212results about How to "Not easy to burn out" patented technology

The invention relates to a light bioreactor for culturing microalgae systematically, which comprises an in-parallel pipe group, a control valve, a pH value sensor, a temperature sensor, a light sensor, a water mist sprayer, a liquid level alarm, a pipe pump, an air inlet pipe, an exhaust pipe, a feed pipe, a discharge pipe, a microporous pipe, a liquid storage tank, a cool and heat exchanger, a control panel, a bracket, a lighting facility and the like, wherein the pipe group and the valve are effectively connected in a close way, specific surface area is enlarged simultaneously when the volume of microalgae is enlarged during culturing, and the invention has small ground occupation, effectively uses stereo space and has sufficient air exchange, and utilization rate is increased; during culturing, the invention monitors parameters such as temperature, pH value, concentration of a culture medium, lighting intensity, and the like in real time, provides the best condition for microalgae growth and metabolism, effectively reduces culturing time, avoids danger of outside harmful creatures, and decreases production cost. The bioreactor can be used for culturing microalgae cells in a continuous or semi-continuous way and producing microalgae protein, biodiesel or aquatic baits and other products.

The invention discloses a liquid crystal display, a light-emitting diode (LED) backlight and a driving method thereof. The LED backlight comprises a direct-current voltage input end, a booster circuit, an LED string and a constant-current driving circuit, wherein the direct-current voltage input end is used for inputting direct-current voltage; the booster circuit is used for boosting the direct-current voltage input through the direct-current voltage input end and outputting boosted direct-current voltage; the LED string comprises a plurality of series-connection LEDs and a first resistor and receives the boosted direct-current voltage from the booster circuit, and the direct-current voltage of the LED string normally emitting light is smaller than or equal to the boosted direct-current voltage output through the booster circuit; and the constant-current driving circuit is used for adjusting voltages at two ends of the first resistor so as to control current in the LED string. When the LEDs are driven to emit light, power consumption of a first metal oxide semiconductor (MOS) transistor in the constant-current driving circuit is lowered, so that power consumption of the constant-current driving circuit is reduced, the temperature is lowered, conversion efficiency of a whole driving circuit of the LED backlight is improved, and components in the constant-current driving circuit cannot be burnt out easily.

The invention discloses a grade braking type ceramic base brake pad system, and relates to the technical field of ceramic base brake pads. According to the system, ordinary brake strength can be adjusted and set freely by a user. The grade braking type ceramic base brake pad system comprises an emergency brake ceramic base friction plate which is fixed at the left end of a steel plate and an ordinary brake ceramic base friction plate which is arranged in a clamping groove in the right portion of the steel plate in a telescopic mode and is controlled by an ordinary brake strength adjusting device. A hydraulic input device is used for pressing a hydraulic agent in a hydraulic agent storage box into a plicated liquid tire band to enable the user to adjust and set the ordinary brake strength freely. A double-pad brake structure with the ordinary brake ceramic base friction plate and the emergency brake ceramic base friction plate being combined is adopted; when a vehicle brakes, only the ordinary brake ceramic base friction plate is used for braking in the ordinary braking condition; the ordinary brake ceramic base friction plate and the emergency brake ceramic base friction plate are used for braking together in the emergency braking condition.

The invention discloses an intelligent thin self-temperature-limiting electric floor heating system, which comprises a remote controller, a temperature control switch and heating modules, wherein the signal output end of the remote controller is connected with at least one temperature control switch through a signal transmission line; each heating module comprises a moisture-proof layer, a heat insulation layer, a superconducting heat insulation cushion layer, a carbon fiber heating body, a temperature limiter and a carbon fiber and metal lead connecting joint; the temperature control switch is respectively connected with carbon fiber and metal lead connecting joints on a plurality of heating modules through electric leads; and heat insulation filling layers are arranged among the plurality of heating modules. The system realizes progressive control, and can be separately controlled; the system is electrified for heating when used in a small area, so that the defect of heating when a user does not need heat is overcome, and energy loss is greatly reduced; and the heat loss is furthest reduced by using a heat insulation layer material. The heating modules are made of carbon fiber heating materials, so the conversion efficiency is greatly improved and the temperature is increased quickly; and because the superconducting heat cushion layer is arranged on the upper surface, the heat is quickly transferred, and the heat loss of a product is reduced.

