A marine multistage self-priming centrifugal pump

Abstract

This invention provides a marine multi-stage self-priming centrifugal pump, comprising: a first motor, a pump casing fixedly connected to the outer surface of the first motor, a centrifugal chamber disposed inside the pump casing, an impeller fixedly connected to the output end of the first motor via a bearing, an inlet groove evenly disposed near the impeller in the centrifugal chamber, and an outlet port fixedly connected to the pump casing near the inlet groove. The outlet port can be connected to a pipeline to facilitate the liquid entering other marine devices. It also includes: an adaptive flow channel unit for suppressing turbulence and vortices in the water flowing into the centrifugal chamber, and an isolation unit for removing impurities from the water flowing into the adaptive flow channel unit. The first motor drives the bearing and impeller to rotate, propelling the liquid in a circular motion along with the impeller. Under the action of centrifugal force, the liquid is thrown towards the edge of the impeller and enters the inlet groove inside the pump casing, ultimately entering the outlet port.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, and in particular to a marine multistage self-priming centrifugal pump. Background Technology

[0002] Marine multistage self-priming centrifugal pumps play a crucial role in ship operation. However, long-term practical observation and research have revealed a significant drawback in existing marine multistage self-priming centrifugal pumps: when a ship encounters complex sea conditions, such as significant rolling or pitching, the flow state of the liquid inside the pump is severely disturbed. Traditional centrifugal pump internal flow channel designs are mostly based on stable operating conditions. When the ship's attitude changes drastically, the liquid inside the pump is prone to unstable flow phenomena such as turbulence and vortices. This not only greatly reduces the pump's self-priming efficiency and prolongs the self-priming time, but may also lead to abnormal local pressure fluctuations in the pump body, causing additional impact and wear on key pump components such as the impeller and pump casing, thereby significantly shortening the pump's service life. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that when a ship encounters complex sea conditions (such as large rolling and pitching), the liquid flow state inside the pump is severely disturbed, and unstable flow phenomena such as turbulence and vortex are easily generated. The invention provides a marine multi-stage self-priming centrifugal pump.

[0004] The technical solution adopted by this invention to solve its technical problem is: a marine multi-stage self-priming centrifugal pump, comprising: a first motor, a pump casing fixedly connected to the outer surface of the first motor, a centrifugal chamber provided inside the pump casing, an impeller fixedly connected to the output end of the first motor via a bearing, a sealing ring fixedly connected inside the centrifugal chamber, liquid inlet grooves evenly arranged near the impeller in the centrifugal chamber, and a liquid outlet port fixedly connected to the pump casing near the liquid inlet groove, and further comprising:

[0005] An adaptive flow channel unit that suppresses turbulence and vortices in the water flowing into the centrifuge chamber; and an isolation unit that removes impurities from the water flowing into the adaptive flow channel unit.

[0006] The adaptive flow channel unit includes an adjustment pipe that is connected to the centrifuge chamber, and a flow guiding mechanism is also provided inside the adjustment pipe.

[0007] The adaptive flow channel unit also includes a first support plate, and a controller is fixedly connected to the top of the first support plate. The controller is equipped with autonomously controlled drive motors, the output end of which is connected to the top of the flow guiding mechanism. A receiver is also fixedly connected to the outer surface of the controller.

[0008] When the liquid flow is turbulent, the controller drives the drive motor to work and drives the flow guiding mechanism to change its shape, thereby suppressing the generation of turbulence and vortices.

[0009] Furthermore, one end of the adjusting pipe is fixedly connected to the outer surface of the sealing ring, and the outer surface of the first support plate is fixedly connected to the outer surface of the sealing ring.

[0010] Furthermore, the flow guiding mechanism includes a first rotating shaft, a flow guiding plate is fixedly connected to the bottom of the first rotating shaft, streamline angles that reduce fluid stress are provided at both ends of the flow guiding plate, a pressure sensor is fixedly connected to the outer surface of the flow guiding plate, pressure module plates are uniformly provided on the water-facing surface of the pressure sensor, and pressure relief mechanisms are uniformly provided on the outer surface of the streamline angles.

