9713results about "Container filling methods" patented technology

The invention discloses an enclosure system of a low-temperature storage tank and transportation equipment, and relates to the technical field of fluid transportation, the enclosure system is installed on the inner wall of the low-temperature storage tank, the enclosure system comprises a plurality of heat insulation modules installed on the inner wall of the storage tank, the heat insulation modules are spliced and cover at least part of the inner wall of the storage tank, and the heat insulation modules are arranged on the inner wall of the storage tank; assembling grooves are formed in the splicing positions of the heat insulation modules; the bridging blocks are installed in the assembling grooves, and every two adjacent heat insulation modules can be connected together through the corresponding bridging blocks; the shielding module is connected with the heat insulation module, the shielding module comprises a first shielding layer, a second shielding layer and a third assembly plate, the first shielding layer and the second shielding layer are arranged in a spaced mode, and the third assembly plate is located between the first shielding layer and the second shielding layer. According to the invention, a better shielding effect can be realized by arranging two or more shielding layers, and the first shielding layer and the second shielding layer are arranged at intervals, so that the capacitive coupling effect between the shielding layers is reduced, and the penetrating power of electromagnetic waves is reduced.

The invention provides an anchoring structure, a film system and a liquefied gas storage tank. The anchoring structure comprises a stud, a nut and a secondary layer anchoring plate. The film system comprises a main layer film, a main plywood, a secondary layer film and a secondary plywood. The secondary layer anchoring plate is connected to the upper portion of the secondary plywood, the secondary layer thin film is connected to the upper portion of the secondary layer anchoring plate, the first pressing plate arranged on the stud is pressed on the upper portion of the secondary layer thin film, the main plywood is arranged on the upper portion of the secondary layer thin film, the second pressing plate arranged on the stud is pressed on the upper portion of the main plywood, and the main layer thin film is arranged on the upper portion of the main plywood. And the nut is pressed above the main layer film, so that the film system is connected and fixed through the anchoring structure, and the connection strength of each layer in the film system is ensured. The area of the first pressing plate is larger than that of the first through hole, the area of the second pressing plate is larger than that of the second through hole, and the contact area of the nut and the main layer film is larger than that of the third through hole, so that the leakproofness of the film system is improved, and liquefied gas in the storage tank is prevented from leaking.

The invention relates to the technical field of low-temperature storage tank installation, in particular to a low-temperature storage tank heat insulation module installation construction method which comprises the steps that expansion bolts are implanted into preset point positions of the inner wall of a low-temperature storage tank, inner wall morphology data are obtained through three-dimensional laser scanning, and a point cloud model is generated. A BIM system is used for constructing a three-dimensional model of the installation datum plane, the theoretical leveling height of each expansion bolt point position is calculated, and a leveling parameter instruction set is generated. And a servo motor of the bolt tightening equipment is driven to rotate the ball nut, so that the leveling gasket moves to the target height. And a press-fitting path is generated, a press-fitting mechanical arm is controlled to align the preformed hole of the heat insulation module to the screw part of the expansion bolt and press-fit, and the surface of the heat insulation module is fully attached to the surface of the leveling gasket. And a fastening nut is installed on the screw part of the expansion bolt, three-dimensional deviation analysis is carried out, and iterative correction is carried out. Compared with the prior art, the effects of shortening the construction period, improving the leveling precision, reducing stress concentration, ensuring long-term stability and the like are achieved.

The invention discloses a liquid cargo containment system and a maintenance method, and belongs to the technical field of natural gas storage, the liquid cargo containment system comprises a main shielding layer, a secondary shielding layer, an insulating layer and a detection pipeline, one end of the detection pipeline is connected with a gas input pipeline, the other end of the detection pipeline is provided with a first branch pipe and a second branch pipe, and the first branch pipe extends between the main shielding layer and the secondary shielding layer; the first branch pipe extends into the insulating layer, the second branch pipe extends into the insulating layer, a first temperature monitoring unit is arranged in the first branch pipe, a second temperature monitoring unit is arranged in the second branch pipe, and a first pressure difference detection unit is further arranged between the first branch pipe and the second branch pipe. Through dual monitoring of the peripheral temperature and pressure of the thin film tank, accurate monitoring of the liquid cargo leakage condition is ensured, and the problem that the liquid cargo leakage condition is misreported due to pressure fluctuation caused by other factors in a conventional monitoring mode is solved.

