940 results about "Heat Avoidance" patented technology

The invention discloses a sealing performance testing device for a hot melt adhesive film, and relates to the technical field of hot melt adhesive film testing. Which comprises a box body and is characterized in that the bottom of the box body is fixedly connected with a base, the middle of the top of the base is provided with a detection cavity, the top of the box body is provided with a PLC, the middle of the inner bottom wall of the box body is provided with a first electric cylinder, the output end of the first electric cylinder is fixedly connected with a connecting cover, and the middle of the bottom of the connecting cover is fixedly provided with a connecting column; a fixing table is fixed to the bottom of the connecting cover through connecting columns, and an air inlet cover is arranged at the bottom of the fixing table. By arranging the rotating expansion assembly, the fixing table and the sliding groove, hot melt adhesive films of different shapes are laid at the top of the flattening plate at will, the hot melt adhesive films are rapidly rotated and unfolded through multiple stress points, the hot melt adhesive films can be rapidly unfolded, the situation that the detection effect is affected due to the fact that the hot melt adhesive films are wrinkled is avoided, and the detection efficiency is improved. And moreover, the hot melt adhesive film can be prevented from being damaged due to non-uniform tension in the process of unfolding the hot melt adhesive film.

The invention relates to the technical field of hot riveting, and discloses split type hot riveting head modular hot riveting equipment which comprises an upper tool, a lower tool, a heating body arranged at the bottom of the upper tool, a plurality of hot riveting heads arranged at the bottom of the heating body in a linear array mode and a product arranged at the top of the lower tool. The two sets of detachable heating rods are arranged on the two sides of the heating body respectively, the three sets of thermocouples are arranged at the bottom of one side of the heating body, and the heat conduction unit is arranged on the hot riveting head. The heat conduction assembly, the reset assembly and the overturning assembly form a closed-loop action, a heat conduction plate preheats a metal sheet through a heat conduction ring, and infirm connection and deformation caused by temperature difference are avoided. Due to small deflection and overturning separation during hot riveting, heat interference and flash adhesion are avoided; after hot riveting, the material is reset and pushed to be stripped, pull wires are prevented from being pulled up, and a hot riveting head can be surrounded for heat preservation. The whole process does not need extra driving, product quality is guaranteed, takt time is shortened, and automation efficiency is improved.

The invention belongs to the technical field of electric power, and discloses an isolating switch which comprises a base, a second insulating column fixedly mounted at the top of the base, a static contact pad fixedly mounted at the top of the second insulating column, and a disconnecting link assembly hinged to the static contact pad, and the butt joint assembly is fixedly arranged at the top of the base. According to the invention, the disconnecting link main body is driven by an electric motor or a hand wheel to rotate by taking the hinged part of the disconnecting link main body and the static contact pad as a center shaft, so that the butt joint piece falls into the top of the moving contact pad, the butt joint piece pushes the two sliding frames, the conductive piece and the butt joint toothed plate to move relatively, and the butt joint toothed plate is engaged with racks on two sides of the butt joint piece; the contact area of the butt-joint piece and the butt-joint toothed plate is increased through meshing of the multiple racks, the phenomenon of deformation caused by thermal expansion and cold contraction is avoided, meanwhile, the butt-joint piece and the butt-joint toothed plate are in surface contact all the time, the effective conductive section is guaranteed, local overheating and arc discharge are avoided, and the reliability of circuit on-off is guaranteed.

The invention provides a thermal runaway prevention and control device, a battery pack and electric equipment.The thermal runaway prevention and control device is suitable for being installed in a shell of the battery pack and comprises a shell and a gas generation assembly, and the shell is provided with a containing cavity and a first communicating hole communicating with the containing cavity; the gas generation assembly is arranged in the accommodating chamber and is suitable for being triggered to form inert gas when the battery pack is under a preset condition; wherein the inert gas enters the shell of the battery pack through the first communication hole to dilute and / or flame-retardant the thermal runaway product in the shell. The risk of detonation of the thermal runaway product can be reduced or even avoided, and the safety performance of the battery pack is improved.

