19 results about "Liquid nitrogen container" patented technology

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 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 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 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 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.

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 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 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 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.

The utility model discloses an array distribution type high-purity germanium detector mixed refrigerating system which comprises a nitrogen generating device, a main gas pipe and a main liquid pipe, the main gas pipe and the main liquid pipe are connected with the nitrogen generating device, and high-purity germanium detector mixed refrigerating devices distributed in an array mode are arranged on the main gas pipe and the main liquid pipe. Each high-purity germanium detector mixed refrigeration device comprises a liquid nitrogen container, and the liquid nitrogen container is further provided with an air inlet pipe with one end inserted into the liquid nitrogen container and one end connected with the main air pipe and a liquid inlet pipe with one end inserted into the liquid nitrogen container and one end connected with the main liquid pipe. According to the scheme, a plurality of high-purity germanium detector mixed refrigeration devices are integrated and connected through the distributed bus, and the same nitrogen source and liquid nitrogen source can be shared, so that mixed refrigeration of the array distributed high-purity germanium detectors is realized, and all the high-purity germanium detectors are in the optimal working state.

The utility model belongs to the field of liquid nitrogen container discloses a low temperature storage container, including top layer, interlayer, bottom layer and stand, top layer, interlayer, bottom layer and stand are sheet metal spare, top layer, interlayer and bottom layer are connected with stand through the clamping structure respectively. The utility model's clamping structure sets up the plug -in piece and the limiting portion in concentration, can make the limiting portion when the connecting plate part one and the connecting plate part two carry out the clamping can be synchronous and be in place, and the limiting portion cooperation hole portion's stop retreats part can realize the stop retreat effect, and the assembly is convenient, also avoided the stop retreat structure and needed to set up on the stand and led to the situation of carrying out the secondary processing to the stand, reduced the processing procedure, improved the degree of simplification of container surface structure.

The utility model provides lifting equipment for a cryopreservation frame, and relates to the technical field of cryopreservation. The lifting equipment for the cryopreservation frame comprises an annular installation cylinder installed below a tank opening of a liquid nitrogen tank, and an installation opening is formed between the middle of the installation cylinder and the tank opening of the liquid nitrogen tank; the rotating assembly is mounted on the mounting cylinder; the lifting assembly is rotationally mounted in the mounting opening and connected with the rotating assembly; the grabbing assembly is mounted on the lifting assembly; the lifting assembly comprises a mounting frame mounted on the inner side wall of the mounting cylinder; the first linear motion mechanism is mounted on the mounting frame; and the second linear motion mechanism is installed on the first linear motion mechanism, the second linear motion mechanism is driven by the first linear motion mechanism to move in the axis direction of the liquid nitrogen container, and the grabbing assembly is installed on the second linear motion mechanism. The grabbing assembly is driven by the two linear motion mechanisms to grab the cryopreservation frame, and the cryopreservation frame is sent out of the liquid nitrogen tank through the two linear motion mechanisms after grabbing.

The invention provides a freezing measurement device and method for vacuum detection, and belongs to the technical field of vacuum detection. The device comprises a mobile control cabinet; the freezing U-shaped pipe, the lifting weighing unit, the liquid nitrogen injection unit and the control unit are arranged in the mobile control cabinet, a first port of the freezing U-shaped pipe is communicated with the vacuum detection display unit, and a second port of the freezing U-shaped pipe is communicated with a detected system through an electric vacuum valve; a liquid nitrogen container is arranged on the lifting weighing unit, and the liquid nitrogen container is driven by the lifting weighing unit to do reciprocating motion in the vertical direction; a first port of the liquid nitrogen injection unit extends into the liquid nitrogen container, and a second port of the liquid nitrogen injection unit is communicated with an external liquid nitrogen source; and the control unit is electrically connected with the vacuum detection display unit, the lifting weighing unit, the liquid nitrogen injection unit and the electric vacuum valve. According to the device, automatic vacuum freezing detection is realized, the detection safety is improved, and the cost is reduced.

The invention discloses high-strength low-fat low-temperature heat insulation paper for a liquid nitrogen biological container and a dry preparation method of the high-strength low-fat low-temperature heat insulation paper. The dry-method preparation method comprises the steps that raw materials of tencel fibers and viscose fibers are sequentially subjected to opening, carding, cross lapping, chemical reinforcement, drying and winding procedures to obtain the low-temperature heat insulation paper, the drying procedure is conducted through a drying cylinder with the surface subjected to fluorine coating and anti-sticking treatment, and no drying cylinder stripping agent or cylinder removing agent is used in the whole drying process. The raw material source and the production process are fundamentally controlled, breakthrough reduction of the grease content is achieved, the grease content of the finished paper can be stably controlled to be 0.40% or below, the grease content of the obtained product is remarkably reduced, and meanwhile the mechanical strength of the paper is greatly improved; the technical problems that a traditional product is insufficient in strength and prone to being damaged are successfully solved, the harsh requirement of a high-end liquid nitrogen biological container for the performance of a heat insulation material is comprehensively met, and a key material guarantee is provided for the lifelong high vacuum degree of the liquid nitrogen container.

The invention discloses a portable liquid nitrogen replenishment device of a single crystal diffractometer, and relates to the technical field of liquid nitrogen replenishment device.The portable liquid nitrogen replenishment device comprises a bottom plate and a liquid nitrogen container, a fixing frame is fixedly connected to the upper end of the bottom plate, a moving assembly is arranged on the outer side of the fixing frame, a fixing plate is fixedly connected to the outer side of the fixing frame, and a fixing assembly is arranged in the fixing plate; according to the portable liquid nitrogen supply device of the single crystal diffractometer, the whole device can be lifted and carried through the arranged straps, the telescopic rod is pulled out through the pull rod, and under the action of the universal wheels, the portable liquid nitrogen supply device is convenient to move and carry; due to the fact that the fixing pipe is connected with the two sets of connecting ports respectively, liquid nitrogen supply for the diffractometer is conducted in sequence without interruption, the problem caused by insufficient supply coherence is avoided, and the efficiency of the supply device is improved.

The application provides a natural gas recovery device and method, which comprises a vacuum adiabatic container, a liquid nitrogen container, a heat exchanger, a spraying pipe and a cryogenic pump, and the natural gas flowing into the recovery device is liquefied, and the liquefied natural gas is output from the recovery device by using the cryogenic pump, so that the liquefied natural gas is recycled. The natural gas recovery device and method provided by the application can significantly reduce the consumption of LNG in the replacement and cooling process of the fuel tank; the device uses low-cost liquid nitrogen as a cold source, and under the premise of meeting the LNG filling of the fuel tank, the cost is greatly saved; in addition, the recovery device has a simple structure, a low construction cost and is easy to be widely promoted.