Large-flow rotary jet pump and using method thereof

Abstract

The invention provides a high-flow rotary jet pump and a using method thereof, and relates to the technical field of non-variable-capacity pumps. The device comprises two sets of pump mechanisms, a driving mechanism and a pipeline mechanism, the driving mechanism drives the two sets of pump mechanisms to operate independently or simultaneously, each pump mechanism comprises a bearing box and a pump shell connected with the bearing box, the pump shell is connected with a pump cover, the pump cover is connected with a water inlet and outlet body, and the water inlet and outlet body is provided with a liquid inlet pipe and a liquid outlet pipe; the pipeline mechanism comprises an input pipe group and an output pipe group, the input pipe group comprises input branch pipes communicated with the liquid inlet pipes of the two pump mechanisms respectively and an input main pipe communicated with the two input branch pipes, and the input main pipe is communicated with the two input branch pipes through a first three-way plug valve; the output pipe set comprises output branch pipes communicated with the liquid outlet pipes of the two pump mechanisms respectively and an output main pipe communicated with the two output branch pipes, and the output main pipe is communicated with the two output branch pipes through a second three-way plug valve. Compared with a traditional rotary jet pump, high pressure and large flow are achieved, and the core advantage of the rotary jet pump extends to the high pressure and large flow field.

Description

Technical Field

[0001] This invention relates to the field of non-variable displacement pump technology, specifically to a high-flow-rate rotary jet pump and its usage method. Background Technology

[0002] A rotary jet pump is a type of Pitot tube pump. It features high pressure and low flow rate, making it suitable for high-pressure cleaning in chemical, petroleum, and food processing industries (such as CIP cleaning systems), papermaking, power plants, and manufacturing. It is also commonly used in automotive drilling and flushing, carbon black production, and deep well waste treatment.

[0003] In the existing technology, the application scenarios of rotary jet pumps are limited due to their high pressure and low flow rate. If the flow rate can be increased, rotary jet pumps can have a broad application prospect. Summary of the Invention

[0004] The purpose of this invention is to develop a high-flow-rate rotary jet pump that achieves high pressure and high flow rate compared to traditional rotary jet pumps, extending the core advantages of rotary jet pumps to the field of high pressure and high flow rate, and its usage method.

[0005] This invention is achieved through the following technical solution: A high-flow-rate rotary jet pump includes: Two sets of pump mechanisms, drive mechanisms, and pipeline mechanisms are provided. The drive mechanism can drive the two sets of pump mechanisms to operate individually or simultaneously. The pump mechanism includes a bearing housing, a pump casing connected to the bearing housing, a pump cover connected to the pump casing, an inlet and outlet water body connected to the pump cover, and an inlet pipe and an outlet pipe provided on the inlet and outlet water body. The pipeline system includes an input pipe group and an output pipe group. The input pipe group includes an input branch pipe that is connected to the inlet pipe of the two pump mechanisms respectively, and an input main pipe that is connected to the two input branch pipes. The input main pipe and the two input branch pipes are connected through a first three-way plug valve. The output pipe assembly includes an output branch pipe that is connected to the liquid outlet pipe of the two pump mechanisms respectively, and an output main pipe that is connected to the two output branch pipes. The output main pipe and the two output branch pipes are connected through a second three-way stopcock valve.

[0006] Optionally, a pump shaft is rotatably mounted inside the bearing housing, and a bearing is provided between the pump shaft, the bearing housing, and the pump casing. A rotor cavity coaxially connected to the pump shaft is provided inside the pump casing, and an impeller is connected to the rotor cavity. A liquid collecting pipe is provided inside the rotor cavity. The impeller is rotatably connected to the liquid collecting pipe and the pump cover and is mechanically sealed. The liquid inlet pipe is connected to the impeller, and the liquid outlet pipe is connected to the liquid collecting pipe. The drive mechanism includes a dual-output shaft motor located between two bearing housings. The two output ends of the dual-output shaft motor are respectively connected to the pump shafts of the two pump mechanisms via electromagnetic clutches. The operation of the dual-output shaft motor drives the pump shafts of the two pump mechanisms to rotate. The electromagnetic clutches control the separation and engagement of the pump shafts with the output shafts of the dual-output shaft motor.

[0007] Optionally, the pipeline mechanism further includes a series pipe assembly, which includes a fifth three-way plug valve on the input branch pipe and a sixth three-way plug valve on the output branch pipe, wherein the fifth three-way plug valves and the sixth three-way plug valves of the two sets of pump mechanisms are connected in pipeline.

