111results about How to "Conduct electricity" patented technology

A mold-casting structure comprises at least one dishing and a plurality of micro-protrusions. The dishing(s) formed on the surface of a mold-casting body, the plurality of micro-protrusions sticking out of the surface of the dishing, and the tops of the micro-protrusions constitute on a plane, so that the grounding issue of the circuitry embedded in the mold-casting structure caused by the dishing can be resolved. The dishing can be verified by daubing paint and scrapping thereafter, the location of remaining paint is deemed the dishing. Moreover, a three-dimensional measurement instrument can be employed for more precise measurement. The micro-protrusions can be formed on the dishing by mechanical processing or electric discharge machining (EDM). Alternatively, a mold with a structure matching the micro-protrusions can be formed first, and consequently the micro-protrusions are formed directly by mold-filling, which is more suitable for mass production.

The invention relates to a method or preparing a functional vinyl polysiloxane nanofiber membrane, belonging to the technical field of processing of textile materials. The method comprises the following steps: mixing vinyl polysiloxane, functional nanoparticles and an organic solvent according to proportions to prepare a spinning solution; carrying out electrostatic spinning by using an electrostatic spinning machine; collecting; and finally drying to obtain the functional vinyl polysiloxane nanofiber membrane. The functional vinyl polysiloxane nanofiber membrane prepared by the preparation method disclosed by the invention can realize a synergistic effect of multiple functions, can be widely used for biomedicine, energy and chemical industry, water purification, air filtration, lithium ion battery separators and carrier materials and also can be used for preparing self-cleaning, waterproof and windproof, windproof and heat preservation, moisture-permeable and air-permeable textile materials. The preparation method disclosed by the invention is simple, high in production efficiency, low in energy consumption, free of pollution to the ecological environment and suitable for industrial production.

The invention discloses a GaN-based MS grid enhancement type high electron mobility transistor and a manufacture method thereof which mainly resolve the problems of low current density and poor reliability of a GaN-based enhancement type device. The structure of the device is that a transition layer (2) and a GaN main buffer layer (3) are sequentially arranged on a lining (1), a groove (4) is etched in the middle of the GaN main buffer layer, an AlGaN main barrier layer (5) is respectively arranged above the GaN mian buffer layer (3) on two sides of the groove, and a GaN auxiliary buffer layer (6) and an AlGaN auxiliary barrier layer (7) are sequentially arranged on the inner wall of the groove and the surface of the AlGaN main barrier layer (5) on two sides of the groove. A source electrode (8), a drain electrode (9), a grid electrode (11) and a medium layer (10) are arranged on the AlGaN secondary barrier layer (7). The source electrode (8) and the drain electrode (9) are respectively located on two sides above the AlGaN auxiliary barrier layer (7), the grid electrode (11) is located in the middle above the AlGaN auxiliary barrier layer (7), and the medium layer (10) is distributed on an area outside the source electrode, the drain electrode and the grid electrode. The transistor has the advantages of being good in enhancement type characteristic, high in current density, high in breakdown voltage, simple and mature in manufacture process and high in reliability, thereby being capable of being used in high temperature switch devices and digital circuits.

The invention discloses a porous ceramic heating element used for an electronic cigarette and a preparation method of the porous ceramic heating element. Electrodes are welded on the two ends of a porous ceramic matrix to obtain the porous ceramic heating element used for the electronic cigarette. The porous ceramic matrix is mainly prepared by preparing silicon carbide, alumina, silicon dioxide,molybdenum disilicide, magnesium oxide and a pore-forming agent in a certain proportion, then forming, sintering and other processes. The electrodes are formed by a metallized layer process. The porous ceramic heating element has a simple process and a stable structure and has no need for burying heating wires. The porous ceramic heating element can generate heat by itself, is uniform in heating and high in thermal conductivity, tobacco tar adsorbed in gaps can be heated evenly, and thus the heating uniformity, the heating efficiency and the taste of the electronic cigarette are all effectively improved.

The invention discloses adhesive tape used as a shielding cover and application of the adhesive tape. When used as the shielding cover, the adhesive tape is excellent in shielding effect, thin and light. The adhesive tape comprises a release layer, a conductive adhesive layer, a fiber layer, a conductive adhesive layer, a conductive base body layer and an anti-oxidization conductive coating which are sequentially connected. The thickness of the adhesive tape is 0.03-0.3 mm. The conductive base body layer is a copper foil layer, an aluminum foil layer, a conductive fabric layer or a stainless steel layer. The thickness of the conductive base body layer is 0.005-0.25 mm. The adhesive tape can achieve electricity conductivity, shielding, grounding, anti-oxidization, heat conductivity and the like at the same time.

