50 results about "Liquid nitrogen container" patented technology

The invention provides an isotope separation system and an isotope separation method.The isotope separation system comprises a cryogenic temperature and pressure swing adsorption device, the cryogenic temperature and pressure swing adsorption device comprises at least two adsorber units, each adsorber unit comprises a liquid nitrogen container and an adsorber, and in each adsorber unit, the liquid nitrogen container is communicated with the adsorber; the adsorber is soaked in the liquid nitrogen in the liquid nitrogen container; the adsorber comprises a pipe wall, the material of the pipe wall comprises a first material, the constant volume heat capacity Qvh of the unit length of the pipe wall is larger than a first preset value, and the wall thickness D of the pipe wall is 0.5-8 cm; a modified Nusselt criterion # imgabs0 # related to the material and thickness of the tube wall is controlled to be within a predetermined range. The problems of low isotope separation efficiency, poor regeneration effect, high liquid nitrogen consumption and high energy consumption in the prior art are solved, and the cyclic utilization rate of the adsorbent and the heavy component isotope recovery rate are remarkably increased.

The utility model discloses a liquid nitrogen quick-frozen microsphere screening device, and aims to improve the screening and counting efficiency in the field of biological medicine liquid nitrogen drop quick-frozen microspheres. The device comprises a liquid nitrogen container, a double-layer microsphere screening device and a microsphere counting device. The liquid nitrogen container is in an open barrel shape, the inner container is used for storing liquid nitrogen, and the shell heat preservation layer reduces heat transmission. The microsphere screening device is composed of two layers of screens with different pore diameters, the first layer is used for filtering microspheres with the diameter larger than that of the microspheres (sd is the standard deviation and the average diameter of the microspheres), the second layer is used for filtering microspheres with the diameter smaller than that of the microspheres, and the second layer of screen is designed to be inclined by 15-30 degrees so that the microspheres can move and gather conveniently. The microsphere counting device is a transparent pipeline, the number of microspheres is determined by calculating the length of the pipeline and the diameter of the microspheres, and rapid counting and split charging are achieved. The problems that in the prior art, quick-frozen microspheres in liquid nitrogen cannot be filtered and screened, and the quick-frozen microspheres cannot be counted and subpackaged are solved.

The invention discloses a liquid nitrogen container provided with a carrying rod rapid cap mounting mechanical device, and particularly relates to the technical field of manipulators or containers provided with operating devices. The liquid nitrogen container comprises a carrying rod echelon conveying mechanism and a rod cap sleeve; the carrying rod echelon conveying mechanism comprises a transmission rail, a pushing rod, a crank shifting rod and a transmission disc. An out-position sliding groove matched with the carrying rod to slide is formed in the transmission rail, one end of the pushing rod is in transmission connection with the transmission disc, and the other end of the pushing rod is in pushing transmission with the carrying rod. A cam sliding groove is formed in the transmission disc, one end of a crank shifting rod is arranged in the cam sliding groove in a sliding mode, the other end of the crank shifting rod is in transmission connection with a carrying rod on the out-of-position sliding groove, and the crank shifting rod is rotationally installed on the transmission rail. The rod cap sleeve is located below the carrying rod. The liquid nitrogen container has the advantages that an operator is assisted in positioning the loading rod and the rod cap, and batch sample loading rods can be quickly processed.

The invention discloses a Dewar flask upper end face sealing structure for a physical adsorption instrument, which comprises triangular cake structures capable of being spliced into a cylinder, each triangular cake structure is provided with an upper functional layer, a middle functional layer and a lower functional layer, the upper functional layer is a weight applying layer, the middle functional layer is an anti-leakage layer, the lower functional layer is a porous fixed supporting layer, and the sections of triangular cakes are the same. And two radiuses corresponding to the central angles of the fan-shaped structures of the upper functional layer, the middle functional layer and the lower functional layer are respectively provided with an inward semicircular gap. The blocking structure between the Dewar flask and the sample tube for the physical adsorption instrument is simple in structure, during working, low-temperature nitrogen volatilized and released from the Dewar flask condenses gas water in air in gaps into ice, the gaps are automatically filled with the ice, the periphery of the outer side of the sample tube can be blocked, loss of liquid nitrogen in a liquid nitrogen container is effectively reduced, and the service life of the sample tube is prolonged. The sustainable testing time after one-time liquid nitrogen adding is prolonged, and the testing effect is guaranteed.

