An adaptive centering balancing device for a segmented multi-stage pump

Abstract

This invention discloses an adaptive centering and balancing device for a segmental multistage pump, belonging to the field of multistage pump technology. It includes a submersible motor with a base, and the motor's output shaft is connected to a rotating shaft. A first pipe body is mounted on the base, consisting of several pumping pipes. A balancing assembly is mounted on the first pipe body, including a connecting pipe mounted on the first pipe body. A second pipe body, consisting of several pumping pipes, is mounted on the first connecting pipe. Two water collection covers are fixedly installed inside both the first and second pumping pipes. This invention allows the device to be adjusted according to its operating state. By adding or subtracting the number of first and second pipe bodies, the pumping portion and head of the pump can be changed, improving the device's adaptability.

Description

Technical Field

[0001] This invention relates to the field of multistage pump technology, and more particularly to an adaptive centering and balancing device for segmental multistage pumps. Background Technology

[0002] Multistage pumps are widely used in many fields. Pumps are divided into vertical pumps and horizontal pumps. Horizontal pumps are mostly used on the ground, while vertical pumps are mostly used in deep well operations. Since the diameter of the pump is limited by the diameter of the deep well, vertical pumps are mostly used for downhole operations to pump the liquid in the deep well to the surface.

[0003] Traditional vertical multistage pumps are integrated units, with the motor and pumping body combined into one. This results in a long pump body, causing significant inconvenience for transportation and installation in wells. The pumping section, consisting of several impellers inside the pump body, is where the pump works on the liquid. Within the effective working range, the more impellers there are, the greater the pump head. However, the integrated design of traditional pumps means the pump head is fixed and cannot be adjusted as needed. During operation, the pressure difference on both sides of the impeller is different. One side of the impeller facing the pump body is a low-pressure area, while the other side is a high-pressure area at the outlet. The fact that several impellers are arranged in the same direction inside the pump body generates axial thrust during operation. To eliminate the influence of axial force, traditional vertical pumps have balance holes and balance drums on the impellers. However, the balance holes only make the pump suitable for operation in clean water environments. In the complex water environment of wells, the balance holes will become clogged, greatly reducing its effectiveness. Axial force can also damage various components inside the pump body. Summary of the Invention

[0004] The purpose of this invention is to provide an adaptive centering and balancing device for segmental multistage pumps, in order to solve the problem that the pump body length and head of traditional integrated vertical multistage pumps cannot be adjusted.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adaptive centering and balancing device for a segmental multistage pump includes a submersible motor, a base on which the submersible motor is mounted, and a rotating shaft connected to the output shaft of the submersible motor. A pipe body is mounted on the base, the pipe body being composed of several pumping pipes, and a balancing component is mounted on the pipe body. The balancing component includes a connecting pipe 1 assembled on a pipe body 1, a pipe body 2 installed on the connecting pipe 1, the pipe body 2 consisting of several pumping pipes 2, a connecting pipe 2 installed on the pipe body 2, two water collection covers fixedly installed inside the pumping pipe 1 and the pumping pipe 2, several guide vanes installed on the water collection covers, and an impeller installed inside the water collection covers. The first connecting pipe, the second pumping pipe, and the second connecting pipe are all provided with inlet chambers and outlet chambers. Several inlet chambers form an inlet flow channel, and several outlet chambers form an outlet flow channel. The impellers inside the first and second pipe bodies are arranged in a mirror image along the plane of symmetry of the connecting pipe body, with their inlet facing opposite directions. This makes the axial forces generated by the two pumping parts roughly opposite during operation and they counteract each other inside the pump body, thereby achieving axial force self-balancing.

[0007] As a further description of the above technical solution: Two filter screens are installed on the base, and the water collection cover and impeller are both penetrated by the rotating shaft.

[0008] As a further description of the above technical solution: The second connecting pipe is provided with a second balancing component. The second balancing component includes a third connecting pipe connected to the second connecting pipe. The third connecting pipe has a balancing cavity. The third connecting pipe is equipped with a bearing mechanism. The bearing mechanism is equipped with a connecting mechanism. The connecting mechanism is equipped with a balancing disc. The balancing cavity is equipped with a balancing ring.

[0009] As a further description of the above technical solution: Both the balance disc and the balance ring are equipped with magnets, with the S poles of the two magnets facing each other.

[0010] As a further description of the above technical solution: Water outlet holes are provided on the connecting pipe three, the pumping pipe one, and the base. A drainage cavity is also provided on the connecting pipe three.

