102results about How to "Reduce heat transfer" patented technology

This invention belongs to the field of iron and steel smelting technology, and particularly relates to a protective device and manufacturing method for a converter movable fume hood lifting lug. It includes lifting lugs and a movable fume hood. The lifting lugs are welded to the movable fume hood. A protective cover with an internal interlayer, matching the outer contour of the lifting lug, is hung on the outside of the lifting lug. The two sides of the interlayer of the protective cover are connected by ribs. Several V-shaped anchoring nails are welded to the interlayer wall of the protective cover. Refractory grout is filled into the interlayer of the protective cover. Asbestos is laid between the protective cover and the lifting lug. One end of the protective cover is welded to the movable fume hood. Several round rod hanging lugs are welded to both sides of the protective cover, and the upper ends of the round rod hanging lugs are hung on the lifting lugs. This invention isolates the lifting lug from the heat source through the protective cover, preventing the lifting lug from being burned. While the protective cover is fixed to the lifting lug and the movable fume hood, it reduces the contact area, thereby reducing heat transfer.

This utility model discloses a low-temperature high-frequency surgical scalpel, comprising: a handheld part; and a scalpel head body mounted on the handheld part. The handheld part is used to connect a power source, enabling the scalpel head body to perform high-frequency cutting. The scalpel head body includes a blade surface and a cutting edge, with the cutting edge surrounding the blade surface and having a beveled structure. The surface of the blade surface is coated with an insulating coating. This allows for low-temperature, high-efficiency cutting, reducing thermal damage to tissues.

The application relates to a dual-phase high-entropy ceramic material for high-temperature thermal barrier coatings and a preparation method thereof, in particular to a dual-phase high-entropy ceramic (La 0.2 Nd 0.2 Gd 0.2 Y 0.2 Ho 0.2 )2Zr2O7 with low thermal conductivity and high thermal expansion coefficient, which is mainly used for thermal isolation, thermal barrier coatings and other applications in high-temperature environments. The application is prepared by adopting a solid-phase reaction sintering process through accurate design of the combination of rare earth elements, forms a stable dual-phase structure, effectively inhibits grain growth through grain boundary pinning, and thus maintains a nanoscale grain structure. Meanwhile, the material can efficiently block heat transfer at high temperatures through optimization of phase proportion, and the thermal expansion characteristics are matched with a metal base layer, effectively avoiding the falling risk caused by the difference in thermal expansion of the two, and thus greatly improving the service life and reliability of the material in a high-temperature environment. The high-entropy ceramic material of the application can be widely applied to fields with high demand for high-temperature thermal isolation in aerospace, aviation, automobile industry and the like, is especially suitable for thermal barrier coatings, high-temperature thermal insulation materials and other high-temperature thermal insulation applications, and has important engineering application value.

The utility model relates to the field of heating devices, in particular to a vacuum cavity heating device which comprises a vacuum cavity, a top plate, a heating furnace body, heat insulation pieces, fixing pieces, a graphite heating rod, a graphite heating sheet, a molybdenum wire heat conduction piece and a carrying table, the top plate is installed on the front side of the vacuum cavity, and the heat insulation pieces can be installed on the inner side of the vacuum cavity in a stacked mode and fixed through the fixing pieces. A plurality of graphite heating rods are mounted on the inner side wall of the heating furnace body; graphite heating sheets are mounted at the other ends of the graphite heating rods; a molybdenum wire heat conduction piece is mounted on the outer side wall of the heating furnace body; a carrying table is mounted in the middle section of the inner side of the heating furnace body; the heat insulation piece can reduce heat radiation and heat conduction transmitted by components to the maximum extent, ensure the temperature stability in the heating furnace body and improve the heating efficiency.