[0011] Furthermore, the top of the first rotating shaft is fixedly connected to the output end of the drive motor, and a water-proof material is provided between the outer surface of the first rotating shaft and the regulating pipe.

[0012] Furthermore, the pressure relief mechanism includes a first arc block, the bottom of which is fixedly connected to a miniature electric cylinder, and piston isolation plates are evenly arranged at the output end of the miniature electric cylinder;

[0013] The pressure relief mechanism also includes a second motor, the output end of which is fixedly connected to a second rotating shaft, and the outer surface of the second rotating shaft is fixedly connected to a flow guide channel.

[0014] A water outlet plate is fixedly connected to the side of the guide plate away from the pressure sensor. A second arc block is fixedly connected to the outer surface of the water outlet plate. Channels are provided on the second arc block and the first arc block.

[0015] Furthermore, the outer surface of the first arc block is fixedly connected to the outer surface of the streamline angle, and the outer surface of the second motor is fixedly connected to the top of the guide plate.

[0016] Furthermore, the channels on the second arc block and the first arc block correspond to each other around the guide plate in sequence, and water enters the first arc plate, the guide channel, the second arc plate in sequence and finally flows out from the outlet plate.

[0017] Furthermore, the isolation unit includes a cleaning pipe, which is located on the side of the regulating pipe away from the sealing ring. A water inlet pipe is fixedly connected to the outer surface of the cleaning pipe. A sensor for detecting liquid flow rate and pressure parameters is installed inside the water inlet pipe. A telescopic rod is fixedly connected to the outer surface of the cleaning pipe. A second support plate is fixedly connected to the output end of the telescopic rod. A support rod is fixedly connected to the outer surface of the second support plate. A filter plate is fixedly connected to the end of the support rod away from the second support plate. A sealing plate is also fixedly connected to the outer surface of the support rod. A water-proof layer is fixedly connected to the outer surface of the sealing plate. A cleaning assembly is provided on the support rod located between the filter plate and the sealing plate.

[0018] Furthermore, the outer surface of the impurity removal pipe is fixedly connected to the side of the regulating pipe away from the sealing ring, the filter plate is located at the notch of the impurity removal pipe near the sealing ring, and the sealing plate is located at the notch of the impurity removal pipe near the telescopic rod.

[0019] Furthermore, the cleaning assembly includes a first rotating block, a scraping plate is fixedly connected to the outer surface of the first rotating block, a connecting post is also fixedly connected to the outer surface of the first rotating block, a second rotating block is fixedly connected to the connecting post away from the outer surface of the first rotating block, and a force-bearing plate is fixedly connected to the outer surface of the second rotating block.

[0020] Furthermore, the inner wall of the first rotating block is rotatably connected to the outer surface of the support rod, the inner wall of the second rotating block is rotatably connected to the inner wall of the support rod, and the outer surface of the scraping plate is in contact with the outer surface of the filter plate.

[0021] The beneficial effects of the marine multistage self-priming centrifugal pump provided by this invention are as follows:

[0022] (1) Adaptive flow channel unit: By setting a guide plate that can automatically adjust the angle according to the liquid flow state, when the ship is sailing smoothly, the guide plate is at the optimized normal angle to ensure the efficient operation of the pump. When the ship is rocking, the guide plate is controlled to rotate to a suitable angle to guide the liquid to flow in an orderly manner and effectively suppress the generation of turbulence and vortex.

[0023] (2) Pressure relief mechanism: When the angle of the guide plate is changed, an instantaneous pressure difference will be formed between the front and rear edges of the guide plate, which may generate new eddies or "dead water zones" in the flow channel, which will increase the flow resistance and cause the pump efficiency to drop temporarily. The increase in stress will also cause the angle of the guide plate to change. The pressure relief mechanism will increase the flow channel at the corresponding angle according to the tilt angle of the guide plate to avoid the generation of eddies and rigid damage from instantaneous impact.