The invention discloses a heat dissipation substrate and a preparation method and application thereof, and belongs to the technical field of heat dissipation plates. The heat dissipation substrate comprises a first copper layer, a first brazing layer, a first TiC layer, a diamond sheet layer, a second TiC layer, a second brazing layer and a second copper layer which are sequentially arranged in a stacked mode. And a groove for placing a chip is formed in the surface of one side, far away from the diamond sheet layer, of the first copper layer. The heat dissipation substrate is good in heat conductivity, high in heat dissipation efficiency, small in thermal stress between the layers and good in binding force. The preparation method is simple in process, controllable in cost and suitable for industrial production. The vehicle-mounted SiC chip packaging heat dissipation plate comprising the heat dissipation substrate can efficiently dissipate heat under the working conditions of high heat flux, high temperature, high pressure and high frequency, and can effectively prevent the chip from beforehand failure caused by thermal stress and thermal fatigue, thereby ensuring higher reliability and longer service life; and the requirements of high-power and high-current-density new energy automobiles can be met.

The invention relates to the field of battery packaging, and particularly provides a packaging structure and method of a perovskite solar battery. A scribing groove is formed in a top electrode of a perovskite solar cell to be packaged, a transparent substrate is arranged at the bottom of the perovskite solar cell, the packaging structure sequentially comprises a first packaging layer, a second packaging layer and a third packaging layer from bottom to top, and a second packaging layer and a third packaging layer are arranged on the side periphery of the perovskite solar cell. The lower end of the second packaging layer and the lower end of the third packaging layer make contact with the transparent substrate, the first packaging layer is arranged in the scribing groove, the second packaging layer is arranged on the surface of the top electrode, the third packaging layer is arranged on the surface of the second packaging layer, and the elastic modulus of the first packaging layer is larger than that of the second packaging layer. According to the packaging structure, thermal stress can be absorbed and dispersed, thermal stress concentration is avoided, splitting is not likely to occur, and the packaging effect is good.

Aspects of the present disclosure are directed to a memory sub-system with isothermal cooling of components. A PCB assembly may be secured between a heat spreader and a heat sink that are thermally coupled. The heat sink radiates heat absorbed from both sides of the PCB assembly. By connecting the heat spreader to the heat sink, heat is more effectively transferred from the side of the PCB assembly not directly connected to the heat sink. The PCB assembly may be secured between a top enclosure and a bottom enclosure. The top enclosure and the bottom enclosure may be thermally coupled using a vapor chamber. The vapor chamber pumps heat from a higher-temperature side of the PCB assembly to a lower-temperature side of the PCB assembly. By using the vapor chamber to thermally couple the top and bottom enclosures, creation of hot spots is avoided.

Aspects of the present disclosure are directed to a memory sub-system with isothermal cooling of components. A PCB assembly may be secured between a heat spreader and a heat sink that arc thermally coupled. The heat sink radiates heat absorbed from both sides of the PCB assembly. By connecting the heat spreader to the heat sink, heat is more effectively transferred from the side of the PCB assembly not directly connected to the heat sink. The PCB assembly may be secured between a top enclosure and a bottom enclosure. The top enclosure and the bottom enclosure may be thermally coupled using a vapor chamber. The vapor chamber pumps heat from a higher- temperature side of the PCB assembly to a lower-temperature side of the PCB assembly. By using the vapor chamber to thermally couple the top and bottom enclosures, creation of hot spots is avoided.

The invention discloses a battery thermal runaway protection device and an electric energy storage cabinet, and relates to the field of battery protection. By arranging the protection assembly, the battery which may be in danger can be quickly and reliably transferred out from the original position, the influence of the battery body which is in thermal runaway on the surrounding normal battery body is avoided, and a danger diffusion path is effectively cut off; a driving structure related to sliding of the explosion-proof box drives a rotating rod by means of a motor, and drives a positioning rod, a pushing strip and a pushing rod to move through meshing transmission of a driving gear and a fluted disc, so that the explosion-proof box is precisely pushed to slide in a through groove; when the thermal runaway battery body is transferred, the explosion-proof box can be timely moved to a proper position to receive the thermal runaway battery body, the whole process is quick in response and accurate in action, and the explosion-proof box is matched with a fixing groove and an internal structure for driving a tray to act, so that a complete and efficient battery thermal runaway protection mechanism is formed; and the coping capacity and the safety of the electric energy storage cabinet in the case of thermal runaway of the battery are greatly improved.

