KR19980071521A - Control device of directional valve - Google Patents
Control device of directional valve Download PDFInfo
- Publication number
- KR19980071521A KR19980071521A KR1019980005211A KR19980005211A KR19980071521A KR 19980071521 A KR19980071521 A KR 19980071521A KR 1019980005211 A KR1019980005211 A KR 1019980005211A KR 19980005211 A KR19980005211 A KR 19980005211A KR 19980071521 A KR19980071521 A KR 19980071521A
- Authority
- KR
- South Korea
- Prior art keywords
- meter
- solenoid valve
- valve
- pressure
- control valve
- Prior art date
Links
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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
-
- 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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
-
- 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
-
- 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
- F15B2211/355—Pilot pressure control
-
- 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41572—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and an 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow 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
- F15B2211/40—Flow control
- F15B2211/455—Control of flow in the feed line, i.e. meter-in control
-
- 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
- F15B2211/40—Flow control
- F15B2211/46—Control of flow in the return line, i.e. meter-out control
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
- F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/75—Control of speed of the output member
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
미터아웃 제어 밸브를 유선 작동할 수 있도록 하기 위해, 미터아웃용 전자 밸브(12)의 출력 측을 미터아웃 제어 밸브(7)의 수압부(7a)에 접속하고, 미터인용 전자 밸브(13)의 출력 측을 미터인 제어 밸브(3)의 수압부(3a)에 접속하고, 상기한 미터아웃용 전자 밸브(12)의 원압(原壓)을 파일롯 유압펌프(10)로 하고, 미터인용 전자 밸브(13)의 원압을 미터아웃용 전자 밸브(12)의 출력압으로 하여, 미터아웃용 전자 밸브(12)의 출력압이 소정압력이 된 때에 미터인용 전자 밸브(13)가 압유를 출력하도록 한다.In order to enable the meter-out control valve to operate in a wired manner, the output side of the meter-out solenoid valve 12 is connected to the hydraulic pressure section 7a of the meter-out control valve 7, and the The output side is connected to the hydraulic pressure part 3a of the control valve 3 which is a meter, and the original pressure of the said meter-out solenoid valve 12 is made into the pilot hydraulic pump 10, and the meter-in solenoid valve The source pressure of (13) is used as the output pressure of the meter-out solenoid valve 12 so that the meter-in solenoid valve 13 outputs the pressurized oil when the output pressure of the meter-out solenoid valve 12 reaches a predetermined pressure. .
Description
본 발명은, 건설기계의 액튜에이터 등에 유압을 공급하는 방향제어 밸브를 전환 조작하는 조작장치에 관한 것이다.The present invention relates to an operation apparatus for switching and operating a direction control valve for supplying hydraulic pressure to an actuator of a construction machine.
방향제어 밸브로써는 유압원과 액튜에이터의 제 1실을 연결·차단하는 미터인 제어 밸브와 액튜에이터의 제 2실과 탱크를 연결·차단하는 미터아웃 제어 밸브를 구비한 것이 알려져 있다.As a direction control valve, the control valve which is a meter which connects and interrupts a hydraulic chamber and the 1st chamber of an actuator, and the meter-out control valve which connects and interrupts the 2nd chamber of an actuator and a tank are known.
전술한 방향제어 밸브를 전환 조작하는 조작장치로써는 파일롯유압원의 압유를 미터인용 전자 밸브, 미터아웃용 전자 밸브에 따라 미터인 제어 밸브, 미터아웃 제어 밸브의 수압부에 공급하여, 차단위치에서 연결위치로 하는 것이 알려져 있다.As an operation device for switching the above-mentioned directional control valve, the hydraulic oil of the pilot hydraulic source is supplied to the hydraulic parts of the meter-in control valve and the meter-out control valve according to the meter-in solenoid valve, the meter-out solenoid valve, and connected at the shut-off position. It is known to position.
