Self-cleaning device for filter element of filter

Abstract

The invention relates to the technical field of filter element self-cleaning, and particularly discloses a filter element self-cleaning device of a filter, the filter element self-cleaning device comprises: a device body, one side of the device body is provided with a sewage inlet, the upper and lower ends of the other side of the device body are respectively provided with a backwashing port and a water outlet, the device body is internally provided with a filter element, and the top of the filter element is rotatably connected with a connecting frame; the filter element also comprises a drainage groove, the drainage groove is fixed on the surface of the filter element, and the backwashing water flow impacts the arc-shaped surface of the drainage groove, so that the filter element rotates under the pushing of the backwashing water flow; the cleaning assembly is arranged in the filter element, the cleaning assembly comprises a cleaning brush abutting against the inner wall of the filter element, and the cleaning brush abuts against the surface of the filter element to remove impurities attached to the filter element; the filter elements are different in blockage degree, the required cleaning force is different, and the pressing pressure of the cleaning brush on the filter elements and the flushing pressure of the backwashing water flow are adjusted according to the blockage degree of the filter elements.

Description

Technical Field

[0001] The present invention relates to the technical field of self-cleaning of filter elements, and specifically to a self-cleaning device for the filter element of a filter. Background Art

[0002] The self-cleaning device for the filter element of a filter is a device used to automatically clean the filter element of a filter. Without disassembling the filter, it can effectively remove impurities and pollutants on the surface of the filter element, maintain the filtering performance and flux of the filter element, judge the degree of blockage of the filter element by monitoring the pressure difference between the inlet and outlet of the filter. When the pressure difference reaches the set value, the device automatically starts the cleaning program. Generally, it switches the water flow direction through an electric or pneumatic valve, so that the clean water flushes the filter element in the reverse direction, flushes the impurities off the surface of the filter element and discharges them from the filter. It automatically starts the cleaning process at a preset time interval. Regardless of the blockage condition of the filter element, cleaning will be carried out at regular intervals. This method is suitable for occasions where the water quality is relatively stable and the change in impurity content is small. It can regularly maintain the filter element and prevent excessive accumulation of impurities. During the flushing process, the pressure on both sides is monitored to judge the blockage state, and the flushing pressure and time are adjusted according to the pressure difference. However, the flushing pressure in the whole area is the same, and it is not easy to adjust the flushing pressure according to the blockage condition of the small area part of the filter element. If there are stubborn stains in a small area, the flushing pressure is not enough, which may cause the impurities on the surface of the filter element to continue to adhere to the surface of the filter element. Due to the low flushing pressure, the impact force of the water flow on the impurities is insufficient, and it is difficult to peel off the thick layer of impurities from the surface of the filter element. Moreover, the residual impurities will gradually accumulate, further blocking the pores of the filter element. As time goes by, the flow-through capacity of the filter element will be greatly reduced, resulting in an increase in the pressure difference between the inlet and outlet of the filter. The impurities will remain unevenly on the surface of the filter element, which will cause a greater filtering pressure on the local area of the filter element, accelerating the wear and aging of this area. In the area without stubborn stains, if the filter element is under too large a reverse flushing pressure for a long time, the filter element material will be subjected to continuous stress, which will accelerate the aging process of the material, may cause excessive impact on the filter element, accelerate the mechanical wear of the filter element, reduce the service life of the filter element. At the same time, it will also cause waste of water resources, increase the operating cost, may cause unnecessary damage to the filter element due to long-term reverse flushing, and at the same time reduce the effective working time of the filter and lower the production efficiency. For this reason, we propose a self-cleaning device for the filter element of a filter. Summary of the Invention

[0003] The purpose of the present invention is to provide a self-cleaning device for the filter element of a filter to solve the problem that the flushing pressure in the whole area is the same and it is not easy to adjust the flushing pressure according to the blockage condition of the small area part of the filter element as mentioned in the above background art.

[0004] To achieve the above object, the present invention provides the following technical solution: A self-cleaning device for the filter element of a filter, comprising: a body, a sewage inlet is provided on one side of the body, and a backwash port and a water outlet are respectively provided at the upper and lower ends on the other side of the body. A filter element is provided inside the body, and a connecting frame is rotatably connected to the top of the filter element; It further includes a drainage groove fixed on the surface of the filter element. The backwash water flow impacts on the arc surface of the drainage groove, causing the filter element to rotate under the push of the flushing water flow; A cleaning component is provided inside the filter element. The cleaning component includes a cleaning brush pressing against the inner wall of the filter element. By pressing the cleaning brush against the surface of the filter element, impurities attached to the filter element are removed; A monitoring component and a control component. The monitoring component is provided on the surface of the filter element, and the control component is provided above the cleaning brush. By monitoring the clogging state of the filter element through the monitoring component, the distance between the cleaning brush and the filter element is adjusted according to the clogging state, thereby changing the pressing pressure of the cleaning brush on the filter element; A guiding component and a switching component. The guiding component is provided inside the backwash port, and the switching component is provided inside the guiding component. The guiding component includes a guiding plate rotatably connected to the inner wall of the backwash port. By switching the rotation direction of the guiding plate during the backwash operation through the switching component, the switching operation of guiding the backwash direction by the guiding plate is realized.