[0011] As a further description of the above technical solution: Several water outlets are combined to form a balance pipe, and the outlet positions of the drainage chamber and the water outlet channel are matched.

[0012] As a further description of the above technical solution: The connecting pipe three is equipped with an anti-backflow component, which includes a top pipe connected to the connecting pipe three. A fixing pipe is fixedly installed inside the top pipe, and a piston is slidably arranged on the fixing pipe. A spring is provided between one end of the piston and the fixing pipe.

[0013] As a further description of the above technical solution: A reinforcement assembly is provided between the submersible motor and the jacking pipe. The reinforcement assembly includes two reinforcement rings that are respectively installed on the submersible motor and the jacking pipe, and the two reinforcement rings are connected by several reinforcement components.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By coordinating the balancing components (I, II, anti-backflow, and reinforcement), the operating state of the device can be adjusted according to actual needs. Within the effective working range of the pumping section, the pumping section can be adjusted by adding or subtracting components, thereby adjusting the head of the device. In operating state I, several impellers inside pipe I and pipe II are mirror-image arranged along the symmetrical plane of the connecting pipe I, with their inlet facing opposite directions. This ensures that the axial forces generated by the two pumping sections are roughly opposite and counterbalanced within the pump body, achieving axial force self-balancing. In operating state II, the balancing ring and the balancing... The two opposing magnets facing each other provide repulsive force between the discs, preventing wear on the balance ring and balance disc after prolonged use. The balance pipe, composed of several water outlets, occupies less external space compared to traditional balance pipes, making it more convenient for downhole operations. The balance disc, balance ring, balance pipe, and magnets enable axial force self-balancing in the second operating state. The piston, under the action of the spring, prevents backflow of the liquid. The reinforcing components, together with the reinforcing ring, strengthen the entire device, ensuring its operational stability. Furthermore, the components are detachable, facilitating transportation and downhole installation. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall cross-sectional three-dimensional structure provided according to an embodiment of the present invention is shown; Figure 2 A cross-sectional perspective structural diagram of the base and tube body provided according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of a filter screen provided according to an embodiment of the present invention is shown; Figure 4 A cross-sectional perspective structural diagram of a connecting pipe and a pumping pipe provided according to an embodiment of the present invention is shown; Figure 5 A three-dimensional structural schematic diagram of a water collection hood provided according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of an inlet channel and an outlet channel provided according to an embodiment of the present invention is shown; Figure 7 A cross-sectional three-dimensional structural diagram of the pumping pipe II provided according to an embodiment of the present invention is shown; Figure 8 A cross-sectional perspective view of the device provided according to an embodiment of the present invention in its second usage state is shown. Figure 9 A schematic diagram of the disassembled three-dimensional structure of a portion of the structure provided according to an embodiment of the present invention is shown; Figure 10 A diagram illustrating two magnets provided according to an embodiment of the present invention is shown; Figure 11 A cross-sectional three-dimensional structural diagram of a jacking pipe provided according to an embodiment of the present invention is shown; Figure 12 A three-dimensional structural schematic diagram of a reinforcing ring provided according to an embodiment of the present invention is shown; Figure 13 This diagram illustrates the flow direction of water inside the pump body when the device provided according to an embodiment of the present invention is in use state one. Figure 14 This diagram illustrates the flow direction of water inside the pump body when the device provided according to an embodiment of the present invention is in use state two. Figure 15 The present invention provides an embodiment of the present invention. Figure 14 Enlarged view of point A in the middle; Figure 16 A three-dimensional structural diagram of the device provided according to an embodiment of the present invention in its second usage state is shown; Figure 17 A three-dimensional structural diagram of the device provided according to an embodiment of the present invention in its first usage state is shown.

