A high voltage cable online quality inspection device and inspection method

Abstract

The present invention discloses an online quality inspection device and method for high-voltage cables, and relates to the technical field of power cable inspection. In the present invention: the horizontal inspection component includes a first azimuth servo motor, a first X-ray source connected to the first azimuth servo motor, and a first detection receiver. The vertical inspection component includes a second azimuth servo motor, a second X-ray source connected to the second azimuth servo motor, and a second detection receiver. The present invention adjusts the displacement range of the first X-ray source and the second X-ray source according to the specific high-voltage cable position, radial dimension parameters, internal metal cable parameters, etc., and analyzes and regulates the movement time interval of the second X-ray source relative to the first X-ray source, and cooperates with the first X-ray source to complete a more comprehensive and dynamic inspection operation on the high-voltage cable. The present invention improves the detection duty ratio of the metal conductor area of ​​the high-voltage cable, and greatly reduces the detection blind spots of the metal conductor area of ​​the high-voltage cable.

Description

Technical Field

[0001] The present invention relates to the technical field of power cable inspection, and in particular to an online quality inspection device and an inspection method for high-voltage cables. Background Art

[0002] High-voltage cables are important carriers and tools for transmitting electricity in today's society. The quality of high-voltage cables is an important basis that affects the efficiency of power transmission. Only when high-quality high-voltage cables are applied to power infrastructure can the efficient and stable operation of power infrastructure be guaranteed.

[0003] After the high-voltage cable manufacturing process is completed, all produced high-voltage cables need to be quality inspected.

[0004] Traditional inspection methods generally directly inspect the damage on the surface of the high-voltage cable or the conductivity between the two ends of the high-voltage cable. These traditional inspection methods are difficult to detect abnormalities inside the high-voltage cable.

[0005] Others use X-rays and other methods to directly scan the internal conditions of high-voltage cables. However, during the direct scanning process, the high-voltage cables are in continuous and uniform movement. When the position of a single ray source is fixed, the information detected along a single direction cannot fully and accurately reflect the entire cross-sectional information of the high-voltage cables.

[0006] In addition, the metal wires in the high-voltage cables shield the X-rays, and when the X-rays pass through the metal wires, the X-rays will be attenuated accordingly. Since the cable also needs to move at a constant speed during the X-ray reciprocating scanning process, there is a long unscanned interval period in the X-ray scanning of the metal wire area, resulting in a long blind area for the X-ray scanning of the metal wire. When there is a slight abnormality in the metal wire area of ​​the high-voltage cable, the existence of the scanning blind area will make it impossible to detect the abnormality in the metal wire area, affecting the efficient and accurate inspection results of the high-voltage cable.

[0007] In summary, how to conduct a more comprehensive X-ray inspection on the constantly moving high-voltage cables has become a problem that needs to be solved. Summary of the invention

[0008] In order to solve the above technical problems, the present invention provides an online quality inspection device and method for high-voltage cables, thereby realizing a more comprehensive X-ray inspection of high-voltage cables in a moving state.

[0009] The present invention is achieved through the following technical solutions:

[0010] The present invention provides an online quality inspection device for high-voltage cables, the inspection device comprising a horizontal inspection component and a vertical inspection component for inspecting high-voltage cables. The horizontal inspection component comprises a first azimuth servo motor, a first X-ray source and a first detection receiver driven and connected to the first azimuth servo motor, wherein the first X-ray source and the first detection receiver are relatively arranged and fixedly connected to the same fixed structure. The vertical inspection component comprises a second azimuth servo motor, a second X-ray source and a second detection receiver driven and connected to the second azimuth servo motor, wherein the second X-ray source and the second detection receiver are relatively arranged and fixedly connected to the same fixed structure. The direction in which the first azimuth servo motor drives the first X-ray source to move is perpendicular to the direction in which the second azimuth servo motor drives the second X-ray source to move.

