Push-type multifunctional overflow-preventing fuel gas safety valve

Abstract

The invention discloses a push-type multifunctional overflow-preventing fuel gas safety valve. The valve comprises a valve casing and a valve joint, wherein the valve casing is made of a non-magnetized material; a magnetic core controller is arranged outside the valve casing; a magnetic core is arranged in a valve cavity; the valve joint is connected to the gas inlet end of the valve casing; the internal cavity of the valve joint is provided with an ultra-flow protective valve for controlling the on-off state of gas flow at the gas inlet end of the valve cavity; the ultra-flow protective valve is provided with a sealing piece for controlling the on-off state of the gas flow; and the sealing piece is provided with a head part which protrudes outward. The push-type multifunctional overflow-preventing fuel gas safety valve is characterized in that: a return magnetic ring is also arranged in the valve cavity and can be controlled by the magnetic pole of the magnetic core controller to move and push the head part of the sealing piece which is in a closed state, so that the ultra-flow protective valve is opened. The push-type multifunctional overflow-preventing fuel gas safety valve has the advantages of capability of causing the return magnetic ring to act by the manual magnetic core controller so as to remove the overflow protection state of the ultra-flow protective valve, fast and accurate return, safe use and high durability.

Description

technical field [0001] The invention relates to a gas valve, in particular to a non-leakage permanent magnet drive valve with functions of overcurrent protection and overpressure protection. Background technique [0002] An existing permanent magnet drive valve for gas pipelines has a built-in overflow protection valve at the valve joint for controlling the on-off of the gas flow of the valve at the gas inflow end. Such as figure 1 As shown, the valve casing of the permanent magnet drive valve is connected to a valve joint at the gas inflow end, and an over-flow protection valve is arranged inside the valve joint. The over-flow protection valve is composed of a valve body, a valve stem, a valve stem bracket and a pressure spring. The shaft center of the valve stem support 34' is provided with a perforation, and the valve stem 31' passes through the hole and can move up and down along the axis. The valve stem 31' is provided with a cap 35' at the tail end, and the cap 35' i...

AI Technical Summary

Problems solved by technology

However, for the valve opening and reset of the over-flow protection valve, there is still no ideal way to ensure that the trigger is accurate when the over-flow protection is released from the closed state, so that the over-flow protection valve can quickly return to the open state.

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