Power network power transmission line cable detection device and system thereof

Abstract

The invention discloses a power network power transmission line cable detection device and system, the power network power transmission line cable detection device is composed of a cable detection positioning upper structure and a lower structure, the lower structure comprises an early warning detection positioning lower body, a side box, a wind wheel, a plurality of gears, a worm, a worm ring ratchet wheel and other transmission parts, and a high-resistance air bag, a telescopic air pipe, an air injection cover and other related assemblies; in the aspect of air injection weight reduction, a wind wheel captures wind energy, a piston inflating rod reciprocates through multi-stage transmission, a high-resistance air bag is inflated, air is ejected from an air injection cover to generate upward thrust, and the gravity burden of the detection device on a cable is reduced; in the deicing aspect, expansion and retraction of the high-resistance air bag drive a hydraulic piston rod to move, a helical ribbon rod is driven to rotate through a liquid pipe, a communicating pipe and other components, an ice breaking hammer is driven to strike ice on the surface of a cable, the ice is removed in time, and stable power transmission is guaranteed. The detection device and the system thereof can effectively solve the line safety problem caused by a traditional detection device, and improve the power network detection and maintenance level.

Description

Technical Field

[0001] The present invention relates to the technical field of power network transmission line detection, and specifically to a power network transmission line cable detection device and system thereof. Background Art

[0002] In the actual operation of the distribution network, due to the influence of environmental and human factors, phenomena such as lightning strikes, icing, tree obstacles, and irregular user electricity consumption are likely to occur, resulting in many line faults. Among them, the single-phase grounding fault rate is as high as over 80%. Moreover, the distribution line has a complex route, the fault point is very hidden, manual detection is difficult, the processing cycle is long, and the power supply reliability cannot be guaranteed. In order to solve the problems existing in the traditional distribution network fault detection and location, improve the efficiency and accuracy of fault handling, ensure the stable operation of the power grid, and meet the needs of the development of the smart grid, a power network transmission line cable detection and location system is proposed. The existing power network transmission line cable detection and location system mainly consists of a detection terminal (power network transmission line cable detection device) and a detection center, and adopts the distributed traveling wave detection technology, with the functions of fault detection and location and detection and early warning. Among them, the detection terminal looks like a square box on the outside, with performance such as rainproof, moisture-proof, corrosion-proof, earthquake-proof, lightning-proof, and electromagnetic interference-proof. It is installed on the wire of the overhead distribution line by a wire clamping structure, and can detect and collect the high-frequency fault current, fault traveling wave current, and ground electric field signal generated by the line fault in real time, and then upload them to the detection center through a wireless network.

[0003] The currently adopted on-line detection device for transmission line cables in the power system generally adopts a clamping installation structure, and its technical characteristics lead to the following two structural problems: The quality of the detection device body is directly transmitted to the cable body and the tower structure through the clamp, forming a continuous static load on its bearing system under normal operating conditions. According to the engineering measured data, a single set of standard detection device (including sensor group, power supply module, and communication unit) can generate an additional load of 4.6 - 7.2 kg, which will significantly affect the safety margin of large-span and high-tension transmission lines. In addition, under harsh winter weather conditions, the air turbulence generated at the bottom of the device makes supercooled water droplets more likely to adhere, forming an ice prism structure with a length of up to 1.5 m. When the cable body and the detection device are simultaneously iced, a synergistic weight gain effect will occur. Under typical working conditions (ice thickness of 15 mm), the ice load of a single tower will increase by an additional 2.3 - 3.8 tons, greatly increasing the risk coefficient of line cable breakage.

[0004] Therefore, a power network transmission line cable detection device and system thereof are proposed. Summary of the Invention

