Damage positioning device based on low-voltage pulse technology

Abstract

The invention belongs to the technical field of low-voltage pulse type cable fault detection, and particularly relates to a damage positioning device based on a low-voltage pulse technology. The device comprises a box body with a box cover, the box body is internally provided with a low-voltage pulse type cable fault detector, a box opening of the box body is provided with a top plate, the box cover is internally provided with a first clamping block and a second clamping block, and the clamping surfaces of the first clamping block and the second clamping block are both provided with half channels. The two half channels form a channel for a cable to pass through, and one end of the first clamping block and / or the second clamping block is provided with a coupling capacitor; two first supporting legs and a second supporting leg are hinged to the bottom of the box body, and each first supporting leg comprises a first upper supporting block and a first lower supporting block. On the basis of the prior art, a function of measuring the propagation velocity of the low-voltage pulse in the to-be-measured cable is added, and a foundation is laid for the low-voltage pulse type cable fault detector to output an accurate result.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage pulse cable fault detection, and in particular relates to a damage locating device based on low-voltage pulse technology. Background Art

[0002] At present, in the cable fault detection technology, the application of low-voltage pulse technology is increasing (commonly known as cable fault pulse detector, sometimes also called low-voltage pulse cable fault detector in the industry). The technology can test the high-resistance flashover fault, short circuit, open circuit and poor contact of the cable. The principle of the cable fault pulse detector is: send a set low-voltage pulse voltage to the cable under test. After the cable fault pulse detector receives the signal, it automatically displays the waveform and data on the large-screen LCD display, and the fault judgment is intuitive.

[0003] Common technologies include patent application number: CN202310184143.1, patent name: High-voltage power fault location system and method based on low-voltage pulse method. This patented technology includes an automatic clamping and transposition device for faulty cables, a cable fault pulse detector, and a pulse waveform recognition module based on image recognition. The automatic clamping and transposition device for faulty cables is used to conveniently connect high-voltage cables in the air to the cable fault pulse detector, and the various electrical components of the entire system can be controlled through the handheld pulse waveform recognition module on the ground. The pulse waveform can be automatically recognized under the action of the image AI chip, which solves the inconvenience of high-altitude cable fault detection and greatly improves the efficiency and accuracy of high-voltage cable fault location.

[0004] The above patented technology mainly improves the operating environment based on the use of mature cable fault pulse detectors to facilitate cable fault detection at high altitudes. However, it does not consider how to fix the equipment at high altitudes and the use of wireless signals for signal transmission during high-altitude detection. Factors such as wind resistance will affect the transmission quality and efficiency. At the same time, there is basically natural wind at high altitudes. If the equipment is not fixed stably or the cable clamp is loose, staff will need to go up to deal with it, which will cause physical exhaustion for the staff.

[0005] The low-voltage pulse detection method is a technology used for cable fault detection. Its basic principle is to use the phenomenon that the electric pulse signal encounters an impedance mismatch point in the cable line to generate a pulse signal reflection. When the pulse signal propagates to the fault point or other impedance mismatch points, such as a short circuit point, a break point or an intermediate joint, a reflected wave is generated, which is then sent back to the measurement point and recorded by the instrument. By measuring the time difference between the transmitted pulse and the reflected pulse, combined with the known propagation speed of the pulse in the cable, the position of the fault point from the measurement point can be calculated. The pulse cable fault tester is a detection instrument made using this principle. It inputs an electric pulse at the cable port, records the time difference Δt from the start of the electric pulse input to the reflection back to the port, and manually inputs the propagation speed V of the electric pulse in the cable. The instrument can calculate the distance L = VΔt / 2 between the fault point and the port. Therefore, in order to measure the distance between the fault point and the cable port, it is necessary to first know the propagation speed of the electric pulse in the cable. The propagation speed of the pulse signal in the cable is determined by the insulating medium of the cable and has almost nothing to do with the internal conductors and geometric dimensions of the cable. In commonly used cross-linked polyethylene (XLPE) cables, the pulse propagation velocity is about 172m / μs, while in polyvinyl chloride (PVC) cables, the pulse propagation velocity is about 184m / μs. This velocity usually changes due to the following factors:

[0006] 1. As time goes by, cables will age, especially at high altitudes and underground. Under these external factors, the physical properties of the cable's insulating medium will change.

[0007] 2. In this era of rapid technological development, it is very likely that multiple types of cables will appear, and sometimes there will be problems with confusion identification.

[0008] When the above two factors occur, the speed may not be at the original factory value. If it is still calculated based on the factory value, it will affect the output result of the cable fault pulse detector, causing inconvenience to the later construction.

