Explosion-proof type mechanical switching-off device for gas emergency switching off

Abstract

The invention discloses an explosion-proof type mechanical switching-off device for gas emergency switching off. The explosion-proof type mechanical switching-off device for gas emergency switching off comprises an electromagnetic lock, a torsion spring clamp, a supporting plate, a hold hoop and a connection piece of the hold hoop. When a ball valve is switched on, a tapered end of the electromagnetic lock is clamped into a lock hole of a torsion spring clamp. The electromagnetic lock receives pulse electrical signals and is instantly switched on, and the tapered end retreats. The torsion spring clamp gets rid of limitation of the tapered end, under the action of a torsion spring, the torsion spring clamp drives a handle of the ball valve to rotate and switch off the ball valve. After danger is eliminated, the ball valve is manually switched on. When the handle is rotated to the switching-off position, the tapered end of the electromagnetic lock is just clamped into the lock hole of the torsion spring clamp, the torsion spring is compressed again, the torsion spring clamp and the electromagnetic lock form self-locking. Explosion-proof treatment is conducted on the coil portion of the electromagnetic lock by the adoption of an encapsulation technology. The explosion-proof type mechanical switching-off device for gas emergency switching off avoids the problems that by the adoption of an existing mechanical switching-off device, teeth of a gear gets stuck, and a motor burns out, does not influence normal use of the ball valve and brings convenience to a user. The encapsulation type explosion-proof treatment is conducted on the product, so that the potential safety hazards of the product are eliminated.

Description

technical field [0001] The invention relates to an explosion-proof gas emergency cut-off mechanical cut-off device, which is mainly used to close a ball valve when an emergency occurs during the use of gas, so as to avoid losses and potential safety hazards caused by gas leakage. Background technique [0002] Gas leakage is a major safety hazard in the use of household and industrial gas, and a gas emergency cut-off device must be equipped when using it. Generally, the alarm is used in conjunction with the gas solenoid valve. When the alarm detects gas leakage, it will give a pulse signal, and the solenoid valve will close the valve after receiving the pulse signal. However, the gas emergency cut-off device needs to be planned during the construction of the house, and the later installation is more complicated, and there are strict qualification requirements for the construction personnel, so the head of the household cannot install it by himself. Therefore, users often us...

AI Technical Summary

Problems solved by technology

In the production process, there are many parts, including gears, motors, micro switches and other parts, which will inevitably lead to very complicated processing and installation

During use, problems such as gear jamming and motor burning are likely to occur, and it is easy to bring safety hazards

At the same time, when the user manually opens the valve, it is necessary to remove the U-shaped card or pull down the pull ring, which is inconvenient to operate

When gas leaks, the motor itself may become a source of explosion, posing a great safety hazard

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