33results about How to "Not easy to fire" patented technology

The invention relates to an aluminum alloy heat insulation fireproof window. The aluminum alloy heat insulation fireproof window comprises a window frame, a window sash, reinforcing supports and a glass protection frame, wherein the window frame is fixedly installed on a wall through a clamping type fixing piece, hollow cavities are formed in the window frame and the window sash, the reinforcing supports are arranged in the middles of the hollow cavities, and the hollow cavities are filled with a fire-resistant and heat-insulating filling material. The fireproof window further comprises a mullion used for fixing glass and supporting the window frame. The window frame, the window sash, the mullion, the glass protective frame, the reinforcing supports and corner connectors are fixedly linkedwith each other, it is guaranteed that the whole window is connected into a whole, and it is guaranteed that the window cannot be split or disengaged due to wind power, fire and other external factors; the split or falling resistance of the glass is enhanced through the glass protection frame; and the whole window is reasonable in structure, the wind pressure resistance, the air tightness, the water tightness and the fire resistance integrity of the whole window are improved to a certain extent on the premise that the material cost economy of the whole window is fully considered, and the practicability is high.

The invention discloses a roasting gun device. The roasting gun device comprises a support, a gun body and a gun head, wherein the middle part of the gun body is of a sleeve structure with an inner layer charged with fuel gas and an outer layer charged with compressed air, a bearing seat for allowing the gun body to rotate around the support is arranged on the rear part of the gun body, and a fuel gas connector and a compressed air connector are formed in the rear part of the gun body; a fuel gas-air mixing pipe and a secondary mixing and decompression pipe for supplementing air and balancing a gas pressure are arranged on the front part of the gun body; the support is used for installing and supporting the gun body and enabling the gun body to rotate and move around an axis in the horizontal direction; a main fire hole is formed in the middle of the gun head, and 18-28 auxiliary fire holes are distributed around the gun head; and the outer layer of the gun head is a heat-collecting cover. According to the roasting gun device disclosed by the invention, a fuel and air are uniformly mixed, air needed for combustion can be automatically balanced, and the temperature of the gun head can be lowered, so that the problems of poor roasting effect and unsafety of unshaped casting material products in scrap copper smelting, and anode copper casting dies are solved.

The invention provides a picking head of a fully-automatic cotton picker, which comprises a jacket, a cotton picking finger, a needle base and a telescopic rod, wherein the jacket is a cavity cylinder with openings in two ends, the radius of the tail end of the cavity cylinder is more than that of the head end of the cavity cylinder, a plurality of needle holes in the same straight line are arranged in the head end of the cavity cylinder, the cotton picking finger is fixedly connected to the head end of the jacket, an opening of the head end of the jacket is sealed, the needle seat is shaped as a strip plate and is positioned in the jacket cavity, a plurality of cotton picking needles corresponding to the needle holes are arranged on the needle seat, the upper ends of the cotton picking needles can penetrate through the needle holes to be exposed out of the jacket, the lower ends of the cotton picking needles are fixedly connected to the upper surface of the needle base, an elastic part is arranged in a space enclosed by the upper surface and the inner wall of the jacket, the telescopic rod is arranged in the jacket, the head end of the telescopic rod is positioned in a space enclosed by the lower surface of the needle base and the inner wall of the jacket, one surface of the head end of the telescopic rod is jointed with the lower surface of the needle base, and the tail end of the telescopic rod is exposed out of the tail end of the jacket. The picking head has the advantages of good safety and good quality of picked cotton.

The invention discloses a material for building decoration. The material for building decoration is prepared by the following raw materials in parts by weight: 40-60 parts of calcite, 40-60 parts of PVC (Poly Vinyl Chloride), 1-2 parts of sodium chloride, 1-3 parts of paraffin wax and 1-2 parts of stabilizer. The main materials of the material for building decoration include the calcite and the PVC, and the specific weight of the calcite and the PVC accounts for above 93% of that of all the raw materials, and a base material prepared by the calcite and the PVC has the most direct advantages of being lighter than a ceramic tile and being non-deformed and difficultly corroded in a wet environment and the like; the decoration material prepared by the base material can be recovered, crushed, squeezed and granulated for continuous use after being used for a certain time, and has the advantages of energy saving and environmental friendliness, and a stone material is mixed with large amounts of PVC, so that the ice-cold feel of the decoration material can be reduced, and the insulation effect is enhanced; and the decoration material cannot be broken in case of collision, so that the base material can be squeezed to obtain a variety of decoration materials, such as floor tiles, wall tiles, ceilings and the like.

The invention belongs to the technical field of industrial gas burner and relates to a low emission high-power staged-combustion gas burner. The staged-combustion gas burner is characterized in that a swirling machine, a flame stabilizing plate, a central canister and a middle pipe are coaxially arranged in the throat of the burner main body from outer to inner, wherein the flame stabilizing plate is provided with a gas gun which is axially fixed and has same uniformly distributed radial lines. The gas collocation method comprises the following steps: (1) collocating no gas in a direct air channel, in which is low-speed central cooling air, (2) mixing the high-speed swirling air entered from a swirling air channel with the gas jetted from a small gas hole B on the gas gun along the radialdirection till reaching to the semi-premixed state before emerging from the throat of the gas burner, and (3) face-to-face jetting the gas from a big gas hole on the top of the gas gun, the high-speed swirling air and the high-speed peripheral axial air flow so as to form non-premixing diffusion combustion. Because of the air, the staged gas branch supply, the premixing combustion and the non-premixing diffusion combustion, the combustion is uniform and NOx is prevented from being generated. The discharge amount of NOx of the gas burner is 70% lower than that of the common burner in the priorart.

The invention discloses a preparation method of a photoinitiator phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide, comprising the steps of enabling diethyl benzylphosphonate and an excessive vitride solution to react in argon under the temperature of 60-70 DEG C, so as to generate phenyl phosphine, enabling the phenyl phosphine and 2,4,6-trimethylbenzoyl chloride to react, so as to obtain a methylbenzene solution of diphenyl(2,4,6-trimethylbenzoyl)phosphine, and oxidizing the diphenyl(2,4,6-trimethylbenzoyl)phosphine into 2 phenyl bis(2,4,6-trimethylbenzoyl)-phosphine oxide by hydrogen peroxide without separating. According to the process, dangerous metal sodium or potassium is not used, the process is advanced, the operation is simple and safe, the product yield is high, the quality is good, and large-scale production is easy.