34results 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 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 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 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 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 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 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 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.

The invention provides clean and environment-friendly multi-screw desulfurization equipment for a production line for preparing reclaimed rubber, and belongs to the technical field of reclaimed rubber production.The equipment is characterized in that a first transmission shaft group is arranged in a first inner shell and comprises at least three first transmission shafts arranged side by side; each first transmission shaft is provided with a plurality of groups of meshing type screws and desulfurization shearing blocks which are combined in a building block manner; a first cooling channel is arranged between the first transmission shaft and the meshing type screw rod, the first transmission shaft is connected with the meshing type screw rod through a spline, a plurality of second cooling channels are arranged at the spline connection position, and each second cooling channel is communicated with the first cooling channel; and cooling channels with the same structure are arranged between the first transmission shaft and the desulfurization shearing block. According to the invention, special cooling channels are arranged between the transmission shaft and the meshed screw rod and between the transmission shaft and the desulfurization shearing block, so that the temperature in the desulfurization process is controllable and stable, under-desulfurization or over-desulfurization is avoided, and the quality stability of reclaimed rubber is guaranteed.

The invention relates to an adult mouse myocardium separation device. The device comprises a thermostat body, a peristaltic pump, an ice bath box body, an injection hose and a needle head fixer; wherein a culture dish placing area and a centrifuge tube placing area are embedded on upper surfaces of the ice bath box body and the thermostat body; the thermostat body is also provided with a temperature control device for heating and controlling temperature and a bracket for fixing the injection hose; the needle head fixer is connected with a syringe needle head; one end of the injection hose is connected with the needle head fixer; the peristaltic pump can be connected with the injection hose to realize circulation of liquid in the corresponding device; the culture dish placing area is used for placing a corresponding culture dish, the centrifuge tube placing area is used for placing a corresponding centrifuge tube, and a temperature detecting area is used for measuring temperature in thethermostat body. The device can not only provide a constant temperature experimental environment, but also provide a low temperature experimental environment, and facilitate transfer of experimentalobjects, can effectively control a perfusion speed of an isolated heart, simplify operation difficulty of an experiment, and accurately control an experiment process.