Water medium test loop device for high-flow vertical centrifugal pump

Abstract

The invention discloses a high-flow vertical centrifugal pump water medium test loop device, and relates to the field of pump body test devices.The high-flow vertical centrifugal pump water medium test loop device comprises a main body base, a flow stabilizing tank used for stabilizing guided-in water flow is arranged on one side of the top of the main body base, and the output end of the flow stabilizing tank is in butt joint with an inlet pipeline; a pump body for providing transmission power is arranged at the end, away from the flow stabilizing tank, of the inlet pipeline, an outlet pipeline is arranged at the end, away from the inlet pipeline, of the pump body in a butt joint mode, a transition tank used for uniformizing flow is arranged at the end, away from the pump body, of the outlet pipeline, and a plurality of flow measuring pipelines are arranged at the end, away from the outlet pipeline, of the transition tank. And the plurality of flow measuring pipelines are communicated with the steady flow tank. The measuring pipeline is shunted, so that fluid detection is carried out, the overall occupied area of the pipeline is reduced, and a mounting space is reserved for the flowmeter.

Description

Technical Field

[0001] The invention relates to the field of pump body testing devices, in particular to a water medium testing loop device for a large-flow vertical centrifugal pump. Background Art

[0002] During the design, development, and finished product acceptance process of centrifugal pumps, in order to verify whether they meet the design requirements or contract requirements, tests and tests must be carried out on special test equipment. These tests help ensure that the centrifugal pump can operate stably and meet the expected performance indicators in actual applications. The vertical centrifugal pump water medium test circuit device usually includes a main circuit system and an auxiliary system. The main circuit system mainly consists of a vertical centrifugal pump, a pressure stabilizer, a flow meter, a condenser, and other components.

[0003] Water is a very common test medium in centrifugal pump tests because of its stable density, viscosity, and flow properties, as well as its easy availability. However, in large-flow water medium tests, due to the high density and large flow of water, pipes of corresponding sizes are required. However, as the pipe size increases, the installation space for the flow meter is insufficient. At the same time, due to the change in pipe size, the liquid cannot fill the pipe and thus carries the gas with it, which in turn affects the liquid flow rate data. Summary of the Invention

[0004] In order to improve the problem that the flow meter of the conventional centrifugal pump water medium test loop device cannot synchronize the pipeline size to reserve sufficient installation space when corresponding to large flow tests, and the pipeline size and flow rate do not match each other, resulting in cavitation, the present invention provides a large flow vertical centrifugal pump water medium test loop device.

[0005] The present invention provides a high-flow vertical centrifugal pump water medium test circuit device that adopts the following technical solutions:

[0006] A large-flow vertical centrifugal pump water medium test circuit device includes a main body base, a stabilizing pot for stably introducing water flow is provided on one side of the top of the main body base, a pump body for providing transmission power is connected to one side of the stabilizing pot, an end of the pump body away from the stabilizing pot is connected to a transition tank for uniform flow, and an end of the transition tank away from the outlet pipeline is provided with multiple flow measurement pipelines, and the multiple flow measurement pipelines are all connected to the stabilizing pot to form a closed test circuit.

[0007] The middle part of the outlet pipeline is provided with an adjustable tube body of adjustable size, the inner surface of the adjusting tube body is provided with a deformable inner tube body, the inner surface of the inner tube body is surrounded by a plurality of extrusion layers, and ring plates for applying deformation pressure to the inner tube body are provided between the inner tube body and the plurality of extrusion layers, a plurality of pressure shells are plugged into the outer surface of the adjusting tube body, and a tightening belt for shrinking the inner tube body is provided around the surfaces of the plurality of pressure shells, the plurality of pressure shells pass through the adjusting tube body and are fixedly connected to the inner tube body, and the plurality of pressure shells and the plurality of ring plates are all centrally aligned one by one to form a power transmission relationship.