The invention provides a preparation method of a temperature-sensitive gel. The preparation method comprises the following steps: dispersing liquid metal, N-isopropylacrylamide and derivatives thereof, a cross-linking agent and an initiator in a medium to obtain a mixed solution; and enabling the mixed solution to form a prefabricated body on a carrier, and carrying out first curing treatment. Thetemperature-sensitive gel can respond to the change of the external temperature, and when the external temperature reaches a preset temperature T2, the liquid metal dispersed in the first polymer isswitched between a continuous phase and a dispersed phase. The prepared temperature-sensitive gel has a negative temperature effect and can realize electric conduction when the external temperature reaches the preset temperature T2; and the liquid metal has good conductivity and heat transfer performance, so that the temperature-sensitive gel has high sensitivity. The invention also provides the temperature-sensitive gel prepared by the preparation method, a temperature-sensitive sensor and a preparation method of the sensor.

The invention discloses a power strip assembly convenient to use. The power strip assembly comprises two support members and two power strip mechanisms. The two support members are opposite to each other. Each support member is provided with a sliding groove. The sliding grooves in the two support members are opposite to each other. The two power strip mechanisms are arranged between the two support members. The two power strip mechanisms are opposite to each other. Each power strip mechanism comprises a housing, a plurality of conductive units, a switch unit and two sliding members. A plurality of jacks are formed in the housing. The housing is provided with an accommodating cavity. The plurality of conductive units and the switch unit are respectively arranged in the accommodating cavity. The plurality of conductive units are corresponding to the plurality of jacks one by one. The plurality of conductive units are respectively and electrically connected with the switch unit. The two sliding members are respectively rotationally installed on two ends of the housing. The two sliding members are respectively in movable connection with the sliding grooves in the two support members. A plurality of first clamping members are arranged on the upper surface of the housing of one power strip mechanism, and a plurality of first clamping matching members are arranged on the lower surface of the housing. The usage effect of the power strip assembly is good.

The invention discloses a chloride ion concentration detection device of a reinforced concrete structure and a nondestructive testing method thereof. The device comprises detection single units (1) and a direct current power supply, wherein a stainless steel plate (3) is arranged in each detection single unit; a cover plate (2) of each detection single unit, a water-proof protective housing (1) and the surface of the reinforced concrete structure (4) form a closed cavity; electrolyte solution is injected into the cavity; the stainless steel plate (3) is also positioned in the cavity; a negative electrode of the direct current power supply is connected with reinforcement (4.1) of the reinforced concrete structure (4), and a positive electrode of the direct current power supply is connected with the stainless steel plate (3) of each detection single unit through a wire; the key point of the method is that the chlorine ion concentrations at different time points correspond to the chlorine ion concentrations of different depths of the reinforced concrete structure (4). According to the device and the method, the chlorine ion concentrations of different depths of the reinforced concrete structure (4) can be effectively detected, the detection process is convenient, and structural damage is not caused.

The invention provides a PCB manufacturing method and a PCB. The method comprises steps that, a substrate is drilled to form a plugging hole; a first copper layer is plated on a surface of the substrate, and copper plating on an inner wall of the plugging hole is carried out; the plugging hole is filled by employing resin till the resin projects out of the plugging hole port; material decrease processing on the resin projected out of the port is carried out to make the resin project out of the surface of the port and be level with the surface of the first copper layer; the substrate is drilled to form a non-plugging hole; a second copper layer is plated on the first copper layer, and copper plating on the inner wall of the non-plugging hole is carried out; a substrate graph is shifted; the substrate is etched to form a conductive line. The PCB is manufactured through the PCB manufacturing method, the non-plugging hole quite near the plugging hole is quite clean internally, when on-off tests on the PCB are carried out, after the non-plugging hole is detected by a probe, the probe can tightly contact with the conductive copper layer of the hole wall of the non-plugging hole to realize conduction, and thereby efficiency for determining functions of the PCB can be greatly improved.

