64 results about "Freezing methods" patented technology

The invention belongs to the technical field of cell cryopreservation, and relates to a cryopreservation method based on ultrasonic ice planting. In the method, the nucleation temperature of ice planting is less than-9 DEG C, and the cooling rate from nucleation to icing is less than 5 DEG C / min. Compared with the prior art, the method has the advantages that the time required for cryopreservation of the cells is remarkably shortened, meanwhile, damage to the cells caused by ice crystals generated in the cooling process is reduced, and the problem that an existing cell cryopreservation cooling method cannot meet the nucleation and freezing uniformity of a cell solution in the cooling process is solved.

The invention provides an anchor-plate-injection collaborative supporting method for active water sealing. The anchor-plate-injection collaborative supporting method is applied to various laneways penetrating through water-containing stratums, especially to construction of vertical shafts constructed through a freezing method. During freezing method construction, a freezing wall is formed firstly, a section height is excavated, an anchor rod is drilled and constructed after the section height is excavated, and if water exists after excavation, forced drainage needs to be carried out to enable the displacement to be larger than the water inflow so as to ensure that no accumulated water exists on a working face; the steel plates are fixed through anchor rods, so that grouting gaps are formed between the steel plates and the well wall; a gap between the bottom edge of the steel plate and the well side is blocked by a certain height through foam; grout is injected through a grouting pipe on the lower portion of the steel plate, and a primary supporting structure is formed after solidification; secondary and more supporting can be carried out immediately or after primary supporting of multiple section heights is formed, and a permanent supporting structure is formed. A traditional passive waterproof mode is broken through, and active water plugging can be achieved; the method adapts to various construction methods and stratums; the temporary support is essentially different from a traditional anchor-shotcrete net temporary support, and the construction efficiency is higher.

The invention provides a cryopreservation and resuscitation method for induced differentiation of pluripotent stem cells to metaphase cells and application, and the cryopreservation method comprises the following steps: (1) the initial cells are pluripotent stem cells, and are induced and differentiated to the metaphase; (2) recovering the cells by using a mild digestive enzyme, counting, and resuspending the cells in a cryopreservation solution; and (3) carrying out programmed cooling to-80 DEG C, and then transferring into liquid nitrogen for preservation for later use. According to the cryopreservation method and the cryopreservation liquid provided by the invention, the cryopreservation survival rate of the differentiated metaphase cells is obviously improved, apoptosis or irreversible stress injury induced by a traditional cryopreservation liquid is avoided, and the problems of large cell injury and low survival rate caused by using a general cryopreservation liquid in the prior art are obviously improved. The resuscitated cells keep good differentiation potential, can smoothly form a mature renal unit structure, and solves the problem of subsequent differentiation failure in the prior art.

The invention discloses a freezing design method for an inclined shaft freezing crossing strong permeable pebble bed, and particularly relates to the technical field of freezing method construction. Acquiring rock and soil parameters and regional historical environment temperature of a pebble bed of a crossing section of the target inclined shaft; establishing a three-dimensional inclined shaft geometric model, and determining the arrangement position, inclination angle and spacing of the freezing pipe along the axis of the inclined shaft; constructing a frozen region space model coupled with the pebble bed; the method comprises the following steps: constructing a freezing-heat transfer-seepage multi-field coupling model according to historical environment temperature and freezing pipe arrangement information, performing numerical simulation on a frozen body forming process, and obtaining an evolution function of a freezing boundary expansion range and a freezing thickness at different times; according to the method, multi-physical field coupling modeling and freezing body evolution accurate control of the freezing process can be achieved, and the method has the advantages of being high in predictability, uniform in freezing effect and the like and is particularly suitable for inclined shaft freezing design and construction under complex geological conditions.

The invention discloses a fluid-solid coupling rock mechanics test device for simulating freezing method construction borehole wall stability, which comprises an experiment box body, a freezing pipe is vertically arranged in the middle in the experiment box body, the interior of the freezing pipe is used as a construction area, and a geotechnical material is filled in an area outside the freezing pipe in the experiment box body to serve as a water-bearing layer. The top of the freezing pipe is connected with the refrigerating system, one side of the experiment box is provided with the tide simulation device, the water supply system is connected with the experiment box and the tide simulation device, and the monitoring system is connected with the experiment box. The device can simulate the tide seepage state and monitor the stability of the well wall in real time, can provide more accurate mechanical parameters for freezing method construction on the basis of the fluid-solid coupling rock mechanics principle, and improves the reliability and efficiency of engineering design.

