Self-cleaning detachable screen permanent magnet submersible pump

Abstract

The application relates to the technical field of submersible pumps and discloses a self-flushing detachable filter screen permanent-magnet submersible pump, which comprises a filtering assembly, the filtering assembly comprises a fixed frame, the fixed frame is provided with a filtering unit, the fixed frame is internally provided with a floating assembly, and the fixed frame is provided with a self-flushing assembly for introducing flushing water and driving the floating assembly to move; the application combines the locking, unlocking, floating cleaning, pulsating impact and vibration auxiliary functions of the filtering unit by taking the floating assembly and the self-flushing assembly as core control structures; when the self-flushing assembly introduces flushing water, the floating ring reciprocally moves under the alternating action of the elastic force and the water flow impact force, the filtering unit repeatedly experiences the locking, unlocking, floating and resetting processes, and the pulsating cleaning is formed; in the reciprocating movement process of the floating ring, the movable block in the vibration assembly and the multiple impact blocks in the movable groove sequentially collide, intermittent vibration is generated and transmitted to the filtering unit.

Description

Technical Field

[0001] This application relates to the field of submersible pump technology, specifically to a self-flushing, removable filter permanent magnet submersible pump. Background Technology

[0002] In existing technologies, submersible pumps are widely used in various wastewater discharge scenarios, especially in areas such as construction mud discharge, catering grease wastewater treatment, and industrial wastewater discharge containing fibrous impurities. To protect the impeller and sealing structure inside the pump body and prevent large particles from entering the pump body and causing damage, a filter device is usually installed at the inlet of the submersible pump.

[0003] However, in actual use, when the discharged medium is construction mud or viscous wastewater containing grease and fibers, such liquids often contain a large number of fine, sticky impurities with extremely high adhesion properties.

[0004] Specifically, the tiny particles in the mud mix with water to form a colloidal substance. Oily substances possess viscosity and emulsifying properties, while fibrous impurities easily entangle and overlap. When these impurities impact the filter screen surface with the water flow, they quickly fill the filter screen pores and accumulate layer by layer. As the pump continues to run, the water pressure continuously presses the impurities onto the filter screen surface. Combined with the hydrostatic pressure in the wastewater medium and the inherent viscosity of the impurities, this layer of deposits adheres tightly to the filter screen, gradually forming a dense, tough, paste-like layer. The presence of this layer not only directly clogs the filter screen pores, causing a sharp decrease in the pump's influent flow and reduced operating efficiency, but more importantly, this dense deposit has strong structural stability, making it difficult for conventional self-washing methods to effectively remove it.

[0005] Common backwashing methods in the prior art usually involve spraying water onto the filter screen surface with a fixed nozzle or rinsing the outside of the filter screen with reverse water flow. However, these methods are very limited in their effectiveness when faced with a dense layer of sticky impurities.

[0006] The reason is that a continuous flow of water in a fixed direction can only wash a local area of ​​the filter screen surface and cannot generate an effective impact and peeling force on the attached layer.

[0007] Meanwhile, the water pressure of conventional backwashing is often insufficient to penetrate the dense adhesion layer and reach the filter substrate, causing the flushing water to only slide across the surface of the adhesion layer and not actually act on the blockage inside the filter mesh.

[0008] In addition, a continuous and constant rinsing water flow cannot create a dynamically changing impact force, resulting in poor removal of sticky impurities and difficulty in breaking down the adhesion interface between the adhering layer and the filter screen.

[0009] Therefore, existing backwashing technologies generally suffer from poor cleaning effects, easy clogging of filter screens, and the need for frequent shutdowns for manual cleaning when treating wastewater containing viscous impurities such as mud, grease, and fibers. These problems seriously affect the continuous operating efficiency and service life of pumps, and increase the maintenance costs and labor intensity of users. Summary of the Invention

[0010] This application provides a self-washing removable filter screen permanent magnet submersible pump. The self-washing component drives the floating component to switch between the filtration state and the rinsing state. After being unlocked, the filter unit is subject to restricted floating by the rinsing water to change the force state between the attached impurities and the filter unit, thus providing a basis for the removal of the attached impurities.

[0011] To achieve the above objectives, this application provides the following technical solution:

[0012] This application provides a self-cleaning, detachable filter permanent magnet submersible pump, including a pump body. A filter assembly is provided at the water inlet at the bottom of the pump body. The filter assembly includes a fixed frame, in which a filter unit for filtering liquid entering the pump body is provided. A floating component for controlling the locking and unlocking of the filter unit is provided inside the fixed frame. A self-cleaning component is provided on the fixed frame for introducing flushing water and driving the floating component to move. When the self-cleaning component introduces flushing water, the floating component moves to unlock the filter unit and, under the action of the flushing water, causes the filter unit to float to detach the attached material.

