Liquid-solid lifting circulation experiment system for deep-sea mining

Abstract

The invention relates to the technical field of deep-sea mining experiment equipment, and discloses a deep-sea mining liquid-solid lifting circulation experiment system which comprises a rack, a controller, a circulation water supply mechanism, a hydraulic lifting observation mechanism, a material separation mechanism and a collection camera. The discharging end of the circulating water conveying mechanism is connected with the feeding end of the hydraulic lifting observation mechanism, the feeding end of the circulating water conveying mechanism is connected with the discharging end of the material separation mechanism, the discharging end of the hydraulic lifting observation mechanism is connected with the feeding end of the material separation mechanism, and the liquid outlet end of the material separation mechanism is connected with the liquid inlet end of the circulating water conveying mechanism. The collection camera is installed on the hydraulic lifting observation mechanism, and the circulating water feeding mechanism, the material separation mechanism and the collection camera are all connected with the controller. According to the invention, the test result can be efficiently, intuitively and accurately obtained, and the behavior characteristics and optimization strategies of solid particles in the hydraulic lifting process can be conveniently and deeply studied.

Description

Technical Field

[0001] The invention relates to the technical field of deep-sea mining experimental equipment, and in particular to a deep-sea mining liquid-solid lifting circulation experimental system. Background Art

[0002] As an innovative means of fluid lifting, hydraulic conveying technology is gradually showing its great potential and unique advantages in multiple industrial fields. This technology cleverly uses water as a power medium, and through the kinetic energy generated by the high-speed movement of water flow, it effectively drives the movement and suspension of solid particles, thereby realizing the vertical and even long-distance transportation of solid particles in the pipeline. This process is not only efficient and energy-saving, but also reduces the friction loss and environmental pollution problems that may be encountered in traditional transportation methods. Therefore, it is regarded as a bright new star in the future field of industrial material transportation. Especially in heavy industrial fields such as deep-sea mining, coal mining and solid slurry transportation, the application of hydraulic conveying technology is particularly significant. In deep-sea mining, facing extremely complex seabed environments and mineral deposits that are difficult to directly mine, hydraulic conveying technology can suspend ore particles and transport them to the sea surface through high-pressure water flow, greatly reducing the difficulty and cost of mining. In coal mining, this technology can efficiently mix coal powder or coal blocks with water into coal slurry, and directly transport it to the destination through pipelines, reducing dust pollution during transportation and improving production efficiency. In order to better study this technology, it is necessary to use a deep-sea mining liquid-solid lifting cycle experimental system for testing.

[0003] The existing liquid-solid mixed transport test equipment is often unable to accurately simulate and control the changes in water flow velocity, making it difficult for researchers to conduct in-depth research on the transport characteristics of solid materials under different flow rate conditions, including key parameters such as the distribution state of solid particles in the pipeline, transport concentration, and flow stability. The lack of these parameters directly affects the accurate evaluation of hydraulic transport efficiency and the possibility of optimizing equipment design for different material characteristics and transport requirements, thereby limiting the expansion of test results and application scope. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the above prior art and provide a deep-sea mining liquid-solid lifting circulation experimental system.

[0005] The objective of the present invention is achieved through the following technical scheme: a deep-sea mining liquid-solid lifting circulation experimental system comprises a frame, a controller, a circulating water supply mechanism, a hydraulic lifting observation mechanism, a material separation mechanism and a collection camera, wherein the circulating water supply mechanism, the hydraulic lifting observation mechanism and the material separation mechanism are all installed on the frame, the discharge end of the circulating water supply mechanism is connected to the feed end of the hydraulic lifting observation mechanism, the feed end of the circulating water supply mechanism is connected to the discharge end of the material separation mechanism, the discharge end of the hydraulic lifting observation mechanism is connected to the feed end of the material separation mechanism, the liquid outlet end of the material separation mechanism is connected to the liquid inlet end of the circulating water supply mechanism, the collection camera is installed on the hydraulic lifting observation mechanism, and the circulating water supply mechanism, the material separation mechanism and the collection camera are all connected to the controller.

