Cable aging detection device

Abstract

The invention relates to the technical field of electric power overhaul, in particular to a cable aging detection device which comprises an outer sleeve, a supporting frame is fixedly installed on the bottom face of the outer wall of the outer sleeve, inserting holes used for inserting cables are formed in the centers of the two ends of the outer sleeve, and the cables are inserted into an inner cavity of the outer sleeve in a penetrating mode; a conveying structure used for driving a cable to move, a detection structure used for detecting whether a crack exists in the surface of the cable or not, an auxiliary structure used for assisting exposure of the crack and a cleaning structure used for cleaning the surface of the cable are sequentially installed in an inner cavity of the outer sleeve from left to right, and multiple sets of partition plates ensuring stable movement of the cable are fixedly installed on the inner wall of the outer sleeve. The spraying mechanism is arranged, dry powder is evenly sprayed to the surface of the cable through the nozzle, dry powder particles are rapidly diffused and naturally permeate into micro cracks on the surface of the cable under the action of airflow, high-contrast visual marks are formed, the crack position can be clearly marked, and position data of the crack can be more accurately obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power maintenance, in particular to a cable aging detection device. Background Art

[0002] Cable aging detection devices are used to assess the insulation condition of cables. They determine the degree of cable aging by measuring parameters such as partial discharge, dielectric loss, and insulation resistance. Common methods include high-frequency current sensors, ultrasonic testing, and infrared thermal imaging. They can promptly detect potential faults, prevent cable failures, and ensure the safe operation of power systems. They are widely used in the power, communications, and industrial sectors.

[0003] After massive searches, it was found that the prior art announcement number CN110261743B discloses a cable aging detection device, including a base, wheels fixedly installed at the four corners of the bottom end of the base, a push handle fixed at the side end of the base, a battery fixedly installed on one side of the top surface of the base, a support rod fixed on the other side of the top surface of the base, and a warning light fixed on the top of the support rod.

[0004] Therefore, based on the above search and combined with existing technologies, the surface insulation layer of the cable is prone to aging and cracking due to the combined effects of environmental factors, electrical stress and mechanical stress during long-term use. These defects initially appear as invisible microcracks (less than 0.1 mm in width), but the device uses traditional manual visual inspection methods, which makes it difficult to detect microcracks. As the operating time increases, the microcracks gradually expand into penetrating defects, resulting in a decrease in insulation resistance and an increase in dielectric loss, which may eventually cause serious faults such as phase-to-phase short circuit and metal sheath breakdown, threatening the safe operation of the power grid. Summary of the Invention

[0005] The object of the present invention is to provide a cable aging detection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a cable aging detection device, comprising an outer sleeve, a support frame fixedly mounted on the bottom surface of the outer wall of the outer sleeve, a jack for inserting a cable at the center of each end of the outer sleeve, and a cable inserted into the inner cavity of the outer sleeve;

[0007] The inner cavity of the outer sleeve is equipped with a conveying structure for driving the cable to move, a detection structure for detecting whether there are cracks on the cable surface, an auxiliary structure for assisting in exposing the cracks, and a cleaning structure for cleaning the cable surface from left to right. The inner wall of the outer sleeve is fixedly equipped with multiple groups of partitions to ensure stable movement of the cable.

[0008] The auxiliary structure consists of an anti-static mechanism, a contraction mechanism and a spraying mechanism, and the three are separated by partitions. The ion wind rod in the anti-static mechanism is located between two sets of partitions and is used to evenly blow positive and negative ion flows to achieve the effect of eliminating electrostatic interference. The extrusion block in the contraction mechanism is sleeved on the outer wall of the cable to squeeze the cable to generate moving resistance to expand the crack. The spraying pipe in the spraying mechanism is fixedly connected to the outer sleeve to locate the crack position.

[0009] As a further solution of the present invention, the detection structure includes an insulation resistance tester and a dielectric constant measuring instrument, which are both fixedly installed inside the outer sleeve. The insulation resistance tester is used to measure the insulation resistance value of the cable in real time, and the dielectric constant of the cable is measured using the dielectric constant measuring instrument. The degree of aging of the cable is evaluated based on the changes in the measured electrical performance parameters.

