A deep sea mining conveyor system

Abstract

The application discloses a deep-sea mining conveying system, which comprises a conveying pump arranged on a seabed mining vehicle, a mining lifting hose with one end connected to an output port of the conveying pump, a deep-sea centrifugal pump with an input port connected to the other end of the mining lifting hose, a mining lifting hard pipe with one end connected to an output port of the deep-sea centrifugal pump, and a suspension assembly arranged on the mining ship and close to an outlet end of the mining lifting hard pipe, which is used for reducing the stress of the mining lifting hard pipe caused by the rolling, pitching and heaving of the ship body. Compared with the prior art, the whole hydraulic pipeline ore lifting system is simple in structure, the hose and the hard pipe form an integrated pipeline conveying system, the parameters are unified, the movement is coordinated, the laying and recovery time is reduced, and the conveying efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean mining, in particular to a deep-sea mining conveying system. BACKGROUND

[0002] There are abundant solid mineral resources in the deep sea. They exist in the form of polymetallic nodules, deep-sea sulfides, and cobalt-rich crusts on the seabed. These resources contain more than ten kinds of metals such as manganese, nickel, cobalt, and copper, and their reserves are tens to hundreds of times those on land, which have bright commercial exploitation prospects. In recent years, with the rapid growth of the world's demand for metal resources and the continuous development of deep-sea mineral resource development technologies, countries and enterprises around the world have stepped up their layout of deep-sea mineral resource development. Exploring and exploiting mineral resources hidden in the seabed has become an important goal for countries around the world. Deep-sea mineral resources are located thousands of meters deep in the seabed. Due to the very complex seabed operating environment, high seabed pressure, and other special factors such as various current conditions, the development and utilization of deep-sea resources must rely on modern high-tech and equipment.

[0003] The ore hoisting system responsible for safely transporting seabed ore to the ore ship on the sea surface is one of the important links of deep-sea mining. From the existing deep-sea mining technology research results at home and abroad, the water pipe type ore hoisting system is usually adopted. The existing water pipe type ore hoisting system mainly adopts the structure form of "hose conveying pump + hose + intermediate bin + hard pipe + ore hoisting pump". The ore hoisting pump transports the ore collected by the mining car to the intermediate bin through the hose, the intermediate bin is provided with a bin and a feeder, and the ore hoisting pump is connected in series on the hard pipe as a power device to pump the ore slurry in the intermediate bin to the ore ship.

[0004] However, the existing water pipe type ore hoisting system still has the following shortcomings:

[0005] The water pipe type ore hoisting system composed of the ore ship, the intermediate bin, the ore hoisting pump, the hard pipe, the pipe hose and the mining car has a complex motion state. Since the intermediate bin is connected with the hard pipe and the hose at the same time, the hose is connected with the seabed mining car, and the hard pipe is connected with the ore ship, the intermediate bin will be subjected to the double effects of the towing of the sea surface ore ship and the walking of the seabed mining car, so that the motion of the intermediate bin is complex and difficult to control, and the motion of the sea surface ore ship, the intermediate bin and the seabed mining car is difficult to coordinate. Due to the existence of the intermediate bin, the hose conveying and the hard pipe conveying become two independent pipe conveying systems, and the two independent pipe systems have the problem of matching operation parameters, thereby reducing the reliability and conveying efficiency of the ore hoisting system.

[0006] Therefore, the prior art still needs to be improved and developed. SUMMARY

[0007] In view of the above deficiencies of the prior art, the present application aims to provide a deep-sea mining conveying system, which can save the intermediate bin structure, and compared with the prior art, makes the whole hydraulic pipeline ore lifting system simple in structure, forms an integral pipeline conveying system with the hose and the hard pipe, unifies parameters, and coordinates movements, while reducing the time for laying and recovering, and improving the conveying efficiency.

