76results about How to "Eliminate the risk of electric shock" patented technology

An artificial pond having a motor pump unit with a brushless permanent magnet synchronous alternating current motor that is wound for operation on an alternating current voltage not greater than fifteen volts, and a step down transformer that converts 120 volts AC to an AC voltage not greater than 15 volts.

The invention relates to an intelligent safety rail arranged at the periphery of a high-voltage test device, and belongs to the technical field of safety protection. The rail is composed of a plurality of stand columns, the stand columns are provided with infrared bijection sensors and ultrasonic wave sensors towards the outer side of the rail, the transmitting ends and the receiving ends of the infrared bijection sensors are located on two adjacent stand columns respectively and are aligned to form loops, the receiving ends are connected with a wireless signal transmitting circuit and connected with a switch of the high-voltage test device in the rail through wireless signals, and output ports at the receiving ends of the ultrasonic wave sensors are connected with an alarm apparatus. By means of the intelligent safety rail used in a high-voltage test, when a worker gets close to a high-voltage test area, an alarming signal can be given out; when the worker breaks through an infrared bijection light path, a low-voltage power source is rapidly cut off through the switch, power supply to the device in the high-voltage test area is stopped, it is guaranteed that the device in the high-voltage test area is changed from the electrification state to the non-electrification state, and electric shock hazards are accordingly eliminated.

The invention discloses a divided air conditioner water heater. The outlet of the compressor in the invention is connected to the valve aperture 2c of the four-way change valve, the heat exchanger is connected with restriction part, water box of electromagnetic valve and one or several room machines after connected with the valve aperture 2a of the four-way change valve, then it is connected with the valve aperture 2b of the four-way change valve, finally it is returned to the inlet of the compressor through the valve aperture 2d. The invention is the indoor machine and the water box use the same outdoor machine, it can realize functions of air conditioner and heat pump water heater, and it solves the problem of frost eliminating of the heat pump heater.

A health monitoring method comprises the steps of acquiring human body electrocardio data with a conductive fabric serving as an electrocardio electrode; acquiring human body pulse data through a blood oxygen probe; transmitting the electrocardio data and the pulse data wirelessly to a monitoring device which performs calculation according to the received electrocardio data and pulse data through a multi-scale entropy algorithm respectively to obtain two groups of result data; drawing a graph with the result data serving as a vertical coordinate and obtained scale factors of the result data serving as a horizontal ordinate, and performing evaluation analysis according to values and trends of curves of the drawn graph; transmitting evaluation analysis information to a client and displaying the evaluation analysis information; and emitting alarm when the evaluation analysis information meets preset conditions. The invention further provides a corresponding health monitoring device. According to the method and the device, the overall level of human body health can be analyzed after processing through the multi-scale entropy algorithm.

The invention provides an automobile air conditioner electric quantity detection and distribution control method, a computer readable storage medium and an automobile air conditioner. The input voltage and the input current of the battery are detected in real time. The voltage change rate and the current change rate are calculated, the battery electric quantity state is judged according to the input voltage, and the compressor power and the outer fan rotating speed are intelligently adjusted in real time according to the voltage change rate and the current change rate under different battery electric quantity states. The electric quantity state of the battery is judged through battery operation parameter detection, the electric quantity state of the battery can be accurately judged throughnewly-added judgment logic, the electric quantity is intelligently distributed according to different states, intelligent distribution of the electric quantity is achieved, and therefore the purposesof prolonging the endurance time of an air conditioner and prolonging the service life of a vehicle-mounted storage battery are achieved.