The invention discloses a selective catalytic reduction (SCR) system with an external mixing nozzle metering structure. The system comprises a urea tank used for storing reducing agent, a urea pump, a metering valve, a nozzle and an air source. The metering valve is communicated with a urea pump pipeline, the air resource is communicated with a nozzle pipeline, the metering valve is arranged on the nozzle, and air flow in the air source and the reducing agent sprayed by the metering valve are mixed in the nozzle. The nozzle comprises a urea pipe, an air cap and an air flow gap formed between the urea pipe and the air cap. The SCR system with the external mixing nozzle metering structure has the advantages that an integration level is high, the external mixing type nozzle structure is simple, an atomization mixing effect is good, and the whole system is convenient to control.

The invention discloses a smart fire scene escaping system and evacuating method for large-scale exhibition halls. The system comprises a monitoring system for obtaining the onsite information of a fire scene; a handheld terminal and a sound-and-light indication device for guiding the escape of people; and a control terminal for receiving the data from the monitoring system and issuing escape routes to the handheld terminal. The monitoring system comprises M fire detectors, N infrared cameras, and L audio frequency acquisition cards. The handheld terminal comprises a processor pre-stored with the emergency channel map for the large-scale exhibition hall. The I / O disconnection interface of the processor is electrically connected with a positioning chip. The sound-and-light indication device comprises a sound-and-light alarming device and an audio player. Each door of the emergency channel is provided with at least one sound-and-light alarming device and one audio player. Each sound-and-light alarming device and each audio player are provided with a wireless communication module respectively. The processor is provided with a wireless communication module and a display module. The control terminal comprises a main controller and a standby controller.

Provided are an actuator controller based on a communication bus and a control method. The actuator controller comprises a main control module, a display and operation module, and an AC / DC power supply module. The output ends of the AC / DC power supply module are respectively connected with the main control module and the display and operation module. The main control module is connected with the display and operation module. The main control module is further connected with a controlled system and a measurement and control system. According to the invention, a bus module and a bus processing circuit are arranged, and the adoption of the bus mode is conducive to signal sharing, lower circuit complexity and higher reliability. As a drive and diagnosis circuit is arranged, the need for fault detection under the condition of frequent plug and pull can be satisfied, and quick locating and fault solving are facilitated. Through actuator controller strategy optimization, function expansion can be realized, and the difficulty in secondary development of the measurement and control system can be reduced. The control method of the invention is simple, and easy to operate and implement.

The invention discloses a motor control circuit of a garbage processor and an operation control method. The method comprises the steps as follows: a motor of the garbage processor is started and begins to run in a forward rotation direction; a forward and reverse rotation control module and a starting module receive a signal that the motor is in an idle state again, the starting module controls the motor to be started, and meanwhile, the forward and reverse rotation control module controls the motor to change an original rotation direction; the forward and reverse rotation control module and the starting module receive the signal that the motor is in the idle state again, the starting module controls the motor to be started, and meanwhile, the forward and reverse rotation control module controls the motor to change the rotation direction again; and a current monitoring module monitors current of the motor in real time and compares the current with a current threshold as follows: if the real-time current is greater than the current threshold, an activation signal is sent out to an unblocking module and the unblocking module is activated to unblock the motor, so that the motor normally works. By the method disclosed by the invention, the rotation direction can be changed when the motor is blocked, automatic unblocking can be carried out and the motor is prevented from being easily burnt out.

The invention provides a wiggler capable of swinging in the shape of U, which comprises a motor, a clamping mechanism and a driving device, wherein the driving device comprises a first swing gear, a second swing gear, a swing eccentric wheel, a swing ring, a first swing rod, a second swing rod, a third swing rod, a rotating gear, a first linear bearing, a first slide block, a slide block connecting plate, a second linear bearing and a second slide block, wherein the first slide block and the second slide block can be respectively and glidingly arranged on the first linear bearing and the second linear bearing back and forth; the slide block connecting plate is fixed on the first slide block; the second linear bearing is arranged on the upper surface of the slide block connecting plate; and the clamping mechanism is fixed on the second slide block. Therefore, a gun clamping mechanism can swing in the shape of U. When the gun clamping mechanism is used for U-shaped welding and cutting, the mechanism is convenient to operate, the efficiency is higher, and the welding and cutting quality effect is better. Because the motor which rotates in one direction does not rotate clockwise and anticlockwise as the motor of a traditional wiggler, the wiggler capable of swinging in the shape of U is not easy to burn, has a longer service life and is more durable.

