Diatomite filter with filter plate easy to replace

Abstract

The utility model discloses a diatomaceous earth filter with easily replaced filter plates, which relates to the field of diatomaceous earth filters, and comprises a filter body, a plurality of plate frames and a pulling assembly for pulling the plurality of plate frames, the upper part of one side of the filter body in the length direction is provided with a feed port, and the lower part of the other side of the filter body is provided with a discharge port; a plurality of first sliding rails are uniformly and fixedly connected to the inner wall of the lower end face of the filter body, a plurality of second sliding rails are uniformly and fixedly connected to the inner wall of the upper end face of the filter body, the first sliding rails and the second sliding rails are distributed in the width direction of the filter body and matched with the plate frames, and the plate frames, the first sliding rails and the second sliding rails are in one-to-one correspondence. The device has the effects that a single filter plate can be replaced in a targeted manner, the operation difficulty of replacing the filter plate is reduced, and a single worker can complete the replacement of the filter plate.

Description

Technical Field

[0001] This utility model relates to the field of diatomaceous earth filters, and in particular to a diatomaceous earth filter with easily replaceable filter plates. Background Technology

[0002] Diatomaceous earth filters are precision filtration devices that use diatomaceous earth as the filter medium. They are characterized by high filtration accuracy, low operating costs, and long service life, and are widely used in industries such as food, beverage, chemical, and pharmaceutical. Diatomaceous earth filters are mainly divided into plate and frame diatomaceous earth filters, candle diatomaceous earth filters, and horizontal disc diatomaceous earth filters. Among them, plate and frame diatomaceous earth filters offer stable filtration and simple operation, making them suitable for applications where filtration cost and ease of operation are critical.

[0003] After a period of operation, the plate and frame diatomaceous earth filter needs to be removed and the filter plates replaced. Due to the accumulation of a large amount of impurities and high moisture content in the filter plates, and their heavy weight, replacement is inconvenient and labor-intensive. Utility model publication number CN222196134U discloses a plate and frame diatomaceous earth filter that sets up a filter frame inside the filter, with the plate frame placed inside. A turntable drives the filter frame and plate frame to rise, thereby allowing for the replacement and installation of the filter plates.

[0004] Regarding the aforementioned technologies, workers need to rotate the turntables on both sides of the filter machine simultaneously to raise the filter frame, which cannot be operated by a single person; after the filter frame rises, it will drive all the plates and frames to rise together, resulting in a large total weight, difficult operation, and inability to lift a specific plate or frame. Utility Model Content

[0005] In order to enable targeted replacement of individual filter plates, reduce the difficulty of filter plate replacement, and allow a single worker to complete the filter plate replacement, this application provides a diatomaceous earth filter with easy filter plate replacement.

[0006] This application provides a diatomaceous earth filter with easily replaceable filter plates, employing the following technical solution:

[0007] A diatomaceous earth filter with easily replaceable filter plates includes a filter body, several plate frames, and a pulling assembly for pulling the multiple plate frames. The filter body has an inlet on the upper part of one side along its length and an outlet on the lower part of the other side. Several first slide rails are uniformly fixedly connected to the inner wall of the lower end face of the filter body, and several second slide rails are uniformly fixedly connected to the inner wall of the upper end face of the filter body. The first and second slide rails are distributed along the width direction of the filter body and are adapted to the plate frames, with each plate frame, first slide rail, and second slide rail corresponding to the other. An operating door is rotatably connected to one side of the filter body along its width direction, and several first positioning grooves are uniformly formed within the wall thickness of the other side. The first positioning grooves are distributed along the length direction of the filter body and correspond to each plate frame, adapting to each other. Filter plates are detachably connected to the plate frames.