[0008] Optionally, the piping system further includes a flow channel flushing pipe assembly, which includes a third three-way stopcock valve located on the pump mechanism inlet pipe, and a drain pipe is connected to the third three-way stopcock valve.

[0009] Optionally, the pipeline system further includes a sealed cavity flushing pipe assembly, which includes a flushing inlet pipe and a flushing outlet pipe disposed on the pump casing and communicating with the sealed cavity inside it. Both the flushing inlet pipe and the flushing outlet pipe are equipped with solenoid valves, and each of the two output branch pipes is equipped with a fourth three-way stopcock valve. The fourth three-way stopcock valve is connected to a liquid distribution pipe communicating with the flushing inlet pipe.

[0010] Optionally, the sealed cavity flushing pipe assembly further includes a pressure reducing valve, a throttle valve, and a filter connected in sequence, with the liquid distribution pipe connected to the pressure reducing valve and the filter connected to the flushing inlet pipe.

[0011] A method for using a high-flow-rate rotary jet pump, comprising two operating modes: Mode 1 and Mode 2, wherein: In mode 1, one set of pump mechanisms is running while the other set is stopped. The first three-way plug valve connects the main input pipe to the input branch pipe of the running pump mechanism, and the second three-way plug valve connects the output branch pipe of the running pump mechanism to the output main pipe, so as to realize the fluid transport by a single set of pump mechanisms. In mode two, two pump mechanisms operate in parallel. The first three-way plug valve connects the main input pipe to both input branch pipes, and the second three-way plug valve connects both output branch pipes to the main output pipe. The fluid enters the two pump mechanisms respectively, is pumped, output, and then collects into the main output pipe.

[0012] A method for using a high-flow rotary jet pump includes a third operating mode, in which two pump mechanisms operate in series. One pump mechanism serves as the first pressurizing unit, and the other serves as the second pressurizing unit. The fluid first enters the first pressurizing unit for pressurization, and then enters the second pressurizing unit for further pressurization. A first three-way stopcock valve connects the main inlet pipe to the inlet branch pipe of the first pressurizing unit. The sixth three-way stopcock valve of the first pressurizing unit connects to the fifth three-way stopcock valve of the second pressurizing unit. The second three-way stopcock valve connects the main outlet pipe to the outlet branch pipe of the second pressurizing unit. The fluid output from the first pressurizing unit enters the fifth three-way stopcock valve of the second pressurizing unit through its sixth three-way stopcock valve. After being pressurized again by the second pressurizing unit, the fluid enters the main outlet pipe from the outlet branch pipe of the second pressurizing unit for output.

[0013] A method for using a high-flow rotary jet pump includes a fourth operating mode, in which one pump mechanism operates while the other stops. A first three-way stop valve connects the main inlet pipe to the inlet branch pipe of the operating pump mechanism, and a second three-way stop valve connects both outlet branch pipes to the main outlet pipe. A third three-way stop valve of the stopped pump mechanism connects the inlet pipe to the outlet pipe. Part of the fluid pumped by the operating pump mechanism is output through the main outlet pipe, and the other part is input through the outlet branch pipe of the stopped pump mechanism, thereby backwashing the fluid flow channel inside the stopped pump mechanism. The flushed waste liquid is discharged through the third three-way stop valve and the outlet pipe.

[0014] A method for using a high-flow rotary jet pump includes a fifth operating mode: one pump mechanism operates while another stops. The fourth three-way stop valve of the stopped pump mechanism disconnects the connection between the liquid distribution pipe and the output branch pipe. The fourth three-way stop valve of the operating pump mechanism connects the liquid distribution pipe and the output branch pipe, making the output branch pipe a pass. The solenoid valves of the flushing inlet and flushing outlet pipes of the stopped pump mechanism are opened. Part of the output fluid from the operating pump mechanism is output through the main output pipe, while the other part is diverted by the fourth three-way stop valve and passes through a pressure reducing valve, a throttle valve, and a filter before entering the sealed cavity inside the stopped pump mechanism to flush the sealing structure. The flushing waste liquid is discharged through the flushing outlet pipe.