[0024] (3) Before entering the adaptive flow channel unit, the water body will first enter the isolation unit to remove impurities in the water body and prevent impurities from adhering to the flow guiding mechanism, affecting the working accuracy of the flow guiding mechanism and clogging the pressure relief mechanism. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural schematic diagram of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0026] Figure 2 This is a structural cross-sectional view of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0027] Figure 3 This is a schematic diagram showing the position of the inlet tank of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0028] Figure 4 This is a schematic diagram of the adaptive flow channel unit of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0029] Figure 5 This is a structural cross-sectional view of the flow guiding mechanism of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the pressure-reducing mechanism of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0031] Figure 7 This is a schematic diagram of the pressure-reducing mechanism of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0032] Figure 8 This is a schematic diagram of the isolation unit of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0033] Figure 9 This is a structural cross-sectional view of the isolation unit of a marine multi-stage self-priming centrifugal pump provided by the present invention;

[0034] Figure 10 This is a schematic diagram of the cleaning component of a marine multi-stage self-priming centrifugal pump provided by the present invention.

[0035] In the diagram: 1. First motor; 2. First fixed frame; 3. Pump casing; 4. Centrifuge chamber; 5. Bearing; 6. Impeller; 7. Adaptive flow channel unit; 8. Isolation unit; 9. Sealing ring; 10. Inlet tank; 11. Outlet port; 71. Adjustment pipe; 72. Second fixed frame; 73. First support plate; 74. Controller; 75. Drive motor; 76. Receiver; 77. Flow guiding mechanism; 771. First rotating shaft; 772. Flow guide plate; 773. Streamline angle; 774. Pressure sensor; 775. Pressure module board; 776. Pressure relief mechanism; 7761. First arc block; 7762, Miniature electric cylinder; 7763, Piston isolation plate; 7764, Second motor; 7765, Second rotating shaft; 7766, Flow guide channel; 7767, Channel; 7768, Second arc block; 7769, Water outlet plate; 81, Impurity removal pipe; 82, Water inlet pipe; 83, Sensor; 84, Filter plate; 85, Telescopic rod; 86, Second support plate; 87, Support rod; 88, Cleaning assembly; 89, Sealing plate; 810, Waterproof layer; 881, First rotating block; 882, Scratching plate; 883, Connecting column; 884, Second rotating block; 885, Force plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the further embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] A marine multi-stage self-priming centrifugal pump includes: a first motor 1, a pump casing 3 welded and fixed to the outer surface of the first motor 1, a first fixing frame 2 bolted to the outer surface of the first motor 1, the first fixing frame 2 cooperating with a second fixing frame 72 and fixed to a specific position on the ship by bolts, a centrifugal chamber 4 provided inside the pump casing 3, an impeller 6 fixed to the output end of the first motor 1 by a bearing 5, the bearing 5 being used to compensate for installation errors of the two shafts and reduce vibration transmission, a sealing ring 9 welded and fixed inside the centrifugal chamber 4, the sealing ring 9 controlling the radial clearance between the impeller 6 and the pump casing 3 to reduce the amount of liquid leakage back into the pump, inlet grooves 10 evenly arranged near the impeller 6 in the centrifugal chamber 4, and an outlet port 11 bolted to the pump casing 3 near the inlet grooves 10, the outlet port 11 being connectable to a pipeline for easy access of liquid to other marine equipment, and further includes:

[0038] An adaptive flow channel unit 7 for suppressing turbulence and vortices in the water flowing into the centrifuge chamber 4, and an isolation unit 8 for removing impurities from the water flowing into the adaptive flow channel unit 7.

[0039] When the ship is sailing smoothly, only the isolation unit 8 of a marine multistage self-priming centrifugal pump is in working condition. However, when the ship's attitude changes drastically and unstable flow phenomena such as turbulence and vortex occur in the liquid inside the pump, the adaptive flow channel unit 7 will start working. Specifically, before starting, the pump casing 3, the adaptive flow channel unit 7, and the isolation unit 8 need to be filled with liquid. Then, the first motor 1 drives the bearing 5 and the impeller 6 to rotate, pushing the liquid to make a circular motion with the impeller 6. Under the action of centrifugal force, the liquid is thrown towards the edge of the impeller 6 and enters the inlet tank 10 in the pump casing 3, and finally enters the outlet port 11.

