A deep-sea polymetallic nodule collecting device

Abstract

The present application relates to the technical field of deep-sea mining, and particularly relates to a deep-sea polymetallic nodule collecting device, which comprises a grid cabin body, a grid shovel is arranged on one side of the grid cabin body in the advancing direction and is lower than the feed inlet, a conveying roller is arranged between the grid shovel and the feed inlet, a corrugated roller is arranged between the conveying roller and the feed inlet, and the grid shovel, the conveying roller and the corrugated roller jointly constitute a continuous conveying framework for conveying the polymetallic nodules to the feed inlet. The continuous conveying framework for conveying the polymetallic nodules to the grid cabin body is formed by arranging the conveying roller and the corrugated roller on the grid shovel, the polymetallic nodules scooped up by the grid shovel are pushed to the annular groove of the corrugated roller along the grid gap by the elastic pieces on the surface of the conveying roller, the polymetallic nodules are continuously conveyed to the grid cabin body for storage in the manner of rotating transportation and prying off by the crowbar, and the low-disturbance collection of the polymetallic nodules on the seabed is realized by matching the grid shovel for collection.

Description

TECHNICAL FIELD

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

[0002] The deep-sea polymetallic nodule is a kind of mineral deposit on the deep-sea bottom plane. The polymetallic nodule is usually accumulated on the deep-sea bottom plane in a semi-covered manner, and the material covering the polymetallic nodule is usually the deep-sea sediment and silt, which is in a muddy or loose state.

[0003] The existing deep-sea polymetallic nodule collecting device usually adopts a negative pressure suction method. The device is thrown into the deep sea to suck and filter the surface of the deep-sea bottom by using a negative pressure port. A filter screen with a large aperture is arranged to block the polymetallic nodule and discharge the excess sediment and silt. Although this device can collect the deep-sea polymetallic nodule, it needs to provide a high suction force to suck in the heavy polymetallic nodule, which causes a large suction phenomenon in the area. The sediment and silt are easily sucked in, which leads to the deep-sea organisms / microorganisms living in the sediment and silt being sucked away, and causes great damage to the regional environment of the deep-sea bottom.

[0004] Therefore, the existing collecting device adopting the negative pressure suction method causes great damage to the sediment in the area and affects the deep-sea bottom environment due to the need to maintain the suction force of the polymetallic nodule. SUMMARY

[0005] The present application aims to provide a deep-sea polymetallic nodule collecting device to solve the technical problem of the existing technology that the suction force of the polymetallic nodule needs to be maintained to cause great damage to the sediment in the area and affect the deep-sea bottom environment.

[0006] To solve the above technical problem, the present application specifically provides the following technical solution:

[0007] A deep-sea polymetallic nodule collecting device, comprising:

[0008] A grid cabin is provided with a grid shovel lower than the feed inlet on one side in the forward direction of the grid cabin. A conveying roller is arranged between the grid shovel and the feed inlet, and a corrugated roller is arranged between the conveying roller and the feed inlet. The grid shovel, the conveying roller and the corrugated roller jointly constitute a continuous conveying framework for collecting the polymetallic nodule and conveying it to the feed inlet.

[0009] A plurality of elastic pieces are arranged around the circumferential wall of the conveying roller, the plurality of elastic pieces are equidistantly arranged along the axial direction of the conveying roller, and the plurality of annular grooves of the corrugated roller are arranged in axial correspondence with the plurality of equidistantly arranged elastic pieces; a plurality of pry bars are arranged at the lower edge of the feeding port, and the plurality of pry bars are arranged in interlaced correspondence with the plurality of annular grooves.

[0010] When the grid cabin moves in the advancing direction, the grid shovel moves forward to shovel the multi-metallic nodules on the ground and guide the multi-metallic nodules to move along the grid gap of the grid shovel to the conveying roller.