[0005] The object of the present invention is to provide a power network transmission line cable detection device and its system to solve the problem of increasing the additional load on the cable and the electric tower in the power network transmission line cable detection device mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A power network transmission line cable detection device includes: an upper structure for cable detection and positioning, with a semi-cable hole for cable access at the central position of the lower surface; A lower structure for cable detection and positioning, which also has a semi-cable hole on the upper surface corresponding to the cable hole of the upper structure for cable detection and positioning, and can be docked with the upper structure for cable detection and positioning and clamped and fixed on the cable surface by bolts. The lower structure for cable detection and positioning includes a lower body for early warning detection and positioning. Side boxes are connected to the front and rear sides of the lower body for early warning detection and positioning by bolts. The upper surface of the side box is rotatably connected to a wind wheel through a bearing seat, and the lower end of the rotating shaft of the wind wheel is fixed to a driving bevel gear rotatably arranged inside the side box. The lower side of the driving bevel gear is engaged and driven with a driven bevel gear. The rotating shaft of the driven bevel gear is connected to a worm rotatably arranged inside the lower body for early warning detection and positioning through a coupling. The upper side of the worm is in a worm thread transmission with a spiral ring ratchet rotatably arranged inside the lower body for early warning detection and positioning. The rotating shaft end of the spiral ring ratchet is connected to a camshaft body rotatably arranged inside the lower body for early warning detection and positioning through a coupling. A plurality of piston air injection rods are arranged in rolling contact with the lower side of the camshaft body. The rod body of the piston air injection rod extends downward and penetrates into a telescopic air pipe fixed inside a high-strength airbag through the lower body for early warning detection and positioning, and a piston is integrally arranged at one end penetrating into the telescopic air pipe. An intake one-way air valve and an exhaust one-way air valve are hermetically installed at the lower end and the side of the telescopic air pipe respectively. Jet covers are connected to the four corners of the bottom surface of the high-strength airbag by bolts, and through holes are opened at the positions of the jet covers inside the high-strength airbag, and a pressure relief valve is assembled at the position of the through hole. Two liquid pipes are fixedly arranged between the two jet covers arranged front and back inside the high-strength airbag, and a return liquid spring is fixedly arranged below the liquid pipe. The upper end of the return liquid spring is fixed to a hydraulic piston rod slidingly sealed inside the liquid pipe. The upper end of the hydraulic piston rod extends out of the liquid pipe and is fixed to the upper wall of the high-strength airbag. A liquid hole with a specified aperture is opened at the axis of the hydraulic piston rod, and the liquid holes of the two hydraulic piston rods are fixedly communicated through a connecting pipe at the upper end. One end of the connecting pipe extends out of the high-strength airbag and is communicated with an ice-breaking liquid path opened on the left and right sides inside the lower body for early warning detection and positioning. A spiral belt rod is slidingly sealed inside the expansion cross pipe above the ice-breaking liquid path. One end of the spiral belt rod spirally passes through a butterfly screw hole plate fixed at the upper port of the ice-breaking liquid path to the outside of the lower body for early warning detection and positioning, and is fixed to an ice-breaking hammer arranged below the cable.

[0007] Preferably, the spiral direction of the worm is adjusted according to the direction in which the worm ring ratchet rotates forward or backward in the same direction with respect to the camshaft body.

[0008] Preferably, each of the worm ring ratchets is composed of a ratchet and a worm ring rotatably sleeved on the ratchet, and the ratchets are arranged to rotate in the same direction under force. Among them, the rotating shafts of the ratchets extend in opposite directions along the cable direction.

[0009] Preferably, a rolling ball is arranged at the upper end of the piston air pump rod in cooperation with a ball seat, and a limiting sleeve plate is integrally arranged at the middle position of the rod body of the piston air pump rod. And a lower side of the rod body sleeve plate is sleeved with an air pump spring fixed to the sleeve plate at the upper end. The air pump spring is located in a compression chamber pre-opened inside the warning detection positioning lower body, and the lower end of the air pump spring is fixed to the bottom wall of the compression chamber.

[0010] Preferably, the telescopic air pipes are provided in an equal number corresponding to the piston air pump rods, and the pipe body of the telescopic air pipe is composed of a solid pipe fixed to the upper and lower inner walls of the high-strength air bag and a telescopic pipe integrally connecting the two solid pipes.

[0011] Preferably, the lower end of the intake check valve penetrates into a groove body pre-opened on the bottom surface of the high-strength air bag and open to the outside, and a protective cover for protecting and isolating the intake check valve is fixedly arranged on the bottom surface of the high-strength air bag at a position corresponding to the intake check valve.

