Water pump inlet filtering device

Abstract

The water pump inlet filtering device comprises a main pipe, a connecting pipe, a filtering cylinder and a linear position control mechanism, the connecting pipe is obliquely installed in the middle of the main pipe, the main pipe is provided with a water inlet cavity and a water outlet cavity, and the filtering cylinder is sequentially divided into a first filtering area and a second filtering area in the direction away from the water inlet cavity; the axial lengths of the first filtering area and the second filtering area are equal, and first filtering holes are formed in the first filtering area and the second filtering area; two annular sealing structures are arranged on the inner circumferential wall of the connecting pipe, the axial distance between the two annular sealing structures is equal to the axial length of the first filtering area, the inner circumferential faces of the annular sealing structures are attached to the outer circumferential face of the filter cylinder in a sealed mode, and the inner circumferential face of the filter cylinder, the outer circumferential face of the filter cylinder and the two annular sealing structures jointly define an annular transfer cavity; the transfer cavity is communicated with the water outlet cavity; and the linear position control mechanism is used for adjusting the axial position of the filter cartridge relative to the connecting pipe. The filtering effect maintenance period can be prolonged.

Description

Technical Field

[0001] This application relates to the field of filtration devices, and more particularly to a water pump inlet filtration device. Background Technology

[0002] If there are particulate impurities in the inlet pipe during normal operation of a water pump, it will cause the pump to make a lot of noise or be damaged. Therefore, a filter device, such as a Y-type filter, is often added at the inlet of the water pump.

[0003] The Y-type filter consists of a main pipe and a connecting pipe. The connecting pipe contains a filter screen. Water enters from one end of the main pipe, passes through the filter screen in the connecting pipe, and then flows through the filter holes into the other end of the main pipe, which is the inlet of the water pump, thus completing the filtration process. When there are many impurities in the filter screen, the machine and water supply need to be stopped. Then, the filter screen can be removed by opening one end of the connecting pipe, cleaned, and reinstalled.

[0004] However, during the filtration process, the part of the filter screen closer to the outlet plays a greater role in filtration, thus accumulating more impurities in this area. Conversely, the part of the filter screen farther from the outlet accumulates relatively fewer impurities. As a result, the part of the filter screen closer to the outlet will accumulate impurities and become clogged in a shorter time, leading to a shorter filtration cycle. This results in more frequent shutdowns, which can affect the normal operating efficiency of downstream equipment and reduce production capacity. Summary of the Invention

[0005] In order to extend the filtration effect maintenance period, this application provides a water pump inlet filtration device.

[0006] This application provides a water pump inlet filtration device, which adopts the following technical solution: A water pump inlet filtration device includes a main pipe, a connecting pipe, a filter cartridge, and a linear position control mechanism. The connecting pipe is installed at an angle in the middle of the main pipe, and one end of the connecting pipe is provided with a first end cap. The main pipe has an inlet chamber and an outlet chamber. The filter cartridge is coaxially arranged with the connecting pipe, with one end of the filter cartridge having an opening and the other end being closed. The open end of the filter cartridge faces the inlet chamber. The filter cartridge is divided into a first filtration zone and a second filtration zone along the direction away from the inlet chamber. The axial lengths of the first filtration zone and the second filtration zone are equal. Both the first filtration zone and the second filtration zone are provided with first filter holes. The inner circumferential wall of the connecting pipe is provided with two annular sealing structures. The axial distance between the two annular sealing structures is equal to the axial length of the first filtration zone. The inner circumferential surface of the annular sealing structure is sealed and fitted against the outer circumferential surface of the filter cartridge. The inner circumferential surface of the filter cartridge, the outer circumferential surface of the filter cartridge, and the two annular sealing structures together form an annular transfer chamber, which is connected to the outlet chamber. The linear position control mechanism is used to adjust the axial position of the filter cartridge relative to the connecting pipe.

[0007] By adopting the above technical solution, during use, the outer peripheral surface of the first filtration zone faces the outlet chamber. That is, the water in the inlet chamber enters the outlet chamber through the inlet of the filter cartridge and the first filter hole of the first filtration zone in sequence, thereby achieving filtration. When the first filter hole in some positions of the first filtration zone is blocked, due to the existence of the transfer chamber, the water in the first filtration zone will enter the transfer chamber through the first filter hole in other positions, and then enter the outlet chamber through the transfer chamber. This ensures that the filtered impurities are more evenly distributed in various positions of the first filtration zone, thereby extending the filtration effect maintenance cycle and reducing the frequency of downtime.

[0008] Furthermore, when there are too many impurities in the first filtration zone, the linear position control mechanism is activated to drive the filter cartridge to move axially, so that the second filtration zone is connected to the transfer chamber, allowing the second filtration zone to play the main filtration role. That is, by setting the linear position control mechanism, the connection between the first filtration zone and the second filtration zone and the transfer chamber can be switched, thereby further extending the filtration effect maintenance cycle.

[0009] Optionally, the annular sealing structure includes a connecting ring and multiple elastic sealing rings. The connecting ring is made of POM material. The outer circumferential surface of the connecting ring is fixedly connected to the inner circumferential surface of the connecting pipe. The inner circumferential surface of the connecting ring is provided with multiple annular grooves. The sealing rings are located in the grooves. The inner circumferential surface of the sealing rings is elastically arranged to fit the outer circumferential surface of the filter cartridge.

[0010] By adopting the above technical solution, annular sealing is achieved through the elastic wrapping of multiple sealing rings. Furthermore, the connecting ring is made of POM material, which has high hardness and self-lubricating properties, allowing the sealing ring to have a certain degree of self-rotation within the groove. This reduces the occurrence of the sealing ring deforming and detaching from the groove due to the frictional force of the filter cartridge.

