38 results about "Ground resistance" patented technology

The utility model discloses a pincerlike grounding resistance tester, and particularly relates to the technical field of pincerlike grounding resistance testers, the pincerlike grounding resistance tester comprises a resistance tester assembly, the bottom surface of a resistance tester body is provided with a lengthened pulling assembly, and the pincerlike grounding resistance tester only needs to manually pull out an adjusting holding rod, so that the pincerlike grounding resistance can be tested. And after the adjusting holding rod is drawn to a certain length, the adjusting screw rod is screwed back again to fix the adjusting holding rod at the current position, so that the overall length of the pincerlike grounding resistance tester can be conveniently adjusted, the working radius of the pincerlike grounding resistance tester can be increased by changing the overall length of the resistance tester, and meanwhile, the trigger can be pulled through the pull rope, so that the working efficiency is improved. The pull rope passes through the rope passing groove, and the rope passing groove can enable the pull rope to pull the trigger towards the inner side, so that an electric power worker can press the trigger to separate the clamp head, the electric power worker can conveniently use the clamp-shaped grounding resistance tester to test a narrow and deeper area of an electric box, and the practicability is higher.

The utility model discloses a wind turbine generator lightning protection grounding structure suitable for a rock geologic structure. The wind turbine generator lightning protection grounding structure comprises a vertical grounding electrode communicated with a fan foundation. Grounding drill holes with the number corresponding to that of the vertical grounding electrodes are evenly formed in the periphery of the fan foundation in the circumferential direction, the grounding drill holes penetrate through the high-resistance rock stratum and communicate with the low-resistance rock stratum to form a high-resistance rock stratum section and a low-resistance rock stratum section, rock stratum cracks are formed in the wall face of the high-resistance rock stratum section, and the vertical grounding electrodes are inserted into the grounding drill holes. The bottom end of the vertical grounding electrode penetrates through the grounding drill hole to be inserted into the low-resistance stratum, and graphene transition bodies are filled between the vertical grounding electrode and the high-resistance stratum section of the grounding drill hole and in stratum fractures of the high-resistance stratum section at high pressure. According to the utility model, the resistance value of the grounding resistor of the wind turbine generator in rock geology can be effectively reduced, so that the grounding requirement of the wind turbine generator can be better met, the normal operation of wind turbine generator equipment and the personal safety of personnel can be ensured, and the construction work amount and the material cost can be effectively reduced.

The invention discloses an electromagnetic shielding film and a circuit board, the electromagnetic shielding film comprises a shielding layer, a first surface of the shielding layer is provided with a projection structure, and after the electromagnetic shielding film is laminated with a circuit board substrate provided with an OSP grounding structure through the projection structure, under a preset grounding window size, the grounding resistance of the electromagnetic shielding film is less than 800m omega. The electromagnetic shielding film can be ensured to maintain proper grounding resistance on the OSP grounding structures of different circuit board substrates, so that the grounding effect of the electromagnetic shielding film on the OSP grounding structures of the circuit board substrates is relatively good, and the electromagnetic shielding requirement of the circuit board can be met.

The utility model provides a floating prevention device for a ground source heat pump buried pipe, which belongs to the field of ground source heat pumps and comprises a floating prevention plate and four supporting and adjusting mechanisms used for positioning the floating prevention plate and capable of horizontally adjusting the floating prevention plate, and each supporting and adjusting mechanism comprises a screw capable of penetrating through the floating prevention plate. A supporting disc abutting against the ground is fixed to the bottom of the threaded rod, a fixing cone capable of being inserted into the ground is fixed to the bottom of the supporting disc, the threaded rod is in threaded connection with a supporting nut and a positioning nut, and the floating resisting plate can be adjusted to the horizontal position by adjusting the supporting nut and the positioning nut. According to display of the bubble level, the supporting nut and the positioning nut are accurately adjusted, it is ensured that the floating resisting plate reaches the absolute horizontal state, and therefore it is ensured that the upper end of a pipe opening of the buried pipe is in the horizontal state, good conditions are provided for follow-up pipeline threaded connection, and the problem that due to unsmooth thread meshing, pipeline installation is inconvenient is solved.

