear 21.

[0032] Figure 7 2 is a front view of the support ear 21.

[0033] Figure 8 yes Figure 4 AA cross-sectional diagram of the present invention, but the filter plate 2 and the linkage 3 are not decomposed and are not Figure 4 The status displayed is different.

[0034] Fig. 9 yes Figure 8 Schematic diagram of the BB cross section.

[0035] Fig.10 It is a perspective schematic diagram of part of the plate pulling device 4.

[0036] Fig.11 It is a three-dimensional schematic diagram of the guide member 53 and the lifting guide rod 55.

[0037] Fig.12 It is a three-dimensional schematic diagram of the anti-bending member 54 and the lifting guide rod 55.

[0038] Fig.13 yes Figure 1 An enlarged schematic diagram of point C.

[0039] Fig.14 yes Figure 3 Schematic diagram of DD cross section.

[0040] Fig.15 yes Figure 8 BB cross-sectional diagram, in which there is an open gap 9 between the filter press plates 2 and Figure 8 The status displayed is different.

[0041] Arrow 1 ARR1; Arrow 2 ARR2; Arrow 3 ARR3; Line 1 LINE1; Line 2 LINE2; Frame device 1; Support beam 11; Movable pressure plate 12; Pressure plate power device 129; Fixed pressure plate 13; Inlet pipe 131; Liquid receiving tank 18; Liquid receiving tank plate rod 181; Liquid drain tank 19; Filter press plate 2; Support ear 21; Supported portion 211; Sinking tank 219; Through hole 22; Swinging gap 23; Filter press plate 1 271; Filter press plate 2 272; Filter press plate 3 273; Through hole 1 281; Through hole 2 282; Through hole 3 283; Filter press chamber 29; Liquid hole 2 91; functional part 292; linkage part 3; intermediate body 31; side plane 311; linkage body 32; swinging inclined plane 321; plate pulling device 4; plate pulling trolley 41; push claw 419; plate pulling power carrier 42; elastic part ear 421; plate pulling power chain 422; plate pulling power wheel 423; plate pulling cover 424; plate pulling elastic part 43; linear slide rail 49; swing device 5; swing rod 51; flexible pad 511; linear power device 519; lifting frame 52; lower extension plate 529; guide part 53; anti-bending part 54; lifting guide rod 55; limit head 551; lifting elastic part 552; open gap 9. DETAILED DESCRIPTION

[0042] The specific implementation of the present invention will be described below with reference to the accompanying drawings.

[0043] As a specific embodiment, the plate-frame filter press device of the embodiment of the present invention includes a frame device 1 and at least three filter press plates 2. It is easy to understand that, although theoretically there are at least two filter press plates 2, in the embodiment of two filter press plates 2, the filter press plates 2 can be opened by pulling one filter press plate 2, so there is no need for the embodiment of two filter press plates 2 to be opened in sequence, so the number of filter press plates 2 in this embodiment is greater than two, that is, greater than or equal to three.

[0044] The frame device 1 includes a movable pressing plate 12 , a fixed pressing plate 13 and two supporting beams 11 . The movable pressing plate 12 and the fixed pressing plate 13 are both arranged between the two supporting beams 11 .

[0045] The movable platen 12 has power to move along the length direction of the support beam 11. For example, the movable platen 12 is connected to the output end of a platen power device 129 such as a hydraulic cylinder or a pneumatic cylinder to have power.

[0046] The fixed pressing plate 13 is provided with an input pipe 131. The input pipe 131 is used to connect the input source of the filtrate to be pressed and input the filtrate to be pressed to the filter press plate 2 described later.

