A gas self-closing valve in a centralized control room

Abstract

The invention relates to the field of household gas safety valves, and discloses a gas self-closing valve in a centralized control room, which includes a valve casing, an air inlet pipe and an air guide pipe are respectively arranged on both sides of the valve casing, and an upper sealing cover is fixedly set on the top of the valve casing. The top of the inner cavity of the valve housing is provided with a diaphragm in a balanced state, the middle part of the diaphragm is fixedly fitted with a linkage shaft, and the bottom end of the linkage shaft is fixedly connected with a limit sealing plate located below the diaphragm. The gas safety valve in the centralized control room adopts a structural design in which the inner diameters of both sides of the valve seat in the intake pipe are uniformly reduced from the outside to the inside, and uses a steel wire to connect the valve ball and the linkage block to realize safe self-closing when the gas supply pressure is abnormal. Under the premise of the best effect, the valve seat and the valve ball replace the existing transmission mode, which effectively reduces the loss of force transmission from up and down force to lateral force, so as to ensure that the gas supply can be stable when the gas supply is overpressure or low pressure. , Realize closing in time, so as to ensure that the safety protection effect of the gas safety valve is better.

Description

technical field [0001] The invention relates to the field of household gas safety valves, in particular to a gas self-closing valve for a centralized control room. Background technique [0002] With the development of people's life, green energy such as natural gas has also been popularized. More and more families use natural gas. Since natural gas and other gases are flammable and explosive, safety protection measures are also extremely important while using gas. A gas safety valve needs to be installed at the end of the pipeline so that when the gas supply is abnormal, it will automatically close and play a role of safety protection. [0003] The existing gas safety valve is also called gas self-closing valve. There is an elastic diaphragm inside the gas self-closing valve. Using the pressure of the gas supply and the suction force of the magnet, the elastic diaphragm is in a flat equilibrium state. When overpressure occurs , undervoltage or overcurrent, the elastic diaph...

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Problems solved by technology

[0004] However, the transmission of the force of the existing domestic gas safety self-closing valve is changed from the upper and lower force to the lateral force, which makes the relationship between the horizontal pull shaft and its limit structure, the rotation structure between the horizontal pull shaft and the vertical pull shaft due to Adhesion of impurities such as dust and tar in the gas pipeline leads to the jamming of the transmission structure, which makes it impossible to effectively close the problem automatically when the gas supply pressure is abnormal, and the loss of the force transmission force of each structural part is large, and it is easy to be damaged in the gas pipeline. When the supply is abnormal, it cannot achieve self-closing in a stable and timely manner, which may easily cause safety hazards

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