[0006] A better choice, the material separation mechanism includes a primary separation box, a first connecting pipe, a first electric valve, a second connecting pipe, a pressure holding bin, a second electric valve and a solid material temporary storage bin, the primary separation box, the pressure holding bin and the solid material temporary storage bin are all installed on the frame, the feed end of the primary separation box is connected with the discharge end of the hydraulic lifting observation mechanism, the liquid outlet end of the primary separation box is connected with the liquid inlet end of the circulating water supply mechanism, the discharge end of the primary separation box is connected with the feed end of the pressure holding bin through the first connecting pipe, the first electric valve is installed on the first connecting pipe, the discharge end of the pressure holding bin is connected with the feed end of the solid material temporary storage bin through the second connecting pipe, the second electric valve is installed on the second connecting pipe, the discharge end of the solid material temporary storage bin is connected with the feed end of the circulating water supply mechanism, the first electric valve, the second electric valve and the solid material temporary storage bin are all connected to the controller.

[0007] A better choice is that the first-level separation box includes a liquid inlet pipe, a liquid flow pipe, a filter screen, a separation box body and a solid material diversion hopper. The separation box body is installed on the frame, and a solid feed port is provided on the top of the separation box body. The upper end of the liquid inlet pipe is connected to the hydraulic lift observation mechanism, and the lower end of the liquid inlet pipe is connected to the top of the separation box body. The filter screen is obliquely installed in the inner cavity of the separation box body, and the upper end of the filter screen is located below the liquid inlet pipe and the solid feed port, and the lower end of the filter screen is connected to the solid material diversion hopper. The solid material diversion hopper is installed in the middle of the separation box body, and the solid material diversion hopper is connected to the first connecting pipe. The liquid inlet end of the circulating water supply mechanism is connected to the bottom of the separation box body through the liquid flow pipe.

[0008] A more preferred option is that the primary separation box also includes a side observation window, which is installed on the separation box body, and the side observation window corresponds to the connection between the filter plate and the solid material guide bucket.

[0009] A better choice is that the solid material temporary storage bin includes a bin body, a screw conveyor and a discharge pipe, the bin body is installed on the frame, the top of the bin body is connected to the second connecting pipe, the feed end of the circulating water supply mechanism is connected to the bottom of the bin body through the discharge pipe, the screw conveyor is installed on the discharge pipe, and the screw conveyor is connected to the controller.

[0010] More preferably, the solid material temporary storage bin further includes a second observation window, and the second upper observation window is installed on the top of the bin body.

[0011] A more preferred option is that a first upper observation window is provided on the top of the pressure-maintaining bin, and the bottom of the pressure-maintaining bin is funnel-shaped.

[0012] A better choice is that the circulating water supply mechanism includes a centrifugal pump, a liquid suction pipe, a water collecting tank, a liquid delivery pipe and a mixing liquid pipe, the centrifugal pump and the water collecting tank are both installed on the frame, the liquid inlet end of the water collecting tank is connected to the liquid outlet end of the material separation mechanism, the liquid outlet end of the water collecting tank is connected to the liquid inlet end of the centrifugal pump through the liquid suction pipe, the liquid outlet end of the centrifugal pump is connected to the liquid inlet end of the mixing liquid pipe through the liquid delivery pipe, the feeding end of the mixing liquid pipe is connected to the discharging end of the material separation mechanism, the discharging end of the mixing liquid pipe is connected to the feeding end of the hydraulic lifting and observation mechanism, and the centrifugal pump is connected to the controller.

[0013] A better choice is that the hydraulic lifting and observation mechanism includes a vertical lifting pipe, a bent pipe and a liquid delivery pipe, the lower end of the vertical lifting pipe is connected to the feed end of the circulating water supply mechanism, the bent pipe is installed on the frame, the upper end of the vertical lifting pipe is connected to the liquid delivery pipe through the bent pipe, the liquid delivery pipe is connected to the feed end of the material separation mechanism, and the acquisition camera is installed on the vertical lifting pipe.

