34results about How to "Not affected by outside temperature" patented technology

The invention discloses a micro-current measuring circuit for dielectric response tests; the micro-current measuring circuit comprises a logarithm operation unit, a linear optical coupler unit, an index operation unit, and a signal secondary amplification unit connected in sequence; the logarithm operation unit comprises an ultra low bias current amplifier and a negative feedback element; the linear optical coupler unit comprises a linear optical coupler chip and a negative feedback circuit; the index operation unit comprises a high speed operation amplifier and a photosensitive diode; the micro-current measuring circuit has no feedback resistor, so the measuring result cannot be affected by a resistance temperature coefficient, thus providing high temperature drift influence inhibition ability, and the temperature coefficient can reach 100ppm / C.

The invention discloses a UPS LED ceiling lamp for realizing dimming by human body induction, comprising an AC-DC switch power supply, a DC-DC convertor, a UPS battery pack, an electronic switch, a human body induction control circuit and an LED light source. By adding the human body induction control circuit, the UPS battery pack and the electronic switch with the function of priority connection with commercial power, the UPS LED ceiling lamp can achieve dimming by human body induction; the human body induction control circuit can control output of illumination light by detecting whether pedestrians are in a lighting area; the electronic switch has the function of preferentially connecting with the commercial power and supplies power to an LED lighting source through the commercial power; and when conditions such as sudden power outage and the like occur, the UPS battery pack which is fully charged previously can be taken as the emergency power supply, thus the UPS LED ceiling lamp has the advantages of all-round functions and being convenient and practical.

The invention relates to an electromagnetic fan clutch of a vehicle, a manufacturing method of the electromagnetic fan clutch, an insert and a manufacturing method of the insert. The insert disclosed by the invention is used for the electromagnetic fan clutch comprising a bearing base and a bearing, wherein the outer surface of the insert is matched with the bearing base, the inner surface of the insert is matched with the bearing, and a clearance can be filled with the insert when the clearance between the bearing base and the bearing is changed. The manufacturing method of the insert, disclosed by the invention, comprises the following steps of: supplying raw materials of the insert; smashing the raw materials of the insert and adding a plasticiser for mixing; placing the compound into a mould for compression moulding; and placing the moulded insert into a sintering furnace for sintering. The electromagnetic fan clutch is formed by the insert disclosed by the invention. The manufacturing method of the electromagnetic fan clutch comprises the following steps of: embedding and casting the insert into the bearing base of a fan fixing plate and pressing the bearing to the inner circumference surface of the insert.

The invention discloses a biogas generator applicable to cold regions, which is mainly characterized in that: a guiding stirrer and a scrambler are arranged inside a biogas fermentation tank of a biogas pool, the guiding stirrer is located at the periphery of the biogas fermentation tank, the scrambler is located at the center of the biogas fermentation tank, the guiding stirrer and the scramblerare communicated, the guiding stirrer and the scrambler are communicated with a heat-insulation and heating controller, the heat-insulation and heating controller is connected with a gas collection tank through a gas pump, an adjusting valve and an electromagnetic valve and a shell breaking cone is located at the top of a floating cover of the biogas fermentation tank; the heat-insulation and heating controller can control the temperature of the fermented liquid, thus achieving the heat insulation and heating of the fermented liquid, protecting the fermented liquid from the outside temperature influence, reaching the optimum temperature for bacterium fermentation and facilitating the production of the biogas; and the guiding stirrer, the scrambler and the shell breaking cone utilize a gasdisturbing mode to carry out strong forced movement on the fermented liquid and reach a turbulent state, thereby destroying the crusting of plant fibers, completely decomposing the fermentation raw materials and increasing the gas production rate of the raw materials.