[0015] The beneficial effects of this invention are: Compared to traditional rotary jet pumps, this invention achieves high pressure and high flow rate, breaking the traditional boundary of high pressure and low flow rate. It extends the core advantages of rotary jet pumps to the field of high pressure and high flow rate, providing an efficient, reliable, and low-cost delivery solution. This drives its upgrade from a niche high-pressure pump to a general-purpose high-pressure and high-flow pump, with broad application prospects in industries such as chemical and energy. The two pump mechanisms can be used in parallel and standby, enabling maintenance and repair without stopping the machine. While maintaining fluid delivery, the shut-down pump mechanism can be backflushed internally and the sealing cavity can be flushed. In addition to parallel operation to increase flow rate, the two pump mechanisms can also be connected in series to further increase the pressure of the rotary jet pump, making its application scenarios more extensive. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a fluid flow trajectory diagram for Model 1; Figure 3 This is a flow trajectory diagram for Mode 2 fluid. Figure 4 The fluid flow trajectory diagram for Model 3; Figure 5 This is a flow trajectory diagram for Model 4 fluid. Figure 6 This is a flow trajectory diagram for Model 5.

[0018] Reference numerals in the attached diagram: 1. First three-way plug valve; 2. Second three-way plug valve; 3. Third three-way plug valve; 4. Fourth three-way plug valve; 5. Fifth three-way plug valve; 6. Sixth three-way plug valve; 7. Main inlet pipe; 8. Inlet branch pipe; 9. Main outlet pipe; 10. Outlet branch pipe; 11. Divider pipe; 12. Pressure reducing valve; 13. Throttling valve; 14. Filter; 15. Flushing inlet pipe; 16. Flushing outlet pipe; 17. Bearing; 18. Bearing housing; 19. Dual-shaft motor; 20. Pump shaft; 21. Electromagnetic clutch; 22. Pump casing; 23. Pump cover; 24. Inlet and outlet water bodies; 25. Outlet pipe; 26. Inlet pipe; 27. Collector pipe; 28. Rotor cavity; 29. ​​Impeller. Detailed Implementation

[0019] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0020] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the present invention discloses a high-flow-rate rotary jet pump, including two sets of pump mechanisms, a drive mechanism and a pipeline mechanism. The drive mechanism drives the two sets of pump mechanisms to operate individually or simultaneously. The pump mechanisms and the drive mechanism are fixed on a bracket (not shown in the figure).

[0023] The pump mechanism includes a bearing housing 18, a pump casing 22 connected to the bearing housing 18, a pump cover 23 connected to the pump casing 22, and an inlet / outlet water body 24 connected to the pump cover 23. A pump shaft 20 is rotatably mounted inside the bearing housing 18, and a bearing 17 is provided between the pump shaft 20, the bearing housing 18, and the pump casing 22. A rotor chamber 28, coaxially connected to the pump shaft 20, is provided inside the pump casing 22. An impeller 29 is connected to the rotor chamber 28, and a liquid collecting pipe 27 is provided inside the rotor chamber 28. The impeller 29 is rotatably connected to the liquid collecting pipe 27 and the pump cover 23, and is mechanically sealed. The inlet / outlet water body 24 is provided with an inlet pipe 26 communicating with the impeller 29 and an outlet pipe 25 communicating with the liquid collecting pipe 27.

[0024] The drive mechanism includes a dual-output shaft motor 19 located between two bearing housings 18. The two output ends of the dual-output shaft motor 19 are respectively connected to the pump shafts 20 of the two pump mechanisms via electromagnetic clutches 21. The operation of the dual-output shaft motor 19 drives the pump shafts 20 of the two pump mechanisms to rotate. The electromagnetic clutches 21 control the separation and engagement of the pump shafts 20 and the output shafts of the dual-output shaft motor 19.

[0025] The piping system includes an input pipe assembly, an output pipe assembly, a series pipe assembly, a flow channel flushing pipe assembly, and a sealing cavity flushing pipe assembly. The input pipe assembly controls the fluid input to the rotary jet pump, the output pipe assembly controls the fluid output from the rotary jet pump, the series pipe assembly connects two sets of pump mechanisms in series, allowing the fluid to flow through the two sets of pump mechanisms sequentially, the flow channel flushing pipe assembly flushes the internal fluid flow channels of the pump mechanism, and the sealing cavity flushing pipe assembly flushes the sealing cavity of the rotary jet pump.

[0026] The input pipe assembly includes input branch pipes 8 that are connected to the inlet pipes 26 of the two pump mechanisms respectively, and input main pipe 7 that is connected to the two input branch pipes 8. The input main pipe 7 is connected to the two input branch pipes 8 through the first three-way plug valve 1. The fluid in the input main pipe 7 can be simultaneously input into the two input branch pipes 8 or into any one of the input branch pipes 8 through the first three-way plug valve 1.

