Double-cylinder submarine cable laying and recycling winch with adjustable rotating speed and use method of double-cylinder submarine cable laying and recycling winch

Abstract

The invention discloses a double-cylinder submarine cable laying recovery winch with an adjustable rotating speed and a use method. The double-cylinder submarine cable laying recovery winch comprises a base, a cylinder type winch, a power system and a clamping system, the base comprises an operation deck and a supporting frame. A circular hole and a circular groove are formed in the operation deck; the supporting frame is arranged on an operation deck; rolling shafts and cylindrical rollers are evenly distributed in the circular grooves of the operation deck and the supporting frame in the circumferential direction. The drum-type winch comprises an upper rotary drum and a lower rotary drum; the upper rotary drum and the lower rotary drum are rotationally connected into the circular groove; the power system comprises an upper motor and a lower motor; the upper motor is connected with the upper drum; the lower motor is connected with the lower drum; the clamping system comprises an elastic chuck and an electromagnet box; the elastic chuck is connected to the side wall of the upper rotary drum and the side wall of the lower rotary drum; and two electromagnet boxes are arranged at the tail end of each elastic chuck. The submarine cable recovery device can safely and efficiently recover the submarine cable, effectively protect the normal section of the submarine cable, and further save space and cost.

Description

Technical Field

[0001] The invention relates to the field of marine engineering submarine cable laying, recovery and maintenance, in particular to a double-drum submarine cable laying and recovery winch with adjustable speed and a use method thereof. Background Art

[0002] In recent years, with the rapid expansion of offshore platforms and offshore wind power projects, the issue of laying and recycling submarine cables has become increasingly prominent. Submarine cables (submarine cables), as a key component of power or signal transmission, are coated with insulating materials and laid on the seabed. They are mainly divided into submarine power cables and submarine communication cables.

[0003] At present, the differences in diameter and laying and recovery speed of submarine cables of different specifications have resulted in the submarine cable laying vessel being able to handle only one specification of submarine cable, thus limiting work efficiency. The existing submarine cable laying process mainly adjusts the laying tension and water entry angle by regulating the sailing speed of the laying vessel and the release speed of the submarine cable to avoid errors and damage caused by too small a bending radius or too large a tension.

[0004] Submarine cables are often laid directly on the seabed and are susceptible to seawater erosion and damage, which places high demands on their maintenance. In shallow water areas, divers and special diving equipment are usually used for underwater maintenance, while in deep water areas, due to the harsh sea conditions, the difficulty and cost of underwater maintenance are significantly increased. The current maintenance method mainly uses amphibious trenching equipment to clean the seabed mud, dig out the damaged section of the submarine cable, and then divers perform underwater inspections and lock it with slings. The damaged section of the submarine cable is then lifted to the construction ship by a crane and fixed on the deck for repair. However, using a crane to lift the damaged section of the submarine cable to the construction ship and fix it on the deck poses the risk of damage to the normal section of the submarine cable, and increases the complexity of handling on the construction ship. How to store the normal section of the submarine cable on the ship has become a problem. Summary of the invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a double-drum adjustable speed submarine cable laying and recovery winch and a method of use, which are particularly suitable for laying and recovering normal sections of submarine cables in deep sea areas. The double-drum adjustable speed submarine cable laying and recovery winch and the method of use can effectively adjust the cable laying speed by accurately controlling the speed of the winch, and can adapt to a variety of complex construction processes such as direct throwing, laying first and then burying, and laying while burying, significantly improving the laying efficiency and accuracy, being able to safely and efficiently recover submarine cables, and effectively protecting normal sections of submarine cables, further saving space and costs, and meeting the requirements of the "Technical Specifications for Submarine Cable Installation in Offshore Wind Farms" formulated by the China Quality Certification Center (CQC).