[0011] Optionally, a storage tube is connected to the middle of the main tube, and the storage tube is coaxially arranged with the connecting tube. Multiple axially stacked circular pressure plates are provided inside the storage tube. The pressure plates are made of rubber, and an abutment ring is provided on the outer circumferential surface of the pressure plate. The outer diameter of the abutment ring is equal to the inner diameter of the filter cartridge. Multiple circumferentially evenly arranged brushes are fixed to the end face of the abutment ring. A diamond-shaped hole is provided in the middle of the pressure plate, and grooves are provided at the four apex corners of the diamond-shaped hole. A limiting flange is fixed to the opening of the storage tube, and a top-compression spring is provided inside the storage tube to force the abutment ring of the pressure plate to abut against the limiting flange. A guide rod is provided at the axis of the filter cartridge, and a limiting end is fixed to the end of the guide rod. The cross-section of the guide rod is set to a diamond shape that matches the diamond-shaped hole. The filter cartridge also has a storage area located on the side of the second filtration area away from the first filtration area. A second filter hole is provided on the outer circumferential surface of the storage area. The diameter of the second filter hole is smaller than the diameter of the first filter hole. The storage area is used to store the pressure plates.

[0012] By adopting the above technical solution, after the first and second filtration zones are full of impurities, the linear position control mechanism drives the filter cylinder to move axially, causing the guide rod on the filter cylinder to extend into the storage tube. The limiting end forces the diamond-shaped hole to expand and deform, and the limiting end passes through the diamond-shaped hole. Then the filter cylinder moves in the opposite direction, and the limiting end removes the pressure plate from the storage tube (the removal force forces the abutting ring to deform and disengage from the limiting flange, and the top pressure spring forces another pressure plate to move to the opening of the storage tube). At this time, the first filtration zone is connected to the transfer chamber, and the pressure plate is brought to the opening of the filter cylinder by the guide rod. Under the water pressure of the inlet chamber, the pressure plate is pressed and moves axially along the guide rod. During this period, the abutting ring and brush of the pressure plate act on the inner peripheral wall of the filter cylinder to brush off the impurities on the inner peripheral surface of the first filtration zone, so as to restore the first filtration. The filtration effect of the filter zone is as follows: At this time, the pressure plate moves to the boundary line between the first and second filtration zones under the action of water pressure. That is, the first filtration zone is cleared, while the second filtration zone is still blocked. Then, when the first filtration zone is blocked again, the linear position control mechanism drives the filter cartridge to move axially, so that the second filtration zone is connected to the transfer chamber. At this time, the pressure plate is higher than the second filtration zone. Under the action of water pressure in the inlet chamber, the pressure plate continues to move downward to brush off the impurities on the inner circumference of the second filtration zone to restore the filtration effect of the second filtration zone. At this time, the pressure plate moves into the storage area, that is, the brushed-off impurities are confined in the storage area. After the second filtration zone is blocked again, the above process is repeated, a new pressure plate is taken out, and the blockage is gradually cleared, thereby greatly extending the maintenance cycle of the filtration effect.

[0013] The purpose of the second filter hole is to allow water between the pressure plate and the bottom of the filter cylinder to be discharged through the second filter hole during the downward movement of the pressure plate, thereby ensuring the smooth movement of the pressure plate.

[0014] Optionally, a rotation drive mechanism is also included, wherein the guide rod is rotatably connected to the filter cartridge, and the rotation drive mechanism is used to drive the guide rod to rotate, and the brush blade is in an inclined arc shape.

[0015] By adopting the above technical solution, during the process of the pressure plate moving down to clear the blockage, the rotation drive mechanism is started. Through the cooperation between the guide rod and the diamond hole, the torque of the guide rod can be transmitted to the pressure plate, driving the pressure plate to rotate. Since the brush is in an inclined arc shape, rotating the brush can sweep the impurities on the inner circumference of the filter cartridge downwards, thereby improving the impurity removal effect.

[0016] Optionally, an annular rubber sheet is coaxially provided below the pressure plate. The outer circumferential surface of the rubber sheet is fixedly connected to the brush plate. There is an axial gap between the rubber sheet and the pressure plate. Multiple partitions are integrally formed and connected between the opposite surfaces of the rubber sheet and the pressure plate. The partitions are elastic and each partition divides the axial gap between the rubber sheet and the pressure plate into multiple flushing cavities. The inner diameter of the rubber sheet and the inner diameter of the pressure plate are connected by an annular rubber corrugated section. An inlet channel is provided on the upper surface of the pressure plate, and the inlet channel communicates with the flushing cavities.

[0017] By adopting the above technical solution, during the process of the water in the inlet chamber forcing the pressure plate to move downward, the water in the inlet chamber also enters the flushing hole cavity through the inlet channel, and then is sprayed into the inner circumferential surface of the filter cartridge through the outlet of the flushing hole cavity to flush away impurities and assist the brush plate in brushing, so as to improve the unclogging effect.

[0018] Optionally, the outlet of the flushing cavity is provided with two opening and closing plates, which extend axially along the rubber sheet. One side of each opening and closing plate is fixed to the upper surface of the rubber sheet and the lower surface of the pressure plate, respectively. The other side of each opening and closing plate has a passage gap between it and the upper surface of the rubber sheet and the lower surface of the pressure plate, respectively. The inner diameter of the rubber sheet is provided with a plurality of circumferentially arranged first magnetic blocks, and the guide rod is provided with a plurality of second magnetic blocks arranged at equal intervals along the length of the guide rod. The second magnetic blocks repel the first magnetic blocks.