[0008] By adopting the above technical solution, the liquid to be filtered enters the filter from the feed inlet, and the filtered clear liquid flows out from the discharge outlet. After working for a period of time, when the filter plate needs to be replaced, the worker can open the operating door, pull out the plate frame and filter plate through the first and second slide rails, and then replace the filter plate. This allows for targeted replacement of a single filter plate and reduces the difficulty of replacing the filter plate, which can be completed by a single worker. At the same time, the worker can also pull out multiple plate frames at the same time by pulling the assembly, which improves work efficiency.

[0009] Optionally, the operating door includes a first door leaf and a second door leaf. Handles are fixedly connected to the outer sides of both the first and second door leaves. A first sealing strip adapted to the operating door is fixedly connected to the filter body. A second sealing strip is fixedly connected to the long edge of the first door leaf near the second door leaf.

[0010] By adopting the above technical solution, the operating door is a double door, which can reduce the space occupied in the width direction of the filter after the operating door is opened. The first sealing strip and the second sealing strip can enhance the airtightness of the entire filter and prevent liquid from leaking from the edge of the operating door during filtration.

[0011] Optionally, a pull groove is provided on the side of the plate frame near the operating door.

[0012] By adopting the above technical solution, when a worker needs to pull out a specific frame, pulling the groove makes it easier for the worker to apply force to the frame, making it easier to pull out.

[0013] Optionally, a first positioning hole is provided on the side of the lower end face of the plate frame near the first positioning groove. A positioning spring is fixedly connected to the plate frame. The positioning spring is located in the first positioning hole. A positioning block with a hemispherical end is fixedly connected to the other end of the positioning spring. The filter body is provided with a number of second positioning holes. The second positioning holes correspond one-to-one with the positioning blocks and are mutually compatible.

[0014] By adopting the above technical solution, when the plate frame is not pulled out, the positioning block is located in the positioning hole and the positioning spring is compressed. When the plate frame is pulled out, the positioning block corresponds to the second positioning hole, and the positioning spring applies a downward force to the positioning block. The positioning block enters the second positioning hole and the positioning block limits the plate frame in the length direction, which can prevent the plate frame from falling off the first slide rail during the pulling process.

[0015] Optionally, the pulling assembly includes a cylinder, a pulling rod, several pulling parts, a first connecting rod, and a rotating assembly. The cylinder is fixedly connected to the upper end face of the filter body and is arranged along the width direction of the filter body. The cylinder output shaft is rotatably connected to the first connecting rod through the rotating assembly. The pulling rod is arranged along the length direction of the filter body. The first connecting rod is fixedly connected to the middle of the pulling rod. The pulling rod has several first limiting slots. The pulling parts pass through the first limiting slots and are slidably connected to the pulling rod. The pulling parts, the first limiting slots, and the plate frame correspond one-to-one. The pulling parts and the plate frame are detachably connected.

[0016] By adopting the above technical solution, when workers need to pull out multiple frames at the same time, the first connecting rod is rotated to a vertical position by rotating the assembly. The pulling rod rotates with the first connecting rod to the side of the frame near the operating door. Then, multiple pulling parts are connected to the corresponding frames. The cylinder is activated, and the cylinder drives the first connecting rod, the pulling rod and the pulling parts, so that the frames connected to the pulling parts are moved out together, thus pulling out multiple frames at the same time.

[0017] Optionally, the pulling component includes a bending component, two positioning plates, a second connecting rod, and a limiting block. The two ends of the second connecting rod are fixedly connected to the bending component and the limiting block, respectively. The two ends of the bending component are fixedly connected to the positioning plates, respectively. A second positioning groove and two third positioning grooves that are adapted to the positioning plates are provided on the side of the plate frame near the operating door. The two third positioning grooves are located on both sides of the second positioning groove, and both third positioning grooves are connected to the second positioning groove.

[0018] By adopting the above technical solution, when a worker needs to connect the pull member to the corresponding plate frame, force can be applied to bring the two ends of the bent member closer together, causing the positioning plates to move closer together and pass through the second positioning groove. Then, the bent member is released to restore it to its original shape, causing the two positioning plates to enter the corresponding third positioning grooves, thereby connecting the pull member to the corresponding plate frame. When it is necessary to remove the pull member, force is applied again to bring the two ends of the bent member closer together, and then the positioning plates are removed from the second positioning groove, thus removing the pull member from the plate frame.

