Deepwater solid material lifting experiment system

Abstract

The invention discloses a deepwater solid material lifting experiment system. A material distributing mechanism comprises a clear water bin, a circulating bin, a material distributing bin and a material guiding trolley; the calibration mechanism comprises a calibration box which is connected with an outlet of the distribution bin; the feeding mechanism comprises a storage bin and a spiral conveyor connected with an outlet of the storage bin, and an inlet of the storage bin is connected with the circulating bin and the calibration box; the lifting mechanism comprises a plurality of vertical lifting pipes, each vertical lifting pipe comprises a plurality of combined pipe sections, and each combined pipe section comprises a supporting section, a measuring section and an observing section; the power mechanism comprises a water pump and an air compressor, an inlet of the water pump is connected with the clean water bin, the storage bin and a water source, an outlet of the spiral conveyor and an outlet of the water pump are connected with an inlet of the vertical lifting pipe, an air-entrapping connector is arranged on the side face of the vertical lifting pipe, and an outlet of the air compressor is connected with the air-entrapping connector; an outlet of the vertical lifting pipe is located in the material guiding trolley. According to the invention, hydraulic, pneumatic and hybrid material lifting experiments can be carried out, and the gas-liquid-solid three-phase flow state can be better monitored through the combined pipe section.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater material lifting experiments, and in particular relates to a deep-water solid material lifting experimental system. Background Art

[0002] Deepwater solid material lifting technology is mainly used in engineering operations such as reservoir dredging and deep-sea mining. The water depth of large and medium-sized reservoirs is usually around 100 meters, and the deepest is over 200 meters, while the water depth of deep-sea mining reaches more than 1,000 meters, which places extremely high demands on deepwater solid material lifting technology. Vertical lifting through pipelines is considered to be the most feasible and promising method at present. In recent years, although some domestic and foreign teams have conducted research on deep-sea resource mining technology with vertical lifting of pipelines, the mining cost is still high, the process technology is not yet mature, and the on-site application is mainly experimental small-scale mining, which needs further in-depth research.

[0003] At present, most of the deepwater solid material lifting test systems at home and abroad can only carry out hydraulic lifting tests or extremely small-scale pneumatic lifting tests alone. They cannot simulate hybrid power lifting conditions, and the test scenarios are not comprehensive enough. The pipe diameters used are single and have few functions, the test capabilities are weak, and the test results are quite different from the actual engineering conditions. The technical achievements obtained through the existing test systems have low reference value and are difficult to directly apply to actual projects. It is difficult to monitor the three-phase gas-liquid-solid in the existing system pipelines, which is not conducive to comprehensive testing and in-depth research on solid material lifting technology. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problems, and aims to provide a deep-water solid material lifting experimental system.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A deepwater solid material lifting experimental system includes a material distribution mechanism, a calibration mechanism, a feeding mechanism, a lifting mechanism and a power mechanism, wherein:

[0007] The material distribution mechanism includes a clean water bin, a circulation bin and a material distribution bin arranged side by side in the clean water bin, and a material guide trolley for switching the flow direction between the circulation bin and the material distribution bin;

[0008] The calibration mechanism includes a calibration box, the inlet of which is connected to the bottom outlet of the sub-bin;

[0009] The feeding mechanism includes a storage bin and a screw conveyor connected to the outlet of the storage bin, and the inlet of the storage bin is respectively connected to the circulation bin and the calibration box;

[0010] The lifting mechanism includes a plurality of vertical lifting pipes of different diameters, each of which includes a plurality of combined pipe sections, and each of which includes a supporting section, a measuring section and an observation section which are sequentially arranged and connected;

[0011] The power mechanism includes a water pump and an air compressor. The water pump inlet is connected to the clean water bin, the storage bin and the water source. The outlet of the screw conveyor and the outlet of the water pump are detachably connected to the bottom inlet of one of the vertical lifting pipes. A number of gas filling interfaces are provided on the side of the vertical lifting pipe. The air compressor outlet is detachably connected to a gas filling interface. The top outlet of the vertical lifting pipe is located inside the material guide trolley.

