A filter element self-cleaning device

Abstract

The present invention relates to the technical field of self-cleaning filter elements, and specifically discloses a self-cleaning device for a filter element, comprising: a body, wherein 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 of the other side of the body, a filter element is provided inside the body, and the top of the filter element is rotatably connected to a connecting frame; it also comprises a drainage groove, which is fixed to the surface of the filter element, and the backwashing water flow impacts the curved surface of the drainage groove, so that the filter element rotates under the push of the flushing water flow; a cleaning component, which is arranged inside the filter element, and the cleaning component includes a cleaning brush pressed against the inner wall of the filter element, and the impurities attached to the filter element are removed by pressing the cleaning brush against the surface of the filter element; the degree of blockage of the filter element is different, and the required cleaning force is also different, and the pressing pressure of the cleaning brush on the filter element and the flushing pressure of the backwashing water flow are adjusted according to the degree of blockage of the filter element.

Description

Technical Field

[0001] The invention relates to the technical field of filter element self-cleaning, in particular to a filter element self-cleaning device for a filter. Background Art

[0002] The filter element self-cleaning device is a device used to automatically clean the filter element. It can effectively remove impurities and pollutants on the surface of the filter element without disassembling the filter, maintain the filtering performance and flux of the filter element, and 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 process. Generally, the water flow direction is switched by an electric or pneumatic valve, so that clean water reverses the filter element, flushes impurities from the surface of the filter element and discharges them from the filter. The cleaning process is automatically started at the preset time interval. Regardless of the blockage status of the filter element, cleaning will be carried out at a certain interval. This method is suitable for occasions where the water quality is relatively stable and the impurity content does not change much. It can regularly maintain the filter element to prevent excessive accumulation of impurities.

[0003] During the flushing process, the pressure on both sides is monitored to determine the blockage status, and the flushing pressure and time are adjusted according to the pressure difference. However, the flushing pressure of the entire area is the same, and it is not easy to adjust the flushing pressure according to the blockage status of a small area of the filter element. If stubborn stains are encountered in a small area, the flushing pressure is insufficient, which may cause 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 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 clogging the pores of the filter element. Over time, the flow capacity of the filter element will be greatly reduced, causing the pressure difference between the inlet and outlet of the filter to increase, and impurities will not be removed. It will remain evenly on the surface of the filter element, which will cause the local area of the filter element to bear greater filtration pressure and accelerate the wear and aging of the area. In areas without stubborn stains, if the backwash pressure is too high for a long time, the filter element material will be subjected to continuous stress, which will accelerate the aging process of the material and may cause excessive impact on the filter element, accelerate the mechanical wear of the filter element, and reduce the service life of the filter element. At the same time, it will also cause waste of water resources and increase operating costs. It may cause unnecessary damage to the filter element due to long-term backwashing, and it will also reduce the effective working time of the filter and reduce production efficiency. For this reason, we propose a filter element self-cleaning device. Summary of the Invention

[0004] The object of the present invention is to provide a filter element self-cleaning device to solve the problem in the above background technology that the flushing pressure of the entire area is the same and it is difficult to adjust the flushing pressure according to the blockage condition of a small area of the filter element.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a filter element self-cleaning device, comprising: a body, a sewage inlet being provided on one side of the body, and a backwash port and a water outlet being provided at the upper and lower ends of the other side of the body, respectively; a filter element being provided inside the body, and a connecting frame being rotatably connected to the top of the filter element;

[0006] It also includes a drainage groove, which is fixed on the surface of the filter element. The backwash water flow impacts the curved surface of the drainage groove, so that the filter element rotates under the impetus of the flushing water flow;

[0007] A cleaning assembly is provided inside the filter element and includes a cleaning brush that is pressed against the inner wall of the filter element. The cleaning brush is pressed against the surface of the filter element to remove impurities attached to the filter element.

[0008] The monitoring component and the control component are arranged on the surface of the filter element, and the control component is arranged above the cleaning brush. The monitoring component monitors the blockage status of the filter element and adjusts the distance between the cleaning brush and the filter element according to the blockage status, thereby changing the pressing pressure of the cleaning brush on the filter element;

[0009] The guide assembly and the switching assembly are arranged inside the backflushing port, and the switching assembly is arranged inside the guide assembly. The guide assembly includes a guide plate rotatably connected to the inner wall of the backflushing port. The switching assembly switches the rotation direction of the guide plate during the backflushing operation to realize the switching operation of the guide plate guiding the backflushing direction.