The invention discloses an improved rubber composite environment-friendly rubber floor and a manufacturing method. The composite environment-friendly rubber floor comprises a surface layer, a transition layer and a bottom layer in sequence from top to bottom, wherein the surface layer, the transition layer and the bottom layer are laminated together through high temperature. The surface layer is vulcanized rubber and has the advantages of good elasticity, compression deformation resistance, ageing resistance, wearing resistance, slipping resistance and the like; the bottom layer is a PVC (Polyvinyl Chloride) floor and has the advantages that the bottom layer has a firm structure, is durable, has stable performance and low price and the like; the transition layer is a mixture of plastic andrubber and can be used for effectively improving the adhering force of the surface layer and the bottom layer, is not influenced by external temperature and is not delaminated; the defect that the product environment assessment of a composite structure of an environment-friendly PVC floor and an environment-friendly rubber floor, which are adhered by adopting glue, in the current market does notreach standards is overcome; the environment-friendly rubber floor meets various environment-friendly performance indexes.

The invention discloses a new protective cover device for a pipeline and an installation method of the new protective cover device. The device is used for sleeving the pipeline (7) to play a role of heat insulation protection, and comprises a main protective part (8) taken as a larger segment part section cylinder and a cover body part (4) taken as a smaller segment part section cylinder which can be combined to form a cylinder, wherein elastic vertically-opposite platform pipe fittings (81, 41) are symmetrically arranged at the bottom of the main protective part (8) and the top of the cover body part (4), and elastic clamp components (82) are symmetrically arranged on two relative sides in the diameter direction of the main protective part (8), so that the two elastic vertically-opposite platform pipe fittings (81, 41) can clamp the pipeline (7) in the vertical direction.

The invention belongs to the technical field of pipeline construction, and relates to a bearing mechanism and construction method for an underground pipeline jacking device. The bearing mechanism comprises a jack and is characterized in that the bearing mechanism further comprises a rear back wall and a diameter adjusting mechanism; the rear back wall is of a detachable steel structure, one end ofthe jack is tightly propped against the rear back wall through the diameter adjusting mechanism, and the other end of the jack is tightly propped against a pipeline to be jacked through a tool; and the bearing mechanism further comprises an angle adjusting mechanism, one end of the angle adjusting mechanism is fixed on the diameter adjusting mechanism, and the other end of the angle adjusting mechanism is locked with the jack. The bearing mechanism provided by the invention has the advantages that the construction time is not affected, and the bearing mechanism can be repeatedly used, and isrecyclable, environmentally friendly, stable in stress, and safe and reliable; and meanwhile, the bearing mechanism can also adjust the inclination angle of the jack, the angle requirement of pipelineconstruction is met, the operation is simple, and the construction efficiency is high.

The invention discloses a television packaging box for transportation. The television packaging box comprises a box body, a plurality of supporting legs are arranged at the bottom of the box body, a sealing plate movably connected with one side of the outer wall of the box body, and a plurality of fasteners are arranged on the outer sides of opening ports, on outer walls, of the box body in a matched mode; a heat dissipation layer is arranged on the inner wall of the box body, the heat dissipation layer comprises a first liquid storage layer and a second liquid storage layer, wherein a liquidadding port and a liquid discharging port are formed in one side of the outer wall of the heat dissipation layer; a baseboard is arranged at the bottom of the inner side of the box body, a conveying frame movably connected is arranged above the baseboard inside the box body in a matched mode, and a plurality of pulleys and a first buffering piece are arranged at the bottom of the conveying frame;and supporting plates are symmetrically arranged on the two sides of the inner wall of the box body, sliding rails are symmetrically arranged on adjacent sides of the outer wall of the two supportingplates, a second buffering piece which is movably connected is arranged between the two supporting plates, and a mounting frame is arranged at the top of the second buffering piece. According to the packing box, packaging and disassembly of the television package is convenient and fast, protection capability is good, a television can be prevented from being affected by an external temperature, andthe packaging box can be recycled and reused.