[0012] Furthermore, the clear water bin is a square box structure, and the circulation bin and the distribution bin are both funnel-shaped structures; the material guiding trolley includes a trolley body, guide rails and a driving component, the trolley body is also funnel-shaped, and the bottom of the trolley body is movably connected to the top of the circulation bin and the distribution bin through the guide rails, and the driving component is used to drive the trolley body to move along the guide rails so that the bottom outlet of the trolley body is moved above the top entrance of the circulation bin or the distribution bin.

[0013] Furthermore, a mesh flow area is provided on the side wall of the circulation bin, and the mesh diameter of the mesh flow area is smaller than the diameter of the solid material particles.

[0014] Furthermore, a first clean water return pipe is connected to the bottom of the clean water bin; a second clean water return pipe is also connected to the side of the storage bin; the power mechanism includes a clean water main pipe connected to a water source, and the ends of the first clean water return pipe and the second clean water return pipe are connected to the clean water main pipe; a water pump is arranged on the clean water main pipe for pumping clean water to the vertical lifting pipe.

[0015] Furthermore, the vertical lifting pipe also includes a bottom inlet section and a top outlet section located at both ends; a jet feeding structure is connected between the outlet of the clean water main pipeline, the outlet of the screw conveyor and the bottom inlet section of the vertical lifting pipe, and the jet feeding structure includes a main feeding pipe and a down-feeding pipe connected above the main feeding pipe, the inlet of the main feeding pipe is connected to the outlet of the clean water main pipeline through a flange, and the outlet of the main feeding pipe is connected to the bottom inlet section of the vertical lifting pipe of a selected diameter through a flange; the upper end of the down-feeding pipe is inclined toward the inlet direction of the main feeding pipe, and is connected to the outlet of the screw conveyor through a flange; the lower end of the down-feeding pipe is connected to the main feeding pipe, and a down-feeding port is formed at the intersection with the main feeding pipe; a pressure nozzle is provided inside the main feeding pipe, and the pressure nozzle is an annular stepped structure connected to the inner pipe wall of the main feeding pipe, and is located next to the down-feeding port near the inlet of the main feeding pipe.

[0016] Preferably, the feed pipe and the main feed pipe form an angle greater than 60°; the feed port area is 1.5 to 2.5 times the axial cross-section of the main feed pipe; and the inner diameter of the pressurizing nozzle is 1 / 2 of the inner diameter of the main feed pipe.

[0017] Furthermore, in the combined pipe section, the supporting section is a steel pipe, and the pipe length accounts for 3 / 10 of the total length of the combined pipe section; the measuring section is an engineering plastic pipe, and the pipe length accounts for 1 / 10 of the total length of the combined pipe section; the observation section is a transparent plexiglass tube with a square outer side and a round inner side, and the pipe length accounts for 6 / 10 of the total length of the combined pipe section; the pipe diameters of each pipe section in the same vertical riser are consistent; each supporting section is provided with a pressure hole, and a pressure sensor is installed at the pressure hole; and a pipeline section concentration meter is installed on the measuring section.

[0018] Furthermore, the power mechanism also includes an air storage tank connected to the air compressor outlet, and a gas pipeline is connected between the air storage tank and the vertical lifting pipe, and the gas pipeline has an inverted U-shaped pipe section; the gas pipeline is also provided with a one-way valve, a gas mass flow meter and a pressure-stabilizing valve.

[0019] Furthermore, a weighing sensor is provided at the bottom of the calibration box, and a liquid level sensor is provided at the top.

[0020] Furthermore, a vacuum gauge is installed at the inlet of the water pump, a pressure sensor is installed at the outlet, and a shaft power meter is installed on the pump shaft.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The power mechanism of the deep-water solid material lifting experimental system of the present invention is equipped with a water pump and an air compressor at the same time, which can carry out hydraulic, pneumatic and water-air hybrid lifting experiments, has a wide range of applications, and can better simulate the solid material lifting conditions in actual projects.