[0005] Wherein, a plug board is fixed on the back surface of the cleaning brush, and the plug board is inserted into the socket.

[0006] Wherein, an insertion cavity is formed inside the socket. Two ends of the surface of the plug board are fixed with insertion cylinders, and a first insertion rod is inserted into the insertion cylinder. The end face of the first insertion rod is fixed on the inner wall of the insertion cavity. A second spring is provided inside the insertion cylinder. One end of the second spring is fixed on the surface of the plug board, and the other end of the second spring is fixed on the surface of the first insertion rod.

[0007] Wherein, the monitoring component includes floating plates provided on both sides above the port of the backwash port. A first connecting plate is fixed on the side of the floating plate. A pressing piece is fixed on the top of the floating plate. A pressure sensor is provided above the pressing piece, and the top of the pressure sensor is fixed on the surface of the mounting plate. The mounting plate is fixed on the inner wall of the body.

[0008] Wherein, a second insertion rod is inserted into the first connecting plate, and both ends of the second insertion rod are fixed on the inner wall of the body. A push rod is fixed on the top of the first connecting plate, and a sliding piece is fixed on the side of the push rod. The sliding piece is slidably connected to the surface of the sliding rheostat. Both ends of the sliding rheostat are fixed inside the body. A backwash pump is provided on the side of the backwash port, and a motor is provided on the backwash pump.

[0009] Among them, the control component includes a mounting bracket fixed to the top of the cleaning brush, and a metal sheet is fixed on the surface of the mounting bracket. A slot is formed inside the connecting bracket, and a second connecting plate is fixed to the inner wall of the slot, and an electromagnet is fixed to the surface of the second connecting plate.

[0010] Among them, the guiding component includes a guiding plate arranged inside the backwash port, and a first rotating rod is fixed at the center inside the guiding plate, and the bottom of the first rotating rod is rotatably connected to the inner wall of the backwash port.

[0011] Among them, a switching box is fixed to the top of the backwash port. The switching component includes a second rotating rod connected to the end face of the first rotating rod, and a first rotating plate is fixed to the top of the second rotating rod. A connecting rod is fixed to the top of the first rotating plate, and a second rotating plate is sleeved outside the connecting rod.

[0012] Among them, a first fixing rod is fixed to one side of the surface of the first rotating plate away from the connecting rod, and a second fixing rod is fixed to the surface of the second rotating plate. A first spring is arranged between the first fixing rod and the second fixing rod.

[0013] Among them, an opening is formed in the inner wall of the cleaning brush, and a baffle is fixed to the inner wall of the opening. The baffle is arranged in a "V" shape.

[0014] The present invention has at least the following beneficial effects: When the degree of blockage of the filter element is different, the required cleaning force is also different. The pressing pressure of the cleaning brush against the filter element and the flushing pressure of the backwash water flow are adjusted according to the degree of blockage of the filter element. When the filter element is slightly blocked, a lower backwash pressure can effectively remove impurities. Using a lower pressure for backwashing can not only achieve the cleaning purpose but also reduce the energy consumption of equipment such as backwash pumps. Timely and appropriate backwashing can keep the filter element in good filtering performance; when the filter element is severely blocked, increasing the backwash pressure can enhance the impact force and shear force of the water flow on the impurities. For some stubborn particles, colloids or viscous substances, the stubbornly attached impurities can be more thoroughly flushed off from the surface and pores of the filter element, restoring the filtering performance of the filter element, improving the filtering efficiency and accuracy of the filter, and prolonging the service life of the filter element. A larger backwash pressure can achieve a good cleaning effect in a shorter time. Because after the pressure increases, the speed and impact force of the backwash water flow increase, the amount of water passing through the filter element within the same time increases, and more impurities are carried away. Compared with long-term low-pressure backwash cleaning, short-term high-pressure backwash cleaning reduces the running time of equipment such as motors when achieving the same cleaning effect, thereby reducing energy consumption; If the backwashing pressure remains too high all the time, it may cause damage to the filter element and shorten its service life. Adjust the pressure reasonably according to the clogging state. While ensuring the cleaning effect, it can avoid the structural damage of the filter element caused by excessive pressure, such as deforming the filter element fibers and increasing the pores, so as to extend the replacement cycle of the filter element, reduce the use cost. Unnecessary high-pressure backwashing will consume more energy. By accurately adjusting the backwashing pressure according to the clogging state of the filter element, energy waste can be avoided and energy-saving operation can be achieved.