[0014] A better choice is that the frame includes a bottom support frame, a multifunctional support frame, a vertical frame and an oblique reinforcement frame, the lower end of the multifunctional support frame and the lower end of the vertical frame are connected to the bottom support frame, the upper end of the vertical frame is connected to the bottom support frame through the oblique reinforcement frame, the hydraulic lifting and observation mechanism is installed on the vertical frame, the material separation mechanism is installed on the multifunctional support frame, and the circulating water supply mechanism is installed on the bottom support frame.

[0015] The present invention has the following advantages and beneficial effects compared with the prior art:

[0016] 1. The present invention uses a frame, a controller, a circulating water supply mechanism, a hydraulic lifting observation mechanism, a material separation mechanism and a collection camera to efficiently, intuitively and accurately obtain test results when conducting pipeline hydraulic lifting tests on solid particles, and facilitates in-depth research on the behavioral characteristics and optimization strategies of solid particles during hydraulic lifting. When conducting liquid-solid mixed transportation tests, the solid-liquid mixture after the test can be separated, and the liquid and solid can be reused. When studying the effects of different pipeline flow rates on solid lifting, no resource loss will occur, and waste of water resources can be avoided.

[0017] 2. The present invention can ensure the pressure when conveying solid materials through the primary separation box, the first connecting pipe, the first electric valve, the second connecting pipe, the pressure maintaining bin, the second electric valve and the solid material temporary storage bin, avoid water being sucked back into the first-stage separation box, and can orderly deliver the solid materials into the mixing pipe. The coordination of each stage facilitates multiple tests, so as to better judge the solid distribution under different liquid flow rates. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the deep-sea mining liquid-solid lifting circulation experimental system of the present invention;

[0019] Figure 2 It is a schematic diagram of the material separation mechanism of the deep-sea mining liquid-solid lifting circulation experimental system of the present invention;

[0020] Markings of the components in the attached drawings: 1- bottom support frame; 2- energy storage power supply; 3- centrifugal pump; 4- liquid extraction pipe; 5- liquid delivery pipe; 6- liquid mixing pipe; 7- vertical frame; 8- vertical lifting pipe; 9- bent hanging pipe; 10- liquid delivery pipe; 11- multi-functional support frame; 12- primary separation box; 13- liquid inlet pipe; 14- solid feed inlet; 15- filter screen; 16- side observation window; 17- liquid pipe; 18- water collecting box; 19- solid material diversion bucket; 20- first connecting pipe; 21- first electric valve; 22- pressure keeping bin; 23- second connecting pipe; 24- second electric valve; 25- solid material temporary storage bin; 26- feed pipe; 27- screw conveyor; 28- oblique reinforcement frame; 29- first upper observation window; 30- second upper observation window. DETAILED DESCRIPTION

[0021] The purpose of the present invention is further described in detail below with reference to the accompanying drawings and specific examples. The examples cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following examples.

[0022] like Figure 1As shown, the deep-sea mining liquid-solid lifting circulation experimental system includes a frame, a controller (not shown in the figure), a circulating water supply mechanism, a hydraulic lifting observation mechanism, a material separation mechanism, a collection camera and an energy storage power supply 2. Among them, the frame includes a bottom support frame 1, a multifunctional support frame 11, a vertical frame 7 and an oblique reinforcement frame 28. The bottom support frame 1 is placed flat on the ground, the lower end of the vertical frame 7 is vertically welded to the middle of the bottom support frame 1, the lower end of the multifunctional support frame 11 is vertically welded to the bottom support frame 1, and the multifunctional support frame 11 is located on the right side of the vertical frame 7. The upper end of the vertical frame 7 is welded to the upper end of the oblique reinforcement frame 28, the oblique reinforcement frame 28 is inclined, and the lower end of the oblique reinforcement frame 28 is obliquely welded to the end of the bottom support frame 1. The energy storage power supply 2 is installed at the left end of the bottom support frame 1 and is located on the left side of the vertical frame 7. The circulating water supply mechanism is installed on the bottom support frame 1, and the discharge end of the circulating water supply mechanism is connected to the feed end of the hydraulic lifting observation mechanism, and the feed end of the circulating water supply mechanism is connected to the discharge end of the material separation mechanism. The hydraulic lifting observation mechanism is installed on the vertical frame 7, and the material separation mechanism is installed on the multifunctional support frame 11. The discharge end of the hydraulic lifting observation mechanism is connected to the feed end of the material separation mechanism. The water outlet end of the material separation mechanism is connected to the water inlet end of the circulating water supply mechanism. The collection camera is installed in the hydraulic lifting observation mechanism. The circulating water supply mechanism, the material separation mechanism and the collection camera are all connected to the controller. The controller, the circulating water supply mechanism, the hydraulic lifting observation mechanism, the material separation mechanism and the collection camera are all powered by the energy storage power supply 2.