[0047] The filter press plate 2 is provided with a filter press cavity 29 and a liquid passage hole 291, and support ears 21 are fixedly provided on both sides of the filter press plate 2, and the support ears 21 on both sides of the filter press plate 2 are directly or indirectly placed on the top surface of the support beam 11. It should be noted that since the filter press plate 2 closest to the movable platen 12 is the last filter press plate 2 to which the filtrate is to be transported, the liquid passage hole 291 on the last filter press plate 2 is usually blocked to achieve the sealing of its filter press cavity 29. Therefore, for the last filter press plate 2, after the liquid passage hole 291 is opened on it, the liquid passage hole 291 is blocked, which should also be understood as the opening of the liquid passage hole 291. Of course, the liquid passage hole 291 on the last filter press plate 2 can also be blocked by the movable platen 12, so that the last filter press plate 2 actually has a liquid passage hole 291 (although this technical solution is not completely reasonable). Typically, a functional portion 292 used in the prior art to improve filtering effect is provided in the filter press chamber 29 , for example, the functional portion 292 is a protrusion or a filter bag.

[0048] Usually, the frame device 1 is provided with a liquid receiving tank 18 located below the filter press plate 2. The liquid receiving tank 18 is divided into two liquid receiving tank plates (not shown in the attached drawings). The two liquid receiving tank plates are fixedly connected with a liquid receiving tank plate rod 181. The liquid receiving tank plate rod 181 is connected to a motor, a cylinder, etc. so that the liquid receiving tank plate rod 181 and the liquid receiving tank plate are driven to rotate together. When the two liquid receiving tank plates rotate to be spliced ​​with each other, they are enclosed to form the liquid receiving tank 18. When the two liquid receiving tank plates rotate to be separated from each other, the liquid receiving tank 18 opens to allow the filter cake output between the filter press plates 2 to fall down to a conveyor belt, a vehicle, etc. (not shown in the attached drawings) through the space between the two liquid receiving tank plates.

[0049] Typically, a drain trough 19 is provided on the rack device 1 , and the drain trough 19 is used to receive liquid on the liquid receiving trough 18 .

[0050] It is easy to understand that, as mentioned above, the input pipe 131 is connected to the input source of the filtrate to be pressed and the filtrate to be pressed is input to the filter press plate 2 described later through the input pipe 131. The movable press plate 12 moves and abuts against the filter press plate 2, so that each filter press plate 2 can fit each other in sequence after moving on the support beam 11, and the filter press cavity 29 between two adjacent filter press plates 2 is sealed. The filtrate to be pressed transported by the input pipe 131 enters the filter press cavity 29 through the liquid hole 291 and is filtered, forming a filter cake in the filter press cavity 29 and a filtered liquid output to the outside of the filter press plate 2; the filtered liquid is output to the liquid receiving tank 18 and then flows into the liquid drain tank 19 and is transported to other processes. Generally, for some other embodiments, the filtered liquid can also be transported to other processes through the pipeline on the filter press plate 2, or transported to the liquid drain tank 19 through the faucet on the filter press plate 2. In short, the above technical scheme can realize the basic filter pressing function (the basic filter pressing function refers to inputting the filtrate to be pressed, forming a filter cake between two adjacent filter press plates 2, and outputting the filtered liquid). Therefore, it is easy for technical personnel in this field to think of continuing to add the above-mentioned unstated prior art on the basis of the above technical scheme to ensure the realization of the basic filter pressing function.

[0051] The plate-frame filter press device of the embodiment of the present invention further includes a linkage member 3; the linkage member 3 includes an intermediate body 31, and linkage bodies 32 are fixedly arranged at both ends of the intermediate body 31. The diameter of the circumscribed circle of the cross section of the intermediate body 31 (the cross section intercepted by a plane perpendicular to the axis of the intermediate body 31) is smaller than the diameter of the circumscribed circle of the linkage body 32. For example, the cross section of the linkage body 32 is rectangular, and the width of the cross section of the intermediate body 31 (such as Figure 5 The distance between the two side planes 311 shown in the figure is smaller than the length and width of the cross-sectional rectangle of the linkage body 32. For another example, when viewed along the axis direction of the intermediate body 31, the intermediate body 31 is completely located in the linkage body 32. Therefore, the intermediate body 31 can pass through the through hole 22 described later, but the linkage body 32 cannot pass through the through hole 22. The linkage body 32 can be detachably fixedly connected to the intermediate body 31 by screws, etc., so that the intermediate body 31 can pass through the through hole 22 described later.