[0040] Regardless of the ship's state, the adsorbed water will first pass through the isolation unit 8. The isolation unit 8 includes a cleaning pipe 81, which is located on the side of the regulating pipe 71 away from the sealing ring 9. A water inlet pipe 82 is welded to the outer surface of the cleaning pipe 81. The water inlet pipe 82 is connected to the water pipe on the ship by bolts. A sensor 83 for detecting liquid flow rate and pressure parameters is installed inside the water inlet pipe 82. A telescopic rod 85 is fixedly connected to the outer surface of the cleaning pipe 81. The telescopic rod 85 is bolted to the outer surface of the cleaning pipe 81 through its base. A second support plate 86 is welded to the output end of the telescopic rod 85. A support rod 87 is welded to the outer surface of the second support plate 86. A filter plate 84 is welded to the end of the support rod 87 away from the second support plate 86. A sealing plate 89 is also welded to the outer surface of the support rod 87. A water-proof layer 810 is connected to the outer surface of the sealing plate 89 by a groove. A cleaning component 88 is provided on the support rod 87 located between the filter plate 84 and the sealing plate 89.

[0041] The incoming liquid enters the impurity removal pipe 81 through the water inlet pipes 82 on both sides. Since one side of the impurity removal pipe 81 is a filter plate 84 and the other side is a sealing plate 89 and a water-proof layer 810, the liquid will only flow from the side of the filter plate 84. The filter plate 84 will isolate the impurities in the liquid, so the impurities will not enter the subsequent adaptive flow channel unit 7 and affect its normal operation. However, the long-term isolation of impurities through the filter plate 84 will lead to a decrease in the impurity removal effect of the filter plate 84 and will also cause the filter plate 84 to become clogged. Therefore, a cleaning component 88 is also provided at the center of the support rod 87 to solve this problem.

[0042] The outer surface of the impurity removal pipe 81 is fixedly connected to the side of the regulating pipe 71 away from the sealing ring 9. The filter plate 84 is located at the notch of the impurity removal pipe 81 near the sealing ring 9, and the sealing plate 89 is located at the notch of the impurity removal pipe 81 near the telescopic rod 85.

[0043] The cleaning component 88 includes a first rotating block 881, a scraping plate 882 welded and fixed to the outer surface of the first rotating block 881, a connecting post 883 welded and fixed to the outer surface of the first rotating block 881, a second rotating block 884 welded and fixed to the outer surface of the connecting post 883 away from the first rotating block 881, and a force-bearing plate 885 welded and fixed to the outer surface of the second rotating block 884.

[0044] As liquid continuously enters through the inlet pipe 82, it impacts the force plate 885, causing the second rotating block 884 and the force plate 885 to rotate around the support rod 87. This, in turn, causes the first rotating block 881 and the scraping plate 882 to rotate, thereby scraping away impurities adhering to the filter plate 84. After each centrifugal pump operation, the telescopic rod 85 extends, thereby moving the second support plate 86, the support rod 87, and the components connected to the support rod 87 out of the impurity removal pipe 81. This facilitates further cleaning and recycling of impurities and prevents excessive impurities from remaining in the impurity removal pipe.

[0045] The inner wall of the first rotating block 881 is rotatably connected to the outer surface of the support rod 87, the inner wall of the second rotating block 884 is rotatably connected to the inner wall of the support rod 87, and the outer surface of the scraping plate 882 is in contact with the outer surface of the filter plate 84.

[0046] Since the internal flow channel design of centrifugal pumps is mostly based on stable operating conditions, when the ship's attitude changes drastically, the liquid inside the pump is prone to unstable flow phenomena such as turbulence and vortex. This not only greatly reduces the pump's self-priming efficiency and prolongs the self-priming time, but may also cause abnormal fluctuations in local pressure of the pump body, causing additional impact and wear on key components of the pump, such as the impeller 6 and the pump casing 3, thereby significantly shortening the service life of the pump. This problem can be solved by the adaptive flow channel unit 7. The adaptive flow channel unit 7 includes an adjustment pipe 71, which is connected to the centrifugal chamber 4. A flow guiding mechanism 77 is also provided inside the adjustment pipe 71.

[0047] The adaptive flow channel unit 7 also includes a first support plate 73. A controller 74 is fixedly connected to the top of the first support plate 73. The controller is bolted to the first support plate 73 via its base. Autonomous control drive motors 75 are evenly arranged on the controller 74. The output end of the drive motor 75 is connected to the top of the flow guiding mechanism 77. A receiver 76 is also fixedly connected to the outer surface of the controller 74.

