A cable insulation detection device

Abstract

This utility model relates to the field of cable testing technology and discloses a cable insulation testing device, including upper and lower clamping rings. Support bolts are movably connected to both ends of the upper clamping ring. Conductive rings are installed on the inner sides of both clamping rings. Springs are fixed to the opposite surfaces of the two conductive rings. A docking mechanism is provided on the right end of the front surface of both conductive rings. This utility model, by adopting a separate upper and lower clamping ring and support bolt fastening connection method, achieves a highly integrated design while ensuring structural stability. The components are precisely matched and rationally arranged. The conductive ring assembly mechanism supported by built-in springs enables dynamic adaptation between the testing device and the cable surface. This not only ensures the stability and reliability of the detection signal acquisition but also effectively avoids mechanical damage such as indentations and scratches that may be caused to the cable sheath by traditional rigid testing tools through contact pressure.

Description

Technical Field

[0001] This utility model relates to the field of cable testing technology, specifically a cable insulation testing device. Background Technology

[0002] Cables typically consist of cable conductors and an insulating sheath. However, prolonged use can affect the insulation performance of cables, leading to reduced insulation and potentially causing serious leakage and electric shock accidents. Therefore, it is necessary to regularly test the insulation level of cables.

[0003] Patent document CN205982501U discloses a cable insulation testing device. The testing probe has a sleeve structure with an outer insulating layer and an inner metal wire layer. The metal wire layer is formed by twisting multiple strands of conductive metal wire together to form a cable testing channel. When the cable under test passes through the testing channel, it can be tested from all directions, eliminating blind spots and ensuring the accuracy of the test.

[0004] However, the above-mentioned cable insulation testing device, which uses a handheld testing device, is not only time-consuming and laborious, but also prone to electric shock.

[0005] A Chinese patent discloses a cable insulation testing device (authorization announcement number CN220961809U). This patented technology can automatically drive a metal ring to move back and forth on the cable, eliminating the need for manual hand-held testing; at the same time, it can clamp and straighten the cable, improving the efficiency of testing.

[0006] However, it has certain drawbacks: the metal ring is prone to hard friction with the cable surface due to rigid contact during the movement of the cable. In addition, the cable itself may have uneven surface, uneven insulation thickness, or protruding foreign objects, which further increases the risk of scratching between the metal ring and the cable surface. This mechanical hard contact may not only scratch the cable sheath and cause secondary damage, but may also lead to a decrease in the stability of the detection signal due to uneven contact pressure, which seriously affects the accuracy of the detection results and the safety of the cable. Utility Model Content

[0007] The purpose of this invention is to provide a cable insulation testing device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A cable insulation testing device includes two clamping rings, an upper one and an lower one. Support bolts are movably connected to both ends of the upper clamping ring. Conductive rings are installed on the inner sides of both clamping rings. Springs are fixed to the opposite side surfaces of the two conductive rings. Support rods are fixed to the opposite side surfaces of the two conductive rings on the left and right sides of the springs. Multiple conductive posts are fixed to the opposite side surfaces of the two conductive rings.

[0010] A docking mechanism is provided on the right end of the front surface of both conductive rings.

[0011] As a further embodiment of this utility model: the docking mechanism includes a docking rod, a docking block is fixedly connected to the lower end of the docking rod, and a docking post is movably sleeved on the outside of the docking rod. A wire is fixedly connected to the front surface of the docking post, and an insulating tube is fixedly connected to the front surface of the docking post outside the wire. A conical cylinder is fixedly sleeved on the lower outside of the insulating tube, and an extension cylinder is movably sleeved on the outside of the conical cylinder. An adjusting element is provided on the front surface of the conical cylinder and the extension cylinder.

[0012] As a further embodiment of this utility model: the adjusting component includes a screw sleeve, the inside of which is threadedly connected to a screw rod, and the lower end of the screw rod is rotatably connected to a support plate.

[0013] As a further embodiment of this utility model: the support bolt is threadedly connected to the lower clamping ring, the spring is fixed to the inner surface of the clamping ring, the support rod movably passes through the clamping ring, and the end of the conductive post is hemispherical.