[0027] The output pipe assembly includes an output branch pipe 10 that is connected to the outlet pipe 25 of the two pump mechanisms, and an output main pipe 9 that is connected to the two output branch pipes 10. The output main pipe 9 is connected to the two output branch pipes 10 through a second three-way stop valve 2. The fluid in the two output branch pipes 10 can be simultaneously input into the output main pipe 9 through the second three-way stop valve 2, or any one of the output branch pipes 10 can be input into the output main pipe 9 through the second three-way stop valve 2.

[0028] The series pipe assembly includes a fifth three-way plug valve 5 located on the input branch pipe 8 and a sixth three-way plug valve 6 located on the output branch pipe 10. The fifth three-way plug valve 5 and the sixth three-way plug valve 6 of the two pump mechanisms are connected in pipeline.

[0029] The flow channel flushing pipe assembly includes a third three-way stopcock valve 3 located on the pump mechanism inlet pipe 26. The third three-way stopcock valve 3 is connected to a drain pipe. When flushing the fluid flow channel inside the pump mechanism, the third three-way stopcock valve 3 connects the inlet pipe 26 to the drain pipe, and the waste liquid generated during flushing is discharged from the drain pipe.

[0030] The flushing pipe assembly for the sealed cavity includes a flushing inlet pipe 15 and a flushing outlet pipe 16, which are mounted on the pump housing 22 and communicate with the sealed cavity inside it. Both the flushing inlet pipe 15 and the flushing outlet pipe 16 are equipped with solenoid valves. The two output branch pipes 10 are respectively equipped with fourth three-way plug valves 4. The fourth three-way plug valves 4 are respectively connected to liquid distribution pipes 11. The flushing pipe assembly for the sealed cavity also includes a pressure reducing valve 12, a throttle valve 13 and a filter 14 connected in sequence. The liquid distribution pipe 11 is connected to the pressure reducing valve 12 and the filter 14 is connected to the flushing inlet pipe 15.

[0031] The above-mentioned method of using a high-flow-rate rotary jet pump includes Figure 2 Pattern 1 shown Figure 3 Pattern 2 shown Figure 4 Pattern 3 shown Figure 5 Pattern 4 and shown Figure 6 The diagram shows five working modes in total, among which... Mode 1: One pump mechanism is running while the other is stopped. The pump shaft 20 of the running pump mechanism is engaged with the drive mechanism through the electromagnetic clutch 21, and the pump shaft 20 of the stopped pump mechanism is separated from the drive mechanism through the electromagnetic clutch 21. The first three-way plug valve 1 connects the input main pipe 7 with the input branch pipe 8 of the running pump mechanism, and the second three-way plug valve 2 connects the output branch pipe 10 of the running pump mechanism with the output main pipe 9, so as to realize the fluid transportation of a single pump mechanism. Mode 2: Two pump mechanisms operate in parallel. The pump shafts 20 of both pump mechanisms are engaged with the drive mechanism through electromagnetic clutches 21. The first three-way plug valve 1 connects the main input pipe 7 to both input branch pipes 8. The second three-way plug valve 2 connects both output branch pipes 10 to the main output pipe 9. The fluid enters the two pump mechanisms respectively, is pumped, output, and then collects into the main output pipe 9, so that the two pump mechanisms can operate at the same time to increase the flow rate and achieve large flow rate delivery. Mode 3: Two pump mechanisms operate in series. The pump shafts 20 of both pump mechanisms are engaged with the drive mechanism via electromagnetic clutches 21. One pump mechanism serves as the first pressurizing unit, and the other serves as the second pressurizing unit. The fluid first enters the first pressurizing unit (i.e., one of the pump mechanisms) for pressurization, and then enters the second pressurizing unit (i.e., the other pump mechanism) for further pressurization. The first three-way stopcock valve 1 connects the main input pipe 7 with the input branch pipe 8 of the first pressurizing unit. The sixth three-way stopcock valve 6 of the first pressurizing unit connects with the fifth three-way stopcock valve of the second pressurizing unit. The plug valve 5 is connected, and the second three-way plug valve 2 connects the output main pipe to the output branch pipe 10 of the second pressurizing unit. The fluid output from the first pressurizing unit enters the fifth three-way plug valve 5 of the second pressurizing unit through its sixth three-way plug valve 6. After being pressurized by the second pressurizing unit, the fluid enters the output main pipe through the output branch pipe 10 of the second pressurizing unit. Since both pump mechanisms are equipped with the fifth three-way plug valve 5 and the sixth three-way plug valve 6, they can both serve as the first pressurizing unit or the second pressurizing unit. This mode achieves high-pressure (compared to mode one and mode two) delivery. Mode 4: One pump mechanism is running while the other is stopped. The pump shaft 20 of the running pump mechanism is engaged with the drive mechanism through the electromagnetic clutch 21, and the pump shaft 20 of the stopped pump mechanism is separated from the drive mechanism through the electromagnetic clutch 21. The first three-way stop valve 1 connects the input main pipe 7 to the input branch pipe 8 of the running pump mechanism. The second three-way stop valve 2 connects both output branch pipes 10 to the output main pipe 9. The third three-way stop valve 3 of the stopped pump mechanism connects the inlet pipe 26 to the outlet pipe. Part of the fluid pumped by the running pump mechanism is output through the output main pipe 9, and the other part is input through the output branch pipe 10 of the stopped pump mechanism, which backwashes the internal fluid flow channel of the stopped pump mechanism. The flushed waste liquid is discharged through the third three-way stop valve 3 and the outlet pipe, realizing the backwashing of the internal flow channel of the pump mechanism without stopping the fluid delivery. Mode 5: One pump mechanism operates while the other stops. The pump shaft 20 of the operating pump mechanism is engaged with the drive mechanism via electromagnetic clutch 21, while the pump shaft 20 of the stopped pump mechanism is disengaged from the drive mechanism via electromagnetic clutch 21. The fourth three-way stopcock valve 4 of the stopped pump mechanism disconnects the connection between the liquid distribution pipe 11 and the output branch pipe 10. The fourth three-way stopcock valve 4 of the operating pump mechanism connects the liquid distribution pipe 11 and the output branch pipe 10, making the output branch pipe 10 a pass. The solenoid valves of the flushing inlet pipe 15 and the flushing outlet pipe 16 of the stopped pump mechanism are opened. Part of the output fluid from the operating pump mechanism is output through the main output pipe 9, while the other part is diverted by the fourth three-way stopcock valve 4 and passes through the pressure reducing valve 12, the throttle valve 13, and the filter 14 before entering the sealed cavity inside the stopped pump mechanism to flush the sealing structure. The flushing waste liquid is discharged through the flushing outlet pipe 16, thus achieving flushing of the sealing structure inside the pump mechanism without stopping the fluid delivery.