The invention is a safety electrical connector, including connection head and connection seat, where there is a circular grounding end and a grounding column arranged in the connection seat, there are electric contact pieces arranged on the connection head, there is an isolating ring arranged between each pair of electric contact points in the connection head, a spacer is arranged in the isolating ring; the displacement of the isolating ring is under the control of that of the spacer and that of the spacer is controlled by that of the grounding column. The invention has a fully sealed structure, each pair of electric contact points is sealed and isolated before reaching the position as inserted, the spacer is controlled by the grounding stick and adopts an interlinked locked structure and simultaneously in structure, it assures only when the grounding wire is contacted can other contact points be closed, thus radically, avoiding hidden trouble of creepage of other components of electric appliance. In addition, it also designs two draining direct current channels to prevent accident hidden trouble of overturn and leakage.

The invention discloses a two-way on-board charger insulation detection circuit and a detection method thereof. The detection circuit comprises an inverter circuit, a first Y capacitor (C1) connectedbetween an output firing line and a ground line of the inverter circuit, a second Y capacitor (C2) connected between an output zero line and the ground line of the inverter circuit, and further includes a firing line sampling circuit and a zero line sampling circuit correspondingly connected with the output firing line and the output zero line of the inverter circuit, and a controller connected with the firing line sampling circuit and the zero line sampling circuit. The firing line sampling circuit and the zero line sampling circuit respectively output sampling voltage. The controller determines a two-way on-board charger insulation state according to the two sampling voltage. When an on-board charger works in an inverter mode, values of ground insulation impedance of the output firing line L and the output zero line N are detected, and whether insulation failure exists between AC output of a pure inverter mode and a vehicle body is determined, so as to eliminate electric shock hazardof personnel. The circuit has advantages of simple and practical structure, easy implementation and low cost.

The invention discloses a water-storage water heater with electricity-protection wall technique, which comprises a shell, an inner frame, an insulating inlet water pipe and an insulating outlet water pipe. The shell is provided thereon with a water inlet and a water outlet. The insulating inlet / outlet water pipes are provided inside with an insulating mechanism which allows the length of inlet / outlet water paths inside the pipes to be larger than the actual length of the insulating inlet / outlet water pipes, a screw-like spiral bar in a spiral conveyor is arranged inside each of the insulating inlet water pipe and the insulating outlet water pipe, so as to form a spiral through water path inside the pipe, or a twisted bar twisted from a plastic sheet is used to replace the screw-like spiral bar. The insulation mechanism tallies with the inner holes of the pipes in shape, the water paths inside the pips twist and circulate along the twisted plane of the insulation mechanism and is fixed inside the insulating inlet / outlet water pipes via screws, and the insulating inlet / outlet water pipes, the inner frame and the shell are fixed each other via improved screws. The invention has the advantages of no need of being installed by a user, good hidden effect, no increase in occupied space, and good electricity-protection effect; and solves the problems of inconvenient use and potential electric shock caused by the improper installation when the user installs the water heater by himself.

The invention relates to the field of detection machinery, in particular to an online type bulb lamp illuminating and dimming testing machine. The online type bulb lamp illuminating and dimming testing machine comprises a rack, a conveying device, a test device, a locating device and a sorting and conveying belt, and is characterized in that the conveying device comprises a synchronous belt; a plurality of lamp holders are arranged on the synchronous belt in an equal spacing manner; two conductive contacts are arranged on each lamp holder; the synchronous belt is arranged on a driving synchronous wheel device and a driven synchronous wheel device in a sleeving manner, and is driven by the driving synchronous wheel device to move step by step; the test device comprises a first bracket; a drive mechanism is arranged on the first bracket and drives a movable plate connected with the drive mechanism to drive elastic contacts to be in contact with the lamp holders; the elastic contacts areconnected with wires for electrification. According to the online type bulb lamp illuminating and dimming testing machine disclosed by the invention, automatic detection machinery replaces a manual method, so that the detection efficiency and the correction rate in an LED lamp production process are effectively improved, and the labor cost is greatly reduced.