The application provides a freezing and recovery method and application of pluripotent stem cell induced differentiation middle stage cells, and the freezing method comprises the following steps: (1) the starting cells are pluripotent stem cells, which are induced to the middle stage; (2) the cells are recovered and counted by using a mild digestion enzyme, and the cells are resuspended in a freezing solution; (3) after programmed cooling to-80 DEG C, the cells are transferred into liquid nitrogen for storage, and are ready for use. The freezing method and the freezing solution provided by the application significantly improve the freezing survival rate of the differentiation middle stage cells, avoid the apoptosis or irreversible stress damage induced by the traditional freezing solution, and obviously improve the problems of cell damage and low survival rate caused by the general freezing solution in the prior art. The differentiation potential of the recovered cells is good, and the cells can successfully form mature kidney unit structures, so that the problem of subsequent differentiation failure in the prior art is solved.

The application discloses a kind of along empty roadway short working face coal seam floor high pressure water freezing outburst prevention control method, belong to coal underground mining floor water inrush prevention technical field, comprising the following steps: S1: determine the process parameters of freezing method, and the high pressure water of coal seam floor is detected;S2: first mining area is arranged;S3: excavate freezing chamber and install freezing equipment;S4: construction extends to aquifer freezing borehole;S5: install freezing pipeline and carry out freezing operation;S6: floor high pressure water is pumped out;S7: hydrologic observation borehole is constructed in along empty roadway floor;S8: first working face is mined and excavates second working face recovery roadway;S9: excavate second working face freezing chamber and construction freezing borehole;S10: freezing equipment completes relocation operation before first working face stop mining;S11: repeat S5 to S10 step realizes mining area working face safe mining.The application has the advantages that: it is favorable to improve the production efficiency of mine, and the safety of production is guaranteed.

The invention belongs to the technical field of nuclear power plant pipeline freezing, and discloses a multi-jacket liquid nitrogen ice plug freezing method for nuclear power plant pipeline maintenance, the configuration parameters of ice plug jackets are determined according to pipeline parameters, and the jackets are arranged in a series connection or parallel connection mode to realize freezing; the total length recommendation value of the jackets is obtained according to the pipe diameter checking standard, after the total length is determined, the number of the jackets and the length of gaps are calculated, the gaps are distributed, and when the parallel ice plug jacket mode is adopted, the length of the jackets of all branches is determined according to the branch pipe diameter checking standard by adding the branches, and the number and the pipe diameter of the branches are configured. The freezing time of the ice plug is shortened, meanwhile, the size of the closed ice plug is increased, the freezing efficiency is improved, and energy conservation and efficiency improvement are achieved.

The invention discloses a magnetic field auxiliary circulating liquid microcrystal freezing system which comprises a refrigerator body, a magnetic field generator is arranged in the refrigerator body, the magnetic field generator is connected with a transformer through an external control port, the magnetic field generator comprises two symmetrically-arranged coils, and a freezing liquid groove is formed between the two coils. A sample tank is placed in the refrigerating fluid tank, refrigerating fluid is contained in the refrigerating fluid tank, the refrigerating fluid tank is connected with an electric self-priming diaphragm pump through a refrigerating fluid circulating pipe and a silica gel hose, and thermocouple temperature measuring equipment is arranged beside the magnetic field generator. According to the invention, the sample is accurately regulated and controlled to enter a supercooled metastable state, and uniform and fine ice crystals can be formed in the food sample in combination with uniform alternating magnetic field auxiliary crystallization generated by the symmetrical coil, so that the mechanical damage of the ice crystals to food cells is greatly reduced.

