Permanent magnet synchronous axial flow flood drainage pump

Abstract

The invention discloses a permanent magnet synchronous axial flow flood drainage pump, which belongs to the technical field of water suction pumps, and comprises a flood drainage pump, two groups of purification components, namely a purification component I and a purification component II, are mounted on a water inlet path of the flood drainage pump, and are the same in structure; a filter cover and an impurity removal assembly are mounted in each of the purification assembly I and the purification assembly II; the diagnosis assembly comprises a flow velocity sensor, and the flow velocity sensor is installed at a liquid inlet of the flood drainage pump. When the filter cover of one purification assembly is blocked, the diagnosis assembly can rapidly detect the blocking condition and automatically close the blocked purification assembly, meanwhile, the other purification assembly is started to continue to work, manual intervention is not needed in the process, and the work efficiency is improved. The working purification assembly drives the impurity removal assembly to clean the non-working purification assembly, self-cleaning is achieved, the blocking degree of the filter cover is reduced, and it is guaranteed that the flood drainage work can be conducted stably.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and more specifically, to a permanent magnet synchronous axial flow drainage pump. Background Art

[0002] A drainage pump, as a type of pump specifically designed for draining water, plays a crucial role during rainfall or floods. Its main function is to quickly and effectively drain accumulated water, thereby preventing various disasters caused by excessive accumulated water. However, during the drainage operation, the water often contains a large amount of impurities, such as small branches, leaves, plastic bags, etc. Once these impurities are sucked into the drainage pump, they can easily jam the impeller inside the pump, resulting in the drainage pump being unable to work properly.

[0003] To solve this problem, in the prior art, a method of installing a filter screen at the water inlet of the drainage pump is usually adopted. The filter screen can effectively block impurities from entering the pump body. However, during the pumping process, these impurities will gradually accumulate on the surface of the filter screen, thereby causing the filter screen to become blocked. Once the filter screen is blocked, the pumping effect of the drainage pump will be greatly reduced, affecting the drainage efficiency.

[0004] To further improve the problem of filter screen blockage, various solutions have been proposed in the prior art. One of them is to install a swinging brush or scraper on the surface of the filter screen. Through the continuous swinging of the brush or scraper, the impurities on the surface of the filter screen can be pushed away, avoiding the filter screen from becoming blocked. However, this method also has certain limitations. The impurities pushed away by the brush or scraper are still likely to flow back to the filter screen along with the water flow, resulting in limited effectiveness.

[0005] In addition to the blockage problem, the damage of the filter screen is another issue that needs attention. The filter screen may be damaged for various reasons (such as aging, corrosion, external impact, etc.) during use. Once the filter screen is damaged, the impurities will flow through the damaged opening and directly enter the pump body, causing damage to the pump body. At the same time, the damaged filter screen also loses its filtering function and cannot effectively block impurities. Worse still, the existing filter screen system often cannot monitor the state of the filter screen in real time and cannot detect and handle the damage of the filter screen in a timely manner. Summary of the Invention

[0006] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a permanent magnet synchronous axial flow drainage pump, which can achieve that when the filter cover of one set of purification components is blocked, the diagnosis component can quickly detect the blockage situation and automatically close the blocked purification components, while opening another set of purification components to continue working. This process does not require manual intervention, enabling the working purification components to drive the impurity removal components to clean the non-working purification components, realizing self-cleaning, reducing the blockage degree of the filter cover, and ensuring the stable progress of the drainage work.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A permanent magnet synchronous axial flow drainage pump includes a drainage pump, and a purification component and a diagnosis component are installed on the water inlet path of the drainage pump. Among them, there are two groups of purification components, namely purification component one and purification component two, and their structures are the same. A filter cover and an impurity removal component are installed in both purification component one and purification component two; The diagnosis component includes a flow velocity sensor, which is installed at the liquid inlet of the drainage pump. A liquid pressure sensor one is installed below the filter cover in the purification component, and a liquid pressure sensor two is installed above the filter cover. By calculating the difference between the detected values of the liquid pressure sensor one and the liquid pressure sensor two reaching a preset threshold, it is determined that the filter cover in the corresponding group of purification components is blocked. At this time, the corresponding blocked purification component is closed, and at the same time, the other group of purification components is opened. At the same time, the impurity removal component is also opened to clean the filter cover in the blocked purification component; A controller is also installed outside the drainage pump. The controller records in real time the difference between the detected values of the liquid pressure sensor one and the liquid pressure sensor two and the corresponding flow velocity value detected by the flow velocity sensor when each group of purification components is opened, and uses them as historical data; when the difference between the detected historical values of the liquid pressure sensor one and the liquid pressure sensor two is different from the corresponding historical flow velocity value; if the difference between the historical values is the same, and the flow velocity value detected by the actual flow velocity sensor is greater than the historical flow velocity value, it is determined that the filter cover is damaged; if the flow velocity value detected by the actual flow velocity sensor is less than the historical flow velocity value, it is determined that there is a leak in the path between the filter cover and the flow velocity sensor.

