Novel submersible axial flow pump device

Abstract

The invention discloses a novel submersible axial flow pump device which comprises a station body constructed between a water inlet pool and a water outlet pool, and a pump body mounting cavity is formed in the station body; the water inlet cylinder seat is arranged in the pump body mounting cavity of the station body, the bottom of the water inlet cylinder seat is closed, and the top of the water inlet cylinder seat is lower than the water inlet side of the station body; the water outlet cylinder body is arranged in the pump body mounting cavity of the station body and is coaxial with the water inlet cylinder seat, the lower end of the water outlet cylinder body is supported on the water inlet cylinder seat, and the upper end of the water outlet cylinder body extends to be close to the top of the station body; the submersible axial flow pump is mounted in the water outlet barrel; the water inlet end of the through-wall water outlet pipe penetrates through the wall body of the station body, then extends into the pump body mounting cavity and is connected with the upper part of the water outlet barrel, and the water outlet end of the through-wall water outlet pipe extends to the water outlet side of the station body. The excavation volume of the water inlet and outlet pool is reduced, the occupied area and investment are correspondingly reduced, and arrangement is more flexible.

Description

Technical Field

[0001] This invention relates to the field of pump station technology, and in particular to a novel submersible axial flow pump device. Background Technology

[0002] Traditional low-lift pumping stations typically consist of a forebay, intake pool, pump station body, and outlet pool. Due to the required pump installation elevation, the pump station body has a low base elevation, and the bottom elevations of the intake and outlet pools connected to the pump station body are also correspondingly low. This results in extensive excavation work for the intake and outlet pools and the forebay, leading to higher investment, larger land area, and less flexible layout. To control investment, the pump installation elevation cannot be too low, which limits the effective net positive suction head (NPSH) of the pumps and can sometimes cause harmful turbidity, reducing the pump's service life.

[0003] Therefore, through beneficial exploration and research, the applicant has found a solution to the above problems, and the technical solution to be introduced below is the result of this research. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a new type of submersible axial flow pump device that has less excavation work for the inlet and outlet pools and forebay, lower investment, smaller footprint, flexible layout, and large effective air turbidity margin of the pump, in order to overcome the shortcomings of the prior art.

[0005] The technical problem to be solved by this invention can be achieved by the following technical solution: A novel submersible axial flow pump device includes: The station body is constructed between the inlet pool and the outlet pool. The station body has a pump body installation chamber. The side of the station body closer to the inlet pool is the inlet side that communicates with the pump body installation chamber, and the side of the station body closer to the outlet pool is the outlet side. The water inlet cylinder seat is installed in the pump body mounting chamber of the station body, and the bottom of the water inlet cylinder seat is closed and its top is lower than the water inlet side of the station body; An outlet cylinder is installed in the pump body mounting chamber of the station body and is arranged coaxially with the inlet cylinder seat. The lower end of the outlet cylinder is supported on the inlet cylinder seat, and its upper end extends to near the top of the station body. A submersible axial flow pump installed inside the outlet cylinder; and The inlet end of the through-wall water outlet pipe passes through the wall of the station body and extends into the pump body installation chamber and connects to the upper part of the outlet cylinder. Its outlet end extends to the outlet side of the station body.

[0006] In a preferred embodiment of the present invention, an inlet side door groove is provided on the water inlet side of the station body, and an outlet side door groove is provided on its outlet side; when in working condition, a trash rack is provided in the inlet side door groove; when in maintenance condition, maintenance doors are provided in the inlet side door groove and the outlet side door groove.

[0007] In a preferred embodiment of the present invention, a sand-blocking sill is provided at the bottom of the water inlet side of the station.

[0008] In a preferred embodiment of the present invention, a top cover plate is detachably provided on the top of the station body above the water outlet cylinder, a top steel beam is detachably horizontally provided inside the top of the station body, a water outlet cylinder base is provided at the outer periphery of the upper end of the water outlet cylinder, the water outlet cylinder base is supported on the top steel beam, and walkway plates are respectively provided on both sides of the top steel beam located on the water outlet cylinder base.

