Filter backwash switching device and filter cloth real-time self-cleaning system of pressure filter

Abstract

This invention relates to the field of filter cleaning equipment technology, and proposes a filter backwash switching device, including an inner tube, an outer tube, a filter fan body, and a switching disc. The inner tube is rotatably disposed inside the filter cartridge, with both ends extending to the outside of the filter cartridge. The outer tube is disposed around the inner tube, forming a backwash chamber between the inner and outer tubes. The filter fan body is disposed around the outer tube. The switching disc is located between the outer tube and the filter fan body, and has a switching channel inside. After the switching disc rotates, the filter fan body, the switching channel, and the inner tube located in the slurry are used to discharge the filtrate inside the filter fan body. The filter fan body, the switching channel, and the backwash chamber located above the slurry are used to rinse the filter fan body. This technical solution solves the problem in related technologies where pressure filters require stopping filtration operations before cleaning, each cleaning session takes more than 30 minutes, cleaning is difficult, and the filter cloth pores become increasingly clogged between cleaning sessions.

Description

Technical Field

[0001] This invention relates to the field of filter cleaning equipment technology, specifically to a filter backwash switching device and a real-time self-cleaning system for filter cloth in a pressure filter. Background Technology

[0002] Pressure filters are suitable for dewatering flotation clean coal and raw fine coal slime, as well as for dewatering ferrous and non-ferrous metal concentrates and solid-liquid separation in chemical, light industry, and environmental protection industries. During the filtration process, some fine particles adhere to the surface of the filter cloth or into the filter pores. These particles do not completely detach during filter cake backflushing, clogging the pores and reducing filtration efficiency in the next cycle. Therefore, the filter cloth must be cleaned regularly with water to ensure good air permeability and improve filtration efficiency. However, existing pressure filters still have the following drawbacks in practical use: ① The filtration operation must be stopped before cleaning can be carried out, and each cleaning time is more than 30 minutes. This reduces the equipment's filtration working time, reduces the throughput, and increases the number of times related supporting equipment is started and stopped. ② Because a periodic cleaning method is used, the slag adsorbed on the filter cloth for too long makes it difficult to clean the filter cloth, and the filter cloth pores become more and more clogged during the two cleaning intervals. Summary of the Invention

[0003] This invention proposes a filter backwash switching device and a real-time self-cleaning system for filter cloth in a pressure filter, which solves the problem in related technologies that the pressure filter needs to stop filtration before it can be cleaned, each cleaning time is more than 30 minutes, cleaning is difficult, and the filter cloth pores become more and more clogged during the two cleaning periods.

[0004] The technical solution of the present invention is as follows: a filter backwash switching device, installed on the filter cartridge of a pressure filter, the key feature being: comprising, An inner tube is rotatably disposed inside the filter cartridge, with both ends of the inner tube extending to the outside of the filter cartridge; An outer tube is disposed around the inner tube, and a backflow cavity is formed between the inner tube and the outer tube; The filter fan body is disposed around the outer tube; A switching disc is located between the outer tube and the filter fan body. The switching disc has a switching channel inside. After the switching disc rotates, the filter fan body, the switching channel, and the inner tube located in the slurry are connected to discharge the filtrate in the filter fan body. The filter fan body, the switching channel, and the backwash chamber located above the slurry are connected to rinse the filter fan body.

[0005] It also includes, The mounting components are arranged around the outer tube. All the mounting components in the same mounting component group are arranged along the circumference of the outer tube. The filter fan body is located around the mounting components. The mounting components are arranged one-to-one with the filter fan body. The end of the mounting component facing the filter fan body is provided with a filtrate inlet and a backflushing outlet. Both the filtrate inlet and the backflushing outlet are connected to the interior of the filter fan body. A filter tube is disposed at the end of the mounting component away from the filter fan body, and is used to communicate with the interior of the inner tube; A backflush pipe is disposed at the end of the mounting component away from the filter fan body and is used to communicate with the backflush chamber. The switching disc is rotatably mounted on the mounting component. After the switching disc rotates, the outer end of the filter tube, the switching channel and the filtrate inlet are connected to discharge the filtrate, and the outer end of the backwash tube, the switching channel and the backwash outlet are connected to flush the filter fan body.

[0006] It also includes, Mounting ring, the mounting ring being located around the outer tube; A support bar, one end of which is disposed on the mounting ring and the other end of which is disposed on the filter cartridge; An arc-shaped rack is disposed on the outer circumferential surface of the mounting ring. There are two arc-shaped racks, and the length of one arc-shaped rack is greater than the length of the other arc-shaped rack. A transmission gear is mounted on the switching disk. When the mounting component rotates, it drives the transmission gear to mesh or disengage with the arc-shaped rack. The meshing of the transmission gear with the arc-shaped rack drives the switching disk to rotate.

[0007] A backwash channel and a filtration channel are provided on the end face of the filter fan body facing the mounting component. The backwash channel is connected to the backwash outlet, and the filtration channel is connected to the filtrate inlet.

[0008] The support bars are provided on both sides of the mounting ring.

[0009] A real-time self-cleaning system for filter cloth in a pressure filter includes the aforementioned filter backwash switching device.

[0010] It also includes, A pressure plate is located inside the filter cylinder. The pressure plate is provided on both sides of the filter fan body. The filter fan body has filter holes and a filter cloth is provided on the surface of the filter fan body. The filter cloth is located outside the filter holes and is used to filter the slurry in the filter cylinder. It also includes a first transmission rod and a second transmission rod. The two pressure plates located on both sides of the filter fan body are respectively connected to the first transmission rod and the second transmission rod. The first transmission rod and the second transmission rod are slidably disposed on the filter cylinder. The first transmission rod is used to move the pressure plate located on one side of the filter fan body closer to or away from the filter fan body, and the second transmission rod is used to move the pressure plate located on the other side of the filter fan body closer to or away from the filter fan body.

[0011] It also includes a slurry injection pipe, which is located outside the filter cartridge.

[0012] It also includes, A scraper is disposed on the inner wall of the filter cylinder, the scraper abuts against the surface of the filter fan body, and the scraper has collection holes. A material guide is disposed inside the filter cylinder. The material guide has a hollow structure, and the hollow structure of the material guide connects the collection hole with the outside of the filter cylinder, for discharging the filter residue from the filter cylinder.