[0008] By adopting the above technical solution, multiple flow measurement pipelines are connected to the transition tank, so that the water flow transmitted by the outlet pipeline is divided into multiple parts for separate measurement, and the total measurement value is formed by adding up the multiple measurement values. Under the premise of ensuring the accuracy of the measurement data, the flow measurement pipeline is split into multiple parts, thereby reducing the overall occupied space and solving the problem of insufficient flow meter installation space. At the same time, the tightening belt is tightened to apply pressure to multiple pressure shells, so that the pressure shells are pressed into the ring plate to generate pressure. The ring plate receives the pressure and presses into the extrusion layer, thereby reducing the internal size of the extrusion layer. As the tightening belt is tightened, the gas in the pressure shell is discharged, and then discharged into the inner tube body to cause deformation, and then fills the gaps between the multiple extrusion layers, so that the overall size of the pipeline is reduced while keeping the inner wall smooth, thereby adjusting the pipeline size to match the liquid flow rate and avoiding the problems of bubbles and cavitation.

[0009] Preferably, an inlet pipeline is provided at the output end of the swell tank, and the end of the inlet pipeline away from the swell tank is connected to the pump body. An outlet pipeline is provided at the end of the pump body away from the inlet pipeline, and the end of the outlet pipeline away from the pump body is connected to the transition tank.

[0010] By adopting the above technical solution, the inlet pipeline connects the flow stabilization tank and the pump body, and the outlet pipe connects the pump body and the transition tank, thereby forming a loop sealed circulation of the device and providing a circulation space for the flow of the test liquid.

[0011] Preferably, two fixed protrusions are provided on one end of the surface of the adjusting tube body, and a self-locking motor is fixed on the outer surface of one of the fixed protrusions, and the output end of the self-locking motor is located between the two fixed protrusions, and a transmission tooth fixedly connected to the output end of the self-locking motor is rotatably provided between the two fixed protrusions.

[0012] By adopting the above technical solution, the transmission tooth is rotatably arranged between the two fixed protrusions to maintain rotation, and at the same time the output end of the self-locking motor is fixedly connected to the transmission tooth to provide power.

[0013] Preferably, a rotating groove is provided on the side of the surface of the adjusting tube body away from the self-locking motor, and a rotating rod is rotatably arranged in the rotating groove. The surface of the rotating rod is fixedly connected to the two ends of the tightening belt, and one end of the surface of the rotating rod is movably passed through and located between two fixed protrusions. The penetrating surface of the rotating rod is provided with a gear that meshes with the transmission teeth.

[0014] By adopting the above technical solution, the opening of the rotating groove reserves space for the rotation of the rotating rod, and at the same time, the rotating rod rotates to reel in the tightening belts at both ends, so that the rotating groove reserves storage space for the tightening belt of the reeled part, and the gear at one end of the rotating rod engages with the transmission tooth, thereby receiving the rotational force of the transmission tooth for synchronous rotation to provide power.

[0015] Preferably, slots are provided through the surface of the regulating tube body at the positions of the multiple pressure shells, and air ports are provided on the surface of the inner tube body at the positions of the multiple slots.

[0016] By adopting the above technical solution, the opening of the slot provides an insertion space for the installation of the pressure shell, so that the pressure shell is inserted into the air port through the slot to be fixed, and the bottom of the air port is located in the center of the inner tube body, thereby facilitating the subsequent transmission of thrust.

[0017] Preferably, one side of the bottom of each of the plurality of air ports is provided with an air guide cavity inwardly, and the inner tube body is provided with a deformable and expandable filling bag at the bottom of each of the plurality of air guide cavities.

[0018] By adopting the above technical solution, gas flows into the gas guide cavity from the gas port and then enters the filling bag. The filling bag receives the gas and is located on the inner wall of the extrusion layer to expand, and abuts against the deformed side wall of the extrusion layer to form a seal.

