WO2023195578A1 - Soupape de verrouillage de sécurité comprenant une soupape à commande logique capable de commander l'alimentation en pression pilote - Google Patents

Soupape de verrouillage de sécurité comprenant une soupape à commande logique capable de commander l'alimentation en pression pilote Download PDF

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Publication number
WO2023195578A1
WO2023195578A1 PCT/KR2022/008772 KR2022008772W WO2023195578A1 WO 2023195578 A1 WO2023195578 A1 WO 2023195578A1 KR 2022008772 W KR2022008772 W KR 2022008772W WO 2023195578 A1 WO2023195578 A1 WO 2023195578A1
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WO
WIPO (PCT)
Prior art keywords
valve
flow path
pressure
logic valve
pilot
Prior art date
Application number
PCT/KR2022/008772
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English (en)
Korean (ko)
Inventor
임사현
Original Assignee
주식회사 대진에이치에스
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Filing date
Publication date
Application filed by 주식회사 대진에이치에스 filed Critical 주식회사 대진에이치에스
Publication of WO2023195578A1 publication Critical patent/WO2023195578A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • 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
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/024—Pressure relief 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/027—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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • 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
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • 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
    • F15B2211/355—Pilot pressure control

Definitions

  • the present invention relates to a safety lock valve containing a logic valve capable of controlling pilot pressure supply, and is a technology that improves safety and operational responsiveness due to the lowering of the boom of construction equipment.
  • construction equipment handles heavy objects or generates large forces to perform excavation work, and uses hydraulic devices as a source of power. Since the development of the first construction equipment, there has been a continuous demand for smaller, higher-pressure devices to improve work capacity, and as a result, the risk of rupture of pipes or rubber hoses, which are means of transporting hydraulic oil, has significantly increased.
  • a lock valve As an example of a safety device, a lock valve is used. Republic of Korea Patent No. 10-0701031 "Excavator boom emergency lowering device" includes a hydraulic oil line (20) according to the boom down on the cylinder that operates the boom. Technology is applied to prevent the excavator's bucket from descending at high speed by installing a check valve.
  • the safety lock valve is a type of safety device that is directly connected to the connection port of the hydraulic cylinder and performs the function of closing the connection port in the event of sudden loss of hydraulic oil.
  • the hydraulic oil passing through the control valve inevitably experiences a pressure drop. occurs, which results in a decrease in the controllability of the equipment or a decrease in digging force or traction force.
  • the present invention provides a logic valve capable of controlling pilot pressure supply that can improve operational responsiveness to boom down by operating immediately at the pilot set pressure regardless of the pressure applied to the cylinder of construction equipment.
  • the purpose is to provide a safety lock valve that contains
  • the present invention is to form a main flow path so that hydraulic oil flows between a cylinder unit for boom operation and an operation unit for operation, an auxiliary flow path connected in parallel with the main flow path is formed, and a pilot line and a safety lock valve connected to a drain line, comprising: a main spool installed in the main flow passage to control opening and closing of the main flow passage; A relief valve installed in the main flow path and opened when the pressure exceeds a set level; an orifice valve installed in the main flow path to control the main spool by discharge pressure from the surge pressure of the relief valve; A logic valve installed in the auxiliary passage to open the auxiliary passage from the main passage using pilot pressure.
  • a safety lock valve including a logic valve capable of controlling pilot pressure supply is provided.
  • the logic valve includes a first logic valve installed between the main flow path and the auxiliary flow path to open and close, and a second logic valve connected to the first logic valve and operating the opening and closing of the first logic valve by pilot pressure. It is characterized by being composed of.
  • the first logic valve includes an external poppet that is installed between the main flow path and the auxiliary flow path and opens when the set pressure is reached, and an external poppet that is installed inside the external poppet and opens when the set pressure is reached to control the internal pressure of the external poppet. It is characterized in that it consists of an internal poppet that is removed.
  • the second logic valve is installed with a pilot poppet that is connected to the pilot line and opens by pilot pressure to transmit pressure to the first logic valve to open, and a check valve that blocks and discharges the pilot pressure. It is characterized by
  • the second logic valve is characterized in that a spring rod is installed between the pilot poppet and the first logic valve to transmit pilot pressure.
  • Figure 1 is a configuration diagram of a conventional excavator boom emergency lowering device.
  • Figure 2 is an overall configuration diagram of a safety lock valve including a logic valve capable of controlling pilot pressure supply according to an embodiment of the present invention.
  • Figure 3 is a cross-sectional view taken along line B-B' in Figure 2.
  • FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 2.
  • Figure 5 is a hydraulic circuit diagram of Figure 2.
  • Figure 6 is a logic valve operation state diagram of a safety lock valve including a logic valve capable of pilot pressure supply control according to an embodiment of the present invention.
  • FIG. 2 is an overall configuration diagram of a safety lock valve including a logic valve capable of controlling pilot pressure supply according to an embodiment of the present invention