[0019] Optionally, the rotating assembly includes a U-shaped support frame and a rotating motor. The cylinder output shaft is fixedly connected to the support frame, the rotating motor is fixedly connected to the side of the support frame, the rotating motor output shaft passes through the support frame and is rotatably connected to the support frame, and the rotating motor output shaft is fixedly connected to the first connecting rod.

[0020] By adopting the above technical solution, the rotating motor can drive the first connecting rod, the pulling rod, and several pulling components to rotate simultaneously. When the pulling assembly is not needed, the first connecting rod, the pulling rod, and the pulling components are all located above the upper end face of the filter body. When the pulling assembly is needed, the rotating motor is started, and the first connecting rod is rotated to the vertical direction, so that the pulling rod and the pulling components are at the same height as the second positioning groove, which facilitates the fixing of the pulling components and the plate frame.

[0021] Optionally, two brackets adapted to the pull rod are fixedly connected to the upper end face of the filter body.

[0022] By adopting the above technical solution, when the pulling component is not needed, the rotating motor drives the first connecting rod, the pulling rod and several pulling parts to rotate above the upper end face of the filter body. The two brackets support the pulling rod, so that the pulling rod and the pulling parts will not press on the cylinder, thus avoiding damage to the cylinder.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. With the setting of the operating door, the first slide rail and the second slide rail, the worker can open the operating door, pull out the plate frame and filter plate through the first slide rail and the second slide rail, and then replace the filter plate. This allows for targeted replacement of a single filter plate and reduces the difficulty of replacing the filter plate. A single worker can complete the operation.

[0025] 2. By setting up the pull-up components, workers can simultaneously pull multiple panels through the operating door according to actual working conditions;

[0026] 3. With the setting of the first positioning hole, positioning spring, positioning block and second positioning hole, when the plate frame is not pulled out, the positioning block is located in the positioning hole and the positioning spring is compressed. When the plate frame is pulled out, the positioning block corresponds to the second positioning hole, the positioning spring applies a downward force to the positioning block, and the positioning block enters the second positioning hole. The positioning block limits the plate frame in its own length direction, which can prevent the plate frame from falling off the first slide rail during the process of being pulled out. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a diatomaceous earth filter that allows for easy replacement of filter plates.

[0028] Figure 2 This is a schematic diagram of the discharge port structure.

[0029] Figure 3 This is a cross-sectional view of the plate frame.

[0030] Figure 4 yes Figure 3 Enlarged diagram of part B.

[0031] Figure 5 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0032] Figure 6 This is a cross-sectional schematic diagram of the pull component.

[0033] Explanation of reference numerals in the attached drawings: 1. Filter body; 11. Feed inlet; 12. Discharge outlet; 13. First door leaf; 14. Second door leaf; 15. First positioning groove; 16. Handle; 17. First sealing strip; 18. Second sealing strip; 19. Support; 2. Plate frame; 21. Filter plate; 22. First slide rail; 23. Second slide rail; 24. Pulling groove; 31. First positioning hole; 32. Positioning spring; 33. Positioning block; 34. Second positioning hole; 4. Pulling assembly; 41. Cylinder; 42. Pulling rod; 421. First limiting through groove; 43. First connecting rod; 44. Support frame; 45. Rotating motor; 5. Pulling component; 51. Second connecting rod; 52. Limiting block; 53. Bending component; 54. Positioning piece; 55. Second positioning groove; 56. Third positioning groove. Detailed Implementation

[0034] The present application will be further described in detail below with reference to all the accompanying drawings.

