DE1900733A1 - Gas valve for fuel elements - Google Patents

Description

Gas valve for fuel elements The invention is a Gas valve, which is arranged in the gas supply lines of fuel elements and consists of a combination of valves and switches known per se.

For the supply of fuel elements with gaseous operating materials various protective measures are required.

To protect the hydrogen electrodes, care must be taken that at the same time with the lack of a sufficient supply of hydrogen, the oxygen supply is prevented.

For starting and stopping a fuel element assembly is an absolutely tight hand valve is required to control the oxygen supply, so that no gas loss occurs. To protect the pressure regulator and other components the gas supply must prevent electrolyte from entering the gas supply line will ; This applies above all to the hydrogen side, since the hydrogen is useful can diffuse quickly through hose walls and thereby create a negative pressure, which sucks the electrolyte from the electrolyte compartment into the hydrogen gas line. However, the liquid barrier that precludes this process must be in the open state work practically without pressure reduction.

These objects are achieved by the gas valve according to the invention, in which a diaphragm valve is connected to a switch. The switch is durcll actuates the valve lift and is closed when the valve is open. The diaphragm valve is arranged in one gas line and closes an adjustable one in the event of undercutting Operating pressure. The switch is in the power supply line of the locking magnet a corresponding valve arranged in the other gas line. The oxygen valve can only be opened from iland; the locking solenoid of the valve is arranged in such a way that that he keeps the manually opened valve open as long as the switch is closed and so the solenoid is live.

In the figure is a possible embodiment of the invention Gas valve for a fuel element operated with hydrogen and oxygen shown. In the hydrogen line 1 of a fuel battery (not shown) is the T hydrogen valve 2, which is connected to a switch 3. The hydrogen valve opens when an adjustable minimum operating pressure is exceeded; the switch 3 is then closed. When the gas pressure drops and the valve 2 closes1 opens switch 3 and does not interrupt the connection between one drawn power supply and the locking magnet. 4, which is the oxygen valve 7 is assigned in the oxygen line 6. This valve 7 can only be opened by hand are and is kept open by the locking magnet 4 as long as over the closed switch 3 via the connection 8 and connection 9 for the line 10 the locking magnet 4 is supplied with power.

In the electrical line 10, further interrupter sections can be used II are arranged, which a shutdown of the fuel battery by Enable blocking of the oxygen line with the aid of valve 7.

When the fuel battery is closed by closing the two valves 2 and 7 is put out of operation, a negative pressure is created by the consumption of operating gas generated in the gas pipes. Through the two valves 2 and 7 of the invention The arrangement will, however, prevent the electrolyte from penetrating into the part behind it the gas supply lines effectively prevented.

Claims (1)

Claim Gas valve for fuel elements fed with gaseous operating materials, thereby characterized in that a diaphragm valve, which is equipped with a valve stroke controlled, when the valve is open, the switch is connected to the closed switch and that when the value falls below the value an adjustable operating pressure closes in a gas line of the element is arranged, wherein the switch with the locking magnet des1rcchc-nd one only manually openable valve in the other gas line is connected, and the Locking magnet keeps the manually opened valve open as long as the switch closed is.