[0023] 2. In the deepwater solid material lifting experimental system of the present invention, the combined pipe section composed of the support section, the measuring section and the observation section can better realize the observation and monitoring of the gas-liquid-solid three-phase flow state in the vertical lifting pipeline, and obtain more accurate and comprehensive experimental results, which provides a strong reference basis for the formulation and improvement of deepwater solid material lifting plans in actual projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the deepwater solid material lifting experimental system. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the deepwater solid material lifting experimental system. Figure 2 ;

[0026] Figure 3 It is a schematic diagram of the top structure of the deepwater solid material lifting experimental system;

[0027] Figure 4 It is a structural diagram of the lifting mechanism;

[0028] Figure 5It is a schematic diagram of the structure of the vertical riser;

[0029] Figure 6 is a cross-sectional view of the jet feeding structure;

[0030] Figure 7 It is a connection diagram of the power mechanism.

[0031] Figure Number:

[0032] 10- material distribution mechanism, 11- clean water bin, 12- circulation bin, 121- mesh flow area, 13- material distribution bin, 14- material guide trolley, 141- trolley body, 142- guide rail, 143- driving part, 144- connecting rod; 20- calibration mechanism, 21- calibration box; 30- feeding mechanism, 31- storage bin, 32- screw conveyor; 40- lifting mechanism, 41- vertical lifting pipe, 411- supporting section, 412- measuring section, 413- observation section, 414- bottom inlet section, 415- top outlet section ; 50-power mechanism, 51-water pump, 52-air compressor, 53-clean water main pipeline, 54-gas pipeline, 541-check valve, 542-gas mass flow meter, 543-pressure-stabilizing valve, 544-inverted U-shaped pipe section, 55-gas storage tank; 61-first clean water return pipeline, 62-first return pipeline, 63-second return pipeline, 64-second clean water return pipeline; 70-jet feeding structure, 71-main feeding pipe, 711-pressurization nozzle, 72-discharge pipe, 721-discharge port; 80-support structure. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and the accompanying drawings specifically illustrate the deep-water solid material lifting experimental system of the present invention.

[0034] Example 1

[0035] like Figure 1 , 2As shown, the present embodiment provides a deepwater solid material lifting experimental system, including a material distribution mechanism 10, a calibration mechanism 20, a feeding mechanism 30, a lifting mechanism 40 and a power mechanism 50, wherein: the material distribution mechanism 10 includes a clean water bin 11, a circulation bin 12 and a material distribution bin 13 arranged side by side in the clean water bin 11, and a material guide trolley 14 for switching the flow direction between the circulation bin 12 and the material distribution bin 13; the calibration mechanism 20 includes a calibration box 21, the inlet of the calibration box 21 is connected to the bottom outlet of the material distribution bin 13; the feeding mechanism 30 includes a storage bin 31 and a screw conveyor 32 connected to the outlet of the storage bin 31, and the inlet of the storage bin 31 is respectively connected to the circulation bin 12 and the calibration box 21; the lifting mechanism 40 includes a plurality of vertical lifting pipes 41 of different diameters, each vertical lifting pipe 41 includes a plurality of combined pipe sections, and each combined pipe section includes a support section 411, a measuring section 412 and an observation section 413 arranged in sequence and connected ( Figure 5 ); the power mechanism 50 includes a water pump 51 and an air compressor 52, the inlet of the water pump 51 is connected to the clean water bin 11, the storage bin 31 and the water source, the outlet of the screw conveyor 32 and the outlet of the water pump 51 are detachably connected to the bottom inlet of one of the vertical lifting pipes 41, the side wall of the vertical lifting pipe 41 is provided with a plurality of gas filling interfaces, and the outlet of the air compressor 52 is detachably connected to a selected gas filling interface; the top outlet of the vertical lifting pipe 41 is located inside the material guide trolley 14.

