80results about How to "Avoid high temperature" patented technology

The invention relates to the field of billet sectioning, in particular to a billet sectioning device for steel pipe manufacturing and a using method.The billet sectioning device comprises a base, a billet conveying support is fixedly connected to the left side of the top of the base, an annular support is slidably connected to the middle of the top of the base, and a positioning support is slidably connected to the right side of the top of the base; a cutting mechanism is movably connected to the surface of the annular support, and an adjusting mechanism matched with the cutting mechanism is movably connected between the surface of the positioning support and the annular support. The steel billet sectioning device for steel tube manufacturing is composed of the cutting mechanism and the adjusting mechanism, after a steel tube billet on a steel billet conveying support penetrates through the annular support to be limited to the side wall of the positioning support, under the action of the cutting mechanism, the saw disc rotates along the annular support and slowly moves towards the circle center of the steel tube billet to conduct cutting machining, and the cutting efficiency is improved. The contact area of the saw disc and the steel pipe blank in the cutting process is reduced, high temperature on the surface of the saw disc is avoided, and abrasion of the saw disc is reduced.

The invention relates to the field of pharmaceutical preparations, in particular to water-free swallowing granules and a preparation method thereof. The water-free swallowing granules provided by the invention comprise drug-containing taste-masking granules and a taste-modifying material, and the drug-containing taste-masking granules are prepared from drug-containing pellets and the taste-masking material; the raw material of the drug-containing pellet comprises an adhesive, and the adhesive is selected from one or more of povidone, hydroxypropyl methylcellulose, methylcellulose, hydroxypropyl cellulose or starch slurry; the weight ratio of the drug-containing pellet to the taste masking material is (2-10): 1; the taste masking material comprises a coating component and an anti-sticking agent, wherein the coating component is selected from one or more of ethyl cellulose, cellulose acetate, cellulose acetate phthalate, cellulose acetate butyrate, hydroxypropyl methyl cellulose phthalate and carboxymethyl ethyl cellulose; the anti-sticking agent is selected from one or two of lauryl sodium sulfate and talcum powder, and the obtained water-free swallowing granules are easy to swallow and good in stability.

The invention discloses a surface mechanical alloying coated zinc carbonyl iron powder absorbent and a preparation method thereof, a ball-milling mechanical alloying process is adopted, and a uniform and compact zinc coating layer is generated on the surface of carbonyl iron powder to serve as the absorbent of an electromagnetic wave absorbing material. Compared with a traditional chemical zinc plating method, the method has the advantages that the thickness and uniformity of a plating layer can be more accurately controlled, high bonding strength between the zinc plating layer and a carbonyl iron powder matrix is achieved, highly-uniform zinc layer coverage is achieved by adjusting ball milling parameters, excellent cathode protection is provided by using high electronegativity of zinc, and the service life of the carbonyl iron powder is prolonged. The corrosion resistance of the carbonyl iron powder in a high-salinity environment is remarkably enhanced, and meanwhile, the influence on the electromagnetic wave absorption characteristic of the carbonyl iron powder is minimized. The method is simple in technological process and low in cost, the problem that the seawater corrosion resistance of a traditional method is insufficient is solved, the electromagnetic wave absorption efficiency is improved, and a novel electromagnetic wave absorption material solution with economical efficiency and high performance is provided.

The invention belongs to the technical field of electric power engineering, and particularly relates to a cable pay-off device and a working method thereof. The cable pay-off device comprises a base, a vertical plate, a rotating motor, a rotating rod, a bearing seat body, a pay-off barrel, a cable body, a steel wire rope body, a blowing heat dissipation mechanism, a pay-off auxiliary mechanism and the like. The blowing heat dissipation mechanism conducts heat dissipation on a rotating motor and a rotating rod through a rotating fan, and meanwhile the heat dissipation effect is improved by combining a water tank and a heat conduction strip. The paying-off auxiliary mechanism conducts guiding and auxiliary paying-off on the steel wire rope through an auxiliary roller, a belt and other devices, and lubricating is conducted through the lubricating mechanism. The cable pay-off device is compact in structure and comprehensive in function, the cable pay-off efficiency and stability are improved, and the cable pay-off device is suitable for the pay-off requirements of cables of different specifications and types.