[0010] Wherein, a plug-in board is fixed on the back of the cleaning brush, and the plug-in board is inserted into the interior of the socket.

[0011] Among them, the socket is provided with an insert cavity inside, insert tubes are fixed at both ends of the surface of the plug board, and an insert rod 1 is inserted inside the insert tube, the end face of the insert rod 1 is fixed to the inner wall of the insert cavity, and a spring 2 is provided inside the insert tube, one end of the spring 2 is fixed to the surface of the plug board, and the other end of the spring 2 is fixed to the surface of the insert rod 1.

[0012] Among them, the monitoring component includes floating plates arranged on both sides above the recoil port, and a connecting plate is fixed on the side of the floating plate, a pressure plate is fixed on the top of the floating plate, a pressure sensor is arranged above the pressure plate, and the top of the pressure sensor is fixed on the surface of the mounting plate, and the mounting plate is fixed on the inner wall of the device body.

[0013] Among them, a second insertion rod is inserted into the interior of the connecting plate one, and the two ends of the second insertion rod are fixed to the inner wall of the device body, a push rod is fixed to the top of the connecting plate one, and a sliding plate is fixed to the side of the push rod, the sliding plate is slidably connected to the surface of the sliding rheostat, and the two ends of the sliding rheostat are fixed inside the device body, a recoil pump is provided on the side of the recoil port, and a motor is provided on the recoil pump.

[0014] Among them, the control component includes a mounting bracket fixed on the top of the cleaning brush, and a metal sheet is fixed on the surface of the mounting bracket. A slot is opened inside the connecting bracket, and a connecting plate 2 is fixed on the inner wall of the slot, and an electromagnet is fixed on the surface of the connecting plate 2.

[0015] The guide assembly includes a guide plate arranged inside the recoil port, and a rotating rod 1 is fixed at the center of the guide plate, and the bottom of the rotating rod 1 is rotatably connected to the inner wall of the recoil port.

[0016] Among them, a switching box is fixed on the top of the recoil port, and the switching assembly includes a rotating rod 2 connected to the end face of the rotating rod 1, and a rotating plate 1 is fixed on the top of the rotating rod 2, and a connecting rod is fixed on the top of the rotating plate 1, and the outer sleeve of the connecting rod is provided with a rotating plate 2.

[0017] Among them, a fixing rod 1 is fixed to the side of the surface of the rotating plate 1 away from the connecting rod, a fixing rod 2 is fixed to the surface of the rotating plate 2, and a spring 1 is arranged between the fixing rod 1 and the fixing rod 2.

[0018] Among them, the inner wall of the cleaning brush is provided with an opening, and a baffle is fixed on the inner wall of the opening, and the baffle is arranged in a "V" shape.

[0019] The present invention has at least the following beneficial effects:

[0020] Different degrees of filter blockage require different cleaning efforts. Adjust the pressure of the cleaning brush on the filter element and the flushing pressure of the backwash water flow according to the degree of filter blockage. 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 purpose of cleaning, but also reduce the energy consumption of equipment such as the backwash pump. Timely and appropriate backwashing can keep the filter element in good filtration performance. When the filter element is seriously blocked, increasing the backwash pressure can enhance the impact and shear force of the water flow on impurities. For some stubborn particles, colloids or sticky substances, More thoroughly flushes stubborn impurities from the filter element surface and pores, restores the filter element's filtration performance, improves the filter's filtration efficiency and precision, and extends the filter element's service life. Higher backwash pressure can achieve good cleaning results in a shorter time because the speed and impact of the backwash water flow increase with increased pressure. The amount of water passing through the filter element in the same time increases, carrying away more impurities. Compared with long-term low-pressure backwash cleaning, short-term high-pressure backwash cleaning reduces the running time of motors and other equipment while achieving the same cleaning effect, thereby reducing energy consumption.