This application provides a heating module and an electronic cigarette device, relating to the technical field of electronic cigarette devices. The heating module includes a heating element, an insulating element, and a pin assembly. The heating element forms a heating channel for heating the cigarette. The insulating element is sleeved on the outside of the heating element and has a connecting hole that communicates with the heating element. The pin assembly includes a plurality of pins, at least one of which is at least partially located outside the insulating element and passes through the connecting hole to connect with the heating element. Corresponding to the solution of this application, on the one hand, space can be provided for the heating wire, improving the uniformity of heating; on the other hand, when heating of certain areas is not required, since the pin is at least partially located outside the insulating element, the heat emitted by the pin can be isolated by the insulating element when conducting electricity, reducing heat transfer to the heating channel and thus avoiding heating of certain areas.

This invention discloses a method for methane extraction and closed-loop carbon fixation in coal seams using hot flue gas-driven combustion-explosion fracturing. First, each horizontal branch well is divided into sections, and perforations are constructed in each section. Then, CH4 is used in each section. 4 Combustion-explosive fracturing technology utilizes in-situ synergistic combustion-explosion reactions to generate gas impact perforation fractures, allowing them to further develop and expand into a fracture network. Then, hot flue gas is sequentially injected into each horizontal branch well. Due to its high temperature, the hot flue gas promotes CH4 (chemical oxygen demand) in the coal seam. 4 Gas desorption, and CO in hot flue gas 2 SO 2 NO 2 Due to its competitive adsorption advantage, it can displace a large amount of CH4 adsorbed in extra-thick coal seams. 4 Gas, then hot flue gas and CH 4 The gas continues to be utilized in a closed loop, improving the efficiency of coal seam methane extraction while simultaneously achieving hot flue gas sequestration. Through this continuous closed-loop utilization process, the efficiency of methane combustion and fracturing, hot flue gas sequestration, and CH4 extraction in various areas of extra-thick coal seams is maximized. 4 Extraction efficiency.

The utility model relates to the technical field of box wallboard, disclose a kind of box wallboard structure of high efficiency prevents cold bridge, including refrigeration box, and refrigeration box two sides symmetry are provided with wallboard, and wallboard includes veneer, and fill slot is opened in veneer, and heat preservation board is provided in veneer, and inner layer soft board is provided on veneer, and hollow layer is provided between heat preservation board and inner layer soft board, and hollow layer is filled with argon, and heat insulation in refrigeration box can be realized using heat preservation board, and hollow layer is arranged between inner layer soft board and heat preservation board, when pork impacts inner layer soft board, inner layer soft board will be appropriately deformed, while argon in hollow layer will be compressed, and then the impact force brought by pork impacting inner layer soft board is consumed, while argon is lower than air heat conduction coefficient, to further improve the temperature insulation effect of box wallboard, avoid the heat conduction path at its fracture after heat preservation layer fracture, and then cold bridge appears, improve the refrigeration effect of the pork transported, and guarantee the freshness of pork.

The utility model relates to the technical field of stainless steel pipes, in particular to a thin-wall stainless steel pipe with a coating layer, which comprises an outer pipe and a wear-resistant layer, the wear-resistant layer is processed on the surface of the outer pipe, the inner wall of the outer pipe is fixedly connected with a heat insulation layer, and the inner wall of the heat insulation layer is adhered to a first adhesive layer. The heat insulation layer is arranged between the outer pipe and the inner pipe, heat transfer of the pipe body can be effectively reduced, the stainless steel pipe is suitable for scenes with temperature requirements, the first arc-shaped strip, the supporting strip and the second arc-shaped strip in the supporting mechanism are matched with one another, the structural strength of the pipe body is enhanced, the pipe body is connected with the filler, the overall structure is further stabilized, and the service life of the stainless steel pipe is prolonged. The filler in the noise reduction structure and the inner pipe are machined into the oval shape, turbulent flow resistance is reduced, noise generated by fluid flowing in the pipe or the external environment can be absorbed and weakened, the use experience is improved, the service life of the stainless steel pipe is prolonged, and the use requirements in more scenes are met.