[0019] Preferably, the multiple pressure shells are inserted into the multiple slots one by one and fixed to the bottom of the multiple air ports one by one. The multiple pressure shells are provided with air storage cavities inwardly, and the air storage cavities are elastically connected with pressure blocks. The multiple air storage cavities pass through the pressure shells and are connected to the multiple air guide cavities one by one.

[0020] By adopting the above technical solution, the pressure block is pressed into the air storage groove under pressure. When the pressure block is located at the bottom of the air storage groove, the gas in the air storage groove enters the filling bag through the air guide cavity. At the same time, the pressure block drives the pressure shell to apply pressure to the inner tube body, thereby pushing the ring plate downward.

[0021] Preferably, arc-shaped extension grooves are provided inside the plurality of ring plates, arc-shaped extension plates are inserted at both ends of the plurality of extension grooves, and a torsion spring is connected between the two extension plates.

[0022] By adopting the above technical solution, the torsion spring is stretched to apply thrust to the two extension plates, so that the two extension plates extend along the extension groove and normally remain in the extended state. When the ring plate moves downward under pressure, the two extension plates abut against the extrusion layer and are pressed into the extension groove. At the same time, the part of the extrusion layer where the extension plate is pressed is synchronously extruded and deformed, so that the inner walls of multiple extrusion layers remain arc-shaped.

[0023] Preferably, a flow meter for testing water flow rate is provided in the middle of the plurality of flow measurement pipelines, and a control valve is provided at a position between the side of the plurality of flow measurement pipelines away from the flow meter and the docking end of the simmering tank.

[0024] By adopting the above technical solution, the control valve is set in the flow measurement pipeline for opening and closing, thereby controlling the water flow in the transition tank to be discharged into the stabilization tank. At the same time, multiple flow measurement pipelines are regulated by opening and closing different numbers of control valves, thereby affecting the water flow rate to facilitate testing.

[0025] Preferably, the simmering tank is docked with an overflow pipeline on one side adjacent to the inlet pipeline, the overflow pipeline is docked with the pump body, the simmering tank is docked with an inlet pipe at the other end relative to the overflow pipeline, and a plurality of flow measurement pipelines are provided in the middle of an outlet pipe docked with an external cooling device.

[0026] By adopting the above technical solution, the overflow pipe connects the pump body and the stabilizing tank, so that the overflow water in the pump body flows back into the stabilizing tank, thereby reducing the internal pressure of the circuit. At the same time, the outlet pipe is connected to the external cooling device, so that the water flow in the flow detection pipeline is discharged to the outside for cooling, and then connected to the stabilizing tank through the inlet pipe to keep the temperature of the water flow in the circuit stable.

[0027] In summary, the present invention includes at least one of the following beneficial technical effects:

[0028] 1. Use multiple flow measurement pipelines to divert the water flow discharged from the outlet pipeline, and then use multiple control valves to regulate the opening and closing of the flow measurement pipeline. In conjunction with the flow meter installed in the middle of each flow measurement pipeline, the pumping performance of the pump body is effectively released, and the water flow is distributed according to the different flow rates extracted by the pump body to ensure the accuracy of the flow measurement data. At the same time, the splitting of multiple flow measurement pipelines reduces the overall occupied area and reserves a fixed space for the installation of the flow meter.

[0029] 2. By means of a tightening belt, pressure is applied to the pressure shell to deform the extrusion layer of the ring plate. The deformation of multiple extrusion layers reduces the range of the inner wall of the pipeline. At the same time, when the pressure block is pressed into the air storage cavity, the gas is transported to the filling bag to cause expansion. The expanded filling bag abuts against the multiple deformed extrusion layers, thereby sealing the gap between the filling bag and the extrusion layer and making the inner diameter of the pipeline smooth. Therefore, the inner diameter size of the pipeline can be changed according to the flow rate, so that the inner diameter size is adapted to the flow rate, thereby reducing redundant cavities. In conjunction with the secondary slow flow of the transition tank, problems such as bubbles and cavitations in the water flow can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A top view of the present invention;

[0031] Figure 2 It is a front view of the present invention;

[0032] Figure 3 It is a left side view of the present invention;

[0033] Figure 4 This is the structural installation diagram of location A of the present invention;

[0034] Figure 5 This is an exploded view of the regulating tube body of the present invention;

[0035] Figure 6 This is a cross-sectional view of the interior of the regulating tube body of the present invention;

[0036] Figure 7 This is a cross-sectional view of the adjustment tube body of the present invention;

[0037] Figure 8 This is the front view of the adjustment tube body of the present invention.