[0010] As a further solution of the present invention, the spraying mechanism includes a connecting block, which is fixedly mounted on the outer wall of the spraying pipe, and the spraying pipe is fixedly connected to the inner wall of the outer sleeve through the connecting block. A plurality of nozzles for spraying dry powder are fixedly installed on one side of the spraying pipe, and a storage box for conveying dry powder is fixedly installed on the top surface of the outer sleeve, and the bottom end of the storage box is fixedly connected to the spraying pipe.

[0011] As a further solution of the present invention, the destaticizing mechanism includes a fixed rod, which is fixedly installed between two groups of partitions. The bottom surface of the fixed rod is fixedly connected to the ion wind rod. The ion wind rods are provided in two groups of four, and the corresponding sides of the two groups of ion wind rods are fixedly installed with air outlets. A large number of positive and negative ions are generated by the ion wind rods, and the air outlet is used to blow the ion airflow evenly to the cable surface, so that the ions react with the static charge on the cable surface to neutralize each other, effectively eliminating the static electricity on the cable surface, thereby reducing the interference of static electricity on the subsequent dry powder spraying operation.

[0012] As a further solution of the present invention, the contraction mechanism includes a driving disk, one side of the driving disk is rotatably connected to one group of partitions, and a fixed disk is installed on the other side of the driving disk, and the fixed disk is fixedly connected to the inner wall of the outer sleeve. There are a total of multiple extrusion blocks and they are all slidably installed between the driving disk and the fixed disk. A driving rod for driving the extrusion block to rotate is fixedly installed on the side of each extrusion block close to the driving disk, and the other side of each extrusion block is rotatably connected to the fixed disk.

[0013] As a further solution of the present invention, the detection structure also includes a rotating ring, which is provided with two rotating rings and is located between two groups of partitions. Four groups of fixing frames are fixedly installed on the corresponding sides of the two rotating rings, and each group of fixing frames is fixedly installed with a cleaning brush for removing dry powder near the end of the cable.

[0014] As a further solution of the present invention, the conveying structure includes rollers, and the rollers are arranged in two groups of three, and the two groups of rollers are respectively located on the upper and lower sides of the inner part of the outer sleeve. The inner cavity of each roller is fixedly connected to a rotating rod for driving the roller to rotate, and each two rotating rods are connected to each other by a belt. The outer wall of the outer sleeve is fixedly installed with a motor 2 for providing rotational power to the rotating rod, and one end of one of the rotating rods is passed through the outer wall of the outer sleeve and fixedly connected to the output end of motor 2.

[0015] As a further solution of the present invention, the cleaning structure includes a fixed ring, the outer surface fixed sleeve of the fixed ring is provided with a positioning frame for positioning the fixed ring, and the fixed ring is fixedly connected to the inner wall of the outer sleeve through the positioning frame, the outer wall rotating sleeve of the fixed ring is provided with multiple wheels, and one side of each of the wheels is fixedly connected to a dust removal brush for cleaning the cable surface, and the dust removal brush is in contact with the outer surface of the cable.

[0016] As a further solution of the present invention, an air pump 2 is fixedly installed on the bottom surface of the outer wall of the outer sleeve, and the air delivery end of the air pump 2 is fixedly connected to a jet pipe for auxiliary cleaning. The air is supplied by the air pump 2 and ejected from the jet pipe to effectively blow away impurities on the surface of the cable.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the present invention is used, a spraying mechanism is provided to evenly spray dry powder onto the cable surface using a nozzle. Under the action of the airflow, the dry powder particles quickly diffuse and naturally penetrate into the micro-cracks on the cable surface, forming a high-contrast visual mark that can clearly mark the crack location and provide a significant visual reference for subsequent detection. Combined with the detection structure, the crack location data can be obtained more accurately. At the same time, through the analysis of the amount of recovered dry powder by the weighing sensor, key parameters such as the number and depth of the cracks can be further obtained, thereby achieving a comprehensive assessment of the cable aging condition, significantly improving the detection accuracy and reliability of the device, and providing strong support for the health status assessment of the cable;