[0008] The technical scheme of the present application is as follows:

[0009] A deep-sea mining conveying system for conveying the ore slurry collected by a seabed mining vehicle to a mining ship on the sea surface, comprising:

[0010] A conveying pump arranged on the seabed mining vehicle;

[0011] A mining hose connected at one end to the output port of the conveying pump;

[0012] A deep-sea centrifugal pump with an input port connected to the other end of the mining hose;

[0013] A mining hard pipe connected at one end to the output port of the deep-sea centrifugal pump; and

[0014] A suspension assembly arranged on the mining ship, connected to the mining hard pipe, and close to the outlet end of the mining hard pipe, and used for reducing the force on the mining hard pipe caused by the rolling, pitching, and heaving movements of the ship body.

[0015] Further, the conveying pump comprises:

[0016] A submersible motor with an output shaft rotating and providing rotary power;

[0017] A volute fixedly connected to the submersible motor;

[0018] An impeller rotatingly arranged in the volute and fixedly connected to the output shaft of the submersible motor;

[0019] A screw rod extending along the axial direction of the impeller, with one end of the screw rod fixedly connected to the output shaft of the submersible motor; and

[0020] A rotating head fixedly connected to the other end of the screw rod.

[0021] Further, a plurality of deep-sea buoyancy modules are arranged on the mining hose, and the deep-sea buoyancy modules are arranged at intervals.

[0022] Further, the deep-sea centrifugal pump is provided with a plurality of deep-sea centrifugal pumps, the plurality of deep-sea centrifugal pumps are connected in series, the input ports of the plurality of deep-sea centrifugal pumps connected in series are connected with the ore lifting flexible pipe, and the output ports of the plurality of deep-sea centrifugal pumps connected in series are connected with the ore lifting hard pipe.

[0023] Further, the ore lifting hard pipe is connected with a shallow-sea centrifugal pump.

[0024] Further, the suspension assembly comprises a flexible joint and a tensioner.

[0025] The flexible joint is fixedly connected with the ore lifting hard pipe and the deck of the mining ship.

[0026] The tensioner is connected with the outer wall of the ore lifting hard pipe and is used for keeping the relative position of the ore lifting pipe and the mining ship unchanged.

[0027] Further, the outer wall of the ore lifting hard pipe is fixedly connected with a shallow-sea buoyancy module.

[0028] Further, the deep-sea mining conveying system further comprises a backwater pipe for pumping the waste water lifted to the mining ship back to the seabed, the backwater pipe is provided with two backwater pipes, and the two backwater pipes are fixedly bound with the ore lifting hard pipe.

[0029] Further, the shallow-sea buoyancy module comprises two half-cylindrical buoyancy blocks, and the two half-cylindrical buoyancy blocks wrap the outer wall of the backwater pipe and the ore lifting hard pipe and form a column.

[0030] Further, the deep-sea centrifugal pump is an axial flow guide vane type centrifugal pump.

[0031] The deep-sea mining conveying system provided by the present application directly feeds the material by the conveying pump of the mining vehicle, directly sends the material to the input port of the deep-sea centrifugal pump through the ore lifting flexible pipe, lifts the ore slurry to the mining ship through the ore lifting hard pipe, adopts the suspension assembly at the connection position of the ore lifting hard pipe and the mining ship, effectively avoids the defect that the ore lifting hard pipe is difficult to match with the pipe on the mining ship due to the stress caused by the movement of the mining vehicle and the mining ship, coordinates the movement of the mining ship, the intermediate pipe and the seabed mining vehicle, reduces the intermediate bin structure, directly connects the ore lifting flexible pipe and the ore lifting hard pipe through the deep-sea centrifugal pump to form an integrated pipe conveying system, unifies the operation parameters of the pipe conveying system, improves the reliability of the deep-sea mining conveying system, avoids the defect that the seabed mining vehicle, the intermediate bin and the seabed mining vehicle are difficult to move in coordination due to the complex stress in the prior art, and compared with the prior art, the whole hydraulic pipe type ore lifting system has a simple structure, reduces the time of laying and recovery, and improves the conveying efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1A schematic diagram showing the principle of application of an embodiment of a deep-sea mining transport system according to the invention;