The invention discloses an instant-heating anti-electrical wall water heater, which comprises an outer bottom casing, a water inlet and outlet insulating tube which is installed on the outer bottom casing, a heating cap, a control circuit, and a thermoregulator, a water-flow regulating valve and a pressure switch which are arranged on the water inlet insulating tube. The invention is characterized in that the thermoregulator comprises an auto-reset thermoregulator which can keep outlet water in constant temperature and is controlled by water temperature, and a manual reset thermoregulator which is manually controlled to monitor the water heater. An insulating mechanism which leads the length of the inlet and outlet watercourse in the tube longer than the actual length of the water inlet and outlet insulating tube is arranged in the water inlet and outlet insulating tube, a spiral rod which takes screw bolt shape in a screw conveyer is arranged in the water inlet and outlet insulating tube, which leads the watercourse to form a spiral connecting watercourse in the tube, or a rotative surface twist strip which is twisted and coiled by a twist plate of a plastic flake is arranged in the water inlet and outlet insulating tube. The invention has simple structure, good hidden effect, simple and convenient employment, which cannot increase manufacture cost and service space, and inconvenience and electroshock hidden danger which is caused by improper installation can be eliminated when the water heater is installed by the user.

The invention discloses a safety socket with an elastic protective cover plate. An opening is arranged in a socket box, and a socket plate is arranged on the opening in a covering mode; a through hole is arranged in the socket plate, one end of a rotating shaft is fixedly arranged on the bottom wall of the socket box and the other end passes through the through hole to be connected with a rotating sheet; three-hole socket holes are arranged on and sleeve the rotating sheet, and the rotating sheet can rotate by itself; a rotating cover is arranged on the rotating sheet in a covering mode and is provided with three strip-shaped holes matched with the three-hole socket holes, and the rotating cover and the rotating sheet can rotate coaxially to enable the three-hole socket holes to be exposed or shielded; a protective cover plate is arranged on the socket plate, one end is hinged with one side edge of the socket plate and the other end is provided with grab buckles; a notch is arranged in the direction from the grab buckle to the hinged place, and the size of the notch is smaller than the cross section of a plug but larger than the cross section of a wire connected onto the plug; the protective cover plate is fixedly arranged on the socket plate in a covering mode, and the wire extends out from the notch; and the protective cover plate and the socket plate are connected via two extension springs. The safety socket with the elastic protective cover plate has the advantages that the structure is simple; the use is convenient; an electric shock accident caused when a kid plugs or pulls the plug randomly can be avoided; and the use safety is high.

The invention discloses an LED fluorescent lamp, which comprises a lamp tube and a first end cover and a second end cover installed at both ends of the lamp tube, the first end cover is a conductive end, and a second end cover is arranged on the first end cover A power socket, the first power socket is electrically connected to the LED in the lamp tube, and also includes a first power connector, the first power connector includes a first plug matching the first power socket, The first plug is inserted into the first power socket and electrically connected with the first power socket. The plug of the conductive end of the lamp tube of the present invention is directly inserted into the power socket, which eliminates the hidden danger of electric shock. The hidden danger of electric shock in the process, the invention also has the advantages of simple structure, convenient installation and the like.

The invention discloses a detection device, a detection system and a detection method. The detection device is suitable for detecting dedicated transformer acquisition terminals or concentrators, and comprises a control chip, a control circuit, a power supply circuit, a communication circuit, a detection probe interface and a result indicating device, wherein the detection probe interface is used for being connected with a hardware port of a product to be detected; the power supply circuit is respectively connected with the detection probe interface and the control chip; the control chip is connected with the detection probe interface through the communication circuit and the control circuit, and is used for automatically detecting the hardware port of the product to be detected; and the result indicating device is connected with the control chip for displaying detection results. The detection device, the detection system and the detection method can avoid situations such as wiring error and misjudgment of test states caused by manual wiring easily, eliminate hidden danger of electric shock, can achieve automatic detection on the hardware port of the product to be detected, display the detection results through the result indicating device, reduce manual operation of the staff, increase detection efficiency, and are suitable for batch production and management.

