Underwater torque installation device and use method

Abstract

Disclosed in the present invention are an underwater torque installation device and a use method. The installation device comprises a main body, a plurality of propulsion devices for providing propulsive force, and a connecting interface. Each propulsion device is connected to the main body by means of a force arm, and the plurality of propulsion devices are arranged at intervals around the center of the main body; and the connecting interface is arranged on one end of the main body, and is connected to an anchor foundation on which torque is to be applied. The present invention can solve the problems such as construction difficulties in the anchoring process of anchor foundations that require torque installation in underwater environments, especially in deep-water subsea environments, will be not affected by ocean waves and winds, and can avoid the use of hydraulic systems, greatly reducing installation costs.

Description

Underwater torque installation device and use method Technical Field

[0001] The present invention relates to the field of underwater equipment technology, and in particular to the field of submarine anchor foundation construction technology. Aiming at the difficulties in the construction of submarine anchoring projects, especially deep-water submarine anchoring projects, an underwater torque installation device and a method of use are proposed, which are suitable for the underwater installation and construction of anchor-type foundations that require torque installation. Background Art

[0002] With the gradual depletion of land resources and the growth of the global population, the development and utilization of marine resources has become increasingly important. The oceans are rich in energy, minerals, and fishery resources, which are crucial for a country's economic development and energy supply. my country has formulated a strategy to build a strong maritime nation, aiming to actively promote the development of the marine economy, strengthen the development and protection of marine resources, and enhance my country's overall strength in the maritime sector.

[0003] The marine working environment is quite special. How to ensure the stability of the platform structure (such as deep-sea oil development platforms, offshore wind power and other renewable resource development platforms) is the key to the platform structure design. This undoubtedly places higher demands on the foundation anchoring system of the marine platform. Whether the marine platform can start service depends first on the installation of the seabed anchoring foundation. Therefore, it is particularly important to explore new seabed anchoring foundation structures and solve the difficulties in seabed construction. [1] .

[0004] The spiral anchor foundation is one of the new anchor foundation types in marine engineering. It is generally composed of an anchor rod and one or more spiral blades welded to the anchor rod. Compared with other anchor foundations such as pile anchors, drag anchors and plate anchors, the spiral anchor foundation has attracted widespread attention from academia and industry due to its advantages such as low cost, high pull-out bearing capacity and low noise during installation. Therefore, it is considered one of the most promising foundation types in marine engineering. [2-4] . Different from other marine foundations such as traditional pipe piles and caissons, spiral anchors need to apply "rotation" (torque) force for installation. Spiral anchor foundations onshore and offshore generally provide torque through a hydraulic torque motor or a force arm extending from the top of the anchor rod to apply thrust (such as a ship, etc.). However, due to the limitations of underwater torque application technology, especially the large torque application technology for large-sized spiral anchors in marine engineering, spiral anchors have not been widely used in marine engineering. As many scholars have said [1-3,5] , it is necessary to develop suitable torque installation equipment for larger offshore screw piles and similar anchor foundations that require torque installation.

[0005] [1]Cerfontaine B,White D,Kwa K,et al.Anchor geotechnics for floating offshore wind:Current technologies and future innovations[J].Ocean Engineering,2023,279:114327.

[0006] [2]Cerfontaine B,Knappett J A,Brown M J,et al.Effect of soil deformability on the failure mechanism of shallow plate or screw anchors in sand[J].Computers and Geotechnics,2019,109:34-45.

[0007] [3]Davidson C,Brown M J,Cerfontaine B,et al.Physical modelling to demonstrate the feasibility of screw piles for offshore jacket-supported wind energy structures[J].Géotechnique,2022,72(2):108-126.

[0008] [4]Sharif Y U,Brown M J,Cerfontaine B,et al.Effects of screw pile installation on installation requirements and in-service performance using the discrete element method[J].Canadian geotechnical journal,2021,58(9):1334-1350.

[0009] [5]Spagnoli G, de Hollanda Cavalcanti Tsuha CA review on the behavior of helical piles as a potential offshore foundation system[J]. Marine Georesources&Geotechnology, 2020, 38(9):1013-1036.

[0010] Summary of the Invention

[0011] With the increasing number of offshore platforms, especially deep-sea floating platforms, the demand for submarine anchoring technology is increasing. It is particularly important to explore new types of submarine anchor foundations and solve the problems of submarine construction of new types of foundations. This invention provides an underwater torque installation device and method for use to solve the problem of underwater installation difficulties of torque-installed anchor foundations (such as screw anchor foundations) in submarine engineering.

