A method for testing the waterproofness of submarine control cables by simulating real environment flushing

Abstract

The present invention discloses a method for testing the waterproofness of a submarine control cable by simulating a real environment by flushing, including a test seat, a cable sheath is clamped in the middle of the test seat, the cable sheath is connected to a clamp at both ends, the clamp includes a clamp seat, a clip and a clamping nail, a total of four groups of the clip are hinged on the clamp seat, a plurality of groups of clamping nails are installed on the inner side of the clip, and the clamp on the right side is connected to the output shaft of the first motor. The method for testing the waterproofness of a submarine control cable by simulating a real environment by flushing is provided with a clamp, the clamping and fixing of the cable is firm, and it is also convenient for installation and disassembly; the color-changing paper roll is evenly covered on the surface of the cable by winding and covered, and is clamped by two groups of clamps, so as to ensure that the color-changing paper roll is closely attached to the surface of the cable sheath, which is convenient for the test paper to absorb moisture in time and show color, and can simply and clearly display the test effect, is suitable for different working conditions, and brings better prospects for use.

Description

Technical Field

[0001] The present invention relates to the technical field of control cables, and particularly to a method for simulating a real - environment scouring - type waterproof test for submarine control cables. Background Technique

[0002] Submarine cables are wires wrapped with insulating materials and laid under the seabed and underwater in rivers for telecommunication transmission. Modern submarine cables use optical fibers as materials to transmit telephone and Internet signals. They include the following types: impregnated paper - insulated cables, which are only suitable for installation in waters within 500 m in depth; self - contained oil - filled cables. Since the cables are oil - filled, they can be laid in waters up to 500 m in depth without difficulty; extruded - type insulated cables. Ethylene - propylene rubber can prevent tree - like phenomena and local leakage better than polyethylene, enabling submarine cables to function more effectively; gas - filled cables. Gas - filled cables using impregnated paper are more suitable for longer submarine cable networks than oil - filled cables. However, due to the need to operate at high air pressure in deep water, this increases the difficulty of designing the cables and their accessories, and is generally limited to waters within 300 m in depth.

[0003] Since submarine cables must have strong waterproof and anti - penetration properties to prevent seawater from infiltrating into the cables as much as possible in case of cable failures, during the process of manufacturing cables or researching new - material cables, waterproof tests are carried out on the cables. Currently, there is a lack of effective test methods that can simply and clearly display the test results. Therefore, we propose a method for simulating a real - environment scouring - type waterproof test for submarine control cables. Summary of the Invention

[0004] The main purpose of the present invention is to provide a method for simulating a real - environment scouring - type waterproof test for submarine control cables, which can effectively solve the problems in the background technique.

[0005] To achieve the above - mentioned purpose, the technical solution adopted by the present invention is as follows:

[0006] A method for simulating real - environment scouring waterproof test of a submarine control cable, including a test seat. A cable sheath is clamped in the middle position of the test seat. Clamping devices are connected to both ends of the cable sheath. The clamping device includes a clamping seat, clamping pieces and clamping nails. There are four groups of clamping pieces hinged on the clamping seat. A number of groups of clamping nails are installed on the inner side of the clamping pieces. The right - hand clamping device is connected to the output shaft of a first motor. The left - hand clamping device is installed on the inner wall of the test seat through a bearing seat. Sealing plugs are installed at both ends of the cable sheath. A seawater storage tank is arranged at the upper side of the test seat. The water injection pipe of the seawater storage tank is inserted into the cable sheath. A discoloration paper roll is wound around the cable sheath. The discoloration paper roll is wound on a paper tube. The paper tube is installed on a sliding rod. The two ends of the sliding rod are fixed on a sliding - rod bracket. Double - headed lead screws are installed on both inner sides of the test seat through lead - screw supports. Two groups of connecting rods are symmetrically arranged between the two double - headed lead screws. Both ends of the connecting rod are installed on the double - headed lead screw through a lead - screw nut outer sleeve. The lower ends of the two groups of connecting rods are respectively connected to a first hoop and a second hoop. The first hoop and the second hoop are fixed to the bottom of the connecting rod through a connecting piece. Elastic rubber layers are arranged on the inner sides of the first hoop and the second hoop.

[0007] Preferably, a motor housing is arranged outside the first motor. The motor housing is fixed on the right - hand side wall of the test seat. The first motor drives the cable sheath to rotate evenly.

[0008] Preferably, the water injection pipe with a needle is inserted into the cable sheath. A water guide pipe is connected to the bottom of the cable sheath. The water guide pipe extends into a transition groove. The transition groove is located at the bottom of the test seat. A return pipe is arranged between the transition groove and the seawater storage tank and is pumped by a water pump.

[0009] Preferably, the paper tube can move freely and rotate on the sliding rod. The lead - screw thread directions at both ends of the double - headed lead screw are opposite. A lead - screw nut acting on the double - headed lead screw is arranged inside the lead - screw nut outer sleeve.

[0010] Preferably, sprockets are installed on the parts of the two double - headed lead screws extending out of the lead - screw supports. The two sprockets are connected by a chain. One of the double - headed lead screws is connected to a second motor.