A motor drive apparatus includes a converter configured to convert AC power from an AC power supply into DC power and then output the DC power to a DC link, a capacitor provided in the DC link, an inverter configured to convert DC power in the DC link into AC power for motor drive, a discharge circuit which is provided in parallel with the capacitor in the DC link, and is selectively switched between a discharge operation of discharging DC power in the DC link by electrically connecting the discharge circuit and the capacitor to each other, and a non-discharge operation of cutting electric connection between the discharge circuit and the capacitor, and a discharge circuit drive unit configured to perform switch drive of the discharge operation and the non-discharge operation of the discharge circuit by using DC power of the DC link as drive power for the switch drive.

The invention provides a novel device combining an air source heat pump system and a barrel bath device. By using the bottom space of the wood bath barrel, a double-layer structure is arranged at the bottom part of the wood barrel, wherein, a double bottom interlayer is separately divided into a left bin (2) and a right bin (3) which are connected with each other by a U-shaped pipe. The left bin is provided with a water inlet (5) at the bottom part; a mineral and water filtering device is arranged inside the bin to ensure domestic water to meet the efficacy of thermal water. The right bin is internally provided with a metal thermal insulation bearing water tank (10); a condenser (12) is arranged inside the water tank and connected with an air source heat pump mainframe (21) to produce hot water; the right bin is provided with an water outlet (17) connected with the water using end such as a shower, and the like, by a tee joint regulator. An uplift side jacket top cover (22) is arranged at the top end of the wood barrel. The invention provides the air source heat pump thermal water wood barrel hot water system and by using an indoor air changing principle, the system has the advantages of absorbing the heat storage in the outdoor discharging exhaust, producing domestic water with low cost and intensifying indoor space, thus expanding the application range of the air source heat pump.

The invention relates to an electrified railway unmanned inspection vehicle. The vehicle comprises a chassis system, a lifting mechanism and a mobile platform system, wherein the chassis system is used for achieving walking on a rail, the lifting mechanism is used for achieving ascending and descending at the vertical height, and the mobile platform is used for taking photos of an overhead line system. The chassis system comprises a chassis frame, and a driving system and a first control cabinet are installed on the chassis frame; the lifting mechanism comprises an outside frame, a middle frame and an inside frame; the lower end of the lifting mechanism is installed on the chassis frame, and the upper end of the lifting mechanism is provided with the mobile platform system which is provided with an industrial camera and a second control cabinet; the second control cabinet is internally provided with a wireless launching device. The electric shock risk that the overhead line system is manually inspected is eliminated, the automated overhead line system inspection scheme is adopted, so that the labor intensity of a worker is reduced, the labor cost of an enterprise is reduced and the working efficiency is greatly improved.

The invention discloses online automatic equipment and a technology thereof. A switching power supply is grabbed from a production line to a test platform to complete test, and the equipment comprisesa grabbing mechanism which grabs the switching power supply to be tested from the production line automatically, left and right test platforms, a test mechanism, a separator plate separating the production line in a test section, and a horizontal movement platform. When one of the test platforms carries out test, the other carries out positioning. The online automatic equipment and the technologythereof have the advantages that manual work is not needed, the production equipment and utilization efficiency of the equipment are improved greatly, the possibility of an electric shock accident isreduced, and the economic and social effects are high.

The invention discloses a thermostatic toilet seat, which comprises a seat base layer, a heating layer and an insulating layer in sequence. The heating layer and the insulating layer are arranged above the seat base layer. The heating layer is a heat generating film formed by curing the wire paste printed on the base layer. The thermostatic toilet seat also comprises a safety special low-voltage DC power supply used for supplying power to the heat generating film. The insulating layer adopts resin paint with a curing hardness greater than 2H, and the thickness of the insulating layer is less than 0.5mm. Through eliminating the temperature control sensor and seating sensor on the traditional toilet seat, the overall cost is reduced. The thermal conduction distance of the heat generating film to the surface of the seat is reduced, so that the corresponding temperature rises faster while using less power for heating in an efficient and safe way. The surface of the toilet seat is high andmore scratch-resistant, and the structure is simpler. The thermostatic toilet seat is easy to produce with simple process, and the production cost is low.

