8results about How to "Reduce ground resistance" patented technology

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 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 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.

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 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 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.