A traction force testing device for multi-core submarine cables

Abstract

The application discloses a traction force testing device suitable for multi-core submarine cables, which comprises a base, a fixing part, a traction part, a clamping mechanism and a tension detection meter arranged on the base, the fixing part is used for fixing the armored steel wires of the submarine cable, the clamping mechanism is arranged between the fixing part and the traction part, the clamping mechanism comprises a mounting seat and clamping seats, a plurality of mounting ends are formed on the mounting seat, each mounting end is provided with a clamping seat, an installation groove is formed on the clamping seat, the upper side and the lower side of the installation groove are arranged in an inclined mode, clamping blocks are movably arranged on the upper side and the lower side of the installation groove, a clamping space is formed between the two clamping blocks, the cable cores of the submarine cable are respectively inserted into the clamping space and are clamped by the clamping blocks, and the tension detection meter is connected with the mounting seat. The traction force testing device suitable for the multi-core submarine cables can clamp the cable cores and ensure that the cable cores will not be separated from the clamping mechanism when the traction force is applied for testing.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a traction force testing device applicable to multi-core submarine cables. Background Technology

[0002] Before leaving the factory, submarine cables must undergo type tests to assess their mechanical properties, such as their traction force. Type testing refers to tests conducted to verify whether a product meets all the requirements of the technical specifications. Existing traction force testing devices typically consist of pulleys and a traction rod. The submarine cable is fitted into the pulley, and the traction rod secures both ends of the cable. A pulling force is then applied to the rod to test the cable's traction force. Because submarine cables consist of one or more layers of steel wire armor and contain one or more conductors, the contact forces between the conductors and steel wires and the pulley vary when the cable is fixed in the pulley and the rod is pulled, making the traction force test inaccurate.

[0003] A Chinese patent (patent number: CN113567240A) discloses a submarine cable traction force testing device, which fixes the cable core of the submarine cable by injecting glue. However, this connection method is prone to glue failure when a large traction force is applied, causing the cable core to detach from the clamping device, thus resulting in inaccurate traction force performance. Summary of the Invention

[0004] To address the shortcomings and defects of existing technologies, a traction force testing device suitable for multi-core submarine cables is provided. This device can clamp the cable cores to ensure that the cable cores do not detach from the clamping mechanism when traction force is applied for testing.

[0005] To achieve the above objectives, the present invention provides the following technical solutions.

[0006] A traction force testing device suitable for multi-core submarine cables includes a base and a fixing component, a traction component, a clamping mechanism, and a tension test gauge disposed on the base. The fixing component and the traction component are connected by a connecting rod. The fixing component is used to fix the armored steel wires of the submarine cable. The clamping mechanism is disposed between the fixing component and the traction component. The clamping mechanism includes a mounting base and a clamping seat. The mounting base has multiple mounting ends adapted to the number of cable cores of the submarine cable. Each mounting end is respectively mounted with a clamping seat. The clamping seat has a mounting groove. The upper and lower sides of the mounting slot are inclined towards the center. Clamping blocks are movably mounted on the upper and lower sides of the mounting slot, and a clamping space is formed between the two clamping blocks. The cable cores of the submarine cable extend into the clamping space and are clamped by the clamping blocks. One end of the tension gauge is connected to the mounting base, and the other end of the tension gauge is connected to the connecting rod. When a traction force is applied to the traction member, the friction between the cable core and the clamping block causes the clamping block to tend to move relative to the mounting block, thereby causing the clamping block to clamp the cable core.

[0007] The beneficial effects of the present invention are as follows: When the device of the present invention is used, each cable core is placed in the clamping space and clamped by the clamping block. When a traction force is applied to the traction member, the armored steel wire and the cable core are subjected to force evenly together, which makes the test results accurate. When the cable core is subjected to force, there is a tendency for relative movement between the cable core and the clamping block. This causes the clamping block to move relative to the mounting block through friction. When the clamping block moves along the upper or lower side of the mounting groove, the gap of the clamping space is reduced, which allows the cable core to be clamped more tightly and ensures that the cable core will not come out of the clamping space.

[0008] As an improvement of the present invention, a clamping groove is formed on the side of the clamping block that mates with the cable core. The clamping groove has a V-shaped cross-section, and the clamping block partially covers the outer periphery of the cable core through the clamping groove. This improvement ensures a larger contact area between the clamping block and the cable core, resulting in more stable clamping.

[0009] As an improvement of the present invention, anti-slip ribs are formed on the inner wall of the clamping groove. This improvement increases the friction between the clamping groove and the cable core.

