A multi-tubular cable support system suitable for deep sea mining

Abstract

This invention discloses a multi-pipeline support system suitable for deep-sea mining, relating to the field of marine resource development equipment technology. It includes a mooring assembly and a mid-water buoy mounted on the mooring assembly. A mining riser is mounted on the top of the mid-water buoy. The mooring assembly includes a mooring cable and a gravity anchor mounted at the bottom of the mooring cable. The mid-water buoy includes a symmetrically arranged orthogonal grid reinforcement frame. A pipeline support plate is mounted on top of the orthogonal grid reinforcement frame. Capsule-shaped buoy units are symmetrically arranged within the space formed by the orthogonal grid reinforcement frame and the pipeline support plate. The mooring cable is connected to the orthogonal grid reinforcement frame, and the mining riser is erected on the pipeline support plate. By integrating the mid-water buoy, the symmetrical mooring assembly, and the modular double-arm linkage structure, the system effectively suppresses the dynamic response of the riser during deep-sea mining operations, prevents spatial interference between the riser and the cable, and significantly improves system stability, operational safety, and mineral transport efficiency.

Description

Technical Field

[0001] This invention relates to the field of marine resource development equipment technology, and in particular to a multi-tube cable support system suitable for deep-sea mining. Background Technology

[0002] In deep-sea mining systems, risers serve as the key channel for transporting mineral resources from the seabed to the surface, and are the core hub of the entire system.

[0003] In existing technologies, a design scheme of arranging buoyancy blocks is generally adopted to optimize the riser configuration. However, this traditional arrangement method has significant defects in actual dynamic operations: since the buoyancy blocks are usually discretely distributed and the rigid or flexible connection with the riser is relatively simple, the riser is prone to large swings and torsional deformations under complex ocean currents and waves, which can cause spatial interference with adjacent mining vehicle power supply cables, control cables and other auxiliary pipelines, or even cause hard collisions.

[0004] Such interference and collisions can not only directly damage the structural integrity of risers and cables, causing mineral transport interruptions and increased equipment maintenance costs, but also affect signal transmission and power supply stability due to problems such as cable entanglement and friction wear, severely restricting the continuous operation efficiency and safety of mining systems.

[0005] Therefore, a multi-tube cable support system suitable for deep-sea mining is provided to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-pipe cable support system suitable for deep-sea mining, which suppresses interference and collision between flexible risers and cables under dynamic operation during deep-sea mining, thereby improving the stability, safety and continuity of system operation.

[0007] To achieve the above objectives, the present invention provides a multi-pipeline support system suitable for deep-sea mining, including a mooring assembly and a mid-water buoy mounted on the mooring assembly. A mining riser is mounted on the top of the mid-water buoy. The mooring assembly includes a mooring cable and a gravity anchor mounted on the bottom of the mooring cable. The mid-water buoy includes a symmetrically arranged orthogonal grid reinforcement frame. A pipeline support plate is mounted on the top of the orthogonal grid reinforcement frame. Capsule-shaped buoy units are symmetrically arranged within the space formed by the orthogonal grid reinforcement frame and the pipeline support plate. The mooring cable is connected to the orthogonal grid reinforcement frame, and the mining riser is erected on the pipeline support plate.

[0008] Preferably, each of the four corners of the orthogonal grid reinforced frame is provided with a lifting lug, and there are four mooring cables and four gravity anchors. The four mooring cables are fixedly connected to the four lifting lugs respectively. The gravity anchor includes multiple layers of cast iron plates and two sets of oblique prism shear keys symmetrically arranged at the bottom of the multiple layers of cast iron plates. Each set of oblique prism shear keys has four keys.

[0009] Preferably, the mining riser includes a rigid mining riser and a flexible mining riser connected to the rigid mining riser. The rigid mining riser and the flexible mining riser are connected by an intermediate compartment. A mining car is installed at the other end of the flexible mining riser. Cables are installed on both sides of the rigid mining riser and the flexible mining riser. The cables are connected to the mining car. The rigid mining riser and the cables, as well as the flexible mining riser and the cables, are fixedly connected by multiple double-arm connecting rods.

