Spiral collecting device and its ore collecting system

Abstract

The application discloses a spiral collecting device, which comprises a mine car, a plurality of spiral collecting devices are arranged in multiple columns from top to bottom at the bottom of the mine car, the spiral collecting device comprises a middle body, a front connecting body with a front groove chamber, a front spiral body with a collecting port, a rear connecting body with a rear groove chamber and a rear spiral body with a waste discharge port, and the middle body is provided with a collecting pipe and a waste discharge pipe to connect the mine car. The spiral collecting device is arranged in an array at the bottom of the mine car, the spiral collecting device can guide sea mud from the collecting port into the front groove chamber through the rotation of the front spiral body, the mine car sucks the sea mud in each front groove chamber through the parallel collecting pipes, discharges the waste soil into each rear groove chamber through the parallel waste discharge pipes after treatment, and the spiral collecting device extrudes the waste soil from the waste discharge port through the rear screw rod to backfill the drilling channel, so that the mine car realizes the walking and collecting while mining and backfilling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of deep-sea mining, in particular to a spiral collecting device and a mining system thereof. BACKGROUND

[0002] Rare earth elements are widely distributed in marine sediments, rocks and hydrothermal sulfides, especially in the marine mud of the abyssal plain. However, the high pressure, low temperature and strong corrosion of the deep-sea environment pose great challenges to mining technology.

[0003] Currently, deep-sea rare earth mining mainly uses a single-station negative pressure suction mining system. This system forms a drill hole on the seabed through a vertical drilling assembly, uses negative pressure to suck marine mud or sand, and then extracts rare earth elements through a separation device and discharges waste soil. After mining is completed, the waste soil needs to be backfilled into the drill hole and then moved to the next area for repeated operation. The disadvantages of this method are:

[0004] Low efficiency of sequential operation: mining, backfilling and moving must be performed in sequence, which cannot be performed simultaneously, resulting in low overall efficiency. Large environmental disturbance: concentrated mining and backfilling can cause large-scale disturbance of marine sediments, forming plumes and affecting marine ecology. Poor adaptability: single-station systems are difficult to adapt to different depths of mineral layer distribution and cannot dynamically adjust the mining path.

[0005] To solve the above problems, the prior art has attempted a multi-station parallel mining scheme, but still has the following shortcomings:

[0006] Complex structure: multi-station systems usually rely on independent drive units, resulting in large equipment size and high energy consumption.

[0007] Uneven backfilling: uneven distribution of waste soil during backfilling can easily cause seabed topography collapse or local accumulation.

[0008] Lack of flexibility: lack of dynamic adjustment capability, making it difficult to cope with complex seabed topography or changes in mineral layers.

[0009] Therefore, there is an urgent need for a deep-sea mining system that can simultaneously perform mining, backfilling and moving, and has high efficiency, environmental friendliness and flexibility. SUMMARY

[0010] The present application aims to overcome at least one of the above-mentioned deficiencies of the prior art, and provides a spiral collecting device to solve the technical problem that it is difficult to simultaneously perform mining, backfilling and moving in the prior art, thereby affecting the mining efficiency of deep-sea rare earth-rich mines.

[0011] Specifically, the application protects a spiral collecting device, which comprises a middle 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 middle body are movably connected with the front connecting body and the rear connecting body respectively. The inside of the middle body is provided with a double-shaft motor, a collecting pipe and a waste pipe. The front connecting body is rotatably sleeved with the front spiral body, and the rear connecting body is rotatably sleeved with the rear spiral body. The two ends of the double-shaft motor are connected with a front shaft and a rear screw rod through a shaft coupling respectively. The front end of the front shaft penetrates through the front connecting body and is fixed on the inner wall of the front spiral body, and the rear end of the rear screw rod penetrates through the rear connecting body and is fixed on the inner wall of the rear spiral body, so as to realize the synchronous driving of the front spiral body and the rear spiral body by the double-shaft motor. One end of the collecting pipe extends into the front connecting body, one end of the waste pipe extends into the rear connecting body, and the other ends of the collecting pipe and the waste pipe extend out of the middle body. The double-shaft motor drives the front spiral body and the rear spiral body to rotate in through the front shaft and the rear screw rod respectively. The front spiral body guides the sea mud into the front connecting body. The mine car separates the sea mud in the front connecting body into rare earth and waste soil through the collecting pipe, and sends the waste soil into the rear connecting body through the waste pipe. The double-shaft motor discharges the waste soil in the rear connecting body from the waste outlet through the rear screw rod, so as to backfill the mining channel.

