1603 results about "Heat shield" patented technology

A turbine shroud assembly adapted for use with a gas turbine engine includes a shroud segment. The shroud segment includes a heat shield, an attachment flange, and a multi-layer coating. The heat shield extends circumferentially partway around the axis to define a portion of gas path for the gas turbine engine. The attachment feature extends radially outward from the heat shield. The multi-layer coating is applied to different surfaces of the heat shield and the attachment feature of the shroud segment.

A battery pack for a vehicle electrical system includes a casing for receiving one or more battery modules. The battery modules are insertable into a casing of the battery pack. Additionally, the battery modules may include cooling plate to cool the battery module and provide coolant to another battery module in response to a triggering event. Additionally, the battery modules may include a top cover with a frangible insulating material to further thermally insulate one battery module from another battery module and allow gasses and active material to escape the battery module in response to a triggering event. The battery pack may additionally be configured with vents for venting the gases and active material, such as those generated by a battery module in a thermal runaway event. Additionally, the battery modules may include a heat shield to direct vented gases and active material away from a cabin of a vehicle.

The invention discloses a flat heat shield wall temperature calculation method based on air system network automatic numbering and hole row partitioning, and the method comprises the steps: carrying out the geometric discrete grid division of a wall surface for a flat heat shield in a binary convergent-divergent nozzle in order to accurately calculate the wall surface temperature of the flat heat shield, i.e., dividing a continuous calculation region into a plurality of calculation control bodies, calculating points in all the calculating areas are determined, and heat exchange parameters are calculated through the flow parameters; then, the wall surface temperature is updated through the heat exchange parameters, and the flow heat exchange parameters of the next step are calculated through the new wall surface temperature till the calculation result converges. According to the method, the calculation precision and speed are greatly improved, the wall temperature of the heat insulation screen can be calculated more efficiently and accurately, and then more reliable data support is provided for optimization of a cooling system.

The disclosure provides an air fryer, including a main body and an inner pot. A heat shield of the main body has a first accommodating chamber, a second accommodating chamber and a bottom opening that are sequentially arranged from top to bottom and are in communication with each other. A caliber of the second accommodating chamber is greater than a caliber of the first accommodating chamber. The first accommodating chamber is equipped with blades of a fan inside. The second accommodating chamber is equipped with a heating member inside. A side wall of the second accommodating chamber is a vertical side wall. Cooking efficiency is effectively improved.

The invention relates to the technical field of thermal protection of hypersonic aircrafts, in particular to a multi-scale prediction method for an ablation behavior of a thermal protection structure based on data driving, which comprises the following steps: performing molecular dynamics simulation on a gas-solid interface of an ablation type thermal protection material to obtain simulation calculation activation energy; obtaining the experimental activation energy of the material; performing Bayesian optimization on the simulation calculation activation energy and the experiment measured activation energy to obtain optimized activation energy; performing macroscopic wall surface ablation simulation by taking the optimized activation energy as a boundary condition to obtain an ablation parameter database recording ablation wall surface temperatures, ablation rates and ablation depths corresponding to different flow rates, altitudes and time; training a radial basis function neural network based on the ablation parameter database, and establishing an ablation prediction model; obtaining a prediction result; the calculation efficiency and accuracy of the thermal protection structure ablation behavior multi-scale prediction method can be improved.

The invention relates to the technical field of annealing furnaces, in particular to a multi-bin cover type annealing furnace which comprises an annealing furnace outer heat insulation cover, a sealing cover is arranged above the annealing furnace outer heat insulation cover, a base is arranged at the bottom of the annealing furnace outer heat insulation cover, and an annealing furnace inner chamber is arranged in the annealing furnace outer heat insulation cover. An inner heat insulation cover assembly is arranged on the outer side of the annealing furnace inner chamber; the thermal insulation cover has the beneficial effects that the inner thermal insulation cover assembly is arranged on the outer side of the inner chamber of the annealing furnace, and the driving gear assembly drives the deformation ring plate to rotate, so that the thermal insulation cover unit pieces are moved to be gathered or dispersed under the limiting cooperation of the limiting thermal insulation plate, and when the inner chamber of the annealing furnace is heated, the thermal insulation cover unit pieces are gathered to form a thermal insulation cover; when a workpiece needs to be cooled, the heat shield unit moves and disperses, the gas is immediately dispersed, the pressure intensity is reduced, spray water is vaporized through the cooling spray ring pipe to absorb heat for cooling, the heat is taken out along with gas discharge, and the interior of the inner chamber of the annealing furnace is uniformly cooled.