[0035] This application discloses a diatomaceous earth filter with easily replaceable filter plates. Example

[0036] Reference Figure 1 and Figure 2 A diatomaceous earth filter with easily replaceable filter plates includes a filter body 1, several plate frames 2, and a pulling assembly 4 for pulling the multiple plate frames 2. The filter body 1 has an inlet 11 on the upper part of one side along its length and an outlet 12 on the lower part of the other side. The liquid to be filtered enters the filter through the inlet 11, and the filtered clear liquid exits from the outlet 12. Several first slide rails 22 are uniformly fixedly connected to the inner wall of the lower end face of the filter body 1. The first slide rails 22 are all evenly distributed along the width direction of the filter body 1 and are all adapted to the plate frames 2. The plate frames 2 can slide in the first slide rails 22 along the width direction of the filter body 1.

[0037] Reference Figure 1 and Figure 3A number of second slide rails 23 are evenly fixedly connected to the inner wall of the upper end face of the filter body 1. The second slide rails 23 are evenly distributed along the width direction of the filter body 1 and are adapted to the plate frame 2. The plate frame 2, the first slide rail 22, and the second slide rail 23 correspond one-to-one. The first slide rail 22 and the second slide rail 23 cooperate to fix the position of the plate frame 2 and prevent the plate frame 2 from shifting during filtration. An operating door is rotatably connected to one side of the filter body 1 in the width direction. The operating door includes a first door leaf 13 and a second door leaf 14. Handles 16 are fixedly connected to the outer sides of the first door leaf 13 and the second door leaf 14 (see reference). Figure 2 The worker pulls handle 16 (refer to) Figure 2 The operating door is a double door, which reduces the space occupied by the operating door in the width direction of the filter when it is opened. The filter body 1 is fixedly connected with a first sealing strip 17 that is adapted to the operating door. The first door leaf 13 is fixedly connected with a second sealing strip 18 near the long edge of the second door leaf 14. The first sealing strip 17 and the second sealing strip 18 can enhance the airtightness of the entire filter and prevent liquid from leaking from the edge of the operating door during filtration. The plate frame 2 is detachably connected with a filter plate 21. When the filter plate 21 needs to be replaced, the operating door is opened and the plate frame 2 is pulled outward along the direction of the first slide rail 22 so that the filter plate 21 is completely removed from the operating door and a new filter plate 21 can be replaced. The plate frame 2 has a pulling groove 24 on the side near the operating door. The worker puts his hand into the pulling groove 24 and pulls the plate frame 2 outward. The pulling groove 24 makes it easier for the worker to apply force to the plate frame 2, making the plate frame 2 easier to pull out. After installing the new filter plate 21, the filter plate frame 2 can be pushed into the filter machine to complete the replacement of the filter plate 21. This reduces the difficulty of replacing the filter plate 21, and can be completed by a single worker. Moreover, it allows for targeted replacement of a single filter plate 21.

[0038] Reference Figure 3 The filter is provided with several first positioning grooves 15 on the side wall away from the operating door. The first positioning grooves 15 are distributed along the length of the filter body 1. The first positioning grooves 15 correspond one-to-one with the plate frame 2 and are mutually compatible. When the plate frame 2 is not pulled out, the plate frame 2 is inserted into the first positioning groove 15 and does not affect the filtering function of the filter plate 21. When the plate frame 2 is pulled out and the filter plate 21 is moved out of the operating door, the end of the plate frame 2 near the first positioning groove 15 is still located in the first slide rail 22 and the second slide rail 23 and will not be completely detached from the filter, making it convenient for the worker to push the plate frame 2 back to its original position. The first positioning grooves 15 can help the first slide rail 22 and the second slide rail 23 fix the position of the plate frame 2 and prevent the plate frame 2 from shifting during filtration.

