Nondestructive testing equipment for internal defects of main insulation of power cable

Abstract

The utility model relates to power cable detection equipment, in particular to nondestructive detection equipment for internal defects of main insulation of a power cable, which comprises a 90-degree notch annular detection frame, two pairs of detection components symmetrically arranged along the circumference of the 90-degree notch annular detection frame, an X-ray source emitter and a detector, and the X-ray source emitter and the detector form an angle of 180 degrees and face the axis. Arc-shaped guide rails are arranged on two sides of the detection frame, and the bottom of the detection frame is arranged on the base through a mounting seat which comprises a driving device. The base is provided with a controller which is electrically connected with all parts. And a fastening part is also arranged and consists of a semicircular fixing ring, so that the cable is ensured to be in a horizontal and tensile state and is coaxial with the detection frame. The two pairs of detection assemblies form a 90-degree included angle, and the X-ray source emitters are arranged at the two ends of the notch of the detection frame. The equipment can accurately detect cable defects, and is flexible in operation, reliable in fixation and high in detection efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of power cable detection equipment, in particular to a non-destructive detection device for internal defects of main insulation of a power cable. Background Art

[0002] With the expansion of power systems and the increasing complexity of cable layouts, the requirements for power cable inspection are becoming increasingly complex. This is especially true in confined spaces and complex working environments, where cables are tightly packed. Traditional inspection equipment, due to its bulk and complex operation, struggles to effectively detect internal defects. Furthermore, existing inspection methods struggle to achieve efficient and accurate multi-angle imaging in environments with closely spaced cables, and inspection results are often limited by the flexibility and mobility of the inspection equipment. Therefore, there is an urgent need for equipment capable of performing nondestructive testing for internal defects in the primary insulation layer of cables in confined spaces and complex working environments. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a non-destructive testing device for power cables that can work efficiently in small spaces and complex working environments and achieve multi-angle imaging through a simple motion trajectory. It is suitable for testing sites with small cable spacing and adopts the following technical solutions:

[0004] A nondestructive testing device for internal defects in the main insulation of a power cable comprises a testing frame, the testing frame being an annular frame with a 90-degree notch, with two pairs of testing assemblies symmetrically arranged along the circumference of the annular frame, each pair of testing assemblies comprising an X-ray source emitter and a corresponding detector, the X-ray source emitter and the corresponding detector being arranged on the annular frame at 180 degrees, with the emission direction of the X-ray source emitter and the receiving surface of the detector both oriented toward the axis of the testing frame;

[0005] A first arc-shaped guide rail and a second arc-shaped guide rail are respectively provided on both sides of the detection frame, and a rack is provided inside the first arc-shaped guide rail;

[0006] A base is provided at the bottom of the detection frame, and the detection frame is mounted on the base through a mounting seat, the mounting seat includes a first mounting seat and a second mounting seat, which are respectively provided on both sides of the bottom of the detection frame, the first mounting seat is provided with a driving device, the driving device includes a gear located on the side of the first mounting seat close to the detection frame, the gear is inside the first arc-shaped guide rail and meshes with the rack, a driving motor is provided on the other side of the first mounting seat, the output shaft of the driving motor passes through the first mounting seat and is fixedly connected to the gear, and a roller is provided on the side of the second mounting seat close to the detection frame, and the roller is located on the inner side of the second arc-shaped guide rail;

[0007] The base is provided with a controller, which is electrically connected to the X-ray source emitter, the detector and the drive motor.

[0008] Furthermore, the device further comprises a fastening component, which is used to fix the power cable to be tested so that the power cable to be tested can be kept in a horizontal and stretched state in the axial direction of the detection frame.

[0009] Furthermore, the fastening components are arranged on both axial sides of the detection frame, and each fastening component is composed of a pair of semicircular fixing rings. The two fixing rings are connected by bolts and are used to clamp the power cable to be tested. The fixing rings are fixed on the base through a bracket.

[0010] Furthermore, the circle formed by the combination of the two fixing rings and the annular structure of the detection frame have the same axis.

[0011] Furthermore, the two pairs of X-ray source emitters are at an angle of 90 degrees to the detector.

[0012] Furthermore, the X-ray source emitters are arranged at both ends of the gap of the detection frame.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model provides an annular detection frame with a 90-degree notch and symmetrically arranges two pairs of detection components in the circumferential direction of the frame. The X-ray source emitter and the corresponding detector are arranged at 180 degrees, and the emission direction and receiving surface are both oriented towards the axis of the detection frame. This achieves accurate detection of internal defects in the main insulation of power cables, ensures that X-rays penetrate and are received by the detector at the optimal angle, and greatly improves detection accuracy.