The invention provides a cooking robot for automatic cooking, and relates to the technical field of cooking robots, the cooking robot comprises a cooking bench, an integrated processor, a manipulator, a lifting hanger, a smoke suction cover, a pot, a circular track, a baffle plate, a rotating motor, a seasoning rack and an inner heat insulation plate; a pot is placed on a stove body of the cooking bench; and an inverted L-shaped lifting hanging bracket is vertically and fixedly arranged on the rear side of the cooking bench at the position of the pot upwards. According to the cooking robot, multiple protection measures are adopted, and the safety of the cooking process is ensured. Due to the design of the baffle plate, oil stains are effectively prevented from splashing out to hurt people in the cooking process, and the safety of operators is protected. And meanwhile, the manipulator is protected by the baffle plate during operation, so that the damage to the manipulator caused by splashing of stains is avoided, and the service life of the manipulator is prolonged. In addition, heat transfer is further isolated through the design of the inner heat insulation plate, and operators are prevented from being hurt due to contact with high-temperature components.

The invention discloses automatic insert injection molding equipment, and relates to the technical field of insert injection molding equipment, the automatic insert injection molding equipment comprises a machine base and a second lifting rod, and a stand column is fixed on the table top of the machine base. According to the automatic insert injection molding equipment, a driving chain wheel is driven to rotate through a transmission mechanism, then a driven chain wheel drives a second lifting rod to rotate through a chain, then a pushing mechanism reaches the position above a movable mold, a workpiece is clamped and pushed to the side face above the movable mold, workers or robots can take materials conveniently, and after material taking is completed, the automatic insert injection molding equipment is convenient to operate. Before next injection molding work, the transmission mechanism can drive the first lifting rod to rotate and drive the heat insulation cover to ascend to the press-fit position of the movable mold and the fixed mold for shielding, workers are prevented from making direct contact with the press-fit position, hot air scalding is prevented, and due to the arrangement of the pushing mechanism, the occupied space can be reduced, and the material taking efficiency can also be improved; and meanwhile, the safety and the working efficiency of the automatic insert injection molding equipment are improved by matching with the heat insulation cover.

The present application discloses a liquid cooling heat dissipation device and a control method, relating to the technical field of liquid cooling heat dissipation. The liquid cooling heat dissipation device includes a heat insulation cover, a heat conducting plate, a cooling structure and a control system. By arranging a plurality of heat conducting areas on the heat conducting plate, the partition management of heat is realized, and the pertinence and efficiency of heat dissipation are improved; a plurality of spraying areas are correspondingly arranged on the cooling structure, and each heat conducting area can be matched with at least one spraying area; a temperature detection mechanism is correspondingly arranged on each heat conducting area, which can monitor the temperature data of each heat conducting area in real time. By setting the control system to dynamically adjust and control the corresponding spraying area to spray an appropriate amount of coolant according to the temperature data of each heat conducting area, the technical problem that the uneven distribution of heat inside the server affects the overall efficiency of the heat dissipation system can be solved, the accurate and efficient cooling of the heat conducting area can be realized, and the accurate heat dissipation can be achieved according to the heat difference generated at different positions of the component to be cooled, and the technical effect of ensuring the uniformity of heat dissipation can be achieved.

The utility model discloses energy-saving steel pipe annealing equipment which comprises a rack, a preheating mechanism, a quenching mechanism and a feeding mechanism are arranged on the rack, a feeding chute is arranged on one side of the preheating mechanism, and the feeding chute is communicated with the preheating mechanism; intermediate frequency equipment is arranged in the rack and connected with the quenching mechanism, a discharging slide way and a feeding slide way are arranged in a heat shielding cover of the preheating mechanism from bottom to top, heat emitted by the quenched steel pipe is used for preheating the steel pipe to be quenched, and therefore the energy utilization efficiency is improved; external energy input required during quenching is also reduced; the heat shield enables heat emitted in the cooling process of the steel pipe to fully preheat the steel pipe to be quenched, the utilization rate of the heat is improved, the preheating effect is further enhanced through the feeding slide way and the discharging slide way which are composed of the supporting rods and the fixing rings, and the whole quenching process is more efficient.

