149results about How to "Isolated transmission" patented technology

Provided is a method for active explosion proofing and explosion suppression through high-pressure inert gas. The method for active explosion proofing and explosion suppression through the high-pressure inert gas is applicable to prevention and suppression of gas explosions in a closed pipeline without external decompression space, and is particularly applicable to prevention and suppression of gas explosions in a coal mine. The method for active explosion proofing and explosion suppression through the high-pressure inert gas comprises the steps that wall grooves are constructed in a mine laneway, and a high-pressure gas source and a signal receiving and processing system are installed; a plurality of ejectors are distributed on the laneway side and a roof in an array mode at intervals, the ejectors are communicated through high-pressure rubber hoses, and pressure sensors which are connected with the signal receiving and processing system are arranged in the portions, on the two sides of each ejector, of the laneway respectively, wherein the laneway side and the roof are arranged on the same section of the mine laneway; the sensors are installed in the laneway, and receive shock wave signals, and the high-pressure inert gas source ejectors and connecting pipelines of the high-pressure inert gas source ejectors are installed; when the gas explosions happen, the sensors detect the forwards-moving shock wave signals, a solenoid valve is started, gas of the high-pressure inert gas source is ejected through the ejectors, a high-pressure inert gas curtain is formed in the laneway, and spread of explosion shock waves is obstructed.

The invention relates to a high-flame-retardant DOPO functionalized graphene oxide/ZIF-8 composite material and a preparation method thereof, wherein the composite material has a synergistic flame retardant effect; compared with a single-component flame retardant, the flame retardant property of the composite material is more excellent. The preparation method comprises the following steps: dissolving 1.5-3.0 parts of zinc nitrate into 8 parts of deionized water, magnetically stirring the mixture for 10min, then adding 0.3-0.6 part of DOPO functionalized graphene oxide, stirring the mixture, and carrying out ultrasonic treatment for 30min to obtain a solution A; dissolving 28.7-57.4 parts of 2-methylimidazole into 80 parts of deionized water, magnetically stirring the mixture for 10 minutesto obtain a solution B, pouring the solution B into the solution A, and stirring the mixture for 120 minutes; centrifuging a reaction product for 10 min at 10000 r/min, repeatedly washing the reaction product with deionized water, and drying the reaction product at 65 DEG C so as to obtain the DOPO functionalized graphene oxide/ZIF-8 composite material.

A damping ring is provided for isolating vibration between a fixing member and a structure. The damping ring includes a body and a protruding lip formed on the body. The body is installed on the structure and has a through hole opened along the central axis of the body, and the through hole is provided for the fixing member to be inserted therein. The protruding lip is formed on the edges of a opening of the through hole and surrounds the opening, and the protruding lip extends outwardly along the central axis of the body, and extends inwardly along the radial direction, so as to contact with the fixing member, such that a gap is formed between the fixing member and the body instead of directly contacting the fixing member with the body, thus vibration transmitted between the fixing member and the structure is cushioned and isolated.

Disclosed is a powertrain mount capable of being installed between a powertrain of a vehicle and a structural body of the vehicle supporting the powertrain to isolate vibration being transmitted between the powertrain and the structural body. The powertrain mount includes a bracket capable of being mounted on the powertrain or the structural body. The bracket has a rubber holder for receiving and supporting a rubber member thereinside. A slant support means is disposed inner side of the rubber holder and disposed slantly with respect to the horizontal plane of the vehicle. The slant support means is provided with a support member connector to which a support member installed in the powertrain can be connected. A rubber member is bonded with outer circumferential surface of the slant support means while surrounding the slant support means. The rubber member is accommodated in the rubber holder in compressed state but not bonded with the bracket to thereby resiliently support between the slant support means and the bracket. The rubber member has a through-hole formed around both ends in slant direction of the slant support means to thereby reduce dynamic stiffness in slant direction.