[0009] Furthermore, both purification component one and purification component two include a purification box. A support plate is installed on the inner wall of the purification box, and the filter cover is installed on the support plate. A solenoid valve one is installed at the upper end of the purification box, and a water guide pipe is installed at the upper end of the solenoid valve one. One end of the water guide pipe away from the solenoid valve one is connected to the water inlet end of the drainage pump. A solenoid valve two is installed at the lower end of the purification box, and one end of the solenoid valve two away from the purification box is connected to a shunt pipe, and one end of the shunt pipe away from the solenoid valve two is connected to a water inlet pipe.

[0010] Furthermore, the impurity removal component includes a diversion pipe. Communication holes are penetrated through the adjacent side walls of the two purification boxes, and the diversion pipe is arranged in the communication holes and extends to the corresponding purification boxes at both left and right ends. An elastic diaphragm is installed on the side wall of the diversion pipe, and the edge position of the elastic diaphragm is fixedly connected to the inner wall of the communication hole. Drainage pipes are connected to both left and right ends of the diversion pipe, and the lower ends of the drainage pipes are connected to the corresponding filter covers. Corrugated sheets are installed at both left and right ends of the diversion pipe and located in the upper part. The support plate is made of an elastic material.

[0011] Further, the impurity removal component further includes a drain hole. The side wall of the drain pipe is provided with an inclined drain hole, the jet port of the drain hole faces the inner wall of the filter cover, and the drain holes are arranged in multiple groups.

[0012] Further, the impurity removal component further includes a paddle wheel. The paddle wheel is fixedly connected to the inner wall of the drain pipe. The upper end of the drain pipe is rotatably connected to the diversion pipe, and the lower end of the drain pipe is rotatably connected to the filter cover.

[0013] Further, both the first liquid pressure sensor and the second liquid pressure sensor are installed on the side wall of the purification tank. The flow rate sensor is installed on the water guide pipe and is installed near the water inlet of the drainage pump.

[0014] Further, a slag discharge port is opened at a position near the inner bottom wall of the rear end face of the purification tank. Slide rail plates are installed on both the left and right sides of the side wall of the purification tank where the slag discharge port is located. A sealing plate is slidably arranged on the slide rail plates, and the sealing plate is used to seal the slag discharge port. An electric telescopic rod is installed on the side wall of the purification tank. The lower end of the electric telescopic rod is fixedly connected with a fixed block. A moving block is arranged inside the fixed block, and one end of the moving block movably penetrates through the fixed block and is fixedly connected to the side surface of the sealing plate.

[0015] Further, a water receiving box is installed at the lower end of the side surface of the purification tank where the slag discharge port is located. A filter screen is installed at the upper opening of the water receiving box, and a return pipe is installed at one end of the water receiving box.

[0016] Further, electromagnets are embedded and installed around the slag discharge port on the side wall of the purification tank, and the sealing plate is made of a magnetically conductive material.