[0033] Figure 2 A cross-sectional view of a transport pump in an embodiment of a deep-sea mining transport system according to the invention;

[0034] Figure 3 A schematic diagram showing the principle of a suspension assembly in an embodiment of a deep-sea mining transport system according to the invention;

[0035] Figure 4 A front view of a shallow-sea buoyancy module in an embodiment of a deep-sea mining transport system according to the invention;

[0036] Figure 5 A view of Figure 4 in the direction A;

[0037] Figure 6 A view of Figure 4 in the direction B.

[0038] Reference numerals in the figures: 100, mining vehicle; 200, mining vessel; 210, storage bin; 220, deck; 300, transport pump; 310, submersible motor; 320, volute; 330, impeller; 340, screw rod; 350, spin-up head; 360, round tube; 400, mining hose; 410, deep-sea buoyancy module; 500, deep-sea centrifugal pump; 510, first mining pump; 520, second mining pump; 530, shallow-sea centrifugal pump; 600, mining hard pipe; 700, suspension assembly; 710, flexible joint; 720, tensioner; 721, tensioning rope; 800, shallow-sea buoyancy module; 810, semi-cylindrical buoyancy block; 900, return pipe. DETAILED DESCRIPTION

[0039] The invention provides a deep-sea mining transport system. To make the objectives, technical solutions and effects of the invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to explain the invention and are not intended to limit the invention.

[0040] As Figure 1As shown, the present application provides a deep-sea mining conveying system for conveying the ore slurry collected by the seabed mining vehicle 100 to the mining ship 200 on the sea surface, wherein the deep-sea mining conveying system comprises a conveying pump 300, a ore slurry lifting hose 400, a deep-sea centrifugal pump 500, a ore slurry lifting hard pipe 600, and a suspension assembly 700. The seabed mining vehicle 100 mines on the seabed, the conveying pump 300 is arranged on the seabed mining vehicle 100, one end of the ore slurry lifting hose 400 is connected to the output port of the conveying pump 300, the input port of the deep-sea centrifugal pump 500 is connected to the other end of the ore slurry lifting hose 400, one end of the ore slurry lifting hard pipe 600 is connected to the output port of the deep-sea centrifugal pump 500, and the suspension assembly 700 is arranged on the mining ship 200 and connected to the ore slurry lifting hard pipe 600 and close to the outlet end of the ore slurry lifting hard pipe 600, and the suspension assembly 700 is used for reducing the stress of the ore slurry lifting hard pipe 600 caused by the rolling, pitching and heaving of the ship body. The mining ship 200 is provided with a pipeline connected to the outlet end of the ore slurry lifting hard pipe 600 and receiving the ore slurry conveyed in the ore slurry lifting hard pipe 600 to the storage bin 210 on the mining ship 200. The conveying pump 300 sucks the ore slurry on the seabed mining vehicle 100, the ore slurry is conveyed by the ore slurry lifting hose 400, directly sent to the input port of the deep-sea centrifugal pump 500, and then the ore slurry is conveyed through the ore slurry lifting hard pipe 600 by the suction of the deep-sea centrifugal pump 500, so as to lift the ore slurry to the mining ship 200, and complete the conveying process of the ore slurry.