[0013] Furthermore, the fixed frame includes a connecting ring fixedly connected to the bottom of the pump body. Below the bottom of the connecting ring, there are multiple partition plates evenly distributed in the circumferential direction. An installation space for installing the filter unit is formed between adjacent partition plates. The ends of the multiple partition plates are connected to each other by fixing blocks to provide a supporting foundation for the installation, positioning and floating of the filter unit.

[0014] Furthermore, the filter unit includes a filter plate, a limiting block is provided on the top of the filter plate, a limiting groove adapted to the limiting block is provided on the bottom of the connecting ring, the limiting block is movably inserted in the limiting groove, the top of the filter plate is connected to the bottom of the connecting ring through an elastic element, a locking block is provided at one end of the filter plate, a locking groove adapted to the locking block is provided on the outer circumference of the fixing block, the locking block is inserted in the locking groove so that the filter plate remains in a restricted movement state within the installation position.

[0015] Furthermore, the floating assembly includes a floating ring, which is fitted inside the fixed frame and can move axially. The top of the floating ring is connected to the pump inlet via an elastic element. A guide rod is provided on the inner wall of the floating ring, and a guide hole adapted to the guide rod is opened at the pump inlet. One end of the guide rod is movably inserted into the guide hole. An extrusion block is provided on the outer wall of the floating ring, and an extrusion groove is opened on the inner wall of the filter plate. The extrusion block is movably disposed in the extrusion groove. Under the action of the elastic element, the top of the extrusion block abuts against the top of the extrusion groove, keeping the filter plate in a locked state, so as to maintain the positioning stability of the filter unit during the normal filtration stage.

[0016] Furthermore, when the pump is working, the liquid is drawn in from the inlet at the bottom of the pump body. The flowing liquid impacts the floating ring, applying an upward force to the floating ring. This force is in the same direction as the tension of the elastic element connecting the floating ring. Together, they keep the top of the extrusion block abutting against the top of the extrusion groove, thereby maintaining the locked fit of the filter plate during the filtration stage.

[0017] Furthermore, the self-rinsing assembly includes a water guide channel set on the inner wall of the fixed frame, an inlet pipe connected to the inlet of the water guide channel, the inlet pipes being symmetrically arranged on the fixed frame, a floating plate being set at the bottom of the floating ring, the top of the floating plate being fixedly connected to the floating ring via a connecting rod, the water guide channel being inclined downwards, the outlet of the water guide channel pointing towards the floating plate, and a vibration assembly being set between the floating ring and the fixed frame to convert the impact of the rinsing water into the displacement action of the floating assembly.

[0018] Furthermore, when the flushing water is delivered to the water guide channel through the inlet pipe, the flushing water is sprayed downwards along the water guide channel onto the floating plate. The impact on the floating plate causes the floating ring to move downwards against the tension of the elastic element. When the floating ring moves downwards, the squeezing block separates from the top of the squeezing groove, the filter unit is unlocked, and the flushing water enters the fixed frame and diffuses from the inside out, impacting the filter plate. This causes the filter plate to float up and down under the constraint of the limiting block and the locking block, peeling off the impurities attached to the surface of the filter plate. This transforms the flushing process from a single water flow rinsing to a dynamic flushing process accompanied by displacement changes.

[0019] Furthermore, when the pressure of the flushing water delivered by the inlet pipe fluctuates, the floating ring moves back and forth under the alternating action of the elastic element and the impact force of the flushing water, causing the filter unit to repeatedly undergo the process of locking, unlocking, floating and resetting, forming pulsating cleaning, so as to continuously apply alternating impact force to the attached impurities.

[0020] Furthermore, the vibration assembly includes a movable block disposed on the floating ring. The inner wall of the fixed frame is provided with a movable groove adapted to the movable block. One end of the movable block extends into the movable groove. Multiple impact blocks are arranged axially in the movable groove. The multiple impact blocks are evenly spaced along the length of the movable groove. When the floating ring moves up and down, the movable block moves back and forth in the movable groove and collides with the multiple impact blocks in sequence, generating vibration that is transmitted to the fixed frame and the filter unit, so as to apply additional disturbance to the attachment interface on the basis of floating cleaning.

[0021] Furthermore, the floating ring has an installation groove, the movable block is set in the installation groove, the installation groove has a rectangular groove, one end of the movable block is movably inserted into the rectangular groove, and an elastic element is set between the movable block and the rectangular groove. Under the action of the elastic element, the movable block maintains the tendency to extend into the movable groove.