The invention relates to the technical field of liquefaction storage, aims to solve the problems of low liquefaction efficiency, bottleneck of heat insulation performance and low space utilization rate in the prior art, and provides a high-vacuum heat insulation type gas low-temperature liquefaction storage multi-layer container which comprises an outer-layer vacuum heat insulation layer, a middle liquid nitrogen container layer and an inner-layer container which are sequentially arranged from outside to inside, a hoisting structure is arranged at the outer top end of the inner-layer container, the end, away from the inner-layer container, of the hoisting structure sequentially penetrates through the middle liquid nitrogen container layer and the outer-layer vacuum heat insulation layer, and the joints of the outer-layer vacuum heat insulation layer, the middle liquid nitrogen container layer and the hoisting structure are mutually connected in a sealed mode. A spiral heat exchange coil immersed in liquid nitrogen is arranged on the outer top of the inner-layer container, an inlet of the spiral heat exchange coil is connected with an air inlet connecting pipe, the air inlet connecting pipe sequentially penetrates through the middle liquid nitrogen container layer and the outer-layer vacuum heat insulation layer, and an outlet of the spiral heat exchange coil is communicated with the inner-layer container. The invention has the beneficial effects of high liquefaction efficiency, optimized heat insulation performance, enhanced safety, compact structure and small occupied area.

The present invention relates to the field of launch vehicles and provides a detection system for a tank and an engine frame. The system comprises: a liquid nitrogen filling and discharging mechanism comprising a filling pipe and a liquid nitrogen container, the filling pipe being used to connect the tank and the liquid nitrogen container; a pressurizing mechanism comprising a pressurizing air pipe being connected to the tank; a thrust loading mechanism located at the bottom of the engine frame and being used to apply thrust to the center of the engine frame; and a collection mechanism comprising a temperature detecting element and a strain detecting element, the temperature detecting element and the strain detecting element being provided on the surface of the tank and the engine frame, respectively, for detecting the surface temperature and strain of the tank and the surface temperature and strain of the engine frame, thereby realizing multiple performance detection of the tank.

The utility model discloses a movable lifting operation cabin which comprises an operation cabin body, a movable lifting mechanism and a track. An operation cabin is arranged on the movable lifting mechanism, the track is connected with the movable lifting mechanism, the movable lifting mechanism drives the operation cabin to slide on the track and drives the operation cabin to ascend and descend, and the operation cabin is in butt joint with the liquid nitrogen tanks. The lifting mechanism has the advantages that the lifting assembly pushes the operation cabin to vertically ascend and descend in the vertical direction, the direction of pushing force is consistent with the movement direction of the operation cabin, the direction of acting force is more accurate, and more labor is saved; a set of lifting shaft and a gripper assembly are arranged in the operation cabin, the double-cabin liquid nitrogen tank can be stored and taken out through the lifting shaft assembly and the gripper assembly, and compared with the design that in the prior art, liquid nitrogen tanks on the two sides are each provided with a set of storing and taking mechanism, mechanisms in the operation cabin are saved, and meanwhile the mass of the operation cabin can be reduced; the cover moving assembly can be used for opening the cover of the liquid nitrogen container through magnet attraction, and complex cover moving operation is omitted.

The utility model relates to the technical field of liquid nitrogen containers, in particular to a liquid nitrogen container protective cover with a locking structure, which comprises a lower cover body, a lower cover body and a locking structure, the upper cover body is rotationally mounted on the lower cover body; the locking part is arranged between the upper cover body and the lower cover body and is used for keeping the upper cover body locked; according to the liquid nitrogen tank protection cover with the locking structure, a heat preservation protection structure can be formed outside the tank opening through the upper cover body and the lower cover body, potential safety hazards existing in the low-temperature atmosphere of the tank opening are avoided, the situation that the tank opening is accidentally touched to cause human body injuries or the cover plug is loosened due to external object touch is avoided, meanwhile, cooling atmosphere exosmosis can be reduced, and the service life of the liquid nitrogen tank is prolonged. The heat preservation effect can be improved; by arranging the locking part, the safety can be improved, a specially-assigned person can conveniently manage the sample, and the risk that the sample is damaged after mistaken opening is avoided.

