930 results about "Water baths" patented technology

A grouting simulation test system and method for high-temperature water-rich filled fractures. The grouting simulation test system comprises: a water head intelligent sensing and adjusting module, a fracture medium intelligent simulation module, a double-liquid grouting module, a data analysis module, and an intelligent control module. The fracture medium intelligent simulation module comprises a water bath circulation temperature control unit, a fracture model (11), and an opening degree adjustment unit. The water bath circulation temperature control unit is arranged on upper and lower sides of the fracture model (11). Circulating water is provided in the water bath circulation temperature control unit, and the temperature of the circulating water is controllable. The fracture model (11) is formed by combining a plurality of model units. The opening degree adjustment unit is connected to the water bath circulation temperature control unit above the fracture model (11) and is capable of raising and lowering the water bath circulation temperature control unit. The present test system can achieve the study of a grouting diffusion mechanism under the coupling action of two or more factors such as different slurry properties, dynamic water flow velocity, dynamic water temperature, fracture medium multivariate factors, medium temperature, and filling conditions.

The embodiment of the invention provides a high-temperature and high-humidity flue gas generation device. A first carrier gas pipeline is provided with a first carrier gas flow controller and a permeation humidification module; the standard gas pipeline is provided with a standard gas flow controller; the second carrier gas pipeline is provided with a second carrier gas flow controller; the output ends of the first carrier gas pipeline and the standard gas pipeline are communicated with the input end of the gas mixing pipe; the output end of the gas mixing pipe is communicated with the input end of the target gas pipeline; a water bath temperature control part of the permeation humidification module heats the carrier gas to a first target temperature, wherein the first target temperature is close to the upper limit of the working temperature range of the dew-point instrument; a target gas temperature control part on the target gas pipeline heats the target gas to a second target temperature higher than the first target temperature; the control module is used for controlling the first carrier gas flow controller to convey carrier gas with fixed flow, adjusting the carrier gas flow conveyed by the second carrier gas flow controller and adjusting the standard gas flow conveyed by the standard gas flow controller so as to adjust the humidity and the concentration of target gas.

The invention discloses a structural strength detection device for sealing ring production, which comprises a base and an auxiliary pressing plate, the base is provided with a water bath pool, the inner wall of the bottom of the water bath pool is provided with four heaters in rectangular distribution, the upper part of the base is provided with a U-shaped frame, the middle position of the upper part of the U-shaped frame is provided with a driving rod in a threaded manner, and the driving rod is connected with the auxiliary pressing plate. A connecting shaft is rotationally arranged at the bottom end of the driving rod, a first pressure sensor is arranged at the bottom end of the connecting shaft, a four-corner jacking mechanism is arranged at the bottom of the first pressure sensor, and the auxiliary pressing plate is arranged at the bottom of the four-corner jacking mechanism. According to the invention, data detection and collection can be carried out on the sealing ring body through comprehensive factor changes, and data collection can be carried out on the sealing ring body under single factor changes, so that more comprehensive structural strength data of the sealing ring body can be obtained; the structural strength analysis structure of the sealing ring body obtained through data analysis can be more accurate and fit the reality.

The utility model discloses a vacuum parallel concentrator convenient for opening an upper cover, which belongs to the technical field of concentrators, and adopts the technical scheme that the vacuum parallel concentrator comprises an oscillation module, and a hot bath module is arranged at the top of the oscillation module. The problem that the sealing effect is poor due to the difference of manual operation techniques and force of a user is avoided, the electric push rod accurately controls the rotating rod to rotate, so that the cover plate is driven to be stably opened and closed, it is ensured that the position and the pressing degree are consistent every time closing is conducted, and the sealing environment of the hot bath module and the sample tube in the hot bath module is effectively guaranteed; the experimental accuracy and stability are improved, the operation convenience is greatly improved, the labor intensity of a user is reduced, especially when multiple samples are treated, the operation time is saved through the automatic opening and closing function, the working efficiency is improved, the overall use experience is optimized, and the equipment operation better meets the efficient and accurate requirements of modern laboratories.