[0011] As a preferred technical solution of the inspection device of the present invention: the transverse inspection component is further configured with a first reducer, the first reducer is connected to the output end of the first azimuth servo motor, and the output end of the first reducer is fixedly connected to the first screw rod. The transverse inspection component is also configured with a first displacement frame for fixedly mounting the first X-ray source, the first displacement frame is fixedly connected to the first synchronous support plate, and the first detection receiver is fixedly connected to the first synchronous support plate.

[0012] As a preferred technical solution of the inspection device of the present invention: the first X-ray source is provided with a first azimuth irradiation port facing the high-voltage cable, and the X-ray receiving surface of the first detection receiver is opposite to the first azimuth irradiation port.

[0013] As a preferred technical solution of the inspection device of the present invention: the vertical inspection component is further configured with a second reducer, the second reducer is connected to the output end of the second azimuth servo motor, and the output end of the second reducer is fixedly connected to the second screw rod. The vertical inspection component is also configured with a second displacement frame for fixedly mounting a second X-ray source, the second displacement frame is fixedly connected to the second synchronous support plate, and the second detection receiver is fixedly connected to the second synchronous support plate.

[0014] As a preferred technical solution of the inspection device of the present invention: the second X-ray source is provided with a second azimuth irradiation port facing the high-voltage cable, and the X-ray receiving surface of the second detection receiver is opposite to the second azimuth irradiation port.

[0015] As a preferred technical solution of the inspection device of the present invention: the position where the first X-ray source detects the high-voltage cable is located upstream of the position where the second X-ray source detects the high-voltage cable.

[0016] As a preferred technical solution of the inspection device of the present invention: the moving direction of the first X-ray source, the moving direction of the second X-ray source and the moving direction of the high-voltage cable are perpendicular to each other.

[0017] The present invention provides a high-voltage cable online quality inspection method, comprising the following contents:

[0018] S1. According to the diameter of the high-voltage cable and the position of the high-voltage cable through the inspection equipment, adjust the displacement range of the first azimuth servo motor to drive the first X-ray source [L 折点1 , L 折点2 ], debug the displacement range of the second X-ray source driven by the second azimuth servo motor [L 折点3 , L 折点4 ].

[0019] S2. According to the radial distribution position of the metal conductor area of ​​the high-voltage cable in the high-voltage cable, determine the displacement range of the first X-ray source irradiating the metal conductor area [L 金属1 , L 金属2 ], determine the displacement range of the second X-ray source irradiating the metal wire area [L 金属3 , L 金属4 ].

[0020] S3. The high-voltage cable passes through the inspection equipment and starts to move at a constant speed. The first azimuth servo motor starts, driving the first X-ray source to move at a constant speed. 折点1 , L 折点2 ]The displacement range makes reciprocating motion.

[0021] S4. During the movement of the first X-ray source: when the real-time moving position point L x1 ∈[L 折点1 , L 金属1 ) or L x1 ∈(L 金属2 , L 折点2 ], the moving speed of the first X-ray source is the first moving speed V preset by the system 1 When the real-time moving position point L x1 ∈[L 金属1 , L 金属2 ], the moving speed of the first X-ray source is the second moving speed V preset by the system 2 , where V 1 ≥2V 2 .

[0022] S5. Assume that the distance between the position where the first X-ray source detects the high-voltage cable and the position where the second X-ray source detects the high-voltage cable is L c , assuming that the moving speed of the high-voltage cable is V. The time taken for any position point G of the high-voltage cable to reach the position where the first X-ray source detects the high-voltage cable is: T c =L c / V. The first X-ray source is from L 折点1 Move the position point to L 金属1 The time taken for the location point is: T 1 =︳L 金属1-L 折点1 ︳ / V 1 .

[0023] S6. Time interval T c +2T 1 After that, the second azimuth servo motor starts, driving the second X-ray source according to [L 折点3 , L 折点4 ]The displacement range makes reciprocating motion.