[0052] like Fig. 9 As shown, for the convenience of explanation, the filter press plates 2 arranged in sequence are marked as filter press plate 1 271, filter press plate 2 272, and filter press plate 3 273; it is easy to understand that filter press plate 1 271, filter press plate 2 272, and filter press plate 3 273 are relative concepts, not absolute concepts; in other words Fig. 9 The positions of the filter press plate 1 271 , the filter press plate 2 272 , and the filter press plate 3 273 shown can be moved rightward as a whole by the position of one or more filter press plates 2 .

[0053] Each supporting ear 21 is provided with at least two through holes 22 .

[0054] The intermediate body 31 passes through the through holes 22 of the support ears 21 of two adjacent filter press plates 2, and the linkage bodies 32 at both ends of the intermediate body 31 are respectively located outside the support ears 21 of the two filter press plates 2. Fig. 9 As shown, the filter press plate 1 271 and the filter press plate 2 272 are two adjacent filter press plates 2, and the intermediate body 31 passes through the through hole 22 of the support ear 21 of the filter press plate 1 271 and the through hole 22 of the support ear 21 of the filter press plate 272. The linkage body 32 at the left end of the intermediate body 31 is located on the left side of the support ear 21 of the filter press plate 1 271, and the linkage body 32 at the right end of the intermediate body 31 is located on the right side of the support ear 21 of the filter press plate 272. It should be noted that Fig. 9 The middle filter plate 272 and the filter plate 3 273 are also two adjacent filter plates 2, but the support ears 21 of the two are not shown to be passed through by the intermediate body 31. The reason is that Fig. 9 The cross section shown does not show the intermediate body 31 of the support ears 21 connecting the two, so it is easy to understand that if Fig. 9 The displayed section is shifted to Figure 8 The position of the second linkage member 3 from left to right shown will show the linkage member 3 connecting the support ear 21 of the second filter press plate 272 and the support ear 21 of the third filter press plate 273.

[0055] The working principle is that when the filter press plate 2 needs to be opened and the filter cake between two adjacent filter press plates 2 is released, after the movable pressure plate 12 is retracted, the filter press plate 2 closest to the movable pressure plate 12 is pulled (by the plate pulling device 4 described later or other means) to move it away from the fixed pressure plate 13 until its supporting ear 21 abuts against the linkage body 32 at one end of the linkage member 3; the filter press plate 2 closest to the movable pressure plate 12 continues to move away from the fixed pressure plate 13 until the linkage body 32 at the other end of the linkage member 3 abuts against the second filter press plate 2 close to the movable pressure plate 12, so that the second filter press plate 2 close to the movable pressure plate 12 is also away from the fixed pressure plate 13, and an open gap 9 is formed between the first and second filter press plates 2 close to the movable pressure plate 12 (i.e., two adjacent filter press plates 2). The second filter press plate 2 close to the movable platen 12 continues to move away from the fixed platen 13 until an open gap 9 is formed between the second and third filter press plates 2 close to the movable platen 12 (usually, the support ears 21 are provided with sinking grooves 219 to increase the open gap 9). This process is repeated until each filter press plate 2 is opened in turn, and the filter cake between two adjacent filter press plates 2 falls from the open gap 9 for collection.

[0056] It can be seen from the above that the plate and frame filter press device of the embodiment of the present invention can pull the filter press plates 2 apart in sequence by only pulling one filter press plate 2, which is highly efficient, and the linkage member 3 and the through hole 22 have a simple structure and are easy to assemble.