The invention discloses a miniaturized heating cigarette smoking set capable of reducing the surface temperature. Comprising a heating cavity used for containing an aerosol generating substance, a heating system arranged in the heating cavity, a battery cell used for providing energy for the heating system, a control system used for connecting and controlling the heating system and the battery cell, and a supporting system used for fixing all parts and facilitating holding of a user. The supporting system is provided with a heat insulation area for reducing outward diffusion of heat in the heating cavity on the outer side of the heating cavity, and a heat conduction system which is connected with the heating system and the heating cavity and conducts and dissipates heat generated by the heating system and the heating cavity is arranged in the portion, used for being held by a user, of the supporting system. The device serves as a portable electronic product, the portability of the device requires that the size of the product is as small as possible, and the device strives to achieve balance in demand contradictions by reducing the surface temperature of the product through the design of heat insulation, heat conduction and heat dissipation in a small product space.

An end cover structure for improving the lifespan of a range hood motor includes a cover body with a heat dissipation hole at its center. A positioning boss and a bearing mounting seat are formed on the inner end face of the cover body, both coaxially aligned with the cover body. The positioning boss is lower than the bearing mounting seat. A bearing mounting sleeve is provided within the bearing mounting seat and is fixedly connected to it. The bearing mounting sleeve has a through hole that aligns with the heat dissipation hole on the cover body. By enlarging the original bearing mounting position on the end cover and adding a bearing mounting sleeve, the bearing is mounted using the bearing mounting sleeve. When the motor heats up, the bearing mounting sleeve reduces heat transfer between the bearing and the end cover, and it also acts as a buffer, preventing deformation of the bearing mounting position in the end cover due to bearing heat. This improves the service life of the end cover and further extends the lifespan of the motor.

The application discloses a multi-cavity pipeline with a variable heat insulation structure and a manufacturing method thereof. The multi-cavity pipeline comprises an integrally formed pipe body, a first independent flow channel, a second independent flow channel and a heat insulation cavity between the two independent flow channels. The heat insulation cavity extends along the axial direction of the pipe body and can be kept in an unfilled state or filled with heat insulation materials according to the use scene. The manufacturing method comprises extrusion forming a pipe blank, cooling and shaping and filling or not filling the heat insulation cavity according to the heat insulation requirement. The filling mode comprises pre-prepared heat insulation body insertion, on-site foaming filling, injection molding filling or micro-extrusion filling. Through the above structure and method, the same basic pipe blank can form a heat insulation structure form and a heat insulation structure form, adapt to different scenes such as indoor exposed installation, wall concealed laying and outdoor buried installation, reduce the heat conduction between cold and hot flow channels and reduce the mold opening and inventory cost of different specifications of pipe materials.

The application discloses a temperature-limited nested heat pipe heat exchange device and a method thereof, which comprises a cold source heat pipe, a heat source heat pipe, and a nesting part. The cold source heat pipe is internally provided with a working medium one. The heat source heat pipe is internally provided with a working medium two. The nesting part is used for nested connection of the cold source heat pipe and the heat source heat pipe, and internally stores a heat-conducting fluid. When the heat-conducting fluid in the nesting part is different from the external temperature, the contact area of the inner wall of the heat-conducting fluid and the outer wall of the cold source heat pipe changes. The application has the beneficial effects that low-temperature corrosion caused by flue gas acid dew point is avoided, the service life and safe operation of the heat exchange equipment and the production system are ensured, the long service life of the equipment is realized, and the maximum waste heat recycling is realized.

