Submersible centrifugal pump

Abstract

The invention relates to the technical field of centrifugal pumps, and provides a submersible centrifugal pump which comprises a mounting base. The bearing plate is arranged on the mounting base, the bearing plate is provided with two inclined bearing surfaces, and the two inclined bearing surfaces are symmetrically arranged at an interval; the pump body is arranged on the bearing plate and abuts against the inclined bearing face. The two ends of the limiting blocking piece are detachably connected with the bearing plate, and the pump body is located between the two inclined bearing faces and the limiting blocking piece. By means of the technical scheme, the problems that in the prior art, a traditional submersible centrifugal pump installation structure cannot adapt to some special occasions, cannot meet the stability requirement and cannot adapt to installation of submersible centrifugal pumps of various specifications are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal pumps, and in particular to a submersible centrifugal pump. Background Art

[0002] In many scenarios, water needs to be transported from one place to another, such as water supply and drainage in municipal engineering, sewage discharge in urban industry and commerce, drainage and river water intake in mining construction, etc. Submersible centrifugal pumps are widely used because they can efficiently complete water transportation tasks. They mainly use the centrifugal force generated by the high-speed rotation of the impeller to extract liquid.

[0003] As we all know, submersible centrifugal pumps work submerged in water, so their stability underwater needs to be guaranteed to ensure normal operation. Currently, submersible centrifugal pumps have coupled installation, mobile installation and inclined-pull installation, but these traditional installation methods often require complex foundation construction and guide rail installation, but these traditional installation methods often require a solid foundation. In some special occasions, such as temporary water intake or places with silt, traditional installation methods have limitations and are not suitable for the installation of submersible centrifugal pumps of various specifications and sizes. Summary of the invention

[0004] The present invention provides a submersible centrifugal pump, which solves the problems in the related art that the traditional submersible centrifugal pump installation structure cannot adapt to some special occasions, cannot meet the stability requirements, and is not suitable for the installation of submersible centrifugal pumps of various specifications.

[0005] The technical solution of the present invention is as follows: A submersible centrifugal pump, comprising: Install the base; A supporting plate, the supporting plate is arranged on the mounting base, the supporting plate has two inclined supporting surfaces, and the two inclined supporting surfaces are arranged at intervals and symmetrically; A pump body, the pump body being arranged on the supporting plate and abutting against the inclined supporting surface; A limit stopper, both ends of which are detachably connected to the supporting plate, and the pump body is located between the two inclined supporting surfaces and the limit stopper.

[0006] As a further technical solution, there are two support plates, the two support plates are arranged at an interval, and the length of the support plate is much smaller than the length of the pump body, and the two ends of the pump body are respectively arranged on the two support plates.

[0007] As a further technical solution, the mounting base is frame-shaped, and the two supporting plates are slidably arranged on the mounting base along the length direction of the mounting base. After sliding, the two supporting plates move closer to or away from each other, and both ends of the supporting plates are covered on the mounting base.

[0008] As a further technical solution, the cross-section of the support plate is an isosceles trapezoid, and both ends of the support plate have L-shaped limiting portions. Both ends of the support plate are covered on the mounting base by the L-shaped limiting portions, and both sides of the mounting base have sliding grooves, and the L-shaped limiting portions are slidably arranged in the sliding grooves.

[0009] As a further technical solution, the limit stopper is an arc-shaped stopper rod, both sides of the support plate have strip grooves, and the two ends of the limit stopper are detachably arranged in the two strip grooves.

[0010] As a further technical solution, both ends of the limit stopper have mounting portions, the mounting portions penetrate the strip groove, and the L-shaped limit portion and the mounting portion both abut against the mounting base, and further include: A connecting piece is connected through the L-shaped limiting portion, the mounting base and the mounting portion.

[0011] As a further technical solution, there are a plurality of limit stops, and the plurality of limit stops are arranged at intervals along the length direction of the mounting base.

[0012] As a further technical solution, the pump body is cylindrical, has water inlets on all sides of the pump body, and further comprises: A cleaning ring is movably arranged relative to the pump body, and the cleaning ring is sleeved on the pump body. After the cleaning ring moves, it is used to clean impurities at the water inlet.