[0015] 2. The utility model realizes flexible movement and position adjustment of the detection frame by arranging the first arc guide rail and the second arc guide rail on both sides of the detection frame, arranging the gear and the drive motor that mesh with the rack inside the first arc guide rail on the first mounting seat, and arranging the roller located on the inner side of the second arc guide rail on the second mounting seat, thereby adapting to the detection needs of power cables of different sizes and improving the operational flexibility of the equipment.

[0016] 3. The utility model provides a fastening component consisting of a pair of semicircular fixing rings on both sides of the axial direction of the detection frame. The fixing rings are connected by bolts to clamp the power cable to be tested and are fixed to the base through a bracket. The circle formed by the combination of the two fixing rings has the same axis as the annular structure of the detection frame, thereby achieving reliable fixation of the power cable to be tested, keeping it horizontal and stretched in the axial direction of the detection frame, preventing the cable from shaking or displacing during the detection process, and further improving the accuracy and reliability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric view of an embodiment of the utility model;

[0018] Figure 2It is a side view of an embodiment of the utility model;

[0019] Figure 3 yes Figure 2 Middle AA section view;

[0020] Figure 4 is a schematic diagram of a fastening component in an embodiment of the present utility model;

[0021] Figure 5 It is a side view of the fastening component in the embodiment of the present utility model.

[0022] The accompanying drawings are numerals: 1. detection frame; 2. X-ray source emitter; 3. detector; 4. first arc guide rail; 5. base; 6. first mounting seat; 7. second mounting seat; 8. gear; 9. drive motor; 10. roller; 11. controller; 12. fixing ring; 13. power cable; 14. bracket. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technology in the embodiments of the present invention; it is obvious that the embodiments described are only part of the embodiments of the present invention, not all of the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative work should fall within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0024] Reference Figures 1 to 5 This embodiment provides a nondestructive testing device for internal defects in the main insulation of a power cable, comprising a testing frame 1. The testing frame 1 is a ring frame with a 90-degree notch. Two pairs of testing components are symmetrically arranged along the circumference of the ring frame. Each pair of testing components includes an X-ray source emitter 2 and a corresponding detector 3. The X-ray source emitter 2 and the corresponding detector 3 are arranged on the ring frame at 180 degrees. The emission direction of the X-ray source emitter 2 and the receiving surface of the detector 3 are both oriented toward the axis of the testing frame 1.

[0025] A first arc-shaped guide rail 4 and a second arc-shaped guide rail are respectively provided on both sides of the detection frame 1, and a rack is provided inside the first arc-shaped guide rail 4;

[0026] A base 5 is provided at the bottom of the detection frame 1, and the detection frame 1 is mounted on the base 5 through a mounting seat. The mounting seat includes a first mounting seat 6 and a second mounting seat 7, which are respectively provided on both sides of the bottom of the detection frame 1. The first mounting seat 6 is provided with a driving device, and the driving device includes a gear 8 located on the side of the first mounting seat close to the detection frame. The gear 8 is inside the first arc-shaped guide rail 4 and meshes with the rack. A driving motor 9 is provided on the other side of the first mounting seat, and the output shaft of the driving motor 9 passes through the first mounting seat 6 and is fixedly connected to the gear 8. A roller shaft 10 is provided on the side of the second mounting seat 6 close to the detection frame 1, and the roller shaft 10 is located on the inner side of the second arc-shaped guide rail;

[0027] The base 5 is provided with a controller 11 , which is electrically connected to the X-ray source emitter 2 , the detector 3 , and the drive motor 9 .

[0028] A second arc-shaped guide rail is provided on the back of the detection frame 1, and a roller shaft 10 is installed on the inner side of the mounting seat. The roller shaft 10 contacts the second arc-shaped guide rail and forms a symmetrical structure with the gear drive on the other side to ensure that the detection frame is stable and symmetrical during rotation.

[0029] Reference Figure 4 The device also includes a fastening component, which is used to fix the power cable to be tested so that the power cable to be tested 13 can maintain a horizontal and stretched state in the axial direction of the detection frame.

[0030] Specifically, the fastening components are arranged on both axial sides of the detection frame 1, and each fastening component is composed of a pair of semicircular fixing rings 12. The two fixing rings 12 are connected by bolts and are used to clamp the power cable 13 to be tested. The fixing rings 12 are fixed on the base 5 through the bracket 14.

[0031] Reference Figure 5 The circle formed by the two fixing rings 12 and the annular structure of the detection frame 1 have the same axis.

[0032] Preferably, the two pairs of X-ray source emitters 2 and the detectors 3 form an angle of 90 degrees.

[0033] Preferably, the X-ray source emitters 2 are arranged at both ends of the notch of the detection frame 1 .