The invention discloses an electric energy meter data freezing method and an electric energy meter data freezing system for decentralized freezing based on a special data container. The method comprises the following steps of: copying data of all freezing data types required in the special data container from one type of cache to the special data container at the freezing moment; querying a freezing type demand at the current moment, and setting a corresponding bit in the bitmap according to the freezing type demand at the current moment; sequentially querying the bitmap according to bits in a set period, if the bits are set, extracting corresponding frozen data from the special data container according to the frozen data type required by the freezing type corresponding to the bits, writing the corresponding frozen data into the nonvolatile memory, and resetting the bits; after the Nth set period, stopping bitmap query, clearing the bitmap, and waiting for the next freezing moment; n is the number of defined freezing types, and the set period time * N is smaller than the minimum freezing period. According to the method, system jamming caused by writing a large amount of frozen data into the nonvolatile memory at the freezing moment can be avoided.

The invention relates to the technical field of coal mine shaft construction, in particular to an active thermal insulation control method under the freezing method construction condition. Comprising freezing holes formed in the periphery of a shaft, heat insulation holes and temperature measurement holes located between a derrick foundation and the freezing holes, a heat preservation plate pasted outside the derrick foundation, and a temperature, pressure and deformation monitoring system. The method comprises the following steps: starting independent liquid circulation of a freezing hole and a thermal insulation hole, starting a monitoring system, and collecting multi-source real-time data such as temperature, pressure and deformation in real time; inputting the data into a preset data fusion and intelligent prediction control system, and predicting the frost heaving deformation trend of the future derrick foundation through a built-in prediction model; and according to the prediction result, the liquid inlet temperature and flow of the thermal insulation hole are dynamically adjusted. According to the invention, the conversion from passive thermal insulation to active prediction and intelligent regulation is realized, the safety of the derrick foundation can be effectively protected, and the frost heaving hazard is reduced.

The present invention discloses a common orifice device and construction method for drilling holes using the MJS construction method and the freezing construction method for a connecting channel. The common orifice device for drilling holes using the MJS construction method and the freezing construction method for a connecting channel includes an MJS construction orifice pipe, the first end of which is inserted into a tunnel segment and fixedly connected to the tunnel segment, and the inner diameter of the MJS construction orifice pipe matches the diameter of the MJS drill rod; a flange is fixedly connected to the second end of the MJS construction orifice pipe, and the flange on the second end of the MJS construction orifice pipe is detachably fixedly connected to a guard plate via bolts, and the freezing construction orifice pipe is fixedly connected to the guard plate. The first end of the freezing construction orifice pipe is coaxially inserted into the MJS construction orifice pipe, and the inner diameter of the freezing construction orifice pipe matches the diameter of the freezing drill rod. By installing the guard plate and the freezing construction orifice pipe on the MJS construction orifice pipe, the MJS construction method drilling hole position is utilized when drilling the freezing hole, which can effectively reduce the number of holes opened in the tunnel segment.

The invention discloses a radio frequency assisted freezing system which comprises a radio frequency generation module, a radio frequency processing module, a low-temperature freezing module and an optical fiber temperature measurement module, the radio frequency generation module can provide stable pulse radio frequency signals and comprises a radio frequency generator, a relay pulse generator and an impedance matcher, and the relay pulse generator and the impedance matcher are electrically connected with the radio frequency generator. The radio frequency processing module is used for providing a radio frequency action space for food and comprises a radio frequency processing device, the low-temperature freezing module can provide freezing cooling capacity for the system and comprises a low-temperature refrigerator, the impedance matcher and the radio frequency processing device are arranged in the low-temperature refrigerator, and the optical fiber temperature measuring module is arranged on the outer side of the low-temperature refrigerator; and the optical fiber temperature measurement module is used for accurately monitoring the food temperature. Through the synergistic effect of the radio frequency field and low-temperature freezing, the crystallization process of water molecules in the food can be effectively interfered, the food is promoted to generate an obvious supercooling phenomenon, a large number of ice nucleuses are formed at the temperature lower than the freezing point in an explosive mode finally, and the final quality of the frozen food is greatly improved.

