Centrifugal pump with filtering function

Abstract

The application relates to the technical field of centrifugal pump equipment, and discloses a centrifugal pump with a filtering function, which comprises a fixing base, a pump body assembly is installed on the fixing base, an inlet pipe is arranged at the input end of the pump body assembly, an outlet pipe is arranged at the output end of the pump body assembly, a liquid inlet bin mechanism is further arranged between the inlet pipe and the pump body assembly, a main filter layer is movably installed at the front side of the liquid inlet bin mechanism, a secondary filter layer is fixedly installed at the rear side of the liquid inlet bin mechanism, a backflush bin mechanism is further arranged at the outer side of the liquid inlet bin mechanism, a driving mechanism is installed at the outer side of the backflush bin mechanism, the main filter layer moves to the rear side in the liquid inlet bin mechanism after being blocked under pressure and is engaged with the driving mechanism, the driving mechanism drives the main filter layer engaged therewith to enter the backflush bin mechanism to perform backflushing, in the above way, the filter plate blocked can be backflushed in time and conveniently, and the influence of energy consumption increase caused by long-term blockage of the filter plate of the centrifugal pump can be avoided.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump equipment technology, and more specifically to a centrifugal pump with a filtration function. Background Technology

[0002] The function of a centrifugal pump is to convert the mechanical energy of a prime mover into the kinetic and pressure energy of the liquid being transported through centrifugal force, thereby realizing the transportation, lifting or pressurization of the liquid. Due to its advantages such as simple structure, uniform flow, and easy maintenance, the centrifugal pump is the most widely used type of pump in the world today.

[0003] In the actual use of existing centrifugal pumps, a filter screen is installed at the pump inlet to intercept and filter impurity particles carried by the liquid flowing into the pump body. If these impurities directly enter the pump body, they will wear against the inner wall of the pump casing and the impeller, thereby affecting the performance and service life of the centrifugal pump.

[0004] However, when using centrifugal pumps in the current technology, the filter screen installed on it will become clogged with impurities and particles over a long period of use. In order not to affect the performance of the centrifugal pump, the filter screen of the centrifugal pump needs to be cleaned in a timely manner. However, the centrifugal pumps in the current technology require the filter screen to be disassembled for cleaning, which is not convenient.

[0005] Secondly, a clogged filter significantly increases the local resistance of the pipeline. To achieve the same flow rate, a higher head is needed to overcome this increased resistance. If a clogged filter is used for a long time, it will greatly increase the energy consumed by the prime mover, and the operation of the equipment will not be safe.

[0006] Therefore, in order to solve the above problems, it is necessary to provide a centrifugal pump with a filtration function. Summary of the Invention

[0007] In order to overcome the above-mentioned defects of the prior art, the present invention provides a centrifugal pump with a filtration function to solve the problems existing in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a centrifugal pump with a filtration function, including a fixed base, on which a pump body assembly is mounted. The pump body assembly has an inlet pipe at its input end and an outlet pipe at its output end. An inlet chamber mechanism is also provided between the inlet pipe and the pump body assembly. A main filter layer is movably mounted on the front side of the inlet chamber mechanism, and a secondary filter layer is fixedly mounted on the rear side of the inlet chamber mechanism. A backwash chamber mechanism is also provided on the outside of the inlet chamber mechanism, and a drive mechanism is mounted on the outside of the backwash chamber mechanism. When the main filter layer is blocked and pressurized, it moves rearward in the inlet chamber mechanism and engages with the drive mechanism. The drive mechanism drives the main filter layer engaged with it to enter the backwash chamber mechanism for backwashing.