[0038] Reference numerals: 1, main body base; 2, flow stabilizing tank; 3, inlet pipe; 4, pump body; 5, outlet pipe; 6, transition tank; 7, flow measurement pipe; 8, flow meter; 9, inlet pipe;

[0039] 10. Outlet pipe; 11. Overflow pipe; 12. Control valve; 13. Adjustment pipe body; 14. Inner pipe body; 15. Extrusion layer; 16. Tightening belt; 17. Fixing bump; 18. Transmission gear; 19. Self-locking motor;

[0040] 20. Rotating rod; 21. Rotating groove; 22. Slot; 23. Pressure shell; 24. Air storage cavity; 25. Pressure block; 26. Ring plate; 27. Extension plate; 28. Extension groove; 29. ​​Torsion spring;

[0041] 30. Air port; 31. Air guide cavity; 32. Filling bag; 33. Installation cavity. DETAILED DESCRIPTION

[0042] The following is combined with Figures 1-8 The present invention is described in further detail.

[0043] The embodiment of the present invention discloses a water medium test loop device for a large-flow vertical centrifugal pump.

[0044] Example 1

[0045] Reference Figure 1 、 Figure 3 , a large-flow vertical centrifugal pump water medium test circuit device, including a main body base 1, a simmering pot 2 is fixed on one side of the upper end surface of the main body base 1 by a bracket, the inlet end of the simmering pot 2 is connected and docked with an inlet pipe 9, the other end of the inlet pipe 9 relative to the simmering pot 2 is connected with an external water supply mechanism and a refrigeration mechanism, the upper end surface of the main body base 1 is located on one side of the simmering pot 2 with screws fixed with a pump body 4, the inlet end of the pump body 4 is connected and docked with an inlet pipe 3, and the other end of the inlet pipe 3 relative to the pump body 4 is connected and docked with the outlet end of the simmering pot 2, and at the same time, the overflow port on the side surface of the pump body 4 is connected and docked with an overflow pipe 11, and the overflow pipe 11 is connected to the docking of the simmering pot 2 relative to the other end of the pump body 4, so that the excess water in the pump body 4 is discharged into the simmering pot 2, thereby releasing the excess pressure;

[0046] An outlet end is provided on the surface of the pump body 4 on the other side relative to the overflow port, and the outlet end of the pump body 4 is connected and docked with an outlet pipe 5. A transition tank 6 is screwed to the end of the outlet pipe 5 on the upper end surface of the main body base 1. The outlet pipe 5 is connected and docked with the inlet end of the transition tank 6 relative to the other end of the pump body 4. A plurality of outlet ends are provided on one side of the outer surface of the transition tank 6, and a flow measuring pipe 7 is docked and provided at each outlet end (at least three flow measuring pipes 7 are provided). The other end of each flow measuring pipe 7 relative to the transition tank 6 is docked and connected with the stabilizing tank 2, and a flow measuring pipe 7 located in the middle is docked and connected with the outlet pipe 10. The outlet pipe 10 is connected to an external cooling mechanism relative to the other end of the flow measuring pipe 7, thereby discharging the water flow in the flow measuring pipe 7 for cooling treatment.