The utility model discloses a device for simulating dynamic seepage in freezing method construction, relates to the field of urban rail transit construction and underground engineering construction, and aims to solve the problem that the dynamic change of underground water seepage cannot be accurately simulated in the conventional freezing method construction technology. The simulation device can accurately reproduce the seepage direction and flow change of underground water, the device is composed of a base, a first organic glass plate, a second organic glass plate, a fixed side plate, a movable side plate and a top plate, the base is fixedly connected with the first organic glass plate and the second organic glass plate, and the fixed side plate is flexibly adjusted through the movable side plate in sliding fit. The top plate is located above the side plates, the sealing performance and stability of the whole structure are ensured, a flow dividing mechanism is installed on one side of the device, the seepage direction and flow can be accurately adjusted according to needs, meanwhile, the device is provided with an extrusion assembly, and stress environments borne by soil bodies under different burial depths are simulated by applying vertical pressure of different degrees.

The invention particularly relates to a multi-jacket liquid nitrogen ice plug freezing method using a non-uniform gap structure, and belongs to the technical field of nuclear power plant pipeline freezing, and the method comprises the following steps: step 1, determining the total length L1 of jackets and the number N of the jackets of a pipeline freezing section; 2, calculating the value range of the total gap length L2 of the jacket of the frozen section of the pipeline; and step 3, designing and distributing non-uniform gaps. By designing the non-uniform jacket gaps, energy regulation and control are carried out in the ice plug forming process, so that the initial freezing position is accurately controlled, the complete freezing time is shortened, the pressure bearing capacity of the ice plug is improved, and finally energy conservation and efficiency improvement are achieved.

The invention relates to a freezing medium and a freezing method for universal CAR (chimeric antigen receptor) cells. The cryopreservation liquid comprises a compound electrolyte injection, a human serum albumin injection, a sodium chloride injection, a dextran 40 glucose injection, a glucose injection, dimethyl sulfoxide and trehalose. The cell cryopreservation process is deeply analyzed, the specific cell cryopreservation liquid and the cryopreservation method are designed, all the components of the cryopreservation liquid are synergistic, the cryopreservation liquid can adapt to the specific cooling process, cell damage in the cryopreservation process is effectively reduced, the activity of the cryopreserved cells is effectively kept, the cryopreservation liquid can be directly used for reinfusion of patients, a specific sectional programmed cooling program is adopted, and the cell cryopreservation process is simplified. The cell cryopreservation device can further adapt to different cryopreservation volumes, so that the cryopreservation effect is further improved, the survival rate of cells is effectively guaranteed, and the cryopreserved cells still keep good cell activity.

The invention discloses a large yellow croaker semen super-long-time preservation and liquid nitrogen re-freezing method based on a dry ice medium, and solves the problems that existing liquid nitrogen preservation and transportation are limited, dry ice preservation time is short, and liquid nitrogen long-term preservation cannot be linked. The method comprises the following steps: firstly, mixing seminal fluid with a sperm diluent containing specific components and a cryopreservation solution in proportion, balancing at 4 DEG C for 15 minutes, sub-packaging and embedding into dry ice for preservation; the cryopreserved seminal fluid can be directly recovered for use or put into liquid nitrogen for re-freezing for long-term preservation. According to the method provided by the invention, the sperm motility is still up to 90% or above after the sperm is preserved in dry ice for 72 hours, and the unfrozen sperm motility can still be kept at 80% or above after the sperm preserved in the dry ice is subjected to liquid nitrogen re-freezing preservation. According to the method, the difficult problem of safe and convenient ultra-long distance dry ice transportation of the seminal fluid is successfully solved, seamless connection of dry ice long-distance transportation and liquid nitrogen permanent preservation is realized for the first time, and a powerful technical support is provided for large yellow croaker cross-regional germplasm resource collection, preservation, improved variety breeding and industrial sustainable development.

The present invention relates to the technical field of deep underground space stratum reinforcement, and particularly to a CO2 transcritical freezing system and freezing method. The system comprises: a freezing subsystem comprising a first liquid intake pipe and a first liquid return pipe which are arranged on the ground and are configured to convey low-temperature liquid CO2 to the stratum for stratum freezing construction; a liquefaction subsystem for compressing the volume of normal-temperature gaseous CO2, such that the movement of molecules between the gaseous CO2 is restricted and reduced, and the gaseous CO₂ is converted into low-temperature liquid CO2; and an intake and return pipeline subsystem. CO2 media used in the present invention effectively solves the problems of flammability and explosibility, high risk and difficulty in treatment, environmental pollution, etc., caused by liquid ammonia and brine used in traditional freezing construction. Further, a water-bearing stratum, a weak stratum, etc., are frozen and reinforced by means of compression-converted low-temperature liquid CO2 to form a water-proof stratum and a temporary support, thereby effectively preventing seepage of water and sinking, displacement and collapse of a wall surface and a bottom plate, and improving the stability of a frozen area to be excavated.