[0048] When the liquid flow is turbulent, the controller 74 drives the drive motor 75 to work and drives the flow guiding mechanism 77 to change its shape, thereby suppressing the generation of turbulence and vortices.

[0049] When the sensor 83 installed in the water inlet pipe 82 detects abnormal changes in the liquid flow rate and pressure parameters, it will transmit the signal to the controller 74, which will then control the drive motor 75 to drive the flow guiding mechanism 77 to work.

[0050] One end of the regulating pipe 71 is fixedly connected to the outer surface of the sealing ring 9, and the outer surface of the first support plate 73 is fixedly connected to the outer surface of the sealing ring 9.

[0051] The flow guiding mechanism 77 includes three first rotating shafts 771, each corresponding to a drive motor 75 on the controller 74. A flow guiding plate 772 is welded and fixed to the bottom of the first rotating shaft 771. The two ends of the flow guiding plate 772 are provided with streamline angles 773 to reduce fluid stress. A pressure sensor 774 is fixedly connected to the outer surface of the flow guiding plate 772. The base of the pressure sensor 774 is fixed to the flow guiding plate 772 by bolts. Pressure module plates 775 are evenly provided on the water-facing surface of the pressure sensor 774. Pressure relief mechanisms 776 are evenly provided on the outer surface of the streamline angles 773.

[0052] When the ship is stable, the guide vane 772 is at an optimized conventional angle, that is, the streamline angle 773 is aligned with the direction of water flow, ensuring the efficient operation of the pump. At the same time, the streamline angle 773 will reduce the maximum stress concentration factor from 1.8 to 1.2, avoiding fatigue fracture.

[0053] Once the ship experiences turbulence, the drive motor 75 will rotate the first shaft 771 according to the liquid flow rate and pressure parameters, thereby rotating the guide plate 772 to a suitable angle to guide the liquid to flow in an orderly manner and effectively suppress the generation of turbulence and vortices. After the liquid comes into contact with the first guide plate 772, the liquid will also impact the pressure module plate 775 on the pressure sensor 774, thereby detecting the flow rate and pressure parameters of the liquid after contacting the first guide plate 772 in real time and transmitting the signal to the controller 74. The controller 74 will drive the subsequent first shaft 771 and guide plate 772 to change their angles, and so on, so that the liquid is in a stable state at any position in the regulating pipe 71 and no turbulence or vortex is generated.

[0054] The top of the first rotating shaft 771 is fixedly connected to the output end of the drive motor 75, and a water-proof material is provided between the outer surface of the first rotating shaft 771 and the regulating pipe 71.

[0055] The pressure relief mechanism 776 includes a first arc block 7761, a miniature electric cylinder 7762 is fixedly connected to the bottom of the first arc block 7761, the base of the miniature electric cylinder 7762 is fixed to the bottom of the first arc block 7761 by bolts, and piston isolation plates 7763 are evenly arranged at the output end of the miniature electric cylinder 7762.

[0056] The pressure relief mechanism 776 also includes a second motor 7764. The output end of the second motor 7764 is fixed to a second rotating shaft 7765 via a coupling. A flow guide channel 7766 is welded and fixed to the outer surface of the second rotating shaft 7765.

[0057] The addition of the first rotating shaft 771 and the second rotating shaft 7765 is designed to extend the length of the rotating shafts of the drive motor 75 and the second motor 7764, which is insufficient. The ends of the first rotating shaft 771 and the second rotating shaft 7765 can be directly connected to the ends of the corresponding output ends through a threaded design, which facilitates disassembly, installation and maintenance in the future.

[0058] A water outlet plate 7769 is welded and fixed to the side of the flow guide plate 772 away from the pressure sensor 774. A second arc block 7768 is welded and fixed to the outer surface of the water outlet plate 7769. Channels 7767 are provided on the second arc block 7768 and the first arc block 7761.

[0059] The outer surface of the first arc block 7761 is fixedly connected to the outer surface of the streamline angle 773, and the outer surface of the second motor 7764 is fixedly connected to the top of the guide plate 772.

