Fuel gas shutoff solenoid valve controller

A technology for cutting off solenoid and valve controller, applied in valve details, valve device, valve operation/release device, etc., which can solve the problem that the gas supply solenoid valve cannot be automatically shut off

CN101566248AActive Publication Date: 2009-10-28GUANGZHOU GAS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2009-10-28

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Abstract

The invention relates to a control circuit for controlling the shutoff of fuel gas supply of a solenoid valve in emergency situation. The invention solves the problem that the fuel gas supply solenoid valve cannot be automatically shut off when a direct-current power supply stops power supply after the commercial power fails on the premise of not needing to consume additional electrical energy for a long time. The invention provides the fuel gas shutoff solenoid valve controller, which is connected with a capacitor (C), wherein the capacitor (C) forms a charging circuit with the direct-current power supply (VDC) on one hand, and forms a discharging circuit with the solenoid valve (L) on the other hand; and a coil (J1) of a relay is connected with a power supply terminal, so that the switching between the charging circuit and the discharging circuit can be performed according to the power supply / power failure stage of the direct-current power supply (VDC).
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Description

technical field

[0001] The invention relates to a control circuit for controlling an electromagnetic valve to cut off gas supply in an emergency. Background technique

[0002] In order to ensure the safety of gas use, it is necessary to set up a control device to automatically cut off the gas supply when an accident occurs. The on / off of the gas supply is usually realized by a solenoid valve, which is set to open when the solenoid valve is not energized. When an abnormal situation occurs, it is required to energize the solenoid valve to make it shut off. At present, the alarm powered by the mains is used. When an unexpected situation such as gas leakage or fire is sensed, the solenoid valve is connected to the DC power supply that is also converted from the mains, so that the solenoid valve is energized and turned off. Although this kind of alarm can cut off the gas supply in time when it detects a gas leak, it will fail because there is no power supply when the mains power...

Examples

Embodiment Construction

[0015] The gas cut-off solenoid valve controller is shown in the figure, DC power supply V DC It is converted from mains electricity; the coil J1 of the relay is connected to the DC power supply V DC Two poles; the cathode of the capacitor C is grounded (the figure is the DC power supply V DC Negative pole), the anode is connected to the DC power supply V DC Positive pole; one end of the solenoid valve L used as a gas supply switch is grounded, and the other end is connected to the DC power supply V through the alarm switch J2-1 DC Positive pole, the alarm switch J2-1 is controlled by an external alarm, which is also powered by the mains, and the alarm switch J2-1 is in the disconnected state under normal working conditions; the node between the solenoid valve L and the alarm switch J2-1 passes through a The branch formed by the normally closed contact J1-2 of the relay and the diode connected in series is connected to the anode of the capacitor C.

[0016] The operator ope...