The invention belongs to the technical field of wine making, and discloses a concentrated wine making method of liquid fermented wine, which comprises the following steps: according to different concentration requirements, adopting a freezing cabin (chamber) freezing mode, a freezer immersion freezing mode, a freezing container low-position (bottom-position) freezing mode and a liquid inert gas injection bottom-position freezing mode; the environment temperature, the temperature of the freezer or the temperature of the bottom of the freezing container reach the freezing point of the needed alcohol content, meanwhile, the alcohol content is monitored through an alcohol content sensor in combination with a manual monitoring mode, and finally the wine with the needed concentration is obtained. The invention discloses a novel method for concentrating liquor in the field of spirit brewing. In the concentration process, more fruit fragrance, grain fragrance, color and nutritional ingredients of the wine making raw materials can be reserved; according to component retention requirements, the liquor is subjected to liquid stabilization and filtration at different temperatures, and components needing to be retained or filtered out can be accurately controlled; and novel wine products can be directly produced, and the concentrated wine liquid prepared by freezing can also be used as blended wine of distilled wine, so that wine products with richer fragrance and content can be produced.

The invention relates to the technical field of underground engineering drill rods, in particular to a drill hole deflection measurement and control device for freezing method construction. According to the technical scheme, the anti-swing drill rod comprises a drill rod body, a drill bit is installed at one end of the drill rod body, the anti-swing drill rod further comprises an anti-swing structure arranged at the end, close to the drill bit, of the drill rod body in a sleeving mode, the anti-swing structure comprises a frame, and a plurality of locking mechanisms enabling the anti-swing structure to be fixed to the drill rod body are arranged on the frame. Through cooperation of an anti-swing structure, a rotating mechanism, an opening and closing mechanism, a synchronizing mechanism and other structures, when the anti-swing device is adjusted according to the actual aperture, a rotating disc drives a two-way screw to rotate, and a driving block drives a driving arm to change the angle, so that a supporting plate moves to adapt to the aperture; the measuring rod ensures consistent moving distance of the supporting plate; the round bar and the round tube limit the path of the support plate. The problem that traditional equipment cannot adjust hole diameter changes in a self-adaptive mode is solved, the supporting effect is guaranteed, and the construction cost and the construction period delay risk are reduced.

The invention discloses a freezing method construction three-dimensional stress strain-temperature integrated sensor and a measuring method. The sensor comprises a regular tetrahedron framework formed by six rigid rods, and a temperature measuring unit and a strain measuring unit which are respectively arranged in a rod piece, the periphery of the fiber bragg grating area of the strain measurement unit is coated with a heat insulation material, the periphery of the fiber bragg grating area of the temperature measurement unit is coated with a heat conduction material, and temperature and strain are detected in a distinguished mode by measuring Bragg wavelength changes. The measuring method comprises the steps of sensor arrangement, wavelength signal collection and parameter calculation, and three-dimensional stress, strain and temperature data of the soil body in the freezing construction process can be synchronously obtained with high precision. The problems that a traditional discrete sensor is low in integration level, asynchronous in data, poor in environmental adaptability and the like are solved, the device has the advantages of being compact in structure, rapid in response, high in anti-interference performance and the like, and the safety monitoring efficiency and reliability of freezing method construction are remarkably improved.

The invention discloses a quick-freezing and control method for catches by using dipping type quick-freezing equipment, the quick-freezing equipment comprises an identification module, a circulation module and a quick-freezing module, the quick-freezing module comprises a quick-freezing bin and a dipping goods shelf, and the quick-freezing method comprises the following steps: uniformly laying catches on the dipping goods shelf; the recognition module recognizes and obtains fishing information, and then the dipping goods shelf is sent into the quick-freezing bin for dipping and quick-freezing; the circulating module adjusts the circulating flow of the refrigerating fluid according to the fishing information, and the quick-freezing module adjusts the quick-freezing time according to the obtained fishing information; and after the quick freezing is finished, the dipping shelf is moved away, and the quick-frozen catches are transferred out for frozen storage. According to the method, the quick-freezing parameters can be controlled according to the fishing information, and the quick-freezing time and the circulating flow of the secondary refrigerant are specifically controlled, so that the influence of the flow of the secondary refrigerant on the liquid inlet of the quick-frozen product and the quick-freezing efficiency are balanced, and the enough refrigerating capacity and action time of the secondary refrigerant are guaranteed.