A thermal shade for an automobile having a panoramic roof includes an elongated jacket sized to overlay a vehicle's panoramic roof and a thermally insulating layer sandwiched within the jacket. Magnetic tape strips or individual magnets are located along the perimeter of the jacket and provide means for securing the thermal shade to the automobile. The thermal shade has a streamlined appearance and does not obscure the automobile's doors or door windows and does not interfere with the vehicle's security camera.

The invention provides a method for improving COP defects based on crystal bar temperature gradient control, and relates to the technical field of monocrystalline silicon production, the method comprises the following steps: collecting temperature distribution data of a crystal bar growth interface and surface in real time, and reading a crystal bar pulling speed in real time; calculating an instantaneous V / G value according to the temperature distribution data and the pulling speed of the crystal bar; comparing the instantaneous V / G value with a preset V / G critical value; and according to the comparison result, adjusting the inward or outward opening angle of the scales on the scale type radiation adjusting device arranged between the crystal bar and the heat shield, so as to adjust the crystal bar temperature gradient G by adjusting the heat radiation reflected to different positions of the crystal bar, and further adjust the V / G value. According to the scheme, the thermal radiation reflection path can be dynamically changed according to the actual condition of the single crystal growth stage, so that the temperature gradient distribution of the single crystal growth stage is adjusted, the V / G value is further adjusted to reduce the generation of COP defects, and the quality of the single crystal is improved.

The present invention relates to the technical field of gas turbine combustion chambers, and in particular to a heat shield fixing structure of a gas turbine combustion chamber, comprising a heat shield element, a combustion chamber support structure, fixing bolts, a spring sheet, a spring and a directional pressure plate, wherein the bottom surface of the heat shield element fits the top surface of the combustion chamber support structure, and the countersunk mounting hole on the heat shield element is coaxial with the fixing hole on the combustion chamber support structure, the fixing bolt passes through the axial through hole, the countersunk mounting hole, the fixing hole and the spring of the spring sheet in sequence and is threadedly connected with the threaded hole of the directional pressure plate, the spring sheet is located in the countersunk mounting hole and the outer edge of the spring sheet abuts against the countersunk portion of the countersunk mounting hole, one end of the spring abuts against the bottom surface of the combustion chamber support structure, and the other end abuts against the directional pressure plate. When the combustion chamber support structure vibrates or the operating temperature changes greatly, the vibration force or the operating condition change force can be absorbed by the deformation of the spring sheet and the spring, and is suitable for heat shield elements with relatively low structural strength.

The invention discloses a heat insulation tile with staggered cooling channels for a combustion chamber and a heat shield in the technical field of gas turbines. The heat insulation tile comprises a heat side wall and an outer edge connected with the periphery. The cold side wall is arranged on one side of the hot side wall and connected with the outer edge, and a cavity is defined by the hot side wall, the outer edge and the cold side wall; the multiple transverse cooling channels are longitudinally arranged on the cold face of the hot side wall at intervals, one end of each transverse cooling channel penetrates through the outer edge, the other end of each transverse cooling channel communicates with the cavity, and the flowing directions of cooling gas in every two adjacent transverse cooling channels are opposite; the multiple longitudinal cooling channels are transversely arranged in the hot side wall at intervals, one end of each longitudinal cooling channel penetrates through the outer edge, the other end of each longitudinal cooling channel communicates with the cavity, and the flowing directions of cooling gas in every two adjacent longitudinal cooling channels are opposite. The heat insulation tile has high cooling efficiency, all positions of the heat insulation tile can be evenly cooled, and the ablation phenomenon caused by too high local temperature is effectively prevented.

The application relates to a fixing mechanism of a combustion chamber tile and a combustion chamber heat shield device, wherein the circumferential side edge of the tile is provided with a stepped installation slot, the stepped surface of which constitutes an anchoring surface; the shell is provided with a shell ventilation hole and a containing through hole; the fixing mechanism comprises a pressing disc and a connecting bolt, the pressing disc comprises a middle connecting part, a limiting side plate and a pressing plate, the limiting side plate is located outside the middle connecting part, the lower end of the limiting side plate is connected with the lower end of the middle connecting part, and a cooling cavity is arranged between the two, the pressing plate is connected with the upper end of the limiting side plate and extends outward, the lower end of the middle connecting part is provided with a cooling groove and an abutting surface, a disc-in-plate ventilation hole and a connecting through hole are arranged in the middle connecting part and are connected with the cooling groove and the cooling cavity, one end of the connecting bolt is provided with a pressing head, and the other end is a fixed end; during installation, the limiting side plate of the pressing disc is located in the lower slot part, the connecting bolt passes through the connecting through hole and the containing through hole, the middle connecting part is pressed on the shell by the pressing head, the cooling groove is aligned with the shell ventilation hole, and the pressing plate is pressed on the anchoring surface.