[0009] Furthermore, the pump body assembly includes a shaft housing component, which is fixedly mounted on a fixed base. Bearings are installed at both the front and rear ends of the shaft housing component. A pump shaft is sleeved on the bearings installed on the shaft housing component. An impeller is fixedly sleeved on the front end of the pump shaft. A pump casing is provided on the outer side of the impeller. A port is opened at the front end of the pump casing. A sealing ring is installed on the rear side of the pump casing. The sealing ring is movably sleeved with the pump shaft. An outer shell is fixedly mounted on the outer side of the pump casing. The rear side of the outer shell is connected to the shaft housing component. A motor is connected to the rear end of the pump shaft. The liquid outlet pipe is connected to the pump casing along the tangent direction of the inner wall curved surface of the pump casing. The liquid outlet pipe communicates with the internal space of the pump casing.

[0010] Furthermore, the liquid inlet mechanism includes a channel component, which is fixedly connected to the port. An inner channel is formed inside the rear side of the channel component, and an outer channel is formed inside the front side of the channel component. A middle slide rail is formed at the middle position of the upper and lower ends of the inner wall of the outer channel. A through groove is formed at the rear end of the middle slide rail. An inner hole is formed at each of the four corners of the inner wall of the inner channel. A pressure sensor is provided at the bottom of the inner hole. A pressure shaft is movably sleeved in the inner hole. A contact block is provided at the rear end of the pressure shaft. An outer spring is connected between the rear end of the pressure shaft and the end of the inner hole. A side slide rail aligned with the pressure shaft is formed at each of the four corners of the inner wall of the outer channel.

[0011] Furthermore, the inlet pipe is fixedly connected to the front end of the outer chamber channel. The main filter layer includes two filter plates, which are symmetrically distributed vertically. Each filter plate has a groove at its outer end, which is movably fitted into the middle slide rail. Each adjacent end of the upper and lower parts of the filter plate has a magnetic strip, which magnetically attracts each other when in contact. Each filter plate also has a sliding lug at both ends, with a vertical groove on the edge of the sliding lug. The sliding lug is movably fitted into the side slide rail. The front end of the pressure shaft abuts against the sliding lug of the filter plate and can slide on the vertical groove. The secondary filter layer is fixedly installed at the front end of the inner chamber channel. When the filter plate moves backward and aligns with the through groove, the contact block squeezes and triggers the pressure sensor.

[0012] Furthermore, an inner spring is fixedly connected to the end of the inner hole, the front end of the inner spring is fixedly connected to the contact block, the outer side of the contact block is provided with a flange, the rear end of the pressure shaft is provided with a storage hole, the storage hole is aligned with the contact block and stores it, the inner wall of the storage hole is provided with an elastic ring, and the front and rear ends of the outer spring are fixedly connected to the pressure shaft and the end of the inner hole, respectively.

[0013] Furthermore, the backflushing chamber mechanism includes two backflushing chamber channels, which are respectively installed at the upper and lower ends of the chamber channel component. The inner side of each backflushing chamber channel has a receiving groove aligned with the through groove. The outlet end of each backflushing chamber channel is connected to a front connecting pipe, which is connected to a drain pipe. A water pressure sensor is installed on the inner wall of the drain pipe. A backflushing pipe is installed on the rear side of the backflushing chamber channel. The inlet end of the backflushing pipe is connected to a rear connecting pipe, which is connected to a branch pipe. An outer pipe is connected to the bottom of the pump housing along the tangent direction of its inner wall curvature. A piston is movably sleeved in the outer pipe. A mounting base is fixedly installed on the upper end of the pump housing. A first electric cylinder is fixedly installed on the upper end of the mounting base. The end of the drive shaft of the first electric cylinder is fixedly connected to the piston. The bottom end of the outer pipe is fixedly connected to the branch pipe.

[0014] Furthermore, the drive mechanism includes a mounting bracket, which is fixedly installed on the outside of the backflushing chamber. A second electric cylinder is fixedly installed on the outer end of the mounting bracket. The drive end of the second electric cylinder passes through the backflushing chamber and is connected to a movable shaft. A groove block is fixedly installed on the bottom end of the movable shaft. A sealing strip is also fixedly installed on the shaft body of the movable shaft. When the sealing strip closes the through groove, the groove block is located in the through groove and aligned with the groove ear. The groove block and the groove ear are both provided with mutually compatible grooves.

