Cable testing device and application method thereof

Abstract

According to the technical scheme, the cable testing device is characterized by comprising a detection frame and a cable socket, one end of a to-be-detected cable is connected with external power supply equipment, and the other end of the to-be-detected cable is connected with the cable socket; comprising a bending mechanism; comprising a fixed sleeve and a movable sleeve which are arranged on the detection frame, and the driving mechanism drives the movable sleeve to move so as to bend the cable to be detected; the electrical detection mechanism comprises a control system with a receiving module, and the receiving module is connected with the cable socket; the insulation detection mechanism comprises an attaching layer which is arranged between the fixed sleeve and the movable sleeve and wraps the outer surface of the cable to be detected, and a plurality of detection patches are arranged on the inner surface of the attaching layer; and the detection patch is electrically connected with the control system. According to the invention, the electric leakage condition caused by bending of the cable and the on-off property of the cable can be accurately detected, and the bending life of the cable can be known.

Description

Technical Field

[0001] The present invention relates to the technical field of cable testing, and more particularly to a cable testing device and a method for using the same. Background Art

[0002] Cables are typically rope-like cables made of several or several groups of conductors twisted together. Each group of conductors is insulated from each other and often twisted around a central core. The entire cable is covered with a highly insulating coating and is used for telecommunications or power transmission. In marine applications, after a ship docks, its generators stop running and power is transmitted to the ship from a shore power box at the dock. Due to wave fluctuations, tidal influences, and the accuracy of the ship's anchoring position, the ship's position is constantly changing. The cable connecting the shore power box to the ship, especially the end of the plug, is prone to bending and stretching, requiring the cable to maintain stable performance under these harsh conditions.

[0003] Currently, there are few testing devices for this type of cable on the market. Generally, the internal wiring harness is checked for damage by testing the continuity of the cable at both ends. However, during the bending process, small cracks will appear in the insulation layer, causing leakage in the insulation layer. In this case, it is difficult to detect leakage problems by simply testing the continuity of the wiring harness. In fact, in the use scenario of ship terminals, due to the high humidity and strong corrosiveness of the air in the marine environment, it will aggravate the aging and damage of the insulation layer. Therefore, once cracks and leakage occur, it will greatly affect the service life and safety. Therefore, it is necessary to effectively detect the leakage of the insulation layer after bending. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a cable testing device and a method of using the same to accurately detect leakage caused by bending of the cable and the continuity of the cable, so as to understand the bending life of the cable.

[0005] To achieve the above object, the present invention provides the following technical solution: a cable line testing device, comprising a detection frame and a cable socket located on one side of the detection frame, one end of the cable to be tested is connected to an external power supply device, and the other end is connected to the cable socket, characterized in that:

[0006] The bending mechanism includes a fixed sleeve and a movable sleeve provided on the detection frame. The cable to be detected passes through the fixed sleeve and the movable sleeve. A driving mechanism is provided at the bottom of the movable sleeve. The driving mechanism drives the movable sleeve to move to achieve bending of the cable to be detected.

[0007] An electrical property detection mechanism includes a control system with a receiving module, wherein the receiving module is connected to the cable socket;

[0008] The insulation detection mechanism includes a bonding layer arranged between a fixed sleeve and a movable sleeve and covering the outer surface of the cable to be detected, and a plurality of detection patches are provided on the inner surface of the bonding layer; the detection patches are electrically connected to the control system.

[0009] The present invention is further configured such that: the fixed sleeve and the movable sleeve are configured as hollow cylindrical structures, and both ends of the fixed sleeve and the movable sleeve are provided with transition arc surfaces for abutting against the cable to be detected.

[0010] The present invention is further configured as follows: the bonding layer is configured as a flexible film, and the bonding layer is stretchable in the length direction.

[0011] The present invention is further configured as follows: an interface for generating negative pressure is provided on the bonding layer, and the interface is connected to an external electromagnetic valve and a vacuum pump.