[0021] If the backwash pressure is always kept too high, it may damage the filter element and shorten its service life. Reasonable adjustment of the pressure according to the blockage status can ensure the cleaning effect while avoiding damage to the filter element structure caused by excessive pressure, such as deformation of the filter element fibers and increase of pores, thereby extending the filter element replacement cycle and reducing the cost of use. Unnecessary high-pressure backwashing will consume more energy. By accurately adjusting the backwash pressure according to the blockage status of the filter element, energy waste can be avoided and energy-saving operation can be achieved.

[0022] The degree of blockage in different parts of the filter element may vary. By adjusting the position of the cleaning brush, it can be brought closer to the area with severe blockage for focused cleaning, effectively removing accumulated impurities and restoring the filtering performance of the filter element. The position of the cleaning brush can be flexibly adjusted according to the overall blockage status of the filter element to ensure that all parts of the filter element are properly cleaned, avoiding cleaning dead corners and improving the comprehensiveness and thoroughness of cleaning. If the position of the cleaning brush is fixed and not adjusted according to the blockage status, it may over-clean the parts of the filter element with less blockage, resulting in excessive pressure difference in that part, which may easily cause local damage to the filter element and unnecessary wear of the filter element material in that part. Adjusting the position can make the cleaning brush concentrate on the area that needs cleaning, reduce wear on other parts, and extend the service life of the filter element. For areas with severe blockage, if the cleaning brush is too far away, it may not be able to effectively remove impurities. Placing the cleaning brush appropriately close to the severe blockage can reduce the local pressure difference, protect the integrity of the filter element structure, quickly locate the area that needs key cleaning, and reduce the ineffective movement of the cleaning brush in unnecessary areas, thereby saving cleaning time and improving cleaning efficiency. Adjusting the cleaning brush position according to the blockage status can reasonably allocate cleaning resources, so that the cleaning brush can play the greatest role where it is most needed, avoid waste of resources, and improve overall cleaning effect and efficiency.

[0023] The switching design of the backflushing water flow direction facilitates the rotation of the cleaning brush for cleaning operations. Moreover, backflushing water flows in different directions can flush the filter element surface from different angles. The cyclic switching of the water flow direction can avoid the dead corners existing in single-direction flushing, so that all parts of the filter element surface can be flushed by the water flow, more thoroughly removing impurities and dirt attached to the inclined surface, and effectively restoring the filtering performance of the filter element. When the backflushing water flow direction changes, the direction of the impact force of the water flow on the impurities on the filter element surface also changes. This change can more effectively loosen those stubborn impurities with strong adhesion, making them more easily carried away by the water flow, thereby improving the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0025] Figure 2 It is a partial structural cross-sectional view of the device body of the present invention;

[0026] Figure 3 It is a partial structural cross-sectional view of the recoil port of the present invention;

[0027] Figure 4 It is a partial structural cross-sectional view of the filter element of the present invention;

[0028] Figure 5 for Figure 3 A magnified schematic diagram of area A in the middle;

[0029] Figure 6 A schematic diagram of the partial structure of the monitoring component of the present invention;

[0030] Figure 7 It is a partial structural diagram of the sliding rheostat of the present invention;

[0031] Figure 8 It is a partial structural sectional view of the backflush pump of the present invention;

[0032] Figure 9 It is a partial structural cross-sectional view of the socket of the present invention;

[0033] Figure 10 It is a partial structural schematic diagram of the recoil port and the guide assembly of the present invention;

[0034] Figure 11 A schematic diagram of the partial structure of the switching component of the present invention;

[0035] Figure 12 It is a schematic diagram of the local structure of the baffle of the present invention.