The utility model discloses an integrated three-temperature memory testing machine. The integrated three-temperature memory testing machine comprises a testing cabinet, an airflow instrument, an air blowing module, a heat shield, a tester and an electric control system, the airflow instrument and the electric control system are arranged in the test cabinet, the tester is arranged on the test cabinet, the tester is sleeved with a heat shield, the heat shield, the blowing module and the airflow instrument are sequentially communicated, and the electric control system is connected with the airflow instrument and the tester; according to the integrated three-temperature memory testing machine, an integrated scheme is adopted, the low-medium-high airflow instrument, the tester and the electric control system are integrated in the testing cabinet, and the blowing module and the heat shield are carried to impact a tested device with high-speed gas, so that low-medium-high environment temperature control is realized; therefore, the manual single-machine small-sized three-temperature memory testing machine is miniaturized, modularized, capable of being operated by a single machine and comprehensive in function, and fills the blank that no small-sized three-temperature memory testing machine exists in the market.

The invention relates to the technical field of quartz crucibles, and particularly discloses a melting method for reducing microbubbles on the inner surface layer of a quartz crucible. The arc vacuum melting in the melting method disclosed by the invention comprises the following steps of: rising a heat shielding plate to a position which is 350-450mm away from the upper edge of a mold, and melting the inner surface of a crucible for 45-75s by utilizing a high current which is more than 5000A; then moving down the heat shielding plate, keeping the current unchanged, and melting; the heat shielding plate is lifted, the current is adjusted to be 2200-2500 A, and a transparent layer is formed through vacuum melting; stable melting: adjusting the current to be more than 5000A, and performing high-temperature evaporation; then, the current is adjusted to be reduced to 1800-2200 A, and low-temperature melting is conducted for 120-240 s; and repeating stable melting to obtain the quartz crucible to be demoulded. By means of the technical scheme, the number of microbubbles of the prepared quartz crucible is obviously reduced, the compression strength of the crucible is greatly improved, and the service life of the crucible is greatly prolonged.

The invention discloses a flame cutting robot suitable for blowout out-of-control emergency rescue, and belongs to the technical field of well control emergency rescue. The flame cutting robot suitable for blowout out-of-control emergency rescue comprises a carrier structure and an engine unit; an arm body assembly; the feeding device is assembled on the arm body and is configured to be used for continuously supplying the cutting rope wound on the material storage disc body to the free end of the arm body assembly along a preset route so as to carry out operation; a heat shield body; an oxygen supply pipeline; the camera assembly is configured to acquire a field image; and a control terminal. The cutting robot composed of the carrier structure, the arm body assembly and the cutting rope assembly is arranged, movement of the cutting robot is achieved through the track structure in the carrier structure, continuous supply of the cutting rope in the storage disc body is achieved through the feeding device, and remote control and rescue operation can be conducted in cooperation with the camera assembly and the control terminal.

An aircraft engine, has: a turbine including a turbine rotor rotatable about a central axis; a scroll case having an inlet connected to a source of combustion gases and an outlet fluidly connected to the turbine, and a conduit extending around the central axis from the inlet to the outlet; a bearing housing; a turbine support case secured to the bearing housing, the scroll case disposed axially between the turbine support case and the bearing housing, the turbine support case having spokes extending through the scroll case and radially supported by the bearing housing; and heat shields distributed around the central axis in circumferential alignment with the spokes and extending axially through the scroll case for thermally shielding the spokes, a heat shield of the heat shields disposed around a spoke of the spokes, the heat shield defining an air gap surrounding the spoke inside the scroll case.