[0024] S7. During the movement of the second X-ray source: when the real-time moving position point L x2 ∈[L 折点3 , L 金属3 ) or L x2 ∈(L 金属4 , L 折点4 ], the moving speed of the second X-ray source is the first moving speed V preset by the system 1 When the real-time moving position point L x1 ∈[L 金属1 , L 金属2 ], the moving speed of the second X-ray source is the second moving speed V preset by the system 2 .

[0025] S8. Follow the steps S3 to S7.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention configures two groups of ray sources, one group of ray sources moves back and forth vertically, and the other group of ray sources moves back and forth horizontally. According to the specific high-voltage cable position, radial dimension parameters, internal metal cable parameters, etc., the displacement range of the first X-ray source and the second X-ray source is adjusted, and by analyzing and regulating the movement time interval of the second X-ray source relative to the first X-ray source, the first X-ray source is cooperated to complete a more comprehensive and dynamic inspection operation on the high-voltage cable.

[0028] 2. The present invention reduces the moving speed of the first X-ray source and the second X-ray source when detecting the metal conductor area of ​​the high-voltage cable, and increases the moving speed of the first X-ray source and the second X-ray source when detecting the non-metallic conductor area of ​​the high-voltage cable, thereby greatly improving the detection duty cycle of the metal conductor area of ​​the high-voltage cable and greatly reducing the detection blind spots of the metal conductor area of ​​the high-voltage cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the high voltage cable inspection device in the present invention Figure 1 .

[0030] Figure 2 Schematic diagram of the high voltage cable inspection device in the present invention Figure 2 .

[0031] Figure 3 Schematic diagram of the high voltage cable inspection device in the present invention Figure 3 .

[0032] Figure 4 Schematic diagram of the high voltage cable inspection device in the present invention Figure 4 .

[0033] Figure 5 It is a schematic diagram of the relative movement between the first X-ray source and the high-voltage cable in the present invention.

[0034] Figure 6 It is a schematic diagram of the relative movement between the second X-ray source and the high-voltage cable in the present invention.

[0035] Among them: 1-high voltage cable, 101-cable insulation area, 102-metal conductor area; 2-first position servo motor; 3-first reducer; 4-first screw rod; 5-first displacement frame, 501-first synchronous support plate; 6-first X-ray source, 601-first position irradiation port; 7-first detection receiver; 8-second position servo motor; 9-second reducer; 10-second screw rod; 11-second displacement frame, 1101-second synchronous support plate; 12-second X-ray source, 1201-second position Irradiation port; 13-second detection receiver; M1-displacement path of the first X-ray source (relative to the high-voltage cable); M2-displacement path of the second X-ray source (relative to the high-voltage cable); K11, K13-displacement path of the first X-ray source in the non-metallic wire area of ​​the high-voltage cable, K12-displacement path of the first X-ray source in the metal wire area of ​​the high-voltage cable; K21, K23-displacement path of the second X-ray source in the non-metallic wire area of ​​the high-voltage cable, K22-displacement path of the second X-ray source in the metal wire area of ​​the high-voltage cable. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] Embodiment 1: The present invention designs a continuous and dynamic online quality inspection device for high-voltage cables, and the specific structure is as follows:

[0038] Combination Figure 1 , Figure 2 , Figure 4In the structural assembly for performing lateral inspection on the high-voltage cable 1, the first reducer 3 is fixedly installed at the output end of the first azimuth servo motor 2, the output end of the first reducer 3 is fixedly connected to the first screw rod 4, when the first screw rod 4 rotates, it pushes the first displacement frame 5 to move, the first X-ray source 6 is fixedly installed on the first displacement frame 5, the first displacement frame 5 is fixedly connected to the first synchronous support plate 501, and the first detection receiver 7 is fixedly installed on the first synchronous support plate 501.