The invention provides an LED fluorescent lamp and its module. The LED fluorescent lamp includes a lamp tube, a first end cover and a second end cover installed at both ends of the lamp tube, and the lamp tube includes a lamp board, a plurality of LEDs and a light emitting cover , the first end cap is a conductive end, the second end cap is a sealed end, and the positive and negative conductive ends of the lamp board are only led out from the first end cap. The module is provided with a fixing device, which is a lamp tube fixed socket with single-end power supply matching the LED fluorescent lamp, and the first end cover of the LED fluorescent lamp is directly inserted into the lamp tube fixed socket to be electrically connected to an external power supply. The LED fluorescent lamp of the present invention is truly single-ended conduction, so it can completely eliminate the hidden danger of electric shock during installation, has low design cost, low energy consumption, simple installation and operation, and helps to promote the wide-scale popularization of LED fluorescent tubes.

The invention relates to an LED lamp. The LED lamp comprises a tube and a metal lamp holder capable of being used for high-frequency heating, wherein the tube comprises a straight part and necked parts arranged at two ends of the straight part, and smooth transition sections are arranged between the necked parts and the straight part; a lamp belt adheres to the straight part by the aid of an adhesive, and a patch power supply and LED light-emitting units are arranged on the lamp belt; the metal lamp holder is arranged outside the necked parts and is closely connected with the necked parts by the aid of welding mud; the metal lamp holder is 10-12 mm long, the necked parts are 6-8 mm long, and the gap between the metal lamp holder and the necked parts is 1-2 mm; the patch power supply is arranged in the position close to one end of the straight part, and the distance between the patch power supply and the end of the straight part is 3-5 mm. The LED lamp is simple in structure, high in lighting efficiency and low in rejection rate, comprises few components, is beneficial to industrial production line production and has unique technical advantages in aspects of breaking through the production bottleneck and substantially increasing the profit margin of products, and the welding mud is efficient and quick to solidify.

The invention discloses a rapidly assembled lamp, and relates to the field of lighting fixtures. The rapidly assembled lamp comprises a lamp body and an end cover, and the end cover comprises an end cover body, a connecting base and a power seat. The power seat is mounted on the connecting base and electrically connected with the connecting base, the power seat is internally provided with a powercontact with pricking pins, and the pricking pins penetrate through an insulating layer of an external electric wire and are in contact with an inner core of the external electric wire for taking power. The connecting base is provided with a contact piece, and the contact piece is in contact with the power contact to realize the electrical connection of the power seat and the connecting base. Theconnecting base is provided with buckles, and the end cover is mounted on the lamp body through the buckles in a clamped mode. The rapidly assembled lamp improves the assembly efficiency.

The invention provides a novel device which combines an air source heat pump system and a barrel bath device. The wood bath barrel base space is used for accommodating a water tank, a compressor, an oxygen generator and a surge circulating pump of an air source heat pump water heater. The base is internally provided with an oval square bar as a barrel support frame with the height being 60cm, and internally provided with two bearing water tanks, the water tank 1 is a heat pump heating water tank and the water tank 2 is a standby heat storage water tank. The water tank 1 and the water tank 2 are connected by a solenoid valve switch, and the water tanks are connected with a shower spray; a water inlet of the circulating pump is arranged at the bottom of the barrel, a water outlet is respectively provided with six water diversion guiding tubes which are connected with the barrel, and an oxygen outlet of the automatic oxygen generator is arranged below the external flanging of the barrel. The provided air source heat pump barrel health bath system can achieve the effect of spa massage and indoor oxygen bar while bathing. By adopting air source heat pump principle, the energy in the waste gas discharged to the outdoor is recycled to prepare cheap domestic hot water and indoor space is intensively used.