[0012] Further, the front end of the front connecting body is formed with a front groove chamber, the front groove chamber is conical, the inner diameter thereof gradually increases along the axial direction from front to rear and then gradually decreases, so as to form an annular groove at the groove bottom region close to the front groove chamber. A plurality of collecting ports are provided on the front end face of the front spiral body in a penetrating manner, and the collecting ports are communicated with the front groove chamber. The rear end of the rear connecting body is formed with a rear groove chamber, the rear groove chamber comprises a first cavity and a second cavity which are penetrated, the inner diameter of the first cavity is constant along the axial direction from front to rear, and the inner diameter of the second cavity gradually increases along the axial direction from front to rear to form a conical shape. A plurality of waste outlets are provided on the rear end face of the rear spiral body in a penetrating manner, and the waste outlets are communicated with the rear groove chamber. One end of the collecting pipe extends into the front groove chamber, one end of the waste pipe extends into the rear groove chamber, and the end portion located in the front groove chamber faces the bottom of the annular groove. When the double-shaft motor drives the front spiral body and the rear spiral body to rotate in through the front shaft and the rear screw rod respectively, the collecting ports guide the sea mud into the front groove chamber, and the mine car separates the sea mud in the front groove chamber into rare earth and waste soil through the collecting pipe, and sends the waste soil into the rear groove chamber through the waste pipe. At the same time, the double-shaft motor discharges the waste soil in the rear groove chamber from the waste outlet through the rear screw rod, so as to backfill the mining channel.

[0013] Preferably, the outer helix of the front helix body and the rear helix body is an Archimedes helix, the front end of the front helix body is a tapered head, and a plurality of scrapers are distributed around the tapered surface of the tapered head.

[0014] Further, the front shaft is provided with helical blades, which are distributed at the front end in the front groove chamber; and the diameter of the helical blades gradually increases along the axial direction thereof from front to back to be close to the inner wall of the front groove chamber.

[0015] Further, the rear screw rod comprises a straight screw rod and a variable-diameter screw rod, the straight screw rod and the variable-diameter screw rod are coaxially connected, and the straight screw rod is located in the first chamber of the rear groove chamber, and the variable-diameter screw rod is located in the second chamber of the rear groove chamber.

[0016] Further, the intermediate body is further provided with a plurality of expansion joints connecting the front connecting body and the rear connecting body, the plurality of expansion joints are distributed around the end surface of the front connecting body and the rear connecting body; the expansion joint comprises an expansion cylinder and a ball head arranged at both ends of the expansion cylinder; the rear end of the front connecting body and the front end of the rear connecting body are provided with ball grooves; and the balls at both ends of the expansion cylinder are rotatably arranged in the ball grooves of the rear end of the front connecting body and the front end of the rear connecting body. After the plurality of expansion cylinders are independently expanded and contracted to adjust the length, the angle of the front connecting body and the rear connecting body is changed to adjust the direction of rotation.

[0017] Preferably, the helical collecting device further comprises a soft sealing body, and the intermediate body is movably connected with the front connecting body and the rear connecting body through the soft sealing body.

[0018] Preferably, the helical collecting device further comprises a spring member arranged on the outer wall of the intermediate body; and the part of the collecting pipe and the waste pipe located outside the intermediate body is arranged in the spring member. The intermediate body is mounted on the mine car through the spring member, and the upper and lower adjacent intermediate bodies are connected through the spring member.

[0019] The application also protects a mining system, which comprises a mine car and a plurality of the above-mentioned helical collecting devices arranged at the bottom of the mine car.