The utility model discloses an adjustable vacuum interface valve fixing device for a liquid nitrogen container, belongs to the technical field of mechanical structures, and solves the technical problems that a vacuumizing fixing device for the liquid nitrogen container is high in cost and tedious in vacuumizing process. The fixing device comprises a left fixing ring, a right fixing ring, a fixing ring fixing screw, a connecting plate, a vacuum valve fixing plate and a vacuum interface valve fixing screw. The left fixing ring and the right fixing ring are connected and fixed through the fixing ring fixing screws, and the left fixing ring and the right fixing ring are embedded in the circumferential face of the liquid nitrogen container shell. The vacuum valve fixing plate, the connecting plate and the right fixing ring are sequentially and fixedly connected, and the vacuum connector valve and the vacuum valve fixing plate are fixedly connected through the vacuum connector valve fixing screw. The fixing device is used for fixing the vacuum interface valve when the liquid nitrogen container is vacuumized and maintained.

The invention discloses a low-temperature target table for an ion beam irradiation test, which comprises a vacuum cavity, a sample table and a refrigerating system, and is characterized in that the sample table is positioned in the vacuum cavity; the refrigerating system comprises a liquid nitrogen container, a low-temperature loop and a liquid nitrogen pump, the liquid nitrogen container is located outside the vacuum cavity, the low-temperature loop penetrates through the interior of the sample table, a liquid nitrogen inlet of the low-temperature loop is detachably connected with the liquid nitrogen container, a liquid nitrogen outlet of the low-temperature loop is connected with the liquid nitrogen pump, and the liquid nitrogen pump is connected with the liquid nitrogen container to form a loop; the liquid nitrogen in the liquid nitrogen container is extracted along with the low-temperature loop, so that the liquid nitrogen cools the sample table, the sample table can be rapidly cooled, and the material radiation requirement under the low-temperature condition is met.

The utility model discloses a heat preservation box and an automatic liquid nitrogen container, the heat preservation box is used for being arranged on the automatic liquid nitrogen container, the heat preservation box comprises a box body, a box door and a temperature adjusting module, the box door is arranged on the box body in an opening and closing mode, and the temperature adjusting module is arranged in the box body; when the incubator is used, the temperature in the incubator body is low by adjusting the temperature adjusting module, and the biological tissue taken out from the automatic liquid nitrogen tank is placed in the incubator body of the incubator to be stored. The heat preservation box is arranged at the outlet of the automatic liquid nitrogen tank, and the temperature in the box body is adjusted through the temperature adjusting module, so that the biological tissue can be continuously in a low-temperature environment, and the poor preservation effect caused by repeated refrigeration of the biological tissue is avoided.

1. Name of the Design Product: Large-caliber Liquid Nitrogen Container. 2. Use of the Design Product: The large-caliber liquid nitrogen container is an essential instrument in biochemistry and molecular biology laboratories. As a specialized product in the biomedical field for low-temperature storage, its storage temperature range covers -196°C to -135°C, and it is used for long-term or temporary low-temperature storage of biological samples, blood products, vaccines, drugs, test reagents, etc. By controlling the temperature, the biochemical reactions in the stored samples are reduced, ensuring the biological molecules and cell activity of the samples. Large-caliber liquid nitrogen containers are widely used in institutions such as biological research, metal processing, hospitals, epidemic prevention systems, testing centers, and biopharmaceutical companies. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photo that Best Illustrates the Design Key Points: Perspective view.