[0019] By adopting the above technical solution, during the downward movement of the pressure plate relative to the guide rod, the second magnetic block moves relative to the first magnetic block. During this process, the repulsive force will exhibit a periodic change of gradually increasing and gradually decreasing. When the repulsive force gradually increases, the rubber sheet expands radially and deforms, and the two opening and closing plates move closer to each other, which means that the water sprayed from the flushing cavity decreases. The radial expansion and deformation of the rubber sheet will drive the brush to move radially, making the contact force between the brush and the inner peripheral wall of the filter cartridge stronger and the cleaning effect better. When the repulsive force gradually decreases, the rubber sheet contracts radially and restores its deformation, and the two opening and closing plates move away from each other, which means that the water sprayed from the flushing cavity increases and the flushing effect is better. The brush moves radially back to its original position, resulting in a lower contact force between the brush and the inner peripheral wall of the filter cartridge.

[0020] That is, by moving the pressure plate downward, the repulsive force changes, so that the high brushing force and the high flushing force alternate, thereby comprehensively improving the unclogging effect.

[0021] Optionally, the first end cap is rotatably connected to a rotating ring, and the rotating ring is fixed with a plurality of circumferentially evenly arranged stirring blades. The stirring blades extend along the axial direction of the connecting pipe, and a magnetic strip is provided on one side of the stirring blades. The magnetic strip extends along the axial direction of the connecting pipe. The end of the filter cartridge near the first end cap is provided with an opening and a cover. The cover is rotatably connected to the filter cartridge, and the guide rod is fixedly connected to the cover. A magnetic ring is fixed on the outer circumferential surface of the cover, and the magnetic ring is magnetically attracted to the magnetic strip.

[0022] By adopting the above technical solution, the rotating drive mechanism drives the guide rod and the cylinder cover to rotate. Utilizing the magnetic attraction connection between the magnetic ring and the magnetic body, the torque of the cylinder cover is transmitted to the stirring plate. The stirring plate stirs the water on the outside of the filter cylinder to form a vortex. Under the action of centrifugal force, impurities in the water will be thrown onto the inner circumferential wall of the connector, thereby reducing the accumulation of impurities near the sealing ring and preventing the filter cylinder from slipping and jamming.

[0023] Furthermore, the combination of the magnetic ring and the magnetic strip ensures that the cylinder cover maintains its torque transmission capability during axial movement.

[0024] Optionally, the lower surface of the pressure plate is provided with a plurality of circumferentially evenly arranged stirring strips, which extend radially along the pressure plate. The lower surface of the pressure plate is integrally formed with a plurality of annular first inclined rings, and the upper surface of the pressure plate is integrally formed with a plurality of annular second inclined rings. The surfaces of the first and second inclined rings are both rough surfaces. When multiple pressure plates are stacked in the storage area, the first and second inclined rings of two adjacent pressure plates are staggered.

[0025] By adopting the above technical solution, the rotation of the pressure plate causes the stirring bar to synchronously drive the water in the storage area of ​​the filter cartridge to form a swirling flow. That is, the water located in the gap between two adjacent pressure plates forms a swirling flow. Impurities in the water at this location are subjected to centrifugal force. The greater the weight of the impurities, the greater the centrifugal force they experience. Therefore, large impurities will adhere more tightly to the rough surface of the smaller diameter first inclined ring or the smaller diameter second inclined ring, while small impurities will move to the larger diameter first inclined ring or the larger diameter second inclined ring through the misalignment gap between the first and second inclined rings. Due to the increased diameter, the centrifugal force on small impurities also increases, so small impurities will adhere more tightly to the rough surface of the larger diameter first inclined ring or the smaller diameter second inclined ring.

[0026] By setting the pressure plate to rotate and using first and second inclined rings of different diameters, impurities in the water located in the gap between two adjacent pressure plates are classified. This facilitates the observation of the impurity distribution on the pressure plate after the filter cartridge is disassembled, which helps to judge the water quality in the main pipe and effectively pre-treat the water, thereby optimizing the overall production.

[0027] Optionally, the longitudinal section of the pressure plate is V-shaped.

[0028] By adopting the above technical solution, the water pressure applied to the upper surface of the pressure plate achieves a centering effect, thereby reducing the irregular deformation of the pressure plate.

[0029] Optionally, a limiting ring is fixed to the lower surface of the pressure plate, and the central hole of the limiting ring corresponds to the diamond-shaped hole.

[0030] By adopting the above technical solution, when the limiting end moves up to pass through the diamond-shaped hole, the edge of the diamond-shaped hole elastically deforms upward. When the limiting end moves down to drive the pressure plate down, due to the restriction of the limiting ring, the edge of the diamond-shaped hole is difficult to elastically deform downward, that is, the pressure plate is not easy to detach from the limiting end, thereby improving the success rate of the limiting end driving the pressure plate down to detach from the storage tube.

[0031] In summary, this application includes at least one of the following beneficial technical effects: 1. The intermediate chamber formed by the two annular sealing structures allows water in the first filtration zone to enter the intermediate chamber through other first filter holes when some of the first filter holes in the first filtration zone become blocked. This results in the water entering the outlet chamber through the intermediate chamber, ensuring that the filtered impurities are more evenly distributed across the first filtration zone, thereby extending the filtration effect maintenance cycle and reducing the frequency of downtime. Furthermore, by setting a linear position control mechanism, the connection between the first and second filtration zones and the intermediate chamber can be switched, further extending the filtration effect maintenance cycle. 2. By setting up a pressure plate, the removal of the guide rod and the water pressure in the inlet chamber are used to clean the inner circumference of the filter cartridge. Combined with the switching between the first and second filtration zones, the pressure plate can clean the blockage in an orderly and effective manner, thereby greatly extending the maintenance cycle of the filtration effect. 3. By moving the pressure plate downward, the change in repulsive force forces the rubber sheet to deform. The positions of the opening and closing plates and the brush plates allow high brushing force and high flushing force to alternate, thereby comprehensively improving the unclogging effect. 4. By setting the rotation of the pressure plate and the first and second inclined rings with different diameters, the impurities in the water located in the gap between two adjacent pressure plates are classified. This facilitates the observation of the impurity distribution on the pressure plate after the filter cartridge is disassembled, which helps to judge the water quality in the main pipe and effectively pre-treat the water, thereby optimizing the overall production. Attached Figure Description

[0032] Figure 1 This is a cross-sectional view of the overall structure of Embodiment 1.

