High strength multi-size universal conical cable pull head

Abstract

The application provides a high-strength multi-size universal conical submarine cable traction head, and relates to the technical field of submarine cable construction supporting equipment, which comprises an assembling mechanism; the assembling mechanism comprises a conical clamping assembly, a traction hanging assembly and a core fixing assembly; the conical clamping assembly and the traction hanging assembly are detachably connected; the conical clamping assembly comprises a main conical inner sleeve, a main conical outer sleeve, a detachable conical inner sleeve, a detachable conical outer sleeve, a conical inner sleeve tail plate and a conical outer sleeve tail plate; the traction hanging assembly comprises a first screw rod, a traction pull plate and a first nut. The application can adapt to multiple specifications with one main body, can adapt to multiple diameter submarine cables by replacing replaceable conical outer sleeves of different sizes, greatly reduces the number and cost of clamps, permanently reuses core components, and can be used for a long time repeatedly, only needs to replace small-size detachable sleeves, reduces the cost of loss, and retains the high bearing self-locking characteristics.

Description

Technical Field

[0001] This invention relates to the field of equipment technology for submarine cable construction, and in particular to a high-strength, multi-size universal tapered submarine cable traction head. Background Technology

[0002] With the rapid development of marine engineering industries such as offshore wind power, cross-sea power transmission, and offshore oil and gas development, submarine cables, as the core carriers for marine power transmission and signal communication, are seeing continuous increases in laying scale, laying depth, and single-segment laying length. In the entire construction process, including cable delivery from the factory, offshore laying, underwater maintenance, and fault recovery, the traction head is a key load-bearing component connecting the traction equipment and the cable end. It mainly bears combined loads such as axial tension, wave impact, and water flow disturbance. Its structural strength, adaptability, and connection stability directly determine the safety and efficiency of submarine cable construction, making it a core supporting component ensuring the smooth implementation of submarine cable projects.

[0003] Currently, submarine cable tension tests commonly use a flat anchorage traction head, which consists of multiple steel plates and multiple bolts clamping the armored steel wire to achieve tension transfer during the test.

[0004] However, this technology has obvious drawbacks. One traction head can only be used with one size of submarine cable, resulting in extremely poor versatility. In addition, the tooling costs are high, the cost is high, the replacement efficiency is low, and multiple complete traction heads are required to test submarine cables of different specifications. This results in a large footprint, a large inventory, high hidden costs, numerous specifications, and troublesome management. Relying on planar pressing and bolt locking, the contact area is small and the friction is insufficient. Under high tension, it is very easy to slip, which cannot meet the rigorous test requirements. The stress concentration is obvious, which can easily damage or break the steel wire. Under high tension, it is easy to be damaged, and the reliability is insufficient, which cannot meet the high tension conditions in the deep sea. Summary of the Invention

[0005] To address the technical problems of poor versatility, poor resistance to high tensile forces, and high cost of existing submarine cable traction heads, this invention provides a high-strength, multi-size universal tapered submarine cable traction head.

[0006] The technical solutions provided by the embodiments of the present invention are as follows: This invention provides a high-strength, multi-size, universal tapered submarine cable pulling head, comprising: an assembly mechanism; The assembly mechanism includes a conical clamping assembly, a traction suspension assembly, and a wire core fixing assembly; The tapered clamping assembly and the traction suspension assembly are detachably connected; The conical clamping assembly includes a main conical inner sleeve, a main conical outer sleeve, a detachable conical inner sleeve, a detachable conical outer sleeve, a conical inner sleeve tail plate, and a conical outer sleeve tail plate; The traction suspension assembly includes a first screw, a traction plate, and a first nut; The core fixing assembly includes a conductor crimping tube; The conductor crimping tube is detachably connected to the traction plate by bolts, and the conductor crimping tube is arranged in a ring array along the center point of the traction plate.

[0007] Furthermore, a second screw is passed through the periphery of the main conical inner sleeve, and a second nut is threaded onto the outer annular surface of one end of the second screw.

[0008] Furthermore, a first abutting groove is provided on the outer periphery of the top of the main conical inner sleeve, and a second abutting groove is provided on the inner wall of the bottom of the main conical outer sleeve.

