A multi-functional test fixture for quick-change specifications of submarine cables

Abstract

This utility model relates to a multi-functional test fixture for quick-change specifications of submarine cables, capable of conducting conductor tensile tests and cable tension bending tests. It includes a connecting plate, a connecting sleeve, a steel wire gland, and a clamping mold. During conductor tensile testing, the connecting plate is positioned at one end of the connecting sleeve, and they are connected by a double connection via threads and bolts. A clamping mold is installed within the cavity of the clamping mold, and a casting ball head, made of fast-curing resin, is placed on the conductor passing through the clamping mold. During submarine cable bending tests, a steel wire gland is fitted onto the connecting sleeve, and they are connected by bolts. This utility model uses a quick-change clamping mold; different conductor specifications only require replacement of the corresponding clamping mold. The steel wire gland, connecting plate, and connecting sleeve are interchangeable. This saves materials, facilitates assembly and operation, provides strong structural strength, is environmentally friendly, and increases safety. It can simultaneously meet the requirements for tensile testing of conductors of all sizes and the requirements for submarine cable tension bending tests.

Description

Technical Field

[0001] This utility model relates to a test fixture, specifically a test fixture for tensile strength and bending tension of submarine cable conductors. Background Technology

[0002] Traditional conductor tensile strength tests and tensile bending tests use two sets of fixtures, one for tensile testing and the other for tensile bending testing. Traditional conductor tensile strength tests often use mechanical connections, which rely on the clamping pressure generated by the hardware's wedge-shaped chisel, torsion spring, or tightening bolts to connect the conductor to the connecting hardware, forming a detachable joint. This method mainly relies on the frictional force generated by pressure to fix the cable. This method is relatively simple but has the following disadvantages: I. With the continuous development of cable technology, the increase in voltage level and the expansion of conductor cross-section have become inevitable trends. However, for large-section cables, the tensile force that traditional connection methods can withstand is approaching its limit, making it difficult to meet the stability requirements under high load conditions. This undoubtedly poses a greater challenge to cable connection technology.

[0003] Second, the breaking force of the large-section submarine cable reached 700kN during the test. However, there were unreliable connections during the test, which posed certain safety hazards.

[0004] Third, this connection method achieves a fastening effect by using longitudinal tension to form radial pressure on the conductor. The force is mainly on the outer conductor. However, in reality, multiple conductors are all load-bearing components, so this method cannot evenly distribute the tension.

[0005] Fourth, the traditional tensile test fixture for submarine cable conductors and the tension bending test fixture for submarine cables are two sets of fixtures. During the experiment, the fixtures need to be changed separately and the test is conducted separately. The test process is complicated and cannot be completed in one clamping and one test at the same time, resulting in low efficiency. Utility Model Content

[0006] Purpose of the invention: The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a quick-change clamping mold. Different specifications of conductors only need to be replaced with the corresponding clamping mold. At the same time, it can meet the requirements of both tensile test and tension bending test of submarine cable conductors with one set of fixtures. The connecting plate, connecting sleeve and steel wire cover are interchangeable, saving materials, facilitating assembly and operation, and providing strong structural strength. It can meet the requirements of various sizes and specifications of conductors and increases safety. This is a multi-functional test fixture for quick-change of submarine cable specifications.

[0007] Technical solution: In order to solve the above technical problems, the present invention provides a multi-functional test fixture for quick-change specifications of submarine cables, which includes a connecting plate (1) and a connecting sleeve (2). The connecting sleeve (2) is located at one end of the connecting plate (1). The outer sides of the connecting plate (1) and the connecting sleeve (2) are connected by bolts. The bolts are located in the bolt channel (3). The middle parts of the connecting plate (1) and the connecting sleeve (2) are connected by threads. A pull ring (4) is provided at one end of the connecting sleeve (2). The middle part of the connecting sleeve (2) is provided with a connecting plate connecting cavity (5), a pressing mold setting cavity (6), and a pull ring connecting cavity (7) in sequence. They are connected in a continuous manner. A wire channel (8) is provided next to the bolt channel (3).

