KR20080048711A - 플로팅 기능이 구비된 더블 체크밸브 - Google Patents
플로팅 기능이 구비된 더블 체크밸브 Download PDFInfo
- Publication number
- KR20080048711A KR20080048711A KR1020060119035A KR20060119035A KR20080048711A KR 20080048711 A KR20080048711 A KR 20080048711A KR 1020060119035 A KR1020060119035 A KR 1020060119035A KR 20060119035 A KR20060119035 A KR 20060119035A KR 20080048711 A KR20080048711 A KR 20080048711A
- Authority
- KR
- South Korea
- Prior art keywords
- check valve
- hydraulic cylinder
- control valve
- flow path
- hydraulic
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check valves
- F15B2211/3051—Cross-check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed centre
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
- F15B2211/3127—Floating position connecting the working ports and the return line
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
- F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/35—Directional control combined with flow control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims (4)
- 유압펌프;상기 유압펌프에 연결되고, 작업장치를 구동시키는 유압실린더;상기 유압펌프와 유압실린더사이의 유로에 설치되고, 절환시 유압실린더의 기동, 정지 및 방향전환을 제어하는 콘트롤밸브; 및상기 콘트롤밸브와 유압실린더사이의 유로에 설치되고, 외부로부터의 신호압 공급시 서로 반대방향으로 절환되도록 분할형성되는 한쌍의 플런저와, 상기 플런저의 절환에 의해 가압되어 체크기능이 각각 해제되는 한쌍의 체크밸브를 구비하는 더블 체크밸브를 포함하며,상기 콘트롤밸브를 중립상태로 절환시키고 상기 작업장치의 플로팅 기능모드를 선택하는 경우, 상기 더블 체크밸브에 의해 유압실린더의 라지챔버와 스몰챔버를 상호 연통시키는 것을 특징으로 하는 플로팅 기능이 구비된 더블 체크밸브.
- 청구항 1에 있어서, 상기 더블 체크밸브는,상기 콘트롤밸브와 유압실린더의 스몰챔버를 상호 연통시키는 제1유로와, 상기 콘트롤밸브와 유압실린더의 라지챔버를 상호 연통시키는 제2유로가 형성되는 하우징;상기 플런저를 절환시키는 신호압력이 유입되는 신호압 통로;상기 제1유로를 개폐시키는 체크밸브를 가압하는 가압편;상기 가압편을 탄성지지하여 상기 체크밸브에 의해 제1유로를 차단하는 것을 초기상태로 탄성바이어스하는 제1탄성부재;상기 제2유로를 개폐시키는 체크밸브를 가압하는 가압편; 및상기 가압편을 탄성지지하여 상기 체크밸브에 의해 제2유로를 차단하는 것을 초기상태로 탄성바이어스하는 제2탄성부재를 포함하는 것을 특징으로 하는 플로팅 기능이 구비된 더블 체크밸브.
- 청구항 1에 있어서, 상기 플런저를 절환시키는 신호압력으로서 유압펌프로 부터 상기 신호압 통로에 공급되는 파일럿 신호압이 사용되는 것을 특징으로 하는 플로팅 기능이 구비된 더블 체크밸브.
- 청구항 1 또는 청구항 2에 있어서, 상기 체크밸브로서 볼타입 또는 포펫이 사용되는 것을 특징으로 하는 플로팅 기능이 구비된 더블 체크밸브.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020060119035A KR100849500B1 (ko) | 2006-11-29 | 2006-11-29 | 플로팅 기능이 구비된 더블 체크밸브 |
US11/825,637 US20080121101A1 (en) | 2006-11-29 | 2007-07-06 | Double check valve having floating function |
EP07014738A EP1927759A1 (en) | 2006-11-29 | 2007-07-27 | Double check valve having floating function |
CNA2007101371672A CN101191506A (zh) | 2006-11-29 | 2007-07-30 | 具有浮动功能的双止回阀 |
JP2007284674A JP2008138870A (ja) | 2006-11-29 | 2007-11-01 | フローティング機能付きダブルチェックバルブ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020060119035A KR100849500B1 (ko) | 2006-11-29 | 2006-11-29 | 플로팅 기능이 구비된 더블 체크밸브 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20080048711A true KR20080048711A (ko) | 2008-06-03 |
KR100849500B1 KR100849500B1 (ko) | 2008-07-31 |
Family
ID=39167691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020060119035A KR100849500B1 (ko) | 2006-11-29 | 2006-11-29 | 플로팅 기능이 구비된 더블 체크밸브 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080121101A1 (ko) |
EP (1) | EP1927759A1 (ko) |
JP (1) | JP2008138870A (ko) |
KR (1) | KR100849500B1 (ko) |
CN (1) | CN101191506A (ko) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100915206B1 (ko) * | 2007-09-20 | 2009-09-02 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 플로팅 기능이 구비된 더블 체크밸브 |