[0012] The present invention is further configured as follows: connecting portions are provided on the outer circumferences of the fixed sleeve and the movable sleeve, and both ends of the laminating layer in the length direction are respectively sealed and provided on the connecting portions of the fixed sleeve and the movable sleeve;

[0013] A detachable sealing gasket is provided in the fixed sleeve and the movable sleeve, and the sealing gasket is used to fill the gap between the inner wall of the fixed sleeve, the movable sleeve and the cable to be detected.

[0014] The present invention is further configured as follows: an arcuate through slot is provided on the detection frame, an arcuate rack adjacent to the arcuate through slot is provided on the detection frame, a movable seat is provided in the arcuate through slot, a drive motor is provided on the movable seat, the output shaft of the drive motor is connected to a reduction gearbox, the reduction gearbox is connected to a gear meshing with the arcuate rack, the movable seat is moved in the arcuate through slot by the power of the drive motor, a connecting shaft passing through the arcuate through slot is provided on the movable seat, and the connecting shaft is rotatably connected to the movable sleeve.

[0015] The present invention is further configured as follows: the fixed sleeve and the movable sleeve both include an upper cover and a lower cover that are combined with each other, one end of the upper cover and the lower cover are hinged, and the other end is detachably connected.

[0016] The present invention is further configured as follows: the bonding layer is provided with an opening, a sealing film is provided on one side of the opening, and the sealing film is wrapped around the outside of the bonding layer at least once to form a seal by relying on the interlayer pressure and friction between the sealing films.

[0017] The present invention is further configured as follows: the detection patch is configured as a flexible conductive patch and is electrically connected to the control system via a wire, and the detection patch is used to cooperate with the control system to detect leakage current.

[0018] The present invention further provides a method for using the cable testing device, which includes:

[0019] Step 1: Place the movable sleeve and the fixed sleeve of the bending mechanism on the same straight line, and then open the bonding layer of the movable sleeve, the fixed sleeve and the insulation detection mechanism;

[0020] Step 2: Connect the plug at one end of the cable to be tested to the external power supply device, place the other end into the movable sleeve, fixed sleeve and bonding layer, and connect the plug at the end to the cable socket;

[0021] Step 3: Control the movable sleeve to move so that the cable to be tested is bent;

[0022] Step 4: Place the bonding layer close to the cable to be tested so that the test patch is close to the outer surface of the cable;

[0023] Step 5: The external power supply device supplies power to the cable to be tested. The control system determines the continuity of the cable through the signal from the cable socket. At the same time, the control system determines the insulation of the cable after bending through the signal from the detection patch.

[0024] Step 6: Release the adhesion between the bonding layer and the cable, and then control the movable sleeve to move and bend the cable to be tested in another direction;

[0025] Step 7. Repeat steps 4-6 until the insulation or continuity of the cable to be tested fails, and record the number of bends.

[0026] In summary, the present invention has the following beneficial effects:

[0027] The present invention provides a bonding layer for detecting cables between the fixed sleeve and the movable sleeve. When in use, after the cable is bent, the bonding layer can be tightly attached to the cable surface by means of negative pressure adsorption, and cooperate with the detection patch to detect in real time whether the insulation layer of the cable has small cracks and causes leakage after the cable is bent. Compared with the traditional method, this detection method has higher detection accuracy because it is attached to the outer surface of the cable, and after the negative pressure on the bonding layer is released, the bonding layer recovers and the cable can be bent in the opposite direction. After bending, the bonding layer can be again negatively pressured for detection. The traditional detection method cannot bond the cable when it is bent multiple times, but the present invention relies on air pressure adsorption. When it is bent repeatedly, the bonding layer can achieve high-precision detection, which can effectively determine the bending life of the cable. Combined with the continuity detection of the cable socket and the cable harness inside the cable, it provides a favorable data basis for product quality inspection and subsequent product improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the bending mechanism principle.

[0029] Figure 2 It is a schematic diagram of the arc rack structure.