An electrically conductive filter bag and a production method thereof belong to the technical field of electrically conductive bag. The electrically conductive filter bag includes a bag body (1) and q bag bottom sewn at the bottom of the bag body (1); the bag body (1) is provided with a double-layer edge for sewing (2); the double-layer edge (2) is internally provided with a conductive strip (3); the conductive strip (3) is fixed by suture (7) sewn on the double-layer edge; the upper end of the bag body (1) is provided with an annular skeleton; the top of the conductive strip (3) exposes from the top of the double-layer edge (2), and winds from the inside of the bag body (1) to the outside of the bag body (1), and is then fixed below the annular skeleton onto the bag body (1); and the bottom end of the conductive strip (3) exposes from the bottom of the double-layer edge and is placed outside the bag body (1). The electrically conductive filter bag has good conductive effect, prevents conductive failure caused by collision of the keel and the conductive strip in the bag body. The production method completes sewing of the bag body and the conductive strip in one step, and improves the production efficiency of the electrically conductive filter bag.

The invention provides a model verification method for a prediction model of an underwater ship corrosion-related static magnetic field. The method comprises the following steps: firstly, simulating seawater and ocean environments in a lab, constructing a ship model and an impressed current cathodic protection system of the ship model according to a certain scale ratio, measuring electric scalar potential distribution below the ship model, and constructing the horizontal current line prediction model of the underwater ship corrosion-related static magnetic field; secondly, loading a horizontal current line in the same experimental environment to replace the ship model, repeatedly measuring electric scalar potential in the same position below the ship model, and synchronously measuring magnetic field distribution in water; thirdly, comparing the measured electric scalar potential of the current line with a measurement result of the ship model to prove the feasibility of field source equivalency; comparing the measured magnetic field with a prediction result of the prediction model to prove the correctness of a prediction process of the prediction model. According to the method, the feasibility of field source equivalency is proved by comparing the electric field distribution, and the correctness of the prediction process is proved by comparing the magnetic field distribution, so that a model verification problem of the prediction model of the underwater ship corrosion-related static magnetic field is solved.

The invention discloses a suction cup type micro-arc oxidation clamp. The suction cup type micro-arc oxidation clamp is composed of a conductive nut 1, a sealing washer 2, a PVC pipe 3, a conductive spring 4, an electrode 5 and a suction cup 6, wherein the two ends of the PVC pipe 3 are connected to the conductive nut 1 and the suction cup 6 through threads respectively, the conductive spring 4 and the electrode 5 are arranged inside the PVC pipe 3, the conductive nut 1 is located at the upper part of the PVC pipe 3, and the sealing washer 2 is located between the conductive nut and the PVC pipe; the conductive nut is composed of a nut body and a copper column, and the copper column penetrates through the center of the nut body and is fixed; the copper column of the conductive nut 1 is located above the conductive spring 4, the T-shaped electrode 5 is located below the conductive spring 4, the diameter of the upper part of the electrode is equal to the outer diameter of the conductive spring, and the work end at the lower part of the electrode penetrates through a center hole of the suction cup; the suction cup 6 is located at the lower part of the PVC pipe 3, and a hole with the diameter equal to the diameter of the work end of the T-shaped electrode is formed in the center of the suction cup 6. The suction cup type micro-arc oxidation clamp is simple in structure, low in manufacturing cost, high in universality, reliable in performance, suitable for most work-pieces with planes and electrolytes different in acid-base property and wide in market prospect.

Te invention discloses a handheld electric tool and belongs to the field of electric tools. The handheld electric tool comprises a machine body. The machine body comprises a handheld portion and a body portion. A drive motor is arranged inside the body portion. The machine body is provided with a battery pack used for supplying power to the drive motor. The battery pack is detachably connected with the handheld portion or the body portion. The battery pack is provided with a storage groove. A light-emitting assembly used for lighting is movably connected into the storage groove. The handheld electric tool has the advantages that the user use freedom degree of the lighting function of the electric tool is better.