The invention discloses a corrugated through type pump tower base and a mounting method thereof. The corrugated through type pump tower base comprises an upper structure and a lower structure, wherein the bottom of the upper structure is connected with the top of the lower structure; a groove is formed between the upper structure and the lower structure; the groove is formed in the circumferential direction of the bottom of the upper structure; the grooves are used for enabling shielding layer corrugations of the film storage tank to directly penetrate through, and the corrugations are located between the grooves and the top of the lower structure. The problem that the pump tower base interferes with the corrugation continuity can be solved.

The invention relates to the field of liquid air energy storage, and discloses a liquid air energy storage and liquefied natural gas coupling efficient power generation device and method. The method comprises the steps that an air liquefaction circulation loop purifies, compresses and cools ambient air and then expands and decompresses the ambient air to obtain liquid air, and the liquid air is transmitted to an air power generation circulation loop; generated air compression heat is stored in the heat storage unit; the air power generation circulation loop generates power through expansion of received liquid air, and generated cold energy is stored in a cold storage unit; the LNG vaporization supply loop pressurizes, evaporates and gasifies liquefied natural gas and then supplies the liquefied natural gas to a user side, generated cold energy is stored in a cold storage unit or directly supplied to the air liquefaction circulation loop, and meanwhile gaseous natural gas naturally released by an LNG tank is collected and conveyed to a combustion chamber. The high-grade heat energy utilization loop conducts heat conduction oil circulation, low-grade heat energy and high-grade natural gas combustion heat energy of the heat storage unit are recycled in sequence, high-grade heat energy is transmitted to the air power generation circulation loop, and heat conduction oil returns to the initial state to continue circulation after releasing the heat energy.

The storage tank comprises a wall and an internal containing space defined by the wall, the wall comprises a first layer assembly and a second layer assembly which are arranged in a stacked mode, the first layer assembly is located on the inner side of the second layer assembly, the first layer assembly comprises a first shielding layer and a first heat insulation module located on the outer side of the first shielding layer, and the second layer assembly comprises a second shielding layer and a second heat insulation module located on the outer side of the second shielding layer. The second layer assembly comprises a second shielding layer directly connected with the first heat insulation module and a second heat insulation module located on the outer side of the second shielding layer, the first shielding layer and the second shielding layer are both made of metal corrugated plates, and the metal corrugated plates are provided with crisscrossed corrugations. According to the storage tank, an invar plate is not adopted, the overall production cost is reduced, the problem of difficult supply is solved, the two layers of corrugated metal plates have good tensile strength, pressure caused by contents and airflow to the wall can be compensated, and the storage tank can keep good performance for a long time.

The invention discloses an underground gas storage prestress lining structure and a construction method, and relates to the technical field of underground gas storage, the underground gas storage prestress lining structure comprises a lining layer formed by concrete pouring and internally provided with prestress steel bars; the sealing layer is arranged on the inner side of the lining layer and defines a gas storage chamber; the sliding layer is arranged between the lining layer and the sealing layer. The arrangement of the prestressed reinforcements can counteract part of internal pressure of the gas storage, so that the problem of concrete cracking is relieved. The lining layer is divided into the first lining layer and the second lining layer, the tensioning notch is reserved in the bottom of the first lining layer and provides sufficient tensioning space for the prestressed steel bars, the tensioning effect of the prestressed steel bars is ensured, the second lining layer is formed in the tensioning notch in a pouring mode after the prestressed steel bars are tensioned, and the integrity of the lining layer is ensured. After the sealing layer is constructed, grouting is conducted on the gap between the lining layer and the sliding layer, it is guaranteed that grouting is compact and complete, stress concentration is reduced, and the problem of concrete cracking is further relieved.

