A submersible pump for deep-sea mining

Abstract

The present invention relates to the technical field of submersible pumps, specifically a submersible pump for deep-sea mining, comprising a motor protection shell fixedly installed inside a pump casing, and a conveying flow channel formed between the motor protection shell and the pump casing, the conveying flow channel comprising a first flow channel and a second flow channel, a discharge end being provided at the top of the pump casing, and an inlet end being provided at the bottom of the pump casing, a separation chamber being provided in the inlet end, and an ore separation unit being provided in the separation chamber; compared with the prior art, the present invention can realize the diversion and conveying of large-particle ore and small-particle ore entering the submersible pump by arranging an ore separation unit and a first flow channel and a second flow channel of the conveying flow channel on the inlet end of the pump casing, thereby avoiding the mutual extrusion and mixed conveying of large-particle ore and small-particle ore, and further avoiding the damage of the impeller and the inner wall of the pump caused by the mixed particles during conveying, thereby effectively improving the durability of the submersible pump and its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of submersible pumps, in particular to a submersible pump for deep-sea mining. Background Art

[0002] The most common deep-sea mineral resource development system currently is the hydraulic lift mining system, which uses seabed ore collection vehicles to collect ore. Submersible mixed-flow pumps then lift the ore via pipelines to surface mining vessels. The submersible mixed-flow pump provides power for the entire conveying system and is a key component of the hydraulic lift mining system.

[0003] In the prior art, the mixed flow submersible pump targets solid-liquid two-phase fluid, and the slip velocity between the particle phase of ore and the liquid phase is relatively large, especially the slip velocity between large particles of ore and small particles of ore. The movement trajectory of large particles and small particles in the guide vane is close to the wall surface of the guide vane, and the wear between the large particles and the guide vane surface is very serious. If the large particles and small particles cannot be separated, the two will continue to squeeze, and the sharp corners on the surface of the small particles will cause great damage to the surface of the impeller and the inner wall surface of the pump, thereby causing damage to the impeller and the inner wall surface of the pump and reducing its service life. For this reason, the present invention proposes a submersible pump for deep-sea mining. Summary of the Invention

[0004] The object of the present invention is to provide a submersible pump for deep-sea mining to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a submersible pump for deep-sea mining, comprising a motor protection shell fixedly installed inside a pump casing, and a conveying flow channel formed between the motor protection shell and the pump casing, the conveying flow channel comprising a first flow channel and a second flow channel, a discharge end being provided at the top of the pump casing, an inlet end being provided at the bottom of the pump casing, a separation chamber being provided in the inlet end, and an ore separation unit being provided in the separation chamber.

[0006] As a preferred technical solution of the present invention, a submersible motor is provided inside the motor protection shell, and a drive shaft is provided on the submersible motor, and an impeller is fixedly mounted on the upper end of the drive shaft.

[0007] As a preferred technical solution of the present invention, the ore separation unit includes a linkage shaft fixed to the lower end of the drive shaft, and a horizontally arranged pressure plate is fixedly connected to the linkage shaft, and a fixed baffle and a small particle filter plate movably connected to the inlet end are provided below the pressure plate.

[0008] As a preferred technical solution of the present invention, an isolation block is provided on the upper surface of the small particle filter plate, and the upper surface of the isolation block is a flat surface, and one side of the isolation block is a curved surface.

[0009] As a preferred technical solution of the present invention, the fixed baffle is horizontally arranged, and when the pressure plate is not in contact with the isolation block, the small particle filter plate and the fixed baffle are located on the same horizontal plane; when the lower surface of the pressure plate is in contact with the flat surface of the isolation block, the small particle filter plate is in a non-horizontal position.

[0010] As a preferred technical solution of the present invention, a movable inner cavity is opened on one side of the interior of the isolation block, and a movable baffle is slidably installed in the movable inner cavity through a compression spring.

[0011] As a preferred technical solution of the present invention, the movable baffle is a curved surface structure.

[0012] As a preferred technical solution of the present invention, the small particle filter plate is movably hinged on the inner wall of the inlet end, and the bottom of the small particle filter plate is connected to a reset spring, and the other end of the reset spring is installed on the inner wall of the inlet end.

[0013] The outer surface movable sleeve of the linkage shaft is provided with a flow guide seat.

