4 results about "Propane gas" patented technology

The utility model provides a linkage control heptafluoropropane gas fire extinguishing device, and belongs to the technical field of fire extinguishing. Comprising a storage tank, and a lifting assembly and a rotary spraying assembly are arranged on the outer wall of the storage tank; the lifting assembly comprises a top plate installed at the top of the storage tank, a first motor is fixedly assembled at the bottom of the top plate, and a first driving wheel is fixedly assembled at the top end of an output shaft of the first motor. The first motor drives the first driving wheel to rotate, the first driving wheel rotates to drive the first driven wheel to rotate, the first driven wheel rotates to drive the four sets of gears to rotate, the gears rotate on the outer wall of the screw to drive the screw to move longitudinally, and the screw moves longitudinally to drive the bottom plate to move longitudinally. And finally, the storage tank and the rotary spraying assembly are driven to change the height, so that the height of the device can be adjusted according to different building inner floor heights, and the fire extinguishing effect of the fire extinguishing device is guaranteed.

This invention provides a power generation device based on the cold energy of a cryogenic propane tank, comprising a liquefied propane vaporizer, a propane heater, an intermediate medium vaporizer, a turbine generator set, and a dimethylamine circulating pump. The tube-side inlet of the liquefied propane vaporizer is connected to a cryogenic storage tank containing propane. The tube-side outlet of the liquefied propane vaporizer is connected to the tube-side inlet of the propane heater, and the tube-side outlet of the propane heater is connected to a propane pipeline network. Dimethylamine, after passing through the dimethylamine circulating pump, is connected to the tube-side inlet of the intermediate medium vaporizer. The tube-side outlet of the intermediate medium vaporizer is connected to the inlet of the turbine generator set, and the outlet of the turbine generator set is connected to the shell-side inlet of the liquefied propane vaporizer. The shell-side outlet of the liquefied propane vaporizer is connected to the inlet of the dimethylamine circulating pump. This invention achieves dual-sided cascaded energy recovery from cold to heat. Compared to traditional direct seawater heating schemes, the net power generation is increased.

The present application provides a kind of polymer reducing material for gas pressure welding, when the gas pressure welding of reinforcing steel etc.is carried out, even in the case of using the propane gas that is inferior to the fire power of acetylene gas, it can be heated with standard flame from the initial heating stage in a way that sufficient fire power can be obtained, and the residue generation of pressure welding part is inhibited, while realizing the strength sufficient pressure welding.Polymer reducing material (A1) for gas pressure welding includes: cover body (1), thermoplastic resin material, and is the bottomed cylindrical body that can be externally embedded in the pressure welding side end of the material to be pressure welded, gas barrier ring (2), is integrally arranged in the bottom (12) of cover body (1), thermosetting resin material, and has the required diameter, and reducing sheet (3), thermoplastic resin material, sandwiching gas barrier ring (2) between the bottom (12) of cover body (1), the diameter is the same as or greater than gas barrier ring (2);Reducing ring (5) of polyimide resin material is wound on the outer peripheral portion of the laminated portion of reducing sheet (3).