[0020] Further, the plurality of helical collecting devices are sequentially arranged from top to bottom at the bottom of the mine car, and the plurality of helical collecting devices are distributed in multiple rows; the outer ends of the plurality of collecting pipes are connected in parallel, and the outer ends of the waste pipes are connected in parallel and mounted in the mine car to form a parallel structure.

[0021] Compared with the prior art, the helical collecting device has the following beneficial effects:

[0022] The invention adopts the parallel spiral drilling and walking ore collecting mode, the array distributed spiral collecting device is arranged at the bottom of the mine car, the spiral collecting device can guide the sea mud from the collecting port into the front groove chamber through the front spiral body rotation drilling, the mine car sucks the sea mud in each front groove chamber through the parallel collecting pipe, and then discharges the waste soil to each rear groove chamber through the parallel waste discharge pipe, and the spiral collecting device extrudes the waste soil from the waste discharge port through the rear screw rod to backfill the drilling channel, so that the walking ore collecting is realized. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structural schematic diagram of the deep sea rare earth rich spiral parallel ore collecting system is provided for the embodiment of the invention.

[0024] Figure 2 The spiral collecting device part structural schematic diagram of the deep sea rare earth rich spiral parallel ore collecting system is provided for the embodiment of the invention.

[0025] Figure 3 The spiral leaf part structural schematic diagram of the deep sea rare earth rich spiral parallel ore collecting system is provided for the embodiment of the invention.

[0026] Figure 4 The rear groove chamber schematic diagram of the deep sea rare earth rich spiral parallel ore collecting system is provided for the embodiment of the invention,

[0027] The numbers in the figure respectively represent as follows:

[0028] 1-intermediate body; 2-front connecting body; 3-rear connecting body; 4-front spiral body; 5-rear spiral body; 6-telescopic part;

[0029] 11-double shaft motor; 12-front shaft; 13-rear screw rod; 14-collecting pipe; 15-waste discharge pipe; 16-soft sealing body; 17-spring part; 21-front groove chamber; 31-rear groove chamber; 41-collecting port; 42-cone head; 51-waste discharge port; 61-telescopic cylinder; 62-ball head;

[0030] 121-spiral leaf; 131-straight screw rod; 132-variable diameter screw rod; 211-annular groove; 421-scraper;

[0031] 311-first chamber; 312-second chamber. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described in detail with reference to the accompanying drawings. In the drawings, identical or similar labels represent identical or similar elements or elements having identical or similar functions throughout. The described embodiments are part of the embodiments of the present application, rather than all the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] It should be noted that if the present application has any directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indication also changes accordingly.

[0034] In addition, if the present application has any description of "first", "second", etc., the description of "first", "second", etc. is only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person of ordinary skill in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0035] Embodiments

[0036] As shown in Figure 1 , Figure 2 The present application provides a spiral parallel mining system suitable for deep-sea rare earth-rich mining, which comprises a mine car, and a plurality of spiral collection devices are arranged on the bottom of the mine car from top to bottom.

[0037] The spiral collection device comprises an intermediate body 1, a front connecting body 2 and a rear connecting body 3 are arranged at the front and rear ends of the intermediate body 1 respectively, and a front spiral body 4 and a rear spiral body 5 are rotatably sleeved on the front connecting body 2 and the rear connecting body 3 respectively.

[0038] A front groove chamber 21 is formed at the front end of the front connecting body 2, a plurality of collection openings 41 are formed through the front end surface of the front spiral body 4, and the collection openings 41 are communicated with the front groove chamber 21, a rear groove chamber 31 is formed at the rear end of the rear connecting body 3, a plurality of waste discharge openings 51 are formed through the rear end surface of the rear spiral body 5, and the waste discharge openings 51 are communicated with the rear groove chamber 31.

[0039] The double-shaft motor 11 is arranged in the intermediate body 1, and the front shaft 12 and the rear screw rod 13 are connected to two ends of the double-shaft motor 11 through couplings, respectively, the front end of the front shaft 12 penetrates through the front connecting body 2 and is fixed to the inner wall of the front spiral body 4, and the rear end of the rear screw rod 13 penetrates through the rear connecting body 3 and is fixed to the inner wall of the rear spiral body 5, so as to synchronously drive the front spiral body 4 and the rear spiral body 5.

