47results about How to "Full conduction" patented technology

The invention discloses a fused salt heat treatment method for rubbish incineration fly ash, and belongs to ash treatment methods. The method solves the problems that the treatment temperature is high, the energy consumption is large and poisonous trace elements cause secondary pollution through existing treatment methods for the rubbish incineration fly ash. The method includes the steps of preparing mixed fused salt, carrying out fusing heat treatment, detecting the content of heavy metal and extracting and recovering the heavy metal. According to the method, chlorides, sulfate and partial heavy metal in the fly ash can be dissolved out through the fusing, heat storing and reacting characteristics of the fused salt, processes are relatively simple, reaction conditions are mild and easy to control, leaching of the heavy metal in the fly ash can be effectively controlled in an environment, the treated fused salt can be recycled, deep enrichment and recovery of the dissolved heavy metal can be carried out, the harm level of treated residues is greatly lowered, building material utilization and secure landfill of the treated residues can be conveniently carried out, secondary pollution is effectively reduced, the resource utilization efficiency is improved, and light reduction, harmlessness and resource utilization of the rubbish incineration fly ash can be realized synchronously.

The invention discloses a needleless electrostatic spinning device with a porous flexible pipe. The device comprises a spinning solution storage chamber, a hydraulic pump, a porous flexible pipe, a supporting framework, clamping hoops, a high-voltage static generator, receiving net curtains and guide rollers, wherein the hydraulic pump is connected to the spinning solution storage chamber; a feeding hole is located in one end of the porous flexible pipe; the porous flexible pipe is fixed on the supporting framework by the clamping hoops made of an insulating material; the clamping hoops and the supporting framework are connected by threads; the other end of the porous flexible pipe is sealed by a pipe joint; the high-voltage static generator is connected to the outer surface of the porous flexible pipe; receiving devices are located right above and right below the porous flexible pipe; the guide rollers are fixed on the supporting framework; the receiving net curtains are fixed on the guide rollers; the receiving net curtains can output packaged nano-fiber mats with rolling of the guide rollers, and the receiving net curtains are grounded by conducting wires. The device disclosed by the invention has the advantages that the bore diameter of an inner pipe can be changed through adjustment of the back pressure of a spinning solution inside the pipe based on adjustment of the hydraulic pump, and metal wire edges distributed in various forms can be formed on the surface of a metal flexible pipe, so that more jet flows can be generated easily.

The invention discloses a voltage transformer handcart. The voltage transformer handcart comprises a vehicle frame, a rocker-in mechanism, a voltage transformer, a spring, a high-pressure fuse, a plum blossom-shaped contact, a contact arm, a connected insulator, an aviation plug and a bog panel, wherein an observing window is formed in the big panel; the spring and the high-pressure fuse are arranged in the contact arm; the plum blossom-shaped contact is arranged on the end part of the contact arm; the contact arm is connected with the connected insulator. The voltage transformer handcart has the excellent effects that the voltage transformer handcart is suitable for a PT cabinet and a metering cabinet; as an independent drawing unit, the voltage transformer can flexibly go into / out of a power distributing system, and the normal operation of other equipment is not affected; the voltage transformer handcart is very convenient in repairing and low in failure rate and has good interchangeability.

The invention aims to provide preparation of a flaky MoS2-x coated hollow porous carbon sphere@sulfur composite material and application in a sulfur positive electrode of a lithium-sulfur battery. According to the S@C@MoS2-x composite material, the outer surface of the hollow porous carbon sphere material is coated with MoS2-x with flaky sulfur defects, sulfur is distributed in pores of a hollow carbon sphere cavity and a porous carbon layer, the content of carbon in the composite material is 5%-30%, the content of MoS2-x is 5%-30%, and the content of sulfur is 40%-90%. The cavities and rich mesoporous structures of the hollow porous carbon spheres provide sufficient sulfur fixation space, the utilization rate of active substances is ensured, meanwhile, infiltration of electrolyte is facilitated, and rapid conduction of ions and electrons under high multiplying power is met; more importantly, the flaky MoS2-x coating layers on the outer surfaces of the carbon spheres have relatively strong chemical adsorption and catalytic action on dissolved polysulfide, and the shuttling effect of lithium polysulfide can be effectively relieved in combination with the physical action of the carbon layers, so that the capacity retention ratio, the cycling stability and the rate capability of the battery are improved.