The invention discloses a supporting noise reduction system for a combustion gas turbine mobile power station, and relates to the technical field of prevention of noise pollution. The system comprisesa sound insulation box body used for mounting a combustion gas turbine, wherein the bottom of the sound insulation body is fixedly mounted on a suspending body frame through a sound attenuation system underframe, and wheels are mounted at the bottom of the suspending body frame; an inlet gas sound attenuation system is connected to one end of the sound insulation box body, and an intake air soundattenuation system is arranged above the inlet gas sound attenuation system and communicates with a gas inlet of the sound insulation box body; and a first-stage exhaust sound attenuation system is arranged at the top of the other end of the sound insulation box body, a second-stage exhaust sound attenuation system is mounted at the top of the first-stage exhaust sound attenuation system, and thefirst-stage exhaust sound attenuation communicates with an exhaust port of the sound insulation box body. According to the supporting noise reduction system for the combustion gas turbine mobile power station, noise produced by the combustion gas turbine during working is reduced, and the working environment is protected.

The invention provides a phosphaphenanthrene compound and a preparation method and application thereof. The compound is a compound shown in the formula I or a stereisomer, a geometrical isomer, a tautomer, a hydrate, a solvate, ester and pharmacologically acceptable salt of the compound shown in the formula I, wherein R, X and Y are as defined as in the instruction book. The compound has the goodsynergistic flame retardation effect, can be served as a fire retardant, is suitable for flame retardation in high polymer materials, and is particularly suitable for preparing the high polymer materials such as epoxy resin with the flame retardation property. The formula I is shown in the description.

The invention discloses environment-friendly nano modified halogen-free flame retardant polypropylene and a preparation method thereof. The environment-friendly nano modified halogen-free flame retardant polypropylene comprises the following raw materials in parts by weight: 66 parts of polypropylene matrix, 20 parts of halogen-free expanded flame retardant, 2 parts of conductive packing, 1-3 parts of nano modified particles, 1-3 parts of additive, 5 parts of compatilizer, 1 part of an antioxidant and 2 parts of a lubricating agent. The preparation method comprises the following steps: evenly mixing the polypropylene matrix, the compatilizer, the antioxidant and the lubricating agent by virtue of a high-speed mixer, and then putting the mixed material into a precision open mill; after the mixed material is melted, adding the halogen-free expanded flame retardant and the conductive packing, melting and mixing; and then adding the nano modified particles and the additive; and mixing in the precision open mill, thus obtaining polypropylene. According to the environment-friendly nano modified halogen-free flame retardant polypropylene, the nano modified particles and hollow glass beads are adopted as flame retardant synergists, so that the flame retardant property of the polypropylene can be improved, the viscosity of polypropylene polymer melt can also be significantly reduced, the processability is improved, the heat stability is improved, and the environment-friendly nano modified halogen-free flame retardant polypropylene is excellent in yellowing resistance, good in impact resistance and good in bending strength.

The invention discloses a microvibration prevention building structure and a constructing method thereof. Multiple microvibration prevention measures are taken, and the method comprises the steps that environmental vibration testing and geological exploration are carried out on a planned site in an early stage, and a plot which is away from main lines of communication and away from factories having large machinery is selected; and the anti-microvibration rigidity of a building is enhanced by constructing structures, such as pile foundations, raft foundations, densified column nets, dense-hole floors and microvibration prevention walls. A power area, support areas and a production area are separated, and block-by-block and layer-by-layer pouring and vibration are carried out on concrete structures, such as ultra-thick and large-size rafts, the dense-hole floors and the microvibration prevention walls during construction, so that quality of concrete is ensured, the production plant building meets the anti-microvibration requirement of precision production equipment, the traditional thinking mode that anti-microvibration can only be performed from certain aspect is changed, for example, vibration isolators or other vibration isolation devices can be installed on precision equipment, and thus the microvibration prevention building structure has certain reference and enlightening significances for people constructing other similar buildings in the future.