[0040] The collecting pipe 14 and the waste pipe 15 are arranged in the intermediate body 1, respectively, one end of the collecting pipe 14 extends into the front groove chamber 21, one end of the waste pipe 15 extends into the rear groove chamber 31, and the other ends of the collecting pipe 14 and the waste pipe 15 extend out of the intermediate body 1, and the outer ends of the collecting pipes 14 of the plurality of spiral collecting devices are connected in parallel, and the outer ends of the waste pipes 15 are connected in parallel, and then are installed in the inside of the mine car to form a parallel structure.

[0041] The parallel mining system of the application mainly comprises a plurality of arrayed spiral collecting devices arranged at the bottom of the mine car, the spiral collecting device is connected with the mine car through the intermediate body 1, the two ends of the intermediate body 1 are provided with the front connecting body 2 and the rear connecting body 3, and the front spiral body 4 and the rear spiral body 5 are arranged outside the two bodies and can rotate, so that the spiral collecting device can rotate in, the end collecting port 41 of the front spiral body 4 can guide the sea mud into the front groove chamber 21 of the front connecting body 2 during the rotating-in process, so that the sea mud is sucked into the mine car through the collecting pipe 14 and is processed into rare earth and waste soil, the waste soil is discharged into the rear groove chamber 31 of the rear connecting body 3 through the waste pipe 15, and is extruded by the rear screw rod 13 and discharged from the waste discharge port 51, so that the waste soil backfills the rotating-in channel.

[0042] The front spiral body 4 and the rear spiral body 5 are driven by the front shaft 12 and the rear screw rod 13, respectively, and the front shaft 12 and the rear screw rod 13 are synchronously driven by the double-shaft motor 11.

[0043] Compared with the existing mining system, the parallel mining system of the application adopts parallel spiral drilling and walking mining, the spiral collecting device arranged at the bottom of the mine car can rotate in, the front spiral body 4 of the spiral collecting device guides the sea mud from the collecting port 41 into the front groove chamber 21 during the rotating-in process, and the sea mud is sucked into the mine car through the collecting pipe 14 and is processed, and the mine car transports the waste soil into the rear groove chamber 31 through the waste pipe 15, so that the waste soil is extruded by the rear screw rod 13 and discharged from the waste discharge port 51, thereby backfilling the rotating-in channel, the plume caused is less, the influence of seabed mining on the environment is reduced, and the parallel structure can expand the number of spiral collecting devices to adapt to different collection depths.

[0044] The collecting port 41 can be independently designed according to the required collection particle size, so that the pre-screening can be completed during the collection process to collect the rare earth ore meeting the particle size requirement, and the waste soil not meeting the requirement is rotated and centrifuged to the side of the front spiral body 4 and is transported to the rear side.

[0045] Specifically, when the double-shaft motor 11 drives the front screw body 4 and the rear screw body 5 to rotate by the front shaft 12 and the rear screw rod 13 respectively, the collection port 41 guides the sea mud into the front tank chamber 21, and the mine car sucks the sea mud in the front tank chamber 21 into the separation through the collection pipe 14 to separate the rare earth and the waste soil, and the waste soil is sent into the rear tank chamber 31 through the waste pipe 15, and at the same time, the double-shaft motor 11 drives the waste soil in the rear tank chamber 31 to be discharged from the waste port 51 by the rear screw rod 13, so as to backfill the mining channel.

[0046] In order to make the front screw body 4 rotate, the screw collection device can be rotated to drive the mine car to move forward, as shown in Figure 2 The outer screw of the front screw body 4 and the rear screw body 5 is an Archimedes screw, the front end of the front screw body 4 is a tapered head 42, and a plurality of scrapers 421 are formed on the tapered surface of the tapered head 42 and are distributed around the tapered surface of the tapered head 42.