[0009] In a preferred embodiment of the present invention, the water inlet cylinder seat includes: An outer cylinder is disposed in the pump mounting chamber of the station body and its top surface is lower than the water inlet side of the station body; The inner cylinder is coaxially arranged inside the outer cylinder, and the lower end of the water outlet cylinder is installed on the upper end of the inner cylinder; A base plate, wherein the base plate is disposed at the bottom of the outer cylinder and located below the inner cylinder; and A plurality of flow guiding connecting plates are circumferentially spaced between the outer cylinder and the inner cylinder, and the inner and outer edges of each flow guiding connecting plate are fixedly connected to the outer cylinder surface of the inner cylinder and the inner cylinder surface of the outer cylinder.

[0010] In a preferred embodiment of the present invention, the upper part of the inner cylinder is formed with a lower conical snap-fit ​​surface, and the lower part of the water outlet cylinder is formed with an upper conical snap-fit ​​surface that mates with the lower conical snap-fit ​​surface.

[0011] In a preferred embodiment of the present invention, a water guide cone is provided on the upper plate surface of the bottom plate of the water inlet cylinder seat below the submersible axial flow pump, and a horn tube is provided in the lower end of the inner cylinder below the submersible axial flow pump.

[0012] In a preferred embodiment of the present invention, a water outlet cylinder cover plate is detachably installed on the top surface of the water outlet cylinder body. An anti-lifting sleeve for preventing the submersible axial flow pump from lifting is provided inside the water outlet cylinder body between the water outlet cylinder cover plate and the submersible axial flow pump. A pump junction box is provided inside the top of the station body. One end of the cable in the pump junction box is connected to an external power source through a cable tray, and the other end passes through the water outlet cylinder cover plate and extends into the anti-lifting sleeve, and is connected to the submersible axial flow pump through the anti-lifting sleeve.

[0013] In a preferred embodiment of the present invention, the inlet end of the through-wall water outlet pipe is connected to the upper part of the water outlet cylinder via an expansion joint.

[0014] In a preferred embodiment of the present invention, a flow interruption flap is provided at the outlet end of the through-wall water pipe.

[0015] In a preferred embodiment of the present invention, a first drainage component is further provided inside the station body. The first drainage component includes a first drainage pipe and a first drainage shut-off valve. One end of the first drainage pipe is connected to the bottom of the water inlet cylinder seat, and the other end extends to the drainage area. The first drainage shut-off valve is installed on the first drainage pipe.

[0016] In a preferred embodiment of the present invention, a second drainage assembly is further provided inside the station body. The second drainage assembly includes a second drainage pipe and a second drainage shut-off valve. One end of the second drainage pipe is connected to the bottom of the water outlet side of the station body, and the other end extends to the drainage area. The second drainage shut-off valve is installed on the second drainage pipe.

[0017] In a preferred embodiment of the present invention, a silt flushing assembly is further provided within the station body. The silt flushing assembly includes a silt flushing main pipe, a silt flushing ring pipe, a plurality of silt flushing nozzles, and a silt flushing shut-off valve. The silt flushing ring pipe is provided on the outer periphery of the lower part of the water inlet cylinder seat. The plurality of silt flushing nozzles are circumferentially spaced on the silt flushing ring pipe, and the spray end of each silt flushing nozzle passes through the water inlet cylinder seat and enters the water inlet cylinder seat. Each silt flushing nozzle is inclined downward and has a certain horizontal offset. One end of the silt flushing main pipe is connected to the silt flushing ring pipe, and the other end is connected to a high-pressure water supply device. The silt flushing shut-off valve is installed on the silt flushing main pipe.

[0018] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows: The present invention improves the water intake method of the submersible axial flow pump, so that the installation elevation of the submersible axial flow pump is no longer related to the elevation of the bottom plate of the inlet and outlet water tanks. The elevation of the bottom plate of the inlet and outlet water tanks is basically the same as the elevation of the riverbed, which greatly reduces the amount of excavation of the inlet and outlet water tanks, and the footprint and investment are also reduced accordingly. The layout is also more flexible, and the installation elevation of the submersible axial flow pump can be appropriately reduced, which improves the effective net positive suction head of the pump and thus improves the service life of the pump. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of the novel submersible axial flow pump device of the present invention.

[0021] Figure 2 This is a cross-sectional view of the novel submersible axial flow pump device of the present invention.