WO2014098284A1 (ko) * | 2012-12-20 | 2014-06-26 | 볼보 컨스트럭션 이큅먼트 에이비 | 플로팅 기능이 구비된 건설기계 |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5283862B2 (ja) * | 2007-06-05 | 2013-09-04 | 三陽機器株式会社 | 油圧制御装置 |
FR2933471B1 (fr) * | 2008-07-03 | 2013-02-15 | Vianney Rabhi | Vanne electro-hydraulique a levee de bille pour centrale hydraulique de moteur a taux de compression variable |
KR100985814B1 (ko) | 2010-02-18 | 2010-10-08 | 파카코리아 주식회사 | 캐비테이션 방지장치가 구비된 더블 파일롯 체크밸브 |
WO2011145759A1 (ko) * | 2010-05-18 | 2011-11-24 | 볼보 컨스트럭션 이큅먼트 에이비 | 건설기계용 더블 체크밸브 |
KR101294673B1 (ko) * | 2010-08-16 | 2013-08-09 | 국방과학연구소 | 자동 밀폐형 급속 유로전환 밸브 |
US20120324880A1 (en) * | 2011-06-23 | 2012-12-27 | Norihiro Kuzuu | Electric-hydraulic hybrid driver |
EP2696080B1 (de) * | 2012-08-09 | 2016-12-14 | HAWE Hydraulik SE | Elektrohydrauliksteuerung |
CA2905312C (en) | 2014-11-04 | 2021-03-30 | Cnh Industrial Canada, Ltd. | Hydraulic system for an air cart |
KR101570390B1 (ko) | 2015-05-12 | 2015-11-19 | 주식회사 에프피씨 | 자동 유량보상 밸브 유닛 |
FR3049663B1 (fr) * | 2016-03-31 | 2018-03-16 | Lohr Industrie | Bloc de securite a double clapet pour verin hydraulique |
EP3492659B1 (en) * | 2017-09-29 | 2022-05-04 | Hitachi Construction Machinery Tierra Co., Ltd. | Construction machine |
KR101835691B1 (ko) * | 2017-11-06 | 2018-04-19 | 주식회사 에프피씨 | 유압작동 보조밸브 |
Family Cites Families (9)
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US3274902A (en) * | 1965-10-22 | 1966-09-27 | Deere & Co | Hydraulic control system |
US3908515A (en) * | 1973-09-10 | 1975-09-30 | Caterpillar Tractor Co | Hydraulic circuit with selectively actuatable float control |
US4166506A (en) | 1975-06-30 | 1979-09-04 | Kabushiki Kaisha Komatsu Seisakusho | Controlling apparatus for bulldozer blade |
WO1981000600A1 (en) * | 1979-08-30 | 1981-03-05 | Caterpillar Tractor Co | Lock valve with variable length piston and hydraulic system for a work implement using the same |
US4506700A (en) | 1983-10-07 | 1985-03-26 | Deere & Company | Poppet valve with float function |
JPH06128984A (ja) * | 1992-10-15 | 1994-05-10 | Kubota Corp | 作業車のドーザ装置 |
JPH10183674A (ja) | 1996-12-25 | 1998-07-14 | Toyo Umpanki Co Ltd | 土工具昇降装置 |
DE19919014C2 (de) | 1999-04-27 | 2001-03-01 | Danfoss Fluid Power As Nordbor | Hydraulikventil mit einer Verriegelungs- und einer Schwimmfunktion |
US6477937B1 (en) * | 1999-12-13 | 2002-11-12 | Aladdin Engineering & Manufacturing | Valve arrangement including release valve |
-
2006
- 2006-11-29 KR KR1020060119035A patent/KR100849500B1/ko active IP Right Grant
-
2007
- 2007-07-06 US US11/825,637 patent/US20080121101A1/en not_active Abandoned
- 2007-07-27 EP EP07014738A patent/EP1927759A1/en not_active Withdrawn
- 2007-07-30 CN CNA2007101371672A patent/CN101191506A/zh active Pending
- 2007-11-01 JP JP2007284674A patent/JP2008138870A/ja active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100915206B1 (ko) * | 2007-09-20 | 2009-09-02 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 플로팅 기능이 구비된 더블 체크밸브 |
WO2014098284A1 (ko) * | 2012-12-20 | 2014-06-26 | 볼보 컨스트럭션 이큅먼트 에이비 | 플로팅 기능이 구비된 건설기계 |
Also Published As
Publication number | Publication date |
---|---|
CN101191506A (zh) | 2008-06-04 |
JP2008138870A (ja) | 2008-06-19 |
US20080121101A1 (en) | 2008-05-29 |
EP1927759A1 (en) | 2008-06-04 |
KR100849500B1 (ko) | 2008-07-31 |
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