The invention discloses a direct-current supporting thin-film capacitor resistant to large ripple currents. The direct-current supporting thin-film capacitor comprises a capacitor body, which comprises a core group, upper and lower busbars and an insulating layer, wherein the core group comprises cores, the core is formed by winding a metallized polypropylene film, the film has a metal conductivearea, a plurality of T-shaped insulating areas are arranged on the metal conductive area, fuses are arranged between adjacent T-shaped insulating areas, the cores are arranged into two layers up and down, the lower busbar is arranged on one side of the core group and connected with the cores through welding copper plates, the upper busbar is of a [-shaped structure, the core group and the lower busbar are installed in the upper busbar, the cores are connected with the upper busbar, the insulating layer is arranged between the upper and lower busbars, the capacitor further comprises a shell made of a heat dissipation material, the capacitor body is installed in the shell and encapsulated through an epoxy resin, the upper busbar and the lower busbar are provided with connecting terminals located outside the shell, and the shell is provided with a heat dissipation face. According to the invention, the ripple current resistance can be improved, the equivalent series resistance and thermalresistance are reduced, and sufficient heat dissipation is realized.

The invention discloses an incineration tower capable of gasifying and melting domestic waste directly. The incineration tower capable of gasifying and melting domestic waste directly comprises a feeding port, a tower bin, a heat collector, a secondary combustion chamber, an incinerator, a drying machine, a smoke pipeline, a cooling furnace and a heating system. The feeding port is formed in the top end of the tower bin. The smoke pipeline is arranged above the tower bin. A discharging port and an ash circulating outlet are formed in the bottom of the tower bin. The ash circulation outlet is connected with an inlet of the incinerator. The incinerator is further provided with an ash outlet and a waste gas outlet. The ash outlet is connected with a heat conduction inlet of the drying machine. The waste gas outlet is connected with the secondary combustion chamber. The heat collector comprises a heat collection pipe, a heat collection disc and S-shaped guide pipes, wherein the lower portion of the heat collection disc is connected with the heat collection pipe, the bottoms of the S-shaped guide pipes are mounted on the heat collection disc, and the S-shaped guide pipes are evenly distributed in the tower bin. The secondary combustion chamber is connected with heat collection pipe. An inlet of the cooling furnace is connected with the smoke pipeline, and an outlet of the cooling furnace is connected with the heating system. The incineration tower is small in occupied area, waste sorting is not needed, no comburent needs to be added, investment cost and operating cost are low, maintenance is convenient, and incineration tower can be widely popularized easily.

The invention relates to a turbulent bar structure for a drying cylinder with the functions of high efficiency and energy saving, comprising a plurality of connection rings and bar-shaped turbulent bars, the plurality of connection rings are arranged in a drying cylinder coaxially, and the plurality of turbulent bars which are contacted with the internal wall of the drying cylinder are arranged fixedly and uniformly in radial direction on the peripheries of the plurality of connection rings. The structure is characterized in that each turbulent bar is solid and the external surface thereof is provided with the cambered surface capable of attaching to the internal wall of the drying cylinder tightly. The turbulent bar structure of the invention has simple structure, scientific and reasonable number and size of the turbulent bar, and can effectively enhance the heat conductivity of the steam. Compared with the prior art, when the rotating speed is low, the surface temperature of the drying cylinder can be enhanced by 4 to 11 DEG C, and when the rotating speed is high, the surface temperature of the drying cylinder can be enhanced by 6 to 7 DEG C, thereby effectively ensuring the drying effect of the paper when the drying cylinder rotates in high speed, saving the energy on the whole, and enhancing the production efficiency.

The present invention relates to continuous casting apparatus for metallurgical industry, and provides one kind of square aluminum alloy ingot casting crystallizer for equal-level hot top casting of square aluminum alloy ingot. The casting crystallizer consists of one heat insulating hot top duct, one upper crystallizer muff and one lower crystallizer muff connected successively from top to bottom, and one starter head constituting one liquid cavity together with the other parts. Adopting the casting crystallizer can realize two-step locating of secondary cooling crystallization and dummy ingot before casting and the new technological process of equal-level hot top casting of square aluminum alloy ingot, raise the quality of cast square aluminum alloy ingot and raise production efficiency.