The invention relates to a power cable maintenance device, and specifically relates to a device for removing a nest on a concrete pole. The device comprises an insulating handle and grabbing hands. The insulating handle comprises a main handle and an auxiliary handle, which are connected with each other in a rotating manner through a rotating handle. The length of the auxiliary handle is 0.1-0.2 times long as much as the length of the main handle. The tops of the main handle and auxiliary handle at a side of the rotating handle are symmetrically provided with the grabbing hands. The grabbing hands are wrapped by a buffering rubber sleeve which is provided with antiskid stripes. A part, at the other side of the rotating shaft, of the main handle is in a hollow structure, and one end, close to the rotating shaft, of the hollow part of the main handle is fixedly provided with a fixed pulley. A pulling rope passes through the pulley, and one end of the pulling rope is connected with a hand-operated device which is fixed at the bottom of the main handle. The other end of the pulling rope passes out from the main handle to be connected with the bottom of the auxiliary handle. A telescoping spring is disposed between the main handle and the auxiliary handle. The device can quickly disassemble the nest and other foreign matters on a cement tower, is safe and convenient, saves time and labor, and improves the removing efficiency of the nest while protecting baby birds.

The invention discloses a safe socket with a protective cover plate. An opening is arranged in a socket box, and a socket plate covers the opening and is provided with a through hole. One end of a rotary shaft is fixedly connected on the bottom wall of the socket box, and the other end extends and penetrates through the through hole to connect with a rotary sheet. Three socket holes are arranged in the rotary sheet which is sleeved inside a sleeving hole and can spin. A rotary cover covers the rotary sheet and is provided with three bar-shaped holes matching with the three socket holes. The rotary cover can rotate coaxially with the rotary sheet to expose or cover the three bar-shaped holes, and the protective cover plate is arranged on the socket plate. One end of the protective cover plate is hinged to one side edge of the socket plate, and the other end of the protective cover plate is provided with a buckle. A gap is arranged in the direction from the buckle to the hinge. The gap is smaller than the cross section of a plug and greater than the cross section of a connecting wire on the plug. The protective cover plate rotates, so that the buckle matches with a buckle groove, the protective cover plate is fixed and a wire extends out from the gap. The safe socket has the advantages of simple structure, convenient use and high use safety, and electric shock accidents of children randomly plugging plugs can be prevented.

The invention provides a multifunctional portable power distribution switching operation handle. The multifunctional portable power distribution switching operation handle comprises a sliding rod, a sliding head, an insulating rod and a cabinet opening key, wherein a circular hole is formed in the upper part of the sliding head; the sliding rod can pass through the circular hole to form the T-shaped sliding rod with the sliding head; a quadrangular bolt in which a clamping groove is formed is arranged below the sliding head; one end of the insulating rod is connected with T-shaped sliding rodand the clamping groove in the quadrangular bolt, and the other end of the insulating rod is in joggled with the cabinet opening key. The multifunctional portable power distribution switching operation handle has the beneficial effects that according to the multifunctional portable power distribution switching operation handle, by using the principle of a sleeve, the integration and universalization of special tools are realized, special tools do not need to be configured on specific high-voltage switches any longer, so that the quality and efficiency of daily maintenance operation are greatlyimproved, and daily operation of the high-voltage switches is met.