[0009] 3. Cables produced by different manufacturers, although of the same model, will have different radio wave propagation velocities due to differences in process and dielectric formulation. If the average radio wave propagation velocity given by the instrument is used directly, it will cause certain test errors. Summary of the invention

[0010] The purpose of the present invention is to provide a damage locating device based on low-voltage pulse technology, which has the function of verifying the propagation speed of low-voltage pulse in the cable, laying a foundation for the low-voltage pulse cable fault detector to output accurate results.

[0011] The damage locating device based on low-voltage pulse technology comprises a box body with a box cover, a low-voltage pulse cable fault detector is installed in the box body, a top plate is installed at the box opening of the box body, a hole is opened on the top plate for exposing the display screen on the low-voltage pulse cable fault detector, a first clamping block and a second clamping block in a clamping fit are arranged in the box cover, half channels are opened on the clamping surfaces of the first clamping block and the second clamping block along the length direction, and the two half channels constitute a channel for the cable to pass through, a coupling capacitor for forming an electric field around the cable is installed at one end of the first clamping block and / or the second clamping block, and a storage assembly for storing the first clamping block and the second clamping block is arranged on the inner surface of the box cover;

[0012] One side of the box cover is hinged to the box body, and two first supporting legs and one second supporting leg are hinged to the bottom of the box body. The second supporting leg is located at the bottom of the box body near the hinged joint between the box cover and the box body.

[0013] Furthermore, the first supporting leg includes a first upper supporting block and a first lower supporting block, one end of the first upper supporting block is hinged on the bottom of the box body, and the other end is extended outwardly with an insert block, and one end of the first lower supporting block is provided with an insertion groove for inserting the insert block; a first circular groove is provided in the first upper supporting block inside the insert block, and a second circular groove is provided in the first lower supporting block inside the insert groove, and a freely rotating shaft is installed in the first circular groove and the second circular groove, and a through groove is provided in the first upper supporting block from the first circular groove to the second circular groove and the first lower supporting block from the second circular groove to the first circular groove, the two through grooves are connected, and nylon belts are independently passed through the through grooves, one end of the nylon belt is fixed on the rotating shaft in the first circular groove, and the other end is fixed on the rotating shaft in the second circular groove; a first locking component for locking the rotating shaft after rotation is installed between the first upper supporting block and the first lower supporting block and the corresponding rotating shaft respectively.

[0014] The design of the box can further protect the low-voltage pulse cable fault detector. When the low-voltage pulse cable fault detector is installed, a buffer layer can be added between the low-voltage pulse cable fault detector and the box. The design of the storage component facilitates the collection of the first clamping block and the second clamping block. The coordinated design of the first clamping block, the second clamping block and the coupling capacitor can be used to measure the actual propagation speed of the low-voltage pulse in the faulty cable, laying a good foundation for the effective detection of the low-voltage pulse cable fault detector. The design of the first support leg and the second support leg facilitates the use of the box. When using it, if it is ground or underground operation, the first support leg and the second support leg can be erected, and then a simple support structure of a triangular structure can be formed, which is convenient for the staff to operate. There is no need to squat to operate or find other objects to pad the box, saving time and effort. With the coordinated design of the first upper support block, the first lower support block, the nylon belt, the rotating shaft and the first locking assembly, the box can be fixed to the iron tower during high-altitude operations. When fixing, the first upper support block and the first lower support block are separated, and the box body is fixed to the angle steel in the iron tower through the nylon belt. When working on the ground or underground, the insert block on the first upper support block is inserted into the insert groove on the first lower support block, and then the rotating shaft is rotated to tighten the nylon belt, and then locked through the first locking assembly. At this time, the first upper support block and the first lower support block form a whole, which can be used as a support leg.

[0015] Furthermore, the second supporting leg includes a second upper supporting block and a second lower supporting block, one end of the second upper supporting block is hinged to the bottom of the box body, and one side of the other end is hinged to one side of one end of the second lower supporting block, and a second locking component is installed at the hinged joint between the second upper supporting block and the second lower supporting block for locking when the second upper supporting block and the second lower supporting block are in a straight line; when the box cover is opened, the second lower supporting block can support the top of the box cover to keep the box cover in a horizontal state.

[0016] The second supporting leg designed in cooperation with the second upper supporting block and the second lower supporting block can support the box cover to be level when in high altitude, so as to facilitate the operation of the first clamping block and the second clamping block when in use.

[0017] Furthermore, a fixing column is fixed to the movable end of the second lower supporting block, and a second clamping block which is snap-fitted with the fixing column is installed on the top surface of the box cover.

[0018] The coordinated design of the fixing column and the second clamping block can prevent the box cover from being blown over by wind.