The invention relates to the technical field of compressed air energy storage, in particular to a nitrogen constant-pressure and constant-pressure pressurized water energy storage system and a constant-pressure method. The system comprises an energy storage module, a constant-pressure and constant-pressure module and a water replenishing and pressure relief module. The energy storage module comprises a cold water tank, a heat exchange unit and a hot water tank which are connected, and the constant-pressure and constant-pressure module comprises a first pressure measuring instrument on the hot water tank, a nitrogen compressor connected with the cold water tank and the hot water tank and a pressure reducing valve set. The water replenishing and pressure relief module comprises a normal-pressure water tank connected with the cold water tank and a water drainage loop connected with the cold water tank and the normal-pressure water tank, and the pressure measuring unit further comprises a second pressure measuring instrument on the cold water tank. By controlling the nitrogen amount in the hot water tank, the pressure in the hot water tank is kept stable, so that the pressure fluctuation of the system is reduced, the reliability of the system is improved, and the cost of the pressurized water storage tank is effectively reduced.

The invention relates to a hot corner protection structure, a thin film enclosure system and a thin film enclosure construction technology. Comprising an upper heat insulation module, a lower heat insulation module, an embedded part, a secondary corrugated plate and an apron board. The upper heat insulation module and the lower heat insulation module are arranged on the inner wall of the outer tank in the vertical direction, a gap is formed between the upper heat insulation module and the lower heat insulation module, and main corrugated plates cover the outer sides of the upper heat insulation module and the lower heat insulation module. The embedded part is fixed to the inner wall of the outer tank and partially located on the side, close to the upper heat insulation module, of the gap. And the secondary corrugated plate is arranged between the lower heat insulation module and the main corrugated plate. The apron board is connected between the embedded part and the secondary corrugated plate and partially arranged on the side, close to the upper heat insulation module, of the gap. The embedded part, the apron board and the secondary corrugated board are sequentially connected to separate the gap from the main corrugated board, and second longitudinal corrugations are arranged on the apron board in the extending direction. According to the hot corner protection structure, the gap position of the thin film enclosure structure can be protected, and the possibility of leakage of the storage tank is reduced.

The invention provides a hydrogen leakage traceability system based on multi-source information coupling, and relates to the technical field of hydrogen refueling station safety management. In the hydrogen leakage traceability system provided by the invention, the first detection unit is used for collecting the pressure, flow and temperature of hydrogen at the gas inlet and the gas outlet of the hydrogen-contacting equipment, and the second detection unit is used for collecting the pressure, flow and temperature of hydrogen at the gas inlet and the gas outlet of each hydrogen refueling station pipeline; the first detection unit and the second detection unit transmit collected data to the control module, the processing unit is used for comparison based on a constructed hydrogen environment mechanism model, and information, corresponding to abnormal data existing in a comparison result, of the first detection unit or the second detection unit is transmitted to a displayer of a user. Therefore, the user can conveniently check the abnormal data in the hydrogen refueling station according to the corresponding information, and the speed of judging the hydrogen leakage point in the hydrogen refueling station by the user is improved.

The invention discloses a liquid cargo film tank leakage monitoring system and monitoring method, and belongs to the technical field of natural gas transportation and storage, the liquid cargo film tank leakage monitoring system comprises a plurality of first-level monitoring subsystems, the first-level monitoring subsystems are arranged in the circumferential direction of a film tank in a surrounding mode, and the first-level monitoring subsystems are communicated through pipelines; the protective gas input end and the gas output end are connected with each primary monitoring subsystem through pipelines; each primary monitoring subsystem comprises two gas sensing parts, the gas sensing parts are attached to the outer wall of the thin film tank, and a first pressure difference detection mechanism is arranged between the two gas sensing parts. According to the system, the primary monitoring subsystems are arranged on all the faces of the thin film tank, the pressure of all the areas of the thin film tank is monitored through the secondary monitoring subsystems, and accurate monitoring of natural gas leakage point positions is achieved; and gas input and extraction are performed on the fixed-point area of the thin film tank through the protective gas input end and the gas output end, natural gas leakage suppression at the leakage point is achieved, and the natural gas leakage problem is effectively relieved.