The invention relates to the technical field of battery heat management, in particular to a solid-state battery pack heat dissipation structure which comprises a shell and a heat dissipation pipe, and a solid-state battery pack is inserted into the shell; the heat dissipation pipes are of a wave-shaped structure and are inserted between the adjacent rows of battery cells in parallel; each heat dissipation pipe is provided with a plurality of fixed pipe sections and rotating pipe section groups which are alternately arranged along the extension direction of the heat dissipation pipe, each rotating pipe section group comprises a rotating pipe section which can rotate, and the fixed pipe sections and the rotating pipe section groups of the adjacent heat dissipation pipes are correspondingly arranged and are respectively clamped on two sides of the same battery cell; the first end of the heat dissipation pipe can receive cooling liquid from the outside, and the second end of the heat dissipation pipe can discharge the cooling liquid, so that heat generated by the battery cell is absorbed through the cooling liquid. And when any battery cell is damaged, the damaged battery cell can be easily taken out due to sliding friction between the battery cell and the rotating pipe section, so that the convenience in use is improved.

The utility model discloses a roll surface remanufacturing cutting device, which relates to the technical field of roll cutting, and comprises a bottom plate, the top of the bottom plate is fixedly connected with a support frame, the inner wall of the bottom plate is provided with a plurality of flow guide holes, and the outer wall of one end of the bottom plate far away from the support frame is fixedly connected with a support box. According to the roller cutting device, the rotating shaft on the motor is arranged, when a roller is cut, the motor is started firstly, when the motor is started, the rotating shaft can be driven to enable the roller to start to rotate, and the device can be supported by the fixing block clamped on the roller under the fixation of the positioning drill; the positioning drill can drive the second bearing to rotate in the stabilizing ring, the cutting block is pushed to slide in the moving groove, the front end of the cutting block is attached to the outer surface of the roller so that the cutting block can cut off the iron sheet, the multiple rotating pieces are rotated so that the fixing rod can be fixed in the fixing groove, and the cutting block can be integrally fixed. The required cutting depth can be conveniently adjusted.

The utility model relates to the technical field of smelting equipment, in particular to a belly pipe of a blast furnace air supply device. The device comprises a belly pipe, the belly pipe is composed of a bent pipe and a straight pipe, the straight pipe is provided with an oblique insertion type coal injection gun pipe opening, and the device is characterized in that the internal diameter phi 1 of the bent pipe is 270mm, the internal diameter phi 2 of the straight pipe and a bent pipe flange is 160mm, and the internal diameter phi 3 of the straight pipe is 175mm; and the angle alpha of an opening of the obliquely inserted coal injection gun on the straight pipe is 9.2 degrees. After transformation, high temperature is avoided, energy is saved, and production cost is reduced. The service life of the coal injection gun and the tuyere small sleeve is prolonged, the coal injection ratio is increased, and the pig iron cost is reduced. Labor intensity of workers is reduced, and finally long-life operation of the tuyere device is achieved. And 4, the average service life of the coal injection gun is prolonged from 10 days to more than 60 days by improving the angle of the oblique insertion type spray gun non-return hot air device on the straight pipe and the coal gun, and the average service life of the tuyere small sleeve is prolonged from 5-6 months to more than 8 months.

The invention relates to the technical field of numerically-controlled lathes, and discloses a numerically-controlled lathe for front axle steering knuckle part machining, which comprises a numerically-controlled machine tool, the surface of the numerically-controlled machine tool is slidably connected with a sealing door, the bottom of the numerically-controlled machine tool is fixedly connected with a storage rack, the surface of the storage rack is communicated with a circulating pipe, and one end, far away from the storage rack, of the circulating pipe is communicated with a nozzle; a triangular chuck is arranged in the numerical control machine tool, and a cutting device is arranged at the end, away from the triangular chuck, of the numerical control machine tool. After the front axle steering knuckle is fixed into the numerical control machine tool through the triangular chuck, the cutting device is started to cut the front axle steering knuckle, a spray head sprays cooling liquid in a storage frame to the surface of the front axle steering knuckle through a circulating pipe, and the situation that the front axle steering knuckle is high in temperature during cutting is avoided; scraps generated during cutting can fall into the storage frame and the extrusion component, the extrusion component is started to extrude the scraps, and cooling liquid in the scraps can be rapidly extruded out.