The invention relates to the technical field of transformers, in particular to a high-stability three-phase oil-immersed three-dimensional wound core distribution transformer which comprises a transformer body, the transformer body comprises a shell, insulating oil is contained in the shell, and a set of three-dimensional wound cores arranged in an equilateral triangle three-dimensional mode are arranged in the shell. The conveying mechanism is located in the center of the three three-dimensional wound iron cores, low-temperature insulating oil is driven by a spiral twisted blade arranged in a shaft pipe of the conveying mechanism to achieve directional conveying, the low-temperature insulating oil makes full contact with high-temperature insulating oil gathered in the middle of the iron cores to complete heat exchange, and accumulated heat in the centers of the iron cores is efficiently taken away; the lifting device dissipates heat, a dispersing mechanism is further arranged in a matched mode, thermal insulation oil gathered around the three-dimensional wound core can be screwed out, continuous retention of the thermal insulation oil around the three-dimensional wound core is avoided, the heat dissipation efficiency of the three-dimensional wound core is further improved, and directional accurate heat dissipation is achieved through cooperation of the conveying mechanism and the driving mechanism.

The utility model discloses a heat dissipation structure of an energy storage converter, relates to the technical field of energy storage converters, and aims to solve the technical problem of poor heat dissipation of the energy storage converter. Comprising a flowing air duct, the air duct flows through an electric appliance element, heat generated in the working process of the electric appliance element is guided out, an air inlet net plate is arranged at the air inlet end of the air duct, an air outlet net plate is arranged at the air exhaust end of the air duct, at least one air guide plate is arranged in the flowing area of the air duct, and flowing air is accelerated. According to the heat dissipation structure of the energy storage converter provided by the embodiment of the utility model, the heat dissipation of the energy storage converter is optimally designed to meet the heat dissipation and high protection requirements of a product, and the heat export in the sealed cavity is improved through the structural design. Air outlet area is enlarged, air resistance of the air outlet is reduced, hot air gathering is avoided, and heat dissipation is enhanced.

The invention discloses a lithium ion battery thermal runaway propagation path prediction and intelligent blocking system. The system comprises a lithium ion battery pack, a high-precision sensor group, an intelligent blocking module, a central controller, an algorithm regulation and control module, a data processing module and a monitoring and feedback module. The intelligent blocking module dynamically adjusts the battery state according to the prediction result, and thermal runaway diffusion is avoided; the algorithm regulation and control module analyzes sensor data by using a dynamic neural radiation field NeRF model and generates an optimal blocking scheme; according to the method, the occurrence and propagation path of thermal runaway can be accurately predicted by adopting a high-precision sensor and an intelligent algorithm, so that the temperature and current are intelligently regulated and controlled for blocking, the safety and reliability of a battery system are effectively improved, and meanwhile, potential risks caused by thermal runaway can also be reduced.

The invention discloses a cable capable of avoiding excessive deformation caused by thermal expansion and cold contraction, relates to the technical field of cables, and provides the following scheme that the cable comprises a conductive cable core and an outer insulating sheath wrapping the outer side of the conductive cable core, and further comprises a liquid cooling assembly arranged in the outer insulating sheath and used for performing high-temperature liquid cooling on the interior of the cable; the excessive stretching prevention assembly is arranged in the outer insulating sheath, is positioned on the inner side of the liquid cooling assembly, and is used for performing excessive stretching protection on the cable when the cable expands with heat and contracts with cold; and the metal shielding protection assembly is arranged in the outer insulating sheath, is positioned on the inner side of the excessive stretching prevention assembly, and is used for carrying out anti-creeping protection on the cable. Through the synergistic effect of all the components, the cable can effectively resist adverse effects caused by thermal expansion and cold contraction, the problems of insulating layer breakage, conductor connection looseness, sheath cracking and the like are reduced, the fault probability is reduced, the service life of the cable is remarkably prolonged, the replacement and maintenance cost is reduced, and good economic benefits and practical value are achieved.