[0041] In the present scheme, the ore slurry is directly fed by the conveying pump 300 of the mining vehicle 100, directly sent to the input port of the deep-sea centrifugal pump 500 through the ore slurry lifting hose 400, and then lifted to the mining ship 200 through the ore slurry lifting hard pipe 600, and the suspension assembly 700 is arranged at the connection between the ore slurry lifting hard pipe 600 and the pipeline on the mining ship 200, which effectively avoids the difficulty in matching the ore slurry lifting hard pipe 600 with the pipeline on the mining ship 200 due to the stress caused by the movement of the mining vehicle 100 and the mining ship 200, and makes the movement of the mining ship 200, the intermediate pipeline and the seabed mining vehicle 100 consistent, reduces the structure of the intermediate bin, and directly connects the ore slurry lifting hose 400 and the ore slurry lifting hard pipe 600 through the deep-sea centrifugal pump 500 to form an integrated pipeline conveying system, so that the operation parameters of the pipeline conveying system are unified, the reliability of the deep-sea mining conveying system is improved, and the difficulty in movement coordination of the mining ship 200 on the sea surface, the intermediate bin and the seabed mining vehicle 100 due to the complex stress condition in the prior art is avoided. Compared with the prior art, the whole hydraulic pipeline type ore lifting system has a simple structure, reduces the time of laying and recovery, and improves the conveying efficiency.

[0042] In the specific structure of the present embodiment, the conveying pump 300 is arranged on the mining vehicle 100, like Figure 1 、 Figure 2As shown, the delivery pump 300 is a delivery pump 300 with a high-speed spiral flow inlet, which is used as a power device for pumping the ore slurry on the mining vehicle 100 into the ore lifting hose. The delivery pump 300 comprises a submersible motor 310, a volute 320, an impeller 330, a spiral rod 340, and a rotating head 350. The submersible motor 310 is powered to rotate the output shaft of the submersible motor 310 and provide high-speed rotating power. The volute 320 is fixedly connected to the submersible motor 310. The impeller 330 is rotatably arranged in the volute 320 and fixedly connected to the output shaft of the submersible motor 310. In this way, the impeller 330 and the volute 320 form a pump body. The spiral rod 340 extends along the axial direction of the impeller 330. One end of the spiral rod 340 is fixedly connected to the output shaft of the submersible motor 310. The rotating head 350 is fixedly connected to the other end of the spiral rod 340. Under the power of the submersible motor 310, the delivery pump 300 performs suction, and the ore slurry performs spiral upward movement along the spiral rod 340, so that the ore slurry can form a spiral flow with relatively concentrated energy, thereby continuously sucking and carrying the ore slurry. The delivery pump 300 with a high-speed spiral flow inlet has the characteristics of strong carrying capacity and high delivery concentration, and can efficiently deliver the ore slurry. Moreover, the volute 320 is fixedly connected to a circular pipe 360 arranged along the axial direction of the spiral rod 340. The circular pipe 360 is arranged outside the spiral rod 340. Due to the flow form of the rotating flow field of the delivery pump 300, the boundary conditions of the ore slurry in the circular pipe 360 can be effectively improved. When the angular velocity is small, the ore can be lifted and "spun" to prevent the accumulation of the ore slurry, and the purpose of high-concentration delivery of the ore lifting system can be achieved.

[0043] The delivery pump 300 with the spiral rod 340 and the rotating head 350 can make the ore slurry have the flow form of the rotating flow field during the operation of the delivery pump 300, which can lift and "spin" the ore to prevent the accumulation of the ore slurry. The structure of the spiral rod 340 and the rotating head 350 can form a spiral flow with relatively concentrated energy during the operation of the delivery pump 300. Compared with the straight-flow rotating delivery pump used in the conventional deep-sea mining hydraulic lifting system, the delivery pump 300 in the embodiment has the characteristics of fast rotating speed, strong carrying capacity, and high delivery concentration, and can efficiently deliver the ore slurry.