[0022] The technical solution provided in this application has the following advantages compared with the prior art:

[0023] 1. This application sets up a floating component in conjunction with a self-rinsing component. When rinsing water is introduced, the floating component moves to unlock the filter unit. The filter unit floats under the action of the rinsing water. By utilizing the dynamic displacement during the floating process and the combined action of the rinsing water flow, the dense adhesion layer formed between viscous impurities and the filter screen surface is effectively destroyed.

[0024] After being unlocked, the filter unit floats in the flushing water, causing the filter plate to shift and vibrate intermittently. This dynamic change breaks the stability of the traditional fixed filter screen surface, allowing the attached layer to crack and fall off during the filter screen's floating process. At the same time, the flushing water can enter the filter screen pores for deep cleaning, thus avoiding filter screen clogging, ensuring the pump's continuous and efficient operation, reducing the frequency of downtime for manual cleaning, and solving the problem that conventional backwashing water can only surface-wash and cannot remove sticky impurities, significantly improving the cleaning effect.

[0025] 2. This application also includes a vibration component. During the up-and-down movement of the floating ring, the vibration component generates intermittent impact vibrations, which are transmitted to the fixed frame and the filter unit. This mechanical vibration disrupts the adhesion interface between the deposited layer and the filter screen, causing stubborn impurities to loosen and fall off. This, combined with floating cleaning and water flow rinsing, creates a multi-functional synergistic effect, further enhancing the filter screen's self-cleaning effect and ensuring long-term stable operation under viscous wastewater conditions. By combining the floating component with the self-rinsing component, this application allows the filter unit to switch between filtration and rinsing states. After being unlocked, it floats under the influence of rinsing water, causing viscous impurities adhering to the filter plate surface to gradually loosen and detach during displacement changes. Simultaneously, the rinsing water can further act on the filter plate's pore area, thereby improving the problem of conventional fixed filter screens relying solely on surface water rinsing and failing to remove dense deposited layers, reducing the risk of filter component clogging.

[0026] This application incorporates a vibration component, which generates intermittent impact vibrations that are transmitted to the fixed frame and filter unit during the reciprocating movement of the floating ring. This continues to disturb the already loosened attached impurities and works in synergy with the floating process of the filter unit and the flushing process of the rinsing water, further enhancing the ability to remove stubborn deposits and improving the continuous operation adaptability of the submersible pump under conditions of mud, grease, and fibrous impurities. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0029] Figure 2 This is a schematic diagram of the overall structure of the pump body and filter assembly in the embodiments of this application;

[0030] Figure 3 This is a schematic diagram of the structure of the filtering component in an embodiment of this application;

[0031] Figure 4 This is a schematic diagram of the fixed frame structure in an embodiment of this application;

[0032] Figure 5 This is a schematic diagram of the filter plate structure in an embodiment of this application;

[0033] Figure 6 This is a cross-sectional view of the fixed frame in an embodiment of this application;

[0034] Figure 7 for Figure 6 Enlarged view of the structure of section A;

[0035] Figure 8 This is a schematic diagram of the floating ring structure in an embodiment of this application;

[0036] Figure 9 This is a cross-sectional view of the extrusion groove in an embodiment of this application;

[0037] Figure 10 for Figure 9 Enlarged view of the structure of section B;

[0038] Figure 11 for Figure 8 Enlarged view of the structure of section C;

[0039] Figure 12 This is a cross-sectional view of the vibration component in an embodiment of this application;

[0040] Figure 13 for Figure 12 Enlarged view of the structure of part D in the middle.

[0041] Explanation of icon numbers:

[0042] 1. Pump body;

[0043] 2. Filter components;

[0044] 3. Fixed frame; 31. Connecting ring; 311. Limiting groove; 32. Partition plate; 33. Fixing block; 331. Slot; 34. Movable groove;

[0045] 4. Filter unit; 41. Filter plate; 411. Extrusion groove; 42. Limiting block; 43. Locking block;

[0046] 5. Floating assembly; 51. Floating ring; 52. Guide rod; 53. Extrusion block; 54. Floating plate; 55. Mounting groove;

[0047] 6. Self-rinsing assembly; 61. Water guide channel; 62. Water inlet pipe;

[0048] 7. Vibration component; 71. Moving block; 72. Impact block. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0050] The present application will be further described below with reference to embodiments.