[0009] Furthermore, a third abutment groove is provided on the bottom inner wall of the detachable conical inner sleeve, and a first abutment member is fixedly provided at the bottom of the detachable conical outer sleeve.

[0010] Furthermore, a fourth abutment groove is provided on the inner wall of the top of the detachable conical outer sleeve, and a second abutment member is fixedly provided at the bottom of the conical outer sleeve tail plate.

[0011] Furthermore, the front end of the main conical outer sleeve is provided with a threaded connection section, and the front end of the main conical inner sleeve is simultaneously provided with a threaded structure. The threaded connection section is used to achieve a detachable threaded connection with the detachable conical inner sleeve and the detachable conical outer sleeve.

[0012] Furthermore, both the detachable conical inner sleeve and the detachable conical outer sleeve have inwardly narrowing conical surfaces on their inner walls, and after the sleeves are assembled, the conical surfaces of the inner walls extend towards the axis of the traction head.

[0013] Furthermore, the tapered inner cylinder tail plate is threadedly installed at the tail of the main tapered inner sleeve or the tail of the detachable tapered inner sleeve, and the tapered outer sleeve tail plate is threadedly installed at the tail of the main tapered outer sleeve or the tail of the detachable tapered outer sleeve.

[0014] Furthermore, the first screw passes through the conical clamping body along the axial direction of the traction head, and one end of the first screw is limited and matched with the main conical inner sleeve, while the other end of the first screw and the traction plate are fastened together by the first nut.

[0015] Furthermore, the traction plate is equipped with a self-rotating pull head structure. During the tensile test, the cable torque is released by relying on the self-rotating structure, eliminating the interference of torsional stress on the tensile test data.

[0016] The beneficial effects of the technical solutions provided by the embodiments of the present invention include at least the following: In this invention, a single main body is adaptable to multiple specifications. By replacing the replaceable conical outer sleeves of different sizes, it can accommodate submarine cables of various diameters, significantly reducing the number of clamps and costs. Core components are permanently reusable. The universal conical inner sleeve and the main conical outer sleeve serve as the main body and can be reused for a long time. Only a small-sized disassembly sleeve needs to be replaced, reducing wear and tear costs. It also retains high load-bearing self-locking characteristics. Utilizing the conical self-locking principle, the greater the tensile force, the tighter the clamping, meeting the requirements of deep-sea high-tension testing. Overall replacement is convenient and efficient. The replaceable conical outer sleeve can be quickly disassembled and assembled via threads, significantly shortening the time for changing specifications and improving testing efficiency. At the same time, it reduces the procurement and storage of a large number of dedicated traction heads. Only a small number of universal main bodies and outer sleeves of different specifications are needed. Moreover, the self-rotating pull head of the traction pull plate can achieve a torque-removing effect, eliminating torque during the tension test and achieving rigorous tensile test data. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a high-strength, multi-size universal tapered submarine cable traction head provided in an embodiment of the present invention.

[0019] Figure 2 This is a structural schematic diagram of a high-strength, multi-size universal tapered submarine cable traction head provided in an embodiment of the present invention from another perspective.

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the conical inner cylinder tail plate of a high-strength, multi-size universal conical submarine cable traction head provided in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of a high-strength, multi-size universal tapered submarine cable traction head provided in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the main conical outer casing structure of a high-strength, multi-size universal conical submarine cable traction head provided in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the main conical inner sleeve cross-section structure of a high-strength, multi-size universal conical submarine cable traction head provided in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the detachable conical inner sleeve cross-section structure of a high-strength, multi-size universal conical submarine cable traction head provided in an embodiment of the present invention.

[0025] Figure 8 This is a side view of the traction plate structure of a high-strength, multi-size universal tapered submarine cable traction head provided in an embodiment of the present invention.

[0026] Figure 9 This is a side view diagram of the main conical inner sleeve structure of a high-strength, multi-size universal conical submarine cable traction head provided in an embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the detachable conical outer sleeve structure of a high-strength, multi-size universal conical submarine cable traction head provided in an embodiment of the present invention.