[0019] Furthermore, a first clamping block for clamping the first lower supporting block is installed at the bottom of the box.

[0020] The coordinated design of the first clamping block and the first lower supporting block facilitates the fixation with the angle steel. When fixing, you only need to press the bottom of the box onto the corresponding angle steel (there are many angle steels for iron towers, including horizontal, longitudinal and inclined ones, which are selected according to on-site operations), and then bypass the angle steel with a nylon belt. The first lower supporting block is inserted into the first clamping block, and then the shaft is rotated. After the nylon belt is tightened to fix the angle steel and the box relatively, it is locked by the ratchet mechanism.

[0021] Furthermore, the first clamping block and the second clamping block are both I-shaped structures, wherein bolts are hinged at the four ends of the first clamping block, and through holes for the screw rods of the bolts to pass independently are opened at the four ends of the second clamping block through the bolts.

[0022] Under the design of the first clamping block and the second clamping block of the "I"-shaped structure, the isospeed measuring cable can be constrained to a certain extent through the fixing cooperation of bolts, so that the cable becomes straighter and the measurement accuracy is effectively improved.

[0023] Furthermore, a shading component for blocking light is installed on the top plate around the display screen.

[0024] When working at high altitude, considering that the display screen on the low-voltage pulse cable fault detector may reflect light and be inconvenient to observe, it may be inconvenient if the operator blocks the light with his hands. The design of the shading component effectively solves this problem.

[0025] Furthermore, the shading assembly includes a cover plate, a rear side plate, a left side plate and a right side plate, wherein the bottom of the rear side plate is hinged on the top plate on the rear side of the display screen, the left side plate is softly connected to the left side of the rear side plate, the right side plate is softly connected to the right side of the rear side plate, and the cover plate is softly connected to the top of the rear side plate; a card slot for the left side plate and the right side plate to be inserted is opened on the top plate.

[0026] The above discloses a specific structure of a shading component, which has a simple structure and operation mode, and other existing shading technologies can also be used when applied.

[0027] Furthermore, the storage assembly includes a storage plate, and a storage groove for placing the storage plate is opened inward on the inner side surface of the box cover. The storage plate is installed in the storage groove, and the storage plate is respectively provided with a first placement groove for placing the first clamping block and the second clamping block and a third placement groove for placing part of the shading assembly.

[0028] The above discloses a storage assembly, which has a simple structure and is easy to operate, and other existing storage technologies can also be used in application.

[0029] Furthermore, a shoulder strap is installed on the side wall of the box, one end of the shoulder strap is fixed to the left side wall of the box, and the other end is fixed to the right side wall of the box. At least two first buckles arranged at intervals are installed on the front side wall of the box, and the shoulder strap is buckled with the first buckles.

[0030] The design of the shoulder strap makes it easy to move the box, especially when working at high altitude, the box can be placed diagonally across the worker. If it is on the ground or underground, the shoulder strap can be used as a handle by cooperating with the first buckle. When in use, it can also be designed as a shoulder strap to be carried on the back.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention combines the existing technology of low-voltage pulse cable fault detector, and adds the measurement function of the propagation speed of low-voltage pulse in the measured cable on the basis of the existing technology, laying a foundation for the low-voltage pulse cable fault detector to output accurate results.

[0033] 2. The present invention combines the use environment of the low-voltage pulse cable fault detector on the ground, underground and high in the air, and is designed in coordination with many aspects such as placement on the ground or underground, fixation during high-altitude operations, and storage after operation, so as to facilitate the movement and operation of the low-voltage pulse cable fault detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2 for Figure 1 Rear view structure diagram;

[0036] Figure 3 for Figure 1 AA cross-sectional structure diagram;

[0037] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the middle BB;

[0038] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure of the CC;

[0039] Figure 6 for Figure 4 The enlarged structural diagram at D in the middle;

[0040] Figure 7 for Figure 5 The enlarged structural diagram at E in the middle;

[0041] Figure 8 for Figure 5 The enlarged structural diagram at F in the middle;

[0042] Fig. 9 This is a schematic diagram of the three-dimensional structure of the box cover of the present invention when it is opened;

[0043] Fig.10 It is a schematic diagram of the three-dimensional structure of the box cover of the present invention covering the box body;

[0044] Fig.11 This is a schematic diagram of the structure of the present invention when it is working underground;

[0045] Fig.12 It is a schematic diagram of the structure of the present invention being fixed with the angle steel during high school operation;

[0046] Fig.13 It is a structural schematic diagram when the first clamping block cooperates with the second clamping block;

[0047] Fig.14 It is an exploded view of the present invention.

