国家/地区 中国（6）
IPC部 C（6）
IPC大类 C09（6） F16（3） B05（2）
C08（2） F28（2）
IPC小类 C09D（6）
IPC C09D163/00（6）
发明人
公开年 2022（4） 2023（2）
申请年 2022（6）
专利权人

Preparing coating for screw thread, comprises e.g. providing workpieces with screw thread, pretreating screw thread part of workpieces with screw thread; sandblasting workpiece with screw thread after pretreatment; and preheating workpiece with screw thread after sandblasting.

SUN J, WANG Y, WANG L, LI R, SONG X, LIU X

Preparing internal spiral polyvinyl chloride drainage pipe, comprises e.g. bending and spiraling steel wire, extruding, injecting into brushing mechanism, carrying out spiral groove processing, forming inner spiral groove, spraying, extruding, painting and performing preliminary drying.

LIU Z

Graphite tube comprises pipeline body and resin layer loaded on surface of pipeline body, where resin layer comprises phenolic resin, epoxy resin, unsaturated resin, furan resin, graphene and graphite powder.

ZHANG H, MAO Y

Heat exchanger useful in chemical industry, light industry, energy, pharmacy, mechanical and industrial fields, comprises compartment rotatably connected to housing through central rotor and heat exchange element arranged in compartment.

WANG S, ZHANG F, WEI J, QIN Y, SUN G, LI D

Preparing far-infrared nano ceramic powder, comprises mixing coupling agent modified far infrared nano ceramic powder dispersion with graphene slurry, freezing and drying, thermally pressing and sintering, and grinding radiating fin.

YANG X, SHAO J

Preparing pipe material comprises cleaning mineral-inorganic composite materials, grinding, melting, casting and forming in combination with pipe mold by means of centrifugal casting, demolding and cooling, heating and densifying, and coating anti-corrosion coating.

WANG P