[0047] Specifically, the outer screw of the front screw body 4 and the rear screw body 5 adopts an Archimedes screw, so that a thrust is formed in the axial direction when the front screw body 4 and the rear screw body 5 rotate, so as to drive the screw collection device to rotate;

[0048] Of course, in the process of rotating, the front end of the front screw body 4 is a tapered head 42, which reduces the rotating resistance, and the plurality of scrapers 421 on the tapered surface of the tapered head 42 can scrape the sea mud in the rotating direction layer by layer to be introduced into the collection port 41, and the sea mud that does not meet the requirements is centrifuged to the side.

[0049] In order to make the sea bottom introduced by the collection port 41 enter the bottom of the front tank chamber 21 to be sucked by the collection pipe 14 faster, as shown in Figure 2 The inner diameter of the front tank chamber 21 gradually increases along the axial direction from front to back and then decreases, so as to form an annular groove 211 near the tank bottom area of the front tank chamber 21;

[0050] The end of the collection pipe 14 in the front tank chamber 21 is directed to the bottom of the annular groove 211.

[0051] Specifically, the front tank chamber 21 adopts a tapered design, and the sea mud entering the front tank chamber 21 slides to the annular groove 211 under the action of gravity, and the end of the collection pipe 14 is located at the annular groove 211, that is, the sea mud can quickly flow to the collection pipe 14 to be sucked away after entering the front tank chamber 21.

[0052] Of course, in order to further improve the speed of conveying the sea mud and avoid the influence of air suction on the collection efficiency, as shown in Figure 2 , Figure 3 A spiral blade 121 is arranged on the front shaft 12, the spiral blade 121 is distributed in the front tank chamber 21, and the spiral blade 121 is located at the front end of the front tank chamber 21.

[0053] The diameter of the helical blade 121 gradually increases from front to back along the axial direction thereof to be close to the inner wall of the front groove chamber 21.

[0054] Specifically, the helical blade 121 is arranged on the front shaft 12, and the helical blade 121 rotates synchronously in the front groove chamber 21 when the front spiral body 4 is driven to rotate, so that the sea mud entering the front groove chamber 21 can be actively transported to the annular groove 211, that is, the end of the collection pipe 14, thereby increasing the speed of sea mud transportation and improving the mining efficiency.

[0055] After the sea mud is processed, the amount of waste soil formed will be reduced relative to the total amount of sea mud. In order to make the backfill uniform, the inner diameter of the front section of the rear groove chamber 31 is constant from front to back along the axial direction thereof, and the inner diameter of the rear section of the rear groove chamber 31 gradually increases from front to back along the axial direction thereof. Figure 2

[0056] The rear shaft 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 front section of the rear groove chamber 31, that is, the first chamber 311, and the variable-diameter screw 132 is located in the rear section of the rear groove chamber 31, that is, the second chamber 312, to be close to the inner wall of the rear groove chamber 31.

[0057] Specifically, the rear section of the rear groove chamber 31 is designed in a conical shape, so that after the waste soil is discharged into the rear groove chamber 31, it can be transported by the straight screw 131 and the variable-diameter screw 132 and gradually spread to the four directions, so that after being discharged from the waste discharge port 51, the waste soil is relatively uniformly dispersed in the drilling passage, rather than concentrated in the middle of the drilling passage, effectively reducing the probability of collapse of the drilling passage affecting the seabed environment.

[0058] Of course, during the mining process, the helical collection device needs to be able to adjust the depth up and down to adapt to the distribution of rare earth-rich ore at different depths in different regions. Based on this, the following preferred embodiments are provided.

[0059] As shown in Figure 2 A plurality of stretchable members 6 are arranged between the front connecting body 2 and the rear connecting body 3, the plurality of stretchable members 6 are distributed around the end faces of the front connecting body 2 and the rear connecting body 3, and the plurality of stretchable members 6 work independently.

[0060] The intermediate body 1 is movably connected between the front connecting body 2 and the rear connecting body 3, and the plurality of stretchable members 6 are located in the intermediate body 1.