[0010] Preferably, the top of the cable support plate is provided with three channels, and a limiting skirt is provided between adjacent channels. The flexible mining riser is located between two limiting skirts, and two cables are respectively located on the side of the two limiting skirts away from the flexible mining riser. The distance between the two cables is the same as the length of the double-arm connecting rod. The flexible mining riser and the cables are both perpendicular to the double-arm connecting rod, and the outer edge line of the orthogonal grid reinforcement frame is parallel to the double-arm connecting rod.

[0011] Preferably, the distance between the cable support plate and the intermediate compartment, and between adjacent double-arm connecting rods. Specifically set as follows: ; in, This indicates the length of the flexible mining riser between the cable support plate and the intermediate compartment. This represents the curve length of the flexible mining riser between the cable support plate and the intermediate compartment, with the cable support plate as the origin. The distance between the cable support plate and the mining car, and between adjacent double-arm connecting rods. Specifically set as follows: ; in, This indicates the length of the flexible mining riser between the cable support plate and the mining vehicle. This represents the curve length of the flexible mining riser between the cable support plate and the mining vehicle, with the cable support plate as the origin.

[0012] Preferably, the total length of the rigid mining riser and the flexible mining riser is Cable support plate No double-arm linkage is installed within the range, and the mining vehicle's... No double-arm linkages are installed within the range.

[0013] Preferably, the double-arm linkage includes two connecting arms and two collars. The connecting arm includes a connecting rod and a large-diameter semi-annular joint and a small-diameter semi-annular joint respectively disposed at both ends of the connecting rod. The collar is configured as a semi-annular structure that matches the small-diameter semi-annular joint. Bolt holes for connecting bolts and nuts are provided at both ends of the large-diameter semi-annular joint, the small-diameter semi-annular joint, and the semi-annular structure. The two large-diameter semi-annular joints and the small-diameter semi-annular joint and the semi-annular structure are fixedly connected by bolts and nuts.

[0014] Preferably, the rigid or flexible mining riser passes between two large-diameter semi-circular joints, and the cable passes between the small-diameter semi-circular joint and the semi-circular structure. The inner walls of the large-diameter semi-circular joint, the small-diameter semi-circular joint, and the semi-circular structure are all provided with semi-circular anti-slip pads.

[0015] Therefore, the present invention employs the above-mentioned multi-tube cable support system suitable for deep-sea mining, which has the following beneficial effects: (1) This scheme optimizes the configuration of flexible mining riser by using a medium-water pontoon, which reduces the dynamic response of the riser. The large net buoyancy provided by the medium-water pontoon can improve the stability of the riser operation and improve the mineral transport efficiency to a certain extent. (2) This scheme adopts a structure that combines a medium-water float and a double-arm connecting rod, which can simultaneously support the riser and the cable, preventing interference or even collision between the riser and the cable; (3) By setting up symmetrically distributed mooring cables, this scheme significantly reduces the motion amplitude of the medium-water buoy, improves the stability of the medium-water buoy, and thus improves the safety of riser operation; (4) The double-arm connecting rod of this solution adopts a modular segmented structure. Through standardized interface design, it can achieve mass production while ensuring assembly accuracy, and provides an engineering technology solution for commercial application.

[0016] The method of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a multi-tube cable support system suitable for deep-sea mining according to the present invention; Figure 2 This is a connection diagram of the mooring assembly and the mid-water buoy of the present invention; Figure 3 This is a structural diagram of the gravity anchor of the present invention; Figure 4 This is a structural diagram of the water pontoon in this invention; Figure 5 This is a connection diagram of the double-arm connecting rod and the mining riser of the present invention; Figure 6 This is a structural diagram of the double-arm connecting rod of the present invention; Figure 7 This is an exploded view of the double-arm connecting rod of the present invention.