The invention discloses a tower horizontal grounding electrode impact effective length calculation method, and the method comprises the steps: building a three-dimensional horizontal grounding electrode model according to the structure size, material attribute and burying condition of a horizontal grounding electrode of a 220kV power transmission line tower; arranging a lightning current excitation source at one end of a grounding electrode of the three-dimensional horizontal grounding electrode model, and simulating lightning impulses with different amplitudes, waveforms and action time; carrying out electromagnetic field simulation calculation, outputting a voltage peak value, a grounding current peak value and current distribution of the grounding electrode, and calculating the impact effective length of the horizontal grounding electrode according to the impact grounding resistance and the geometric parameters of the grounding electrode; adjusting the size and the structure of the grounding electrode to obtain the effective impact length of the horizontal grounding electrode under different conditions so as to optimize the three-dimensional horizontal grounding electrode model; and performing simulation verification on the optimized three-dimensional horizontal grounding electrode model, and if the impact grounding resistance does not meet the standard value, continuing to adjust and optimize and repeating the simulation verification process until the impact grounding resistance meets the standard requirement.

The utility model provides a quick insulation test plug handle of a logging instrument, which is characterized by comprising a handle body, one side of the handle body is in threaded connection with a 41-core aviation socket through a three-combination screw, the other side of the handle body is sequentially sleeved with a 32-core plug and a handle outer cylinder, and the handle outer cylinder is connected with a guide block through a cross countersunk head screw; the device is applied to detection and maintenance of the logging instrument, not only can realize quick connection test of the logging instrument and diagnostic equipment, but also can ensure that the shell of the logging instrument is communicated with the ground wire of the diagnostic equipment, judges whether the cable cores are damaged by measuring the ground resistance of each cable core, and can assist testers in quickly locking the fault position of the instrument.

The invention relates to an earth screen resistance measuring method, device and equipment, a storage medium and a program product. The method comprises the following steps: generating an initial square wave signal with a preset frequency; filtering and amplifying the initial square wave signal to obtain an excitation electric signal; inputting the excitation electric signal to a voltage generator, so that the voltage generator generates a current signal in the to-be-tested ground grid loop based on the excitation electric signal; obtaining sensing information obtained by sensing the current signal by the induction coil; wherein the induction coil is arranged in a monitoring loop connected with a to-be-detected earth screen; and according to the sensing information and the electric signal information of the excitation electric signal, determining the resistance information of the to-be-tested ground grid. By adopting the method, the resistance of the ground grid can be accurately measured.

The invention provides a fixing device for a street lamp grounding resistance test, which comprises a box body, a placement plate slidably arranged in the box body, a tester placed at the top of the placement plate, a fixing assembly arranged in the placement plate and used for quickly limiting the tester, and a box door rotatably arranged on one side of the box body. A fixing belt is fixedly arranged on one side of the top of the containing plate, a positioning seat is fixedly connected to the other side of the top of the containing plate, the fixing belt is inserted into the positioning seat and fixed through bolts, moving wheels are arranged at the four corners of the bottom of the box body, a lock body is arranged on one side of the box door, and sliding grooves used in cooperation with the containing plate are formed in the two sides of the inner wall of the box body. The top of the box body is fixedly connected with a push rod, and the fixing assembly comprises moving blocks fixedly arranged on the two sides of the bottom of the tester. The fixing device for the street lamp grounding resistance test has the advantages that the tester can be conveniently mounted and dismounted, and meanwhile, the stability of the tester is improved.

The invention discloses a grounding wire state active monitoring device and method suitable for a global distribution network. The device comprises a monitoring module, a control module and a communication transmission module. The monitoring module collects geomorphic characteristics, wind speed, clamping pressure and grounding resistance parameters of a grounding point through a camera and a multi-type sensor. The control module fuses multi-source information based on the improved D-S evidence theory, achieves the safety state evaluation of the grounding wire, and optimizes a communication path through an impedance matching algorithm. And the communication transmission module adopts a LoRa adaptive frequency hopping technology to dynamically adjust radio frequency parameters, so that the reliability of data transmission in a complex environment is ensured. According to the method, the reverse power transmission risk of the distributed power supply can be effectively dealt with, global real-time monitoring, intelligent evaluation and risk early warning of the grounding wire state are realized, and the safety and management efficiency of distribution network maintenance operation are remarkably improved.