전술한 조작장치에 따르면, 미터인용 전자 밸브의 출력 측이 미터인 제어 밸브의 수압부에 접속하고, 미터아웃용 전자 밸브의 출력 측이 미터아웃 제어 밸브의 수압부에 접속하고 있기 때문에, 미터인용 전자 밸브와 미터아웃용 전자 밸브에 통전제어하면, 미터인 제어 밸브의 수압부와 미터아웃 제어 밸브의 수압부에 파일롯유압원의 압유가 공급되어 각각 연결위치로 된다.According to the above-mentioned operating device, since the output side of the meter-in solenoid valve is connected to the hydraulic part of the control valve which is a meter, and the output side of the meter-out solenoid valve is connected to the hydraulic part of a meter-out control valve, When energization control is performed to the solenoid valve and the solenoid valve for meter-out, the hydraulic oil of a pilot hydraulic pressure source is supplied to the hydraulic part of the meter-in control valve, and the hydraulic part of a meter-out control valve, and it becomes a connection position, respectively.
한 편, 액튜에이터의 사용조건 등에 따라 미터인 제어 밸브를 먼저 연결위치로 하는 것이 적당한 경우와 미터아웃 제어 밸브가 먼저 연결위치로 되는 것이 적당한 경우가 있다.On the other hand, depending on the conditions of use of the actuator, there are cases where it is appropriate to set the metered control valve first in the connecting position, and in some cases it may be appropriate to set the meter-out control valve first in the connecting position.
그렇지만, 양쪽의 전자밸브에 동시에 통전해도 전자밸브의 작동시간의 분산 등에 따라 한쪽의 전자밸브가 먼저 압유를 출력하고, 그 뒤에 다른 쪽의 전자밸브가 압유를 출력한다.However, even when both solenoid valves are energized at the same time, one solenoid valve first outputs the hydraulic oil according to the dispersion of the operating time of the solenoid valve, and the other solenoid valve outputs the hydraulic oil thereafter.
이 때문에 미터인 제어 밸브와 미터아웃 제어 밸브 한쪽이 먼저 연결위치로 되고, 어느 쪽의 제어 밸브가 먼저 연결위치로 되는가를 특정할 수 없다.For this reason, it is not possible to specify which control valve, which is the meter, and one of the meter-out control valves become the connecting position first, and which of the control valves becomes the connecting position first.
이것을 해소하기에는, 미터인용 전자 밸브와 미터아웃용 전자 밸브의 한쪽에 통전제어한 후 시간지연을 갖고 다른 쪽에 통전제어하는 것이 생각될 수 있지만, 이렇게 하는 것은 콘트롤러 등을 이용할 필요가 있고, 비용이 높아지거나, 잘못 동작하는 것이 있어, 신뢰성이 나쁜 조작장치로 된다.In order to solve this problem, it may be conceivable to control the energization of one of the meter-in solenoid valve and the meter-out solenoid valve with time delay, and then control the energization of the other. Or wrong operation, resulting in an unreliable operation device.
여기서, 본 발명은 전술한 과제를 해결할 수 있도록 한 방향제어 밸브의 조작장치를 제공하는 것을 목적으로 한다.Here, an object of the present invention is to provide an operation device of a directional control valve so as to solve the above problems.
제 1발명은, 유압원과 액튜에이터(4)의 제 1실(5)을 연결·차단하는 미터인 제어 밸브(3)와, 액튜에이터(4)의 제 2실(6)과 탱크(8)를 연결·차단하는 미터아웃 제어 밸브(7)에서 방향 제어 밸브로 하고,The 1st invention is the control valve 3 which is a meter which connects and interrupts the hydraulic chamber and the 1st chamber 5 of the actuator 4, the 2nd chamber 6 of the actuator 4, and the tank 8; The meter-out control valve 7 to be connected and disconnected is used as a directional control valve.
상기한 미터인 제어 밸브(3)의 전환용 압축을 출력하는 미터인용 전자 밸브(13)와, 상기한 미터아웃 제어 밸브(7)의 전환용 압유를 출력하는 미터아웃용 전자 밸브(12)를 구비하여,The meter-in solenoid valve 13 which outputs the compression for switching of the control valve 3 which is the said meter, and the meter-out solenoid valve 12 which outputs the switching pressure oil of the said meter-out control valve 7 Equipped,
상기한 미터인용 전자 밸브(13)와 미터아웃용 전자 밸브(12)의 한쪽의 원압을 다른 쪽의 전자밸브의 출력압으로 한 것을 특징으로 하는 방향 제어 밸브의 조작장치이다.One of the above-mentioned meter-in solenoid valves 13 and meter-out solenoid valves 12 is used as an output pressure of the other solenoid valve.