The invention discloses an SMD miniaturization packaged VCSEL manufacturing process. The manufacturing process comprises the steps of combining an aluminum nitride bottom plate and a kovar alloy framework together by adopting a positioning clamp; performing sintering in an oxidization atmosphere at an intermediate temperature of 700 DEG C for 70min to complete preparation of an SMD cavity; and fixing a VCSEL chip on the aluminum nitride bottom plate in a eutectic-bonding manner, enabling the VCSEL chip to be connected with a bonding pad electrode by adopting a wire binding (WB) process to complete packaging of the VCSEL chip, putting optical window glass on the SMD cavity of the packaged VCSEL chip, and sealing and fixing the optical window on the kovar alloy framework by adopting a parallel sealing and welding process to complete the manufacturing of an SMD miniaturization packaged VCSEL laser. By virtue of the manufacturing method, the volume, the length (width), height (thickness) of the laser all can be less than 5mm; and meanwhile, the laser is high in heat dissipation and can be pasted on a PCB easily, so that possibility is provided for the application of the VCSEL laser in the miniaturized products in the future.

The invention discloses a preparation method of mutually staggered crescent nickel: iron hydroxide / bismuth vanadate composite material deposited on tin indium oxide (ITO) conducting glass, and belongsto the field of material preparation. The method includes the steps: substrate cleaning; precursor solution preparation; bismuth oxyiodide electro-deposition; bismuth vanadate generation; nickel: iron hydroxide / bismuth vanadate composite material synthesis. The preparation method has the advantages that a large-area crescent composite material structure is formed, technological process is simple,the tin indium oxide conducting glass with high light transmittance and good conductivity is selected as a substrate, environmental pollution is avoided, the operation process is simple, the cost islow, and reaction conditions are easily implemented. The nickel: iron hydroxide / bismuth vanadate composite material can be formed only by a two-step method, visible light absorption can be enhanced, photoelectric conversion efficiency can be improved, and the composite material has a wide application prospect in the fields of photocatalysis, solar batteries and the like.

The invention discloses a method for preparing an aluminum foil power conductive, heat conductive, shock resistance and shielding adhesive tape. The method comprises the following steps: S1, selecting an aluminum foil preparation base material layer; S2, mixing 20-30 parts by weight of nano-grade metal powder and 10-15 parts of nano-grade powdered graphite, adding 40-60 parts of methylbenzene, stirring for 5-10 minutes, adding a 10-15wt% power and heat conductive liquid, stirring for 15-20 minutes so as to obtain a power and heat conductive adhesive; S3, preparing a release material layer from a release material, coating the release material layer with the power and heat conductive adhesive by using a coating machine, curing for 5-10 minutes inside an oven of 80-100 DEG C, curing the power and heat conductive adhesive as a power and heat conductive adhesive layer, and transferring to two sides of the base material layer so as to obtain an aluminum foil double-sided adhesive with release material layers on both sides; S4, preparing a shock resistance material layer from all-direction power conductive sponge. The adhesive tape is simple in structure, comprises an all-direction power conductive sponge layer and a power and heat conductive adhesive layer, and is capable of achieving functions of power conduction, heat conduction, shock resistance and shielding.

The invention discloses a modular self-snow-melting pavement based on graphene and relates to a conductive asphalt pavement. The invention aims to solve the problem that the modular conductive asphaltpavement joint sealing material cannot meet the requirement that the expansion joint is damaged due to the influence of pavement environment change. The problems of discontinuous conduction, energy waste and influence on the ice and snow melting effect due to incapability of adapting to pavement joint and crack width change and incapability of forming a conductive network of the assembled conductive asphalt pavement are solved; the problems that a conductive asphalt pavement is poor in high-temperature stability, low-temperature crack resistance, water stability and fatigue resistance and lowin conductivity are solved. In the modular self-snow-melting pavement, the graphene conductive asphalt layer plays a role in electric conduction and heating, and the conductive shape memory compositematerial is filled in the joint, can actively cater to the width change of the joint and the crack of the pavement, and can be better attached between unit asphalt pavements of the modular self-snow-melting pavement according to the environment change of the pavement so as to realize the joint connection and electric conduction continuity effect. The invention is applied to the field of self-snow-melting pavements.

The invention discloses a reliably connected patch board assembly, which comprises a shell, a switch unit and a plurality of conductive units, wherein a plurality of sockets are arranged on the shell; an accommodating cavity is arranged in the shell; the switch unit is arranged in the accommodating cavity; the switch unit comprises a first electric conductor, a second electric conductor, a bracket and a motion lever; the motion lever is horizontally arranged on the bracket and is movably connected with the bracket; the motion lever is connected with the first electric conductor; the first electric conductor has a first position state and a second position state; when the first electric conductor is located in the first position state, the first electric conductor is separated from the second electric conductor; when the first electric conductor is located in the second position state, the first electric conductor is in contact with the second electric conductor; the plurality of conductive units all are arranged in the accommodating cavity and are arranged corresponding to the plurality of sockets one by one; each conductive unit comprises a connector and two conductive groups; two conductive groups are oppositely arranged; and each conductive group comprises a metal sheet and a spring. According to the reliably connected patch board assembly, the using effect is good.