[0016] Legend: 1. Submersible motor; 2. Base; 3. Shaft; 4. Pipe body one; 5. Balancing assembly one; 6. Balancing assembly two; 7. Anti-backflow assembly; 8. Reinforcing assembly; 51. Connecting pipe one; 52. Pipe body two; 53. Connecting pipe two; 54. Inlet chamber; 55. Outlet chamber; 56. Water collection cover; 57. Guide vane; 58. Impeller; 61. Connecting pipe three; 62. Balancing chamber; 63. Bearing mechanism; 64. Connecting mechanism; 65. Balancing disc; 66. Balancing ring; 67. Magnet; 68. Outlet hole; 69. Drainage chamber; 71. Top pipe; 72. Fixed pipe; 73. Piston; 74. Spring; 81. Reinforcing ring; 82. Reinforcing component. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] like Figure 1 - Figure 17 As shown, the present invention provides: An adaptive centering and balancing device for a segmental multistage pump includes a submersible motor 1, a base 2 mounted on the submersible motor 1, and a rotating shaft 3 connected to the output shaft of the submersible motor 1. A pipe body 4 is mounted on the base 2, and the pipe body 4 is composed of several pumping pipes. Two water collection covers 56 are fixedly installed inside the pumping pipes. Several guide vanes 57 are installed on the water collection covers 56, and an impeller 58 is installed inside the water collection covers 56. Two filter screens are installed on the base 2.

[0019] Specifically, two adjacent pumping pipes are connected by a connector. One of the pumping pipes is connected to the base 2 by the connector. Under the action of the submersible motor 1, the shaft 3 rotates with several impellers 58, so that the liquid enters the base 2 through the filter screen and gradually flows into the pipe body 4. The impellers 58, the water collection cover 56 and the guide vane 57 work together to perform work. The pipe body 4 is the pumping part of the pump body.

[0020] like Figure 1 , Figures 4-7 , Figure 13 as well as Figure 17 As shown, in order to solve the problem of the device being able to achieve self-balancing, a balancing component 5 is provided on the tube body 4; The balancing assembly 5 includes a connecting pipe 51 mounted on a pipe body 4. A pipe body 52 is installed on the connecting pipe 51. The pipe body 52 consists of several pumping pipes 53. A connecting pipe 53 is installed on the pipe body 52. ​​Two water collecting covers 56 are fixedly installed inside the pumping pipes 53. Several guide vanes 57 are installed on the water collecting covers 56, and an impeller 58 is installed inside the water collecting covers 56. Water inlets are provided on the connecting pipe 51, the pumping pipes 52, and the connecting pipes 53. The inlet chamber 54 and outlet chamber 55 are formed by several inlet chambers 54 and several outlet chambers 55. Several impellers 58 inside the first pipe body 4 and the second pipe body 52 are arranged in a mirror image along the symmetry plane of the connecting pipe 51. The suction ports of the impellers 58 face opposite directions, so that the axial forces generated by the two pumping parts during operation are roughly opposite and are counter-forced inside the pump body, thereby achieving axial force self-balancing. The water collection cover 56 and the impellers 58 are both penetrated by the rotating shaft 3.

[0021] Specifically, connecting pipe 1 51 is connected to one of the pumping pipes 1 of pipe body 4 via a connector. One of the pumping pipes 2 in pipe body 2 52 is connected to connecting pipe 1 51 via a connector. Two adjacent pumping pipes 2 are also connected via connectors. Connecting pipe 2 53 is connected to the top pumping pipe 2 of pipe body 2 52 via a connector. The inlet channel allows the liquid in pipe body 4 to enter pipe body 2 52 to do work, and the outlet channel allows the liquid in pipe body 2 52 to be sent to the next level area to flow away.

[0022] When the submersible motor 1 starts, the liquid is drawn into the first pipe 4 under the action of the impeller 58 and does work. Then the liquid enters the second pipe 52 through the inlet channel and does work, and finally flows out through the outlet channel. Since the impeller 58 in the first pipe 4 is in a low-pressure area on one side facing the suction port (i.e., towards the base 2) and the outlet on the other side is in a high-pressure area when it is working, an axial thrust is formed from the high-pressure area to the low-pressure area. When the impeller 58 in the second pipe 52 is working, the high and low pressure areas on both sides are completely opposite to those in the first pipe 4. Therefore, the axial thrust generated by the second pipe 52 is exactly opposite to the axial thrust of the first pipe 4. The two pumping parts are mirror images of each other along the symmetrical plane of the connecting pipe 51, and their suction ports face completely opposite directions. Therefore, the axial forces generated by the impellers 58 in the two pumping parts are completely opposite. The axial thrust of the two pumping parts is counteracted inside the pump body to achieve self-balance of the axial force.