[0014] As a further embodiment of this utility model: the docking block is fixed to the right end of the front surface of the lower conductive ring, the docking post is fixed to the right end of the front surface of the upper conductive ring, the threaded sleeve is fixed to the upper end of the front surface of the conical cylinder, and the support plate is fixed to the lower end of the front surface of the extension cylinder.

[0015] As a further embodiment of this utility model: a hand-held component is provided on the right side surface of the upper clamping ring. The hand-held component includes a fixing plate, and a fixing block and a handle are respectively fixed to the left and right ends of the fixing plate. The fixing block is fixed to the right side surface of the upper clamping ring.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model adopts a split upper and lower clamping ring and support bolt fastening connection method, which enables the overall device to achieve a high degree of integration design while ensuring structural stability. The components are precisely matched and reasonably arranged, showing significant structural compactness and light weight, which greatly facilitates the operator to carry and quickly install in various complex field environments.

[0018] Meanwhile, by utilizing the conductive ring assembly mechanism supported by built-in springs, the dynamic adaptation function between the detection device and the cable surface is realized. This allows multiple hemispherical conductive posts to automatically adjust their contact posture according to changes in the cable's outer diameter, generating adaptive elastic contact with the cable surface contour. This not only ensures the stability and reliability of the detection signal acquisition, but also effectively avoids mechanical damage such as indentations and scratches that traditional rigid detection tools may cause to the cable sheath through contact pressure. This truly achieves comprehensive protection of the cable body while efficiently completing the detection task.

[0019] In addition, the device further enhances operational safety and ease of testing through an adjustable wire protection mechanism and handheld component design. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a cable insulation testing device;

[0021] Figure 2 This is a schematic diagram from the right side of a cable insulation testing device.

[0022] Figure 3 This is a schematic diagram of the docking mechanism in a cable insulation testing device.

[0023] Figure 4 This is a cross-sectional view of the docking mechanism in a cable insulation testing device;

[0024] Figure 5 This is a simplified schematic diagram of the actual use of a cable insulation testing device.

[0025] In the diagram: 1. Clamping ring; 2. Support bolt; 3. Conductive ring; 4. Spring; 5. Support rod; 6. Conductive post; 7. Docking mechanism; 8. Docking rod; 9. Docking block; 10. Docking post; 11. Wire; 12. Insulating tube; 13. Conical tube; 14. Extension tube; 15. Adjusting component; 16. Screw sleeve; 17. Screw; 18. Support plate; 19. Handheld component; 20. Fixing plate; 21. Fixing block; 22. Handle. Detailed Implementation

[0026] Please see Figure 1 In this embodiment of the utility model, a cable insulation testing device includes two clamping rings 1, one above the other; the clamping rings 1 are semi-circular.

[0027] Both ends of the upper clamping ring 1 are movably connected to the support bolts 2, and the support bolts 2 are threadedly connected to the lower clamping ring 1. Conductive rings 3 are installed on the inner side of both clamping rings 1. The conductive rings 3 are semi-circular and are used to fit around the outside of the cable being tested.

[0028] Springs 4 are fixed to the opposite sides of the two conductive rings 3. The springs 4 are fixed to the inner surface of the clamping ring 1. Threaded holes are opened on the clamping ring 1 and the conductive ring 3. The end of the spring 4 is limited and fixed by the screw plug, so that the spring 4 can be disassembled and replaced. The spring 4 allows the conductive ring 3 to generate radial displacement when it moves outside the cable, and always provides uniform elastic pressure, avoiding the cable outer sheath indentation or even damage that may be caused by rigid clamping.

[0029] Support rods 5 are fixedly attached to the opposite sides of the two conductive rings 3 on both sides of the spring 4. The support rods 5 movably pass through the clamping ring 1. Multiple conductive posts 6 are fixedly attached to the opposite sides of the two conductive rings 3. The ends of the conductive posts 6 are hemispherical. The conductive posts 6 reduce the contact friction between the conductive rings 3 and the cable, further protecting the cable.