The invention discloses a preparation method of a bismuth-oxygen-sulfur two-dimensional material, which comprises the following steps: S1, preparing a precursor: carrying out first heating on Bi2S3 in a protective gas atmosphere to partially decompose the Bi2S3 to obtain the precursor; the precursor is prepared from Bi and Bi2S3; and S2, confinement growth: placing the precursor between two parallel substrates, clamping the substrates, carrying out second heating in an oxygen-containing atmosphere at the same time, carrying out an oxidation reaction on the precursor, and carrying out adsorption nucleation and growth on an oxidation product on the surfaces of the substrates to form the bismuth-oxygen-sulfur two-dimensional material. According to the preparation method, the low-melting-point precursor is obtained by pretreating Bi2S3, so that the preparation of the bismuth-oxygen-sulfur two-dimensional material at low temperature becomes possible, and the energy consumption is effectively reduced; and the bismuth-oxygen-sulfur two-dimensional material is obtained through a confinement growth method, and the obtained bismuth-oxygen-sulfur two-dimensional material has the characteristics of uniform thickness, controllable size, high yield and high quality.

The utility model discloses an automatic control alarm system for a boiler, which relates to the technical field of boilers and comprises a cabinet body, buffer mechanisms are mounted on the left inner wall and the right inner wall of the cabinet body, a circuit board is fixedly mounted between the buffer mechanisms, a plug port is arranged on the front side surface of the circuit board close to the lower side, and a control unit is arranged in the middle of the front side surface of the circuit board. An audible and visual alarm is fixedly installed on the upper surface of the cabinet body, cooling mechanisms are embedded in the middles of the left side wall and the right side wall of the cabinet body, dehumidification boxes are installed on the left side wall and the right side wall of the cabinet body close to the lower side in a threaded mode, a rubber protection ring is arranged on the lower surface of the cabinet body, and a cabinet door is hinged to the front face of the left side wall of the cabinet body. The boiler alarm cabinet has the acousto-optic alarm function, the mobile phone alarm function and the background server alarm function, workers can conveniently solve the problems of a boiler in time, the sealing and cooling functions of the cabinet body are added, internal high temperature and dust are effectively prevented from entering the boiler, the service life is prolonged, and the boiler alarm cabinet is not prone to being collided and damaged and safe to use.

The utility model discloses a hydraulic control butterfly valve with good heat dissipation performance, which belongs to the technical field of valves, and comprises a valve casing, bearings are arranged on the opposite inner walls of the valve casing, a same rotating shaft is arranged in the two bearings in a penetrating manner, the surface of the rotating shaft is fixedly connected with a valve plate, the top end of the rotating shaft is fixedly connected with a rotating plate, and the rotating plate is fixedly connected with the valve plate. The bottom of the rotating plate is fixedly connected with a sliding rod, the surface of the sliding rod is movably sleeved with a sliding barrel, the surface of the valve shell is fixedly connected with a supporting plate, and the top of the supporting plate is fixedly connected with a fixing plate. The hydraulic cylinder has the beneficial effects that the refrigerator and the cooling liquid are arranged, the cooling liquid is cooled through the refrigerator, hydraulic oil in the coil pipe is cooled through the cooling liquid, meanwhile, the hydraulic oil in the hydraulic cylinder is circulated through the oil inlet hose and the oil outlet hose, high temperature of the hydraulic oil in the hydraulic cylinder is avoided, and normal use of the hydraulic cylinder is guaranteed; the service life of the hydraulic cylinder is ensured.