[0044] The output port of the delivery pump 300 is connected to the ore hoisting hose 400, and the lower end (input port) of the ore hoisting hose 400 is hingedly connected to the output port of the delivery pump 300. A plurality of deep-sea buoyancy modules 410 are fixedly connected to the outer wall of the ore hoisting hose 400, and the plurality of deep-sea buoyancy modules 410 are arranged at intervals. The interval arrangement of the deep-sea buoyancy modules 410 forms a distributed structure, so that the ore hoisting hose 400 forms an up-and-down curved wave structure in the sea, that is, the part of the ore hoisting hose 400 provided with the deep-sea buoyancy modules 410 serves as a wave crest, and the part of the ore hoisting hose 400 between adjacent two deep-sea buoyancy modules 410 forms a parabolic structure, and the trough of the parabola is at the low point. This arrangement can make the mining car 100 move freely in the maximum possible range, that is, when the mining car 100 moves, the ore hoisting hose 400 is stretched, so that the low point of the parabola formed by the ore hoisting hose 400 slowly moves upward, the distance between adjacent two wave crests is lengthened, thereby releasing the movement distance of the mining car 100 and improving the maximum movement range of the mining car 100. The ore hoisting hose 400 itself is not wound with the mining car 100 and the ore hoisting hard pipe 600, and the lower end (low point) of the ore hoisting hose 400 does not touch the bottom and is located as far as possible outside the propeller wake range of the mining car 100, thereby avoiding affecting the movement of the mining car 100 or affecting the movement of the mining car 100.

[0045] As shown in Figure 1 The upper end of the ore hoisting hose 400 is hingedly connected to the input port of the deep-sea centrifugal pump 500, and the hinge is a flexible connection. When the flexible hinge joint is connected between the equipment or the pipeline, it reduces the damage of the vibration generated during the operation of the equipment and the use of the pipeline to the pipeline interface. A plurality of deep-sea centrifugal pumps 500 are provided, and the plurality of deep-sea centrifugal pumps 500 are arranged in series. The input port of the plurality of deep-sea centrifugal pumps 500 connected in series is connected to the ore hoisting hose 400, and the output port of the plurality of deep-sea centrifugal pumps 500 connected in series is connected to the ore hoisting hard pipe 600.

[0046] The deep-sea centrifugal pump 500 used as the ore hoisting pump adopts an axial flow guide vane type centrifugal pump. In the present embodiment, two deep-sea centrifugal pumps 500 are provided, which are a first ore hoisting pump 510 and a second ore hoisting pump 520. The first ore hoisting pump 510 and the second ore hoisting pump 520 are arranged in series, the input port of the deep-sea centrifugal pump arranged in series is connected to the top of the ore hoisting hose 400, and the output port of the deep-sea centrifugal pump arranged in series is connected to the bottom of the ore hoisting hard pipe 600. The deep-sea centrifugal pump 500 is arranged in seawater 100 m away from the seabed.

[0047] A shallow-sea centrifugal pump 530 is connected to the lifting pipe 600 near the sea surface. Specifically, considering that cavitation does not occur at the inlet of the shallow-sea centrifugal pump 530, it is positioned on the lifting pipe 600 at a distance of 1100 meters from sea level. The shallow-sea centrifugal pump 530, as the lifting pump, is an axial-flow guide vane centrifugal pump. It is conceivable that, to increase the conveying capacity, multiple shallow-sea centrifugal pumps 530 can be used for relay transmission.

[0048] In this embodiment, two deep-sea centrifugal pumps 500 are used to increase the extraction of slurry from the lifting hose 400, generating a strong conveying force. This allows the slurry to be transported from the lifting hose 400 to the lifting rigid pipe 600. The slurry can then be transported from the deep sea at a depth of 5900-6000 meters to the shallow sea area via the lifting rigid pipe 600. The slurry is then further extracted by the shallow-sea centrifugal pump 530, realizing a relay transmission function in long pipeline transportation. This allows the slurry to be transported from the shallow sea at a depth of 1100 meters above sea level to the storage silo 210 on the mining vessel 200, completing the mining process.