[0017] Further, the inner bottom wall of the purification tank is designed to be inclined and is inclined towards the slag discharge port.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: In this solution, when the filter cover of one group of purification components is blocked, the diagnosis component can quickly detect the blockage situation, automatically close the blocked purification component, and at the same time start another group of purification components to continue working. This process does not require manual intervention. The working purification component drives the impurity removal component to clean the non-working purification component, realizing self-cleaning, reducing the blockage degree of the filter cover, and ensuring the stable progress of the drainage work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is the external view of the overall structure of the present invention; Figure 2 is the display view of the interior of the purification box of the present invention; Figure 3 is the structural schematic diagram of the impurity removal component of the present invention; Figure 4 is the rear view of the overall structure of the present invention; Figure 5 is the structural schematic diagram at the slag discharge port of the present invention; Figure 6 is the structural schematic diagram at the sealing plate of the present invention.

[0021] Explanation of the reference numerals in the figure: 1. Frame body; 2. Drainage pump; 3. Water guide pipe; 4. Water inlet pipe; 5. Water outlet pipe; 6. Purification box; 7. Filter cover; 8. Support plate; 9. Solenoid valve 1; 10. Solenoid valve 2; 11. Shunt pipe; 12. Communication hole; 13. Diversion pipe; 14. Elastic diaphragm; 15. Drainage pipe; 16. Drainage hole; 17. Paddle impeller; 18. Corrugated sheet; 19. Liquid pressure sensor 1; 20. Liquid pressure sensor 2; 21. Flow rate sensor; 22. Controller; 23. Electric telescopic rod; 24. Fixed block; 25. Moving block; 26. Sealing plate; 27. Slag discharge port; 28. Electromagnet; 29. Slide rail plate; 30. Water receiving box; 31. Filter screen; 32. Return pipe. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 6 , a permanent magnet synchronous axial flow drainage pump, including a drainage pump 2, a purification component and a diagnosis component are installed on the water inlet path of the drainage pump 2, wherein there are two groups of purification components, namely purification component 1 and purification component 2, and their structures are the same. A filter cover 7 and an impurity removal component are installed in both purification component 1 and purification component 2; The diagnostic component includes a flow rate sensor 21, which is installed at the liquid inlet of the drainage pump 2. Below the filter cover 7 in the purification component, a first liquid pressure sensor 19 is installed, and above the filter cover 7, a second liquid pressure sensor 20 is installed. By calculating that the difference between the detected values of the first liquid pressure sensor 19 and the second liquid pressure sensor 20 reaches a preset threshold, it is determined that the filter cover 7 in a corresponding set of purification components is blocked. At this time, the corresponding blocked purification component is closed, and at the same time, another purification component is opened. At the same time, the impurity removal component is also opened and the filter cover 7 in the blocked purification component is cleaned; An external controller 22 is also installed on the drainage pump 2. The controller 22 records in real time the difference between the detected values of the first liquid pressure sensor 19 and the second liquid pressure sensor 20 and the corresponding flow rate value detected by the flow rate sensor 21 when each set of purification components is opened, and uses them as historical data; when the difference between the detected historical values of the first liquid pressure sensor 19 and the second liquid pressure sensor 20 is different from the corresponding historical flow rate value; if the difference between the same historical values occurs, and the flow rate value detected by the actual flow rate sensor 21 is greater than the historical flow rate value, it is determined that the filter cover 7 is damaged; if the flow rate value detected by the actual flow rate sensor 21 is less than the historical flow rate value, it is determined that there is a leak in the path between the filter cover 7 and the flow rate sensor 21; Both the first liquid pressure sensor 19 and the second liquid pressure sensor 20 are installed on the side wall of the purification tank 6, and the flow rate sensor 21 is installed on the water guide pipe 3, and the flow rate sensor 21 is installed near the water inlet of the drainage pump 2; Both the first purification component and the second purification component include a purification tank 6. A support plate 8 is installed on the inner wall of the purification tank 6, and the filter cover 7 is installed on the support plate 8. A first solenoid valve 10 is installed at the upper end of the purification tank 6, and a water guide pipe 3 is installed at the upper end of the first solenoid valve 10. One end of the water guide pipe 3 far from the first solenoid valve 10 is connected to the water inlet end of the drainage pump 2. A second solenoid valve 9 is installed at the lower end of the purification tank 6, and one end of the second solenoid valve 9 far from the purification tank 6 is connected to a shunt pipe 11, and one end of the shunt pipe 11 far from the second solenoid valve 9 is connected to a water inlet pipe 4.