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A double-drum adjustable speed submarine cable laying and recovering winch, comprising a base, a drum winch, a power system and a clamping system; the base comprises an operating deck and a support frame; the operating deck is arranged horizontally, and is provided with a circular hole and a circular groove concentric with the circular hole; the support frame is arranged on the operating deck, and is also provided with a circular hole and a circular groove; rollers and cylindrical rollers are evenly arranged in the circular grooves of the operating deck and the support frame according to the circumference, the rollers are connected to the inner side wall of the circular groove, and the cylindrical rollers are sleeved on the outer side of the rollers; the drum winch The disk includes an upper rotating drum and a lower rotating drum; the upper rotating drum is rotatably connected in a circular groove of a support frame, and the lower rotating drum is rotatably connected in a circular groove of an operating deck; the power system includes an upper motor and a lower motor; the upper motor is installed at the bottom of the support frame and connected to the upper rotating drum; the lower motor is installed at the bottom of the operating deck and connected to the lower rotating drum; the clamping system includes an elastic chuck and an electromagnet box; there are two elastic chucks, which are respectively connected to the side wall of the upper rotating drum and the side wall of the lower rotating drum; two electromagnet boxes are arranged at the end of each elastic chuck.

[0007] Preferably, it also includes an external frame, which includes eight baffles, and four baffles are evenly and vertically arranged along the circumference of the support frame and the working deck.

[0008] Preferably, a connecting column is connected to the inner wall of the lower rotating drum, and the connecting column is connected to a transmission shaft coaxial with the lower rotating drum, and the bottom of the transmission shaft passes through a circular hole of the working deck and is connected to a first bevel gear; the output shaft of the lower motor is horizontally arranged and connected to a second bevel gear, and the second bevel gear is meshed with the first bevel gear; a connecting column is connected to the inner wall of the upper rotating drum, and the connecting column is connected to a transmission shaft coaxial with the upper rotating drum, and the bottom of the transmission shaft passes through a circular hole of the support frame and is connected to a third bevel gear; the output shaft of the upper motor is horizontally arranged and connected to a fourth bevel gear, and the fourth bevel gear is meshed with the third bevel gear.

[0009] Preferably, the support frame has four support legs, and the tops of adjacent support legs are connected by a plurality of plate ribs.

[0010] Preferably, two square holes are provided on the top and bottom of the elastic clamp, and the elastic clamp is made of spring steel.

[0011] Preferably, the electromagnet box includes small electromagnets and batteries, a plurality of small electromagnets are located inside the electromagnet box, the battery is connected to each small electromagnet through wires, and a top switch is provided outside the electromagnet box.

[0012] Preferably, the upper motor and the lower motor are respectively connected to the support frame and the working deck through motor support legs, and vibration dampers and rubber pads are installed in the motor support legs.

[0013] Preferably, both the upper motor and the lower motor are DC motors, and the forward and reverse rotation of the motor output shafts are controlled by relays or controllers.

[0014] Preferably, a key is provided at the bottom of the transmission shaft of the lower rotating drum, the first bevel gear has a keyway, and the transmission shaft of the lower rotating drum is connected to the first bevel gear by matching the key and the keyway; a key is provided at the output shaft of the lower motor, the second bevel gear has a keyway, and the output shaft of the lower motor is connected to the second bevel gear by matching the key and the keyway; a key is provided at the bottom of the transmission shaft of the upper rotating drum, the third bevel gear has a keyway, and the transmission shaft of the upper rotating drum is connected to the third bevel gear by matching the key and the keyway; a key is provided at the output shaft of the upper motor, the fourth bevel gear has a keyway, and the output shaft of the upper motor is connected to the fourth bevel gear by matching the key and the keyway.

[0015] A method for using a double-drum adjustable speed submarine cable laying and recovery winch, characterized in that it comprises the following steps: The first step is to lift the submarine cable to the vicinity of the elastic clamp: when it is necessary to lay or recover two specifications of submarine cables, one of the submarine cables lifted by the crane on the laying ship is vertically lowered to the position of the elastic clamp of the upper drum, and the other is lowered to the position of the elastic clamp of the lower drum; the second step is to clamp the submarine cable: first close the electromagnet box, the staff inserts the head of the submarine cable into the elastic clamp, and then opens the electromagnet box, and the elastic clamp tightens the submarine cable; the third step is to recover and lay the submarine cable: set the speed of the upper motor and the lower motor according to the specifications of the submarine cable. When it is necessary to recover the submarine cable, reverse the upper motor and the lower motor. When the normal section is collected, stop the upper motor and the lower motor to prepare for the subsequent submarine cable inspection and maintenance; when it is necessary to lay the submarine cable, make the upper motor and the lower motor rotate forward, and when the laying of the submarine cable is completed, stop the upper motor and the lower motor.