The invention discloses a composite material for an electrolytic cell frame and accessories, and relates to the field of polymer resin materials. According to the composite material, polycarbonate is added on the basis of polyphenylene sulfide (PPS), the effects of toughening and improving the mechanical strength are achieved, meanwhile, hexagonal boron nitride and glass fibers are added according to the specific amount ratio, polyphenylene sulfide is modified through the synergistic interaction mechanism of the hexagonal boron nitride and the glass fibers, and the heat conduction performance of the composite material is remarkably improved; the composite material has the advantages of high thermal conductivity and good mechanical properties. Meanwhile, the invention further discloses a preparation method of the composite material and application of the composite material in the frame and the accessory of the electrolytic cell, a new material choice is provided for the frame and the accessory of the electrolytic cell, and the prepared frame and the accessory of the electrolytic cell can ensure the temperature uniformity of the material and avoid the influence of thermal stress on the durability of the material in use; and the demand of collaborative optimization of light weight and heat management is met.

The embodiment of the utility model provides a battery module. The battery module comprises a battery box and a battery, wherein the battery box comprises a box body, an end plate, a cover plate and a containing cavity defined by the box body, the end plate and the cover plate, and a battery and immersion liquid are arranged in the containing cavity; as the exhaust channel is arranged in the end plate, the inlet of the exhaust channel is arranged at one end, close to the cover plate, of the end plate, and the outlet of the exhaust channel is arranged at one end, close to the bottom plate of the box body, of the end plate, when the battery is in thermal runaway, thermal runaway gas in the accommodating cavity enters the exhaust channel from the inlet; and the high-temperature gas is guided by the exhaust channel to the bottom of the battery box to be exhausted, so that the high-temperature gas in thermal runaway can be exhausted from the bottom far away from the riding room, and potential safety hazards caused by the influence of the high-temperature gas in thermal runaway on the temperature in the riding room are avoided. The utility model further provides a battery pack which comprises the battery module and has the beneficial effects.

Aspects of the present disclosure are directed to a memory sub-system with isothermal cooling of components. A PCB assembly may be secured between a heat spreader and a heat sink that arc thermally coupled. The heat sink radiates heat absorbed from both sides of the PCB assembly. By connecting the heat spreader to the heat sink, heat is more effectively transferred from the side of the PCB assembly not directly connected to the heat sink. The PCB assembly may be secured between a top enclosure and a bottom enclosure. The top enclosure and the bottom enclosure may be thermally coupled using a vapor chamber. The vapor chamber pumps heat from a higher- temperature side of the PCB assembly to a lower-temperature side of the PCB assembly. By using the vapor chamber to thermally couple the top and bottom enclosures, creation of hot spots is avoided.

The utility model relates to the technical field of heat treatment furnaces, in particular to a heat treatment furnace of a large and small circulating system, which comprises a furnace body, partition plates are uniformly and fixedly connected in the furnace body, backflow plates are uniformly and fixedly connected on the inner wall of the top end of the furnace body, and a circulating fan is arranged at the top of the furnace body. And a burner is arranged in each heat dissipation cylinder, the heat dissipation cylinders are located at the bottom ends of the circulating fans, an aging furnace is arranged on one side of the furnace body, one end of the aging furnace is connected with a heat pipeline, and a power conveying mechanism is arranged at the bottom of the furnace body and used for conveying work. According to the device, tension can be prevented from being accumulated in the transmission process of the toothed belt, breakage of the toothed belt caused by tension accumulation is avoided, then heat loss in the heat treatment process is reduced, heat loss can be avoided, it can be guaranteed that a workpiece is evenly heated, and then the heat treatment effect of the device can be improved.