[0039] Reference Figure 3 and Figure 4A first positioning hole 31 is provided on the lower end face of the plate frame 2 near the first positioning groove 15. A positioning spring 32 is fixedly connected to the plate frame 2 and is located in the first positioning hole 31. A positioning block 33 with a hemispherical end is fixedly connected to the other end of the positioning spring 32. When the plate frame 2 is not pulled out, the positioning block 33 is located in the first positioning hole 31, and the positioning spring 32 is in a compressed state. The filter body 1 has several second positioning holes 34. The second positioning holes 34 correspond one-to-one with the positioning blocks 33 and are mutually compatible. When the plate frame 2 is pulled out, the positioning spring 32 and the positioning block 33 move outward together with the plate frame 2. When the first positioning hole 31 and the second positioning hole 34 are connected, the positioning spring 32 applies a downward force to the positioning block 33, causing the positioning block 33 to enter the second positioning hole 34. The positioning hole 34 limits the length of the plate frame 2 by positioning block 33. When the worker pulls the plate frame 2 outward, the plate frame 2 is obstructed when the positioning block 33 enters the second positioning hole 34, indicating that the plate frame 2 is about to detach from the first slide rail 22, which reduces the probability of the plate frame 2 falling off the first slide rail 22 and the second slide rail 23. When the plate frame 2 needs to be pushed back, since the end of the positioning block 33 is hemispherical, the worker continuously applies a horizontal force to the plate frame 2, and the second positioning hole 34 continuously applies a horizontal force to the positioning block 33, which can make the positioning block 33 slowly move in the vertical direction, squeezing the positioning spring 32. Finally, the positioning spring 32 is compressed again, the positioning block 33 returns to the first positioning hole 31, the limiting effect of the second positioning hole 34 on the positioning block 33 is released, and the plate frame 2 is pushed back into the filter.

[0040] Reference Figure 5 and Figure 6 The pulling assembly 4 includes a cylinder 41, a pulling rod 42, several pulling parts 5, a first connecting rod 43, and a rotating assembly. The cylinder 41 is fixedly connected to the upper end face of the filter body 1, and the filter body 1 supports the cylinder 41. The cylinder 41 is arranged along the width direction of the filter body 1, and the output shaft of the cylinder 41 is rotatably connected to the first connecting rod 43 through the rotating assembly. The output shaft of the cylinder 41 can drive the rotating assembly and the first connecting rod 43 to move synchronously along the width direction of the filter body 1. The pulling rod 42 is arranged along the length direction of the filter body 1, and the first connecting rod 43 is fixedly connected to the middle of the pulling rod 42. The pulling rod 42 can move synchronously with the first connecting rod 43. The pulling rod 42 has several first limiting slots 421 adapted to the plate frame 2. The pulling parts 5 pass through the first limiting slots 421 and are slidably connected to the pulling rod 42. The pulling parts 5 can slide within the first limiting slots 421.

[0041] Reference Figure 5The rotating assembly includes a U-shaped support frame 44 and a rotating motor 45. The output shaft of the cylinder 41 is fixedly connected to the support frame 44, and the output shaft of the cylinder 41 can drive the support frame 44 to move synchronously. The rotating motor 45 is fixedly connected to the side of the support frame 44. The output shaft of the rotating motor 45 passes through the support frame 44 and is rotatably connected to the support frame 44. The output shaft of the rotating motor 45 is fixedly connected to the first connecting rod 43. When the rotating motor 45 is started, it can drive the first connecting rod 43 to rotate.

[0042] Reference Figure 5 and Figure 6 When the pulling assembly 4 is not in use, the pulling rod 42, several pulling parts 5, and the first connecting rod 43 are all located on the upper surface of the filter body 1. Two brackets 19 adapted to the pulling rod 42 are fixedly connected to the upper surface of the filter body 1. The brackets 19 support the pulling rod 42, so that the pulling rod 42 and the pulling parts 5 will not press on the cylinder 41, thus avoiding damage to the cylinder 41. When the worker needs to pull out multiple plate frames 2 at once, he first opens the operating door and then starts the cylinder 41. The cylinder 41 drives the rotating assembly and the first connecting rod 43 to move towards the operating door. When the support frame 44 moves out of the upper surface of the filter body 1, the rotating motor 45 starts, causing the first connecting rod 43, the pulling rod 42, and the pulling parts 5 to rotate to the side of the plate frame 2 close to the operating door.