[0047] It should be noted that a flow meter 8 is installed on the middle surface of each flow measuring pipeline 7, and the measuring end of each flow meter 8 passes through the flow measuring pipeline 7 and is located inside the pipeline in direct contact with the water flow. A control valve 12 for opening and closing is provided at the interface between each flow measuring pipeline 7 and the transition tank 6. At the same time, the diameter of the inlet pipeline 3 is set to DN900, and the diameter of the outlet pipeline 5 is normally set to DN800. When there are three flow measuring pipelines 7, the diameter is set to DN500, and the diameter of the flow measuring pipeline 7 is adjusted according to the number.

[0048] The implementation principle of a large-flow vertical centrifugal pump water medium test circuit device in an embodiment of the present invention is: when using the device, the personnel first connect the inlet pipe 9 with the refrigeration mechanism, and then connect the outlet pipe 10 with the refrigeration structure to connect the simmering tank 2, pump body 4, transition tank 6 and the remaining pipelines to form a closed test circuit, and water is injected into the circuit. When the liquid level of the pump body 4 and the simmering tank in the circuit reaches the test standard, the water injection is stopped. Then, personnel send a signal through the microcomputer to control the operation of the pump body 4. The impeller in the pump body 4 rotates to do work on the liquid, and the water at the inlet is transported to the outlet pipe 5. The outlet pipe 5 transmits the water flow and transports it to the transition tank 6. The fluid reduces the buffer pressure in the transition tank 6 and helps eliminate the bubbles in the fluid. As the pump body 4 continues to transport the water flow, thrust is formed to transport the water flow to the flow measurement pipe 7. During this period, personnel can open and close the three control valves 12 to make the three flow measurement pipes 7 in different open and closed states, so as to test data at different flow rates. The water flows into the flow measurement pipe 7 and contacts the measuring end of the flow meter 8, thereby feeding back data such as the suction force of the pump body 4. After the measurement is completed, the fluid flows back to the simmering tank 2 through the control valve 12 in the open state. The three flow measurement pipes 7 thus set up perform diversion detection on the water flow transmitted by the outlet pipe 5, forming a spacing space between the three flow measurement pipes 7, thereby reserving sufficient installation space for the flow meter.

[0049] When the water temperature increases, part of the water is discharged from the outlet pipe 10 to the external refrigeration mechanism for cooling, and then the cooled water is mixed with the water in the inlet pipe 9 and transported to the stabilizing tank 2, thereby maintaining the temperature of the water in the device stable.

[0050] Example 2

[0051] Reference Figure 2 、 Figure 4 、 Figure 5 , the difference between this embodiment and embodiment 1 is that the outlet pipe 5 is composed of an adjusting tube body 13, an inner tube body 14 and an extruded layer 15. The adjusting tube body 13 is covered on the outer surface of the inner tube body 14. The adjusting tube body 13 is made of silicone rubber with a certain hardness. The inner tube body 14 and the extruded layer 15 are both made of synthetic rubber and are easily deformed under pressure. The inner wall of the inner tube body 14 is provided with four protrusions made of silicone wire material, and the four protrusions are sealed and fixed to the extruded layer 15. At the same time, the outer surface of the inner tube body 14 is fixed to the inner wall of the adjusting tube body 13 at the positions of the four protrusions. A rotating groove 21 is opened inwardly in the middle of the outer surface of the adjusting tube body 13. The inner wall of the rotating groove 21 is rotatably connected to a rotating rod 20. Two fixed protrusions 17 are fixed on the outer surface of the adjusting tube body 13 on one side of the rotating groove 21. A groove is opened inwardly in the adjusting tube body 13 between the two fixed protrusions 17. A transmission tooth 18 is rotatably provided between the two fixed protrusions 17 and above the rotating rod 20.

[0052] It should be noted that one end of the rotating rod 20 is movable through a fixed protrusion 17 located in the groove, and the surface of the rotating rod 20 located in the groove is provided with a gear, and the tooth surface of the transmission tooth 18 is engaged with the gear of the rotating rod 20. At the same time, a tightening belt 16 is wrapped around the outer surface of the adjusting tube body 13, and the two end breaks of the tightening belt 16 are respectively fixed to the rod surface of the rotating rod 20, and then a self-locking motor 19 is screwed to the side surface of a fixed protrusion 17 away from the rotating groove 21, and the output end of the self-locking motor 19 is movable through the fixed protrusion 17 and fixed to the rod of the transmission tooth 18.