[0022] Figure 3 This is a diagram of the main electromechanical equipment of the novel submersible axial flow pump device of the present invention.

[0023] Figure 4 yes Figure 2 Enlarged diagram of point A.

[0024] Figure 5 yes Figure 2 Enlarged diagram of point B. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0026] See Figures 1 to 5 The figure shows a new type of submersible axial flow pump device, including a station body 100, an inlet cylinder seat 200, an outlet cylinder 300, a submersible axial flow pump 400, and a through-wall outlet pipe 500.

[0027] The station body 100 is constructed between the inlet pool and the outlet pool, and contains a pump installation chamber 110. The side of the pump body 110 closest to the inlet pool is the inlet side 120, which communicates with the pump installation chamber 110, and the side of the pump body 110 closest to the outlet pool is the outlet side 130. The lower end of the inlet side 120 is roughly level with the bottom of the inlet pool, and the lower end of the inlet side 130 is roughly level with the bottom of the outlet pool. A sand-blocking sill 121 is installed at the bottom of the inlet side 120 of the station body 100. Its main function is to intercept silt, bedload, and other debris from the inlet pool, preventing them from entering the station body 100 and thus ensuring the normal operation of the facilities within the station.

[0028] The station body 100 has an inlet-side gate slot 121 at its inlet side 120 and an outlet-side gate slot 131 at its outlet side 130. When in operation, a trash rack 140 is installed in the inlet-side gate slot 121 to prevent debris from entering. During maintenance, the trash rack 140 is removed, and maintenance doors are installed in the inlet-side gate slot 121 and the outlet-side gate slot 131 to drain the water from the station body 100. This facilitates maintenance of the facilities and equipment within the station body 100. Maintenance of the submersible axial flow pump 400 does not require this; simply opening the outlet cylinder cover 330 allows the submersible axial flow pump 400 to be lifted out of the outlet cylinder 300. Furthermore, a detachable top cover 150 is installed on the top of the station body 100 above the outlet cylinder 300, allowing maintenance personnel easy access for repairs. A top steel beam 160 is detachably and horizontally installed inside the top of the station body 100. A water outlet cylinder base 340 is installed at the outer periphery of the upper end of the water outlet cylinder 300. The water outlet cylinder base 340 is supported on the top steel beam 160. Walkways 170 for maintenance personnel are respectively installed on both sides of the top steel beam 160 located on the water outlet cylinder base 340. The function of the top steel beam 160 is to prevent the upper part of the water outlet cylinder 300 from swaying horizontally, and at the same time to install the walkways 170.

[0029] The inlet cylinder seat 200 is disposed within the pump body mounting chamber 110 of the station body 100. The bottom of the inlet cylinder seat 200 is closed, and its top is lower than the water inlet side 120 of the station body 100. Specifically, the inlet cylinder seat 200 includes an outer cylinder 210, an inner cylinder 220, a bottom plate 230, and several guide connecting plates 240. The outer cylinder 210 is disposed within the pump body mounting chamber 110 of the station body 100, and its top surface is lower than the water inlet side 120 of the station body 100. The inner cylinder 220 is coaxially arranged within the outer cylinder 210. The bottom plate 230 is disposed at the bottom of the outer cylinder 210 and located below the inner cylinder 220, for sealing the bottom surface of the outer cylinder 210. Several flow guiding connecting plates 240 are circumferentially spaced between the outer cylinder 210 and the inner cylinder 220. The inner and outer edges of each flow guiding connecting plate 240 are fixedly connected to the outer cylinder surface of the inner cylinder 220 and the inner cylinder surface of the outer cylinder 210.

[0030] The outlet cylinder 300 is housed within the pump body mounting chamber 110 of the station body 100 and coaxially arranged with the inlet cylinder seat 200. The lower end of the outlet cylinder 300 is supported on the inlet cylinder seat 200, and its upper end extends to near the top of the station body 100. Specifically, the lower end of the outlet cylinder 300 is mounted on the upper end of the inner cylinder 220 of the inlet cylinder seat 200. A lower conical engaging surface 221 is formed on the upper part of the inner cylinder 220, and an upper conical engaging surface 310 is formed on the lower part of the outlet cylinder 300 to mate with the lower conical engaging surface 221. During installation, the upper conical engaging surface 310 of the outlet cylinder 300 engages with the lower conical engaging surface 221 of the inner cylinder 220, as shown below. Figure 4 As shown, the water outlet cylinder 300 transmits force to the inner cylinder 220 through a conical surface, and finally to the reinforced concrete structure of the station body 100 through several flow guiding connecting plates 240.