The invention discloses a high-strength acrylic structural adhesive and a preparation method thereof, and belongs to the technical field of structural adhesives. The high-strength acrylic structural adhesive comprises a component A and a component B, the component A comprises an acrylate monomer, a first cross-linking agent, an antioxidant, a polyacrylate elastomer, a polymerization inhibitor, a reducing agent and modified mesoporous silica; the component B comprises an acrylate monomer, a first cross-linking agent, a polyacrylate elastomer, a polymerization inhibitor, an oxidizing agent and modified mesoporous silica; the acrylic ester monomers comprise ethyl methacrylate and lauryl methacrylate; 2, 4, 6-triallylphenol is adopted as the antioxidant; the polyacrylate elastomer is obtained by carrying out composite reaction on 2-acrylamido-2-methyl-1-propane sulfonic acid polymer particles, ethyl acrylate, vanillin methacrylate, an initiator and a second cross-linking agent; the second cross-linking agent is prepared from ethylene glycol dimethacrylate and triallyl phosphite ester.

This invention discloses a process flow for water injection in a hydrogenation unit. It uses condensate from high-pressure (4.0–3.5 MPa) or medium-pressure steam (1.0–2.0 MPa) as the injection water, continuously injected before the amine salt crystallization temperature along with the reaction effluent or before the high-pressure gas heat exchanger, eliminating the need for a continuous water injection point before the air cooler. Compared with existing technologies, this method offers the following advantages: it minimizes the impact of water injection on the heat exchange of the high-pressure medium, maximizing heat recovery; it avoids the risk of intermittent water injection before conventional heat exchangers; it saves on water injection pipelines and valves before the high-pressure air cooler; and it incidentally recovers the heat from the high-temperature condensate, reducing overall plant energy consumption.

The air outlet structure comprises a main body shell, an air inlet cavity, an air inlet, an air outlet cavity, a draught fan and a heating assembly, the main body shell comprises an air inlet part and an air outlet part which are rotatably connected, and the air inlet cavity is formed in the air inlet part; the air inlet is formed in one side of the air inlet part and communicates with the air inlet cavity; the air outlet cavity is arranged in the air inlet part and the air outlet part and is communicated with the air inlet cavity; the fan and the heating assembly are arranged in the air inlet cavity in the flowing direction of air. The air conditioner further comprises a plurality of air outlets, an air guide assembly and a heat insulation cavity. The air guide assembly is arranged in the air outlet cavity and distributes air entering the air outlet cavity to the multiple air outlets, and the multiple air outlets are formed in the air outlet part at intervals; the heat insulation cavity is formed in the air outlet part and surrounds the air outlet cavity and the multiple air outlets, the heat transfer amount of the air outlet cavity or the air outlets to the outer surface of the main body shell is reduced, the rising speed of the temperature of the outer surface of the main body shell is slowed down, and a user can make contact with and adjust the air outlet structure conveniently in the using process.

This invention discloses a high-safety, high-energy-density chalcogenide all-solid-state battery and its preparation method, belonging to the field of all-solid-state battery technology. The battery includes a positive electrode, a chalcogenide solid electrolyte layer, and... SnF2‑In The phase change alloy thermal response layer and negative electrode have a thermal response layer thickness of <5μm, coated only on the outer periphery of the battery and the interface between adjacent batteries. Its operating initiation temperature is 50-100℃ higher than the high-temperature, high-pressure sintering temperature of 570℃. This invention achieves a 99.2% volumetric energy density retention rate by precisely defining the coating area, thickness, and temperature matching relationship of the thermal response layer. The early expansion rate of the thermal response layer after sintering is controlled at 4.8%, the probability of preventing thermal runaway chain propagation between adjacent batteries reaches 95.0%, and the thermal conductivity is reduced by 83% compared to structures without a barrier layer. While ensuring composite safety functions, it does not compromise the core commercial advantages of all-solid-state batteries, and has broad industrialization prospects.