[0013] As a further technical solution, the plurality of water inlets are located between the two support plates, and further comprises: A support rod, wherein the support rod is arranged on the mounting base and is located below the water inlet, and both ends of the support rod respectively penetrate the two supporting plates, the supporting plates are movably arranged relative to the support rod, and the support rod penetrates the cleaning ring.

[0014] As a further technical solution, it also includes: A plurality of cutting blades are respectively arranged on both sides of the cleaning ring and abut against the outer surface of the pump body. The plurality of cutting blades are arranged along the circumference of the cleaning ring. When the cleaning ring moves, the cutting blades are driven to cut off the impurities.

[0015] The working principle and beneficial effects of the present invention are: 1. Enhanced stability The support plate has two spaced-apart and symmetrically arranged inclined supporting surfaces, and the pump body is placed on the supporting surfaces. This inclined design allows the pump body to be stably supported between the two inclined supporting surfaces. At the same time, its top is restricted by a limit stopper to form all-round support. Compared with traditional planar support methods, it can better resist the vibration and shaking generated by the pump during operation, especially in complex underwater environments, ensuring the stable operation of the pump and reducing problems such as wear of mechanical parts and loose pipe connections caused by shaking.

[0016] The detachable connection between the limit stopper and the support plate further ensures that the pump body is fixed in position after installation, prevents the pump body from being displaced under the impact of water flow or other external forces, and improves the reliability of the entire system.

[0017] 2. Easy installation and maintenance The design of the support plate and mounting base makes the installation position of the pump body clear and fixed. The installer only needs to place the pump body on the inclined support surface and install the limit stopper to complete the installation. The operation is simple and quick, and no complicated positioning and calibration process is required.

[0018] When the pump body needs to be maintained or overhauled, the limit stopper can be easily removed because it is detachable, so that the pump body can be easily taken out from the supporting plate, which reduces the difficulty and time of maintenance work and improves work efficiency.

[0019] 3. Adapt to different working conditions This design structure can adapt to submersible centrifugal pumps of different sizes and types. By adjusting the position of the limit stopper or designing support plates of different specifications, it can meet the installation requirements of various pump bodies, making the installation structure highly versatile and suitable for a variety of application scenarios, such as sewage discharge, irrigation, industrial drainage, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0021] Figure 1 This is a schematic structural diagram of a submersible centrifugal pump from the first perspective of the present invention; Figure 2 For the present invention Figure 1 Partial magnified image; Figure 3 It is a structural schematic diagram of a submersible centrifugal pump in the present invention from a second viewing angle; Figure 4 This is a schematic diagram of the internal structure of a submersible centrifugal pump in the present invention; Figure 5 For the present invention Figure 2 Enlarged view of part A in the middle; Figure 6 For the present invention Figure 4 Enlarged view of middle part B; Figure 7 This is a diagram showing the coordination of the mounting base and the support rod in the present invention; Figure 8 For the present invention Figure 7 Partial enlargement.

[0022] In the figure: 1. mounting base, 101. slide groove, 2. supporting plate, 201. inclined supporting surface, 202. L-shaped limiting portion, 203. strip groove, 3. pump body, 301. water inlet, 4. limiting stopper, 401. mounting portion, 5. connecting piece, 6. cleaning ring, 7. support rod, 8. cutting blade. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0024] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0025] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] Reference Figure 1 to Figure 8, which is the first embodiment of the present invention, proposes a submersible centrifugal pump, including: a mounting base 1; a supporting plate 2, the supporting plate 2 is arranged on the mounting base 1, the supporting plate 2 has two inclined supporting surfaces 201, the two inclined supporting surfaces 201 are arranged at intervals and symmetrically; a pump body 3, the pump body 3 is arranged on the supporting plate 2 and abuts the inclined supporting surfaces 201; a limit stopper 4, both ends of the limit stopper 4 are detachably connected to the supporting plate 2, and the pump body 3 is located between the two inclined supporting surfaces 201 and the limit stopper 4.