The application discloses a waveguide cold noise source and a temperature control method, and solves the problems of unstable output temperature of a waveguide cold noise source, easy leakage of liquid nitrogen and difficulty in replacing a matching load in the prior art. The waveguide cold noise source comprises a sealed liquid nitrogen container, a heat transfer structure, a waveguide mounting rack, a waveguide, a load and a temperature control structure. The waveguide mounting rack is fixedly connected with the liquid nitrogen container through the heat transfer structure. The waveguide is a hollow pipeline installed in a through groove of the waveguide mounting rack. The load is located in a waveguide cavity. The temperature control structure comprises a heating film, a temperature sensor and a PID controller which are located between the liquid nitrogen container and the waveguide mounting rack. The temperature sensor is distributedly installed in the waveguide and measures the physical temperature of the load and feeds back to the PID controller. The PID controller adjusts the heating film according to the physical temperature feedback of the load and controls the working temperature of the load. The device of the application adjusts the physical temperature of the load in an interval and avoids the problems of liquid nitrogen leakage, standing wave deterioration and spectrum expansion difficulty.

The utility model discloses a sample storage tank which comprises a liquid nitrogen tank body, a storage mechanism is arranged in the liquid nitrogen tank body, at least two stages of lifting baskets can be stored in the storage mechanism, the storage mechanism can drive a plurality of sets of lifting baskets to rotate, a lifting basket guiding assembly is arranged on the storage mechanism, and the lifting basket guiding assembly can conduct guiding protection on the lifting baskets. The liquid nitrogen container has the advantages that the storage mechanism is arranged in the liquid nitrogen container body, two-stage storage of the lifting baskets can be achieved through the storage mechanism, the storage capacity can be improved by arranging a plurality of storage areas, the lifting baskets can be conveniently and rapidly lifted by matching the storage mechanism with the lifting channel in a rotating mode, and the liquid nitrogen container is large in storage capacity and convenient to use. A good heat preservation function is also realized.

1. The name of this design product: Mobile boom lift. 2. Purpose of this design product: It is a supporting product for large-caliber liquid nitrogen containers, mainly used for extracting and storing freezing racks, so that a single person can easily complete the extraction and storage of freezing racks. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

The utility model discloses a liquid nitrogen container convenient for storing and taking samples, which relates to the technical field of liquid nitrogen containers and comprises a container body and a container cover, a lifting component is arranged between the container body and the container cover, a rotating seat for placing a sample box is arranged at the lower end of the container body, a sampling port is arranged at the upper end of the container cover, and a sealing cover is arranged on one side of the sampling port. A sample storing and taking assembly is arranged on the other side of the sampling opening. Through mutual cooperation of the lifting assembly and the rotating seat arranged between the tank body and the tank cover, the sampling opening formed in the tank cover, the sealing cover and the sample storing and taking assembly, the problems that a cryopreservation box containing samples needs to be manually placed in the liquid nitrogen tank, efficiency is low, and the sample storing and taking effect is poor are solved. And in the storing and taking-out process, workers have the frostbite risk.

A liquid nitrogen tank airtight weight loss rate detection system based on a weighing device comprises a body and a temperature sensor, and is further provided with a selection unit, a weight acquisition unit, a temperature acquisition unit, a data analysis and calculation unit, a timing unit, a display unit and a setting unit. The signal output end of the temperature sensor is electrically connected with the signal input end of a main control module in the weighing device; the selection unit, the weight acquisition unit, the temperature acquisition unit, the data analysis and calculation unit, the timing unit, the display unit and the setting unit are application software installed in the main control module; the application method of the liquid nitrogen tank airtightness weight loss rate detection system based on the weighing device comprises five steps. The liquid nitrogen weighing device is relatively low in cost and convenient to use, weight data of liquid nitrogen in the liquid nitrogen container and the liquid nitrogen in the liquid nitrogen container can be given at the corresponding environment temperature and the corresponding time period under the action of related software and corresponding processes in the weighing device, whether current leakage data exceed normal values or not can be judged, and powerful technical support is provided for effective use of the liquid nitrogen container.

The utility model relates to the technical field of biological sample storage, in particular to a linkage type liquid nitrogen container which comprises a liquid nitrogen container body, a container cover and a storing and taking mechanism, and the storing and taking mechanism comprises a mounting frame, an electric push rod, a mounting base, a rotating disc, a driving assembly and a connecting arm. After the to-be-stored and taken cryopreservation frame is rotated to the bottom of the tank cover and the tank cover is opened, the electric push rod is started, the hook is driven to descend through the connecting arm, and after a user hangs the end of the hook on the hanging ring of the corresponding cryopreservation frame outside the liquid nitrogen tank body, the electric push rod is started to drive the cryopreservation frame to be stored and taken out. After the cryopreservation frame on the hook is driven by the connecting arm to ascend to the position above the liquid nitrogen tank body, the driving assembly is started, the rotating disc is driven by the driven tooth part to rotate on the mounting base, a user can store and take the cryopreservation frame outside the liquid nitrogen tank body, and by means of the structure, the user can be prevented from being hurt by the low-temperature environment.