[0030] The clamping ring 1 and the support rod 5 are components made of insulating material, while the conductive ring 3 and the conductive post 6 are components made of conductive material.

[0031] exist Figure 1 , Figure 3 and Figure 4 In the middle: the two conductive rings 3 are provided with a docking mechanism 7 on the right end of their front surfaces. The docking mechanism 7 includes a docking rod 8. The lower end of the docking rod 8 is fixedly connected to a docking block 9. The docking block 9 is fixedly connected to the right end of the front surface of the lower conductive ring 3. A docking post 10 is movably sleeved on the outside of the docking rod 8. The docking post 10 is fixedly connected to the right end of the front surface of the upper conductive ring 3. A wire 11 is fixedly connected to the front surface of the docking post 10, and an insulating tube 12 is fixedly connected to the front surface of the docking post 10 outside the wire 11.

[0032] The free end of conductor 11 can be soldered with a standard banana plug or alligator clip for quick connection to external testing equipment, such as megohmmeter, multimeter, leakage current detector, and the test leads, to detect whether there is damage to the cable surface that causes leakage.

[0033] The connecting rod 8, connecting block 9, connecting post 10, and wire 11 are all conductive components; the insulating tube 12 is an insulating component.

[0034] When the two conductive rings 3 are placed on the outside of the cable and move, they are prone to relative displacement due to factors such as bulges and unevenness of the cable sheath. The lower clamping ring 1 is integrated with the docking block 9, and the upper clamping ring 1 is integrated with the docking post 10. In this way, while maintaining relative movement, the current can be kept flowing, avoiding the phenomenon of missed detection due to open circuit.

[0035] exist Figure 3 and Figure 4In the middle: a tapered cylinder 13 is fixedly sleeved on the lower outer end of the insulating tube 12, and an extension cylinder 14 is movably sleeved on the outside of the tapered cylinder 13; both the tapered cylinder 13 and the extension cylinder 14 are components made of insulating material, with the small end of the tapered cylinder 13 facing upward;

[0036] An adjusting member 15 is provided on the front surfaces of the conical cylinder 13 and the extension cylinder 14. The adjusting member 15 includes a screw sleeve 16, which is fixed to the upper end of the front surface of the conical cylinder 13. A screw rod 17 is threaded through the inside of the screw sleeve 16. A support plate 18 is rotatably connected to the lower end of the screw rod 17, which is fixed to the lower end of the front surface of the extension cylinder 14. The screw rod 17 and the support plate 18 can be rotatably connected by a bearing. The lower end of the wire 11 protrudes from the conical cylinder 13, which facilitates the connection between the wire 11 and the testing equipment. After rotating the screw rod 17 to drive the extension cylinder 14 to the lowest point, the connection between the wire 11 and the testing equipment can be blocked, preventing the operator or surrounding objects from accidentally touching the live connection point during the testing process, thus eliminating the risk of short circuit and electric shock.

[0037] exist Figure 2 In the middle: A handheld component 19 is provided on the right side surface of the upper clamping ring 1. The handheld component 19 includes a fixing plate 20. Fixing blocks 21 and handles 22 are respectively fixed to the left and right ends of the fixing plate 20. The fixing blocks 21 are fixed to the right side surface of the upper clamping ring 1. The fixing blocks 21 and the upper clamping ring 1 can be fixed with bolts. The handheld component 19 is an insulating component. The handheld component 19 makes it easy for the operator to hold the device for testing.

[0038] Furthermore, such as Figure 5 As shown, in order to achieve blind spot detection of cable insulation defects and avoid missed detection due to uneven distribution of contact points of conductive post 6, a dual-device collaborative detection method is adopted: two detection devices with identical structures are used. During detection, the first device is installed in the conventional manner with the closing surfaces of its two clamping rings 1 in the vertical direction. At the same time, the second device is installed with its closing surfaces of clamping rings 1 rotated 90° relative to the first device, that is, its closing surfaces are in the front-back direction.