[0024] By adopting the above technical solution, the drainage pump 2 and the purification tank 6 are both installed on the frame 1. The frame 1 is made of angle iron or aluminum alloy square tubes. When drainage operation is required, the frame 1 is moved to the pumping location, and then the water inlet pipe 4 is connected to the water extraction pipe. The two can be connected through a flange. The water extraction end of the water extraction pipe is placed in the water source, and then the drainage pump 2 is turned on. Water will enter the water inlet pipe 4 from the water extraction pipe and then enter the shunt pipe 11 from the water inlet pipe 4. At this time, one set of purification components is turned on, and the solenoid valve one 9 and the solenoid valve two 10 in this purification component are successively opened. Then the water in the shunt pipe 11 will flow into the corresponding purification tank 6 through the solenoid valve one 9 and be filtered by the filter cover 7, thereby removing impurities in the water. The filtered water flows out from the upper end of the purification tank 6 and finally flows into the solenoid valve two 10, then flows from the solenoid valve two 10 into the water guide pipe 3, flows from the water guide pipe 3 into the water inlet of the drainage pump 2. An outlet pipe 5 is installed at the water outlet of the drainage pump 2, and finally these filtered waters are discharged from the outlet pipe 5.

[0025] The liquid pressure sensor one 19 is used to detect the pressure inside the liquid at the lower end of the filter cover 7, and the liquid pressure sensor two 20 is used to detect the pressure inside the liquid at the upper end of the filter cover 7. By subtracting the value detected by the liquid pressure sensor two 20 from the value detected by the liquid pressure sensor one 19, the calculated difference is obtained. If the difference reaches the preset threshold, it indicates that the liquid pressure at the lower end of the filter cover 7 is too high, while the liquid pressure at the upper end of the filter cover 7 is very low, indicating that the filter cover 7 is blocked. At this time, the controller 22 controls the solenoid valve one 9 and the solenoid valve two 10 on this purification component to close, and at the same time opens the solenoid valve one 9 and the solenoid valve two 10 on another set of purification components, so that the water flow passes through another set of purification components and is filtered, and then the blocked filter cover 7 is cleaned.

[0026] The flow velocity sensor 21 is used to monitor the water flow velocity in the water conduit 3 in real time. Each time a set of purification components is turned on, the controller 22 will carefully record the change in the difference (i.e., the difference) detected between the liquid pressure sensor one 19 and the liquid pressure sensor two 20 in this set of purification components, as well as the flow velocity value in the water conduit 3 corresponding to this difference. Specifically, for each purification component, two data sets will be established correspondingly: one is the set of differences, which is used to store the pressure differences detected each time; the other is the set of flow velocities, which is used to store the flow velocity values corresponding to each difference. The data in these two sets are in one-to-one correspondence, that is, each difference is associated with a specific flow velocity value. These recorded data are saved as historical data for subsequent analysis and judgment. During the subsequent operation process, when the controller 22 detects that the difference and the flow velocity of a certain set of purification components do not correspond. If there is a situation that matches the historical difference data, but the actual flow velocity detected by the flow velocity sensor 21 is greater than the historical flow velocity value, this indicates that the filter cover 7 may be damaged, because the damaged filter cover 7 will cause the resistance to decrease when the water flows through, thereby increasing the flow velocity.

[0027] On the contrary, if there is historical difference data, but the actual flow velocity detected by the flow velocity sensor 21 is less than the historical flow velocity value, it indicates that there is a leak in the path between the filter cover 7 and the flow velocity sensor 21. The leak will cause some water to flow out from the pipeline path, thereby reducing the water flow through the flow velocity sensor 21 and decreasing the flow velocity. When the diagnostic component determines the corresponding situation, it will issue an alarm, such as triggering the buzzer to sound, and at the same time display the alarm situation on the control panel of the controller 22, which is convenient for the operator to observe and perform subsequent operations.