[0015] The clogging degree of different parts of the filter element may vary. By adjusting the position of the cleaning brush, it can be closer to the severely clogged area for key cleaning, effectively removing the accumulated impurities and restoring the filtering performance of the filter element. It can flexibly adjust the position of the cleaning brush according to the overall clogging state of the filter element to ensure that all parts of the filter element can be properly cleaned, avoid cleaning dead corners, and improve the comprehensiveness and thoroughness of cleaning. If the position of the cleaning brush is fixed and not adjusted according to the clogging state, it may over-clean the area with a relatively light clogging of the filter element, resulting in too large a pressure difference in this area, easily causing local damage to the filter element and unnecessary wear of the filter element material in this area. By adjusting the position according to the clogging state, the cleaning brush can be concentrated in the area that needs to be cleaned, reducing the wear on other parts and extending the service life of the filter element. For the severely clogged area, if the cleaning brush is too far away, it may not be able to effectively remove the impurities. Appropriately approaching the cleaning brush to the severely clogged area can reduce the local pressure difference, protect the integrity of the filter element structure, quickly locate the area that needs key cleaning, reduce the ineffective movement of the cleaning brush in unnecessary areas, thus saving cleaning time and improving cleaning efficiency. Adjusting the position of the cleaning brush according to the clogging state can reasonably allocate cleaning resources, make the cleaning brush play the greatest role where it is most needed, avoid resource waste, and improve the overall cleaning effect and efficiency.

[0016] Through the switching design of the backwashing water flow direction, it is convenient for the cleaning brush to rotate for cleaning operations. Moreover, the backwashing water flow in different directions can wash the surface of the filter element from different angles. Cycling and switching the water flow direction can avoid the dead corners existing in single-direction washing, enabling all parts of the filter element surface to be scoured by the water flow, more thoroughly removing the impurities and dirt adhering to the inclined surface, and effectively restoring the filtering performance of the filter element. When the backwashing water flow direction changes, the impact force direction of the water flow on the impurities on the filter element surface also changes accordingly. This change can more effectively loosen those stubborn impurities with stronger adhesion, making them easier to be carried away by the water flow, thus improving the flushing effect. Brief Description of the Drawings

[0017] Figure 1 is a three-dimensional schematic diagram of the present invention; Figure 2 is a partial structural cross-sectional view of the device body of the present invention; Figure 3This is a partial structural cross-sectional view of the backflush port of the present invention; Figure 4 This is a partial structural cross-sectional view of the filter element of the present invention; Figure 5 It is Figure 3 The enlarged schematic view of area A in Figure 6 This is a partial structural schematic view of the monitoring component of the present invention; Figure 7 This is a partial structural schematic view of the rheostat of the present invention; Figure 8 This is a partial structural cross-sectional view of the backflush pump of the present invention; Figure 9 This is a partial structural cross-sectional view of the socket of the present invention; Figure 10 This is a partial structural schematic view of the backflush port and the guiding component of the present invention; Figure 11 This is a partial structural schematic view of the switching component of the present invention; Figure 12 This is a partial structural schematic view of the baffle of the present invention.