The invention relates to a cold-drawn steel wire for a 8.8-grade cold heading non-quenched and tempered bolt and a manufacturing method of the cold-drawn steel wire, and belongs to the field of production of steel wires for fasteners. The steel wire comprises the following chemical components in percentage by mass: 0.18-0.26% of C, less than or equal to 0.35% of Si, 0.60-1.00% of Mn, less than or equal to 0.025% of P, less than or equal to 0.025% of S, less than or equal to 0.30% of Cr, less than or equal to 0.30% of Ni, less than or equal to 0.30% of Cu and the balance of Fe and inevitable impurity elements. And the diameter range of the produced wire rod is phi 5.5-25mm. The production process of the steel wire comprises the steps of converter or electric furnace smelting, LF refining, vacuum degassing, continuous casting, heating, wire rod temperature control rolling, EDC water bath + stelmor capping cooling and wire drawing. The cold-drawn steel wire produced by the method has a uniform and fine ferrite and bainite structure, is good in plasticity, and can be directly formed into a bolt in a cold heading manner after being drawn, and spheroidizing annealing treatment of a wire rod and quenching and tempering heat treatment of bolt forming are omitted.

The invention discloses an accelerated aging test system and method for a high-density polyethylene buried pipeline, and the system comprises a box body which is internally provided with a test chamber for an aging test; a plurality of buried pipeline test pieces are arranged in the test chamber in a drawable manner through the test piece dismounting and mounting system; the in-pipe pressurization system is used for carrying out gas pressurization on the plurality of buried pipeline test pieces; the water bath system is used for injecting water into the test chamber to provide a water bath environment; the high-temperature system is used for heating the environment temperature in the test chamber or is matched with the water bath system to provide water bath environments with different temperatures for the plurality of buried pipeline test pieces; the ultraviolet irradiation system is used for performing ultraviolet irradiation on the plurality of buried pipeline test pieces; and the in-pipe pressurization system, the water bath system and the high-temperature system are all connected with the control system. According to the invention, coupling conditions of various aging factors during real service of the buried pipeline can be truly and rapidly simulated, effective reference basis can be provided for safe operation and construction design of the high-density polyethylene buried pipeline, and the method has great advantages.

An experimental apparatus for planar interfacial shear of a hydrate-bearing sediment includes a planar interfacial shear box, a torsional and axial loading device, a nitrogen gas source, a methane gas source, a pressure-volume controller, a water bath device, a back pressure valve, a gas-water separator, a gas flowmeter, and a data acquisition system. The planar interfacial shear box includes an upper pressing plate, an upper adapter, an upper thermal insulation plate, a ram adapter, a lower ram, an upper base, a lower base, a lower thermal insulation plate, a lower adapter, and a lower pressing plate that are coaxially connected in sequence from top to bottom. The experimental apparatus offers a simple specimen preparation method, enabling in-situ formation of a hydrate-bearing sediment in the shear box. The experimental apparatus ensures uniform stress distribution during shearing, and can acquire the interfacial shear mechanical characteristic between the hydrate-bearing sediment and a structure.

The present invention relates to a system for providing hot or cold therapy, featuring a tub with a shell comprising a base, head and foot end walls, and left and right walls forming a recess for water containment. The tub includes a seat with a horizontal surface extending from the foot end wall, and side and head end walls extending downward, creating left and right foot cubbies adjacent to the tub shell walls. A control unit, extending from the foot end wall, houses a heat pump unit for heating or cooling a water temperature, and may include a UV filter, a carbon filter unit, and a water pump. This system is designed to offer therapeutic benefits through temperature-controlled water immersion, with optional or included features for enhanced water quality, hygiene, utility and comfort.

The invention provides a building external window solar heat gain coefficient detection device and a control method thereof. According to the device, a detection chamber is divided into an outdoor environment simulation chamber and a heat metering box environment chamber through a partition wall. And a test piece frame for arranging a tested piece is arranged on the partition wall body. A heat metering box, a cooling circulation system and a data acquisition device are arranged in the heat metering box environment chamber. The heat metering box is provided with an opening located at the test piece frame so as to receive simulation radiation of the outdoor environment simulation chamber penetrating through the tested piece. The detection work of the solar heat gain coefficient of the external window of the building is not influenced by natural conditions such as weather, and the test efficiency is improved. Furthermore, a channel flat pipe and a constant-temperature water bath device in the cooling circulation system are matched with each other, it is guaranteed that the temperature in the environment chamber of the heat metering box is kept stable, and the stability and accuracy of detection data are improved while the structure of the device is simplified.