[0012] In order to achieve the purpose of the present invention, the present invention provides an underwater torque installation device, including a main body, a propulsion device for providing thrust, and a connection interface.

[0013] A plurality of propulsion devices for providing thrust are connected to the main body through a lever arm, and the plurality of propulsion devices are arranged at intervals around the center of the main body;

[0014] The connection interface is provided at one end of the main body and is used for connecting with an anchor-type foundation to which a torque is to be applied.

[0015] The utility model also comprises a wire detwister, which is arranged on the main body and the wires connected to the propulsion device are connected to the wire detwister. As the propulsion device rotates, the detwister can prevent the wires on the upper part from twisting together.

[0016] Furthermore, the main body is cylindrical, and this part integrates a wire detwister and wires. The wires are connected to a power supply device on the sea surface through the detwister to supply power to the propulsion device.

[0017] Furthermore, the connection interface is used to ensure that the main body of the device is connected to the anchor type of the torque to be applied, thereby ensuring the application of the torque.

[0018] Furthermore, the propulsion device can adopt underwater propulsion devices such as propeller propulsion, water jet propulsion, pump jet propulsion, and vector propulsion device.

[0019] Furthermore, there is no restriction on the arrangement of the propulsion devices, and they can be arranged in a single layer, multiple layers along the center, or multiple layers.

[0020] Furthermore, the torque installation equipment adopts modular installation, and different configurations of installation equipment are selected according to different working conditions, taking into account the type, number and lever arm size of the propulsion device and the arrangement of the lever arm.

[0021] Furthermore, the number, size, and length of the propulsion devices are determined as follows:

[0022] Obtain geotechnical physical and mechanical parameters through in-situ testing technology;

[0023] estimating the installation torque required for the screw anchor installation based on the geotechnical physical and mechanical parameters;

[0024] The number of propulsion devices and the length of the lever arm in the designed installation device are determined based on the installation torque required for installation.

[0025] A method for using an underwater torque installation device comprises the following steps:

[0026] The anchor foundation and installation bracket are hoisted and launched into the water, wherein the installation bracket is first dropped to the bottom of the water, and then the anchor foundation is hoisted through the installation bracket and touches the bottom of the water. After it stabilizes, the hoisting is removed;

[0027] Hoisting the installation device, connecting the installation device to the interface on the anchor foundation through the connection interface, and removing the hoisting after it is stable;

[0028] The propulsion device of the installation device works to drive the main body forward to drive the anchor foundation into the underwater soil layer.

[0029] Furthermore, after the vessel is fixed to the target location as an operating platform, the lifting operation can be started.

[0030] Furthermore, after the anchor foundation is driven into the underwater soil layer, the installation device and the installation bracket are lifted off.

[0031] Compared with the prior art, the present invention can at least achieve the following beneficial effects:

[0032] (1) The present invention achieves high-torque installation by extending the lever arm of the propulsion device. The "lightweight" installation equipment can meet the high-torque installation requirements in marine engineering and does not require large hydraulic equipment and pile-driving ships. In addition, underwater installation is not affected by weather and sea waves, which reduces installation costs, reduces installation time, and improves work efficiency.

[0033] (2) The present invention provides a novel underwater torque installation device, which will promote the application of anchor foundations such as screw anchors that require torque installation. The application of more novel anchor foundations will accelerate the development and utilization of marine resources, including subsea oil and gas extraction, offshore wind power generation, and offshore wave and tidal power generation.

[0034] (3) The present invention can adopt a modular design and select installation equipment with different configurations according to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic structural diagram of an underwater torque installation device provided by an embodiment of the present invention (single-layer arrangement, with all propulsion devices located at the same height).

[0036] FIG2 is a schematic structural diagram of an underwater torque installation device provided by an embodiment of the present invention (double-layer arrangement, with all propulsion devices located at different heights).

[0037] FIG3 is a front view ((a)) and a top view ((b)) of a mounting device with two lever arms (propellers) provided by an embodiment of the present invention.

[0038] FIG4 is a front view ((a)) and a top view ((b)) of a mounting device with three lever arms (propellers) provided by an embodiment of the present invention.