[0030] Figure 3 It is a schematic diagram of the fixed and movable sleeve structure.

[0031] Figure 4 It is a schematic diagram of the principle structure of the bonding layer.

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the cable wrapped with a bonding layer.

[0033] Figure 6 It is a schematic diagram of the wrapping state of the bonding layer.

[0034] Figure 7 This is a connection diagram.

[0035] Figure markings: 1. Detection frame; 2. Cable socket; 4. Bending mechanism; 401. Fixed sleeve; 402. Movable sleeve; 403. Driving mechanism; 4001. Upper cover; 4002. Lower cover; 5. Electrical detection mechanism; 6. Connecting part; 7. Opening; 701. Sealing film; 8. Transition arc surface; 10. Insulation detection mechanism; 1001. Bonding layer; 1002. Detection patch; 11. Cable; 12. Interface; 13. Arc-shaped through groove; 1301. Moving seat; 1302. Arc-shaped rack. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings.

[0037] This embodiment discloses a cable testing device, such as Figure 1-7 As shown, it includes a detection frame 1 and a cable socket 2 located on one side of the detection frame 1. One end of the cable to be detected is connected to an external power supply device, and the other end is connected to the cable socket 2. The cable to be detected is powered by the external power supply device. The power supply device is preferably an adjustable power supply. If the cable has multiple cores, the power supply device can apply different voltages and currents to different cores, and can adjust different detection voltages and currents according to actual needs. This embodiment also includes:

[0038] The bending mechanism 4 includes a fixed sleeve 401 and a movable sleeve 402 arranged on the detection frame 1. The cable to be detected passes through the fixed sleeve 401 and the movable sleeve 402. A driving mechanism 403 is provided at the bottom of the movable sleeve 401. The driving mechanism 403 drives the movable sleeve 402 to move to achieve the bending of the cable to be detected; the bending of the cable to be detected 11 is achieved by setting a bending needle mechanism 4, wherein the fixed sleeve 401 is set in the middle and does not move, and the movable sleeve 402 is set on the outside and performs the bending action, so that the cable between the fixed sleeve 401 and the movable sleeve 402 is bent.

[0039] The electrical detection mechanism 5 includes a control system with a receiving module, which is connected to the cable socket 2; the cable socket 2 identifies the power signal of the input cable 11 of the external power supply device and distinguishes the power data of different wire cores, thereby determining whether the wiring harness inside the cable to be detected is disconnected or short-circuited with each other.

[0040] The insulation detection mechanism 10 includes a bonding layer 1001 disposed between a fixed sleeve 401 and a movable sleeve 402 and covering the outer surface of the cable to be detected. The inner surface of the bonding layer 1001 is provided with a plurality of detection patches 1002; the detection patches 1002 are electrically connected to the control system. Specifically, the detection patches 1002 are configured as flexible conductive sheets and are electrically connected to the control system via wires. The detection patches 1002 are used to cooperate with the control system to detect leakage current. Figure 4 , Figure 4 This is a schematic diagram of a partial bonding layer 1001. The detection patches 1002 are arranged at intervals on the inner surface of the bonding layer 1001, and the corresponding conductive wires extend from one side. At the same time, the number of detection patches 1002 should surround the outer surface of the cable as a whole to ensure accurate detection. Further, the bonding layer 1001 is configured to be able to cling to the surface of the cable 11 to be detected, so that the detection patch 1002 can also be well cling to the cable surface. The detection patch can be a conductive adhesive patch. The control system is equipped with an insulation resistance tester to determine whether there is a problem with the insulation by identifying a sudden drop in resistance value.

[0041] Furthermore, the fixed sleeve 401 and the movable sleeve 402 are configured as hollow cylindrical structures, and transition arc surfaces 8 for abutting the cable to be tested are provided at both ends of the fixed sleeve 401 and the movable sleeve 402. Through the above structure, the solid sleeve 401 and the movable sleeve 402 support the cable. It should be noted that the cable to be tested needs to be able to move axially within the solid sleeve and the movable sleeve. At the same time, the cable extending to the outside through the movable sleeve 402 needs to have a margin. In this way, when bending, the cable can have a certain amount of movement when bending and deforming, ensuring smooth bending of the cable and avoiding the bending mechanism from getting stuck.