[0036] In the figure: 11, body; 12, sewage inlet; 13, water outlet; 14, backwash port; 15, filter element; 16, connecting frame; 17, motor; 18, backwash pump; 2, guide assembly; 21, guide plate; 22, rotating rod 1; 23, switching box; 3, switching assembly; 31, rotating rod 2; 32, rotating plate 1; 33, rotating plate 2; 34, fixed rod 1; 35, fixed rod 2; 36, spring 1; 37, connecting rod; 4, drainage groove; 5, cleaning assembly; 51, cleaning brush; 5 2. Insertion board; 53. Socket; 54. Insertion cavity; 55. Insertion tube; 56. Spring 2; 57. Insertion rod 1; 58. Opening; 59. Baffle; 6. Monitoring assembly; 61. Floating plate; 62. Connecting plate 1; 63. Insertion rod 2; 64. Pressure plate; 65. Pressure sensor; 66. Mounting plate; 7. Control assembly; 71. Mounting frame; 72. Metal sheet; 73. Slot; 74. Connecting plate 2; 75. Electromagnet; 81. Push rod; 82. Slide; 83. Sliding rheostat. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Example 1

[0039] See also Figures 1 to 9 The 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 the top of the filter element 15 is rotatably connected to a connecting frame 16;

[0040] It also includes a drainage groove 4, which is fixed on the surface of the filter element 15. The backwash water flow impacts the curved surface of the drainage groove 4, so that the filter element 15 rotates under the impetus of the flushing water flow;

[0041] The cleaning assembly 5 is disposed inside the filter element 15 and includes a cleaning brush 51 that presses against the inner wall of the filter element 15. The cleaning brush 51 presses against the surface of the filter element 15 to remove impurities attached to the filter element 15.

[0042] 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 from 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 to adjust the cleaning pressure on the inner wall of the filter element 15;

[0043] The guide assembly 2 and the switching assembly 3, the guide assembly 2 is arranged inside the backwash port 14, the switching assembly 3 is arranged inside the guide assembly 2, the guide assembly 2 includes a guide plate 21 rotatably connected to the inner wall of the backwash port 14, and the switching assembly 3 switches the rotation direction of the guide plate 21 during the backwash operation, thereby realizing the switching operation of the guide plate 21 guiding the backwash direction.

[0044] The cleaning brush 51 is provided with an insert plate 52 fixed on the back side, and the insert plate 52 is inserted into the inside of the socket 53. When the cleaning brush 51 is pressed against the inner wall of the filter element 15, the bristles of the cleaning brush 51 are in direct contact with the surface of the filter element 15. By brushing, various impurities attached to the filter element 15, such as dust, particles, fibers, etc., can be mechanically removed. 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 preventing the pores from being blocked, restoring the permeability of the filter element 15, and ensuring 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, making it easier for the backwashing water to 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.

[0045] The socket 53 is provided with an insert cavity 54 inside, and insert cylinders 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 cylinder 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 cylinder 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 fits tightly against 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.

[0046] The monitoring assembly 6 includes a floating plate 61 arranged on both sides above the backflush 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. A pressure sensor 65 is provided above the pressure plate 64, and the top of the pressure sensor 65 is fixed to the surface of the mounting plate 66. 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 status, so that it can be closer to the area with serious blockage, concentrate its power for 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 wear on other parts, and thus extend the service life of the filter element 15.

[0047] The degree of blockage in different parts of the filter element 15 may be different. By adjusting the position of the cleaning brush 51, it can be brought closer to the area with serious blockage for focused cleaning, effectively removing accumulated impurities and restoring the filtering performance of the filter element 15. The position of the cleaning brush 51 can be flexibly adjusted according to the overall blockage 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 blockage state, it may over-clean the part of the filter element 15 with less blockage, resulting in excessive pressure difference in that part, which may easily cause local damage to the filter element 15 and unnecessary wear of the filter element 15 material in that part. Adjusting the position according to the state can make the cleaning brush 51 focus on the area that needs to be cleaned, reduce wear on other parts, and extend the service life of the filter element 15. For areas with severe blockage, if the cleaning brush 51 is too far away, it may not be able to effectively remove impurities. Placing the cleaning brush 51 appropriately close to the severe blockage can reduce the local pressure difference, protect the integrity of the filter element 15 structure, quickly locate the area that needs to be cleaned, and 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 blockage state can reasonably allocate cleaning resources, so that the cleaning brush 51 can play the greatest role where it is most needed, avoid waste of resources, and improve the overall cleaning effect and efficiency.

