39results about How to "Stable and controllable temperature" patented technology

The invention discloses a fast constant temperature microreactor. The fast constant temperature microreactor comprises a sample cell and at least one sample inlet and outlet arranged on the top of the sample cell, wherein the bottom of the sample cell is provided with an inert slab or a microfluidic chip, the top of the sample cell is provided with an inert thin layer, and a sample cell wall formed by a seal cushion is arranged between the inert slab and the inert thin layer; heatconducting blocks and temperature sensors are arranged on the inert thin layer, and the temperature sensors are covered in the heatconducting blocks; temperature control elements are arranged on the heatconducting blocks, and radiating blocks are arranged on the temperature control elements; the side walls of the heatconducting blocks and the side walls of the temperature control elements are covered by insulating housings; and the sample inlet and outlet of the sample cell is communicated with the outside by pipelines. The microreactor has compact size, can be used as a sample cell for a surface plasma resonator, a resonance light scattering apparatus and other analytical instruments to realize the fast temperature change and the accurate constant temperature control of samples in controlled elements, and can meet the operating requirement of high accuracy measurement on temperature-sensing biological samples.

The invention relates to a method for preparing mesoporous activated carbon from shell of jatropha curcas. The waste shell of the jatropha curcas is taken as a raw material, subjected to cleaning and impurity removal, and is carbonized at certain temperature; the obtained carbonized material is conveyed to a microwave oven, and is activated in the vapor atmosphere; and the activated material is dried and screened to obtain the mesoporous activated carbon. The method adopts microwave radiation for heating and raising temperature, and adopts the vapor for activation to prepare the activated carbon; a microwave radiation heating device can control the atmosphere, has adjustable power, and can accurately maintain the stability of the temperature of the material; the method has the advantages of short time of microwave radiation and activation, quick heating, clean and pollution-free preparation process and the like; the mesoporous volume of the product activated carbon reaches 50 to 84 percent; and the main quality index, namely iodine adsorption capacity meets the state grade 1 standard.

The invention provides a culturing method for ammonia oxidizing bacteria. The culturing method comprises the following steps: inoculating ammonia oxidizing bacteria liquid into a fermentation tank; carrying out fermentation culture for 5-7 days; collecting fermentation liquid, so as to obtain the ammonia oxidizing bacteria, wherein the inoculation amount is 5%; the culturing conditions refer to that a pH (Potential of Hydrogen) value is controlled to be 7.5-8.0 by adding a base liquid, a temperature is 25-30 DEG C, a ventilation amount is 1.5-2.0M<3> / h, a tank pressure is 0.05-0.1MPa, and a rotation speed is 180-200r / min; a culture medium is a nitrobacteria culture medium. The culturing method uses a fermentation tank yeast propagation method, so that infectious microbes are difficult to pollute; various parameters, such as the temperature, the pH value, dissolved oxygen and a stirring rotation speed and the like, can be stably controlled; compared with the traditional opened type yeast propagation method, the culturing method for the ammonia oxidizing bacteria can be used for more economically and effectively preparing an ammonia oxidizing bacteria agent, so that the agent can be rapidly and effectively propagated; the culturing method for the ammonia oxidizing bacteria is suitable for large-scale industrial production and has a wide application prospect in a sewage treatment field.

The invention relates to a temperature-sensing synchronous roasting machine, which comprises an electrical heated tube for heating a bakeware and food on the front of the bakeware, a temperature controller for measuring the temperature of the bakeware, and a fuse for electrical safety protection, wherein the electrical heated tube, the temperature controller and the fuse are all arranged on the bakeware; the distance L between the temperature-sensing points of the temperature controller and the fuse on the bakeware is not more than 35mm; the bakeware is provided with a pit; and the fuse is arranged in the pit of the bakeware. In the invention, the distance between the temperature controller and the fuse is very small, thus improving the temperature-sensing synchronism; the temperature of the fuse at normal operation condition changes with that of the temperature controller, and is not influenced or little influenced by external factors, thus ensuring that the fuse has stable and controllable work temperature and guaranteed service life and does not conduct protection prematurely or abnormally advance protection; and when the temperature controller is in normally through condition due to damage, the fuse senses the continued rising of the temperature at the first time and conducts safety protection, thus ensuring personnel safety and having high safety factor.