[0053] The output shaft of the self-locking motor 19 drives the transmission teeth 18 to rotate, so that the gear meshing with the transmission teeth 18 drives the rotating rod 20 to rotate. As the rotating rod 20 rotates, the tightening belt 16 is wrapped and tightened along the surface of the rotating rod 20, thereby providing a power source for pressing the gas into the inner tube body 14. At the same time, the adjustment tube body 13 is set in the outermost layer, thereby providing support for the deformation of the inner tube body 14 inside, and the adjustment tube body 13 is integrally sleeved on the outer surface of the inner tube body 14, thereby forming a limit for the inner tube body 14. The four protrusions set on the inner surface of the inner tube body 14 have a high density and a certain support, so that the inner tube body 14 itself remains unchanged when it is deformed, providing an installation fulcrum for the fixation of the extrusion layer 15.

[0054] Reference Figure 6 Figure 7 、 Figure 8 The outer surface of the adjusting tube body 13 is provided with four slots 22 around the position where the tightening belt 16 is wrapped, and a pressure shell 23 is movably inserted in each slot 22. At the same time, the inner tube body 14 is provided with air ports 30 at the positions of the four slots 22. The bottoms of the air ports 30 are all penetrated by the side surface of the inner tube body 14 to form an air guide cavity 31. The air guide cavity 31 has an arc-shaped cavity, and a filling bag 32 is provided at the end of the air guide cavity 31 near the inner surface of the inner tube body 14. At the same time, the bottoms of the four pressure shells 23 are fixed one by one with the bottoms of the four air ports 30, and the upper end surfaces of the four pressure shells 23 are all provided with air storage cavities 24 inwardly. The bottoms of the four air storage cavities 24 are penetrated by the side walls of the pressure shell 23 and connected with the openings of the air guide cavity 31. The four air storage cavities 24 are elastically connected with pressure blocks 25. The side surfaces of the pressure blocks 25 and the inner walls of the air storage cavities 24 are filled with lubricant to keep smooth movement while forming a seal to prevent gas leakage.

[0055] It should be noted that, under normal circumstances, the pressure block 25 protrudes from the top of the pressure shell 23, and a certain space is reserved between the four extrusion layers 15 and the inner tube body 14 to form an installation cavity 33. An annular plate 26 is provided in each of the four installation cavities 33. The tops of the four annular plates 26 are fixedly connected to the inner wall of the installation cavity 33 close to the inner tube body 14. An arc-shaped expansion groove 28 is provided inside the four annular plates 26. Two expansion plates 27 with the same curvature are inserted in the expansion groove 28. The two expansion plates 27 are elastically connected by a torsion spring 29. At the same time, the filling bag 32 is a flat rectangle under normal circumstances, and can expand and stretch when filled with gas.

[0056] The tightening belt 16 is tightened to apply pressure to the four pressure blocks 25. The four pressure blocks 25 are pressed into the air storage cavity 24 under pressure. The air storage cavity 24 and the air port 30 are in a connected state, thereby transporting the gas in the air storage cavity 24 to the air port 30. After the gas enters the air port 30, it is rushed into the filling bag 32 through the air guide cavity 31, causing the filling bag 32 to expand and deform as a whole, thereby forming an elliptical bulge. As the pressure block 25 is fully inserted into the bottom of the air storage cavity 24, pressure is applied to the pressure shell 23 as a whole, and the pressure The bottom of the shell 23 is fixedly connected to the air port 30, and the ring plate 26 in the mounting cavity 33 is in a center-aligned state with the pressure shell 23, so that the ring plate 26 receives the pressure applied by the pressure shell 23. At the same time, the inner tube body 14 is deformed by the pressure, so that the ring plate 26 is pressed into the extrusion layer 15 and deformed, thereby reducing the inner diameter of the extrusion layer 15. As the extrusion layer 15 is reduced, the gap between the two adjacent extrusion layers 15 is filled by the bulge of the filling bag 32, so that the inner diameter of the pipe after reduction tends to be smooth and convenient for water transmission.