[0023] like Figure 1 , Figures 8-10 , Figures 14-16 As shown, in order to solve the problem of axial force caused by the fact that several impellers 58 inside the pump body are oriented on the same side when the device is in use state two, a balancing component 6 is provided on the connecting pipe 2 53. The second balancing component 6 includes a third balancing pipe 61 connected to the second balancing pipe 53. The third balancing pipe 61 has a balancing cavity 62. A bearing mechanism 63 is installed on the third balancing pipe 61. A connecting mechanism 64 is provided on the bearing mechanism 63. A balancing disc 65 is installed on the connecting mechanism 64. A balancing ring 66 is installed inside the balancing cavity 62. Magnets 67 are provided on both the balancing disc 65 and the balancing ring 66. The S poles of the two magnets 67 are arranged face to face. Water outlet holes 68 are provided on the third balancing pipe 61, the first pumping pipe, and the base 2. A drain cavity 69 is also provided on the third balancing pipe 61. Several water outlet holes 68 are combined to form a balancing pipe, and the drain cavity 69 matches the outlet position of the water flow channel.

[0024] For details, please refer to Figure 1 Connecting pipe 3 61 is installed on connecting pipe 2 53 via a connector. When the device is in operating state 1, the balancing component 2 6 acts as a liquid guide, guiding the direction of the liquid. (Refer to...) Figures 8-10 , Figures 14-16When the pump body experiences severe wear on its internal components during prolonged use in operating state one, the axial forces generated by the two pumping sections cannot achieve the ideal counterbalancing effect within the pump body, preventing self-balancing of the axial forces. In this case, connecting pipe 1 (51), pipe body 2 (52), and connecting pipe 2 (53) can be removed, and connecting pipe 3 (61) can be directly connected to pipe body 1 (4). One end of the rotating shaft 3 is inserted into the connecting mechanism 64, which consists of a top plate and a bearing. The top plate is fixed to connecting pipe 3 (61) with screws. The bearing of the connecting mechanism 64, carrying a balance disc 65, can rotate synchronously with the rotating shaft 3 when the submersible motor 1 starts, while the balance ring 66 remains stationary. At this point, the pump body enters operating state two, the balance component 1 (5) ceases to function, and the balance component 2 (6) changes from the original guide pipe to a device that realizes axial force... A crucial part of the self-balancing mechanism involves the liquid being powered by the submersible motor 1, with each impeller 58 performing work in stages. The liquid enters the pipe body 4. Since the outlet of the final impeller 58 is in a high-pressure area, most of the liquid is discharged through the drain chamber 69 of the connecting pipe 3 61. A small portion of the liquid passes through the balance ring 66 and enters the balance chamber 62 of the connecting pipe 3 61. Then, it is discharged into the low-pressure water inlet in the base 2 through a balance pipe formed by several outlet holes 68, achieving axial force self-balancing. Due to the impact of the pump body during start-up and shutdown, as well as the abrasive effect of particles in the liquid on the balance disc 65 and balance ring 66, prolonged use can cause them to gradually stick together and become stuck. Two magnets 67 with the same pole facing each other are set up to provide a repulsive force to the balance disc 65 and balance ring 66 in advance, thus resolving the impact on the balance disc 65 and balance ring 66 during start-up and shutdown.

[0025] like Figure 1 , Figure 11 As shown, in order to solve the problem of liquid backflow, an anti-backflow component 7 is installed on the connecting pipe 61; The anti-backflow assembly 7 includes a top pipe 71 connected to the connecting pipe 3 61. A fixing pipe 72 is fixedly installed inside the top pipe 71. A piston 73 is slidably arranged on the fixing pipe 72, and a spring 74 is arranged between one end of the piston 73 and the fixing pipe 72.

[0026] Specifically, the liquid impacts the piston 73 under the action of the impellers 58 at each stage, causing it to move upward. The spring 74 is compressed during this process. After the liquid passes through, it flows out along the inner wall of the top tube 71. When the impact force on the spring 74 decreases, it rebounds, causing the piston 73 to move downward to prevent the liquid from flowing back.

[0027] like Figure 12 , Figures 16-17 As shown, in order to solve the problem of stability of the device when working in a deep well, a reinforcement component 8 is provided between the submersible motor 1 and the jacking pipe 71; The reinforcement component 8 includes two reinforcement rings 81 mounted on the submersible motor 1 and the jacking pipe 71, and the two reinforcement rings 81 are connected by a number of reinforcement parts 82.

[0028] Specifically, connecting the two reinforcing rings 81 with several reinforcing members 82 further pressurizes the various components of the device, enhancing its operational stability and making it more stable during downhole operation. Furthermore, the reinforcing members 82 can be replaced in different lengths depending on the device's configuration; see reference [link / reference needed] for details. Figure 16 , Figure 17 The reinforcement component 82 consists of a nut and a reinforcing rod.