The invention discloses a forming process and device of a complex curved-surface bullet-proof insert plate. The forming process comprises the following steps that 1, boron carbide powder is granulatedthrough pulping and spray drying, the surfaces of powder particles are modified, a sintering aid is added, the activity between the boron carbide particles in the sintering process is promoted, and ablank is prepared through pressing by using a steel mold; and 2, the prepared blank is placed in a sintering furnace and subjected to vacuum sintering to 2200 DEG C, the temperature is kept for 60 minutes, and after sintering is completed, the blank is cooled and taken out of the furnace. According to the forming process and device of the complex curved-surface bullet-proof insert plate, a loading plate is arranged in the sintering furnace, the temperature of air flow directly making contact with the complex curved-surface bullet-proof insert plate and the loading plate is kept relatively uniform, and meanwhile, the loading plate can stably support the complex curved-surface bullet-proof insert plate, so that the stability of the bullet-proof insert plate in the sintering furnace during sintering is further improved.

The invention relates to a high-wear-resisting flow guide type water nozzle body and a manufacturing method thereof. A water nozzle comprises the water nozzle body and a flow guide ring. The water nozzle body is obtained through square-to-circle hot extrusion rotary forging, and is inclined towards a forging flow line in an inner hole in a concentrated manner, the flow guide ring is arranged in the inner hole, and an acute angle is formed between the water nozzle inner hole and the flow guide ring in a manner of facing the shrinkage opening end contour line. The manufacturing method comprises the steps of precipitation-hardening stainless steel square-to-round hot extrusion rotary forging forming, stabilizing treatment, flow guide structure welding and stabilizing treatment, machining and conventional refining and the like. The strength is high, self wear resistance is achieved, the water nozzle body can be suitable for irregular high-pressure pulse muddy water flushing, and the flow guide function is achieved.

The invention relates to forming equipment for producing dried rolled bean curd under normal-pressure steam conditions. The forming equipment comprises a back-burning type normal-pressure overheatingsteam oven and dried rolled bean curd forming devices, wherein the back-burning type normal-pressure overheating steam oven is used for providing steam for the dried rolled bean curd forming devices for heated forming. By the back-burning type normal-pressure overheating steam oven, generated saturated steam is continuously heated with heat of fume, overheated steam is generated in a normal-pressure state and then is applied to forming of the dried rolled bean curd, the efficiency of forming is high, and meanwhile, the requirements of pulp cooking and baking of a dried rolled bean curd production process on heat supply can also be met; the back-burning type normal-pressure overheating steam oven generates the overheated steam in the normal-pressure state, the steam supply of a plurality ofdried rolled bean curd forming devices can be met, and compared with the traditional normal-pressure steam ovens, the heat efficiency is high and the energy consumption is low; and with respect to pressure-bearing steam boilers, potential safety hazards are less, the technical requirements on design, manufacturing and use are relatively low, customer use is safer and more convenient, and use andoperating costs are lower.

The invention relates to a copper-plastic composite decompression type backflow preventer and its manufacturing method. The main body of the return valve and the forging of the supporting column of the second check valve, the working part arranged in the middle of the first check valve and the second check valve and inserted into the working chamber, the connecting working part and the second check valve of the first check valve The first liquid passage communicates with the working parts and the second liquid passage of the second check valve; the bottom of the working parts is also connected with a pressure stabilizing device; the shell of the backflow preventer is a composite structure with polyamide outside and tin bronze inside. The copper-plastic composite decompression type backflow preventer of the present invention is made of copper-plastic composite material, has low cost, is easy to transport, and enhances the bonding force between plastic and copper through a specific process. It is made of tin bronze forgings obtained through square-to-circle hot extrusion and rotary forging, which is inclined to the inner hole and has a conical forging streamline. It has high strength and fatigue resistance.