[0051] Example 1

[0052] Reference Figure 1 - Figure 10This first embodiment of the present application provides a self-washing, detachable filter screen permanent magnet submersible pump, including a pump body 1, with a filter assembly 2 installed at the bottom inlet of the pump body 1. In practical applications, when discharging construction mud or viscous wastewater containing grease and fibers, the liquid often contains a large number of fine, sticky impurities. These impurities have extremely high adhesion properties and will gradually form a dense, tough, pasty adhesion layer on the filter screen surface. Conventional backwashing methods in the prior art usually use fixed nozzles to spray water onto the filter screen surface, or rinse the outside of the filter screen with reverse water flow. However, because this dense adhesion layer has strong structural stability and is tightly bonded to the filter screen surface, conventional continuous directional water flow can only slide across the surface of the adhesion layer and cannot penetrate the adhesion layer to reach the filter screen substrate. It is even more difficult to generate an effective impact and peeling force on the adhesion layer, resulting in very limited rinsing effect, easy clogging of the filter screen, and frequent shutdowns for manual cleaning. Therefore, a filter structure that can effectively break down the sticky adhesion layer and achieve efficient self-cleaning is needed.

[0053] The filter assembly 2 includes a fixed frame 3, within which a filter unit 4 is disposed for filtering the liquid entering the pump body 1. Inside the fixed frame 3 is a floating assembly 5 for controlling the locking and unlocking of the filter unit 4. A self-cleaning assembly 6 is disposed on the fixed frame 3 for introducing flushing water and driving the floating assembly 5. When the self-cleaning assembly 6 introduces flushing water, the floating assembly 5 activates, unlocking the filter unit 4 and causing it to float under the action of the flushing water to detach adhering substances.

[0054] The fixed frame 3 includes a connecting ring 31 fixedly connected to the bottom of the pump body 1. Multiple partition plates 32 are evenly distributed circumferentially below the connecting ring 31, forming an installation space between adjacent partition plates 32 for installing the filter unit 4. The ends of the multiple partition plates 32 are connected to each other via fixing blocks 33. The partition plates 32 serve to isolate and guide, ensuring that each filter unit 4 has an independent installation position and preventing interference between filter units 4. The fixing blocks 33 are located at the center, connecting the ends of the multiple partition plates 32 into a single unit, forming a stable central support structure, and simultaneously providing an installation foundation for the bottom of the filter unit 4.

[0055] The filter unit 4 includes a filter plate 41. A limiting block 42 is provided at the top of the filter plate 41. A limiting groove 311, adapted to the limiting block 42, is provided at the bottom of the connecting ring 31. The limiting block 42 is movably inserted into the limiting groove 311, allowing the top of the filter plate 41 to swing within a certain range without detaching from the connecting ring 31. The top of the filter plate 41 is connected to the bottom of the connecting ring 31 via an elastic element, which provides a restoring force to the filter plate 41. A locking block 43 is provided at one end of the filter plate 41. A locking groove 331, adapted to the locking block 43, is provided on the outer circumference of the fixing block 33, and the locking block 43 is inserted into the locking groove 331. The locking block 43 is made of an elastic material, such as rubber or elastic plastic, giving it a certain degree of deformation capability. Under normal filtration conditions, the locking block 43 is inserted into the locking groove 331 and works together with the limiting block 42 to restrict the displacement of the filter plate 41. When rinsing, the filter plate 41 is impacted by the water flow, and the elastic locking block 43 can generate slight swing and deformation in the locking groove 331, so that the filter plate 41 can obtain a larger floating range and a more flexible movement posture, which is conducive to the peeling off of the attached substances.

[0056] The floating assembly 5 includes a floating ring 51, which is fitted inside the fixed frame 3 and can move axially. The top of the floating ring 51 is connected to the inlet of the pump body 1 via an elastic element that provides an upward pulling force. A guide rod 52 is provided on the inner wall of the floating ring 51, and a guide hole adapted to the guide rod 52 is opened at the inlet of the pump body 1. One end of the guide rod 52 is movably inserted into the guide hole. The cooperation between the guide rod 52 and the guide hole ensures that the floating ring 51 moves smoothly in the vertical direction, avoiding deviation or jamming. A pressing block 53 is provided on the outer wall of the floating ring 51, and a pressing groove 411 is opened on the inner wall of the filter plate 41. The pressing block 53 is movably disposed in the pressing groove 411. Under the action of the elastic element, the top of the pressing block 53 abuts against the top of the pressing groove 411, so that the filter plate 41 is subjected to an outward supporting force. Together with the limiting block 42 and the locking block 43, the filter plate 41 is firmly locked in the installation position.