The invention discloses a screw conveyor which comprises a framework, a driving mechanism, a conveying drum, a screw shaft, a screw, a head transmission bearing box and a tail transmission bearing box. The conveying drum is supported by the framework, a material access port is formed in the conveying drum, the driving mechanism drives the screw in the conveying drum, a flange support is arranged at an end of the conveying drum, the screw shaft of the screw is supported by the flange support, and the head transmission bearing box and the tail transmission bearing box are respectively positioned on the outer portions of two ends of the screw. The screw conveyor has the advantages that the screw shaft is supported by the flange support, so that the coaxiality of the screw shaft can be guaranteed, and the screw shaft can be prevented from being abraded by the wall of the conveying drum; the head transmission bearing box and the tail transmission bearing box are separated from a shell, so that bearings in the bearing boxes can keep away from materials such as dust and are positioned in lubricated environments for a long time, the service lives of the bearings can be prolonged, a motor cannot be burned out easily, the maintenance frequency can be reduced, and the production efficiency can be improved.

The present invention relates to an amphibious high-effective self-sucking centrifugal pump, belonging to the field of centrifugal pump technology. The motor outer shell is made into the form of hollow thin shell, on the volute casing of blade wheel is cut an air self-purging channel, and on the volute casing of blade wheel a gas-water separator is mounted. Said blade wheel possesses three-stage blade, and in the gas-water separator an automatic valve is mounted, said automatic valve has a valve cover with plunger type valve core and a valve seat with conical surface. Said invention also provides the working principle of the invented amphibious high-effective self-sucking centrifugal pump and its operation method.

The invention discloses a programmable gate array testing board and a programmable gate array testing system for liquid crystal display. The programmable gate array testing board is a liquid crystal display testing system matched with a programmable gate array on the basis of an ARM (Advanced RISC Machine) kernel; the programmable gate array testing board comprises a PCB (printed circuit board) testing board and a liquid crystal display mainboard installation position formed on the PCB testing board; the PCB testing board is matched with a programmable gate array matching chip and an ARM kernel chip, each input pin of the programmable gate array matching chip is connected with the ARM kernel chip, and each output pin of the programmable gate array matching chip is connected with the liquid crystal display mainboard installation position by virtue of a circuit; in addition, a short-circuit isolating circuit is arranged between the programmable gate array matching chip and the liquid crystal display mainboard installation position. The programmable gate array testing system comprises the programmable gate array testing board and a liquid crystal display module. According to the invention, the cost is low, the testing efficiency is high, the use is convenient, the compatibility is strong, and the test is safe and reliable.

The invention discloses a laser-etched pump light stripper and a manufacturing method thereof. The stripper comprises a fiber core and a fiber cladding, wherein the fiber core is wrapped by the fibercladding, and a plurality of grooves are formed on the outer surface of the fiber cladding. The manufacturing method comprises the following steps: setting a convex lens at the focusing position of the laser; focusing the laser beam on the fiber cladding through the convex lens, and etching a groove in the fiber cladding; moving the convex lens away from the focusing position, and moving the fibercladding to the next groove etching position; repeating the above two steps to etch a plurality of grooves in the fiber cladding. According to the invention, the plurality of grooves is arranged on the outer surface of the fiber cladding to form an attenuation area, so that pump light and some high-order mode stray light in the fiber cladding are stripped, and the quality of a laser beam is improved. In addition, the stripped light energy can be converted into heat energy to be taken away, so that the problem of over high temperature of the stripper is effectively solved, and the pump light stripper with good cladding light filtering effect that is unlikely to be burnt out is provided.

The invention discloses a multi-return-stroke heat-exchanging type biomass boiler. The biomass boiler comprises a boiler body and an air blowing and inducing system, and is characterized in that the boiler body comprises a feeder, a double-combustion-chamber mechanism, a multi-return-stroke densely distributed water pipe boiler furnace, a smoke exhausting pipe, a water tank arranged outside the double-combustion-chamber mechanism and the boiler furnace, and a thermal insulation layer arranged on the exterior of the water tank. The inlet of the double-combustion-chamber mechanism is connected with the feeder and an air blower, and the outlet of the double-combustion-chamber mechanism is connected with the inlet of the boiler furnace. The outlet of the boiler furnace is connected with the smoke exhausting pipe and an induced draft fan. The multi-return-stoke heat-exchanging type biomass boiler is high in heat efficiency, safe, reliable, convenient to install and small in occupied area.