[0039] FIG5 is a front view ((a)) and a top view ((b)) of a mounting device with four lever arms (propellers) provided in an embodiment of the present invention.

[0040] FIG6 is a schematic cross-sectional view of the installation device provided by an embodiment of the present invention.

[0041] FIG7 is a schematic diagram of the installation process of the spiral anchor in an embodiment of the present invention.

[0042] FIG8 is a schematic diagram of a mounting device model according to an embodiment of the present invention.

[0043] Figure 9 is a schematic diagram of a spiral anchor.

[0044] FIG10 is a schematic diagram of a device during testing according to an embodiment of the present invention.

[0045] In the figure: 1 is the detwister, 2 is the main body, 3 is the connection interface, 4 is the propulsion device, 5 is the extension arm, 6 is the wires connecting the propeller motor and the detwister, 7 is the spiral anchor, 8 is the mounting bracket, 9 is the winch on the ship (or other lifting device), and 10 is the cable. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Example 1

[0048] Please refer to Figures 1 and 4. This embodiment provides an underwater torque installation device for completing the installation of a spiral anchor underwater. The installation device includes a cylindrical main body 2, three force arms 5, three propulsion devices 4 and a set of wire detwisters 1, connection interfaces 3 and wires 6. The middle part of the installation device is the main body 2, which integrates the wire detwister 1 and the wires 6. The wires 6 are connected to the power supply device on the sea surface through the wire detwister 1; wherein, each wire connected to the propulsion device 4 is connected to the wire detwister 1, and as the installation device rotates, the wire detwister 1 can prevent the upper wires from twisting together. A connection interface 3 for connecting a spiral anchor is provided at the lower part of the main body 2. In other embodiments, the number of force arms 5 and propulsion devices 4 is not limited to 3.

[0049] Among them, each lever 5 can be set as a whole, or a lever arm can be formed by splicing multiple lever arm units, so as to facilitate transportation and modularization. The number of sections of the lever arm unit can be determined according to the required installation torque.

[0050] In this embodiment, the number of the propulsion devices 4 and the force arms 5 is equal, the three force arms 5 are circumferentially spaced apart and arranged on the main body 2 , and the three propulsion devices 4 are respectively arranged at the ends of the three force arms 5 .

[0051] In this embodiment, three force arms 5 are circumferentially arranged at equal intervals on the main body 2 .

[0052] In this embodiment, the connection between the propulsion device 4 and the lever arm 5 is waterproofed.

[0053] Multiple mounting holes are circumferentially formed on one side of the lever arm 5, near the main body 2. The lever arm 5 is secured to the main body 2 via bolts and the mounting holes. The use of different mounting holes allows for adjustment of the angle of the propulsion device 4 mounted on the lever arm 5 relative to the horizontal plane, thereby decomposing the thrust of the propulsion device 4 into a vertical installation force and an installation torque.

[0054] This embodiment uses a propeller as the propulsion device 4. It is understandable that in other embodiments, other types of propulsion devices may also be used, such as a water jet propulsion device, a pump jet propulsion device, or a vector propulsion device.

[0055] In this embodiment, the lower portion of the main body 2 is detachably connected to the connection interface 3, so that anchor joints of different sizes can be connected by replacing the connection interface 3 with different interface sizes, thereby improving the applicability of the device. It is understood that in other embodiments, the main body 2 and the connection interface 3 can also be directly fixedly connected.

[0056] The installation device provided in this embodiment is used to install spiral anchors. It can be understood that the installation device provided by the present invention provides torque to drive the anchor foundation requiring torque installation into the underwater soil layer. In addition to being used to install spiral anchors, it can also be used to install other anchor foundations requiring torque installation.

[0057] For the implementation of this plan, the main steps include launching and hoisting, speed-changing propulsion, lifting off the propulsion device, and lifting off the bracket. The construction drawing is shown in Figure 7.

[0058] In the first step of launching and hoisting, the vessel is first fixed to the target position using positioning and anchoring. As an operating platform, a winch 9 or other hoisting equipment is used to control the spiral anchor 7 and the mounting bracket 8 to be vertically launched into the water. The mounting bracket 8 is a tower-type fixed bracket. The anchor rod of the spiral anchor 7 can be passed through the mounting bracket 8 for fixation. Ensure that the mounting bracket 8 first falls to the bottom of the water. After it stabilizes, the spiral anchor 7 is hoisted vertically through the mounting bracket 8 and contacts the bottom of the water. After it stabilizes, the hoisting is released. After that, the installation device of this embodiment is hoisted. Before launching, the arm length of the force arm 5 of the installation device and the angle of the propulsion device 4 relative to the horizontal plane are adjusted. The installation device is vertically hoisted to ensure that the connection interface 3 is connected to the reserved interface on the anchor rod of the spiral anchor 7. After it stabilizes, the hoisting is removed.

