Spiral collecting device and ore collecting system thereof

Abstract

The spiral collecting device comprises a mine car, a plurality of spiral collecting devices are sequentially arranged at the bottom of the mine car from top to bottom and distributed in multiple rows, and each spiral collecting device comprises a middle body, a front connecting body with a front groove chamber, a front spiral body with a collecting opening, a rear connecting body with a rear groove chamber and a rear spiral body with a waste discharging opening. A collecting pipe and a waste discharging pipe are arranged in the middle body to be connected with a mine car. According to the mine car, a parallel spiral drilling and walking mine collecting mode is adopted, the spiral collecting devices distributed in an array mode are arranged at the bottom of the mine car, the spiral collecting devices can guide sea mud into the front groove chambers from the collecting ports through rotary drilling of the front spiral bodies, and the mine car sucks the sea mud in the front groove chambers through the collecting pipes connected in parallel to treat the sea mud; waste soil is discharged into the rear groove chambers through the waste discharge pipes connected in parallel, and the spiral collection device extrudes the waste soil out of the waste discharge port through the rear screw rod to backfill the drilling channel, so that walking ore collection with mining and backfilling at the same time is achieved.

Description

Technical Field

[0001] This invention relates to the field of deep-sea mining technology, specifically to a spiral harvesting device and its ore collection system. Background Technology

[0002] Rare earth elements are widely found in seabed sediments, rocks, and hydrothermal sulfides, especially in the mud of deep-sea plains, which is rich in rare earth minerals. However, the high pressure, low temperature, and strong corrosiveness of the deep-sea environment pose significant challenges to mining technology.

[0003] Currently, deep-sea rare earth mining mainly employs a single-station negative pressure suction ore collection system. This system creates a well on the seabed using vertical drilling components, utilizes negative pressure to suction out marine mud or sand, and then extracts rare earth elements and discharges waste soil through separation equipment. After mining is completed, the waste soil must be backfilled into the well before moving to the next area for repeated operations. The drawback of this method is: Sequential operation is inefficient: Mining, backfilling, and transfer must be carried out step by step, making synchronous operation impossible and resulting in overall low efficiency. Significant environmental disturbance: Concentrated mining and backfilling easily cause large-scale disturbance of seabed sediments, forming plumes and impacting marine ecosystems. Poor adaptability: Single-station systems struggle to adapt to different depths of mineral deposits and cannot dynamically adjust the mining path.

[0004] To address the aforementioned issues, existing technologies have attempted multi-station parallel mining schemes, but these schemes still have the following shortcomings: Complex structure: Multi-station systems typically rely on independent drive units, resulting in large equipment size and high energy consumption.

[0005] Uneven backfilling: Uneven distribution of waste soil during backfilling can easily lead to seabed topographic collapse or local accumulation.

[0006] Insufficient flexibility: It lacks the ability to dynamically adjust and is difficult to cope with complex seabed topography or changes in mineral layers.

[0007] Therefore, there is an urgent need for a deep-sea mineral collection system that can simultaneously carry out mining, backfilling and transfer, and is also highly efficient, environmentally friendly and flexible. Summary of the Invention

[0008] The present invention aims to overcome at least one of the defects of the prior art and provide a spiral harvesting device to solve the technical problem that it is difficult to carry out mining, backfilling and transfer simultaneously in the prior art, thereby affecting the mining efficiency of deep-sea rare earth minerals.