The invention relates to the technical field of ocean engineering, and particularly discloses an intelligent pile gripper perpendicularity control system and method based on a fiber bragg grating sensing grid. The fiber bragg grating sensing grid composed of circumferential and axial sensors is arranged on a jaw structure of a pile gripper; the intelligent decision-making control module integrates data fusion and a robust control algorithm, can execute axial stress asymmetric ultra-early warning and bending moment calculation based on sensor data, and generates a control instruction according to the axial stress asymmetric ultra-early warning and bending moment calculation. A triple cooperative control strategy is adopted, specifically, foundation resistance is balanced by adjusting parameters of a pile hammer; when inclination occurs, the pile gripper is driven to conduct rapid correction; according to the large-diameter pile driving perpendicularity control method, crossing from passive deviation correction to active deviation prevention and root correction is achieved, the problems that adjustment is blind and precision is insufficient in a traditional method are solved, and the control precision, efficiency and reliability of the large-diameter pile driving perpendicularity are remarkably improved.

The utility model relates to a movable gate machine, including gate machine main part, support table, a plurality of elevating mechanism, a plurality of sensor, wheel subassembly, gate machine main part sets up on the support table, elevating mechanism includes elevating drive piece, support plate, elevating drive piece is used for driving the support table along the vertical direction to move, elevating drive piece includes drive body and drive shaft, the drive body is equipped with the support plate. The driving body is connected with the supporting table, the driving shaft extends in the vertical direction, and a supporting plate is arranged at the lower end of the driving shaft and used for abutting against the ground; the sensors are in one-to-one correspondence with the lifting driving pieces and connected with the supporting plate, and the sensing ends of the sensors are used for sensing the ground; the wheel assembly is arranged on the lower side of the supporting table and comprises a plurality of moving wheels. According to the movable gate machine provided by the utility model, the lifting mechanism, the sensor and the wheel assembly are arranged, so that personnel can move the gate machine without other equipment, and the operation is convenient and rapid; the device is suitable for various outdoor and indoor road surfaces and slopes, and smooth movement is guaranteed.

The utility model discloses a lightning protection junction box of a sensor, which relates to the technical field of junction boxes, and comprises a box body, the front end of the box body is movably connected with a box cover, the inner side of the box body is fixedly connected with an insulating shell, a conductive frame is fixedly connected between the box body and the insulating shell, and the inner side of the insulating shell is fixedly connected with a wiring terminal strip. According to the utility model, the conductive frame grounding structure forms a low-impedance thunder and lightning discharge loop, the grounding resistance is low, the thunder and lightning response speed is fast, the thunder and lightning energy can be rapidly guided into the ground, the sensor is effectively protected from being damaged by the thunder and lightning, and the reliability of the sensor is improved. The fault rate of the sensor caused by lightning stroke is greatly reduced, the clamping plate and the adjusting ring form an adjustable fixing assembly, self-adaptive adjustment can be carried out according to the diameter of a cable, rapid locking and unlocking of the box cover can be achieved through knob operation, other tools are not needed, and the mounting and dismounting efficiency is improved.

The utility model relates to the field of ground resistance detection, and discloses a ground resistance detection alarm device based on a quantitative loading tank truck, which comprises a support frame, the front side of the support frame is fixedly connected with a mounting seat, the front side of the mounting seat is connected with a mounting block through a plug-in assembly, and the front side of the mounting block is fixedly connected with a detection alarm body. A limiting ring is rotatably connected to the top side of the mounting seat, a limiting assembly is arranged at one end of the limiting ring and used for mounting the detection alarm body, winding rollers are rotatably connected to the two sides of the supporting frame, a fixing block is fixedly connected to the outer wall of the supporting frame, and a sliding rod is slidably connected to the outer wall of the fixing block. According to the utility model, the detection alarm body can be quickly disassembled through simple stirring and rotating operations, so that the maintenance efficiency is improved, and the maintenance cost is reduced; by means of spring resetting and clamping structures, orderly winding of wires is achieved, disorder is avoided, safe operation of equipment is ensured, the service life of the wires is prolonged, and meanwhile the cleanliness of the equipment is improved.

