A cable line testing device and method of use thereof

Abstract

The application discloses a kind of cable testing devices, and technical scheme main points include detection frame and cable socket, the one end of cable to be detected is connected to external power supply equipment, and the other end is connected with cable socket;Including bending mechanism;Including the fixed sleeve and movable sleeve being set on detection frame, and movable sleeve is moved to realize the bending of cable to be detected by drive mechanism;Electricity detection mechanism, including control system with receiving module, receiving module is connected with cable socket;Insulation detection mechanism, including the adhesion layer being set between fixed sleeve and movable sleeve and covered in the outer surface of cable to be detected, and the inner surface of adhesion layer is equipped with a plurality of detection patches;Detection patch is electrically connected with control system.The application can accurately detect the leakage situation generated by cable due to bending and the continuity of cable, understand the bending life of cable.

Description

Technical Field

[0001] This invention relates to the field of cable testing technology, and more specifically to a cable testing device and its method of use. Background Technology

[0002] Cables are typically rope-like structures made of several or more strands of conductors twisted together. Each strand of conductor is insulated from the others and is often twisted around a central core. The entire cable is covered with a highly insulating outer layer and is used for telecommunications or power transmission. In marine applications, after a ship docks, its generator stops operating, and it relies on shore power boxes on the dock to supply power to the ship. Due to factors such as wave fluctuations, tides, and the accuracy of the ship's mooring position, the ship's position is constantly changing. Under these conditions, the cables connecting the shore power box and the ship, especially the plug ends, are prone to bending and stretching. Therefore, the cables need to maintain stable performance under these harsh conditions.

[0003] Currently, there are few testing devices available for this type of cable. Generally, the damage to the internal cable bundle is determined by checking the continuity at both ends of the cable. However, during bending, tiny cracks can appear in the insulation layer, causing leakage. In such cases, simply checking the continuity of the cable bundle is insufficient to detect the leakage problem. In fact, in marine environments, the high humidity and strong corrosiveness of the air accelerate the aging and damage of the insulation layer. Therefore, once cracks and leakage occur, it significantly affects the service life and safety. Thus, effective detection of insulation leakage after bending is necessary. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a cable testing device and its usage method, which can accurately detect the leakage current caused by bending of the cable and the continuity of the cable, and understand the bending life of the cable.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cable testing device, comprising a testing frame and a cable socket located on one side of the testing frame, 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, characterized in that: it includes...

[0006] The bending mechanism includes a fixed sleeve and a movable sleeve mounted on a testing frame. The cable to be tested passes through the fixed sleeve and the movable sleeve. The bottom of the movable sleeve is provided with a driving mechanism, which drives the movable sleeve to move to achieve bending of the cable to be tested.

[0007] An electrical testing mechanism includes a control system with a receiving module connected to a cable socket;

[0008] An insulation testing mechanism includes an adhesive layer disposed between a fixed sleeve and a movable sleeve and covering the outer surface of the cable to be tested; the inner surface of the adhesive layer is provided with a plurality of testing patches; the testing patches are electrically connected to a control system.

[0009] The present invention is further configured such that: the fixed sleeve and the movable sleeve are hollow cylindrical structures, and the two ends of the fixed sleeve and the movable sleeve are provided with transition arc surfaces for abutting the receiving test cable.

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

[0011] The present invention is further configured such that: the bonding layer is provided with an interface for generating negative pressure, and the interface is connected to an external solenoid valve and a vacuum pump.

[0012] The present invention is further configured such that: a connecting portion is provided on the outer peripheral surface of the fixed sleeve and the movable sleeve, and the two ends of the bonding layer in the length direction are respectively sealed on the connecting portion of the fixed sleeve and the movable sleeve;

[0013] The fixed sleeve and the movable sleeve are equipped with removable sealing gaskets, which are used to fill the gaps between the inner walls of the fixed sleeve and the movable sleeve and the cable to be tested.

[0014] The invention is further configured such that: an arc-shaped through groove is provided on the detection frame, an arc-shaped rack adjacent to the arc-shaped through groove is provided on the detection frame, a movable seat is provided in the arc-shaped through groove, 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 arc-shaped rack, and the power of the drive motor causes the movable seat to move in the arc-shaped through groove, and a connecting shaft passing through the arc-shaped through groove is provided on the movable seat, the connecting shaft being rotatably connected to the movable sleeve.

[0015] The present invention is further configured such that: both the fixed sleeve and the movable sleeve 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 such that: the bonding layer has an opening, and a sealing film is provided on one side of the opening; the sealing film is wound at least once around the outside of the bonding layer, so as to form a seal by relying on the interlayer pressure and friction between the sealing films.