[0012] A cable detection system for a power network transmission line mainly consists of an upper cable detection and positioning structure, a lower cable detection and positioning structure, and a detection center. Among them, the upper cable detection and positioning structure and the lower cable detection and positioning structure are installed on the cables of an overhead distribution line by a cable clamping structure, and can detect and collect high-frequency fault current, fault traveling wave current, and ground electric field signals generated by line faults in real time, and upload them to the detection center through a wireless network.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. Through the settings of the wind turbine, driving bevel gear, driven bevel gear, worm, scroll ring ratchet, camshaft body, piston air pump rod, air pump spring, telescopic air pipe, intake check valve, outlet check valve, highly resistant airbag and jet cover, the present invention can convert the kinetic energy of air flow into the reciprocating motion of the piston air pump rod, and then compress air to inflate the highly resistant airbag. When the air pressure in the highly resistant airbag reaches the pressure relief range of the pressure relief valve of the jet cover, the gas sprays out from the four corners, generating an upward thrust, so as to utilize the air push effect to intermittently reduce the gravity burden added to the cable after the installation of the power network transmission line cable detection device, avoid the static load continuously formed on the cable and the tower structure by the mass of the detection device body, effectively improve the safety margin of large-span and high-tension transmission lines. In addition, the air flow generated by jetting at the bottom of the device, while changing the air turbulence state, also keeps the highly resistant airbag in an active state, which can reduce the adhesion of supercooled water droplets at the bottom of the device and avoid the formation of icicle structures. This reduces the synergistic weight gain effect generated when the cable body and the detection device are both covered with ice, reduces the increase in ice load of a single tower, and greatly reduces the risk coefficient of cable breakage of the line; 2. Through the settings of the highly resistant airbag, hydraulic piston rod, liquid pipe, double liquid spring, connecting pipe, ice-breaking liquid path, spiral belt rod, spiral hole plate and ice-breaking hammer, the expansion and contraction of the highly resistant airbag can drive the hydraulic piston rod to slide up and down in the liquid pipe. By means of sucking and pressing the antifreeze safety liquid in the liquid pipe, the spiral belt rod is driven to rotate and drive the ice-breaking hammer to move, so as to strike the ice and snow attached to the surface of the cable. This active ice-removing method can timely remove the ice covering on the surface of the cable near the detection device, reduce the burden on the cable after ice covering, reduce the risk of line faults caused by ice covering, ensure the stability of power transmission, save manpower and material costs, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structure view of the present invention.

[0015] Figure 2 It is a structural section Figure 1 and partial enlarged view of the present invention.

[0016] Figure 3 It is a structural section Figure 2 .

[0017] Figure 4 It is a schematic diagram of the internal structure of the early warning detection and positioning lower body, side box and highly resistant airbag of the present invention.

[0018] Figure 5 It is a schematic diagram of the internal structure of the early warning detection and positioning lower body and side box of the present invention.

[0019] Figure 6 It is a sectional view and partial enlarged view of the highly resistant airbag of the present invention after flipping.

[0020] In the figure: 1. Upper structure for cable detection and positioning; 2. Lower structure for cable detection and positioning; 21. Lower body for warning detection and positioning; 211. Worm; 212. Worm ring ratchet; 213. Camshaft body; 214. Piston air pump rod; 215. Air spring; 216. Ice-breaking liquid path; 217. Screw belt rod; 218. Ice-breaking hammer; 219. Screw hole plate; 22. Side box; 221. Wind wheel; 222. Driving bevel gear; 223. Driven bevel gear; 23. High-resistant airbag; 231. Telescopic air pipe; 2311. Intake one-way air valve; 2312. Exhaust one-way air valve; 232. Protective cover; 233. Jet cover; 234. Liquid pipe; 2341. Liquid return spring; 235. Hydraulic piston rod; 2351. Connecting pipe. Specific implementation mode

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1 to 6 , the present invention provides a technical solution for a power network transmission line cable detection device and its system: A power network transmission line cable detection device includes: The upper structure 1 for cable detection and positioning has a semi-cable hole for cable access at the central position of the lower surface; The lower structure 2 for cable detection and positioning has a semi-cable hole on the upper surface corresponding to the cable hole of the upper structure 1 for cable detection and positioning, which can be aligned to form a complete cable hole, and can be docked with the upper structure 1 for cable detection and positioning and clamped and fixed on the cable surface by bolts.

