FUEL SUPPLY DEVICE FOR GAS ENGINE

PROBLEM TO BE SOLVED: To provide a fuel supply device for a gas engine equipped with a mechanism forcibly opening a main valve or a pilot valve incorporated in a main stop valve, and thereby capable of easily extracting a fuel from a high-pressure pipe located on its upstream side. SOLUTION: In the main stop valve 12 included in a high-pressure pipe connecting a fuel vessel to a regulator, a fixing hole 12N having a female screw on its inner periphery is formed on the undersurface of its casing 12 and at a position facing a tip part of a main valve 12E, and a plug 36 such as a bolt or a set screw each having a female screw formed on an outer periphery thereof is detachably fixed thereto. When the main stop valve 12 is replaced, the plug 36 fixed to the casing 12 is detached, and a bolt pushing up the main valve 12E or the pilot valve 12G by its tip part is screwed to open a fuel passage 12B by forcibly moving the main valve 12E or the pilot valve 12G in the valve-opening direction against energization force of a spring 12K. Since pressure of a gas fuel remaining in the high-pressure pipe is lowered by opening the fuel passage 12, the main stop valve is not vibrated in detaching it, and its replacement work can be facilitated. COPYRIGHT: (C)2008,JPO&INPIT