This invention belongs to the field of ablation-resistant thermal insulation composite material preparation technology, specifically relating to a polyacrylonitrile-based hollow carbon fiber for thermal protection materials and its preparation method. The invention first pre-oxidizes porous polyacrylonitrile precursor fibers to obtain porous pre-oxidized fibers. Then, phenolic resin is coated onto the surface of the pre-oxidized fibers through solution polymerization. After impregnation in an organosilicon source solution, rapid Joule heating at high temperature deposits both phenolic carbon microspheres with excellent ablation resistance and a silica coating on the fiber surface, forming a unique hollow carbon fiber structure with excellent thermal insulation properties. This solves the problem that polyacrylonitrile-based carbon fibers cannot simultaneously achieve both thermal insulation and ablation resistance. The thermal conductivity of the polyacrylonitrile-based hollow carbon fiber prepared by this method is about 17% lower than that of porous polyacrylonitrile carbon fibers prepared by traditional carbonization methods, making it applicable to the field of integrated ablation-resistant thermal protection materials.

The utility model provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body, a heat insulation part and a plurality of single batteries, the box body comprises a protection part, a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall define an accommodating area for accommodating a plurality of battery monomers, the protection part is connected to the outer side, deviating from the accommodating area, of the bottom wall, and a filling space is formed between the protection part and the bottom wall; at least one beam body is arranged in the box body, the beam body is connected to the inner side, deviating from the protection piece, of the bottom wall, the beam body is used for dividing the accommodating area into a plurality of sub-areas, and at least one battery monomer is accommodated in each sub-area; the heat insulation component comprises a first heat insulation part and a second heat insulation part, the filling space is filled with the first heat insulation part, and the second heat insulation part is arranged between the beam body and the bottom wall. By arranging the first heat insulation part and the second heat insulation part, the heat insulation capacity of the battery device is improved, and the power and the cost of a heat management system of the battery device are reduced.

The utility model provides a wall insulation board with a rock wool composite structure, which comprises a rock wool heat insulation component, an inner side carrying component, an outer side shielding component, a bolt connection switching component, an expansion fastening component and a covering decoration component, a rock wool core layer of the wall insulation board is formed by stacking rock wool fibers, and air holes are formed in the rock wool core layer; the inner side lining plate made of the calcium silicate plate is fixed to the rock wool core layer through polyurethane glue, the wall face of the inner side lining plate is provided with an internally-connected grid, the grid is immersed and filled with the bonding layer, it is ensured that the rock wool core layer and the inner side lining plate are tightly combined, the bearing capacity of the whole structure is enhanced, and the service life of the wall is prolonged. The outer side lining plate made of the calcium silicate plate is fixed to the rock wool core layer through epoxy resin glue, the wall face of the outer side lining plate is provided with the externally-connected grids, the bonding layer immerses and fills the grids, the bonding strength of the outer side lining plate and the rock wool core layer is improved, and the rock wool core layer is effectively protected.

This disclosure provides a liquefied gas transport container. The liquefied gas transport container includes a first diaphragm defining a cavity. A first insulating layer is disposed around the first diaphragm. The first insulating layer comprises a first closed-cell insulating material. The first closed-cell insulating material comprises a first synthetic foam. A backing material is disposed around the first insulating layer. A housing is disposed around the backing material.

This invention relates to a hot press head and hot press equipment, belonging to the technical field of hot press equipment. It includes a base, a heat insulation block, a heating element, a support member, a first heat dissipation hole, and a pipe connector. The heat insulation block is disposed on the base, and the heating element is disposed on the side of the heat insulation block facing away from the heating element. The support member is disposed between the heating element and the heat insulation block, supporting the heating element on the heat insulation block. The gap between the heating element and the heat insulation block forms a heat dissipation cavity. The first heat dissipation hole is disposed on the heat insulation block, with one end communicating with the heat dissipation cavity. The pipe connector is disposed on the heat insulation block or the base, for sequentially delivering heat dissipation airflow to the first heat dissipation hole and the heat dissipation cavity. This invention significantly reduces the direct contact area between the heating element and the heat insulation block, reduces heat conduction, increases the heating rate of the heating element, and significantly improves heat dissipation efficiency and uniformity.