[0042] Furthermore, the bonding layer 1001 is configured as a flexible film, which can be stretched in the longitudinal direction. At the same time, the bonding layer 1001 is provided with an interface for generating negative pressure, which is connected to an external electromagnetic valve and vacuum pump. The bonding layer is preferably in the form of a film or cloth, and the material can be selected from flexible materials such as plastic or rubber, so that when negative pressure is applied, it can closely adhere to the outer surface contour of the cable.

[0043] Furthermore, a connecting portion 6 is provided on the outer circumferential surface of the fixed sleeve 401 and the movable sleeve 402, and the two ends of the bonding layer 1001 in the length direction are sealed on the connecting portions 6 of the fixed sleeve and the movable sleeve respectively; wherein, the connecting portion 6 can be set as a groove or a ridge, preferably a groove, and it is only necessary to place the end face of the bonding layer 1001 into the groove, and then insert a sealing strip into the groove to achieve sealing, and the connecting portion 6 as a whole surrounds the outside of the sleeve.

[0044] Furthermore, to achieve a stable airtight seal, removable gaskets are installed within fixed sleeve 401 and movable sleeve 402. These gaskets are used to fill the gap between the inner walls of the fixed and movable sleeves and the cable under test. These gaskets can be replaced with different specifications depending on the thickness of the cable under test. Using these gaskets to achieve a seal effectively prevents air leakage between the sleeves and thinner cables during subsequent negative pressure application, ensuring that the bonding layer remains firmly and securely attached to the cable surface.

[0045] Furthermore, the driving mechanism 403 is specifically provided with: an arc-shaped slot 13 is provided on the detection frame 1, an arc-shaped rack 1302 adjacent to the arc-shaped slot 13 is provided on the detection frame 1, a movable seat 1301 is provided in the arc-shaped slot 13 and moves along the arc-shaped slot 13, a driving motor is provided on the movable seat 1301, the output shaft of the driving motor is connected to the reduction gear, and the reduction gear is further connected to the gear meshing with the arc-shaped rack 1302, and the gear is rotated by the power of the driving motor, so that the gear rotates on the arc-shaped rack. The movable seat 1301 moves on the strip 1302 and drives the movable seat to move in the arc-shaped slot 13. A connecting shaft passing through the arc-shaped slot 13 is provided on the movable seat 1301. A roller is provided in the middle of the connecting shaft. The roller rotates in the arc-shaped slot 13 to assist the movement of the movable seat. The end of the connecting shaft is rotatably connected to the movable sleeve 402, so that the movable sleeve 402 can move with the movable seat 1301 but can also rotate. In this way, when bending, the movable sleeve 402 can be deflected according to the bending condition of the cable.

[0046] Further, refer to Figure 3 The fixed sleeve 401 and the movable sleeve 402 both include an upper cover 4001 and a lower cover 4002 that are combined with each other. One end of the upper cover 4001 and the lower cover 4002 are hinged, and the other end is detachably connected. The above structure enables the opening of the fixed sleeve 401 and the movable sleeve 402, which is convenient for the installation of the cable to be detected. The specific structure of the detachable connection can be a bolt connection. A raised platform is provided on the side of the sleeve, and a through hole is provided on the platform. The upper cover 4001 and the lower cover 4002 can be closed by installing bolts in the through hole.