[0048] The interior of the connecting plate 1 62 is provided with an insert rod 2 63, and the two ends of the insert rod 2 63 are fixed to the inner wall of the body 11, the top of the connecting plate 1 62 is fixed with a push rod 81, and the side of the push rod 81 is fixed with a slide 82, the slide 82 is slidably connected to the surface of the sliding rheostat 83, and the two ends of the sliding rheostat 83 are fixed to the interior of the body 11, the side of the backwash port 14 is provided with a backwash pump 18, and the backwash pump 18 is provided with a motor 17. In the self-cleaning backwash system of the filter, the backwash The pressure is related to the speed of the motor 17. When the connecting plate 1 62 moves upward, the push rod 81 moves upward synchronously, and the push rod 81 drives the slide 82 to move upward synchronously. The slide 82 moves on the surface of the sliding rheostat 83, so that the resistance of the sliding rheostat 83 decreases. When the circuit resistance decreases, according to Ohm's law, under the condition of constant voltage, the current in the circuit will increase. The motor 17 is usually driven by current. The increase in current increases the input power of the motor 17. The working principle of the motor 17 is that its speed will increase accordingly, and the motor is usually connected to the backwash pump 18 through a transmission device. The increase in the speed of the motor 17 will drive the impeller of the backwash pump 18 to speed up, thereby increasing the water pressure output by the backwash pump 18 and achieving an increase in the backwash pressure. The motor 17 is the source of power and obtains electrical energy through a 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 a key component for generating backwash pressure. Its structure usually includes an impeller, a pump casing, etc. When the impeller rotates at high speed driven by the motor 17, water will be drawn out from the external water pipe and transported from the pipe to the backwash inlet of the backwash port 14 at a higher pressure, forming a backwash water flow. Under the action of the backwash pressure, impurities attached to the surface of the filter element 15 are washed away and discharged from the filter with the backwash water flow. The relevant pipes and valves are used to guide the flow direction of the water and control the backwash cleaning process to ensure that the backwash pressure can effectively act on the filter element.

[0049] Different degrees of blockage in the filter element 15 require different cleaning forces. When the filter element 15 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 the backwash pump 18. Timely and appropriate backwashing can enable the filter element 15 to maintain good filtration performance. When the filter element 15 is seriously blocked, increasing the backwash pressure can enhance the impact and shear force of the water flow on the impurities. For some stubborn particles, colloids or sticky substances, stubbornly attached impurities can be more thoroughly washed away from the surface and pores of the filter element 15, restoring the filtration performance of the filter element 15, improving the filtration efficiency and precision of the filter, and extending the service life of the filter element 15. A higher backwash pressure can achieve a good cleaning effect in a shorter time because the speed and impact of the backwash water flow are enhanced when the pressure is increased. In the same time, the amount of water passing through the filter element 15 increases, and more impurities are removed. Compared with long-term low-pressure backwashing, short-term high-pressure backwashing reduces the operating time of equipment such as the motor 17 while achieving the same cleaning effect, thereby reducing energy consumption.

[0050] If the backwash pressure is always kept too high, it may damage the filter element 15 and shorten its service life. Reasonable adjustment of the pressure according to the blockage status can ensure the cleaning effect while avoiding structural damage to the filter element 15 due to excessive pressure, such as deformation of the filter element fibers and increase of pores, thereby extending the replacement cycle of the filter element 15 and reducing the cost of use. Unnecessary high-pressure backwashing will consume more energy. By accurately adjusting the backwash pressure according to the blockage status of the filter element 15, energy waste can be avoided and energy-saving operation can be achieved.

[0051] The control component 7 includes a mounting bracket 71 fixed to the top of the cleaning brush 51, and a metal sheet 72 is fixed to the surface of the mounting bracket 71, a slot 73 is provided inside the connecting bracket 16, and a connecting plate 2 74 is fixed to the inner wall of the slot 73, and an electromagnet 75 is fixed to the surface of the connecting plate 2 74, and a slider is provided at the bottom of the cleaning brush 51, which is slidably connected to the inside of the device body 11 to limit the movement of the cleaning brush 51, so that the movement of the cleaning brush 51 is more stable. Through the adsorption operation of the electromagnet 75 and the mounting bracket 71, the position of the cleaning brush 51 is easily adjusted, thereby realizing the adjustment operation of the cleaning pressure of the cleaning brush 51 on the surface of the filter element 15.