[0036] Specifically, Figure 3 , 4 As shown, the deepwater solid material lifting experimental system also includes a support structure 80, and the material distribution mechanism 10, the calibration mechanism 20 and the lifting mechanism 40 are all supported and fixed by the support structure 80. The clear water bin 11 of the material distribution mechanism 10 is a square box structure, and the circulation bin 12 and the material distribution bin 13 are both funnel-shaped structures. The material guide trolley 14 includes a trolley body 141, a guide rail 142 and a driving member 143. The trolley body 141 is also funnel-shaped. The bottom of the trolley body 141 is movably connected to the top of the circulation bin 12 and the material distribution bin 13 through the guide rail 142. The driving member 143 is used to drive the trolley body 141 to move along the guide rail 142, so that the bottom outlet of the trolley body 141 moves to above the top entrance of the circulation bin 12 or the material distribution bin 13, so as to realize the switching of the material flow direction. In this embodiment, the driving member 143 of the material guiding trolley 14 is a hydraulic push rod, which is arranged on the support structure 80. The end of the hydraulic push rod is connected to the trolley body 141 through a connecting rod 144, which can drive the trolley to move quickly.

[0037] Furthermore, the side wall of the circulation bin 12 is provided with a mesh flow area 121, and the mesh diameter of the mesh flow area 121 is smaller than the diameter of the solid material particles, so that clean water can flow between the circulation bin 12 and the clean water bin 11 to maintain stable pressure. A first clean water return pipe 61 is connected to the bottom of the clean water bin 11. A first return pipe 62 is connected between the circulation bin 12 and the storage bin 31, and a second return pipe 63 is connected between the calibration box 21 and the storage bin 31, so that the solid material particles can return to the feeding mechanism 30 through the pipe during the system circulation process, so as to achieve lossless circulation of the particles. A weighing sensor is provided at the bottom of the calibration box 21, and a liquid level sensor is provided at the top to detect the amount of material in the calibration box 21. The outlet of the storage bin 31 is connected to the screw conveyor 32 through a knife gate valve, and a second clean water return pipe 64 is also connected to the side of the storage bin 31.

[0038] Furthermore, if Figures 1 to 3 As shown, the power mechanism 50 includes a clean water main pipeline 53 connected to a water source, and the ends of the first clean water return pipeline 61 and the second clean water return pipeline 64 are connected to the clean water main pipeline 53, so that the clean water from the material distribution mechanism 10 and the feeding mechanism 30 can be collected in the clean water main pipeline 53 and continue to circulate. In this embodiment, the inlet end of the clean water main pipeline 53 is connected to a box culvert (not shown in the figure), and clean water is stored in the box culvert as a water source. The water pump 51 adopts a variable frequency water pump, which is arranged on the clean water main pipeline 53 and is used to pump clean water to the vertical lifting pipe 41. Solid materials are not circulated and transported by the water pump 51, and the system stability is stronger. A vacuum gauge is installed at the inlet of the water pump 51, and a pressure sensor is installed at the outlet of the water pump 51, which are used to monitor the vacuum degree of the inlet of the water pump 51 and the outlet pressure of the water pump 51 respectively. A shaft power meter is installed on the pump shaft of the water pump 51 to monitor the power of the water pump 51.

[0039] Furthermore, if Figure 4 , 5 As shown, the vertical riser 41 also includes a bottom inlet section 414 and a top outlet section 415 at both ends, and the end of the top outlet section 415 extends into the top opening of the trolley body 141, so that the mixed fluid in the vertical riser 41 can return to the material distribution mechanism 10 for continuous circulation. A flow meter is provided on the bottom inlet section 414 of the vertical riser 41 to monitor the liquid carrier speed; and vibration sensors are also provided on the bottom inlet section 414 and the top outlet section 415 to monitor the vibration of the pipeline.