[0018] In the figure: 11, body; 12, sewage inlet; 13, water outlet; 14, backflush port; 15, filter element; 16, connecting frame; 17, motor; 18, backflush pump; 2, guiding component; 21, guiding plate; 22, first rotating rod; 23, switching box; 3, switching component; 31, second rotating rod; 32, first rotating plate; 33, second rotating plate; 34, first fixing rod; 35, second fixing rod; 36, first spring; 37, connecting rod; 4, drainage groove; 5, cleaning component; 51, cleaning brush; 52, inserting plate; 53, socket; 54, inserting cavity; 55, inserting cylinder; 56, second spring; 57, first inserting rod; 58, opening; 59, baffle; 6, monitoring component; 61, floating plate; 62, first connecting plate; 63, second inserting rod; 64, pressing piece; 65, pressure sensor; 66, mounting plate; 7, control component; 71, mounting frame; 72, metal sheet; 73, slotted opening; 74, second connecting plate; 75, electromagnet; 81, push rod; 82, sliding piece; 83, rheostat. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1 Please refer to Figures 1 to 9The present invention provides a technical solution: a filter element self-cleaning device, comprising: a body 11, a sewage inlet 12 is provided on one side of the body 11, and a backwash port 14 and a water outlet 13 are respectively provided at the upper and lower ends of the other side of the body 11, a filter element 15 is provided inside the body 11, and a connecting frame 16 is rotatably connected to the top of the filter element 15; It also includes a drainage groove 4, which is fixed on the surface of the filter element 15, and the backwashing water flow impacts the arc surface of the drainage groove 4, so that the filter element 15 rotates under the impetus of the flushing water flow; The cleaning assembly 5 is arranged inside the filter element 15. The cleaning assembly 5 includes a cleaning brush 51 pressed against the inner wall of the filter element 15. The cleaning brush 51 is pressed against the surface of the filter element 15 to remove impurities attached to the filter element 15. The monitoring component 6 and the control component 7 are arranged on the surface of the filter element 15, and the control component 7 is arranged above the cleaning brush 51. The monitoring component 6 monitors the blockage state of the filter element 15, and adjusts the distance of the cleaning brush 51 close to the filter element 15 according to the blockage state, thereby changing the pressing pressure of the cleaning brush 51 on the filter element 15. The pressing pressure of the cleaning brush 51 on the filter element 15 is adjusted according to the blockage state, so as to adjust the cleaning pressure on the inner wall of the filter element 15; The guide component 2 and the switching component 3, the guide component 2 is arranged inside the backwash port 14, the switching component 3 is arranged inside the guide component 2, the guide component 2 includes a guide plate 21 rotatably connected to the inner wall of the backwash port 14, and the switching component 3 is used to switch the rotation direction of the guide plate 21 during the backwashing operation, thereby realizing the switching operation of the guide plate 21 guiding the backwashing direction.

[0021] A plug plate 52 is fixed to the back of the cleaning brush 51, and the plug plate 52 is inserted into the inside of the socket 53. The cleaning brush 51 is pressed against the inner wall of the filter element 15, and the bristles of the cleaning brush 51 are in direct contact with the surface of the filter element 15. Various impurities attached to the filter element 15, such as dust, particles, fibers, etc., can be mechanically removed by brushing. For some highly sticky dirt, the friction of the cleaning brush 51 can destroy the adhesion between the dirt and the surface of the filter element 15, making it easier to remove them. The bristles can bring out impurities in the pores, effectively prevent the pores from being blocked, restore the permeability of the filter element 15, and ensure the filtering effect of the filter element 15. When cooperating with the backwashing operation, the cleaning brush 51 can help loosen the impurities on the surface and in the pores of the filter element 15, so that the backwashing water can more easily wash away these impurities. At the same time, the brushing of the cleaning brush 51 can also promote the flow of backwashing water on the surface of the filter element 15, forming a more complex water flow state, enhancing the backwashing effect, and improving the cleaning efficiency.

[0022] An insert cavity 54 is provided inside the socket 53, and insert sleeves 55 are fixed at both ends of the surface of the insert plate 52, and an insert rod 1 57 is inserted inside the insert sleeve 55, and the end face of the insert rod 1 57 is fixed to the inner wall of the insert cavity 54, and a spring 2 56 is provided inside the insert sleeve 55, one end of the spring 2 56 is fixed to the surface of the insert plate 52, and the other end of the spring 2 56 is fixed to the surface of the insert rod 1 57. The insert plate 52 is inserted into the interior of the socket 53, and the outer wall of the insert plate 52 is tightly fitted to the outer wall of the socket 53, reducing the risk of sewage entering the interior of the insert cavity 54. After the insert plate 52 moves, the spring 2 56 is pulled and is in a stretched and force-accumulated state. Through this design, the telescopic operation of the cleaning brush 51 is realized, and the pressing pressure of the cleaning brush 51 on the filter element 15 is adjusted according to the blockage state. By changing the position of the cleaning brush 51, the cleaning pressure on the inner wall of the filter element 15 is adjusted.

[0023] The monitoring assembly 6 includes a floating plate 61 arranged on both sides above the backwash port 14, and a connecting plate 62 is fixed to the side of the floating plate 61, a pressure plate 64 is fixed to the top of the floating plate 61, a pressure sensor 65 is arranged above the pressure plate 64, and the top of the pressure sensor 65 is fixed to the surface of the mounting plate 66, and the mounting plate 66 is fixed to the inner wall of the body 11. The position of the cleaning brush 51 is adjusted according to the blockage state, so that it can be closer to the area with serious blockage, concentrate on key cleaning, effectively remove accumulated impurities, restore the filtering performance of the filter element 15 in this part, and achieve precise cleaning. The cleaning brush 51 can work mainly in the area that needs to be cleaned, reduce the wear on other parts, and thus extend the service life of the filter element 15.

