35results about How to "Fast thermal response time" patented technology

The invention relates to a thimble assembly of an in-core instrument for a nuclear power station. The thimble assembly comprises armored thermocouples, a header and neutron detectors, wherein at least one armored thermocouple and a plurality of neutron detectors are soldered and fixed together via the header; each neutron detector is a self-powered neutron detector composed of a transmitter, a collecting body, an insulator and a cable; the longest neutron detector of the plurality of neutron detectors has a length identical to the height of the whole reactor core; and the lengths of the rest neutron detectors gradually decrease at an equal interval on the base of the length of the longest neutron detector, or the neutron detectors are of a same length and axially distributed at an equal interval. The thimble assembly is simple and firm in structure and small in size and can adapt to complex environments in reactors. The thimble assembly is applicable to measurement of the outlet temperature of a reactor core in a nuclear power station and measurement of the neutron fluence rate of the core and has long service life.

The invention relates to a platinum resistance temperature sensor with high intensity and fast response. A temperature-sensing element is installed at a small diameter part of a reducing temperature-sensing drivepipe, and insulating materials are filled up between the back end of the temperature-sensing element and the temperature-sensing drivepipe. An inner protective tube is provided with a sheathed signal cable leading wire, and the sheath signal cable leading wire is connected with the temperature-sensing element. The temperature-sensing drivepipe and the inner protective tube are welded together and form a thermometer core, and a sealed tube is welded with the thermometer. A bottom hole is formed in the bottom of a small diameter part of a conical outer protective tube, three groups of diversion holes dividing the circumference equally are formed in the small diameter part of the conical outer protective tube in a radical direction, each group of diversion holes are provided with a plurality of diversion holes along an axial direction, and the rear end of the outer protective tube is in threaded connection with a base of a media fluid channel. The inner cavity of the inner protective tube fits with the inner cavity of the outer protective tube, the inner protective tube and the outer protective tube are connected and sealed with a Swagelok, and the Swagelok body is welded with the outer protective tube. The platinum resistance temperature sensor fits in with the special requirements of high temperature, high pressure and high speed media fluid, and possesses fast thermal response.

A heat dissipating cavity includes a cavity made of high thermal conductive material having a plurality of heat dissipating fins on the outside thereof, and temperature equalizing elements including heat pipes and heat expansion plates, which can be used individually or collectively. The heat generated by the heating electronic elements inside the cavity is first effectively conducted to the temperature equalizing elements, wherefrom effectively and evenly conducted to the entire cavity, and finally released out of the system by the plurality of heat dissipating fins. The use of temperature equalizing elements increases the homogeneity of the cavity's overall temperature and greatly improves the efficiency of heat dissipation.

The invention provides a method for preparing carbon nanotube and PCM-combined phase change temperature control component, which aims to provide a method for preparing a phase change temperature control component with high phase change latent heat and better heat conduction effect. The present invention is implemented as follows: casting pyrolytic graphite in the heat sink bottom and the verticalhot wall surface of a metal conductor packaging container; combining carbon nanotubes and phase change materials by ultrasonic vibration to form a carbon nanotube and phase change composite material,and charging the liquid carbon nanotube and phase change composite material in a heat conductive reinforcing skeleton by a vacuum co-fusion method; welding the heat conductive reinforcing skeleton ina phase change cavity to form a multilayer phase change latent heat self-control adjustment level that the pyrolytic graphite wrapping, in a U-shape, heat conductive reinforcing skeleton, and forminga thermal insulation buffer layer from the phase change cavity; and finally, welding a cover plate on the stepped opening of the metal conductor packaging container by electron beam welding, enclosingto form a closed phase change temperature control component, and processing to obtain the boundary dimension according to requirements.

The invention discloses a nitrogen dioxide gas sensor containing petal-like SnSe2. The nitrogen dioxide gas sensor comprises a gas sensitive material and a heating substrate, wherein the heating substrate is coated with the gas sensitive material, the coating thickness ranges from 1-100 micrometers, and the gas sensitive material is prepared from a petal-like SnSe2 nanomaterial. A preparation process includes the following steps: step 1, mixing 1.6-2.4 mL of C2H8N2 with 30.4-45.6 mL of (CH2OH)2, adding 361-541.6 mg of stannous chloride dihydrate and 126.3-189.5 mg of selenium powder, performing magnetic stirring for 20-30 minutes, pouring the mixture into a reaction kettle for 3-12 hours of reaction at the temperature of 165-180 DEG C, separating an obtained black product by a centrifugalmachine, repeatedly performing washing until the pH of waste liquid is 6.5-7.5, and drying the waste liquid at the temperature of 80 DEG C for 6-12 hours to obtain the petal-like SnSe2; step 2, preparing SnSe2 dispersion liquid; step 3, coating the dispersion liquid onto the heating substrate, and drying the heating substrate in a drying box at the temperature of 80 DEG C to obtain the nitrogen dioxide gas sensor. The nitrogen dioxide gas sensor provided by the invention has the advantages of simple process step, low cost and sensitive response to nitrogen dioxide.