[0032] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.

Claims

1. A high-flow-rate rotary jet pump, characterized in that, include: Two sets of pump mechanisms, drive mechanisms, and pipeline mechanisms are provided. The drive mechanism can drive the two sets of pump mechanisms to operate individually or simultaneously. The pump mechanism includes a bearing housing, a pump casing connected to the bearing housing, a pump cover connected to the pump casing, an inlet and outlet water body connected to the pump cover, and an inlet pipe and an outlet pipe provided on the inlet and outlet water body. The pipeline system includes an input pipe group and an output pipe group. The input pipe group includes an input branch pipe that is connected to the inlet pipe of the two pump mechanisms respectively, and an input main pipe that is connected to the two input branch pipes. The input main pipe and the two input branch pipes are connected through a first three-way plug valve. The output pipe assembly includes an output branch pipe that is connected to the liquid outlet pipe of the two pump mechanisms respectively, and an output main pipe that is connected to the two output branch pipes. The output main pipe and the two output branch pipes are connected through a second three-way stopcock valve.

2. The high-flow-rate rotary jet pump according to claim 1, characterized in that, A pump shaft is rotatably mounted inside the bearing housing. A bearing is provided between the pump shaft, the bearing housing, and the pump casing. A rotor cavity coaxially connected to the pump shaft is provided inside the pump casing. An impeller is connected to the rotor cavity. A liquid collecting pipe is provided inside the rotor cavity. The impeller is rotatably connected to the liquid collecting pipe and the pump cover and is mechanically sealed. The liquid inlet pipe is connected to the impeller, and the liquid outlet pipe is connected to the liquid collecting pipe. The drive mechanism includes a dual-output shaft motor located between two bearing housings. The two output ends of the dual-output shaft motor are respectively connected to the pump shafts of the two pump mechanisms via electromagnetic clutches. The operation of the dual-output shaft motor drives the pump shafts of the two pump mechanisms to rotate. The electromagnetic clutches control the separation and engagement of the pump shafts with the output shafts of the dual-output shaft motor.