[0018] The components include: 1. Mooring assembly; 101. Mooring cable; 102. Gravity anchor; 112. Multi-layer cast iron plate; 122. Oblique prism shear key; 2. Medium-water buoy; 201. Orthogonal grid reinforced frame; 202. Cable support plate; 203. Capsule-type buoy unit; 204. Limiting skirt; 205. Channel; 3. Mining riser; 301. Rigid mining riser; 302. Flexible mining riser; 303. Cable; 4. Intermediate compartment; 5. Mining car; 6. Double arm connecting rod; 601. Connecting arm; 611. Connecting rod; 621. Large-diameter semi-circular joint; 631. Small-diameter semi-circular joint; 602. Collar; 603. Semi-circular anti-slip pad; 604. Bolt hole; 7. Bolt; 8. Nut; 9. Lifting lug. Detailed Implementation

[0019] The method of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Unless otherwise defined, the methodological or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0021] The terms "comprising" or "including" as used in this invention mean that the element preceding the term encompasses the element listed after the term, and do not exclude the possibility of encompassing other elements. Terms such as "inner," "outer," "upper," and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In this invention, unless otherwise explicitly specified and limited, the term "attached" and similar terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements or the interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] Example like Figures 1-7 As shown, the present invention provides a multi-tube cable support system suitable for deep-sea mining, including a mooring assembly 1 and a mid-water buoy 2 disposed on the mooring assembly 1. The mooring assembly 1 is used for positioning the mid-water buoy 2, and the mid-water buoy 2 is used for supporting the flexible mining riser 302 and the cable 303.

[0023] The top of the buoy 2 is equipped with a mining riser 3. The mooring assembly 1 includes a mooring cable 101 and a gravity anchor 102 set at the bottom of the mooring cable 101. The buoy 2 includes a symmetrically arranged orthogonal grid reinforcement frame 201. The orthogonal grid reinforcement frame 201 can provide sufficient strength to ensure the safe operation of the flexible mining riser 302.

[0024] A cable support plate 202 is installed on the top of the orthogonal grid reinforced frame 201. Capsule-shaped float units 203 are symmetrically arranged in the space formed by the orthogonal grid reinforced frame 201 and the cable support plate 202. The mooring cable 101 is connected to the orthogonal grid reinforced frame 201. The mining riser 3 is erected on the cable support plate 202.

[0025] The capsule-shaped pontoon unit 203 has a large drainage volume, which can provide sufficient net buoyancy to ensure the structural integrity of the flexible mining riser 302 within the operating range of the mining vehicle 5.

[0026] The orthogonal grid reinforced frame 201 is equipped with lifting lugs 9 at each of its four corners. There are four mooring cables 101 and four gravity anchors 102. The four mooring cables 101 are fixedly connected to the four lifting lugs 9 respectively. The mooring cables 101 have a large pretension, which can provide a large restoring force and suppress the movement of the middle-water buoy 2, further ensuring the operational safety of the flexible mining riser 302. The gravity anchor 102 includes a multi-layer cast iron plate 112 and two sets of oblique prism shear keys 122 symmetrically arranged at the bottom of the multi-layer cast iron plate 112. There are four oblique prism shear keys 122 in each set. The multi-layer cast iron plate 112 has sufficient weight to meet the anchoring requirements of the mooring system. The oblique prism shear keys 122 can prevent the gravity anchor from drifting.

[0027] The mining riser 3 includes a rigid mining riser 301 and a flexible mining riser 302 connected to the rigid mining riser 301. The rigid mining riser 301 and the flexible mining riser 302 are connected by an intermediate compartment 4. A mining car 5 is installed at the other end of the flexible mining riser 302. Cables 303 are installed on both sides of the rigid mining riser 301 and the flexible mining riser 302. The cables 303 are connected to the mining car 5 to supply power to the mining car 5. The rigid mining riser 301 and the cables 303, as well as the flexible mining riser 302 and the cables 303, are fixedly connected by multiple double-arm connecting rods 6. The double-arm connecting rods 6 can prevent interference or even collision between the flexible mining riser 302 and the cables 303.

[0028] The top of the cable support plate 202 is provided with three channels 205, and a limiting skirt 204 is provided between adjacent channels 205. The cable support plate 202 has a concave bearing surface with a continuous curvature transition and integrates three channels 205 for passing through the flexible mining riser 302 and two cables 303. The cable support plate 202 achieves a steep wave or gentle wave riser configuration by supporting the flexible mining riser 302, reducing riser tension and bending moment, and improving operational stability. The limiting skirt 204 can prevent interference or even collision between the flexible mining riser 302 and the cable 303.