A flat motor disclosed by the present invention comprises a stator assembly and a rotor assembly located at the inner side of the stator assembly, the rotor assembly comprises a rotor reel, the rotor assembly further comprises a heat dissipation fan, the heat dissipation fan is located at the axial side of the rotor reel, the heat dissipation fan comprises a mounting ring, and the mounting ring is located at the axial side of the rotor reel. One side of the mounting ring is provided with a plurality of mounting parts, the plurality of mounting parts are arranged in the circumferential direction of the rotor winding frame, the plurality of mounting parts are connected with the rotor winding frame in an inserted mode, the other side of the mounting ring is provided with a plurality of fan blades, and the plurality of fan blades are arranged in the circumferential direction of the rotor winding frame. According to the flat motor, the heat dissipation capability can be improved, so that the torque and the power of the flat motor are improved, the use requirement is met, and meanwhile, the influence on the service life of the flat motor is reduced.

The utility model discloses a TSV-based multi-chip packaging structure, which relates to the technical field of chip packaging and comprises a bottom box, a first partition plate, a second partition plate and a heat dissipation structure, the upper surface of the bottom box is fixedly connected with a cover plate, one end of the bottom box is internally provided with the first partition plate, and the other end of the bottom box is internally provided with the second partition plate. A first chip, a second chip and a third chip are arranged between the first partition plate and the second partition plate, and the sides, away from each other, of the first partition plate and the second partition plate are each provided with a set of heat dissipation structures. The first heat conduction silica gel rod, the second heat conduction silica gel rod and the third heat conduction silica gel rod are used as media to be transmitted to the heat dissipation fins, meanwhile, air enters and exits the bottom box from the heat dissipation holes in the outer surfaces of the two sides of the two ends of the bottom box, heat adsorbed by the heat dissipation fins is dissipated when the air enters and exits the bottom box, and the service life of a chip is effectively prolonged.

This invention relates to the field of organic compound preparation technology, specifically a method for preparing 11-triglycerides of carbonate via low-temperature acylation. This method uses glycerol and undecanoyl chloride as raw materials, employing a synergistic system of a "composite acid-binding agent + Lewis acid catalyst," and combines in-situ dehydration technology and a stepwise heating strategy in a dual-solvent environment to achieve efficient synthesis. The specific steps include: under nitrogen protection, dissolving glycerol in a dichloromethane-toluene dual solvent, adding a composite acid-binding agent of pyridine and N,N-diisopropylethylamine, anhydrous zinc chloride catalyst, and 4A molecular sieve for in-situ dehydration; dropwise adding undecanoyl chloride at a low temperature of 5-10°C, followed by sequential heating to 30°C for 2-3 hours and then reacting at 50°C for 12-16 hours; and post-processing using a combined process of filtration-multi-stage extraction-membrane separation-column chromatography. This invention provides mild reaction conditions, effectively suppresses side reactions, produces high-purity products, increases molar yield, and reduces solvent toxicity and purification costs.

The utility model provides an electric arc furnace energy -saving type furnace cover, including setting in the electric arc furnace furnace cover of furnace body top, the electric arc furnace furnace cover outer wall integrative extension ring, the electric arc furnace furnace cover inside start to have the water tank, extension ring outer wall fixed mounting has the water inlet pipe and the water outlet pipe respectively, the water inlet pipe and the water outlet pipe all are linked with the water tank, the electric arc furnace furnace cover top fixed mounting has L type pipe, L type pipe end is connected with the connecting pipe, the connecting pipe is away from L type pipe one end fixed connection has the wind collecting bucket, be provided with the blower mechanism on the wind collecting bucket, extension ring outer wall inserts has the U type hanger, extension ring top is provided with locking mechanism, this furnace cover can cool the cooling water flowing in the inside, make reduce the evaporation consumption of cooling water, has realized the energy -conservation, still be provided with the detachable hanger, can effectively avoid the furnace cover long time to be received on the high temperature furnace cover's lifting lug and be loose, like this has the problem of the security hidden danger when replacing the furnace cover and hoisting.