[0015] Furthermore, the pressure sensor is electrically connected to the second electric cylinder and the first electric cylinder, and sends a contraction signal to drive the second electric cylinder and the first electric cylinder to contract. The water pressure sensor is electrically connected to the second electric cylinder and the first electric cylinder, and sends an extension signal to drive the second electric cylinder and the first electric cylinder to extend.

[0016] The technical effects and advantages of this invention are as follows:

[0017] In operation, the liquid enters the outer chamber through the inlet pipe and then flows into the pump casing through the inner chamber, exiting through the outlet pipe. Impurities carried in the liquid are filtered by the filter plates. However, the filter plates are prone to clogging during prolonged filtration. When clogged, the pressure on the filter plates increases, pushing them backward and simultaneously driving the pressure shaft backward. When the filter plate reaches the through groove, the groove lug engages with the groove block, and the contact block compresses and triggers the pressure sensor. The pressure sensor sends a contraction signal, causing the first and second electric cylinders to contract. The second electric cylinder drives the groove block, moving the filter plate into the backwash chamber, separating the upper and lower filter plates, and the groove block and sealing strip are then stored. In the receiving tank, the first electric cylinder simultaneously drives the piston upward, opening the outer pipe. Some liquid in the pump casing is discharged from the outer pipe and then from the backwash pipe through the branch pipe, thus backwashing the filter plate located in the backwash chamber. The flushing liquid is discharged through the backwash chamber and from the drain pipe. After the water pressure sensor is pressurized, it sends an extension signal to drive the second and first electric cylinders to extend, thereby resetting the filter plate and piston respectively. During the backwashing process of the filter plate, the auxiliary filter layer replaces the filter plate to perform the filtration work. In this way, the clogged filter plate can be backwashed in a timely and convenient manner, and the energy consumption of the centrifugal pump caused by long-term filter plate clogging can be avoided. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic cross-sectional view of the pump body assembly of the present invention;

[0020] Figure 3 This is a schematic cross-sectional view of the storage passage component of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the side slide rail of the present invention;

[0022] Figure 5 This is a schematic diagram of the vertical groove structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure at the inner hole of the present invention;

[0024] Figure 7 This is a schematic cross-sectional view of the drive mechanism of the present invention;

[0025] Figure 8 This is a schematic cross-sectional view of the backflushing chamber mechanism of the present invention;

[0026] Figure 9 This is a schematic cross-sectional view of the piston structure of the present invention.

[0027] The attached figures are labeled as follows: 1. Fixed base; 2. Pump body assembly; 201. Shaft housing; 202. Pump shaft; 203. Impeller; 204. Pump casing; 205. Port; 206. Sealing ring; 207. Outer casing; 208. Motor; 3. Inlet pipe; 4. Outlet pipe; 5. Inlet chamber mechanism; 501. Chamber passage component; 502. Inner chamber passage; 503. Outer chamber passage; 504. Middle slide rail; 505. Through groove; 506. Inner hole; 507. Pressure sensor; 508. Pressure shaft; 509. Contact block; 510. Outer spring; 511. Side slide rail; 512. Inner spring; 513. Flange protrusion; 514. Receiving... 515. Filter ring; 6. Main filter layer; 601. Filter plate; 602. Groove ear; 603. Magnetic strip; 604. Vertical groove; 7. Secondary filter layer; 8. Backwash chamber mechanism; 801. Backwash chamber channel; 802. Collection groove; 803. Front connecting pipe; 804. Drain pipe; 805. Water pressure sensor; 806. Backwash pipe; 807. Rear connecting pipe; 808. Branch pipe; 809. Outer pipe; 810. Piston; 811. Mounting base; 812. First electric cylinder; 9. Drive mechanism; 901. Mounting bracket; 902. Second electric cylinder; 903. Movable shaft; 904. Groove block; 905. Sealing strip. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The centrifugal pump with filtration function involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Reference Figure 1 The present invention provides a centrifugal pump with filtration function, including a fixed base 1, a pump body assembly 2 fixedly installed on the fixed base 1, an inlet pipe 3 installed at the input end of the pump body assembly 2, an outlet pipe 4 installed at the output end of the pump body assembly 2, an inlet chamber mechanism 5 provided between the pump body assembly 2 and the inlet pipe 3, a main filter layer 6 movably installed on the front side of the inlet chamber mechanism 5, a secondary filter layer 7 fixedly installed on the rear side of the inlet chamber mechanism 5, a backwash chamber mechanism 8 installed on the outside of the inlet chamber mechanism 5, and a drive mechanism 9 installed on the outside of the backwash chamber mechanism 8.