[0040] Furthermore, if Figure 2 , 6As shown, a detachable jet feeding structure 70 is connected between the outlet of the clean water main pipeline 53, the outlet of the screw conveyor 32 and the bottom inlet section 414 of the selected vertical lifting pipe 41. In actual application, the system is equipped with a jet feeding structure 70 with the same number of vertical lifting pipes 41, and the specifications of the jet feeding structure 70 match the pipe diameter of the vertical lifting pipe 41 one by one. By replacing different jet feeding structures 70, the same water pump 51 and the clean water main pipeline 53 can be connected to vertical lifting pipes 41 of different pipe diameters, and the materials transported by the vertical lifting pipes 41 of different pipe diameters can be circulated through the same set of material distribution mechanism 10 and feeding mechanism 30, which can provide more diverse and comprehensive experimental conditions, and the system structure is simple and the equipment cost is lower. During installation, according to the pipe diameter of the vertical lifting pipe 41 required for the experiment, a jet feeding structure 70 matching it is selected and connected to the screw conveyor 32 and the clean water main pipeline 53. The screw conveyor can be customized to a suitable length according to the site space. When in use, the amount of solid material entering the vertical lifting pipe 41 per unit time can be controlled by adjusting the rotation speed of the screw conveyor 32.

[0041] The jet feeding structure 70 includes a main feeding pipe 71 and a feed pipe 72 connected to the main feeding pipe 71. The inlet of the main feeding pipe 71 is connected to the outlet of the clean water main pipeline 53 through a flange (not shown in the figure), and the outlet of the main feeding pipe 71 is correspondingly connected to the bottom inlet section 414 of the vertical lifting pipe 41 of the selected diameter through a flange. The upper end of the feed pipe 72 is inclined toward the inlet direction of the main feeding pipe 71, and the angle between the feed pipe 72 and the main feeding pipe 71 is greater than 60°. The upper end of the feed pipe 72 is connected to the outlet of the screw conveyor 32 through a flange. The lower end of the feed pipe 72 is connected to the main feeding pipe 71, and a feed port 721 is formed at the intersection with the main feeding pipe 71. The area of ​​the feed port 721 is 1.5 to 2.5 times the axial cross section of the main feeding pipe 71, which can meet the high-concentration feeding requirements. A pressurized nozzle 711 is provided inside the main feeding pipe 71. The pressurized nozzle 711 is an annular stepped structure connected to the inner tube wall of the main feeding pipe 71, and is located on the side of the discharge port 721 near the entrance of the main feeding pipe 71, so that the clean water pumped by the water pump 51 can form a jet after passing through the pressurized nozzle 711, and mix with the clean water and solid particles flowing out of the discharge port 721, and push the mixed fluid into the vertical lifting pipe 41. In this embodiment, the inner diameter of the pressurized nozzle 711 is preferably 1 / 2 of the inner diameter of the main feeding pipe 71, which can better take into account the system flow and feeding efficiency. The diameters of the main feeding pipe 71 and the discharge pipe 72 of the jet feeding structure 70 are designed in proportion to meet the use requirements of lifting experiments under different conditions, further expanding the scope of application of the experimental system.

[0042] Furthermore, if Figure 4 , 5As shown, in the combined pipe section, the support section 411, the measuring section 412 and the observation section 413 are connected in sequence from bottom to top. Among them, the support section 411 is a steel pipe, the length of which accounts for about 3 / 10 of the total length of the combined pipe section, and is fixed on the support structure 80 to support other pipe sections. Each support section 411 is provided with a pressure hole, and a pressure sensor is installed at the pressure hole to detect the pressure in the pipeline. The measuring section 412 is an engineering plastic pipe, the length of which accounts for about 1 / 10 of the total length of the combined pipe section, and is installed with a pipeline cross-section density meter based on electrical resistance tomography technology (i.e., ERT pipeline cross-section density meter), which is used to detect the transport concentration and concentration distribution of coarse ore particles in the pipeline. The observation section 413 is a transparent organic glass tube with a square outside and a round inside, and the length of the tube accounts for 6 / 10 (i.e., 3 / 5) of the total length of the combined pipe section, which is convenient for observing the flow state of multiphase flow in the pipeline. A high-speed camera is provided at a position corresponding to the observation section 413 on the support structure 80, which can capture the moving images of the coarse particles in the transparent pipe, and the moving trajectory and speed of the coarse particles can be further known through the images. In this embodiment, in order to facilitate the processing and assembly during equipment production and the measurement and calculation during experimental use, the length of each pipe section is proportionally taken to be an integer or a decimal. The length of the support section 411 is 1m, the length of the measuring section 412 is 0.4m, and the length of the observation section 413 is 2m. The pipe diameters of each pipe section in the same vertical riser 41 are consistent. Each vertical riser 41 includes 4 combined pipe sections connected in sequence. The support section 411, the measuring section 412 and the observation section 413 are arranged in a regular order, which can realize comprehensive monitoring of the multiphase flow motion state of the entire pipe section.

