JPH0191172U

JPH0191172U -

Info

Publication number: JPH0191172U
Application number: JP18677287U
Authority: JP
Priority date: 1987-12-08
Filing date: 1987-12-08
Publication date: 1989-06-15

Description

[Brief explanation of the drawing]

第１図乃至第４図の各図面は本考案にＯリング
の摩耗防止構造を具備するリセツト機構を設けた
過流防止装置の側断面図であつて、第１図は過流
防止弁がガス放出口側の弁座に当接する状態を表
わす断面図、第２図は同過流防止弁がガス導出ホ
ース側の弁座に圧接してガス流路を遮断する状態
を表わす断面図、第３図はリセツトロツドを押圧
して上記遮断状態を解除させた状態を表わす断面
図、第４図は第３図に於けるＡ―Ａ線断面図であ
る。又、第５図は従来構造を表わす図面であつて
、過流防止装置の側断面図である。１…過流防止装置、１Ａ…シリンダー、１Ｂ…
ジヨイント、２…ガイドピン挿入孔、３…ガス流
路、４…ガイドピン、４ａ…螺子部、４ｂ…ナツ
ト、５…過流防止弁、６…弁座、７…Ｏリング、
８…発条、９…弁座、１０，１１…螺子孔、１２
…ガス流路、１２′…弁室、１３…雄螺子部、１
４…リセツト機構、１５…リセツトロツド、１５
′…テーパ部、１６…挿通孔、１６′…小径孔部
、１７…押え蓋、１８…段部、１９…溜り溝、２
０…グリース、２１，２２…Ｏリング、２３…発
条、２４，２５…雄螺子部、２６…ガス導出ホー
ス、２７…圧力計。 1 to 4 are side sectional views of an overflow prevention device equipped with a reset mechanism having an O-ring wear prevention structure according to the present invention, and FIG. Fig. 2 is a cross-sectional view showing the state in which the excessive flow prevention valve is in contact with the valve seat on the gas outlet side, and Fig. 3 is a cross-sectional view showing the state in which the excessive flow prevention valve is in pressure contact with the valve seat on the gas outlet hose side to cut off the gas flow path. The figure is a cross-sectional view showing a state in which the reset rod is pressed to release the above-mentioned shut-off state, and FIG. 4 is a cross-sectional view taken along the line A--A in FIG. 3. Further, FIG. 5 is a diagram showing a conventional structure, and is a side sectional view of the overflow prevention device. 1... Excess flow prevention device, 1A... Cylinder, 1B...
Joint, 2... Guide pin insertion hole, 3... Gas flow path, 4... Guide pin, 4a... Threaded portion, 4b... Nut, 5... Excess flow prevention valve, 6... Valve seat, 7... O ring,
8... Spring, 9... Valve seat, 10, 11... Screw hole, 12
...Gas flow path, 12'...Valve chamber, 13...Male thread part, 1
4... Reset mechanism, 15... Reset rod, 15
'...Tapered part, 16...Insertion hole, 16'...Small diameter hole part, 17...Press cover, 18...Step part, 19...Reservoir groove, 2
0... Grease, 21, 22... O-ring, 23... Spring, 24, 25... Male thread, 26... Gas outlet hose, 27... Pressure gauge.

Claims

[Scope of utility model registration request]

An insertion hole is provided perpendicular to the gas passage on the gas outlet hose side of the excess flow prevention device, which is interposed between the gas outlet of the cylinder and the gas outlet hose connected to the outlet. The reset rod of the flow prevention valve is inserted so that it can move forward and backward, and the tip of the rod is provided with a spring so that it is always biased toward the base, and the base has an insertion hole. In the reset mechanism of the overflow prevention valve, which is formed by fitting a sealing O-ring that presses against the inner peripheral surface, a reservoir groove is provided on the outer periphery of the reset rod, and the reservoir groove is filled with grease. A structure to prevent wear of the O-ring in the reset mechanism of the prevention valve.