[0028] Reference numerals: 1. Main conical inner sleeve; 2. Main conical outer sleeve; 3. Removable conical inner sleeve; 4. Removable conical outer sleeve; 5. Conical inner sleeve tail plate; 6. Conical outer sleeve tail plate; 7. First screw; 8. Traction pull plate; 9. Conductor crimping pipe; 10. First nut; 11. Second screw; 12. Second nut; 13. First abutment groove; 14. Second abutment groove; 15. Third abutment groove; 16. First abutment member; 17. Fourth abutment groove; 18. Second abutment member.

[0029] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0030] The technical solutions of the present invention will now be described with reference to the accompanying drawings. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some well-known technologies. Furthermore, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0031] like Figures 1 to 10 As shown, an embodiment of the present invention provides a high-strength, multi-size universal tapered submarine cable traction head, comprising: an assembly mechanism; The assembly mechanism includes a tapered clamping assembly, a traction suspension assembly, and a wire core fixing assembly; The tapered clamping assembly and the traction suspension assembly are detachably connected. The conical clamping assembly includes a main conical inner sleeve 1, a main conical outer sleeve 2, a detachable conical inner sleeve 3, a detachable conical outer sleeve 4, a conical inner sleeve tail plate 5, and a conical outer sleeve tail plate 6; The traction suspension assembly includes a first screw 7, a traction pull plate 8, and a first nut 10; The conductor fixing assembly includes conductor crimping tube 9; The conductor crimping tube 9 is detachably connected to the traction plate 8 by bolts, and the conductor crimping tube 9 is arranged in a ring array along the center point of the traction plate 8; In this embodiment of the invention, when using a submarine cable with the largest outer diameter specification, the assembly of the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4 is omitted. The conical inner sleeve tail plate 5 is directly threaded onto the tail of the main conical inner sleeve 1, and the conical outer sleeve tail plate 6 is threaded onto the tail of the main conical outer sleeve 2. At this time, the conical surfaces of the main conical inner sleeve 1 and the main conical outer sleeve 2 cooperate with each other, tightening inward to achieve self-locking clamping of the outer armor of the submarine cable. Then, the insulation at the end of the submarine cable to be tested is stripped, and the exposed conductor core is inserted into the conductor crimping tube 9 for clamping and fixing. Subsequently, the first screw 7 passes through the conical clamping body and the traction plate 8, and the conductor crimping tube 9 is sleeved and fixed on the traction plate 8. After the overall assembly is completed, a tension test can be carried out. When assembling and using small and medium-sized submarine cables, the corresponding model of the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4 are used. The outer sleeve 4 is screwed onto the front end of the main conical inner sleeve 1 and the main conical outer sleeve 2 via the front thread. Then, the conical inner sleeve tail plate 5 and the conical outer sleeve tail plate 6 are screwed onto the tail of the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4, respectively. The conical surface of the inner wall of the detachable sleeve extends to the center of the traction head, reducing the effective clamping diameter of the traction head to adapt to small-diameter submarine cables. The tail plate simultaneously extends the cable clamping length to improve clamping stability. The subsequent assembly method of the conductor crimping tube 9, the first screw 7, and the traction pull plate 8 is the same as that of the large-scale assembly. After the submarine cable tensile test is completed, the traction pull plate 8, the first screw 7, and the conductor crimping tube 9 are removed in sequence. The tail plates on both sides are unscrewed, and the conical inner and outer sleeve structures can be disassembled outward to release the submarine cable. All parts are free from compression damage. The base body and the sleeve can be stored and reused for subsequent tests.

[0032] In one possible implementation, a second screw 11 passes through the periphery of the main conical inner sleeve 1, and a second nut 12 is threaded onto the outer annular surface of one end of the second screw 11. In this embodiment of the invention, when in use, the second screw 11 passes through the periphery of the main conical inner sleeve 1 and the main conical outer sleeve 2, and the second nut 12 provided therein can achieve a stable connection between the main conical inner sleeve 1 and the main conical outer sleeve 2.