[0011] The conveying roller is configured to rotate in the advancing direction, and when the conveying roller rotates, the elastic pieces rotate around the conveying roller and periodically pass through the grid gap of the grid shovel and the annular groove of the corrugated roller in sequence, so as to push the multi-metallic nodules into the annular groove along the grid gap.

[0012] The corrugated roller is configured to rotate in the advancing reverse direction, and when the corrugated roller rotates, the annular groove rotates and transports the multi-metallic nodules to the feeding port, and the pry bars pry the multi-metallic nodules to roll into the grid cabin from the feeding port.

[0013] As a preferred scheme of the present application, a support is arranged on the grid cabin, the grid shovel, the conveying roller and the corrugated roller are arranged at the end of the support facing the advancing direction, and the conveying roller is configured to roll on the ground in the conveying direction.

[0014] When the conveying roller rolls on the ground in the advancing direction, the elastic pieces periodically rotate in the advancing direction and provide forward thrust by contacting the ground.

[0015] As a preferred scheme of the present application, the grid shovel comprises a plurality of shovel strips, the plurality of shovel strips are equidistantly arranged along the axial direction of the conveying roller, and the grid gap is formed between two adjacent shovel strips.

[0016] The shovel strip is bent downward at the bottom of the conveying roller, and the shovel strip is configured to be elastically bent at the bent portion.

[0017] As a preferred scheme of the present application, the shovel strip is bent upward between the conveying roller and the corrugated roller to form a guide section, and the guide section is used to guide the multi-metallic nodules on the grid gap upward.

[0018] As a preferred scheme of the present application, the shovel strip is in a cylindrical structure, a plurality of guide grooves are arranged on both sides of the shovel strip, the guide grooves are arranged obliquely from top to bottom, the upper end is arranged toward the advancing direction, the lower end is arranged toward the advancing reverse direction, and the plurality of guide grooves are distributed to the guide section along the front end of the shovel strip.

[0019] As a preferred scheme of the present application, the edge of the slot mouth of the guide slot extending towards the center of the slot mouth forms a flow guide surface in the advancing direction, and the edge of the slot mouth of the guide slot extending away from the advancing direction forms a diffusion surface.

[0020] When the spade moves in the advancing direction, the flow guide surface guides the silt and the polymetallic nodule to move towards the conveying roller, and the guide slot guides the silt to leak from the diffusion surface.

[0021] As a preferred scheme of the present application, a plurality of roller slots are arranged on the surface of the conveying roller, the end of the elastic sheet is arranged in the roller slot, and the roller slot is aligned with the grid gap to form a conveying channel.

[0022] The elastic sheet is in an arc structure, and the elastic sheet is arranged to be capable of being compressed in the radial direction of the conveying roller and capable of being completely compressed into the roller slot;

[0023] When the elastic sheet rotates around the conveying roller, the elastic sheet periodically passes through the conveying channel from front to back, forming a pushing force on the polymetallic nodule on the grid gap.

[0024] As a preferred scheme of the present application, a guide plate is arranged between the crowbar and the feed port, the guide plate is inclined upward towards the corrugated roller, the edge of the guide plate is close to the surface of the corrugated roller, and the end of the crowbar extends into the annular groove and is close to the groove wall.

[0025] As a preferred scheme of the present application, the axial width of the annular groove is arranged to gradually decrease radially inward, and a rubber ring is arranged in the annular groove, the rubber ring is arranged to be capable of being compressed towards the inner wall of the annular groove.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The present application comprises a continuous conveying framework for collecting and conveying polymetallic nodules into the grid cabin by arranging a conveying roller and a corrugated roller on the grid spade, using the elastic sheet on the surface of the conveying roller to push the polymetallic nodules collected by the grid spade along the grid gap into the annular groove of the corrugated roller, and continuously conveying the polymetallic nodules into the grid cabin for storage by rotating the annular groove and stripping by the crowbar, and the grid spade is arranged to collect the polymetallic nodules from the seabed with low disturbance. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0029] Figure 1 The structural schematic diagram of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0030] Figure 2 The structural schematic diagram of the continuous conveying frame structure part of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0031] Figure 3 The structural schematic diagram of the grid shovel part of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0032] Figure 4 The structural schematic diagram of the conveying roller part of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0033] Figure 5 The structural schematic diagram of the corrugated roller part of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0034] Figure 6 The structural schematic diagram of the elastic sheet part of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0035] Figure 7 The structural schematic diagram of the guide groove part of the deep-sea polymetallic nodule collecting device provided by the embodiment of the present application is shown in the figure.