The invention discloses a drop-out fuse, which comprises a shell, an insulating body, a fuse tube, a fuse wire, a carrying cylinder and an alarm device, wherein the top part of the shell is in a roof-shaped structure which is high in middle part and low in two sides; the insulating body is vertically suspended in the shell; a metal cylinder is fixed at the upper part of the insulating body; a pair of elastic metal plates is obliquely fixed at the middle part of the insulating body; the metal cylinder and the elastic metal plates are connected to a working circuit; the fuse wire is fixedly connected with a metal post, passes through the fuse tube and then is fixedly connected with a metal ball; the metal ball receives resisting force, in opposite directions, of the pair of elastic metal plates; the fuse wire is in a stretched state; a spring sleeves the surface of the fuse tube and is in a compressed state to be propped against the metal post and the metal ball in the opposite directions; the carrying cylinder is located below the metal ball; an infrared sensor is arranged on the outer surface of the carrying cylinder; and the alarm device sends out an alarm after receiving an induction signal. According to the drop-out fuse, the fuse tube and the fuse wire can be sealed in the shell, so that the fuse wire, the fuse tube and metal elements are prevented from being disturbed by wind, rain, snow and heat; and the drop-out fuse can adapt to various severe environments.

The invention discloses a preparation method of copper foil electricity-conducting, heat-conducting, anti-shock and shielding adhesive tape. The preparation method includes the following steps that S1, copper foil is selected and prepared into a base material layer; S2, 20-30 parts by weight of nano-scale metal powder and 10-15 parts by weight of nano-scale graphite powder are mixed, then 40-60 parts by weight of methylbenzene is added, after the materials are stirred for 5-10 min, 10 wt% to 15 wt% of electricity-conducting and heat-conducting liquid is added, the materials are stirred for 15-20 min, and an electricity-conducting and heat-conducting adhesive is prepared; S3, a release material is selected and prepared into a release material layer, the release material layer is coated with the electricity-conducting and heat-conducting adhesive through a coating machine, then the release material layer is cured in an oven at the temperature of 80-100 DEG C for 5-10 min, the electricity-conducting and heat-conducting adhesive is cured into electricity-conducting and heat-conducting adhesive layers, the electricity-conducting and heat-conducting adhesive layers are transferred to the two faces of the base material layer, and the copper coil double-faced adhesive tape with the two sides provided with the release material layers is prepared. The structure is simple, an omni-bearing electricity-heating sponge layer and the electricity-conducting and heat-conducting adhesive layers are arranged, and the electricity-conducting, heat-conducting, anti-shock and shielding effects can be achieved.

The invention discloses conductive anti-corrosion paint and a preparation method thereof. The conductive anti-corrosion paint is mainly prepared from the following ingredients in parts by weight: 24 to 44 parts of carboxyl acrylic resin, 16 to 32 parts of carboxyl acrylic resin curing agents, 4 to 12 parts of conductive filling materials, 0.5 to 3.2 parts of diluents, 0.8 to 3.8 part of preservatives, 0.3 to 1.6 parts of coupling agents, 0.2 to 0.8 part of flatting agents and 15 to 35 parts of solvents. The paint recipe and proportion are optimized, so that the conduction and anti-corrosion functions of the paint are realized; the spray coating or brush coating mode is used for preparing the conductive anti-corrosion coating on the surface of the treated workpiece; the paint can be widelyused on metal structure elements of electric industry grounding net device, petrochemical industry oil storage devices and the like; the functions of conduction, static electricity conduction, anti-corrosion and the like can be realized; the field use requirements are met.

The invention relates to the technical field of 5G technology related equipment, and discloses an automatic protection 5G signal receiving device, which comprises an annular shell, a signal receiver is fixedly connected in the annular shell, and a protection mechanism for preventing hail impact on the signal receiver is arranged in the annular shell. The protection mechanism comprises a sensing assembly for sensing hail impact and a protection assembly for preventing hail from entering the annular shell, and an anti-collision mechanism for protecting the annular shell when the annular shell falls off is arranged in the annular shell. The impact of hail is borne through a first impact plate and a second impact plate, so that the second impact plate can drive a movable frame outside the second impact plate to move, and then a first box cover and a second box cover move under the linkage action of a teeth, a rotating shaft and a gear, so that the impact of the external hail is shielded; in this way, the signal receiver can be protected through non-electric-energy mechanical linkage to a certain extent.