The invention discloses a natural gas hydrate formation evolution simulation device and a control method thereof, and relates to the technical field of geophysics. The simulation device comprises a disconnection control anticlinal stratum simulation system, a variable-capacity low-temperature water bath circulation system, a hydrate evolution dynamic monitoring system, a data transmission control system, a hydraulic pressure water tank module and a gas source supply module. By means of the simulation device, accurate simulation and real-time monitoring and recording of the dynamic evolution process of the hydrate under the control of structural factors, especially under different space-time configuration combinations of the trap overflow point position and the stability domain are achieved; according to the invention, the limitation of the existing simulation technology on structural design and function realization is effectively overcome, and a simulation device and technical support are provided for deepening reservoir forming characteristics and enrichment rules of the structure control type hydrate.

The utility model provides a constant temperature water bath pot for detection, which relates to the field of detection technology, including a pot body and a pot cover, a heating chamber is provided on the top of the pot body, an electric heating tube is fixedly installed on the bottom end of the inner wall of the heating chamber, a partition and a limit block are respectively fixedly installed on the side surfaces of the inner wall of the heating chamber, an opening is provided on the top of the pot cover, a stable cover is placed on the top of the opening, a test tube is arranged inside the pot body, a hollow block is fixedly connected to the bottom of the stable cover, the partition divides the heating chamber into two cavities, pure water is added into the fixed tube, and tap water is added to the top of the partition, the electric heating tube heats the pure water, and the partition conducts heat to transfer heat to the tap water for heating, so as to prevent scale from being generated on the surface of the electric heating tube and affecting the heat exchange efficiency, and when the bottom end of the test tube is inserted into the through hole, the first clamping block and the second clamping block can be made to approach the surface of the test tube at the same time by turning the handle, so as to clamp and fix the test tube and prevent the test tube from shaking when heated.

The invention belongs to the technical field of coal mine fire prevention and extinguishing, and particularly provides a coal mine goaf fire simulation experiment device and method. Comprising an experiment table groove body, a working face channel, an air inlet way, an air return way, a ventilation system, a goaf groove body, a water bath heating and heat preservation system, a goaf temperature simulation system, a distributed temperature acquisition system, a goaf gas environment simulation system and a gas acquisition system. According to the invention, the inclination pitching angle, the coal rock porosity, the goaf ignition position, the internal gas components and the like of the goaf can be simulated according to the actual conditions of different working surfaces of each coal mine, and the evolutionary process of the spontaneous ignition accident of the goaf is realized. According to experimental data, development and change states of internal temperature, gas components and the like of the goaf of each coal mine can be determined, key fire prevention and control areas of the goaf in each period of coal mining are found out, early warning is performed in advance, and life and property safety of underground personnel is guaranteed.

The utility model discloses an article viscosity measuring device which comprises a viscometer, a water bath box and a temperature controller, a temperature sensor is fixedly installed at the middle end of the bottom of an inner cavity of the water bath box, an electric heating pipe is fixedly installed at the lower end of the inner cavity of the water bath box, and a protective cover plate is movably connected to the top of the outer surface of the water bath box. And the right end of the protective cover plate is movably connected with a viscosity pipe. Through the arrangement of the viscosity tube, fluid needing to be tested can be contained, through the arrangement of the adjusting screw rod, the U-shaped guide plate, the guide groove, the locking clamping block and the L-shaped guide strip, the effect of rapidly clamping and fixing the viscosity tube is achieved, the viscosity tube is effectively prevented from displacing, and the working efficiency is improved. Meanwhile, through the arrangement of an electric heating pipe, a temperature sensor, a water bath box and a temperature controller, the effect of constantly regulating and controlling the temperature around the viscosity pipe is achieved, and the accuracy of subsequent detection of the viscometer on the fluid in the viscosity pipe is effectively guaranteed.