The heating module comprises a sensing body, a first tubular body, a second tubular body and an electromagnetic coil, a containing cavity for containing an aerosol generating product is formed in the sensing body, the first tubular body surrounds the periphery of the sensing body, and a closed first gas medium layer is arranged between the first tubular body and the sensing body; the second tubular body surrounds the periphery of the first tubular body, a closed second gas medium layer is arranged between the second tubular body and the first tubular body, and the electromagnetic coil surrounds the periphery of the second tubular body, so that the balance of small size, energy consumption effect and heat insulation effect of the susceptor is realized.

This utility model discloses a machining device for positioning holes in CNC machining fixtures, relating to the field of positioning hole machining technology. It includes a worktable with an adjustment component inside, and a U-shaped frame fixed to the top of the worktable. A movable plate is slidably connected to the inner wall of the U-shaped frame, and an oil spraying component is located at the top of the movable plate. The adjustment component includes a fixed seat fixed to the center of the top of the worktable. This utility model achieves positioning and fixing of the positioning hole by inserting a positioning pin into the positioning hole in the part. When the tapered shaft rises, multiple sets of ball joints compress the return spring and extend from inside the positioning pin until the end face of the ball joint abuts against the inner wall of the positioning hole in the part. This effectively adapts to changes in the diameter of the positioning hole, ensuring precise alignment between the part and the tool, thereby improving machining accuracy, enhancing the versatility and flexibility of the device, avoiding frequent replacement of positioning pins of different sizes, simplifying the operation process, and improving production efficiency.

The invention discloses a method for preparing a magnetic wrinkled graphene oxide adsorption material and application thereof. The method comprises the following steps: preparing an edge graphite oxide intercalation mixture in a vacuum environment by using a dual-electrode system; taking the obtained edge graphite oxide intercalation mixture as a working electrode, taking a platinum wire as a counter electrode, and then putting the edge graphite oxide intercalation mixture and the platinum wire into a Ba (OH) 2 solution for electrochemical oxidation and stripping to obtain graphene oxide; stirring the obtained graphene oxide dispersed in the solution, enabling Ba < 2 + > and HSO4 <-> to finally generate BaSO4 precipitate in the solution, and separating the graphene oxide through centrifugation; the preparation method comprises the following steps: ultrasonically dispersing graphite oxide in water to prepare a graphene oxide dispersion liquid, dropwise adding the graphene oxide dispersion liquid into absolute ethyl alcohol, then adding a magnetic material, stirring under the ultrasonic action, and freeze-drying the mixed solution to obtain a magnetic wrinkled graphene oxide adsorption material; the method has the advantages of greenness, simplicity, convenience and high efficiency.

This utility model discloses a circulating water device for a prebaked anode calcining furnace, comprising: a heat-conducting frame one, an outer heat-collecting cylinder fixedly connected to the inner surface of the heat-conducting frame one, a heat-conducting frame two fixedly connected to the inner surface of the outer heat-collecting cylinder, a heat-gathering ring fixedly connected to the inner surface of the heat-conducting frame two, a heat-gathering tube tightly fitted to the inner surface of the heat-gathering tube, a water outlet pipe and a superconducting heat column fixedly connected to the upper outer surface of the heat-gathering tube, a reinforcing connecting rod fixedly connected to the side surface of the water outlet pipe, a hot water pipe fixedly connected to the lower outer surface of the reinforcing connecting rod, and sealing flange one and sealing flange two fixedly connected to the outer surfaces of the hot water pipe and the water outlet pipe, respectively. Through the coordinated use of the above components, the device achieves efficient water circulation and heat recovery, while also preventing high temperature of the equipment. In addition, the device can be flexibly expanded with external equipment.