[0028] As Figures 2 to 3 shown, the impurity removal component includes a diversion pipe 13. Communication holes 12 are penetrated and opened on the adjacent side walls of the two groups of purification tanks 6. The diversion pipe 13 is arranged in the communication holes 12, and the left and right ends respectively extend into the corresponding purification tanks 6. An elastic diaphragm 14 is installed on the side wall of the diversion pipe 13. The edge position of the elastic diaphragm 14 is fixedly connected to the inner wall of the communication hole 12. Drain pipes 15 are connected to both the left and right ends of the diversion pipe 13. The lower ends of the drain pipes 15 are connected to the corresponding filter covers 7. Corrugated sheets 18 are installed at the upper parts of both the left and right ends of the diversion pipe 13. The support plate 8 is made of an elastic material.

[0029] By adopting the above technical solution, when the filter cover 7 in one set of purification components is blocked, another set of purification components can be started. At this time, the water flow will pass through the purification tank 6 in the started purification components. When the water flow passes through the corrugated sheet 18, it will drive the corrugated sheet 18 to vibrate. This vibration will drive the connected diversion pipe 13 to vibrate as well. The vibration of the diversion pipe 13 will be transmitted into the purification tank 6 of the unstarted purification components and will simultaneously cause the corresponding drain pipe 15 in this purification tank 6 to vibrate. The vibration of the drain pipe 15 will drive the blocked filter cover 7 to vibrate. Through the vibration of the filter cover 7, the impurities attached to its lower end face can be quickly shed, thus effectively removing the impurities on the filter cover 7.

[0030] As Figures 2 to 3 shown, the impurity removal component further includes a drain hole 16. The side wall of the drain pipe 15 is provided with an inclined drain hole 16. The ejection port of the drain hole 16 faces the inner wall of the filter cover 7. The drain holes 16 are arranged in multiple groups; The impurity removal component further includes a paddle wheel 17. The inner wall of the drain pipe 15 is fixedly connected with the paddle wheel 17. The upper end of the drain pipe 15 is rotatably connected with the diversion pipe 13, and the lower end of the drain pipe 15 is rotatably connected with the filter cover 7.

[0031] By adopting the above technical solution, when the water flow passes through the purification tank 6 in the started purification components, the water flow will enter the drain pipe 15 through the drain hole 16, then flow along the diversion pipe 13, and finally flow into the drain pipe 15 of the unstarted purification components. Finally, small thin water columns are ejected from the drain holes 16 of this drain pipe 15. After the small thin water columns are ejected, they impact the upper end face of the filter cover 7. By the water flow impacting the mesh holes of the filter cover 7, the clogging removal effect on the filter cover 7 is improved. In addition, when the water flow passes through the drain pipe 15, it will also drive the paddle wheel 17 to rotate. When the paddle wheel 17 rotates, it will drive the drain pipe 15 to rotate. When the drain pipe 15 rotates, it will drive the ejected small thin water columns to rotate. The rotation of the small thin water columns can increase the spraying area of the filter cover 7, so as to facilitate the overall clogging removal of the filter cover 7. Through the alternating use of two sets of purification components in the present invention, the working purification components drive the impurity removal components to clean the unworking purification components, realizing self-cleaning, reducing the clogging degree of the filter cover 7, ensuring stable drainage work, and at the same time extending the service life of the purification components.

[0032] As Figures 4 to 6As shown, a slag discharge port 27 is opened at a position on the rear end face of the purification box 6 close to the inner bottom wall. Slide rail plates 29 are installed on both the left and right sides of the side wall of the purification box 6 where the slag discharge port 27 is located. A sealing plate 26 is slidably arranged on the slide rail plates 29, and the sealing plate 26 is used to close the slag discharge port 27. An electric telescopic rod 23 is installed on the side wall of the purification box 6. The lower end of the electric telescopic rod 23 is fixedly connected with a fixed block 24. A moving block 25 is arranged inside the fixed block 24. One end of the moving block 25 movably penetrates through the fixed block 24 and is fixedly connected with the side surface of the sealing plate 26. The inner bottom wall of the purification box 6 is designed to be inclined and inclined towards the slag discharge port 27.