[0023] The frame is welded and plays a supporting role. It is used to install various mechanisms and improve the stability of the circulation system support. The controller is a PLC controller, which is used to control the circulating water supply mechanism, the hydraulic lifting observation mechanism, the material separation mechanism and the acquisition camera, so as to achieve mutual coordination. The circulating water supply mechanism is used to circulate the test water and mix the solid particles with the test water. The hydraulic lifting observation mechanism is used to lift the mixture of test water and solid particles to a certain height. The material separation mechanism is used to separate the solid particles from the test water and temporarily store the solid particles. The acquisition camera is a high-speed acquisition camera with an acquisition frequency of 500-1000Hz. Even if the solid particles are at a higher movement speed, the acquired images will not have obvious interweaving, afterimages, etc. The measurement area length is about 15cm. The energy storage power supply 2 provides power for the controller, the circulating water supply mechanism, the hydraulic lifting observation mechanism, the material separation mechanism and the acquisition camera; the energy storage power supply 2 gives priority to using rechargeable devices to ensure that the circulation system can continue to operate to a safe state and then stop in the event of a sudden power outage, thereby protecting the experimental system. The bottom support frame 1 is used to carry the energy storage power supply 2, the circulating water supply mechanism, the multifunctional support frame 11 and the vertical frame 7. The multifunctional support frame 11 is used to support the material separation mechanism. The vertical frame 7 is used to support the hydraulic lifting observation mechanism. The oblique reinforcement frame 28 is used to strengthen the strength of the vertical frame 7.

[0024] like Figure 2 As shown, the material separation mechanism includes a primary separation box 12, a first connecting pipe 20, a first electric valve 21, a second connecting pipe 23, a pressure-maintaining bin 22, a second electric valve 24 and a solid material temporary storage bin 25. The primary separation box 12, the pressure-maintaining bin 22 and the solid material temporary storage bin 25 are sequentially installed on the multifunctional support frame 11 from top to bottom. The feed end of the primary separation box 12 is connected to the liquid delivery pipe 10 of the hydraulic lifting observation mechanism, and the liquid outlet end of the primary separation box 12 is connected to the liquid inlet end of the water collecting tank 18 of the circulating water supply mechanism. The discharge end of the primary separation box 12 is connected to the feed end of the pressure-maintaining bin 22 through the first connecting pipe 20. The first electric valve 21 is installed on the first connecting pipe 20, and the first electric valve 21 is controlled by the controller and provided with power by the energy storage power supply 2. The discharge end of the pressure-maintaining bin 22 is connected to the feed end of the solid material temporary storage bin 25 through the second connecting pipe 23. The second electric valve 24 is installed on the second connecting pipe 23. The second electric valve 24 is controlled by the controller and is powered by the energy storage power supply 2. The discharge end of the solid material temporary storage bin 25 is connected to the mixing liquid pipe 6 of the circulating water supply mechanism.

