105results about How to "Reduce wall thickness" patented technology

The invention discloses a heat exchange structure design method based on three-period minimal curved surface space subdivision. The invention provides a heat exchange structure design method based on a three-period minimal curved surface (TPMS) structure, and aims to improve the performance of efficient heat dissipation equipment. According to the method, by generating the Gyandroid structure and conducting multi-layer subdivision, the fluid flowing path is optimized, and the heat exchange efficiency is improved. Meanwhile, by adopting the lightweight composite material for construction, the structural weight is remarkably reduced, and the composite material is suitable for high-efficiency heat dissipation application in the fields of new energy automobile battery heat management, electronic equipment, aerospace and the like. Through finite element simulation analysis, the heat dissipation performance and mechanical strength of the structure are verified, efficient heat dissipation can be achieved in a limited space, and the service life of equipment is prolonged.

The invention relates to the technical field of silicon carbide ceramics, in particular to a preparation method and a sintering device of a large-sized pressureless sintered silicon carbide ceramic tubing, and the preparation method comprises the following steps: uniformly mixing beta-type silicon carbide whiskers, graphite powder, boron carbide, a sintering aid, a dispersing agent, a binder and silicon carbide micro powder, then adding water, and stirring to prepare pug with the water content of 32-38%; pugging is conducted till pug with the water content being 8%-11% is obtained, and then the pug obtained after pugging is sealed and aged at the room temperature; carrying out extrusion molding on the aged pug through a vacuum extruder to obtain a ceramic tube blank; the ceramic blank pipe is fed into drying equipment to be dried; and sintering the ceramic blank tube in a nitrogen atmosphere at 1900-2150 DEG C to obtain the silicon carbide ceramic tube. By adding the beta-type silicon carbide whiskers, the silicon carbide micro powder, the sintering aid and other substances, the toughness and strength of the silicon carbide ceramic pipe can be enhanced, the wall thickness of the pipe can be reduced on the premise of keeping the same strength level, thermal resistance can be reduced, and the heat exchange efficiency of a heat exchanger can be improved.

The invention relates to the field of metal material casting, and discloses a production method of green sand as-cast high-plasticity nodular cast iron QT800-5, which comprises the following steps: preparing pig iron, waste steel and foundry returns, and using auxiliary materials such as a silicon carbide pretreating agent, a high-temperature graphitization carburant, a rare earth magnesium silicon iron nodulizing agent, a silicon barium nucleating agent and a silicon strontium nucleating agent to prepare the green sand as-cast high-plasticity nodular cast iron QT800-5. The purity and component stability of molten iron are ensured; in the smelting process, purification and adjustment are carried out through temperature control and segmented addition of auxiliary materials, then spheroidizing is carried out through a pouring method, and the microscopic structure of a casting is optimized through ladle-to-ladle inoculation and stream inoculation; the final casting has excellent mechanical properties including the tensile strength larger than or equal to 800 MPa, the yield strength larger than or equal to 480 MPa, the elongation larger than or equal to 5% and the matrix pearlite content larger than or equal to 80%. The production process disclosed by the invention is simplified, is suitable for large-scale industrial production, and has a wide application prospect in lightweight application requiring high-strength and high-plasticity materials.

The utility model discloses a uniform heating type injection molding nozzle which comprises a nozzle body and a nozzle tip arranged in the nozzle body, and further comprises a heater arranged on the nozzle body in a sleeving manner, and the heater comprises a heat conduction sleeve and a graphene heating layer wrapped on the heat conduction sleeve; the graphene heating layer is provided with a pair of first contacts which extend in the radial direction of the graphene heating layer and protrude out of a body of the graphene heating layer, and the first contacts abut against second contacts arranged on a pair of wires of an external power source to be used for heating the graphene heating layer. According to the heater, electric connection is achieved in a contact mode, disassembly and assembly are convenient, the heating mode is optimized into a surface heating mode, better heating uniformity is achieved, needed heating power is reduced, and the transverse occupied space is saved through the small wall thickness.

The invention discloses a sealing, reinforcing and plugging process for a long-well-section large-drift-diameter expansion pipe, and relates to the technical field of oil field well pipe reinforcing and repairing. A plurality of rubber rings are attached to the outer side of the expansion pipe, and the rubber rings are arranged at equal intervals in the axis direction of the expansion pipe; on the outer wall of the expansion pipe, the section between every two adjacent rubber rings is coated with a thermosetting bonding layer; the outer diameter of the thermosetting bonding layer is smaller than that of the rubber ring. The thermosetting bonding layer is creatively arranged on the outer side of the expansion pipe, the structural strength of the expansion pipe is improved through the bonding effect of the bonding layer, the wall thickness of the expansion pipe is reduced, in other words, the inner diameter of the installed expansion pipe is enlarged, and therefore the application range of the expansion pipe plugging technology is expanded. Meanwhile, the technical scheme has the advantages of being long in plugging well section, good in sealing effect and low in single well construction cost.

