44results about How to "Prevent the spread of flames" patented technology

Disclosed is a laminate having flame and chemical resistance, which may be used to form protective fabrics. The laminate contains a first layer of a spunlace fabric having a fire retardant additive applied thereto; and a second layer of a polymeric film.

The invention provides a halogen-free flame-retardant sheath material for a class-1E K3 cable used for a nuclear power station. The halogen-free flame-retardant sheath material mainly comprises the following components: ethylene-vinyl acetate copolymer, maleic anhydride-grafted polyolefin, inorganic fire retardant, a synergistic fire retardant, melamine urate, micro-capsulated red phosphorus, an anti-oxidant, an ultraviolet ray absorber, an aqueous graphene solution, a crosslinking sensitizer and a lubricant, wherein the mass percentage of vinyl acetate in the ethylene-vinyl acetate copolymer is about 20 to 40%, a compatilizer is at least one selected from the group consisting of maleic anhydride-grafted ethylene-vinyl acetate copolymer, maleic anhydride-grafted ethylene-octylene copolymer and maleic anhydride-grafted polyethylene, and the ultraviolet ray absorber is at least one selected from the group consisting of 2-(2'-hydroxy-3',5'-di-tert-pentyl-phenyl)benzotriazole and 2-(2'-hydroxy-3',5'-tert-octyl-phenyl)benzotriazole. The halogen-free flame-retardant sheath material has good flame retardation performance, oil resistance, electrical performance and mechanical performance and can meet the requirement on a generation-III nuclear power station for service life of 60 years.

The invention discloses a manufacturing method of safety fire-resistant medium and high voltage cables. The manufacturing method includes steps of selecting, drawing, annealing, conductor stranding, coextruding and covering of inner shield layers, insulating layers and outer shield layers, setting metal shield layers, isolated-phase extruding of fire-resistant isolated layers, lapping of first tape layers, cabling stranding and cabling tape lapping, extruding of oxygen isolating layers, extruding of fire-resistant isolating layers, lapping of second tape layers, lapping of metal armor layers, lapping of third tape layers and extruding of outer sheath layers. The medium and high voltage cables manufactured by the method have good heat insulation effect when laid on buildings, fire resistance of the cables is improved greatly, damages to an electric power system due to accidents such as fires and natural disasters can be delayed, and time can be gained for rescue work.

A rock dusting composition composed of rock dust, e.g., limestone or other mineral dust, water, pumping aid, and polymer, e.g., acrylamide homopolymers, acrylamide copolymers, and combinations thereof, and a method for applying the composition to the surface of a mine. The composition has a water content and a polymer content sufficient to allow the polymer to (i) disperse water molecules within the composition and, upon drying of the composition, (ii) dissipate forming void spaces in the dried composition. The composition is useful for suppressing propagation of a flame and / or fire caused by ignition of coal dust and / or gas within a coal mine.

A rock dusting apparatus comprising: a housing; a tank mounted within the housing which comprises a removable top wall member, a sidewall member and a bottom wall member configured to form an internal tank compartment for holding and mixing a rock dust composition; a mixer positioned on the bottom wall member for mixing the rock dust composition; a tank discharge port positioned on the bottom wall member or a lower portion of the sidewall member through which the rock dust composition can be discharged from the tank; a conduit extending from the tank discharge port to a housing discharge port; the conduit comprising a pump for transporting the rock dust composition through the conduit and through a discharge line operatively connected to the housing discharge port; and one or more motors mounted within the housing for powering the mixer and the pump. The apparatus is useful for spraying rock dust compositions for suppressing propagation of a flame and / or fire caused by ignition of coal dust and / or gas within a coal mine.

Disclosed is a laminate having flame and chemical resistance, which may be used to form protective fabrics. The laminate contains a first layer of a spunlace fabric having a fire retardant additive applied thereto; and a second layer of a polymeric film.