[0036] The numbers in the figure respectively represent as follows:

[0037] 1-grid cabin; 2-grid shovel; 3-conveying roller; 4-corrugated roller;

[0038] 11-feed inlet; 12-prying rod; 13-bracket; 21-grid gap; 22-shovel strip; 23-guide groove; 24-guide section; 31-elastic sheet; 32-roller groove; 41-annular groove; 42-rubber ring;

[0039] 231-flow guide surface; 232-diffusion surface. DETAILED DESCRIPTION

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figures 1-5 As shown, the present invention provides a deep-sea polymetallic nodule collection device, comprising:

[0042] The grid chamber 1 has a grid shovel 2 that is lower than its feed inlet 11 on one side of the grid chamber 1 in the forward direction. A conveying roller 3 is arranged between the grid shovel 2 and the feed inlet 11, and a corrugated roller 4 is arranged between the conveying roller 3 and the feed inlet 11. The grid shovel 2, the conveying roller 3 and the corrugated roller 4 together constitute a continuous conveying structure for collecting polymetallic nodules and conveying them to the feed inlet 11.

[0043] In this embodiment, the grid chamber 1 adopts a fully hollow design to reduce the resistance of underwater movement. The grid chamber 1, the grid shovel 2, the conveying roller 3, and the corrugated roller 4 are driven by underwater power equipment or other conventional driving methods, which drive the grid chamber 1 to push the grid shovel 2, the conveying roller 3, and the corrugated roller 4 forward to collect polymetallic nodules.

[0044] During the mobile collection process, the semi-covered polymetallic nodules are scooped up by the grid shovel 2 and move along the grid shovel 2 as the device moves forward. The conveying roller 3 rotates above the grid shovel 2 and pushes the grid shovel 2 to the polymetallic nodules at the designated position, pushing them onto the corrugated roller 4. The corrugated roller 4 rotates and transfers the polymetallic nodules to the feed inlet 11 of the grid chamber 1 on the other side, and they enter the grid chamber 1 for storage along the feed inlet 11, realizing the continuous conveying of polymetallic nodules from collection to storage.

[0045] During the aforementioned mobile collection process, the conveying roller 3 and the corrugated roller 4 are used to transfer the polymetallic nodules from the lower-level grid shovel 2 to the higher-level feed inlet 11. Therefore, in this embodiment, it also includes:

[0046] Multiple spring pieces 31 are arranged around the periphery of the conveying roller 3. The multiple spring pieces 31 are arranged at equal intervals along the axial direction of the conveying roller 3. The multiple annular grooves 41 of the corrugated roller 4 are axially distributed and corresponding to the multiple spring pieces 31 arranged in the axial direction. Multiple pry bars 12 are arranged at the lower edge of the feed inlet 11. The multiple pry bars 12 are staggered with the multiple annular grooves 41.

[0047] When the grid compartment 1 moves in the forward direction, the grid shovel 2 moves forward to scoop up the polymetallic nodules on the ground and guides the polymetallic nodules to move along the grid gap 21 of the grid shovel 2 toward the conveying roller 3.

[0048] Furthermore, the conveyor roller 3 is configured to rotate in the forward direction. When the conveyor roller 3 rotates, the spring piece 31 can rotate around the conveyor roller 3 and periodically pass through the grid gap 21 of the grid shovel 2 and the annular groove 41 of the corrugated roller 4 in sequence, pushing the polymetallic nodules into the annular groove 41 along the grid gap 21 and pressing them.