The invention discloses a mine grouting device suitable for a soft stratum. The mine grouting device comprises a grouting pipe, a plurality of grouting sprayers and a plurality of swinging anchor flukes, wherein the grouting sprayers are slidably connected with the pipe wall of the grouting pipe and can slidably stretch out and draw back in the radial direction, and the swinging anchor flukes are pivotally connected with the pipe wall and can be supported by the grouting sprayers. The grouting nozzle and the swing anchor fluke are retracted in a normal state and then extend out and swing out respectively during grouting, so that the influence on the hole wall of a grouting drill hole in a soft stratum is reduced, the defect that a large number of cracks are generated around the grouting drill hole in the soft stratum is overcome, and the grouting efficiency is improved. The situation that the soft stratum collapses around the grouting drill hole due to the fact that the anchor flukes are exposed can be effectively avoided, stretching of the grouting spray head completely depends on impact force or buoyancy provided by grout, swinging of the swinging anchor flukes completely depends on the driving effect of the grouting spray head, and extra power is not needed.

The invention relates to the technical field of high-pressure containers, in particular to a gas storage structure, a gas storage bottle and a manufacturing method of the gas storage structure. In the gas storage structure, a straight cylinder section is arranged between two end socket sections; the straight cylinder section is provided with a straight cylinder section end part connected with the end socket section, the end surface, deviating from the straight cylinder section, of the straight cylinder section end part is provided with a first step surface, a second step surface and a first slope surface, the first step surface, the second step surface and the first slope surface are sequentially connected, and the first step surface and the second step surface are connected to form a first step structure; the end socket section is provided with an end socket section end connected with the straight barrel section, the end face, away from the end socket section, of the end socket section end is provided with a third step face, a fourth step face and a second slope face, the third step face, the fourth step face and the second slope face are sequentially connected, and the third step face and the fourth step face are connected to form a second step structure; the first step surface is welded with the third step surface, the second step surface is welded with the fourth step surface, and the first slope surface is welded with the second slope surface.

The utility model discloses an octopus foot imitating suction cup type soft gripper which comprises a soft gripper body and a sealing cover, the soft gripper body is poured on the sealing cover, and an upper driving cavity and a lower driving cavity which are communicated with each other are formed in the soft gripper body; the upper driving chamber is of a flat U-shaped structure, and the lower driving chamber is of an umbrella-shaped structure; a second vent hole is formed in the sealing cover, a first vent hole is formed in the soft gripper body, and the second vent hole communicates with the driving upper cavity through the first vent hole. According to the soft gripper body, the silica gel rubber material is poured on the sealing cover, so that the air tightness between the soft gripper body and the sealing cover is better guaranteed, the connection between the soft gripper body and the sealing cover is further reinforced, and an object can be more stably adsorbed and grabbed. Concave edges are arranged on the inner wall of the driving upper cavity, the wall thickness of the inner wall is evenly reduced to increase the deformation quantity, and the inner wall of the driving upper cavity can also be provided with a convex edge structure to increase the structural strength of the inner wall.

The utility model provides a box body and a water softener, and the box body comprises a salt box which is provided with an inner cavity and a plurality of first supporting parts, the inner cavity is used for bearing salt water and a resin tank, and the plurality of first supporting parts are arranged on the side wall of the inner cavity at intervals; the supporting middle shell is provided with a connecting base body and a first supporting base body, the connecting base body is arranged on the top of the salt box, the connecting base body covers the top opening of the inner cavity, the first supporting base body is connected with the connecting base body, the first supporting base body is located in the inner cavity, the first supporting base body abuts against the side wall of the inner cavity, and the first supporting base body is connected with the first supporting part. Due to the fact that the supporting middle shell and the side wall of the salt box jointly bear loads through cooperation of the first supporting base body and the first supporting part, the bearing pressure of the salt box is remarkably reduced, the wall thickness of the salt box can be reduced on the premise that the structural stability is not affected, and the material cost is reduced. Meanwhile, the double-support structure further improves the rigidity and durability of the whole structure by limiting the deformation of the side wall of the salt box, and the service life of the water softener is prolonged.