The infrared heating furnace device comprises an oven body, one side of the oven body is fixedly connected with an oven back plate, the side wall of the top end of the oven back plate is provided with an oven cover plate in a rotating mode, the side, close to the oven body, of the oven cover plate is fixedly connected with a second mirror face reflecting plate, the top face of the oven body is of an opening structure, and the top face of the oven body is provided with a second mirror face reflecting plate. The inner bottom surface of the oven body is fixedly connected with a heat insulation plate, the top surface of the heat insulation plate is fixedly connected with a first mirror surface reflecting plate, a plurality of infrared heating pipes are uniformly arranged above the first mirror surface reflecting plate, and two sides, close to two ends of the infrared heating pipes, of the first mirror surface reflecting plate are vertically and fixedly connected with two first reflecting side battens; according to the utility model, the tungsten filament can be subjected to infrared heating in the tungsten filament drawing process, the tungsten filament is heated by adopting the infrared heating tube, the temperature rise speed is high, the infrared heating tube, the second mirror reflector and the L-shaped mirror reflector are utilized to reflect a light source generated by the infrared heating tube, and the infrared light source can be fully reflected and utilized; and the phenomenon of heat energy waste is avoided.

The utility model discloses a cloud laser high-speed marking machine capable of automatically processing smoke, and relates to the technical field of laser marking machines, and the cloud laser high-speed marking machine capable of automatically processing smoke transmits detection information to a control computer when smoke is monitored by a smoke monitor; the control computer tool detects information to automatically control the smoke processing box and the air pump to start smoke discharging work until the smoke monitor detects that smoke disappears, the smoke rotation processing function of the cloud laser high-speed marking machine is achieved, the use convenience of the marking machine is improved, and the working efficiency of the marking machine is improved. Heat on the marking machine body is transferred to the cooling fins through the heat conducting plate, the heat exchange area can be conveniently enlarged, meanwhile, the cooling fan is used for driving air to flow, the air flow rapidly takes away the heat on the cooling fins, and therefore the heat dissipation performance of the marking machine is optimized, and the phenomenon that the marking machine body is affected by heat accumulation is avoided; and the service life of the cloud laser high-speed marking machine can be prolonged.

The application discloses a quick-release type server liquid cooling circulation module and a locking structure thereof, relates to the technical field of servers, and comprises a server body, a liquid cooling circulation module and a mainboard. The liquid cooling circulation module is fixedly connected to the top of the server body. The liquid cooling circulation module is arranged. The thermal stress in the liquid cooling circulation module is subjected to layered elastic compensation. The dynamic adhesion stability and the heat conduction uniformity between the cold plate in the floating module and the CPU / GPU are improved. Meanwhile, the risk of interface loosening or leakage caused by temperature fluctuation and mechanical vibration is effectively inhibited. The long-term reliability and the thermal management efficiency of the system are enhanced while the quick-release convenience is ensured. The side branch mechanism is arranged. The circulation of liquid is realized through a multi-way valve and a side branch pipe. Even if the delivery channel of the liquid outlet pipe is cut off, there is still a minimum amount of coolant flowing through the cold plate in the floating module. The CPU / GPU is given valuable time for safe shutdown or switching to a backup path, and thermal runaway is fundamentally avoided.

The utility model discloses an energy-saving circulating spray sterilization machine, which relates to the technical field of spray sterilization machines, and comprises a base, an annular conveyor belt is arranged at the top of the base, and a disinfection box and a drying mechanism are arranged at the top of the base and outside the annular conveyor belt. And the drying mechanism is located on one side of the disinfection box, a second top plate is arranged at the top of the disinfection box, and a mounting groove is formed in the bottom of the second top plate. Hot water recycling is achieved through cooperation of the collecting hopper, the filter plate and the collecting box, waste of heat and water resources caused by direct discharging of the hot water is avoided, the heating mechanism in the collecting box only needs to supplement heat for backflow hot water according to needs, new water does not need to be continuously heated, and energy consumption is greatly reduced; and on the other hand, the telescopic flexible water pipe is matched with rotation and movement of the rotating frame, a long-distance fixed water pipe does not need to be additionally laid, pipeline heat dissipation loss is reduced, and the energy-saving effect is further improved.

The battery monomer comprises an electrode assembly and a temperature detection piece, the electrode assembly comprises a first pole piece, the first pole piece comprises a first current collector, the first current collector comprises a first coating part, the first coating part is provided with a first area and a second area, and the first area of the first coating part is provided with a first active coating; the temperature detection part is used for temperature sampling and arranged in the second area of the first coating part. Therefore, according to the battery monomer, the space for accommodating the heat-sensitive material layer is formed in the second area of the first pole piece, so that the heat-sensitive material layer can be prevented from protruding out of the first pole piece, the influence on the appearance of the electrode assembly is further avoided, and the temperature detection piece can be arranged at any position of the first pole piece; therefore, the temperature of different positions in the electrode assembly can be monitored, and the electrode assembly has flexible variability.