[0033] By adopting the above technical solution, after the purification component is closed, the contraction of the electric telescopic rod 23 will drive the sealing plate 26 to rise and open the slag discharge port 27 at the same time. After the purification component is opened, the electric telescopic rod 23 extends to drive the sealing plate 26 to descend and close the slag discharge port 27. When the filter cover 7 shakes and is impacted by water flow, the impurities adhered to the filter cover 7 will fall off. The impurities will fall onto the inner bottom wall of the purification box 6. Because the inner bottom wall is designed to be inclined and inclined towards the slag discharge port 27, this can facilitate the impurities to slide out from the slag discharge port 27 along the slope. In addition, because there is continuous water flow flowing down from the filter cover 7, these water flows flow onto the inner bottom wall of the purification box 6 and flow along the slope, and at the same time, it is also convenient to carry away the impurities on the slope, improving the slag discharge effect inside the purification box 6.

[0034] As Figures 4 to 6 shown, a water receiving box 30 is installed at the lower end of the side surface of the purification box 6 where the slag discharge port 27 is located. A filter net 31 is installed at the upper end opening of the water receiving box 30. A return pipe 32 is installed at one end of the water receiving box 30.

[0035] By adopting the above technical solution, when the impurities and water flow are discharged from the slag discharge port 27, they will pass through the filter net 31. The water flow passes through the filter net 31 and flows into the water receiving box 30, and then flows into the return pipe 32 and is discharged from the return pipe 32.

[0036] As Figures 4 to 6 shown, electromagnets 28 are embedded and installed around the slag discharge port 27 on the side wall of the purification box 6. The sealing plate 26 is made of a magnetic conductive material.

[0037] By adopting the above technical solution, after the slag discharge port 27 is closed, the electromagnets 28 are turned on. The electromagnets 28 will magnetically attract the sealing plate 26, thereby realizing a tight seal of the slag discharge port 27 and preventing water flow from being discharged from the slag discharge port 27. In addition, a silica gel pad is connected to the side of the sealing plate 26 adjacent to the slag discharge port 27. In this way, when the electromagnets 28 magnetically attract the sealing plate 26, the silica gel pad on the sealing plate 26 tightly presses against the edge of the slag discharge port 27, which can improve the sealing effect on the slag discharge port 27.

[0038] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A permanent magnet synchronous axial flow drainage pump, comprising a drainage pump (2), characterized in that: A purification component and a diagnostic component are installed on the water inlet path of the drainage pump (2), wherein the purification components are divided into two groups, namely purification component one and purification component two, and the two groups have the same structure, and the purification component one and purification component two are both installed with a filter cover (7) and a debris removal component; The diagnostic component comprises a flow rate sensor (21), the flow rate sensor (21) being installed at the liquid inlet of the drainage pump (2), a liquid pressure sensor 1 (19) being installed below the filter cover (7) in the purification component, and a liquid pressure sensor 2 (20) being installed above the filter cover (7), and by calculating that the difference between the values ​​detected by the liquid pressure sensor 1 (19) and the liquid pressure sensor 2 (20) reaches a preset threshold value, it is determined that the filter cover (7) in the corresponding group of purification components is clogged, and at this time, the corresponding clogged purification component is closed, and the other purification component is opened at the same time, and the impurity removal component is also opened at the same time to clean the filter cover (7) in the clogged purification component; A controller (22) is also installed outside the drainage pump (2). The controller (22) records in real time the difference between the values ​​detected by the liquid pressure sensor 1 (19) and the liquid pressure sensor 2 (20) and the corresponding flow rate value detected by the flow rate sensor (21) when each group of purification components is opened, and uses them as historical data; when the difference between the historical values ​​detected by the liquid pressure sensor 1 (19) and the liquid pressure sensor 2 (20) is different from the corresponding historical flow rate value; if the difference between the historical values ​​is the same, and the flow rate value detected by the actual flow rate sensor (21) is greater than the historical flow rate value, it is judged that the filter cover (7) is damaged; if the flow rate value detected by the actual flow rate sensor (21) is less than the historical flow rate value, it is judged that a leak occurs on the path between the filter cover (7) and the flow rate sensor (21).