[0061] Specifically, the front connecting body 2 and the rear connecting body 3 are connected by the plurality of stretchable members 6, so that when the plurality of stretchable 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 up, down and left-right turning adjustment of the helical collection device. Based on this, the following provides a preferred embodiment of a stretchable member 6. ​

[0062] As Figure 2 shown, the telescopic part 6 comprises telescopic cylinders 61, both ends of the telescopic cylinders 61 are provided with ball heads 62, the rear end of the front connecting body 2 and the front end of the rear connecting body 3 are provided with ball grooves, and the two ball heads 62 of the telescopic cylinders 61 are respectively rotatably installed in the two ball grooves opposite to each other of the front connecting body 2 and the rear connecting body 3.

[0063] Among them, after the length of the plurality of telescopic cylinders 61 is independently adjusted, the angle of the front connecting body 2 and the rear connecting body 3 is changed to adjust the direction of rotation.

[0064] Specifically, the telescopic part 6 is composed of telescopic cylinders 61 and ball heads 62, and during the telescopic adjustment of the telescopic cylinders 61, the ball heads 62 are adaptively rotated to adjust the angle of the telescopic cylinders 61, so that the front connecting body 2 and the rear connecting body 3 can complete the angle adjustment.

[0065] Of course, as Figure 2 shown, the soft sealing body 16 is arranged between the intermediate body 1 and the front connecting body 2 and between the intermediate body 1 and the rear connecting body 3, and 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.

[0066] Specifically, the soft sealing body 16 can seal the inside of the intermediate body 1, avoid interference of the double-shaft motor 11, and also does not affect the movement of the front connecting body 2 and the rear connecting body 3.

[0067] Among them, the shaft coupling is a universal shaft coupling, which can still maintain power transmission after the angle between the front connecting body 2 and the rear connecting body 3 is changed, and has the ability of stretching and compression to adapt to the change of the distance between the front connecting body 2 and the rear connecting body 3.

[0068] As Figure 1 , Figure 2 shown, the spring part 17 is arranged on the outer wall of the intermediate body 1, the intermediate body 1 is installed on the mine car through the spring part 17, and the upper and lower adjacent two intermediate bodies 1 are connected through the spring part 17.

[0069] The part of the collection pipe 14 and the waste pipe 15 located outside the intermediate body 1 is arranged inside the spring part 17.

[0070] Specifically, the spring part 17 is used to protect the collection pipe 14 and the waste pipe 15, so as to avoid damage of the collection pipe 14 and the waste pipe 15 due to excessive stretching caused by forward resistance, and the resistance of the spring part 17 is relatively low, which has little effect on the rotation of the spiral collection device.

[0071] The above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application. Those skilled in the art can also make other changes in the design of the present application within the spirit of the present application, as long as the technical effects of the present application are not deviated. The changes made according to the spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A spiral collection device, characterized in that, The utility model relates to a kind of mining vehicles, including: Intermediate body (1), front connector (2), rear connector (3), front helix (4), rear helix (5); The front and rear ends of the intermediate body (1) are movably connected with the front connector (2) and the rear connector (3) respectively;The inside of the intermediate body (1) is provided with a double-shaft motor (11), a collecting pipe (14) and a waste pipe (15); The front helix (4) is rotatably sleeved on the front connector (2), and the rear helix (5) is rotatably sleeved on the rear connector (3); The two ends of the double-shaft motor (11) are connected with a front shaft (12) and a rear screw rod (13) through a shaft coupling respectively, the front end of the front shaft (12) penetrates through the front connector (2) and is fixed on the inner wall of the front helix (4), and the rear end of the rear screw rod (13) penetrates through the rear connector (3) and is fixed on the inner wall of the rear helix (5), so as to realize the synchronous driving of the front helix (4) and the rear helix (5) by the double-shaft motor (11); A plurality of waste outlets (51) are provided through the rear end surface of the rear helix (5), the rear end of the rear connector (3) forms a rear groove chamber (31), and the waste outlets (51) communicate with the rear groove chamber (31); One end of the collecting pipe (14) extends into the front connector (2), one end of the waste pipe (15) extends into the rear connector (3), and the other ends of the collecting pipe (14) and the waste pipe (15) extend out of the intermediate body (1); The double-shaft motor (11) drives the front helix (4) and the rear helix (5) to rotate in by the front shaft (12) and the rear screw rod (13) respectively, the front helix (4) guides the sea mud into the front connector (2), the mining vehicle separates the sea mud in the front connector (2) into rare earth and waste soil by sucking through the collecting pipe (14), and sends the waste soil into the rear connector (3) through the waste pipe (15), and the double-shaft motor (11) discharges the waste soil in the rear connector (3) from the waste outlets (51) through the rear screw rod (13) to backfill the mining channel.