The invention discloses a portable electric kettle. The portable electric kettle comprises a kettle body, a kettle cover and an electric connecting seat. The kettle cover is in threaded connection with the kettle body. The electric connecting seat is used for the electric kettle being connected with external electricity. The electric connecting seat is in mortise connection with the kettle body. The kettle body is internally provided with an inductance coil. The kettle cover is internally provided with a heating rod. The heating rod is inserted in water in the kettle body. The induction coil obtains high frequency alternating current from the electric connecting seat to generate a high frequency alternating magnetic field, and therefore the heating rod in the kettle cover is heated, and the water in the kettle body is heated. Electrothermal conversion efficiency is higher than resistance heating. The temperature of the heating rod is stable and controllable, and the service life is longer. The middle section of the kettle body is made of spiral soft material. During application, the kettle body can be stretched to contain and heat more water. The kettle body can be compressed afterapplication, and therefore the occupied space is reduced, and the kettle is portable.

The utility model discloses a mixing device for ceramic tile back adhesive production, which comprises a stirring tank, a mixing assembly is arranged on the inner side of the stirring tank, the mixing assembly comprises a servo motor, a stirring rod, a stirring blade, a driven rod, a stirring sleeve, a driving rod and a supporting frame, the servo motor is mounted on the top of the stirring tank, and the stirring blade is mounted on the stirring sleeve. The stirring rod is connected to the output end of the servo motor, the stirring blades are arranged on the outer side of the stirring rod, the driven rods are connected to the two sides of the stirring rod, the stirring sleeve is arranged on the driven rods, the driving rod is arranged on the stirring sleeve, the supporting frame is arranged at the bottom end of the stirring tank, and the water bath assembly is arranged outside the stirring tank. The water bath assembly comprises an interlayer, a gap and a water tank, the interlayer is arranged on the outer side of the stirring tank, the gap is formed between the interlayer and the stirring tank, and the water tank is arranged on one side of the stirring tank, so that the technical problem that the existing device mentioned in the background technology is insufficient in the stirring process of the tile gum is solved.

The invention relates to a cold accumulation constant-temperature liquid cooling unit which comprises a refrigerating system, a cooling system and a constant-temperature cold accumulation box. The refrigerating system comprises a compressor, a condenser, a water-cooling evaporator and a gas-liquid separator which form a circulation loop; the cooling system comprises a liquid storage tank, a water-cooled heat exchanger and an internal conveying system which form a circulation loop; the water-cooling evaporator and the water-cooling heat exchanger are designed into a whole and are arranged in the constant-temperature cold accumulation box filled with cold accumulation liquid in a staggered manner; the cold accumulation constant-temperature liquid cooling unit is compact and reasonable in structure and convenient to operate, the compressor unit releases a large amount of redundant cooling capacity in the refrigerating process; after the redundant cooling capacity is absorbed by the cold accumulation liquid, the cooling capacity needed by an airplane is input into an airplane system through the cooling liquid, cooling capacity waste is avoided, the purposes of energy conservation, highefficiency and accurate temperature control are achieved, and the requirement of the airplane for guaranteeing the liquid cooling condition is met; the liquid cooling temperature is stable and controllable, the energy consumption is reduced, the flexibility is high, and the stability is high.

The invention provides a culturing method for ammonia oxidizing bacteria. The culturing method comprises the following steps: inoculating ammonia oxidizing bacteria liquid into a fermentation tank; carrying out fermentation culture for 5-7 days; collecting fermentation liquid, so as to obtain the ammonia oxidizing bacteria, wherein the inoculation amount is 5%; the culturing conditions refer to that a pH (Potential of Hydrogen) value is controlled to be 7.5-8.0 by adding a base liquid, a temperature is 25-30 DEG C, a ventilation amount is 1.5-2.0M<3> / h, a tank pressure is 0.05-0.1MPa, and a rotation speed is 180-200r / min; a culture medium is a nitrobacteria culture medium. The culturing method uses a fermentation tank yeast propagation method, so that infectious microbes are difficult to pollute; various parameters, such as the temperature, the pH value, dissolved oxygen and a stirring rotation speed and the like, can be stably controlled; compared with the traditional opened type yeast propagation method, the culturing method for the ammonia oxidizing bacteria can be used for more economically and effectively preparing an ammonia oxidizing bacteria agent, so that the agent can be rapidly and effectively propagated; the culturing method for the ammonia oxidizing bacteria is suitable for large-scale industrial production and has a wide application prospect in a sewage treatment field.