[0043] Furthermore, if Figure 7 As shown, the power mechanism 50 also includes an air storage tank 55 connected to the outlet of the air compressor 52, and a gas pipeline 54 is connected between the air storage tank 55 and the vertical riser 41. The vertical riser 41 is provided with a plurality of gas filling interfaces of different sizes and positions for selection, and experiments can be carried out under a variety of gas filling conditions. The end of the gas pipeline 54 is detachably connected to the selected gas filling interface. The gas pipeline 54 is also provided with a one-way valve 541, a gas mass flow meter 542 and a pressure regulating valve 543 in sequence, which can accurately control the amount of gas introduced into the vertical riser 41. In this embodiment, the gas pipeline 54 has an inverted U-shaped pipe section 544, and the gas mass flow meter 542 is located at the rear end of the inverted U-shaped pipe section 544. The one-way valve 541 and the inverted U-shaped pipe section 544 can prevent the water in the vertical riser from flowing back toward the air compressor 52, thereby avoiding affecting the operation of the air compressor 52.

[0044] When conducting a hydraulic lifting experiment of deep-water solid materials, first add a certain amount of solid material particles (ore) into the storage bin 31, add clean water into the system through the box culvert, and start the water pump 51 to circulate the clean water; then start the screw conveyor 32 of the feeding mechanism 30 to convey the solid material particles to the vertical lifting pipe 41; then calibrate the concentration of the solid material particles in the pipeline through the calibration mechanism 20, and start the test and collect data after reaching the required concentration for the experiment; finally, after the test is completed, turn off the screw conveyor 32, and turn off the water pump 51 after all the solid material particles are recovered to the storage bin 31.

[0045] During the test, clean water flows along the clean water main pipe 53 to the jet feeding structure 70 and enters the main feeding pipe 71 under the pumping of the water pump 51. The material particles in the storage bin 31 enter the discharge pipe 72 of the jet feeding structure 70 under the conveying of the screw conveyor 32. The clean water passes through the pressurized nozzle 711 in the main feeding pipe 71 to form a jet, and then mixes with the material particles flowing out from the discharge port 721 and rushes into the bottom inlet section 414 of the vertical lifting pipe 41. Under the action of the water pump 51, the particles rise along the vertical lifting pipe 41 with the water flow, and fall into the material guide trolley 14 from the top outlet section 415. The material guide trolley 14 guides the clean water and material particles into the circulation bin 12. Part of the clean water flows into the clean water bin 11 through the mesh on the wall of the circulation bin 12, and then returns to the clean water main pipe 53 through the first clean water return pipe 61 at the bottom of the clean water bin 11. The solid material particles in the circulation bin 12 are mixed with the clean water and return to the storage bin 31 through the first return pipe 62. Part of the clean water returns to the clean water main pipe 53 through the second clean water return pipe 64 on the side of the storage bin 31, and the cycle continues. When calibration is required, the material guide trolley 14 guides the clean water and material particles flowing out of the vertical lifting pipe 41 into the sub-bin 13, and then enters the calibration box 21 through the bottom of the sub-bin 13, and returns to the storage bin 31 from the second return pipe 63 at the bottom of the calibration box 21, and then the clean water and granular materials continue to circulate.

[0046] When conducting a pneumatic lifting experiment of deep-water solid materials, first add a certain amount of solid material particles (ore) into the storage bin 31, and add clean water to the system through the culvert; then start the air compressor 52 to add gas according to the specified gas volume or flow rate index; then start the screw conveyor 32 of the feeding mechanism 30 to convey the solid material particles to the vertical lifting pipe 41; then calibrate the concentration of the solid material particles in the pipeline through the calibration mechanism 20, and start testing and collect data after reaching the required concentration for the experiment; finally, after the test is completed, turn off the screw conveyor 32, and turn off the air compressor 52 after all the solid material particles are recovered to the storage bin 31.