The utility model discloses a vertical rotary evaporator which comprises a rotary evaporator body, a water bath furnace used for containing liquid for heating a rotary bottle is arranged above the rotary evaporator body, and a liquid storage tank used for storing the heated liquid for standby application is arranged above the rotary evaporator body. A floating assembly used for alternately and automatically opening and closing a liquid inlet wheel and a liquid outlet wheel formed in one side of the water bath furnace is arranged in the water bath furnace. According to the water bath furnace, the floating block drives the baffle to float in liquid in the water bath furnace, when the liquid in the water bath furnace is in a right state, the baffle ascends to block the liquid inlet of the water bath furnace, the liquid outlet is opened, and part of the liquid is conveyed into the liquid storage tank through the liquid outlet pipe; when the water bath furnace works, the baffle descends to block the liquid outlet, the liquid inlet is opened, the liquid in the liquid storage tank is conveyed into the water bath furnace through the liquid inlet pipe, and the liquid in the liquid storage tank is heated through the heating rod.

The invention provides a modeling method of a litchi fresh-keeping and thawing temperature control model based on a thermodynamic model in an electromagnetic field. The modeling method specifically comprises the following steps: S1, establishing a thermodynamic model of a litchi fresh-keeping and thawing system; s2, obtaining the specific heat capacity of the litchis according to the thermodynamic model; s3, calculating the internal temperature of the litchis; s4, constructing a GRU model, and training the GRU model by using the litchi internal temperature data obtained in the step S3 and the collected unfreezing environment temperature and unfreezing water bath temperature as a training set; s5, a whale optimization algorithm is adopted to optimize the GRU model, the optimized GRU model outputs the litchi thawing temperature Tpred (t), and t is time; and S6, a litchi thawing temperature control strategy based on a fuzzy PID controller is constructed, the Tpred (t) serves as the input of the litchi thawing temperature control strategy, the Tpred (t) is compared with a preset value, and output control is conducted according to the comparison result.

The utility model provides a device for testing defoaming and foam inhibition performance, which is characterized by comprising an air pump, a three-way pipe, a first measuring cylinder, a second measuring cylinder, a foaming structure and a constant-temperature circulating water bath device, the air pump is connected with a first end of the three-way pipe through a first connecting pipe, the first measuring cylinder and the second measuring cylinder are identical in structure, and jackets are arranged on the outer walls of the measuring cylinders. The jacket of the first measuring cylinder is connected with the jacket of the second measuring cylinder through a second connecting pipe, the jacket of the second measuring cylinder is connected with one end of the constant-temperature circulating water bath through a third connecting pipe, and the jacket of the first measuring cylinder is connected with the other end of the constant-temperature circulating water bath through a fourth connecting pipe; the second end and the third end of the three-way pipe are connected with foaming structures through a fifth connecting pipe and a sixth connecting pipe respectively, and the two foaming structures stretch into the first measuring cylinder and the second measuring cylinder respectively. The device for testing the defoaming and foam-inhibiting performance can be operated simply and test the defoaming and foam-inhibiting performance quickly.

The utility model discloses a constant temperature device for food inspection and detection, which belongs to the technical field of food inspection and detection and comprises a water bath kettle, a top cover is mounted at the top of the water bath kettle, a water adding hole is formed in the middle of the top cover, four placing holes are uniformly formed in the top cover, and limiting components are correspondingly arranged below the placing holes. By arranging the limiting assembly, a worker places a beaker containing a sample in the fixing frame and adds quantitative distilled water into the water bath kettle, at the moment, the floating plate moves upwards along the fixing frame under the buoyancy of water, the sliding base is driven to move along the base through the connecting rod and the connecting base in the moving process, and the opposite face of the base is of an inclined structure; the two sliding seats can be gathered towards the middle part of the placing hole until the two sliding seats are in contact with the outer side of the beaker to clamp the beaker, so that the stability of the beaker in a constant-temperature heating process can be ensured, a food detection sample is prevented from shaking, and the accuracy of a detection result is ensured.