The invention discloses an agricultural production waste closed aerobic sub-high-temperature microorganism fermentation seven-day fertilizer-making method and device. According to the method and device, a fermentation gas fairing is used based on a conventional fermentation tank, the fermentation tank is integrally closed, fermentation gas circulation and fresh air distribution are regularly performed by the aid of a fermentation gas circulation and air distribution system, the fermentation temperature of a fermented object in the fermentation tank reaches 50-55 DEG C within 10-20 hours undercombined action of fermentation gas circulation, fresh air distribution and fermentation preparations and cannot be affected by outside temperature, the fermented object is transferred to a discharging end from a feeding end of the fermentation tank during fermentation, sub-high-temperature closed aerobic fermentation at the fermentation temperature of 60-65 DEG C is kept (limit temperature is less than 65 DEG C), an integrated process is seven days, raw materials such as agricultural waste (animal and plant residual bodies and breeding organism manure) are sufficiently and harmlessly treatedto obtain an excellent fermented organic fertilizer or microorganism organic fertilizer.

The invention relates to a laser fiber speed measuring sensor, a switching value sensor and a measuring method. The laser fiber speed measuring sensor comprises a shell body having an accommodating space, wherein a rotating disk is arranged inside the shell body, a plurality of through holes in the same shape are evenly formed in the surface of the rotating disk along the circumferential direction, the through holes are formed at a fixed interval, the sector size of the same diameter part entity and that of the interval are completely identical at an open hole sector length part, a rotating shaft is arranged at the center of the rotating disk, and the rotating shaft extends out of the shell body and is connected with a first structure to be measured; one side of the rotating disk is provided with an optical fiber connected to a light emitting unit, an emitting end of the optical fiber and the through holes are in the same horizontal position, so that pulsed laser can completely pass through the through holes, and the tail end of the optical fiber is connected with a laser demodulator; and the other side of the rotating disk is provided with a reflection unit, and the reflection unit receives and reflects the pulsed laser passing through the through holes, so that the pulsed laser returns to the optical fiber via an original path and enters the laser demodulator.

The invention provides a vehicle-mounted swinging annular-sheet type sludge processing apparatus which is installed in a box body of a vehicle, and the box body is provided with a sewage inlet, a sewage discharge port and a material discharge port. The sludge processing apparatus is especially applicable to sewage processing of a manure pit, and comprises a pipeline crushing pump device, a screw pump device, a flocculating-agent dissolving water tank, a desilter device, a vibrating screening device, a clear-water tank, a hydraulic retractable capstan device, a diesel-oil mule generator unit, a discharge tank device, a swimming annular-sheet stack screw type solid-liquid separation machine device, a solid-liquid separation machine anti-blocking intelligent air-pushing device, a flocculation stirring mixing tank device, an air compressor device, an intelligent pneumatic type box-cleaning direct-discharge square ball valve device, a membrane filter screen type water purification filtration device and an integrated intelligent electronic control cabinet device.

The invention discloses a fully-insulated and fully-sealed solid-cabinet fuse tube. The fully-insulated and fully-sealed solid-cabinet fuse tube comprises a tube body and a connecting part, wherein a guiding component is fixedly mounted inside the inner cavity of the tube body; a plurality of guiding holes are formed in the guiding component; at least one lattice bar capable of axially moving along the guiding hole is arranged inside each guiding hole; an elastic component or an oppositely-homopolar magnetic component is further arranged inside the inner cavity of the tube body; one end of the elastic component or the magnetic component is in contact with the top of the inner cavity of the tube body, and the other end of the elastic component or the magnetic component is in contact with the lattice bar; when the fuse tube is not in use, the upper end part of the lattice bar is propped against the upper surface of the guiding component under the action of the elastic component or the oppositely-homopolar magnetic component. The fully-insulated and fully-sealed solid-cabinet fuse tube is simple in structure, low in cost, and stable and reliable in working state, saves the space, can assemble and disassemble tightening components with different specifications and cover all the tightening components, and can meet a using requirement; in an aspect of matching with other tools, through a standard interface, the fully-insulated and fully-sealed solid-cabinet fuse tube is also applicable for connecting parts of almost all the existing electric wrenches, pneumatic wrenches and manual wrenches, so that the application range of the fully-insulated and fully-sealed solid-cabinet fuse tube is widened and the adaptability of the fully-insulated and fully-sealed solid-cabinet fuse tube is improved.