[0039] The working principle of this utility model is as follows: During operation, the detection device is first placed on the outside of the cable to be tested through the upper and lower clamping rings 1, and the device is fixed on the cable by tightening the support bolt 2. During this process, due to the elastic buffering effect of the spring 4, the conductive ring 3 can generate adaptive radial displacement, so that the multiple conductive posts 6 distributed on the conductive ring 3 are tightly attached to the cable surface with uniform contact pressure, which not only ensures good electrical contact, but also avoids damage to the cable insulation sheath due to excessive pressure.

[0040] After the device is installed, connect the detection terminal of the external detection equipment to the wire 11 led out from the lower end of the conical cylinder 13 to ensure the stability of signal transmission. Then rotate the screw 17 of the adjusting component 15 to move the extension cylinder 14 downward through the thread drive until the connection between the wire 11 and the detection equipment is completely blocked, effectively preventing accidental contact with live connection points during operation and causing safety accidents.

[0041] Finally, the cable under test is energized to put it into working condition. The operator holds the device steady with the handheld component 19 and begins the testing work. When there is insulation damage on the surface of the cable, the resulting leakage signal will be collected by multiple conductive posts 6, converged through conductive ring 3, and transmitted to the conductor 11 through the docking mechanism 7. Finally, the test results are accurately displayed by the external testing equipment, thereby realizing a rapid and accurate judgment of the insulation status of the cable.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A cable insulation testing device, characterized in that, It includes two clamping rings (1) at the top and bottom. Support bolts (2) are movably connected to both ends of the upper clamping ring (1). Conductive rings (3) are installed on the inner side of both clamping rings (1). Springs (4) are fixed to the opposite side surfaces of the two conductive rings (3). Support rods (5) are fixed to the opposite side surfaces of the two conductive rings (3) on the left and right sides of the springs (4). Multiple conductive posts (6) are fixed to the opposite side surfaces of the two conductive rings (3). The two conductive rings (3) are provided with a docking mechanism (7) on the right end of their front surfaces.

2. The cable insulation testing device according to claim 1, characterized in that, The docking mechanism (7) includes a docking rod (8), a docking block (9) is fixedly connected to the lower end of the docking rod (8), and a docking post (10) is movably sleeved on the outside of the docking rod (8). A wire (11) is fixedly connected to the front surface of the docking post (10), and an insulating tube (12) is fixedly connected to the front surface of the docking post (10) outside the wire (11). A conical cylinder (13) is fixedly sleeved on the lower outside of the insulating tube (12), and an extension cylinder (14) is movably sleeved on the outside of the conical cylinder (13). An adjusting member (15) is provided on the front surface of the conical cylinder (13) and the extension cylinder (14).

3. The cable insulation testing device according to claim 2, characterized in that, The adjusting component (15) includes a screw sleeve (16), and a screw rod (17) is threaded through the inside of the screw sleeve (16). A support plate (18) is rotatably connected to the lower end of the screw rod (17).

4. The cable insulation testing device according to claim 1, characterized in that, The support bolt (2) is threadedly connected to the lower clamping ring (1), the spring (4) is fixed to the inner surface of the clamping ring (1), the support rod (5) moves through the clamping ring (1), and the end of the conductive post (6) is hemispherical.

5. A cable insulation testing device according to claim 3, characterized in that, The docking block (9) is fixed to the right end of the front surface of the lower conductive ring (3), the docking post (10) is fixed to the right end of the front surface of the upper conductive ring (3), the screw sleeve (16) is fixed to the upper end of the front surface of the conical cylinder (13), and the support plate (18) is fixed to the lower end of the front surface of the extension cylinder (14).

6. The cable insulation testing device according to claim 1, characterized in that, A handheld component (19) is provided on the right side surface of the upper clamping ring (1). The handheld component (19) includes a fixing plate (20). A fixing block (21) and a handle (22) are respectively fixed to the left and right ends of the fixing plate (20). The fixing block (21) is fixed to the right side surface of the upper clamping ring (1).

Images