[0029] The flexible mining riser 302 is set between two limiting skirts 204, and two cables 303 are respectively set on the side of the two limiting skirts 204 away from the flexible mining riser 302. The distance between the two cables 303 is the same as the length of the double-arm connecting rod 6. The flexible mining riser 302 and the cables 303 are both perpendicular to the double-arm connecting rod 6. The outer edge line of the orthogonal grid reinforcement frame 201 is parallel to the double-arm connecting rod 6.

[0030] The double-arm connecting rod 6 includes two connecting arms 601 and two collars 602. The connecting arm 601 includes a connecting rod 611 and a large-diameter semi-annular joint 621 and a small-diameter semi-annular joint 631 respectively disposed at both ends of the connecting rod 611. The collar 602 is configured as a semi-annular structure that matches the small-diameter semi-annular joint 631. Both ends of the large-diameter semi-annular joint 621, the small-diameter semi-annular joint 631 and the semi-annular structure are provided with bolt holes 604 for connecting bolts 7 and nuts 8. The two large-diameter semi-annular joints 621 are fixedly connected to each other and the small-diameter semi-annular joint 631 is fixedly connected to the semi-annular structure by bolts 7 and nuts 8.

[0031] The rigid mining riser 301 or the flexible mining riser 302 passes between two large-diameter semi-annular joints 621, and the cable 303 passes between the small-diameter semi-annular joint 631 and the semi-annular structure. The inner walls of the large-diameter semi-annular joint 621, the small-diameter semi-annular joint 631 and the semi-annular structure are all provided with semi-annular anti-slip pads 603 to ensure that there is no relative sliding between the double-arm connecting rod 6 and the rigid mining riser 301, the flexible mining riser 302 and the cable 303.

[0032] The connecting arm 601, collar 602, and semi-circular anti-slip pad 603 are all at the same height, which facilitates manufacturing and installation.

[0033] The distance between the cable support plate 202 and the intermediate compartment 4, and between adjacent double-arm connecting rods 6 Specifically set as follows: ; in, In this embodiment, the length of the flexible mining riser 302 between the cable support plate 202 and the intermediate compartment 4 is indicated. Take 240m, This indicates the curve length of the flexible mining riser 302 between the cable support plate 202 and the intermediate compartment 4, with the cable support plate 202 as the origin. That is, the distance between the cable support plate 202 and the intermediate compartment 4, and between adjacent double-arm connecting rods 6. Specifically set as follows: ; The distance between the cable support plate 202 and the mining car 5, and between adjacent double-arm connecting rods 6. Specifically set as follows: ; in, In this embodiment, the length of the flexible mining riser 302 between the cable support plate 202 and the mining vehicle 5 is indicated. Take 360m, This represents the curve length of the flexible mining riser 302 between the cable support plate 202 and the mining vehicle 5, with the cable support plate 202 as the origin. That is, the distance between the cable support plate 202 and the mining car 5, and between adjacent double-arm connecting rods 6. Specifically set as follows: .

[0034] The total length of the rigid mining riser 301 and the flexible mining riser 302 is Cable support plate 202 The double-arm linkage 6 is not installed within the range, and the mining vehicle 5 is... In this embodiment, no double-arm connecting rod 6 is installed within the range. Take 600m, that is, within 30m of the cable support plate 202, no double-arm connecting rod 6 is installed, within 20m of the mining car 5, the length of the rigid mining riser 301 is 200m, and a double-arm connecting rod 6 is installed on the rigid mining riser 301 every 40m.

[0035] Therefore, the present invention adopts the above-mentioned multi-tube cable support system suitable for deep-sea mining, which adopts a cooperative structure of mid-water buoys and double-arm connecting rods, symmetrically distributed mooring components, and a double-arm connecting rod layout with adjustable segment spacing. This effectively reduces the dynamic response of the deep-sea mining riser, suppresses interference and collision between the riser and the cable, and significantly improves the overall operational stability and safety of the system.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the method of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the method of the present invention, and these modifications or equivalent substitutions should not cause the modified method to deviate from the spirit and scope of the method of the present invention.

