A high pressure submarine cable armoring wire recovery process

Abstract

The application discloses a high-voltage submarine cable armored steel wire recovery process, a connecting sleeve is connected on the outer sleeve at the joint of a first submarine cable and a second submarine cable, wherein the connecting sleeve comprises a middle section and a first section and a second section arranged in a convex manner, the first section of the connecting sleeve is inserted into the end of the first submarine cable, so that the armored steel wire on the first submarine cable is sleeved on the outer periphery of the first section of the connecting sleeve, and the end of the armored steel wire on the first submarine cable is welded with the side wall of the middle section; the armored steel wire on the second submarine cable is turned down, and the end of the armored steel wire on the second submarine cable is cut off, so that the end of the armored steel wire on the second submarine cable is welded with the side wall of the middle section. The application provides a high-voltage submarine cable armored steel wire recovery process, which is simple in structure, convenient to recover, and small in length of the connecting sleeve at the joint, so that the submarine cable can be bent and wound by a take-up reel, and is convenient to transport.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a process for restoring the armored steel wire of a high-voltage submarine cable. Background Technology

[0002] Cables serve as a bridge between power supply equipment and power consumption equipment, playing a vital role in transmitting electricity and enjoying wide applications. Modern life and production are inseparable from electricity, and therefore, inseparable from cables. With the widespread use of cables, the required quantity and quality of cable accessories are increasing, and the quality of cable connections varies greatly among different types.

[0003] Cables may suffer damage due to unforeseen circumstances during use, or new projects may necessitate reconnecting the ends of submarine and land cables to restore normal operation. This connection links the conductor cores of the cable, forming a continuous cable. Cable joints must possess adequate insulation and sealing properties, comply with electrical insulation regulations, have a reasonable structure, and be adaptable to environmental requirements. Therefore, the construction and quality of the joints directly affect the stability and reliability of the cable line operation.

[0004] In the existing technology, the armored steel wires at the cable joint are usually connected by a protective sleeve, which results in high cost and cumbersome movement. Moreover, the structure of the protective sleeve at the joint makes it difficult to bend the cable, making it impossible to wind the cable with a take-up reel. Therefore, the cable can only be connected at the laying site, and it is not possible to wind and transport the cable after connecting it at the factory. Summary of the Invention

[0005] To address the shortcomings and defects of existing technologies, a high-voltage submarine cable armored steel wire restoration process is provided. This process is simple in structure, convenient in restoration, and the length of the connecting sleeve at the joint is small, allowing the submarine cable to be bent and wound up by the take-up reel, making transportation convenient.

[0006] To achieve the above objectives, the present invention provides the following technical solutions.

[0007] A process for restoring the armored steel wire of a high-voltage submarine cable includes the following steps:

[0008] S1. Pre-treatment: Remove the units outside the armored steel wires at the ends of the first and second submarine cables to expose the armored steel wires. Then, turn the armored steel wires at the ends of the second submarine cable upwards. Then, according to the pitch of the armored steel wires, install a pitch disc at the ends of the second submarine cable. The pitch disc has multiple through holes along the circumference.

[0009] S2. Unit layer restoration: Restore the connection of each unit layer at the ends of the first and second submarine cables.

[0010] S3. Armored Steel Wire Restoration; specifically includes:

[0011] S31. A connecting sleeve is fitted around the outer periphery of the joint of the first submarine cable and the second submarine cable, wherein the connecting sleeve includes a raised middle section, a first section located on one side of the middle section, and a second section located on the other side of the middle section, and the length of the connecting sleeve is between 8 and 15 cm.

[0012] S32. Insert the first section of the connecting sleeve into the end of the first submarine cable, so that the armored steel wire on the first submarine cable is sleeved on the outer periphery of the first section of the connecting sleeve, and so that the end of the armored steel wire on the first submarine cable is located on one side wall of the middle section, and weld the armored steel wire to the side wall of the middle section.