[0039] Combination Figure 3 , Figure 4 The first X-ray source 6 and the first detection receiver 7 are arranged in relative positions. The first X-ray source 6 is provided with a first azimuth irradiation port 601 facing the high-voltage cable 1 , and the first azimuth irradiation port 601 is also facing the X-ray receiving surface of the first detection receiver 7 .

[0040] Combination Figure 1 , Figure 2 , Figure 4 , in the structural components for vertical inspection of the high voltage cable 1,

[0041] The second reducer 9 is fixedly installed at the output end of the second azimuth servo motor 8, and the output end of the second reducer 9 is fixedly connected to the second screw rod 10. When the second screw rod 10 rotates, it pushes the second displacement frame 11 to move. The second X-ray source 12 is fixedly installed on the second displacement frame 11. The second synchronous support plate 1101 is fixedly connected to the second displacement frame 11, and the second detection receiver 13 is fixedly installed on the second synchronous support plate 1101.

[0042] The second azimuth irradiation port 1201 of the second X-ray source 12 faces the high-voltage cable 1 , and the second azimuth irradiation port 1201 is also opposite to the X-ray receiving surface of the second detection receiver 13 .

[0043] When detecting the high-voltage cable 1 , the moving directions of the first X-ray source 6 and the second X-ray source 12 are perpendicular to the moving direction of the high-voltage cable 1 , and the position detected by the first X-ray source 6 is located upstream of the position detected by the second X-ray source 12 .

[0044] The direction in which the first X-ray source 6 is driven to move by the first azimuth servo motor 2 is perpendicular to the direction in which the second X-ray source 12 is driven to move by the second azimuth servo motor 8 .

[0045] Embodiment 2: The present invention designs a method for real-time dynamic continuous online quality inspection of high-voltage cables. The specific method is as follows:

[0046] First, according to the diameter of the high-voltage cable 1 and the position where the high-voltage cable 1 passes through the inspection equipment, the displacement range of the first azimuth servo motor 2 to drive the first X-ray source 6 is adjusted [L 折点1 , L 折点2], debug the displacement range of the second X-ray source 12 driven by the second azimuth servo motor 8 [L 折点3 , L 折点4 ].

[0047] Then, according to the radial distribution position of the metal wire area 102 of the high-voltage cable 1, the displacement range [L 金属1 , L 金属2 ], determine the displacement range [L 金属3 , L 金属4 ].

[0048] Then, the high-voltage cable 1 passes through the inspection equipment and starts to move at a constant speed. The first azimuth servo motor 2 is started, driving the first X-ray source 6 to move at a constant speed. 折点1 , L 折点2 ]The displacement range makes reciprocating motion.

[0049] Wherein, during the movement of the first X-ray source 6:

[0050] When the real-time moving position point L x1 ∈[L 折点1 , L 金属1 ) or L x1 ∈(L 金属2 , L 折点2 ], the moving speed of the first X-ray source 6 is the first moving speed V preset by the system 1 .

[0051] When the real-time moving position point L x1 ∈[L 金属1 , L 金属2 ], the moving speed of the first X-ray source 6 is the second moving speed V preset by the system 2 , where V 1 ≥2V 2 .

[0052] In addition, the distance between the position where the first X-ray source detects the high-voltage cable and the position where the second X-ray source detects the high-voltage cable is preset to be L c , the preset high-voltage cable moving speed is V.

[0053] It can be concluded that the time taken for any position point G of the high-voltage cable 1 to reach the position where the second X-ray source 12 detects the high-voltage cable 1 from the first X-ray source is: T c =L c / V.

[0054] It can be concluded that the first X-ray source 6 is from L 折点1 Move the position point to L金属1 The time taken for the location point is: T 1 =︳L 金属1 -L 折点1 ︳ / V 1 .

