The utility model provides a gas earthquake shut-off valve. The gas earthquake shut-off valve is composed of a valve body, a shut-off device and a trigger device. The valve body is formed by connecting an upper section and a lower section, and the shut-off device and the trigger device...
A gas shut-off valve is provided for closing off a natural gas pipeline in the event of an earthquake or other seismic disturbance. The valve has an inlet and an outlet aperture communicating with a central chamber, and a valve seat provided between the inlet and the outlet apertures. An ...
This invention allows any unqualified person to reset the valve without any tools by following simple instructions. SUMMARY OF THE INVENTION This invention relates to a toolless-resetable valve which will automatically close off the supply of gas or other fluid to a severely damaged building during...
An earthquake actuated automatic gas shutoff valve having a valve bottom portion with a generally horizontal floor having a ball seat and a valve seat surrounding a gas outlet passageway. A ball having an elastomeric outer surface is held in the ball seat and in the event of an earthquake, ...
When more than 5.5 magnitude of earthquake occurs, a shutoff device and the vibration dropping device can quickly close the valve, shut off a fuel gas source in a pipeline, and ensure the safety of the fuel gas pipeline; and when the earthquake occurs, the alarm device can produce alarm ...
PURPOSE:To shut off gas supply surely when an earthquake occurs by a method wherein attraction of a magnet integral with a valve body to a fixed substance is released and the valve body is constituted so as to close a valve instantaneously when the earthquake larger than a specified seismic ...
A restoring elastic force of a leaf spring 15 is applied on the working plate 12, which is restored from the side to turn in the normal direction along with a valve rod 3 to close a hole of a valve case 2. Thus, a cock 4 is automatically closed to completely shut off a gas in ...
Earthquake shut-off valve for gas line 优质文献 相似文献 参考文献 引证文献Earthquake relief valve A shock actuated shut-off valve is described, comprising: a valve, having an open position and a closed position, rotatably mounted within a valve body; a ... HE Diamond 被引量: 17发表: 1989...
Discussion on how earthquake waves occur and affect the pipeline valve system; Information on the device activation; Data processing functions of the device... Olivadoti,Guiseppe - 《Offshore》 被引量: 0发表: 2001年 Linear gas valve cycle control, shut-off-valve and self test The present in...
Anti-earthquake gas shut-off safety valve. Its mechanism is based on a series of movements and the transfer of weights - steel balls - (from chamber A to chamber B), a magnet and a lever that turns the gas valve, closing it. It is activated by seismic movement and is unaffected by ...