23results about How to "Reduce ground resistance" patented technology

The invention discloses a multi-point grounding current limiting device, and relates to the technical field of power transmission line construction, the multi-point grounding current limiting device comprises a placement frame and further comprises a protection assembly, a grounding rod is fixedly installed at the bottom of the placement frame, a placement plate is fixedly installed on the inner wall of the placement frame, and a placement rod is fixedly installed at the top of the placement plate; lifting equipment is arranged on the circumferential surface of the placement rod, a signal receiver is fixedly mounted at the top of the lifting equipment, a current limiting assembly is arranged at the top of the placement plate, a fusing assembly is arranged at the top of the placement plate, a grounding connecting wire is arranged between the fusing assembly and the current limiting assembly, and a limiting frame is fixedly mounted at the top of the placement plate. According to the grounding current limiting device, the L-shaped plate moves downwards to drive the limiting plate to move downwards, the limiting plate moves downwards to make contact with the grounding connecting wire and extrude and fix the grounding connecting wire, the optimal state of the grounding connecting wire can be kept by avoiding bending or pulling, low grounding resistance is ensured, and therefore the efficiency and safety of the grounding current limiting device are improved.

The application discloses a kind of nuclear power plant deep burying ground connection slender ground electrode installation construction methods, comprising the following steps: temporarily fixed support is fixedly installed on the outer wall of nuclear power plant workshop;Reinforced anchor rod is installed in the backfill layer below the lower end of ground electrode;The body of ground electrode is tied and fixed on temporarily fixed support, and the lower end of ground electrode is tied and fixed on reinforced anchor rod;Ground electrode is accepted for concealed works;From the lower end of ground electrode, backfill is carried out layer by layer upwards, the connection of temporarily fixed support and ground electrode is released layer by layer, and temporarily fixed support at the place is removed;After the height of backfill layer rises to the top end of ground electrode, lightning protection grounding well is installed at the top of ground electrode;Continue backfill until the height of backfill layer and the well lid of lightning protection grounding well are flush.The application solves the problems of complex process, large workload of traditional ground electrode installation construction method, and the problem that ground resistance increases due to the fact that ground electrode and backfill layer are not in close contact, which affects the grounding effect.

The utility model provides a PTC (Positive Temperature Coefficient) heater with a grounding device on a tube body, which comprises a tube body, one or more sheet-shaped PTC heating elements are arranged in the tube body, an upper electrode plate and a lower electrode plate are arranged on the upper plane and the lower plane of each PTC heating element, the outer sides of the upper electrode plate and the lower electrode plate are wrapped by an insulating layer to form a PTC heating core, and the grounding device is arranged on the tube body. And a grounding device is arranged on the outer side surface of the pipe body. Compared with the prior art, the grounding device has the beneficial effects that the grounding screw is directly fixed on the pipe body, the grounding resistance is small, the grounding screw and the sawtooth annular terminal are used for grounding, the loosening problem of the grounding device is prevented, and the grounding reliability of the product is effectively ensured.

The present invention relates to the field of cable technology, and in particular to a low-voltage multi-core mineral insulated cable, comprising a plurality of main cable units, a ground wire unit and an optical fiber unit, wherein the main cable units are arranged around the left and right sides of the optical fiber unit, a first mineral insulation layer is extruded between and around the main cable unit and the optical fiber unit, a second mineral insulation layer is extruded around the first mineral insulation layer, the ground wire unit is coated between the first mineral insulation layer and the second mineral insulation layer, a sheath layer is coated around the second mineral insulation layer, and an outer protective layer is arranged on the outside of the sheath layer. The cable as a whole can be matched and applied to complex and harsh working conditions, and can realize the characteristic of easy bending in one direction during use, and has a large bending radius in other directions, which effectively reduces cable damage caused by random and excessive twisting during cable laying and prolongs its service life.