[0024] The clogging degree of different parts of the filter element 15 may vary. By adjusting the position of the cleaning brush 51, it can be made closer to the severely clogged area for key cleaning, effectively removing the accumulated impurities, restoring the filtering performance of the filter element 15, and being able to flexibly adjust the position of the cleaning brush 51 according to the overall clogging state of the filter element 15 to ensure that all parts of the filter element 15 can be properly cleaned, avoiding cleaning dead corners, and improving the comprehensiveness and thoroughness of cleaning. If the position of the cleaning brush 51 is fixed and not adjusted according to the clogging state, it may over-clean the area with relatively light clogging of the filter element 15, resulting in too large a pressure difference in this area, easily causing local damage to the filter element 15 and unnecessary wear of the filter element 15 material in this area. However, adjusting the position according to the clogging state can make the cleaning brush 51 work concentrated in the area that needs to be cleaned, reducing wear on other parts and extending the service life of the filter element 15. For the severely clogged area, if the cleaning brush 51 is too far away, it may not be able to effectively remove the impurities. Appropriately approaching the cleaning brush 51 to the severely clogged area can reduce the local pressure difference, protect the integrity of the structure of the filter element 15, quickly locate the area that needs key cleaning, reduce the ineffective movement of the cleaning brush 51 in unnecessary areas, thereby saving cleaning time and improving cleaning efficiency. Adjusting the position of the cleaning brush 51 according to the clogging state can reasonably allocate cleaning resources, make the cleaning brush 51 play the greatest role in the place where it is most needed, avoid waste of resources, and improve the overall cleaning effect and efficiency.

[0025] A second insertion rod 63 is inserted inside the first connecting plate 62, and both ends of the second insertion rod 63 are fixed to the inner wall of the device body 11. A push rod 81 is fixed to the top of the first connecting plate 62, and a sliding piece 82 is fixed to the side of the push rod 81. The sliding piece 82 is slidably connected to the surface of the sliding rheostat 83. Both ends of the sliding rheostat 83 are fixed inside the device body 11. A backwash pump 18 is arranged on the side of the backwash port 14, and a motor 17 is arranged on the backwash pump 18. In the self-cleaning backwash system of the filter, the backwash pressure is related to the rotational speed of the motor 17. When the first connecting plate 62 moves upward, it pushes the push rod 81 to move upward synchronously. The push rod 81 drives the sliding piece 82 to move upward synchronously. The sliding piece 82 moves upward on the surface of the sliding rheostat 83, causing the resistance value of the sliding rheostat 83 to decrease. When the resistance value of the circuit decreases, according to Ohm's law, with the voltage remaining unchanged, the current in the circuit will increase. The motor 17 is usually driven by current. The increase in current causes the input power of the motor 17 to increase. According to the working principle of the motor 17, its rotational speed will increase accordingly. The motor is usually connected to the backwash pump 18 through a transmission device. The increase in the rotational speed of the motor 17 will drive the impeller of the backwash pump 18 to rotate faster, thereby increasing the water flow pressure output by the backwash pump 18 and realizing the increase in the backwash pressure. The motor 17 is the source of power, obtaining electrical energy through circuit connection. The transmission device is used to transmit the rotational motion of the motor 17 to the impeller of the backwash pump 18. The backwash pump 18 is the key component for generating the backwash pressure, and its structure usually includes an impeller, a pump casing, etc. When the impeller rotates at a high speed driven by the motor 17, water is pumped out from the external water pipe and conveyed to the backwash inlet of the backwash port 14 at a relatively high pressure, forming a backwash water flow. Under the action of the backwash pressure, the impurities attached to the surface of the filter element 15 are washed off and discharged from the filter along with the backwash water flow. The relevant pipelines and valves are used to guide the flow direction of the water flow and control the process of backwash cleaning, ensuring that the backwash pressure can effectively act on the filter element.

[0026] The degree of blockage of the filter element 15 is different, and the required cleaning intensity is also different. When the filter element 15 is slightly blocked, a lower backwashing pressure can effectively remove impurities. Using a lower pressure for backwashing can not only achieve the cleaning purpose but also reduce the energy consumption of equipment such as the backwashing pump 18. Timely and appropriate backwashing can keep the filter element 15 in good filtration performance; when the filter element 15 is severely blocked, increasing the backwashing pressure can enhance the impact force and shear force of the water flow on the impurities. For some stubborn particles, colloids or viscous substances, the stubbornly attached impurities can be more thoroughly washed off the surface and pores of the filter element 15, restoring the filtration performance of the filter element 15, improving the filtration efficiency and accuracy of the filter, and extending the service life of the filter element 15. A larger backwashing pressure can achieve a good cleaning effect in a shorter time because after the pressure increases, the speed and impact force of the backwashing water flow increase, the amount of water passing through the filter element 15 in the same time increases, and more impurities are carried away. Compared with long-term low-pressure backwashing, short-term high-pressure backwashing reduces the running time of equipment such as the motor 17 when achieving the same cleaning effect, thus reducing energy consumption; If the backwashing pressure is always kept too high, it may cause damage to the filter element 15 and shorten its service life. Reasonably adjusting the pressure according to the blockage state can avoid structural damage to the filter element 15 caused by excessive pressure while ensuring the cleaning effect, such as deforming the filter element fibers and increasing the pores, thereby extending the replacement cycle of the filter element 15 and reducing the use cost. Unnecessary high-pressure backwashing consumes more energy. By accurately adjusting the backwashing pressure according to the blockage state of the filter element 15, energy waste can be avoided and energy-saving operation can be achieved.

