JPH0173505U - - Google Patents
Info
- Publication number
- JPH0173505U JPH0173505U JP1987169565U JP16956587U JPH0173505U JP H0173505 U JPH0173505 U JP H0173505U JP 1987169565 U JP1987169565 U JP 1987169565U JP 16956587 U JP16956587 U JP 16956587U JP H0173505 U JPH0173505 U JP H0173505U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- main
- passage
- pilot chamber
- action
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Safety Valves (AREA)
- Fluid-Pressure Circuits (AREA)
Description
図面第１図はこの考案の実施例を示す回路図、
第２，３図は従来例を示すもので、第２図は回路
図、第３図はその制御特性図である。
１１……シリンダ、１４，１５……メイン通路
、Ｖ……遮断弁としてのカウンターバランス弁、
２１……パイロツト切換弁。
Figure 1 is a circuit diagram showing an embodiment of this invention;
2 and 3 show a conventional example, where FIG. 2 is a circuit diagram and FIG. 3 is a control characteristic diagram thereof. 11... Cylinder, 14, 15... Main passage, V... Counterbalance valve as a shutoff valve,
21...Pilot switching valve.
Claims (1)
設け、その一方のメイン通路に、パイロツト圧の
作用で開状態に切り換わる遮断弁を備え、この遮
断弁のパイロツト室と他方のメイン通路とを接続
する通路過程にパイロツト切換弁を接続するとと
もに、このパイロツト切換弁は、上記一方のメイ
ン通路の背圧の作用で切り換わつて上記パイロツ
ト室を他方のメイン通路に接続する一方、一方の
メイン通路の背圧がなくなると、上記パイロツト
室をタンクに連通させる構成にした配管破損時の
安全装置。 A passage process in which a pair of main passages connected to an actuator is provided, one of the main passages is provided with a shutoff valve that is switched to an open state by the action of pilot pressure, and the pilot chamber of the shutoff valve is connected to the other main passage. A pilot switching valve is connected to the main passage, and the pilot switching valve switches under the action of the back pressure in one of the main passages to connect the pilot chamber to the other main passage. A safety device in the event of piping breakage, which connects the pilot chamber to the tank when the piping is exhausted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987169565U JPH0173505U (en) | 1987-11-05 | 1987-11-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987169565U JPH0173505U (en) | 1987-11-05 | 1987-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0173505U true JPH0173505U (en) | 1989-05-18 |
Family
ID=31459743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987169565U Pending JPH0173505U (en) | 1987-11-05 | 1987-11-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0173505U (en) |
-
1987
- 1987-11-05 JP JP1987169565U patent/JPH0173505U/ja active Pending