RU37251U1 - GAS CONTROL DEVICE - Google Patents

Description

The utility model relates to signaling technology and is intended for continuous automatic control of the content of fuel and combustible gases in the air of domestic and communal facilities, automatic shutdown of the gas supply when the power is turned off, and also when the permissible concentration of combustible gases in the air is exceeded with an alarm signal without further spontaneous inclusion of gas supply.

A device for controlling the gas contamination of household interventions is known (certificate for the floor model N Zb53 publ. 16. 02. 97).

The device comprises a thermocatalytic gas sensor, a sound and light alarm unit, an automatic gas shut-off unit, made in the form of an electromagnetic valve, an electromagnetic valve control unit. The device is powered by a power supply.

One of the disadvantages of the known device is the impossibility of automatically shutting off the gas supply during a power outage, which reduces the safety of operation of heat generators and does not meet the requirements of GOST 21204-97 Industrial gas burners and GOST 16569-86 Gas burner devices for heating, domestic stoves.

A gas pollution control device is known (certificate for sex. Model No. 9988 publ. May 16, 1999), consisting of an electromagnetic valve including a locking device and an electromagnet coil with an armature, and a basic gas pollution detector containing a measuring bridge with a thermocatalytic sensor, a comparator, electronic a key, a voltage doubler, a light and sound alarm unit, and a power supply unit with a common negative conductor. The valve is powered by a power supply through a voltage doubler and is electrically connected with a positive terminal to a voltage doubler, and negative - to a common negative conductor through an electronic key.

A significant drawback of the known device is that the solenoid valve used is normally open and does not close when the power is cut off, which contradicts the safety requirements in accordance with GOST 21204-97 Industrial gas burners and GOST 16569-86 Gas burner devices for heating, domestic stoves.

Known solenoid valves are normally closed type (KPEG TU 4859-030-03216769-99, manufactured by OAO Gazapparat g. Saratov, KEF TU 3742-003-33249750-96, manufactured by NPP NTT Saratov)

However, a simple mechanical replacement in the prototype of a normally open type solenoid valve with a normally closed valve makes the prototype device inoperative with this electrical circuit for connecting elements.

The task to be solved by the claimed technical solution is the implementation of the possibility

the use of a normally closed type valve device, the safety of operation of a gas control device, an increase in the service life of the electromagnetic gas valve, and the expansion of the range.

The problem is solved in a gas control device, consisting of a gas detector, including a gas sensor, a comparator, a key, a voltage multiplier, a power supply with a common negative conductor, and an electromagnetic valve that includes a locking device and an electromagnet coil with an armature, so that the key is connected one output to the voltage multiplier, and the second to the coil of the electromagnetic valve connected to a common negative conductor. In addition, the inventive device uses a solenoid valve of a normally closed type, with the possibility of opening it manually or by applying a voltage pulse to the electromagnet.

The proposed connection scheme of the elements of the device allows you to apply the valve normally closed type in accordance with the requirements of GOST, makes it possible to reduce the operating voltage on the valve, which leads to lower temperatures on the coil and, ultimately, to increase the life of the valve and the device as a whole.

A utility model is illustrated in the drawing, where in FIG. shows a block diagram of the proposed device.

The power supply 1 is connected to a gas sensor 2, a comparator 3, a voltage multiplier 4, a key 5, a unit

control 6 key, coil 7 of the electromagnetic valve connected in series with a common negative conductor of the power supply. Coaxial to the coil 7, a pusher is integrated in the valve 8. A locking disk 10 with a rubber seal 11, which lies tightly on the seat 12 and is urged by the return spring 13, is freely attached to the armature 9 of the electromagnet.

The utility model works as follows.

When de-energized, the locking disk 10 with the rubber seal 11 fits snugly against the seat 12 and is pressed by the spring 13, while the valve is normally closed, key 5 is open. When the power supply 1 is turned on, the key closes, but the valve remains closed, because the coil 7 of the electromagnet is supplied with voltage from the signaling device, not enough to tear the disc 10 off the seat 12. Using the pusher 8 manually or by pulsing the voltage to the coil of the electromagnetic valve with a value sufficient to tear the disc from the saddle, the armature 9 rises to the stop and holds in this position voltage supply, a gas-fired gas detector (valve open). Key 5 is in a closed state.

If an unacceptable gas contamination or a power outage occurs, the holding voltage disappears. Since in this case the alarm signal from the comparator 3 through the control unit b opens the key 5.

The voltage holding the anchor is removed from the coil of the electromagnet, the anchor 9 under the influence of the spring 13 closes the valve, returning it to the normally closed

state. Spontaneous opening of the valve does not occur when the power is turned on again. To open the valve, a repeat of the described cycle is required.

The proposed gas control device was manufactured and passed a laboratory test. During operation, the valve does not heat up, there is no life-threatening high voltage, it is possible to use valves of a wider range. In emergency situations, the valve closes and its unauthorized opening does not occur.

Claims (2)

1. The gas contamination control device, consisting of a gas detector, including a gas sensor, a comparator, a voltage multiplier, a key, a power supply unit with a common negative conductor and an electromagnetic valve, including a locking device and an electromagnet coil with an armature, characterized in that the key is connected with one output to a voltage multiplier, and the second to the coil of the electromagnetic valve connected to a common negative conductor. 2. The device according to claim 1, characterized in that the normally-closed type electromagnetic valve is used, with the possibility of opening it manually or by applying a voltage pulse to the electromagnet.