This utility model relates to a heat-insulating and heat-resistant ceramic tableware, belonging to the field of ceramic tableware technology. It includes a ceramic tableware body with an external heat-insulating structure. This heat-insulating structure includes a heat-insulating carrier slidably connected to the outside of the ceramic tableware body. This heat-insulating and heat-resistant ceramic tableware, by using a heat-insulating carrier, directly isolates the ceramic tableware body, preventing direct contact between the user and the tableware. Furthermore, the inclusion of a vacuum cavity creates a double-layer effect for the heat-insulating carrier, further enhancing the heat-insulating effect. Simultaneously, the inclusion of a heat-insulating pad prevents heat transfer to the table surface and provides a certain degree of anti-slip effect, thus achieving both heat insulation and heat preservation, slowing down the cooling rate of food inside the ceramic tableware.

The utility model discloses an outdoor JP cabinet, which comprises a cabinet body, a cabinet door hinged on the cabinet body, and a wire inlet pipe and a shutter ventilation hole which are arranged at two sides of the cabinet body, the inner side wall of the cabinet body is fixedly connected with a plurality of supporting sheets, a supporting frame is arranged between adjacent supporting sheets, a water retaining cover is integrally formed at one side of the supporting frame, a partition plate is arranged at the inner side of the water retaining cover, and the partition plate is connected with the cabinet door. A plurality of shutter ventilation holes are formed in the water retaining cover, a plurality of second heat dissipation holes are formed in the partition plate, the second heat dissipation holes and the shutter ventilation holes are distributed in a staggered mode, and a plurality of first heat dissipation holes distributed at equal intervals are formed in the water retaining cover. Rainwater is prevented from entering the cabinet body to influence the insulation performance of electrical equipment in the cabinet body, the safety is improved, the cabinet body is ensured to have good heat dissipation capability through the first heat dissipation holes and the second heat dissipation holes, and the situation that the temperature in the cabinet body is too high due to the fact that heat is accumulated in the cabinet body is avoided.

The utility model discloses a water-cooled wall wear-resistant grate boiler which comprises a boiler body, a water-cooled wall body is installed in an inner cavity of the boiler body, a fixing ring is fixedly installed at the position, close to the center, of the outer side of the water-cooled wall body in a sleeved mode, and the outer wall of the fixing ring and the inner wall of the boiler body are fixedly installed. Fixing sleeves are fixedly mounted at the positions, close to the top and the bottom, of the outer side of the water cooling wall body in a sleeving mode, a wear-resisting shell and a wear-resisting sleeve are arranged and fixed in the water cooling wall body, wear-resisting and wear-resisting treatment of the interior of the water cooling wall is achieved, and the service life of the water cooling wall is prolonged; through the arrangement of heat conduction blocks, heat dissipation rods and heat dissipation fins, when high temperature is generated on the inner wall of the furnace body, the high temperature is conducted out by the heat conduction blocks, then heat is transmitted to the heat dissipation rods and the heat dissipation fins, the overall component acts on multiple positions, and the situation that the heat intensively acts on the water cooling wall body, consequently, the water cooling wall body is seriously corroded, and the service life is shortened is avoided; and the service life of the whole furnace body is further shortened.

The invention discloses a high-power lead-acid storage battery system based on a central compact tab, which comprises a positive grid and a negative grid, the center of one end of the positive grid is provided with a positive tab, and the center of one end of the negative grid is provided with a negative tab; by arranging the central compact positive tab and the negative tab and combining the fan-shaped radiation collector strips and the transition region, the current path resistance can be effectively reduced, the uniform distribution of current is realized, and local overheating and voltage drop are reduced. The main current collecting strips in the superconducting grid structure adopt'net diffusion 'and a variable cross-section structure, the joints of the main current collecting strips are thick, the far ends of the main current collecting strips are thin, and current distribution is optimized; the transition region can avoid current concentration, the internal resistance is effectively reduced compared with a traditional battery, and high-rate discharge can be supported. Through integration of the cooling channels, the cooling channels are vertically distributed on two sides of the pole group, and heat conduction optimization of the conductive structure is combined, so that temperature rise under a large-current working condition is reduced, and the risk of thermal runaway is avoided.