[0033] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0034] Figure 3 This is a cross-sectional view of the overall structure of Embodiment 2.

[0035] Figure 4 This is a cross-sectional view of the pressure plate in Example 2.

[0036] Figure 5 This is a front view of the pressure plate in Example 2.

[0037] Figure 6 This is a top view of the pressure plate in Example 2.

[0038] Figure 7 This is a cross-sectional view of the pressure plate in Example 3.

[0039] Figure 8 yes Figure 7 A magnified view of a section at point B.

[0040] Figure 9 yes Figure 7 A magnified view of a section at point C.

[0041] Figure 10 This is a cross-sectional view of the overall structure of Example 4.

[0042] Figure 11 yes Figure 10 A magnified view of a section at point D.

[0043] Figure 12 This is a cross-sectional view of the pressure plate in Example 5.

[0044] Figure 13 yes Figure 12 A magnified view of a section at point E in the middle.

[0045] Explanation of reference numerals in the attached drawings: 1. Main pipe; 2. Connecting pipe; 3. Filter cartridge; 5. Annular sealing structure; 6. Linear position control mechanism; 7. Rotary drive mechanism; 8. Pressure plate; 10. Transfer chamber; 11. Inlet chamber; 12. Outlet chamber; 13. Storage pipe; 14. Second end cap; 15. Top pressure spring; 16. Limiting flange; 21. First end cap; 22. Rotating ring; 23. Stirring blade; 24. Magnetic strip; 31. First filtration zone; 32. Second filtration zone; 33. Storage zone; 34. Guide rod; 341. Second magnetic block; 35. Limiting end 36. Head; 37. Cylinder cover; 51. Magnetic switch; 52. Connecting ring; 53. Groove; 54. Sealing ring; 65. Connecting rod; 66. Rotating block; 801. Inlet channel; 802. Flushing cavity; 81. Abutment ring; 82. Brush; 83. Through hole; 84. Limiting ring; 85. Circular piece; 851. Diamond hole; 852. Groove; 86. Rubber sheet; 861. Rubber corrugated section; 862. First magnetic block; 863. Opening and closing piece; 864. Partition; 865. Stirring bar; 866. First tilting ring; 867. Second tilting ring. Detailed Implementation

[0046] The following is in conjunction with the appendix Figure 1-13 This application will be described in further detail.

[0047] Embodiment 1 of this application discloses a water pump inlet filter device.

[0048] Reference Figure 1 The water pump inlet filtration device includes a main pipe 1, a connecting pipe 2, a filter cartridge 3, and a linear position control mechanism 6. The main pipe 1 has an inlet chamber 11 and an outlet chamber 12. The outlet chamber 12 is connected to the inlet of the water pump. The connecting pipe 2 is installed at an angle in the middle of the main pipe 1, that is, the pipe opening of the connecting pipe 2 is located at the intersection of the inlet chamber 11 and the outlet chamber 12. A first end cap 21 is detachably installed on one end of the connecting pipe 2.

[0049] The filter cartridge 3 and the connecting pipe 2 are coaxially arranged. One end of the filter cartridge 3 is open and the other end is closed. The open end of the filter cartridge 3 faces the water inlet chamber 11. The filter cartridge 3 is divided into a first filtration zone 31, a second filtration zone 32 and a storage zone 33 in sequence along the direction away from the water inlet chamber 11. The axial lengths of the first filtration zone 31 and the second filtration zone 32 are equal. Both the first filtration zone 31 and the second filtration zone 32 are provided with first filter holes. The outer peripheral surface of the storage zone 33 is provided with second filter holes. The diameter of the second filter holes is smaller than the diameter of the first filter holes.

[0050] There is an annular gap between the outer circumferential surface of the filter cartridge 3 and the inner circumferential surface of the connecting pipe 2. The inner circumferential wall of the connecting pipe 2 is provided with two annular sealing structures 5, which are located within the annular gap. The axial distance between the two annular sealing structures 5 is equal to the axial length of the first filtration zone 31. The inner circumferential surface of the filter cartridge 3, the outer circumferential surface of the filter cartridge 3, and the two annular sealing structures 5 together form an annular transfer cavity 10. The transfer cavity 10 is connected to the outlet cavity 12, that is, the water in the inlet cavity 11 passes through the filter cartridge 3, the first filter hole, and the transfer cavity 10 in sequence and enters the outlet cavity 12.

[0051] Specifically, such as Figure 2 As shown, the annular sealing structure 5 includes a connecting ring 51 and multiple elastic sealing rings 53. In this embodiment, three sealing rings 53 are provided. The connecting ring 51 is coaxially arranged with the connecting pipe 2. The connecting ring 51 is made of POM material, which has high hardness and high self-lubrication. The outer circumferential surface of the connecting ring 51 is fixedly connected to the inner circumferential surface of the connecting pipe 2. The inner circumferential surface of the connecting ring 51 is provided with multiple annular grooves 52. Part of the structure of the sealing ring 53 is located in the grooves 52. The inner circumferential surface of the sealing ring 53 elastically surrounds and fits the outer circumferential surface of the filter cartridge 3, thereby forming an annular seal.

[0052] like Figure 1 As shown, the linear position control mechanism 6 is installed on the outside of the connecting pipe 2. The linear position control mechanism 6 can be a cylinder, hydraulic cylinder or electric push rod, etc. The output end of the linear position control mechanism 6 is threadedly connected to a connecting rod 61. The connecting rod 61 passes through the first end cover 21, and an O-ring (not shown in the figure) is provided at the passing part. A rotating block 62 is fixed to the end of the connecting rod 61. The rotating block 62 is rotatably connected to the end of the filter cartridge 3. That is, the circumferential position of the filter cartridge 3 relative to the connecting pipe 2 can be controlled by the linear position control mechanism 6.