[0013] It also includes, A base, which is disposed on the filter cartridge, has a limiting protrusion; A sliding member, which is slidably disposed on the base; A lever, which is slidably disposed on the slider, and after the slider slides, the slider or the lever abuts against the limiting protrusion; A vibrating element is disposed on the pusher block or the sliding element, and the working end of the vibrating element is located inside the filter cylinder. After the vibrating element moves, it abuts against or cancels abutment against the filter fan body. An elastic element, one end of which is disposed on the sliding element and the other end of which is disposed on the lever, is used to provide a force that moves the sliding element and the lever away from each other.

[0014] The working principle and beneficial effects of this invention are as follows: An inner tube is rotatably installed inside the filter cylinder, with both ends extending to the outside of the filter cylinder; an outer tube is installed around the inner tube, forming a backwash chamber between the inner and outer tubes; a filter fan body is installed around the outer tube, the filter fan body has filter holes, and a filter cloth is installed on the surface of the filter fan body, located outside the filter holes, for filtering the slurry inside the filter cylinder; a switching disc is located between the outer tube and the filter fan body, and has a switching channel inside the switching disc. After the switching disc rotates, the filter fan body, the switching channel, and the inner tube located within the slurry are connected to discharge the filtrate from the filter fan body, while the filter fan body, the switching channel, and the backwash chamber located above the slurry are connected to rinse the filter fan body. A rotary drive device drives the inner tube to rotate, which in turn drives the outer tube, the filter fan body, and the switching disc to rotate synchronously. After the switching disc rotates, the filter fan body, the switching channel, and the inner tube located within the slurry are connected. Under pressure, the slurry enters the filter fan body through the filter holes on the surface of the filter fan body located within the slurry, and is then discharged through the inner tube. The filter fan body, located above the slurry, connects to the switching channel and the backwash chamber. External gas enters the filter fan body through the backwash chamber and is then ejected from the filter holes on the surface of the filter fan body, washing the filter cloth on the surface of the filter fan body above the slurry. This allows the pressure filter to perform real-time self-cleaning of the filter cloth while applying pressure filtration, reducing the risk of clogging and the number of start-ups and shutdowns, and improving the filtration efficiency and quality of the pressure filter. Attached Figure Description

[0015] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0016] Figure 1 This is a schematic diagram of the external structure of the present invention in one direction.

[0017] Figure 2 This is a schematic diagram of the external structure of the present invention from another direction.

[0018] Figure 3 This is a schematic diagram of the internal structure of the present invention in one direction.

[0019] Figure 4 This is a schematic diagram of the internal structure of the present invention from another direction.

[0020] Figure 5 This is a schematic diagram of the connection structure between the switching disk, the inner tube, and the backflush cavity in this invention.

[0021] Figure 6 This is a schematic diagram of the connection structure between the filter fan body and the mounting component in one direction in this invention.

[0022] Figure 7 for Figure 6 A magnified view of A in the middle.

[0023] Figure 8 This is a schematic diagram of the connection structure between the filter fan body and the mounting component in another direction in this invention.

[0024] Figure 9 for Figure 8 A magnified view of B in the middle.

[0025] Figure 10 This is a schematic diagram of the connection structure between the arc-shaped rack and the transmission gear in this invention.

[0026] Figure 11 This is a schematic diagram of the connection structure between the arc-shaped rack and the mounting ring in this invention.

[0027] Figure 12 This is a schematic diagram of the connection structure between the filter fan body and the outer tube in one direction in this invention.

[0028] Figure 13 for Figure 12 A magnified view of C.

[0029] Figure 14 This is a schematic diagram of the connection structure between the filter fan body and the outer tube in another direction in this invention.

[0030] Figure 15 for Figure 14 A magnified view of D.

[0031] Figure 16 This is a schematic diagram of the connection structure between the material guide and the filter fan body in this invention.

[0032] Figure 17 for Figure 16 A magnified view of E in the middle.

[0033] Figure 18 This is a schematic diagram of the filter fan body in this invention.

[0034] Figure 19 This is a schematic diagram of the connection structure between the filter fan body and the retaining ring in this invention.

[0035] Figure 20 This is a schematic diagram of the connection structure between the straight rack and the base in this invention.

[0036] Figure 21 This is a schematic diagram of the internal structure of the filter cartridge in this invention.

[0037] Figure 22 for Figure 21 A magnified view of F in the image.

[0038] Figure 23 This is a schematic diagram of the connection structure between the vibrating component and the elastic expansion component in this invention.

[0039] Figure 24 This is a schematic diagram of the elastic element in this invention.

[0040] In the diagram: 1. Filter cartridge; 2. Inner tube; 3. Outer tube; 4. Filter fan body; 5. Switching disc; 6. Backwash chamber; 7. Mounting ring; 8. Support bar; 9. Mounting component; 10. Filter tube; 11. Backwash tube; 12. Filtrate inlet; 13. Backwash outlet; 14. Switching channel; 15. Arc-shaped rack; 16. Transmission gear; 17. Backwash channel; 18. Filter channel; 19. Pressure plate; 20. First transmission rod; 21. Second transmission rod; 22. Slurry injection pipe; 22-1. First connecting pipe; 22-2. Adapter pipe; 22-3. Second connecting pipe; 23. Filter hole; 24. Scraper; 25. Material guide; 26. Collection hole; 27. Base; 28. 29. Sliding component, 30. Toggle block, 30. Vibrating component, 30-1. Connecting rod, 30-2. Elastic telescopic component, 30-3. Vibrating component, 30-3-1. Support rod, 30-3-2. Cleaning protrusion, 31. Elastic component, 31-1. Mounting sleeve, 31-2. Moving rod, 31-3. Spring, 32. Limiting protrusion, 33. Limiting ring, 34. Snap ring, 35. First baffle, 36. Second baffle, 37. Mounting box, 38. Pull-out frame, 39. Drive gear, 40. Linear rack, 41. Slide rail, 42. Limiting rod, 43. Motor, 44. Slot, 45. Limiting protrusion, 46. Backwashing equipment, 47. Pipeline, 48. Rotary sealing plug. Detailed Implementation

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0042] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0043] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0045] Example, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In one embodiment of the present invention, a filter backwash switching device is proposed, which is installed on the filter cartridge 1 of a pressure filter. It includes an inner tube 2, an outer tube 3, a filter fan body 4, and a switching disc 5. The inner tube 2 is rotatably installed inside the filter cartridge 1, and both ends of the inner tube 2 extend to the outside of the filter cartridge 1. The outer tube 3 is installed around the inner tube 2, and a backwash chamber 6 is formed between the inner tube 2 and the outer tube 3. The filter fan body 4 is installed around the outer tube 3. The switching disc 5 is located between the outer tube 3 and the filter fan body 4. The switching disc 5 has a switching channel 14 inside. After the switching disc 5 rotates, the filter fan body 4, the switching channel 14, and the inner tube 2 located in the slurry are connected to discharge the filtrate in the filter fan body 4. The filter fan body 4, the switching channel 14, and the backwash chamber 6 located above the slurry are connected to rinse the filter fan body 4.

