| 摘要 |
The invention refers to the power engineering, in particular to devices for the protection and monitoring over the fuel combustion process into the boilers furnaces. The device includes a main burner, a primer burner, a frontal furnace plate with an air damper and an automatic safety system, containing a flame detector, a draught detector, a fuel valve and a temperature controller valve.Novelty consists in that the pipe-line for fuel supply into the automatic safety system is provided with a shut-off valve with needle, to which the needle is made with a thread and it is installed into the valve body with the possibility of axial displacement. The rear part of the needle is placed outside the valve and it is provided with a drum, onto which it is fixed and reeled up one end of a metal cable, the second end being passed through a tackle block and it is tied to a suspended load. Through the same tackle block it also passes a rope impregnated with a highly inflammable substance, one end of which is tied to the suspended load, and the other to a hook, hanged onto the frontal furnace plate in the burners region.The result consists in the possibility of interlocking the fuel supply to the boiler furnace even when the safety automation gets out of order.
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