[0016] The present invention has the following beneficial effects: Due to the provision of an elastic chuck, it is possible to clamp submarine cables of different specifications. The provision of an electromagnet box makes the clamping force of the elastic chuck greater, and it can better clamp the submarine cable, thereby meeting the laying and recovery operations of submarine cables of different specifications. Due to the provision of an upper rotating drum and a lower rotating drum, and each of which is provided with a motor for driving, the submarine cable can be laid or recovered at different or the same speeds.

[0017] The invention has strong structural stability, is adaptable to high sea conditions in deep sea areas, is easy to manufacture, has many identical parts, is quick and convenient to install and disassemble, and has a compact design, saving deck area of ​​the laying ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The invention discloses a double-drum adjustable speed submarine cable laying and recovering winch.

[0019] Figure 2 The present invention is a front view of a double-drum adjustable speed submarine cable laying and recovering winch.

[0020] Figure 3 The invention discloses a side view of a double-drum and speed-adjustable submarine cable laying and recovering winch.

[0021] Figure 4 The present invention is a top view of a double-drum adjustable speed submarine cable laying and recovering winch.

[0022] Figure 5 It is a structural schematic diagram of the circular groove in the present invention.

[0023] Figure 6 It is a structural schematic diagram of the circular hole and the motor support leg in the present invention.

[0024] Figure 7 It is a structural schematic diagram of the upper rotating drum in the present invention.

[0025] Figure 8 It is a structural schematic diagram of the connection between the transmission shaft of the lower motor and the lower rotating drum in the present invention.

[0026] Fig. 9 It is a structural schematic diagram of the clamping system in the present invention.

[0027] Fig.10 It is a structural schematic diagram of the electromagnet box in the present invention.

[0028] Fig.11 It is a structural schematic diagram of the connection between the upper motor and the transmission shaft of the upper rotating drum of the present invention.

[0029] The following are: 1. base; 11. working deck; 12. support frame; 121. support leg; 122. plate reinforcement; 13. circular hole; 14. circular groove; 15. roller; 16. cylindrical roller; 2. Drum winch; 21. Upper drum; 211. Third bevel gear; 22. Lower drum; 221. First bevel gear; 23. Connecting column; 3. Power system; 31. Upper motor; 311. Fourth bevel gear; 32. Lower motor; 321. Second bevel gear; 33. Motor support leg; 4. Clamping system; 41. Elastic chuck; 42. Electromagnet box; 421. Small electromagnet; 422. Battery; 423. Top switch; 43. Support column; 5. External frame; 51. Baffle. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0031] like Figures 1 to 11As shown, a double-drum adjustable speed submarine cable laying and recovery winch includes a base 1, a drum winch 2, a power system 3, a clamping system 4 and an external frame 5; all of the above are designed according to ISO 4568: 2021 international standards.

[0032] The base 1 includes a working deck 11 and a supporting frame 12 .

[0033] like Figure 5 As shown, the operation deck 11 is arranged horizontally, and is provided with a circular hole 13, the diameter of which is about 10cm-20cm, and a circular groove 14 concentric with the circular hole 13, the depth of which is about 0.5cm, which complies with the international ship design safety regulations. The operation deck 11 is a special deck on a submarine cable laying ship, usually located in the middle or rear of the ship, and is specially used to place large equipment and machinery required for laying cables, such as laying vehicles, traction machines, slewing systems, capstans, etc. It has a relatively thick thickness and structural strength to support large operation equipment.

[0034] like Figure 4 As shown, the support frame 12 is arranged on the working deck 11, and a circular hole 13 and a circular groove 14 are also formed on the support frame 12; the support frame 12 is made of Q420 steel material, which is a high-strength structural steel used to bear a large load, and is particularly suitable for equipment and pipelines that need to bear weight under a large span and high load, as well as brackets used in complex environments such as offshore. Figure 5 As shown, rollers 15 and cylindrical rollers 16 are evenly arranged in the circular grooves 14 of the working deck 11 and the support frame 12 according to the circumference, the rollers 15 are connected to the inner wall of the circular groove 14, and the cylindrical rollers 16 are sleeved on the outer side of the rollers 15; the rollers 15 and cylindrical rollers 16 are made of carbon steel, which has high hardness, high strength and strong wear resistance, and are suitable for industrial occasions with heavy loads. In the present invention, they are used to carry the upper rotating drum 21 and the lower rotating drum 22. The support frame 12 has four supporting legs 121, and the tops of adjacent supporting legs 121 are connected by multiple plate ribs 122 to increase the structural strength.