[0053] The implementation principle of Example 1 is as follows: During use, the first filtration zone 31 is connected to the transfer chamber 10. Water in the inlet chamber 11 enters the outlet chamber 12 through the opening of the filter cylinder 3 and the first filter hole of the first filtration zone 31, thereby achieving filtration. When the first filter hole in some positions of the first filtration zone 31 is blocked, due to the presence of the transfer chamber 10, the water in the first filtration zone 31 will enter the transfer chamber 10 through the first filter hole in other positions, and then enter the outlet chamber 12 through the transfer chamber 10. This makes the filtered impurities more evenly distributed in various positions of the first filtration zone 31, thereby extending the filtration effect maintenance cycle and reducing the frequency of shutdown.

[0054] Furthermore, when there are too many impurities in the first filtration zone 31, the linear position control mechanism 6 is activated to drive the filter cartridge 3 to move axially, so that the second filtration zone 32 is connected to the transfer chamber 10, so that the second filtration zone 32 plays the main filtration role, thereby further extending the filtration effect maintenance cycle.

[0055] Example 2 The difference between Example 2 and Example 1 is that, as Figure 3 As shown, the water pump inlet filter device also includes a storage pipe 13 and a rotation drive mechanism 7. The storage pipe 13 is coaxially arranged with the connecting pipe 2. One end of the storage pipe 13 is connected to the middle of the main pipe 1. The other end of the storage pipe 13 is detachably fitted with a second end cap 14. Multiple axially stacked circular pressure plates 8 are provided inside the storage pipe 13.

[0056] like Figure 4 As shown, the longitudinal section of the pressure plate 8 is V-shaped. The pressure plate 8 is made of rubber. An abutment ring 81 is integrally formed on the outer circumference of the pressure plate 8. The outer diameter of the abutment ring 81 is equal to the inner diameter of the filter cartridge 3. The opening of the storage tube 13 is fixed with a limiting flange 16. The abutment ring 81 of the pressure plate 8 located at the opening of the storage tube 13 is limited in the storage tube 13 by the limiting flange 16. A top pressure spring 15 is provided in the storage tube 13. The two ends of the top pressure spring 15 abut against the second end cap 14 and the pressure plate 8 located above, respectively. The elastic force of the top pressure spring 15 is used to force the pressure plate 8 to move down.

[0057] like Figure 5 As shown, multiple circumferentially evenly arranged brush blades 82 are fixed on the end face of the abutment ring 81. The brush blades 82 are not directly connected to the pressure plate 8, and the brush blades 82 are in an inclined arc shape.

[0058] like Figure 6 As shown, the pressure plate 8 has a through hole 83 in the middle. A circular piece 85 is integrally formed on the upper opening of the through hole 83. The circular piece 85 has a diamond-shaped hole 851. The four corners of the diamond-shaped hole 851 have grooves 852. The grooves 852 are designed to increase the ease of expansion deformation at the edge of the diamond-shaped hole 851.

[0059] Furthermore, a limiting ring 84 is coaxially fixed to the lower surface of the disc 85. The central hole of the limiting ring 84 corresponds to the diamond-shaped hole 851, that is, the limiting ring 84 is used to limit the downward elastic deformation at the edge of the diamond-shaped hole 851.

[0060] A guide rod 34 is provided at the axis of the filter cartridge 3. The cross-section of the guide rod 34 is set to be a rhombus shape that matches the rhombus hole 851. One end of the guide rod 34 is fixedly connected to the rotating block 62, that is, the guide rod 34 is rotatably connected to the filter cartridge 3. The other end of the guide rod 34 is fixed with a pointed limiting end 35. The cross-sectional area of ​​the limiting end 35 is larger than the cross-sectional area of ​​the guide rod 34.

[0061] like Figure 3 As shown, the rotation drive mechanism 7 can be a drive motor. In this embodiment, the output end of the rotation drive mechanism 7 is connected to the linear position control mechanism 6. That is, the rotation drive mechanism 7 rotates through the electric linear position control mechanism 6 to drive the guide rod 34 to rotate. However, due to the frictional damping of the annular sealing structure 5, the filter cartridge 3 is difficult to rotate with the guide rod 34.

[0062] The implementation principle of Example 2 is as follows: After the first filtration zone 31 and the second filtration zone 32 are filled with impurities (at this time, the second filtration zone 32 is located at the transfer chamber 10, while the first filtration zone 31 is closer to the opening of the storage tube 13), the linear position control mechanism 6 drives the filter cylinder 3 to move axially toward the storage tube 13 a certain distance, so that the guide rod 34 on the filter cylinder 3 extends into the storage tube 13, and the limiting end 35 passes through the through hole 83 of the lowest pressure plate 8, and the limiting end 35 forces its way through the diamond-shaped hole 851, forcing the diamond-shaped hole 851 to expand and deform, and the limiting end 35... 5. Passing through the diamond-shaped hole 851, the linear position control mechanism 6 drives the filter cartridge 3 to move in the opposite direction. The limiting end 35 removes the pressure plate 8 from the storage tube 13 (this removal force forces the abutment ring 81 to deform and elastically avoid the limiting flange 16; at the same time, the top pressure spring 15 forces another pressure plate 8 to continue moving to the opening of the storage tube 13). At this time, the first filtration zone 31 is connected to the transfer chamber 10, and the pressure plate 8 is brought to the opening of the filter cartridge 3 by the guide rod 34. Under the water pressure of the inlet chamber 11, the pressure plate 8 is pressed and moves axially along the guide rod 34. During this period, the abutment of the pressure plate 8... The ring 81 and brush 82 act on the inner circumferential wall of the filter cartridge 3 to brush off impurities from the inner circumferential surface of the first filtration zone 31. Simultaneously, the drive mechanism 7 is activated. Through the cooperation of the guide rod 34 and the diamond-shaped hole 851, the guide rod 34 drives the pressure plate 8 to rotate. The brush 82 sweeps the impurities from the inner circumferential surface of the filter cartridge 3 downwards to restore the filtration effect of the first filtration zone 31. At this time, the pressure plate 8 moves under water pressure to the boundary line between the first filtration zone 31 and the second filtration zone 32, meaning the first filtration zone 31 is cleared. The pressure plate 8 carries the cleaned impurities into the second filtration zone 32. (The second filtration zone 32 is still clogged). When the first filtration zone 31 becomes clogged again after a period of time, the linear position control mechanism 6 drives the filter cartridge 3 to move axially, so that the second filtration zone 32 is connected to the transfer chamber 10. At this time, the pressure plate 8 is higher than the second filtration zone 32. Under the water pressure of the inlet chamber 11, the pressure plate 8 continues to move down to brush off the impurities on the inner circumference of the second filtration zone 32, so as to restore the filtration effect of the second filtration zone 32. At this time, the pressure plate 8 moves to the storage area 33, and at the same time, it carries the cleaned impurities from the second filtration zone 32 to the storage area 33.