[0008] Furthermore, a clamping mold (9) is provided in the clamping mold setting cavity (6). The clamping mold (9) has a half-type structure. A conductor channel I (10) is provided in the middle of the clamping mold (9). A sawtooth friction layer (11) is provided on the inner wall of the conductor channel I (10). A casting ball head (13) is provided on the conductor (12) passing through one end of the clamping mold (9). A conductor channel II (14) is provided in the middle of the connecting plate (1).

[0009] Furthermore, the pressing mold (9) includes an upper mold (9.1) and a lower mold (9.2), and bolt connection holes (9.3) are provided on both sides of the upper mold (9.1) and the lower mold (9.2), and mold connection bolts (9.4) are provided in the bolt connection holes (9.3).

[0010] Furthermore, the longitudinal section of the end face of the pressing mold (9) is rectangular or square.

[0011] Furthermore, the longitudinal section of the end face of the connecting plate (1) is circular.

[0012] Furthermore, an internal thread (15) is provided on the inner wall of the pull ring connecting cavity (7), and the pull ring (4) is threadedly connected to the connecting sleeve (2).

[0013] Furthermore, the casting ball head (13) is located in the compression mold cavity (6), and the casting ball head (13) is made of fast-curing resin.

[0014] Furthermore, the inner diameter of the connecting plate connecting cavity (5) is greater than the height of the pressing mold setting cavity (6), and the height of the pressing mold setting cavity (6) is greater than the inner diameter of the pull ring connecting cavity (7).

[0015] Furthermore, a wire cap (16) is fitted onto the connecting sleeve (2), and they are connected by bolts.

[0016] The conductor tensile test procedure of this utility model is as follows: First, the conductor passes through the connecting plate, and then, starting from the center layer of the stranded conductor, it unfolds outward layer by layer, ensuring that the arrangement of each layer of monofilaments is uniform and without crossing or twisting. After the conductor monofilaments are folded back and "bloomed" (i.e., not interlaced), a fast-curing resin is injected to form a cast ball head. A pressing mold is then installed, ensuring that the pressing mold is close to the cast ball head of the conductor and directly presses it onto the conductor. Finally, the connecting sleeve is fitted. The tension bending test procedure is as follows: First, the connecting sleeve is connected to the connecting plate via threads. The submarine cable steel wire passes through the connecting plate and the connecting sleeve in sequence, and then unfolds outward, ensuring that the arrangement of each layer of monofilaments is uniform and without crossing. Then, a steel wire cap is installed, ensuring that the steel wire cap is close to the steel wire, and then connected to the connecting sleeve with bolts and tightened.