An apparatus includes a Dewar having an endcap. The apparatus also includes a heat sink and a multiaxial thermal shoe having a thermal interface material and configured to thermally couple the endcap of the Dewar to the heat sink via one of at least two axial surfaces. The multiaxial thermal shoe is configured to transfer thermal energy between the endcap of the Dewar and the heat sink without structurally coupling the Dewar to the heat sink. The multiaxial thermal shoe may be configured to hold the thermal interface material against the endcap. The multiaxial thermal shoe may couple to the heat sink via a first axial surface in-line with an optical centerline or a second axial surface crosswise to the optical centerline.

The invention discloses a multi-hydrogen-storage-tank solid hydrogen storage system based on temperature control, and relates to the technical field of hydrogen energy storage, and the key points of the technical scheme are that the system comprises a plurality of hydrogen storage tanks, each hydrogen storage tank adopts different types of alloy hydrogen storage materials, each hydrogen storage tank is provided with an independent temperature control system, and the temperature is adjusted according to the types of the hydrogen storage materials; therefore, the hydrogen storage efficiency is optimized. The system can accelerate the hydrogen storage rate and improve the storage density through temperature control, the heat exchange device is arranged to improve the heat energy management efficiency, and accurate temperature control and cycle counting functions are achieved. The service life of the hydrogen storage material can be effectively prolonged, performance degradation is reduced, and the long-term stability of a hydrogen storage system is improved.

A compressed gas supply system comprises at least one tank (2) for highly compressed gas, a tank-side shut-off device (4), and a first sensor group comprising a first pressure sensor (10) and a first temperature sensor (11). The pressure sensor (10) and the temperature sensor (11) are arranged on a line (3, 8) extending from a side of the tank-side shut-off device (4) facing away from the tank (2) to a consumer-side shut-off device (7, 16).

The invention relates to a hot corner protection structure and a thin film enclosure system, and relates to the technical field of thin film enclosure systems. Comprising a heat insulation module, a main corrugated plate and an embedded part. The heat insulation module is arranged on the inner wall of the outer tank body and comprises an upper heat insulation module and a lower heat insulation module, and a gap is formed between the upper heat insulation module and the lower heat insulation module. The main corrugated plate is arranged on the side, away from the inner wall of the outer tank body, of the heat insulation module and covers the upper heat insulation module and the lower heat insulation module at the same time. The embedded part is fixed on the inner wall of the outer tank body. And the secondary corrugated plate is arranged between the lower heat insulation module and the main corrugated plate. The apron board is connected between the embedded part and the secondary corrugated plate and partially arranged on the side, close to the upper heat insulation module, of the gap. Wherein the embedded part, the apron board and the secondary corrugated plate are sequentially connected and define a sealing cavity, and the gap and the main corrugated plate are arranged on the inner side and the outer side of the sealing cavity respectively. The hot corner protection structure can solve the problem that in the prior art, the boundary position of a thin film enclosure system is prone to leakage.

The invention discloses a marine low-pressure carbon dioxide tank pressure control method and system, and relates to the technical field of storage tank pressure control, and the method comprises the steps: obtaining real-time pressure data in a low-pressure carbon dioxide tank, and extracting pressure feature data; analyzing the pressure characteristic data by using a pressure diagnosis algorithm, and identifying key factors influencing the pressure stability in the low-pressure carbon dioxide tank; based on the key factors, a pressure regulation and control model is established, pressure parameters of the low-pressure carbon dioxide tank are adjusted in real time, and a control strategy is optimized. According to the method, key factors are analyzed by using a pressure diagnosis algorithm, so that accurate pressure regulation is realized, the stability of the internal pressure of the storage tank is improved by establishing an optimization model and adjusting pressure parameters in real time, the risk of carbon dioxide state change caused by pressure fluctuation is reduced, and the operation safety of a ship is ensured.