[0031] The submersible axial flow pump 400 is installed inside the outlet cylinder 300. Specifically, the lower part of the submersible axial flow pump 400 is fitted into the inner cylinder surface 320 of the lower part of the outlet cylinder 300 via a conical sleeve. Figure 5 As shown, a guide cone 250 is installed on the upper surface of the base plate 230 of the inlet cylinder 200, below the submersible axial flow pump 400. A bell pipe 260 is installed at the lower end of the inner cylinder 220, also below the submersible axial flow pump 400. The guide plate 240, guide cone 250, and bell pipe 260 ensure smooth water flow into the submersible axial flow pump 400, guaranteeing stable and safe operation of the submersible axial flow pump 400. Furthermore, the bottom of the guide cone 250 has several circumferentially spaced drainage holes for draining water from the inlet cylinder 200.

[0032] A detachable outlet cylinder cover 330 is installed on the top surface of the outlet cylinder 300. An anti-lifting sleeve 410 is installed inside the outlet cylinder 300, between the outlet cylinder cover 330 and the submersible axial flow pump 400, to prevent the submersible axial flow pump 400 from lifting. A pump junction box 600 is installed inside the top of the station body 100 via a steel beam. One end of the cable in the pump junction box 600 is connected to an external power source via a cable tray 610 built at the top of the station body 100, and the other end passes through the outlet cylinder cover 330 and extends into the anti-lifting sleeve 410, connecting to the submersible axial flow pump 400 through the anti-lifting sleeve 410. When the submersible axial flow pump 400 needs maintenance, drainage is not required. Simply disconnect the cable, open the outlet cylinder cover 330, and lift the submersible axial flow pump 400 directly out of the outlet cylinder 300 for maintenance.

[0033] The inlet end of the through-wall outlet pipe 500 passes through the wall 101 of the station body 100 and extends into the pump body mounting chamber 110, connecting to the upper part of the outlet cylinder 300. Its outlet end extends to the outlet side 130 of the station body 100. The inlet end of the through-wall outlet pipe 500 is connected to the upper part of the outlet cylinder 300 via an expansion joint 510 to facilitate adjustment of the installation position of the through-wall outlet pipe 500. A flow-stopping flap valve 520 is installed at the outlet end of the through-wall outlet pipe 500; the flow-stopping flap valve 520 is a hydraulic flap valve capable of bidirectional water blocking.

[0034] The novel submersible axial flow pump device of the present invention also includes a first drainage component 700a disposed within the station body 100. The first drainage component 700a includes a first drainage pipe 710a and a first drainage shut-off valve 720a. One end of the first drainage pipe 710a is connected to the bottom of the water inlet cylinder seat 200, and the other end extends to the drainage area. The first drainage shut-off valve 720a is installed on the first drainage pipe 710a.

[0035] The novel submersible axial flow pump device of the present invention further includes a second drainage assembly 700b disposed within the station body 100. The second drainage assembly 700b includes a second drainage pipe 710b and a second drainage shut-off valve 720b. One end of the second drainage pipe 710b is connected to the bottom of the outlet side of the station body 100, and the other end extends to the drainage area. The second drainage shut-off valve 720b is installed on the second drainage pipe 710b. During maintenance, water in the station body 100 can be drained through the first drainage assembly 700a and the second drainage assembly 700b to facilitate maintenance of the facilities and equipment within the station body 100.

[0036] The novel submersible axial flow pump device of the present invention also includes a sludge flushing assembly 800 disposed within the station body 100. The sludge flushing assembly 800 includes a main sludge flushing pipe 810, a sludge flushing ring pipe 820, a plurality of sludge flushing nozzles 830, and a sludge flushing shut-off valve 840. The sludge flushing ring pipe 820 is disposed on the outer periphery of the lower part of the inlet cylinder seat 200. A plurality of sludge flushing nozzles 830 are circumferentially spaced on the sludge flushing ring pipe 820, with the spray end of each nozzle passing through the inlet cylinder seat 200 and entering the inlet cylinder seat 200. Each nozzle 830 is inclined downwards and has a certain horizontal offset, forming a rotating water flow within the inlet cylinder seat 200 during sludge flushing, thereby improving the sludge flushing effect. One end of the main sludge flushing pipe 810 is connected to the sludge flushing ring pipe 820, and the other end is connected to a high-pressure water supply device. The sludge flushing shut-off valve 840 is installed on the main sludge flushing pipe 810. The mud and water formed by siltation can be discharged through the submersible axial flow pump 400 or through the first drainage component 700a.