[0035] The drum winch 2 comprises an upper drum 21 and a lower drum 22; the upper drum 21 and the lower drum 22 are arranged concentrically.

[0036] The upper drum 21 is rotatably connected in the circular groove 14 of the support frame 12, and its bottom is tangent to the cylindrical roller 16; a plurality of connecting columns 23 are welded on the inner wall of the upper drum 21, and preferably there are eight connecting columns 23 to strengthen the structural strength of the upper drum 21; the connecting column 23 is connected to a transmission shaft coaxial with the upper drum 21, and the bottom of the transmission shaft passes through the circular hole 13 of the support frame 12 and is connected to the third bevel gear 211; the lower drum 22 is rotatably connected in the circular groove 14 of the working deck 11, and its bottom is tangent to the cylindrical roller 16 Tangent; Several connecting columns 23 are welded to the inner wall of the lower drum 22, preferably there are eight connecting columns 23, the connecting columns 23 are connected to a transmission shaft coaxial with the lower drum 22, the bottom of the transmission shaft passes through the circular hole 13 of the working deck 11 and is connected to the first bevel gear 221, a key is provided at the bottom of the transmission shaft, the first bevel gear 221 and the third bevel gear 211 have a keyway, the transmission shaft is connected to the corresponding bevel gear through the key and the keyway, the main function of the key is to transfer torque between the shaft and the bevel gear to prevent them from sliding relative to each other when rotating. It ensures the effective transmission of rotational power and is a rectangular flat key. The transmission shaft is made of 35CrMo steel, which is suitable for high-load and high-speed working environments. The upper drum 21 and the lower drum 22 are made of 80 steel, which can withstand large loads and large working intensity.

[0037] The power system 3 includes an upper motor 31 and a lower motor 32; the upper motor 31 and the lower motor 32 are two completely identical DC motors with a wide speed range, good speed regulation performance, large starting torque and easy control. The forward and reverse rotation of the motor output shaft is controlled by a relay or controller.

[0038] The upper motor 31 is installed at the bottom of the support frame 12 and connected to the upper drum 21; the output shaft of the upper motor 31 is arranged horizontally and connected to the fourth bevel gear 311, which meshes with the third bevel gear 211. The lower motor 32 is installed at the bottom of the working deck 11 and connected to the lower drum 22; the output shaft of the lower motor 32 is arranged horizontally and connected to the second bevel gear 321, which meshes with the first bevel gear 221; the output shafts of the upper motor 31 and the lower motor 32 are both provided with keys, the output shafts are made of carbon steel, the second bevel gear 321 and the fourth bevel gear 311 are provided with keyways and center holes, and the output shafts are connected to the corresponding bevel gears through keys and keyways.

[0039] The upper motor 31 and the lower motor 32 are connected to the support frame 12 and the working deck 11 respectively through four motor support legs 33. The four motor support legs 33 are connected to the upper motor 31 and the support frame 12 by screws, and the four motor support legs 33 are connected to the lower motor 32 and the working deck 11 by screws. The motor support legs 33 are made of carbon steel. Vibration dampers and rubber pads are installed in the motor support legs 33 to reduce the impact of vibration generated when the motor is running on the surrounding environment and protect the motor itself. The motor support legs 33 have the function of adjustable height, and the height of the motor can be adjusted according to the needs of the installation site. The bevel gear is made of alloy steel, which improves its hardness, strength and wear resistance by adding alloy elements, and is suitable for transmission devices under high speed, heavy load or high temperature environment. The bevel gear made of alloy steel has a long service life and stable transmission performance.

[0040] The clamping system 4 includes an elastic clamp 41 and an electromagnet box 42 .