The application provides an earphone shell assembly and an earphone. The earphone shell assembly comprises a first shell and a second shell. The first shell has a first interfacing surface, and the second shell has a second interfacing surface. Part of the first shell is recessed from the first interfacing surface along a first direction to form a step. Part of the second shell is protruded from the second interfacing surface along the first direction to form a protrusion. The protrusion is inserted into the step. The surface of the step along the first direction is recessed to form a glue storage groove. The earphone shell assembly provided by the application can be used for storing adhesive, can increase the amount of adhesive on the surface of the step along the first direction, is beneficial to improving the sealing effect after assembly, is beneficial to the forming of the step and the protrusion, reduces the wall thickness of the first shell and the second shell at the sealing position, and is further beneficial to reducing the size of the entire earphone.

The utility model relates to a battery module, and relates to the field of new energy batteries. The utility model provides a battery module. The battery module comprises a plurality of coplanar battery cells and a plurality of buffer pieces, the plurality of coplanar battery cells are arranged at intervals; the coplanar battery cell comprises a shell structure, at least one partition plate and a plurality of roll cores, an accommodating groove is formed in the shell structure, the at least one partition plate is arranged in the accommodating groove and divides the accommodating groove into at least two mounting cavities, and the roll cores are arranged in the mounting cavities; buffering pieces are arranged between the adjacent shell structures. Compared with the traditional scheme, the battery module has the advantages that under the condition of realizing the composition of the same voltage platform or capacity, the coplanar battery cells are arranged, so that the at least two roll cores share one shell structure, and the wall thickness of at least one large surface and the thickness of at least one buffer piece are reduced compared with the traditional scheme; therefore, the space occupied by the plurality of coplanar battery cells in the length direction is reduced, the volume energy density of the battery module is improved, and the manufacturing cost is also reduced.

The utility model provides sensor temperature resistance experiment equipment which comprises a heating box, a detachable top cover is installed at the upper end of the heating box, a heating resistance wire and a refrigeration sheet are installed on the lower surface of the top cover, a round hole used for inserting a temperature sensor is formed in one side face of the heating box, and the temperature sensor is arranged in the round hole. A plurality of spiral heat exchange pipes are evenly installed in the heating box, the two ends of each heat exchange pipe are communicated with two liquid distribution pipes located on the outer side of the heating box respectively, the two ends of each liquid distribution pipe are closed, hoses are installed on the outer surfaces of the two liquid distribution pipes, and the ends, away from the liquid distribution pipes, of the hoses are communicated with a water storage box. The water storage box is installed at the movable end of an electric push rod which is vertically arranged, the cylinder end of the electric push rod is fixedly connected with the lower surface of a transverse plate, and the heating box has the advantages that heat in the heating box is utilized, and consumption of electric energy is reduced.

The invention relates to the technical field of heat energy storage, in particular to a low-liquid-level fused salt storage tank for a photo-thermal power station. A low-liquid-level device is arranged at the position, corresponding to the molten salt pump, of a bottom plate of the tank body, and the low-liquid-level device comprises an annular-groove-shaped connecting pipe assembly and an annular-groove-shaped sleeve. A main body of the connecting pipe assembly is embedded in the foundation, the end, provided with an opening, of the connecting pipe assembly is fixedly connected to the peripheral wall, provided with the through hole, of the bottom plate, so that a low-liquid-level area communicated with the interior of the tank body is formed in the groove of the connecting pipe assembly, and a suction pump shaft of the molten salt pump extends into the low-liquid-level area. The sleeve is arranged outside the pipe connecting assembly in a sleeving mode and fixed into the foundation in an embedded mode so that a space for the pipe connecting assembly to move can be formed between the sleeve and the pipe connecting assembly. According to the low-liquid-level fused salt storage tank, the technical problem of dead salt in a low-liquid-level area is solved on the premise that relative movement between the bottom of the storage tank and a foundation is not affected.

The present invention belongs to the technical field of motor shell preparation, and discloses a method for preparing a motor shell by using an extrusion thickening and deep drawing process, so that the aluminum alloy motor shell will not be broken during the forming process, and the production efficiency and qualified rate of the aluminum alloy motor shell are improved. The method includes: step 10, through experimental measurement and simulation analysis methods, the aluminum alloy plate drawing coefficient for setting each process is obtained; step 20, according to the aluminum alloy plate drawing coefficient, the aluminum alloy plate is deep drawn to obtain a first motor shell; the height of the first motor shell is H; the first motor shell includes an upper motor shell and a lower motor shell; the upper motor shell is located above the lower motor shell, and the upper motor shell has a convex arc surface; step 30, using an extrusion process to reduce the diameter of the upper motor shell until the motor shell is obtained; during the extrusion process, the height of the upper motor shell and the height of the lower motor shell remain unchanged.