[0046] The inner tube 2 is coaxially arranged with the filter cartridge 1. A rotary drive device rotates the inner tube 2, which in turn drives the outer tube 3, filter fan body 4, and switching disc 5 to rotate synchronously. After the switching disc 5 rotates, the filter fan body 4, the switching channel 14 located within the slurry, and the inner tube 2 are connected. Under pressure, the slurry enters the filter fan body 4 through the filter holes 23 on its surface and is then discharged through the inner tube 2. The filter fan body 4, located above the slurry, and the switching channel 14 are connected to the backwash chamber 6. External gas enters the filter fan body 4 through the backwash chamber 6 and is then ejected from the filter holes 23 on its surface, washing the filter cloth on the surface of the filter fan body 4 above the slurry. This allows the pressure filter to perform real-time self-cleaning of the filter cloth while simultaneously applying pressure, reducing the risk of clogging and the number of start-ups and shutdowns, and improving the filtration efficiency and quality of the pressure filter.

[0047] Furthermore, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 12 , Figure 13 , Figure 14 and Figure 15 As shown, it also includes mounting components 9, filter tubes 10, and backwash tubes 11. A mounting component group is set around the outer tube 3. All mounting components 9 in the same mounting component group are arranged along the circumference of the outer tube 3. The filter fan body 4 is located around the mounting components 9. The mounting components 9 and the filter fan body 4 are set one-to-one. The end of the mounting component 9 facing the filter fan body 4 is provided with a filtrate inlet 12 and a backwash outlet 13. Both the filtrate inlet 12 and the backwash outlet 13 are connected to the inside of the filter fan body 4. The filter tube 10 is set at the end of the mounting component 9 away from the filter fan body 4 and is used to connect with the inside of the inner tube 2. The backwash tube 11 is set at the end of the mounting component 9 away from the filter fan body 4 and is used to connect with the backwash chamber 6. The switching disk 5 is rotatably set on the mounting component 9. After the switching disk 5 rotates, the outer end of the filter tube 10 and the switching channel 14 are connected to the filtrate inlet 12 to discharge filtrate. The outer end of the backwash tube 11 and the switching channel 14 are connected to the backwash outlet 13 to rinse the filter fan body 4.

[0048] When the filter fan body 4 rotates to the lower semicircle of the filter cylinder 1, the switching channel 14 on the switching disc 5 connects the filter fan body 4, the filtrate inlet 12, the switching channel 14, the filter tube 10, and the inner tube 2. Therefore, when the filter fan body 4 contacts the slurry, under pressure, a pressurized filtration process can be achieved, discharging the filtrate through the inner tube 2. Figure 5 The state shown. When the filter fan body 4 rotates to the upper semicircle of the filter cylinder 1 and separates from the slurry, the switching disk 5 rotates so that the backwash chamber 6, backwash pipe 11, switching flow channel 14 and backwash outlet 13 are connected. At this time, the filter cake on the filter cloth on the outside of the filter fan body 4 can be removed from the surface of the filter cloth by the backwash air pressure provided by the backwash chamber 6.

[0049] Furthermore, such as Figure 7 , Figure 10 , Figure 11 and Figure 13 As shown, it also includes a mounting ring 7, a support bar 8, an arc-shaped rack 15, and a transmission gear 16. The mounting ring 7 is located around the outer tube 3. One end of the support bar 8 is mounted on the mounting ring 7, and the other end is mounted on the filter cartridge 1. The arc-shaped rack 15 is mounted on the outer circumference of the mounting ring 7. There are two arc-shaped racks 15, and the length of one arc-shaped rack 15 is greater than the length of the other arc-shaped rack 15. The transmission gear 16 is mounted on the switching disk 5. After the mounting part 9 rotates, it drives the transmission gear 16 to mesh or disengage with the arc-shaped rack 15. The meshing of the transmission gear 16 with the arc-shaped rack 15 drives the switching disk 5 to rotate. Figure 11As shown, the line connecting the lowest point of the shorter arc-shaped rack 15 on the right and the highest point of the longer arc-shaped rack 15 on the left passes through the axis of the mounting ring 7. Half the circumference of the transmission gear 16 is equal to the sum of the lengths of the two arc-shaped racks 15. The shorter arc-shaped rack 15 is above the horizontal center line of the mounting ring 7; the longer arc-shaped rack 15 is below the horizontal center line of the mounting ring 7. When the shorter arc-shaped rack 15 meshes with the transmission gear 16, it can switch the working state from pressure filtration to backflushing; when the longer arc-shaped rack 15 meshes with the transmission gear 16, it can switch the working state from backflushing back to pressure filtration.

[0050] like Figure 10 As shown, the filter fan body 4 rotates counterclockwise in one direction. The mounting ring 7 is mounted on the filter cartridge 1 and remains stationary, so the positions of the two arc-shaped racks 15 also remain stationary. When the filter fan body 4 rotates counterclockwise to the upper semicircle of the filter cartridge 1, the transmission gear 16 fixed on the switching disk 5 meshes with the shorter arc-shaped rack 15 on the right side, thereby enabling the switching disk 5 to rotate. This, in turn, connects the switching channel 14 with the filter tube 10 and the filtrate inlet 12. This state is as follows: Figure 5 As shown, the connection is switched to be connected to the backwash pipe 11 and backwash outlet 13, that is, the filter fan body 4 is connected to the backwash chamber 6. Similarly, the length of the arc-shaped rack 15 on the left is longer than that on the right. When the mounting ring 7 continues to rotate counterclockwise, and several transmission gears 16 mesh with the arc-shaped rack 15 on the left in sequence, when the filter fan body 4 enters the slurry, several switching channels 14 switch from being connected to the backwash pipe 11 and backwash outlet 13 to being connected to the filter pipe 10 and filtrate inlet 12. This state is as follows. Figure 5 As shown, the filter fan body 4 is connected to the inner tube 2, thereby realizing the pressurized filtration process of the slurry.