[0063] When the second filtration zone 32 becomes clogged again after a period of time, the above process is repeated. The guide rod 34 takes out a new pressure plate 8 from the storage tube 13 and gradually clears the blockage, thereby greatly extending the maintenance cycle of the filtration effect.

[0064] Example 3 The difference between Example 3 and Example 2 is that, as Figure 7 , Figure 8 , Figure 9As shown, an annular rubber sheet 86 is coaxially arranged below the pressure plate 8. The thickness of the rubber sheet 86 is less than the thickness of the pressure plate 8. The longitudinal section of the rubber sheet 86 is V-shaped. There is an axial gap between the rubber sheet 86 and the pressure plate 8. The inner diameter of the rubber sheet 86 and the inner diameter of the pressure plate 8 are connected by an annular rubber corrugated section 861. That is, the rubber corrugated section 861 allows for relative axial elastic movement between the rubber sheet 86 and the pressure plate 8. The outer circumferential surface of the rubber sheet 86 is fixedly connected to the brush plate 82.

[0065] Multiple partitions 864 are integrally formed and connected between the rubber sheet 86 and the pressure plate 8. The partitions 864 extend radially along the pressure plate 8 and are evenly arranged in a circle. The partitions 864 have great elasticity and divide the axial gap between the rubber sheet 86 and the pressure plate 8 into multiple flushing cavities 802. The flushing cavities 802 extend radially along the pressure plate 8 and are evenly arranged in a circle. The upper surface of the pressure plate 8 is provided with an inlet channel 801, which communicates with the flushing cavities 802. That is, water in the water inlet chamber 11 can enter the flushing cavity 802 through the inlet channel 801.

[0066] like Figure 8 , Figure 9 As shown, the rubber corrugated section 861 closes one end of the flushing cavity 802, while the other end of the flushing cavity 802 is inclined toward the inner circumferential surface of the filter cartridge 3. That is, the axis of the flushing cavity 802 has an acute angle with the inner circumferential surface of the filter cartridge 3. Furthermore, two opening and closing plates 863 are provided at the outlet of the flushing cavity 802. The opening and closing plates 863 extend axially along the rubber sheet 86. The two sides of the opening and closing plates 863 are fixedly connected to the partition plates 864 on both sides. The lower side of the opening and closing plate 863 near the axis of the pressure plate 8 is fixed to the upper surface of the rubber sheet 86, and the upper side of the opening and closing plate 863 has a passage gap with the pressure plate 8. The upper side of the opening and closing plate 863 away from the axis of the pressure plate 8 is fixedly connected to the lower surface of the pressure plate 8, and the lower side of the opening and closing plate 863 has a passage gap with the rubber sheet 86.

[0067] like Figure 8 As shown, the inner diameter of the rubber sheet 86 is provided with a plurality of first magnetic blocks 862 arranged circumferentially, and the guide rod 34 is provided with a plurality of second magnetic blocks 341 arranged at equal intervals along the length of the guide rod 34. The second magnetic blocks 341 can be embedded inside the guide rod 34 or embedded on the outer surface of the guide rod 34. Furthermore, the second magnetic blocks 341 and the first magnetic blocks 862 repel each other.

[0068] As the water in the inlet chamber 11 forces the pressure plate 8 to move downward, some of the water in the inlet chamber 11 will enter the flushing hole chamber 802 through the inlet channel 801, and then be sprayed into the inner circumferential surface of the filter cartridge 3 through the outlet of the flushing hole chamber 802 to flush away impurities and assist the brush plate 82 in brushing, so as to improve the unclogging effect.

[0069] Furthermore, as the pressure plate 8 moves downward relative to the guide rod 34, the second magnetic block 341 moves relative to the first magnetic block 862, and the distance between them changes. Therefore, the repulsive force will exhibit a periodic change of gradually increasing and gradually decreasing. When the repulsive force gradually increases, the rubber sheet 86 expands radially to drive one of the opening and closing plates 863 to move closer to the other opening and closing plate 863, thereby reducing the outlet diameter of the flushing cavity 802 and reducing the amount of water sprayed from the flushing cavity 802. The radial expansion and deformation of the rubber sheet 86 will also drive the brush plate 82 to move radially, making the contact force between the brush plate 82 and the inner peripheral wall of the filter cartridge 3 stronger and the cleaning effect better.

[0070] As the repulsive force gradually decreases, the rubber sheet 86 contracts radially to restore its deformation, and the two opening and closing plates 863 move away from each other. This means that the water sprayed from the flushing cavity 802 increases, resulting in a better flushing effect. Meanwhile, the brush plate 82 moves radially back to its original position, which reduces the contact force between the brush plate 82 and the inner circumferential wall of the filter cartridge 3, thus ensuring the smooth downward movement of the pressure plate 8.