[0017] The invention is further configured such that: the detection patch is a flexible conductive sheet and is electrically connected to the control system via a wire; the detection patch is used to cooperate with the control system to detect leakage current.

[0018] The present invention further provides a method of using a cable testing device, wherein the cable testing device described above includes:

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

[0020] Step 2: Connect the plug at one end of the cable to be tested to the external power supply equipment, and 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, causing the cable to be tested to bend;

[0022] Step 4: Apply the adhesive layer tightly to the cable to be tested, so that the test patch is in close contact with the outer surface of the cable;

[0023] 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.

[0024] Step 6: Release the adhesive layer from the cable, and then control the movable sleeve to move and bend the cable to be tested in the other direction;

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

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

[0027] This invention incorporates an adhesive layer for cable testing between a fixed sleeve and a movable sleeve. During use, when the cable is bent, the adhesive layer adheres tightly to the cable surface via negative pressure adsorption. This, combined with a detection patch, allows for real-time monitoring of whether the insulation layer develops tiny cracks that could lead to leakage after bending. Compared to traditional methods, this method offers higher accuracy due to its adherence to the cable's outer surface. Furthermore, after the negative pressure is released, the adhesive layer recovers, and the cable can be bent in the opposite direction. The adhesive layer can then be subjected to negative pressure adsorption again for testing. Traditional methods cannot maintain adhesion during repeated bending, but this invention, relying on air pressure adsorption, allows for high-precision testing of the adhesive layer even during repeated bending. This effectively determines the cable's bending life. Combined with continuity testing of the cable socket and the internal cable harness, this provides a valuable data foundation for product quality inspection and subsequent product improvement. Attached Figure Description

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

[0029] Figure 2 This is a schematic diagram of an arc-shaped rack and pinion structure.

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

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

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

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

[0034] Figure 7 This is a schematic diagram of the connection.

[0035] Reference numerals: 1. Testing frame; 2. Cable socket; 4. Bending mechanism; 401. Fixed sleeve; 402. Movable sleeve; 403. Drive mechanism; 4001. Upper cover; 4002. Lower cover; 5. Electrical testing mechanism; 6. Connecting part; 7. Opening; 701. Sealing film; 8. Transition arc surface; 10. Insulation testing mechanism; 1001. Adhesive layer; 1002. Testing patch; 11. Cable; 12. Interface; 13. Arc-shaped through groove; 1301. Moving seat; 1302. Arc-shaped rack. Detailed Implementation

[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, the system includes a testing frame 1 and a cable socket 2 located on one side of the testing frame 1. 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. The external power supply device supplies power to the cable to be tested. 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 testing 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 mounted on the testing frame 1. The cable to be tested passes through the fixed sleeve 401 and the movable sleeve 402. The bottom of the movable sleeve 401 is provided with a driving mechanism 403, which drives the movable sleeve 402 to move to achieve bending of the cable to be tested. The bending of the cable to be tested 11 is achieved by setting a bending needle mechanism 4, wherein the fixed sleeve 401 is located in the middle and does not move, and the movable sleeve 402 is located on the outside to perform the bending action, so that the cable between the fixed sleeve 401 and the movable sleeve 402 is bent.

[0039] The electrical testing mechanism 5 includes a control system with a receiving module connected to the cable socket 2. The receiving module identifies the power signal of the input cable 11 of the external power supply equipment through the cable socket 2 and distinguishes the power data of different wire cores, thereby determining whether the wire bundle inside the cable under test is broken or short-circuited.

[0040] The insulation testing mechanism 10 includes an adhesive layer 1001 disposed between a fixed sleeve 401 and a movable sleeve 402 and covering the outer surface of the cable to be tested. The inner surface of the adhesive 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 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. (Refer to...) Figure 4 , Figure 4 The diagram illustrates a portion of the bonding layer 1001. Detection patches 1002 are spaced apart on the inner surface of the bonding layer 1001, with corresponding conductive lines extending from one side. The number of detection patches 1002 should completely surround the outer surface of the cable for accurate detection. Furthermore, the bonding layer 1001 is configured to adhere tightly to the surface of the cable 11 to be tested, thus ensuring that the detection patches 1002 also adhere well to the cable surface. Conductive adhesive patches can be used for the detection patches. The control system includes an insulation resistance tester, which identifies sudden drops in resistance value to determine if there are insulation problems.

[0041] Furthermore, the fixed sleeve 401 and the movable sleeve 402 are configured as hollow cylindrical structures, with transition arc surfaces 8 at both ends of the fixed sleeve 401 and the movable sleeve 402 for abutting the cable to be tested. Through the above structure, the solid sleeve 401 and the movable sleeve 402 provide support for 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, and sufficient slack needs to be left for the cable extending to the outside through the movable sleeve 402. This allows the cable to have a certain degree of movement when bending and deforming, ensuring smooth bending of the cable and avoiding jamming of the bending mechanism.