[0057] When the pump body 1 is working, the liquid is drawn in at high speed from the bottom inlet of the pump body 1. The flowing liquid impacts the bottom of the floating ring 51, applying an upward impact force to the floating ring 51. This force is in the same direction as the tension of the elastic element connecting the floating ring 51. The two work together to keep the top of the extrusion block 53 in close contact with the top of the extrusion groove 411, thereby ensuring the stability of the filter plate 41 in the filtration state and avoiding unnecessary shaking caused by the impact of water flow.

[0058] The self-rinsing assembly 6 includes a water guide channel 61 disposed on the inner wall of the fixed frame 3, with an inlet pipe 62 connected to the inlet of the water guide channel 61. The inlet pipes 62 are symmetrically disposed on the fixed frame 3 to ensure that the rinsing water enters evenly from both sides. A floating plate 54 is disposed at the bottom of the floating ring 51, and the top of the floating plate 54 is fixedly connected to the floating ring 51 by a connecting rod. The floating plate 54 is located below the outlet of the water guide channel 61. The water guide channel 61 is disposed at an angle downward, and the outlet of the water guide channel 61 points to the floating plate 54. A vibration assembly 7 is also disposed between the floating ring 51 and the fixed frame 3.

[0059] When the flushing water is delivered to the water guide trough 61 through the water inlet pipe 62, the flushing water is sprayed downwards at an accelerated speed along the water guide trough 61 onto the floating plate 54. The impact on the floating plate 54 causes the floating ring 51 to move downwards against the tension of the elastic element. When the floating ring 51 moves downwards, the squeezing block 53 moves downwards as well, separating from the top of the squeezing groove 411, and the filter unit 4 is released from the locked state. At the same time, after the flushing water enters the interior of the fixed frame 3, it spreads outwards from the center and impacts the inner wall of the filter plate 41, causing the filter plate 41 to float up and down and swing under the constraint of the limiting block 42 and the locking block 43. By utilizing the dynamic displacement during the floating process and the combined action of the flushing water flow, the dense adhesion layer formed between viscous impurities and the surface of the filter plate 41 is effectively destroyed.

[0060] When the pressure of the flushing water delivered by the inlet pipe 62 fluctuates, for example due to pressure pulsations in the water supply system or manual intermittent control of the inlet valve, the downward impact force on the floating ring 51 changes accordingly. When the water pressure increases, the impact force increases, and the floating ring 51 moves downward; when the water pressure decreases, the tension of the elastic element causes the floating ring 51 to move upward and reset. Under the alternating action of the tension of the elastic element and the impact force of the flushing water, the floating ring 51 moves back and forth, causing the squeezing block 53 to repeatedly separate from and contact the squeezing groove 411. The filter unit 4 thus repeatedly undergoes the process of locking, unlocking, floating, and resetting, forming a pulsed cleaning mode. During this process, the filter plate 41 floats with displacement each time it is unlocked and is briefly fixed when locked. This intermittent dynamic change causes the surface layer of the filter plate 41 to be continuously subjected to stretching, compression, and shearing, gradually producing fatigue cracks and eventually falling off; at the same time, the pulsed water flow can more effectively enter the pores of the filter plate 41 for deep cleaning, flushing out the blockages. Pulsed cleaning significantly improves the removal of viscous impurities, solving the problem that conventional constant water flow can only surface rinsing and cannot effectively destroy dense deposits.

[0061] In summary, the first embodiment of this application, by setting the floating component 5 and the self-rinsing component 6 in cooperation, uses the rinsing water to drive the floating ring 51 to move to realize the locking and unlocking of the filter unit 4, so that the filter plate 41 floats during rinsing, and uses water pressure fluctuations to form pulsating cleaning. Through the synergistic effect of the dynamic displacement of the filter plate 41 and the pulsating water flow, the dense adhesion layer formed on the surface of the filter plate 41 by viscous impurities is effectively destroyed, realizing the deep self-cleaning of the filter plate 41, avoiding clogging, and ensuring the continuous and efficient operation of the pump.

[0062] It should be noted that the elastic components in this embodiment include the elastic component connecting the top of the filter plate 41 and the bottom of the connecting ring 31, the elastic component connecting the top of the floating ring 51 and the water inlet of the pump body 1, and the elastic component disposed between the movable block 71 and the rectangular groove. Specifically, they can take various forms such as springs, sheet springs, rubber pillars, or elastic polymers. The specific type can be selected according to the installation space, the required elastic force, and the working environment. For example, sheet springs or rubber pillars can be used in areas with limited space, while helical springs can be used where greater elastic force is required. All of the above elastic components are common standard parts or conventional structures in the art. Their specific selection, installation method, and parameter settings are conventional design methods for those skilled in the art. Therefore, the specific structure and parameters of each elastic component will not be further described in this embodiment.