[0059] In the second step of speed change, the motor is controlled on the operating platform to advance slowly at first to prevent the mounting device from rotating too high, which may cause a large reaction force and unstable support. The rod head of the spiral anchor 7 and the front end of the anchor plate are driven in first. After the anchor plate is fully driven in, the motor is controlled to accelerate and the remaining part is driven in. When the spiral anchor 7 is completely driven in, the propulsion device 4 is stopped.

[0060] In the third step of lifting, the crane is operated first to lift the installation device and then connect the installation bracket 8. At this time, the spiral anchor 7 has been driven into the underwater soil layer. The installation bracket 8 can be lifted off to separate the spiral anchor 7 and the installation bracket 8. After the installation bracket 8 is lifted off, a new spiral anchor is assembled for the next installation.

[0061] Example 2

[0062] It is basically the same as the embodiment 1, except that: referring to FIG. 3 , in this embodiment, two lever arms 5 are provided on the main body, and a propulsion device 4 is provided on each of the two lever arms 5 .

[0063] In this embodiment, the two force arms 5 are symmetrically arranged on the main body 2 .

[0064] Example 3

[0065] It is basically the same as Example 1, except that: referring to FIG. 5 , in this embodiment, four lever arms 5 are provided on the main body 2 , each of the four lever arms 5 is provided with a propulsion device 4 , and the intervals between the four lever arms 5 are equal.

[0066] Example 4

[0067] It is basically the same as Example 1, except that: referring to FIG. 2 , in this embodiment, a double row of lever arms 5 are provided on the main body 2 , and each lever arm 5 is provided with a propulsion device 4 .

[0068] Example 5

[0069] In order to further verify the feasibility of the invented device, this embodiment carries out an indoor physical model test, in which the propulsion device is a propeller and the object to be installed is a spiral anchor.

[0070] First, the mounting device model and the spiral anchor model were fabricated (see Figure 8). The mounting device model includes three lever arms, three propellers, a battery compartment, a connection port, and wiring equipment. The mounting device model has a 1:25 scale ratio to the ideal prototype, with a lever arm of 20 cm and a propeller diameter of 6 cm. The propellers are battery-powered, with a maximum forward thrust of 10 N per propeller at 24 V and 3 A. The mounting device model is controlled via radio remote control technology, transmitting radio signals to the surface via wires and a float (such as the sphere in Figure 8) to address the difficulty of underwater radio signal propagation. The spiral anchor model has a 1:25 scale ratio to the prototype used in marine engineering. The anchor rod diameter is 2 cm, the anchor disc diameter is 6 cm (i.e., the anchor disc diameter is three times the anchor rod diameter), and the anchor rod length is 60 cm.

[0071] Next, to simulate an underwater installation environment, the model barrel had a diameter of 1.8m and a height of 1.6m. The seabed was simulated using river sand, which was layered and leveled, each 10cm thick, until the seabed reached a depth of 60cm. Water was then slowly added to the barrel to prevent localized scouring and other issues. The sand density (ρ) was measured to be 1.53g / cm 3 , the relative density of sand (D r ) is 0.54.

[0072] Finally, the underwater camera and tower-type fixing bracket are arranged, and the screw anchor model and the installation device model are placed, as shown in Figure 10. Then, the thrust of the propulsion device 4 is gradually increased through the remote control, and the screw anchor 7 is penetrated to the designed depth (for example, the penetration depth is designed to be 40 cm) through the installation device.

[0073] In summary, the installation device realizes automatic underwater installation of spiral anchors.

[0074] Example 6

[0075] Different types of propulsion systems have their own advantages, and the specific choice should depend on the underwater construction environment and the torque requirements for screw anchor installation. Optional propulsion systems include propeller propulsion systems, water jet propulsion systems, pump-jet propulsion systems, and vector propulsion systems. Propeller propulsion systems are simple in design, cost-effective, and can provide high thrust at low speeds, but water jet propulsion systems have greater advantages in maneuverability. Pump-jet propulsion systems and vector propulsion systems are more complex in structure than the former two, and both are more maneuverable. Vector propulsion systems, in particular, can change the direction of the propulsion system's nozzle and the amount of propulsion, but this also increases cost and maintenance.