2. The spiral collection device of claim 1, wherein, The front end of the front connector (2) forms a front groove chamber (21), the front groove chamber (21) is conical, the inner diameter thereof gradually increases and then decreases along the axial direction thereof from front to back, so as to form an annular groove (211) at the groove bottom region close to the front groove chamber (21); A plurality of collecting openings (41) are provided through the front end surface of the front helix (4), and the collecting openings (41) communicate with the front groove chamber (21); The rear groove chamber (31) comprises a through first chamber (311) and a second chamber (312), the inner diameter of the first chamber (311) is constant along the axial direction thereof from front to back, and the inner diameter of the second chamber (312) gradually increases along the axial direction thereof from front to back to form a conical shape;One end of the collecting pipe (14) extends into the front groove chamber (21), and one end of the waste pipe (15) extends into the rear groove chamber (31).

3. The spiral collection device of claim 1, wherein, The outer helix of the front helix body (4) and the rear helix body (5) is an Archimedes helix, the front end of the front helix body (4) is a tapered head (42), and a plurality of scrapers (421) are distributed around the tapered surface of the tapered head (42).

4. The spiral collection device of claim 2, wherein, The front shaft (12) is provided with helical blades (121) distributed at the front end in the front groove chamber (21); and the diameter of the helical blades (121) gradually increases along the axial direction thereof from front to back to be close to the inner wall of the front groove chamber (21).

5. The spiral collection device of claim 2, wherein, The rear screw rod (13) comprises a straight screw rod (131) and a variable-diameter screw rod (132), the straight screw rod (131) and the variable-diameter screw rod (132) are coaxially connected, the straight screw rod (131) is located in the first chamber of the rear groove chamber (31), and the variable-diameter screw rod (132) is located in the second chamber of the rear groove chamber (31).

6. The spiral collection device of claim 1, wherein, The intermediate body (1) is further provided with a plurality of expansion and contraction members (6) connecting the front connecting body (2) and the rear connecting body (3), the plurality of expansion and contraction members (6) are distributed around the end surface of the front connecting body (2) and the rear connecting body (3); the expansion and contraction member (6) comprises an expansion and contraction cylinder (61) and a ball head (62) arranged at both ends of the expansion and contraction cylinder (61); the rear end of the front connecting body (2) and the front end of the rear connecting body (3) are both provided with a ball groove; the ball heads at both ends of the expansion and contraction cylinder (61) are rotatably installed in the ball grooves of the rear end of the front connecting body (2) and the front end of the rear connecting body (3) respectively.

7. The spiral harvesting device of claim 1, wherein, A soft sealing body (16) is further included, and the intermediate body (1) is movably connected with the front connecting body (2) and the rear connecting body (3) through the soft sealing body (16).

8. The spiral harvesting device according to claim 1, wherein, A spring member (17) is further arranged on the outer wall of the intermediate body (1); and the collecting pipe (14) and the waste pipe (15) are arranged inside the spring member (17).

9. A mining system characterized by, The mining vehicle comprises a mining vehicle and a plurality of helix collecting devices according to any one of claims 1-8, and the helix collecting devices are arranged at the bottom of the mining vehicle.

10. A gathering system according to claim 9, wherein, The plurality of helix collecting devices are arranged from top to bottom at the bottom of the mining vehicle, and the plurality of helix collecting devices are arranged in multiple rows; the outer ends of the plurality of collecting pipes (14) are connected in parallel, and the outer ends of the waste pipes (15) are connected in parallel to the inside of the mining vehicle to form a parallel structure.

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