[0030] When the device is in use, the pump body assembly 2 is fixedly installed on the fixed base 1. After the pump body assembly 2 is started, the liquid can enter the pump body assembly 2 through the inlet pipe 3 and be discharged outward from the outlet pipe 4, thereby realizing its function of driving and transporting liquid.

[0031] Impurities carried in the liquid are intercepted and filtered by the main filter layer 6. When the main filter layer 6 is blocked, it is pressed and moves backward in the liquid inlet chamber mechanism 5, thereby engaging with the drive end of the drive mechanism 9. The drive mechanism 9 can drive the main filter layer 6 to the backwash channel of the backwash chamber mechanism 8 for backwashing. During the process of the main filter layer 6 entering the backwash channel of the backwash chamber mechanism 8, the secondary filter layer 7 provides filtration for the liquid entering the pump body assembly 2. After the main filter layer 6 is backwashed, the drive mechanism 9 drives the main filter layer 6 to reset and resume filtration.

[0032] It should be noted that the fluid passing through the secondary filter layer 7 is the same fluid that has been filtered by the main filter layer 6, and the secondary filter layer 7 only performs the filtration work when the main filter layer 6 enters the backwash channel of the backwash chamber mechanism 8. Therefore, the service life of the secondary filter layer 7 is greatly extended.

[0033] Reference Figure 2 The pump body assembly 2 includes a shaft housing 201, which is fixedly mounted on a fixed base 1. Bearings are installed at both the front and rear ends of the shaft housing 201. The bearings mounted on the shaft housing 201 are sleeved with a pump shaft 202. An impeller 203 is fixedly sleeved at the front end of the pump shaft 202. A pump housing 204 is provided on the outside of the impeller 203. A port 205 is opened at the front end of the pump housing 204. A sealing ring 206 is installed on the rear side of the pump housing 204. The sealing ring 206 is movably sleeved with the shaft of the pump shaft 202. An outer shell 207 is fixedly mounted on the outside of the pump housing 204. The rear side of the outer shell 207 is connected to the shaft housing 201. A motor 208 is connected to the rear end of the pump shaft 202. The outlet pipe 4 is connected to the pump housing 204 along the tangent direction of the inner wall curved surface of the pump housing 204. The outlet pipe 4 communicates with the internal space of the pump housing 204.

[0034] When the device is in use, the motor 208 drives the pump shaft 202 to rotate, which in turn drives the impeller 203 to rotate. The liquid enters from the port 205 and is discharged from the outlet pipe 4 under the centrifugal action of the rotating impeller 203.

[0035] Reference Figures 3-5 The liquid inlet mechanism 5 includes a channel component 501, which is fixedly connected to the port 205. An inner channel 502 is provided inside the rear side of the channel component 501, and an outer channel 503 is provided inside the front side of the channel component 501. A middle slide rail 504 is provided at the middle position of the upper and lower ends of the inner wall of the outer channel 503. A through groove 505 is provided at the rear end of the middle slide rail 504. An inner hole 506 is provided at the four corners of the inner wall of the inner channel 502. A pressure sensor 507 is provided at the bottom of the inner hole 506. A pressure shaft 508 is movably sleeved in the inner hole 506. A contact block 509 is provided at the rear end of the pressure shaft 508. An outer spring 510 is connected between the rear end of the pressure shaft 508 and the end of the inner hole 506. A side slide rail 511 aligned with the pressure shaft 508 is provided at the four corners of the inner wall of the outer channel 503.