The invention relates to the field of building construction, and discloses a hydrological hole stop-grouting plug, which comprises a stop-grouting unit which is telescopically arranged on a freezing pipe in a sleeving manner and is used for sealing a gap between the freezing pipe and a hydrological hole; the adjusting unit is arranged on the grout stopping unit; the grouting stopping unit comprises a top support arranged on the freezing pipe in a sleeving mode, intercepting cloth arranged on the outer side of the top support and an adjusting assembly arranged on the top support, connected with the intercepting cloth and used for controlling the intercepting cloth to be opened. Concrete falling into the hydrological hole can be effectively intercepted, it is ensured that grout is fully solidified in a limited area, the problem that the grout cannot be cemented due to the fact that high-flow-speed underground water disperses the injected concrete grout is solved, and the concrete grout cannot sink to the lower portion of the annular space to block the floral tube due to the gravity or water flow scouring effect; and the risk that concrete grout blocks the hydrological hole floral tube section is reduced.

The anti-freezing control device comprises a freezing condition parameter detector capable of detecting a freezing condition parameter indicating whether ice may be attached to a filter in an intake duct, a pressure difference gauge capable of detecting a pressure difference within the intake duct, which is the difference between the pressure upstream of the filter and the pressure downstream of the filter, and a control device main body capable of indicating one of a heating state in which the filter is heated and a non-heating state in which the filter is not heated, for a filter heating device capable of heating the filter according to the freezing condition parameter and the pressure difference.

The invention discloses energy-saving type minced fillet product quick-freezing equipment, and belongs to the technical field of quick-freezing equipment.The energy-saving type minced fillet product quick-freezing equipment comprises a box body, a feeding port is formed in one side wall of the box body, a discharging port is formed in the other side wall of the box body, a conveying belt is installed on the box body, mesh trays are evenly placed on the conveying belt, and the mesh trays are arranged on the conveying belt; the width of the mesh tray is larger than that of the conveying belt, a liquid nitrogen pipeline is connected to the top wall of the box body, one end of the liquid nitrogen pipeline extends into the box body to be connected with a spraying assembly, an electromagnetic valve is installed on the spraying assembly, an exhaust pipe is connected to the bottom of the side wall of the box body, and a pressure balance valve is installed on the exhaust pipe. Through the mesh tray lifting design, the bottoms of surimi products are completely exposed, and through cooperation with control of intermittent conveying, spraying according to needs and spraying stopping buffering, up-down synchronous cooling is achieved, and the quick-freezing period is shortened; and the liquid nitrogen consumption is reduced, the frost layer generation is reduced, the defrosting energy consumption is obviously reduced, and the dual energy-saving effect is prominent.

The invention relates to a quick-freezing chamber, refrigeration equipment and a quick-freezing method.The quick-freezing chamber comprises a steam enzyme deactivation chamber, a moisture absorption assembly, a heating assembly, a quick-freezing chamber and a partition plate assembly, a moisture absorption opening is formed in the side wall of the steam enzyme deactivation chamber, and the moisture absorption assembly is arranged at the moisture absorption opening and used for absorbing moisture outside the steam enzyme deactivation chamber; a heating assembly is arranged in the steam enzyme deactivation chamber and is used for releasing moisture adsorbed on the moisture absorption assembly into the steam enzyme deactivation chamber to form high-temperature steam; the quick-freezing chamber is integrally arranged below the steam enzyme deactivation chamber, and a communication port is formed between the quick-freezing chamber and the steam enzyme deactivation chamber; the partition plate assembly is movably arranged at the communicating opening and used for opening and closing the communicating opening. According to the quick-freezing chamber, high-temperature enzyme deactivation treatment is achieved by wrapping the food materials with the high-temperature steam, loss of a large amount of nutrient substances in the food materials and generation of wastewater treatment cost cannot be caused, and the manual labor cost and the equipment cost can be effectively reduced while seamless connection of enzyme deactivation treatment and quick-freezing treatment is achieved.

