| 摘要 |
The combustible gas mixture is to be let into the combustion chamber (2) of a thermic burr-removal device for the treatment of work pieces (3) by means of temperature and pressure shocks by igniting the gas mixture. The device comprises a control circuit serving as a dosing arrangement which can be adjusted to varying mix conditions. This circuit consists of a flow meter (24 or 29) in each gas feeding duct (9 or 10), a measured quantity comparator (31) and a metering valve (22 or 23) and controlled by the latter in one of the feeding ducts (9 or 10). Shut-off valves (25, 35 or 30, 36) are mounted in the feeding ducts (9 or 10) between the flow meters (24 or 29) and the combustion chamber (2), which respond to a signal of a memory or counting stage (34) connected with one of the flow meters (24 or 29) after a predetermined quantity of gas has flowed through. |