[0036] The inlet pipe 3 is fixedly connected to the front end of the outer chamber channel 503. The main filter layer 6 includes two filter plates 601, which are symmetrically distributed vertically. The outer ends of the filter plates 601 are provided with grooves 602, which are movably sleeved in the middle slide rail 504. The upper and lower adjacent ends of the filter plates 601 are provided with magnetic strips 603. When the magnetic strips 603 come into contact with each other, they are magnetically attracted. The two ends of the filter plates 601 are also provided with sliding ears. The sliding ears of the filter plates 601 are provided with vertical grooves 604. The sliding ears of the filter plates 601 are movably sleeved in the side slide rails 511. The front end of the pressure shaft 508 abuts against the sliding ears of the filter plates 601 and can slide on the vertical grooves 604. The secondary filter layer 7 is fixedly installed at the front end of the inner chamber channel 502. When the filter plates 601 move backward and align with the through groove 505, the contact block 509 squeezes and triggers the pressure sensor 507.

[0037] Reference Figure 6 An inner spring 512 is fixedly connected to the end of the inner hole 506. The front end of the inner spring 512 is fixedly connected to the contact block 509. The outer side of the contact block 509 is provided with a flange protrusion 513. The rear end of the pressure shaft 508 is provided with a storage hole 514. The storage hole 514 is aligned with the contact block 509 and stores it. An elastic ring 515 is provided on the inner wall of the storage hole 514. The front and rear ends of the outer spring 510 are fixedly connected to the pressure shaft 508 and the end of the inner hole 506, respectively.

[0038] In this embodiment, when the pressure shaft 508 moves rearward and compresses the outer spring 510, the contact block 509 engages with the receiving hole 514. Under the limiting action of the elastic ring 515, the contact block 509 is driven to move rearward and compress the inner spring 512. When the contact block 509 squeezes and triggers the pressure sensor 507, the contact block 509 will break through the restriction of the elastic ring 515 and completely enter the receiving hole 514 under the action of the inner spring 512. When the outer spring 510 drives the pressure shaft 508 to reset, the contact block 509 is pulled out of the receiving hole 514 under the action of the inner spring 512. The above method can immediately separate the contact block 509 from the pressure sensor 507 after it squeezes and triggers the pressure sensor 507, avoiding the pressure sensor 507 from being continuously triggered to emit electrical signals.

[0039] Reference Figures 7-9The backflushing chamber mechanism 8 includes two backflushing chamber channels 801, which are respectively installed at the upper and lower ends of the chamber channel component 501. The inner side of each backflushing chamber channel 801 has a receiving groove 802 aligned with the through groove 505. The outlet end of each backflushing chamber channel 801 is connected to a front connecting pipe 803, which is connected to a drain pipe 804. A water pressure sensor 805 is installed on the inner wall of the drain pipe 804. A backflushing pipe 806 is installed at the rear of each backflushing chamber channel 801. The inlet end of 06 is connected to a rear connecting pipe 807, the rear connecting pipe 807 is connected to a branch pipe 808, the bottom of the pump housing 204 is connected to an outer pipe 809 along the tangent of its inner wall curved surface, a piston 810 is movably sleeved in the outer pipe 809, a mounting base 811 is fixedly installed at the upper end of the pump housing 204, a first electric cylinder 812 is fixedly installed at the upper end of the mounting base 811, the end of the drive shaft of the first electric cylinder 812 is fixedly connected to the piston 810, and the bottom end of the outer pipe 809 is fixedly connected to the branch pipe 808.

[0040] The drive mechanism 9 includes a mounting bracket 901, which is fixedly installed on the outside of the backflushing chamber 801. A second electric cylinder 902 is fixedly installed on the outer end of the mounting bracket 901. The drive end of the second electric cylinder 902 passes through the backflushing chamber 801 and is connected to a movable shaft 903. A groove block 904 is fixedly installed on the bottom end of the movable shaft 903. A sealing strip 905 is also fixedly installed on the shaft of the movable shaft 903. When the sealing strip 905 closes the through groove 505, the groove block 904 is located in the through groove 505 and is aligned with the groove ear 602.