The invention discloses a smokeless moxibustion instrument. The smokeless moxibustion instrument comprises a base, wherein an adjustable bracket is fixedly connected to the top of the base; a combustion device is fixedly connected to the other end of the adjustable bracket, and comprises a housing and a combustion cylinder; a limiting piece is fixedly connected to the upper part of the inner wallof the housing; a limiting ring is arranged at the top of the combustion cylinder, and is in contact with the limiting piece; heat insulation foam is arranged between the combustion cylinder and the housing; a heat accumulation piece is arranged at the bottom of the housing; a housing cover is arranged at the top of the housing; a smoke exhausting pipe penetrates through the housing cover, and theother end of the smoke exhausting pipe is arranged in a purifying device; and the purifying device is located on the base. The smokeless moxibustion instrument disclosed by the invention is simple instructure; through the purifying device, smog generated during combustion of moxibustion can be removed, the smog removing effect is good, damage to human bodies can be prevented, and smoke ash generated after the combustion of the moxibustion can be conveniently cleaned; and the heat accumulation piece is arranged, so that heat accumulation can be performed, heat quantity is sufficiently transmitted to acupuncture points, and the effect of the moxibustion therapy is better.

The invention provides a barbecue capable of utilizing the residual heat of charcoal fire for automatic rotation and relates to the field of cooking supplies. The barbecue comprises a barbecue body, skewers, impellers, flat water tanks and a rear baffle; a charcoal placement groove is formed in the upper portion of the barbecue body, skewer placement grooves are uniformly formed in the front edgeof the charcoal placement groove, impeller mounting holes are uniformly distributed in the rear wall of the charcoal placement groove, and the skewer placement grooves are coaxial with the impeller mounting holes; bearings are mounted in impeller mounting shafts, two baffle mounting holes are formed in the rear side of the barbecue body, the flat water tanks are welded to the outer side of the rear wall of the charcoal placement groove, air outlet holes are formed in the upper portions of the flat water tanks, and impeller shafts extend out of the front portions of the impellers; skewer fixingholes are formed in the tops of the impeller shafts, the skewers can be fixed in the skewer fixing holes, a baffle mounting shaft is arranged at the bottom of the rear baffle, partition plates are uniformly arranged on one side of the rear baffle, and air pumping holes are formed in the top of the rear baffle. The rear baffle can be fixed to the rear side of the barbecue body through the baffle mounting shaft and baffle mounting holes, and food on the skewers can be prevented from being burnt.

The invention discloses a band-gap reference trimming circuit suitable for low voltage. The circuit comprises a band-gap reference trimming circuit, an oscillator circuit, a voltage detection circuit, a charge pump circuit and a logic circuit. On the basis that the MOS switch tube is used for controlling and trimming the band-gap reference voltage, the oscillator circuit, the charge pump circuit, the power supply switching circuit and the like are introduced, under the condition that the input power supply VDD is low, the control voltage of the MOS switch tube is improved, it is ensured that the MOS switch tube can be fully switched on, the influence of the on-resistance on the resistance in the band-gap reference trimming circuit is reduced, the problem that the reference voltage of the band-gap reference circuit rises in the low-voltage state of the input power supply is effectively solved, and the consistency of the reference voltage of the band-gap reference circuit under full-voltage input is improved.

An electrode (10) for brain wave measurement is provided with a comb-shaped base member (12), which comprises an elastic body, and a structure formed on the comb-shaped base member (12). The electrode(10) for brain wave measurement is characterized in that the comb-shaped base member (12) comprises a support part (14) and a comb teeth row (17), which comprises multiple comb teeth (16) projectingfrom the support part (14) in a row. The electrode (10) for brain wave measurement is further characterized in that the structure is formed on one side surface of the comb teeth (16) along the comb teeth row (17) and contains multiple nanocarbon members that form an interconnected network structure and are fixed to the comb-shaped base member (12).

The invention provides an integrated gate commutation thyristor device with high current impact (dI / dt) tolerance capability. The device comprises a gate commutation thyristor chip unit and a gate drive unit, wherein the integrated gate commutation thyristor device also comprises one or more of the following components of: a gate drive unit having a triggering current increasing to 10A, a gate commutation thyristor chip having an internal carrier service life being larger than 100us, a gate contact ring cathode surface structure with the cathode current density approximately equal in each areaof the chip, and a single gate commutation thyristor unit with the transverse size shortened to be within 200 um. The integrated gate commutation thyristor device can be fully conducted without beingdamaged under the condition of the high current impact, the anode reactance for limiting the current rising speed in system application is effectively reduced, the volume of an external module is reduced, and the convenience in the application is improved.