[0034] The working principle of this embodiment is as follows:

[0035] First, the power cable 13 to be tested is placed in the center of the test frame 1. A pair of semicircular retaining rings 12, located on either side of the frame, securely clamp the cable 13. Because the circular shape formed by the two retaining rings 12 aligns with the annular structure of the test frame 1, the cable 13 remains horizontal and stretched axially within the frame, ensuring stable conditions for subsequent, accurate testing.

[0036] The detection frame 1 is a circular frame with a 90-degree notch, and two pairs of detection components are symmetrically arranged along its circumference. Each pair of detection components includes an X-ray source emitter 2 and a corresponding detector 3. The X-ray source emitter 2 emits X-rays. Because its emission direction is aligned with the axis of the detection frame 1, the X-rays can penetrate the main insulation of the power cable 13 under test, located at the center. The receiving surface of the detector 3 also faces the axis of the detection frame 1, accurately receiving the X-rays after they pass through the main insulation of the power cable 13.

[0037] A base 5 is provided at the bottom of the detection frame 1, and the detection frame 1 is mounted on the base via a mounting seat. The first mounting seat 6 is provided with a driving device, including a gear 8 located on one side close to the detection frame, which meshes with the rack inside the first curved guide rail 6. When the drive motor 9 on the other side of the first mounting seat 6 is in operation, its output shaft drives the gear 8 to rotate, allowing the detection frame 1 to move along the curved guide rail 7, thereby adjusting the detection position to meet the detection requirements of power cables of different specifications. A roller shaft 10 is provided on the side of the second mounting seat close to the detection frame. The roller shaft 10 is located on the inner side of the second curved guide rail and serves to auxiliary support and guide the movement of the detection frame 1.

[0038] The controller 11 on the base 5 is connected to the X-ray source 2, detector 3, and drive motor 9 and is responsible for controlling the entire detection process. The controller 11 adjusts the X-ray source 2's emission intensity and frequency, receives detection signals from the detector 3, and processes and analyzes them to determine whether defects exist within the power cable's main insulation, as well as the specific location and nature of the defects.

[0039] The two pairs of detection components are at a 90-degree angle, and the X-ray source emitters 2 in the two pairs of detection components are set at both ends of the gap in the detection frame, which can simultaneously detect the main insulation of the power cable from multiple angles, thereby improving the comprehensiveness and accuracy of the detection.

Claims

1. A non-destructive testing device for internal defects of the main insulation of a power cable, characterized in that: The device includes a detection frame, which is a ring frame with a 90-degree notch. Two pairs of detection components are symmetrically arranged along the circumference of the ring frame. Each pair of detection components includes an X-ray source emitter and a corresponding detector. The X-ray source emitter and the corresponding detector are arranged on the ring frame at 180 degrees. The emission direction of the X-ray source emitter and the receiving surface of the detector are both oriented toward the axis of the detection frame. A first arc-shaped guide rail and a second arc-shaped guide rail are respectively provided on both sides of the detection frame, and a rack is provided inside the first arc-shaped guide rail; A base is provided at the bottom of the detection frame, and the detection frame is mounted on the base through a mounting seat, the mounting seat includes a first mounting seat and a second mounting seat, which are respectively provided on both sides of the bottom of the detection frame, the first mounting seat is provided with a driving device, the driving device includes a gear located on the side of the first mounting seat close to the detection frame, the gear is inside the first arc-shaped guide rail and meshes with the rack, a driving motor is provided on the other side of the first mounting seat, the output shaft of the driving motor passes through the first mounting seat and is fixedly connected to the gear, and a roller is provided on the side of the second mounting seat close to the detection frame, and the roller is located on the inner side of the second arc-shaped guide rail; The base is provided with a controller, which is electrically connected to the X-ray source emitter, the detector and the drive motor.

2. The non-destructive testing equipment for internal defects of the main insulation of a power cable according to claim 1, characterized in that: The device further comprises a fastening component, which is used to fix the power cable to be tested so that the power cable to be tested can be kept in a horizontal and stretched state in the axial direction of the detection frame.

3. The non-destructive testing equipment for internal defects of the main insulation of a power cable according to claim 2, characterized in that: The fastening components are arranged on both axial sides of the detection frame. Each fastening component consists of a pair of semicircular fixing rings. The two fixing rings are connected by bolts and are used to clamp the power cable to be tested. The fixing rings are fixed on the base through brackets.

4. The non-destructive testing equipment for internal defects of the main insulation of a power cable according to claim 3, characterized in that: The circle formed by the combination of the two fixing rings has the same axis as the annular structure of the detection frame.

5. The non-destructive testing equipment for internal defects of the main insulation of a power cable according to claim 1, characterized in that: There is a 90-degree angle between the two pairs of detection components.

6. The non-destructive testing equipment for internal defects of the main insulation of a power cable according to claim 4, characterized in that: The X-ray source emitters in the two pairs of detection components are arranged at both ends of the gap of the detection frame.

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