The present application relates to a kind of electric tools for the live part of busbar insulation encapsulation, including insulated operating rod, still including encapsulation sleeve assembly, compaction component and execution component;The execution component is arranged at the end of insulated operating rod, and the compaction component is arranged on execution component;The encapsulation sleeve assembly includes heat shrink sleeve and the mounting piece on heat shrink sleeve, and the compaction component includes two insulation sleeve seats fixed on execution component, and the connecting piece for being inserted on mounting piece is arranged on two insulation sleeve seats, and heating strip is also arranged on two insulation sleeve seats, heat shrink sleeve is arranged between two insulation sleeve seats, and heat shrink sleeve is compacted on busbar and encapsulation is completed by the mutual extrusion of two insulation sleeve seats, can keep the stability of device while avoiding the problem of excessive heating time of heat shrink sleeve.

The invention discloses a four-phase composite ceramic heating element and a preparation method thereof, and relates to the technical field of ceramic heating materials, the composite ceramic heating element comprises the following components: 30%-40% of titanium diboride, 30%-40% of titanium carbide, 10%-28% of silicon carbide, 1%-12% of hexagonal boron nitride, 0.5%-3% of nano zirconium dioxide and 1%-4% of silicon nitride. A four-phase composite system of TiB2 (titanium diboride), TiC (titanium carbide), SiC (silicon carbide) and hBN (hexagonal boron nitride) is constructed, basic expansion reduction is achieved through the low expansion characteristic of SiC, thermal expansion mismatching stress between different phases is dispersed in combination with the interface regulation and control effect of an h-BN layered structure, compared with an existing ternary system, the minimum thermal expansion coefficient is reduced to 5.8 * 10 <-6 > K <-1 >, and the thermal expansion coefficient is reduced to 5.8 * 10 <-6 > K <-1 >. And the interfacial compatibility is remarkably improved, and thermal stress is prevented from being gathered at the interface.

The utility model discloses a kind of cathode heater subassemblies for klystron electron gun, it is characterized in that, including: cathode base, heater sleeve, heater and detachable heat shield assembly, the upper and lower two end surfaces of cathode base are respectively provided with emitting surface and mounting groove, heater sleeve is detachably fixed in mounting groove, and the end surface of heater sleeve back to cathode base is equipped with accommodating groove;Heater is installed in accommodating groove, and the part of heater in accommodating groove is wrapped with insulating layer;Heat shield assembly includes outer heat shield and inner heat shield, outer heat shield is sleeved in cathode base, and inner heat shield is installed in outer heat shield and covers heater sleeve and heater.The utility model can realize reversibility dismounting and maintenance, and heater material volatilization can be avoided directly deposited on the emitting surface of cathode base, help to maintain the emitting surface cleanliness of cathode base, to improve electron emission efficiency, high-temperature solder can also be reduced in use, reduce cost.

The utility model discloses a dynamic heat dissipation device coping with local temperature mutation of a cabinet server, the horizontal extension direction of a back plate of a cabinet is defined as an X direction, the horizontal extension direction of a side wall of the cabinet is defined as a Y direction, the height direction of the cabinet is defined as a Z direction, and the dynamic heat dissipation device comprises a Z-direction guide column, an X-direction guide rod, a fan and a plurality of temperature sensors; the bottom of the Z-direction guide column is rotationally sleeved with a bottom supporting foot, and the Z-direction guide column supports the X-direction guide rod in a lifting mode. A fan is horizontally supported on the X-direction guide rod along the X direction; and the temperature sensors are arranged at heat dissipation ports of a plurality of servers in the cabinet. According to the heat dissipation device, the heat dissipation module is designed to be of a flexibly movable structure, adjustment can be conducted according to the real-time change of server load distribution, and heat dissipation resources are optimally configured. According to the dynamic heat dissipation system, the heat dissipation efficiency can be remarkably improved, hot spot accumulation is avoided, energy waste can be reduced, and the green and energy-saving purposes are achieved.