The invention discloses a hydrogen supply and energy storage device which comprises a hydrogen storage tank body, a gaseous hydrogen storage tank is installed in the hydrogen storage tank body, a liquid hydrogen storage tank is installed on the hydrogen storage tank body, a supporting plate is fixedly connected to the hydrogen storage tank body, and a cooling liquid storage box is installed at the top end of the supporting plate. A transverse plate is fixedly connected to the side wall of the cooling liquid storage box, metal cooling fins are arranged on the side wall of the transverse plate, and the cooling device further comprises a cooling circulation assembly and an air blowing cleaning assembly. A motor drives a first sector gear to rotate, the first sector gear is alternately engaged with a transmission gear and a driven gear, so that a rotating shaft drives metal heat dissipation fins to rotate for heat dissipation, and meanwhile, the driven gear drives cooling liquid to circularly flow in a sealing pipe, a cooling pipe and a liquid inlet pipe through a connecting rod and a piston rod; and cold airflow generated by the fan is used for dissipating heat of the hydrogen conveying pipe, so that the heat dissipation effect is improved.

The invention discloses a liquefied natural gas (LNG) early warning system and method for dynamically monitoring an LNG ship, and the method comprises the steps: collecting the output amount, cabin pressure, environment temperature and pump operation parameters in real time, combining a multi-factor correction model to dynamically calculate the actual evaporation rate, and reversely setting an allowable evaporation rate threshold according to the maximum capability of a BOG processing system; the evaporation rate is ensured to be within a safe range through a grading alarm mechanism and safety regulation and control measures; the problem that in the prior art, static testing cannot reflect evaporation rate changes in real time is solved. Liquefied natural gas whole life cycle monitoring and performance degradation early warning of the LNG ship are achieved.

The utility model provides a vehicle-mounted liquid hydrogen storage tank and a vehicle, and relates to the field of vehicle engineering technology. The vehicle-mounted liquid hydrogen storage tank comprises: a tank body and a spiral rib installed inside the tank body, and the outer ring of the spiral rib is welded to the tank body. Compared with welding multiple baffles separately, the processing efficiency is higher, which is conducive to reducing the production cost of the liquid hydrogen storage tank. The spiral rib can separate the impact of liquid hydrogen, and can also separate the thermal stratification caused by heat leakage, shaking and flashing. The temperature difference of each divided part is small, and then the overall temperature difference is also small, which reduces the degree of thermal stratification to a certain extent, thereby achieving the technical effects of preventing liquid hydrogen from shaking and reducing the degree of thermal stratification.

The invention discloses a thin film enclosure system of a low-temperature storage tank and fluid transportation equipment, and relates to the technical field of fluid transportation, the enclosure system is installed on the inner wall of the low-temperature storage tank, the enclosure system comprises a plurality of heat insulation modules installed on the inner wall of the storage tank, and the heat insulation modules are spliced and cover at least part of the inner wall of the storage tank; assembling grooves are formed in the splicing positions of the heat insulation modules; the bridging blocks are installed in the assembling grooves, the bridging blocks can connect the two adjacent heat insulation modules together, and the bridging blocks are fixedly connected with the heat insulation modules through first assembling studs; wherein an expansion stud is arranged on the inner wall of the storage tank, the expansion stud penetrates through part of the heat insulation module and is locked with the heat insulation module through a nut, and the projection position of the arrangement position of the first assembly stud and the projection position of the arrangement position of the expansion stud on the heat insulation module are mutually staggered. According to the heat insulation module, the thickness limitation of an existing heat insulation module of a bridging block can be broken through, and the problem of cold leakage of a gap between every two adjacent heat insulation modules can be solved through arrangement of the bridging block.

A tank system includes a vacuum tank and a pressure tank. The vacuum tank has a vacuum tank main portion extending between vacuum tank end portions. The pressure tank is mounted within the vacuum tank, and has a pressure tank main portion extending between pressure tank end portions. The tank system includes a deflection control system comprising at least one elongate support member extending from a vacuum tank first side of the vacuum tank main portion, and passing through an opening in a pressure tank first side of the pressure tank main portion, and coupled to a pressure tank second side opposite the pressure tank first side. The elongate support member is configured to support the pressure tank main portion and reduce deflections of the pressure tank main portion relative to the vacuum tank main portion when the tank system is subjected to a load.