The present invention discloses a superconducting current-limiting fuse switch with a narrow neck, comprising a cryogenic liquid nitrogen container, an end cap, a connecting contact, a superconducting melt, and an auxiliary arc-extinguishing device. The switch comprises two different arc-extinguishing methods: a filler arc-extinguishing method in which a solid arc-extinguishing filler is placed around the superconducting melt, and a grid arc-extinguishing method in which an insulating grid and a magnetic field generator are used to assist in arc-extinguishing. Under normal current flow conditions, the superconducting melt of the superconducting current-limiting fuse switch maintains a superconducting state. After a short-circuit fault occurs, the superconducting melt quenches and generates an arc, which is then extinguished by the arc-extinguishing medium, and the superconducting current-limiting fuse switch completes the short-circuit fault interruption. The present invention has a large rated current capacity, low on-state loss, high breaking capacity, and high response speed, effectively providing short-circuit protection for power equipment and possessing high practical value.

The invention discloses a liquid nitrogen tank liquid level monitoring device and method based on a diode sensor, and the device comprises a liquid nitrogen tank, the inner side of the liquid nitrogen tank is provided with a diode sensor liquid level meter, the outer side of a liquid nitrogen tank body is provided with an identity authentication system panel, and a liquid nitrogen tank cover is provided with an electric control lock. The diode sensor liquid level meter, the identity authentication system and the electric control lock are connected through a circuit. A series of circuits are designed on the basis of the principle that different forward voltages exist when a green light-emitting diode is immersed or not immersed in liquid nitrogen when the green light-emitting diode works, multi-point accurate monitoring of the liquid nitrogen container in the low-temperature environment is achieved, the graded alarm function is achieved, and the liquid nitrogen container liquid level monitoring device integrates identity authentication and electric control lock linkage.

The utility model discloses a liquid nitrogen container heat preservation protection device which comprises a liquid nitrogen container assembly, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container, a liquid nitrogen container and a liquid nitrogen container assembly, and the liquid nitrogen container assembly comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell and used for storing liquid nitrogen; and a protection assembly. Foam is input into a containing cavity, in the process, the foam gradually spreads upwards from the bottom of the containing cavity till the containing cavity is filled with the foam, redundant foam is discharged from an outlet, injection of the foam at an inlet is stopped, the outlet is sealed through a second sealing cover, a foam injection pipe is detached, and the inlet is sealed through a first sealing cover. The outlet is sealed firstly, so that when the foam injection pipe is detached from the inlet, the foam in the accommodating cavity cannot leak out along the inlet under the action of negative pressure, the foam in the accommodating cavity can be ensured to be filled compactly, the loss of liquid nitrogen in the inner shell is reduced, and the heat preservation effect is good.

The utility model provides a liquid nitrogen tank convenient for storing and taking a cryopreservation box, and belongs to the field of liquid nitrogen cryopreservation tanks. According to the technical scheme, the liquid nitrogen container comprises a base, a shell, an inner container, a neck tube and a container opening, a plurality of clamping grooves matched with hooks of a lifting basket are formed in the container opening, the hooks are clamped in the clamping grooves, a rotating disc is arranged in the center of the bottom in the liquid nitrogen container, and a thin arc-shaped plate sliding along the inner wall face of the neck tube is arranged on the rotating disc. The liquid nitrogen tank has the beneficial effects that the liquid nitrogen tank is simple in structure, and the lifting basket in which the cryopreservation box is stored can be always kept vertical during storage and taking through the limiting rod and the long clamping plate, so that inclination is avoided, and the liquid nitrogen tank can be smoothly stored and taken.