[0023] The lower structure 2 for cable detection and positioning includes a warning detection and positioning lower body 21. On the left position of the front side and the right position of the rear side of the warning detection and positioning lower body 21, side boxes 22 are connected by bolts. The side box 22 is an arched box body, and at the center position of the upper surface, it is rotatably connected with a wind wheel 221 through a bearing seat. And the rotating shaft of the wind wheel 221 extends downward and penetrates into the interior of the side box 22 and is fixed to a driving bevel gear 222 rotatably arranged inside the side box 22. Below the driving bevel gear 222 inside the side box 22, it meshes and drives with a driven bevel gear 223 also rotatably arranged inside the side box 22. The rotating shaft of the driven bevel gear 223 extends linearly in the direction of the warning detection and positioning lower body 21, and after passing through the interior of the side box 22, it extends into the interior of the warning detection and positioning lower body 21 and is connected with a worm 211 rotatably arranged directly below the wire hole inside the warning detection and positioning lower body 21 through a coupling, realizing coaxial linkage with the driven bevel gear 223. The thread direction of the worm 211 is adjusted according to the direction of the same forward or backward rotation of the camshaft body 213 by the worm ring ratchet 212. The upper side of the worm 211 is in thread transmission with the worm ring ratchet 212 rotatably arranged inside the warning detection and positioning lower body 21. The worm ring ratchet 212 is composed of a ratchet and a worm ring rotatably sleeved on the ratchet, and the ratchet is set to be stressed when rotating forward or backward in the same direction. Among them, the rotating shafts of the ratchets extend in opposite directions along the cable direction, and the shaft ends are connected with the camshaft body 213 rotatably arranged inside the warning detection and positioning lower body 21 through couplings and jointly drive the camshaft body 213 to rotate. A number of piston air injection rods 214 are arranged in rolling contact with the lower side of the camshaft body 213, and the piston air injection rods 214 are arranged in a radial array along the camshaft body 213. The upper end of the piston air injection rod 214 is provided with a rolling ball in rolling contact with a ball seat, and the piston air injection rod 214 is integrally provided with a limited sleeve plate in the middle position of the rod body. And a gas injection spring 215 with the upper end fixed to the sleeve plate is sleeved on the lower side of the rod body sleeve plate. The gas injection spring 215 is located in a compression chamber pre-opened inside the warning detection and positioning lower body 21, and the lower end of the gas injection spring 215 is fixed to the bottom wall of the compression chamber, and thus the piston air injection rod 214 can be quickly reset after moving downward. The rod body of the piston air injection rod 214 extends downward and penetrates into a telescopic air pipe 231 fixed inside a high-strength air bag 23 through the warning detection and positioning lower body 21, and a piston is integrally arranged at the end penetrating into the interior of the telescopic air pipe 231. The telescopic air pipes 231 are provided in correspondence with the same number as the piston air injection rods 214, and the pipe body of the telescopic air pipe 231 is composed of a solid pipe fixed to the upper and lower inner walls of the high-strength air bag 23 and a telescopic pipe integrally connecting the two solid pipes. And an intake one-way air valve 2311 and an exhaust one-way air valve 2312 are hermetically installed at the lower end and the side surface of the lower solid pipe respectively. Among them, the lower end of the intake one-way air valve 2311 penetrates into a groove body pre-opened on the bottom surface of the high-strength air bag 23 and opening to the outside,Moreover, a protective cover 232 for protecting and isolating the intake one-way air valve 2311 is fixedly arranged at the bottom surface of the high-strength airbag 23 corresponding to the position of the intake one-way air valve 2311. Jet covers 233 are connected by bolts at the four corner positions of the bottom surface of the high-strength airbag 23. A through hole is provided inside the high-strength airbag 23 at the position of the jet cover 233, and a pressure relief valve is assembled at the position of the through hole.

[0024] When the air flow passes through the wind wheel 221, the wind wheel 221 rotates driven by the air flow, coaxially drives the driving bevel gear 222, the driving bevel gear 222 drives the driven bevel gear 223, the driven bevel gear 223 drives the worm 211 to rotate through a coupling, the worm 211 drives the scroll ratchet 212. If both scroll ratchets 212 rotate in the reverse direction, they will rotate idly. If one or both rotate in the same direction, it will drive the camshaft body 213. When the camshaft body 213 rotates, it intermittently pushes the piston air pump rod 214 according to the cam radian, and cooperates with the air pump spring 215 to make it reciprocate up and down. When the piston air pump rod 214 moves up and down, the lower piston moves along the wall of the telescopic air pipe 231. When moving down, it compresses the air in the pipe. After reaching the pressure relief interval of the outlet one-way air valve 2312, the gas is discharged into the high-strength airbag 23; when moving up, a negative pressure appears in the pipe. After reaching the specified interval, the external air pressure makes the intake one-way air valve 2311 open for air supplement. The air pressure in the high-strength airbag 23 increases. When reaching the pressure relief interval of the jet cover 233, the gas sprays out from the four corners, reducing the gravity burden on the cable increased by the cable detection device. This process continues with the reciprocating movement of the piston air pump rod 214.