[0013] S33. Flip down the armored steel wire on the second submarine cable and pass it through the corresponding through hole on the pitch disc. Then, by rotating the pitch disc, restore the pitch of the armored steel wire on the second submarine cable to its original pitch, and allow the armored steel wire on the second submarine cable to be positioned on the outer periphery of the second section of the connecting sleeve. Next, cut off the end of the armored steel wire on the second submarine cable so that the end of the armored steel wire on the second submarine cable is located on the other side wall of the middle section, and weld the armored steel wire to the side wall of the middle section.

[0014] The beneficial effects of this invention are as follows: Before docking, the outer armored steel wires at the ends of the first and second submarine cables are stripped to expose the armored steel wires. Then, the armored steel wires at the end of the second submarine cable are turned upwards. A connecting sleeve is then set at the joint, and the armored steel wires of the first submarine cable are welded to one side wall of the middle section. The armored steel wires of the second submarine cable are then turned downwards and welded to the other side wall of the middle section, thus completing the welding between the armored steel wires on the two joints. The structure is simple and easy to restore. Moreover, only the connecting sleeve structure is used at the joint, eliminating the protective cylinder structure in the existing solution. The size is smaller, and the length of the connecting sleeve is between 8-15cm, which is smaller than the bending radius of the submarine cable. This allows the submarine cable to be wound up by the take-up reel, making transportation convenient. In addition, submarine cable splicing can be realized during factory production.

[0015] As an improvement of the present invention, the height of the protrusion in the middle section is less than the thickness of the armor layer on the first and second submarine cables.

[0016] As an improvement of the present invention, the outermost armored steel wire at the joint of the first submarine cable is located on the outer periphery of the middle section, and the outermost armored steel wire at the joint of the second submarine cable is located on the outer periphery of the middle section and overlaps with the outermost armored steel wire at the joint of the first submarine cable.

[0017] As an improvement of the present invention, one side of the intermediate segment is smoothly connected to the first segment via a first ramp, and the other side of the intermediate segment is smoothly connected to the second segment via a second ramp.

[0018] As an improvement of the present invention, when the pitch disc is installed on the second section of the connecting sleeve, the height of the through hole on the pitch disc is adapted to the height of the middle section of the connecting sleeve.

[0019] As an improvement of the present invention, the length of the connecting sleeve is 10cm, and the length of the first segment is 4cm, the length of the second segment is 4cm, and the length of the middle segment is 2cm.

[0020] As an improvement of the present invention, the pitch disk is provided with a removal groove that communicates with each of the through holes.

[0021] As an improvement of the present invention, the pitch disk is provided with a central hole and an outlet that mates with the central hole. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure during the welding of the armored steel wire of the present invention.

[0023] Figure 2 This is a schematic diagram of the connecting sleeve of the present invention.

[0024] Figure 3 This is a schematic diagram of the pitch disk of the present invention.

[0025] In the diagram, 1. First submarine cable; 2. Second submarine cable; 3. Armored steel wire; 4. Connecting sleeve; 4.1. Intermediate section; 4.2. First section; 4.3. Second section; 4.4. First ramp; 4.5. Second ramp; 5. Pitch disc; 5.1. Center hole; 5.2. Through hole; 5.3. Outlet; 5.4. Outlet groove. Detailed Implementation

[0026] The invention will be further explained with reference to the accompanying drawings.

[0027] See Figures 1 to 3 The process for restoring the armored steel wire 3 of a high-voltage submarine cable, as shown, includes the following steps:

[0028] S1. Pre-treatment: The outer units of the armored steel wires 3 at the ends of the first submarine cable 1 and the second submarine cable 2 are stripped to expose the armored steel wires 3. Then, the armored steel wires 3 at the end of the second submarine cable 2 are flipped upwards. According to the pitch of the armored steel wires 3, a pitch disc 5 is installed at the end of the second submarine cable 2. The center of the pitch disc 5 is provided with a central hole 5.1 that matches the size of the second submarine cable 2. Multiple through holes 5.2 are evenly arranged around the circumference of the pitch disc 5, and the multiple through holes 5.2 are evenly distributed around the outer periphery of the central hole 5.1. The pitch disc 5 is also provided with a dispensing outlet 5.3 that matches the central hole 5.1 and a dispensing groove 5.4 that matches the through holes 5.2. The pitch disc 5 can be inserted into the second submarine cable 2 through the dispensing outlet 5.3 and can be stably installed on the second section 4.3 of the connecting sleeve 4 through the central hole 5.1.

