Connector for submarine cable tension bending test

Abstract

The utility model discloses a connector used for a submarine cable tension bending test, and relates to the submarine cable tension bending test auxiliary technology field. A plurality of steel wire grooves are formed in the outer edge of the connecting disc at intervals in the circumferential direction of the connecting disc, and the connecting disc is connected with the rotating hanging ring; the plurality of conductor pull rods penetrate through the connecting disc, and one end of each conductor pull rod is connected with the connecting disc and penetrates through the connecting disc; the cone part is mounted at the other end of the conductor pull rod; the conductor clamp is connected with one end of the cone member away from the conductor pull rod. The submarine cable tension bending test joint device solves the technical problem that an existing joint device cannot meet submarine cable tension bending test requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary for submarine cable tension bending test, in particular to a connector for submarine cable tension bending test. Background Technique

[0002] The laying of submarine cables adopts professional laying vessels and is introduced into the water from the vessels. During the laying process, the submarine cables will withstand very large tensions. The tension bending test simulates the tensions suffered during laying to ensure that the submarine cables can withstand various tensions.

[0003] There are two structures for traditional tension bending test joint devices. One of them is a wire mesh sleeve. The wire mesh sleeve relies on the extrusion of steel wires on the surface of the submarine cable to generate friction to fix the cable. Using the wire mesh sleeve as a connecting device has the following disadvantages: (1) Nowadays, the voltage level and cross-section of cables are getting higher and larger. For large cross-section cables, the wire mesh sleeve can no longer withstand such large forces; (2) Since the steel wire armor layer of the submarine cable is coated with asphalt, at high temperatures, the asphalt softens, which will cause the wire mesh sleeve to slip, and in severe cases, it will affect the test progress; (3) The wire mesh sleeve forms a radial pressure on the submarine cable through longitudinal tension to achieve a fastening effect. Its force is mainly on the armor steel wires. In actual situations, both the armor and the conductor of the submarine cable are stressed components, and using the wire mesh sleeve cannot evenly distribute the tensions. The remaining one is the metal nose installation structure, which has the following disadvantages: (1) This method cannot make the copper conductor withstand large tensions and cannot meet the core requirements of the tension bending test. (2) Two separate pull plates are designed for the conductor and the armor steel wires, and are connected by bolts, which not only increases the space occupied by the pull head but also reduces the stability of the pull head when it is stressed. (3) The original technology considered that the steel wire pull plate needed to be connected to the conductor pull plate, and a first screw rod hole was set. This hole increased the outer diameter of the steel wire pull plate, making the outer diameter of the pull plate larger than the outer diameter of the submarine cable, and it would touch the bottom (contact the trestle) during the experiment, greatly increasing the unreliable factors of the experiment (easily hurting the pull head itself and the trestle). (4) The load-bearing pull rod of the original technology is designed as a fixed U-shaped rod, and it does not consider that the torsion carried by the submarine cable itself will form a torque accumulation during the experiment. The pull rod without a torsion release function will cause harm to the experimenters or the pull head itself during the experiment and the disassembly process. (5) The armor steel wires are stuck on the steel wire pull plate by means of an additional sleeve, and there are problems such as small force on a single steel wire and few steel wires that can be installed on the plate. Content of the Utility Model

[0004] The purpose of the utility model is to provide a connector for submarine cable tension bending test, which solves the technical problem that the joint device in the prior art cannot meet the requirements of the submarine cable tension bending test.

[0005] The embodiment of the present application discloses a connector for submarine cable tension bending test, including:

[0006] A rotating lifting ring;

[0007] A connecting plate, on the outer edge of which a plurality of steel wire grooves are spaced along its circumferential direction, and the connecting plate is connected to the rotating sling;

[0008] A plurality of conductor pull rods pass through the connecting plate, and one end of the conductor pull rod is connected to the connecting plate and passes through the connecting plate;

[0009] A conical member is installed at the other end of the conductor pull rod;

[0010] A conductor clamp is connected to the end of the conical member away from the conductor pull rod.

[0011] This application simplifies the overall connection structure, and while ensuring the structural stability, it can also ensure the connection stability.

[0012] Based on the above technical solutions, the embodiments of this application can also be improved as follows:

[0013] Further, a plurality of first barbs are provided on the outer surface of the conical member. The beneficial effect of this step is to ensure the stability of the conductor insertion through the first barbs.

[0014] Further, an installation hole matching the conical member is provided inside the conductor clamp, and a second barb matching the first barb is provided on the inner wall of the installation hole. The beneficial effect of this step is to further ensure the stability of the conductor after insertion through the second barb.

[0015] Further, the installation hole is in a horn shape. The beneficial effect of this step is to match with the conical member through the installation hole to ensure the assembly stability of the conical member.