[0025] The primary separation box 12 is used to separate solid particles from test water, and its inner bottom wall is inclined to facilitate the diversion of test water so that the test water can enter the interior of the water collecting box 18 more thoroughly. The first connecting pipe 20 is used to connect the primary separation box 12 with the pressure-holding bin 22. The first electric valve 21 is used to control the passage or closed circuit between the primary separation box 12 and the pressure-holding bin 22. The second connecting pipe 23 is used to connect the pressure-holding bin 22 with the solid material temporary storage bin 25. The pressure-holding bin 22 allows the solid particles inside to continue to fall, so that when conveying solid particles, the internal pressure of the material separation mechanism remains stable and unchanged to avoid back suction. In addition, it can also ensure uniform flow rate when conveying solid particles. The second electric valve 24 is used to control the passage or closed circuit between the pressure-holding bin 22 and the solid material temporary storage bin 25. The solid material temporary storage bin 25 is used to temporarily store solid particles.

[0026] Solid particles and test water can be separated inside the primary separation box 12. Under the joint action of the first connecting pipe 20, the first electric valve 21, the pressure maintaining bin 22, the second connecting pipe 23 and the second electric valve 24, the pressure during the transportation of solid particles can be guaranteed to avoid water being sucked back into the primary separation box 12. Under the joint action of the solid material temporary storage bin 25, the feed pipe 26 and the screw conveyor 27, the solid particles can be orderly delivered to the interior of the mixing pipe 6. The coordination of each level facilitates multiple tests, so that the distribution of solid particles under different liquid flow rates can be better judged.

[0027] like Figure 2As shown, the primary separation box 12 includes a liquid inlet pipe 13, a liquid passage pipe 17, a side observation window 16, a filter screen 15, a separation box body and a solid material diversion hopper 19. The separation box body is installed on the upper part of the multifunctional support frame 11 of the frame. A solid feed port 14 is provided on the top of the separation box body. The liquid delivery pipe 10 of the hydraulic lifting observation mechanism is connected to the upper end of the liquid inlet pipe 13. The lower end of the liquid inlet pipe 13 is connected to the top of the separation box body and is located on one side of the solid feed port 14. The filter screen 15 is installed obliquely in the inner cavity of the separation box body, the upper end of the filter screen 15 is located below the liquid inlet pipe 13 and the solid feed port 14, and the lower end of the filter screen 15 is connected to the solid material diversion hopper 19. The solid material diversion hopper 19 is installed in the middle right part of the separation box body. The solid material diversion hopper 19 is connected to the first connecting pipe 20. The upper end of the liquid pipe 17 is connected to the bottom of the separation box, and the lower end of the liquid pipe 17 is connected to the water collecting box 18 of the circulating water supply mechanism. The side observation window 16 is on the right side of the separation box and is located at the connection between the filter screen plate 15 and the solid material guide bucket 19.

[0028] The diameter of the liquid inlet pipe 13 is 600 mm to ensure the accuracy of the flow rate measurement, and is used to receive a solid-liquid mixture (composed of test water and solid particles). The liquid pipe 17 is used to introduce the test water of the separation box into the water collecting box 18. The solid feed port 14 is used to put solid particles into the separation box. The side observation window 16 is used to observe the real-time internal situation to ensure that abnormalities inside the separation box can be discovered in time. The filter screen 15 can separate the solid particles from the test water, so that the solid particles move to the right to the inside of the solid material diversion hopper 19, and the test water flows vertically downward. The separation box is used to accommodate test water and solid particles, and is equipped with a filter screen 15 and a solid material diversion hopper 19. The solid material diversion hopper 19 is used to concentrate the solid particles into the first connecting pipe 20.

[0029] like Figure 2 As shown, the bottom of the inner cavity of the pressure-keeping bin 22 is funnel-shaped, ensuring that the solid particles are smoothly introduced into the second connecting pipe 23. The top of the pressure-keeping bin 22 is connected to the first connecting pipe 20, and a first upper observation window 29 is provided on the top of the pressure-keeping bin 22, and the first upper observation window 29 is located on the side of the connection between the first connecting pipe 20 and the pressure-keeping bin 22. The first upper observation window 29 is used to observe the real-time internal situation to ensure that the abnormality inside the pressure-keeping bin 22 can be discovered in time.