[0051] Furthermore, such as Figure 5 As shown, a backwash channel 17 and a filtration channel 18 are provided on the end face of the filter fan body 4 facing the mounting component 9. The backwash channel 17 is connected to the backwash outlet 13, and the filtration channel 18 is connected to the filtrate inlet 12. During installation, it is only necessary to connect the backwash channel 17 to the backwash outlet 13 and the filtration channel 18 to the filtrate inlet 12. By rotating the switching disk 5, the switching channel 14 on the switching disk 5 can be connected to either the filtrate inlet 12 or the backwash outlet 13. The structure is simple and easy to use.

[0052] Furthermore, such as Figure 12 As shown, support bars 8 are provided on both sides of the mounting ring 7. At least two support bars 8 are provided on both sides of the mounting ring 7. All support bars 8 located on the same side of the mounting ring 7 are evenly arranged along the circumference of the mounting ring 7. The mounting ring 7 and the filter cartridge 1 are connected together by multiple support bars 8, making the connection between the mounting ring 7 and the filter cartridge 1 more secure and reliable.

[0053] A real-time self-cleaning system for filter cloth in a pressure filter includes a filter backwash switching device.

[0054] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 As shown, it also includes a pressure plate 19, which is located inside the filter cylinder 1. Pressure plates 19 are provided on both sides of the filter fan body 4. The filter fan body 4 has filter holes 23 and a filter cloth on its surface. The filter cloth is located outside the filter holes 23 and is used to filter the slurry in the filter cylinder 1. It also includes a first transmission rod 20 and a second transmission rod 21. The two pressure plates 19 located on both sides of the filter fan body 4 are respectively connected to the first transmission rod 20 and the second transmission rod 21. The first transmission rod 20 and the second transmission rod 21 are slidably arranged on the filter cylinder 1. The first transmission rod 20 is used to move the pressure plate 19 located on one side of the filter fan body 4 closer to or away from the filter fan body 4, and the second transmission rod 21 is used to move the pressure plate 19 located on the other side of the filter fan body 4 closer to or away from the filter fan body 4. The first transmission rod 20 and the second transmission rod 21 move in opposite directions, allowing the two pressure plates 19 located on both sides of each filter fan body 4 to simultaneously move closer to or further away from the filter fan body 4. When the pressure plates 19 move closer to the filter fan body 4, they increase the pressure on the filter cloth on the filter fan body 4, improving filtration efficiency and effectively overcoming the problem of filter pore blockage. The filter fan body 4 has a hollow structure, with several filter holes 23 on both side walls. The diameter of the filter holes 23 increases from the outside to the inside. During the filtration process, this improves the interception effect of the filter cake to ensure the filtration quality of the filtrate. During the backwashing process, it increases the impact effect of the water, achieving reverse self-cleaning of the filter cloth.

[0055] Furthermore, such as Figure 2 and Figure 4 As shown, it also includes a slurry injection pipe 22, which is located outside the filter cartridge 1. By connecting the slurry injection pipe 22 to external grouting equipment, slurry can be injected into the filter cartridge 1 at any time, which is more convenient, faster, and saves time and effort.

[0056] Furthermore, such as Figure 2 and Figure 4As shown, the slurry injection pipe 22 includes a first connecting pipe 22-1, a transfer pipe 22-2, and a second connecting pipe 22-3. The inlet end of the first connecting pipe 22-1 is used to connect to an external slurry delivery device, and the outlet end of the first connecting pipe 22-1 is connected to the transfer pipe 22-2. The length direction of the transfer pipe 22-2 is the same as the length direction of the filter cartridge 1. All the second connecting pipes 22-3 are arranged along the length direction of the transfer pipe 22-2 and are located between the transfer pipe 22-2 and the filter cartridge 1. The slurry enters the transfer pipe 22-2 through the first connecting pipe 22-1, and then enters the filter cartridge 1 through multiple second connecting pipes 22-3, giving the filter cartridge 1 multiple inlets and increasing the slurry inlet speed.

[0057] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 16 and Figure 17 As shown, it also includes a scraper 24 and a guide 25. The scraper 24 is disposed on the inner wall of the filter cylinder 1 and abuts against the surface of the filter fan body 4. The scraper 24 has a collection hole 26. The guide 25 is disposed inside the filter cylinder 1 and has a hollow structure. The hollow structure of the guide 25 connects the collection hole 26 with the outside of the filter cylinder 1 and is used to discharge the filter residue from the filter cylinder 1.

[0058] In this embodiment, the filter residue is the slag in the prior art, and the filter cloth in the prior art is placed on the surface of the filter fan body 4, which has filter holes 23. To avoid the filter residue adsorbing onto the filter fan body 4 and clogging the filter holes 23, causing cleaning difficulties, a scraper 24 is added inside the filter cylinder 1. The scraper 24 is a long rod, with one side abutting against the filter cloth on the surface of the filter fan body 4. After the filter fan body 4 rotates, it moves relative to the scraper 24, thereby cleaning the surface of the filter cloth in real time. Specifically, during operation, the filter cylinder 1 is filled with slurry, and the scraper 24 is located above the liquid surface. As the filter fan body 4 rotates inside the filter cylinder 1, the scraper 24 scrapes against the surface of the filter fan body 4, scraping off the filter residue adhering to the surface of the filter fan body 4 and letting it fall into the collection hole 26. The guide component 25 can be a square or round tube, with a hollow internal structure. The filter cylinder 1 has a through hole for the guide component 25 to extend from. One end of the guide component 25 communicates with the collection hole 26, and the other end protrudes from the through hole on the surface of the filter cylinder 1. The hollow structure of the guide component 25 isolates the slurry from the collected filter residue. The filter residue in the collection hole 26 can be transported to the outside of the filter cylinder 1 via the hollow structure of the guide component 25. Without stopping the machine, the surface of the filter fan body 4 can be cleaned while the equipment is running, achieving real-time self-cleaning of the filter cloth on the surface of the filter fan body 4. During cleaning, the amount of filter residue adhering to the filter cloth surface can be greatly reduced, effectively alleviating the clogging of the filter holes 23 and thus reducing the difficulty of cleaning.