[0043] Reference Figure 5 and Figure 6The pulling component 5 includes a bending component 53, two positioning pieces 54, a second connecting rod 51, and a limiting block 52. The pulling component 5 is detachably connected to the plate frame 2. Both ends of the bending component 53 are fixedly connected to the positioning pieces 54. A second positioning groove 55 is provided on the side of the plate frame 2 near the operating door. The worker can forcefully bring the two ends of the bending component 53 closer together, so that the two positioning pieces 54 are closer together until the two positioning pieces 54 can pass through the second positioning groove 55. Two third positioning grooves 56 are provided on the side of the plate frame 2 near the operating door, which are adapted to the positioning pieces 54. The two third positioning grooves 56 are located on both sides of the second positioning groove 55, and both third positioning grooves 56 are connected to the second positioning groove 55. After the two positioning pieces 54 pass through the second positioning groove 55, the worker releases the bending component 53, so that the bending component 53 returns to its original shape, thereby driving the two positioning pieces 54 into the corresponding third positioning grooves 56. Both ends of the second connecting rod 51 are fixedly connected to the bending component 53 and the limiting block 52, respectively, thereby completing the fixation of the pulling component 5 to the plate frame 2. The pulling component 5, the first limiting groove 421, and the plate frame 2 correspond one-to-one. According to actual needs, the worker can fix the plate frame 2 to be pulled out together with the corresponding pulling component 5. After fixing, the cylinder 41 is started. The cylinder 41 drives the pulling rod 42 and the pulling component 5 to move away from the operating door. Multiple plate frames 2 can be pulled out at one time. Therefore, this application can not only replace a single filter plate in a targeted manner, but also not be limited by the number and position of the plate frames 2. According to the actual working conditions, multiple plate frames 2 that need to be replaced can be pulled out at one time without the need for manual operation by the worker, which improves work efficiency and reduces the workload of the worker.

[0044] The implementation principle of a diatomaceous earth filter with easily replaceable filter plates according to an embodiment of this application is as follows: An operating door is rotatably connected to one side of the filter body 1 in the width direction. Several first slide rails 22 adapted to the lower end face of the plate frame 2 are uniformly fixedly connected inside the filter body 1 along the length direction. Several second slide rails 23 adapted to the upper end face of the plate frame 2 are uniformly fixedly connected to the inner wall of the upper end face of the filter body 1 along the length direction. The plate frame 2, the first slide rail 22, and the second slide rail 23 correspond one-to-one. The plate frame 2 is detachably connected to the filter plate 21. The worker opens the operating door and pulls the plate frame 2 outward along the direction of the first slide rail 22 and the second slide rail 23 to replace the new filter plate 21.

[0045] 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 diatomite filter with easy-to-replace filter plates, comprising a filter body (1), a plurality of plate frames (2), a pulling assembly (4) for pulling the plurality of plate frames (2), characterized in that: The filter machine body (1) is provided with an inlet (11) on one side upper portion in the length direction, and an outlet (12) on the other side lower portion, a plurality of first sliding rails (22) are uniformly and fixedly connected to the inner wall of the lower end surface of the filter machine body (1), a plurality of second sliding rails (23) are uniformly and fixedly connected to the inner wall of the upper end surface of the filter machine body (1), the first sliding rails (22) and the second sliding rails (23) are distributed along the width direction of the filter machine body (1) and are matched with the plate frame (2), and the plate frame (2), the first sliding rail (22) and the second sliding rail (23) are one-to-one corresponding; one side of the filter machine body (1) in the width direction is rotationally connected with an operating door, and a plurality of first positioning grooves (15) are uniformly arranged in the wall thickness of the other side, the first positioning grooves (15) are distributed along the length direction of the filter machine body (1), the first positioning grooves (15) are one-to-one corresponding and matched with the plate frame (2), and the plate frame (2) is detachably connected with a filter plate (21).