[0049] The corrugated roller 4 is configured to rotate in the opposite direction of forward movement. When the corrugated roller 4 rotates, the annular groove 41 rotates and transfers the polymetallic nodules to the feed inlet 11, where they are pried off by the pry bar 12 and rolled from the feed inlet 11 into the grid chamber 1.

[0050] In this embodiment, the spring piece 31 on the conveying roller 3 and the annular groove 41 of the corrugated roller 4 are axially corresponding. The rotation of the conveying roller 3 can rotate the spring piece 31 through the annular groove 41, and the rotation of the spring piece 31 around the conveying roller 3 can pass through the grid gap 21. The grid gap 21 carries the scooped-up multi-metal nodules. That is, the rotation of the spring piece 31 periodically pushes the multi-metal nodules carried by the grid gap 21 toward the corrugated roller 4 and presses them into the annular groove 41 of the corrugated roller 4, so that the annular groove 41 can carry the multi-metal nodules to one side of the grid compartment 1.

[0051] When the annular groove 41 transfers the polymetallic nodules to one side of the grid chamber 1, the pry bar 12 at the feed inlet 11 can provide resistance in the tangential direction of the inner surface of the annular groove 41. After being resisted, the polymetallic nodules are removed from the annular groove 41 and fall on the pry bar 12 and the gap between the pry bar 12. They fall under the action of gravity and the water resistance in the direction of movement and enter the grid chamber 1 from the feed inlet 11.

[0052] Therefore, compared with existing negative pressure suction collection devices, the collection device of the present invention can collect polymetallic nodules by moving a shovel on the seabed and transport them by rotation, effectively reducing the fluctuations generated by the device when working on the seabed, thereby reducing the interference with the seabed environment.

[0053] In addition, the grid gaps 21 of the grid shovel 2 can quickly pass sand and mud, achieving the separation of polymetallic nodules from sediments, and the separation effect is increased by the resistance of seawater during the movement.

[0054] like Figure 1 As shown, a bracket 13 is provided on the grid compartment 1, and the grid shovel 2, conveying roller 3 and corrugated roller 4 are provided at the ends of the bracket 13 facing the forward direction, and the conveying roller 3 is configured to be able to roll on the ground along the conveying direction.

[0055] Furthermore, as the conveyor roller 3 rolls on the ground in the forward direction, the spring 31 rotates periodically in the forward direction and contacts the ground to provide forward thrust.

[0056] In the embodiment, the conveying roller 3 can roll on the seabed, the elastic sheet 31 rotates around the axis of the conveying roller 3 on the surface of the conveying roller 3, and then the elastic sheet 31 intermittently sinks into the sediment, and the rotating direction of the elastic sheet 31 is consistent with the conveying roller 3, thereby forming a forward pushing force to provide power for the device to advance.

[0057] Of course, when collecting the polymetallic nodules, some of the polymetallic nodules are relatively large and are easy to be clamped between the grid shovel 2 and the conveying roller 3. Based on this, the following preferred embodiment is provided.

[0058] As shown in Figures 2-5 , the grid shovel 2 includes a plurality of shovel strips 22, the plurality of shovel strips 22 are equidistantly arranged along the axial direction of the conveying roller 3, and the grid gap 21 is formed between the adjacent two shovel strips 22.

[0059] The shovel strip 22 is bent downward at the bottom of the conveying roller 3, and the shovel strip 22 is arranged to be elastically bent at the bending part.

[0060] In the embodiment, the shovel strip 22 of the grid shovel 2 is bent downward at the bottom of the conveying roller 3, and the space between the conveying roller 3 and the grid gap 21 is as large as possible to accommodate the relatively large polymetallic nodules to pass through. In addition, the shovel strip 22 can be elastically bent, and for collecting the oversized polymetallic nodules, the shovel strip 22 can be bent to pass through the conveying roller 3.