[0059] Furthermore, such as Figure 1 , Figure 2 and Figure 20 As shown, it also includes a base 27, a sliding member 28, a lever 29, a vibrator 30, and an elastic member 31. The base 27 is mounted on the filter cylinder 1 and has a limiting protrusion 32. The sliding member 28 is slidably mounted on the base 27. The lever 29 is slidably mounted on the sliding member 28. After the sliding member 28 slides, the sliding member 28 or the lever 29 abuts against the limiting protrusion 32. The vibrator 30 is mounted on the lever 29 or the sliding member 28. The working end of the vibrator 30 is located inside the filter cylinder 1. After the vibrator 30 moves, it abuts against or cancels the abutment against the filter fan body 4. One end of the elastic member 31 is mounted on the sliding member 28 and the other end is mounted on the lever 29. It is used to provide a force that moves the sliding member 28 and the lever 29 away from each other.

[0060] In this embodiment, the base 27 is designed with a specific limiting protrusion 32 structure to limit the range of motion of the slider 28 and trigger vibration. The slider 28 is designed to slide smoothly on the base 27. The lever 29 is slidably mounted on the slider 28 and moves with the slider 28. When the slider 28 slides to its limit position on the base 27, the slider 28 or the lever 29 will contact the limiting protrusion 32 on the base 27, triggering the vibration action. The vibrator 30 is directly mounted on the lever 29 or the slider 28. As the lever 29 moves, the vibrator 30 will apply vibration to the filter fan body 4, which helps to accelerate the unloading speed of the filter cloth on the filter fan body 4 and improve the filtration efficiency. One end of the elastic member 31 is fixed to the slider 28, and the other end is connected to the lever 29. Its function is to provide elastic force to the lever 29 to keep it away from the slider 28 in its natural state. When the agitator 29 is subjected to force and contacts the limiting protrusion 32 and is compressed, the elastic element 31 stores energy; when the contact is released, the elastic element 31 releases energy, pushing the agitator 29 and the vibrating element 30 to quickly return to their original positions and generate vibration, further promoting the unloading effect of the filter fan body 4. In summary, through reasonable structural design and coordinated action, efficient vibration assistance for the filter fan body 4 is achieved, effectively improving the filtration quality and working efficiency of the pressure filter.

[0061] Furthermore, such as Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 13 , Figure 14 and Figure 15 As shown, it also includes a limiting ring 33, and all the mounting parts 9 are located between the two limiting rings 33. The two limiting rings 33 clamp and fix all the mounting parts 9 together, making the connection more secure and reliable.

[0062] Furthermore, such as Figure 3 , Figure 4 , Figure 6 , Figure 8 , Figure 12 , Figure 14 , Figure 16 and Figure 19 As shown, it also includes a retaining ring 34, which is located around the filter fan body 4. The outer ends of all the filter fan bodies 4 are engaged with the retaining ring 34. By using the retaining ring 34 to fasten the outer ends of all the filter fan bodies 4 together, it can play a positioning and connection role, making the overall stability better and facilitating the disassembly and assembly of the filter fan bodies 4.

[0063] like Figure 18 and Figure 19 As shown, a slot 44 is provided on the outer end face of the filter fan body 4. The slots 44 on two adjacent filter fan bodies 4 are spliced ​​together to form a connected circular limiting groove. A limiting protrusion 45 is provided on the inner side of the retaining ring 34. The limiting protrusion 45 is engaged with the circular limiting groove to prevent the retaining ring 34 and the filter fan body 4 from shifting along the axial direction.

[0064] Furthermore, such as Figure 16 and Figure 17 As shown, the collection hole 26 is opened along the length direction of the scraper 24, with the inlet and outlet ends of the collection hole 26, respectively. The width of the collection hole 26 gradually decreases from the inlet end to the outlet end. In this embodiment, the collection hole 26 is opened along the length direction of the scraper 24, thus parallel to the surface of the filter fan body 4, which facilitates the collection of filter cake. In addition, the top and bottom of the collection hole 26 are the inlet and outlet ends, respectively. The width of the collection hole 26 gradually decreases from the inlet end to the outlet end. The wider inlet end facilitates the entry of filter cake and plays a guiding role, while the narrower outlet end helps to gather the filter cake and facilitates its entry into the guide member 25.

[0065] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 16 and Figure 17 As shown, the guide component 25 is a guide frame with a rectangular cross-section. One end of the guide frame is connected to the outlet end, and the other end is connected to the outside of the filter cartridge 1. In this embodiment, the guide component 25 is preferably a guide frame, which is rectangular in shape and hollow inside. The rectangular shape can better match the strip shape of the collection hole 26.

[0066] Furthermore, such as Figure 16 and Figure 17 As shown, it also includes a first baffle 35, which is disposed on the scraper 24 and located on the side of the scraper 24 away from the surface of the filter fan body 4. In this embodiment, the first baffle 35 is disposed on the side of the scraper 24 away from the surface of the filter fan body 4 and is vertically arranged, which plays a blocking role on the filter residue scraped off by the scraper 24, preventing the filter residue from falling off the scraper 24 and falling into the slurry instead of falling into the collection hole 26.

[0067] Furthermore, such as Figure 16 and Figure 17 As shown, the distance between the first baffle 35 and the surface of the filter fan body 4 is L, which gradually decreases along the direction away from the scraper 24 and closer to the scraper 24. In this embodiment, the distance L is designed to gradually decrease from top to bottom, so that the side of the first baffle 35 near the filter fan body 4 becomes an inclined surface, making the space between the first baffle 35 and the filter fan body 4 wider at the top and narrower at the bottom, thereby gathering the filter residue and helping it enter the collection hole 26.

[0068] Furthermore, such as Figure 16 and Figure 17 As shown, it also includes a second baffle 36, which is disposed on the scraper 24 and located at the end of the scraper 24 away from the center of the filter fan body 4. In this embodiment, the second baffle 36 is disposed on the scraper 24, abuts against the surface of the filter fan body 4, and the top of the second baffle 36 is inclined towards the center of the filter fan body 4. The second baffle 36 is located above the collection hole 26. When the filter fan body 4 rotates, the second baffle 36 acts as a barrier to prevent the filter residue from falling off the scraper 24 and helps to guide the filter residue into the collection hole 26.