[0016] Further, a connecting portion is provided on the side of the connecting plate facing the rotating sling, and a connecting hole matching the rotating sling is provided in the connecting portion. The beneficial effect of this step is to connect with the rotating sling through the connecting portion to ensure stability.

[0017] Further, the rotating sling is a universal rotating sling. The beneficial effect of this step is to facilitate subsequent operation and use through the universal rotating sling.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. This application abandons the original dynamometer and metal nose structure, steel wire pull plate and conductor pull plate structure, greatly enhancing the stress capacity and longitudinal stability of the conductor part; at the same time, the welding method of the armored steel wire sleeve also increases the stress capacity of the armored part.

[0020] 2. This application can simplify the overall structure, improve the efficiency of installing the connector, reduce the risk of the test, and indirectly improve the test efficiency.

[0021] 3. This application combines the existing conductor bearing plate and wire pulling plate into one connecting plate, greatly reducing the space occupied by the connector while simplifying the structure to be able to withstand the longitudinal force during installation or testing.

[0022] 4. This application designs the cone-shaped part and the conductor clamp, and is provided with barbs on its side wall, which can further ensure the stability of the conductor connection, thereby ensuring the stability of the overall connection.

[0023] 5. This application is not only conducive to the installation by the operator, but also an optimization for disassembly. The pull head itself has the function of untwisting, so that the risk of torque accumulation does not need to be considered during disassembly, reducing the risk coefficient of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of a connector for a submarine cable tension bending test according to a specific embodiment of the present invention;

[0026] Figure 2 It is Figure 1 the exploded structural diagram of;

[0027] Figure 3 It is Figure 1 the structural diagram of the conical body of;

[0028] Figure 4 It is Figure 3 the schematic diagram of the partial A of;

[0029] Figure 5 It is Figure 1 the structural diagram of the conductor clamp of;

[0030] Figure 6 It is Figure 5 the structural diagram of the partial B of;

[0031] The specific reference numerals are as follows:

[0032] 1 - Rotating lifting ring; 2 - Connecting plate; 3 - Conductor pull rod; 4 - Cone-shaped part; 5 - Conductor clamp;

[0033] 201 - Steel wire groove; 202 - Connecting part; 203 - Connecting hole;

[0034] 401 - First barb;

[0035] 501 - Mounting hole; 502 - Second barb. Specific embodiments

[0036] Hereinafter, embodiments of the technical solution of the present utility model will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and thus are only examples and cannot be used to limit the protection scope of the present utility model.

[0037] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present utility model belongs.

[0038] In this application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] To better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings of the specification and specific embodiments.

[0040] Embodiment:

[0041] As Figures 1-6 shown, the embodiment of this application discloses a connector for submarine cable tension bending test, which abandons the original structure of tensiometer + metal nose or wire pulling disc + conductor pulling disc, greatly enhancing the stress capacity and longitudinal stability of the conductor part, so as to ensure the stability of the overall connection.

[0042] As Figure 1 、 2 shown, the specific structure of this application includes:

[0043] Rotating sling 1, which is specifically a universal rotating sling. Specifically, this product is connected to the subsequent connecting disc through threads and has a torque release function. During the experiment, the cable itself will accumulate torque, which can be released through the pull head, reducing the possibility of damage to the submarine cable itself and also reducing the possibility of harm to the operator due to the large torque of the submarine cable during disassembly;

[0044] A connecting disc 2, on the outer edge of the connecting disc 2, a plurality of steel wire grooves 201 are arranged at intervals along its circumferential direction, and the connecting disc 2 is connected to the rotating lifting ring 1; the connecting disc 2 in this application combines the functions of fixing the armored steel wire and connecting the conductor pull rod. After this modification, only the strength of the connecting disc needs to be considered to withstand the test tension. Compared with the original structure (steel wire pulling disc + conductor pulling disc), the strength is higher, the longitudinal stability is greatly improved, and the space is more saved;

[0045] A plurality of conductor pull rods 3 pass through the connecting disc 2, and one end of the conductor pull rod 3 is connected to the connecting disc 2 and passes through the connecting disc 2. The conductor pull rod 3 is designed with threaded connections at both ends to ensure the stability of the overall structure;

[0046] A cone member 4 is installed at the other end of the conductor pull rod 3. The cone member 4 is used to connect the conductor clamp 5 for subsequent connection with the conductor; the cone member 4 is preferably a metal cone;

[0047] A conductor clamp 5 is connected to the end of the cone member 4 away from the conductor pull rod 3.