[0049] The ore lifting rigid pipe 600 is connected to the fixed pipe (not shown in the diagram) on the mining vessel 200, such as... Figure 1 , Figure 3 As shown, a suspension assembly 700 is connected to the end of the hoisting rigid pipe 600 near the mining vessel 200. The suspension assembly 700 includes a flexible joint 710 and a tensioner 720. The flexible joint 710 is fixedly connected to the hoisting rigid pipe 600 and the deck of the mining vessel 200. The tensioner 720 is connected to the outer wall of the hoisting rigid pipe 600 and is used to keep the relative position of the hoisting pipe and the mining vessel 200 unchanged. The hoisting rigid pipe 600 is successfully connected to the mining vessel 200 through the assembly. After the top end of the hoisting rigid pipe 600 passes through the moon pool of the mining vessel 200, it is suspended at the position on the deck 220 of the mining vessel 200. At the suspension point, the flexible joint 710 and the tensioner 720 are used to connect the hoisting rigid pipe 600 and the pipeline on the mining vessel 200 to reduce the stress on the riser caused by the rolling, pitching, and heave motion of the hull.

[0050] Generally, the hull of the mining ship 200 will produce six degrees of freedom motion under the combined action of wind, wave, current and tide: three rotations: pitch, roll and yaw, three translations: surge, sway and heave (up and down motion). The yaw, surge and sway of the mining ship 200 belong to horizontal plane movement, which can be controlled by the dynamic positioning system. When the mining ship performs pitch, roll and heave, the pipe system will move up and down with the mining ship, which will cause longitudinal vibration of the riser. When vibrating, the hard pipe will have a large axial deformation and a large axial stress due to the weight of the lifting pipe system. The axial stress at the upper end of the pipe system is the largest, and the amplitude at the lower end is the largest. When the period of the sea wave is equal to the natural period of the pipe system, resonance occurs. The axial stress and axial deformation of the pipe system can easily cause fatigue damage to the pipe system, seriously affecting the stability, reliability and service life of the pipe system and the stability of the seabed mining vehicle, and thus directly affecting the efficiency and economy of the entire mining system. Without special devices, the pitch, roll and heave of the hull will inevitably affect the lifting pipe system in the sea.

[0051] Therefore, the suspension assembly 700 is used to connect the riser 600 and the mining ship 200. The riser 600 is synchronized with the mining ship 200 in three translation directions, and the flexible joint 710 allows a ± 15-degree rotation in the rotation direction, which reduces the bending moment at the top connection of the riser 600. The flexible joint 710 can withstand an axial tension of 1800 tons. In this way, when the mining ship 200 rotates slightly due to the action of the sea wave, the riser 600 and the pipe system in the sea are prevented from being pulled due to the twisting of the flexible joint 710. The tensioner 720 is usually fixedly connected to the outer wall of the riser 600 by a plurality of tensioning ropes 721 arranged symmetrically. The tensioning ropes 721 are fixedly connected to a tensioning force structure (not shown in the figure), which is fixed to the mining ship 200. The tensioning force structure tightens the tensioning ropes, thereby applying a certain tension to the pipe, which enables the riser 600 to move up and down synchronously with the mining ship 200, prevents the pipe from shaking and bending due to the action of the wave and tide, and thus reduces the impact of the heave of the mining ship 200 on the pipe system. Compared with the existing heave compensation system, the suspension assembly 700 can also reduce the impact of the pitch, roll and heave of the hull on the pipe system, so that the impact is within the allowable range of the mining system. Moreover, the suspension assembly 700 has a simple structure, a long service life and strong practicality.

[0052] The shallow sea buoyancy module 800 is fixedly connected to the outer wall of the riser 600. Through the buoyancy of the shallow sea buoyancy module 800 in the sea, the weight of the riser 600 in the water is reduced, thereby reducing the top tension of the outlet of the pipe system, especially the riser 600.

[0053] As shown in Figure 1 , Figure 4 , the deep-sea mining conveying system further comprises a backwater pipe 900 arranged for back-feeding the waste water lifted to the mining ship 200 to the seabed, the backwater pipe 900 is arranged in two, and the two backwater pipes 900 are fixedly bundled with the ore lifting hard pipe 600. One end of the backwater pipe is communicated with the storage bin 210 on the mining ship 200, and the other end extends into the seawater, and generally the other end of the backwater pipe 900 is output to the underwater 500 meters away from the sea surface, so that the waste water lifted to the water surface can be back-fed to the seabed through the backwater pipe, and the environment of the mining sea surface is protected.