An electrode (10) for brain wave measurement is provided with a base member (12), which comprises an elastic body, and a structure formed on the base member (12). The electrode (10) for brain wave measurement is characterized in that the base member (12) comprises a support part (14) and an elastically-deformable tilting part (16) formed so as to project from one surface of the support part (14).The electrode (10) for brain wave measurement is further characterized in that the structure is formed on a surface of the tilting part (16) and contains multiple nanocarbon members that form an interconnected network structure and are fixed to the base member (12).

The invention relates to the technical field of LED lamps, and discloses an LED module based on quick replacement of LED lamp bead modules. And the square metal shell is provided with a square embedding opening in the upper portion and used for clamping the light-transmitting lamp plate into the square metal shell, and a metal grating is arranged below the square metal shell. When a single LED lamp bead breaks down, the lamp bead body is pulled outwards, the LED lamp element assembly on the lamp bead body is separated from the lamp bead groove, then the annular magnetic sleeve and the magnetic block are magnetically separated, the conductive contact rod inserted into the insertion groove can be separated from the power-on element in the lamp bead body in a power-off mode, and at the moment, the lamp bead body is pulled outwards, and the LED lamp element assembly on the lamp bead body is separated from the power-on element in the lamp bead body. The whole lamp bead can be detached, in this way, the faulted lamp body is taken down, then the operation of replacing the lamp bead is achieved, meanwhile, in the using process of the heat dissipation plate on the LED lamp element assembly, heat generated by the lamp body can be fully conducted, then the single lamp bead on the whole LED has the self-heat-dissipation function, and the service life of the whole LED lamp is prolonged. In this way, the convenience of the LED lamp can be improved, and the service life of the LED lamp beads can be prolonged.

The invention discloses a preparation method of high viscosity high strength raw lacquer, and belongs to the technical field of paint preparation. The preparation method comprises the steps: performing drying, mixing and grinding on wood chips and straw firstly, then performing immersion in hydrochloric acid for a reaction after grinding so as to prepare mixed slurry, then performing high-temperature high-pressure treatment on the mixed slurry so as to obtain a reaction hydrolyzate, then putting the reaction hydrolyzate and a biogas liquid into a fermentation tank for fermentation so as to obtain a fermented product, then performing microwave treatment on the fermented product, adding aluminum sulfate after microwave treatment, performing mixing and stirring, then performing concentrationdrying after stirring so as to obtain a dried product, putting the dried product and graphite sheets into a sulfuric acid solution, performing even stirring, then adding potassium permanganate for a reaction, performing filtration after the reaction so as to obtain a filter cake, and finally performing stirring and mixing on the filter cake, a raw lacquer liquid and other aids so as to obtain thehigh-viscosity high-strength raw lacquer.

The invention relates to the technical field of petroleum fractionation, and in particular, relates to a fractionation device in a petroleum coke production process, wherein the fractionation device comprises a first rectifying tower and a second rectifying tower; the top of the second rectifying tower is provided with a second heavy component branch pipe and a second light component branch pipe, and one end of the second heavy component branch pipe and one end of the second light component branch pipe are sleeved with spiral heat conduction pipes; a first heavy component branch pipe is mounted at the top of the first rectifying tower, one end of the first heavy component branch pipe is connected with a first heat exchange mechanism, and an auxiliary mechanism is arranged on one side of a uniform mixing box. Fluid in the uniform mixing box can be fully stirred and sloshed, so that the fluid in the pipeline can be uniformly mixed at a temperature, the temperature difference between a second heat exchange pipe and the spiral heat conduction pipes caused by too high temperature of the outer layer of the pipeline is avoided, the overall temperature of the uniformly-mixed fluid is uniformly mixed, the temperature difference between the second heat exchange pipe and the spiral heat conduction pipes is enlarged, then the secondary heat exchange efficiency is improved, and sufficient absorption of heat in the second rectifying tower is achieved.

Provided are a backplate manufacturing method and a backplate. The backplate manufacturing method comprises the steps of providing a first substrate and a second substrate, wherein the top of the first substrate is provided with a groove, the bottom of the second substrate is provided with a convex part, and the convex part is matched with the groove; placing a solder at the bottom of the groove;assembling the first substrate and the second substrate to make the convex part embedded in the groove; melting the solder and welding the first substrate and the second substrate to form the backplate. Because of the obstruction of the groove, the solder can still remain in the groove after being heated and melted and is unlikely to be lost, and therefore the welding quality of the backplate is improved.