[0019] 2. When the present invention is used, a contraction mechanism is provided and a controllable pressure is applied to the cable by using an extrusion block. At the same time, combined with the continuous traction of the roller, the micro-cracks on the cable surface are expanded to a visible scale under the action of dynamic stress, effectively amplifying the size of the cracks, so that the dry powder can fall into the cracks more easily. In combination with the anti-static mechanism, the positive and negative ion airflows generated by the ion wind rod neutralize the static charge on the cable surface, eliminating the interference of static electricity on the adsorption of dry powder, ensuring that the dry powder can evenly cover and accurately fill the cracks, providing a clear and reliable marking basis for subsequent detection, and improving the sensitivity and accuracy of the device detection;

[0020] 3. When the present invention is used, the detection accuracy and reliability of the device are significantly improved. By setting up a cleaning structure and utilizing the dual functions of a dust removal brush and air flow blowing, impurities on the cable surface can be efficiently removed, ensuring that microcracks can be accurately displayed during subsequent inspections. The dust removal brush deeply cleans the cable surface through rotation, while the air flow blowing further removes residual fine particles, providing an interference-free environment for inspection. At the same time, the conveying structure ensures the smooth movement of the cable through the stable rotation of the roller, which not only ensures the continuity of the inspection process, but also provides stable operating conditions for modules such as cleaning, destaticization, and dry powder spraying, effectively improving the reliability and stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a cable aging detection device;

[0022] Figure 2 This is a cross-sectional view of the overall structure of a cable aging detection device;

[0023] Figure 3 It is a cross-sectional view of a spray mechanism in a cable aging detection device;

[0024] Figure 4 This is a cross-sectional view of a destaticizing mechanism in a cable aging detection device;

[0025] Figure 5 This is a disassembled diagram of a retraction mechanism in a cable aging detection device;

[0026] Figure 6 It is a cross-sectional view of a detection structure in a cable aging detection device;

[0027] Figure 7 It is a cross-sectional view of a conveying structure in a cable aging detection device;

[0028] Figure 8 This is a cross-sectional view of a cleaning structure in a cable aging detection device.

[0029] Figure: 1, outer sleeve; 2, support frame; 3, cable; 4, partition; 501, ion wind rod; 502, fixing rod; 503, air outlet; 504, air pipe; 601, extrusion block; 602, drive plate; 603, fixing plate; 604, motor 1; 605, gear; 606, drive rod; 701, spray pipe; 702, connecting block; 703, nozzle; 704, storage box; 705, air pump 1; 706, collection box; 707, feed pipe; 80 1. Rotating ring; 802. Fixed frame; 803. Cleaning brush; 804. Connecting plate; 805. Roller; 806. Driving wheel; 807. Triangular wheel; 808. Collection box; 901. Roller; 902. Rotating rod; 903. Belt; 904. Second motor; 101. Fixed ring; 102. Positioning frame; 103. Rotating wheel; 104. Dust removal brush; 105. Dust box; 106. Second air pump; 107. Jet pipe; 108. Air supply pipe; 109. Filter plate. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1 and 2 A cable aging detection device includes an outer sleeve 1, a support frame 2 is fixedly installed on the bottom surface of the outer wall of the outer sleeve 1, and holes for inserting cables 3 are opened at the centers of both ends of the outer sleeve 1, and the cable 3 is inserted into the inner cavity of the outer sleeve 1;

[0032] The inner cavity of the outer sleeve 1 is equipped with a conveying structure for driving the cable 3 to move, a detection structure for detecting whether there are cracks on the surface of the cable 3, an auxiliary structure for assisting in exposing the cracks, and a cleaning structure for cleaning the surface of the cable 3. The inner wall of the outer sleeve 1 is fixedly installed with multiple groups of partitions 4 to ensure the stable movement of the cable 3.

[0033] The auxiliary structure consists of an anti-static mechanism, a contraction mechanism, and a spraying mechanism, and all three are separated by a partition 4. The ion wind rod 501 in the anti-static mechanism is located between the two sets of partitions 4 and is used to evenly blow positive and negative ion flows to achieve the effect of eliminating static interference. The extrusion block 601 in the contraction mechanism is sleeved on the outer wall of the cable 3 to squeeze the cable 3 to generate movement resistance to expand the crack. The spraying pipe 701 in the spraying mechanism is fixedly connected to the outer sleeve 1 to locate the crack position;

[0034] The detection structure includes an insulation resistance tester and a dielectric constant meter, both of which are fixedly installed inside the outer sleeve 1. The insulation resistance tester measures the insulation resistance value of the cable 3 in real time, and the dielectric constant meter measures the dielectric constant of the cable 3. The aging degree of the cable 3 is evaluated based on the changes in the measured electrical performance parameters.