제 1의 발명에 따르면, 미터인용 전자 밸브(13)와 미터아웃용 전자 밸브(12)의 다른 쪽이 소정의 출력압으로 된 뒤에 한쪽이 압유를 출력하기 때문에, 미터아웃 제어 밸브(7)와 미터인 제어 밸브(3)의 한쪽이 반드시 먼저 연결위치로 되고, 그 뒤에 다른 쪽이 연결위치로 된다.According to the first aspect of the present invention, since the other side of the meter-in solenoid valve 13 and the meter-out solenoid valve 12 becomes a predetermined output pressure, one side outputs pressure oil, so that the meter-out control valve 7 and One side of the control valve 3, which is the meter, is always in the connecting position first, and then the other side is in the connecting position.
따라서, 미터인 제어 밸브(3), 미터아웃 제어 밸브(7)의 한쪽이 반드시 우선하여 작동하기 때문에, 액튜에이터(4)를 사용조건에 적용시킨 상태로 잘못 동작하지 않게 확실히 작동하는 것이 가능하다.Therefore, since one of the metered control valve 3 and the meter-out control valve 7 always operates preferentially, it is possible to reliably operate so that the actuator 4 is not erroneously operated in the state in which the actuator 4 is applied to the use condition.
제 2의 발명은, 제 1의 발명에 있어서 다른 쪽의 전자밸브의 출력 측을 한쪽의 전자밸브의 출력 측에 연결회로(20)로 연결하고, 이 연결회로(20)에 변환밸브(21)를 설치하여, 이 변환밸브(21)를 보통때 폐위치로, 다른 쪽의 출력압이 있는 압력이 되면 열린 위치로 되는 것으로 한 방향 제어 밸브의 조작장치이다.According to a second aspect of the invention, in the first aspect of the invention, the output side of the other solenoid valve is connected to the output side of one solenoid valve by a connecting circuit 20, and the switching valve 21 is connected to the connecting circuit 20. Is provided, and the switching valve 21 is normally closed, and when the pressure with the other output pressure is reached, it is in the open position.
제 2의 발명에 따르면, 다른 쪽의 전자밸브의 출력압이 있는 압력으로 되면 변환밸브(21)가 열린 위치로 되고, 다른 쪽의 전자밸브의 출력압이 한쪽의 전자밸브의 출력 측에 공급되어, 그 출력압으로 된다.According to the second invention, when the pressure with the output pressure of the other solenoid valve is reached, the conversion valve 21 is opened, and the output pressure of the other solenoid valve is supplied to the output side of one solenoid valve. And the output pressure.
이렇게 되어 있기 때문에, 미터인 제어부(3)와 미터아웃 제어 밸브(7)의 다른 쪽을 미세조정범위로 우선하여 작동하고, 그 뒤는 양쪽을 독립시켜 작동할 수 있다.In this way, the other part of the control part 3 which is a meter and the meter-out control valve 7 is given priority to a fine adjustment range, and after that, it can operate independently.
제 3의 발명은, 제 1의 발명에 있어서의 한쪽의 전자밸브의 입력측에 변환밸브(30)를 설치하고, 이 변환밸브(30)를, 보통때는 다른 쪽의 전자밸브의 출력 측을 한쪽의 전자밸브의 입력측에 연결하고, 다른 쪽의 전자밸브의 출력압이 있는 압력으로 되면 파일롯압력원을 한 쪽의 전자밸브의 입력측에 연결하는 것으로 한 방향 제어 밸브의 조작장치이다.In the third invention, the switching valve 30 is provided on the input side of one solenoid valve in the first invention, and this switching valve 30 is normally connected to the output side of the other solenoid valve. It is connected to the input side of the solenoid valve, and when the output pressure of the other solenoid valve is reached, the pilot pressure source is connected to the input side of one solenoid valve.
제 3의 발명에 따르면, 다른 쪽의 전자밸브의 출력압이 있는 압력으로 되면 변환밸브(30)가 전환되고 파일롯압유원의 압유가 한쪽의 입력측에 공급되어, 그 원압이 된다.According to the third invention, when the pressure with the output pressure of the other solenoid valve is reached, the switching valve 30 is switched, and the pressure oil of the pilot pressure oil source is supplied to one input side to become the original pressure.