[0029] S2. Unit layer restoration: Each unit layer at the end of the first submarine cable 1 and the end of the second submarine cable 2 is reconnected and restored. The unit layer, from the inside out, includes a conductor, an inner shielding layer, an insulation layer, an outer shielding layer, a metal shielding layer, and an outer sheath. During unit layer restoration, the conductor, inner shielding layer, insulation layer, outer shielding layer, metal shielding layer, and outer sheath at the joint are restored in sequence. During outer sheath restoration, the outer sheath tape is manually wound onto the metal shielding layer, and the outer sheath tape is heated simultaneously to melt and form the outer sheath.

[0030] S3. Armored Steel Wire 3 Restoration; specifically includes the following steps:

[0031] S31. A connecting sleeve 4 is fitted onto the joint between the first submarine cable 1 and the second submarine cable 2. The connecting sleeve 4 is cylindrical in shape and is formed by the interlocking of an upper cylinder and a lower cylinder, which facilitates its fitting onto the outer periphery of the joint.

[0032] The connecting sleeve 4 includes a raised middle section 4.1, a first section 4.2 located on one side of the middle section 4.1 and adjacent to another first submarine cable 1, and a second section 4.3 located on the other side of the middle section 4.1 and adjacent to the second submarine cable 2. The length of the connecting sleeve 4 is between 8 and 15 cm, and the height of the middle section 4.1 is approximately the same as the thickness of the armored steel wire 3 layers on the submarine cable body. In this embodiment, the length of the connecting sleeve 4 is 10 cm, the length of the first section 4.2 is 4 cm, the length of the second section 4.3 is 4 cm, and the length of the middle section 4.1 is 2 cm. One side of the middle section 4.1 is smoothly connected to the first section 4.2 via a first slope 4.4, and the other side of the middle section 4.1 is smoothly connected to the second section 4.3 via a second slope 4.5.

[0033] S32. Axially move the connecting sleeve 4, insert the first section 4.2 of the connecting sleeve 4 into the armored steel wire 3 at the end of the first submarine cable 1, so that the armored steel wire 3 on the first submarine cable 1 is sleeved on the outer periphery of the first section 4.2 of the connecting sleeve 4, and so that the end of the armored steel wire 3 on the first submarine cable 1 is located on the first slope 4.4 on the side wall of the middle section 4.1, and at the same time, so that the innermost armored steel wire 3 on the first submarine cable 1 is in contact with the outer periphery of the first section 4.2, and weld the end of the armored steel wire 3 to the side wall of the middle section 4.1 by argon arc welding;

[0034] S33. Fold down the armored steel wire 3 on the second submarine cable 2 and pass it through the corresponding through hole 5.2, so that the armored steel wire 3 on the second submarine cable 2 can be set on the outer periphery of the second section 4.3 of the connecting sleeve 4. Then, by rotating the pitch disk 5, the armored steel wire 3 on the second submarine cable 2 is twisted, so that the pitch of the armored steel wire 3 on the second submarine cable 2 is restored to the original pitch. Then, the armored steel wire 3 on the second submarine cable 2 is cut off, so that the end of the armored steel wire 3 on the second submarine cable 2 is located on the second slope 4.5 of the side wall of the middle section 4.1, and the end of the armored steel wire 3 is welded to the side wall of the middle section 4.1. Then, the pitch disk 5 is separated from the armored steel wire 3 through the removal groove 5.4, and then the pitch disk 5 is separated from the second section 4.3 submarine cable through the removal outlet 5.3, so that the pitch disk 5 can be removed.

[0035] In addition, the height of the middle section 4.1 is slightly lower than the thickness of the armored steel wire 3 on the first submarine cable 1 and the second submarine cable 2. The outermost armored steel wire 3 on the first submarine cable 1 is located on the outer periphery of the middle section 4.1, and the outermost armored steel wire 3 at the joint of the second submarine cable 2 is located on the outer periphery of the middle section 4.1. Finally, the outermost armored steel wire 3 on the first submarine cable 1 and the outermost armored steel wire 3 on the second submarine cable 2 are welded together.

