CN2225585Y - Closing device for gas valve - Google Patents

Abstract

The utility model relates to an inflammable gas leakage automatic alarm and motor rotation automatic closing valve device. When the indoor inflammable gas leakage reaches the control valve, an alarm (1) can send out the sound and light alarm signal which is transmitted to a motor device (2) through an electric wire (3), and a lower-voltage motor can be operated; the shaft of a motor shaft is provided with a rotary button (5) which is covered on the handle of a valve (6); when the rotary button (5) causes that the handle of the valve (6) is rotated by 90 DEG, a limit switch (7) is triggered, the motor is stopped, and the valve (6) is closed. The utility model can effectively prevent that the inflammable gas leakage causes the malignant accidents such as the personnel poisoning, the casualty, the explosion, etc. The inflammable gas is the gas, the liquefied gas, or the natural gas.

Description

The gas valve shutoff device

Existing coal gas, liquid gas, natural gas leaking self-closing device adopt alarm to drive the form of solenoid valve effect basically, and its shortcoming is as follows;

1, when gas leakage, solenoid valve can not disposable cut-out source of the gas, but is in the switch-on and-off state, and this cannot not be fair.

2, the long-term energising of solenoid valve will make coil temperature rise raise, insulation ag(e)ing, and long generation phase fault of time one, and solenoid valve directly is contained on the gas pipe line, and its consequence will make the gas pipe line blast, and this is the thing that absolute prohibition takes place.

3, solenoid valve voltage is for exchanging 220 volts, and one when insulation damages generation singlephase earth fault, and its voltage-to-ground is 220 volts, thereby makes whole tubing charged, and it is extremely dangerous that the people touches gas pipe line, also is electric, and the coal gas standard is definitely unallowed.

4, the gas by solenoid valve will can produce ponding to the pipeline of solenoid valve owing to contain impurity.

In view of there are following four kinds of serious problems in solenoid valve, the utility model is analyzed and researched pointedly, and invented present device, this device comprises that the alarm (1) that is used to detect gas leakage sends sound when gas leakage reaches the expectant control value, visual alarm, by electric wire (3) signal is passed to the rotational automatic throttle down device of motor (2) simultaneously, motor (4) is rotated, on the axle of motor (4), knob (5) is housed, knob (5) covers on the handle of valve (6), when knob (5) makes the handle of valve (6) rotate an angle of 90 degrees, a tappet on the knob (5) just touches limit switch (7) makes motor (4) stall, thereby valve (6) is closed.

Fig. 1 is the structural drawing of gas valve shutoff device of the present utility model;

Fig. 2 is the planimetric map of device shown in Figure 1.

In Fig. 1, label 1 expression alarm, it can send alarm signal by the sound and light alarm device (not shown), and signal is passed to the rotational automatic throttle down device 2 of motor by electric wire 3, motor 4 is rotated, knob 5 is located on the axle of motor, and cover on the handle of valve 6, when knob 5 makes the handle of valve 6 turn over an angle of 90 degrees, tappet on the knob 5 just can touch limit switch 7, after leakage accident took place, (valve handle and pipeline were to an angle of 90 degrees degree, after leakage accident is got rid of for valve closing, valve (6) must be made manual reset, promptly lift rising to knob this moment, the handle of valve (6) turned back with pipeline make motor 4 outages, throttle down 6 artificially.Below put off until some time later bright reseting procedure.Be on the straight line, pipeline ability air feed, meanwhile knob also must reset, promptly the reset button (8) on the rotational automatic throttle down device of motor (2) that lifts rising is pinned, made the motor rotation up to the position of knob, valve (6) handle position unanimity, then, till covering on valve and the handle again, so far reseting procedure finishes, and whole device is in the monitoring state again.If when limit switch (7) is out of control; in this moment sensor (1) back-up protection is arranged, promptly promptly cut off motor power in 15 seconds in energising, and the motor speed that 15 second time changeed per minute 1; just in time make valve handle rotate an angle of 90 degrees, valve (6) is in closed condition.

In order to make whole device make things convenient for the user, easy access and reset operation, sensor (1) is contained on the wall at following 03 meter of indoor floor, and the rotational automatic throttle down device of motor is installed on the pipeline valve, is clamped on the outlet pipe with support (9).

Device of the present utility model can prevent the coal gas leakage of (comprising liquid gas, rock gas) effectively.

Claims (2)

1, a kind of coal gas, liquid gas, natural gas leaking are reported to the police and the valve closing device automatically, and it comprises alarm (1) and the rotational automatic throttle down device of motor (2), it is characterized in that:

Alarm (1) detects the leakage of coal gas, sends the acoustooptic alarm signal when gas leakage reaches the expectant control value, by electric wire (3) signal is passed to the rotational automatic throttle down device of motor (2) simultaneously;

The rotational automatic throttle down device of motor (2) responds above-mentioned signal, and motor (4) is rotated;

On the axle of motor (4), knob (5) is housed, knob (5) covers on the handle of valve (6), when knob (5) makes the handle of valve (6) rotate an angle of 90 degrees, a tappet on the knob (5) just touches limit switch (7), make motor (4) stall, thus throttle down (6).

2, according to the device of claim 1, its feature foot also comprises the reset button (8) that knob (5) is resetted.