  • FIG. 3 is a cross-sectional view taken along line B-B' of FIG. 2
  • FIG. 4 is a cross-sectional view of FIG. 2. This is a cross-sectional view of A-A'.
  • the safety lock valve containing a logic valve capable of controlling pilot pressure supply according to the present invention is largely divided into a main spool (100), a relief valve (200), an orifice valve (300), and a logic valve (400). ) can be seen to be included.
  • Figure 5 is a hydraulic circuit diagram of Figure 2.
  • C2 is the connection port of the cylinder unit
  • V2 is the connection port of the operation unit
  • E is a port used only when connecting multiple cylinders and is connected to maintain pressure balance with other cylinders.
  • Pil shown in the drawing is a pilot port that supplies pressure for valve switching of the main spool 100 of the lock valve
  • T is a drain port.
  • the safety lock valve containing a logic valve capable of controlling pilot pressure supply has a main flow path (L1) formed so that hydraulic oil flows between a cylinder unit for boom operation and an operation unit for operation, and the main flow path (L1) ) is formed in parallel with the auxiliary passage (L2) and is connected to the pilot line (P1) and the drain line (T1).
  • the main spool 100 is installed in the main passage (L1) to control the opening and closing of the main passage (L1) and the auxiliary passage (L2).
  • the main spool 100 has a built-in check valve, and hydraulic oil is supplied through the control valve by operating the joystick of the operating unit.
  • the boom When the boom is operated, it passes through the main spool (100) from the V2 port and flows into the C2 port to be supplied to the cylinder unit.
  • pilot pressure is supplied and hydraulic oil moves from the C2 port to the V2 port by changing direction by the main spool 100.
  • the relief valve 200 is installed in the main flow path (L1) and connected to the pilot port through the orifice valve 300.
  • the relief valve 200 is connected to the main flow path (L1) and can protect against surge pressure by regulating the maximum pressure.
  • the orifice valve 300 is installed between the main spool 100 and the pilot line (P1), and when a pressure higher than the maximum pressure regulation is generated from the relief valve 200, some of the pressure is relieved and the remaining pressure is released through the orifice valve 300.
  • the main spool 100 is controlled using pressure as pilot pressure.
  • the logic valve 400 is installed in the auxiliary passage (L2) and opens the auxiliary passage (L2) from the main passage (L1) using pilot pressure.
  • the logic valve 400 can ensure stability by preventing rapid descent, especially in the case of a boom down, and in the present invention, the reliability of operation is improved by speeding response especially with the pilot set pressure.
  • the main gist of the present invention is to secure.
  • the logic valve 400 is connected to the first logic valve 420, which is installed between the main flow path (L1) and the auxiliary flow path (L2) and opens and closes, and is connected to the pilot pressure. It consists of a second logic valve 440 that operates to open and close the first logic valve 420.
  • the first logic valve 420 is installed between the main flow path (L1) and the auxiliary flow path (L2) and has an external poppet 422 that opens when the set pressure is reached, and an external poppet 422 inside the external poppet 422. It is composed of an internal poppet 424 that is opened when installed and reaches the set pressure to remove the internal pressure of the external poppet 422.
  • the first logic valve 420 is formed as a double check valve.
  • the second logic valve 440 is connected to the pilot line (P1) and opens by pilot pressure, and transmits pressure to the first logic valve 420 to open the first logic valve 420.
  • a pilot poppet 442 that blocks and discharges the pilot pressure is installed.
  • the pilot set pressure can be designed by the spring pressure of the pilot poppet 442, and in the present invention, it is set to a pressure of about 27 bar to operate. The pressure can be freely set depending on the usage environment.
  • the second logic valve 440 is characterized by a spring rod 460 installed between the pilot poppet 442 and the first logic valve 420 to transmit pilot pressure.
  • the spring rod 460 has a spring installed in the rod, and the rod is moved to the first logic valve by pilot pressure and restored by the elasticity of the spring.
  • Figure 6(a) is a hydraulic oil flow chart of the logic valve in a neutral state.
  • the pressure of hydraulic oil in the main flow path is lower than the set pressure of the first logic valve 420 and is not opened.
  • the external poppet 422 has a connection hole formed on the side to allow external hydraulic oil to move to the internal pressure chamber, and an internal poppet 424 is formed in the internal pressure chamber and is pressured by the inflow hydraulic oil.
  • pilot poppet 442 when pilot pressure is input through user manipulation, the pilot poppet 442 is opened in the second logic valve 440. Then, by pressing the spring rod 460, the internal poppet 424 moves backwards, opening the auxiliary passage, blocking the inflow into the internal pressure chamber, and discharging the fluid to the external auxiliary passage.
  • the external poppet 422 is moved backward by the spring rod 460, opening the auxiliary passage, and hydraulic oil is discharged from the external pressure chamber.
  • the first logic valve 420 can be opened by first opening the internal poppet 424 using the pilot set pressure to remove the pressure in the internal pressure chamber and then opening the external poppet 422 secondarily.
  • the first logic valve 420 when the pilot set pressure is exceeded, the first logic valve 420 can be opened to V2. Therefore, even if the cylinder pressure changes, it can be opened at the pilot set pressure, ensuring reliability of operation.
  • the present invention is based on the technical idea of a safety lock valve containing a logic valve capable of pilot pressure supply control, and within the scope of the basic idea of the present invention, common knowledge in the art Of course, many other transformations are possible for those who have.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