[0009] Specifically, this invention protects a spiral collection device, comprising: an intermediate body, a front connecting body, a rear connecting body, a front spiral body, and a rear spiral body; the front and rear ends of the intermediate body are respectively movably connected to the front and rear connecting bodies; the interior of the intermediate body is provided with a dual-axis motor, a collection tube, and a waste discharge tube; the front spiral body is rotatably sleeved on the front connecting body, and the rear spiral body is rotatably sleeved on the rear connecting body; the two ends of the dual-axis motor are respectively connected to a front shaft and a rear screw via couplings, the front end of the front shaft passes through the front connecting body and is fixed to the inner wall of the front spiral body, and the rear end of the rear screw passes through the rear connecting body and is fixed to the inner wall of the rear spiral body, so as to realize the simultaneous operation of the dual-axis motor. The front and rear helical bodies are driven by a step-by-step mechanism; one end of the collection pipe extends into the front connecting body, one end of the waste discharge pipe extends into the rear connecting body, and the other ends of the collection pipe and waste discharge pipe extend out of the intermediate body; the dual-shaft motor drives the front and rear helical bodies to rotate through the front shaft and the rear screw respectively; the front helical body guides the marine mud into the front connecting body, and the mine car sucks in the marine mud in the front connecting body through the collection pipe, separating it into rare earth and waste soil, and sends the waste soil into the rear connecting body through the waste discharge pipe; the dual-shaft motor discharges the waste soil in the rear connecting body from the waste discharge port through the rear screw to backfill the mining channel.

[0010] Furthermore, the front end of the front connector has a front groove chamber, which is conical in shape, with its inner diameter gradually increasing and then decreasing along its axial direction from front to back, forming an annular groove near the bottom of the front groove chamber; multiple collection ports are provided through the front end face of the front spiral body, and the collection ports are connected to the front groove chamber; the rear end of the rear connector has a rear groove chamber, which includes a first chamber and a second chamber that are connected through each other, the inner diameter of the first chamber is constant along its axial direction from front to back, and the inner diameter of the second chamber gradually increases along its axial direction from front to back to form a cone shape; multiple waste discharge ports are provided through the rear end face of the rear spiral body, and the waste discharge ports are connected to the rear groove chamber; one end of the collection tube extends into the front groove chamber, and one end of the waste discharge tube extends into the rear groove chamber, with the end located in the front groove chamber facing the bottom of the annular groove. When the dual-shaft motor drives the front and rear helical bodies to rotate via the front shaft and the rear screw respectively, the collection port guides the marine mud into the front trough chamber. The mine car sucks in the marine mud in the front trough chamber through the collection pipe and separates it into rare earth and waste soil. The waste soil is then sent into the rear trough chamber through the waste discharge pipe. At the same time, the dual-shaft motor discharges the waste soil in the rear trough chamber from the waste discharge port through the rear screw to backfill the mining channel.

[0011] Preferably, the outer spirals of the front and rear spirals are Archimedean spirals, the front end of the front spiral is a cone, and multiple scrapers are distributed around the cone surface of the cone.

[0012] Furthermore, the front axle is provided with a helical blade, which is distributed at the front end of the front groove chamber; and the diameter of the helical blade gradually increases from front to back along its axial direction to be close to the inner wall of the front groove chamber.

[0013] Furthermore, the rear screw includes a straight screw and a variable diameter screw, the straight screw and the variable diameter screw are coaxially connected, and the straight screw is located in the first chamber of the rear groove chamber, while the variable diameter screw is located in the second chamber of the rear groove chamber.

[0014] Furthermore, the intermediate body also includes multiple telescopic components connecting the front and rear connecting bodies, distributed around the end faces of the front and rear connecting bodies. Each telescopic component includes a telescopic cylinder and ball heads located at both ends of the telescopic cylinder. Ball grooves are provided at the rear end of the front connecting body and the front end of the rear connecting body. The balls at both ends of the telescopic cylinder are rotatably mounted within the ball grooves at the rear end of the front connecting body and the front end of the rear connecting body, respectively. By independently extending and retracting the multiple telescopic cylinders to adjust their length, the angle of the front and rear connecting bodies is changed to adjust the direction of rotation.

[0015] Preferably, the spiral collection device of the present invention further includes a soft sealing body, wherein the intermediate body is movably connected to the front connecting body and the rear connecting body through the soft sealing body.

[0016] Preferably, the spiral collection device of the present invention further includes a spring member disposed on the outer wall of the intermediate body; the portions of the collection pipe and the waste discharge pipe located outside the intermediate body are disposed inside the spring member. The intermediate body is mounted on the mine car via the spring member, and two adjacent intermediate bodies are connected by the spring member.