The invention discloses a six-component rod type balance variable-temperature calibration loading device and a calibration correction method, belongs to the technical field of aerodynamic tests, and aims to solve the problem that a wind tunnel balance is poor in loading result accuracy in a continuous high-temperature environment. The device comprises a loading head, the loading head is a cylindrical component, the periphery of a calibration taper sleeve is matched with the inner periphery of the loading head, a wind tunnel balance is connected with the calibration taper sleeve, a heat conduction sleeve is connected to the periphery of the wind tunnel balance in a sleeving mode, a heat insulation lining is arranged on the inner periphery of the loading head, an electromagnetic coil is wound around the heat conduction sleeve, and the heat conduction sleeve is sealed in the loading head through a heat preservation cover plate. The calibration supporting rod penetrates through the heat preservation cover plate and is connected with the right end of the wind tunnel balance, the wind tunnel balance is provided with a balance body temperature sensor, the loading head is provided with an infrared temperature measuring device, and a measuring head of the infrared temperature measuring device faces the electromagnetic coil. According to the invention, the force arm change of the loading point is corrected through the relationship between the heating expansion of the loading head and the temperature, and the accuracy of the loading result of the wind tunnel balance under the high temperature condition can be effectively improved.

The invention belongs to the field of flexible electronics devices, and particularly discloses a preparation method and a product of a shape adaptive fast response soft heater. The method comprises the following steps: (1) spin-coating a polyvinyl alcohol aqueous solution on a hard substrate and heating to cure the hard substrate to form a sacrificial layer; (2) processing the conductive materialinto a conductive layer by screen printing; 3) spin-coating a flexible polymer on the sacrificial layer and heating to cure the flexible polymer; (4) dissolving the sacrificial layer to strip the hardsubstrate; and (6) sticking a copper foil and an insulating layer on the initial soft heater body. The product is prepared by the above method. The soft heater has fast response speed, small requireddriving voltage, large deformation and good shape adaptability and can realize reliable grasping and heating of complex shape objects. Meanwhile, the thermal stability of the soft heater at high temperature is good and the performance of the soft heater can be adjusted by simply controlling the DC voltage of the power supply.

A fumigation facility using a liquid or gas fuel comprises a fumigation pool and a closed fire pit arranged at the lower part of the fumigation pool. The fire pit is internally provided with a main fire channel which communicates with a combustion chamber. The fumigation facility is characterized in that the fumigation pool is formed by combining at least two fumigation grooves; the cross sectionof the fumigation grooves has a rectangular structure at the upper part and an inverted trapezoidal structure at the lower part; the upper parts of the fumigation grooves in the fumigation pool are closely connected, gaps at the lower parts form an auxiliary fire channel; auxiliary fire channel holes exist between the main fire channel and the auxiliary fire channel; a wall is built around the fumigation pool, and the inner side of the wall is fixed with a heat preservation material. According to the fumigation facility using the liquid or gas fuel, clean energy methanol instead of coal is used as the fuel, the production process is green and environmentally friendly, no pollutant residue exists, and the purpose of sustainable development of food production is achieved.

The invention belongs to the field of cellulosic fiber, and particularly discloses a rapid cross-linking method of cellulosic fiber. The rapid crosslinking method comprises the following steps: sending the cellulosic fiber treated by a cross-linking agent into a microwave heating device for microwave heating, and supplementing steam in the microwave heating process. And in the microwave heating process, supplement of steam starts when the fiber temperature is more than or equal to 60 DEG C. According to the method, the fiber can be rapidly heated on a cellulose fiber production line to initiate a cross-linking reaction to prepare the functional cellulose fiber, the method is particularly suitable for achieving a Lyocell short fiber rapid cross-linking reaction on a Lyocell fiber productionline, the fibrillation tendency of Lyocell fiber is reduced, and compared with heating through pure steam and heating through pure microwave, the method is higher in temperature rising speed, carriesout the rapid cross-linking reaction in the heating process, and is better in heating uniformity, lower in energy consumption.