[0025] In summary, through the settings of the wind wheel 221, driving bevel gear 222, driven bevel gear 223, worm 211, scroll ratchet 212, camshaft body 213, piston air pump rod 214, air pump spring 215, telescopic air pipe 231, intake one-way air valve 2311, outlet one-way air valve 2312, high-strength airbag 23 and jet cover 233, the kinetic energy of the air flow can be converted into the reciprocating movement of the piston air pump rod 214, and then the air is compressed to inflate the high-strength airbag 23. When the air pressure in the high-strength airbag 23 reaches the pressure relief interval of the pressure relief valve of the jet cover 233, the gas sprays out from the four corners, generating an upward thrust. By using this air-pushing effect, the gravity burden on the cable increased after the installation of the power network transmission line cable detection device is intermittently reduced, avoiding the continuous formation of static load on the cable and the tower structure by the mass of the detection device body, effectively improving the safety margin of large-span and high-tension transmission lines. In addition, the air flow generated by jetting at the bottom of the device, while changing the air turbulence state, also keeps the high-strength airbag 23 in an active state, reducing the attachment of supercooled water droplets at the bottom of the device and avoiding the formation of ice prism structures. This reduces the synergistic weight gain effect generated when the cable body and the detection device are both covered with ice, reduces the increase in ice load of a single tower, and greatly reduces the risk coefficient of cable breakage of the line.

[0026] As an embodiment of the present invention, as shown in Figure 6 the figure, between two jet covers 233 arranged front and back inside the high-resistant airbag 23, two liquid pipes 234 are fixedly arranged, and a liquid return spring 2341 is fixedly arranged below the interior of the liquid pipe 234. The upper end of the liquid return spring 2341 is fixed to a hydraulic piston rod 235 that is slidably sealed inside the liquid pipe 234. The upper end of the hydraulic piston rod 235 extends out of the liquid pipe 234 and is fixed to the upper wall of the high-resistant airbag 23. A liquid hole with a specified aperture is opened at the axis of the hydraulic piston rod 235. The liquid holes of the two hydraulic piston rods 235 are fixedly communicated at the upper end through a communication pipe 2351. The communication pipe 2351 is a T-shaped three-way pipe, and one of the pipe ends extends out of the high-resistant airbag 23 and is communicated with ice-breaking liquid paths 216 opened on the left and right sides inside the early warning detection and positioning lower body 21. The ice-breaking liquid paths 216 are in the same plane as the cable holes. A spiral belt rod 217 is slidably sealed inside the expanding horizontal pipe above it. One end of the spiral belt rod 217 spirally passes through a butterfly screw hole plate 219 fixed at the upper port of the ice-breaking liquid path 216 to the outside of the early warning detection and positioning lower body 21 and is fixed to an ice-breaking hammer 218 arranged below the cable. The ice-breaking hammer 218 can be set as any one or a combination of a dumbbell shape, a cam shape, an umbrella shape, etc. according to actual needs.

[0027] In winter, the active high-resistant airbag 23 can not only reduce the icing on its own lower surface and avoid rain, snow and ice covering, but its expansion and contraction will also drive the hydraulic piston rod 235 to slide up and down on the inner wall of the liquid pipe 234, sucking and pressing the anti-freezing safety liquid in the pipe. Among them, when sucking, the liquid pipe 234 and the hydraulic piston rod 235 move in the opposite direction, and the space increases. The anti-freezing safety liquid in the ice-breaking liquid path 216 enters the liquid pipe 234 through the communication pipe 2351. The reduction in the liquid volume causes the spiral belt rod 217 to rotate under the hydraulic action through the screw hole plate 219, driving the ice-breaking hammer 218 to strike the ice covering on the cable surface. When pressing, the liquid in the liquid pipe 234 acts on the piston end of the spiral belt rod 217 through the communication pipe 2351 and the ice-breaking liquid path 216, causing it to slide outwards spirally along the inner wall of the ice-breaking liquid path 216 through the screw hole plate 219, also driving the ice-breaking hammer 218 to remove ice, reducing the ice covering burden on the cable and the cleaning workload.