[0048] Furthermore, in this application, the depth of the steel wire groove 201 is deepened so that multiple armored steel wires can be placed in the same groove, which well conforms to the current situation of more and more multi-layer armored steel wire submarine cables in the market. At the same time, a ring-shaped metal sleeve can be made for multiple steel wires in one groove, and the metal sleeve is fully connected to the armored steel wire by welding, enhancing the load-bearing capacity of the connection head.

[0049] In an embodiment, as Figures 3-6 shown, a plurality of first barbs 401 are arranged on the outer surface of the cone member 4.

[0050] An installation hole 501 matching the cone member 4 is opened inside the conductor clamp 5, and a second barb 502 matching the first barb 401 is arranged on the inner wall of the installation hole 501; during assembly, the cone member 4 is pressed into the conductor clamp 5 so that the barbs inside the conductor clamp and outside the cone member 4 fully contact the copper conductor, ensuring that the copper conductor will not slip off the clamp under force and playing a role in ensuring the force on the conductor.

[0051] The specific installation method is to first insert the copper conductor into the conductor clamp 5, then insert the cone member 4 into the installation hole at the top of the conductor clamp 5, and press the cone member 4 into the conductor clamp 5. The cone member 4 will separate the conductor to make the conductor present a "blooming" shape. At this time, the conductor will contact the inner wall of the conductor clamp 5 and the outer wall of the cone member 4. Both surfaces are provided with barbs for fixing the conductor in contact therewith, so that the conductor can be well stressed; at the same time, compared with the original structure (metal nose + tensiometer), the present invention can provide greater conductor tension and smaller space usage.

[0052] Specifically, the mounting hole 501 is trumpet-shaped, and the trumpet-shaped mounting hole 501 is utilized in this application to further ensure the stability of the connection.

[0053] Wherein, a connecting portion 202 is provided on one side of the connecting disk 2 facing the rotary sling 1, and a connecting hole 203 matching with the rotary sling 1 is formed in the connecting portion 202, which can ensure the stability of the connection between the rotary sling 1 and the connecting portion 202. At the same time, the diameter of the connecting disk 2 can be controlled below the outer diameter of the submarine cable, so that the connector is in a suspended state during the experiment, and only the outer surface of the submarine cable touches the bottom (contacts the trestle), ensuring the stability of the test and not damaging the pulling head and the trestle.

[0054] The installation process of this application is as follows:

[0055] First, pre-treat the submarine cable (three-core) to be tested, strip the insulation and shielding outside the three-core conductor, and expose the metal conductor part.

[0056] Put the conductor clamps 5 on the exposed ends of the three-core conductors respectively. After the conductors completely extend into the conductor clamps 5, put the cone parts 4 into the threaded mounting holes of the conductor clamps 5, and press the cone parts 4 into the conductors by mechanical pressing, so that the conductors are fully in contact with the conductor clamps 5 and the cone parts 4.

[0057] After the copper conductor is connected to the conductor clamp 5, screw the short threaded end of the conductor pull rod 3 into the threaded mounting hole of the conductor clamp 5.

[0058] Insert the long threaded end of the conductor pull rod 3 into the connecting disk 2, and screw on nuts and flat washers and spring washers on the inner and outer parts passing through the connecting disk 2 to play a limiting role.

[0059] After fixing the conductor part, put the steel wires into the steel wire grooves 201 of the connecting disk 2 and connect them to the connecting disk 2 by welding. If there are more steel wires, metal ring sleeves can be added to the steel wires located in one groove to improve the tensile capacity of the steel wires.

[0060] In the description of the present utility model, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0061] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the specification of the present utility model.

Claims

1. A connector for a submarine cable tension bending test, characterized in that: include: Swivel ring; A connecting plate, wherein a plurality of steel wire grooves are arranged at intervals along the circumferential direction of the outer edge of the connecting plate, and the connecting plate is connected to the rotating lifting ring; A plurality of conductor pull rods pass through the connection disk, and one end of the conductor pull rod is connected to the connection disk and passes through the connection disk; A cone member, mounted on the other end of the conductor pull rod; A conductor clamp is connected to an end of the cone member away from the conductor pull rod.

2. The connector according to claim 1, characterized in that: The outer surface of the cone is provided with a plurality of first barbs.

3. The connector according to claim 2, characterized in that: A mounting hole matched with the cone member is provided inside the conductor clamp, and a second barb matched with the first barb is provided on the inner wall of the mounting hole.

4. The connector according to claim 3, characterized in that: The mounting hole is trumpet-shaped.

5. The connector according to claim 1, characterized in that: A connecting portion is provided on one side of the connecting plate facing the rotating lifting ring, and a connecting hole matching with the rotating lifting ring is opened on the connecting portion.

6. The connector according to claim 1, characterized in that: The rotating lifting ring is a universal rotating lifting ring.

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