[0057] Among them, the device also includes a stabilizing tank 2, a transition tank 6, a flow meter 8, a control valve 12, a self-locking motor 19, an externally provided water supply mechanism and a refrigeration mechanism, which are all existing technologies, and their structural principles are not repeated here.

[0058] The implementation principle of Example 2 is as follows: when water flows into the regulating tube body 13 of the outlet pipe 5, personnel can adjust it according to the water flow rate input by the inlet pipe 9, thereby sending a signal to control the operation of the self-locking motor 19, and the self-locking motor 19 drives the transmission gear 18 to rotate, and the transmission gear 18 drives the gear of the rotating rod 20 to rotate synchronously. The rotating rod 20 rotates so that the two ends of the tightening belt 16 are wrapped around the surface of the rotating rod 20, so that the tightening belt 16 as a whole shrinks around the regulating tube body 13. As the tightening belt 16 shrinks, pressure is applied to the four pressure blocks 25. As the four pressure blocks 25 are pressed into the air storage cavity 24, the gas in the air storage cavity 24 is input into the air guide cavity 31 through the air port 30, and finally enters the filling bag 32, causing the filling bag 32 to expand into an elliptical shape;

[0059] When the pressure block 25 is fully pressed into the air storage cavity 24, pressure is applied to the entire pressure shell 23. The pressure on the pressure shell 23 simultaneously applies pressure to the bottom of the air port 30, pushing the ring plate 26 along the inner surface of the inner tube 14. The four ring plates 26 squeeze the extrusion layer 15 from four directions, causing it to shrink. As the ring plates 26 and the extrusion layer 15 squeeze, the expansion plates 27 on both sides of the ring plates 26 are subjected to interaction forces and pressed into the expansion grooves 28, thereby smoothing the deformed surface of the extrusion layer 15. The four deformed extrusion layers 15 abut against the four inflated filling bladders 32, forming a reduced inner diameter of the outlet pipe 5. This can be adjusted according to the different flow rates of water drawn into the pump body 4, so that the pipe inner diameter is adapted to the water flow rate, thereby avoiding water bubbles formed by excessive cavities and releasing the pump body 4's suction performance, thus improving the test data.

[0060] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A high-flow vertical centrifugal pump water medium test circuit device, characterized by: The invention comprises a main body base (1), a stabilizing pot (2) for stably introducing water flow is provided on one side of the top of the main body base (1), a pump body (4) for providing transmission power is connected to one side of the stabilizing pot (2), an end of the pump body (4) away from the stabilizing pot (2) is connected to a transition pot (6) for uniform flow, and an end of the transition pot (6) away from the outlet pipe (5) is provided with a plurality of flow measurement pipes (7), and the plurality of flow measurement pipes (7) are all connected to the stabilizing pot (2) to form a closed test loop. The middle part of the outlet pipe (5) is provided with an adjustable tube body (13), the inner surface of the adjusting tube body (13) is provided with a deformable inner tube body (14), the inner surface of the inner tube body (14) is surrounded by a plurality of extrusion layers (15), and a ring plate (26) for applying deformation pressure to the inner tube body (14) is provided between the inner tube body (14) and the plurality of extrusion layers (15). The outer surface of the adjusting tube body (13) is provided with a plurality of pressure shells (23) inserted therein, and the surfaces of the plurality of pressure shells (23) are surrounded by a tightening belt (16) for shrinking the inner tube body (14). The plurality of pressure shells (23) pass through the adjusting tube body (13) and are fixedly connected to the inner tube body (14), and the plurality of pressure shells (23) and the plurality of ring plates (26) are all aligned one by one in the center to form a power transmission relationship.