The utility model provides a portable ground detecting instrument, which belongs to the technical field of meteorological equipment, and comprises a base, a fixed ground anchor, a ground sensor, a wireless communication module and a power supply module, the structural frame is fixedly arranged on the base, the structural frame comprises beam rods which are annularly distributed, and threads are arranged on the beam rods; the lifting platform is arranged on the structural frame in a sleeving manner; the driving motor is installed on the lifting platform, the outer side of the driving end of the driving motor is sleeved with a threaded ring, and the threaded ring is connected with the beam rod in a threaded fit mode; the clamping ring comprises a butt joint piece connected with the driving motor and a first butt joint port connected with the butt joint piece; the sampling pipe comprises a first pipe body, a drill bit arranged at the lower end of the first pipe body and a second butt joint port arranged at the upper end of the first pipe body. The requirement for water content detection during surface soil layer sampling can be met.

The present invention relates to the technical field of grounding protection devices for power grids, and discloses a grounding protection device for smart grids, including a telescopic bracket, two limit assemblies and a conductive bar, wherein the telescopic bracket has two telescopic ends that can move closer to or farther from each other; two limit assemblies are respectively arranged at the two telescopic ends, and the limit assembly includes two limit brackets, which are respectively arranged on both sides of the telescopic bracket and can be rotatably connected to the telescopic bracket. When the limit bracket is rotated to be perpendicular to the telescopic bracket, a limit structure is formed between the limit bracket and the telescopic bracket; the conductive bar is detachably connected to the telescopic bracket; wherein the telescopic bracket, the limit bracket and the conductive bar are all conductive and electrically connected to each other. The telescopic bracket and the limit bracket can be unfolded and folded, and there is no need to fix each component by welding. The telescopic bracket and the limit bracket extending in different directions increase the length of the grounding, which can effectively reduce the grounding resistance.

The invention relates to the technical field of grounding protection devices of power grids, and discloses a grounding protection device for an intelligent power grid, which comprises a telescopic bracket, two limiting assemblies and a conducting bar, and is characterized in that the telescopic bracket is provided with two telescopic ends which can be close to or far away from each other; the two limiting assemblies are arranged at the two telescopic ends correspondingly, each limiting assembly comprises two limiting supports, the two limiting supports are arranged on the two sides of the telescopic support correspondingly and rotationally connected with the telescopic support, and when the limiting supports rotate to be perpendicular to the telescopic support, limiting structures are formed between the limiting supports and the telescopic support; the conducting bar is detachably connected with the telescopic bracket; wherein the telescopic bracket, the limiting bracket and the conducting bar are all conductive and are electrically connected with one another. The telescopic support and the limiting support can be unfolded and folded, and all parts do not need to be fixed through welding. And the telescopic bracket and the limiting bracket which extend along different directions increase the grounding length, so that the grounding resistance can be effectively reduced.

The embodiment of the application discloses a power transmission line tower grounding device and a design method and system thereof, which measures the soil resistivity around the power transmission line tower to determine the grounding resistance limit value of the tower, then determines the side length of the horizontal square frame electrode according to the structural parameters of the tower and the distance between the tower and the horizontal square frame electrode, and finally determines the total length of the horizontal radiation electrode and the number of vertical electrodes according to the side length of the horizontal square frame electrode, the grounding resistance limit value and the soil resistivity, so as to finally determine the structure of the grounding device. According to the design method and system, the length and depth of the horizontal square frame electrode of the power transmission line tower grounding device and the depth of the vertical electrode are not particularly large, and can be constructed by general machinery, so that the cost is effectively reduced, and the grounding resistance of the tower is effectively reduced under the condition of smaller occupied area, so that the back flashover rate of the line is reduced, and the safety performance around the tower is improved.

The present invention discloses a focused coupling electrode for hardened field detection, including a lead, a top cover, a copper cake, an outer shell with upper and lower openings, clay, a bottom seal, and a coupling bag. The top cover is screwed to the upper part of the outer shell through a thread, the bottom seal seals the bottom of the outer shell, the lead passes through the top cover and is welded to the copper cake, so that the copper cake is suspended and fixed on the inner side of the top cover, the clay fills the inner part of the outer shell and the top cover, and the coupling bag filled with clay is sleeved on the bottom of the bottom seal of the outer shell. The outer contour of the top cover and the outer shell is a rotating surface with a parabola as the generatrix and a parabola symmetry axis as the rotation axis. The material of the top cover and the outer shell is organic glass. The copper cake is fixed at the focus position of the parabola, and the geometric center of the copper cake coincides with the focus of the parabola. The present invention designs the outer shell into a rotating surface based on the parabola, and fixes the copper cake electrode at the focus position to realize the focused power supply of the current to improve the detection resolution. There is no need to drive the electrode into the ground, and it can be directly placed in the corresponding position, which greatly improves the work efficiency.