[0017] The present invention also protects a ore collection system, including a mine car and a plurality of the above-described spiral collection devices, the spiral collection devices being disposed at the bottom of the mine car.

[0018] Furthermore, multiple spiral collection devices are arranged sequentially from top to bottom at the bottom of the mine car, and the multiple spiral collection devices are distributed in multiple rows; the outer ends of multiple collection pipes are connected in parallel, and the outer ends of the waste discharge pipes are installed in parallel inside the mine car to form a parallel structure.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention employs a parallel spiral drilling method for mobile ore collection. By setting up an array of spiral collection devices at the bottom of the mine car, the spiral collection devices can guide marine mud from the collection port into the front chamber through the rotating drilling of the front spiral body. The mine car sucks in the marine mud from each front chamber through parallel collection pipes, processes it, and then discharges the waste soil into each rear chamber through parallel waste discharge pipes. Meanwhile, the spiral collection devices use the rear screw to squeeze the waste soil out of the waste discharge port and backfill the drilling channel, thereby achieving mobile ore collection with simultaneous mining and backfilling. Attached Figure Description

[0020] Figure 1 A schematic diagram of the structure of the deep-sea rare earth-rich spiral parallel ore collection system provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the spiral collection device of the deep-sea rare earth-rich spiral parallel ore collection system provided in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the spiral blade structure of the deep-sea rare earth-rich spiral parallel ore collection system provided in an embodiment of the present invention.

[0023] Figure 4 A schematic diagram of the rear chamber of a deep-sea rare earth-rich spiral parallel ore-gathering system provided for an embodiment of the invention. The labels in the diagram represent the following: 1-Intermediate body; 2-Front connector; 3-Rear connector; 4-Front helical body; 5-Rear helical body; 6-Telescopic component; 11-Dual-shaft motor; 12-Front shaft; 13-Rear screw; 14-Collection tube; 15-Waste discharge tube; 16-Soft seal; 17-Spring component; 21-Front chamber; 31-Rear chamber; 41-Collection port; 42-Conical head; 51-Waste discharge port; 61-Telescopic cylinder; 62-Ball head; 121 - Spiral blade; 131 - Straight screw; 132 - Variable diameter screw; 211 - Annular groove; 421 - Scraper; 311 - First chamber; 312 - Second chamber. Detailed Implementation

[0024] The accompanying drawings illustrate the technical solutions of the embodiments of the present invention in more detail. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] Example

[0028] like Figure 1 , Figure 2 As shown, the present invention provides a spiral parallel ore collection system applicable to deep-sea rare earth-rich areas, including a mine car, with multiple spiral collection devices arranged sequentially from top to bottom on the bottom of the mine car, and the multiple spiral collection devices are distributed in multiple rows. The spiral collection device includes an intermediate body 1, with a front connecting body 2 and a rear connecting body 3 respectively provided at the front and rear ends of the intermediate body 1. A front spiral body 4 and a rear spiral body 5 are respectively rotatably sleeved on the front connecting body 2 and the rear connecting body 3. The front end of the front connector 2 forms a front groove chamber 21, and the front end face of the front spiral 4 is provided with multiple collection ports 41, which are connected to the front groove chamber 21. The rear end of the rear connector 3 forms a rear groove chamber 31, and the rear end face of the rear spiral 5 is provided with multiple waste discharge ports 51, which are connected to the rear groove chamber 31. The intermediate body 1 is equipped with a dual-axis motor 11. The two ends of the dual-axis motor 11 are connected to a front shaft 12 and a rear screw 13 respectively through a coupling. The front end of the front shaft 12 passes through the front connecting body 2 and is fixed on the inner wall of the front screw 4. The rear end of the rear screw 13 passes through the rear connecting body 3 and is fixed on the inner wall of the rear screw 5, so as to synchronously drive the front screw 4 and the rear screw 5. A collection pipe 14 and a waste discharge pipe 15 are respectively installed in the intermediate body 1. One end of the collection pipe 14 extends into the front trough 21, and one end of the waste discharge pipe 15 extends into the rear trough 31. The other ends of the collection pipe 14 and the waste discharge pipe 15 extend out of the intermediate body 1. After the outer ends of the collection pipes 14 and the outer ends of the waste discharge pipes 15 of the multiple spiral collection devices are connected in parallel, they are installed inside the mine car to form a parallel structure.