The invention discloses a loudspeaker reliability test device comprising a machine box which is internally provided with a computer system. The computer system is provided with a LabView processing module and an audio card. The loudspeaker reliability test device also comprises a test card which is arranged in the machine box and connected with the computer system. The test card is provided with multipath of test channels which are formed by audio power amplifier chips, sampling resistors and loudspeaker connecting terminals in a series-connection way. The input end of each audio power amplifier chip is connected with the output end of the audio card. The test card is also provided with a voltage and current acquisition module and a single-chip microcomputer. Two ends of each sampling resistor and each loudspeaker connecting terminal are connected with the input end of the voltage and current acquisition module. The output end of the voltage and current acquisition module is connected with an I / O of the single-chip microcomputer. The I / O of the single-chip microcomputer is also connected with a mute pin of each audio power amplifier chip. A serial port of the single-chip microcomputer is connected with the computer system. The loudspeaker reliability test device is concise in structure, convenient to operate and maintain, stable and reliable and long in the service life.

Disclosed is a banknote counting machine. A first driving motor and a second driving motor are respectively arranged on the left side and the right side of the banknote counting machine, wherein the first driving motor is used for driving high-speed shaft components via a first motor belt pulley, a first motor belt and a single belt pulley all positioned on the left side face of a frame; the second driving motor is used for driving banknote twisting shaft components via a second motor belt pulley, a second motor belt and a banknote twisting belt pulley all positioned on the right side face of the frame; dual belt pulleys are fixedly connected to the left sides of the high-speed shaft components; the banknote twisting shaft components are provided with one-way banknote twisting belt pulleys via one-way bearings; the one-way banknote twisting belt pulleys are positioned between the right side face of the frame and the banknote twisting belt pulley; the one-way banknote twisting belt pulleys are connected with inner pulleys of the dual belt pulleys via driving belts; outer pulleys of the dual belt pulleys are connected with a driving belt pulley group via the driving belts; and the driving belt pulley group is connected with banknote output belt pulley groups via the driving belts. In the invention, owing to the two driving motors, the banknote counting machine can work more stably and has longer service life.

The invention discloses an engine tail gas treatment system and treatment method. The treatment system comprises an exhausting pipeline, a particle filter arranged on an exhausting path of the exhausting pipeline, a preceding stage treater located on the upstream of the particle filter, and a post stage treater located on the downstream of the particle filter. The treatment system is further provided with a waste gas branch. One end of the waste gas branch communicates with the portion, located on the upstream of the preceding stage treater, of the exhausting pipeline. The other end of the waste gas branch communicates with the portion, between the preceding stage treater and the particle filter, of the exhausting pipeline. The waste gas branch is provided with a bypass valve. According tothe system, in the driving regeneration process of the particle filter, the situation that due to the fact that the local temperature is too high, a carrier of the particle filter is burnt out easilyis avoided, and thus the service life of the particle filter is prolonged greatly.

The invention relates to a brake block for automobiles, in particular to a powder metallurgy brake block and its producing method. The brake block uses the following formula: copper 3-7%, graphite 11-15%, graphite graininess 11-15%, molybdenum disulfide 2-4%, lead oxide 3-5%, Al2O3 1-2%, brenstone 0-0.8%, Fe (base) 64-78%. Wherein, the middle coarse crystal in the graphite is -50 mesh and -80 mesh in 1:1, middle and fine crystal in the graphite is -50 mesh and -80 mesh and -200 mesh in 9:9:2. Better formula for the invention is: copper 3%, graphite 11%, graphite graininess 11%, molybdenum disulfide 2%, lead oxide 3%, Al2O3 1%, no brenstone and Fe 69%. The making method for the invention is: 1. mixing; 2. mold pressing; 3. sintering. The invention is safe, of long service life, resistant to wear, and is of good economy efficiency.

The invention discloses a voltage-multiplying-type high-voltage rectifying oil tank, which comprises an oil tank body, a tank cover, a high-frequency and high-voltage transformer, a filament transformer, a voltage sampling circuit, a positive end voltage multiplying and rectifying circuit and a negative end voltage multiplying and rectifying circuit, wherein the tank cover is arranged above the oil tank body and seals the oil tank body; the high-frequency and high-voltage transformer is fixedly arranged on a support below the tank cover; the filament transformer is fixedly arranged on the support below the tank cover; the voltage sampling circuit is arranged on an epoxy board and the epoxy board is fixedly connected with the support; and the positive end voltage multiplying and rectifying circuit and the negative end voltage multiplying and rectifying circuit are fixedly installed at the bottom of the tank cover with the support, and high-voltage filter capacitors are arranged in the positive end voltage multiplying and rectifying circuit and the negative end voltage multiplying and rectifying circuit. A sealing ring is arranged at the connected position of the oil tank body and the tank body in a surrounding way, an insulating plate is installed on the inner walls of the oil tank body and the entire support is isolated from the oil tank body; and a positive high-voltage socket and a negative high-voltage socket which are respectively used for outputting voltage to two bulb tubes are arranged on the top panel of the tank cover. The oil tank is used as a part of a high-frequency and high-voltage generator and is a link for high-voltage generation, the output high-voltage ripples of the oil tank are low and the quality of X-rays emitted by the bulb tubes is improved.