La présente invention concerne une soupape de verrouillage de sécurité dans laquelle : un trajet d'écoulement principal est formé de telle sorte que de l'huile hydraulique s'écoule entre une unité de vérin pour un actionnement de flèche et une unité de manipulation pour une manipulation ; et un trajet d'écoulement auxiliaire relié en parallèle au trajet d'écoulement principal est formé. La soupape de verrouillage de sécurité est reliée à une conduite de pilotage et à une conduite de drainage, et comprend : un tiroir principal installé dans le trajet d'écoulement principal pour réguler l'ouverture et la fermeture du trajet d'écoulement principal ; une soupape de décharge qui est installée dans le trajet d'écoulement principal et s'ouvre lorsqu'une pression de consigne est atteinte ou dépassée ; une soupape à orifice qui est installée dans le trajet d'écoulement principal et commande le tiroir principal au moyen d'une pression de décharge provenant de la pression de surpression de la soupape de décharge ; et une soupape à commande logique qui est installée dans le trajet d'écoulement auxiliaire et ouvre le trajet d'écoulement auxiliaire à partir du trajet d'écoulement principal à l'aide d'une pression pilote.
PCT/KR2022/008772 2022-04-04 2022-06-21 Soupape de verrouillage de sécurité comprenant une soupape à commande logique capable de commander l'alimentation en pression pilote WO2023195578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2022-0041791 2022-04-04
KR1020220041791A KR20230143018A (ko) 2022-04-04 2022-04-04 파일럿 압력 공급 제어가 가능한 로직 밸브를 내포하는 안전 락 밸브

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WO2023195578A1 true WO2023195578A1 (fr) 2023-10-12

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PCT/KR2022/008772 WO2023195578A1 (fr) 2022-04-04 2022-06-21 Soupape de verrouillage de sécurité comprenant une soupape à commande logique capable de commander l'alimentation en pression pilote

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WO (1) WO2023195578A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000220603A (ja) * 1998-11-25 2000-08-08 Kayaba Ind Co Ltd 油圧制御装置
JP2001263305A (ja) * 2000-03-17 2001-09-26 Shin Caterpillar Mitsubishi Ltd 液圧回路
JP2003194008A (ja) * 2001-12-20 2003-07-09 Volvo Construction Equipment Holding Sweden Ab 建設重装備用油圧弁の制御装置
KR100976924B1 (ko) * 2003-11-11 2010-08-18 두산인프라코어 주식회사 유압라인의 공기제거장치를 구비한 굴삭기의 암 록킹장치
KR102263246B1 (ko) * 2020-11-27 2021-06-10 주식회사 대진에이치에스 로직밸브를 내포하는 세이프티 락 기능이 있는 굴삭기 붐/아암 비상 하강장치

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100701031B1 (ko) 2006-05-16 2007-03-29 임사현 굴삭기의 붐 비상 하강장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000220603A (ja) * 1998-11-25 2000-08-08 Kayaba Ind Co Ltd 油圧制御装置
JP2001263305A (ja) * 2000-03-17 2001-09-26 Shin Caterpillar Mitsubishi Ltd 液圧回路
JP2003194008A (ja) * 2001-12-20 2003-07-09 Volvo Construction Equipment Holding Sweden Ab 建設重装備用油圧弁の制御装置
KR100976924B1 (ko) * 2003-11-11 2010-08-18 두산인프라코어 주식회사 유압라인의 공기제거장치를 구비한 굴삭기의 암 록킹장치
KR102263246B1 (ko) * 2020-11-27 2021-06-10 주식회사 대진에이치에스 로직밸브를 내포하는 세이프티 락 기능이 있는 굴삭기 붐/아암 비상 하강장치

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