[0076] This example uses the most common propeller propulsion device and a helical anchor as an example to provide a method for determining the number and size of propellers and the size of the lever arm. When using other propulsion devices and installing other anchor-type foundations, the following steps can also be used to determine the number of propulsion devices and the size of the lever arm.

[0077] Step 1: Obtain geotechnical and mechanical parameters through in-situ testing technology;

[0078] Step 2: Estimate the installation torque required for screw anchor installation based on the geotechnical physical and mechanical parameters obtained by in-situ testing technology;

[0079] Step 3: Design the mounting device based on the installation torque required for installation, and determine the number and size of propellers in the mounting device and the size of the lever arm.

[0080] The number of propellers in one layer should not exceed four. If there are a large number of propellers, a multi-layer arrangement can be selected.

[0081] The relevant calculation instructions are divided into three parts: the pull-out bearing capacity of the spiral anchor, the installation torque required by the spiral anchor, and the installation torque that the installation device can provide. It explains the advantages (high bearing capacity, low cost, etc.) and feasibility of the application of spiral anchor foundations in marine engineering.

[0082] (1) Pull-out bearing capacity of spiral anchor

[0083] The pull-out bearing capacity of a spiral anchor in clay is: Q u =ΣA h (s u N u +γH i )+πdH eff αs u (1)

[0084] Where Q u A is the ultimate pull-out bearing capacity of the spiral anchor; h is the anchor plate area; s u is the shear strength of clay; N uis the pull-out bearing capacity coefficient; γ is the soil bulk density; H i is the buried depth of the i-th anchor plate; d is the anchor rod diameter; H eff is the effective length of the spiral anchor; a is the friction coefficient.

[0085] The pull-out bearing capacity of the spiral anchor in sand is:

[0086] Where D is the diameter of the anchor plate; K is the earth pressure coefficient; δ is the friction angle of the contact interface between the anchor plate and the soil; F qi is the pull-out bearing capacity coefficient of the i-th anchor plate, which is defined as the ratio of the pull-out bearing capacity of the i-th spiral anchor plate to its vertical effective stress, that is,

[0087] This equation is applicable to the burial depth condition of

[0088] Where, is the internal friction angle of soil; m is the coefficient related to the internal friction angle of soil; K u is the nominal pull-up coefficient; (H i / D) cr is the critical depth ratio.

[0089] According to the above calculation formula, the pull-out bearing capacity of the spiral anchor in clay and sand was estimated respectively. The relevant results are shown in Table 1.

[0090] Table 1 Calculation results of the pull-out bearing capacity of spiral anchors

[0091] Note: p is the pitch of the spiral anchor plate; the shear strength of clay is s u =20kPa, friction coefficient is a=0.3; sand parameters are γ=17kN / m 3 .

[0092] In order to explore the application prospects of spiral anchors in marine engineering, a comparison is made between spiral anchors and caisson foundations in terms of bearing capacity and cost, as shown in Tables 2 and 3. It can be seen that the advantages of spiral anchors are more obvious.

[0093] Table 2 Comparison results of bearing capacity of spiral anchor and caisson

[0094] Table 3 Comparison results of spiral anchor and caisson costs

[0095] (2) Installation torque required for screw anchor

[0096] The installation torque and pull-up component (Q s and Q h ) is the relationship between

[0097] Further deduction, we get

[0098] Where, T is the installation torque required for the screw anchor; Q s is the friction force on the entire side of the anchor rod; Q h is the end bearing capacity of the i-th anchor plate; D c is the equivalent median diameter of the spiral anchor; λ is the inclination angle of the anchor plate.

[0099] According to formulas (5) and (6), the required installation torque of the spiral anchor is estimated, and the results are shown in Table 4.

[0100] Table 4 Calculation results of the required installation torque for spiral anchors

[0101] (3) Mounting torque provided by the mounting device

[0102] The propeller thrust calculation formula is expressed as F p =ρn 2 D p 4 K t (7)

[0103] Where, F p is the propeller thrust; ρ is the density of water; n is the propeller speed; D p is the propeller diameter; K t is the propeller thrust coefficient.