[0027] The control component 7 includes a mounting frame 71 fixed to the top of the cleaning brush 51, and a metal sheet 72 is fixed to the surface of the mounting frame 71. A slot 73 is opened inside the connecting frame 16, and a second connecting plate 74 is fixed to the inner wall of the slot 73. An electromagnet 75 is fixed to the surface of the second connecting plate 74. A slider is provided at the bottom of the cleaning brush 51, and the slider is slidably connected inside the device body 11 to limit the movement of the cleaning brush 51, making the movement of the cleaning brush 51 more stable. Through the adsorption operation of the electromagnet 75 and the mounting frame 71, it is convenient to adjust the position of the cleaning brush 51 and realize the adjustment operation of the cleaning pressure of the cleaning brush 51 on the surface of the filter element 15.

[0028] An opening 58 is opened on the inner wall of the cleaning brush 51, and a baffle 59 is fixed to the inner wall of the opening 58. The baffle 59 is set in a "V" shape. When the water flow impacts on the surface of the baffle 59, under the action of the inclined surface, the water flow is reversely washed on the inner wall of the filter element 15 to assist the cleaning brush 51 in cleaning the inner wall of the filter element 15. The water flow guided by the baffle 59 can quickly take away the dirt generated during the cleaning process of the bristles, preventing the dirt from accumulating or reattaching in the cleaning area.

[0029] After the water flow enters the interior of the backwash port 14, the water flow impacts on the surface of the filter element 15, and the water flow impacts between the two groups of drainage grooves 4. When a local part of the filter element 15 is blocked, the water flow accumulates between the two groups of drainage grooves 4. When the accumulated water is excessive, the floating plate 61 floats on the surface of the accumulated water under the action of the accumulated water. Under the action of buoyancy, the floating plate 61 moves upward, and the floating plate 61 drives the connecting plate one 62 to move upward synchronously. The connecting plate one 62 moves on the outer wall of the insertion rod two 63. After the floating plate 61 moves upward, the pressing piece 64 presses the pressure sensor 65. After the pressure sensor 65 is pressed by the pressing piece 64, it receives a pressing signal and controls the electromagnet 75 to be energized. After the electromagnet 75 is energized, it generates magnetism. Under the action of the magnetism, it attracts the metal piece 72, and the metal piece 72 adsorbs to the electromagnet 75. Under the action of the suction force, the cleaning brush 51 moves towards the direction close to the filter element 15, increasing the friction between the cleaning brush 51 and the filter element 15. After increasing the pressing force of the cleaning brush 51 on the filter element 15 and increasing the flushing pressure of the backwash pump 18, the blocked state of the filter element 15 disappears, and the blockage is washed away by the water flow. The water flow impacts on the arc surface of the drainage groove 4, and under the guidance of the arc surface, it pushes the filter element 15 to continue rotating, realizing continuous backwashing and cleaning operations. At this time, the floating plate 61 moves downward, and the contact state between the pressing piece 64 and the pressure sensor 65 is released, controlling the electromagnet 75 to be powered off. Under the action of the spring two 56, the cleaning brush 51 is reset.

[0030] Embodiment Two Figures 10 to 12 , the guiding assembly 2 includes a guiding plate 21 arranged inside the backwash port 14, and a rotating rod one 22 is fixed at the center inside the guiding plate 21. The bottom of the rotating rod one 22 is rotatably connected to the inner wall of the backwash port 14, which is convenient for switching the direction of the backwash water flow. Cycling through the water flow directions can avoid dead corners in single-direction flushing and more thoroughly remove impurities and dirt attached to the inclined surface.

[0031] A switching box 23 is fixed at the top of the backwash port 14. The switching assembly 3 includes a rotating rod two 31 connected to the end face of the rotating rod one 22, and a rotating plate one 32 is fixed at the top of the rotating rod two 31. A connecting rod 37 is fixed at the top of the rotating plate one 32, and a rotating plate two 33 is sleeved outside the connecting rod 37, which is convenient for assisting the rotation of the guiding plate 21 to realize the switching operation of the backwash water flow direction.