The invention discloses a current sensor, which comprises a current sampling wireless emission system (10) and a wireless receiving displaying communication system (20), wherein the systems (10, 20) are connected wirelessly, the system (10) comprises serially connected an input unit (11), a single-chip computer system (15) and a data wireless emitter (16), the input unit (11) uses a nanometer magnetic tunnel magnetic sensor (12) to sample signal. The invention has accurate measurement, high safety and reliability, wide application and strong adaptability, which is suitable for the application in high-voltage large-current condition. The invention has compact structure, low weight, low cost, easy installment and maintenance, which is suitable for network measurement and can meet the demands of modern electric power system as intelligentization, modularization, datamation, maintenance-free, miniaturization and multifunction.

The invention relates to a feeding system of a biomass boiler, and in particular to a boiler distributor not prone to burning-out. A feeding opening in the upper end of the distributor is connected with a discharging opening of a spiral feeding machine. A discharging opening in the lower end of the distributor is formed above a fire grate of a boiler. The periphery of the distributor is wrapped with a ring of protection cover. A cavity is formed between the protection cover and the distributor. The protection cover is provided with a cooling fan tube seat which is used for being connected with a cooling fan. According to the technical scheme, the periphery of the distributor is provided with the protection cover, and the distributor can be separated from a boiler front panel; the cavity is formed between the protection cover and the distributor, and cooling air is blown into the cavity through the cooling fan, so that it is avoided that high temperature of the front panel radiates the distributor, and the situation that the overall attractiveness of the boiler is affected due to the fact that paint of the distributor falls off is prevented; and the service life of the distributor is prolonged.

The invention discloses an LED street lamp and an LED street lamp display system; the LED street lamp comprises a lamp shell and a lamp holder which are fixedly connected; the lamp shell is provided with a radiating device, the lamp holder is provided with at least one group of LED units, and any one LED unit comprises a package body and at least two LED film chips which are mutually stacked; at least two pairs of P-N junctions are arranged in each LED film chip, and each pair of P-N junctions comprise an interface; all the interfaces are mutually connected or stacked; the lamp holder also comprises a metal alloy PCB, and all groups of LED units are arranged on the metal alloy PCB; the lamp shell is provided with a light outlet which is used for emitting the light given off by all groups of LED units outside; in addition, transparent silicone layers are arranged between the light outlet and all the LED units; and the LED street lamp display system comprises at least two LED street lamps and a control device. The LED street lamp has the advantages of high brightness, low loss and concentrated illumination.

The invention discloses a capillary component for an air conditioner, wherein circles of capillaries are directly bundled through a fixator; each two adjacent circles of capillaries are not contacted with each other; the fixator comprises a main body and an end cover; separators the number of which is as same as the number of the circles of capillaries, are arranged in the middle of the main body; two ends of the main body are respectively provided with a blocking slot; two ends of the end cover are provided with a blocking button; and the blocking button is pushed into the blocking slot through stress so as to fix the end cover on the main body. Through the capillary fixator, the adjacent capillaries can be separated well. The structure is simple and practical. The main body and the end cover of the fixator are fixed through an injection elastic force, are easily mounted and detached, and are reusable. The fixator can be mounted along any position of the capillary, is away from a welding port and is prevented from being easily burnt out, is easily mounted and detached, and is reusable.

The invention discloses a basalt fiber composite containing epoxy resin. The composite includes epoxy resin, basalt fibers, flame retardant polyester fibers, high-strength glass fibers, alumina, a curing agent and a coupling agent. The adopted basalt fibers, the flame retardant polyester fibers and the high-strength glass fibers are good in flame retardant effect and high in temperature resistance. In the high-temperature environment, the composite is not easy to combust meanwhile has the characteristics of acid resistance and alkali resistance, so that the composite can be used in the environment of low temperature, high temperature, strong acid, strong alkali and the like and the application range is wide.