[0028] In summary, through the settings of the high-strength airbag 23, hydraulic piston rod 235, liquid pipe 234, double-liquid spring 2341, connecting pipe 2351, ice-breaking liquid path 216, spiral belt rod 217, screw hole plate 219, and ice-breaking hammer 218, the expansion and contraction of the high-strength airbag 23 can drive the hydraulic piston rod 235 to slide up and down in the liquid pipe 234. By means of sucking and pressing the anti-freezing safety liquid in the liquid pipe 234, the spiral belt rod 217 is driven to rotate and drive the ice-breaking hammer 218 to move, hitting the ice and snow attached to the surface of the cable. This active de-icing method can timely remove the ice covering on the surface of the cable near the detection device, reduce the burden on the cable after icing, lower the risk of line failure caused by icing, ensure the stability of power transmission, save labor and material costs, and improve work efficiency.

[0029] Working principle: During operation, first, according to the operating instructions and technical requirements of the power network transmission line cable detection device, determine the installation position and method of the power network transmission line cable detection device. Generally speaking, the power network transmission line cable detection device should be installed at the key nodes of the power network transmission line to facilitate the detection of the entire network. Perform the installation operation according to the installation instructions of the power network transmission line cable detection device, including fixing the device, connecting the cables, etc. After installation, test and debug the power network transmission line cable detection device to ensure that the power network transmission line cable detection device operates normally and has the functions of detection warning and fault location. During use, when there is airflow passing through the wind wheel 221, the wind wheel 221 will rotate driven by the airflow. Then, the rotating wind wheel 221 will coaxially drive the driving bevel gear 222 to rotate, and cooperate with the driving bevel gear 222 to meshingly drive the driven bevel gear 223. The rotating driven bevel gear 223 will coaxially drive the worm 211 to rotate through the coupling. Then, the rotating worm 211 will rotationally drive the upper side ring ratchet 212. At this time, if both ring ratchets 212 rotate in the reverse direction of the force, the ring ratchets 212 will idle. If one or both of them rotate in the direction of the force, the rotating ring ratchets 212 will synchronously drive the camshaft body 213 to rotate. The rotating camshaft body 213 will intermittently push the piston air pump rod 214 downward according to the arc path of the cam during rotation, and cooperate with the air pump spring 215 to make it continuously perform reciprocating up and down movements. During the up and down movement of the piston air pump rod 214, the piston at its lower end will move up and down along the inner wall of the telescopic air pipe 231. Among them, when moving downward along the inner wall, the piston air pump rod 214 will compress the air drawn into the telescopic air pipe 231. After being compressed to the specified air pressure, it reaches the pressure relief interval of the outlet check valve 2312. Then, the outlet check valve 2312 will discharge the compressed gas inside the telescopic air pipe 231 into the high-strength airbag 23 to inflate the inside of the high-strength airbag 23. When moving upward along the inner wall, as the internal space of the telescopic air pipe 231 increases, without gas replenishment inside the telescopic air pipe 231, a negative pressure environment will appear inside the telescopic air pipe 231. Then, when the negative pressure environment reaches the specified interval, the external air pressure will press the inlet check valve 2311 to open, and then the gas will enter the telescopic air pipe 231 through the inlet check valve 2311 for air replenishment. The air injected into the high-strength airbag 23 will gradually cause the high-strength airbag 23 to expand, and the air pressure inside the high-strength airbag 23 will rapidly increase. After the air pressure inside the high-strength airbag 23 reaches the pressure relief interval of the pressure relief valve of the jet hood 233, the gas inside the high-strength airbag 23 will be ejected downward from the four corners through the jet hood 233. In this way, by using the effect of jetting, intermittently reduce the gravity burden added to the cable after the installation of the power network transmission line cable detection device. During this process, it will continue to execute when the piston air pump rod 214 reciprocates;If it is winter, the highly resistant airbag 23 in the active state can also effectively reduce the icing problem on the lower surface in winter, avoiding the icing of rain and snow on the lower surface of the highly resistant airbag 23. At the same time, the highly resistant airbag 23 in the expanded and telescopic active state will synchronously drive the hydraulic piston rod 235 to slide up and down along the inner wall of the liquid pipe 234, and during the sliding process, it will suck and compress the antifreeze safety liquid stored inside the liquid pipe 234. Among them, during suction, as the liquid pipe 234 and the hydraulic piston rod 235 move in opposite directions, while stretching the double liquid spring 2341, the space inside the liquid pipe 234 will increase, and then the antifreeze safety liquid inside the ice-breaking liquid path 216 will enter the inside of the liquid pipe 234 through the connecting pipe 2351 by the hydraulic piston rod 235. As the antifreeze safety liquid is pumped into the inside of the liquid pipe 234, the liquid inside the ice-breaking liquid path 216 will rapidly decrease, and then the spiral rod 217 will be driven to rotate spirally through the screw hole plate 219 under hydraulic action. The rotating screw hole plate 219 will, during the moving process, swing the ice-breaking hammer 218 to strike the ice and snow attached to the surface of the cable, removing the ice covering the cable surface near the cable of the power network transmission line cable detection device, thereby reducing the burden on the cable after icing and reducing the workload of cleaning the cable after icing. And during compression, it will make the antifreeze safety liquid inside the liquid pipe 234 act on the piston end of the spiral rod 217 along the connecting pipe 2351 and the ice-breaking liquid path 216, and compress the spiral rod 217 to slide spirally outward along the inner wall of the ice-breaking liquid path 216 through the screw hole plate 219. During the rotating and sliding process of the spiral rod 217, it cooperates with the ice-breaking hammer 218 to strike the ice and snow attached to the surface of the cable, thereby performing the ice removal operation.