[0028] In this embodiment, the configuration working principle of the submersible centrifugal pump is as follows: first, the pump body 3 must be placed and positioned, and the pump body 3 must be placed on the inclined supporting surface 201 of the supporting plate 2. The two sets of inclined supporting surfaces 201 are symmetrically arranged at an angle, and then the pump body 3 naturally rolls or slides toward the lower end of the inclined supporting surface 201 under the action of its own gravity until it is in a stationary state, completing the initial configuration without the need for the previous complex foundation construction and guide rail installation; then, according to the size of each different pump body 3, a suitable limit stopper 4 is used, and its two ends are installed on the supporting plate 2 using fasteners or clamping wedges that can be quickly disassembled, ensuring that the pump body 3 can be stably in the initially configured position to prepare for subsequent fixation and operation. For example, the vibration or centrifugal force generated inside the pump body 3 will try to change the position of the pump body 3. However, the stable limit structure formed by the inclined supporting surface 201 and the limit stopper 4 can effectively offset these forces and prevent the pump body 3 from moving.

[0029] When in use, first install the mounting base 1 made of corrosion-resistant steel structure and with regular shape on the predetermined position, which should be a flat and solid ground or a specially designed supporting structure. Use a spirit level to check the levelness of the mounting base 1 in advance. If it is uneven, it can be adjusted by adding gaskets under the base, etc., so as to ensure the angle requirement of the pump body 3 when working; then install the supporting plate 2 on the mounting base 1, with no requirement on the number, and it can be designed as a whole or in parts, as long as it can stably support the pump body 3. If the two are connected by bolts, holes corresponding to the bolt holes of the supporting plate 2 can be pre-drilled on the mounting base 1. If welding is required, this work needs to be completed in advance and the welding position must be determined in advance; finally, place the pump body 3 and assemble the limit stopper 4 as in the above steps, and check whether the position of the pump body 3 is stable.

[0030] Compared with the traditional complex foundation construction and guide rail installation, the symmetrically arranged inclined supporting surface 201 and the limit stopper 4 form a stable three-point support structure that can better resist the vibration and shaking generated by the pump during operation, especially in complex underwater environments, ensuring the stable operation of the pump and reducing problems such as wear of mechanical parts and loose pipe connections caused by shaking. At the same time, the detachable connection of the limit stopper 4 can also adapt to the reuse of pump bodies 3 of different specifications, thereby improving overall practicality.

[0031] Furthermore, there are two supporting plates 2 , which are spaced apart from each other, and the length of the supporting plates 2 is much smaller than the length of the pump body 3 , and both ends of the pump body 3 are respectively arranged on the two supporting plates 2 .

[0032] In this embodiment, since the pump body 3 is relatively long, the structure of the integral support plate 2 supporting the pump body 3 is relatively costly, so it is set up separately, using two sets of support plates 2 whose lengths are much smaller than the lengths of the pump body 3. The two ends of the pump body 3 can be supported on the mounting base 1, thereby avoiding the deformation of the support plate 2 due to excessive local force. The two support plates 2 can better position the stable posture of the pump body 3 and reduce the shaking caused by uneven force.

[0033] From the perspective of installation and maintenance, compared with the case where a long support plate 2 supports the entire pump body 3, there is more room for operation. For example, if it is necessary to inspect or repair the components at one end of the pump body 3 (such as cable connections and sealing components close to the motor side), it is only necessary to focus on the connection parts related to the support plate 2 at this end. There is no need to dismantle or adjust the supporting structure of the entire pump body 3 on a large scale as in the case of using a single long support plate 2; for example, in some complex installation environments, such as limited space or installation planes with a certain angle, the design of two short support plates 2 is more adaptable, and the position and angle of the two support plates 2 can be flexibly adjusted according to the actual installation conditions to better adapt to the environment.

[0034] Furthermore, the mounting base 1 is frame-shaped, and the two supporting plates 2 are slidably arranged on the mounting base 1 along the length direction of the mounting base 1. After sliding, the two supporting plates 2 move closer to or farther away from each other, and both ends of the supporting plates 2 are covered on the mounting base 1.