[0041] like Fig. 9 and Fig.10 As shown, there are two elastic chucks 41, which are connected to the side wall of the upper drum 21 and the side wall of the lower drum 22 through support columns 43. The support columns 43 are made of aluminum alloy, which has the characteristics of high strength, corrosion resistance, and conductivity, and are suitable for light load and high frequency operations. The support columns 43 are connected to the corresponding drum side walls by screws. Two square holes are provided above and below the elastic chuck 41 to increase its ductility. The elastic chuck 41 is made of spring steel, which has excellent elastic properties and can withstand large elastic deformation without breaking easily. It has high strength and toughness and is suitable for occasions that require frequent clamping and releasing. The elastic chuck 41 is connected to the support columns 43 by screws.

[0042] Each elastic chuck 41 end is provided with two electromagnet boxes 42. Electromagnet box 42 comprises small electromagnet 421 and battery 422, and some small electromagnets 421 are located inside electromagnet box 42, and its inner iron core is made of soft iron or silicon steel material, and battery 422 is connected with each small electromagnet 421 by electric wire, and electromagnet box 42 is provided with top switch 423 outside, and top switch 423 controls the presence or absence of its magnetic force. Electromagnet box 42 is a kind of device that generates electromagnetism when energized, and the conductive winding that matches its power is wound around the outside of small electromagnet 421 iron core, and this coil that is connected with electric current has magnetic property like magnet, and it is usually made into circular or hoof shape, so that iron core is more easily magnetized. In addition, in order to make small electromagnet 421 demagnetize immediately when power is turned off, often adopt soft iron or silicon steel material that demagnetization is faster to make, such small electromagnet 421 has magnetic property when energized, and magnetic property just disappears thereupon after power is turned off.

[0043] like Figures 2 to 4As shown, the outer frame 5 includes eight baffles 51, and four baffles 51 are evenly and vertically arranged on the support frame 12 and the working deck 11 along the circumference. The baffles 51 are made of galvanized steel, which has the characteristics of corrosion resistance, durability, and easy installation. The galvanized layer can effectively prevent the steel plate from rusting and extend the service life. The baffles 51 are set to limit the area occupied by the submarine cable. When the length of the submarine cable is too long, the baffles 51 can limit the submarine cable from being wound around the upper drum 21 and the lower drum 22 in the height direction, preventing the submarine cable from occupying too much area on the working deck 11 or falling out of the support frame 12.

[0044] The installation steps of this double-drum adjustable speed submarine cable laying and recovery winch are as follows: The first step is to install the lower drum 22 and the lower motor 32: a circular hole 13 with a diameter of 10-20 cm is opened on the working deck 11, and then a concentric circular groove 14 is opened outward with reference to the circular hole 13. The groove depth is about 0.5 cm, and the diameter of the circular groove 14 expands inward and outward by 0.1-0.2 cm according to the diameter of the lower drum 22. Rollers 15 and cylindrical rollers 16 are evenly laid in the circular groove 14 along the circumference.

[0045] Near the circular hole 13 below the working deck 11, four motor support legs 33 are connected to the bottom of the working deck 11 according to the length of the output shaft of the lower motor 32, so as to install the lower motor 32, and the keyway of the second bevel gear 321 is matched with the key of the output shaft of the lower motor 32, and the keyway of the first bevel gear 221 is matched with the key of the rotating shaft of the lower rotating drum 22, and the lower rotating drum 22 is placed on the circular groove 14 so that the bottom of the lower rotating drum 22 is tangent to the cylindrical roller 16, and the second bevel gear 321 on the output shaft of the lower motor 32 is matched with the first bevel gear 221 on the rotating shaft of the lower rotating drum 22.

[0046] The second step is to install the support frame 12: a circular hole 13 is opened in the support frame 12, and a concentric circular groove 14 is opened outwardly, so that the upper and lower circular holes 13 are concentrically aligned, and the four support legs 121 of the support frame 12 are fixed on the working deck 11 by bolts, and rollers 15 and cylindrical rollers 16 are evenly laid in a circle inside the circular groove 14.

[0047] The third step is to install the upper drum 21 and the upper motor 31: near the circular hole 13 below the support frame 12, connect the four motor support legs 33 to the bottom of the support frame 12 according to the length of the output shaft of the upper motor 31, thereby installing the upper motor 31, match the keyway of the fourth bevel gear 311 with the key of the output shaft of the upper motor 31, match the keyway of the third bevel gear 211 with the key of the rotating shaft of the upper drum 21, place the upper drum 21 on the circular groove 14 so that the bottom of the upper drum 21 is tangent to the cylindrical roller 16, and match the fourth bevel gear 311 on the output shaft of the upper motor 31 with the third bevel gear 211 on the rotating shaft of the upper drum 21.