[0017] Beneficial effects: Compared with the prior art, the significant advantages of this utility model are: 1. This utility model adopts a quick-change clamping mold. Different specifications of conductors only need to be replaced with the corresponding clamping mold. The connecting plate and connecting sleeve are interchangeable, saving materials and making assembly and operation convenient. 2. This utility model consists of a connecting plate, a connecting sleeve, a wire gland, a pull ring, a pressing mold, and bolts. It has a simple structure and is easy to process and manufacture. 3. Due to the simple structure of this utility model, it is more convenient and quick to operate, which can shorten the joint manufacturing time, speed up the testing process, and improve work efficiency; 4. This utility model consists of a connecting plate, a connecting sleeve, a steel wire gland, a pull ring, a clamping mold, and bolts. It has strong structural strength, can meet the requirements of conductors of various sizes and specifications, increases safety, eliminates safety hazards in the experimental process, and ensures the reliability of the test and the safety of the test personnel. 5. The casting ball head of this utility model adopts the process of injecting fast curing resin glue, which not only has a fast curing speed and can significantly improve production efficiency, but also has no harmful substances volatilized during the entire use process, which is in line with the concept of green environmental protection. 6. This utility model consists of a connecting plate, a connecting sleeve, a steel wire gland, a pull ring, a pressing mold, and bolts, and can simultaneously meet the requirements of submarine cable conductor tensile test and submarine cable tension bending test. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the assembly of the submarine cable tension bending test fixture of this utility model; Figure 2 This is a schematic diagram of the assembly of the submarine cable conductor tensile test fixture of this utility model; Figure 3 This is a cross-sectional view of the connecting plate in this utility model; Figure 4 This is a side view of the connecting plate in this utility model; Figure 5This is a cross-sectional view of the connecting sleeve in this utility model; Figure 6 This is a side view of the connecting sleeve in this utility model; Figure 7 This is a cross-sectional view of the clamping mold in this utility model; Figure 8 This is a side view of the clamping mold in this utility model; Figure 9 This is a cross-sectional view of the wire cap in this utility model; Figure 10 This is a side view of the wire cap in this utility model. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0020] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the multi-functional quick-change tensile test fixture for submarine cables described in this utility model includes a connecting plate (1) and a connecting sleeve (2) during the tensile test of the submarine cable conductor. The connecting sleeve (2) is located at one end of the connecting plate (1). The outer sides of the connecting plate (1) and the connecting sleeve (2) are connected by bolts. The bolts are located in the bolt channel (3). The middle parts of the connecting plate (1) and the connecting sleeve (2) are connected by threads. A pull ring (4) is provided at one end of the connecting sleeve (2). The middle part of the connecting sleeve (2) is provided with a connecting plate connecting cavity (5), a pressing mold setting cavity (6), and a pull ring connecting cavity (7) in sequence. They are connected in a continuous manner. A wire channel (8) is provided next to the bolt channel (3).

[0021] A clamping mold (9) is provided in the clamping mold setting cavity (6). The clamping mold (9) has a half-type structure. A conductor channel I (10) is provided in the middle of the clamping mold (9). A sawtooth friction layer (11) is provided on the inner wall of the conductor channel I (10). A casting ball head (13) is provided on the conductor (12) passing through one end of the clamping mold (9). A conductor channel II (14) is provided in the middle of the connecting plate (1).

[0022] Furthermore, the pressing mold (9) includes an upper mold (9.1) and a lower mold (9.2), and bolt connection holes (9.3) are provided on both sides of the upper mold (9.1) and the lower mold (9.2), and mold connection bolts (9.4) are provided in the bolt connection holes (9.3).

[0023] The longitudinal section of the end face of the pressing mold (9) is rectangular or square.

[0024] The longitudinal section of the end face of the connecting plate (1) is circular.

[0025] The inner wall of the pull ring connecting cavity (7) is provided with an internal thread (15), and the pull ring (4) is threadedly connected to the connecting sleeve (2).

[0026] The casting ball head (13) is located in the cavity (6) of the compression mold, and the casting ball head (13) is made of fast-curing resin.

[0027] The inner diameter of the connecting plate connecting cavity (5) is greater than the height of the pressing mold setting cavity (6), and the height of the pressing mold setting cavity (6) is greater than the inner diameter of the pull ring connecting cavity (7). Example 2

[0028] like Figure 1 , Figure 9 , Figure 10 As shown, in the submarine cable tension bending test: it includes a connecting plate (1), a connecting sleeve (2) and a wire cap (16). The connecting sleeve (2) is located at one end of the connecting plate (1). They are connected in the middle by threads. The wire cap (16) is fitted on the connecting sleeve (2). They are connected on the outside by bolts. One end of the connecting sleeve (2) is provided with a pull ring (4). Wire channels (8) are provided at the edges of the connecting plate (1) and the connecting sleeve (2).