[0069] Furthermore, such as Figure 16 and Figure 17 As shown, the second baffle 36 abuts against the inner wall of the filter cylinder 1. During operation, the filter fan body 4 rotates, causing the second baffle 36 to scrape against the inner wall of the filter cylinder 1, thereby scraping off the filter residue attached to the inner wall of the filter cylinder 1. Furthermore, the second baffle 36 is designed to be located above the collection hole 26, so that the scraped filter residue can fall directly into the collection hole 26, thereby cleaning the inner wall of the filter cylinder 1 and improving the working efficiency of the filter cylinder 1.

[0070] Furthermore, such as Figure 16 and Figure 17 As shown, scrapers 24 are provided on both sides of the filter fan body 4. In this embodiment, two sets of scrapers 24 with the same structure are provided on both sides of the filter fan body 4 to achieve simultaneous cleaning of both sides of the filter fan body 4.

[0071] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 16 and Figure 17As shown, the system also includes a mounting box 37, with the guide component 25 connected at both ends to the collection hole 26 and the mounting box 37, respectively. It also includes a pull-out frame 38, which is slidably disposed within the mounting box 37. After sliding, the pull-out frame 38 slides into or out of the mounting box 37. In this embodiment, a mounting box 37 and a pull-out frame 38 are provided. The pull-out frame 38 is located within the mounting box 37, and the guide component 25 is connected at both ends to the collection hole 26 and the mounting box 37, respectively. Filter residue discharged from the filter cartridge 1 can enter the pull-out frame 38 within the mounting box 37 via the guide component 25. The pull-out frame 38 is used to temporarily store the filter residue, and the mounting box 37 is used to ensure the space is sealed. When it is necessary to clean the filter residue, the pull-out frame 38 is pulled out to remove the stored filter residue, and then the pull-out frame 38 is pushed back into its original position. The operation is very convenient and quick.

[0072] Furthermore, such as Figure 20 As shown, it also includes a drive gear 39 and a linear rack 40. The drive gear 39 is rotatably mounted on the base 27; the linear rack 40 is mounted on the slider 28 and meshes with the drive gear 39. The drive gear 39 drives the linear rack 40 to slide back and forth. After the linear rack 40 slides and abuts against the limiting protrusion 32, the drive gear 39 drives the lever 29 to slide. In addition to the original limiting protrusion 32, the base 27 also has a drive gear 39 rotatably mounted. A linear rack 40 that meshes with the drive gear 39 is mounted on the slider 28. When the drive gear 39 rotates, through meshing transmission, it can drive the linear rack 40 to perform reciprocating linear motion along the slider 28, so as to achieve more precise and effective drive control.

[0073] In actual operation, when the drive gear 39 rotates and drives the linear rack 40 to slide, the movement of the linear rack 40 will drive the sliding member 28 to move. The paddle block 29 has the same structure as the teeth of the linear rack 40. After the sliding member 28 moves, the paddle block 29 moves to the position of the drive gear 39 and is actuated, causing the paddle block 29 to slide on the sliding member 28. When the sliding member 28 or the paddle block 29 contacts the limiting protrusion 32 on the base 27, the elasticity of the elastic member 31 and the actuation of the drive gear 39 realize the vibration drive of the vibrator 30.

[0074] For example, when the pressure filter is working, the external control system drives the drive gear 39 to rotate. The drive gear 39 drives the linear rack 40 to slide. The reciprocating motion of the linear rack 40 causes the push block 29 to approach the drive gear 39. After contacting the drive gear 39, it slides on the sliding member 28 under the push of the drive gear 39. When the push block 29 or the sliding member 28 touches the limiting protrusion 32 of the base 27, the restoring force generated by the elastic member 31 will cause the push block 29 to return instantly. Thus, the vibrating member 30 generates a vibration effect on the filter fan body 4 components, which effectively improves the filtration efficiency and unloading effect.

[0075] Furthermore, such as Figure 20 As shown, the base 27 has a slide rail 41, the slider 28 is slidably disposed in the slide rail 41, the limiting protrusion 32 is located at both ends of the slider 28, and also includes a limiting rod 42, which is disposed on the slider 28. After the slider 28 slides, the limiting rod 42 abuts against the limiting protrusion 32 on one side.

[0076] In this embodiment, a slide rail 41 is provided on the base 27, and the slider 28 is designed to slide freely within the slide rail 41 to ensure its smooth and guiding movement. Limiting protrusions 32 are located at both ends of the slider 28, limiting its sliding range. A limiting rod 42 is added to the slider 28. When the slider 28 slides along the slide rail 41 to its limit position, the limiting rod 42 contacts the limiting protrusion 32 at one end of the slider 28, thereby preventing the slider 28 from continuing to slide and ensuring that the slider 28 operates within its specified stroke, avoiding excessive impact or disengagement from the slide rail 41.

[0077] For example, during the operation of the pressure filter, when it is necessary to drive the vibrating element 30 to vibrate the filter fan body 4, a motor 43 is installed on the base 27. The motor 43 drives the drive gear 39 to rotate, causing the sliding element 28 to slide within the slide rail 41. When the sliding element 28 approaches the limit protrusion 32, the limit rod 42 will first contact and abut against the limit protrusion 32. At this time, the sliding element 28 or the lever 29 will generate a certain vibration amplitude. When the vibrating element 30 is located on the lever 29, the drive gear 39 moves the lever 29 and the elastic element 31 to reset, causing the vibrating element 30 to generate a reciprocating vibration force. Alternatively, when the vibrating element 30 is located on the sliding element 28, the drive gear 39 moves the linear rack 40 and the elastic element 31 to reset, causing the vibrating element 30 to generate a reciprocating vibration force. This achieves the vibration assistance effect on the filter fan body 4, effectively improving the filtration efficiency and unloading effect.

[0078] Furthermore, such as Figure 20 , Figure 21 and Figure 22 As shown, the vibrating element 30 includes a connecting rod 30-1, an elastic telescopic element 30-2, and a vibrating element 30-3. One end of the connecting rod 30-1 is disposed on the sliding element 28 or the lever 29, located outside the filter cylinder 1, and the other end of the connecting rod 30-1 is disposed on the first transmission rod 20 / second transmission rod 21. The elastic telescopic element 30-2 is disposed on the side of the pressure plate 19 facing the filter fan body 4. There are several vibrating elements 30-3, which are correspondingly disposed on the elastic telescopic element 30-2. One vibrating element 30-3 abuts against or cancels against one filter fan body 4.