[0063] In addition, the filter plate 41 is uniformly provided with through holes or grooves for filtering liquids. The shape, size, and distribution density of these through holes or grooves can be conventionally designed according to the filtration accuracy requirements and liquid characteristics, and are standard features of filtration devices. To keep the drawings clear and highlight the innovations of this application, the through holes or grooves on the filter plate 41 are not shown in detail in the drawings, and their specific structure will not be described here.

[0064] Example 2

[0065] Reference Figure 11 - Figure 13 This is the second embodiment of the present application, which provides a self-cleaning, detachable filter permanent magnet submersible pump. Based on the first embodiment, a vibration component 7 is added. The vibration component 7 includes a movable block 71 disposed on a floating ring 51. The inner wall of the fixed frame 3 is provided with a movable groove 34 adapted to the movable block 71. One end of the movable block 71 extends into the movable groove 34. Multiple impact blocks 72 are arranged axially in the movable groove 34. The multiple impact blocks 72 are evenly spaced along the length direction of the movable groove 34. When the floating ring 51 moves up and down, the movable block 71 moves back and forth in the movable groove 34 and collides with the multiple impact blocks 72 in sequence, generating vibration that is transmitted to the fixed frame 3 and the filter unit 4.

[0066] The floating ring 51 has a mounting groove 55, and the movable block 71 is set in the mounting groove 55. The mounting groove 55 has a rectangular groove, and one end of the movable block 71 is movably inserted into the rectangular groove. An elastic element is provided between the movable block 71 and the bottom of the rectangular groove. The elastic element keeps the movable block 71 in a tendency to extend outward under normal conditions, ensuring that the movable block 71 always keeps in contact with the inner wall of the movable groove 34 or the impact block 72, avoiding retraction due to centrifugal force or vibration, and ensuring that the movable block 71 can effectively collide with the impact block 72 every time the floating ring 51 moves.

[0067] During the self-rinsing process, as the floating ring 51 moves up and down, the movable block 71 reciprocates within the movable groove 34, colliding sequentially with multiple impact blocks 72 distributed along the axial direction. Each collision generates an instantaneous impact vibration, which is transmitted to each filter unit 4 through the fixed frame 3. This mechanical vibration acts on the surface of the filter plate 41, effectively disrupting the adhesive interface between the adhering layer and the filter plate 41, loosening the originally tightly bound viscous impurities. Simultaneously, the vibration also accelerates the peeling off of loosened but not yet detached impurities, which are then washed away by the water flow. In the pulse cleaning mode, the reciprocating movement of the floating ring 51 causes the movable block 71 to collide with the impact blocks 72 at different positions multiple times and continuously, creating a continuous vibration effect. This, combined with the floating of the filter plate 41 and the water flow, forms a multi-synergistic effect, significantly improving the peeling effect on stubborn impurities and ensuring that the filter plate 41 remains clean and unobstructed even under extremely viscous wastewater conditions.

[0068] In summary, the second embodiment of this application, by adding a vibration component 7, generates intermittent impact vibration during the movement of the floating ring 51, and transmits the vibration to the filter unit 4. The mechanical vibration breaks the adhesion interface between the attachment layer and the filter plate 41, causing stubborn impurities to loosen and fall off. This, together with floating cleaning and water flow rinsing, forms a multiple synergistic effect, further improving the self-cleaning effect of the filter plate 41 and its ability to adapt to harsh working conditions.

[0069] As can be seen from Embodiments 1 and 2, the technical solution of this application uses the floating component 5 and the self-rinsing component 6 as the core control structure, combining multiple functions of the filter unit 4, including locking / unlocking, floating cleaning, pulsating impact, and vibration assistance. When the self-rinsing component 6 introduces rinsing water, the water flow impacts the floating plate 54, driving the floating ring 51 to move downwards, simultaneously separating the squeezing block 53 from the squeezing groove 411 to unlock the filter unit 4. At the same time, the rinsing water enters the fixed frame 3 and impacts the filter plate 41, causing it to float. When the inlet water pressure fluctuates, the floating ring 51 reciprocates under the alternating action of the elastic tension and the water flow impact, causing the filter unit 4 to repeatedly undergo the locking, unlocking, floating, and resetting process, forming pulsating cleaning. During the reciprocating movement of the floating ring 51, the movable block 71 in the vibration component 7 collides sequentially with multiple impact blocks 72 in the movable groove 34, generating intermittent vibrations that are transmitted to the filter unit 4. The entire process realizes a multi-stage self-cleaning closed loop from water flow-driven unlocking to dynamic floating cleaning, and then to vibration-assisted peeling.