[0032] A fixing rod one 34 is fixed on one side of the surface of the rotating plate one 32 away from the connecting rod 37, and a fixing rod two 35 is fixed on the surface of the rotating plate two 33. A spring one 36 is arranged between the fixing rod one 34 and the fixing rod two 35. Through the design of the spring one 36, it is convenient to stabilize the position of the guiding plate 21.

[0033] When the water flow impacts the surface of the guide plate 21, after the guide plate 21 is impacted, the guide plate 21 is deflected under the action of the impact force, and the rotation of the guide plate 21 drives the rotating rod 1 22 to rotate synchronously, and the rotating rod 1 22 drives the rotating rod 2 31 to rotate, and the rotating rod 2 31 drives the rotating plate 1 32 to rotate synchronously. After the rotating plate 1 32 rotates, it drives the fixed rod 1 34 to rotate synchronously. After the fixed rod 1 34 rotates, it pulls the spring 1 36, and the spring 1 36 is in a stretched and force-accumulating state. The fixed rod 1 34 moves in a direction away from the fixed rod 2 35. After the rotating plate 1 32 rotates 90 degrees, the spring 1 36 returns to its initial state again, realizing the rotation operation of the rotating rod 2 31, so that the guide plate 21 rotates, and the switching operation of the water flow direction is realized. When the backwash cleaning operation is performed again, the water flow impacts the surface of the guide plate 21 again, and similarly causes the guide plate 21 to rotate, and the switching operation of the backwash water flow direction is switched again.

[0034] The switching design of the backwash water flow direction facilitates the cleaning operation of rotating the cleaning brush 51. If the same cleaning brush 51 is always used for cleaning, the bristles are easily worn, deformed or damaged due to frequent contact with dirt and the surface of the filter element 15. By switching the cleaning brush 51 in rotation, the wear during the cleaning process can be dispersed to different cleaning brushes 51, so that the frequency of use of each cleaning brush 51 is reduced, thereby extending their overall service life, allowing the cleaning brush 51 to have enough time to rest and recover, reducing the occurrence of fatigue damage, and maintaining the performance and cleaning effect of the cleaning brush 51. During the use of the cleaning brush 51, the bristles will be subjected to a certain amount of pressure and friction, and long-term continuous use will easily cause fatigue damage to the bristles.

[0035] Moreover, the recoil water flows in different directions can flush the surface of the filter element 15 from different angles. Cycling and switching the water flow direction can avoid the dead corners existing in single-direction flushing, enabling all parts of the surface of the filter element 15 to be scoured by the water flow, more thoroughly removing the impurities and dirt adhering to the inclined surface, effectively restoring the filtering performance of the filter element 15. When the direction of the recoil water flow changes, the impact force direction of the water flow on the impurities on the surface of the filter element 15 also changes accordingly. This change can more effectively loosen those stubborn impurities with strong adhesion, making them easier to be carried away by the water flow, thereby improving the flushing effect. If the recoil water flow direction is fixed, impurity accumulation areas may be formed at certain positions on the inclined surface due to the scouring action of the water flow, affecting the flushing effect. However, cycling and switching the water flow direction can disrupt the impurity accumulation pattern, making it difficult for impurities to gather at specific positions and being carried away by the water flow more evenly, reducing the residue of impurities on the surface of the filter element. The recoil water flows in different directions form different water flow paths on the inclined surface of the filter element 15. Cycling and switching the water flow direction can make these paths complement each other, covering more areas and further reducing the possibility of impurity residue. The single-direction recoil water flow may cause uneven force on the surface of the filter element 15. Under long-term action, it may cause deformation or damage to the structure of the filter element 15. Cycling and switching the water flow direction can enable all parts of the surface of the filter element 15 to be evenly subjected to the water flow impact force, reducing the situation of excessive local force, thereby protecting the structural integrity of the filter element 15 and extending the service life of the filter element 15. Each time the water flow direction is switched, the change in water pressure is relatively gentle, avoiding the impact on the filter element 15 caused by the pressure mutation that may occur during continuous flushing in a single direction. This helps to maintain the performance and stability of the filter element 15.