[0029] The parallel ore collection system of the present invention mainly consists of multiple arrays of spiral collection devices installed at the bottom of the mine car. The spiral collection device has an intermediate body 1 connected to the mine car. The two ends of the intermediate body 1 have a front connecting body 2 and a rear connecting body 3. Rotating front spiral body 4 and rear spiral body 5 are set outside the two, so that the spiral collection device can spiral forward. During the spiraling process, the collection port 41 at the end of the front spiral body 4 can guide the marine mud into the front chamber 21 of the front connecting body 2, so that it is sucked into the mine car by the collection pipe 14 and processed into rare earth and waste soil. The waste soil is discharged into the rear chamber 31 of the rear connecting body 3 through the waste discharge pipe 15, so that it is squeezed out from the waste discharge port 51 by the rear screw 13, so that the waste soil backfills the spiraling channel.

[0030] The front helix 4 and the rear helix 5 are driven by the front shaft 12 and the rear screw 13, respectively, while the front shaft 12 and the rear screw 13 are synchronously driven by the dual-axis motor 11.

[0031] Compared to existing ore collection systems, the parallel ore collection system of this invention adopts parallel spiral drilling for mobile ore collection. By setting a spiral collection device that can rotate at the bottom of the mine car, the front spiral 4 guides marine mud from the collection port 41 into its front chamber 21 during the rotation process, and is sucked into the mine car by the collection pipe 14 for processing. The mine car transports waste soil through the waste discharge pipe 15 to its rear chamber 31, where it is squeezed out from the waste discharge port 51 by the rear screw 13, thereby backfilling the spiral channel. This results in less plume, reducing the environmental impact of seabed mining. Furthermore, the parallel structure allows for the expansion of the number of spiral collection devices to adapt to different collection depths.

[0032] Among them, the collection port 41 can be independently designed according to the required collection particle size, so that pre-screening can be completed during the collection process to collect rare earth minerals that meet the particle size requirements, while waste soil that does not meet the requirements will be rotated and centrifuged by the front spiral body 4 to its periphery and then transported to the rear side.

[0033] Specifically, when the dual-shaft motor 11 drives the front spiral 4 and the rear spiral 5 to rotate through the front shaft 12 and the rear screw 13 respectively, the collection port 41 guides the marine mud into the front chamber 21, and the mine car sucks in the marine mud in the front chamber 21 through the collection pipe 14 to separate it into rare earth and waste soil, and sends the waste soil into the rear chamber 31 through the waste discharge pipe 15. At the same time, the dual-shaft motor 11 discharges the waste soil in the rear chamber 31 from the waste discharge port 51 through the rear screw 13 to backfill the mining channel.

[0034] To make the front helical body 4 rotate, the helical collection device can be rotated forward, thus driving the mine car forward, such as... Figure 2 As shown, the outer spirals of the front spiral 4 and the rear spiral 5 are Archimedean spirals. The front end of the front spiral 4 is a cone 42, and multiple scrapers 421 are formed on the cone surface of the cone 42. The multiple scrapers 421 are distributed around the cone surface of the cone 42.

[0035] Specifically, the outer spirals of the front spiral 4 and the rear spiral 5 are Archimedean spirals, so that when the front spiral 4 and the rear spiral 5 rotate, a thrust is generated in the axial direction to drive the spiral collection device to rotate. Of course, during the spiraling process, the front end of the front spiral 4 is a cone 42, which reduces the spiraling resistance. The multiple scrapers 421 on the cone surface of the cone 42 can scrape the marine mud in the spiraling direction layer by layer to disperse and guide it into the collection port 41. Any mud that does not meet the requirements will be centrifuged to the periphery.