[0037] The working principle of the novel submersible axial flow pump device of the present invention is as follows: The water inlet and outlet channels of this invention adopt a double-layer cylinder. The water inlet cylinder seat 200 is the water inlet channel, and the water outlet cylinder 300 is the water outlet channel. The water flows into the water inlet cylinder seat 200 from the water inlet side of the station body 100, first turns 90° and then turns 180° before entering the submersible axial flow pump 400. After being pressurized by the submersible axial flow pump 400, the water flows out of the water outlet cylinder 300 after turning 90° and then exits from the through-wall water outlet pipe 500.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A new submersible axial flow pump device, characterized in that, The utility model provides a kind of submersible axial flow pump station, comprising: Station body built between water inlet pool and water outlet pool, pump body installation chamber is formed in the station body, and the side close to the water inlet pool is water inlet side communicated with the pump body installation chamber, and the side close to the water outlet pool is water outlet side; Water inlet cylinder seat is arranged in the pump body installation chamber of the station body, the bottom of the water inlet cylinder seat is closed, and the top of the water inlet cylinder seat is lower than the water inlet side of the station body; Water outlet cylinder body is arranged in the pump body installation chamber of the station body and is coaxially arranged with the water inlet cylinder seat, the lower end of the water outlet cylinder body is supported on the water inlet cylinder seat, and the upper end of the water outlet cylinder body extends to close to the top of the station body; Submersible axial flow pump is installed in the water outlet cylinder body; And Wall water outlet pipe, the water inlet end of the wall water outlet pipe extends into the pump body installation chamber after passing through the wall of the station body and is connected with the upper part of the water outlet cylinder body, and the water outlet end of the wall water outlet pipe extends to the water outlet side of the station body.

2. The new submersible axial flow pump device as claimed in claim 1, wherein, Water inlet side door groove is arranged at the water inlet side of the station body, and water outlet side door groove is arranged at the water outlet side of the station body;When in working condition, the trash rack is arranged in the water inlet side door groove;When in maintenance condition, the water inlet side door groove and the water outlet side door groove are provided with maintenance door.

3. The new submersible axial flow pump apparatus of claim 1, wherein, Sand dam is arranged at the bottom of the water inlet side of the station body.

4. The new submersible axial flow pump apparatus of claim 1, wherein, Top cover plate is detachably arranged above the water outlet cylinder body, and anti-lifting sleeve is arranged between the top cover plate and the submersible axial flow pump in the water outlet cylinder body to prevent the submersible axial flow pump from lifting.

5. The new submersible axial flow pump apparatus of claim 1, wherein, The utility model provides a kind of submersible axial flow pump station, comprising: Station body built between water inlet pool and water outlet pool, pump body installation chamber is formed in the station body, and the side close to the water inlet pool is water inlet side communicated with the pump body installation chamber, and the side close to the water outlet pool is water outlet side; Water inlet cylinder seat is arranged in the pump body installation chamber of the station body, the bottom of the water inlet cylinder seat is closed, and the top of the water inlet cylinder seat is lower than the water inlet side of the station body; Water outlet cylinder body is arranged in the pump body installation chamber of the station body and is coaxially arranged with the water inlet cylinder seat, the lower end of the water outlet cylinder body is supported on the water inlet cylinder seat, and the upper end of the water outlet cylinder body extends to close to the top of the station body; Submersible axial flow pump is installed in the water outlet cylinder body; 6. The new submersible axial flow pump apparatus of claim 5, wherein, And 7. The new submersible axial flow pump apparatus of claim 5, wherein, Wall water outlet pipe, the water inlet end of the wall water outlet pipe extends into the pump body installation chamber after passing through the wall of the station body and is connected with the upper part of the water outlet cylinder body, and the water outlet end of the wall water outlet pipe extends to the water outlet side of the station body.