[0041] Depend on Figure 7 It is known that grooves that are compatible with each other are provided on the groove block 904 and the groove ear 602. When the groove block 904 and the groove ear 602 are engaged, the groove block 904 can drive the groove ear 602 to overcome the adsorption between the two filter plates and separate the two filter plates.

[0042] Pressure sensor 507 is electrically connected to the second electric cylinder 902 and the first electric cylinder 812, and sends a contraction signal to drive the second electric cylinder 902 and the first electric cylinder 812 to contract. Water pressure sensor 805 is electrically connected to the second electric cylinder 902 and the first electric cylinder 812, and sends an extension signal to drive the second electric cylinder 902 and the first electric cylinder 812 to extend.

[0043] When the device is in use, liquid enters the outer chamber 503 through the inlet pipe 3 and then enters the pump housing 204 through the inner chamber 502, and is discharged from the outlet pipe 4. Impurities carried in the liquid are intercepted and filtered by the filter plate 601. The filter plate 601 is prone to clogging during long-term filtration. When the filter plate 601 is clogged, the pressure on the filter plate 601 increases, thus pushing it to move backward, and simultaneously driving the pressure shaft 508 to move backward. When the filter plate 601 moves to the through groove 505, the groove ear 602 engages with the groove block 904, the contact block 509 squeezes and triggers the pressure sensor 507, and the pressure sensor 507 sends a contraction signal to drive the second electric cylinder 902 and the first electric cylinder 812 to contract. The second electric cylinder 902 drives the groove block 904 to move the filter plate 601 into the backwash chamber 801, the upper and lower filter plates 601 separate, and the groove block 904 and the sealing strip... 905 is stored in the storage tank 802. At the same time, the first electric cylinder 812 drives the piston 810 to move upward, causing the outer pipe 809 to open. Some of the liquid in the pump housing 204 is discharged from the outer pipe 809 and discharged from the backwash pipe 806 through the branch pipe 808, thereby backwashing the filter plate 601 located in the backwash chamber 801. The flushing liquid is discharged through the backwash chamber 801 and from the drain pipe 804. After being pressed, the water pressure sensor 805 sends an extension signal to drive the second electric cylinder 902 and the first electric cylinder 812 to extend, thereby resetting the filter plate 601 and the piston 810 respectively. During the backwashing process of the filter plate 601, the auxiliary filter layer 7 replaces the filter plate 601 to perform the filtration work. In this way, the clogged filter plate 601 can be backwashed in a timely and convenient manner, and the energy consumption of the centrifugal pump caused by the long-term clogging of the filter plate 601 can be avoided.

[0044] It should be noted that, in actual use, the signal from the water pressure sensor 805 can be delayed, thereby extending the backwashing time for the filter plate 601 and making it more thoroughly rinsed.

[0045] The working principle of this invention is as follows: During use, liquid enters the outer chamber 503 through the inlet pipe 3 and then enters the pump housing 204 through the inner chamber 502, exiting through the outlet pipe 4. Impurities carried in the liquid are intercepted and filtered by the filter plate 601. The filter plate 601 is prone to clogging during long-term filtration. When the filter plate 601 is clogged, the pressure on it increases, causing it to move backward and simultaneously driving the pressure shaft 508 backward. When the filter plate 601 reaches the through groove 505, the groove ear 602 engages with the groove block 904. The contact block 509 squeezes and triggers the pressure sensor 507. The pressure sensor 507 sends a contraction signal, causing the second electric cylinder 902 and the first electric cylinder 812 to contract. The second electric cylinder 902 drives the groove block 904, moving the filter plate 601 into the backflushing chamber 801. The upper and lower filter plates 601 separate, and the groove block 90... 4. The sealing strip 905 is stored in the storage groove 802. At the same time, the first electric cylinder 812 drives the piston 810 to move upward, so that the outer pipe 809 is opened. Some of the liquid in the pump housing 204 is discharged from the outer pipe 809 and discharged from the backwash pipe 806 through the branch pipe 808, thereby backwashing the filter plate 601 located in the backwash chamber 801. The flushing liquid is discharged through the backwash chamber 801 and from the drain pipe 804. After the water pressure sensor 805 is pressurized, it sends an extension signal to drive the second electric cylinder 902 and the first electric cylinder 812 to extend, thereby resetting the filter plate 601 and the piston 810 respectively. During the backwashing process of the filter plate 601, the auxiliary filter layer 7 replaces the filter plate 601 to perform the filtration work. In this way, the clogged filter plate 601 can be backwashed in a timely and convenient manner, and the energy consumption of the centrifugal pump caused by the long-term clogging of the filter plate 601 can be avoided.