The utility model relates to the technical field of bricks, and discloses a light carbon fixation hollow brick which comprises a rectangular brick body, and the brick body comprises a top surface and a bottom surface which are arranged back to back; the top face and the bottom face are each provided with two first profiled grooves which are symmetrically formed in the front-back direction and two second profiled grooves which are symmetrically formed in the left-right direction. The two first profiled grooves in the top surface and the two first profiled grooves in the bottom surface are symmetrically arranged up and down, and the two second profiled grooves in the top surface and the two second profiled grooves in the bottom surface are symmetrically arranged up and down. The first profiled groove and the second profiled groove are similar in structure but not consistent in size. The first groove and the second groove are formed in the surface of the brick, so that the absorption contact area of carbon dioxide during carbon sequestration can be increased, meanwhile, the wall thickness is reduced, the brick can fully react with the carbon dioxide, and the carbon sequestration efficiency and the carbon sequestration amount can be effectively improved.

The invention relates to a device (1) for controlling the temperature of an article (2), comprising: a chamber (5) for accommodating the article (2), which chamber (5) is surrounded by a chamber circumference (7), a bottom element (4) and a cover element (8); a heating element; a running wheel (9) for circulating a first gas, said running wheel (9) being arranged in the chamber (5); and a running wheel drive (12), by means of which the running wheel (9) is rotated. The heating element is formed by the rotor (9) having the rotor drive (12).

The wall multiplying power of the wood structure solid wall can be improved without additionally installing reinforcing materials or reinforcing materials or increasing the specific gravity and / or the plate thickness of gypsum surface materials. A gypsum-based solid surface material (10) for a wood structure solid wall is configured from a main material or a core material and a paper member covering at least the front and back surfaces of the main material or the core material, the main material or the core material being formed from a plate-shaped gypsum hardened body in which inorganic fibers and an organic-based strength reinforcing material are mixed, and being capable of exhibiting a nail side resistance of 500 N or more. The present invention relates to a solid-resistant surface material which has a surface density in the range of 6.5-8.9 kg / m2 and a compressive strength of 6.5 N / mm2 or more, exhibits a limit displacement ([delta] u) of more than 20 * 10 <-3 > rad and an initial stiffness (K) of 2.0 kN / 10 <-3 > rad or more in an in-plane shear test of a solid-resistant wall, and is capable of improving the plasticity ([mu]) not only by increasing the limit displacement and by decreasing the yield point displacement ([delta] v), but also by reducing the initial stiffness (K) of 2.0 kN / 10 <-3 > rad. Therefore, the wall multiplying power and the short-term reference shear endurance (P0) of the wood structure endurance wall can be effectively or efficiently improved.

The invention discloses a steel fiber concrete grid connection node filled with a hollow bolt ball and a manufacturing method thereof, comprising a grid chord, a hollow bolt ball, a high-strength bolt, a single-sided concave sleeve, a grouting hole, steel fiber concrete and the like; the hollow bolt ball is welded by two hollow hemispheres, threaded holes, grouting holes and exhaust holes are arranged on the hollow bolt ball, the high-strength bolt passes through a cone head and a single-sided concave sleeve and is screwed into the threaded hole of the hollow bolt ball; the single-sided concave sleeve and the high-strength bolt are connected by a pin; the high-strength bolt is driven to rotate by rotating the single-sided concave sleeve and is screwed into the threaded hole of the hollow bolt ball; the grouting pipe and the exhaust pipe end are provided with external threads and are tightened on the hollow bolt ball, the grouting pipe is provided with a switch valve, and the exhaust pipe outlet height exceeds the highest position of the spherical surface; the steel fiber concrete is filled in the hollow bolt ball through the grouting hole through the grouting pipe, the grouting is stopped after the concrete overflows from the exhaust pipe, and the grouting pipe valve is closed.