2. A permanent magnet synchronous axial flow drainage pump according to claim 1, characterized in that: Purification component 1 and purification component 2 both include a purification box (6), the inner wall of the purification box (6) is mounted with a support plate (8), the filter cover (7) is mounted on the support plate (8), the upper end of the purification box (6) is mounted with a solenoid valve 1 (10), the upper end of the solenoid valve 1 (10) is mounted with a water guide pipe (3), one end of the water guide pipe (3) away from the end of the solenoid valve 1 (10) is connected to the water inlet end of the drainage pump (2), the lower end of the purification box (6) is mounted with a solenoid valve 2 (9), the end of the solenoid valve 2 (9) away from the purification box (6) is connected with a shunt pipe (11), and the end of the shunt pipe (11) away from the solenoid valve 2 (9) is connected to the water inlet pipe (4).

3. A permanent magnet synchronous axial flow drainage pump according to claim 2, characterized in that: The impurity removal component comprises a flow guide pipe (13). A communication hole (12) is formed through the adjacent side walls of the two groups of purification boxes (6). The flow guide pipe (13) is arranged in the communication hole (12), and the left and right ends respectively extend into the corresponding purification boxes (6). An elastic diaphragm (14) is installed on the side wall of the flow guide pipe (13). The edge of the elastic diaphragm (14) is fixedly connected to the inner wall of the communication hole (12). The left and right ends of the flow guide pipe (13) are connected to a drainage pipe (15). The lower end of the drainage pipe (15) is connected to the corresponding filter cover (7). The left and right ends of the flow guide pipe (13) and the upper part are both installed with corrugated sheets (18). The support plate (8) is made of elastic material.

4. A permanent magnet synchronous axial flow drainage pump according to claim 3, characterized in that: The impurity removal component further comprises drainage holes (16). The drainage pipe (15) is provided with oblique drainage holes (16) extending through the side wall thereof. The spray ports of the drainage holes (16) face the inner wall of the filter cover (7). The drainage holes (16) are provided in a plurality of groups.

5. A permanent magnet synchronous axial flow drainage pump according to claim 4, characterized in that: The impurity removal component also includes a paddle wheel (17), the inner wall of the drainage pipe (15) is fixedly connected to the paddle wheel (17), the upper end of the drainage pipe (15) is rotatably connected to the guide pipe (13), and the lower end of the drainage pipe (15) is rotatably connected to the filter cover (7).

6. A permanent magnet synchronous axial flow drainage pump according to claim 5, characterized in that: Liquid pressure sensor 1 (19) and liquid pressure sensor 2 (20) are both mounted on the side wall of the purification box (6), and the flow rate sensor (21) is mounted on the water pipe (3), and the flow rate sensor (21) is mounted near the water inlet of the drainage pump (2).

7. A permanent magnet synchronous axial flow drainage pump according to claim 6, characterized in that: A slag discharge port (27) is provided at a position near the inner bottom wall on the rear end surface of the purification box (6); slide rail plates (29) are installed on the side walls of the purification box (6) at the left and right sides of the slag discharge port (27); a sealing plate (26) is slidably provided on the slide rail plate (29); the sealing plate (26) is used to close the slag discharge port (27); an electric telescopic rod (23) is installed on the side wall of the purification box (6); a fixed block (24) is fixedly connected to the lower end of the electric telescopic rod (23); a moving block (25) is provided inside the fixed block (24); one end of the moving block (25) movably passes through the fixed block (24) and is fixedly connected to the side surface of the sealing plate (26).

8. A permanent magnet synchronous axial flow drainage pump according to claim 7, characterized in that: A water receiving box (30) is installed on the side surface of the purification box (6) at the lower end of the slag discharge port (27), a filter screen (31) is installed at the upper opening of the water receiving box (30), and a return pipe (32) is installed at one end of the water receiving box (30).

9. A permanent magnet synchronous axial flow drainage pump according to claim 8, characterized in that: An electromagnet (28) is embedded and installed on the side wall of the purification box (6) around the slag discharge port (27), and the sealing plate (26) is made of magnetic conductive material.

10. A permanent magnet synchronous axial flow drainage pump according to claim 8, characterized in that: The inner bottom wall of the purification box (6) is designed to be inclined, and is inclined toward the slag discharge port (27).

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