Actuator elements are accommodated in openings formed in a conductive plate. These actuator elements are secured to the conductive plate by a resin bonding material. An electrode of each actuator element and the conductive plate are electrically connected to each other by a bridge junction consisting of an conductive paste. A paste application device discharges the conductive paste toward the bridge junction by air. A control unit configured to control the discharge of the conductive paste sets the air pressure according to the elapsed time of use of the conductive paste so that the height of the paste above the resin bonding material is not less than a target height. The target height is maintained by increasing the air pressure with increase of the elapsed time of use of the conductive paste.

The invention discloses a conductive anticorrosion coating and a preparation method thereof. The coating is mainly prepared from acrylic resin, an acrylic resin curing agent, a carbon nanotube, spherical graphite, nanometer conductive carbon black, an anticorrosion agent, a diluent, a flame retardant and a solvent. The conductive anticorrosion coating adopts a spraying or brushing mode to preparea conductive and anticorrosion coating layer on the surface of a well-treated workpiece, and can be widely applied to metal structural pieces such as grounding grid devices in the power industry and oil storage devices in the petrochemical industry, achieves the functions of electricity conduction, static electricity conduction and corrosion resistance, and meets the field service requirement. Thepreparation technology of the coating is simple, and industrialized production can be achieved easily.

The invention relates to the technical field of hydrophilic glass and in particular relates to a super-hydrophilic agent. The super-hydrophilic agent is characterized by being composed of the following components in percentage by weight: 0.1-0.45% of ZnO nanorod, 1.5-5% of carbon nano tube powder, 12-18% of N,N-dimethylformamide and the balance of dispersion, wherein the carbon nano tube powder is single-walled or multi-walled carbon nano tube powder; and the carbon nano tubes are attached to the surface of the ZnO nanorod. The invention further provides a preparation method of the super-hydrophilic agent and super-hydrophilic window glass provided with a super-hydrophilic coating. The super-hydrophilic agent disclosed by the invention has the advantages that the super-hydrophilic agent is high in visible light transmittance and capable of absorbing infrared and ultraviolet radiation and has excellent super-hydrophilic characteristics under non-illumination conditions.

The invention relates to a bis phosphonic acid functional organosilicon high temperature proton conductor and a preparation method thereof, the preparation method of the proton conductor is as follows: (1) hydroxyethylidene bis-phosphonic acid tetrasodium salt and tetrahydrofuran are added into a four-mouth flask, completely dissolved, then heated to 45-60 DEG C, and then slowly added dropwise with isocyanate propyl trimethoxy silane, after the reaction is completed, bis phosphonic acid trimethoxy silane can be obtained; (2) the bis phosphonic acid trimethoxy silane as a main hydrolysis precursor, amino propyl trimethoxy silane and tetraethoxysilane as auxiliary hydrolysis precursors, ethanol as a solvent, and a suitable amount of hydrochloric acid as a catalyst are stirred at room temperature to obtain a sol; (3) the sol is dried, demoulded, and soaked with hydrochloric acid for post-processing to obtain the bis phosphonic acid functional organosilicon high temperature proton conductor. The bis phosphonic acid functional organosilicon high temperature proton conductor prepared by the method has high conductivity, good hydrolysis stability and thermal stability.

The invention discloses a 10KV high-voltage drop-out fuse temporary through-flow device with overcurrent protection, and the device comprises a clamping device and a safety device; two ends of the safety device are respectively arranged at two ends of the clamping device, and the lower end of the clamping device is communicated with a lower pile head of a drop-out fuse. The upper end of the clamping device is communicated with the upper pile head of the drop-out fuse, so the safety device can communicate the lower pile head and the upper pile head of the drop-out fuse to form a passage. Through cooperation of the clamping device and the safety device, a passage with a temporary conductive function is formed and clamped on the drop-out fuse to realize conduction of a circuit, so the problemof overlong power failure time caused by incapability of timely arrival of live-line repair personnel is solved, and convenience and quickness are realized.