[0048] The names of the components in the figure are: 1. Box cover; 2. First clamping block; 3. Bolt; 4. Second clamping block; 5. Coupling capacitor; 6. Capacitor interface; 7. Through hole; 8. Box body; 9. Shading component; 9.1. Cover plate; 9.2. Rear side plate; 9.3. Left side plate; 9.4. Right side plate; 10. Card slot; 11. Top plate; 12. First buckle; 13. Shoulder strap; 14. First interface; 15. Second interface; 16. Storage component; 16.1. Storage plate; 16.2. First placement slot; 16.3. Second placement slot; 16.4. Third placement slot Slot; 17, first groove; 18, first supporting leg; 18.1, first upper supporting block; 18.2, ratchet mechanism; 18.3, first lower supporting block; 18.4, convex block; 18.5, first circular groove; 18.6, through groove; 18.7, second circular groove; 19, first clamping block; 20, second clamping block; 21, second supporting leg; 21.1, second upper supporting block; 21.2, second lower supporting block; 21.3, fixing column; 21.4, second buckle; 22, second groove; 23, hinge; 24, rotating shaft; 25, nylon belt. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Example

[0052] The present embodiment describes a damage location device based on low-voltage pulse technology, such as Figures 1 to 14 , comprising a box body 8 with a box cover 1, a low-voltage pulse type cable fault detector is installed in the box body 8, a top plate 11 is installed at the box opening of the box body 8, a hole for exposing the display screen on the low-voltage pulse type cable fault detector is opened on the top plate 11, a first clamping block 2 and a second clamping block 4 in a clamping fit are arranged in the box cover 1, and a half channel (the cross section of the half channel is a V-shaped groove structure) is opened on the clamping surface of the first clamping block 2 and the second clamping block 4 along the length direction, and the two half channels constitute a channel for the cable to pass through, and the first clamping block 2 and / or the second clamping block 4 are provided with a half channel (the cross section of the half channel is a V-shaped groove structure), and the two half channels constitute a channel for the cable to pass through. A coupling capacitor 5 for forming an electric field around the cable is installed at one end of the tightening block 4, and a storage assembly 16 for storing the first clamping block 2 and the second clamping block 4 is provided on the inner surface of the box cover 1. The storage assembly 16 used in this embodiment includes a storage plate 16.1, and a storage groove for placing the storage plate 16.1 is opened inward on the inner side surface of the box cover 1. The storage plate 16.1 is installed in the storage groove, and the storage plate 16.1 is respectively provided with a first placement groove 16.2 for placing the first clamping block 2 and the second clamping block 4 and a third placement groove 16.4 for partially placing the shading assembly 9.

[0053] One side of the box cover 1 is hinged to the box body 8, and two first support legs 18 and a second support leg 21 are hinged at the bottom of the box body 8. The second support leg 21 is located at the bottom of the box body 8 near the hinged cooperation between the box cover 1 and the box body 8. The first support leg 18 includes a first upper support block 18.1 and a first lower support block 18.3. One end of the first upper support block 18.1 is hinged to the bottom of the box body 8, and the other end extends outward with an insertion block. One end of the first lower support block 18.3 is provided with an insertion groove for inserting the insertion block; a first circular groove 18.5 is provided in the first upper support block 18.1 on the inner side of the insertion block, and a second circular groove 18.7 is provided in the first lower support block 18.3 on the inner side of the insertion groove, and a freely rotating shaft 24 is installed in the first circular groove 18.5 and the second circular groove 18.7. A through groove 18.6 is provided in the first upper support block 18.1 from the first circular groove 18.5 to the second circular groove 18.7 and in the first lower support block 18.3 from the second circular groove 18.7 to the first circular groove 18.5. The two through grooves 18.6 are connected to each other. A nylon belt 25 is independently passed through the through groove 18.6. One end of the nylon belt 25 is fixed to the rotating shaft 24 in the first circular groove 18.5, and the other end is fixed to the rotating shaft 24 in the second circular groove 18.7. A first locking assembly for locking the rotating shaft 24 after rotation is installed between the first upper support block 18.1 and the first lower support block 18.3 and the corresponding rotating shaft 24, respectively. In this embodiment, the first locking assembly is a ratchet mechanism 18.2. A first clamping block 19 for clamping the first lower support block 18.3 is installed at the bottom of the box body 8.

[0054] The above Figure 7 As shown, the ratchet mechanism 18.2 is a known technology and is a common mechanical device that allows movement in only one direction and prevents reverse movement. The basic components of the ratchet mechanism 18.2 usually include a ratchet (usually a circular gear with teeth on the edge for meshing with a pawl), a pawl (a component that can move back and forth, which meshes with the teeth of the ratchet and controls the rotation direction of the ratchet) and a torsion spring (provides the necessary force for the pawl to mesh with or disengage the teeth of the ratchet). When installed, the ratchet is installed on the rotating shaft 24, and other structures are correspondingly installed on the outside of the first upper support block 18.1 and the first lower support block 18.3.