The utility model discloses a cold loss testing device. The cold loss testing device comprises a first weighing part, a supporting seat, a mounting part, a liquid storage tank and a liquid supply assembly, the supporting seat is arranged on the first weighing piece, and the supporting seat is used for supporting the Dewar; the mounting piece is configured to be connected with and separated from the supporting seat; the liquid supply assembly is connected with the liquid storage tank, the output end of the liquid supply assembly is connected with the mounting part, and when the mounting part is connected with the supporting seat, the output end of the liquid supply assembly is communicated with the outer cavity of the Dewar. The Dewar is placed on the supporting seat, then the mounting piece is connected with the supporting seat, and liquid nitrogen is input into the outer cavity of the Dewar through the liquid supply assembly. And then the supporting seat is weighed through the first weighing piece, and the weight change of the supporting seat is recorded, so that the Dewar cold loss is calculated according to the weight change. Due to the fact that the liquid nitrogen in the liquid storage tank is conveyed to the outer cavity of the Dewar through the liquid supply assembly, the liquid nitrogen does not need to be poured into the Dewar by holding a liquid nitrogen container manually, the situation that the liquid nitrogen splashes is avoided, personal injury is not prone to being caused, and operation safety is improved.

The invention relates to the technical field of refrigeration type infrared detector cold finger assembly testing, in particular to an automatic testing device and method for an infrared detector cold finger assembly, and the device comprises a bearing arm, a lifting module, a rotating platform, a liquid nitrogen container and a heating table; the bearing arm is installed on the lifting module and used for clamping the cold finger assembly. The lifting module is arranged on a rotating part of the rotating platform, and the rotating part is mounted on a base of the rotating platform; the liquid nitrogen container and the heating table are fixed relative to the base, and the liquid nitrogen container and the heating table are both arranged in the working range of the bearing arm. The problem that in the prior art, the efficiency and safety of testing the cold finger assembly are low is solved.

The invention discloses a pre-cooler of a liquid nitrogen reinforced single-stage GM refrigerating machine and a method, and relates to the technical field of superconducting nuclear magnetic resonance, the liquid nitrogen reinforced magnet pre-cooler comprises a main refrigeration loop and a liquid nitrogen reinforced loop, and the main refrigeration loop comprises a circulating press, a main heat exchanger, a single-stage GM large cold head, a cold head heat exchanger and a low-temperature transmission line; the liquid nitrogen strengthening loop comprises a strengthening heat exchanger and a liquid nitrogen container, and liquid nitrogen and a coil heat exchanger are contained in the liquid nitrogen container. According to the magnet pre-cooler of the liquid nitrogen strengthening and single-stage GM refrigerating machine and the method, helium is subjected to strengthening cooling through the liquid nitrogen, the cooling power is effectively improved, the pre-cooling time is shortened, and the electricity consumption cost in the cooling period is reduced; therefore, the energy consumption is reduced.

The present invention relates to a liquid rocket engine nozzle back-pressure low-temperature spray test system. A low-temperature helium medium is supplied via a helium cylinder, a helium delivery pipeline, a heat exchanger, and a low-temperature helium delivery pipeline. Cryogenic cooling of the helium is achieved via a nitrogen cylinder, a nitrogen booster delivery pipeline, a liquid nitrogen container, and a liquid nitrogen cooling delivery pipeline. A back-pressure chamber back-pressure environment is achieved via a nitrogen cylinder and a nitrogen back-pressure delivery pipeline. Liquid nitrogen test medium is supplied via a nitrogen cylinder, a nitrogen booster delivery pipeline, a liquid nitrogen container, and a liquid nitrogen test delivery pipeline. The back-pressure chamber is used to secure the product and create a low-temperature back-pressure spray environment, allowing for visual measurement of the spray field. This allows for measurement of the atomization characteristics of the nozzle in a low-temperature back-pressure environment.