[0055] When the time interval T c +2T 1 After that, the second azimuth servo motor 8 is started, driving the second X-ray source 12 according to [L 折点3 , L 折点4 ] displacement interval to make a reciprocating motion. In the present invention, there is a distance difference between the second X-ray source 12 and the first X-ray source 6. Even if the detection is performed on the same position of the high-voltage cable 1, a delay of Tc is required. In addition, it is necessary to detect the non-metallic wire area 102 that is not detected by the first X-ray source 6. A certain delay is still required. When the first X-ray source 6 is detecting the cable interval of the non-metallic wire area 102, the second X-ray source 12 is in the detection stage of the metal wire area 102. Figure 5 , Figure 6 , it can be seen that an additional 2T is needed 1 of delay.

[0056] Figure 5 When the first X-ray source 6 is at K 11 , K 13 When the detection is done, the non-metallic conductor area of ​​the high-voltage cable is detected. 12 When detecting, the metal conductor area of ​​the high-voltage cable is detected.

[0057] Figure 6 When the second X-ray source 12 is at K 21 , K 23 When the detection is done, the non-metallic conductor area of ​​the high-voltage cable is detected. 22 When detecting, the metal conductor area of ​​the high-voltage cable is detected.

[0058] The second X-ray source 12 detects K 22 The section is actually the K detected by the first X-ray source 6. 11 , K 13 Section, so that the metal conductor area of ​​the high-voltage cable that is not detected by the first X-ray source 6 can be detected when the second X-ray source 12 detects.

[0059] Then, during the movement of the second X-ray source 12:

[0060] When the real-time moving position point L x2 ∈[L 折点3 , L 金属3 ) or L x2 ∈(L 金属4 , L折点4 ], the moving speed of the second X-ray source 12 is the first moving speed V preset by the system. 1 .

[0061] When the real-time moving position point L x1 ∈[L 金属1 , L 金属2 ], the moving speed of the second X-ray source 12 is a second moving speed V preset by the system. 2 .

[0062] Finally, according to the above-mentioned movement control method, the first X-ray source 6 and the second X-ray source 12 are made to move back and forth to continuously perform dynamic inspection on the high-voltage cable 1 .

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-voltage cable online quality inspection method, the inspection method being implemented by relying on a high-voltage cable online quality inspection device, the inspection device comprising a transverse inspection component and a vertical inspection component for inspecting the high-voltage cable (1); the transverse inspection component comprising a first azimuth servo motor (2), a first X-ray source (6) drivingly connected to the first azimuth servo motor (2), and a first detection receiver (7), wherein: The first X-ray source (6) and the first detection receiver (7) are arranged relative to each other and are fixedly connected to the same fixed structure; the vertical inspection component comprises a second azimuth servo motor (8), a second X-ray source (12) driven by the second azimuth servo motor (8), and a second detection receiver (13), wherein the second X-ray source (12) and the second detection receiver (13) are arranged relative to each other and are fixedly connected to the same fixed structure; wherein the direction in which the first azimuth servo motor (2) drives the first X-ray source (6) to move is perpendicular to the direction in which the second azimuth servo motor (8) drives the second X-ray source (12) to move, and the characteristic is that: S1. According to the diameter of the high-voltage cable (1) and the position of the high-voltage cable (1) passing through the inspection equipment, adjust the displacement range of the first azimuth servo motor (2) to drive the first X-ray source (6) [L 折点1 , L 折点2 ], adjusting the displacement range [L of the second X-ray source (12) driven by the second azimuth servo motor (8) 折点3 , L 折点4 ]; S2. According to the radial distribution position of the metal wire area (102) of the high-voltage cable (1) in the high-voltage cable (1), determine the irradiation displacement range [L 金属1 , L 金属2 ], determine the displacement range [L 金属3 , L 金属4 ]; S3. The high-voltage cable (1) passes through the inspection equipment and starts to move at a constant speed. The first azimuth servo motor (2) starts, driving the first X-ray source (6) according to [L 折点1 , L 折点2 ]The displacement interval makes a reciprocating motion; S4. During the movement of the first X-ray source (6): When the real-time moving position point L x1 ∈[L 折点1 , L 金属1 ) or L x1 ∈(L 金属2 , L 折点2 ], the moving speed of the first X-ray source (6) is a first moving speed V1 preset by the system; When the real-time moving position point L x1 ∈[L 金属1 , L 金属2 ], the moving speed of the first X-ray source (6) is a second moving speed V2 preset by the system, wherein V1 ≥ 2V2; S5. Assume that the distance between the position where the first X-ray source detects the high-voltage cable and the position where the second X-ray source detects the high-voltage cable is L c , let the moving speed of the high voltage cable be V; The time taken for any position point G of the high-voltage cable (1) to reach the position where the first X-ray source detects the high-voltage cable (1) and the second X-ray source (12) detects the high-voltage cable (1) is: T c =L c / V; The first X-ray source (6) is from L 折点1 Move the position point to L 金属1 The time taken for the location point is: T1=︳L 金属1 -L 折点1 ︳ / V1; S6. Time interval T c After +2T1, the second azimuth servo motor (8) is started, driving the second X-ray source (12) to move in accordance with [L 折点3 , L 折点4 ]The displacement interval makes a reciprocating motion; S7. During the movement of the second X-ray source (12): When the real-time moving position point L x2 ∈[L 折点3 , L 金属3 ) or L x2 ∈(L 金属4 , L 折点4 ], the moving speed of the second X-ray source (12) is a first moving speed V1 preset by the system; When the real-time moving position point L x1 ∈[L 金属1 , L 金属2 ], the moving speed of the second X-ray source (12) is a second moving speed V2 preset by the system; S8. Follow the steps S3 to S7.