[0104] The installation device includes multiple propellers with lever arms. The maximum torque that can be provided can be estimated by formula (8), and the results are shown in Table 5. p =ξkF p L p (8)

[0105] Where, T p is the maximum torque provided by the installation device, in kNm; ξ is the reduction factor; k is the number of propellers; L p is the length of the lever arm.

[0106] Table 5 shows that when using two propellers with a diameter of 1 m and a lever arm length of 5 m, the installation torque provided is approximately 135 kNm, which is sufficient for installing small-sized helical anchors in marine engineering. Increasing the number of propellers, increasing the propeller size, or increasing the lever arm length can also increase the installation torque. Therefore, the appropriate number and size of propellers, lever arm length, and other factors can be selected based on the installation torque required for different sizes of helical anchors.

[0107] By calculation, a lookup table similar to that shown in Table 5 can be formed in advance, and the number and size of propellers and the size of the lever arm can be quickly obtained by looking up the table in subsequent use.

[0108] Table 5 Calculation table of maximum torque of installation device

[0109] Note: n is 8r / s; K t Take 0.22.

[0110] The installation torque required for large-sized spiral anchors in marine engineering is about 50 to 3000 kNm, and even up to 5000 kNm. [1] . The hydraulic motors of traditional onshore engineering are difficult to meet the installation torque requirements and are difficult to construct underwater. The device of the present invention achieves high-torque installation by lengthening the lever arm of the propulsion device. From the above data taking the propeller propulsion device as an example, it can be seen that the maximum thrust of a propeller with a diameter of 1.5m can reach 70kN. A propeller with a diameter of 1.5m is placed at the end of each of the three lever arms with a length of 5m. When the three propellers work at the same time, the maximum torque can reach about 1000kNm, which can meet the installation requirements of large-sized spiral anchors in marine engineering.

[0111] Helical anchor foundations are a new and highly effective type of foundation in marine engineering, with applications in offshore wind power generation, wave power generation, and tidal power generation. However, due to limitations in traditional installation methods, helical anchors have not yet gained widespread application in marine engineering. The device proposed in the aforementioned embodiments of the present invention provides a foundation for the widespread application of helical anchors, which will promote the development of various marine resources.

[0112] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An underwater torque installation device, characterized in that, It includes a main body, a propulsion device for providing thrust, and a connection interface. A plurality of propulsion devices for providing thrust are connected to the main body through force arms, and the plurality of propulsion devices are arranged at intervals around the center of the main body. The connection interface is provided at one end of the main body and is used to connect with the torque-applying anchor foundation to be installed.

2. The underwater torque installation device according to claim 1, characterized in that, It further includes a wire untwister, which is provided on the main body, and the wires connecting the propulsion devices are connected to the wire untwister.

3. An underwater torque installation device according to claim 1, characterized in that, The connection interface is used to ensure the connection between the main body of the device and the torque-applying anchor foundation and to ensure the application of torque.

4. An underwater torque installation device according to claim 1, characterized in that, The torque installation equipment is installed in a modular manner, and different configurations of installation equipment are selected according to different working conditions, considering the types, numbers, and force arm sizes of the propulsion devices as well as the arrangement modes of the propulsion devices.

5. An underwater torque installation device according to any one of claims 1-4, characterized in that, The propulsion device includes, but is not limited to, any one of a propeller, a water jet propeller, a pump jet propeller, and a vector propeller.

6. An underwater torque installation device according to any one of claims 1-4, characterized in that, The plurality of propulsion devices are arranged in a single layer or multiple layers around the main body.

7. An underwater torque installation device according to any one of claims 1-4, characterized in that, The force arm adopts a multi-section modular design, and the number of sections of the force arm is determined according to the installation requirements.

8. A method for using an underwater torque installation device, characterized in that, Using the installation equipment according to any one of claims 1-8 to install the anchor foundation includes the following steps: Lift the anchor foundation and the installation bracket into the water. Among them, the installation bracket first lands on the bottom of the water, and then the anchor foundation is lifted and passed through the installation bracket and then contacts the bottom of the water. After stabilization, the lifting is removed. Lift the installation device, and the installation device is connected to the interface on the anchor foundation through the connection interface. After stabilization, the lifting is removed. The propulsion device of the installation device operates to drive the main body to advance so as to drive the anchor foundation into the bottom soil layer.

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