[0048] The fourth step is to install the clamping system 4: the clamping system 4 is installed at the bottom of the side wall of the upper drum 21 and the bottom of the side wall of the lower drum 22, and the clamping system 4 clamps the submarine cable.

[0049] Step 5, install the baffles 51: install four baffles 51 evenly on the working deck 11 according to the circumference, and fix the bottom of each baffle 51 to the working deck 11 by screws. The diameter of the area enclosed by the four baffles 51 is determined by the work task, but the maximum diameter shall not exceed the side length of the rectangle enclosed by the four support legs 121 of the support frame 12. Then install another four baffles 51 evenly on the support frame 12 according to the circumference, and the installation is now complete.

[0050] The method of using a double-drum adjustable speed submarine cable laying and recovery winch is as follows: The first step is to hoist the submarine cable to the vicinity of the elastic clamp 41: when two specifications of submarine cables need to be laid or recovered, one of the submarine cables hoisted by the crane on the laying ship is vertically lowered to the position of the elastic clamp 41 of the upper drum 21, and the other is lowered to the position of the elastic clamp 41 of the lower drum 22 through the gap of the outermost plate reinforcement 122 on the support frame 12. The staff reaches the vicinity of the elastic clamp 41 through the opening of the baffle 51.

[0051] The second step is to clamp the submarine cable: first turn off the top switch 423 of the electromagnet box 42, the staff inserts the head of the submarine cable into the elastic clamp 41, and then turns on the top switch 423 of the electromagnet box 42, and the elastic clamp 41 tightens the submarine cable.

[0052] Step 3: Recovering and laying submarine cables: The staff exits the baffle 51 and sets the speeds of the upper and lower DC motors according to the specifications of the submarine cables. When the submarine cable needs to be recovered, the DC motor is reversed. When the normal section is collected, the DC motor is stopped to prepare for the subsequent submarine cable inspection and maintenance. When the submarine cable needs to be laid, the DC motor is rotated forward. When the submarine cable is laid, the DC motor is stopped.

[0053] Therefore, the present invention is easy to install, the rotation speed can be accurately adjusted and controlled, the size of the elastic chuck 41 can be controlled, and it can adapt to various specifications of submarine cables, and can simultaneously perform construction operations on two submarine cables, greatly improving work efficiency. The present invention has a wide field of view, and during the operation of the winch, the staff can observe the status of the submarine cable in real time. Not only can the submarine cable be laid, but it can also be recovered and fixed, effectively solving the problem of laying, recovering and repairing deep-sea submarine cables.

[0054] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A double-drum adjustable speed submarine cable laying and recovery winch, characterized in that: It comprises a base (1), a drum winch (2), a power system (3) and a clamping system (4); The base (1) comprises an operating deck (11) and a supporting frame (12); The working deck (11) is arranged horizontally and is provided with a circular hole (13) and a circular groove (14) which is concentric with the circular hole (13); The support frame (12) is arranged on the working deck (11), and a circular hole (13) and a circular groove (14) are also provided on the support frame (12); rollers (15) and cylindrical rollers (16) are evenly arranged in the circular grooves (14) of the working deck (11) and the supporting frame (12) according to the circumference, the rollers (15) are connected to the inner wall of the circular groove (14), and the cylindrical rollers (16) are sleeved on the outer side of the rollers (15); The drum winch (2) comprises an upper drum (21) and a lower drum (22); The upper rotating drum (21) is rotatably connected in the circular groove (14) of the support frame (12), and the lower rotating drum (22) is rotatably connected in the circular groove (14) of the working deck (11); The power system (3) includes an upper motor (31) and a lower motor (32); The upper motor (31) is installed at the bottom of the support frame (12) and connected to the upper rotating drum (21); The lower motor (32) is installed at the bottom of the working deck (11) and connected to the lower rotating drum (22); The clamping system (4) comprises an elastic clamp (41) and an electromagnet box (42); There are two elastic clamps (41), which are respectively connected to the side wall of the upper rotating cylinder (21) and the side wall of the lower rotating cylinder (22); Two electromagnet boxes (42) are arranged at the end of each elastic clamp (41).

2. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized in that: It also includes an external frame (5), which includes eight baffles (51), and four baffles (51) are evenly and vertically arranged on the support frame (12) and the working deck (11) along the circumference.

3. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized in that: The inner wall of the lower rotating drum (22) is connected to a connecting column (23), the connecting column (23) is connected to a transmission shaft coaxial with the lower rotating drum (22), the bottom of the transmission shaft passes through a circular hole (13) of the working deck (11) and is connected to a first bevel gear (221); the output shaft of the lower motor (32) is arranged horizontally and is connected to a second bevel gear (321), and the second bevel gear (321) is meshed with the first bevel gear (221); The inner wall of the upper rotating drum (21) is connected with a connecting column (23), the connecting column (23) is connected with a transmission shaft coaxial with the upper rotating drum (21), the bottom of the transmission shaft passes through a circular hole (13) of a support frame (12) and is connected with a third bevel gear (211); the output shaft of the upper motor (31) is arranged horizontally and is connected with a fourth bevel gear (311), and the fourth bevel gear (311) is meshed with the third bevel gear (211).

4. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized in that: The support frame (12) has four support legs (121), and the tops of adjacent support legs (121) are connected by a plurality of plate ribs (122).

5. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized in that: Two square holes are provided on the top and bottom of the elastic clamp (41), and the elastic clamp (41) is made of spring steel.

6. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized in that: The electromagnet box (42) comprises small electromagnets (421) and a battery (422). The plurality of small electromagnets (421) are located inside the electromagnet box (42). The battery (422) is connected to each small electromagnet (421) through a wire. A top switch (423) is provided outside the electromagnet box (42).

7. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized in that: The upper motor (31) and the lower motor (32) are respectively connected to the support frame (12) and the working deck (11) through motor support legs (33), and vibration dampers and rubber pads are installed in the motor support legs (33).

8. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 1 is characterized by: The upper motor (31) and the lower motor (32) are both direct current motors, and the forward and reverse rotations of the motor output shafts are controlled by relays or controllers.

9. The double-drum adjustable speed submarine cable laying and recovery winch according to claim 3 is characterized by: A key is provided at the bottom of the transmission shaft of the lower rotating drum (22), the first bevel gear (221) has a key slot, and the transmission shaft of the lower rotating drum (22) is connected to the first bevel gear (221) by the key and the key slot being matched; a key is provided at the output shaft of the lower motor (32), the second bevel gear (321) has a key slot, and the output shaft of the lower motor (32) is connected to the second bevel gear (321) by the key and the key slot being matched; a key is provided at the bottom of the transmission shaft of the upper rotating drum (21), the third bevel gear (211) has a key slot, and the transmission shaft of the upper rotating drum (21) is connected to the third bevel gear (211) by the key and the key slot being matched; an key is provided at the output shaft of the upper motor (31), the fourth bevel gear (311) has a key slot, and the output shaft of the upper motor (31) is connected to the fourth bevel gear (311) by the key and the key slot being matched.

10. A method for using a double-drum adjustable speed submarine cable laying and recovery winch, characterized in that: The steps include: The first step is to hoist the submarine cable to the vicinity of the elastic clamp (41): when it is necessary to lay or recover two types of submarine cables, one of the submarine cables hoisted by the crane on the laying ship is vertically lowered to the position of the elastic clamp (41) of the upper rotating drum (21), and the other is lowered to the position of the elastic clamp (41) of the lower rotating drum (22); The second step is to clamp the submarine cable: first, the electromagnetic box (42) is closed, and the staff inserts the head of the submarine cable into the elastic clamp (41), and then the electromagnetic box (42) is opened, and the elastic clamp (41) tightens the submarine cable; Step 3: Recovering and laying the submarine cable: The rotation speeds of the upper motor (31) and the lower motor (32) are set according to the specifications of the submarine cable. When the submarine cable needs to be recovered, the upper motor (31) and the lower motor (32) are reversed. When the normal section is collected, the upper motor (31) and the lower motor (32) are stopped to prepare for the subsequent submarine cable inspection and maintenance. When the submarine cable needs to be laid, the upper motor (31) and the lower motor (32) are rotated forward. When the laying of the submarine cable is completed, the upper motor (31) and the lower motor (32) are stopped.

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