[0035] Specifically, a hole for inserting the cable 3 is provided at the axis of each set of partitions 4, and the cables 3 are inserted into the hole in sequence.

[0036] See also Figures 1 to 3 The spraying mechanism includes a connecting block 702, which is fixedly mounted on the outer wall of the spraying pipe 701, and the spraying pipe 701 is fixedly connected to the inner wall of the outer sleeve 1 through the connecting block 702. A plurality of nozzles 703 for spraying dry powder are fixedly installed on one side of the spraying pipe 701. A storage box 704 for conveying dry powder is fixedly installed on the top surface of the outer sleeve 1, and the bottom end of the storage box 704 is fixedly connected to the spraying pipe 701 through a pipe.

[0037] Specifically, each nozzle 703 is provided with a certain inclination angle so as to utilize the diffusion characteristics of the dry powder to cover the entire surface of the cable 3. The bottom end of the storage box 704 is provided with an opening, and a solenoid valve is fixedly installed at the opening. By controlling the switch of the solenoid valve, the spraying amount and spraying time of the dry powder can be accurately controlled. An air pump 705 is fixedly installed on one side of the storage box 704 through a pipeline. The air pump 705 delivers compressed air into the storage box 704 to blow the dry powder into the spraying pipe 701.

[0038] More specifically, a collection box 706 for collecting excess dry powder is slidably mounted on the bottom end of the outer sleeve 1, and a feed pipe 707 for injecting dry powder is fixedly mounted on the storage box 704;

[0039] More specifically, the dry powder is evenly sprayed onto the surface of the cable 3 through the nozzle 703. The dry powder particles diffuse rapidly under the action of the airflow and cover the entire outer surface of the cable 3. Since the dry powder particles are small and highly fluid, they can naturally penetrate into the tiny cracks (less than 0.1 mm in width) on the surface of the cable 3 and fill the gaps in the cracks, thereby achieving accurate detection of cracks on the surface of the cable 3. At the same time, multiple nozzles 703 ensure that the surface of the cable 3 can be effectively and comprehensively covered to avoid the possibility of missed detection. The dry powder uses non-corrosive talcum powder to effectively prevent chemical reactions with the insulation layer of the cable 3 and prevent secondary corrosion damage to the cable 3 during the detection process. At the same time, the partition 4 is used to scrape off the dry powder on the surface of the cable 3 when the cable 3 moves.

[0040] See also Figures 1 and 2 、 Figure 4The anti-static mechanism includes a fixed rod 502, which is fixedly installed between two groups of partitions 4. The bottom surface of the fixed rod 502 is fixedly connected to the ion wind rod 501 by a bolt. The ion wind rod 501 is provided in two groups with four as a group, and the air outlet 503 is fixedly installed on the corresponding side of the two groups of ion wind rods 501. A large number of positive and negative ions are generated by the ion wind rod 501, and the air outlet 503 is used to evenly blow the ion airflow to the surface of the cable 3, so that the ions react with the static charge on the surface of the cable 3 to neutralize the static electricity on the surface of the cable 3, thereby effectively eliminating the static electricity on the surface of the cable 3, thereby reducing the interference of static electricity on the subsequent dry powder spraying operation;

[0041] Specifically, both ends of each ion wind rod 501 are fixedly connected to an air pipe 504 for injecting air into the ion wind rod 501 through a pipeline, and two sets of air pipes 504 are fixedly connected to the inner wall of the outer sleeve 1.

