JPH01165377U

JPH01165377U -

Info

Publication number: JPH01165377U
Application number: JP6058888U
Authority: JP
Priority date: 1988-05-10
Filing date: 1988-05-10
Publication date: 1989-11-20
Anticipated expiration: 2003-05-10
Also published as: JPH0743565Y2

Description

[Brief explanation of the drawing]

第１図は本考案によるパイロツトバルブ装置の
一実施例を示す断面図、第２図は従来のソレノイ
ド式パイロツトバルブ装置を示す模式的断面図、
第３図は従来の電歪素子を使用したパイロツトバ
ルブ装置を示す断面図である。１…装置本体、２…流体導入口、３…流体排出
口、４…弁体、５…電歪素子、６…大径ピストン
、７…小径ピストン、８…圧縮室、９…ロツド、
１０…シート面、１１…第１の絞り装置、１２…
弁室、１３…第２の絞り装置、１４…貫通路、１
５…ばね、１６…カバー、１７ａ，１７ｂ…電気
信号線、１８…気抜口、２１…巻線、２２…鉄心
、２３…可動鉄心、２４…電磁部、２５，２７…
伝達部、２６…支点、２８…弁体、２９…ばね、
３０…装置本体、３１…弁座、３２…流体導入口
、３３…流体導出口、４１…電歪素子、４２，４
３…密閉シリンダ、４４，４５…ピストン、４６
…弁体、４７…逆止弁。 FIG. 1 is a sectional view showing an embodiment of a pilot valve device according to the present invention, and FIG. 2 is a schematic sectional view showing a conventional solenoid type pilot valve device.
FIG. 3 is a sectional view showing a pilot valve device using a conventional electrostrictive element. DESCRIPTION OF SYMBOLS 1... Device body, 2... Fluid inlet, 3... Fluid outlet, 4... Valve body, 5... Electrostrictive element, 6... Large diameter piston, 7... Small diameter piston, 8... Compression chamber, 9... Rod,
DESCRIPTION OF SYMBOLS 10... Sheet surface, 11... First squeezing device, 12...
Valve chamber, 13...Second throttle device, 14...Through passage, 1
5... Spring, 16... Cover, 17a, 17b... Electric signal line, 18... Air vent, 21... Winding wire, 22... Iron core, 23... Movable iron core, 24... Electromagnetic part, 25, 27...
Transmission part, 26...Fully point, 28...Valve body, 29...Spring,
30... Device body, 31... Valve seat, 32... Fluid inlet, 33... Fluid outlet, 41... Electrostrictive element, 42, 4
3... Sealed cylinder, 44, 45... Piston, 46
...Valve body, 47...Check valve.

Claims

[Claims for Utility Model Registration] A fluid inlet and a fluid outlet are formed in the main body of the device, and a valve body is provided between the fluid inlet and the fluid outlet, and expands and contracts due to the electrostrictive effect. The large-diameter piston is driven by the electrostrictive drive body, and the movement of the large-diameter piston drives the small-diameter piston via fluid pressure, and the movement of the small-diameter piston drives the valve body to introduce the fluid. In a pilot valve device that controls communication between a port and a fluid outlet, a first throttle device is provided between the fluid inlet and the valve body, and a first throttle device is provided between the first throttle device and the valve body. The valve chamber communicates with the fluid chamber formed between the large-diameter and small-diameter pistons via a second throttle device, and the opening area of the first throttle device communicates with the fluid chamber formed between the large-diameter and small-diameter pistons. A pilot valve device characterized in that the opening area is smaller than the minimum opening area of a fluid discharge channel formed with a discharge port.