The invention provides a method for integrated preparing of a foam metal phase change temperature control assembly and aims at providing a technology method for solving the problem that in a phase change temperature control assembly, a gap exists between foam metal and a base body material, and the heat response rate is influenced. The method is achieved through the following technical scheme that according to the boundary dimension of a packaging container, a packaging container clamp is prepared; a cavity used for welding the foam metal is machined in the packaging container in advance, a layer of welding piece is laid on the inner side welding face of the cavity of the packaging container, and the contact interface of the foam metal is subjected to tin lining; the foam metal is compressed to the cavity size; the packaging container, the foam metal and the clamp are assembled into a whole and heated, and after cooling, a formed phase change temperature control assembly blank is taken out of the clamp of the packaging container; in the constant-temperature environment, a liquid phase change material is poured into the phase change temperature control assembly from a pouring port in the bottom of the packaging container; and finally, the pouring port is sealed, and machining of the appearance of the temperature control assembly is finished.

A heat dissipating cavity of looped heat pipe structure includes a cavity made of high thermal conductive material having a plurality of heat dissipating fins on the outside thereof, and looped heat pipes. The heat generated by the heating electronic elements inside the cavity is first effectively conducted to the looped heat pipes, wherefrom to the entire cavity, and finally released out of the system by the plurality of heat dissipating fins. The use of looped heat pipes increases the homogeneity of the cavity's overall temperature and greatly improves the efficiency of heat dissipation.

The invention belongs to the technical field of gas sensors, and provides a gold-modified flower-like SnS2 nitrogen dioxide gas sensor and a preparation method thereof. The nitrogen dioxide gas sensorcomprises a gas sensitive material and a heating electrode. The gas sensitive material is uniformly coated on the surface of the heating electrode. The gas sensitive material is flower-like SnS2 withuniformly distributed gold, and has a large surface area-volume ratio structure, and Au nanoparticles can be used as an active catalyst with specific catalytic characteristics, and can enhance the diffusion and transfer rate of adsorbed substances from an active site to an inactive site. The gold-modified flower-like structure nano material is prepared by adopting a hydrothermal method and a water bath method, the raw materials are convenient to obtain, the price is low, and the preparation process is simple.

The invention discloses a ZnSe/ZnO based nitrogen dioxide gas sensor and a preparation process thereof. The sensor comprises a gas sensitive material and a heating electrode, wherein the gas sensitivematerial is coated on the surface of the heating electrode, the coating thickness is 50-80 microns, and the gas sensitive material is a heterojunction composite nano-material formed by zinc selenideand zinc oxide. The preparation process comprises the steps of first, placing zinc selenide powder in an ark, putting the ark in a tubular furnace, introducing a dry gas mixture of 20% of oxygen and 80% of nitrogen for heating at the same time, and reacting at a temperature of 400 DEG C-600 DEG C for 0.5h-4h, then naturally cooling to the room temperature to obtain a ZnSe/ZnO heterojunction; second, putting the ZnSe/ZnO heterojunction powder into a mortar, adding deionized water, and grinding until the solution is in uniform suspension; taking the suspension, coating the suspension on the surface of the heating electrode, placing the sensor in a drying oven to dry at a temperature of 80 DEG C so as to obtain a nitrogen dioxide gas sensor. The nitrogen dioxide gas sensor has the advantagesof simple processing steps, low cost and sensitive response to nitrogen dioxide.

The invention discloses a wear-resistance quick temperature measuring platinum resistance thermometer, which comprises a wear-resistant protecting tube and a platinum resistance thermometer arranged in the protecting tube, and is characterized in that: in the protecting tube, a quick heat conducting body connected with the platinum resistance thermometer is arranged at the temperature sensing end; the platinum resistance thermometer is tightly matched with the inner wall of the protecting tube; and a heat conducting material is filled in small gaps between the platinum resistance thermometer and the inner wall of the protecting tube. The wear-resistance quick temperature measuring platinum resistance thermometer has the advantages that: by selecting the material of the protecting tube and the platinum resistance thermometer, the wear resistance and corrosion resistance are improved by more than three times compared with those of the conventional wear-resistant protecting tube; and the platinum resistance thermometer is tightly matched with the protecting tube, the heat conducting material is filled in the gaps, and the quick heat conducting body is arranged at the temperature sensing end (heat end) of the protecting tube, so that the heat conductivity is improved by 8 times. The wear-resistance quick temperature measuring platinum resistance thermometer has a compact structure, has the thermal response time of less than 5 seconds, meets the performance requirements for corrosion resistance and wear resistance in the tyre rubber vulcanizing process, improves the effect of quickly and accurately measuring temperature of a temperature sensor, is convenient and practical to use, and has obvious effect.