The present application relates to a ground current dissipation module and a ground grounding device, which include: a flexible conductive layer, which is used to be laid on the ground soil; a pressure plate, which is arranged above the flexible conductive layer and has conductivity, so as to press the flexible conductive layer to the soil layer close to the ground; and a power connection piece, which is arranged on the top surface of the pressure plate and electrically connected to the pressure plate, and is used to connect the equipotential connection line. The flexible conductive layer and the pressure plate both have good conductive effects. When the two are placed on the ground, they are electrically connected to each other and connected to the ground soil at the same time. In addition, the pressure-attached setting of the pressure plate enables the flexible conductive layer to be in close contact with the ground soil, ensuring that there is sufficient contact area between the pressure plate, the flexible conductive layer and the ground soil, thereby effectively improving the power connection effect with the ground soil and having a smaller contact resistance with the ground soil, so as to have a good grounding conductive effect.

This invention provides a lightning protection device for medium-wave transmitters, belonging to the technical field of medium-wave transmitters. It includes a cabinet structure with a vertically mounted grounding mechanism on the bottom surface. A lightning rod is installed at the top of the support, serving as the first line of lightning protection. A complete intelligent grounding system is constructed, with humidity detectors evenly distributed at multiple depths in the soil layer to monitor humidity changes at different depths in real time. When a decrease in soil moisture and an increase in grounding resistance are detected, maintenance personnel can inject water into the water storage box through the water injection pipe. The water seeps evenly into the soil layer through the injection holes, effectively reducing the grounding resistance and ensuring excellent lightning protection grounding performance even in dry seasons or arid regions. Multiple grounding rods are arranged in parallel, increasing the contact area with the soil and further improving the discharge capacity. This design fundamentally solves the technical problems of traditional grounding devices being greatly affected by soil moisture and having unstable grounding effects.

The embodiment of the invention discloses a dry-type transformer system which comprises a dry-type transformer body and a dry-type transformer static side mechanism, a moving contact assembly is arranged on the dry-type transformer body, a static contact corresponding to the moving contact assembly is arranged on the dry-type transformer static side mechanism, and the moving contact assembly comprises a duckbilled moving contact, a moving contact frame and a conductive base. The duckbilled moving contact and the moving contact frame are correspondingly arranged on the conductive base, and the moving contact frame is provided with an elastic piece which applies pressure to the two sides of the duckbilled moving contact. According to the invention, the grounding resistance is reduced through the elastic piece with high-strength pressure, so that the power supply side and the load side of the dry-type transformer can be quickly switched off or switched on; in a large-current operation state, air cooling is started or stopped according to the temperature change detected by the contact temperature sensor, the insulation aging risk of the contact is eliminated, and then the power supply reliability and safety of the data center are improved.

The utility model provides a device for reducing grounding resistance of a lightning rod for geological drilling, and the device comprises a pedestal which is connected with the ground through a ground nail; the rotating ring is rotationally connected with the base; one end of the spray pipe is hinged to the rotating ring, a spray head is arranged on the outer side wall of the spray pipe, the spray head is communicated with the inner side of the spray pipe, and the spray pipe is communicated with the liquid outlet end of liquid supply equipment; and the driving assembly is used for driving the rotating ring to rotate. The beneficial effects of the utility model are that compared with the traditional manual spraying of sodium chloride solution, the sodium chloride solution is sprayed more uniformly through the rotating spray pipe, thereby ensuring the grounding effect of the lightning rod.

The utility model provides a kind of power collection line iron tower modularization grounding device, belong to electric power equipment technical field, the power collection line iron tower modularization grounding device includes: grounding body, connecting component, fixed module, conducting ring and adjusting mechanism;The grounding body is cylindrical structure, the top of grounding body is equipped with connecting face, connecting face is equipped with threaded hole, bolt is threadedly connected in threaded hole;The connecting component includes connecting plate, connecting rod and locking sleeve, connecting plate is fixedly arranged on the connecting face of grounding body, the middle part of connecting plate is equipped with through-hole, connecting rod is arranged in through-hole, the upper end of connecting rod is threadedly connected with locking sleeve;The fixed module includes fixed seat and clamping piece, the utility model can solve the technical problems that the existing power collection line iron tower grounding device structure is complex, installation and maintenance are difficult, modularization degree is low, and adaptability is poor.