A rock dusting composition composed of rock dust, e.g., limestone or other mineral dust, water, pumping aid, and polymer, e.g., acrylamide homopolymers, acrylamide copolymers, and combinations thereof, and a method for applying the composition to the surface of a mine. The composition has a water content and a polymer content sufficient to allow the polymer to (i) disperse water molecules within the composition and, upon drying of the composition, (ii) dissipate forming void spaces in the dried composition. The composition is useful for suppressing propagation of a flame and / or fire caused by ignition of coal dust and / or gas within a coal mine.

Disclosed is a fireproof protection method for a cable connector used in a humid environment. A fireproof protection box for the cable connector used in the humid environment is adopted; a non-inflammable dehumidifying material is arranged at the bottom of the fireproof protection box; a normally-closed dampproof and fireproof heat dissipation part, and a temperature-humidity sensor which is in communication with the dampproof and fireproof heat dissipation part are arranged on the fireproof protection box; when the temperature-humidity sensor detects that a real-time temperature in the fireproof protection box is not greater than a preset warning value, the dampproof and fireproof heat dissipation part is controlled to be closed; when the real-time temperature in the fireproof protection box is greater than a first preset warning value and the cable connector is overheated, the dampproof and fireproof heat dissipation part is controlled to be opened; and when the real-time temperature in the fireproof protection box is greater than a second preset warning value and the cable connector is combusted, the dampproof and fireproof heat dissipation part is controlled to be closed. By adoption of the fireproof protection method, effective dampproof protection on the cable connector is realized, thereby promoting heat dissipation of the cable connector, effectively reducing explosion or fire caused by heat accumulation; and in addition, in case of breaking out of fire, fireflow can be effectively blocked to prevent fire from spreading to other cables laid in the same tunnel.

Gas burner, preferably for domestic use, of the type comprising at least one fuel gas injector and at least one corresponding Venturi effect mixer, wherein the above-mentioned injector faces the intake section of said Venturi effect mixer, and one or more passages for the transit of primary air from above the supporting surface, to which the burner is fixed, to the intake section of the Venturi effect mixer. The burner is also provided with means for preventing flame propagation, of the fluid flow splitting type, which comprises at least one substantially tubular body, with relative lateral walls extending at least between the injector and the intake section of the Venturi effect mixer, advantageously consisting of at least one helically wound filiform element.

An electric cable connecting head fireproof protection box for a non-humid environment is disclosed. The electric cable connecting head fireproof protection box is provided with a fireproof heat dissipation part which is normally switched on and a temperature sensor which is in communication with the fireproof heat dissipation part. When the temperature sensor detects that real time temperature inside the fireproof protection box does not exceed a preset alarm value, the fireproof heat dissipation part is controlled to be normally switched on; when the temperature sensor detects that the real time temperature inside the fireproof protection box exceeds the preset alarm value and a fire hazard occurs, the fireproof heat dissipation part is controlled to be switched off; when an electric cable connecting head explodes due to quick build-up of internal heat while the real time temperature inside the fireproof protection box does not exceed the preset temperature alarm value, the fireproof heat dissipation part which is normally switched on can provide an effective pressure release channel, and the the fireproof heat dissipation part is controlled to be switched off when the fire hazard occurs subsequently. The electric cable connecting head fireproof protection box can facilitate heat dissipation of the electric cable connecting head, and explosion accidents or fire hazard caused by heat build-up can be effectively reduced; once the fire hazards occur, fire tongues can be effectively blocked, and fire can be prevented from extending to other electric cables that are laid in the same tunnel.

The invention discloses a fusing type cable joint fireproof protection box used in non-moisture environment. The inner side of the fireproof protection box is provided with a cavity used for accommodating a cable joint. The fireproof protection box is provided with a fireproof heat dissipation part and a fusing type driving mechanism connected with the fireproof heat dissipation part. The fusing type driving mechanism has a melting point cooperated with a preset temperature alarm value. When a real-time temperature in the fireproof protection box does not exceed the preset temperature alarm value, the fireproof heat dissipation part is in a normally open state. When the real-time temperature in the fireproof protection box exceeds the preset temperature alarm value, and a fire hazard happens, the fusing type driving mechanism is fused, and the fireproof heat dissipation part is closed. The fusing type cable joint fireproof protection box is advantageous in that the heat dissipation of the cable joint is facilitated, and an explosion or fire hazard accident caused by heat energy concentration is effectively reduced; once the explosion or the fire hazard happens, flames are effectively isolated, and the fire is prevented from spreading to other cables disposed in the same tunnel.