[0036] To allow the seabed sample introduced through the collection port 41 to enter the bottom of the front chamber 21 more quickly and be sucked in by the collection pipe 14, such as... Figure 2 As shown, the inner diameter of the front groove chamber 21 gradually increases and then decreases from front to back along its axial direction to form an annular groove 211 in the groove bottom area near the front groove chamber 21. The end of the collection tube 14 located in the front groove chamber 21 faces the bottom of the annular groove 211.

[0037] Specifically, the front chamber 21 adopts a conical design. The marine mud entering the front chamber 21 slides down to the annular groove 211 under the action of gravity, and the end of the collection tube 14 is located at the annular groove 211. That is, after the marine mud enters the front chamber 21, it can quickly flow to the collection tube 14 and be sucked away.

[0038] Of course, in order to further improve the speed of transporting marine mud and avoid the impact of empty suction on collection efficiency, such as Figure 2 , Figure 3 As shown, a helical blade 121 is provided on the front shaft 12. The helical blade 121 is distributed in the front groove chamber 21 and is located at the front end of the front groove chamber 21. The diameter of the spiral blade 121 gradually increases from front to back along its axial direction to get close to the inner wall of the front chamber 21.

[0039] Specifically, a spiral blade 121 is provided on the front shaft 12. When the front shaft 12 drives the front spiral body 4 to rotate, the spiral blade 121 rotates synchronously in the front chamber 21, thereby actively transporting the marine mud entering the front chamber 21 to the annular groove 211, that is, to the end of the collection pipe 14, which increases the speed of marine mud transportation and improves the ore collection efficiency.

[0040] The amount of waste soil generated after the marine mud treatment is reduced relative to the total amount of marine mud. In order to ensure uniform backfilling, such as Figure 2 As shown, the inner diameter of the front section of the rear chamber 31 is constant from front to back along its axial direction, while the inner diameter of the rear section of the rear chamber 31 gradually increases from front to back along its axial direction. The rear screw 13 includes a straight screw 131 and a variable diameter screw 132. The straight screw 131 and the variable diameter screw 132 are coaxially connected. The straight screw 131 is located in the front section of the rear groove chamber 31, i.e., the first chamber 311, and the variable diameter screw 132 is located in the rear section of the rear groove chamber 31, i.e., the second chamber 312, so as to be close to the inner wall of the rear groove chamber 31.

[0041] Specifically, the rear section of the rear chamber 31 adopts a conical design so that after the waste soil is discharged into the rear chamber 31, it can be transported by the straight screw 131 and the variable diameter screw 132 and gradually spread to the surrounding area. Thus, after being discharged from the waste outlet 51, the waste soil is relatively evenly dispersed in the drilling channel, rather than concentrated in the middle of the drilling channel, effectively reducing the probability of the drilling channel collapsing and affecting the seabed environment.

[0042] Of course, during the ore collection process, the spiral collection device needs to be able to adjust its depth vertically to adapt to the distribution of rare earth-rich ore at different depths in different areas. Based on this, the following preferred embodiments are provided.

[0043] like Figure 2 As shown, multiple telescopic components 6 are provided between the front connecting body 2 and the rear connecting body 3. The multiple telescopic components 6 are distributed around the end faces of the front connecting body 2 and the rear connecting body 3, and the multiple telescopic components 6 work independently. The intermediate body 1 is movably connected to the front connecting body 2 and the rear connecting body 3, and multiple telescopic components 6 are located inside the intermediate body 1.

[0044] Specifically, the front connecting body 2 and the rear connecting body 3 are connected by multiple telescopic members 6. When the multiple telescopic members 6 work independently, the angle between the front connecting body 2 and the rear connecting body 3 can be changed, thereby adjusting the direction of rotation and realizing the upward, downward, and left-right rotation adjustment of the spiral collection device. Based on this, a preferred embodiment of the telescopic member 6 is provided below.