[0010] As an improvement of the present invention, the clamping seat is provided with a first positioning part, the clamping block is provided with a second positioning part, and a tension spring is provided between the first positioning part and the second positioning part. One end of the tension spring is connected to the first positioning part, and the other end of the tension spring is connected to the second positioning part.

[0011] As an improvement of the present invention, the mounting groove of the clamping seat is provided with a stop block that cooperates with the clamping block. The first positioning part and the second positioning part are arranged in a staggered manner, so that the tension spring is inclined as a whole. Under the action of the tension spring, the clamping block has a tendency to move towards the stop block, so that the rear side of the clamping block abuts against the stop block.

[0012] As an improvement of the present invention, the rear end of the stop block is provided with a screw rod, and the mounting base is provided with a screw hole that cooperates with the screw rod. The screw rod passes through the clamping base and cooperates with the screw hole on the mounting base. When the screw rod rotates, it causes the stop block to move in the mounting groove.

[0013] As an improvement of the present invention, the plurality of mounting ends are evenly arranged along the circumference.

[0014] As an improvement of the present invention, the connecting rod is provided with a connecting seat, and the mounting seat is provided with a fixing rod at the center, and the mounting seat is fixedly connected to the connecting seat through the fixing rod.

[0015] As an improvement of the present invention, the connecting rod is further provided with an adjustment assembly, which includes an adjustment plate and a locking nut. One end of the tension gauge is connected to the mounting base, and the other end of the tension gauge is fixedly connected to the adjustment plate. The adjustment plate is slidably installed on the connecting rod, and the locking nut is installed on the connecting rod by thread engagement and abuts against the adjustment plate.

[0016] As an improvement of the present invention, baffles are also provided on both sides of the mounting base, and the baffles extend into both sides of the mounting groove. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a top view of the overall structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the clamping mechanism of the present invention.

[0020] Figure 4 This is a schematic diagram of the clamping seat and clamping block of the present invention.

[0021] Figure 5 This is a schematic diagram of the clamping seat and stop block of the present invention.

[0022] Figure 6 This is a schematic diagram of the clamping block structure of the present invention.

[0023] In the diagram, 1. Fixing component; 2. Traction component; 3. Clamping mechanism; 3.1. Mounting base; 3.11. Fixing rod; 3.2. Clamping base; 3.21. Mounting groove; 3.22. First positioning part; 3.3. Clamping block; 3.31. Clamping groove; 3.32. Second positioning part; 3.4. Tension spring; 3.5. Stop block; 3.6. Screw; 3.7. Baffle; 4. Tension gauge; 5. Connecting rod; 6. Cable core; 7. Connecting base; 8. Adjustment assembly; 8.1. Adjusting plate; 8.2. Locking nut. Detailed Implementation

[0024] The invention will be further explained with reference to the accompanying drawings.

[0025] See Figures 1 to 6 The device shown is a traction force testing device for multi-core submarine cables, including a base and a fixing component 1, a traction component 2, a clamping mechanism 3, and a tension test gauge 4 disposed on the base. The fixing component 1 and the traction component 2 are connected by two connecting rods 5. Both sides of the fixing component 1 and the traction component 2 are provided with mounting holes that cooperate with the connecting rods 5. The fixing component 1 is used to fix the armored steel wires of the submarine cable.

[0026] The clamping mechanism 3 is disposed between the fixing member 1 and the traction member 2. The clamping mechanism 3 includes a mounting base 3.1 and a clamping base 3.2. The mounting base 3.1 is mounted on the connecting rod 5 through a connecting base 7. The connecting base 7 has connecting holes on both sides that mate with the connecting rod 5. A fixing rod 3.11 is provided at the center of the mounting base 3.1. The mounting base 3.1 is fixedly connected to the connecting base 7 through the fixing rod 3.11. The mounting base 3.1 has multiple mounting ends that match the number of cable cores 6 of the submarine cable. In this embodiment, the submarine cable has three cores 6, and the corresponding mounting base 3.1 has three mounting ends. The three mounting ends are evenly arranged along the circumference, so that the force on each mounting end is uniform. Each mounting end is equipped with a clamping seat 3.2. One side of the clamping seat 3.2 is fixed to the mounting end of the mounting base 3.1 by screws. The other side of the clamping seat 3.2 forms a mounting groove 3.21. The left and right sides of the mounting groove 3.21 are through, and the front side of the mounting groove 3.21 is open. The upper and lower sides of the mounting groove 3.21 are inclined. That is, the upper side of the mounting groove 3.21 is inclined downward from the back to the front, and the lower side of the mounting groove 3.21 is inclined upward from the back to the front, so that the mounting groove 3.21 is narrowed from the back to the front.