[0071] The alternating switching between the tight contact state of the brush 82 and the strong flushing state of water can comprehensively improve the unclogging effect and solve the problems of the difficulty in maintaining the high pressure water jet and the difficulty in maintaining the tight contact state.

[0072] Example 4 The difference between Example 4 and Example 2 is that, as Figure 10 , Figure 11 As shown, a rotating ring 22 is coaxially rotatably connected to the first end cap 21. Multiple stirring blades 23, evenly arranged around the circumference of the filter cylinder 3, are fixed to the rotating ring 22. The stirring blades 23 are located in the gap between the filter cylinder 3 and the connecting pipe 2, and extend axially along the connecting pipe 2. A magnetic strip 24 is provided on the side of the stirring blade 23 closest to the filter cylinder 3, and the magnetic strip 24 extends axially along the connecting pipe 2.

[0073] The filter cartridge 3 has an opening and a cover 36 at the end near the first end cap 21. The cover 36 is rotatably connected to the filter cartridge 3 on the same axis. The guide rod 34 is fixedly connected to the cover 36. The connecting rod 61 is fixedly connected to the cover 36. That is, the connecting rod 61 can drive the guide rod 34 and the cover 36 to rotate relative to the filter cartridge 3.

[0074] A magnetic ring is fixed to the outer circumference of the cylinder cover 36, and the magnetic ring is magnetically connected to the magnetic strip 24.

[0075] The rotating drive mechanism 7 drives the guide rod 34 and the cylinder cover 36 to rotate through the connecting rod 61. The magnetic ring and the magnetic body are connected by magnetic attraction. The torque of the cylinder cover 36 is transmitted to the stirring plate 23. The stirring plate 23 stirs the water on the outside of the filter cylinder 3 to form a vortex. Under the action of centrifugal force, the impurities in the water will be thrown onto the inner wall of the connecting pipe 2, thereby reducing the accumulation of impurities near the sealing ring 53 and preventing the filter cylinder 3 from slipping and getting stuck.

[0076] Example 5 The difference between Example 5 and Example 4 is that, as Figure 12 , Figure 13 As shown, the lower surface of the pressure plate 8 is provided with a plurality of circumferentially evenly arranged stirring bars 865. The stirring bars 865 extend radially along the pressure plate 8. That is, when the pressure plate 8 is located in the storage area 33, the guide rod 34 drives the pressure plate 8 to rotate, and the stirring bars 865 simultaneously drive the water in the storage area 33 in the filter cartridge 3 to form a swirling flow, that is, the water located in the gap between two adjacent pressure plates 8 forms a swirling flow.

[0077] The lower surface of the pressure plate 8 is integrally formed with multiple annular first inclined rings 866, the diameter of each first inclined ring 866 gradually increases. The upper surface of the pressure plate 8 is integrally formed with multiple annular second inclined rings 867, the diameter of each second inclined ring 867 gradually increases. The surfaces of the first inclined rings 866 and the second inclined rings 867 are both rough surfaces.

[0078] When multiple pressure plates 8 are stacked in the storage area 33, the stirring bar 865 of the upper pressure plate 8 abuts against the upper side of the second inclined ring 867 of the lower pressure plate 8, causing the first inclined ring 866 and the second inclined ring 867 of adjacent pressure plates 8 to be misaligned. Since the water between adjacent pressure plates 8 is in a swirling flow, impurities in the water at this location are subjected to centrifugal force. The greater the weight of the impurities, the greater the centrifugal force they experience. Therefore, large-mass impurities will adhere more tightly to the rough surface of the smaller-diameter first inclined ring 866 or the smaller-diameter second inclined ring 867, while small-mass impurities will move through the misalignment gap between the first inclined ring 866 and the second inclined ring 867 to the larger-diameter first inclined ring 866 and the second inclined ring 867. As the diameter increases, the centrifugal force on small-mass impurities also increases, so small-mass impurities will adhere more tightly to the rough surface of the larger-diameter first inclined ring 866 or the smaller-diameter second inclined ring 867, thereby achieving the classification of impurities of different masses, such as sand, plastic fragments, and suspended lint.

[0079] After disassembling the filter cartridge 3 to remove the pressure plate 8, the distribution of impurities on the pressure plate 8 can be observed to help determine the water quality in the main pipe 1, so as to effectively pre-treat the water and optimize the overall water transportation and subsequent production.

[0080] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water pump inlet filter device, characterized in that: The system includes a main pipe (1), a connecting pipe (2), a filter cartridge (3), and a linear position control mechanism (6). The connecting pipe (2) is installed at an angle in the middle of the main pipe (1). One end of the connecting pipe (2) is provided with a first end cap (21). The main pipe (1) has an inlet chamber (11) and an outlet chamber (12). The filter cartridge (3) is coaxially arranged with the connecting pipe (2). One end of the filter cartridge (3) is open, and the other end of the filter cartridge (3) is closed. The open end of the filter cartridge (3) faces the inlet chamber (11). The filter cartridge (3) is divided into a first filtration zone (31) and a second filtration zone (32) in sequence along the direction away from the inlet chamber (11). The axial length of the first filtration zone (31) and the second filtration zone (32) is... Equally, the first filtration zone (31) and the second filtration zone (32) are both provided with first filter holes; the inner circumferential wall of the connecting pipe (2) is provided with two annular sealing structures (5), the axial distance between the two annular sealing structures (5) is equal to the axial length of the first filtration zone (31), the inner circumferential surface of the annular sealing structure (5) is sealed and fitted to the outer circumferential surface of the filter cylinder (3), the inner circumferential surface of the filter cylinder (3), the outer circumferential surface of the filter cylinder (3), and the two annular sealing structures (5) together form an annular transfer cavity (10), the transfer cavity (10) is connected to the water outlet cavity (12); the linear position control mechanism (6) is used to adjust the axial position of the filter cylinder (3) relative to the connecting pipe (2).