[0061] The relatively large polymetallic nodules passing through the conveying roller 3 can be conveyed to the conveying roller 3 and the corrugated roller 4, and due to the relative rotation of the conveying roller 3 and the corrugated roller 4, the polymetallic nodules can be crushed and then extruded and embedded in the annular groove 41 for conveying, so that the size of the polymetallic nodules is relatively uniform, and the small polymetallic nodules are not pressed tightly in the annular groove 41 due to insufficient pressure and fall off, are pushed backward by the water flow resistance, and leak out from the grid gap 21 below the corrugated roller 4.

[0062] Of course, when the conveying roller 3 pushes the polymetallic nodules through the elastic sheet 31, some of the relatively small polymetallic nodules are difficult to be moved to the conveying roller 3 and the corrugated roller 4, and the blockage occurs. Based on this, the following preferred embodiment is provided.

[0063] As shown in Figures 2-5 , the shovel strip 22 is bent upward between the conveying roller 3 and the corrugated roller 4 to form a guide section 24, and the guide section 24 is used for upwardly guiding the polymetallic nodules on the grid gap 21.

[0064] In the embodiment, the shovel strip 22 is bent upward to form the guide section 24 between the conveying roller 3 and the corrugated roller 4, and when the elastic sheet 31 of the conveying roller 3 rotates, the elastic sheet 31 pushes the polymetallic nodules to be upwardly conveyed along the guide section 24 of the shovel strip 22, so that the polymetallic nodules are close to the annular groove 41, and the elastic sheet 31 extrudes the polymetallic nodules into the annular groove 41.

[0065] Furthermore, when the shovel bar 22 forms the grid gap 21 to guide polymetallic nodules, it easily carries sediment and silt. Although the grid gap 21 can remove sediment and silt, the effective guiding portion of the shovel bar 22 above the ground is relatively short, and the silt removal rate may be insufficient. Therefore, the following preferred embodiment is provided.

[0066] like Figures 2-5 As shown, the shovel bar 22 has a cylindrical structure, and multiple guide grooves 23 are provided on both sides of the shovel bar 22. The guide grooves 23 are inclined from top to bottom with the upper end facing the forward direction and the lower end facing the opposite direction of forward movement. The multiple guide grooves 23 are distributed along the front end of the shovel bar 22 to the guide section 24.

[0067] In this embodiment, the cylindrical shovel bar 22 can effectively reduce the resistance to forward movement, and the surface of the shovel bar 22 is arc-shaped, which makes it easier to guide the sediment and silt to flow down. Furthermore, guide grooves 23 are added on both sides of the shovel bar 22, so that when the shovel bar 22 moves forward in the sediment and silt, multiple empty areas are formed at the contact interface between the sediment and silt and the surface of the shovel bar 22, which is more conducive to the sediment and silt flowing down from the guide grooves 23.

[0068] Furthermore, such as Figure 7 As shown, the edge of the guide groove 23 facing the forward direction extends toward the center of the groove to form a guide surface 231, and the edge of the guide groove 23 away from the forward direction extends toward the outside of the groove to form a diffusion surface 232.

[0069] As the shovel bar 22 moves in the forward direction, the guide surface 231 guides the mud and polymetallic nodules to move toward the conveying roller 3, and the guide groove 23 guides the mud to leak down from the diffusion surface 232.

[0070] In this embodiment, the guide surface 231 at the opening of the guide channel 23 can effectively prevent sediment and silt from entering the guide channel 23 when the shovel bar 22 moves forward, ensuring the formation of empty areas, and also reducing the influence of the guide channel 23 on the movement resistance.

[0071] Furthermore, the diffusion surface 232 of the guide channel 23 effectively increases the distribution width of the channel opening, which is more conducive to the discharge of sediment and silt along the diffusion surface 232.