[0042] Furthermore, the bonding layer 1001 is a flexible film, which is stretchable along its length. The bonding layer 1001 also has an interface for generating negative pressure, which connects to an external solenoid valve and vacuum pump. Preferably, the bonding layer is in the form of a thin film or fabric, and the material can be flexible materials such as plastic or rubber. This allows it to adhere well to the outer surface contour of the cable when negative pressure is applied.

[0043] Furthermore, a connecting portion 6 is provided on the outer peripheral surface of the fixed sleeve 401 and the movable sleeve 402. The two ends of the bonding layer 1001 in the length direction are respectively sealed on the connecting portion 6 of the fixed sleeve and the movable sleeve. The connecting portion 6 can be set as a groove or a ridge, preferably a groove. It is only necessary to put the end face of the bonding layer 1001 into the groove and then insert a sealing strip into the groove to achieve a seal. The connecting portion 6 is completely wrapped around the outside of the sleeve.

[0044] Furthermore, to achieve a stable airtight seal, the fixed sleeve 401 and the movable sleeve 402 are equipped with removable sealing gaskets. These gaskets fill the gaps between the inner walls of the fixed and movable sleeves and the cable under test. Different specifications of sealing gaskets can be replaced according to the thickness of the cable under test. Using these gaskets effectively prevents air leakage between the sleeves and thinner cables during subsequent negative pressure application of the bonding layer, ensuring that the bonding layer remains stably and tightly adhered to the cable surface.

[0045] Furthermore, the drive mechanism 403 is specifically configured as follows: an arc-shaped through groove 13 is provided on the detection frame 1; an arc-shaped rack 1302 adjacent to the arc-shaped through groove 13 is provided on the detection frame 1; a movable seat 1301 that moves along the arc-shaped through groove 13 is provided in the arc-shaped through groove 13; a drive motor is provided on the movable seat 1301; the output shaft of the drive motor is connected to a reduction gearbox; the reduction gearbox is then connected to a gear meshing with the arc-shaped rack 1302; the power of the drive motor causes the gear to rotate, thereby allowing the gear to move along the arc-shaped rack 1302. The moving part 1302 moves and drives the moving seat to move within the arc-shaped through groove 13. The moving seat 1301 is provided with a connecting shaft passing through the arc-shaped through groove 13. A roller is provided in the middle of the connecting shaft. The roller rotates in the arc-shaped through groove 13 to assist the moving seat in moving. The end of the connecting shaft is rotatably connected to the movable sleeve 402, so that the movable sleeve 402 can move with the moving seat 1301 but can also rotate. In this way, when bending, the movable sleeve 402 can deflect according to the bending condition of the cable.

[0046] Furthermore, refer to Figure 3 Both the fixed sleeve 401 and the movable sleeve 402 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 is hinged, and the other end is detachably connected. The fixed sleeve 401 and the movable sleeve 402 can be opened through the above structure, which facilitates the installation of the cable to be tested. The detachable connection can be made by 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] Furthermore, refer to Figure 5 and Figure 6The bonding layer 1001 has 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 outside of the bonding layer 1001 to form a seal through interlayer pressure and friction between the sealing films 701. The sealing film 701 is made of a self-adhesive film material, such as the material of cling film. The film layers can adhere to each other through electrostatic adsorption. Thus, the sealing film 701 forms a seal after being wrapped once, ensuring no air leakage during subsequent negative pressure application. This structure makes it very convenient to install and remove the bonding layer 1001 without the need for an additional sealing structure. Furthermore, after negative pressure is formed, the film layers are tightened by the negative pressure, further improving the sealing effect. Therefore, the sealing effect is better after negative pressure is formed, greatly reducing the possibility of air leakage and making the detection of the detection patch more accurate.

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

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

[0050] Step 2: Connect the plug at one end of the cable to be tested to the external power supply equipment, and place the other end into the movable sleeve, fixed sleeve, and adhesive layer, and connect the plug at the end to the cable socket; by installing the cable through steps 1 and 2, the cable to be tested can be placed into the fixed sleeve, movable sleeve, and adhesive layer from the side, which is more convenient.

[0051] Step 3: Control the movable sleeve to move, causing the cable to be tested to bend. Specifically, by controlling the drive motor of the drive mechanism, which is set as a servo motor, the bending angle of the cable can be calculated by controlling the rotation angle, combined with the gear ratio and radius, so as to adjust and control the bending angle of the cable.