The invention discloses a safe socket possessing a waterproof cover. A rotation sheet is provided with three-hole socket holes, is arranged in a sleeve arrangement mode through a sleeve hole and is automatically rotated. A rotation cover covers the rotation sheet and is provided with three strip holes cooperated with the three-hole socket holes. The rotation cover can be coaxially rotated with therotation sheet so as to expose or cover the three-hole socket holes. A socket plate is provided with a protection cover plate. One end is hinged to a side edge of the socket plate and the other end is provided with a grasp buckle. A gap is arranged along a direction from the grasp buckle to a hinge position. A size of the gap is less than a cross section of a plug and is greater than a cross section of an electrical wire connected to the plug. The protection cover plate is rotated so that the grasp buckle is cooperated with a grasp buckle groove. The protection cover plate is fixed and the electrical wire is extended from the gap. An external portion of the protection cover plate is provided with the waterproof cover. The structure is simple, usage is convenient, an electric shock accident generated because children randomly plug the plug is avoided, waterproof and conductive performance is good, and usage safety is high.

The invention provides an auxiliary noise detection device for a power transformer, which is used for detecting the noise of the power transformer and comprises a base which is a hollow shell and is placed on the ground; a lifting rod suite which can realize the combination of a plurality of rod bodies with a lifting function, the bottom end of the lifting rod suite is arranged in the shell of the base, and the top end of the lifting rod suite extends out of the upper surface of the base; a noise detection module which is used for detecting and analyzing the noise of the power transformer; and a lifting power module which is used for providing power for lifting of the lifting rod suite and is arranged in the shell of the base. According to the invention, the workload of power transformer noise detection can be reduced, operators are reduced, the detection efficiency is improved, and the electric shock risk of handheld detection is eliminated.

The invention relates to a high-voltage pull rod, in particular to a 110KV waterproof high-voltage pull rod, which includes an insulating rod wrapped with an insulating coat on the outside, and the two ends of the insulating rod are respectively sleeved with an upper insulating joint and a lower insulating joint, an upper insulating joint and a lower insulating joint A group of umbrella groups is arranged on the insulation pole between, and described group of umbrella groups includes the first umbrella group, the second umbrella group and the third umbrella group, the first umbrella group, the second umbrella group and the third umbrella group The diameter of umbrella group decreases successively. In the present invention, a group of umbrella groups with different diameters are arranged on the insulating rod between the upper insulating joint and the lower insulating joint. When operating outdoor high-voltage live equipment in haze, sporadic rain and snow weather, it can effectively block rainwater from flowing down the pull rod, eliminating It eliminates the hidden danger of electric shock, and at the same time cuts off the extended arc generated during operation, ensuring the safety of operators, improving safety benefits, high safety, economical and practical, and high reliability.

The invention relates to a high-pressure draw bar, in particular to a mining 10KV waterproof high-pressure draw bar. The mining 10KV waterproof high-pressure draw bar comprises an insulating bar (2), an upper insulating joint (1) and a lower insulating joint (4), wherein the upper insulating joint (1) and the lower insulating joint (4) are sleeved at two ends of the insulating bar (2) respectively. A parachute cluster (3) is arranged on the insulating bar (2) between the upper insulating joint (1) and the lower insulating joint (4). When an outdoor high-pressure electrified device is operated in haze and sleet, rain is effectively prevented from flowing down along the draw bar and an electric shock hazard is eliminated. Meanwhile, a lengthened electric arc generated in the process of operation is separated, the safety of an operator is guaranteed, safety benefits are improved, and the mining 10KV waterproof high-pressure draw bar is high in safety, economical, practical and high in reliability.

The invention relates to a magnetic field direction switching technology, in particular to a magnetic field direction fast switching device suitable for Helmholtz coils. The invention solves the problems of slow switching speed and poor operation safety in the existing magnetic field direction switching technology. A magnetic field direction fast switching device suitable for Helmholtz coils, comprising a main body and a control part; the main body includes a rectangular substrate, first to fourth insulating strips, first to sixth conductive strips, the first One to eighth field effect transistors, one to sixteenth conductive strips; the control part includes a first BNC connector, an isolation circuit, a fifth resistor, a switch circuit, second to fifth BNC connectors, a first capacitor, Second capacitor, three-terminal voltage regulator. The invention is suitable for switching the direction of the magnetic field.