[0033] In one possible implementation, a first abutting groove 13 is provided on the outer periphery of the top of the main conical inner sleeve 1, and a second abutting groove 14 is provided on the inner wall of the bottom of the main conical outer sleeve 2. In this embodiment of the invention, the first abutting groove 13 and the second abutting groove 14 are aligned and engaged with each other, limiting the circumferential position of the main conical inner sleeve 1 and the main conical outer sleeve 2, preventing circumferential misalignment of the two after being subjected to force, and ensuring uniform contact of the conical surfaces.

[0034] In one possible implementation, the bottom inner wall of the detachable conical inner sleeve 3 is provided with a third abutting groove 15, and the bottom of the detachable conical outer sleeve 4 is fixed with a first abutting member 16. In this embodiment of the invention, when the sleeve is installed, the first abutting member 16 is embedded in the third abutting groove 15 to complete the positioning, thereby achieving circumferential limiting of the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4, and ensuring that the conical surfaces of the sleeves are coaxially aligned.

[0035] In one possible implementation, a fourth abutment groove 17 is provided on the inner wall of the top of the detachable conical outer sleeve 4, and a second abutment member 18 is fixed at the bottom of the conical outer sleeve tail plate 6. In this embodiment of the invention, after the conical outer sleeve tail plate 6 is tightened, the second abutment member 18 is inserted into the fourth abutment groove 17, which restricts the relative rotation of the tail plate and the detachable conical outer sleeve 4, and extends the cable clamping length by tightening with threads.

[0036] In one possible implementation, a threaded connection section is provided at the front end of the main conical outer sleeve 2, and a threaded structure is simultaneously provided at the front end of the main conical inner sleeve 1. The threaded connection section is used to achieve a detachable threaded connection with the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4. In this embodiment of the invention, the removable conical inner sleeve 3 and the removable conical outer sleeve 4 can be quickly screwed on or removed by the front thread, without disassembling the main components of the traction head. The clamping inner diameter can be quickly changed by replacing sleeves of different specifications to adapt to submarine cables of different thicknesses.

[0037] In one possible implementation, the inner walls of both the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4 are provided with inwardly narrowing conical surfaces, and after the sleeves are assembled, the conical surfaces of the inner walls extend to the axis of the traction head. In this embodiment of the invention, the conical surface converges towards the center to reduce the effective clamping aperture. Combined with the conical self-locking principle, when subjected to tensile force, the detachable conical inner sleeve 3 and the detachable conical outer sleeve 4 tighten inward to clamp the submarine cable armor steel wire, thereby increasing the clamping friction and preventing slippage.

[0038] In one possible implementation, the conical inner cylinder tail plate 5 is threadedly installed at the tail of the main conical inner sleeve 1 or the tail of the detachable conical inner sleeve 3, and the conical outer sleeve tail plate 6 is threadedly installed at the tail of the main conical outer sleeve 2 or the tail of the detachable conical outer sleeve 4. In this embodiment of the invention, tightening the conical inner cylinder tail plate 5 and the conical outer cylinder tail plate 6 can axially press against the corresponding sleeve components, lengthen the cable clamping and covering length, disperse clamping stress, and avoid single-point squeezing damage to the cable wires.

[0039] In one possible implementation, the first screw 7 passes through the conical clamping body along the axial direction of the traction head, and one end of the first screw 7 is limited and engaged with the main conical inner sleeve 1, while the other end of the first screw 7 and the traction pull plate 8 are fastened together by the first nut 10. In this embodiment of the invention, the first screw 7 holds the main body and the traction plate 8 in series. After being locked by the first nut 10, the tension generated by the cable clamping is uniformly transmitted to the traction plate 8, thus completing the overall transmission of the tension load.

[0040] In one possible implementation, the traction plate 8 is equipped with a self-rotating pull head structure. During the tensile test, the cable torque is released by relying on the self-rotating structure to eliminate the interference of torsional stress on the tensile test data. In this embodiment of the invention, when the submarine cable is subjected to tension and generates torsional force, the traction plate 8 spins freely to release the torque, avoids additional torsional load, and ensures accurate and reliable tension test data.