The utility model discloses a tower lightning protection grounding device which comprises a connecting block, a grounding rod is fixedly installed on the outer surface of the lower end of the connecting block, a spiral metal conductor is fixedly installed on the outer wall of the grounding rod, a mounting hole is formed in the upper portion of the outer surface of one side of the connecting block, and a grounding down lead penetrates through the mounting hole. A limiting assembly is mounted in the connecting block and comprises a second limiting hole, a third limiting hole, a mounting cavity, a compression spring, a limiting block and a limiting pin. According to the lightning protection grounding device for the tower, the grounding downlead and the connecting block are limited through the limiting assembly, the stability after connection is improved, assembly and disassembly are facilitated, the contact area between the grounding body and soil is increased through the grounding rod, the spiral metal conductor and the spiral structure, and the grounding body is prevented from being damaged. And grounding resistance is reduced.

The present invention relates to a portable quick grounding device, comprising an electric hammer, a grounding rod and a lap cap, wherein the grounding rod comprises a grounding rod body and a grounding rod head and a grounding rod handle respectively arranged at two ends of the grounding rod body, wherein the grounding rod body is provided with a spiral texture, and in the grounding and withdrawal operation state, the grounding rod handle is arranged in the hammer head mounting hole of the electric hammer, and in the grounding state, the lap cap is installed on the grounding rod handle, and the lap cap is provided with a positioning mechanism for stabilizing the grounding rod handle and an auxiliary mechanism for withdrawing the grounding rod from the ground. Compared with the prior art, the present invention has the advantages of quick grounding, reusable components, and convenient carrying.

The utility model discloses a device for high -voltage electrical equipment insulation detection test relates to insulation detection device technical field, including the protection box, the cavity of protection box fixedly connected with U type support board between two ends, the top one end of U type support board is fixedly connected with signal receiver, the top other end of U type support board is fixedly connected with pulse generator, the cavity bottom one end of protection box is fixedly connected with power module. The protection box provided by the utility model is convenient for the detection operation of the detected device quickly on the basis of realizing shielding electromagnetic and preventing interference influence detection accuracy, thereby solve the problem that the detection accuracy of the existing high -voltage electrical equipment insulation detection test device is interfered because of lacking electromagnetic shielding protection structure, and because of the detection process is complicated, it is difficult to realize quick detection, influence power system operation efficiency.

The utility model relates to the technical field of electrical cabinets, in particular to a reinforced grounding device for an electrical cabinet, which comprises a base and a cabinet body arranged on the base, the base is in the shape of a rectangular frame, four corners of the base are provided with fixing blocks, the fixing blocks are provided with countersunk openings, each countersunk opening is internally provided with a grounding rod connected with the ground, and the side edge of the bottom of each grounding rod is provided with a chute. The four corners of the base are provided with fixing blocks, the four corners of the base are provided with inclined grooves, two opposite guide blocks are respectively arranged in the middle of two opposite horizontal side edges of the base, the guide blocks are provided with guide grooves which are overlapped with the center lines of the inclined grooves, and the guide blocks are provided with ground fixing rods which are inserted into the inclined grooves along the guide grooves. According to the utility model, the conductive function is realized, the whole base is effectively fixed, the stability of the cabinet body is ensured, the grounding area of the grounding rod is further increased through the design of the ground fixing rod and the chute, the grounding resistance is reduced, the conductive performance is improved, and the connection between the base and the ground is more stable through the design.