The invention discloses a sheathed thermocouple for an explosion-proof transformer, and relates to a temperature sensing device. The sheathed thermocouple for the explosion-proof transformer comprises an outgoing line hole locking nut, a terminal block, a wiring porcelain plate, a protecting tube, an insulating porcelain tube, a first thermocouple wire and a second thermocouple wire, the insulating porcelain tube is arranged in the protecting tube, the second thermocouple wire and the first thermocouple wire are arranged in the middle of the insulating porcelain tube and at one end of the insulating porcelain tube respectively, the other end of the insulating porcelain tube is connected with the terminal block through the wiring porcelain plate, and the outgoing line hole locking nut is arranged on the outer side of the terminal block. The sheathed thermocouple for the explosion-proof transformer has the advantages of being small in diameter, bendable, resistant to high pressure and vibration, short in thermal response time, firm, durable, high in reliability and the like, and is capable of being used for measuring temperatures in two different environments at the same time, high in response speed, stable in performance and long in service life.

The invention discloses a water-cooling temperature sensor and a mounting method thereof. The water-cooling temperature sensor comprises a NTC module, the NTC module extends into a water pipe connector and is clamped. Through the water-cooling temperature sensor provided by the invention, the NTC module is modularized, and the mounting is convenient.

The invention relates to embedded contact type cigarette temperature measuring equipment. The embedded contact type cigarette temperature measuring equipment comprises a first temperature sensor (11),a second temperature sensor (12), a third temperature sensor (13), a fourth temperature sensor (14), an analog signal amplification module (2), an analog/digital conversion module (3), a data processing and storage module (4), a filter clamping unit (5), a smoke filtering unit (6) and a suction unit (7). The embedded contact type cigarette temperature measuring equipment has the advantages of precise temperature measurement, high sensitivity and the like, is not limited to detection of the temperature of mainstream smoke at the rear end of the filter, and detects the temperature of mainstreamsmoke in the filter, the temperature of a tobacco shred section and the surface temperature of cigarette paper and molding paper.

The invention discloses an ultra-long two-point entity armored-thermocouple of the technical field of armored thermocouples. The thermocouple includes a temperature measuring core. A surface of the temperature measuring core is fixedly connected with a four-hole magnesium oxide pipe. A surface of the four-hole magnesium oxide pipe is fixedly connected with a stainless steel protection pipe. A surface of the stainless steel protection pipe is fixedly connected with a pipeline. A surface of the pipeline is fixedly connected with a high-temperature resisting layer. A surface of the high-temperature resisting layer is fixedly connected with a rustproof layer. A pipeline A point is arranged on the surface of the pipeline. According to the thermocouple, pipe permeating links in old technology can be eliminated through cooperation use of the temperature measuring core, the four-hole magnesium oxide pipe, the stainless steel protection pipe and the pipeline, thermal response time of the pipeline A point and a pipeline B point can be effectively improved because certain space exists in a protection pipe of a pipeline A point and a pipeline B point of the traditional technology, and thermalresponse time is relatively long, length can exceed a kilometer, and production can be completed in a workshop due to no pipe permeating technology.

The invention provides a rotating speed, temperature and vibration signal acquisition sensor and a manufacturing method, and belongs to the technical field of sensors. The sensor comprises a shell; a circuit board which is installed in the shell through a fastener, wherein a Hall element, a thermistor and an acceleration chip are welded to the circuit board, the Hall element corresponds to the speed measuring gear in position, the thermistor corresponds to the bearing in position, and the acceleration chip corresponds to the position of the bearing. According to the invention, the corresponding detection elements for detecting the rotating speed, the temperature and the vibration signal parameters are integrated on the same circuit board, and the circuit board is installed in the shell to form a single sensor, so that the size of the whole sensor is reduced on the basis of meeting the detection of the three parameters, and the miniaturization of the sensor design is realized; therefore, reasonable wiring and installation of the sensor in the bearing box with limited space can be facilitated.

The invention discloses a high-precision distributed temperature measurement system, which comprises a temperature sensor assembly, a temperature acquisition assembly and a thermal control lower computer, wherein the temperature sensor assembly comprises a platinum resistor, a precision resistor, a signal conditioning circuit and a packaging shell body; the platinum resistor and the precision resistor are connected in series and installed in the packaging shell body; the platinum resistor and the precision resistor are temperature quantity signal input sources, and the conditioning circuit conditions a temperature measured signal into a voltage signal to be acquired by the temperature acquisition assembly; the temperature sensor assembly and the temperature acquisition assembly are arranged at temperature control objects, the number of the temperature acquisition assemblies is one, and one temperature acquisition assembly corresponds to 1-4 temperature sensor assemblies; and a multi-way switch is used for switching different temperature acquisition assemblies, the potential difference between the platinum resistor and the precision resistor is acquired, the potential difference isamplified and converted into a digital signal, the digital signal is transmitted to the thermal control lower computer, and the measured temperature is obtained through calculation by means of the thermal control lower computer. According to the high-precision distributed temperature measurement system, the temperature measurement precision and stability are effectively improved.