The invention relates to an anti-fatigue impact-resistant pressure relief valve and a manufacturing method thereof. The pressure relief valve comprises a pressure relief valve body, a pressure base, a limiting structure, an anti-fatigue impact-resistant spring, a piston rod and a buffer device, wherein the pressure base and the limiting structure are matched with the pressure relief valve body. The special spring combining the modified intrinsic quality with the enhanced surface and changed material shape and structure is adopted by the anti-fatigue impact-resistant pressure relief valve, so that the safety, the anti-fatigue capacity and impact resistance are greatly improved.

The invention discloses a preparation method of kiwifruit pollen, which comprises the following steps: picking kiwifruit big flower buds in a big flower bud stage, carrying out anther removing and drying, and storing dried pollen at an ultralow temperature of -80 DEG C. The preparation method solves the problem that important indexes such as indoor shade drying, lamp drying and solarization temperature are uncontrollable, and is low in price, simple to operate and easy to popularize; and after being stored at -80 DEG C for one year, the pollen still keeps relatively high activity, so that the requirements on production and scientific research can be effectively met. The drying mode is simple and easy to implement and stable and controllable in temperature, can be achieved by individual farmers and is worthy of popularization; and the activity of the pollen stored by according to the scheme reaches 70% or above after 360 days.

The invention belongs to the field of flexible electronics devices, and particularly discloses a preparation method and a product of a shape adaptive fast response soft heater. The method comprises the following steps: (1) spin-coating a polyvinyl alcohol aqueous solution on a hard substrate and heating to cure the hard substrate to form a sacrificial layer; (2) processing the conductive materialinto a conductive layer by screen printing; 3) spin-coating a flexible polymer on the sacrificial layer and heating to cure the flexible polymer; (4) dissolving the sacrificial layer to strip the hardsubstrate; and (6) sticking a copper foil and an insulating layer on the initial soft heater body. The product is prepared by the above method. The soft heater has fast response speed, small requireddriving voltage, large deformation and good shape adaptability and can realize reliable grasping and heating of complex shape objects. Meanwhile, the thermal stability of the soft heater at high temperature is good and the performance of the soft heater can be adjusted by simply controlling the DC voltage of the power supply.

The invention provides a convective heat transfer flue-cured tobacco lamina re-curing method and device. The device comprises a rotary cylinder, a feeding device, a discharging device, a bidirectional airlock, a heat exchanger, a moisture discharging fan, a circulating fan and the like. A plurality of longitudinal heating plates are arranged on the inner wall of the rotary cylinder, a hollow shaft-shaped pipeline is arranged at the center of the cylinder and is divided into a front segment and a rear segment, and a plurality of high-temperature jet holes are formed in an outer pipe wall. After threshing and pneumatic separation processes, flue-cured tobacco lamina are fed into the rotary cylinder for processing, the moisture content of the flue-cured tobacco lamina is rapidly reduced, the moisture content of the processed flue-cured tobacco lamina is up to 12-13%, and the tobacco lamina directly undergoes a next packaging process. The raw material processing quality is improved, the device and the process are simplified, and energy consumption can be effectively reduced.

The invention relates to a liquid nitrogen biological container capable of reducing temperature difference in a cylinder. The container comprises an outer cylinder body (1), an inner cylinder body (2) and heat transfer elements, the inner cylinder body (2) is arranged in the outer cylinder body (1), liquid nitrogen is arranged in the inner cylinder body (2), the multiple heat transfer elements are uniformly arranged on the inner wall of the inner cylinder body (2), the top ends of the heat transfer elements reach the lower side of the top of the inner cylinder body (2), the bottom ends of the heat transfer elements are immersed in the liquid nitrogen; the heat transfer elements are capillary tubes (4) or heat tubes. The multiple capillary tubes or heat tubes are uniformly distributed on the inner wall of the cylinder body, the bottoms can be immersed in the liquid nitrogen, and the liquid nitrogen rises along the capillary tubes or the heat tubes under the capillary action of the capillary tubes or the heat tubes, so that the temperature of the upper part of the cylinder body is reduced, the liquid nitrogen evaporates at the top and then falls into the liquid nitrogen at the bottom, a circulating temperature control system is formed by rising and evaporation falling of the liquid nitrogen, and the upper-lower temperature difference in the cylinder body is greatly reduced.