The invention relates to a method for detecting the heat dissipation performance of a cable conduit. A temperature control box for detecting the heat dissipation performance of the cable conduit is arranged. The method comprises the following steps: step one, detecting a conduit segment sample; step two, fixing the conduit segment sample; step three, heating the conduit segment sample; and step four, cooling the conduit segment sample. According to the invention, the method has the following advantages: since the conduit segment sample heating and cooling are carried out in the temperature control box and the temperature control box can ensure the constant temperature inside the box, the temperature of the conduit segment sample is not affected by external factors during the heating and cooling processes, so that the accuracy of the temperature detection is improved and thus the heat dissipation performance of the conduit segment sample is obtained rapidly and the detection process issimplified. Moreover, the heat dissipation performances of conduit segment sample in different environments are simulated by setting the temperature in the temperature control box, so that the practical performance is good.

Disclosed is a constant-temperature insulation steel silo. A common steel silo is already widely used as being low in cost and fast in construction and is unsuitable for long-term storage of grain and only suitable for revolving as not having an insulation function. The constant-temperature insulation steel silo is composed of a foundation (1) and a silo body (2) connected with the foundation, an insulation layer (3) is fixed to the outer side of the silo body through connectors, a peripheral plate (4) is fixed on the insulation layer or the silo body through supports, and the insulation layer and the peripheral plate form an air heat-insulation course. The constant-temperature insulation steel silo is used as a granary for long-term grain preservation.

The invention discloses a rust-proof full wrapping-type temperature sensing sleeve for a heat exchanger. The rust-proof full wrapping-type temperature sensing sleeve comprises an upper pressing plate, a plastic hoop and a temperature measurement galvanic couple pipeline; a lower pressing plate is symmetrically arranged below the upper pressing plate; the right side of a heat conducting sheet is connected with a heat transfer block; a support is arranged in the temperature measurement galvanic couple pipeline; the support is provided with a temperature measurement galvanic couple; and heat conducting glue is connected between the temperature measurement galvanic couple and the temperature measurement galvanic couple pipeline. The rust-proof full wrapping-type temperature sensing sleeve for the heat exchanger is provided with a waterproof cover, and the waterproof cover is capable of covering an adjusting screw rod and a fixed bolt after installation is finished, so that the phenomenon that the adjusting screw rod and the fixed bolt fall off due to rusting by rain erosion is avoided; the plastic hoop can slightly deform according to the size of a copper pipe, and therefore, the temperature sensing sleeve can be suitable for copper pipes of most diameters, and does not need to be specially customized according to the sizes; the covering angle of the heat conducting glue in the temperature measurement galvanic couple pipeline is equal to the connecting angle of the heat transfer block at the outer side of the temperature measurement galvanic couple pipeline, and thus, conducted temperature can be connected with the temperature measurement galvanic couple pipeline and the internal heat conducting glue on the maximum area to accelerate temperature measurement rate.

The invention discloses a cobalt iron alloy target. The cobalt iron alloy target is used for magnetron sputtering and coating and is alloy fabricated by mixing cobalt and iron according to an atom proportion being (6.5-8.5):(3.5-1.5). The invention also discloses a magnetic conductive layer made of the cobalt iron alloy target, a magnetic capacitance unit and a magnetic capacitance device. Due tothe presence of cobalt, the cobalt iron alloy target has relatively excellent wear resistance, cutting performance and heat resistance and is used for magnetron sputtering and coating, favorable magnetism of the prepared multi-layer nanoscale thin film can be maintained by magnetization for one time, moreover, favorable magnetism also can be maintained under a high temperature, and the stored electric energy quantity of the magnetic capacitance device can be improved to be 10 <9>-10<12> from 10<4>-10<5> when the cobalt iron alloy target is used in a semiconductor magnetic energy power storagecapacitor.