The utility model relates to the technical field of kitchen appliances, in particular to an electric cooker. The electric cooker comprises a heating disc and a panel, and the heating disc is integrally provided with a mounting ring in the circumferential direction. A mounting hole is formed in the panel, a limiting ring is arranged on the panel in the circumferential direction of the mounting hole, the heating disc penetrates through the mounting hole, the mounting ring is supported on the panel, the side wall of the limiting ring is located between the mounting ring and the heating disc, and the horizontal distance between the limiting ring and the mounting ring is smaller than that between the limiting ring and the heating disc. The limiting ring is closer to the mounting ring and far away from the heating disc, and the temperature of the mounting ring is lower than that of the heating disc, so that the heat transfer amount from the heating disc to the limiting ring is reduced, the heat transfer amount from the limiting ring to the panel is further reduced, and the temperature rise of the panel is effectively reduced. Meanwhile, even if the heating disc is not installed in place due to dimensional tolerance and installation errors, the heating disc cannot make direct contact with the limiting ring, the situation that the heating disc directly transfers heat to the panel through the limiting ring is avoided, and therefore the situation that the temperature of the panel is too high is avoided.

The invention discloses a battery device. The battery device comprises two adjacent single batteries, wherein the side surfaces of the two single batteries are opposite to each other; the heat exchange part is arranged between two adjacent single batteries and extends along the length direction of the side surface, the heat exchange plate extends along the length direction of the side surface, the two opposite sides of the heat exchange plate are respectively attached to the opposite side surfaces of the two adjacent single batteries, and the current collector is arranged at at least one end of the extension direction of the heat exchange plate; a heat-conducting glue layer with the thickness of 0.04-6mm is arranged between the heat exchange plate and the single battery; a plurality of reinforcing ribs extending and penetrating in the length direction are arranged in the heat exchange plate at intervals in the height direction of the heat exchange plate, so that a liquid channel and a non-liquid channel are formed in the heat exchange plate; and the thermal resistance value R1 between the side surfaces of two adjacent single batteries is greater than or equal to 1.5 * 10 <-3 > m < 2 >. K / W and less than or equal to 0.12 m < 2 >. K / W, and the thermal resistance value R2 between the side surfaces of the single batteries and the heat exchange parts is greater than 0 and less than or equal to 0.03 m < 2 >. K The risk of thermal runaway can be reduced while the heat exchange effect of the battery device is improved.

The utility model discloses a warehouse foundation heat preservation structure, which relates to the technical field of heat preservation structures and comprises a waterproof layer, a heat insulation layer, a heat preservation layer and a protective layer, the heat insulation layer is arranged on the upper surface of the waterproof layer, the heat preservation layer is arranged on the upper surface of the heat preservation layer, and the protective layer is arranged on the upper surface of the heat preservation layer. The heat insulation layer, the heat preservation layer and the protection layer are arranged in a staggered mode, and a plurality of drainage grooves are formed in the lower surface of the waterproof layer. The thermal insulation layer and the thermal insulation layer can play a role in thermal insulation, so that loss of heat in a warehouse is prevented, during laying, each thermal insulation layer is laid on the upper surface of the waterproof layer firstly, then laying of each thermal insulation layer and the protective layer is completed in sequence in a peak staggering splicing mode, joints can be staggered mutually, and the thermal insulation layer and the protective layer are spliced in a staggered mode. And a straight-through heat transfer channel is prevented from being formed.

This invention discloses a waste heat recovery device for flue gas from a thermal oil aluminum melting furnace, relating to the field of baking furnace technology. The device includes a furnace, with a support rod fixedly connected to the outer wall of the furnace and an exhaust pipe fixedly connected to the top of the furnace. A furnace opening and closing door is provided on the front of the exhaust pipe, and a waste heat recovery mechanism is installed inside the exhaust pipe. By setting up the waste heat recovery mechanism, while heat is exchanged through inclined heat-conducting plates, the rotation of the inclined heat-conducting plates dynamically disturbs and redistributes the uneven heat distribution of the high-temperature flue gas within the exhaust pipe, continuously reconstructing the flue gas flow field. Through the continuous rotation of each inclined heat-conducting plate within the exhaust pipe, it is ensured that each inclined heat-conducting plate uniformly contacts and exchanges heat with the flue gas at all locations within the exhaust pipe, significantly improving the overall heat transfer efficiency and waste heat recovery rate.