The invention discloses a conductive slip ring in a novel grounding mode, and relates to the technical field of conductive slip rings. The grounding ring mainly comprises a grounding ring piece, an insulating washer and a bearing seat. A boss is arranged between the inner ring and the outer ring of the end face of the grounding ring piece, the width of the boss is smaller than one third of the total width of the grounding ring piece, the boss is in positioning fit with a groove in the bearing seat, and the strength and the positioning precision of the boss are ensured. The width of the inner ring of the grounding ring sheet accounts for 1 / 3 to 1 / 2 of the total width, and an enough contact surface is provided to ensure effective conductive contact with the bearing seat. The insulating washer adopts an L-shaped step design, the outer diameter of the insulating washer is larger than that of the bearing seat, and the insulating washer covers the edge of the outer surface of the bearing seat, so that the outer ring of the grounding ring sheet is completely isolated from the bearing seat. According to the design, electroplating liquid is prevented from being in direct contact with the bearing seat in the electroplating process, the electroplating liquid is prevented from being attached to the surface of the bearing seat, and the quality of a grounding ring sheet coating is guaranteed.

The invention discloses a combined lightning protection device for a power distribution network line, and the device comprises an installation frame, a lightning rod is clamped on the installation frame, the bottom of the lightning rod is connected with a first grounding lead, the bottom end of the first grounding lead is connected with an intelligent surge protector, and the bottom end of the intelligent surge protector is connected with a second grounding lead. A coupler is arranged at the bottom end of the second grounding lead, a third grounding lead is connected to the bottom of the coupler, a grounding device is arranged at the bottom end of the third grounding lead, a driving mechanism used for driving the grounding device to act is arranged on the grounding device, and the outer wall of the lightning rod is sleeved with a protection mechanism. According to the combined lightning protection equipment for the power distribution network line, the installation frame ensures that the lightning rod is kept stable and is convenient to maintain or replace, the protection mechanism reduces physical damage for the lightning rod, the insulating layer prevents accidental electric shock, the grounding device facilitates improvement of grounding efficiency, reduction of grounding resistance and improvement of stability, and the driving mechanism simplifies the manual installation process. The method adapts to different soil conditions.

The invention discloses a wind turbine generator grounding system resistance reduction design method, which comprises the following steps: firstly determining a grounding resistance target value, then designing a wind turbine generator grounding system according to the target value, and the system comprises a fan main grounding grid, a resistance reduction grounding grid and a grounding wire connected with the resistance reduction grounding grid. During design, other surrounding grounding systems should be taken into consideration to form a large-scale grounding grid. In addition, a connecting ground wire of the main grounding grid and the resistance-reducing grounding grid needs to be buried and laid, the shape of the resistance-reducing grounding grid is designed according to the terrain, the landform and the soil structure, and the grounding resistance value is lower than that of the main grounding grid. In order to further reduce the grounding resistance, a mixture of a resistance reducing agent and conductive cement can be paved at the bottom of the horizontal grounding body. The grounding grid is preferably arranged in a place with small soil resistivity and large grounding grid area. The design method improves the stability and safety of the grounding system of the wind turbine generator.

The invention provides a construction method for a grounding resistance-reducing grounding grid of a wind turbine generator. The construction method mainly comprises the steps of digging a trench at a preset position, laying a resistance-reducing agent, connecting a vertical grounding electrode and a horizontal grounding body in a welding mode, manually digging a connecting wire trench, and enhancing the stability of a system by using a grounding module. By applying the method, the grounding resistance of the wind turbine generator can be effectively reduced, the stability of the wind turbine generator can be kept, and the operation safety of the wind turbine generator is greatly improved. Compared with a traditional construction method, the method has the advantages of being easy and convenient to construct, high in efficiency and the like, and is an ideal resistance-reducing grounding grid construction method in the field of wind power generation.

The utility model provides a grounding protection device of a high-voltage power distribution system, which belongs to the technical field of grounding protection and is provided with a grounding pile. The grounding pile is of a cylindrical structure, the grounding pile is arranged underground, the grounding pile is used for guiding leakage current into the ground, and the grounding pile comprises a conductive mechanism and a grounding mechanism; the conductive mechanism and the grounding mechanism are integrally arranged; the conductive mechanism is of a cylindrical solid structure; the grounding mechanism is of a concentric circle structure; the top end of the grounding mechanism is fixedly connected with the lower wall of the conductive mechanism; the height of the grounding mechanism is four times that of the conductive mechanism. Four groups of tripod structures are fixedly arranged at the lower end of the outermost concentric circle structure of the grounding mechanism; the problems that when electrical equipment or a circuit breaks down, the electric leakage phenomenon exists, and if the fault current is not processed in time, personal safety is threatened can be solved.