[0029] Working principle: Figure 1 , Figure 17 The initial state of the device is the first state of use. In this state, the axial forces generated by the two pumping parts inside the pump body are opposed to each other, and the balancing component 26 in this state acts as a transition guide section for the water flow and does not affect the axial force.

[0030] Figure 8 , Figure 16 This is the second operating state of the device. In this state, the several impellers 58 inside the pump body are facing the same direction, and the balance pipe composed of several water outlet holes 68 can reintroduce the high-pressure liquid from the final impeller 58 to the low-pressure water inlet of the base 2.

[0031] An external pipeline can be connected to the jacking pipe 71 to guide and transport the liquid.

[0032] Operating State 1: When the submersible motor 1 starts, the liquid is drawn into pipe body 4 by the impeller 58 to do work. Then, the liquid enters pipe body 2 52 through the inlet channel to do work, and then enters the drain chamber 69 of connecting pipe 3 61 through the outlet channel, then flows into the top pipe 71, and finally flows into the internal pipe of the external connection. Because the area facing the suction port (i.e., towards the base 2) on one side of the impeller 58 in pipe body 4 is at low pressure when it is working, while the outlet on the other side of the impeller 58 is at high pressure, a pressure difference is formed from the high-pressure area. The axial thrust is directed towards the low-pressure area. When the impeller 58 in pipe body 2 52 is working, the high and low pressure areas on both sides are completely opposite to those in pipe body 1 4. Therefore, the axial thrust generated by pipe body 2 52 is exactly opposite to that of pipe body 1 4. The two pumping sections are mirror images of each other along the symmetrical plane of connecting pipe 1 51, and their suction inlets face completely opposite directions. Therefore, the axial forces generated by the impellers 58 in the two pumping sections are completely opposite. The axial thrust of the two pumping sections is counteracted inside the pump body to achieve self-balance of the axial force.

[0033] The flow of the liquid can be used as a reference for the current usage status. Figure 13 External liquid → filter screen of base 2 → pipe body 1 4 → water inlet channel → pipe body 2 52 → water outlet channel → drain chamber 69 → top pipe 71 → external pipe.

[0034] Operating State Two: When the pump body experiences severe wear on its internal components after prolonged use in Operating State One, the axial forces generated by the two pumping sections may not achieve ideal counterbalancing within the pump body, preventing self-balancing of the axial forces. In this case, connecting pipe 1 (51), pipe body 2 (52), and connecting pipe 2 (53) can be removed. Then, connecting pipe 3 (61) can be directly connected to pipe body 1 (4). One end of the rotating shaft 3 can be inserted into the connecting mechanism 64, which consists of a top plate and a bearing. The top plate is fixed to connecting pipe 3 (61) with screws. The bearing of the connecting mechanism 64, carrying the balance disc 65, can rotate synchronously with the rotating shaft 3 when the submersible motor 1 starts, while the balance ring 66 remains stationary. At this point, the pump body enters Operating State Two, and the balance component 1 (5) ceases to function. The balance component 2 (6), which was originally a guide pipe, becomes an important component for achieving self-balancing of the axial forces. In part, under the action of the submersible motor 1, the liquid is worked by each impeller 58 in stages, and the liquid enters the pipe body 4. Since the outlet of the last impeller 58 is a high-pressure area, most of the liquid is discharged into the top pipe 71 through the drain chamber 69 of the connecting pipe 3 61, and finally flows into the interior of the external pipe. A small part of the liquid passes through the balance ring 66 and enters the balance chamber 62 of the connecting pipe 3 61, and then is discharged into the low-pressure water inlet in the base 2 through the balance pipe formed by several water outlet holes 68 to achieve axial force self-balancing. Due to the impact of the pump body on the balance disc 65 and the balance ring 66 during each start-up and shutdown, as well as the grinding of particles in the liquid, the two will gradually stick together and cause jamming after long-term use. The two magnets 67 with the same pole facing each other are set to provide a repulsive force to the balance disc 65 and the balance ring 66 in advance to solve the impact on the balance disc 65 and the balance ring 66 during start-up and shutdown.

[0035] The direction of the liquid can be referenced when using state two. Figures 14-15 Specifically, it can be divided into two flow directions.