[0052] An opening 58 is provided on the inner wall of the cleaning brush 51, and a baffle 59 is fixed on the inner wall of the opening 58. The baffle 59 is set to a "V" shape. When the water flow hits the surface of the baffle 59, under the action of the inclined surface, the water flow reverses and flushes the inner wall of the filter element 15, assisting the cleaning brush 51 to clean the inner wall of the filter element 15. The water flow guided by the baffle 59 can quickly carry away the dirt generated during the cleaning process of the bristles, thereby preventing the dirt from accumulating or re-attaching in the cleaning area.

[0053] After the water flows into the backflush port 14, the water flows impact on the surface of the filter element 15 and between the two groups of drainage grooves 4. When a local part of the filter element 15 is blocked, the water flows accumulate between the two groups of drainage grooves 4. When the water flows accumulate too much, the float plate 61 floats on the surface of the accumulated water under the action of the accumulated water. Under the action of buoyancy, the float plate 61 moves up, and the float plate 61 drives the connecting plate 1 62 to move up synchronously. The connecting plate 1 62 moves on the outer wall of the plug rod 2 63. When the float plate 61 moves up, the pressure plate 64 presses the pressure sensor 65. After the pressure sensor 65 is pressed by the pressure plate 64, it receives a pressing signal and controls the electromagnet 75 to be energized. After the electromagnet 75 is energized, magnetism is generated. Under the action of magnetism, The metal sheet 72 is attracted, and the metal sheet 72 and the electromagnet 75 are adsorbed to each other. Under the action of suction, the cleaning brush 51 moves toward the direction close to the filter element 15, increasing the friction between the cleaning brush 51 and the filter element 15. After increasing the pressure of the cleaning brush 51 on the filter element 15 and increasing the flushing pressure of the backwash pump 18, the blockage state of the filter element 15 disappears, and the blockage is flushed away by the water flow. The water flow impacts the curved surface of the drainage groove 4, and under the guidance of the curved surface, it pushes the filter element 15 to continue to rotate, realizing continuous backwashing cleaning operation. At this time, the floating plate 61 moves downward, the contact state between the pressure sheet 64 and the pressure sensor 65 is released, and the control electromagnet 75 is powered off. Under the action of spring 2 56, the cleaning brush 51 is reset.

[0054] Example 2

[0055] Figures 10 to 12 The guide assembly 2 includes a guide plate 21 arranged inside the backwash port 14, and a rotating rod 22 is fixed at the center of the guide plate 21. The bottom of the rotating rod 22 is rotatably connected to the inner wall of the backwash port 14 to facilitate switching the direction of the backwash water flow. The cyclic switching of the water flow direction can avoid the dead corners existing in single-direction flushing and more thoroughly remove impurities and dirt attached to the inclined surface.

[0056] A switching box 23 is fixed to the top of the backflush port 14, and the switching assembly 3 includes a rotating rod 2 31 connected to the end face of the rotating rod 1 22, and a rotating plate 1 32 is fixed to the top of the rotating rod 2 31, and a connecting rod 37 is fixed to the top of the rotating plate 1 32, and a rotating plate 2 33 is sleeved on the outside of the connecting rod 37 to facilitate the rotation of the auxiliary guide plate 21 and realize the switching operation of the backflush water flow direction.

[0057] A fixing rod 1 34 is fixed to the side of the surface of the rotating plate 1 32 away from the connecting rod 37, and a fixing rod 2 35 is fixed to the surface of the rotating plate 2 33. A spring 1 36 is provided between the fixing rod 1 34 and the fixing rod 2 35. The design of the spring 1 36 facilitates the stabilization of the position of the guide plate 21.

[0058] When the water flow hits 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, and the fixed rod 1 34 moves in the 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, realizing the switching operation of the water flow direction. When the backwash cleaning operation is performed again, the water flow hits 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.

[0059] The switching design of the backflushing water flow direction facilitates the rotation of the cleaning brush 51 for cleaning operations. 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 and using the cleaning brush 51 in rotation, the wear and tear 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 can easily cause fatigue damage to the bristles.