[0052] Step 4: Apply the adhesive layer tightly to the cable to be tested, so that the test patch is tightly attached to the outer surface of the cable. In this embodiment, the adhesive layer is preferably applied to the cable to be tested by negative pressure suction. The negative pressure suction method can perfectly adhere to the surface of the cable after bending, and the adhesive layer can be tightly attached no matter what angle it is bent at, so that the test patch has high detection accuracy and is convenient to use.

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

[0054] Step 6: Release the adhesive layer from the cable, and then control the movable sleeve to move and bend the cable to be tested in another direction; release the negative pressure, switch the solenoid valve to connect to the atmosphere, or directly fill with air to release the adhesive layer from the cable. This way, when bending the cable later, the adhesive layer will not be pulled 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. Then, subject the bent cable to negative pressure and repeatedly bend it until a fault occurs. This gives the cable's bending life. As can be seen from this method, 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 future cable technology improvements.

[0056] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present invention should be included within the protection scope 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 The bending mechanism (4) includes a fixed sleeve (401) and a movable sleeve (402) set on the testing frame (1). The cable to be tested passes through the fixed sleeve (401) and the movable sleeve (402). The bottom of the movable sleeve (401) is provided with a driving mechanism (403). The driving mechanism (403) drives the movable sleeve (402) to move to achieve bending of the cable to be tested. The electrical testing mechanism (5) includes a control system with a receiving module connected to a cable socket (2); The insulation testing mechanism (10) includes an adhesive layer (1001) disposed between a fixed sleeve (401) and a movable sleeve (402) and covering the outer surface of the cable to be tested. The inner surface of the adhesive layer (1001) is provided with a plurality of test patches (1002). The test patches (1002) are electrically connected to the control system. The fixed sleeve (401) and the movable sleeve (402) are provided with a connecting part (6) on their outer peripheral surfaces. The two ends of the bonding layer (1001) in the length direction are respectively sealed on the connecting part (6) of the fixed sleeve and the movable sleeve. The connecting part (6) is set as a groove. The end face of the bonding layer (1001) is placed into the groove, and then a sealing strip is inserted into the groove to achieve a seal. The connecting part (6) is wrapped around the outside of the sleeve. The fixed sleeve (401) and the movable sleeve (402) are provided with removable sealing gaskets, which are used to fill the gap between the inner wall of the fixed sleeve and the movable sleeve and the cable to be tested. The bonding 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 at least once around the outside of the bonding layer (1001) so as to form a seal by relying on the interlayer pressure and friction between the sealing films (701). The bonding layer (1001) is provided with an interface for generating negative pressure. The interface is connected to an external solenoid valve and a vacuum pump. During testing, the bonding layer is tightly attached to the cable to be tested by using negative pressure suction. When bending, the solenoid valve is switched to connect to the atmosphere, or air is directly injected to release the tightness between the bonding layer and the cable.

2. The 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 the two ends of the fixed sleeve (401) and the movable sleeve (402) are provided with transition arc surfaces (8) for abutting the incoming test cable.

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

4. The cable testing device according to claim 1, characterized in that: The testing frame (1) is provided with an arc-shaped through groove (13), and the testing frame (1) is provided with an arc-shaped rack (1302) adjacent to the arc-shaped through groove (13). A movable seat (1301) is provided in the arc-shaped through groove (13), and a drive motor is provided on the movable seat (1301). The output shaft of the drive motor is connected to a reduction gearbox, and the reduction gearbox is connected to a gear that meshes with the arc-shaped rack (1302). The power of the drive motor causes the movable seat to move in the arc-shaped through groove (13). A connecting shaft passing through the arc-shaped through groove (13) is provided on the movable seat (1301), and the connecting shaft is rotatably connected to the movable sleeve (402).

5. The cable testing device according to claim 1, characterized in that: Both the fixed sleeve (401) and the movable sleeve (402) 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.

6. 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 the control system through a wire. The detection patch (1002) is used to cooperate with the control system to detect leakage current.

7. A method of using a cable testing device, comprising using the cable testing device as described in any one of claims 1-6, characterized in that: include: Step 1: Set the movable sleeve and fixed sleeve of the bending mechanism on the same straight line, and then open the bonding layer of the movable sleeve, fixed sleeve and insulation detection mechanism; Step 2: Connect the plug at one end of the cable to be tested to the external power supply equipment, and 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, causing the cable to be tested to bend; Step 4: Apply the adhesive layer tightly to the cable to be tested, so that the test patch is in close contact with the outer surface of the cable; 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. Step 6: Release the adhesive layer from the cable, and then control the movable sleeve to move and bend the cable to be tested in the other direction; Step 7: Repeat steps 4-6 until the insulation or continuity of the cable under test fails, and record the number of bends.

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