The invention provides a graphene coating electrothermal needle for high-efficiency heat production. The graphene coating electrothermal needle comprises a tubular hollow needle body, a bevel connection needle tip integrated with the tubular hollow needle body, an insulated heat insulating coating and graphene coating of nano-silica gel which are attached to the outer surface of the hollow needlebody, an insulated conductor penetrating through the hollow needle body and the graphene coating to form a closed loop, a connection point between the insulated conductor and the graphene coating andan insulated needle handle used for pinch; the needle body is coated with the insulating coating and the graphene coating in sequence, and the heat production part is the graphene coating, the heat production efficiency is higher, and the graphene coating electrothermal needle is superior to existing most electrothermal materials; the positive and negative electrodes of a power supply are connected to the upper and lower ends of the graphene coating through the insulated conductor respectively, the current does not flow through the needle body, the heat production position is precise, and thetemperature is easy to control. The graphene coating electrothermal needle for the high-efficiency heat production has the advantages that the structure is simple, the use is convenient, the graphenecoating electrothermal needle is safe and reliable, the needle handle insulates heat, and the fine operation of a needle operator cannot be disturbed.

The invention provides a high-power fiber laser modular heat management device capable of realizing spatiotemporal modulation of temperature distribution. The high-power optical fiber laser modular heat management device comprises a modular water cooling disc (1), a control module (2), a control bus (3), a data bus (4) and a temperature rapid regulation and control module (5). The modular water cooling disc (1) comprises a plurality of optical fiber temperature adjusting pieces (11) for adjusting the temperature of high-power laser optical fibers fixed thereto to be within a specified norm value or range. The number of the temperature rapid regulation and control modules (5) is the same as that of the optical fiber temperature adjusting pieces (11), and the temperature rapid regulation andcontrol modules are in one-to-one correspondence connection with the optical fiber temperature adjusting pieces (11). The control module (2) is connected with the plurality of temperature rapid regulation and control modules (5) through the control bus (3); and the control module (2) is connected with the optical fiber temperature adjusting pieces (11) through the data bus (4) and is used for acquiring temperature data of the optical fiber temperature adjusting piece (11) so as to form an adjusting and controlling instruction for controlling the temperature rapid regulation and control modules (5).

The invention provides a fireproof mineral silicone rubber composition, a fireproof mineral silicone rubber material, a preparation method thereof and a power line containing the fireproof mineral silicone rubber material. The fireproof mineral silicone rubber composition comprises, by weight, 50-100 parts of methyl vinyl silicone rubber, 30-50 parts of montmorillonite, 5-10 parts of quaternary ammonium salt surface modifier, 10-20 parts of low-melting-point glass powder, 30-50 parts of aluminum hydroxide and 5-10 parts of polyol. A ceramic layer structure formed by the fireproof mineral silicone rubber composition is stable and even in mechanical performance distribution, and the toughness and fireproof performance of the power line is further increased when the ceramic layer structure is used as the sheath of the power line.

The invention relates to an environment-friendly flame-retardant ternary composite material POSS/GO/ZIF-8 and a preparation method thereof. With the rapid development of the China and the increasinglyenhanced environmental protection, safety and health consciousness, the flame retardant property and environmental protection property of existing flame retardant materials cannot meet the requirements of people. According to the invention, graphene oxide (GO), polyhedral oligomeric silsesquioxane (POSS) and a zeolite imidazole framework material (ZIF-8) are compounded so as to prepare the ternary composite material. Compared with a single-component flame retardant and a binary composite flame retardant, the flame retardant property of the ternary composite material is improved, and meanwhile, the environmental protection requirement is met; and ultrasonic waves are used for dispersion in the preparation process of the ternary composite material, so it is guaranteed that dispersion liquidis stable, uniform and free of agglomeration, the process is simple, and feasibility is high.