[0030] A power network transmission line cable detection system mainly consists of an upper cable detection and positioning structure 1, a lower cable detection and positioning structure 2, and a detection center. Among them, the upper cable detection and positioning structure 1 and the lower cable detection and positioning structure 2 are installed on the cable of the overhead distribution line by a wire clamping structure, and can detect and collect the high-frequency fault current, fault traveling wave current, and ground electric field signal generated by the line fault in real time, and upload them to the detection center through a wireless network. Among them, the upper cable detection and positioning structure 1 and the lower cable detection and positioning structure 2 are equipped with several sensors. Taking the DS18B20 digital temperature sensor as an example, it can monitor the temperature change of the cable caused by current transmission in real time. Once the temperature exceeds the normal range, it means that there may be potential hazards such as current overload or poor contact. Taking the SCA100T-D02 stress sensor as an example, it constantly senses the external forces acting on the cable from its own weight, wind force, icing, etc. Once the stress is abnormal, the system will detect that the cable may face the risks of stretching, breaking, or tower inclination. Taking the OV2710 image sensor as an example, it captures the appearance of the cable and uses image recognition technology to identify whether there are damages, foreign object entanglements, etc. on the cable; The data collected by these sensors are transmitted to the detection center in real time. After analysis and comparison, once abnormal data are found, the system will immediately issue a warning to prompt the operation and maintenance personnel to handle it in a timely manner, thus effectively ensuring the stable operation of the power network transmission line cables.