[0047] Further, refer to Figure 5 and Figure 6The bonding layer 1001 is provided with an opening 7 for inserting the cable 11 during installation. A sealing film 701 is provided on one side of the opening 7. The sealing film 701 is wrapped at least once around the outer side of the bonding layer 1001 to form a seal by relying on the interlayer pressure and friction between the sealing films 701. The sealing film 701 is made of a self-adhesive film material, such as a plastic wrap material. The film layers can be adhered to each other by electrostatic adsorption. In this way, the sealing film 701 can form a seal after being wrapped once, thereby ensuring that there will be no leakage when negative pressure is subsequently drawn. In addition, this structure is very convenient for disassembly and assembly of the bonding layer 1001, and no additional sealing structure is required. After negative pressure is formed, the film layers are sucked tightly by the negative pressure, and the sealing effect can be further improved. Therefore, after negative pressure is formed, the sealing effect is better, which greatly reduces the possibility of leakage and makes the detection of the detection patch more accurate.

[0048] This embodiment also provides a method for using the cable testing device using the above-mentioned cable testing device, which includes:

[0049] Step 1: Place the movable sleeve and the fixed sleeve of the bending mechanism on the same straight line, and then open the bonding layer of the movable sleeve, the fixed sleeve and the insulation detection mechanism;

[0050] Step 2. Connect the plug at one end of the cable to be tested to the external power supply equipment, place the other end into the movable sleeve, fixed sleeve and bonding layer, and connect the plug at the end to the cable socket; install the cable through steps 1 and 2, thereby placing the cable to be tested into the fixed sleeve, movable sleeve and bonding layer from the side to achieve installation, which is more convenient.

[0051] Step 3: Control the movable sleeve to move so that the cable to be tested is bent; specifically, by controlling the driving motor of the driving mechanism, which is set as a servo motor, the cable bending angle can be calculated by controlling the rotation angle and combining the gear ratio and radius to achieve adjustment and control of the cable bending angle.

[0052] Step 4. Place the bonding layer tightly against the cable to be tested so that the detection patch is tightly against the outer surface of the cable. In this embodiment, the bonding layer is preferably tightly against the cable to be tested by negative pressure suction. The negative pressure adsorption method can perfectly fit the surface of the bent cable, and no matter what angle the cable is bent, the bonding layer can be tightly attached, so that the detection patch has high detection accuracy and is easy to use.

[0053] Step 5. The external power supply equipment supplies power to the cable to be tested. The control system determines the continuity of the cable through the signal from the cable socket. At the same time, the control system determines the insulation of the cable after bending through the signal from the detection patch. The continuity and leakage of the cable are detected by the above method, which effectively determines the performance of the cable after bending.

[0054] Step 6: Release the adhesion between the bonding layer and the cable, then control the movable sleeve to move and bend the cable to be tested in the other direction; by releasing the negative pressure, switching the solenoid valve to connect to the atmosphere, or directly filling it with air, the adhesion between the bonding layer and the cable is released, so that when the cable is subsequently bent, the bonding layer will not be entangled by the cable.

[0055] Step 7: Repeat steps 4-6 until the insulation or continuity of the cable under test fails, and record the number of bends. The bent cable is then re-adsorbed by negative pressure and repeatedly bent and tested again until a failure occurs. This provides the cable's bending life. The method of this device demonstrates that after cable installation, subsequent testing and bending are fully automated, with the control system recording the data. This allows for a better understanding of cable performance and data, providing data support for subsequent cable technology improvements.

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cable testing device, comprising a testing frame (1) and a cable socket (2) located on one side of the testing frame (1), wherein one end of the cable to be tested is connected to an external power supply device, and the other end is connected to the cable socket (2), characterized in that: include A bending mechanism (4) comprises a fixed sleeve (401) and a movable sleeve (402) arranged on the detection frame (1); the cable to be detected passes through the fixed sleeve (401) and the movable sleeve (402); a driving mechanism (403) is provided at the bottom of the movable sleeve (401); the driving mechanism (403) drives the movable sleeve (402) to move so as to achieve bending of the cable to be detected; An electrical property detection mechanism (5) includes a control system with a receiving module, wherein the receiving module is connected to the cable socket (2); The insulation detection mechanism (10) comprises a bonding layer (1001) disposed between a fixed sleeve (401) and a movable sleeve (402) and covering the outer surface of a cable to be detected, wherein a plurality of detection patches (1002) are provided on the inner surface of the bonding layer (1001); the detection patches (1002) are electrically connected to a control system.