[0046] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0047] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0048] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A centrifugal pump with a filtration function, comprising a fixed base (1), on which a pump body assembly (2) is mounted, wherein the input end of the pump body assembly (2) is provided with an inlet pipe (3), and the output end of the pump body assembly (2) is provided with an outlet pipe (4), characterized in that: A liquid inlet chamber mechanism (5) is also provided between the liquid inlet pipe (3) and the pump body assembly (2). A main filter layer (6) is movably installed on the front side of the liquid inlet chamber mechanism (5), and a secondary filter layer (7) is fixedly installed on the rear side of the liquid inlet chamber mechanism (5). A backflushing chamber mechanism (8) is also provided on the outside of the liquid inlet chamber mechanism (5), and a drive mechanism (9) is installed on the outside of the backflushing chamber mechanism (8). After being blocked and pressurized, the main filter layer (6) moves backward in the liquid inlet mechanism (5) and engages with the drive mechanism (9); The drive mechanism (9) drives the main filter layer (6) connected to it to enter the backwash chamber mechanism (8) for backwashing; The liquid inlet mechanism (5) includes a channel component (501). An inner channel (502) is formed inside the rear side of the channel component (501), and an outer channel (503) is formed inside the front side of the channel component (501). A middle slide rail (504) is formed at the middle position of both the upper and lower ends of the inner wall of the outer channel (503). A through groove (505) is formed at the rear end of each middle slide rail (504). A through groove (505) is formed at each of the four corners of the inner wall of the inner channel (502). An inner hole (506) is provided, and a pressure sensor (507) is provided at the bottom end of the inner hole (506). A pressure shaft (508) is movably sleeved in the inner hole (506). A contact block (509) is provided at the rear end of the pressure shaft (508). An outer spring (510) is connected between the rear end of the pressure shaft (508) and the end of the inner hole (506). Side slide rails (511) aligned with the pressure shaft (508) are provided at the four corners of the inner wall of the outer compartment (503). The inlet pipe (3) is fixedly connected to the front end of the outer chamber channel (503). The main filter layer (6) includes filter plates (601). There are two filter plates (601) and they are symmetrically distributed vertically. The outer ends of the filter plates (601) are provided with lugs (602). The lugs (602) are movably sleeved in the middle slide rail (504). The upper and lower adjacent ends of the filter plates (601) are provided with magnetic strips (603). When the magnetic strips (603) come into contact with each other, they are magnetically attracted. The two ends of the filter plates (601) are magnetically attracted. The filter plate (601) is also provided with a sliding lug. The sliding lug of the filter plate (601) is provided with a vertical groove (604). The sliding lug of the filter plate (601) is movably sleeved in the side slide rail (511). The front end of the pressure shaft (508) abuts against the sliding lug of the filter plate (601) and can slide on the vertical groove (604). The secondary filter layer (7) is fixedly installed at the front end of the inner chamber channel (502). When the filter plate (601) moves backward and aligns with the through groove (505), the contact block (509) squeezes and triggers the pressure sensor (507). An inner spring (512) is fixedly connected to the end of the inner hole (506). The front end of the inner spring (512) is fixedly connected to the contact block (509). The outer side of the contact block (509) is provided with a flange protrusion (513). The rear end of the pressure shaft (508) is provided with a storage hole (514). The storage hole (514) is aligned with the contact block (509) and stores it. An elastic ring (515) is provided on the inner wall of the storage hole (514). The front and rear ends of the outer spring (510) are fixedly connected to the pressure shaft (508) and the end of the inner hole (506), respectively. The backflushing chamber mechanism (8) includes a backflushing chamber channel (801), there are two backflushing chamber channels (801) and they are respectively installed at the upper and lower ends of the chamber channel component (501). The inner side of the backflushing chamber channel (801) is provided with a receiving groove (802) aligned with the through groove (505). The outlet end of the backflushing chamber channel (801) is connected to a front connecting pipe (803). The front connecting pipe (803) is connected to a drain pipe (804). A water pressure sensor (805) is provided on the inner wall of the drain pipe (804). The drive mechanism (9) includes a mounting bracket (901), which is fixedly installed on the outside of the backflushing chamber (801). A second electric cylinder (902) is fixedly installed on the outer end of the mounting bracket (901). The drive end of the second electric cylinder (902) passes through the backflushing chamber (801) and is connected to a movable shaft (903). A groove block (904) is fixedly installed at the bottom end of the movable shaft (903). A sealing strip (905) is also fixedly installed on the shaft of the movable shaft (903). When the sealing strip (905) closes the through groove (505), the groove block (904) is located in the through groove (505) and aligned with the groove ear (602). The groove block (904) and the groove ear (602) are both provided with mutually compatible grooves.