[0036] The process of this invention involves stripping the outer surface of the armored steel wires 3 at the ends of the first submarine cable 1 and the second submarine cable 2 before docking, exposing the armored steel wires 3. Then, the armored steel wires 3 at the ends of the second submarine cable 2 are flipped upwards. A connecting sleeve 4 is then installed at the joint, and the armored steel wires 3 of the first submarine cable 1 are welded to one side wall of the middle section 4.1. The armored steel wires of the second submarine cable 2 are then flipped downwards and welded to the other side wall of the middle section 4.1, thus completing the welding between the armored steel wires 3 on the two joints. The structure is simple and easy to restore. Moreover, only the connecting sleeve 4 is used at the joint, eliminating the protective cylinder structure in the existing solution. The size is smaller, and the length of the connecting sleeve 4 is between 8-15cm, which is smaller than the bending radius of the submarine cable. This allows the submarine cable to be wound up by the take-up reel, making transportation convenient. This enables the splicing of submarine cables during factory production.

[0037] The above description is only a preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of this patent application are included in the scope of this patent application.

Claims

1. A process for restoring the armored steel wire of a high-voltage submarine cable, characterized in that: Includes the following steps: S1. Pre-treatment: Remove the units outside the armored steel wires at the ends of the first and second submarine cables to expose the armored steel wires. Then, turn the armored steel wires at the ends of the second submarine cable upwards. Then, according to the pitch of the armored steel wires, install a pitch disc at the ends of the second submarine cable. The pitch disc has multiple through holes along the circumference. S2. Unit layer restoration: Restore the connection of each unit layer at the ends of the first and second submarine cables. S3. Armored Steel Wire Restoration; specifically includes: S31. A connecting sleeve is fitted around the outer periphery of the joint of the first submarine cable and the second submarine cable, wherein the connecting sleeve includes a raised middle section, a first section located on one side of the middle section, and a second section located on the other side of the middle section, and the length of the connecting sleeve is between 8 and 15 cm. S32. Insert the first section of the connecting sleeve into the end of the first submarine cable, so that the armored steel wire on the first submarine cable is sleeved on the outer periphery of the first section of the connecting sleeve, and so that the end of the armored steel wire on the first submarine cable is located on one side wall of the middle section, and weld the armored steel wire to the side wall of the middle section. S33. Flip down the armored steel wire on the second submarine cable and pass it through the corresponding through hole on the pitch disc. Then, by rotating the pitch disc, restore the pitch of the armored steel wire on the second submarine cable to its original pitch, and allow the armored steel wire on the second submarine cable to be positioned on the outer periphery of the second section of the connecting sleeve. Next, cut off the end of the armored steel wire on the second submarine cable so that the end of the armored steel wire on the second submarine cable is located on the other side wall of the middle section, and weld the armored steel wire to the side wall of the middle section.

2. The high-voltage submarine cable armor steel wire restoration process according to claim 1, characterized in that: The height of the protrusion in the middle section is less than the thickness of the armor layer on the first and second submarine cables.

3. The high-voltage submarine cable armor steel wire restoration process according to claim 2, characterized in that: The outermost armored steel wire at the upper end of the first submarine cable is located on the outer periphery of the middle section, and the outermost armored steel wire at the end of the second submarine cable is located on the outer periphery of the middle section. The outermost armored steel wires at the ends of the first and second submarine cables overlap on the middle section.

4. The high-voltage submarine cable armor steel wire restoration process according to claim 1, characterized in that: One side of the middle section is smoothly connected to the first section via a first ramp, and the other side of the middle section is smoothly connected to the second section via a second ramp.

5. The high-voltage submarine cable armor steel wire restoration process according to claim 1, characterized in that: The connecting sleeve is 10cm long, with the first segment being 4cm long, the second segment being 4cm long, and the middle segment being 2cm long.

6. The high-voltage submarine cable armor steel wire restoration process according to claim 1, characterized in that: The pitch disk is provided with a removal groove that communicates with each of the through holes.

7. The high-voltage submarine cable armor steel wire restoration process according to claim 1, characterized in that: The pitch disk is provided with a central hole and an outlet that mates with the central hole.

Images