[0072] Of course, in actual use, larger polymetallic nodules may still get stuck between the conveyor roller 3 and the grid gap 21. Based on this, the following preferred embodiments are provided.

[0073] like Figure 6 As shown, multiple roller grooves 32 are provided on the surface of the conveying roller 3. The ends of the spring pieces 31 are installed inside the roller grooves 32, and the roller grooves 32 are aligned with the grid gaps 21 to form a conveying channel.

[0074] The spring piece 31 has an arc-shaped structure and is configured to be able to be compressed radially along the conveying roller 3 and to be fully compressed into the roller groove 32.

[0075] Furthermore, as the spring 31 rotates around the conveying roller 3, the spring 31 periodically passes through the conveying channel from front to back, thus pushing the multi-metal nodules on the grid gap 21.

[0076] In this embodiment, the surface of the conveying roller 3 is provided with a roller groove 32 that can accommodate the spring piece 31, and the spring piece 31 can be pressed radially inward and completely pressed into the roller groove 32, thereby expanding the effective passing diameter of the conveying channel and improving the passing performance of large-particle polymetallic nodules.

[0077] Specifically, when the arc-shaped spring piece 31 is rotated by the conveying roller 3, it first inserts into the grid gap 21 and pushes the multi-metal nodules on the grid gap 21 from front to back, and then pushes the multi-metal nodules along the shovel bar 22. When the multi-metal nodules are conveyed to the annular groove 41 or through the conveying channel, the spring piece 31 is squeezed by the multi-metal nodules and compressed into the roller groove 32, thereby facilitating the passage of larger multi-metal nodules.

[0078] In addition, such as Figure 4 As shown, the axial width of the annular groove 41 is set to gradually decrease radially inward, and a rubber ring 42 is provided in the annular groove 41. The rubber ring 42 is configured to be able to compress against the inner wall of the annular groove 41.

[0079] In this embodiment, the annular groove 41 adopts a clamping width that varies with depth, thereby compressing multi-metal nodules of various sizes. It can also effectively collect crushed multi-metal nodules, reducing waste in the collection of multi-metal nodules.

[0080] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A deep sea nodule collection device, characterised in that, The invention relates to a deep-sea polymetallic nodule collecting device, comprising: a grid cabin (1), a grid shovel (2) lower than the feeding port (11) of the grid cabin (1) is arranged on the front direction side of the grid cabin (1), a conveying roller (3) is arranged between the grid shovel (2) and the feeding port (11), and a corrugated roller (4) is arranged between the conveying roller (3) and the feeding port (11), the grid shovel (2), the conveying roller (3) and the corrugated roller (4) together constitute a continuous conveying structure for collecting polymetallic nodules to the feeding port (11); a plurality of elastic sheets (31) are arranged around the peripheral wall of the conveying roller (3), the plurality of elastic sheets (31) are equidistantly arranged along the axial direction of the conveying roller (3), and a plurality of annular grooves (41) of the corrugated roller (4) are arranged in axial correspondence with the plurality of elastic sheets (31) arranged in the axial direction, a plurality of crowbars (12) are arranged at the lower edge of the feeding port (11), and the plurality of crowbars (12) are arranged in interlaced correspondence with the plurality of annular grooves (41); wherein, when the grid cabin (1) moves in the forward direction, the grid shovel (2) moves forward to shovel the polymetallic nodules on the seabed and guide the polymetallic nodules to move along the grid gap (21) of the grid shovel (2) to the conveying roller (3); and the conveying roller (3) is configured to be able to rotate in the forward direction, when the conveying roller (3) rotates, the elastic sheet (31) can rotate around the conveying roller (3) and periodically pass through the grid gap (21) of the grid shovel (2) and the annular groove (41) of the corrugated roller (4) in sequence, and push the polymetallic nodules along the grid gap (21) into the annular groove (41) and be compressed; the corrugated roller (4) is configured to be able to rotate in the reverse direction of the forward direction, when the corrugated roller (4) rotates, the annular groove (41) rotates and transports the polymetallic nodules to the feeding port (11), and the polymetallic nodules are pried off by the crowbar (12) and rolled into the grid cabin (1) from the feeding port (11).