The invention discloses a quartz crystal resonator aging system, which relates to the technical field of quartz crystal resonator production equipment, and comprises an aging box and a control box arranged on one side of the aging box, wherein an aging chamber is arranged in the aging box, and an air blowing unit and a heating unit are arranged in the aging box, which are used to input hot air into the aging chamber, and an air inlet channel and an air return channel are arranged on the left and right sides of the aging chamber, respectively, and the system further comprises an air collecting component, a partition component and a placement component; the invention divides the aging chamber into a plurality of independent chambers through the arrangement of the air collecting component, the partition component, the placement component and the shock absorbing component, and adjusts the form of the side air outlet, so that the temperature of the quartz crystal resonator on each sample tray is more uniform without moving the sample tray, thereby avoiding the problem that the temperature of the quartz crystal resonator near the air outlet is higher.

The utility model relates to the technical field of plastic production equipment, in particular to a modified plastic master batch production device which comprises a device body, a first heat dissipation device, a second heat dissipation device, a heat dissipation base, a copper plate base, a heat dissipation plate, a micro fan and a heat dissipation plate through hole. The heat dissipation plate is installed at the bottom of the copper plate base, the heat dissipation plate through holes are formed in the heat dissipation plate, air of the device body is driven to flow through a micro fan, and therefore heat dissipation is conducted on the heat dissipation base, the copper plate base and the heat dissipation plate, and the temperature generated in the plastic processing and producing process of the device body is reduced; therefore, high temperature generated in the operation process of the production device can be avoided, and plastic raw materials can be thermally degraded by the high temperature.

The invention relates to the technical field of axle quenching, and discloses an axle connecting surface local quenching machining device and process, and the axle connecting surface local quenching machining device comprises a water tank, a mounting groove is formed in the upper portion of the right side of the water tank, a square groove is formed in the upper portion of the left side of the water tank, and a clamping mechanism is arranged on the upper portion of the right side of the water tank; a cooling mechanism is arranged on the upper portion of the left side of the water tank, the clamping mechanism comprises a sliding seat, the lower side of the sliding seat is slidably connected with the inner wall of the mounting groove, the sliding seat can slide towards one side of the cooling mechanism, and the cooling mechanism comprises a fixing assembly, a rotating mechanism and a moving mechanism. And the plane of the connecting surface faces the left side, so that steam generated by quenching can be quickly converged to the middle of the left side of the axle after airflow passes through the right semicircular surface, the influence of the steam on a high-temperature main body structure at the right part of the axle connecting surface is avoided, and the device has the characteristics of high practicability and capability of reducing the influence on an axle main body when the axle connecting surface is quenched.

The application discloses a composite connecting layer, a multi-junction laminated solar cell and a preparation method thereof. X The Au nano-particle conductive layer has a light transmittance of more than 90% and a thickness of 5-20 nm; the PEDOT:PSS interface buffer layer has a thickness of 20-60 nm; and the MoO X The energy level matching layer has a thickness of 5-15 nm. X The three-layer stacking design of the Au metal nano-particle / PEDOT:PSS / MoO The complementary functions and synergistic effect of the three materials effectively solve the problems of the traditional connecting layer in conductivity, interface morphology and energy level matching.

The anti-overheating device for the automobile repair part surface decoration machining robot comprises the machining robot, and a fixing plate is fixedly connected to the bottom of the machining robot. The cooling assembly is adsorbed to the surface of the machining robot through the magnetic block, meanwhile, the refrigeration assembly is started, the temperature guide block is cooled through the refrigeration piece, the interior of the water tank is cooled through the temperature guide block, meanwhile, the cooling fan is started to cool the cooling block, and the cooling block conducts heat dissipation on the right side of the refrigeration piece; and meanwhile, a submersible pump is started, water is supplied to a water supply box through the submersible pump, then water is conveyed into a copper pipe through a connector, then the copper pipe cools a copper block, the machining robot is cooled through a temperature conduction piece, and the functionality of the machining robot can be guaranteed. And an existing mode that heat dissipation is not carried out on the machining robot is replaced, and therefore heat dissipation can be conveniently carried out on the machining robot.