Claims

1. A multi-tubular cable support system suitable for deep sea mining, characterised in that, The system includes a mooring assembly and a medium-water buoy mounted on the mooring assembly. A mining riser is mounted on the top of the medium-water buoy. The mooring assembly includes a mooring cable and a gravity anchor mounted on the bottom of the mooring cable. The medium-water buoy includes a symmetrically arranged orthogonal grid reinforcement frame. A cable support plate is mounted on the top of the orthogonal grid reinforcement frame. Capsule-shaped buoy units are symmetrically arranged within the space formed by the orthogonal grid reinforcement frame and the cable support plate. The mooring cable is connected to the orthogonal grid reinforcement frame. The mining riser is erected on the cable support plate. The orthogonal grid reinforced frame is equipped with lifting lugs at all four corners. There are four mooring cables and four gravity anchors. The four mooring cables are fixedly connected to the four lifting lugs respectively. The gravity anchors include multiple layers of cast iron plates and two sets of oblique prism shear keys symmetrically arranged at the bottom of the multiple layers of cast iron plates. Each set of oblique prism shear keys has four. The mining riser includes a rigid mining riser and a flexible mining riser connected to the rigid mining riser. The rigid mining riser and the flexible mining riser are connected by an intermediate compartment. A mining car is installed at the other end of the flexible mining riser. Cables are installed on both sides of the rigid mining riser and the flexible mining riser. The cables are connected to the mining car. The rigid mining riser and the cable, as well as the flexible mining riser and the cable, are fixedly connected by multiple double-arm connecting rods.

2. The multi-tube cable support system for deep-sea mining according to claim 1, characterized in that, The top of the cable support plate has three channels, and a limiting skirt is set between adjacent channels. The flexible mining riser is set between two limiting skirts. Two cables are set on the side of the two limiting skirts away from the flexible mining riser. The distance between the two cables is the same as the length of the double-arm connecting rod. The flexible mining riser and the cables are perpendicular to the double-arm connecting rod. The outer edge line of the orthogonal grid reinforcement frame is parallel to the double-arm connecting rod.

3. A multi-tubular cable support system suitable for deep sea mining according to claim 2, wherein, The distance between adjacent double-arm links between the umbilical support plate and the intermediate cabin Specifically configured as: ； wherein, Lflex represents the length of the flexible mining riser between the umbilical support plate and the intermediate tank, Lflex represents the length of the flexible mining riser between the umbilical support plate and the intermediate tank, The distance between adjacent double-arm links between the umbilical support plate and the mining vehicle Specifically configured as: ； wherein, Lflex represents the length of the flexible mining riser between the umbilical support plate and the mining vehicle, Lflex represents the length of the flexible mining riser between the umbilical support plate and the mining vehicle, 4. A multi-tubular cable support system suitable for deep sea mining according to claim 3, wherein, The total length of the rigid mining riser and the flexible mining riser is The double-arm link is not arranged in the range of The double-arm link is not arranged in the range of The double-arm link is not arranged in the range of 5. A multi-tubular cable support system suitable for deep sea mining according to claim 1, wherein, The double-arm linkage includes two connecting arms and two collars. The connecting arm includes a connecting rod and a large-diameter semi-annular joint and a small-diameter semi-annular joint respectively located at both ends of the connecting rod. The collar is set as a semi-annular structure that matches the small-diameter semi-annular joint. Bolt holes for connecting bolts and nuts are provided at both ends of the large-diameter semi-annular joint, the small-diameter semi-annular joint and the semi-annular structure. The two large-diameter semi-annular joints and the small-diameter semi-annular joint and the semi-annular structure are fixedly connected by bolts and nuts.

6. A multi-tubular cable support system suitable for deep sea mining according to claim 5, wherein, Rigid or flexible mining risers pass between two large-diameter semi-circular joints, while cables pass between small-diameter semi-circular joints and the semi-circular structure. Semi-circular anti-slip pads are provided on the inner walls of the large-diameter semi-circular joints, small-diameter semi-circular joints, and the semi-circular structure.

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