2. A high-flow vertical centrifugal pump water medium test circuit device according to claim 1, characterized in that: An inlet pipe (3) is provided at the output end of the swell tank (2), and an end of the inlet pipe (3) away from the swell tank (2) is connected to a pump body (4). An outlet pipe (5) is provided at the end of the pump body (4) away from the inlet pipe (3), and an end of the outlet pipe (5) away from the pump body (4) is connected to a transition tank (6).

3. A high-flow vertical centrifugal pump water medium test circuit device according to claim 2, characterized in that: Two fixed protrusions (17) are provided on one end of the surface of the regulating tube body (13), a self-locking motor (19) is fixedly provided on the outer surface of one of the fixed protrusions (17), an output end of the self-locking motor (19) passes through and is located between the two fixed protrusions (17), and a transmission tooth (18) fixedly connected to the output end of the self-locking motor (19) is rotatably provided between the two fixed protrusions (17).

4. A high-flow vertical centrifugal pump water medium test circuit device according to claim 3, characterized in that: A rotating groove (21) is provided on the side of the surface of the regulating tube body (13) away from the self-locking motor (19), and a rotating rod (20) is rotatably arranged in the rotating groove (21). The surface of the rotating rod (20) is fixedly connected to the two ends of the tightening belt (16), and one end of the surface of the rotating rod (20) is movably passed through and located between the two fixed protrusions (17). The penetrating surface of the rotating rod (20) is provided with a gear meshing with the transmission tooth (18).

5. A high-flow vertical centrifugal pump water medium test circuit device according to claim 4, characterized in that: The surface of the regulating tube body (13) is provided with slots (22) at the positions of the multiple pressure shells (23), and the surface of the inner tube body (14) is provided with air ports (30) at the positions of the multiple slots (22).

6. A high-flow vertical centrifugal pump water medium test circuit device according to claim 5, characterized in that: An air guide cavity (31) is provided inwardly on one side of the bottom of each of the plurality of air ports (30), and a deformable and expandable filling bag (32) is provided on the bottom of each of the plurality of air guide cavities (31) on the inner tube body (14).

7. A high-flow vertical centrifugal pump water medium test circuit device according to claim 6, characterized in that: The plurality of pressure shells (23) are inserted into the plurality of slots (22) one by one and fixed to the bottoms of the plurality of air ports (30) one by one. The plurality of pressure shells (23) are provided with air storage cavities (24) inwardly, and the air storage cavities (24) are elastically connected with pressure blocks (25). The plurality of air storage cavities (24) pass through the pressure shells (23) and are connected to the plurality of air guide cavities (31) one by one.

8. The high-flow vertical centrifugal pump water medium test circuit device according to claim 7, characterized in that: The inside of the plurality of ring plates (26) is provided with arc-shaped stretching grooves (28), both ends of the plurality of stretching grooves (28) are plugged with arc-shaped expansion plates (27), and a torsion spring (29) is connected between the two expansion plates (27).

9. A high-flow vertical centrifugal pump water medium test circuit device according to claim 8, characterized in that: A flow meter (8) for testing water flow velocity is provided in the middle of each of the plurality of flow measurement pipelines (7), and a control valve (12) is provided at a position between a side of each of the plurality of flow measurement pipelines (7) away from the flow meter (8) and the butt end of the simmering tank (2).

10. A high-flow vertical centrifugal pump water medium test circuit device according to claim 9, characterized in that: The simmering tank (2) is located on one side adjacent to the inlet pipeline (3) and is docked with an overflow pipeline (11); the overflow pipeline (11) is docked with the pump body (4); an inlet pipe (9) is docked with the other end of the simmering tank (2) relative to the overflow pipeline (11); and a plurality of outlet pipes (10) docked with an external cooling device are provided in the middle of the flow measurement pipelines (7).

Images