The invention discloses a production method of fireproof middle and high voltage cables. The production method includes the following steps: sorting; wire drawing; annealing; conductor stranding; inner shielding layer, insulation layer and outer shielding layer co-extrusion and warping; metal shielding layer arranging; first wrapping tape layer lapping; cabling stranding and cabling wrapping tape layer lapping; oxygen isolation layer extrusion; package fireproof isolation layer extrusion; second wrapping tape layer lapping; metal armor layer lapping; third wrapping tape layer lapping and outer sheath layer extrusion. The middle and high voltage cables produced in the production method have good heat insulation effect when being paved on buildings, are improved in fireproof performance, can delay damage to a power system caused by fire disasters, natural disasters and other accidents, and gains time for rescue.

The invention discloses a manufacturing method of safety fire-resistant medium and high voltage cables. The manufacturing method includes steps of selecting, drawing, annealing, conductor stranding, coextruding and covering of inner shield layers, insulating layers and outer shield layers, setting metal shield layers, isolated-phase extruding of fire-resistant isolated layers, lapping of first tape layers, cabling stranding and cabling tape lapping, extruding of oxygen isolating layers, extruding of fire-resistant isolating layers, lapping of second tape layers, lapping of metal armor layers, lapping of third tape layers and extruding of outer sheath layers. The medium and high voltage cables manufactured by the method have good heat insulation effect when laid on buildings, fire resistance of the cables is improved greatly, damages to an electric power system due to accidents such as fires and natural disasters can be delayed, and time can be gained for rescue work.

Disclosed herein are pressure attenuator devices for rotating electrical machines, The pressure attenuation device contains a screen with a plurality of openings, wherein the screen is positioned within the internal cavity and configured to segregate a flame front propagating from an ignition source formed by a combustion process originated in the cavity. Thus, with the use of the pressure attenuation device, an expressive reduction of pressure inside the cavity of the rotating electrical machine is obtained.

An electronic unit defines an interior and includes a circuit card assembly disposed in the interior. An enclosure surrounds five sides of the interior. A sixth side of the interior is closed by a circuit card assembly. The circuit card assembly is coated with a metal layer configured to contain flame within the interior

Disclosed herein are pressure attenuator devices for rotating electrical machines, The pressure attenuation device contains a screen with a plurality of openings, wherein the screen is positioned within the internal cavity and configured to segregate a flame front propagating from an ignition source formed by a combustion process originated in the cavity. Thus, with the use of the pressure attenuation device, an expressive reduction of pressure inside the cavity of the rotating electrical machine is obtained.

The invention relates to a method for preparing graphene-modified flame-retardant water-based polyurethane coatings and adhesives. First, MOFs are used to prepare flame-retardant MOFs composites, and then flame-retardant MOFs composites are used to prepare flame-retardant MOFs dispersions. Finally, polymers are used Polyurethane coatings and adhesives prepared from polyols, isocyanates, dibutyltin dilaurate and flame-retardant MOFs dispersions. It has outstanding effects in improving two important indicators of polyurethane coatings and adhesives, flame retardancy and antistatic.

A battery module, includes a battery cell stack in which a plurality of battery cells are stacked; and a heat dissipation plate coupled to one side of the battery cell stack to discharge heat generated in the battery cells externally, wherein the battery cell stack includes a first blocking member formed of an insulating material and disposed between the plurality of battery cells to provide a plurality of insulating spaces, wherein the plurality of battery cells are distributedly disposed in the plurality of insulating spaces.