[0014] A limiting strip is provided on the top of one side of the fixed baffle close to the small particle filter plate, and a groove adapted to the limiting strip is provided on one side of the lower surface of the small particle filter plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] A submersible pump for deep-sea mining of the present invention can realize the diversion and transportation of large-particle ore and small-particle ore entering the submersible pump by arranging an ore separation unit and a first flow channel and a second flow channel of the conveying flow channel on the inlet end of the pump casing, thereby avoiding the mutual squeezing and mixing of large-particle and small-particle ore during transportation, and further avoiding the damage to the impeller and the inner wall of the pump caused by the mixed particles during transportation, effectively improving the durability of the submersible pump and extending its service life.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the middle part;

[0020] Figure 3 For the present invention Figure 2 A schematic diagram of the structure when the pressure plate and the isolation block are separated;

[0021] Figure 4Schematic diagram of the connection structure of the isolation block when the pressure plate and the isolation block are separated;

[0022] Figure 5 This is a schematic diagram of the connection structure when the pressure plate of the present invention is located above the isolation block;

[0023] In the figure: 1. Pump casing; 2. Discharge end; 3. Inlet end; 4. Motor protection casing; 5. Submersible motor; 6. Conveying flow channel; 61. First flow channel; 62. Second flow channel; 7. Impeller; 8. Ore separation unit; 9. Drive shaft; 10. Linkage shaft; 11. Pressure plate; 12. Fixed baffle; 13. Small particle filter plate; 14. Isolation block; 141. Arc surface; 142. Flat surface; 15. Movable inner cavity; 16. Compression spring; 17. Movable baffle; 18. Return spring; 19. Guide seat; 20. Limiting strip; 21. Liquid inlet; 22. Liquid outlet. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] See also Figure 1-5In this embodiment, a submersible pump for deep-sea mining is provided, including a motor protection shell 4 fixedly installed inside a pump casing 1, and a conveying flow channel 6 is formed between the motor protection shell 4 and the pump casing 1, and the conveying flow channel 6 includes a first flow channel 61 and a second flow channel 62. A discharge end 2 is provided at the top of the pump casing 1, and an inlet end 3 is provided at the bottom of the pump casing 1. A separation chamber is provided in the inlet end 3, and an ore separation unit 8 is provided in the separation chamber. A submersible motor 5 is provided inside the motor protection shell 4, and a drive shaft 9 is provided on the submersible motor 5. An impeller 7 is fixedly installed on the upper end of the drive shaft 9, and an arc guide groove is provided on the impeller 7 for conveying granular ore.

[0028] When the submersible motor 5 is running, it can drive the drive shaft 9 and the impeller 7 to rotate, and can generate negative pressure on the conveying channel 6 below, so that seawater and ore particles enter the separation chamber of the submersible pump through the liquid inlet 21 of the inlet end 3. By using the ore separation unit 8, large particles and small particles of ore in the mixed slurry can be separated and conveyed, so that large particles and small particles of ore are respectively conveyed upward through the first flow channel 61 and the second flow channel 62, thereby avoiding scratches on the inner wall of the pump and the arc guide groove of the impeller due to the different moving speeds of large particles and small particles of ore and their mutual squeezing when conveying the mixed slurry.

[0029] The ore separation unit 8 includes a linkage shaft 10 fixed to the lower end of the drive shaft 9, and a guide seat 19 is movably provided on the outer surface of the linkage shaft 10, and a horizontally arranged pressure plate 11 is fixedly connected to the linkage shaft 10, and a fixed baffle 12 and a small particle filter plate 13 movably connected to the inlet end 3 are provided below the pressure plate 11. The upper surface of the small particle filter plate 13 is provided with an isolation block 14, and the upper surface of the isolation block 14 is a flat surface 142, and one side of the isolation block 14 is an arc-shaped surface 141. The small particle filter plate 13 is movably hinged on the inner wall of the inlet end 3, and the bottom of the small particle filter plate 13 is connected to a reset spring 18, and the other end of the reset spring 18 is installed on the inner wall of the inlet end 3.

