An experimental device to simulate the impact of seawater fluctuations on pipelines in deep-sea mining

Abstract

The present invention relates to a deep-sea mining experimental equipment. The technical scheme is: an experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining, characterized in that: the experimental device comprises a water tank and a water tank that are upright and interconnected through a first pipeline, the outlet of the water tank is connected to a mixer through a second pipeline; the outlet of the mixer is connected to a wastewater collection tank through a sixth pipeline, and is connected to the inlet of an experimental centrifugal pump through a fourth pipeline; the outlet of the experimental centrifugal pump is connected to the input port of a solid-liquid separator through a fifth pipeline; the liquid outlet of the solid-liquid separator is facing the inlet of the water tank, and the solid outlet of the solid-liquid separator is aligned with a vertically arranged particle box; the outlet of the particle box is connected to a vertically arranged third pipeline to output particles, and the second pipeline is bypassed through a three-way valve; the experimental centrifugal pump is driven by a first motor. The experimental device can simulate the influence of different fluctuation conditions of seawater on the performance of pipelines and experimental centrifugal pumps.

Description

Technical Field

[0001] The invention relates to deep sea mining experimental equipment, in particular to an experimental device for simulating the influence of seawater fluctuation on pipelines during deep sea mining. Background Art

[0002] Since the 1960s, the world's major powers have attached increasing importance to the exploration and development of deep-sea resources. Therefore, the study of deep-sea mining hydraulic lifting systems has become very meaningful. The mining system is in a marine environment, where the lifting pipe will bear a large axial load under the action of its own weight, the gravity of the pump group and the relay chamber. At the same time, it will be affected by dynamic loads such as waves, currents and the towing of mining ships, which aggravates the axial load of the lifting pipe. The impact on the lifting pipe will further affect the performance and lifting efficiency of the lifting pump in the mining system. Therefore, studying the impact of seawater fluctuations on pipelines plays an important role in improving the working efficiency of deep-sea mining hydraulic lifting systems. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and to propose an experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining; the experimental device can simulate the influence of different seawater fluctuation conditions on pipelines and experimental centrifugal pump performance.

[0004] The technical solution provided by the present invention is: an experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining, characterized in that: the experimental device comprises a water tank and a water tank which are upright and interconnected through a first pipe, the outlet of the water tank is connected to a stirrer through a second pipe; the outlet of the stirrer is connected to a wastewater collection tank through a sixth pipe, and is connected to an inlet of an experimental centrifugal pump through a fourth pipe; the outlet of the experimental centrifugal pump is connected to an inlet of a solid-liquid separator through a fifth pipe; the liquid outlet of the solid-liquid separator is directly opposite to the inlet of the water tank, and the solid outlet of the solid-liquid separator is aligned with a vertically arranged particle box; the outlet of the particle box is connected to a vertically arranged third pipe to output particles, and the second pipe is bypassed through a three-way valve; the experimental centrifugal pump is driven by a first motor;

[0005] All the above components are fixed on the frame;

[0006] In addition, the exciter is installed on the frame through a spring, and the exciter acts on the outer wall of the fifth vertical section of the pipeline through a mechanical sensor to simulate the impact of waves on the ore lifting hard pipe in seawater;

[0007] An inlet pressure sensor and an outlet pressure sensor are respectively arranged at the inlet and outlet parts of the experimental centrifugal pump so as to calculate the performance curve of the experimental centrifugal pump through the measured pressure.

[0008] A filter screen is installed at the water tank inlet.

[0009] The fourth pipeline and the sixth pipeline are respectively equipped with switch valves.

[0010] The motor shaft axis of the first motor is arranged vertically.

[0011] The fifth pipeline is equipped with an electromagnetic flowmeter.

[0012] The working principle of the present invention is: fill the water tank with water, put particles in the particle box, the water enters the water tank through the first pipe, the particles enter the second pipe through the third pipe, and enter the mixer together with the water. The mixed liquid enters the experimental pump through the fourth pipe. The inlet and outlet of the pump are both provided with pressure sensors, and the performance curve of the pump is calculated by the measured pressure. An exciter and an electromagnetic flowmeter are provided on the fifth pipe to simulate the impact of seawater fluctuations on the pipe. The mixed liquid enters the solid-liquid separator through the fifth pipe, wherein water enters the water tank through the filter screen, and the particles enter the particle box through the extrusion screw. The solid and liquid phases are separated.

[0013] The beneficial effects of the present invention are as follows: the present invention can directly study the influence of seawater fluctuations in deep-sea mining on pipelines and the influence on the performance of experimental centrifugal pumps in the laboratory, and can also separate and recycle experimental particles and water, thereby saving a lot of manpower and material resources and significantly improving the research work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the system layout structure of the present invention.