[0047] During the test, the material particles in the storage bin 31 enter the discharge pipe 72 of the jet feeding structure 70 under the conveyance of the screw conveyor 32, enter the main feeding pipe 71 from the discharge port 721, and then flow into the bottom inlet section 414 of the vertical lifting pipe 41. The compressed gas generated by the air compressor 52 enters the vertical lifting pipe 41 from the gas tank 55 through the gas pipeline 54, mixes with the clean water and the material particles, and then the material particles also rise along the vertical lifting pipe 41 driven by the rising gas, and fall into the guide trolley 14 from the top outlet section 415. The guide trolley 14 guides the material particles into the circulation bin 12, and the material particles in the circulation bin 12 return to the storage bin 31 through the first return pipe 62, and the cycle continues. When calibration is required, the guide trolley 14 guides the material particles flowing out of the vertical lifting pipe 41 into the sub-bin 13, and then enters the calibration box 21 through the bottom of the sub-bin 13, and returns to the storage bin 31 from the second return pipe 63 at the bottom of the calibration box 21, and then continues to circulate.

[0048] When conducting a hybrid power lifting experiment for deep-water solid materials, first, a certain amount of solid material particles (ore) are added to the storage bin 31, and then clean water is added to the system through the box culvert. The water pump 51 and the air compressor 52 are started simultaneously or successively to add gas to the clean water according to the specified gas addition amount or flow rate index; then the screw conveyor 32 of the feeding mechanism 30 is started to convey the solid material particles to the vertical lifting pipe 41; the concentration of the solid material particles in the pipeline is calibrated by the calibration mechanism 20, and the test is started and data is collected after the concentration required for the experiment is reached; during the test, the material particles in the vertical lifting pipe 41 rise along the pipeline driven by the water flow and gas at the same time, and circulation in the system is achieved through hybrid power; finally, after the test is completed, the screw conveyor 32 is closed, and after all the solid material particles are recovered to the storage bin 31, the water pump 51 and the air compressor 52 are closed.

[0049] After the experiment is completed, further statistical calculation and analysis of key data collected by various instruments during the experiment, such as water pump inlet and outlet pressures, pump power, pipeline coarse particle delivery concentration and its concentration distribution, coarse particle movement trajectory and speed, carrier liquid flow rate, gas addition volume, pipeline vibration, etc., can provide a strong basis for the formulation and improvement of deepwater solid material lifting plans in actual projects.

[0050] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A deepwater solid material lifting experimental system, characterized in that: It includes material distribution mechanism, calibration mechanism, feeding mechanism, lifting mechanism and power mechanism, among which: The material distribution mechanism includes a clean water bin, a circulation bin and a material distribution bin arranged side by side in the clean water bin, and a material guide trolley for switching the flow direction between the circulation bin and the material distribution bin; The calibration mechanism comprises a calibration box, the inlet of which is connected to the outlet of the sub-bin; The feeding mechanism includes a storage bin and a screw conveyor connected to the outlet of the storage bin, and the inlet of the storage bin is respectively connected to the circulation bin and the calibration box; The lifting mechanism comprises a plurality of vertical lifting pipes of different diameters, each of which comprises a plurality of combined pipe sections, each of which comprises a supporting section, a measuring section and an observation section which are arranged and connected in sequence; The power mechanism includes a water pump and an air compressor. The water pump inlet is connected to the clean water tank, the storage tank and the water source. The outlet of the screw conveyor and the outlet of the water pump are detachably connected to the bottom inlet of one of the vertical lifting pipes. A plurality of gas filling interfaces are provided on the side of the vertical lifting pipe. The air compressor outlet is detachably connected to a gas filling interface. The top outlet of the vertical lifting pipe is located inside the material guiding trolley.