[0027] The mounting groove 3.21 is provided with two clamping blocks 3.3. One clamping block 3.3 is attached to the upper side of the mounting groove 3.21 and can move along the upper side of the mounting groove 3.21. The other clamping block 3.3 is attached to the lower side of the mounting groove 3.21 and can move along the lower side of the mounting groove 3.21. Furthermore, the mounting base 3.1 is provided with baffles 3.7 on both sides. The baffles 3.7 extend into both sides of the mounting groove 3.21 and limit the clamping blocks 3.3 in the mounting groove 3.21 to move left and right, so that the clamping blocks 3.3 can only move back and forth. A clamping space is formed between the two clamping blocks 3.3. The cable core 6 of the submarine cable extends into the clamping space and is clamped by the two clamping blocks 3.3. Because the upper and lower sides of the mounting groove 3.21 are inclined, the clamping block 3.3 can adjust the clamping space size when it moves along the mounting groove 3.21. That is, when the clamping block 3.3 moves forward along the mounting groove 3.21, the gap between the two clamping blocks 3.3 decreases, thereby clamping the cable core 6 more tightly. When the clamping block 3.3 moves backward along the mounting groove 3.21, the gap between the two clamping blocks 3.3 increases, and the clamping force on the cable core 6 decreases.

[0028] Furthermore, a clamping groove 3.31 is formed on the side of the clamping block 3.3 that mates with the cable core 6. The clamping groove 3.31 has a V-shaped cross-section, and the clamping block 3.3 partially covers the outer periphery of the cable core 6 through the clamping groove 3.31. By setting the V-shaped clamping groove 3.31, the contact area between the clamping block 3.3 and the cable core 6 can be increased, making the clamping more stable. In addition, anti-slip ribs are formed on the inner wall of the clamping groove 3.31 to increase the friction between the clamping groove 3.31 and the cable core 6, ensuring that the clamping block 3.3 and the cable core 6 are not prone to relative movement.

[0029] Furthermore, a stop block 3.5 is provided in the mounting groove 3.21 of the mounting base 3.1. The stop block 3.5 is located behind the two clamping blocks 3.3. The clamping base 3.2 is provided with a first positioning part 3.22, and the clamping block 3.3 is provided with a second positioning part 3.32. The first positioning part 3.22 and the second positioning part 3.32 are staggered front to back. A tension spring 3.4 is provided between the first positioning part 3.22 and the second positioning part 3.32. One end of the tension spring 3.4 is connected to the first positioning part 3.22, and the other end of the tension spring 3.4 is connected to the second positioning part 3.32. The tension spring 3.4 is inclined, and under the action of the tension spring 3.4, the two clamping blocks 3.3 tend to move backward, so that the side walls of the two clamping blocks 3.3 abut against the stop block 3.5, thereby advancing the clamping blocks 3.3. The positioning is achieved by means of a stop block 3.5, which is mounted on a mounting base 3.1 via a screw 3.6. The mounting base 3.1 has a screw hole that mates with the screw 3.6. The screw 3.6 passes through a clamping seat 3.2 and engages with the screw hole on the mounting base 3.1. When the screw 3.6 rotates, it causes the stop block 3.5 to rotate and move in a straight line. When the stop block 3.5 moves forward, it pushes the two clamping blocks 3.3 to pull the tension spring 3.4 forward. Through the action of the upper and lower sides of the clamping groove 3.31, the clamping space between the two clamping blocks 3.3 is reduced. When the stop block 3.5 moves backward, the tension spring 3.4 elastically returns to its original position, causing the two clamping blocks 3.3 to move backward. Through the action of the upper and lower sides of the clamping groove 3.31, the clamping space between the two clamping blocks 3.3 is increased.

[0030] One end of the tension gauge 4 is connected to the mounting base 3.1 via the connecting seat 7, and the other end of the tension gauge 4 is connected to the connecting rod 5. When a traction force is applied to the traction member 2, the friction between the cable core 6 and the clamping block 3.3 causes the clamping block 3.3 to tend to move relative to the mounting block, thereby clamping the cable core 6. Furthermore, the tension gauge 4 can detect the force applied to the cable core 6, thus accurately detecting the traction performance of the submarine cable.