The invention relates to concentration equipment of a waste heat thermal pump, and can solve the problem that the environment is polluted to a certain extent in the prior art and control is unstable as the operating flows varying with each individual are undefined commonly. The technical scheme is as follows: a compressor outlet and the inlet of an oil separator of the thermal pump are connected through a pipeline to form a thermal pump system, the outlet of the oil separator of the thermal pump separately communicates with a heater A and an evaporator through a heat source conveying pipelineA and a heat source conveying pipeline B, the left outlet of the evaporator communicates with the right inlet of the heater A, the bottom outlet of the evaporator communicates with a bottom outlet pipeline of the heater A through a heat source conveying pipeline C, the right outlet pipeline which is branched of the evaporator communicates with a condenser A, and the right outlet of the heater A communicates with the inlet of a condenser C. The equipment is simple in structure and low in maintenance cost, avoids the phenomenon of unstable control, and is an innovation in pharmaceutical concentration equipment.

The invention discloses full-automatic multifunctional camera testing equipment which comprises a feeding and discharging storage device, a material transferring device arranged close to the feeding and discharging storage device, a plurality of jig devices arranged on one side of the feeding and discharging storage device, and an LIV testing device arranged close to the upper portion of one end of each jig device. A human eye safety testing device is further arranged above the other end of each jig device, and a speckle testing device is further arranged above the middle of each jig device. The equipment is provided with a common LIV testing device, the plurality of jig devices, a plurality of speckle testing devices and a plurality of human eye safety testing devices, multiple functions of multiple products can be tested at the same time, the testing efficiency is high, the testing precision is high, the device is further provided with a feeding and discharging storage device, automatic feeding and discharging of the products can be achieved, the automation degree is high, the labor cost can be reduced, and the economic benefit is improved.

The invention discloses accelerated aging equipment, which relates to the field of organic semiconductor materials, and constructs a semiconductor device accelerated aging test space with stable structure and controllable environment by integrating an optical platform bread board, a light source module, a supporting and fixing module, a control module and a composite heat dissipation system in a camera obscura body. Wherein the light source module can stably output a continuous simulation sunlight spectrum with adjustable light intensity and light color under the adjustment of the control module, so that accurate illumination accelerated aging of a device to be tested is realized; according to the composite heat dissipation system, the light source module and the supporting and fixing module are subjected to targeted heat dissipation, a heat dissipation circulation loop communicated with the supporting and fixing module is formed, heat accumulation under high light intensity modulation is effectively restrained, the temperature of a test area is kept stable and controllable, and therefore the high acceleration rate is guaranteed, and meanwhile the test efficiency is improved. The interference of thermal runaway on the test result is avoided, and the accuracy, repeatability and reliability of the service life test of the semiconductor device are integrally improved.

The invention discloses a method for preparing methyl acetoacetate, and belongs to the field of chemical technology. The method of the invention comprises the following steps: firstly injecting methanol and a catalyst at a certain flow rate respectively, then using a pump to pump out the crude ester in a buffer tank at a certain flow rate, mixing it with an alcohol solution, and then injecting the diketene and alcohol ester mixed solution into a continuous flow reactor at a certain flow rate for reaction. The method of the invention circulates the crude ester during the continuous reaction process, which can timely and effectively dilute the heat generated by the reaction, and better solves the problem of heat accumulation in the reactor, inability to dissipate heat in time, and thus causing a rapid rise in temperature, reduces safety hazards, improves product quality and yield, and reduces the requirements for the temperature resistance of pipeline equipment.