[0057] As one of the specific implementations, Figure 8As shown, each support ear 21 is provided with at least three through holes 22, and only two through holes 22 of each support ear 21 have intermediate bodies 31 (it should be noted that Figure 8 The lowest filter press plate 2 is the filter press plate 2 closest to the fixed press plate 13. Figure 8 The uppermost filter press plate 2 in the figure is the filter press plate 2 closest to the movable platen 12. Although the intermediate body 31 exists in only one of the through holes 22 of the support ear 21 of the filter press plate 2 closest to the fixed platen 13, for the support ear 21 of the filter press plate 2, in order to realize the connection between the support ear 21 and the fixed platen 13, in fact, a linkage part 3 is also provided in one of the through holes 22 which is currently empty, but it is not shown in the figure. Therefore, for the support ear 21 of the filter press plate 2 closest to the fixed platen 13, it can also be understood that only two of the through holes 22 of each support ear 21 have the intermediate body 31. It is easy to understand that the support ear 21 of the filter press plate 2 closest to the movable platen 12 also has the same situation as the support ear 21 of the filter press plate 2 closest to the fixed platen 13, and it can also be understood that only two of the through holes 22 of each support ear 21 have the intermediate body 31). For the convenience of explanation, in Figure 8 The through holes 22 in the same row are marked from left to right as through hole 1 281, through hole 282, and through hole 3 283, but each support ear 21 only shows one of through hole 1 281, through hole 282, and through hole 3 283 to simplify the marking. This embodiment enables the linkage members 3 to be staggered (e.g. Figure 8 The left and right directions shown in the figure are staggered) to ensure that the linkage member 3 does not interfere in the direction along the intermediate body 31, and to ensure that the opening gap 9 is large. It should be noted that, if Figure 8 As shown, assuming that each support ear 21 is provided with at least two through holes 22, Figure 8 The through hole 3 283 shown will not exist; however, in order to connect two adjacent filter press plates 2 through the linkage member 3, the linkage member 3 of the through hole 3 283 is necessary, so Figure 8 The linkage member 3 in the third through hole 283 must be moved to the left to the other vacant through hole 22 . Obviously, this movement will cause the two linkage members 3 to overlap and generate interference in the direction along the intermediate body 31 .

[0058] As one of the specific embodiments, both sides of the intermediate body 31 are set as side planes 311 that fit with the side walls of the through hole 22; for example, the cross-section of the intermediate body 31 and the cross-section of the through hole 22 are both runway-shaped, so that both sides of the intermediate body 31 are side planes 311, and the side planes 311 fit with the side walls of the through hole 22. A swing gap 23 is set between the through hole 22 and the intermediate body 31. It is easy to understand that the intermediate body 31 can slide along the side plane 311, but cannot rotate around itself. When the filter press plate 2 is pushed, the swing gap 23 allows the intermediate body 31 to tilt in the through hole 22, so that the filter press plate 2 can swing and improve the efficiency of outputting filter cakes, etc.

[0059] As one of the specific implementations, the edge of the linkage body 32 close to the intermediate body 31 is provided with a swinging inclined surface 321, for example, the swinging inclined surface 321 is a surface formed by chamfering a right angle or a rounded angle. The edge of the linkage body 32 will not be stuck on the support ear 21, which can improve the reliability of the reciprocating swing of the filter press plate 2.

[0060] As one of the specific implementations, Fig.15 As shown, line 2 LINE2 represents the top surface of the support beam 11; arrow 1 ARR1 represents the approximate direction in which the swing rod 51 moves after abutting against the top of the filter press plate 2; arrow 2 ARR2 represents the approximate direction in which the top of the filter press plate 2 moves along with the swing rod 51; arrow 3 ARR3 represents the approximate direction in which the bottom of the filter press plate 2 moves. The plate-frame filter press device of the embodiment of the present invention further includes a swing device 5; the swing device 5 includes a swing rod 51 that reciprocates along the length direction of the support beam 11, and the swing rod 51 can be raised and lowered and is located above the filter press plate 2. The swing rod 51 is not limited to a cylindrical shape, but can also be other cylindrical shapes such as a square column. After each filter press plate 2 is pulled open in sequence, the pulling force for opening the filter press plate 2 closest to the movable plate 12 is stopped or reduced, and the swing rod 51 moves downward and abuts against the top of each filter press plate 2, and then the swing rod 51 moves roughly along the arrow one ARR1, so that the top of each filter press plate 2 moves roughly along the arrow two ARR2 due to the friction of the swing rod 51, so that the bottom end of the filter press plate 2 located below the supported portion 211 moves roughly along the arrow three ARR3. It is easy to understand that the swing rod 51 is a reciprocating motion, so when the swing rod 51 moves roughly in the opposite direction of the arrow one ARR1, the movement directions of the top ends of the above-mentioned filter press plates 2 and the bottom ends of the filter press plates 2 located below the supported portion 211 are also roughly opposite, so that the reciprocating swing of each filter press plate 2 can be achieved, thereby improving the efficiency of outputting the filter cake.