The invention relates to a reinforcement structure (10) comprising: - at least one elevation reinforcement profile (12) extending along an elevation direction (z), said elevation reinforcement profile (12) delimiting an elevation cavity; at least one transverse reinforcement profile (14) extending along a transverse direction (t), substantially perpendicular to the elevation direction (z), - and at least one compartment panel (16) extending against the elevation reinforcement profile (12) and the transverse reinforcement profile (14). The reinforcement structure further includes at least one reinforcement element (46) extending along at least a portion of the elevation reinforcement profile (12) between said elevation reinforcement profile (12) and said compartment panel (16), said reinforcement element (46) being made of a material having a tensile strength greater than the tensile strength of the material forming the elevation reinforcement profile (12).

This utility model discloses a high-toughness PVC-U pipe fitting, including a direct body and pipe joints disposed at both ends of the direct body. The inner wall of the pipe joints is provided with adhesive wall-hanging grooves. The surface of the direct body is provided with multiple folded expansion grooves along the axial direction. Tie bars are pre-embedded inside the direct body, parallel to the axis, and multiple tie bars are equidistantly arranged along the circumference of the direct body. This utility model improves adhesive adhesion by providing adhesive wall-hanging grooves on the inner wall of the pipe joints, thereby increasing the bonding strength and reducing the risk of adhesive separation and decreased sealing. By providing folded expansion grooves on the surface of the direct body, the wall thickness is reduced at the location of the folded expansion grooves, and the bending deformation space is increased, thereby improving the toughness of the direct body, reducing internal stress accumulation after installation, delaying aging damage, and extending service life, thus improving practicality.

The present invention provides a low-temperature storage and transportation container, including an outer tank, a plurality of inner liners and a support assembly. The outer tank includes a cylinder and two heads respectively located at both ends of the cylinder; a plurality of inner liners are arranged side by side and spaced apart in the outer tank; each inner liners extends between the two heads, and each inner liners has a space between the cylinder; the support assembly is supported between the plurality of inner liners and the outer tank. Through the above arrangement, a plurality of inner liners are adapted to an outer tank, the diameter of the inner liners is reduced, and the wall thickness of the inner liners is effectively reduced when the design pressure bearing capacity of the inner liners is the same, thereby reducing the difficulty of making the inner liners materials, the difficulty of molding the inner liners and the difficulty of detecting the inner liners after molding, and finally reducing the difficulty of manufacturing the inner liners. Moreover, the pressure of the plurality of inner liners can be set according to actual needs, and different media can be stored and transported to meet various needs.

The present invention discloses an electric vehicle with a frame-type frame, which has two main beams arranged along the length direction of the electric vehicle, the two main beams are arranged in parallel in the width direction of the electric vehicle, a plurality of cross beams are bridged on the two main beams, a faucet pipe is connected to the front end of the two main beams, and a rear flat fork is connected to the rear end side of the two main beams; the middle position of the two main beams in the length direction has an arc-shaped protrusion extending downward, and a mounting structure is formed between the two arc-shaped protrusions, a pedal is provided on the upper side of the mounting structure, and a battery is used to be accommodated in the mounting structure. A support beam is provided between the cross beams provided on the front and rear sides of the frame, the support beam is provided on the lower side of the pedal, the support beam is offset to the upper side of the mounting structure, and a plurality of extended crimping structures are provided on the support beam, and the crimping structures are used to be crimped on the battery. The controller is electrically connected to the battery and the motor, and the controller is electrically connected to the power unit and the electric control provided on the front side of the electric vehicle through a main cable.

The utility model relates to a shell partition plate and an engine-transmission-assembly, the shell partition plate is provided with a bearing seat, the bearing seat is used for axially and radially supporting a helical tooth type gear, the gear is connected with an intermediate shaft in an anti-torque mode and is meshed with a driven gear, and the driven gear is also provided with helical teeth. Wherein the bearing seat is spaced from at least one through hole in the shell partition plate. In order to improve the service life of the housing partition during operation, the bearing block has a disc-shaped load surface which is surrounded by a cylindrical outer-cover-shaped radial bearing body which is integrally connected to an umbrella-shaped reinforcing structure in a peripheral region facing away from the disc-shaped load surface, an umbrella-shaped reinforcing structure connects the radial bearing body in a force-transmittable manner to a diaphragm body surrounding the bearing block radially outside, such that the stiffness of the housing diaphragm is effectively increased in a critical region between the bearing block and the through-hole when an axial force acts on the disc-shaped load surface during normal operation.