[0045] like Figure 2As shown, the telescopic component 6 includes a telescopic cylinder 61. Both ends of the telescopic cylinder 61 are provided with ball heads 62. Ball grooves are provided at the rear end of the front connecting body 2 and the front end of the rear connecting body 3. The two ball heads 62 of the telescopic cylinder 61 are respectively rotatably installed in the two opposite ball grooves of the front connecting body 2 and the rear connecting body 3. Among them, after the multiple telescopic cylinders 61 independently extend and retract to adjust their length, the angles of the front connecting body 2 and the rear connecting body 3 are changed to adjust the direction of rotation.

[0046] Specifically, the telescopic component 6 is composed of a telescopic cylinder 61 and a ball head 62. During the telescopic adjustment of the telescopic cylinder 61, the ball head 62 rotates adaptively to adjust the angle of the telescopic cylinder 61, so that the front connecting body 2 and the rear connecting body 3 can complete the angle adjustment.

[0047] Of course, such as Figure 2 As shown, a soft sealing body 16 is provided between the intermediate body 1 and the front connecting body 2, and between the intermediate body 1 and the rear connecting body 3. The intermediate body 1 is movably connected to the front connecting body 2 and the rear connecting body 3 through the soft sealing body 16.

[0048] Specifically, the soft seal 16 can seal the interior of the intermediate body 1, preventing the dual-axis motor 11 from being disturbed, and also does not affect the movement of the front connector 2 and the rear connector 3.

[0049] The coupling is a universal coupling, which can maintain power transmission even after the angle between the front connecting body 2 and the rear connecting body 3 changes, and has the ability to stretch and compress to adapt to the change in the distance between the front connecting body 2 and the rear connecting body 3.

[0050] like Figure 1 , Figure 2 As shown, a spring member 17 is provided on the outer wall of the intermediate body 1. The intermediate body 1 is mounted on the mine car through the spring member 17, and two adjacent intermediate bodies 1 are connected through the spring member 17. The portions of the collection tube 14 and the waste discharge tube 15 located outside the intermediate body 1 are disposed inside the spring member 17.

[0051] Specifically, the spring element 17 is used to protect the collection tube 14 and the waste discharge tube 15 to prevent them from being overstretched and damaged due to forward resistance. In addition, the resistance of the spring element 17 is low, so it has little impact on the spiral collection device's rotation.

[0052] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention should not depart from the spirit and scope of the present invention. Those skilled in the art can also make other changes within the spirit of the present invention and use them in the design of the present invention, as long as they do not deviate from the technical effects of the present invention. These changes made according to the spirit of the present invention should all be included within the scope of protection claimed by the present invention.

Claims

1. A spiral collection device, characterized in that, include: Intermediate body (1), front connector (2), rear connector (3), front helical body (4), rear helical body (5); The front and rear ends of the intermediate body (1) are movably connected to a front connector (2) and a rear connector (3), respectively; the interior of the intermediate body (1) is equipped with a dual-axis motor (11), a collection tube (14) and a waste discharge tube (15). The front connecting body (2) is rotatably fitted with a front helical body (4), and the rear connecting body (3) is rotatably fitted with a rear helical body (5). The two ends of the dual-axis motor (11) are connected to a front shaft (12) and a rear screw (13) respectively via couplings. The front end of the front shaft (12) passes through the front connector (2) and is fixed on the inner wall of the front screw (4). The rear end of the rear screw (13) passes through the rear connector (3) and is fixed on the inner wall of the rear screw (5) so that the dual-axis motor (11) can synchronously drive the front screw (4) and the rear screw (5). The rear helix (5) has multiple waste outlets (51) through it on the rear end face, and the rear end of the rear connector (3) forms a rear groove chamber (31), and the waste outlets (51) are connected to the rear groove chamber (31). One end of the collection tube (14) extends into the front connector (2), one end of the waste discharge tube (15) extends into the rear connector (3), and the other ends of the collection tube (14) and the waste discharge tube (15) extend out of the intermediate body (1). The dual-shaft motor (11) drives the front helical body (4) and the rear helical body (5) to rotate through the front shaft (12) and the rear screw (13), respectively. The front helical body (4) guides the marine mud into the front connecting body (2). The mine car sucks in the marine mud in the front connecting body (2) through the collection pipe (14) and separates it into rare earth and waste soil. The waste soil is sent into the rear connecting body (3) through the waste discharge pipe (15). The dual-shaft motor (11) discharges the waste soil in the rear connecting body (3) from the waste discharge port (51) through the rear screw (13) to backfill the mining channel.