The invention relates to a liner structure of an electric griddle. The liner structure is arranged at the bottom of a grilling pan, and the liner structure comprises an inner sealed tray and an outer sealed tray; a plurality of convex portions are arranged at the bottom of the outer sealed tray; the convex portions are fixedly connected to the bottom of the inner sealed tray; the outer walls on four sides of the inner sealed tray and the outer walls on four sides of the outer sealed tray keep gaps and the tops of the inner sealed tray and the outer sealed tray are flush; a supporting plate is arranged on the inner sealed tray; U-shaped electric heating pipes are arranged on the inner sealed tray; the U-shaped end of each of the U-shaped electric heating pipes is fixedly arranged on the supporting plate, and the electrifying ends of each of the U-shaped electric heating pipes are fixedly arranged on one of the sidewalls of the inner sealed tray; and the electrifying ends sequentially run through the inner sealed tray and the outer sealed tray. The electric griddle makes use of the liner structure of the electric griddle. Through air thermal insulation by separating inner and outer layers, heat transfer of the liner is effectively avoided; and meanwhile, the use of a thermal insulation material in a conventional structure is avoided, so that the electric griddle is relatively low in cost.

The invention discloses an intelligent temperature transmitter with a protection function, and belongs to the field of temperature transmitters, the intelligent temperature transmitter with the protection function comprises a transmitter body and a thermocouple, the outer side of the transmitter body is sleeved with a protection shell and a shell cover, the outer side of the thermocouple is sleeved with a sheath, and a quick locking mechanism is arranged between the protection shell and the shell cover. The top end of the sheath is provided with a container connecting piece, the top of the container connecting piece is fixedly provided with an adapter tube, the sheath is detachably connected to the bottom end of the adapter tube through a threaded structure, the top end of the thermocouple is fixedly provided with a sliding block, the thermocouple is slidably connected to the inner wall of the adapter tube in a sleeving mode through the sliding block, and the inner wall of the adapter tube is provided with a conductive sliding rail; and a conductive contact matched with the conductive slide rail is arranged on the slide block. According to the invention, over-temperature retraction protection and shock absorption and heat insulation protection can be autonomously carried out, and compared with the traditional technology, the structure is simple, the service life is longer, the market prospect is achieved, and the intelligent temperature transmitter is suitable for popularization.

The invention discloses a phosphonate structure-containing ionic monomer and a flame-retarding and smoke-suppressing ionomer synthesized under the catalysis of the ionic monomer, and preparation methods and applications thereof. The flame-retarding and smoke-suppressing ionomer is a copolyester monomer prepared from a binary acid or an ester thereof and a C2-C8 polyol through successively carryingout an esterifying reaction and a polycondensation reaction with the phosphonate structure-containing ionic monomer as a catalyst. The phosphonate structure-containing ionic monomer has an excellentcatalytic capability, can well catalyze an ester exchange reaction and a melt phase polycondensation reaction to obtain the ionomer with a high polymerization degree, and also can catalyze carbon formation during combustion so as to make the ionomer have good flame-retarding and smoke-suppressing effects, and a methyl ester bond in the ionic monomer can be connected to a polyester main chain to avoid migrate-out and environment pollution, thereby the ionomer can be used in textile fibers, engineering plastics and packaging materials. The preparation method is mature, simple and convenient, andis easy for industrial production.

The invention provides a multifunctional composite current collector, the multifunctional composite current collector comprises a base material layer, bonding layers, a metal layer and a temperature response layer, the bonding layers are respectively arranged on two opposite surfaces of the base material layer, the metal layer is arranged on the surface, far away from the base material layer, of the bonding layer, the temperature response layer is arranged on the surface, away from the base material layer, of the metal layer, and the surface of the current collector is coated with the temperature response layer, so that sensitive response can be achieved when an active substance releases heat, and electron transmission is isolated in time.