[0015] The figure includes: 1. the first motor; 2. the coupling; 3. the experimental centrifugal pump; 4. the first bracket; 5. the inlet pressure sensor; 6. the outlet pressure sensor; 7. the fourth pipeline; 8. the second bracket; 9. the switch valve; 10. the switch valve; 11. the sixth pipeline; 12. the wastewater collection tank; 13. the third bracket; 14. the switch valve; 15. the water tank; 16. the first pipeline; 17. the second motor; 18. the switch valve; 19. the water tank; 20. the solid-liquid separator; 21. the filter screen; 22. the extrusion screw; 23. the particle box; 24. the three-way valve; 25. the third pipeline; 26. the second pipeline; 27. the mixer; 28. the third motor; 29. ​​the fifth pipeline; 30. the electromagnetic flowmeter; 31. the spring; 32. the exciter; 33. the mechanical sensor. Specific implementation methods

[0016] The following is a further description of the embodiments described in conjunction with the accompanying drawings.

[0017] Figure 1In the experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining shown in the figure, the experimental centrifugal pump 3 and the first motor 2 are fixed by the first bracket 4, and the first motor is connected to the rotating shaft of the experimental centrifugal pump by the coupling 2. The inlet pressure sensor 5 and the outlet pressure sensor 6 are respectively installed at the inlet and outlet pipes of the experimental centrifugal pump. The exciter 32 is connected to the spring 31 and acts on the fifth pipe 29 through the mechanical sensor 33. The electromagnetic flowmeter 30 is also installed on the fifth pipe 29 to measure the flow rate of the mixed liquid. The solid-liquid separator 20 is driven by the second motor 17, and the mixer 27 is driven by the third motor 28, and they are all fixed by the second bracket 8. The water tank is fixed by the third bracket 13. The frame includes a first bracket, a second bracket, and a third bracket.

[0018] After the experiment starts, open the switch valve 18 on the first pipeline, and the water in the water tank 15 enters the water tank 19, and then enters the second pipeline 26. By adjusting the three-way valve 24, the particles enter the second pipeline from the third pipeline 25 to mix with water. The mixed liquid will then enter the mixer 27 for full mixing. At this time, close the switch valve 10, open the switch valve 9, and the mixed liquid will flow into the fourth pipeline 7; then the mixed liquid will enter the experimental centrifugal pump 3, and enter the fifth pipeline 29 through the experimental centrifugal pump 3. The inlet pressure sensor 5 and the outlet pressure sensor 6 will record the changes in the inlet and outlet pipeline pressures of the experimental centrifugal pump 3. We can also adjust the frequency of the exciter 32, and act on the pipeline through the mechanical sensor 33 to cause the pipeline to vibrate slightly; in this way, the fluctuation frequency of seawater is simulated, and then the impact of seawater on the pipeline under different working conditions is simulated. The electromagnetic flowmeter 30 will record the flow in the fifth pipeline 29. After that, the mixed liquid will enter the solid-liquid separator 20, the water will enter the water tank through the filter 21 under the action of gravity, and the particles will enter the particle box 23 under the action of the extrusion screw 22 in the solid-liquid separator. This cycle will be repeated until the end of the experiment.

[0019] After the experiment, the three-way valve 24 can be adjusted to allow the particles to be discharged through the bottom of the third pipe 25. After the water enters the second pipe 26 through the water tank 19, it will enter the mixer 27, which will take out the particles remaining in the mixer and clean the mixer. At this time, close the switch valve 9, open the switch valve 10, and the water and the remaining particles will enter the sixth pipe 11, and finally enter the wastewater collection tank 12 for discharge. Finally, open the switch valve 14, and the water in the water tank can flow out through the pipe at the bottom of the water pipe and be recycled.

Claims

1. An experimental device for simulating the impact of seawater fluctuations on pipelines during deep-sea mining, characterized in that: The experimental device comprises a water tank (15) and a water box (19) which are vertically connected to each other through a first pipe (16); the outlet of the water box is connected to a mixer (27) through a second pipe (26); the outlet of the mixer is connected to a wastewater collection box (12) through a sixth pipe (11), and is connected to an inlet of an experimental centrifugal pump (3) through a fourth pipe (7); the outlet of the experimental centrifugal pump is connected to an input port of a solid-liquid separator (20) through a fifth pipe (29); the liquid outlet of the solid-liquid separator faces the inlet of the water tank, and the solid outlet of the solid-liquid separator faces a vertically arranged particle box (23); the outlet of the particle box is connected to a vertically arranged third pipe to output particles, and bypasses the second pipe (26) through a three-way valve (24); the experimental centrifugal pump (3) is driven by a first motor; All the above components are fixed on the frame; In addition, the vibrator (32) is mounted on the frame via a spring (31), and the vibrator acts on the outer wall of the fifth vertical section of the pipeline via a mechanical sensor (33) to simulate the influence of waves on the ore lifting pipe in seawater; An inlet pressure sensor (5) and an outlet pressure sensor (6) are respectively arranged at the inlet and outlet of the experimental centrifugal pump, so as to calculate the performance curve of the experimental centrifugal pump (3) through the measured pressures.

2. The experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining according to claim 1 is characterized in that: A filter screen (21) is installed at the water tank inlet.

3. The experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining according to claim 2 is characterized in that: The fourth pipeline and the sixth pipeline are respectively equipped with switch valves.

4. The experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining according to claim 3 is characterized in that: The motor shaft axis of the first motor is arranged vertically.

5. The experimental device for simulating the influence of seawater fluctuations on pipelines in deep-sea mining according to claim 4 is characterized in that: An electromagnetic flowmeter (30) is installed on the fifth pipeline.

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