[0041] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: In this invention, a single main body is adaptable to multiple specifications. By replacing the replaceable conical outer sleeves of different sizes, it can accommodate submarine cables of various diameters, significantly reducing the number of clamps and costs. Core components are permanently reusable. The universal conical inner sleeve and the main conical outer sleeve serve as the main body and can be reused for a long time. Only a small-sized disassembly sleeve needs to be replaced, reducing wear and tear costs. It also retains high load-bearing self-locking characteristics. Utilizing the conical self-locking principle, the greater the tensile force, the tighter the clamping, meeting the requirements of deep-sea high-tension testing. Overall replacement is convenient and efficient. The replaceable conical outer sleeve can be quickly disassembled and assembled via threads, significantly shortening the time for changing specifications and improving testing efficiency. At the same time, it reduces the procurement and storage of a large number of dedicated traction heads. Only a small number of universal main bodies and outer sleeves of different specifications are needed. Moreover, the self-rotating pull head of the traction pull plate can achieve a torque-removing effect, eliminating torque during the tension test and achieving rigorous tensile test data.

[0042] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the preferred embodiments, while those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0043] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-strength, multi-size universal tapered submarine cable pulling head, characterized in that, include: Assembly mechanism; The assembly mechanism includes a conical clamping assembly, a traction suspension assembly, and a wire core fixing assembly; The tapered clamping assembly and the traction suspension assembly are detachably connected. The conical clamping assembly includes a main conical inner sleeve (1), a main conical outer sleeve (2), a detachable conical inner sleeve (3), a detachable conical outer sleeve (4), a conical inner sleeve tail plate (5), and a conical outer sleeve tail plate (6). The traction suspension assembly includes a first screw (7), a traction pull plate (8), and a first nut (10); The core fixing assembly includes a conductor crimping tube (9). The conductor crimping tube (9) is detachably connected to the traction plate (8) by bolts, and the conductor crimping tube (9) is arranged in a ring array along the center point of the traction plate (8).

2. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The outer periphery of the main conical inner sleeve (1) is penetrated by a second screw (11), and a second nut (12) is threaded on the outer ring surface of one end of the second screw (11).

3. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The top periphery of the main conical inner sleeve (1) is provided with a first abutting groove (13), and the bottom inner wall of the main conical outer sleeve (2) is provided with a second abutting groove (14).

4. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 3, characterized in that, The bottom inner wall of the detachable conical inner sleeve (3) is provided with a third abutting groove (15), and the bottom of the detachable conical outer sleeve (4) is fixed with a first abutting member (16).

5. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The detachable conical outer sleeve (4) has a fourth abutment groove (17) on the inner wall of its top end, and a second abutment member (18) is fixed at the bottom of the conical outer sleeve tail plate (6).

6. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The front end of the main conical outer sleeve (2) is provided with a threaded connection section, and the front end of the main conical inner sleeve (1) is simultaneously provided with a threaded structure. The threaded connection section is used to achieve a detachable threaded connection with the detachable conical inner sleeve (3) and the detachable conical outer sleeve (4).

7. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The inner walls of the detachable conical inner sleeve (3) and the detachable conical outer sleeve (4) are both provided with conical surfaces that narrow inward. After the sleeves are assembled, the conical surfaces of the inner walls extend towards the axis of the traction head.

8. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The conical inner cylinder tail plate (5) is threadedly installed at the tail of the main conical inner sleeve (1) or the tail of the detachable conical inner sleeve (3), and the conical outer sleeve tail plate (6) is threadedly installed at the tail of the main conical outer sleeve (2) or the tail of the detachable conical outer sleeve (4).

9. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The first screw (7) passes through the conical clamping body along the axial direction of the traction head, and one end of the first screw (7) is limited and matched with the main conical inner sleeve (1), while the other end of the first screw (7) and the traction pull plate (8) are fastened together by the first nut (10).

10. The high-strength, multi-size universal tapered submarine cable pulling head according to claim 1, characterized in that, The traction plate (8) is equipped with a self-rotating pull head structure. During the tensile test, the cable torque is released by relying on the self-rotating structure to eliminate the interference of torsional stress on the tensile test data.

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