The invention relates to an industrial gas tank storage place early warning method and system. The method comprises the following steps: acquiring image time sequence data at least representing temperature field distribution of a target monitoring area, generating a temperature image sequence, determining area temperature change characteristics and tank body surface reflection characteristics in the area, and generating reflection area probability distribution of the target monitoring area to determine initial gas leakage probability data of the target monitoring area; generating baseline feature data at least representing background thermal field distribution of the target monitoring area; and performing association processing on the initial gas leakage probability data and the baseline feature data to generate fusion time sequence features and determine a gas leakage diffusion weight so as to correct the initial gas leakage probability data to obtain corrected gas leakage probability data. By adopting the method, the gas leakage probability can be accurately judged by comprehensively utilizing temperature field time sequence information, tank body surface reflection characteristics and background thermal field distribution characteristics under the condition of a complex background thermal field, so that early warning is realized.

The invention belongs to the technical field of solid hydrogen storage, and provides a solid alloy hydrogen storage device with high heat transfer performance and application thereof, and is characterized in that the device comprises a hydrogen storage container, a hydrogen storage alloy and a heat exchange structure assembly; a fin structure and a layering partition plate are arranged in the hydrogen storage container, by optimizing the layering partition plate and the fin structure, displacement and agglomeration of hydrogen storage alloy in a moving or vibrating environment are effectively prevented, the mass transfer and heat transfer performance in the hydrogen storage tank is remarkably improved, hydrogen and heat can be rapidly transferred to the hydrogen storage alloy, and the hydrogen storage effect is improved. Therefore, the hydrogen absorption and desorption efficiency is improved. The method is suitable for AB2 type alloys, AB5 type alloys, BCC type alloys, superlattice hydrogen storage alloys and the like, the hydrogen absorption and desorption process can be efficiently completed at a certain temperature and pressure, and the high efficiency and stability of the hydrogen absorption and desorption process are ensured. And the catalyst can be widely applied to various scenes such as traffic, hydrogen refueling stations, industrial processes and hydrogen energy storage.

The invention discloses an IV-type hydrogen cylinder stress monitoring system, a signal processing method thereof and an IV-type hydrogen cylinder, and relates to the technical field of manufacturing of high-pressure hydrogen storage equipment. The carbon fiber winding layer stress monitoring structure and the liner stress monitoring structure are respectively arranged in a strain generation area of a carbon fiber winding layer and a strain generation area of the outer surface of a plastic liner in the IV-type hydrogen cylinder, so that the surface stress of the liner of the gas cylinder and the stress between carbon fiber winding layers can be dynamically monitored in real time; therefore, the IV-type hydrogen cylinder has the function of dynamically monitoring the stress between the carbon fiber winding layers and the stress of the inner container in real time. According to the signal processing method of the IV-type hydrogen cylinder stress monitoring system, high-frequency noise signals can be effectively filtered, low and medium-frequency signals can be reserved, and the surface stress of a carbon fiber winding layer and a plastic inner container can be accurately measured. The IV-type hydrogen cylinder is provided with the IV-type hydrogen cylinder stress monitoring system and has the function of dynamically monitoring the stress between carbon fiber winding layers and the stress of an inner container in real time.