The invention discloses a liquid drop surface heat and mass transfer coefficient measuring device and method, and belongs to the technical field of liquid drop surface heat and mass transfer coefficient measurement. Nitrogen passes through a liquid nitrogen container from a high-pressure nitrogen cylinder and then is introduced into an experiment cavity at a certain temperature, and parameter regulation and control are achieved in cooperation with a heating pipe, a flow meter and the like; a laser displacement sensor is used for measuring droplet quality, a thermocouple is used for measuring temperature, a camera records form, and a data collector and a computer synchronously process data; the method comprises the steps that low-temperature nitrogen drives liquid drops to freeze, a nitrogen purging window is used for preventing fog, and the mass transfer coefficient and the heat exchange coefficient are calculated by measuring the temperature and flow of nitrogen flow, the temperature of the liquid drops and the deflection of nickel-chromium alloy wires and combining the Fick law and energy conservation. According to the liquid drop surface heat and mass transfer coefficient measuring device and method, transient changes are captured through high-frequency data collection, a zero-humidity environment is achieved through nitrogen displacement, form observation is ensured through air curtain antifogging, heat loss is reduced through heat preservation design, and the measuring precision and reliability are improved.

The utility model discloses a reproductive medicine embryo liquid nitrogen container storage device which comprises a liquid nitrogen container. The heat preservation assembly comprises a fixing ring, a fixing frame, arc-shaped grooves, fixing shafts and heat preservation cotton, the fixing ring is fixed to the lower end of the outer surface of the liquid nitrogen tank, the fixing frame is fixed to the upper surface of the fixing ring, the five arc-shaped grooves are formed in the upper surface of the fixing ring at equal intervals, and the five fixing shafts are fixed into the corresponding arc-shaped grooves; the heat preservation cotton is fixedly connected to the outer surface of the fixing shaft, the fixing frame is in an I shape, fixing holes are formed in the two sides of the upper end of the fixing frame, and a fixing plate is fixed to the upper end of the heat preservation cotton. The liquid nitrogen tank has the advantages that the temperature environment in the liquid nitrogen tank becomes more stable through covering of the heat preservation cotton and fixing of the fixing plate, the heat preservation cotton serves as an efficient heat insulation material, conduction of heat through the wall of the liquid nitrogen tank can be effectively reduced, and therefore the evaporation speed of liquid nitrogen is reduced, and the service life of the liquid nitrogen is prolonged.

The invention relates to the technical field of equipment intelligent control, in particular to a vacuum heat insulation liquid nitrogen container storage device and an intelligent control system thereof.The vacuum heat insulation liquid nitrogen container storage device comprises a physical device and an intelligent control device, and the physical device achieves heat insulation through a high vacuum interlayer between an outer container and an inner container and is provided with a liquid nitrogen cold source interlayer, a liquid nitrogen tower drum and other multiple cold source structures; the intelligent control device monitors environmental parameters in real time through the data acquisition module, constructs a virtual model through the digital twinborn simulation module, analyzes data and predicts faults through the intelligent diagnosis and prediction module, generates a control strategy through the self-adaptive optimization control module, and drives the valve body module to adjust liquid nitrogen supply through the distributed cooperative execution module. And after data fusion is carried out on system basic parameters and execution feedback, a control strategy is optimized through an online learning process, a closed-loop control system with an autonomous evolution capability is formed, and the control precision and the system adaptability are continuously improved.

The invention relates to the technical field of animal husbandry and veterinary medicine, in particular to an intelligent animal husbandry and veterinary medicine examination device and a using method thereof.The intelligent animal husbandry and veterinary medicine examination device comprises a gas connector fixedly connected to the top of an anesthesia mechanism body, a launching cylinder fixedly connected to one side of the anesthesia mechanism body and a liquid nitrogen tank; the liquid nitrogen container is fixedly connected to the lower portion of the anesthesia mechanism body, the injection mechanism is fixedly connected to the interior of the anesthesia mechanism body, the injection mechanism is arranged, a pull ring is pulled, a pull rope and a pull rod at one end are driven to deviate towards one side, an abutting block is moved away from the upper portion of an air outlet, an air pump is started, and therefore nitrogen is released; the pressure of nitrogen rushes into the launching cylinder, a clamping block is forced to be separated from the injector, a first spring promotes the injector to be launched quickly, a pull ring is loosened, a second spring enables an abutting block to return to the original position again, and the effects that certain training is not needed, the device is easy to use, fatigue is not likely to happen, threats to the human body are avoided, and convenience is brought to operators are achieved.