[0030] like Figure 2As shown, the solid material temporary storage bin 25 includes a bin body, a second upper observation window 30, a screw conveyor 27 and a feed pipe 26. The bin body is installed at the lower part of the multifunctional support frame 11 of the frame. The top of the bin body is connected to the second connecting pipe 23. The feed pipe 26 is connected to the bottom of the bin body. The screw conveyor 27 is installed in the feed pipe 26, and the screw conveyor 27 is controlled by the controller and provided with power by the energy storage power supply 2. The second upper observation window 30 is installed at the top of the bin body and is located on one side of the second connecting pipe 23.

[0031] The bin is used for temporary storage of solid particles. The second upper observation window 30 is used to observe the real-time internal situation to ensure that abnormalities in the solid material temporary storage bin 25 can be discovered in time. The screw conveyor 27 is equipped with a variable frequency motor and a frequency converter to adjust the solid particle feeding speed, which can control the feeding speed of the solid particles and ensure the controllability of the test data. The diameter of the feed pipe 26 is 600mm to ensure the accuracy of the flow rate measurement.

[0032] like Figure 1 As shown, the circulating water supply mechanism includes a centrifugal pump 3, a liquid extraction pipe 4, a water collecting tank 18, a liquid delivery pipe 5 and a liquid mixing pipe 6. The centrifugal pump 3 and the water collecting tank 18 are both installed on the bottom support frame 1 of the frame. The liquid inlet end of the water collecting tank 18 is connected to the liquid outlet end of the primary separation box 12 of the material separation mechanism. The liquid outlet end of the water collecting tank 18 is connected to the liquid inlet end of the centrifugal pump 3 through the liquid extraction pipe 4. The liquid outlet end of the centrifugal pump 3 is connected to the liquid inlet end of the liquid mixing pipe 6 through the liquid delivery pipe 5. The feed end of the liquid mixing pipe 6 is connected to the discharge end of the solid material temporary storage bin 25 of the material separation mechanism, and the discharge end of the liquid mixing pipe 6 is connected to the feed end of the vertical lifting pipe 8 of the hydraulic lifting observation mechanism. The centrifugal pump 3 is controlled by the controller and is provided with electrical energy by the energy storage power supply 2.

[0033] The flow rate of centrifugal pump 3 should be set to 120mm 3 / h, and the head is 20m, providing power for the flow of test water. The liquid extraction pipe 4 is used to connect the water collecting tank 18 and the centrifugal pump 3, and is used to transport the test water. The water collecting tank 18 is used to collect the test water and prepare for the next test. The capacity of the water collecting tank 18 should be guaranteed to be at least 10t. The liquid delivery pipe 5 is used to transfer the test water flowing out of the centrifugal pump 3 to the mixing pipe 6. The mixing pipe 6 is used to fully mix the test water with the solid particles.

[0034] like Figure 1As shown, the hydraulic lifting observation mechanism includes a vertical lifting pipe 8, a bent hanging pipe 9 and a liquid conveying pipe 10. The feed end of the vertical lifting pipe 8 is connected to the discharge end of the mixing pipe 6 of the circulating water supply mechanism. The feed end of the bent hanging pipe 9 is connected to the discharge end of the vertical lifting pipe 8. The bent hanging pipe 9 is installed on the vertical frame 7 of the frame. The discharge end of the bent hanging pipe 9 is connected to the feed end of the liquid conveying pipe 10, and the discharge end of the liquid conveying pipe 10 is connected to the feed end of the primary separation box 12 of the material separation mechanism. The collection camera is installed in the inner cavity of the vertical lifting pipe 8, and the collection camera is controlled by the controller and provided with power by the energy storage power supply 2.