The utility model relates to gas pipeline technical field discloses a kind of connecting piece for roofing gas pipeline lightning protection and static electricity prevention, including connecting steel pipe and gas pipeline, the side surface welding of connecting steel pipe has flat steel, the top sliding connection of flat steel has disconnecting card, the inside fixed connection of disconnecting card has installation shell, the inside installation of installation shell has positioning assembly, the end fixed connection of connecting steel pipe has connecting shell, the inside installation of connecting shell has docking assembly, the end of gas pipeline is arranged in the inside of docking assembly;The positioning assembly includes fixed link, and the inside fixed connection of fixed link is in installation shell. In the utility model, moving plate drives block one and inserts flat steel slot, quickly connects disconnecting card, it is convenient for grounding resistance detection, connecting steel pipe and gas pipeline can be installed synchronously after docking, avoid later construction to destroy pipeline and anticorrosive layer, reduce construction difficulty, improve work efficiency.

The invention relates to the technical field of lightning protection grounding, in particular to a manufacturing technology of a lightning protection grounding device of a novel electric contact material, and discloses a grounding device of a flexible graphite lightning protection grounding body. The lightning protection device further comprises a positioning sleeve frame used for positioning and guiding, a lightning protection frame part used for lightning receiving and power transmission, a grounding insertion pile used for grounding and current diffusion, and an auxiliary pile pressing part used for assisting installation of the grounding insertion pile, and a flexible graphite lightning protection connection wire is adopted as a core conduction component, and a graphite column is adopted as a core grounding component. The problems of grounding resistance increase and function failure caused by corrosion of a traditional metal grounding electrode are avoided, and frequent maintenance and replacement are not needed. The flexible graphite lightning protection connecting wire is good in flexibility, not prone to breakage, capable of meeting wiring requirements of different installation scenes, convenient and fast to install, capable of saving labor and accurate in positioning, labor-saving pressing-in of the grounding inserting pile is achieved through structures such as a pedal frame and a pull-down chuck piece of the auxiliary pile pressing part, manual hammering or large machines are not needed, and operation is convenient and fast.

The utility model provides an anti-corrosion ultrahigh-voltage transformer substation grounding device, which belongs to the technical field of grounding devices and comprises a grounding body and a grounding wire, one end of the grounding wire is connected with the grounding body, the other end of the grounding wire is connected with equipment, an anti-corrosion outer layer is arranged on the grounding wire and is of a three-layer structure, namely an inner layer, a middle layer and an outer layer, the inner layer, the middle layer and the outer layer wrap the grounding wire, and a drainage structure is arranged on the grounding body and comprises a drainage pipeline and a filter layer. The anti-corrosion outer layer with a three-layer structure is arranged on the grounding wire and comprises the inner layer of the epoxy resin layer, the middle layer of the polyurethane layer and the outer layer of the polytetrafluoroethylene layer, so that the grounding device can resist erosion of various corrosion factors, and the service life of the grounding device is prolonged. The corrosion resistance of the device is improved, and after the device is operated in a long-term complex environment, a user can judge the corrosion degree and the protection effect of the grounding device by observing the change condition of the grounding resistance.

This invention discloses an automated continuous deployment device and method for high-density electrical resistivity tomography (EPT) electrodes. The device includes a vehicle body and mounted environmental perception, navigation and positioning, automatic movement, electrode feeding and clamping, impact drive and resistance sensing, and a total control system. This invention achieves autonomous obstacle avoidance and target point suitability assessment in complex terrain through the coordinated operation of the perception and navigation systems. During the deployment phase, the impact drive and resistance sensing system acquires the average penetration energy and instantaneous impact stiffness during electrode penetration in real time, and performs dual-parameter physical calculations based on the cumulative penetration depth. The system then determines the ground resistance state, enabling adaptive closed-loop deployment and retrieval of electrodes under various conditions, including normal low-energy operation, hard soil pressure enhancement, and obstacle avoidance. This invention effectively replaces manual labor, improving the automation level and operational efficiency of electrode deployment.

The utility model relates to a nuclear power coaxial cable, which comprises a central conductor, an insulating layer, a grounding layer and an outer coating layer which are sequentially arranged from inside to outside, the central conductor is bare copper, and the usage amount of the central conductor is 45 kg / km to 55 kg / km; the insulating layer is made of crosslinked polyethylene, and the thickness of the insulating layer is 2 mm to 2.5 mm; the grounding layer is formed by weaving a plurality of strands of conductive wires, each strand of conductive wire comprises a plurality of bare copper wires, the diameter of a single bare copper wire is 0.15 mm-0. 17 mm, the weaving pitch of the grounding layer is 63 mm-67 mmm, the shielding rate of the grounding layer is 92%-98%, and the direct current resistance of the grounding layer is 1.4 ohm / km-1. 65 ohm / k. According to the nuclear power coaxial cable, the grounding resistance can be reduced under the condition that the diameter of the center conductor is small, and the electrical safety of the nuclear power coaxial cable is improved.