[0054] As shown in Figure 5 , Figure 6 , the shallow sea buoyancy module 800 comprises two half-cylindrical buoyancy blocks 810, and the two half-cylindrical buoyancy blocks 810 wrap the outer walls of the backwater pipe 900 and the ore lifting hard pipe 600 and form a column. The ore lifting hard pipe 600 and the two backwater pipes 900 are bundled together, and the outside is wrapped with the shallow sea buoyancy module 800. A column is formed by wrapping the pipe system with the two half-cylindrical buoyancy blocks 810, and the buoyancy module is vertically arranged in the seawater. A groove (not shown in the figure) is formed on the outer wall of the buoyancy module, and the groove extends spirally along the outer wall of the buoyancy module, so that the effects of reducing vortex-induced vibration and water resistance are achieved.

[0055] In addition, the existing deep-sea hydraulic pipeline lifting system has the characteristics of long conveying distance, large conveying particle size, complex ore morphology, slow starting of conveying, etc. Generally, in order to ensure the safe operation of the whole system, dilute phase conveying is often used, which further limits the conveying efficiency and restricts the further development and commercialization process of deep-sea mining technology. The deep-sea mining conveying system of the present application has the advantages that: the deep-sea mining lifting system of the present application adopts hydraulic pipeline lifting, is provided with a backwater pipe 900, can back-feed the waste water lifted to the water surface to the seabed, and protects the environment of the mining sea surface; the suspension assembly 700 combining the tensioner 720 and the flexible joint 710 is used to connect the ore lifting hard pipe 600 and the mining ship 200, which reduces the influence of the pitch, roll and heave motion of the ship body on the pipe system, so that the influence reaches the allowable range of the ore lifting system. The conveying pump 300 with a high-speed spiral flow inlet is used to provide a spiral flow rotation mode for the hydraulic lifting system. The spiral flow has the characteristics of energy concentration, fast rotation speed, strong carrying capacity and high conveying concentration, can prevent ore slurry from accumulating, reduce energy consumption, and improve conveying efficiency. The ore slurry is directly conveyed to the inlet of the deep-sea centrifugal pump 500 by the conveying pump 300 with a high-speed spiral flow inlet, without the need for an intermediate bin. The whole lifting system has the advantages of simple structure, fast deployment and recovery speed, high safety performance, good adaptability, and strong practicality.

[0056] In summary, the deep-sea mining conveying system provided by the present application directly feeds the material by the conveying pump of the mining vehicle, directly sends to the input port of the deep-sea centrifugal pump through the ore lifting hose, lifts the ore slurry to the mining ship through the ore lifting hard pipe, and adopts the suspension assembly at the connection position of the ore lifting hard pipe and the mining ship, effectively avoids the difficulty in matching the ore lifting hard pipe with the pipeline on the mining ship due to the stress caused by the movement of the mining vehicle and the mining ship, makes the movement of the mining ship, the intermediate pipeline and the seabed mining vehicle consistent, reduces the intermediate bin structure, directly connects the ore lifting hose and the ore lifting hard pipe through the deep-sea centrifugal pump to form an integrated pipeline conveying system, unifies the operation parameters of the pipeline conveying system, improves the reliability of the deep-sea mining conveying system, avoids the difficulty in movement coordination of the surface mining ship, the intermediate bin and the seabed mining vehicle due to the complex stress in the prior art, compared with the prior art, simplifies the structure of the whole hydraulic pipeline type ore lifting system, reduces the time of laying and recovery, and improves the conveying efficiency.