[0079] In this embodiment, one end of the connecting rod 30-1 is connected to the sliding member 28 or the lever 29, and this end is located outside the filter cylinder 1 to facilitate receiving motion commands. The other end of the connecting rod 30-1 located on one side of the filter cylinder 1 is disposed on the first transmission rod 20, and the other end of the connecting rod 30-1 located on the other side of the filter cylinder 1 is disposed on the second transmission rod 21. Several elastic telescopic members 30-2 are installed on both the first transmission rod 20 and the second transmission rod 21, and these elastic telescopic members 30-2 are arranged at certain intervals inside the filter cylinder 1. Each elastic telescopic member 30-2 has a corresponding vibrating member 30-3 at its top end. During operation, the sliding member 28 drives the first transmission rod 20 / second transmission rod 21 to move through the connecting rod 30-1, and then causes the vibrating member 30-3 to reciprocate through the elastic telescopic members 30-2. During the movement of the vibrating element 30-3, one vibrating element 30-3 will contact or release contact with its corresponding filter fan body 4 in a timely manner. Through vibration, impurities on the surface of the filter fan body 4 and inside the filter cloth are removed, achieving real-time self-cleaning of the filter cloth. The vibration of the vibrating element 30 combined with the pressurizing operation of the pressure plate 19 can form a dynamic balance of alternating pressurization and vibration cleaning on both sides of the filter fan body 4, which greatly improves the real-time self-cleaning effect of the filter cloth and the overall working efficiency of the pressure filter.

[0080] For example, in actual operation, through the transmission of the drive gear 39 and the linear rack 40, when the sliding member 28 slides within the slide rail 41, the connecting rod 30-1 on the sliding member 28 moves accordingly, driving the first transmission rod 20 / second transmission rod 21 to move. This, in turn, drives the vibrating member 30-3 to perform regular oscillating motion inside the filter cartridge 1 via the elastic telescopic member 30-2. When the vibrating member 30-3 contacts the filter fan body 4, it loosens the blockages on the filter cloth through vibration, thereby effectively improving the filtration performance of the filter cloth, increasing filtration efficiency, and extending the service life of the filter cloth.

[0081] Furthermore, such as Figure 23As shown, the vibrating element 30-3 includes support rods 30-3-1 and cleaning protrusions 30-3-2. Several support rods 30-3-1 are arranged on the elastic telescopic element 30-2; several cleaning protrusions 30-3-2 are spaced apart on the support rods 30-3-1. Several support rods 30-3-1 are designed and installed on the elastic telescopic element 30-2, and these support rods 30-3-1 are connected to the pressure plate 19 through the elastic telescopic element 30-2. When the connecting rods 30-1 move, power is transmitted to the elastic telescopic element 30-2 through the pressure plate 19, causing it to extend and retract, thereby driving the support rods 30-3-1 to perform corresponding movements. Each support rod 30-3-1 is provided with several cleaning protrusions 30-3-2 at intervals. These cleaning protrusions 30-3-2 are designed to directly contact the filter fan body 4 or filter cloth inside the filter cartridge 1. When the support rod 30-3-1 vibrates under the drive of the elastic telescopic member 30-2, the cleaning protrusions 30-3-2 will repeatedly contact and leave the surface of the filter cloth. Through this high-frequency, small-amplitude contact and release action, the fine particles on the surface of the filter cloth are shaken off and cleaned, thereby effectively preventing and solving the problem of filter cloth clogging and improving filtration efficiency. The cleaning protrusions 30-3-2 can be brushes. In specific operation, as the pressure plate 19 inside the filter cartridge 1 approaches or moves away from the filter fan body 4, and the elastic telescopic member 30-2 drives the support rod 30-3-1 to vibrate, the cleaning protrusions 30-3-2 continuously perform self-cleaning operations in the upper part of the filter cartridge 1, ensuring that the filter cloth always maintains good filtration performance.

[0082] Furthermore, such as Figure 1 , Figure 20 and Figure 24 As shown, the elastic element 31 includes a mounting sleeve 31-1, a moving rod 31-2, and a spring 31-3. Mounting sleeves 31-1 are provided on both sides of the end of the straight rack 40. The moving rod 31-2 is located between the mounting sleeve 31-1 and the lever 29. The lever 29 and the moving rod 31-2 form a sliding fit. The spring 31-3 is fitted between the mounting sleeve 31-1 and the lever 29. The length direction of the linear rack 40 is the same as the axial direction of the filter cartridge 1. Taking the linear rack 40 at the left end of the filter cartridge 1 as an example, the right end of the connecting rod 30-1 is connected to the lever 29 located on the right side of the linear rack 40. When the linear rack 40 is in a fixed position under the limit of the limiting protrusion 32, the lever 29 can slide back and forth on the two moving rods 31-2. Here, the right end of the connecting rod 30-1 is connected to the lever 29 located on the right side of the linear rack 40. Therefore, when the lever 29 on the right side of the linear rack 40 moves back and forth continuously, the pressure plate 19 on the second transmission rod 21 can produce a vibration effect.

[0083] Furthermore, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the system also includes a backwashing device 46, pipes 47, and a rotary sealing plug 48. The backwashing device 46 is located at the top of the filter cartridge 1. One end of the pipe 47 is connected to the backwashing device 46, and the other end is connected to the backwash chamber 6. The rotary sealing plug 48 is located between the end of the outer pipe 3 and the inner pipe 2. Pipes 47 are provided on both sides of the backwashing device 46. The backwashing device 46 operates with a blower in the first process and a water pump in the second process. When it operates with a blower, it is worth noting that the backwashing device 46 is equipped with a heating pipe so that the output backwash air is hot air, thereby accelerating the drying of the filter cloth and further improving the separation effect between the filter cloth and the filter cake. When it operates with a water pump, it performs backwashing self-cleaning on the filter cloth.