The invention discloses a hoisting method for equipment parts, and particularly relates to the technical field of hoisting, which comprises the following steps of: 1, compiling a hoisting scheme and a risk control list according to weight, gravity center, shape, height and environmental risk; 2, checking the equipment, and confirming the weight, the gravity center position, the lifting point strength, the transportation state and whether the detachable part needs to be unloaded or not; 3, checking the tool, checking a crane, a gantry crane, a steel wire rope, a shackle, a lifting belt, a balance beam, a clamping ring, a rotary lifting ring, an anti-falling rope clamp, a guide rope, a limiting stopper and a torque wrench, checking a certification, a point inspection record and a scrapping criterion, and confirming that the tool can be normally used and work; 4, the environment is confirmed, and the soil endurance, the supporting leg sole timber, the wind speed, the illumination, the obstacles and the electrical safety distance are confirmed. The hoisting safety is extremely high, the probability of danger in the equipment part hoisting process can be remarkably reduced, and the practical application effect is good.

A device for preventing electric shock and fire according to the present invention includes one or more fault detectors having one end electrically connected to at least one of two or more earth-isolated power lines with a resistance value greater than or equal to a predetermined earth resistance value and a first neutral point having a potential between the voltages of the two or more power lines, and the other end electrically connected to earth, wherein the fault detector detects a leakage current by forming a current path for the leakage current flowing from the two or more power lines or the first neutral point to earth.Therefore, according to the present invention, by detecting a leakage current between a power line, which is insulated from the earth and supplies power, and the earth, limiting the detected leakage current, which is a dangerous or lesser current, or cutting off the flow of leakage current in a human body or peripheral installations, it is possible to prevent electric shock and the occurrence of fire during the leakage current.

The invention relates to a phase selection and positioning method for a single-phase earth fault of a stator winding of a pumped storage generator motor, and belongs to the technical field of generator fault detection. On the premise of considering asymmetry of three-phase ground capacitance and ground conductance of a stator winding of the generator motor, real-time measurement of the three-phase asymmetric ground parameters is realized by measuring the fundamental wave and third harmonic component of the neutral point voltage. And then, a grounding fault phase judgment and grounding resistance calculation method is provided, and reliable positioning accurate to the stator slot position is realized by constructing a stator winding single-phase grounding fault position evaluation equation. And finally, the property of the ground fault is judged by measuring the size of the ground resistance for the second time, and the instantaneous ground fault and the permanent ground fault can be accurately distinguished. The method is simple, reliable, high in safety and easy to implement.

The invention provides insulation detection equipment and an insulation detection method, and the equipment comprises a balance bridge arm, a switching bridge arm, a bus insulation detection unit, and a calculation unit. The calculation unit calculates the positive ground insulation resistance value and the negative ground insulation resistance value of the battery pack based on the bus positive ground voltage value, the bus negative ground voltage value, the balance bridge arm resistance value related to the balance bridge arm and the switching bridge arm resistance value related to the switching bridge arm. And determining the battery position number of the grounded single battery in the battery pack based on the bus positive voltage to ground value, the bus negative voltage to ground value, the battery positive insulation to ground resistance value, the battery negative insulation to ground resistance value, the balance bridge arm resistance value and the number of the single batteries in the battery pack. The battery position number of the grounding single battery is calculated through the calculation unit, and other devices are not needed, so that the detection complexity can be reduced, and the detection convenience is improved.

The invention provides an LC resonant circuit for improving spurious suppression of a phase-locked source, and belongs to the technical field of airborne radio frequency, the circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, a diode N1 and an inductor L1, the capacitor C1, the capacitor C2 and the inductor L1 are connected in parallel to form a resonant sub-circuit, the capacitor C3 and the capacitor C4 are connected to two ends of the resonant sub-circuit and are respectively grounded in parallel, and the resistor R1, the diode N1 and the inductor L1 are grounded in parallel. The resistor R1 and the capacitor C3 are connected in series with the harmonic oscillator circuit, and the diode N1 is connected in parallel to the ground between the capacitor C2 and the capacitor C3. According to the circuit, the notch depth of the LC resonance circuit is increased, phase discrimination leakage is optimized, and signal spurious suppression is improved; the phase-locked loop circuit is suitable for most phase-locked loop circuits, wide in application scene, high in universality, simple in structure and obvious in signal spurious suppression effect.