3. The high-flow-rate rotary jet pump according to claim 1, characterized in that, The pipeline system also includes a series pipe assembly, which includes a fifth three-way plug valve on the input branch pipe and a sixth three-way plug valve on the output branch pipe. The fifth three-way plug valves and the sixth three-way plug valves of the two pump systems are connected in pipeline.

4. The high-flow-rate rotary jet pump according to claim 1, characterized in that, The pipeline system also includes a flow channel flushing pipe assembly, which includes a third three-way stopcock valve located on the pump mechanism inlet pipe, and a drain pipe is connected to the third three-way stopcock valve.

5. The high-flow-rate rotary jet pump according to claim 1, characterized in that, The pipeline system also includes a sealed cavity flushing pipe assembly, which includes a flushing inlet pipe and a flushing outlet pipe disposed on the pump casing and communicating with the sealed cavity inside it. Both the flushing inlet pipe and the flushing outlet pipe are equipped with solenoid valves. Each of the two output branch pipes is equipped with a fourth three-way stopcock valve, and the fourth three-way stopcock valve is connected to a liquid distribution pipe communicating with the flushing inlet pipe.

6. The high-flow-rate rotary jet pump according to claim 5, characterized in that, The sealed cavity flushing pipe assembly also includes a pressure reducing valve, a throttle valve, and a filter connected in sequence. The liquid distribution pipe is connected to the pressure reducing valve, and the filter is connected to the flushing inlet pipe.

7. A method of using the high-flow-rate rotary jet pump as described in claim 1, characterized in that, The operating modes include Mode 1 and Mode 2, wherein: In mode 1, one set of pump mechanisms is running while the other set is stopped. The first three-way plug valve connects the main input pipe to the input branch pipe of the running pump mechanism, and the second three-way plug valve connects the output branch pipe of the running pump mechanism to the output main pipe, so as to realize the fluid transport by a single set of pump mechanisms. In mode two, two pump mechanisms operate in parallel. The first three-way plug valve connects the main input pipe to both input branch pipes, and the second three-way plug valve connects both output branch pipes to the main output pipe. The fluid enters the two pump mechanisms respectively, is pumped, output, and then collects into the main output pipe.

8. A method of using the high-flow-rate rotary jet pump as described in claim 3, characterized in that, The operating mode includes mode three, in which two pump mechanisms operate in series. One pump mechanism serves as the first pressurizing unit, and the other serves as the second pressurizing unit. The fluid first enters the first pressurizing unit for pressurization, and then enters the second pressurizing unit for further pressurization. The first three-way stopcock valve connects the main input pipe to the input branch pipe of the first pressurizing unit. The sixth three-way stopcock valve of the first pressurizing unit connects to the fifth three-way stopcock valve of the second pressurizing unit. The second three-way stopcock valve connects the main output pipe to the output branch pipe of the second pressurizing unit. The fluid output from the first pressurizing unit enters the fifth three-way stopcock valve of the second pressurizing unit through its sixth three-way stopcock valve. After being pressurized by the second pressurizing unit, the fluid enters the main output pipe through the output branch pipe of the second pressurizing unit for output.

9. A method of using the high-flow-rate rotary jet pump as described in claim 4, characterized in that, The operating mode includes mode four, in which one pump mechanism is running while the other is stopped. The first three-way stop valve connects the main input pipe to the input branch pipe of the running pump mechanism, and the second three-way stop valve connects both output branch pipes to the main output pipe. The third three-way stop valve of the stopped pump mechanism connects the inlet pipe to the outlet pipe. Part of the fluid pumped by the running pump mechanism is output through the main output pipe, and the other part is input through the outlet branch pipe of the stopped pump mechanism, which backwashes the fluid flow channel inside the stopped pump mechanism. The flushed waste liquid is discharged through the third three-way stop valve and the outlet pipe.

10. A method of using the high-flow-rate rotary jet pump as described in claim 5, characterized in that, The operating mode includes mode five, in which one pump mechanism is running while the other is stopped. The fourth three-way stop valve of the stopped pump mechanism disconnects the connection between the liquid distribution pipe and the output branch pipe. The fourth three-way stop valve of the running pump mechanism connects the liquid distribution pipe and the output branch pipe, making the output branch pipe a passage. The solenoid valves of the flushing inlet and flushing outlet pipes of the stopped pump mechanism are opened. Part of the output fluid of the running pump mechanism is output through the main output pipe, and the other part is diverted by the fourth three-way stop valve and enters the sealed cavity in the stopped pump mechanism after passing through the pressure reducing valve, throttle valve and filter to flush the sealing structure. The flushing waste liquid is discharged through the flushing outlet pipe.

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