[0011] Preferably, the first hoop and the second hoop move towards each other and wrap the middle part of the cable sheath at the same height.

[0012] The present invention provides an underwater control cable simulation of a real - environment scouring waterproof test method. Compared with the prior art, it has the following significant improvements and advantages: A gripper is provided, which can firmly grip and fix the cable, and is also convenient for installation and disassembly. The discoloring paper roll is evenly covered on the cable surface by winding, and is held tightly by two groups of hoop clamps, so as to ensure that the discoloring paper roll is closely attached to the cable sleeve surface, facilitating the timely absorption and color development of moisture by the test paper, clearly showing the test effect, reducing the test cost, and being applicable to cables of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0014] Figure 2 It is a specific installation structure diagram of the cable sheath of the present invention;

[0015] Figure 3 It is a specific structural view of the gripper of the present invention;

[0016] Figure 4 It is a cross - sectional view of the hoop clamp of the present invention.

[0017] In the figure: 1, test seat; 2, cable sheath; 3, gripper; 4, clamping seat; 5, clip; 6, clip nail; 7, first motor; 8, bearing seat; 9, sealing plug; 10, seawater storage tank; 11, water injection pipe; 12, return pipe; 13, discoloring paper roll; 14, paper tube; 15, sliding rod; 16, sliding rod bracket; 17, double - headed lead screw; 18, lead screw support; 19, connecting rod; 20, outer sleeve of lead screw nut; 21, first hoop clamp; 22, second hoop clamp; 23, connecting piece; 24, elastic rubber layer; 25, motor housing; 26, water guide pipe; 27, transition groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Such as Figures 1-4As shown in the figure, a simulation of a real - environment scouring waterproof test method for a submarine control cable includes a test base 1. In the middle position of the test base 1, a cable sheath 2 is clamped and arranged. At both ends of the cable sheath 2, there are connected clamps 3. The clamp 3 includes a clamping seat 4, clamping pieces 5, and clamping nails 6. There are a total of four groups of clamping pieces 5 hinged on the clamping seat 4. On the inner side of the clamping pieces 5, several groups of clamping nails 6 are installed. The right - hand clamp 3 is connected to the output shaft of a first motor 7, and the left - hand clamp 3 is installed on the inner wall of the test base 1 through a bearing seat 8. At both ends of the cable sheath 2, there are installed sealing plugs 9. At the upper side of the edge of the test base 1, there is a seawater storage tank 10. The water injection pipe 11 of the seawater storage tank 10 is inserted into the cable sheath 2. A discoloration paper roll 13 is wound around the cable sheath 2. The discoloration paper roll 13 is wound on a paper tube 14. The paper tube 14 is installed on a sliding rod 15. The two ends of the sliding rod 15 are fixed on a sliding - rod support 16. On both inner sides of the test base 1, a double - headed lead screw 17 is installed through a lead - screw support 18. Between the two groups of double - headed lead screws 17, there are symmetrically arranged two connecting rods 19. Both ends of the connecting rod 19 are installed on the double - headed lead screw 17 through a lead - screw nut outer sleeve 20. The lower ends of the two connecting rods 19 are respectively connected to a first clamp 21 and a second clamp 22. Both the first clamp 21 and the second clamp 22 are fixed to the bottom of the connecting rod 19 through a connecting piece 23. On the inner side surfaces of the first clamp 21 and the second clamp 22, there is an elastic rubber layer 24, which plays an effect of close fitting;

[0020] There is a motor housing 25 outside the first motor 7. The motor housing 25 is fixed on the right - hand side wall of the test base 1. The first motor 7 drives the cable sheath 2 to rotate evenly. The water injection pipe 11 with a needle is inserted into the cable sheath 2. The bottom of the cable sheath 2 is connected to a water guide pipe 26. The water guide pipe 26 extends into a transition groove 27. The transition groove 27 is located at the bottom of the test base 1. A return pipe 12 is arranged between the transition groove 27 and the seawater storage tank 10, and is pumped by a water pump for recycling, reducing waste. The paper tube 14 can move freely and rotate on the sliding rod 15. The lead - screw textures at both ends of the double - headed lead screw 17 are in opposite directions. Inside the lead - screw nut outer sleeve 20, there is a lead - screw nut acting on the double - headed lead screw 17. On the parts of the two groups of double - headed lead screws 17 extending out of the lead - screw support 18, there are installed sprockets. The two sprockets are connected by a chain. One group of double - headed lead screws 17 is connected to a second motor. The first clamp 21 and the second clamp 22 move towards each other and wrap the middle part of the cable sheath 2 at the same height.