The invention relates to a thermal-radiation-resistant high-temperature-resistant sweat-absorbing T-shirt. The T-shirt comprises a T-shirt body (1), wherein armpit portions, the front chest portion, and the back portion of the T-shirt body (1) are all provided with sweat-absorbing cloth (2), the sweat-absorbing cloth (2) is arranged on the inner layer of the T-shirt body (1) and is made of a bamboo and jute fiber blended yarn knitted fabric, and the fabric is sewn to form the T-shirt body (1). The inner layer of the fabric is aluminum silicate fiber layer, the middle layer of the fabric is an adhesive layer, the outer layer of the fabric is a high-temperature-resistant protective layer, the three layers are compounded to form a whole, and the adhesive layer is a polyurethane adhesive layer. Due to the fact that the armpit portions, the front chest portion and the back portion of the T-shirt body (1) are all provided with the sweat-absorbing cloth (2), sweat can be effectively absorbed, people feel comfortable to wear the T-shirt, and the T-shirt is thermal-radiation-resistant and high-temperature-resistant.

The invention discloses a double-layer self-breathing thermal-insulation squat silo, which comprises a silo wall and a tapered silo top. A sealed upper gallery is arranged in the center of the tapered silo top; a top cover is arranged above the tapered silo top; an air space is formed between the top cover and the tapered silo top; an exhaust outlet communicating with the air space is arranged between the top cover and the sealed upper gallery; an air inlet is arranged between the top cover and the edge of the tapered silo top; a rain shielding mechanism is arranged on the exhaust outlet. Through the inclined air space arranged above the silo top, air enters from the lower end and is exhausted from the upper end to take heat in the air space away, and a chimney effect is utilized, so that the temperature of the surface of the silo top is greatly reduced, and thus the temperature in the squat silo is reduced.

The invention discloses a hurricane-resistant sound-insulating and heat-insulating window which comprises a wall body. The wall body is internally provided a sealed window frame. The sealed window frame is fixedly connected with the wall body through screws. The sealed window frame is internally provided with an aluminum alloy glass frame. The aluminum alloy glass frame is internally provided withinternal glass and external glass. A closed space formed among the front end surface of the external glass, the back end surface of the internal glass and the aluminum alloy glass frame is an interlayer. The interlayer is internally provided with a supporting frame. The front side surface and the back side surface of the supporting frame are provided with silica gel contacts. The back end surfaceof the external glass is provided with a titanium dioxide coating. The front end surface of the external glass is provided with an energy-saving film layer. The front end surface of the energy-savingfilm layer is provided with a PVB film layer. The hurricane-resistant sound-insulating and heat-insulating window has advantages of dispersing a pressure which is bear by the glass, improving safetyperformance of the window, protecting property of the people, and improving heat insulating effect and sound insulating effect of the glass.

The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to a nano-foam oil-displacing agent and a preparation method thereof. The oil-displacing agent comprises the following components in percentage by weight: 10-45% of an anionic surfactant, 7-15% of a zwitterionic surfactant, 6-12% of oily nanoparticles, 5-10% of a stabilizer, 1-2% of a dispersingagent and the balance of water. The preparation method of the oil-displacing agent comprises the following steps: preparing oily nanoparticles from solid paraffin and isocaprylic acid, dispersing theoily nanoparticles in water, conducting uniform mixing with a surfactant, and adding a stabilizer and water to prepare the nano-foam oil-displacing agent. The nano-foam oil-displacing agent can effectively inhibit gas diffusion, enhance the mechanical stability and viscosity of a liquid film, effectively prevent external heat from being transferred to the inside, reduce the molecular thermal motion rate, greatly reduce the liquid separation rate of a foam liquid film, enhance the stability of foam and further improve the oil-displacing efficiency.

