DE168505C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

This gas igniter belongs to that known type, in which by the arrangement of valves under the burner at low gas pressure only. the secondary line of a pilot flame 5 kept open and the pilot flame is kept burning, while increasing the Pressure also opens the supply line to the burner and its flame through the pilot flame is ignited. In some such igniters, the auxiliary flame then goes out by shutting off your gas supply line so that the burner flame does not go through until the gas pressure has dropped shortly before the burner flame goes out to be re-ignited, or the pilot flame remains burning constantly. In the previous versions of such gas igniters are mostly those located in the valve housing Channels relatively long and have multiple changes in direction, shape and cross-section, as a result of which a reduction in gas pressure occurs and the operation of the igniter becomes unreliable will.

A very perfect and safe, quick effect even with small pressure differences is now achieved according to the invention in that the line for Secondary flame is formed by a channel located in the valve body itself, which, depending on the valve by the action of the gas pressure in one or the other Position is brought, is, opened or locked.

40

The drawing shows three embodiments of the invention. According to the embodiment of FIG. 1, the Bunsen burner a is screwed onto the housing b containing the valve c, the base plate d of which has the nozzle e to be screwed onto the gas supply line. The base plate d contains in its upper surface the mouth of the channel ff ^l f ² leading to the gas nozzle of the Bunsen burner α , and this mouth is covered and kept closed by the base of the valve disk c when the gas pressure is low. The latter has a central attachment pin c ¹ at the bottom with a channel c ^{2 and a lateral opening c 3} that can be more or less closed by a regulating screw. The valve is guided in the housing b with an upper attachment pin c ⁴ , which pin is provided with an axial bore and at the bottom laterally into this opening channels c ⁵ .

The gas entering through e , if its pressure is not able to lift the valve c , makes its way through the opening c ³ into the housing b, the openings c ⁵ and the axial bore of the connector c ⁴ , from where the gas enters the ignition tube g flows to the ignition flame. Now, if the gas pressure sufficiently amplified, he lifts the valve c, and presses the upper surface against the sealing surface b ^l of the case b while the channel ff ^1/2 is opened, the gas passes through this to the Bunsen burner and ignited at the ignition flame is by doing this during

(2nd edition, issued on June 2nd igoj.J

the raising of the valve is also fed with the gases of higher voltage and therefore ^{burns long enough after the end of its supply channels c 5} to cause the burner flame to ignite before it goes out.

The external atmosphere now acts through the pipe g and the channels c ⁵ against the upper surface of the valve c, during the

ίο gas overpressure acts solely against the lower surface and presses the valve firmly against the surface b ^1; this pressure can be increased by a membrane h which is pressed against the annular surface located in the housing b when the valve is lifted. If the gas pressure drops sufficiently, the valve falls onto its lower seat and the gas enters the ignition tube g again to ignite on the mantle, which is still hot.

The valve design according to FIG. 2 is the same as in FIG. 1, only that none here Diaphragm present, but the lower side of the valve with a piston-like ring attachment is provided.

According to Fig. 3, the membrane i is attached with the outer edge in the housing, with the inner edge on the valve plate. The channel c ² does not open laterally, but on the upper sealing surface of the valve, and is also ^{branched off from the bore in the pin c 4,} a channel c ⁶ , which opens directly into the housing b , so the valve can never be closed.

This design is particularly suitable for small gas pressure differences; because with such, without the channel c ° and with the lateral opening of the channel c ^2, the gas of higher pressure after lifting the valve would constantly act through the channel c ² against the upper side of the membrane and the effect of the gas overpressure on the lower valve surface would be considerable Reduce. However, since the external atmosphere has ^{constant access to the space above the membrane through the channel c 6} , the stronger gas pressure becomes completely one-sided.

The new gas igniter is mainly intended for compressed gas, with the pilot flame at When not in use, the burner is fed with gas of ordinary pressure.

Claims (2)

Patent Claims: 1. Gas ignition device, in which the reversal of the gas flow from the Pilot flame to main flame and vice versa caused by changing the gas pressure by means of a double seat valve which, when the gas pressure is high, opens out towards one side of the valve Main flame line, at low pressure only the one opening out towards the other valve side Keeps pilot line open, characterized in that the connection between the gas supply line and the ignition line producing, possibly with regulating screw o. The like. Provided channel is in the valve body itself to a short line, little friction and little pressure loss. 2. Ignition device according to claim 1, characterized in that between both sealing surfaces of the valve on this one piston-like, the one-sided Ring attachment that enlarges the pressure area or the valve for this purpose through a membrane with the housing connected is. 1 sheet of drawings.