[0061] As one of the specific embodiments, the swing device 5 also includes a lifting guide rod 55, a guide member 53 and a lifting frame 52 with lifting power, for example, the lifting frame 52 is driven to lift by a lifting device such as a cylinder (the lifting device such as the cylinder is not shown in the figure); the lifting guide rod 55 is connected to the lifting frame 52 in a straight line sliding manner along the lifting direction, and the top of the lifting guide rod 55 is provided with a limit head 551 that abuts against the top surface of the lifting frame 52; the bottom of the lifting guide rod 55 is connected to the guide member 53, and the lifting guide rod 55 is provided with a lifting elastic member 552 that can make the guide member 53 have a tendency to approach the filter press plate 2, such as the lifting elastic member 5 52 is a spring and is sleeved on the lifting guide rod 55. The two ends of the spring respectively abut the bottom end surface of the lifting frame 52 and the guide member 53 so that the guide member 53 has a downward trend. The guide member 53 is connected to the swing rod 51 in a sliding manner along the length direction of the swing rod 51. For example, the guide member 53 is a linear bearing. The lifting frame 52 is provided with a lower extension plate 529. One end of the swing rod 51 is connected to a linear power device 519 that is linearly connected to the lower extension plate 529 in a lifting direction. For example, the linear power device 519 is a linear power device such as a cylinder. The lower extension plate 529 is linearly connected to the linear power device 519 through a linear slide rail. After the lifting frame 52 moves downward, the elastic force provided by the lifting elastic member 552 can ensure the abutment of the swing rod 51 on each filter press plate 2, thereby improving the reliability of the reciprocating swing of the filter press plate 2.

[0062] As one of the specific implementations, a flexible pad 511 is provided on the swing rod 51, and the flexible pad 511 can abut against the top of the filter press plate 2. For example, the flexible pad 511 is a rubber sleeve provided on the swing rod 51. The top of the filter press plate 2 can be slightly sunken into the flexible pad 511, which can ensure the abutting force of the swing rod 51 on each filter press plate 2 and improve the reliability of the reciprocating swing of the filter press plate 2.

[0063] As one of the specific embodiments, the swing device 5 also includes an anti-bending part 54 with a bottom opening (it is easy to understand that the anti-bending part 54 with a bottom opening will not touch the filter press plate 2), and the anti-bending part 54 corresponds to the middle part of the swing rod 51 when viewed from above; the bottom of part of the lifting guide rod 55 is connected with the anti-bending part 54, and the lifting guide rod 55 is provided with a lifting elastic part 552 that can make the anti-bending part 54 have a tendency to approach the swing rod 51, which can ensure that the swing rod 51 is roughly a straight line, preventing the middle part of the swing rod 51 from bending and failing to abut against the top of the filter press plate 2.

[0064] As one of the specific implementations, the bottom end of the supporting ear 21 is a supported portion 211. Fig.15 As shown, the width of the cross section of the supported portion 211 gradually decreases from top to bottom and the supported portion 211 is in direct contact with the top end surface of the support beam 11. For example, the cross section of the supported portion 211 is a circular segment ( Fig.15or the supported portion 211 is hinged with a roller and is in direct contact with the top end surface of the support beam 11, so that the supporting ear 21 and the filter press plate 2 can easily swing back and forth around the supported portion 211.

[0065] As one of the specific implementations, Figure 7 As shown, line LINE1 represents a straight line for reference; all through holes 22 of each support ear 21 (i.e., each support ear 21 is provided with at least three through holes 22) are located at the same height, which can prevent the intermediate bodies 31 in the through holes 22 at different heights from interfering with the swing of the filter press plate 2.