[0031] In use, the device of the present invention places each cable core 6 in the clamping space and clamps the cable core 6 with the clamping block 3.3. When a traction force is applied to the traction member 2, the armored steel wire and the cable core 6 are subjected to force evenly, making the test results accurate. When the cable core 6 is subjected to force, there is a tendency for relative movement between the cable core 6 and the clamping block 3.3. This causes the clamping block 3.3 to move relative to the mounting block through friction. When the clamping block 3.3 moves along the upper or lower side of the mounting groove 3.21, the gap in the clamping space is reduced, thereby clamping the cable core 6 more tightly and ensuring that the cable core 6 will not detach from the clamping space.

[0032] In addition, the connecting rod 5 is also provided with an adjustment component 8, which includes an adjustment plate 8.1 and a locking nut 8.2. One end of the tension gauge 4 is connected to the mounting base 3.1 through the connecting seat 7, and the other end of the tension gauge 4 is fixedly connected to the adjustment plate 8.1. The adjustment plate 8.1 is slidably installed on the connecting rod 5. The locking nut 8.2 is installed on the connecting rod 5 through a threaded engagement and abuts against the adjustment plate 8.1. By rotating the locking nut 8.2, the position of the adjustment plate 8.1 can be adjusted, thereby enabling the distribution of the traction force between the armored steel wires and the cable core 6 of the submarine cable.

[0033] 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 traction force testing device applicable to multi-core submarine cables, comprising a base and a fixing component, a traction component, a clamping mechanism, and a tension gauge disposed on the base, wherein the fixing component and the traction component are connected by a connecting rod, the fixing component is used to fix the armored steel wires of the submarine cable, and the clamping mechanism is disposed between the fixing component and the traction component, characterized in that: The clamping mechanism includes a mounting base and a clamping base. The mounting base has multiple mounting ends adapted to the number of cable cores of the submarine cable. The multiple mounting ends are evenly arranged along the circumference, and a clamping base is installed on each mounting end. The clamping base has a mounting groove, and the upper and lower sides of the mounting groove are inclined. A clamping block is movably mounted on the upper and lower sides of the mounting groove, and a clamping space is formed between two clamping blocks. The cable cores of the submarine cable extend into the clamping space and are clamped by the clamping blocks. The tension gauge is connected to the mounting base. When a traction force is applied to the traction member, the friction between the cable core and the clamping block causes the clamping block to tend to move relative to the mounting block, thereby causing the clamping block to clamp the cable core. The holder has a first positioning part, and the clamping block has a second positioning part. A tension spring is provided between the first and second positioning parts. One end of the tension spring is connected to the first positioning part, and the other end of the tension spring is connected to the second positioning part. A stop block that cooperates with the clamping block is provided in the mounting groove of the holder. The first and second positioning parts are staggered, so that the tension spring is inclined. Under the action of the tension spring, the clamping block tends to move towards the stop block, so that the rear side of the clamping block abuts against the stop block. A screw is provided at the rear end of the stop block. A screw hole that cooperates with the screw is provided on the mounting base. The screw passes through the holder and cooperates with the screw hole on the mounting base. When the screw rotates, it causes the stop block to move in the mounting groove.

2. The traction force testing device applicable to multi-core submarine cables according to claim 1, characterized in that: A clamping groove is formed on one side of the clamping block that mates with the cable core. The clamping groove has a V-shaped cross-section, and the clamping block partially covers the outer periphery of the cable core through the clamping groove.

3. The traction force testing device applicable to multi-core submarine cables according to claim 2, characterized in that: Anti-slip ribs are formed on the inner wall of the clamping groove.

4. The traction force testing device applicable to multi-core submarine cables according to claim 1, characterized in that: The mounting base is also provided with baffles on both sides, and the baffles extend into the left and right sides of the mounting groove.

5. The traction force testing device applicable to multi-core submarine cables according to claim 1, characterized in that: The connecting rod is provided with a connecting seat, and the mounting seat is provided with a fixing rod at the center. The mounting seat is fixedly connected to the connecting seat through the fixing rod.

6. The traction force testing device applicable to multi-core submarine cables according to claim 1, characterized in that: The connecting rod is also provided with an adjustment assembly, which includes an adjustment plate and a locking nut. One end of the tension gauge is connected to the mounting base, and the other end of the tension gauge is fixedly connected to the adjustment plate. The adjustment plate is slidably installed on the connecting rod, and the locking nut is installed on the connecting rod by thread engagement and abuts against the adjustment plate.

Images