JPH0262173U - - Google Patents
Info
- Publication number
- JPH0262173U JPH0262173U JP14258088U JP14258088U JPH0262173U JP H0262173 U JPH0262173 U JP H0262173U JP 14258088 U JP14258088 U JP 14258088U JP 14258088 U JP14258088 U JP 14258088U JP H0262173 U JPH0262173 U JP H0262173U
- Authority
- JP
- Japan
- Prior art keywords
- poppet
- pilot
- spring
- circuit
- check valve
- 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
- 239000000446 fuel Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は、本考案の実施例におけるパイロツト
チエツク弁の構造を示す断面図である。第２図は
、従来のパイロツトチエツク弁の構造を示す断面
図である。第３図は、パイロツトチエツク弁を用
いた油圧回路図の代表例である。
１２……パイロツトチエツク弁、１３……アク
チユエータ、１４……切換弁、２１……メインポ
ペツト、２２……一次側通路、２３……二次側通
路、２４，２８，３８……スプリング、２５……
開口部、２６……スプリング室、２７……パイロ
ツト回路、２９……シート部、３０……パイロツ
トポペツト弁、３１……ピストン、３２，３５…
…通路、３３……タンク、３４……絞り、３６…
…回路、３７……リリーフポペツト、３９……リ
リーフ弁、４０……チエツク弁。
FIG. 1 is a sectional view showing the structure of a pilot check valve according to an embodiment of the present invention. FIG. 2 is a sectional view showing the structure of a conventional pilot check valve. FIG. 3 is a typical example of a hydraulic circuit diagram using a pilot check valve. 12... Pilot check valve, 13... Actuator, 14... Switching valve, 21... Main poppet, 22... Primary side passage, 23... Secondary side passage, 24, 28, 38... Spring, 25...
Opening, 26... Spring chamber, 27... Pilot circuit, 29... Seat portion, 30... Pilot poppet valve, 31... Piston, 32, 35...
...Aisle, 33...Tank, 34...Aperture, 36...
...Circuit, 37...Relief poppet, 39...Relief valve, 40...Check valve.
Claims (1)
よび前記スプリングを納めたスプリング室の油圧
力に打ち勝つて、前記ポペツトを後退させ開口す
ると共に、パイロツト回路によりその開口を制御
されるパイロツトチエツク弁において、前記スプ
リングを納めたスプリング室に、リリーフ弁を設
け、同リリーフ弁を介してタンクへ通じる回路を
設けたことを特徴とするパイロツトチエツク弁。 In a pilot check valve whose opening is controlled by a pilot circuit, the poppet is opened by overcoming the pressing force of a spring provided at the back of the poppet and the hydraulic pressure of a spring chamber housing the spring, and the opening of the poppet is controlled by a pilot circuit. A pilot check valve characterized in that a relief valve is provided in a spring chamber containing a fuel, and a circuit is provided that communicates with a tank through the relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14258088U JPH0262173U (en) | 1988-10-31 | 1988-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14258088U JPH0262173U (en) | 1988-10-31 | 1988-10-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0262173U true JPH0262173U (en) | 1990-05-09 |
Family
ID=31408663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14258088U Pending JPH0262173U (en) | 1988-10-31 | 1988-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0262173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001088382A1 (en) * | 2000-05-19 | 2001-11-22 | Hitachi Construction Machinery Co., Ltd. | Pipe breakage control valve device |
-
1988
- 1988-10-31 JP JP14258088U patent/JPH0262173U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001088382A1 (en) * | 2000-05-19 | 2001-11-22 | Hitachi Construction Machinery Co., Ltd. | Pipe breakage control valve device |
| KR100484286B1 (en) * | 2000-05-19 | 2005-04-20 | 히다치 겡키 가부시키 가이샤 | Pipe breakage control valve device |