The invention relates to a double-bed double-tube high-frequency high-voltage oil tank for providing a steady high-voltage direct-current power supply for X-ray medical equipment and the like. A bracket is fixedly arranged below a tank cap of the oil tank; a high-frequency high-voltage transformer is arranged on a bottom plate of the bracket; filament transformers are arranged on the side wall ofthe bracket; a voltage sampling module and a rectifying silicon stack are arranged on an epoxy resin board fixed with the bracket; a high-voltage power switching valve is arranged on the tank cap; the inner wall of the tank body is provided with an insulation board; the whole bracket is isolated from the tank body; and two pair of positive and negative high-voltage sockets, an oil-filled hole seal head, a short connecting pillar, two aviation sockets and a voltage input end are arranged on the face board on the top of the tank cap. As the parts of the oil tank have a compact structure, the positive and negative high voltages are separated to the greatest extent on the space layout, so that the size of the oil tank is effectively reduced and the firing of the positive and negative high voltages is avoided at the same time and the problems that the oil tank is easy to fire, the output high-frequency high voltage is unstable, the ripple wave is large and the size is too large are solved.The double-bed double-tube high-frequency high-pressure oil tank has very high security and stability.

The invention relates to the field of internet of vehicles and intelligent driving, in particular to a vehicle-to-vehicle communication system based on an LED vehicle lamp. The vehicle-to-vehicle communication system comprises a CAN transceiver, a controller, an LED driver, the LED vehicle lamp, an optical receiver and a photoelectric converter. The CAN transceiver of a vehicle at the transmittingend resolves the vehicle speed, braking and steering information of a CAN message, the vehicle speed, braking and steering information of the CAN message is sent to the controller to be encoded to bea message, and the message controls the LED driver to drive the LED vehicle lamp to flicker through high and low levels; and the photoelectric converter of the vehicle at the receiving end converts an optical signal received by the optical receiver and including the vehicle speed, braking and steering information of the vehicle at the transmitting end to a level signal, the controller decodes thelevel signal, and the vehicle speed, braking and steering information of the vehicle are resolved, and then packed to be a CAN message to be sent to a vehicle body CAN bus of the vehicle at the receiving end through the CAN transceiver. According to the vehicle-to-vehicle communication system, vehicle-to-vehicle two-way transmission of a running state of the vehicle through the optical signal isachieved, data is accurate, and the practicability is high.

The invention discloses an energy-saving constant-temperature power distribution cabinet. The cabinet comprises a cabinet body and an industrial air conditioner, wherein the cabinet body consists of a top plate, a bottom plate and side plates, a cabinet door is arranged on the cabinet body and connected onto the cabinet body through hinges, outer sides of the cabinet body and the cabinet door are coated with heat-insulation layers, flocked layers are arranged on inner walls of the cabinet body and the cabinet door, and a sealing gasket is arranged in a position where the cabinet door and the cabinet body are attached to each other and is formed by splicing multiple sections of silica gel adopting rectangular structures; a drain type power distribution cabinet dehumidifier, a digital temperature and humidity monitor and LED lamps are arranged in the cabinet body, and the industrial air conditioner is arranged behind an outer case of the cabinet body. The cabinet cannot break down and even be burnt down easily, is high in safety performance and simple in structure and is not required to be replaced frequently, the production cost is reduced, structures of existing power distribution cabinets are changed, defects of the existing power distribution cabinets are overcome, and normal and safe operation of electrical equipment in the power distribution cabinet is guaranteed.

The invention provides a transformer for induction hardening. A casing of the transformer is a cylindrical copper casing, a circular primary coil is arranged in the casing, both ends of the casing are respectively connected with a first copper cover plate and a second copper cover plate, the first copper cover plate is provided with a water joint, the first copper cover plate and the second copper cover plate are connected together by a center mandrel, the center mandrel is connected with the second copper cover plate in an insulation way, the second copper cover plate and the center mandrel are respectively and conductively connected with two input electrodes, the casing, the first copper cover plate, the center mandrel, the second copper cover plate and the two input electrodes form a secondary coil together, the primary coil is insulated from the secondary coil, the water joint is also used as a cable input end of the primary coil, and an integral cavity of the casing is a cooling chamber. The transformer has the advantages that the primary coil and the secondary coil are arranged in a circular surrounding way, the integral transformer is cooled by feeding water to the interior of the transformer, the size of the transformer is small, the required installation space is small, the cooling effect is good, impurities accumulated in the transformer can be easily cleaned, and the service life is long.