KR970016175A - Hydration prevention device of hydraulic cylinder - Google Patents
Hydration prevention device of hydraulic cylinder Download PDFInfo
- Publication number
- KR970016175A KR970016175A KR1019950029674A KR19950029674A KR970016175A KR 970016175 A KR970016175 A KR 970016175A KR 1019950029674 A KR1019950029674 A KR 1019950029674A KR 19950029674 A KR19950029674 A KR 19950029674A KR 970016175 A KR970016175 A KR 970016175A
- Authority
- KR
- South Korea
- Prior art keywords
- valve
- hydraulic cylinder
- control valve
- poppet
- pilot line
- Prior art date
Links
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
본 발명은 중장비등에 사용되는 유압실린더가 자중이나 하중에 의해 저절로 아래로 내려오게 되는 현상을 방지하는 침하방지장치에 관한 것으로, 유압실린더(5)와 유압펌프(1) 사이에 압유의 흐름을 제어밸브(2)가 설치되고, 상기 제어밸브(2)가 피일롯압에 의해 절환작동되어지도록 된 유압실린더 제어장치에서, 상기 유압실린더(5)와 제어밸브(2) 사이에 포펫밸브(9)가 설치되고, 상기 포펫밸브(9)와 방향제어밸브(10)가 파일롯라인(11)을 통해 연결되면서 그 절환상태에 따라 상기 포펫밸브(9)의 후단을 차단시키거나 파일롯라인(11)을 오일탱크(12)와 연통시키게 되며, 상기 제어밸브(2)를 절환작동시키는 하강용 파일롯라인(9)이 상기 방향제어밸브(10)의 스푸울과 병렬연결되어 있는 한편, 상기 유압실린더(5)의 대구경실(5a)과 포펫밸브(9)사이에 감압밸브(13)와 콕크밸브(15) 및 첵크밸브(14)가 병렬연결되고, 상기 감압밸브(13)와 콕크밸브(15) 및 첵크밸브(14)가 오일탱크(12)와 연결된 구조로 이루어져 있는 것이다.The present invention relates to a sink prevention device that prevents the hydraulic cylinder used for heavy equipment, such as to fall down by itself due to its own weight or load, and controls the flow of pressure oil between the hydraulic cylinder (5) and the hydraulic pump (1) In the hydraulic cylinder control device in which the valve 2 is installed and the control valve 2 is switched by the pilot pressure, a poppet valve 9 is provided between the hydraulic cylinder 5 and the control valve 2. Is installed, the poppet valve (9) and the direction control valve 10 is connected through the pilot line 11 while blocking the rear end of the poppet valve (9) or oil the pilot line (11) according to the switching state In communication with the tank 12, the descending pilot line 9 for switching the control valve 2 is connected in parallel with the spool of the directional control valve 10, the hydraulic cylinder (5) Pressure reducing valve (13) between large diameter chamber (5a) and poppet valve (9) Cock valve 15 and check valve 14 is connected in parallel, the pressure reducing valve 13 and the cock valve 15 and check valve 14 is constructed in a structure that is connected to the oil tank (12).
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명에 따른 유압실린더의 침하방지장치를 구성하는 유압회로도.1 is a hydraulic circuit diagram constituting the settlement prevention device of the hydraulic cylinder according to the present invention.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950029674A KR970016175A (en) | 1995-09-12 | 1995-09-12 | Hydration prevention device of hydraulic cylinder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019950029674A KR970016175A (en) | 1995-09-12 | 1995-09-12 | Hydration prevention device of hydraulic cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
KR970016175A true KR970016175A (en) | 1997-04-28 |
Family
ID=66596261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019950029674A KR970016175A (en) | 1995-09-12 | 1995-09-12 | Hydration prevention device of hydraulic cylinder |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR970016175A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100490479B1 (en) * | 2001-12-06 | 2005-05-17 | 한일유압 주식회사 | Holding valve apparatus for excavator and its oil pressure control method |
KR100690170B1 (en) * | 2002-12-26 | 2007-03-08 | 현대중공업 주식회사 | Oil pressure circuit to reduce minimal lift drift in the skid steer loader |
KR100780452B1 (en) * | 2007-08-16 | 2007-11-28 | 한국수자원공사 | Hydraulic control system of non-return butterfly valve |
-
1995
- 1995-09-12 KR KR1019950029674A patent/KR970016175A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100490479B1 (en) * | 2001-12-06 | 2005-05-17 | 한일유압 주식회사 | Holding valve apparatus for excavator and its oil pressure control method |
KR100690170B1 (en) * | 2002-12-26 | 2007-03-08 | 현대중공업 주식회사 | Oil pressure circuit to reduce minimal lift drift in the skid steer loader |
KR100780452B1 (en) * | 2007-08-16 | 2007-11-28 | 한국수자원공사 | Hydraulic control system of non-return butterfly valve |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E601 | Decision to refuse application |