[0060] The channels 7767 on the second arc block 7768 and the first arc block 7761 correspond to each other around the guide plate 772 in sequence. Water enters the first arc plate, the guide channel 7766, the second arc plate in sequence, and finally flows out from the outlet plate 7769.

[0061] However, when the liquid flow rate is high and the impact force is large, the change in the angle of the guide plate 772 will cause a sudden change in local resistance and the generation of eddies in the regulating pipe 71. Specifically, when the angle of the guide plate 772 changes abruptly (such as rapidly adjusting from 15° to 30°), an instantaneous pressure difference will form between the front and rear edges of the guide plate 772, which may generate new eddies or "dead water zones" in the flow channel, thereby increasing the flow resistance and causing a temporary decrease in pump efficiency. At this time, the micro electric cylinder 7762 will adjust the piston isolation plate 776 at the corresponding angle according to the change in angle. 3. The flow is retracted, thus exposing the channel 7767 on the first arc block 7761. At the same time, the second motor 7764 drives the second rotating shaft 7765 and the guide channel 7766 to rotate to the angle corresponding to the channel 7767. This allows the liquid flowing at the front end of the guide plate 772 to enter through the channel 7767 and enter the angle corresponding to the exposed channel 7767. As a result, the water sequentially enters the first arc plate, the guide channel 7766, the second arc plate, and finally flows out from the outlet plate 7769, reducing the pressure difference and also reducing rigidity damage.

[0062] The working process of a marine multi-stage self-priming centrifugal pump provided by this invention is as follows:

[0063] First, the isolation unit 8 starts working. The incoming liquid enters the impurity removal pipe 81 through the inlet pipes 82 on both sides. Since one side of the impurity removal pipe 81 is a filter plate 84, and the other side is a sealing plate 89 and a water-proof layer 810, the liquid only flows from the side with the filter plate 84. The filter plate 84 isolates the impurities in the liquid, preventing them from entering the subsequent adaptive flow channel unit 7. As the liquid continues to enter through the inlet pipes 82, it impacts the force plate 885, causing the second rotating block 884 and the force plate 885 to rotate around the support rod 87. This, in turn, causes the first rotating block 881 and the scraping plate 882 to rotate, thereby removing the liquid adhering to the filter plate 884. Impurities are scraped off the filter plate 84. After each centrifugal pump operation, the telescopic rod 85 extends, thereby moving the second support plate 86, support rod 87, and components connected to the support rod 87 out of the impurity removal pipe 81, facilitating further cleaning and recovery of impurities. Afterward, the liquid enters the regulating pipe group. When the sensor 83 detects abnormal changes in the liquid flow rate and pressure parameters, it transmits the signal to the controller 74. The controller 74 controls the drive motor 75 to rotate the first rotating shaft 771 according to the liquid flow rate and pressure parameters, thereby rotating the guide plate 772 to a suitable angle, guiding the liquid to flow in an orderly manner, and effectively suppressing the generation of turbulence and vortices.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A marine multistage self-priming centrifugal pump comprising: First motor, the outer surface of the first motor is fixedly connected with the pump shell, the pump shell is provided with centrifugal cavity, the output end of the first motor is fixedly connected with the impeller through the bearing, the centrifugal cavity is fixedly connected with the sealing ring, the centrifugal cavity is uniformly provided with the liquid inlet groove near the impeller, the pump shell is fixedly connected with the liquid outlet port near the liquid inlet groove, characterized by further comprising: The adaptive flow channel unit for inhibiting turbulence and vortex of water flowing into the centrifugal cavity, the isolation unit for removing impurities of water flowing into the adaptive flow channel unit; The adaptive flow channel unit comprises an adjusting pipeline, the adjusting pipeline is communicated with the centrifugal cavity, and a flow guide mechanism is further arranged in the adjusting pipeline; The adaptive flow channel unit further comprises a first support plate, a controller is fixedly connected to the top of the first support plate, the controller is uniformly provided with a self-controlled drive motor, the output end of the drive motor is connected with the top of the flow guide mechanism, and a receiver is further fixedly connected to the outer surface of the controller; When the liquid flow is disturbed, the controller drives the drive motor to work and drives the flow guide mechanism to change the form to inhibit the generation of turbulence and vortex; The flow guide mechanism comprises a first rotating shaft, a flow guide plate is fixedly connected to the bottom of the first rotating shaft, flow line angles for reducing fluid stress are arranged at the both ends of the flow guide plate, a pressure sensor is fixedly connected to the outer surface of the flow guide plate, pressure module plates are uniformly arranged on the water-facing surface of the pressure sensor, and buffer mechanisms are uniformly arranged on the outer surface of the flow line angles; The buffer mechanism comprises a first arc block, a micro electro-cylinder is fixedly connected to the bottom of the first arc block, and a piston isolation plate is uniformly arranged on the output end of the micro electro-cylinder; The buffer mechanism further comprises a second motor, a second rotating shaft is fixedly connected to the output end of the second motor, and a flow guide channel is fixedly connected to the outer surface of the second rotating shaft; The flow guide plate is fixedly connected with a water outlet plate on the side away from the pressure sensor, the outer surface of the water outlet plate is fixedly connected with a second arc block, and channels are arranged on the second arc block and the first arc block.

