JPS63179513U

JPS63179513U -

Info

Publication number: JPS63179513U
Application number: JP6941087U
Authority: JP
Priority date: 1987-05-09
Filing date: 1987-05-09
Publication date: 1988-11-21
Also published as: JPH0454488Y2

Description

[Brief explanation of the drawing]

第１図は従来例における縦断面であり、第２図
は本考案の一実施例を示す、通水状態における縦
断面図であり、第３図は同じく水抜状態における
縦断面図であり、第４図は本考案の他の実施例を
示す、通水状態における縦断面図である。１…弁箱、２…流入口、３…流出口、４…一次
圧力室、５…二次圧力室、６…隔壁、７…通孔、
８…上側密封面、９…下側密封面、１０…底蓋、
１１…ストレーナ、１３…押圧桿、１４…空気取
入孔、１５…ボンネツト、１６…ダイヤフラム、
１８…ピストン、２２…細径部、２５…減圧パツ
キン、２７…弁室、２８…連通孔、３１…負圧作
動弁、３２…吸気用ばね、３４…逆止パツキン、
３５…逆止弁、３６…逆止ばね、３７…調整ねじ
、３８…減圧ばね、３９…袋ナツト、４２…グラ
ンド、４３…スピンドル、４６…ハンドル。 FIG. 1 is a vertical cross-sectional view of a conventional example, FIG. 2 is a vertical cross-sectional view of an embodiment of the present invention in a water flowing state, FIG. 3 is a vertical cross-sectional view of the water draining state, and FIG. FIG. 4 is a longitudinal sectional view showing another embodiment of the present invention in a state where water is flowing. DESCRIPTION OF SYMBOLS 1... Valve box, 2... Inflow port, 3... Outlet port, 4... Primary pressure chamber, 5... Secondary pressure chamber, 6... Partition wall, 7... Through hole,
8... Upper sealing surface, 9... Lower sealing surface, 10... Bottom cover,
11...Strainer, 13...Press rod, 14...Air intake hole, 15...Bonnet, 16...Diaphragm,
18...Piston, 22...Slim diameter portion, 25...Reducing pressure packing, 27...Valve chamber, 28...Communication hole, 31...Negative pressure operating valve, 32...Intake spring, 34...Check packing,
35...Check valve, 36...Check spring, 37...Adjustment screw, 38...Reduction spring, 39...Cap nut, 42...Gland, 43...Spindle, 46...Handle.

Claims

[Scope of utility model registration request]

A primary pressure chamber is formed on the inlet side, a secondary pressure chamber is formed on the outlet side, and the primary pressure chamber is located below the secondary pressure chamber, and there is a through hole in the center separating both pressure chambers. a valve box having a partition wall having upper and lower sealing surfaces at its upper and lower ends; a bonnet connected to the upper end of the valve box via a diaphragm therebetween; A piston that stops water, is connected to the diaphragm through the through hole, and is biased downward by a pressure reducing spring located above the diaphragm; a negative pressure operated valve that cuts off communication of the inflow side pressure water with the atmosphere; and a negative pressure operated valve that is fitted into a narrow diameter portion provided on the secondary pressure chamber side of the piston and tightly contacts the upper sealing surface to prevent backflow. A pressure reducing valve for cold regions, comprising a check valve biased downward by a check spring, and a pressure rod arranged at the lower end of the valve box and capable of upwardly moving the piston and the check valve that is locked to the piston. .