This utility model discloses an adjustable distance self-sealing integrated electrothermal suspended moxibustion device, including a cylindrical moxibustion cylinder with an opening at one end and an end plate at the other end. The inner cavity of the moxibustion cylinder has a moxa stick fixing seat, on which the moxa stick is mounted and faces the opening end of the moxibustion cylinder. It also includes a detachable sealing cap fitted onto the opening end of the moxibustion cylinder and a moxa stick telescopic adjustment mechanism arranged at the axial center of the moxibustion cylinder. A rechargeable electrothermal ignition module is integrated within the sealing cap. The moxa stick telescopic adjustment mechanism is connected to the moxa stick fixing seat to adjust its axial movement, allowing the moxa stick to extend or retract from the moxibustion cylinder. When extended, the burning end contacts the rechargeable electrothermal ignition module to ignite; when retracted, the sealing cap and the moxibustion cylinder form a seal to isolate oxygen and extinguish the ignition. This utility model enables a complete "one-tube integrated" moxibustion process, requiring no external fire source for ignition, has a wide range of applications, and solves the problems of distance adjustment and burns associated with traditional handheld operation, improving safety and portability.

The application discloses low-density monolithic porous carbon and a microemulsion preparation method and application thereof, and relates to the field of foam carbon materials. The porous carbon material comprises a three-dimensional network structure formed by cross-linking and stacking of cavity carbon nanoparticles, and has a density of 0.16-0.35 g / cm 3 ; the phenolic resin is used as a precursor, the foaming agent, i.e., the microemulsion droplet of the imidazole compound, is used as a template, and a green solvent is used, and the monolithic porous carbon is obtained through a sol-gel reaction, drying and pyrolysis. The imidazole compound and the hydrophilic end of the foaming agent interact to form a flexible small-molecule interface film, reduce the interfacial tension and stabilize the emulsion droplet. The foaming agent is decomposed to form a cavity spherical structure during carbonization. The monolithic porous carbon has a developed porous structure and surface hydrophobicity, is beneficial to constructing a high-efficiency electrocatalytic reaction microenvironment, and is reflected in improving the surface reaction gas concentration and inhibiting excessive mass supply, so as to improve the electrocatalytic reaction selectivity. Based on the morphology, pore structure and surface properties, the monolithic porous carbon also has application potential in the fields of water purification and heat insulation and flame retardation.

The application discloses a multi-pass water valve, which comprises a valve body, an actuator and a flange connected to the two ends of the valve body respectively, a cylindrical valve core matched arranged in the valve body, a sealing ring arranged between the cylindrical valve core and the valve body, a plurality of flow channel pipe orifices matched with water plates are arranged on the surface of the cylindrical valve core, so that a plurality of forms of flow channels can be formed by cooperating the sealing ring and the valve body when the cylindrical valve core rotates at different angles, wherein the plurality of flow channel pipe orifices comprise adjacent hot flow channels and cold flow channels, an air layer is arranged between the hot flow channels and the cold flow channels, and the opposite two ends of the sealing ring are respectively provided with first limiting structures, the actuator and the flange are respectively provided with second limiting structures matched with the first limiting structures, so as to limit the sealing ring when the cylindrical valve core rotates. The multi-pass water valve provided by the application can effectively reduce the heat loss between adjacent hot water flow channels and cold water flow channels, and can also limit the sealing ring in the rotation direction of the cylindrical valve, so as to ensure the anti-leakage performance of the multi-pass valve.