The invention relates to the technical field of heater performance testing, in particular to an all-copper quick-heating heater assembly performance testing device and method.The device comprises a water tank, a containing base, a heat insulation cover, a temperature measuring mechanism and an upper connecting piece moving up and down, and the water tank is divided into two parts through a partition plate and used for containing water and a calcium carbonate solution; the placing seat comprises a door-shaped bracket, a lower connecting piece and an auxiliary bearing piece, and the heater is fixed by the upper connecting piece and the lower connecting piece; water pressure resistance detection and thermal efficiency detection are integrated, so that the heater does not need to be disassembled and assembled back and forth during different detections, and the operation convenience is improved; when the thermal performance of the heater is evaluated, besides the conventional thermal efficiency, the heating rate, the heating uniformity and the heat storage capacity of the heater are evaluated by performing multi-point temperature measurement on the surface of the heater, in addition, the influence of scale on the thermal efficiency and the heat storage capacity is simulated by heating a calcium carbonate solution, and multiple detection functions are integrated; and the performance of the heater is evaluated from multiple aspects.

A Czochralski round silicon core growth furnace, comprising a furnace body, a pulling and rotating device, a multi-axis pulling disc device and a heat shield lifting device, wherein the furnace body comprises a main furnace chamber and an auxiliary furnace chamber, and the auxiliary furnace chamber is detachably connected to the main furnace chamber; the pulling and rotating device comprises a crystal pulling and lifting mechanism and a rotating mechanism; the multi-axis pulling disc device comprises a housing and a gear transmission mechanism located in the housing; the crystal pulling and lifting mechanism is connected to the housing; the rotating mechanism is connected to the gear transmission mechanism; the gear transmission mechanism is connected to a plurality of sets of seed crystals; and the heat shield lifting device comprises a lifting drive device and a perforated water-cooled jacket connected to the lifting drive device. The perforated water-cooled jacket is lifted by means of the lifting device to move up and down, and the auxiliary furnace chamber is detachably connected to the main furnace chamber, such that the function of cleaning ash without furnace shutdown is achieved, thereby effectively preventing impurities from falling, and ensuring the purity of a silicon melt.

The invention discloses an anti-oxidation and anti-scouring heat prevention and insulation composite material, a preparation method and application, and belongs to the technical field of high-temperature thermal protection materials. According to the method, a two-step in-situ modification method is adopted, hydrolyzed organosilane reacts with phenolic resin to prepare silicon modified phenolic resin, then the silicon modified phenolic resin is bonded with an organoboron compound to obtain boron-silicon co-modified phenolic resin, a curing agent is added, then the boron-silicon co-modified phenolic resin is injected into a fiber reinforcement mold, and a finished product is obtained through a sol-gel reaction and normal-pressure drying. According to the invention, boron and silicon elements are embedded into phenolic aldehyde molecular chains through covalent bonds to form a boron-silicon-carbon hybrid network, a nano ceramic phase and a compact glassy protective layer are generated at high temperature, and the coating has excellent anti-scouring property, thermal stability and heat insulation property. The preparation process is simple and controllable, is suitable for large-scale production, can accurately regulate and control the performance, and is suitable for thermal protection parts of supersonic aircrafts.

A firearm foregrip comprising: a lower section hingably attached to an upper section; an attachment arm carried by the lower section with an arm open position and an arm closed position, wherein the attachment arm is adapted to be received within a frame of a firearm securing the lower section to the frame when the attachment arm is in the arm open position; and a barrel clamp, connected to the lower section, with a clamp open position and a clamp closed position, wherein the barrel clamp is adapted to receive a barrel of the firearm and secure the lower section to the barrel when the barrel clamp is in the clamp closed position. The foregrip may include a heat shield, multiple attachment rails, and a second attachment arm. The barrel clamp may comprise multiple clamp assemblies to securely attach the foregrip to the firearm barrel.

The utility model discloses a self-adaptive variable acting force heat shield. The heat shield is mainly formed by an inner flexible metal dense net, an outer flexible metal dense net, a flexible heat insulation material and a supporting framework through a forming mold. The inner flexible metal dense net and the outer flexible metal dense net wrap and clamp the flexible heat insulation material to form the flexible main body of the heat insulation cover, so that the heat insulation cover is good in heat insulation performance, strong in damp heat resistance, mould resistance and salt mist resistance, moderate in toughness and rigidity, and capable of generating corresponding displacement and certain elastic deformation according to borne tension, compression and bending acting force; and the device can be suitable for strong wind blowing in any direction and can be used for a long time in a high-temperature environment.

A printing device 11 includes a printing section 16 that performs printing by ejecting a liquid onto a transported medium 99, a support section 21 facing the printing section and having a support surface 22 for supporting the medium, a holding section 26 for holding the medium spanning across from the support section, a heating section 31 that is located downstream of the support section in the transport direction of the medium and that heats the printed medium, and a heat shield section 41 facing the heating section, wherein the heat shield section has a facing surface 43 that faces the heating section and that is separated from the medium extending across from the support section to the holding section, and a protruding section 46 that protrudes from the facing surface toward the heating section at an end portion on a downstream side in the transport direction.