A heating apparatus comprises a casing and a heat generation element, the heat generation element being located inside the casing, the casing comprising two layers: an inner layer casing and an outer layer casing, the inner layer casing and the outer layer casing being joined tightly, the inner layer casing using tubing having desirable thermal conductivity, and the outer layer casing using tubing that is rust resistant. The inner layer casing uses tubing having desirable thermal conductivity, so as to transfer heat generated by the heat generation element to the outer layer casing in time and thoroughly, thereby improving thermal conduction efficiency and thermal energy utilization, and extending the service life of the heat generation element. The outer layer casing uses tubing that is rust resistant, and is not easily oxidized from high temperature and contact with water, thereby extending the service life of the heating apparatus. When the inner layer casing uses an aluminum tube, and the outer layer casing uses a stainless steel tube, because of the existence of the stainless steel tube, the aluminum tube does not crack, so that the production process of the heating apparatus is simple, and the service life is long.

The invention belongs to the field of video auditing, particularly relates to a cooling device for auditing short video published information, and aims to solve the problems that an existing cooling device only dissipates heat through a fan and is limited in heat dissipation capacity when in use, the cooling device comprises a base, and the upper surface of the base is movably connected with a heat dissipation box; a heat dissipation box is fixedly connected to the bottom of the base, a water tank is fixedly connected to the bottom of the base, a motor is fixedly connected to the outer wall of one side of the heat dissipation box, and a two-way threaded rod is movably connected between the inner walls of the two sides of the heat dissipation box. The heat dissipation effect of the heat dissipation box is improved, air circulation in the heat dissipation box is improved through rotation of fan blades, air is supplied into the heat dissipation box, water in a spiral pipe circularly flows through movement of a plug and a blocking piece, the angle of the heat dissipation box can be fixed, and the stability of the heat dissipation box is improved.

The invention relates to a PTC (Positive Temperature Coefficient) rapid heating device and method for a dry-type distribution transformer winding, which are used for solving the problems that when the dry-type distribution transformer winding is detected, the winding is heated by adopting a PTC heating sheet, the heating efficiency is low, the heat conduction is slow, the heat dissipation is serious, the PTC heating sheet needs to be manually mounted and dismounted, the efficiency is low, and potential safety hazards exist. Comprising a heating device, a heat transfer device, a clamping device, a lifting mechanism and a control system. A copper wiring terminal of the dry-type distribution transformer is rapidly heated through the heating device, and part of heat dissipated by the heating device is conducted to a copper lead of the dry-type distribution transformer through the heat transfer device, so that the heating efficiency is improved, the time is saved for winding material detection, and the effects of energy conservation and emission reduction are achieved; the walking device, the clamping and lifting mechanism, the heating device and the clamping device are controlled through a control system, and the winding terminal can be heated through automatic control.

The invention provides an indoor heating system which comprises a heat collector assembly and an airflow circulation heating assembly. The heat collector assembly is mainly used for providing heat energy and inputting and outputting a medium. The airflow circulation heating assembly mainly comprises a heat absorber, a heat exchange pipe, an auxiliary heating chamber and various pipelines, whereinthe heat exchange pipe is spirally wound around the heat absorber. The indoor heating system is mainly characterized in that the heat absorber comprises a heat absorber shell and a plurality of heat absorption pipelines, the heat absorption pipelines penetrate through and extend out of the heat absorber shell, and the outer surfaces of two ports of each heat absorption pipe are in sealed connection with the heat absorber shell; one end of each absorption pipeline penetrates through and extends out of the heat exchange pipe, and the outer surface of a port of the heat absorption pipeline is insealed connection with a heat exchange pipe shell; and every two adjacent heat absorption pipelines are spaced by a fixed distance in the length direction of the heat absorber, and the acute angle formed by the cross sections of every two adjacent heat absorption pipelines is 45 degrees. The indoor heating system achieves sufficient absorption of solar heat energy, achieves intelligent heating, has no pollution and is environmentally friendly.

The invention relates to a wind feeding thermal-insulation gas kitchen range, which comprises a frame 14 as carrier, a wind adsorption cover 23, a fan 17, a wind tube 18 and a flameout protection device 27, which are inside the frame. Wherein, the gas fuel burner 16 is at the center of frame groove 21; the fuel gas channel 15, the fuel gas ignition switch 20 and the fan switch 19 are on the frame 14; the burning chamber 1 of frame thermal insulation gas kitchen range core is embedded into the chamber of range core support wall 11; the range core support can use the flame thermal insulation gas kitchen range core in any kinds. And the invention can be produced in batch.