2. The water pump inlet filter device according to claim 1, characterized in that: The annular sealing structure (5) includes a connecting ring (51) and multiple elastic sealing rings (53). The connecting ring (51) is made of POM material. The outer circumferential surface of the connecting ring (51) is fixedly connected to the inner circumferential surface of the connecting pipe (2). The inner circumferential surface of the connecting ring (51) is provided with multiple annular grooves (52). The sealing rings (53) are located in the grooves (52). The inner circumferential surface of the sealing rings (53) is elastically wrapped around and fitted to the outer circumferential surface of the filter cartridge (3).

3. The water pump inlet filter device according to claim 1 or 2, characterized in that: The main pipe (1) is connected to a storage tube (13) in the middle. The storage tube (13) is coaxially arranged with the connecting pipe (2). The storage tube (13) is provided with multiple axially stacked circular pressure plates (8). The pressure plates (8) are made of rubber. The outer circumferential surface of the pressure plates (8) is provided with an abutment ring (81). The outer diameter of the abutment ring (81) is equal to the inner diameter of the filter cartridge (3). Multiple circumferentially evenly arranged brushes (82) are fixed on the end face of the abutment ring (81). The middle part of the pressure plate (8) is provided with a diamond-shaped hole (851). The four apex corners of the diamond-shaped hole (851) are provided with grooves (852). The opening of the storage tube (13) is fixed with a limiting flange (16). The storage tube (13) is provided with The pressure plate (8) is forced to abut against the top pressure spring (15) of the limiting flange (16); the filter cylinder (3) is provided with a guide rod (34) at the axis, and the end of the guide rod (34) is fixed with a limiting end (35). The cross-section of the guide rod (34) is set to a rhombus shape that matches the rhombus hole (851); the filter cylinder (3) also has a storage area (33), which is located on the side of the second filter area (32) away from the first filter area (31). The outer peripheral surface of the storage area (33) is provided with a second filter hole. The diameter of the second filter hole is smaller than that of the first filter hole. The storage area (33) is used to store the pressure plate (8).

4. The water pump inlet filter device according to claim 3, characterized in that: It also includes a rotation drive mechanism (7), the guide rod (34) is rotatably connected to the filter cartridge (3), the rotation drive mechanism (7) is used to drive the guide rod (34) to rotate, and the brush (82) is in an inclined arc shape.

5. The water pump inlet filter device according to claim 4, characterized in that: A ring-shaped rubber sheet (86) is coaxially provided below the pressure plate (8). The outer circumferential surface of the rubber sheet (86) is fixedly connected to the brush plate (82). There is an axial gap between the rubber sheet (86) and the pressure plate (8). Multiple partitions (864) are integrally formed and connected between the opposite surfaces of the rubber sheet (86) and the pressure plate (8). The partitions (864) are elastic. Each partition (864) divides the axial gap between the rubber sheet (86) and the pressure plate (8) into multiple flushing cavities (802). The inner diameter of the rubber sheet (86) and the inner diameter of the pressure plate (8) are connected by a ring-shaped rubber corrugated section (861). An inlet channel (801) is provided on the upper surface of the pressure plate (8). The inlet channel (801) communicates with the flushing cavity (802).

6. The water pump inlet filter device according to claim 5, characterized in that: Two opening and closing plates (863) are provided at the outlet of the flushing cavity (802). The opening and closing plates (863) extend axially along the rubber sheet (86). One side of the two opening and closing plates (863) is fixed to the upper surface of the rubber sheet (86) and the lower surface of the pressure plate (8), respectively. The other side of the two opening and closing plates (863) has a passage gap between the upper surface of the rubber sheet (86) and the lower surface of the pressure plate (8), respectively. A plurality of circumferentially arranged first magnetic blocks (862) are provided at the inner diameter of the rubber sheet (86). A plurality of second magnetic blocks (341) are arranged at equal intervals along the length direction of the guide rod (34). The second magnetic blocks (341) repel the first magnetic blocks (862).

7. The water pump inlet filter device according to claim 4, characterized in that: The first end cap (21) is rotatably connected to a rotating ring (22) on the same axis. The rotating ring (22) is fixed with a plurality of circumferentially evenly arranged stirring blades (23). The stirring blades (23) extend axially along the connecting pipe (2). A magnetic strip (24) is provided on one side of the stirring blades (23). The magnetic strip (24) extends axially along the connecting pipe (2). The end of the filter cylinder (3) near the first end cap (21) is provided with an opening and a cylinder cover (36). The cylinder cover (36) is rotatably connected to the filter cylinder (3) on the same axis. The guide rod (34) is fixedly connected to the cylinder cover (36). A magnetic ring is fixed on the outer circumferential surface of the cylinder cover (36). The magnetic ring is magnetically connected to the magnetic strip (24).

8. The water pump inlet filter device according to claim 7, characterized in that: The lower surface of the pressure plate (8) is provided with a plurality of circumferentially evenly arranged stirring strips (865), which extend radially along the pressure plate (8). The lower surface of the pressure plate (8) is integrally formed with a plurality of annular first inclined rings (866), and the upper surface of the pressure plate (8) is integrally formed with a plurality of annular second inclined rings (867). The surfaces of the first inclined rings (866) and the second inclined rings (867) are both rough surfaces. When a plurality of pressure plates (8) are stacked in the storage area (33), the first inclined rings (866) and the second inclined rings (867) of two adjacent pressure plates (8) are misaligned.

9. The water pump inlet filter device according to claim 3, characterized in that: The longitudinal section of the pressure plate (8) is V-shaped.

10. The water pump inlet filter device according to claim 3, characterized in that: The lower surface of the pressure plate (8) is fixed with a limiting ring (84), and the central hole of the limiting ring (84) corresponds to the diamond hole (851).

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