2. The deepwater solid material lifting experimental system according to claim 1 is characterized by: The clean water bin is a square box structure, and the circulation bin and the material distribution bin are both funnel-shaped structures; The material guiding trolley comprises a trolley body, guide rails and a driving component. The trolley body is also funnel-shaped. The bottom of the trolley body is movably connected to the top of the circulation bin and the distribution bin through the guide rails. The driving component is used to drive the trolley body to move along the guide rails so that the bottom outlet of the trolley body moves above the top entrance of the circulation bin or the distribution bin.

3. The deepwater solid material lifting experimental system according to claim 1 is characterized by: The side wall of the circulation bin is provided with a mesh flow area, and the mesh diameter of the mesh flow area is smaller than the diameter of the solid material particles.

4. The deepwater solid material lifting experimental system according to claim 1 is characterized by: A first clean water return pipe is connected to the bottom of the clean water tank; The side of the storage bin is also connected to a second clean water return pipe; The power mechanism comprises a clean water main pipeline connected to a water source, and the ends of a first clean water return pipeline and a second clean water return pipeline are connected to the clean water main pipeline; The water pump is arranged on the clean water main pipeline and is used for pumping clean water to the vertical lifting pipe.

5. The deepwater solid material lifting experimental system according to claim 4 is characterized by: The vertical riser also includes a bottom inlet section and a top outlet section located at both ends; A jet feeding structure is connected between the outlet of the clean water main pipeline, the outlet of the screw conveyor and the bottom inlet section of the vertical lifting pipe, the jet feeding structure includes a main feeding pipe and a down pipe connected above the main feeding pipe, the inlet of the main feeding pipe is connected to the outlet of the clean water main pipeline through a flange, and the outlet of the main feeding pipe is connected to the bottom inlet section of the vertical lifting pipe of a selected diameter through a flange; The upper end of the feed pipe is inclined toward the inlet of the main feeding pipe and is connected to the outlet of the screw conveyor through a flange; the lower end of the feed pipe is communicated with the main feeding pipe, and a feed port is formed at the intersection with the main feeding pipe; a pressurizing nozzle is arranged inside the main feeding pipe, and the pressurizing nozzle is an annular stepped structure connected to the inner tube wall of the main feeding pipe, and is located next to the feed port and close to the inlet of the main feeding pipe.

6. The deepwater solid material lifting experimental system according to claim 5 is characterized by: The feed pipe and the main feed pipe form an angle greater than 60°; The area of ​​the feed port is 1.5 to 2.5 times the axial cross section of the main feed pipe; The inner diameter of the pressurizing nozzle is 1 / 2 of the inner diameter of the main feeding pipe.

7. The deepwater solid material lifting experimental system according to claim 1 is characterized by: In the combined pipe section, the support section is a steel pipe, and the pipe length accounts for 3 / 10 of the total length of the combined pipe section; the measuring section is an engineering plastic pipe, and the pipe length accounts for 1 / 10 of the total length of the combined pipe section; the observation section is a transparent organic glass tube with a square outer surface and a round inner surface, and the pipe length accounts for 6 / 10 of the total length of the combined pipe section; The pipe diameters of each pipe section in the same vertical riser are consistent; A pressure hole is provided on each of the support sections, and a pressure sensor is installed at the pressure hole; a pipeline cross-section concentration meter is installed on the measuring section.

8. The deepwater solid material lifting experimental system according to claim 1 is characterized by: The power mechanism also includes an air storage tank connected to the outlet of the air compressor. A gas pipeline is connected between the gas storage tank and the vertical lifting pipe, and the gas pipeline has an inverted U-shaped pipe section; a one-way valve, a gas mass flow meter and a pressure-stabilizing valve are also provided on the gas pipeline.

9. The deepwater solid material lifting experimental system according to claim 1 is characterized by: A weighing sensor is arranged at the bottom of the calibration box, and a liquid level sensor is arranged at the top.

10. The deepwater solid material lifting experimental system according to claim 1, characterized in that: The inlet of the water pump is equipped with a vacuum gauge, the outlet is equipped with a pressure sensor, and the pump shaft is equipped with a shaft power meter.

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