2. The deep-sea polymetallic nodule collecting device according to claim 1, wherein a support (13) is arranged on the grid cabin (1), the grid shovel (2), the conveying roller (3) and the corrugated roller (4) are arranged at the end of the support (13) facing the forward direction, and the conveying roller (3) is arranged to be able to roll on the ground in the conveying direction; and when the conveying roller (3) rolls on the ground in the forward direction, the elastic sheet (31) rotates periodically in the forward direction and provides a forward thrust by contacting the ground.

3. The deep-sea polymetallic nodule collecting device according to claim 2, wherein the grid shovel (2) comprises a plurality of shovel strips (22), the plurality of shovel strips (22) are equidistantly arranged along the axial direction of the conveying roller (3), and the grid gap (21) is formed between two adjacent shovel strips (22); the shovel strip (22) is bent downward at the bottom of the conveying roller (3), and the shovel strip (22) is arranged to be able to elastically bend at the bent part.

4. The deep-sea polymetallic nodule collecting device according to claim 3, wherein ​ ​ The shovel strip (22) is bent upwards between the conveying roller (3) and the corrugated roller (4) to form a guide section (24) for guiding the multi-metallic nodule on the grid gap (21) upwards.

5. The deep-sea polymetallic nodule collecting device according to claim 4, wherein The shovel strip (22) is in a cylindrical structure, and a plurality of guide grooves (23) are arranged on both sides of the shovel strip (22), the guide grooves (23) are arranged obliquely from top to bottom, the upper end is arranged towards the advancing direction, the lower end is arranged towards the reverse direction of the advancing direction, and a plurality of the guide grooves (23) are distributed along the front end of the shovel strip (22) to the guide section (24).

6. The deep-sea polymetallic nodule collecting device according to claim 5, wherein The edge of the slot of the guide groove (23) towards the advancing direction extends to the center of the slot to form a guide surface (231), and the edge of the slot of the guide groove (23) away from the advancing direction extends to the outside of the slot to form a diffusion surface (232); When the shovel strip (22) moves in the advancing direction, the guide surface (231) guides the silt and the polymetallic nodule to move towards the conveying roller (3), and the guide groove (23) guides the silt to leak from the diffusion surface (232).

7. The deep-sea polymetallic nodule collecting device according to any one of claims 1-6, wherein A plurality of roller grooves (32) are arranged on the surface of the conveying roller (3), the end of the spring sheet (31) is arranged inside the roller groove (32), and the roller groove (32) is aligned with the grid gap (21) one by one to form a conveying channel The spring sheet (31) is in an arc structure, and the spring sheet (31) is arranged to be capable of being compressed in the radial direction of the conveying roller (3) and capable of being completely compressed into the roller groove (32); When the spring sheet (31) rotates around the conveying roller (3), the spring sheet (31) periodically passes through the conveying channel from front to back, forming a pushing force on the polymetallic nodule on the grid gap (21).

8. The deep-sea polymetallic nodule collecting device according to claim 1, wherein A guide plate is arranged between the pry bar (12) and the feed inlet (11), the guide plate is inclined upwards towards the corrugated roller (4), the edge of the guide plate is close to the surface of the corrugated roller (4), and the end of the pry bar (12) extends into the annular groove (41) and is close to the groove wall.

9. The deep-sea polymetallic nodule collecting device according to claim 1, wherein The axial width of the annular groove (41) is arranged to gradually decrease radially inward, and a rubber ring (42) is arranged in the annular groove (41), and the rubber ring (42) is arranged to be capable of being compressed towards the inner wall of the annular groove (41).

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