The invention discloses a heavy metal detector. The detector comprises: a base; a detection mechanism which is connected to the machine base and comprises a test pool for bearing a detection solution and an electrode plate extending into the test pool; a temperature conduction metal piece which wraps the periphery of the testing pool; a temperature adjusting mechanism which is mounted on the temperature conduction metal piece to heat or refrigerate the temperature conduction metal piece; and a temperature sensor which is used for detecting the temperature of the solution in the testing pool and is connected with the temperature adjusting mechanism. The temperature sensor is used for monitoring the temperature of the testing pool in real time, and the temperature adjusting mechanism controls the temperature of the testing pool and keeps the temperature of the testing pool through the temperature conduction metal piece, so that the testing pool can be kept in a preset temperature range constantly, a solution sample in the testing pool is prevented from being influenced by external temperature, and the accuracy and precision of a detection result are greatly improved.

The invention discloses an optical fiber composite low-voltage cable, which comprises a plurality of conductors and optical units, the conductors and optical units are twisted together, the outside of the conductors and optical units is provided with a wrapping tape, and a tearing rope is embedded in the wrapping tape , the outer side of the tape is provided with an outer sheath, the outer side of the conductor is provided with an insulating sheath, the outer side of the optical unit is provided with an optical unit sheath, and the optical unit sheath includes the following materials by weight: ethylene-acetic acid 60~80 parts of vinyl ester copolymer, 10~20 parts of linear low density polyethylene, 10~20 parts of EPDM rubber, 1~2.5 parts of vinyl triethoxysilane, didodecane thiodipropionate 1~2 parts of ester, 0.5~2 parts of silicone masterbatch, 2~5 parts of lead oxide powder, 3~6 parts of ethoxylated trimethylolpropane triacrylate, N,N,N',N'‑ Tetrakis[4-(dibutylamino)phenyl]-1,4-phenylenediamine hexafluoroantimonate 1~3 parts, dibutylzinc dithiocarbamate 0.5~1.5 parts, triethylhexyl phosphoric acid 1 ~2 servings. The optical unit sheath in the optical fiber composite low-voltage cable can isolate high temperature from the outside.

The invention belongs to the field of space debris cleaning, and in particular relates to a rope net storage and release mechanism with adjustable tension and instant release. It includes a net bag, an outer cylinder, a rope, a tension adjuster, a rope cutter bracket and a rope cutter; the outer cylinder provides support for the entire mechanism and provides storage space for the net bag; the two ends of the rope are connected to the two ends of the tension adjuster to form a The closed ring binds the net bag, and the tension adjuster is used to adjust the tension on the rope; the rope cutter is arranged on the rope cutter bracket, including a blade, which drives the blade to cut the rope according to the trigger signal, and releases the net bag. The tension regulator can adjust the tension of the rope after the rope creeps to keep the tension at the desired size; in addition, the rope cutter can cut the rope immediately when the rope net needs to be launched, and loosen the rope. The fixed rope net facilitates the execution of subsequent control commands.

The invention belongs to the field of space debris cleaning, and particularly relates to a tension-adjustable instantly-released rope net storage and release mechanism. The mechanism comprises a net bag, an outer cylinder, a rope, a tension adjuster, a rope cutter support and a rope cutter. The outer cylinder supports the whole mechanism and provides a storage space for the net bag; the two ends of the rope are connected with the two ends of the tension adjuster to form a closed circular ring bundling net bag, and the tension adjuster is used for adjusting tension on the rope; the rope cutter is arranged on the rope cutter support and comprises a blade, and the blade is driven to cut off a rope and release the net bag according to a trigger signal. Aiming at the problems that the rope creeps after vibration and the tension is reduced, the tension adjuster can adjust the tension of the rope after the rope creeps, so that the tension of the rope is kept at an expected value; in addition, the rope cutter can cut off the rope immediately when the rope net needs to be launched, the fixed rope net is loosened, and execution of subsequent control instructions is facilitated.