[0055] like Figure 3 As shown, the second supporting leg 21 comprises a second upper supporting block 21.1 and a second lower supporting block 21.2, one end of the second upper supporting block 21.1 is hinged at the bottom of the box body 8, and one side of the other end is hinged to one side of one end of the second lower supporting block 21.2, and a second locking assembly is installed at the hinged joint of the second upper supporting block 21.1 and the second lower supporting block 21.2 for locking when the second upper supporting block 21.1 and the second lower supporting block 21.2 are in a straight line state (the second locking assembly here adopts a structure such as a metal box buckle as the second buckle 21.4); when the box cover 1 is opened, the second lower supporting block 21.2 can support the top of the box cover 1 so that the box cover 1 is in a horizontal state, and a fixing column 21.3 is fixed to the movable end of the second lower supporting block 21.2, and a second clamping block 20 for clamping with the fixing column 21.3 is installed on the top surface of the box cover 1; the fixing of the fixing column 21.3 and the second clamping block 20 can refer to the principle of the ball buckle, which is usually used for locking cabinet doors.

[0056] The hinge technology between the second upper support block 21.1 and the box body 8 and the first upper support block 18.1 and the box body 8 adopts the existing hinge 23. The hinge 23 selected in this embodiment is used to limit the angles between the second upper support block 21.1 and the box body 8 and the first upper support block 18.1 and the box body 8 at 0 degrees and 100 degrees. The technology includes a hinge body, a pin and a tension spring; the hinge body is usually composed of two hinge leaves, which are connected by a central axis, and one of the leaves is provided with a slot at the position of 0 degrees and 100 degrees; the pin is limited in the slot by the tension spring to limit or guide the movement of the hinge.

[0057] In order to facilitate the storage of the first supporting leg 18 and the second supporting leg 21, a first groove 17 is opened at the bottom of the box body 8, and a second groove 22 is opened on the left and right groove walls of the first groove 17. The two second grooves 22 are on the same straight line. When installing, Figure 2As shown, the first support leg 18 (specifically the first upper support block 18.1) and the second support leg 21 are both installed in the first groove 17 provided on the bottom surface of the box body 8 through the hinge 23. With the design of the hinge 23, the first support leg 18 and the second support leg 21 can be stored in the first groove 17 when carrying.

[0058] The first clamping block 2 and the second clamping block 4 are both I-shaped structures, wherein bolts 3 are hinged at the four ends of the first clamping block 2, and through holes 7 for the screw rods of the bolts 3 to pass independently are opened at the four ends of the second clamping block 4 through the bolts 3.

[0059] For ease of use, such as Figure 1 As shown, the top plate 11 on the right side of the display screen on the low-voltage pulse cable fault detector is installed with a first interface 14 and a second interface 15. The first interface 14 is an interface for supplying power to the coupling capacitor 5, and its power supply can be set separately or borrowed from the power supply of the low-voltage pulse cable fault detector. The second interface 15 is used for low-voltage pulse transmission on the low-voltage pulse cable fault detector. The low-voltage pulse signal output end on the low-voltage pulse cable fault detector is connected to the second interface 15 signal through a signal line. A second placement groove 16.3 is provided on the storage plate 16.1 corresponding to the first interface 14 and the second interface 15, and the capacitor interface 6 for supplying power to the coupling capacitor 5 is installed on the outside of the second clamping block 4 or the first clamping block 2. In order to facilitate the placement of signal lines and wires, a third placement groove 16.4 is provided on the storage component 16.

[0060] This embodiment further illustrates the technology. A shading component 9 for blocking light is installed on the top plate 11 around the display screen. The shading component 9 in this embodiment includes a cover plate 9.1, a rear side plate 9.2, a left side plate 9.3 and a right side plate 9.4, wherein the bottom of the rear side plate 9.2 is hinged to the top plate 11 on the rear side of the display screen, the left side plate 9.3 is softly connected to the left side of the rear side plate 9.2, the right side plate 9.4 is softly connected to the right side of the rear side plate 9.2, and the cover plate 9.1 is softly connected to the top of the rear side plate 9.2; a card slot 10 for the left side plate 9.3 and the right side plate 9.4 to be inserted is opened on the top plate 11.

[0061] In order to facilitate carrying, the present embodiment has a shoulder strap 13 installed on the side wall of the box body 8, one end of the shoulder strap 13 is fixed to the left side wall of the box body 8, and the other end is fixed to the right side wall of the box body 8, and at least two first buckles 12 arranged at intervals are installed on the front side wall of the box body 8, and the shoulder strap 13 is buckled into engagement with the first buckles 12.