[0036] Flow direction 1: External liquid → filter screen of base 2 → pipe body 4 → drain chamber 69 → top pipe 71 → external pipe.

[0037] Flow direction 2: External liquid → filter screen of base 2 → high pressure outlet of final impeller 58 in pipe body 4 → balance chamber 62 → balance pipe → low pressure inlet of base 2.

[0038] refer to Figure 17 In operating state one, within the effective working range of the pumping section, the device can automatically increase or decrease the number of pipes 4, thereby adjusting the length and head of the device. Furthermore, refer to... Figure 16 When using state two, the device can also increase or decrease the number of pipes 4 within the effective working range of the pumping section, thereby adjusting the length and head of the device.

[0039] The various modules of the device can be installed and disassembled using connectors, which facilitates the transportation and downhole installation of the device.

[0040] The connecting parts mentioned above consist of bolts, nuts and washers, and a sealing gasket is provided between two adjacent parts to ensure a sealing effect. The rotating shaft 3 can be replaced as needed when the device is in use state one and use state two.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adaptive centering balancing device for a sectional multi-stage pump, comprising a submersible motor (1), a base (2) is arranged on the submersible motor (1), and a rotating shaft (3) is connected to an output shaft of the submersible motor (1), a pipe body one (4) is arranged on the base (2), the pipe body one (4) is composed of a plurality of pumping pipes one, characterized in that: A balancing component (5) is provided on the tube body (4); The balancing component 1 (5) includes a connecting pipe 1 (51) assembled on a pipe body 1 (4), a pipe body 2 (52) installed on the connecting pipe 1 (51), the pipe body 2 (52) is composed of several pumping pipes 2, a connecting pipe 2 (53) is installed on the pipe body 2 (52), two water collection covers (56) are fixedly installed inside the pumping pipe 1 and the pumping pipe 2, several guide vanes (57) are installed on the water collection cover (56), and an impeller (58) is installed inside the water collection cover (56); The first connecting pipe (51), the second pumping pipe, and the second connecting pipe (53) are all provided with an inlet chamber (54) and an outlet chamber (55). Several inlet chambers (54) form an inlet flow channel, and several outlet chambers (55) form an outlet flow channel. The impellers (58) inside the first pipe body (4) and the second pipe body (52) are arranged in a mirror image along the symmetry plane of the first connecting pipe (51). The suction ports of the impellers (58) face opposite directions, so that the axial forces generated by the two pumping parts during operation are roughly opposite and are counterbalanced inside the pump body, thereby achieving axial force self-balancing.

2. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 1, characterized in that, Two filter screens are installed on the base (2), and the water collection cover (56) and impeller (58) are both penetrated by the rotating shaft (3).

3. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 1, characterized in that, The second connecting pipe (53) is provided with a second balancing component (6), the second balancing component (6) includes a third connecting pipe (61) connected to the second connecting pipe (53), the third connecting pipe (61) is provided with a balancing cavity (62), the third connecting pipe (61) is provided with a bearing mechanism (63), the bearing mechanism (63) is provided with a connecting mechanism (64), the connecting mechanism (64) is provided with a balancing disc (65), and a balancing ring (66) is installed inside the balancing cavity (62).

4. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 3, characterized in that, Magnets (67) are provided on both the balance disc (65) and the balance ring (66), with the S poles of the two magnets (67) facing each other.

5. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 3, wherein, Water outlet holes (68) are provided on the three connecting pipes (61), the pumping pipe (1) and the base (2), and a drain cavity (69) is also provided on the three connecting pipes (61).

6. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 5, characterized in that, Several water outlets (68) are combined to form a balance pipe, and the outlet positions of the drain chamber (69) and the water outlet channel are matched.

7. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 3, wherein, The connecting pipe three (61) is provided with an anti-backflow component (7). The anti-backflow component (7) includes a top pipe (71) connected to the connecting pipe three (61). A fixing pipe (72) is fixedly installed inside the top pipe (71). A piston (73) is slidably provided on the fixing pipe (72), and a spring (74) is provided between one end of the piston (73) and the fixing pipe (72).

8. An adaptive centering and balancing device for a segmented multi-stage pump according to claim 7, characterized in that, A reinforcement assembly (8) is provided between the submersible motor (1) and the jacking pipe (71). The reinforcement assembly (8) includes two reinforcement rings (81) installed on the submersible motor (1) and the jacking pipe (71). The two reinforcement rings (81) are connected by a number of reinforcement parts (82).

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