The invention discloses a micro-current measuring circuit for dielectric response tests; the micro-current measuring circuit comprises a logarithm operation unit, a linear optical coupler unit, an index operation unit, and a signal secondary amplification unit connected in sequence; the logarithm operation unit comprises an ultra low bias current amplifier and a negative feedback element; the linear optical coupler unit comprises a linear optical coupler chip and a negative feedback circuit; the index operation unit comprises a high speed operation amplifier and a photosensitive diode; the micro-current measuring circuit has no feedback resistor, so the measuring result cannot be affected by a resistance temperature coefficient, thus providing high temperature drift influence inhibition ability, and the temperature coefficient can reach 100ppm / C.

The invention discloses a biogas generator applicable to cold regions, which is mainly characterized in that: a guiding stirrer and a scrambler are arranged inside a biogas fermentation tank of a biogas pool, the guiding stirrer is located at the periphery of the biogas fermentation tank, the scrambler is located at the center of the biogas fermentation tank, the guiding stirrer and the scramblerare communicated, the guiding stirrer and the scrambler are communicated with a heat-insulation and heating controller, the heat-insulation and heating controller is connected with a gas collection tank through a gas pump, an adjusting valve and an electromagnetic valve and a shell breaking cone is located at the top of a floating cover of the biogas fermentation tank; the heat-insulation and heating controller can control the temperature of the fermented liquid, thus achieving the heat insulation and heating of the fermented liquid, protecting the fermented liquid from the outside temperature influence, reaching the optimum temperature for bacterium fermentation and facilitating the production of the biogas; and the guiding stirrer, the scrambler and the shell breaking cone utilize a gasdisturbing mode to carry out strong forced movement on the fermented liquid and reach a turbulent state, thereby destroying the crusting of plant fibers, completely decomposing the fermentation raw materials and increasing the gas production rate of the raw materials.

The invention relates to an automatic production line for an inorganic decorative sheet. A cover mold demouding transfer line is arranged and positioned right over a bottom mold leather belt annular transfer line in the length direction, and bottom molds and cover molds are fixed on the bottom mold leather belt annular transfer line and the cover mold demouding transfer line; a semi-finished product feeding system comprises a feeding warehouse set, a spiral counting conveyor and a stirring warehouse set, which are sequentially connected; a roller brush is arranged on the bottom mold leather belt annular transfer line, an insulating hood is arranged outside the bottom mold leather belt annular transfer line and the cover mold demouding transfer line, and an antifoaming agent spray gun is arranged above a front segment of the cover mold demouding transfer line. The brush is used for continuously cleaning the bottom molds, so that production continuity is guaranteed, and a multistage semi-finished product feeding system can meet technology requirements of varied materials; the insulating hood can stabilize the production quality of products, and the production quality of the products is not influenced by outside temperature; through quantitative feeding and counting, the product stability is controlled. According to the automatic production line disclosed by the invention, the technical problems that in the prior art, the product stability in the production process of the products is poor, and the processing technology is discontinuous are solved.

The invention provides a vehicle-mounted floating ring plate type mud treatment device, which is installed in a vehicle box body, and the box body is provided with a sewage inlet, a sewage discharge port and a material discharge port. The sewage treatment device is especially suitable for the sewage treatment of septic tanks, which includes a pipe crushing pump device, a screw pump device, a flocculant dissolving water tank, a desilter device, a vibrating screen device, a clean water tank, a hydraulic retractable winch device, a diesel silent Generator set, discharge trough device, floating ring stacked screw type solid-liquid separator device, solid-liquid separator anti-blocking intelligent air push device, flocculation mixing tank device, air compressor device, intelligent pneumatic type The box cleans the straight row square ball valve device, the membrane filter screen type water purification filter device and the integrated intelligent electric control cabinet device.