[0035] In this embodiment, a frame-shaped mounting base 1 with an I-shaped cross-section is used to ensure overall stability, and the support plate 2 is designed to slide along its length direction. This means that during the installation process, there is no need to specially customize the mounting base 1 and the support plate 2 for different pump bodies 3. A universal mounting base 1 can meet the installation requirements of pump bodies 3 of various specifications. There is no need to open a mounting hole on the mounting base 1 that is compatible with the pump body 3. The stepless adjustment is more suitable for some application scenarios with high precision in the installation position of the pump body 3, such as docking with a specific pipeline system or installation in a limited space.

[0036] If the pump body 3 needs to be maintained or repaired, the sliding support plate 2 can easily change the operating space. If the middle or bottom of the pump body 3 needs to be inspected or repaired, the two support plates 2 can be slid apart appropriately to increase the operating space in the middle, so that maintenance personnel can more easily access the parts that need repair.

[0037] At the same time, the cover arrangement of the support plate 2 can improve the sliding accuracy and ensure stable sliding, while also protecting the support plate 2 to prevent it from being disturbed or collided by external objects during the sliding process.

[0038] Furthermore, the cross-section of the supporting plate 2 is an isosceles trapezoid, and both ends of the supporting plate 2 have L-shaped limiting portions 202. Both ends of the supporting plate 2 are covered on the mounting base 1 through the L-shaped limiting portions 202. Both sides of the mounting base 1 have sliding grooves 101, and the L-shaped limiting portions 202 are slidably set in the sliding grooves 101.

[0039] In this embodiment, the cross-section of the support plate 2 is set to be an isosceles trapezoid. On the one hand, it can accommodate two sets of symmetrical inclined support surfaces 201. On the other hand, it can improve its own stability during actual installation and use. When bearing the weight of the pump body 3 and external force, its center of gravity distribution is more reasonable, reducing the possibility of rollover or distortion due to uneven force.

[0040] The L-shaped limit parts at both ends of the support plate 2 cooperate with the slide grooves 101 on both sides of the mounting base 1, providing precise guidance for the sliding of the support plate 2. During the installation process, the installer can easily slide the support plate 2 along the slide grooves 101 to adjust the position. This precise guiding mechanism ensures that the support plate 2 will not deviate from the predetermined direction during the adjustment process, making the installation position of the pump body 3 more accurate, and the L-shaped limit part effectively prevents the support plate 2 from escaping from the mounting base 1, realizing the covering function, and the installation is also extremely convenient. The installer only needs to align the L-shaped limit part with the slide groove 101 of the mounting base 1, and then push the support plate 2 in to complete the installation. The operation is simple and intuitive. When the position of the support plate 2 needs to be adjusted to adapt to different pump body 3 sizes or to perform maintenance operations, the support plate 2 can also be easily slid along the slide groove 101, thereby improving the efficiency of installation and maintenance.

[0041] Furthermore, the limit stopper 4 is an arc-shaped stopper rod, and both sides of the supporting plate 2 have strip grooves 203 , and both ends of the limit stopper 4 are detachably disposed in the two strip grooves 203 .

[0042] In this embodiment, since the outer surface of the pump body 3 is basically an arc surface, the limit stopper 4 is set as an arc stopper rod, which fits the pump body 3, thereby more effectively limiting the movement of the pump body 3 in the axial and radial directions, and avoiding scratches or damage caused by excessive local pressure on the surface of the pump body 3. In the long-term use process, especially for some pump bodies 3 with high surface accuracy requirements, this protective effect can extend the service life of the pump body 3.

[0043] In order to further increase the installation and adjustment forms of the limit stopper 4, strip grooves 203 are opened on both sides of the support plate 2, so that the limit stopper 4 can be flexibly adjusted within a certain range. During the installation process, if it is found that the placement position of the pump body 3 on the support plate 2 is slightly deviated, or the limit position needs to be adjusted according to the size of the pump body 3 of different models, the limit position can be easily fine-tuned by moving the two ends of the limit stopper 4 in the strip groove 203.

[0044] For the detachable form of both ends, a slot-block installation or a pin-socket installation can be used, and a slot is set in the strip groove 203 on both sides of the support plate 2. The slot can be a dovetail slot, a T-slot, etc. The two ends of the limit stopper 4 (arc-shaped stopper rod) are designed with matching blocks; a socket is set at the end of the strip groove 203 on both sides of the support plate 2, and the inner diameter of the socket should match the outer diameter of the pin, and the socket should have a certain depth to ensure that a stable connection can be provided after the pin is inserted.