The present disclosure provides a track performance test device and a test system. The track performance test device comprises: a power input device configured to be connected with one of the track drives to apply a first load for simulating driving force for making the track travel; a bearing device comprising two bearing parts arranged side by side, each bearing part is configured to support one track, and at least one bearing part comprises a load simulation device configured to apply a second load for simulating ground resistance to the track; and a detection device configured to obtain performance data of the tracked chassis, the performance data comprising temperature data and / or wear data of the track. The track performance test system comprises: a housing space; a track performance test device; and a temperature adjusting device. The present disclosure can obtain more accurate test data of track performance.

The application relates to the technical field of electric vehicles, and particularly discloses an insulation detection circuit for a charging pile, which comprises a power supply, an MCU, a triode Q1, an operational amplifier U1, a resistor R1 and a resistor R2; the emitter and the base of the triode Q1 are short-circuited; the emitter of the triode Q1 is further connected with a measured object and the positive input end of the operational amplifier U1; the collector of the triode Q1 is grounded; one end of the resistor R1 is grounded, the other end of the resistor R1 is connected with one end of the resistor R2, and the other end of the resistor R2 is connected with the output end of the operational amplifier U1; the negative input end of the operational amplifier U1 is further connected with the other end of the resistor R1; the output end of the operational amplifier U1 is further connected with the first sampling port of the MCU; the power supply is connected with the measured object, and the voltage range of the power supply is 9-12V. The technical scheme of the application makes the insulation detection of the charging pile free from electric shock risk and meets the precision requirement.

The utility model relates to the technical field of electromechanical engineering safety detection, and discloses a safety detection device for electromechanical engineering. The safety detection device for electromechanical engineering comprises a detection table, a motor, a connecting rod, a first connecting plate, a rubber sleeve and an insulation resistance tester, the motor is installed on the upper portion of the detection table, an output shaft of the motor is connected with the connecting rod through a coupler, the first connecting plate is fixedly connected to the front side of the connecting rod, and the first connecting plate is fixedly connected with the rubber sleeve. Rubber sleeves are symmetrically arranged on the front side of the first connecting plate, and an insulation resistance tester is installed on the front side of the first connecting plate. The connecting rod is driven by the motor to rotate, and then the positions of the first connecting plate and the second connecting plate are changed, so that an insulation resistance test mode or a grounding resistance test mode is switched, detection equipment does not need to be replaced, and efficient detection is achieved.

The utility model relates to the technical field of electric power grounding, in particular to a slow-release resistance-reducing grounding device, which comprises a main body, a resistance-reducing agent is contained in the main body, the lower end of the main body is inserted into the ground, the main body reduces the resistivity of soil through the resistance-reducing agent, and a plurality of main bodies are connected through grounding wires; the main body comprises shells, the shells are connected through grounding wires, the lower ends of the shells are inserted into the ground, a liquid storage bottle is installed at the top end of each shell, a vent hole is formed in one side of the top end of each liquid storage bottle, a cavity is formed in each shell, a plurality of rows of drill holes are formed in the outer side of each shell, a permeable membrane is installed between each drill hole and the corresponding shell, and the permeable membranes are communicated with the liquid storage bottles. The liquid storage bottle and the cavity are filled with a resistance reducing agent, the resistance reducing agent permeates through the permeable membrane, and the resistance reducing agent is transmitted to the soil through the drill hole. According to the slow-release resistance-reducing grounding device provided by the utility model, the grounding device is simple in structure, the grounding resistance is reduced, the construction process is simplified, the cost is saved, and consumables are less.

The utility model relates to a kind of buried device for reducing grounding resistance, including conducting rod, the conducting rod is hollow structure, the inside cavity of the conducting rod is filled with liquid, water seepage hole is set up on the lateral wall of the conducting rod, the top end of the conducting rod is set up water injection hole.The purpose is to provide a kind of buried device for reducing grounding resistance, to solve the problem that ordinary conducting rod in the prior art relies on the natural conductivity of soil, in arid or high resistivity area, it is easy to cause the problem of resistance increase due to soil water loss.