The invention discloses a UPS LED ceiling lamp for realizing dimming by human body induction, comprising an AC-DC switch power supply, a DC-DC convertor, a UPS battery pack, an electronic switch, a human body induction control circuit and an LED light source. By adding the human body induction control circuit, the UPS battery pack and the electronic switch with the function of priority connection with commercial power, the UPS LED ceiling lamp can achieve dimming by human body induction; the human body induction control circuit can control output of illumination light by detecting whether pedestrians are in a lighting area; the electronic switch has the function of preferentially connecting with the commercial power and supplies power to an LED lighting source through the commercial power; and when conditions such as sudden power outage and the like occur, the UPS battery pack which is fully charged previously can be taken as the emergency power supply, thus the UPS LED ceiling lamp has the advantages of all-round functions and being convenient and practical.

The invention discloses a fully insulated and fully sealed solid cabinet fuse cylinder, which includes a cylinder body and a connecting part. A guide part is fixedly installed in the inner cavity of the cylinder body, and a plurality of guide holes are opened on the guide part. A lattice rod that can move axially along the guide hole, and an elastic component or a magnetic component opposite to the same pole is arranged in the inner cavity of the cylinder. One end of the elastic component or magnetic component is in contact with the top of the inner cavity of the cylinder, and the other end When it is in contact with the dot matrix rod, when it is not working, the upper end of the dot matrix rod is pressed against the upper surface of the guide part under the action of the elastic component or the magnetic component opposite to the same pole; this product has simple structure, low cost and stable working condition Reliable and space-saving, it covers all the disassembly and assembly of fasteners of different specifications, and can meet the requirements of use. In terms of cooperating with other tools, the standard interface can also be used for the connection of almost all existing electric wrenches, pneumatic wrenches, and manual wrenches. Department, thus improving its scope of application and adaptability.

The invention discloses a high-load heat-resistant composite cable, which includes several conductors and optical units, the conductors and optical units are twisted together, and a wrapping tape is arranged on the outside of the conductors and the light unit, and a tearing cable is embedded in the wrapping tape An outer sheath is provided on the outer side of the tape, an insulating sheath is provided on the outer side of the conductor, an optical unit sheath is provided on the outer side of the optical unit, and the optical unit sheath includes the following materials by weight: ethylene- 60~80 parts of vinyl acetate copolymer, 10~20 parts of linear low density polyethylene, 10~20 parts of EPDM rubber, 1~2.5 parts of vinyl triethoxysilane, didodecyl thiodipropionate 1~2 parts of alkyl ester, 0.5~2 parts of silicone masterbatch, 2~5 parts of lead oxide powder, 3~6 parts of ethoxylated trimethylolpropane triacrylate, N,N,N',N' ‑tetrakis[4‑(dibutylamino)phenyl]‑1,4‑phenylenediamine hexafluoroantimonate 1~3 parts, diphenylguanidine 0.5~1.5 parts, sodium lauryl sulfate 1~2 parts. The optical unit sheath in the high-load heat-resistant composite cable can isolate high temperature from the outside.

The invention discloses an aircraft fuel tank capable of automatically adjusting the temperature of a tank, relating to the technical field of aircraft fuel tanks, include a housing, the lower surfaceof the shell is fixedly connected with the upper surface of the bottom plate, The upper surface of the shell is communicated with the lower end of the feeding port, and the upper surface of the shellis fixedly connected with a supercharger. The left side of the shell is provided with a supercharger valve and a pressure reducing valve, and the supercharger valve is positioned above the pressure reducing valve, and the left side of the shell is provided with a safety valve, and the safety valve is positioned above the supercharger valve. Which can automatically adjust the temperature of the tank, through the booster valve, Pressure relief valve, turbocharger, Liquid nitrogen tank, vacuum layer, valve, vacuum layer, conduit and sealed tank cooperate with each other. When liquid nitrogen changes from liquid to gas in vacuum layer, it will absorb heat from the surface of fuel tank body, and nitrogen gas will be discharged from the valve to take away heat from the surface of fuel tank body, so as to regulate the temperature of fuel tank body, thus ensuring that the fuel tank body of aircraft is not affected by external temperature.