Membrane tank for containment of fluids at temperature that can differ significantly from ambient temperature, for example for containing a cryogenic fluid, wherein the membrane tank comprises, in direction from an inner containment volume: a primary membrane that is fluid tight, facing the contained fluid in operation and functioning as the primary fluid barrier, an insulation layer, surrounding the membrane on the outside, an outer structure, such as a ship hull or bulkhead or other structure, wherein the outer structure supports the insulation layer and primary membrane inside and carries the resulting forces thereby, and at least one opening for loading and unloading of fluid, and an optional secondary membrane if the outer structure is a steel structure becoming brittle at cryogenic temperature, such as a ship hull outer structure, the secondary membrane dividing the insulation layer into an inner insulation between the primary and secondary membranes and an outer insulation between the secondary membrane and the outer structure, wherein the primary membrane comprises areas of flat, curved or double curved shape and a corrugation in between said areas, wherein said areas are fastened to the underlaying insulation and the corrugations are taking up thermally induced strain. The membrane tank is distinguished in that it further comprises a coupling part for connecting a vacuum pump operatively to the whole insulation layer or the inner insulation layer, for enabling vacuum in the whole insulation layer or the inner insulation layer, during loading, containment and unloading of cryogenic fluid.

The present invention relates to a rebound composite electromagnetic energy dissipation device for reducing sloshing with a liquid-filled ball for a large liquefied natural gas (LNG) storage tank. When the liquid surface sloshes around, the gas spring is pulled by the steel strand to produce vertical displacement and provide a restoring force, and the vertical displacement of the gas spring drives the fan blades on the sleeves of the ball screws at the bottom to rotate in the damping fluid, consuming energy. The present invention uses hydraulic transmission instead of mechanical transmission of traditional piston motion, and the horizontal pistons produce horizontal displacement in the case of pressure unbalance, thus increasing the flexibility of horizontal piston motion; magnets are arranged in the horizontal slideways and the horizontal pistons to intensify the motion of the horizontal pistons and the relative motion between the horizontal pistons and the interior.

Disclosed is a method of fastening a cap of a container, the method including: specifying a screw thread engagement point of a cap and a neck ring of a container; and aligning the engagement point with a fastening start position of the cap and fastening the cap to the neck ring, in which the specifying of the engagement point includes detecting the engagement point by rotating the cap in a reverse direction in a state where the cap is seated on the neck ring.

The utility model relates to a liquid hydrogen storage tank with a vaporizer. Comprising an inner shell used for containing liquid hydrogen; the pressurizing unit comprises a pressurizing pipeline, and a pressurizing valve, a pressurizer and a pressurizing and pressure regulating valve which are sequentially arranged on the pressurizing pipeline in the medium flowing direction; one end of the pressurizing pipeline is connected with the bottom end of the inner shell, and the other end is communicated with the gas-phase space of the inner shell; the pressurizing unit is used for maintaining the pressure of the inner shell at a first pressure; the air supply unit comprises an air supply pipeline, and an air supply valve, a vaporizer, a pressure reducing valve and a check valve which are sequentially arranged on the air supply pipeline in the medium flowing direction; one end of the gas supply pipeline is connected with the bottom end of the inner shell, and the other end is connected with external gas utilization equipment; the vaporizer is used for converting liquid hydrogen into hydrogen, and the pressure reducing valve is used for reducing the pressure of the gasified hydrogen to the pressure required by gas equipment; and the exhaust unit is communicated with the gas phase space of the inner shell and is used for exhausting the overpressure gas. According to the storage tank, gas supply parameters can be changed according to gas use requirements of users, and the applicability is high.

The invention relates to a sealed and insulated container for liquefied natural gas transportation, liquefied natural gas is contained in the sealed and insulated container, the sealed and insulated container serves as a containment system to be arranged inside a ship body of a transportation ship, and the sealed and insulated container comprises two film shielding layers and two insulating layers. A first thin film shielding layer, a first insulating layer, a second thin film shielding layer and a second insulating layer are arranged from inside to outside, and first square insulating plates in the first insulating layer and second square insulating plates in the second insulating layer are arranged in a staggered mode. The interplate gaps in the first insulating layer and the interplate gaps in the second insulating layer are mutually staggered, and the metal connecting pieces at the four corners of each first square insulating block are connected to the center position of the second square insulating block. Through staggered arrangement of the insulating layers, direct heat conduction of gaps between the plates is avoided, cold leakage can be avoided through a circulating double-layer channel, and the modular arrangement is convenient and rapid to install and high in safety.