[0066] As one of the specific implementations, the plate and frame filter press device of the embodiment of the present invention also includes a plate pulling device 4; the plate pulling device 4 includes a plate pulling elastic member 43, a plate pulling power carrier 42 and a plate pulling trolley 41 provided with a pusher claw 419, and the plate pulling power carrier 42, the plate pulling trolley 41 and the pusher claw 419 are all prior art; at least a portion of the pusher claw 419 can be lifted and lowered to clamp the support ear 21 and release the support ear 21, and the pusher claw 419 can be hinged to the plate pulling trolley 41 and connected to a motor or a spring, etc., or can be fixed on a lifting cylinder, so that at least a portion of the pusher claw 419 can be lifted and lowered; the plate pulling power carrier 42 has a support along the support The power in the length direction of the beam 11, for example, a plate pulling power chain 422 is arranged on the side of the support beam 11, and the plate pulling power chains 422 on both sides of the support beam 11 are driven by the same plate pulling power wheel 423 to drive the plate pulling power carrier 42 to move synchronously, and a plate pulling cover 424 is fixedly arranged on the side of the support beam 11 as a protective cover of the plate pulling power chain 422, and also as a guide member such as a slide rail of the plate pulling power carrier 42; the two ends of the plate pulling elastic member 43 are respectively connected to the plate pulling trolley 41 and the plate pulling power carrier 42 (specifically, connected to the elastic member ear 421 referred to below) so that the plate pulling trolley 41 has a tendency to move away from the fixed pressure plate 13. For example, the plate-pulling trolley 41 and the plate-pulling power carrier 42 are connected by linear sliding rails 49 along the length direction of the support beam 11. The plate-pulling elastic member 43 is a spring that provides tension, and its two ends are respectively connected to the elastic member ear 421 and the plate-pulling trolley 41. The plate-pulling trolley 41 is located between the elastic member ear 421 and the fixed plate 13, so that the two ends of the plate-pulling elastic member 43 are respectively connected to the plate-pulling trolley 41 and the plate-pulling power carrier 42, so that the plate-pulling trolley 41 has a tendency to move away from the fixed plate 13. After the plate-pulling trolley 41 pulls the support ear 21 of the filter press plate 2 closest to the movable plate 12 and pulls each filter press plate 2 apart in sequence, the plate-pulling trolley 41 slightly returns to its original position and moves toward the fixed plate 13 (the deformation of the plate-pulling elastic member 43 is reduced), so that the tension of the plate-pulling trolley 41 on the filter press plate 2 is reduced, so that there is a tendency for two adjacent filter press plates 2 to move away from each other, which can ensure that the gap 9 opened when the filter press plate 2 swings back and forth is large.

[0067] The terms first, second, etc. used in the present invention do not indicate any order, quantity or importance, but are only used for distinction.

[0068] As used herein, the terms a, an, etc. do not denote a limitation of quantity, but rather denote the presence of at least one of the referenced object.

[0069] Terms indicating orientation or position as used in the present invention, such as top, bottom, side, longitudinal, lateral, middle, center, outside, inside, horizontal, vertical, left, right, above, below, etc., are intended to reflect relative positions rather than absolute positions.

[0070] As used in the present invention, the terms: generally, overall, approximately, close, etc., are limiting terms to indicate that a feature exists but a certain deviation is allowed. The amount of the certain deviation allowed may vary depending on the specific context; for example, the specific context that may depend on the deviation of a dimension includes but is not limited to the relevant standards of the dimension tolerance.