2. The spiral sampling device according to claim 1, characterized in that, The front end of the front connector (2) is formed with a front groove (21). The front groove (21) is conical, and its inner diameter gradually increases and then decreases from front to back along its axis, so as to form an annular groove (211) in the groove bottom area near the front groove (21). The front end face of the front spiral (4) is provided with multiple collection ports (41), and the collection ports (41) are connected to the front groove chamber (21). The rear chamber (31) includes a first chamber (311) and a second chamber (312) that pass through each other. The inner diameter of the first chamber (311) is constant from front to back along its axial direction, and the inner diameter of the second chamber (312) gradually increases from front to back along its axial direction to form a cone shape. One end of the collection tube (14) extends into the front chamber (21), and one end of the waste discharge tube (15) extends into the rear chamber (31).

3. The spiral sampling device according to claim 1, characterized in that, The outer spirals of the front spiral (4) and the rear spiral (5) are Archimedean spirals. The front end of the front spiral (4) is a cone (42), and multiple scrapers (421) are distributed around the cone surface of the cone (42).

4. The spiral collection device according to claim 2, characterized in that, The front shaft (12) is provided with a spiral blade (121), which is distributed at the front end of the front groove chamber (21); and the diameter of the spiral blade (121) gradually increases from front to back along its axial direction to be close to the inner wall of the front groove chamber (21).

5. The spiral sampling device according to claim 2, characterized in that, The rear screw (13) includes a straight screw (131) and a variable diameter screw (132). The straight screw (131) and the variable diameter screw (132) are coaxially connected, and the straight screw (131) is located in the first chamber of the rear groove chamber (31), while the variable diameter screw (132) is located in the second chamber of the rear groove chamber (31).

6. The spiral sampling device according to claim 1, characterized in that, The intermediate body (1) is also provided with a plurality of telescopic components (6) connecting the front connector (2) and the rear connector (3), and the plurality of telescopic components (6) are distributed around the end faces of the front connector (2) and the rear connector (3); the telescopic component (6) includes a telescopic cylinder (61) and ball heads (62) provided at both ends of the telescopic cylinder (61); the rear end of the front connector (2) and the front end of the rear connector (3) are both provided with ball grooves; the balls at both ends of the telescopic cylinder (61) are respectively rotatably installed in the ball grooves at the rear end of the front connector (2) and the front end of the rear connector (3).

7. The spiral sampling device according to claim 1, characterized in that, It also includes a soft seal (16), the intermediate body (1) being movably connected to the front connector (2) and the rear connector (3) through the soft seal (16).

8. The spiral sampling device according to claim 1, characterized in that, It also includes a spring member (17) disposed on the outer wall of the intermediate body (1); the portions of the collection tube (14) and the waste discharge tube (15) located outside the intermediate body (1) are disposed inside the spring member (17).

9. A ore collection system, characterized in that, It includes a mining car and a plurality of spiral harvesting devices as described in any one of claims 1 to 8, wherein the spiral harvesting devices are disposed at the bottom of the mining car.

10. The ore collection system according to claim 9, characterized in that, Multiple spiral collection devices are arranged sequentially from top to bottom from the bottom of the mine car, and the multiple spiral collection devices are distributed in multiple rows; the outer ends of multiple collection pipes (14) are connected in parallel, and the outer ends of the waste discharge pipe (15) are connected in parallel and installed inside the mine car to form a parallel structure.

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