JPH0444300U

JPH0444300U -

Info

Publication number: JPH0444300U
Application number: JP8753190U
Authority: JP
Priority date: 1990-08-21
Filing date: 1990-08-21
Publication date: 1992-04-15

Description

[Brief explanation of the drawing]

図面は本考案を具体化した一実施例を示し、第
１図は圧力制御弁の中立状態を示す側断面図、第
２図は負荷の高速下降状態を示す側断面図、第３
図は負荷の低速下降状態を示す側断面図、第４図
は負荷の高速上昇状態を示す側断面図、第５図は
負荷の低速上昇状態を示す側断面図、第６，７図
はいずれも従来例を示す圧力制御システム図であ
る。１１ａ……入力ポート、１１ｂ……出力ポート
、１１ｃ……排気ポート、１２……バルブロツド
、１３……供給用弁体、１４……排気用弁体、１
５，１６……弁座、２３……第１のピストン、２
４……第２のピストン、２７，２９……電磁切り
換え弁、Ｌ……接続通路、Ｒ_１，Ｒ_４……制御圧
室。 The drawings show an embodiment embodying the present invention, in which Fig. 1 is a side sectional view showing the neutral state of the pressure control valve, Fig. 2 is a side sectional view showing the high-speed lowering state of the load, and Fig. 3
Figure 4 is a side sectional view showing a low-speed load drop, Figure 4 is a side sectional view showing a high-speed load rise, Figure 5 is a side sectional view showing a low-speed load rise, and Figures 6 and 7 are both FIG. 2 is also a pressure control system diagram showing a conventional example. 11a...Input port, 11b...Output port, 11c...Exhaust port, 12...Valve rod, 13...Valve body for supply, 14...Valve body for exhaust, 1
5, 16... Valve seat, 23... First piston, 2
4...Second piston, 27, 29...Solenoid switching valve, L...Connection passage, _R1 , _R4 ...Control pressure chamber.

Claims

[Scope of utility model registration request]

A valve rod 12 is interposed on the connecting passage L connecting the input port 11a, the output port 11b, and the exhaust port 11c on the housing 11, and a pair of pistons 23 and 24 are connected to the valve rod 12, and a supply valve body 13 is connected to the valve rod 12. and exhaust valve bodies 14 are slidably fitted oppositely, and valve seats 15 and 16 are formed for each valve body 13 and 14 on the connecting passage L side, and both valve bodies 13 and 14 and their valve seats 15 and
16 and the supply valve body 1
The valve rod 12 and both valve bodies 13 can be switched between an exhaust state in which the valve rod 3 and its valve seat 15 are connected, and a supply state in which the exhaust valve body 14 and its valve seat 16 are connected.
14, and a first control port 21a connected to the control pressure chamber _R1 defined by the first piston 23; Pilot port 21b connected to the pilot pressure chamber _R2 formed
, and a second control port 22 connected to a control pressure chamber _R4 defined by a second piston 24.
A pressure control valve characterized in that a is provided on a housing 21.