2. A high-voltage cable online quality inspection method according to claim 1, characterized in that: The lateral inspection component is further provided with a first reducer (3), the first reducer (3) being connected to the output end of the first azimuth servo motor (2), and the output end of the first reducer (3) being fixedly connected to the first screw rod (4); The transverse inspection assembly is also configured to have a first displacement frame (5) for fixedly mounting a first X-ray source (6), the first displacement frame (5) being fixedly connected to a first synchronous support plate (501), and the first detection receiver (7) being fixedly connected to the first synchronous support plate (501).

3. A high-voltage cable online quality inspection method according to claim 1 or 2, characterized in that: The first X-ray source (6) is provided with a first azimuth irradiation port (601) facing the high-voltage cable (1), and the X-ray receiving surface of the first detection receiver (7) is opposite to the first azimuth irradiation port (601).

4. The method for online quality inspection of high-voltage cables according to claim 1, characterized in that: The vertical inspection component is further provided with a second reducer (9), the second reducer (9) being connected to the output end of the second azimuth servo motor (8), and the output end of the second reducer (9) being fixedly connected to the second screw rod (10); The vertical inspection assembly is also configured with a second displacement frame (11) for fixedly mounting a second X-ray source (12), the second displacement frame (11) being fixedly connected to a second synchronous support plate (1101), and the second detection receiver (13) being fixedly connected to the second synchronous support plate (1101).

5. A high-voltage cable online quality inspection method according to claim 1 or 4, characterized in that: The second X-ray source (12) is provided with a second azimuth irradiation port (1201) facing the high-voltage cable (1), and the X-ray receiving surface of the second detection receiver (13) is opposite to the second azimuth irradiation port (1201).

6. A high-voltage cable online quality inspection method according to claim 1, characterized in that: The position at which the first X-ray source (6) detects the high-voltage cable (1) is located upstream of the position at which the second X-ray source (12) detects the high-voltage cable (1).

7. The method for online quality inspection of high-voltage cables according to claim 1, characterized in that: The moving direction of the first X-ray source (6), the moving direction of the second X-ray source (12) and the moving direction of the high-voltage cable (1) are perpendicular to each other.

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