The invention discloses a preparation method of a photocuring release agent suitable for a flexible substrate, and belongs to the technical field of release agents. The preparation method disclosed by the invention comprises the following steps: respectively preparing the dynamic epoxy acrylate, the biological fiber and the SiO2 (at) PDMS compound; the preparation method comprises the following steps: adding dynamic epoxy acrylate, a flexible monomer PEG400DA and an antistatic agent into a reaction kettle, stirring in a water bath at 60 DEG C, adding biological fibers and the SiO2-coated PDMS compound, dispersing, grinding by three rollers, adding a photoinitiator, a flatting agent and a defoaming agent, stirring at a low speed under a dark condition, and transferring a mixed solution to a vacuum defoaming machine for treatment. Through dynamic covalent bond design, a synergistic effect of a biological-inorganic composite material and refined process control, the problems of high shrinkage, low flexibility and insufficient interface bonding force of a flexible substrate photocuring release agent are solved.

The invention discloses a low-temperature safety valve leakage detection device based on electrical capacitance tomography, which comprises a liquid nitrogen storage container, a test container, a low-temperature stop valve, a detected low-temperature safety valve, a constant-temperature water bath device, a flow meter, a water tank, a leakage detection pipeline, a capacitance measurement system and a data acquisition and software system, the capacitance measuring system comprises a plurality of groups of copper electrode plates and a processing module, each group of copper electrode plates comprises two copper electrode plates arranged on two opposite side parts of the water tank, and the copper electrode plates are used for capturing bubbles formed by the low-temperature gas in the cavity and acquiring capacitance signals; and the copper electrode plate is electrically connected with the data acquisition and software system through the lead electrode plate connector and the shielding coaxial cable. Insulation supports are arranged between the water tank and the copper electrode plates, the interior of the water tank is divided into a plurality of cavities, and communication gaps are formed between the adjacent cavities. The invention further discloses a low-temperature safety valve leakage detection method based on electrical capacitance tomography. According to the method, the accuracy and comprehensiveness of calculating the leakage rate of the low-temperature gas are improved.

The invention belongs to the technical field of petroleum non-metal composite pipe performance testing, and particularly relates to a non-metal composite material whole pipe apparent heat conductivity coefficient testing method and device. The invention relates to a method for testing the visual heat conductivity coefficient of a whole pipe of a non-metal composite material object. The method comprises the following steps: filling a cavity of a test pipe section with water; a plurality of pipe body temperature measuring points are laid on the outer surface of the test pipe section, and environment temperature measuring points are arranged near the test pipe section; respectively connecting two ends of the test pipe section with a constant-temperature water bath inlet and outlet; setting the constant-temperature water bath temperature, starting a circulating pump after the temperature is constant, and keeping the temperature of the inner and outer surfaces of the to-be-tested pipe section constant; and performing heat flux density measurement on the test pipe section by adopting an unsteady-state heat dissipation method, and determining the apparent heat conductivity coefficient of the test pipe section. The non-heat-flux density is determined by testing the fixed-mass hot water enthalpy drop in the pipe section and the outer side surface area in a short time through a steady-state heat dissipation method, and compared with existing direct measurement of the heat flux density, the error is small, and the whole-pipe apparent heat conductivity coefficient of a non-metal composite material object can be reflected more accurately.

The invention relates to the technical field of concrete fracture tests, in particular to a preparation method of a transparent resin-based imitation concrete material. Comprising the following steps: S1, weighing raw materials: weighing epoxy resin and a curing agent according to a mass ratio of 20: 1; s2, material mixing: pouring the epoxy resin and the curing agent into a stirring cup, placing the stirring cup in a planetary gravity stirrer, and performing high-speed mixing under a vacuum condition; s3, water bath cooling: putting the mixed liquid subjected to vacuum defoaming into cold water for water bath cooling; s4, pouring and forming: slowly pouring the cooled mixed solution into a mold, and standing and primarily curing at room temperature to form an initial setting body; s5, constant-temperature curing: transferring the mold containing the initial setting body into a constant-temperature drying oven, and continuously curing; and S6, demolding the test piece: after curing is completed, removing the mold to obtain the transparent imitation concrete resin test piece with a smooth surface and no bubbles inside. By adopting the transparent resin-based imitation concrete material, the damage characteristic can be directly observed, and an experimental basis is provided for high-pressure water jet stress wave cracking concrete.