[0031] It should be noted that the ice breaker 218 will not come into contact with the cable; the structures of the spiral rod 217 and the screw hole plate 219 are similar to those of the flying fairy toy; the wind wheel 221 can be replaced by other impellers more suitable for use in winter.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A power network transmission line cable detection device, comprising: The cable detection and positioning upper structure (1) has a half-line hole at the center of the lower surface for cable access; The cable detection and positioning lower structure (2) is also provided with a half-wire hole on the upper surface corresponding to the wire hole of the cable detection and positioning upper structure (1) to form a complete cable hole, and can be connected with the cable detection and positioning upper structure (1) and fixed on the cable surface by bolts, and is characterized by: The cable detection and positioning lower structure (2) comprises an early warning detection and positioning lower body (21), and side boxes (22) are fixed to the front and rear sides of the early warning detection and positioning lower body (21), and the upper surface of the side box (22) cooperates with the bearing seat to be rotatably connected to the wind wheel (221), and the rotating shaft of the wind wheel (221) cooperates with the driving bevel gear (222) and the driven bevel gear (223) to perform meshing transmission, and the rotating shaft of the driven bevel gear (223) cooperates with the coupling to be connected with the worm (211) rotatably arranged inside the early warning detection and positioning lower body (21), and cooperates with the worm (211) to be rotatably arranged inside the early warning detection and positioning lower body (21). The worm ring ratchet (212) inside the lower body (21) performs worm gear transmission, the rotating shaft end of the worm ring ratchet (212) cooperates with a coupling to be connected with a cam shaft body (213) rotatably arranged inside the lower body (21) of the early warning detection positioning device, and a plurality of piston pumping rods (214) are arranged on the lower side of the cam shaft body (213) in rolling contact, and the piston ends of the piston pumping rods (214) are inserted into a telescopic air pipe (231) fixed inside the high-resistance air bag (23), and the lower end and side of the telescopic air pipe (231) are sealed and installed with an air inlet one-way air valve (2311) and an air outlet one-way air valve (2311). 312), the four corners of the bottom surface of the high-resistance airbag (23) are connected to the jet covers (233) by bolts, the interior of the high-resistance airbag (23) is fixedly provided with two liquid pipes (234) between the two jet covers (233) arranged at the front and rear, and a restoring spring (2341) is fixedly provided at the lower part of the interior of the liquid pipe (234), and the upper end of the restoring spring (2341) is fixed to the hydraulic piston rod (235) provided with a sliding seal inside the liquid pipe (234), and the upper end of the hydraulic piston rod (235) extends out of the liquid pipe (234) and is fixed to the upper wall of the high-resistance airbag (23), and The two hydraulic piston rods (235) have internally opened liquid holes which are fixedly connected at the upper ends through a connecting pipe (2351); the upper ends of the connecting pipes (2351) are connected to ice-breaking fluid paths (216) opened on the left and right sides of the early warning detection and positioning lower body (21); a spiral rod (217) is provided as a sliding seal inside the expansion transverse tube above the ice-breaking fluid path (216); and one end of the spiral rod (217) is spirally passed through a butterfly screw hole plate (219) fixed at the upper end of the ice-breaking fluid path (216) to the outside of the early warning detection and positioning lower body (21), and is fixed to an ice-breaking hammer (218) provided below the cable.

2. A power network transmission line cable detection device according to claim 1, characterized in that: The spiral direction of the worm (211) is adjusted according to the direction in which the cam shaft (213) rotates forward or backward in the same direction as the worm ring ratchet (212).

3. A power network transmission line cable detection device according to claim 1, characterized in that: The worm ring ratchet (212) is composed of a ratchet and a worm ring rotatably sleeved on the ratchet, and the ratchet is arranged to rotate in the same direction under force, wherein the rotating shafts of the ratchet extend towards each other along the cable direction.

4. The power network transmission line cable detection device according to claim 1, characterized in that: The upper end of the piston pumping rod (214) is provided with a rolling ball in cooperation with the ball seat, and the piston pumping rod (214) is provided with a limited sleeve plate in an integral manner at the middle position of the rod body, and the lower side of the rod body sleeve plate is provided with a pumping spring (215) whose upper end is fixed to the sleeve plate, and the pumping spring (215) is located in a compression chamber pre-opened inside the early warning detection positioning lower body (21), and the lower end of the pumping spring (215) is fixed to the bottom wall of the compression chamber.

5. The power network transmission line cable detection device according to claim 1, characterized in that: The telescopic air tubes (231) are arranged in a corresponding number to the piston pumping rods (214), and the tube body of the telescopic air tube (231) is composed of a solid tube fixed to the upper and lower inner walls of the high-resistance air bag (23) and a telescopic tube that connects the two solid tubes as a whole.

6. The power network transmission line cable detection device according to claim 1, characterized in that: The lower end of the air intake one-way valve (2311) penetrates into a groove body pre-opened on the bottom surface of the high-resistance airbag (23) and open to the outside, and a protective cover (232) for protecting and isolating the air intake one-way valve (2311) is fixedly arranged on the bottom surface of the high-resistance airbag (23) at a position corresponding to the air intake one-way valve (2311), and a through hole is opened inside the high-resistance airbag (23) at the position of the jet cover (233), and a pressure relief valve is installed at the position of the through hole.

7. A power network transmission line cable detection system, using the power network transmission line cable detection device according to any one of claims 1 to 6, characterized in that: The invention mainly consists of a cable detection and positioning upper structure (1), a cable detection and positioning lower structure (2) and a detection center, wherein the cable detection and positioning upper structure (1) and the cable detection and positioning lower structure (2) are installed on the cables of the overhead distribution line by adopting a clamping structure, and can detect and collect high-frequency fault current and fault traveling wave current and ground electric field signals generated by line faults in real time, and upload them to the detection center via a wireless network.

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