[0084] Furthermore, it also includes limiting frames. Limiting frames are detachably installed on both sides of the filter fan body 4 near the outer tube 3. When one side of the filter cloth is covered on one side of several filter fan bodies 4, and then the other side of the filter cloth is moved over the outer end of the filter fan body 4 and covered on the other side of the filter fan body 4, the two ends of the filter cloth are limited and fixed by the two limiting frames, while the outer end of the filter cloth is limited and locked by the retaining ring 34, thereby realizing the installation of the filter cloth. The reverse operation realizes the disassembly of the filter cloth, which facilitates the disassembly and cleaning of the filter cloth.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A filter backwash switching device, installed on the filter cartridge (1) of a pressure filter, characterized in that: include, Inner tube (2), the inner tube (2) is rotatably disposed inside the filter cylinder (1), and both ends of the inner tube (2) extend to the outside of the filter cylinder (1); An outer tube (3) is disposed around the inner tube (2), and a backflow cavity (6) is formed between the inner tube (2) and the outer tube (3). The filter fan body (4) is disposed around the outer tube (3); The switching disk (5) is located between the outer tube (3) and the filter fan body (4). The switching disk (5) has a switching channel (14) inside. After the switching disk (5) rotates, the filter fan body (4) and the switching channel (14) located in the slurry are connected to the inner tube (2) to discharge the filtrate in the filter fan body (4). The filter fan body (4) located above the slurry and the switching channel (14) are connected to the backwash chamber (6) to rinse the filter fan body (4).

2. The filter backflush switching device according to claim 1, characterized in that: It also includes, Mounting component (9): A mounting component group is provided around the outer tube (3). All mounting components (9) in the same mounting component group are arranged along the circumferential direction of the outer tube (3). The filter fan body (4) is located around the mounting component (9). The mounting component (9) is provided in a one-to-one correspondence with the filter fan body (4). The end of the mounting component (9) facing the filter fan body (4) is provided with a filtrate inlet (12) and a backflushing outlet (13). The filtrate inlet (12) and the backflushing outlet (13) are both connected to the interior of the filter fan body (4). A filter tube (10) is disposed at one end of the mounting component (9) away from the filter fan body (4) and is used to communicate with the inside of the inner tube (2); Backflush pipe (11), the backflush pipe (11) is disposed at one end of the mounting part (9) away from the filter fan body (4) for communicating with the backflush chamber (6); The switching disk (5) is rotatably mounted on the mounting component (9). After the switching disk (5) rotates, the outer end of the filter tube (10), the switching channel (14) and the filtrate inlet (12) are connected to discharge the filtrate. The outer end of the backwash pipe (11), the switching channel (14) and the backwash outlet (13) are connected to flush the filter fan body (4).

3. The filter backflush switching device according to claim 2, characterized in that: It also includes, Mounting ring (7), the mounting ring (7) is located around the outer tube (3); Support bar (8), one end of the support bar (8) is disposed on the mounting ring (7) and the other end is disposed on the filter cartridge (1); Arc-shaped rack (15), the arc-shaped rack (15) is disposed on the outer circumferential surface of the mounting ring (7), and there are two arc-shaped racks (15), the length of one arc-shaped rack (15) is greater than the length of the other arc-shaped rack (15); The transmission gear (16) is mounted on the switching disk (5). After the mounting component (9) rotates, it drives the transmission gear (16) to mesh or separate from the arc-shaped rack (15). The transmission gear (16) meshes with the arc-shaped rack (15) to drive the switching disk (5) to rotate.

4. The filter backflush switching device according to claim 2, characterized in that: A backwash channel (17) and a filter channel (18) are provided on the end face of the filter fan body (4) facing the mounting component (9). The backwash channel (17) is connected to the backwash outlet (13), and the filter channel (18) is connected to the filtrate inlet (12).

5. A filter backflush switching device according to claim 3, characterized in that: The support bars (8) are provided on both sides of the mounting ring (7).

6. A real-time self-cleaning system for filter cloth in a pressure filter press, characterized in that: Includes a filter backflush switching device as described in any one of claims 1-5.

7. The real-time self-cleaning system for filter cloth of a pressure filter press according to claim 6, characterized in that: It also includes, Pressure plate (19), the pressure plate (19) is located inside the filter cylinder (1), the pressure plate (19) is provided on both sides of the filter fan body (4), the filter fan body (4) has filter holes (23), the surface of the filter fan body (4) has filter cloth, the filter cloth is located outside the filter holes (23), and is used to filter the slurry in the filter cylinder (1); It also includes a first transmission rod (20) and a second transmission rod (21). The two pressure plates (19) located on both sides of the filter fan body (4) are respectively connected to the first transmission rod (20) and the second transmission rod (21). The first transmission rod (20) and the second transmission rod (21) are slidably disposed on the filter cylinder (1). The first transmission rod (20) is used to move the pressure plate (19) located on one side of the filter fan body (4) closer to or away from the filter fan body (4). The second transmission rod (21) is used to move the pressure plate (19) located on the other side of the filter fan body (4) closer to or away from the filter fan body (4).

8. The real-time self-cleaning system for filter cloth of a pressure filter press according to claim 6, characterized in that: It also includes a slurry injection pipe (22), which is located outside the filter cartridge (1).

9. The real-time self-cleaning system for filter cloth of a pressure filter press according to claim 6, characterized in that: It also includes, Scraper (24), the scraper (24) is disposed on the inner wall of the filter cylinder (1), the scraper (24) abuts against the surface of the filter fan body (4), and the scraper (24) has a collection hole (26). The guide (25) is disposed inside the filter cylinder (1). The guide (25) has a hollow structure. The hollow structure of the guide (25) connects the collection hole (26) with the outside of the filter cylinder (1) and is used to discharge the filter residue from the filter cylinder (1).

10. The real-time self-cleaning system for filter cloth of a pressure filter according to claim 6, characterized in that: It also includes, The base (27) is disposed on the filter cartridge (1) and has a limiting protrusion (32). A slider (28) is slidably disposed on the base (27); A lever (29) is slidably disposed on the slider (28). After the slider (28) slides, the slider (28) or the lever (29) abuts against the limiting protrusion (32). Vibrating element (30), the vibrating element (30) is disposed on the pusher block (29) or the sliding element (28), the working end of the vibrating element (30) is located inside the filter cylinder (1), and the vibrating element (30) abuts or cancels abutting the filter fan body (4) after moving. An elastic element (31) is provided at one end on the sliding element (28) and at the other end on the lever (29), for providing a force that moves the sliding element (28) and the lever (29) away from each other.

Images