2. A cable testing device according to claim 1, characterized in that: The fixed sleeve (401) and the movable sleeve (402) are configured as hollow cylindrical structures, and both ends of the fixed sleeve (401) and the movable sleeve (402) are provided with transition arc surfaces (8) for abutting against the detection cable.

3. A cable testing device according to claim 1, characterized in that: The conforming layer (1001) is configured as a flexible film, and the conforming layer (1001) is stretchable in a longitudinal direction.

4. A cable testing device according to claim 1, characterized in that: The bonding layer (1001) is provided with an interface for generating negative pressure, and the interface is connected to an external electromagnetic valve and a vacuum pump.

5. The cable testing device according to claim 1, characterized in that: Connecting portions (6) are provided on the outer circumferential surfaces of the fixed sleeve (401) and the movable sleeve (402), and both ends of the laminating layer (1001) in the length direction are sealed and provided on the connecting portions (6) of the fixed sleeve and the movable sleeve respectively; The fixed sleeve (401) and the movable sleeve (402) are provided with detachable sealing gaskets, which are used to fill the gap between the inner walls of the fixed sleeve and the movable sleeve and the cable to be detected.

6. The cable testing device according to claim 1, characterized in that: The detection frame (1) is provided with an arcuate slot (13), the detection frame (1) is provided with an arcuate rack (1302) adjacent to the arcuate slot (13), a movable seat (1301) is provided in the arcuate slot (13), a driving motor is provided on the movable seat (1301), the output shaft of the driving motor is connected to a reduction gearbox, the reduction gearbox is connected to a gear meshing with the arcuate rack (1302), the driving motor is used to drive the movable seat to move in the arcuate slot (13), a connecting shaft passing through the arcuate slot (13) is provided on the movable seat (1301), and the connecting shaft is rotatably connected to the movable sleeve (402).

7. The cable testing device according to claim 1, characterized in that: The fixed sleeve (401) and the movable sleeve (402) both comprise an upper cover (4001) and a lower cover (4002) that are combined with each other. One end of the upper cover (4001) and the lower cover (4002) are hinged, and the other end is detachably connected.

8. The cable testing device according to claim 1, characterized in that: The laminating layer (1001) is provided with an opening (7), and a sealing film (701) is provided on one side of the opening (7). The sealing film (701) is wrapped around the outer side of the laminating layer (1001) at least once to form a seal by relying on the interlayer pressure and friction between the sealing films (701).

9. The cable testing device according to claim 1, characterized in that: The detection patch (1002) is configured as a flexible conductive sheet and is electrically connected to a control system via a wire. The detection patch (1002) is used to cooperate with the control system to detect leakage current.

10. A method for using a cable testing device, using the cable testing device according to any one of claims 1 to 9, characterized in that: include: Step 1: Place the movable sleeve and the fixed sleeve of the bending mechanism on the same straight line, and then open the bonding layer of the movable sleeve, the fixed sleeve and the insulation detection mechanism; Step 2: Connect the plug at one end of the cable to be tested to the external power supply device, place the other end into the movable sleeve, fixed sleeve and bonding layer, and connect the plug at the end to the cable socket; Step 3: Control the movable sleeve to move so that the cable to be tested is bent; Step 4: Place the bonding layer close to the cable to be tested so that the test patch is close to the outer surface of the cable; Step 5: The external power supply device supplies power to the cable to be tested. The control system determines the continuity of the cable through the signal from the cable socket. At the same time, the control system determines the insulation of the cable after bending through the signal from the detection patch. Step 6: Release the adhesion between the bonding layer and the cable, and then control the movable sleeve to move and bend the cable to be tested in another direction; Step 7. Repeat steps 4-6 until the insulation or continuity of the cable to be tested fails, and record the number of bends.

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