[0029] This invention employs a quick-change clamping mold; different conductor specifications only require replacement of the corresponding clamping mold. The connecting plate and connecting sleeve are interchangeable, saving materials and facilitating assembly. Composed of a connecting plate, connecting sleeve, wire cap, pull ring, clamping mold, and bolts, this invention features a simple structure and is easy to manufacture. Due to its simple structure, operation is more convenient and faster, shortening joint fabrication time, accelerating the testing process, and improving work efficiency. The structure is strong, meeting the requirements of conductors of various sizes, increasing safety, eliminating potential safety hazards during testing, and ensuring the reliability of the test and the safety of test personnel. The casting ball head uses a rapid-curing resin injection process, which not only cures quickly and significantly improves production efficiency but also eliminates the volatilization of harmful substances during use, conforming to the concept of green environmental protection. Composed of a connecting plate, connecting sleeve, wire cap, pull ring, clamping mold, and bolts, this invention can simultaneously meet the requirements of submarine cable conductor tensile testing and submarine cable tension bending testing.

[0030] This utility model provides a concept and method. There are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model. These improvements and modifications should also be considered as the protection scope of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A multi-functional test fixture for quick-change specifications of submarine cables, characterized in that: It includes a connecting plate (1) and a connecting sleeve (2). The connecting sleeve (2) is located at one end of the connecting plate (1). The outer sides of the connecting plate (1) and the connecting sleeve (2) are connected by bolts. The bolts are located in the bolt channel (3). The middle parts of the connecting plate (1) and the connecting sleeve (2) are connected by threads. A pull ring (4) is provided at one end of the connecting sleeve (2). The middle part of the connecting sleeve (2) is provided with a connecting plate connecting cavity (5), a pressing mold setting cavity (6), and a pull ring connecting cavity (7) in sequence. They are connected in a continuous manner. A wire channel (8) is provided next to the bolt channel (3).

2. The multi-functional test fixture for quick changing of cable specifications according to claim 1, characterized in that: A clamping mold (9) is provided in the clamping mold setting cavity (6). The clamping mold (9) has a half-type structure. A conductor channel I (10) is provided in the middle of the clamping mold (9). A sawtooth friction layer (11) is provided on the inner wall of the conductor channel I (10). A casting ball head (13) is provided on the conductor (12) passing through one end of the clamping mold (9). A conductor channel II (14) is provided in the middle of the connecting plate (1).

3. The multi-functional test fixture for quick changing of cable gauges according to claim 2, characterized in that: The pressing mold (9) includes an upper mold (9.1) and a lower mold (9.2). Bolt connection holes (9.3) are provided on both sides of the upper mold (9.1) and the lower mold (9.2). Mold connection bolts (9.4) are provided in the bolt connection holes (9.3).

4. The multi-functional test fixture for quick changing of cable specifications of the submarine cable according to claim 2, characterized in that: The longitudinal section of the end face of the pressing mold (9) is rectangular or square.

5. The subsea cable quick-change gauge multifunction test fixture of claim 1, wherein: The longitudinal section of the end face of the connecting plate (1) is circular.

6. The subsea cable quick-change gauge multifunction test fixture of claim 1, wherein: The inner wall of the pull ring connecting cavity (7) is provided with an internal thread (15), and the pull ring (4) is threadedly connected to the connecting sleeve (2).

7. The multi-functional test fixture for quick-change specifications of submarine cables according to claim 2, characterized in that: The casting ball head (13) is located in the cavity (6) of the compression mold, and the casting ball head (13) is made of fast-curing resin.

8. The multi-functional test fixture for quick changing of cable specifications of the submarine cable according to claim 1, characterized in that: The inner diameter of the connecting plate connecting cavity (5) is greater than the height of the pressing mold setting cavity (6), and the height of the pressing mold setting cavity (6) is greater than the inner diameter of the pull ring connecting cavity (7).

9. The subsea cable quick-change gauge multifunction test fixture of claim 1, wherein: A wire cap (16) is fitted onto the connecting sleeve (2), and they are connected by bolts.

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