[0062] When carrying equipment over long distances or climbing operations, the shoulder strap 13 can be used as Fig.10As shown, take the device out from the first buckle 12 installed on the front of the box 8, adjust its length, and carry the device diagonally. The length adjustment technology of the shoulder strap 13 can refer to the length adjustment of the existing backpack shoulder strap, and this design will not be described in detail one by one; carrying the device diagonally can distribute the weight of the device more evenly on the body and reduce muscle and joint fatigue.

[0063] When carrying and transferring over short distances, such as Fig. 9 As shown, the strap 13 can be mounted in the first buckle 12. The structure of the first buckle 12 is as shown in FIG. Figure 8 As shown, it is a rectangular frame with an opening on one side, and a wedge-shaped anti-slip protrusion is connected to the opening. When used, other first buckles 12 of the prior art, such as snaps, etc., can also be used; the shoulder strap 13 between the two first buckles 12 is used for hand carrying; when hand carrying, the operator has stronger control over the equipment, and when it does not need to be carried, the equipment can be placed conveniently and quickly.

[0064] In this embodiment, when working on the ground, Fig.11 As shown, the first support leg 18 and the second support leg 21 are opened to 100 degrees through the hinge 23; Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the upper end of the first upper support block 18.1 is embedded in the lower end of the first lower support block 18.3; the ratchet of the ratchet mechanism 18.2 installed on the first upper support block 18.1 and the first lower support block 18.3 is rotated to drive the shaft 24 installed in the through groove 18.6 and the second circular groove 18.7 to rotate, and the nylon belt 25 passes through the through groove 18.6 and is rolled up to the shaft 24 of the second circular groove 18.7 and the first circular groove 18.5, and then the two ends of the nylon belt 25 are tightened to prevent the first lower support block 18.3 from slipping out of the first upper support block 18.1. Figure 2 As shown, the second upper support block 21.1 and the second lower support block 21.2 are aligned to 180 degrees and fixed by the second buckle 21.4.

[0065] When the equipment is operating in a high altitude environment, Fig.12As shown, the bottom of the box body 8 is placed on the angle steel of the power tower so that the angle steel is located in the second groove 22. The first upper support block 18.1 is fitted with the bottom surface of the box body 8 by the self-locking function of the hinge 23 at 0 degrees. The pawl of the ratchet mechanism 18.2 is loosened to make the ratchet of the ratchet mechanism 18.2 in a reversible rotation state, and the first lower support block 18.3 is pulled out, so that the nylon belt 25 passes around the angle steel to clamp the first lower support block 18.3 in the first clamping block 19. The first clamping block 19 is made of flexible material, and the inner side of the top surface is wedge-shaped. Other existing buckle technologies can also be used when applied; the ratchet of the rotating ratchet mechanism 18.2 drives the rotating shaft 24 to rotate, and then tightens the two ends of the nylon belt 25 to fix the equipment on the angle steel; in order to prevent the first lower support block 18.3 from being displaced, a protrusion 18.4 is provided at the end of the first lower support block 18.3, which can prevent the first lower support block 18.3 from slipping out of the first clamping block 19 when tightening the nylon belt 25. The second support leg 21 is opened to 100 degrees and fixed by the hinge 23; the second buckle 21.4 is opened, and the second lower support block 21.2 is rotated along the hinge to embed the fixing column 21.3 into the second block 20; the fixing column 21.3 supports and fixes the box cover 1 to prevent the wind from the rear side from blowing over the box cover 1 and affecting the operation of the operator; the second lower support block 21.2 also plays a certain role in breaking the wind from the rear side, thereby improving the stability of the equipment during high-altitude operations.

[0066] When working in an environment with strong light, Fig.11 As shown, the rear side panel 9.2 is stood up and inserted into the card slot 10 on the rear side of the screen, the rear sides of the rear side panel 9.2 and the right side panel 9.4 are softly connected to the two sides of the rear side panel 9.2 respectively, and the rear side of the cover plate 9.1 is softly connected to the top of the rear side panel 9.2; the left side panel 9.3 and the right side panel 9.4 can be flipped and inserted into the card slots 10 on both sides of the screen for fixation, and the cover plate 9.1 is placed on the top of the left side panel 9.3 and the right side panel 9.4. The shading component 9 can block the strong light on the left and right sides, the rear side and the top of the screen, reduce the direct exposure of the strong light to the screen, reduce the screen reflection, and improve the visibility of the screen; the shading component 9 is made of silicone material, which has good elasticity and can prevent damage to the electronic screen when stored. It is also high temperature resistant and easy to clean, non-toxic and odorless and has no harm to the human body.