2. A centrifugal pump with filtration function according to claim 1, characterized in that: The pump body assembly (2) includes a shaft housing (201), which is fixedly mounted on a fixed base (1). Bearings are installed at both the front and rear ends of the shaft housing (201). A pump shaft (202) is sleeved onto the bearings installed on the shaft housing (201). An impeller (203) is fixedly sleeved onto the front end of the pump shaft (202). A pump casing (204) is provided on the outer side of the impeller (203). A port (205) is opened at the front end of the pump casing (204). A sealing ring (206) is installed on the rear side, and the sealing ring (206) is movably sleeved with the shaft of the pump shaft (202). An outer shell (207) is fixedly installed on the outside of the pump housing (204). The rear side of the outer shell (207) is connected to the shaft housing component (201). A motor (208) is connected to the rear end of the shaft of the pump shaft (202). The liquid outlet pipe (4) is connected to the pump housing (204) along the tangent direction of the inner wall curved surface of the pump housing (204). The liquid outlet pipe (4) communicates with the internal space of the pump housing (204).

3. The centrifugal pump with filtration function according to claim 2, characterized in that: The storage compartment component (501) is fixedly connected to the port (205).

4. The centrifugal pump with filtration function according to claim 3, characterized in that: A backflush pipe (806) is installed on the rear side of the backflush chamber (801). The inlet end of the backflush pipe (806) is connected to a rear connecting pipe (807). The rear connecting pipe (807) is connected to a branch pipe (808). An outer pipe (809) is connected to the bottom of the pump housing (204) along the tangent direction of its inner wall surface. A piston (810) is movably sleeved in the outer pipe (809). A mounting base (811) is fixedly installed on the upper end of the pump housing (204). A first electric cylinder (812) is fixedly installed on the upper end of the mounting base (811). The end of the drive shaft of the first electric cylinder (812) is fixedly connected to the piston (810). The bottom end of the outer pipe (809) is fixedly connected to the branch pipe (808).

5. The centrifugal pump with filtration function according to claim 4, characterized in that: The pressure sensor (507) is electrically connected to the second electric cylinder (902) and the first electric cylinder (812), and sends a contraction signal to drive the second electric cylinder (902) and the first electric cylinder (812) to contract. The water pressure sensor (805) is electrically connected to the second electric cylinder (902) and the first electric cylinder (812), and sends an extension signal to drive the second electric cylinder (902) and the first electric cylinder (812) to extend.

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