Name: The legal status of termination of the patent right of metal hard seal butterfly valve; Termination of patent right for unpaid annual fee.
Application (patent)No.: CN93203933.2 Date of application: 1993.02.26.
Publication (announcement)No.: CN2 148229 Publication (announcement) Date: 1993.5438+02.0438+0.
Main classification number: f16k122 Category classification: 27F.
Classification number: f16k1/22; F 16K 1/226
Applicant: Shashi Valve General Factory, Hubei Province.
Inventor (Designer): Tu Renxin; Jaco; Yellow; Wang; a surname
Address: No.3 Hong Men Road, Shashi, Hubei Country Code: Hubei; Forty two.
Priority:
Patent Agency: Shashi Patent Office Agent: Wang Chunling.
abstract:
The invention relates to a metal hard seal butterfly valve, which is characterized in that after a metal sealing ring installed in a valve body is designed into a splayed cross section, the sealing ring can float in the axial direction and the radial direction, and at the same time, the flexible packing outside the spacer sleeve is pressed by screws, and the valve shaft and the butterfly plate are connected through a step pin shaft, thus solving the problem that the matching clearance between the valve shaft and the valve body shaft hole and the matching clearance between the valve shaft and the butterfly plate shaft hole affects the sealing performance. The utility model has the advantages of simple structure, reliable sealing performance, low cost and long service life, and is suitable for sealing high-temperature, high-pressure and weakly corrosive media such as steel, metallurgy and chemical industry.