[0021] It should be noted that the present invention relates to a method for simulating a real - environment scouring - type waterproof test for a submarine control cable. First, sealing plugs 9 are placed at both ends of the cable to be tested to play a plugging role. Then, the cable sheath 2 to be tested is placed between two sets of grippers 3 and clamped by the clamping pieces 5. One end of the discoloration paper roll 13 is pasted on the cable sheath 2. Then, the first motor 7 is started to drive the cable sheath 2 to rotate, and the discoloration paper roll 13 starts to wind, and at the same time, it pushes the paper tube 14 to rotate and move, so that the discoloration paper roll 13 evenly covers the cable sheath 2. Immediately afterwards, the second motor is started, and the two double - headed lead screws 17 rotate synchronously, driving the first clamp 21 and the second clamp 22 to move towards each other to wrap the middle part of the cable sheath 2. After that, the water injection pipe 11 is inserted into the cable sheath 2, and seawater is injected as needed. The seawater continuously flows inside the cable sheath 2 and is discharged through the water guide pipe 26. Then, by observing whether the discoloration paper roll 13 changes color, the waterproof performance of the cable is judged.

[0022] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for testing the waterproofness of a submarine control cable by simulating a real environment, characterized in that: A test device is used, the test device comprising a test seat (1), a cable sheath (2) is clamped and arranged in the middle position of the test seat (1), both ends of the cable sheath (2) are connected with a clamp (3), the clamp (3) comprises a clamp seat (4), a clamping piece (5) and a clamping nail (6), a total of four groups of the clamping piece (5) are hinged on the clamp seat (4), a plurality of groups of clamping nails (6) are installed on the inner side of the clamping piece (5), the right side of the clamp (3) is connected to the output shaft of the first motor (7), the left side of the clamp (3) is installed on the inner wall of the test seat (1) through a bearing seat (8), sealing plugs (9) are installed at both ends of the cable sheath (2), a seawater reserve tank (10) is arranged on the upper side of the test seat (1), a water injection pipe (11) of the seawater reserve tank (10) is inserted into the cable sheath (2), and the cable sheath (2) A color-changing paper roll (13) is wound on the top, and the color-changing paper roll (13) is wound on a paper tube (14). The paper tube (14) is installed on a slide rod (15). The two ends of the slide rod (15) are fixed on a slide rod bracket (16). Double-headed screws (17) are installed on the two inner sides of the test seat (1) through screw rod supports (18). Two groups of connecting rods (19) are symmetrically arranged between the two groups of double-headed screw rods (17). Both ends of the connecting rods (19) are installed on the double-headed screw rods (17) through screw rod nut sleeves (20). The lower ends of the two groups of connecting rods (19) are respectively connected to a first clamp (21) and a second clamp (22). The first clamp (21) and the second clamp (22) are fixed by a connecting piece (23) and the bottom of the connecting rod (19). The inner side surfaces of the first clamp (21) and the second clamp (22) are provided with an elastic rubber layer (24). The test method is as follows: first, seal plugs (9) are placed at both ends of the cable to be tested to seal the cable, then the cable sheath (2) to be tested is placed between two sets of clamps (3) and clamped by the clamping pieces (5), one end of the color-changing paper roll (13) is attached to the cable sheath (2), and then the first motor (7) is started to drive the cable sheath (2) to rotate, the color-changing paper roll (13) starts to wind, and the paper roll (14) is pushed to rotate and move, so that the color-changing paper roll (13) evenly covers the cable sheath (2). The second motor is then started on the cable sheath (2), and the two sets of double-headed screws (17) rotate synchronously, driving the first clamp (21) and the second clamp (22) to move towards each other, wrapping the middle part of the cable sheath (2), and then inserting the water injection pipe (11) into the cable sheath (2), and continuously injecting seawater, the seawater continues to flow in the cable sheath (2) and is discharged through the water guide pipe (26), and then the waterproof performance of the cable is judged by observing whether the color-changing paper roll (13) changes color.

2. A method for testing the waterproofness of a submarine control cable by simulating a real environment according to claim 1, characterized in that: A motor housing (25) is disposed outside the first motor (7), and the motor housing (25) is fixed on the right side wall of the test seat (1). The first motor (7) drives the cable sheath (2) to rotate evenly.

3. A method for testing the waterproofness of a submarine control cable by simulating a real environment according to claim 2, characterized in that: The water injection pipe (11) has a needle inserted into the cable sheath (2); the bottom of the cable sheath (2) is connected to a water guide pipe (26); the water guide pipe (26) extends into a transition groove (27); the transition groove (27) is located at the bottom of the test seat (1); a return pipe (12) is provided between the transition groove (27) and the seawater storage tank (10), and is pumped by a water pump.

4. A method for testing the waterproofness of a submarine control cable by simulating a real environment according to claim 3, characterized in that: The paper tube (14) is freely movable and rotatable on the slide rod (15); the screw rod textures at both ends of the double-headed screw rod (17) are in opposite directions; and a screw rod nut acting on the double-headed screw rod (17) is disposed inside the screw rod nut sleeve (20).

5. A method for testing the waterproofness of a submarine control cable by simulating a real environment according to claim 4, characterized in that: Sprockets are installed on the parts of the two groups of double-ended screw rods (17) extending out of the screw rod support (18), the two groups of sprockets are connected by chains, and one group of the double-ended screw rods (17) is connected to the second motor.

6. A method for testing the waterproofness of a submarine control cable by simulating a real environment according to claim 5, characterized in that: The first clamp (21) and the second clamp (22) move towards each other and wrap around the middle part of the cable sheath (2) at the same height.

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