[0045] Furthermore, both ends of the limit stopper 4 have mounting portions 401 , the mounting portion 401 passes through the strip groove 203 , and both the L-shaped limit portion 202 and the mounting portion 401 abut against the mounting base 1 , and also include: a connecting member 5 , the connecting member 5 passes through and connects the L-shaped limit portion 202 , the mounting base 1 and the mounting portion 401 .

[0046] Furthermore, there are a plurality of limit stoppers 4 , and the limit stoppers 4 are arranged at intervals along the length direction of the mounting base 1 .

[0047] In this embodiment, a detachable form is combined at each position to avoid reciprocating operation, and mounting parts 401 are welded on both ends of the limit stopper 4. The through-strip groove 203 and the L-row limit part 202 of the support plate 2 are both in contact with the mounting base 1, and then a through-connection can be directly achieved through a set of connecting parts 5, without the need for additional multiple sets of structures, such as bolts and nuts that directly penetrate the three to complete the assembly, and the pump body 3 can be stably confined therein.

[0048] The slide groove 101 has another advantage. Since the L-shaped limiting portion has a certain length and the diameters of the cross sections of the cylindrical pump body 3 are different, the two support plates 2 may sometimes need to be at different heights to ensure the horizontality of the position of the pump body 3. Therefore, the L-shaped limiting portion that runs through the slide groove 101 can drive the support plate 2 to slide along the mounting base 1 as a whole, and also has a certain height adjustment function. After finally determining the positions of the two sets of support plates 2 and several limit stops 4 thereon, the connecting piece 5 is finally used to penetrate the three to complete the fixed assembly operation.

[0049] Furthermore, the pump body 3 is cylindrical, and has water inlets 301 on all sides of the pump body 3. It also includes: a cleaning ring 6, which is movably arranged relative to the pump body 3 and is sleeved on the pump body 3. After the cleaning ring 6 moves, it is used to clean impurities at the water inlet 301.

[0050] In the present embodiment, when the pump body 3 is in operation, there is another difficult problem to deal with, namely, the blockage problem at the water inlet 301. The blockage of the internal pipe or filter can only be solved by removing the pump body 3, while the weeds or other larger foreign objects outside the water inlet 301 can be removed by a movable cleaning ring 6. Compared with the traditional manual cleaning method using pliers or hooks, this structure is simpler and easier to clean and maintain.

[0051] Specifically, the cleaning ring 6 mounted on the cylindrical pump body 3 can push out impurities at the water inlet 301 after being moved relative to the pump body 3 by external force. The ring shape is used because the pump body 3 is provided with water inlets 301 all around, ensuring that all water inlets 301 can be covered.

[0052] Furthermore, several water inlets 301 are located between two supporting plates 2, and also include: a support rod 7, which is arranged on the mounting base 1 and is located below the water inlet 301, and both ends of the support rod 7 respectively penetrate the two supporting plates 2, the supporting plates 2 are movably arranged relative to the support rod 7, and the support rod 7 penetrates the cleaning ring 6.

[0053] In this embodiment, a cleaning ring 6 needs to be further installed at a certain position. On the one hand, it can stably support the cleaning ring 6, and on the other hand, it can change the configuration of the pump body 3. It is not only placed on the support plate 2 from one direction, but it is necessary to consider the cleaning ring 6 between the two support plates 2. The pump body 3 needs to pass through the cleaning ring 6, so as to realize the configuration more quickly. Therefore, the support rod 7 is welded to the mounting base 1, and in order to adapt to the relative movement of the support plate 2, the two ends of the support rod 7 respectively pass through the two support plates 2.

[0054] Furthermore, it also includes: a plurality of cutting blades 8, which are respectively arranged on both sides of the cleaning ring 6 and abut against the outer surface of the pump body 3. Both sides of the cleaning ring 6 are annular, and the plurality of cutting blades 8 are arranged at intervals along the annular path. After the cleaning ring 6 moves, it drives the cutting blades 8 to cut off impurities.