[0060] Moreover, backflushing water flows in different directions can flush the surface of the filter element 15 from different angles. Cyclic switching of the water flow direction can avoid dead corners caused by flushing in a single direction, so that all parts of the surface of the filter element 15 can be flushed by the water flow, and impurities and dirt attached to the inclined surface can be more thoroughly removed, effectively restoring the filtering performance of the filter element 15. When the direction of the backflushing water flow changes, the direction of the impact force 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 it easier for them to be carried away by the water flow, thereby improving the flushing effect. If the direction of the backflushing water flow is fixed, impurity accumulation areas may be formed at certain positions on the inclined surface due to the flushing effect of the water flow, affecting the flushing effect. Cyclic switching of the water flow direction can disrupt the accumulation pattern of impurities, making it difficult for impurities to gather at specific positions and more evenly carried away by the water flow. 15, thereby reducing the residual impurities on the surface of the filter element. Backwash water flows in different directions form different water flow paths on the inclined surface of the filter element 15. The cyclic switching of the water flow direction can make these paths complement each other, cover more areas, and further reduce the possibility of impurity residue. The backwash water flow in a single direction may cause uneven force on the surface of the filter element 15, which may cause the structure of the filter element 15 to be deformed or damaged under long-term action. The cyclic switching of the water flow direction can make all parts of the surface of the filter element 15 evenly subjected to the impact of the water flow, reduce 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 pressure change of the water flow is relatively gentle, avoiding the impact on the filter element 15 caused by the sudden pressure change that may occur during continuous flushing in a single direction, which helps to maintain the performance and stability of the filter element 15.

[0061] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A filter element self-cleaning device, 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), 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 further comprises a drainage groove (4), wherein the drainage groove (4) is fixed on the surface of the filter element (15), and the backwash 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 removing impurities attached to the filter element (15) by pressing the cleaning brush (51) against the surface of 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 the backflushing port (14), and the switching assembly (3) is arranged inside the guide assembly (2). The guide assembly (2) includes a guide plate (21) rotatably connected to the inner wall of the backflushing port (14). The switching assembly (3) switches the rotation direction of the guide plate (21) during a backflushing operation, thereby achieving a switching operation of the guide plate (21) guiding the backflushing direction. A plug plate (52) is fixed on the back of the cleaning brush (51), and the plug plate (52) is inserted into the inside of the socket (53), and an inserting cavity (54) is opened inside the socket (53), plug tubes (55) are fixed on both ends of the surface of the plug plate (52), and an insert rod (57) is inserted inside the insert tube (55), and the end face of the insert rod (57) is fixed to the inner wall of the inserting cavity (54), and a spring (56) is provided inside the insert tube (55), one end of the spring (56) is fixed to the surface of the plug plate (52), and the other end of the spring (56) is fixed to the surface of the insert rod (57); The control assembly (7) includes 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 provided inside the connecting frame (16), and a second connecting plate (74) is fixed on the inner wall of the slot (73). An electromagnet (75) is fixed on the surface of the second connecting plate (74).

2. The filter element self-cleaning device according to claim 1, characterized in that: The monitoring assembly (6) includes floating plates (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), and 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 a mounting plate (66), and the mounting plate (66) is fixed to the inner wall of the device body (11).

3. The filter element self-cleaning device according to claim 2, characterized in that: A second insertion rod (63) is inserted into the interior of the 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 connecting plate (62), and a sliding plate (82) is fixed to the side of the push rod (81). The sliding plate (82) is slidably connected to the surface of the sliding rheostat (83), and 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).

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

5. The filter element self-cleaning device according to claim 4, characterized in that: A switching box (23) is fixed on the top of the recoil port (14), and the switching assembly (3) includes a second rotating rod (31) connected to the end face of the first rotating rod (22), and a first rotating plate (32) is fixed on the top of the second rotating rod (31), and a connecting rod (37) is fixed on the top of the first rotating plate (32), and the outer portion of the connecting rod (37) is provided with the second rotating plate (33).

6. The filter element self-cleaning device according to claim 5, characterized in that: A fixing rod 1 (34) is fixed to the side of the surface of the rotating plate 1 (32) away from the connecting rod (37), a fixing rod 2 (35) is fixed to the 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).

7. The filter element self-cleaning device according to claim 1, characterized in that: An opening (58) is formed on the inner wall of the cleaning brush (51), 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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