[0070] The significant advantages of this application are:

[0071] First, the rapid locking and unlocking of the filter unit 4 is achieved through the mechanical cooperation between the floating ring 51 and the squeezing block 53. The locking stability is enhanced by the impact force of the incoming water flow on the floating ring 51 when the pump is working. No additional power source is required, and the structure is simple and reliable.

[0072] Secondly, by utilizing the natural fluctuations or artificial control of the flushing water pressure to form pulsating cleaning, the filter plate 41 generates intermittent floating displacement during repeated locking and unlocking, which disrupts the structural stability of the adhesive layer and solves the problem that conventional constant water flow can only surface scour and cannot remove sticky impurities.

[0073] Third, the reciprocating motion of the floating ring 51 is converted into intermittent impact vibration by the vibration component 7, which mechanically destroys the adhesion interface between impurities and filter plate 41, causing stubborn impurities to loosen and fall off. This, together with floating cleaning and water flow rinsing, forms a multi-synergistic effect, significantly improving the cleaning effect.

[0074] Fourth, the entire self-cleaning system is driven by flushing water, requiring no independent motor or controller. It has a compact structure, high reliability, and is suitable for working conditions involving viscous wastewater such as mud, grease, and fibers.

[0075] The working principle of this application is as follows:

[0076] First, when the pump is working normally, the incoming water flow impacts the bottom of the floating ring 51, and together with the elastic element, makes the top of the squeezing block 53 tightly abut against the top of the squeezing groove 411, and the filter unit 4 remains locked, filtering the liquid entering the pump body 1.

[0077] When self-cleaning is required, flushing water is introduced into the fixed frame 3 through the water inlet pipe 62. The water flow is sprayed downward along the water guide groove 61 to the floating plate 54, which impacts the floating plate 54 and drives the floating ring 51 to move downward against the tension of the elastic element. When the floating ring 51 moves downward, the squeezing block 53 separates from the squeezing groove 411, the filter unit 4 is unlocked, and at the same time, the flushing water enters the interior of the fixed frame 3 and spreads outward from the center to impact the filter plate 41, causing the filter plate 41 to float up and down under the constraint of the limiting block 42 and the locking block 43. The dynamic displacement during the floating process is used to peel off the attached impurities.

[0078] When the inlet water pressure fluctuates, the floating ring 51 moves back and forth under the alternating action of the elastic tension and the water flow impact, causing the filter unit 4 to repeatedly experience the process of locking, unlocking, floating, and resetting, forming a pulsed cleaning mode. During the reciprocating movement of the floating ring 51, the movable block 71 in the vibration component 7 moves back and forth in the movable groove 34 and collides with multiple impact blocks 72 in sequence, generating intermittent vibrations that are transmitted to the fixed frame 3 and the filter unit 4, further destroying the impurity adhesion layer through mechanical vibration.

[0079] After cleaning is completed, the introduction of rinsing water is stopped, the floating ring 51 is reset under the action of the elastic element, the squeezing block 53 is back against the top of the squeezing groove 411, the filter unit 4 is restored to the locked state, and waits for the next cleaning cycle.

[0080] In summary, this application achieves efficient self-cleaning of the filter plate 41 under viscous sewage conditions through the filter unit 4 unlocking and locking mechanism controlled by the floating component 5 and the self-washing component 6, the pulsating cleaning structure formed by water pressure fluctuations, and the vibration component 7 that converts the reciprocating motion of the floating ring 51 into mechanical vibration. This effectively solves the problem that conventional backwashing cannot peel off the dense adhesion layer and significantly improves the operational reliability and maintenance convenience of the submersible pump.

[0081] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this application.

Claims

1. A self-flushing, removable filter screen permanent magnet submersible pump, comprising a pump body (1), characterized in that: A filter assembly (2) is provided at the bottom inlet of the pump body (1). The filter assembly (2) includes a fixed frame (3). A filter unit (4) for filtering the liquid entering the pump body (1) is provided in the fixed frame (3). A floating assembly (5) for controlling the locking and unlocking of the filter unit (4) is provided inside the fixed frame (3). A self-rinsing assembly (6) for introducing flushing water and driving the floating assembly (5) is provided on the fixed frame (3). When the self-rinsing assembly (6) introduces flushing water, the floating assembly (5) moves to unlock the filter unit (4) and causes the filter unit (4) to float under the action of the flushing water to peel off the attached substances.

2. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 1, characterized in that: The fixed frame (3) includes a connecting ring (31) fixedly connected to the bottom of the pump body (1). A plurality of partition plates (32) are evenly distributed in the circumferential direction below the connecting ring (31). An installation space for installing the filter unit (4) is formed between adjacent partition plates (32). The ends of the plurality of partition plates (32) are connected to each other by fixing blocks (33).

3. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 2, characterized in that: The filter unit (4) includes a filter plate (41), a limiting block (42) is provided on the top of the filter plate (41), a limiting groove (311) adapted to the limiting block (42) is provided on the bottom of the connecting ring (31), the limiting block (42) is movably inserted in the limiting groove (311), the top of the filter plate (41) is connected to the bottom of the connecting ring (31) through an elastic element, a locking block (43) is provided at one end of the filter plate (41), a locking groove (331) adapted to the locking block (43) is provided on the outer circumference of the fixing block (33), and the locking block (43) is inserted in the locking groove (331).

4. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 3, characterized in that: The floating component (5) includes a floating ring (51), which is fitted inside the fixed frame (3) and can move axially. The top of the floating ring (51) is connected to the inlet of the pump body (1) through an elastic element. A guide rod (52) is provided on the inner wall of the floating ring (51). A guide hole adapted to the guide rod (52) is opened at the inlet of the pump body (1). One end of the guide rod (52) is movably inserted into the guide hole. A squeezing block (53) is provided on the outer wall of the floating ring (51). A squeezing groove (411) is opened on the inner wall of the filter plate (41). The squeezing block (53) is movably arranged in the squeezing groove (411). Under the action of the elastic element, the top of the squeezing block (53) abuts against the top of the squeezing groove (411), so that the filter plate (41) is kept in a locked state.

5. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 4, characterized in that: When the pump body (1) is working, the liquid is drawn in from the bottom inlet of the pump body (1). The flowing liquid impacts the floating ring (51) and applies an upward force to the floating ring (51). This force is in the same direction as the tension of the elastic element connecting the floating ring (51), and together they keep the top of the extrusion block (53) abutting against the top of the extrusion groove (411).

6. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 4, characterized in that: The self-flushing assembly (6) includes a water guide groove (61) set on the inner wall of the fixed frame (3). A water inlet pipe (62) is connected to the water inlet of the water guide groove (61). The water inlet pipe (62) is symmetrically arranged on the fixed frame (3). A floating plate (54) is set at the bottom of the floating ring (51). The top of the floating plate (54) is fixedly connected to the floating ring (51) through a connecting rod. The water guide groove (61) is set at an angle downward. The water outlet of the water guide groove (61) points to the floating plate (54). A vibration assembly (7) is also set between the floating ring (51) and the fixed frame (3).

7. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 6, characterized in that: When the flushing water is delivered to the water guide channel (61) through the water inlet pipe (62), the flushing water is sprayed downward along the water guide channel (61) onto the floating plate (54), impacting the floating plate (54) and causing the floating ring (51) to move downward against the tension of the elastic element. When the floating ring (51) moves downward, the squeezing block (53) separates from the top of the squeezing groove (411), the filter unit (4) is unlocked, and the flushing water enters the interior of the fixed frame (3) and diffuses from the inside out to impact the filter plate (41), causing the filter plate (41) to float up and down under the constraint of the limiting block (42) and the locking block (43), peeling off the impurities attached to the surface of the filter plate (41).

8. The self-flushing, detachable filter screen permanent magnet submersible pump according to claim 7, characterized in that: When the pressure of the flushing water delivered by the inlet pipe (62) fluctuates, the floating ring (51) moves back and forth under the alternating action of the elastic element and the impact force of the flushing water, causing the filter unit (4) to repeatedly experience the process of locking, unlocking, floating and resetting, forming a pulsed cleaning.

9. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 8, characterized in that: The vibration assembly (7) includes a movable block (71) disposed on a floating ring (51). The inner wall of the fixed frame (3) is provided with a movable groove (34) adapted to the movable block (71). One end of the movable block (71) extends into the movable groove (34). Multiple impact blocks (72) are arranged axially in the movable groove (34). The multiple impact blocks (72) are evenly spaced along the length direction of the movable groove (34). When the floating ring (51) moves up and down, the movable block (71) moves back and forth in the movable groove (34) and collides with the multiple impact blocks (72) in sequence, generating vibration that is transmitted to the fixed frame (3) and the filter unit (4).

10. The self-cleaning, detachable filter screen permanent magnet submersible pump according to claim 9, characterized in that: The floating ring (51) has an installation groove (55) and the movable block (71) is set in the installation groove (55). The installation groove (55) has a rectangular groove. One end of the movable block (71) is movably inserted into the rectangular groove. An elastic element is provided between the movable block (71) and the rectangular groove. The movable block (71) maintains the tendency to extend into the movable groove (34) under the action of the elastic element.

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