2. A diatomaceous earth filter with easy-to-change filter plates according to claim 1, characterized in that: The operating door comprises a first door leaf (13) and a second door leaf (14), the outer sides of the first door leaf (13) and the second door leaf (14) are fixedly connected with handles (16), the filter machine body (1) is fixedly connected with a first sealing strip (17) matched with the operating door, and the long edge of the first door leaf (13) close to the second door leaf (14) is fixedly connected with a second sealing strip (18).

3. The diatomaceous earth filter with easy-to-change filter plates according to claim 1, characterized in that: The plate frame (2) is provided with a pulling groove (24) on one side close to the operating door.

4. The diatomaceous earth filter with easily replaceable filter plates according to claim 1, characterized in that: The plate frame (2) is provided with a first positioning hole (31) on one side close to the first positioning groove (15) of the lower end surface, the plate frame (2) is fixedly connected with a positioning spring (32), the positioning spring (32) is located in the first positioning hole (31), one end of the positioning spring (32) is fixedly connected with a positioning block (33) with a hemispherical end, and the filter machine body (1) is provided with a plurality of second positioning holes (34), the second positioning holes (34) are one-to-one corresponding and matched with the positioning block (33).

5. The diatomaceous earth filter with easy-to-change filter plates according to claim 1, characterized in that: The pulling assembly (4) comprises a cylinder (41), a pulling rod (42), a plurality of pulling pieces (5), a first connecting rod (43) and a rotating assembly, the cylinder (41) is fixedly connected to the upper end surface of the filter machine body (1), the cylinder (41) is arranged along the width direction of the filter machine body (1), the output shaft of the cylinder (41) is rotationally connected with the first connecting rod (43) through the rotating assembly, the pulling rod (42) is arranged along the length direction of the filter machine body (1), the first connecting rod (43) is fixedly connected with the middle portion of the pulling rod (42), the pulling rod (42) is provided with a plurality of first limiting through grooves (421), the pulling pieces (5) pass through the first limiting through grooves (421) and are slidably connected with the pulling rod (42), the pulling pieces (5), the first limiting through grooves (421) and the plate frame (2) are one-to-one corresponding, and the pulling pieces (5) are detachably connected with the plate frame (2).

6. A diatomaceous earth filter with easy-to-change filter plates according to claim 5, characterized in that: The pulling member (5) comprises a bending piece (53), two positioning sheets (54), a second connecting rod (51), and a limiting block (52), both ends of the second connecting rod (51) are fixedly connected with the bending piece (53) and the limiting block (52) respectively, both ends of the bending piece (53) are fixedly connected with the positioning sheets (54) respectively, the plate frame (2) is provided with a second positioning groove (55) and two third positioning grooves (56) which are matched with the positioning sheets (54) on the side close to the operation door, the two third positioning grooves (56) are respectively located on the two sides of the second positioning groove (55), and the third positioning grooves (56) are all in communication with the second positioning groove (55).

7. A diatomaceous earth filter with easy-to-change filter plates according to claim 5, characterized in that: The rotating assembly comprises a U-shaped support frame (44) and a rotating motor (45), the output shaft of the air cylinder (41) is fixedly connected with the support frame (44), the rotating motor (45) is fixedly connected on the side surface of the support frame (44), the output shaft of the rotating motor (45) penetrates through the support frame (44) and is rotationally connected with the support frame (44), and the output shaft of the rotating motor (45) is fixedly connected with the first connecting rod (43).

8. A diatomaceous earth filter with easy-to-change filter plates according to claim 1, characterized in that: The filter body (1) is fixedly connected with two brackets (19) matched with the pulling rod (42) on the upper end face.

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