Embodiments include thermal covers to help drain fluids away from dangerous environments, e.g., in an engine bay in a vehicle. Thermal covers can comprise a hat portion extending between two distal edges, support straps beneath the hat portion and extending between the distal edges, and thermal insulation disposed between the hat portion and the support straps. These can be coupled to the floor so as to allow space below for the flow of fluid. This allows the fluid to flow to holes in the floor of the engine bay, allowing the fluid (which could be flammable) to be drained away from potentially dangerous environments in the engine bay which may involve high temperatures.

To disassemble a reactor pressure vessel in a state covered with a heat shield wall.SOLUTION: A method for disassembling a reactor pressure vessel, capable of disassembling a reactor pressure vessel including a nozzle connected to a connection pipe in a state of covering a periphery with a heat shield wall comprises of: a step of cutting a connection pipe along an outer periphery of the heat shield wall; a step of forming a cut piece without having an uncut part of the connection pipe having a size capable of conveying the reactor pressure vessel and a cut piece having the uncut part of the connection pipe; a first removal step of removing the cut piece without having the uncut part of the connection pipe from a reactor container; a step of pulling the uncut part from the heat shield wall by moving the cut piece having the uncut part of the connection pipe in a space direction after removing the cut piece having no uncut part; and a second removal step of removing the cut piece having the uncut part of the connection pipe from the reactor container.SELECTED DRAWING: Figure 4

The invention relates to the technical field of fusion devices, and discloses a composite multi-channel multi-medium pipeline for a fusion device.The composite multi-channel multi-medium pipeline comprises a heat shielding part, a vacuum pipeline, a liquid helium conveying assembly and a first gas helium conveying assembly, and the interior of the heat shielding part is hollow to form a first containing space; the vacuum pipeline sleeves the periphery of the heat shielding part, the vacuum pipeline and the heat shielding part are arranged at an interval, a second accommodating space is formed between the heat shielding part and the vacuum pipeline, and the heat shielding part is used for shielding heat transfer between the first accommodating space and the second accommodating space; the liquid helium conveying assembly is used for conveying liquid helium and arranged in the first containing space to be fixedly connected with the heat shielding piece. The first gaseous helium conveying assembly is used for conveying first gaseous helium and arranged in the second containing space to be fixedly connected with the heat shielding piece and the vacuum pipeline. The composite multi-channel multi-medium pipeline for the fusion device is not only suitable for transmission of different media, but also capable of avoiding heat transfer between the different media.

The utility model discloses an engine heat shield production die which comprises a working table, lifting columns, a top plate, a first air cylinder, an upper die base, a stamping head, a lower die base, a connecting table, a material receiving mechanism, an ejection mechanism and a controller, a plurality of lifting columns are arranged at the upper end of the working table, and the top plate is jointly arranged at the upper ends of the lifting columns. A first air cylinder is arranged above the top plate, an upper die base is arranged below the top plate, the output end of the first air cylinder penetrates through the top plate to be connected with the upper die base, a punching head is arranged below the upper die base, a lower die base matched with the upper die base is arranged above the workbench, and a connecting table is arranged on the side wall of the workbench. According to the die, punched leftover materials can be collected through the material collecting groove and can be stored in time in cooperation with the material collecting mechanism, formed products are ejected out of the forming cavity through the ejection mechanism, and workers can take the formed products conveniently.

The invention relates to a wall (11) for a leaktight and thermally insulating vessel for storing a liquefied gas, said wall (11) comprising, in succession in a thickness direction from the outside to the inside of the vessel, a leaktight outer barrier (13), a thermally insulating barrier (14) and a leaktight inner barrier (15), the thermally insulating barrier (14) having a gas phase at an absolute pressure of less than 1 Pa and comprising:—a radiative multilayer insulation cover (47) which extends at right angles to the thickness direction, said radiative multilayer insulation cover (47) comprising a stack of a plurality of sheets which are made of metal or polymer material coated with a metal and which are separated from one another by a textile layer; and-insulating elements (51) which have an open-celled porous structure and are arranged between the radiative multilayer insulation cover (47) and the leaktight outer barrier (13).