Claims

1. A plate-and-frame filter press device, comprising a frame device (1) and at least three filter press plates (2); the frame device (1) comprises a movable pressure plate (12), a fixed pressure plate (13) and two support beams (11), the movable pressure plate (12) and the fixed pressure plate (13) are both arranged between the two support beams (11); the movable pressure plate (12) has power along the length direction of the support beam (11); the fixed pressure plate (13) is provided with an input pipe (131); the filter press plate (2) is provided with a filter press cavity (29) and a liquid passage hole (291), and support ears (21) are fixedly provided on both sides of the filter press plate (2), and the support ears (21) on both sides of the filter press plate (2) are directly or indirectly placed on the top surface of the support beam (11); Its characteristics are: It also includes a linkage member (3), wherein a filter bag is arranged in the filter press cavity (29); the linkage member (3) includes an intermediate body (31), linkage bodies (32) are fixedly arranged at both ends of the intermediate body (31), and the diameter of the circumscribed circle of the cross section of the intermediate body (31) is smaller than the diameter of the circumscribed circle of the linkage body (32); each support ear (21) is provided with at least two through holes (22); the intermediate body (31) passes through the through holes (22) of the support ears (21) of two adjacent filter press plates (2), and the two ends of the intermediate body (31) The linkage bodies (32) are respectively located on the outside of the support ears (21) of the two filter press plates (2); both sides of the intermediate body (31) are arranged as side planes (311) that fit the side walls of the through hole (22); a swing gap (23) is arranged between the through hole (22) and the intermediate body (31); the cross-sections of the intermediate body (31) and the through hole (22) are both in the shape of a racetrack, so that both sides of the intermediate body (31) are side planes (311), and the side planes (311) fit the side walls of the through hole (22); The invention also comprises a swing device (5); the swing device (5) comprises a swing rod (51) which reciprocates along the length direction of the support beam (11), and the swing rod (51) can be lifted and lowered and is located above the filter press plate (2); the swing device (5) also comprises a lifting guide rod (55), a guide member (53) and a lifting frame (52) with lifting power, the lifting guide rod (55) is connected to the lifting frame (52) in a linear sliding manner along the lifting direction, and the top end of the lifting guide rod (55) is provided with a limit stop which abuts against the top end surface of the lifting frame (52). The bottom of the lifting guide rod (55) is connected to a guide member (53), and the lifting guide rod (55) is provided with a lifting elastic member (552) capable of causing the guide member (53) to have a tendency to approach the filter press plate (2). The guide member (53) is connected to the swing rod (51) in a linear sliding manner along the swing rod (51); the lifting frame (52) is provided with a lower extension plate (529), and one end of the swing rod (51) is connected to a linear power device (519) connected to the lower extension plate (529) in a linear sliding manner along the lifting direction.

2. The plate and frame filter press device according to claim 1, characterized in that: Each supporting ear (21) is provided with at least three through holes (22), and only two of the through holes (22) of each supporting ear (21) have intermediate bodies (31) in them.

3. The plate and frame filter press device according to claim 1, characterized in that: A flexible pad (511) is provided on the swing rod (51), and the flexible pad (511) can abut against the top end of the filter press plate (2).

4. The plate and frame filter press device according to claim 1, characterized in that: The swing device (5) further comprises an anti-bending member (54) with an opening at the bottom, wherein the anti-bending member (54) corresponds to the middle of the swing rod (51) when viewed from above; the bottom of a portion of the lifting guide rod (55) is connected to the anti-bending member (54), and the lifting guide rod (55) is provided with a lifting elastic member (552) capable of causing the anti-bending member (54) to have a tendency to approach the swing rod (51).

5. The plate and frame filter press device according to claim 1, characterized in that: The bottom end of the supporting ear (21) is a supported portion (211), the width of the cross section of the supported portion (211) gradually decreases from top to bottom and the supported portion (211) is in direct contact with the top end surface of the supporting beam (11); or the supported portion (211) is hinged with a roller and is in direct contact with the top end surface of the supporting beam (11).

6. The plate and frame filter press device according to claim 1, characterized in that: All through holes (22) of each supporting ear (21) are located at the same height.

7. The plate and frame filter press device according to claim 1, characterized in that: It also includes a plate pulling device (4); the plate pulling device (4) includes a plate pulling elastic member (43), a plate pulling power carrier (42) and a plate pulling trolley (41) provided with a pusher claw (419); the plate pulling power carrier (42) has power along the length direction of the support beam (11); the two ends of the plate pulling elastic member (43) are respectively connected to the plate pulling trolley (41) and the plate pulling power carrier (42) so that the plate pulling trolley (41) has a tendency to move away from the fixed pressure plate (13).

Images