The invention discloses a high frequency signal linear optical coupler isolation transmission circuit capable of reducing noise. The high frequency signal linear optical coupler isolation transmission circuit capable of reducing the noise comprises operational amplifiers N1, N2 and N3, a linear optical coupler N4 and resistors from R1 to R5, wherein all the above components are connected through a PCB (printed circuit board) lead wire, the operational amplifier N1 and the resistor R1 form a negative feedback amplifier circuit of the linear optical coupler, the operational amplifier N2 and the operational amplifier N3, the resistor R2 and the resistor R4, and the resistor R3 and the resistor R5 respectively form coupled current signal amplification circuits, and current signals in the linear optical coupler are amplified, and respectively used as input of the negative feedback amplifier circuit and isolation transportation signal output of the linear optical coupler. Current signals in the linear optical coupler is small in magnitude and easily influenced by the noise, but current signals after being amplified can effectively reduce noise influences, and interference resistance of transmission signals is improved. Simultaneously, a negative feedback circuit uses a current amplification mode, a capacitor is removed form the negative feedback circuit, and therefore the bandwidth of the linear optical coupler can be significantly improve roved, and transmission of high frequency signal is isolated.

The invention provides a monomolecular intumescent flame retardant MPPR and MPPR/POSS composite synergistic halogen-free flame-retardant polypropylene composite material, and particularly relates to a monomolecular intumescent flame retardant MPPR and a preparation method thereof, an MPPR flame retardant polypropylene composite material containing the monomolecular intumescent flame retardant MPPR and a preparation method of the MPPR flame retardant polypropylene composite material, and an MPPR/POSS composite synergistic halogen-free flame-retardant polypropylene composite material and a preparation method of the MPPR/POSS composite synergistic halogen-free flame-retardant polypropylene composite material. The monomolecular intumescent flame retardant MPPR comprises the following raw material components: phytic acid, polyol and melamine, wherein the molar ratio of phytic acid to polyol to melamine is 1:(2.4-2.6):(1.9-2.1). The preparation method of the monomolecular intumescent flame retardant MPPR comprises the following steps: stirring phytic acid and polyol to react, and then adding melamine to react. The prepared flame-retardant polypropylene composite material is high in flame-retardant efficiency and high in mechanical strength, and can meet the requirements of flame-retardant PP on high-strength and high-modulus application occasions.

The invention discloses a novel box-type transformer substation, relates to the technical field of transformer substations. The novel box-type transformer substation comprises a box and a base. The box is composed of wallboards on the periphery and a slope-shaped cover board at the top end. The novel box-type transformer substation is characterized in that each wallboard is composed of an outer wallboard, a vacuum board and an inner wallboard, and the vacuum boards are bonded between the inner wallboards and the outer wallboards; the slope-shaped cover board is composed of an upper cover board, a vacuum board and a lower cover board, and the vacuum board is bonded between the upper cover board and the lower cover board. The novel box-type transformer substation has high ventilation efficiency, is ventilated completely naturally without other apparatuses, and can effectively isolate external heat from the inside thereof and isolate substantial noises generated by instruments therein from the outside.

The invention relates to a building integrated photovoltaics (BIPV) layered hollow glass curtain wall structure, which comprises front glass and rear glass, wherein a front ethylene vinyl acetate (EVA) layer, a photovoltaic solar cell layer, a rear EVA layer and a tedlar/polyethylene glycol terephthalate/tedlar (TPT) layer are sequentially arranged between the front glass and the rear glass; a space interlayer is formed between the TPT layer and the rear glass; a terminal box connected with the photovoltaic solar cell layer is arranged behind the rear glass; a fixed clamping frame is arranged at the periphery between the front glass and the rear glass; and a filtering membrane is arranged in front of the front glass. When receiving sunlight, the curtain wall structure can reflect solar rays beyond the range of between 0.4 and 1.1 micrometers, so the temperature of a glass curtain wall assembly is reduced, the service life of the integral assembly is prolonged, the heat-insulating effect of the assembly is better than that of the conventional hollow glass curtain wall, the transfer of indoor and outdoor heat can be isolated effectively, energy loss is reduced, and the energy conservation of buildings is realized.