[0067] When storing the equipment, Figure 1 and Fig. 9 As shown, a storage assembly 16 is arranged in the box cover 1; the first clamping block 2 and the second clamping block 4 are placed in the first placement groove 16.2 of the storage plate 16.1, and the third placement groove 16.4 is used to place the wire; the storage of the shading assembly 9: first fold the left side plate 9.3 to the front side of the rear side plate 9.2, then flip the right side plate 9.4 to the front side of the left side plate 9.3, and flip the cover plate 9.1 to the rear side of the rear side plate 9.2; finally, fold the stored shading assembly 9 to cover the top plate 11. Fig.10 As shown, the box cover 1 and the box body 8 are hinged, and the box cover 1 is closed to the top surface of the box body 8, and the two are fixed by box buckles. The second placement groove 16.3 can prevent the first interface 14 and the second interface 15 from being squeezed when the box cover 1 is closed.

[0068] When testing the wave velocity of low voltage pulse in the cable, Fig.13 As shown, align the first clamping block 2 and the second clamping block 4 so that their V-shaped grooves clamp the cable, and one end face of the first clamping block 2 and the second clamping block 4 is flush with the end face of the cable, so that the bolt 3 is inserted into the through hole 7 and connected to the second clamping block 4, and the nut is screwed into the bolt 3 to combine the first clamping block 2 and the second clamping block 4 together and clamp the cable to keep the cable straight; install the coupling capacitor 5 in the opening near the end of the second clamping block 4 and fix it with bolts. Connect the first interface 14 and the capacitor interface 6 through a wire to energize the coupling capacitor 5. At this time, a fixed length of the cable is taken and an external electric field is applied to generate a reflection point, which is used to measure the reflection condition when the pulse wave velocity is measured. Avoid the problem that cables produced by different manufacturers, although of the same model, will have different propagation speeds of radio waves due to differences in process and medium formulation.

[0069] In order to measure the pulse propagation speed without losing the length, the main implementation principle of this embodiment is to place a certain distance L from the port in a cable. 0 An artificial and interference-eliminating point is created at the position so that the pulse signal can be reflected back when it is transmitted to this position. The time interval from the signal input to the reflection back to the input point of the low-voltage pulse cable fault detector is Δt 0 , the propagation speed V of the electric pulse in the cable can be calculated 0 =2L 0 / Δt 0 The way to create the interference point is to make it at a distance of L from the cable port. 0 A coupling capacitor is installed on the outer surface of the cable insulation layer at a distance, and the coupling capacitor is energized to generate an electric field, which interacts with the electric field of the electric pulse signal in the cable to generate "mutual impedance", thus creating an impedance mismatch point and causing the electric pulse signal to be reflected back. In this method, the reflection time interval Δt 0 The cable length L of the measuring section is measured by a low-voltage pulse cable fault detector. 0 It is known that the pulse propagation speed can be calculated by a calculation tool (or by adding a calculation function to the low-voltage pulse cable fault detector software), and then the coupling capacitor is removed (or the power is turned off), and the measured speed is input to the low-voltage pulse cable fault detector to measure the distance to the fault point. When applied, this method can also be directly embedded in the low-voltage pulse cable fault detector.

[0070] During fault detection, the second interface 15 is connected to the faulty cable via a signal line, and detection is performed using a low-voltage pulse cable fault detector. The signal line connection method can adopt existing technology, such as using a wire clamp to clamp the signal line between the faulty phase of the faulty cable and the cable sheath.

[0071] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A damage location device based on low-voltage pulse technology, comprising a box (8) with a box cover (1), a low-voltage pulse type cable fault detector is installed in the box (8), a top plate (11) is installed at the box opening of the box (8), and a hole is opened on the top plate (11) for exposing a display screen on the low-voltage pulse type cable fault detector, characterized in that: The box cover (1) is provided with a first clamping block (2) and a second clamping block (4) in a clamping fit, and half channels are provided on the clamping surfaces of the first clamping block (2) and the second clamping block (4) along the length direction, and the two half channels form a channel for the cable to pass through, and a coupling capacitor (5) for forming an electric field around the cable is installed at one end of the first clamping block (2) and / or the second clamping block (4), and a storage assembly (16) for storing the first clamping block (2) and the second clamping block (4) is provided on the inner surface of the box cover (1); One side of the box cover (1) is hinged to the box body (8); two first supporting legs (18) and a second supporting leg (21) are hinged to the bottom of the box body (8); the second supporting leg (21) is located at the bottom of the box body (8) near the hinged joint between the box cover (1) and the box body (8).