The invention relates to a turbulent bar structure for a drying cylinder with the functions of high efficiency and energy saving, comprising a plurality of connection rings and bar-shaped turbulent bars, the plurality of connection rings are arranged in a drying cylinder coaxially, and the plurality of turbulent bars which are contacted with the internal wall of the drying cylinder are arranged fixedly and uniformly in radial direction on the peripheries of the plurality of connection rings. The structure is characterized in that each turbulent bar is solid and the external surface thereof isprovided with the cambered surface capable of attaching to the internal wall of the drying cylinder tightly. The turbulent bar structure of the invention has simple structure, scientific and reasonable number and size of the turbulent bar, and can effectively enhance the heat conductivity of the steam. Compared with the prior art, when the rotating speed is low, the surface temperature of the drying cylinder can be enhanced by 4 to 11 DEG C, and when the rotating speed is high, the surface temperature of the drying cylinder can be enhanced by 6 to 7 DEG C, thereby effectively ensuring the drying effect of the paper when the drying cylinder rotates in high speed, saving the energy on the whole, and enhancing the production efficiency.

The invention discloses an efficient energy-saving boiler. A boiler body and a boiler container are included. The boiler body is internally provided with a first vertical pipe and a second vertical pipe. The lower end of the first vertical pipe communicates with the boiler container. The upper end of the first vertical pipe is closed. The second vertical pipe upwards penetrates through the outer wall of the boiler body. The lower end of the second vertical pipe is closed. Each of the ends, getting close to each other, of the first vertical pipe and the second vertical pipe fixedly communicateswith one short pipe. The efficient energy-saving boiler has the advantages that multiple heat conduction pipes are arranged in the efficient energy-saving boiler, an automatic control device controlshot air in the boiler to flow into the heat conduction pipes from the positions of short pipes at different positions, it is ensured that the obvious temperature difference exists between the hot airof the heat conduction pipes and the water at the position, hot air generated due to boiler combustion can stay in the heat conduction pipes at the obvious temperature difference position for a longtime, heat in the hot air can be sufficiently conducted into water, and energy of energy heating in the boiler is utilized to the maximum.

The invention discloses an efficient textile automatic dehydration drying device. The efficient textile automatic dehydration drying device comprises a placement box which is internally provided witha placement cavity, the left end wall and the right end wall of the placement cavity communicate with the external space, and the interior of the placement cavity is provided with a drying mechanism;the drying mechanism comprises two outer drying barrels which are symmetrically and fixedly arranged on the rear end wall of the placement cavity in the vertical direction and provided with drying cavities having forward openings; the rear end walls of the drying cavities are internally provided with drying power cavities; and the rear end walls of the drying power cavities are fixedly provided with drying motors. According to the efficient textile automatic dehydration drying device, by designing the two drying barrels, multiple times of drying is achieved, textiles are driven by magnetic rods to rotationally dried in the drying cavities, the drying efficiency of the textiles can be improved, and heat required by drying is sufficiently transmitted; and the drying barrels of the device isnot completely sealed, the overheat phenomenon generated in the drying process can be well avoided, and accordingly, high efficiency and safety of drying are achieved.

The invention discloses a high-frequency transformer. The high-frequency transformer comprises an oil tank, an oil pump, a heat dissipation part, an oil drain pipe and an oil inlet pipe, the heat dissipation part comprises an annular pipe, a step part is connected below the annular pipe, the step part comprises a plurality of annular plates and cylinders which are arranged from bottom to top, theannular plates are connected with the cylinders, the annular plates and the cylinders gradually increase in radius from bottom to top, spiral grooves which are spirally arranged are formed in the upper portion of the annular plate, a first cooling fin is connected below each annular plate, a hollow ring sleeve is connected to the inner side below the step part, a plurality of annularly arranged first through holes are formed in the outer side of the hollow ring sleeve, the first through hole is located in the inner side of the step part, the inner side of the bottom of the hollow ring sleeve is connected with a plurality of guide pipes in a penetrating mode, the inner sides of the guide pipes are communicated with the oil discharging pipe, the bottom of the hollow ring sleeve is further connected with a fixing ring, and the outer side of the fixing ring is connected with a plurality of annularly-arranged first fans. Defects in the prior art can be overcome, and the high-frequency transformer has a better heat dissipation effect.