The invention discloses an ovarian tissue slice freezing operation system which comprises a structure body, the structure body comprises an operation workbench, and the operation workbench is provided with a refrigeration temperature control module, a tissue dripping tank moisturizing module, an internal operation control module and at least one circulating cooling module. A temperature control module and a real-time display module are arranged in the internal operation module, the temperature control module is used for controlling the refrigeration temperature module and the tissue drip irrigation moisturizing module, the operation workbench is further provided with a culture solution storage module and a gooseneck pipe with a water inlet and a water outlet, and the tissue drip irrigation moisturizing module is arranged at a port of the gooseneck pipe. The temperature in the operation process is controllable and adjustable, the ovarian tissue is in a wet operation environment all the time, the air environment making contact with the tissue is efficiently evolved, the interior is in a positive pressure state, and the pollution risk caused by the external environment is avoided. A better operation environment is created for doctors, so that the doctors can conveniently perform tissue slicing work.

The invention provides a phase-change energy accumulation and temperature control device of sealing equipment, comprising a sealing box and a heating component arranged in the box, wherein the surface of the heating component is connected with a phase-change radiator and a phase-change cold plate, and the surface of the phase-change radiator is connected with a slabby semiconductor refrigerator which is communicated with outside by passing through the sealing box. The phase-change energy accumulation cooling device of a sealing electronic device can maintain temperature control capability forthe sealing electronic device working at a severe environmental temperature after a cooling power supply is cut off for a long time, thus being capable of stabilizing working temperature of key components in the sealing electronic equipment in a severe working environment of strong transient thermal shock or cold shock. As the phase-change energy accumulating material has great latent heat of phase change and the semiconductor refrigerator exporting heat out of the sealing box has smaller volume, the device has the advantages of large cooling capability, small volume and low energy consumption as compared with the traditional cooling method. The device can ensure the temperature in the sealing electronic device to be stable and controllable when the working environmental temperature is extremely low.

The invention relates to a pressure-reducing type unloading valve capable of emptying and a manufacturing method thereof. The unloading valve comprises a zinc-manganese-brass unloading valve body, a pressure seat, a limiting structure, a first spring, a second spring, a piston rod and a buffer device, wherein the pressure seat and the limiting structure are matched with the zinc-manganese-brass unloading valve body, the first spring and the second spring are fatigue-resistant and impact-resistant, and the second spring rotates in the reverse direction of the first spring and is installed in the first spring in a sleeved mode. According to the pressure-reducing type unloading valve, the high-level safety is achieved by adopting the organic combination of the nature-modified and surface-enhanced first spring capable of changing the material shape and structure and the second spring manufactured by the same method as the first spring and rotating reversely.

The invention discloses a forming process and device for bulletproof inserts with complex curved surfaces, which includes the following steps: Step 1: After boron carbide powder is granulated through pulping and spray drying, the surface of the powder particles is modified and a sintering aid is added, Promote the activity between boron carbide particles during the sintering process, and press it into a green body with a steel mold; Step 2: Put the prepared green body into the sintering furnace, vacuum sinter to 2200 degrees, and then keep it warm for 60 minutes, and then cool after sintering The forming process and device of the complex curved bulletproof inserts are based on the setter plate installed inside the sintering furnace, and the setter not only maintains a relatively uniform temperature of the airflow directly in contact with the complex curved bulletproof inserts and setters, At the same time, it can play the role of stably supporting the bulletproof insert with complex curved surface, and further improve the stability of the bulletproof insert when sintering inside the sintering furnace body.

The invention relates to a high strength and long life check valve and a manufacturing method thereof. The check valve comprises a check valve main body, an installation seat matched with the check valve main body, a sealing end arranged at the right end of the installation seat, and an oil inlet formed in the check valve main body; the check valve further comprises a spring fixed in the check valve main body, a spring seat, an arch feeding device arranged at the right end of the spring seat and a support column which is used for fixing the arch feeding device and arranged in the right end of the arch feeding device and can obtain a tapered forged flow line inclining to an inner hole in a centralized mode through square-to-circular hot extrusion and rotary forging ,. The check valve can achieve self-complementing of expansion under the high temperature and is high in safety.