The invention provides a method for preparing a fluorocarbon resin super-hydrophobic coating, and relates to the field of coatings. The preparation method comprises the following steps: adding nano silicon dioxide into a mixture of ethanol and water, stirring, and carrying out ultrasonic dispersion to obtain a dispersion liquid; dropwise adding a silane coupling agent into the dispersion liquid, ultrasonically dispersing uniformly, heating and stirring in a water bath, cooling to room temperature, centrifuging, washing a solid with absolute ethyl alcohol, and drying to obtain nano silicon dioxide powder; s2, mixing the nano silicon dioxide powder prepared in the step S1 with an N-methyl pyrrolidone solution of PVDF, and uniformly stirring to obtain coating slurry; and taking an absolute ethyl alcohol solution of epoxy resin as a primer, spraying the primer on the cement surface, curing, spraying the coating slurry, and curing to obtain the coating. The super-hydrophobic coating plays a role in protecting and strengthening the cement matrix, and the mechanical strength of the surface of the cement matrix is improved.

The utility model discloses a pretreatment device for testing free iron in soil, which relates to the technical field of experimental equipment and is used for performing water bath heating on a solution in a test tube placed in a water bath box, a magnetic stirring mechanism for stirring the solution is arranged in the water bath box, and the pretreatment device comprises a plurality of groups of water bath tanks arranged on the water bath box, the water bath box is provided with a plurality of groups of water bath tanks, so that the device can treat a plurality of samples at the same time, water in the whole water bath tanks does not need to be heated for treatment when the water bath box is used, the treatment efficiency is improved, the resource utilization rate is increased, and the water bath box is convenient to use. The water temperature in the inner barrel is controlled through the temperature controller, the heat preservation layers are arranged in the water bath tanks, the water temperature can be prevented from being greatly changed, the situation that the water temperatures in the adjacent water bath tanks are exchanged and the treatment result is affected can be prevented, and the magnetic stirring mechanisms are arranged in the water bath tanks, so that the magnetic rods stir the solution in the test tubes.

The invention provides a metal corrosion measuring device which comprises a circulating mechanism which comprises a storage bottle containing fluid and a water bath kettle connected with the storage bottle, and an experimental mechanism which comprises a circulating pool connected with the storage bottle and the water bath kettle through guide pipes and a metal rod vertically arranged in the circulating pool, and the ultrasonic transmitter is connected with the circulating pool. In addition, the invention also discloses a determination method.

The invention discloses a heat pipe thermophysical property testing device, system and method based on liquid cooling flow equalization, and the device comprises a liquid cooling flow equalization system which is provided with a plurality of parallel and mutually isolated flow channels, and a condensation section of a to-be-tested heat pipe is inserted into a liquid cooling cavity to form forced convection; an upper heating block and a lower heat insulation block of the heating unit clamp and fix an evaporation section of the heat pipe to be tested; the liquid cooling flow equalizing system is arranged on the inclination angle adjusting mechanism; the data acquisition unit comprises temperature sensors which are respectively arranged at liquid inlets and liquid outlets of the flow channels, and at least two temperature sensors which are arranged at a heat insulation section of the heat pipe to be tested; according to the system, a circulating water bath device, a high-pressure constant-flow pump, a filter and a testing device form a closed-loop liquid path. The real heat transfer amount of the heat pipe is inversely calculated through the heat absorption amount of the cooling liquid, the equivalent heat conductivity coefficient and the limit power are obtained by combining the two-point temperature difference of the heat insulation section, multiple heat pipes of different specifications are tested in parallel at a time, and the test efficiency and the data accuracy are improved.

The utility model provides a constant-temperature water bath box which comprises a shell and a water bath container arranged in the shell, and a heating coil is arranged in the shell and corresponds to the exterior of the water bath container. The water bath container is of a cylindrical structure and rotates around the axis, an annular disc is coaxially arranged at the top of the water bath container, the inner diameter of the annular disc is smaller than that of the water bath container, and the water bath container is driven by a motor. A plurality of groups of connecting pieces penetrate through the shell along a circumferential array, the connecting pieces are movably arranged in the normal direction of the water bath container, the connecting pieces are located above the annular disc, circular rings are arranged at the front ends of the connecting pieces, and the inner diameters of the circular rings are larger than the outer diameters of cup bodies of beakers and smaller than the outer diameters of convex edges on the outer sides of the tops of the beakers; the distance between the top face of the ring and the bottom face of the water bath container is larger than the height of the beaker, the ring is located in the inner ring range of the annular disc, and the axis of the ring is parallel to the axis of the annular disc. According to the scheme, the heating uniformity of a test substance can be effectively improved, and the reaction effect can be improved.