[0042] See also Figures 1 and 2 、 Figure 5 , the contraction mechanism includes a driving disk 602, one side of the driving disk 602 is rotatably connected to one group of partitions 4 through a bearing, and a fixed disk 603 is installed on the other side of the driving disk 602, and the fixed disk 603 is fixedly connected to the inner wall of the outer sleeve 1. A total of multiple extrusion blocks 601 are provided and are all slidably installed between the driving disk 602 and the fixed disk 603. A driving rod 606 for driving the extrusion block 601 to rotate is fixedly installed on one side of each extrusion block 601 close to the driving disk 602, and the other side of each extrusion block 601 is rotatably connected to the fixed disk 603 through a connecting rod;

[0043] Specifically, a jack for inserting the cable 3 is provided at the center of the driving disk 602 and the fixed disk 603. A sliding groove for controlling the sliding of the driving rod 606 is provided in the inner cavity of the driving disk 602, and one end of the driving rod 606 is located in the sliding groove.

[0044] More specifically, a pressure sensor is provided inside each extrusion block 601. The pressure sensor can monitor the pressure applied by the extrusion block 601 to the cable 3 in real time to ensure that the pressure is within a safe range and to avoid damage to the surface of the cable 3 or rupture of the insulation layer due to excessive pressure. In addition, a silicone pad for reducing wear is fixedly installed on the side of each extrusion block 601 close to the cable 3. The silicone pad is soft and elastic and can effectively reduce the direct friction between the extrusion block 601 and the surface of the cable 3, thereby preventing the surface of the cable 3 from being worn or scratched due to extrusion.

[0045] More specifically, a motor 604 for providing rotational power to the drive disk 602 is fixedly installed on the bottom surface of the inner cavity of the outer sleeve 1, a gear 605 is fixedly installed on the output shaft of the motor 604, a serrated ring is fixedly installed on the outer wall of the drive disk 602, and the drive disk 602 is meshed with the gear 605.

[0046] Example 2: Please refer to Figures 1 and 2 、 Figure 6 A cable aging detection device is provided. The difference from Example 1 is that the detection structure further includes a rotating ring 801. Two rotating rings 801 are provided and are each located between two sets of partitions 4. Four sets of fixing frames 802 are fixedly installed on the corresponding sides of the two rotating rings 801. A cleaning brush 803 for removing dry powder is fixedly installed on the end of each fixing frame 802 close to the cable 3.

[0047] Specifically, the insulation resistance tester and the dielectric constant meter are fixedly installed inside each cleaning brush 803, and their detection probes are in contact with the outer surface of the cable 3. One end of each cleaning brush 803 is tightly fitted to the outer surface of the cable 3, and the length of the cleaning brush 803 exceeds the distance between the two ends, so as to ensure that the cleaning brush 803 can fully contact the surface of the cable 3 and deeply sweep away the dry powder in the crack, ensuring the cleanliness of the detection area, and providing an accurate basis for subsequent detection steps;

[0048] More specifically, a plurality of connecting plates 804 are fixedly installed on the corresponding sides of the two groups of partitions 4 on both sides of the rotating ring 801. A roller 805 is rotatably installed inside each group of connecting plates 804 through a pin shaft. The pin shaft inside the roller 805 passes through the roller 805 and is fixedly installed with a driving wheel 806. A triangular wheel 807 is rotatably installed on the outer wall of the connecting plate 804 through a connecting rod, and the triangular wheel 807 is meshed with the driving wheel 806. A transmission wheel for driving the rotating ring 801 to rotate is fixedly installed on the side of the triangular wheel 807 away from the connecting rod. A serrated ring is fixedly installed on the inner wall of the rotating ring 801, and the rotating ring 801 is meshed with the transmission wheel through the serrated ring.

[0049] More specifically, a collection box 808 for collecting dry powder is fixedly installed on the bottom surface of the outer sleeve 1, and a weighing sensor is provided on the inner wall of the collection box 808. By analyzing the amount of recovered dry powder through the weighing sensor, the depth, width and distribution of the cracks can be further evaluated, providing a reliable basis for judging the aging degree of the cable 3 and improving the accuracy and comprehensiveness of the device detection.

[0050] See also Figures 1 and 2 、 Figure 7 The conveying structure includes rollers 901. The rollers 901 are arranged in two groups of three, and the two groups of rollers 901 are respectively located on the upper and lower sides of the inner cavity of the outer sleeve 1. The inner cavity of each roller 901 is fixedly connected to a rotating rod 902 for driving the roller 901 to rotate, and every two rotating rods 902 are rotatably connected by a belt 903. The outer wall of the outer sleeve 1 is fixedly installed with a second motor 904 for providing rotational power to the rotating rod 902. One end of one of the rotating rods 902 is passed through the outer wall of the outer sleeve 1 and is fixedly connected to the output end of the second motor 904.