The utility model discloses a variable-diameter template for freezing method vertical shaft construction, which relates to the technical field of vertical shaft construction and comprises a plurality of first arc-shaped modules, the first arc-shaped modules are arranged on two sides of a second arc-shaped module, and the second arc-shaped module and the first arc-shaped modules are encircled to form a cylindrical barrel. The hydraulic driving assembly is arranged between the multiple first arc-shaped modules, the variable-diameter adjusting mechanism is arranged between the multiple first arc-shaped modules and between the first arc-shaped modules and the second arc-shaped modules, and the sealing structures are arranged between the multiple first arc-shaped modules and between the first arc-shaped modules, the second arc-shaped modules and the variable-diameter adjusting mechanism; according to the variable-diameter formwork for freezing method vertical shaft construction, sealing of the splicing position of the formwork after diameter changing can be achieved, so that the slurry leakage phenomenon at the splicing position during grouting is avoided, pollution to the construction environment is avoided, and the construction quality of a vertical shaft is ensured.

The present application relates to the technical field of deep underground space stratum reinforcement, and particularly relates to a CO2 transcritical freezing system and freezing method, comprising: a freezing subsystem, comprising a first liquid inlet pipe and a first liquid return pipe arranged above the stratum, used for conveying low-temperature liquid CO2 to the stratum to perform stratum freezing construction; a liquefaction subsystem, used for compressing the volume of normal-temperature gaseous CO2, so that the motion of molecules in the gaseous CO2 is limited and reduced, and the gaseous CO2 is converted into low-temperature liquid CO2; and an inlet and return pipe subsystem. The CO2 medium used in the present application effectively solves the problems of flammability, high risk, difficulty in handling and environmental pollution caused by liquid ammonia and salt water used in traditional freezing construction; and the low-temperature liquid CO2 converted by compression is used to freeze and reinforce the aquifer and soft stratum, to form a water-resisting layer and temporary support, effectively preventing water seepage and the sinking, displacement and collapse of the wall surface and the bottom plate, and improving the stability of the freezing area to be excavated.

The invention relates to the technical field of data processing, discloses a digital resource freezing method and device, equipment and a medium, and is used for solving the problem that a current freezing-related business process cannot comprehensively cover a freezing-related business range in digital resources. The method comprises the following steps of: after a freezing instruction of a freezing service is received, acquiring a residual prepayment resource value corresponding to a target account identifier according to the target account identifier by identifying the target account identifier carried in the freezing instruction, a freezing resource value corresponding to the target account identifier and a freezing service type of the freezing service; determining the priority corresponding to the frozen service based on the frozen service type of the frozen service in the freezing instruction, so as to determine the freezing effective state of the frozen service based on the frozen resource value, the residual prepayment resource value, the priority corresponding to the frozen service and a preset waiting rule; and based on the freezing effective state, freezing processing is carried out on the freezing service, so that the integrity of the digital resource freezing service function is ensured.

The application discloses a vehicle invisible door handle unfreezing method, a vehicle invisible door handle unfreezing device, a vehicle invisible door handle unfreezing system, an electronic device and a storage medium. The method comprises the following steps: receiving a handle protruding instruction; determining whether the handle is retracted in a handle hiding area according to the received handle protruding instruction; if the handle is retracted in the handle hiding area, determining whether there is low-temperature frozen matter between the handle and the handle hiding area; if there is low-temperature frozen matter, the handle is in a frozen state, and an ice breaking step is started; determining whether the ice breaking step is ended; if the ice breaking step is ended, the handle protruding instruction is executed; wherein the ice breaking step comprises the following steps: melting or / and breaking the low-temperature frozen matter between the handle and the handle hiding area and synchronously pushing the handle to protrude out of the handle hiding area. Through the above scheme, the bimetallic strip is deformed by temperature rise, accompanied by the inhibition of the surrounding temperature rise, forming a synchronous effect of mechanical deformation and melting of low-temperature frozen matter.