[0035] The height of the vertical lifting pipe 8 is 10m, and it is used to lift the test water and solid particles to a certain height; the bent hanging pipe 9 is used to be suspended on the vertical frame 7 and bear the dead weight of the liquid delivery pipe 10 and the vertical lifting pipe 8. The liquid delivery pipe 10 is used to introduce the solid-liquid mixture of the test water and solid particles into the primary separation box 12 of the material separation mechanism.

[0036] The working process of the deep-sea mining liquid-solid lifting circulation experimental system is described as follows: the centrifugal pump 3 extracts the test water, and the test water flows through the liquid delivery pipe 5 and is delivered to the mixing liquid pipe 6. At the same time, the solid material temporary storage bin 25 is fed into the mixing liquid pipe 6 through the feed pipe 26 under the action of the screw conveyor 27. In the mixing liquid pipe 6, the solid particles are mixed with the test water to form a solid-liquid mixture. When the solid-liquid mixture flows through the vertical lifting pipe 8, the high-speed acquisition camera collects the image of the solid-liquid mixture, and the vertical lifting pipe 8 raises the lifting height to a certain height. The solid-liquid mixture is then successively input into the primary separation box 12 through the bent hanging pipe 9 and the liquid delivery pipe 10. The solid-liquid mixture separates the solid particles and the test water through the filter screen 15, and the test water enters the water collection box 18 through the liquid passing pipe 17, and the solid particles roll along the filter screen 15 to the solid material guide bucket 19. The water collection box 18 enters the centrifugal pump 3 again through the liquid extraction pipe 4 and is reused to avoid the waste of water resources. The solid particles enter the pressure-maintaining bin 22 through the first connecting pipe 20, which can further prevent the solid particles from being sucked back due to the pressure difference, resulting in inconsistent numbers of solid particles. The solid particles flow into the solid material temporary storage bin 25 through the second connecting pipe 23 to be used in the next test.

[0037] The experimental system of this embodiment can ensure the controllability of other factors in the hydraulic lifting test. By using a material separation mechanism, the solid-liquid mixture can be separated, so that the number of solid particles is fixed in each test. By arranging a pressure holding bin 22 in the middle of the material separation mechanism, it can further avoid the solid particles from being sucked back due to the pressure difference, resulting in an inconsistent number of solid particles. By using a circulating water supply mechanism, it can ensure that the amount of water used each time is the same, further improving the reliability of the test data.

[0038] The above specific implementation modes are preferred embodiments of the present invention and cannot be used to limit the present invention. Any other changes or other equivalent replacement methods that do not deviate from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. Deep-sea mining liquid-solid lifting circulation experimental system, characterized by: It includes a frame, a controller, a circulating water supply mechanism, a hydraulic lifting observation mechanism, a material separation mechanism and a collection camera, wherein the circulating water supply mechanism, the hydraulic lifting observation mechanism and the material separation mechanism are all installed on the frame, the discharge end of the circulating water supply mechanism is connected to the feed end of the hydraulic lifting observation mechanism, the feed end of the circulating water supply mechanism is connected to the discharge end of the material separation mechanism, the discharge end of the hydraulic lifting observation mechanism is connected to the feed end of the material separation mechanism, the liquid outlet end of the material separation mechanism is connected to the liquid inlet end of the circulating water supply mechanism, the collection camera is installed on the hydraulic lifting observation mechanism, and the circulating water supply mechanism, the material separation mechanism and the collection camera are all connected to the controller.

2. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 1 is characterized by: The material separation mechanism includes a primary separation box, a first connecting pipe, a first electric valve, a second connecting pipe, a pressure-holding bin, a second electric valve and a solid material temporary storage bin. The primary separation box, the pressure-holding bin and the solid material temporary storage bin are all installed on the frame. The feed end of the primary separation box is connected to the discharge end of the hydraulic lifting and observation mechanism, the liquid outlet end of the primary separation box is connected to the liquid inlet end of the circulating water supply mechanism, the discharge end of the primary separation box is connected to the feed end of the pressure-holding bin through the first connecting pipe, the first electric valve is installed on the first connecting pipe, the discharge end of the pressure-holding bin is connected to the feed end of the solid material temporary storage bin through the second connecting pipe, the second electric valve is installed on the second connecting pipe, the discharge end of the solid material temporary storage bin is connected to the feed end of the circulating water supply mechanism, and the first electric valve, the second electric valve and the solid material temporary storage bin are all connected to the controller.

3. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 2 is characterized by: The primary separation box includes a liquid inlet pipe, a liquid flow pipe, a filter screen, a separation box body and a solid material diversion hopper. The separation box body is installed on the frame. A solid feed port is provided on the top of the separation box body. The upper end of the liquid inlet pipe is connected to the hydraulic lifting observation mechanism, and the lower end of the liquid inlet pipe is connected to the top of the separation box body. The filter screen is obliquely installed in the inner cavity of the separation box body. The upper end of the filter screen is located below the liquid inlet pipe and the solid feed port, and the lower end of the filter screen is connected to the solid material diversion hopper. The solid material diversion hopper is installed in the middle of the separation box body, and the solid material diversion hopper is connected to the first connecting pipe. The liquid inlet end of the circulating water supply mechanism is connected to the bottom of the separation box body through the liquid flow pipe.

4. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 3 is characterized by: The primary separation box also includes a side observation window, which is installed on the separation box body and corresponds to the connection between the filter screen plate and the solid material guide hopper.

5. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 2 is characterized by: The solid material temporary storage bin includes a bin body, a screw conveyor and a feed pipe. The bin body is installed on the frame, the top of the bin body is connected to the second connecting pipe, the feed end of the circulating water supply mechanism is connected to the bottom of the bin body through the feed pipe, the screw conveyor is installed on the feed pipe, and the screw conveyor is connected to the controller.

6. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 5 is characterized by: The solid material temporary storage bin further includes a second observation window, and the second upper observation window is installed on the top of the bin body.

7. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 2 is characterized by: A first upper observation window is provided on the top of the pressure-maintaining bin, and the bottom of the pressure-maintaining bin is funnel-shaped.

8. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 1 is characterized by: The circulating water supply mechanism includes a centrifugal pump, a liquid suction pipe, a water collecting tank, a liquid delivery pipe and a mixing liquid pipe. The centrifugal pump and the water collecting tank are both installed on the frame. The liquid inlet end of the water collecting tank is connected to the liquid outlet end of the material separation mechanism, the liquid outlet end of the water collecting tank is connected to the liquid inlet end of the centrifugal pump through the liquid suction pipe, the liquid outlet end of the centrifugal pump is connected to the liquid inlet end of the mixing liquid pipe through the liquid delivery pipe, the feeding end of the mixing liquid pipe is connected to the discharging end of the material separation mechanism, the discharging end of the mixing liquid pipe is connected to the feeding end of the hydraulic lifting and observation mechanism, and the centrifugal pump is connected to the controller.

9. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 1 is characterized by: The hydraulic lifting observation mechanism includes a vertical lifting pipe, a bent hanging pipe and a liquid conveying pipe. The lower end of the vertical lifting pipe is connected to the feed end of the circulating water supply mechanism. The bent hanging pipe is installed on the frame. The upper end of the vertical lifting pipe is connected to the liquid conveying pipe through the bent hanging pipe. The liquid conveying pipe is connected to the feed end of the material separation mechanism. The acquisition camera is installed on the vertical lifting pipe.

10. The deep-sea mining liquid-solid lifting circulation experimental system according to claim 1, characterized in that: The frame includes a bottom support frame, a multifunctional support frame, a vertical frame and an oblique reinforcement frame. The lower end of the multifunctional support frame and the lower end of the vertical frame are both connected to the bottom support frame, and the upper end of the vertical frame is connected to the bottom support frame through the oblique reinforcement frame. The hydraulic lifting and observation mechanism is installed on the vertical frame, the material separation mechanism is installed on the multifunctional support frame, and the circulating water supply mechanism is installed on the bottom support frame.

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