[0036] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter element self-cleaning device for a filter, comprising: A body (11), wherein a sewage inlet (12) is provided on one side of the body (11), and a backwash port (14) and a water outlet (13) are respectively provided at upper and lower ends of the other side of the body (11), and a filter element (15) is provided inside the body (11), and a connecting frame (16) is rotatably connected to the top of the filter element (15); The filter element (15) is characterized in that it also includes a drainage groove (4), wherein the drainage groove (4) is fixed on the surface of the filter element (15), and the backwashing water flow impacts the arc surface of the drainage groove (4), so that the filter element (15) rotates under the impetus of the flushing water flow; a cleaning assembly (5), the cleaning assembly (5) being arranged inside the filter element (15), the cleaning assembly (5) comprising a cleaning brush (51) pressed against the inner wall of the filter element (15), and the cleaning brush (51) being pressed against the surface of the filter element (15) to remove impurities attached to the filter element (15); A monitoring component (6) and a control component (7), wherein the monitoring component (6) is arranged on the surface of the filter element (15), and the control component (7) is arranged above the cleaning brush (51), and the clogging state of the filter element (15) is monitored by the monitoring component (6), and the distance between the cleaning brush (51) and the filter element (15) is adjusted according to the clogging state, thereby changing the pressing pressure of the cleaning brush (51) on the filter element (15); A guide assembly (2) and a switching assembly (3), wherein the guide assembly (2) is arranged inside a backwash port (14), and the switching assembly (3) is arranged inside the guide assembly (2). The guide assembly (2) comprises a guide plate (21) rotatably connected to the inner wall of the backwash port (14). The switching assembly (3) switches the rotation direction of the guide plate (21) during a backwash operation, thereby achieving a switching operation of the guide plate (21) guiding the backwash direction.

2. The filter element self-cleaning device of the filter according to claim 1, characterized in that: A plug plate (52) is fixed to the back of the cleaning brush (51), and the plug plate (52) is inserted into the interior of the socket (53).

3. The filter element self-cleaning device of the filter according to claim 2, characterized in that: An insert cavity (54) is provided inside the socket (53), insert tubes (55) are fixed at both ends of the surface of the plug board (52), and an insert rod (57) is inserted inside the insert tube (55), the end surface of the insert rod (57) is fixed to the inner wall of the insert cavity (54), a spring (56) is provided inside the insert tube (55), one end of the spring (56) is fixed to the surface of the plug board (52), and the other end of the spring (56) is fixed to the surface of the insert rod (57).

4. The filter element self-cleaning device of claim 1, characterized in that: The monitoring assembly (6) comprises floating plates (61) arranged on both sides above the recoil port (14), and a connecting plate (62) is fixed to the side of the floating plate (61), and a pressure plate (64) is fixed to the top of the floating plate (61), and a pressure sensor (65) is arranged above the pressure plate (64), and the top of the pressure sensor (65) is fixed to the surface of a mounting plate (66), and the mounting plate (66) is fixed to the inner wall of the device body (11).

5. The filter element self-cleaning device of claim 4, characterized in that: A second insertion rod (63) is inserted into the interior of the first connecting plate (62), and both ends of the second insertion rod (63) are fixed to the inner wall of the device body (11). A push rod (81) is fixed to the top of the first connecting plate (62), and a sliding plate (82) is fixed to the side of the push rod (81), and the sliding plate (82) is slidably connected to the surface of a sliding rheostat (83). Both ends of the sliding rheostat (83) are fixed to the interior of the device body (11). A recoil pump (18) is provided on the side of the recoil port (14), and a motor (17) is provided on the recoil pump (18).

6. The filter element self-cleaning device of the filter according to claim 3, characterized in that: The control assembly (7) comprises a mounting frame (71) fixed on the top of the cleaning brush (51), and a metal sheet (72) is fixed on the surface of the mounting frame (71), a slot (73) is formed inside the connecting frame (16), and a second connecting plate (74) is fixed on the inner wall of the slot (73), and an electromagnet (75) is fixed on the surface of the second connecting plate (74).

7. The filter element self-cleaning device of claim 1, characterized in that: A rotating rod 1 (22) is fixed at the center of the guide plate (21), and the bottom of the rotating rod 1 (22) is rotatably connected to the inner wall of the recoil port (14).

8. The filter element self-cleaning device of claim 7, characterized in that: A switch box (23) is fixed on the top of the recoil port (14), the switch assembly (3) comprises a second rotating rod (31) connected to the end surface of the first rotating rod (22), a first rotating plate (32) is fixed on the top of the second rotating rod (31), a connecting rod (37) is fixed on the top of the first rotating plate (32), and the second rotating plate (33) is sleeved on the outside of the connecting rod (37).

9. The filter element self-cleaning device of claim 8, characterized in that: A fixing rod 1 (34) is fixed to a side of the surface of the rotating plate 1 (32) away from the connecting rod (37), a fixing rod 2 (35) is fixed to a surface of the rotating plate 2 (33), and a spring 1 (36) is provided between the fixing rod 1 (34) and the fixing rod 2 (35).

10. The filter element self-cleaning device of the filter according to claim 3, characterized in that: The inner wall of the cleaning brush (51) is provided with an opening (58), and a baffle (59) is fixed to the inner wall of the opening (58), wherein the baffle (59) is arranged in a "V" shape.

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