The invention discloses composite foam as well as a preparation method and application thereof. The structure of the composite foam comprises a metal material which is selected from a metal simple substance or a metal alloy; the hollow glass microspheres and the reinforcing filler are dispersed in the metal material; wherein all the hollow glass microspheres are embedded in the metal material. In the composite foam, a composite cavity is formed by using the preformed hollow glass microspheres and stacking gaps among the microspheres, so that the density of the composite foam is reduced, and the strength and functionality of the composite foam are also ensured; connection enhancement of the preformed hollow microspheres is synchronously achieved through the metal material deposition process, and the process is convenient and efficient through connection of the reinforcing filler and the hollow microspheres.

The utility model discloses an iron lithium battery pack shell with good corrosion resistance and water resistance, which comprises a battery shell, a clamping groove is arranged at the top end of the battery shell, a protective cover is clamped on the inner wall of the clamping groove, and the protective cover is fixedly connected with the battery shell through two groups of mounting screws. According to the device, through the arrangement of the supporting seat, the battery lower chuck, the battery upper chuck, the ventilation cavity and the annular exhaust hole, single batteries which are connected in series can be arranged and assembled in a suspended manner, the ventilation quantity in the battery shell can be increased, the interior of the battery shell can be conveniently kept dry, high temperature of the lithium battery is avoided, the aging speed of materials in the battery is reduced, and the service life of the battery is prolonged. Through cooperation of a ceramic material and a PP plastic material, the anti-corrosion effect of the battery shell is effectively improved, the service life of the battery shell is prolonged, through arrangement of a protective cover, mounting screws, a clamping groove and a sealing gasket, the top of the battery shell can be sealed, and moisture prevention of the battery shell is facilitated.

The utility model relates to a plate type gas -gas heat exchanger, including mounting panel, display screen, fixed bolt, cooling liquid pipe, air pipe, sealed shell, fixed plate, heat conduction device, through having set up heat conduction device, through the installation component to the fixed support of condensing pipeline, guarantee cooling nozzle can spray out cooling mist to the auxiliary constant temperature function of heat conduction fin, and through having set up the whole of the heat conduction grain of different orientation of multiple sets of heat conduction fin to guide heat storage or transmission, to guide heat flow in the inside of heat conduction fin, make heat conduction fin can release the hot gas of appropriate to the auxiliary constant temperature function of electrical equipment, and then reach through the process of guiding cold and hot medium to exchange each other in heat conduction device, avoid the equipment cooling equipment to keep the state of high temperature continuously, and then solve the problem that the heat exchange pipe in traditional equipment is deformed by thermal expansion.

The invention relates to a method for removing a perfluoropolyether acyl fluoride end group. The method comprises the following steps: adding perfluoropolyether acyl fluoride, a fluorinating agent, a catalyst and a solvent into a photochemical reactor, reacting for 2-12 hours under the conditions of normal temperature and normal pressure and ultraviolet irradiation, and removing acyl fluoride end groups to obtain perfluoropolyether which can be used as perfluoropolyether vacuum pump oil, the fluorinating agent is a fluorine-containing aromatic compound. The method has the advantages of simple operation steps, easy realization of reaction equipment, mild reaction conditions, avoiding of decomposition loss of the perfluoropolyether product due to high temperature, safety and energy saving.

The application provides a non-invasive aero-engine state monitoring system and an implementation method.The whole system comprises an electric field sensor, an exhaust gas electric field sensing device, a signal acquisition device and a computer.The electric field sensor is carried on the exhaust gas electric field sensing device to obtain the electric quantity of the exhaust gas, and the measured data is sent to the computer through the signal acquisition device, and the signal processing, analysis and display are completed in the computer.The aero-engine state sensing adopts the mode of measuring the electric field value around the electrically charged particles in the exhaust gas, the analysis mode adopts a total charge amount estimation method in a closed space based on Gauss theorem, the charge amount of the electrically charged particles in the exhaust gas is estimated based on the measured electric field, the corresponding relationship between the exhaust gas charge amount and the working state of the aero-engine is obtained by using a data mining technology, and thus the monitoring of the working state of the aero-engine is realized, and the system has high accuracy, is easy to implement and has low cost.