2. A multi-stage self-priming centrifugal pump for marine use according to claim 1, characterized in that: One end of the adjusting pipeline is fixedly connected with the outer surface of the sealing ring, and the outer surface of the first support plate is fixedly connected with the outer surface of the sealing ring.

3. A multi-stage self-priming centrifugal pump for marine use according to claim 1, characterized in that: The top of the first rotating shaft is fixedly connected with the output end of the drive motor, and a waterproof material is arranged between the outer surface of the first rotating shaft and the adjusting pipeline.

4. A multi-stage self-priming centrifugal pump for marine use according to claim 1, characterized in that: The outer surface of the first arc block is fixedly connected with the outer surface of the flow line angle, and the outer surface of the second motor is fixedly connected with the top of the flow guide plate.

5. A multi-stage self-priming centrifugal pump for marine use according to claim 1, characterized in that: The channels on the second arc block and the first arc block correspond to the flow guide plate in sequence, water enters the first arc plate, the flow guide channel and the second arc plate in sequence and finally flows out from the water outlet plate.

6. A multi-stage self-priming centrifugal pump for marine use according to claim 1, characterized in that: The isolation unit includes a dedusting pipeline, the dedusting pipeline is arranged on the side of the adjusting pipeline away from the sealing ring, the outer surface of the dedusting pipeline is fixedly connected with a water inlet pipe, the inner surface of the water inlet pipe is provided with a sensor for detecting liquid flow rate and pressure parameter, the outer surface of the dedusting pipeline is fixedly connected with a telescopic rod, the output end of the telescopic rod is fixedly connected with a second supporting plate, the outer surface of the second supporting plate is fixedly connected with a supporting rod, the end of the supporting rod away from the second supporting plate is fixedly connected with a filter plate, the outer surface of the supporting rod is further fixedly connected with a sealing plate, the outer surface of the sealing plate is fixedly connected with a waterproof layer, the supporting rod between the filter plate and the sealing plate is provided with a cleaning assembly.

7. A multi-stage self-priming centrifugal pump for marine use according to claim 6, characterized in that: The outer surface of the dedusting pipeline is fixedly connected with the side of the adjusting pipeline away from the sealing ring, the filter plate is arranged at the gap of the dedusting pipeline close to the sealing ring, and the sealing plate is arranged at the gap of the dedusting pipeline close to the telescopic rod.

8. A multi-stage self-priming centrifugal pump for marine use according to claim 7, characterized in that: The cleaning assembly includes a first rotating block, the outer surface of the first rotating block is fixedly connected with a scraping plate, the outer surface of the first rotating block is further fixedly connected with a connecting column, the outer surface of the connecting column away from the first rotating block is fixedly connected with a second rotating block, and the outer surface of the second rotating block is fixedly connected with a stress plate.

9. A multi-stage self-priming centrifugal pump for marine use according to claim 8, characterized in that: The inner wall of the first rotating block is rotationally connected with the outer surface of the supporting rod, the inner wall of the second rotating block is rotationally connected with the inner wall of the supporting rod, and the outer surface of the scraping plate is in contact with the outer surface of the filter plate.

Images