[0057] It should be understood that the application of the present application is not limited to the above examples, and those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A deep sea mining transport system for transporting ore slurry collected by a seabed mining vehicle to a mining vessel on the sea surface, characterised in that, The utility model relates to a kind of deep sea mining system, comprising: a delivery pump disposed on a seabed mining vehicle; a mining hose connected at one end to an output of the delivery pump; a deep sea centrifugal pump having an input connected at the other end to the mining hose; a mining hard pipe connected at one end to an output of the deep sea centrifugal pump; and a suspension assembly disposed on the mining vessel and connected to the mining hard pipe proximate an outlet end of the mining hard pipe, the suspension assembly configured to reduce forces on the mining hard pipe due to roll, pitch and heave motions of the vessel; the suspension assembly comprising a flexible joint and a tensioner; the flexible joint fixedly connecting the mining hard pipe to a deck of the mining vessel; the tensioner connected to an outer wall of the mining hard pipe and configured to maintain a relative position of the mining hard pipe to the mining vessel; the mining hard pipe connected to the mining vessel in three translational directions and in rotational directions with a ±15 degree rotation of the flexible joint to reduce bending moments at a top connection of the mining hard pipe, the flexible joint capable of withstanding an axial tension of 1800 tons; thus, when the mining vessel rotates in a small range due to sea waves, the mining hard pipe and the pipeline system in the sea are prevented from being pulled due to the twisting of the flexible joint; the tensioner fixedly connected to the outer wall of the mining hard pipe by a plurality of tensioning ropes arranged symmetrically, the tensioning ropes fixedly connected to a tensioning force structure on the mining vessel, the tensioning force structure causing the tensioning ropes to be taut to apply a certain tension to the pipeline, so that the mining hard pipe can move up and down synchronously with the mining vessel to prevent the pipeline from shaking and bending due to waves and tides; a plurality of shallow water buoyancy modules fixedly connected to the outer wall of the mining hard pipe, the shallow water buoyancy modules arranged vertically in the sea, the outer wall of the shallow water buoyancy modules having grooves spirally extending thereon to reduce vortex-induced vibration and water resistance; the shallow water buoyancy modules reducing the weight of the mining hard pipe in the water to reduce the top tension of the outlet of the mining hard pipe; the delivery pump comprising: a submersible motor having an output shaft rotating to provide rotational power; a volute fixedly connected to the submersible motor; an impeller rotatingly disposed in the volute and fixedly connected to the output shaft of the submersible motor; a screw rod extending along an axial direction of the impeller, one end of the screw rod fixedly connected to the output shaft of the submersible motor; and a rotating head fixedly connected to the other end of the screw rod; the structure of the screw rod and the rotating head enables the delivery pump to form a concentrated spiral flow during operation, which can prevent the accumulation of ore slurry when the rotational angular velocity is small. a plurality of deep sea buoyancy modules are arranged on the mining hose.

2. A deep sea mining conveyance system according to claim 1, characterised in that, ​ 3. The deep sea mining conveyance system of claim 1, wherein, The deep-sea centrifugal pump is provided in plurality, the plurality of deep-sea centrifugal pumps are connected in series, the input port of the plurality of deep-sea centrifugal pumps connected in series is connected with a soft pipe for raising ore, and the output port of the plurality of deep-sea centrifugal pumps connected in series is connected with a hard pipe for raising ore.

4. A deep sea mining conveyance system according to claim 3, wherein, The hard pipe for raising ore is connected with a shallow-sea centrifugal pump.

5. The deep sea mining conveyance system of claim 1, wherein, The deep-sea mining conveying system further comprises a backwater pipe for pumping the waste water raised to the mining ship back to the seabed, the backwater pipe is provided in two, and the two backwater pipes are fixedly bound with the hard pipe for raising ore.

6. A deep sea mining conveyance system according to claim 5, wherein, The shallow-sea buoyancy module comprises two half-cylindrical buoyancy blocks, and the two half-cylindrical buoyancy blocks wrap the outer walls of the backwater pipe and the hard pipe for raising ore and form a column.

7. A deep sea mining conveyor system as claimed in any one of claims 1 to 6, wherein, The deep-sea centrifugal pump is an axial-flow guide vane type centrifugal pump.

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