8. The new submersible axial flow pump apparatus of claim 1, wherein, Water inlet side door groove is arranged at the water inlet side of the station body, and water outlet side door groove is arranged at the water outlet side of the station body;When in working condition, the trash rack is arranged in the water inlet side door groove;When in maintenance condition, the water inlet side door groove and the water outlet side door groove are provided with maintenance door. Sand dam is arranged at the bottom of the water inlet side of the station body. Top cover plate is detachably arranged above the water outlet cylinder body, and anti-lifting sleeve is arranged between the top cover plate and the submersible axial flow pump in the water outlet cylinder body to prevent the submersible axial flow pump from lifting. The utility model provides a kind of submersible axial flow pump station, comprising: Station body built between water inlet pool and water outlet pool, pump body installation chamber is formed in the station body, and the side close to the water inlet pool is water inlet side communicated with the pump body installation chamber, and the side close to the water outlet pool is water outlet side; Water inlet cylinder seat is arranged in the pump body installation chamber of the station body, the bottom of the water inlet cylinder seat is closed, and the top of the water inlet cylinder seat is lower than the water inlet side of the station body; Water outlet cylinder body is arranged in the pump body installation chamber of the station body and is coaxially arranged with the water inlet cylinder seat, the lower end of the water outlet cylinder body is supported on the water inlet cylinder seat, and the upper end of the water outlet cylinder body extends to close to the top of the station body; Submersible axial flow pump is installed in the water outlet cylinder body; And Wall water outlet pipe, the water inlet end of the wall water outlet pipe extends into the pump body installation chamber after passing through the wall of the station body and is connected with the upper part of the water outlet cylinder body, and the water outlet end of the wall water outlet pipe extends to the water outlet side of the station body. Water inlet side door groove is arranged at the water inlet side of the station body, and water outlet side door groove is arranged at the water outlet side of the station body;When in working condition, the trash rack is arranged in the water inlet side door groove;When in maintenance condition, the water inlet side door groove and the water outlet side door groove are provided with maintenance door. Sand dam is arranged at the bottom of the water inlet side of the station body. Top cover plate is detachably arranged above the water outlet cylinder body, and anti-lifting sleeve is arranged between the top cover plate and the submersible axial flow pump in the water outlet cylinder body to prevent the submersible axial flow pump from lifting.

9. The new submersible axial flow pump apparatus of claim 1, wherein, The water inlet end of the through-wall water outlet pipe is connected to the upper part of the water outlet cylinder through an expansion joint.

10. The new submersible axial flow pump apparatus of claim 1, wherein, A flow cut-off flap is arranged at the water outlet end of the through-wall water outlet pipe.

11. The new submersible axial flow pump device, according to any one of claims 1 to 9, characterized in that, A first drainage assembly is arranged in the station body, which comprises a first drainage pipe and a first drainage stop valve, one end of the first drainage pipe is connected to the bottom of the water inlet cylinder seat, and the other end extends to a drainage area, and the first drainage stop valve is installed on the first drainage pipe.

12. The new submersible axial flow pump apparatus of claim 11, wherein, A second drainage assembly is arranged in the station body, which comprises a second drainage pipe and a second drainage stop valve, one end of the second drainage pipe is connected to the bottom of the water outlet side of the station body, and the other end extends to a drainage area, and the second drainage stop valve is installed on the second drainage pipe.

13. The new submersible axial flow pump apparatus of claim 12, wherein, A scouring assembly is arranged in the station body, which comprises a scouring main pipe, a scouring ring pipe, a plurality of scouring nozzles, and a scouring stop valve, the scouring ring pipe is arranged on the outer circumferential side of the lower part of the water inlet cylinder seat, the plurality of scouring nozzles are installed on the scouring ring pipe in a circumferential interval, the water spraying end of each scouring nozzle enters the water inlet cylinder seat after passing through the water inlet cylinder seat, each scouring nozzle is inclined downward and has a certain horizontal offset, one end of the scouring main pipe is connected to the scouring ring pipe, and the other end is connected to a high-pressure water supply device, and the scouring stop valve is installed on the scouring main pipe.

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