2. The damage localization device based on low-voltage pulse technology according to claim 1, characterized in that: The first support leg (18) comprises a first upper support block (18.1) and a first lower support block (18.3); one end of the first upper support block (18.1) is hinged to the bottom of the box body (8), and the other end is provided with an insert block extending outwardly; one end of the first lower support block (18.3) is provided with an insertion groove for inserting the insert block; a first circular groove (18.5) is provided in the first upper support block (18.1) on the inner side of the insert block, and a second circular groove (18.7) is provided in the first lower support block (18.3) on the inner side of the insert groove; a freely rotatable rotating shaft (24) is installed in both the first circular groove (18.5) and the second circular groove (18.7); A through groove (18.6) is provided in the first upper support block (18.1) of the groove (18.7) and the first lower support block (18.3) from the second circular groove (18.7) to the first circular groove (18.5); the two through grooves (18.6) are connected to each other; a nylon belt (25) is independently passed through the through groove (18.6); one end of the nylon belt (25) is fixed to the rotating shaft (24) in the first circular groove (18.5), and the other end is fixed to the rotating shaft (24) in the second circular groove (18.7); and a first locking assembly is installed between the first upper support block (18.1) and the first lower support block (18.3) and the corresponding rotating shaft (24) to lock the rotating shaft (24) after rotation.

3. The damage localization device based on low-voltage pulse technology according to claim 1 or 2, characterized in that: The second supporting leg (21) comprises a second upper supporting block (21.1) and a second lower supporting block (21.2); one end of the second upper supporting block (21.1) is hinged to the bottom of the box body (8), and one side of the other end is hinged to one side of one end of the second lower supporting block (21.2); a second locking assembly is installed at the hinged joint between the second upper supporting block (21.1) and the second lower supporting block (21.2) for locking when the second upper supporting block (21.1) and the second lower supporting block (21.2) are in a straight line; when the box cover (1) is opened, the second lower supporting block (21.2) can support the top of the box cover (1) so that the box cover (1) is in a horizontal state.

4. The damage localization device based on low-voltage pulse technology according to claim 3 is characterized in that: A fixing column (21.3) is fixed to the movable end of the second lower support block (21.2), and a second clamping block (20) which is snap-fitted with the fixing column (21.3) is installed on the top surface of the box cover (1).

5. The damage localization device based on low-voltage pulse technology according to claim 2, characterized in that: A first clamping block (19) for clamping the first lower supporting block (18.3) is installed at the bottom of the box body (8).

6. The damage localization device based on low-voltage pulse technology according to claim 1, characterized in that: The first clamping block (2) and the second clamping block (4) are both of an "I"-shaped structure, wherein bolts (3) are hingedly connected to the four ends of the first clamping block (2), and through holes (7) for the screw rods of the bolts (3) to independently pass through are opened at the four ends of the second clamping block (4) through the bolts (3).

7. The damage localization device based on low-voltage pulse technology according to claim 1, characterized in that: A light shielding component (9) for blocking light is installed on the top plate (11) around the display screen.

8. The damage localization device based on low-voltage pulse technology according to claim 7, characterized in that: The shading assembly (9) comprises a cover plate (9.1), a rear side plate (9.2), a left side plate (9.3) and a right side plate (9.4), wherein the bottom of the rear side plate (9.2) is hinged on a top plate (11) on the rear side of a display screen, the left side plate (9.3) is softly connected to the left side of the rear side plate (9.2), the right side plate (9.4) is softly connected to the right side of the rear side plate (9.2), and the cover plate (9.1) is softly connected to the top of the rear side plate (9.2); and a card slot (10) for the left side plate (9.3) and the right side plate (9.4) to be carded in is provided on the top plate (11).

9. The damage localization device based on low-voltage pulse technology according to claim 8, characterized in that: The storage assembly (16) comprises a storage plate (16.1), a storage groove for receiving the storage plate (16.1) is provided inwardly on the inner side surface of the box cover (1), the storage plate (16.1) is installed in the storage groove, and the storage plate (16.1) is respectively provided with a first placement groove (16.2) for placing a first clamping block (2) and a second clamping block (4) and a third placement groove (16.4) for partially receiving the shading assembly (9).

10. The damage localization device based on low-voltage pulse technology according to claim 1, characterized in that: The side wall of the box body (8) is provided with a shoulder strap (13), one end of the shoulder strap (13) is fixed on the left side wall of the box body (8), and the other end is fixed on the right side wall of the box body (8), and at least two first buckles (12) arranged at intervals are installed on the front side wall of the box body (8), and the shoulder strap (13) is buckled with the first buckles (12).

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