[0051] Specifically, each roller 901 fits against the outer surface of the cable 3, and the end of each rotating rod 902 away from the roller 901 is rotatably connected to the inner wall of the outer sleeve 1 through a bearing. The outer wall fixed sleeve of each rotating rod 902 is provided with a chuck for limiting the belt 903, and the belt 903 is rotatably sleeved on the outside of the chuck. There are multiple belts 903, which are distributed at both ends of the roller 901 and surround adjacent rollers 901 in a staggered arrangement. The belts 903 connect different rollers 901 to form a transmission system, which helps multiple rollers 901 to rotate in coordination and achieve smooth transportation of the cable 3.

[0052] Example 3: Please refer to Figure 1 、 Figure 2 、 Figure 4 、 Figure 8 , a cable aging detection device, which differs from Example 1 in that the cleaning structure includes a fixing ring 101, a fixed sleeve on the outer surface of the fixing ring 101 is provided with a positioning frame 102 for positioning the fixing ring 101, and the fixing ring 101 is fixedly connected to the inner wall of the outer sleeve 1 through the positioning frame 102, and the outer wall of the fixing ring 101 is provided with a plurality of rotating wheels 103 through a bearing rotating sleeve, and a dust removal brush 104 for cleaning the surface of the cable 3 is fixedly connected to one side of each rotating wheel 103, and the dust removal brush 104 is in contact with the outer surface of the cable 3;

[0053] Specifically, two groups of rotating wheels 103 and dust removal brushes 104 are provided, and the two groups of dust removal brushes 104 are staggered with each other, so as to achieve all-round and no-dead-angle cleaning of the surface of the cable 3 during its movement, effectively remove all kinds of attached impurities, and provide good conditions for subsequent inspection. The rotating wheel 103 is in contact with the surface of the cable 3, and the friction force causes the rotating wheel 103 to rotate when the cable 3 moves. A dust box 105 for collecting dust is slidably installed at the bottom end of the inner cavity of the outer sleeve 1;

[0054] An air pump 2 106 is fixedly installed on the bottom surface of the outer wall of the outer sleeve 1. The air supply end of the air pump 2 106 is fixedly connected to an air jet pipe 107 for auxiliary cleaning. The air is supplied by the air pump 2 106 and ejected from the air jet pipe 107 to effectively blow away impurities on the surface of the cable 3.

[0055] Specifically, air supply pipes 108 are connected to both sides of the outer wall of the outer sleeve 1, and one end of the air supply pipe 108 is connected to the air delivery pipe 504, which can continuously supply air for the blowing operation of the ion wind rod 501. A filter plate 109 for filtering air is fixedly installed on the inner wall of the outer sleeve 1. The air supply pipe 108 transports air filtered by the filter plate 109, which can effectively prevent dust, impurities, etc. from entering the ion wind rod 501, and the outer sleeve 1 is divided into two parts, and the two parts of the outer sleeve 1 are threadedly connected to each other. When the filter plate 109 needs to be replaced, the air supply pipe 108 is pulled out, and then the operator only needs to easily unscrew the two parts of the outer sleeve 1 to smoothly take out the filter plate 109 for replacement.

[0056] The working principle of the present invention is:

[0057] First, insert the cable 3 into the outer tube 1 through the jacks at both ends until the cable 3 is inserted between the two sets of rollers 901, so that the upper and lower sets of rollers 901 clamp the cable 3. Then start the second motor 904 to drive one of the rotating rods 902 to rotate. Then, the transmission system of the rotating rod 902 and the belt 903 rotates in coordination, thereby pulling the cable 3 to move inside the outer tube 1.