[0030] When the driving shaft 9 rotates, it can drive the linkage shaft 10 to rotate synchronously, and the rotating linkage shaft 10 can drive the pressure plate 11 to rotate synchronously. A limiting strip 20 is provided on the top of the fixed baffle 12 close to the small particle filter plate 13, and a groove adapted to the limiting strip 20 is provided on one side of the lower surface of the small particle filter plate 13. The fixed baffle 12 is arranged horizontally. When the pressure plate 11 rotates to the top of the fixed baffle 12, the pressure plate 11 and the isolation block 14 are not in contact with each other, so that the small particle filter plate 13 can be located on the same horizontal plane as the fixed baffle 12 under the action of the return spring 18, so that the flow channel there can be blocked, and small particles of ore can pass through the filter holes on the small particle filter plate 13 and be transported upward through the first flow channel 61, while large particles of ore are temporarily intercepted;

[0031] When the pressure plate 11 rotates to the top of the small particle filter plate 13, it first contacts the arc surface 141 of the pressure plate 11 and the isolation block 14. Under the action of the arc surface 141, the isolation block 14 and the small particle filter plate 13 can be pressed down synchronously. When the lower surface of the pressure plate 11 contacts the flat surface 142 of the isolation block 14, the small particle filter plate 13 is in a non-horizontal position, so that an opening can be formed between the small particle filter plate 13 and the fixed baffle 12, so that large particles of ore can pass through the opening. Through the opening, a movable inner cavity 15 is opened on one side of the interior of the isolation block 14, and a movable baffle 17 is slidably installed in the movable inner cavity 15 through a compression spring 16. The movable baffle 17 is an arc-shaped surface structure, which can make the pressure plate 11, the isolation block 14, the movable baffle 17 and the small particle filter plate 13 form a limiting guide structure, so that the large particle ore is transported to the top of the fixed baffle 12, and finally transported to the impeller 7 through the second flow channel 62, and finally discharged through the liquid outlet 22 of the discharge end 2.

[0032] It is worth noting that the entire device is controlled by a master control button. Since the devices matched with the control button are commonly used devices and belong to existing mature technologies, their electrical connection relationships and specific circuit structures will not be described in detail here.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A submersible pump for deep sea mining, characterized in that: A motor protection shell (4) is fixedly installed inside a pump shell (1), and a conveying flow channel (6) is formed between the motor protection shell (4) and the pump shell (1), the conveying flow channel (6) including a first flow channel (61) and a second flow channel (62), a discharge end (2) is provided at the top of the pump shell (1), an inlet end (3) is provided at the bottom of the pump shell (1), a separation chamber is provided in the inlet end (3), and an ore separation unit (8) is provided in the separation chamber; A submersible motor (5) is provided inside the motor protection housing (4), and a drive shaft (9) is provided on the submersible motor (5), and an impeller (7) is fixedly mounted on the upper end of the drive shaft (9); The ore separation unit (8) includes a linkage shaft (10) fixed to the lower end of the drive shaft (9), and a horizontally arranged pressure plate (11) is fixedly connected to the linkage shaft (10), and a fixed baffle (12) and a small particle filter plate (13) movably connected to the inlet end (3) are provided below the pressure plate (11); An isolation block (14) is provided on the upper surface of the small particle filter plate (13), and the upper surface of the isolation block (14) is a flat surface (142), and one side of the isolation block (14) is a curved surface (141); The fixed baffle (12) is arranged horizontally, and when the pressure plate (11) is not in contact with the isolation block (14), the small particle filter plate (13) and the fixed baffle (12) are located on the same horizontal plane; when the lower surface of the pressure plate (11) is in contact with the flat surface (142) of the isolation block (14), the small particle filter plate (13) is in a non-horizontal position; A movable inner cavity (15) is provided on one side of the interior of the isolation block (14), and a movable baffle (17) is slidably mounted in the movable inner cavity (15) via a compression spring (16); The movable baffle (17) is a curved surface structure; The small particle filter plate (13) is movably hinged on the inner wall of the inlet end (3), and a return spring (18) is connected to the bottom of the small particle filter plate (13), and the other end of the return spring (18) is mounted on the inner wall of the inlet end (3); A limiting strip (20) is provided on the top of one side of the fixed baffle (12) close to the small particle filter plate (13), and a groove adapted to the limiting strip (20) is provided on one side of the lower surface of the small particle filter plate (13).

2. A submersible pump for deep sea mining according to claim 1, characterized in that: A flow guide seat (19) is provided on the outer surface of the linkage shaft (10).

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