The invention relates to the technical field of corrosion tests, in particular to environment simulation equipment based on an internal corrosion test, which comprises a test box, a collection box and a water bath box, the test box is fixedly mounted at the top of the water bath box through four supporting blocks, and the four supporting blocks are respectively positioned at four corners between the test box and the water bath box; the medium box enables the spraying assembly to accurately spray a test medium in the box to the surface of a test sample borne by the bearing assembly through the water inlet pipe and the spraying assembly, a corrosion test simulation environment is constructed, the flow sensor collects medium flow signals in real time, and the control module adjusts the rotating speed of the water pump and the opening degree of the electromagnetic valve according to signal feedback. Precise detection and dynamic adjustment of the spraying flow are achieved, the consistency of spraying working conditions of multiple groups of test samples is guaranteed, meanwhile, the water bath box conducts temperature pretreatment on media in the medium box in a water bath heating mode, the water bath box and a thermometer complete cooperative regulation and control of the temperature, precise control of the test temperature is achieved, and the corrosion simulation requirements of different service environments are met.

The multi-cabin cell viability detection kit comprises a kit body, a plurality of cabins are arranged in the kit body, a water bath mechanism is arranged in each cabin, the water bath mechanism comprises a water bath box, an opening is formed in the top of the water bath box, and the water bath box is provided with a water inlet and a water outlet. A reagent tube is inserted into the opening, the bottom end of the reagent tube extends into the water bath box, and an electric heating rod and a temperature sensor are mounted on the inner wall of the water bath box. According to the utility model, a multi-cabin design is adopted, each cabin is provided with an independent water bath mechanism, incubation experiments of a plurality of cell samples can be simultaneously carried out, the experiment efficiency and throughput are greatly improved, in addition, each water bath mechanism is provided with an independent control panel, a user can independently set the water bath temperature of each cabin according to experiment requirements, and the experiment efficiency is greatly improved. Different environment temperature conditions are simulated, and a more flexible and diversified experiment environment is provided for cell activity detection.

The invention relates to cold drawing steel for a high-straightness precision lead screw and a manufacturing method of the cold drawing steel, and belongs to the technical field of metallurgy. The steel comprises the following chemical components in percentage by mass: 0.50 to 0.60 percent of C, 0.15 to 0.40 percent of Si, 0.60 to 0.90 percent of Mn, less than or equal to 0.025 percent of P, less than or equal to 0.025 percent of S, 0.10 to 0.30 percent of Cr, less than or equal to 0.25 percent of Ni, less than or equal to 0.25 percent of Cu, less than or equal to 0.10 percent of Mo, 0.010 to 0.030 percent of Al, 0.0040 to 0.0080 percent of N and the balance of Fe and inevitable impurity elements. Sorbite, pearlite and a small amount of ferrite structures are obtained in an XDWP water bath and stelmor cooling mode, excellent structure conditions are provided for spheroidizing annealing, the spheroidizing structure obtained through one-time annealing reaches the fifth level or above, higher drawing straightness is obtained, the straightness is smaller than 0.5 mm / m, and the requirement for cold drawing steel for a high-grade lead screw is met.

The invention discloses a lubrication degree detection device for lubricating oil production, and relates to the technical field of lubricating oil detection.The detection device comprises a control console, a lower end cover, a heat preservation box and an upper end cover are sequentially arranged above the control console, and a water bath box is arranged in the heat preservation box; compared with an existing detection device, the detection device is provided with the pretreatment assembly and the cleaning assembly, bubbles in the lubricating oil to be detected can be effectively removed through the pretreatment assembly before the lubricating oil in the viscosity pipe is tested, and therefore the detection precision is improved; after lubricating oil detection is finished, the viscosity tube can be directly cleaned through cooperation of the cleaning assembly and the pretreatment assembly, and meanwhile, the inner wall of the viscosity tube is dried by means of heat of the temperature adjusting mechanism, so that the operation efficiency is improved, the occupied space of equipment is reduced, and the maintenance cost is reduced.