This utility model discloses a cycloalkane dehydrogenation system, belonging to the field of cycloalkane dehydrogenation technology. The cycloalkane dehydrogenation system includes a reaction feed heat exchanger, a steam condensate preheater, a reactor steam preheater, a reaction discharge cooler, a heat transfer medium steam heat exchanger, a dehydrogenation reactor, and a separator. The reaction feed heat exchanger, steam condensate preheater, and reactor steam preheater are sequentially connected to the feed inlet of the dehydrogenation reactor. The product outlet of the dehydrogenation reactor is sequentially connected to the reaction feed heat exchanger, reaction discharge cooler, and separator. The steam condensate outlet of the reactor steam preheater is connected to the steam condensate preheater. The gaseous product outlet of the separator is connected to a circulating hydrogen pipeline. The steam condensate outlet of the heat transfer medium steam heat exchanger is connected to the steam condensate preheater. This cycloalkane dehydrogenation system can extend the lifespan of the heat transfer medium, fully utilize the energy of high-pressure steam, and extend the catalyst lifespan.

This invention relates to a liquid cooling heat dissipation device and an energy storage battery module having the same, comprising a four-way valve and a flow guiding assembly. The four-way valve includes a first chamber, a second chamber, a third chamber, and a fourth chamber. A main water inlet is provided in the first chamber, and a main water outlet is provided in the third chamber. The first and fourth chambers are connected, as are the second and third chambers. A first water inlet is provided in the first chamber, and a first water return outlet is provided in the second chamber. A second water inlet is provided in the fourth chamber, and a second water return outlet is provided in the third chamber. The flow guiding assembly includes a first flow guiding channel and a second flow guiding channel. The first flow guiding channel includes a first flow guiding inlet and a first flow guiding outlet, and the second flow guiding channel includes a second flow guiding inlet and a second flow guiding outlet. The flow guiding assembly for cooling is no longer located at the bottom of the energy storage battery, does not require load-bearing, can reduce the wall thickness of the flow guiding assembly, reduce the space occupied, and thus increase the energy density of the energy storage battery.

The utility model discloses a novel heliostat stand column relates to tower type solar thermal power generation technical field, including the stand column body and the flange disc of setting at the top of stand column body, and the stand column body is the tubular structure of upper and lower port through and overall hollow, and the stand column body bottom part inserts the concrete, and the stand column body bottom part is located in the concrete and is provided with the opening section, and the opening section is uniformly distributed with a plurality of weight reduction holes for improving and the concrete bonding degree on the circumference array. The stand column body of the utility model adopts the circular thin -walled pipe structure design, reduces the stand column diameter and wall thickness, and the material and transportation cost are reduced significantly. The opening section is equipped with the circumferential distribution's strip or circular weight reduction hole, can improve the bonding degree of concrete and steel stand column, reaches the purpose that steel stand column and concrete integration works, effectively promotes the torsional and tensile capacity of stand column.

The utility model provides a heat preservation box for cold chain distribution, and relates to the technical field of cold chain distribution, the heat preservation box comprises a box body, a heat preservation layer is attached to the inner surface of the box body, a cleaning layer is attached to the inner surface of the heat preservation layer, the cleaning layer is provided with a turnover edge, the turnover edge is provided with a first fastening screw, and the turnover edge is provided with a second fastening screw. The cleaning layer is fixed on the box body through the first fastening screws; a box cover is hinged to the box body, a second fastening screw is arranged on the lower surface of the box cover, an elastic net is fixed to the lower surface of the box cover through the second fastening screw, and a phase change cold storage agent is placed in the elastic net; a temperature sensor is arranged on the box body, the temperature sensor is electrically connected with a display screen arranged on the box cover, the temperature sensor detects the temperature of the box body in real time, and the temperature is displayed through the display screen in real time. The heat preservation box has the advantages of being light in weight, long in heat preservation time, capable of monitoring the temperature in the heat preservation box in real time and reminding delivery personnel when the temperature is too high and convenient to clean.

The application discloses a device cabin apron, a vehicle device cabin and a rail vehicle, relates to the technical field of rail transit, and discloses a device cabin apron, a vehicle device cabin and a rail vehicle, which relates to the technical field of rail transit, and the device cabin apron comprises an apron main body and at least two reinforcing beams. Wherein the apron main body is integrally formed of a composite material, the apron main body is provided with at least two apron profile cavities, and a concave groove is formed between the two adjacent apron profile cavities; the at least two reinforcing beams are arranged in the transverse direction of the apron main body at intervals, and the reinforcing beams are connected with the at least two apron profile cavities. The above-mentioned device cabin apron solves the problem that the existing aluminum alloy apron cannot meet the requirements of light weight and performance.