[0058] During this process, the cable 3 first passes through the cleaning structure, and the friction force is used to make the cable 3 move and drive the rotating wheel 103 to rotate, thereby causing the dust removal brush 104 to rotate under the drive of the rotating wheel 103, so as to achieve all-round and no-dead-angle cleaning of the surface of the cable 3, effectively removing impurities attached to the surface of the cable 3, and at the same time, with the help of the air pump 106, the air is sprayed from the air nozzle 107, effectively blowing away impurities on the surface of the cable 3, and the removed impurities fall into the dust box 105 for unified collection;

[0059] At the same time, the filter plate 109 is used to filter the air, and the air is injected into the air delivery pipe 504 from the air supply pipe 108, continuously supplying air for the blowing operation of the ion wind rod 501. The ion wind rod 501 generates a large number of positive and negative ions, and the ion airflow is evenly blown to the surface of the cable 3 through the air outlet 503. The ions react with the static charge on the surface of the cable 3 to neutralize the static electricity on the surface of the cable 3, thereby effectively eliminating the static electricity on the surface of the cable 3, providing convenience for subsequent cleaning of dry powder;

[0060] Then, the motor 1 604 is started to drive the gear 605 to rotate, and then the driving disk 602 is driven to rotate accordingly. When the driving disk 602 rotates, the driving rod 606 is controlled to slide in the sliding groove, thereby driving the squeezing block 601 to gradually approach the cable 3 and squeeze the cable 3. By squeezing the cable 3, a movement resistance is generated. When the roller 901 pulls the cable 3, the crack will expand, which is convenient for subsequent detection. At the same time, each squeezing block 601 is provided with a pressure sensor, which can monitor the pressure applied by the squeezing block 601 to the cable 3 in real time to ensure that the pressure is within a safe range, thereby avoiding damage to the surface of the cable 3 or rupture of the insulation layer due to excessive pressure;

[0061] When the cable 3 enters the spraying mechanism, the air pump 705 is started to deliver compressed air to the storage box 704. The dry powder in the storage box 704 is blown into the spraying pipe 701 under the action of the compressed air. The dry powder is evenly sprayed onto the surface of the cable 3 through multiple nozzles 703. The dry powder's diffusion characteristics are utilized to cover the entire surface of the cable 3. The dry powder particles are small and highly fluid, and can naturally penetrate into the tiny cracks on the surface of the cable 3, thereby achieving accurate detection of cracks on the surface of the cable 3. At the same time, excess dry powder falls into the collection box 706, and the partition 4 will scrape off the dry powder on the surface of the cable 3 when the cable 3 moves.

[0062] Finally, when the cable 3 passes through the rotating ring 801, the insulation resistance value of the cable 3 is measured in real time by an insulation resistance tester, and the dielectric constant of the cable 3 is measured by a dielectric constant meter. The aging degree of the cable 3 is evaluated based on the changes in the measured electrical performance parameters. At the same time, the roller 805 rotates due to friction when the cable 3 moves, thereby driving the driving wheel 806 to rotate. The driving wheel 806 engages with the triangular wheel 807, driving the triangular wheel 807 to rotate and drive the rotating ring 801 to rotate synchronously. The cleaning brush 803 rotates with the rotating ring 801, fully contacts the surface of the cable 3 and deeply sweeps away the dry powder in the crack. The swept dry powder falls into the collection box 808. The weighing sensor on the inner wall of the collection box 808 analyzes the amount of dry powder recovery, further evaluates the depth, width and distribution of the crack, and provides a reliable basis for judging the aging degree of the cable 3.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A cable aging detection device, comprising an outer sleeve, characterized in that: A support frame is fixedly installed on the bottom surface of the outer wall of the outer sleeve. A hole for inserting the cable is opened at the center of both ends of the outer sleeve, and the cable is inserted into the inner cavity of the outer sleeve. The inner cavity of the outer sleeve is equipped with a conveying structure for driving the cable to move, a detection structure for detecting whether there are cracks on the cable surface, an auxiliary structure for assisting in exposing the cracks, and a cleaning structure for cleaning the cable surface from left to right. The inner wall of the outer sleeve is fixedly installed with multiple groups of partitions to ensure stable movement of the cable. The auxiliary structure consists of an anti-static mechanism, a contraction mechanism and a spraying mechanism, and the three are separated by partitions. The ion wind rod in the anti-static mechanism is located between the two sets of partitions and is used to evenly blow positive and negative ion flows to achieve the effect of eliminating electrostatic interference. The extrusion block in the contraction mechanism is sleeved on the outer wall of the cable to squeeze the cable to generate moving resistance to expand the crack. The spraying pipe in the spraying mechanism is fixedly connected to the outer sleeve to locate the crack position.