[0055] In this embodiment, a plurality of cutting blades 8 are welded on the circumference of the cleaning ring 6, so as to use the cutting blades 8 to cut off weeds and other impurities pushed out of the water inlet 301 after the cleaning ring 6 moves, so as to avoid the failure of cleaning by relying solely on thrust.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A submersible centrifugal pump, characterized in that: include: Install the base (1); A supporting plate (2), the supporting plate (2) being arranged on the mounting base (1), the supporting plate (2) having two inclined supporting surfaces (201), the two inclined supporting surfaces (201) being arranged at intervals and symmetrically; A pump body (3), the pump body (3) being arranged on the supporting plate (2) and abutting against the inclined supporting surface (201); A limit stopper (4), both ends of which are detachably connected to the support plate (2), and the pump body (3) is located between the two inclined support surfaces (201) and the limit stopper (4).

2. A submersible centrifugal pump according to claim 1, characterized in that: There are two support plates (2), the two support plates (2) are arranged at an interval, and the length of the support plates (2) is much smaller than the length of the pump body (3), and the two ends of the pump body (3) are respectively arranged on the two support plates (2).

3. A submersible centrifugal pump according to claim 2, characterized in that: The mounting base (1) is frame-shaped, and the two supporting plates (2) are both slidably arranged on the mounting base (1) along the length direction of the mounting base (1). After sliding, the two supporting plates (2) move closer to or farther from each other, and both ends of the supporting plates (2) are covered on the mounting base (1).

4. A submersible centrifugal pump according to claim 3, characterized in that: The cross section of the supporting plate (2) is an isosceles trapezoid, and both ends of the supporting plate (2) are provided with L-shaped limiting portions (202), and both ends of the supporting plate (2) are covered on the mounting base (1) through the L-shaped limiting portions (202), and both sides of the mounting base (1) are provided with sliding grooves (101), and the L-shaped limiting portions (202) are slidably arranged in the sliding grooves (101).

5. A submersible centrifugal pump according to claim 4, characterized in that: The position-limiting stopper (4) is an arc-shaped stopper rod, and both sides of the support plate (2) are provided with strip grooves (203), and the two ends of the position-limiting stopper (4) are respectively detachably arranged in the two strip grooves (203).

6. A submersible centrifugal pump according to claim 5, characterized in that: Both ends of the position-limiting stopper (4) are provided with mounting portions (401), the mounting portions (401) pass through the strip-shaped groove (203), and the L-shaped position-limiting portion (202) and the mounting portions (401) are both in contact with the mounting base (1), and further comprising: A connecting piece (5), the connecting piece (5) penetrates and connects the L-shaped limiting portion (202), the mounting base (1) and the mounting portion (401).

7. A submersible centrifugal pump according to claim 6, characterized in that: There are a plurality of the limit stoppers (4), and the plurality of limit stoppers (4) are arranged at intervals along the length direction of the mounting base (1).

8. A submersible centrifugal pump according to claim 2, characterized in that: The pump body (3) is cylindrical, has water inlets (301) on all four sides, and further comprises: A cleaning ring (6), the cleaning ring (6) being arranged to move relative to the pump body (3), and the cleaning ring (6) being sleeved on the pump body (3), and the cleaning ring (6) being used to clean impurities at the water inlet (301) after being moved.

9. A submersible centrifugal pump according to claim 8, characterized in that: The plurality of water inlets (301) are all located between the two support plates (2), and further include: A support rod (7), the support rod (7) being arranged on the mounting base (1) and being located below the water inlet (301), the two ends of the support rod (7) respectively passing through the two support plates (2), the support plates (2) being arranged to move relative to the support rod (7), and the support rod (7) passing through the cleaning ring (6).

10. A submersible centrifugal pump according to claim 9, characterized in that: Also includes: A plurality of cutting blades (8) are respectively arranged on both sides of the cleaning ring (6) and abut against the outer surface of the pump body (3); the plurality of cutting blades (8) are arranged along the circumference of the cleaning ring (6); when the cleaning ring (6) moves, it drives the cutting blades (8) to cut off the impurities.

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