EARTHQUAKE SENSING AUTOMATIC CUTOFF GAS VALVE

PURPOSE:To perform a highly sensitive and reliable cutoff by placing a lever at a status to press a valve body in an opened condition and by allowing the lever to generate a moment equal to or greater than a predetermined amount when an earthquake with an intensity equal to or greater than a predete...

Full description

Saved in:
Bibliographic Details
Main Author ONO YASUYUKI
Format Patent
LanguageEnglish
Published 30.04.1983
Subjects
ACTUATING-FLOATS
BLASTING
COCKS
DEVICES FOR VENTING OR AERATING
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
TAPS
THERMAL INSULATION IN GENERAL
VALVES
WEAPONS
Online AccessGet full text

Cover

More Information
Summary:PURPOSE:To perform a highly sensitive and reliable cutoff by placing a lever at a status to press a valve body in an opened condition and by allowing the lever to generate a moment equal to or greater than a predetermined amount when an earthquake with an intensity equal to or greater than a predetermined value occurs. CONSTITUTION:When an earthquake with an intensity equal to or greater than a predetermined value occurs, a valve chest 1 is swayed in one body with a building, and an external force swaying the valve chest 1 is transmitted to a lever 17 and tends to sway a heavy weight 20, which is, however, fitted to the lever with a play and tends to remain stationary by inertia even if the earthquake occurs. Therefore, a force horizontally tumbling the lever 17 is generated and a roller 24 rolls, then when it goes off a cam face 13a and reaches an inclined cam face 13b, a wedge action is created to bumble the lever horizontally. Thereby, a valve body 5 rises and the conical surface section 5a of the valve body 5 gets into contact with a valve seat 8 to keep the valve in a closed condition.
Bibliography:Application Number: JP19810169432