2. A cable aging detection device according to claim 1, characterized in that: The detection structure includes an insulation resistance tester and a dielectric constant meter, both of which are fixedly installed inside the outer sleeve. The insulation resistance tester is used to measure the insulation resistance value of the cable in real time, and the dielectric constant meter is used to measure the dielectric constant of the cable. The aging degree of the cable is evaluated based on the changes in the measured electrical performance parameters.

3. The cable aging detection device according to claim 1, characterized in that: The spraying mechanism includes a connecting block, which is fixedly mounted on the outer wall of the spraying pipe, and the spraying pipe is fixedly connected to the inner wall of the outer sleeve through the connecting block. A plurality of nozzles for spraying dry powder are fixedly installed on one side of the spraying pipe, and a storage box for conveying dry powder is fixedly installed on the top surface of the outer sleeve, and the bottom end of the storage box is fixedly connected to the spraying pipe.

4. The cable aging detection device according to claim 1, characterized in that: The destaticization mechanism includes a fixed rod, which is fixedly installed between two groups of partitions. The bottom surface of the fixed rod is fixedly connected to the ion wind rod. The ion wind rods are provided in two groups of four, and air outlets are fixedly installed on the corresponding sides of the two groups of ion wind rods. A large number of positive and negative ions are generated by the ion wind rods, and the air outlets are used to blow the ion airflow evenly to the cable surface, so that the ions and the static charge on the cable surface are neutralized, effectively eliminating the static electricity on the cable surface, thereby reducing the interference of static electricity on the subsequent dry powder spraying operation.

5. The cable aging detection device according to claim 1, characterized in that: The contraction mechanism includes a driving disk, one side of the driving disk is rotatably connected to one group of partitions, and a fixed disk is installed on the other side of the driving disk, and the fixed disk is fixedly connected to the inner wall of the outer sleeve. There are a total of multiple extrusion blocks, and they are all slidably installed between the driving disk and the fixed disk. A driving rod for driving the extrusion block to rotate is fixedly installed on the side of each extrusion block close to the driving disk, and the other side of each extrusion block is rotatably connected to the fixed disk.

6. The cable aging detection device according to claim 1, characterized in that: The detection structure also includes a rotating ring, two of which are located between two groups of partitions. Four groups of fixing frames are fixedly installed on the corresponding sides of the two rotating rings, and a cleaning brush for removing dry powder is fixedly installed on the end of each group of fixing frames close to the cable.

7. The cable aging detection device according to claim 1, characterized in that: The conveying structure includes rollers, and the rollers are arranged in two groups of three, and the two groups of rollers are respectively located on the upper and lower sides of the inner cavity of the outer sleeve. The inner cavity of each roller is fixedly connected to a rotating rod for driving the roller to rotate, and each two rotating rods are connected to each other by a belt. The outer wall of the outer sleeve is fixedly installed with a second motor for providing rotational power to the rotating rod, and one end of one of the rotating rods is passed through the outer wall of the outer sleeve and fixedly connected to the output end of the second motor.

8. The cable aging detection device according to claim 1, characterized in that: The cleaning structure includes a fixed ring, a fixed sleeve on the outer surface of the fixed ring is provided with a positioning frame for positioning the fixed ring, and the fixed ring is fixedly connected to the inner wall of the outer sleeve through the positioning frame, and a rotating sleeve on the outer wall of the fixed ring is provided with multiple rotating wheels, and a dust removal brush for cleaning the cable surface is fixedly connected to one side of each rotating wheel, and the dust removal brush is in contact with the outer surface of the cable.

9. The cable aging detection device according to claim 8, characterized in that: An air pump 2 is fixedly installed on the bottom surface of the outer wall of the outer sleeve. The air delivery end of the air pump 2 is fixedly connected to an air jet pipe for auxiliary cleaning. Air is supplied by the air pump 2 and ejected from the air jet pipe to effectively blow away impurities on the cable surface.

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