이렇게 되어 있기 때문에, 미터인 제어 밸브(3)와 미터아웃 제어 밸브(7)의 다른 쪽을 미세조정범위에서 우선하여 작동하고, 그 다음은 양쪽을 독립시켜 작동할 수 있다.In this way, the other side of the control valve 3, which is the meter, and the meter-out control valve 7 can be operated in the fine adjustment range first, and then the two sides can be operated independently.
도 1은, 본 발명의 제1실시의 형태를 나타내는 유압회로도.1 is a hydraulic circuit diagram showing a first embodiment of the present invention.
도 2는, 본 발명의 제2실시의 형태를 나타내는 유압회로도.2 is a hydraulic circuit diagram showing a second embodiment of the present invention.
도 3은, 본 발명의 제3실시의 형태를 나타내는 유압회로도.3 is a hydraulic circuit diagram showing a third embodiment of the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
1 … 유압펌프One … Hydraulic pump
3 … 미터인 제어 밸브3…. Metered Control Valve
4 … 액튜에이터4 … Actuator
5 … 제 1실5... 1st room
6 … 제 2실6. 2nd room
7 … 미터아웃 제어 밸브7. Meter Out Control Valve
8 … 탱크8 … Tank
10 … 파일롯 유압펌프10... Pilot hydraulic pump
12 … 미터아웃용 전자 밸브12... Meter-out solenoid valve
13 … 미터인용 전자 밸브13. Metered-in Solenoid Valve
20 … 연결회로20... Connection circuit
21 … 변환밸브21. Conversion valve
30 … 변환밸브30. Conversion valve
도 1에 나타나있듯이, 유압원으로 있는 유압펌프(1)의 토출로(2)는 미터인 제어 밸브(3)로 액튜에이터(4)의 제 1실(5)에 연결·차단되어, 그 액튜에이터(4)의 제 2실(6)은 미터아웃 제어 밸브(7)로 탱크(8)와 연결·차단된다.As shown in Fig. 1, the discharge passage 2 of the hydraulic pump 1 serving as the hydraulic source is connected to and disconnected from the first chamber 5 of the actuator 4 by a control valve 3 which is a meter, and the actuator ( The second chamber 6 of 4) is connected to and disconnected from the tank 8 by the meter-out control valve 7.
상기한 미터인 제어 밸브(3), 미터아웃 제어 밸브(7)는 스프링(9)으로 차단위치(a)에 지지되어, 수압부(3a)(7a)의 압유로 연결위치(b)로 된다.The metered control valve 3 and the metered out control valve 7 are supported by the spring 9 at the shutoff position a, and are brought into the pressure oil passage connecting positions b of the hydraulic pressure parts 3a and 7a. .
파일롯유압원인 파일롯유압펌프(10)의 토출로(11)는 미터아웃용 전자 밸브(12)의 입구포오트(12a)에 접속하고, 그 출구포오트(12b)는 미터아웃 제어 밸브(7)의 수압부(7a)와 미터인용 전자 밸브(13)의 입구포오트(13a)에 각각 접속하고, 그 출구포오트(13b)는 미터인 제어 밸브(3)의 수압부(3a)에 접속되어 있다.The discharge passage 11 of the pilot hydraulic pump 10, which is the pilot hydraulic source, is connected to the inlet port 12a of the meter-out solenoid valve 12, and the outlet port 12b is the meter-out control valve 7. Is connected to the inlet port 13a of the solenoid valve 7a of the meter and the solenoid valve 13 for meter-in, and the outlet port 13b is connected to the hydraulic part 3a of the control valve 3 which is a meter, have.
상기한 각 전자밸브(12)(13)는 스프링(14)으로 배수위치(c)에 지지되어 출구포오트(12b)(13b)를 탱크포오트(12c)(13c)에 연결하고, 솔레노이드(12a)(13a)에 통전한다. 도 1에 나타나는 전자밸브(12)(13)는 솔레노이드(12a)(13a)에의 통전량에 비례한 압력을 출력하는 비례 감압밸브형의 전자밸브로 되어 있다.Each of the solenoid valves 12 and 13 is supported by the spring 14 at the drainage position c to connect the outlet pots 12b and 13b to the tank pots 12c and 13c, and the solenoid ( 12a) (13a). The solenoid valves 12 and 13 shown in FIG. 1 are solenoid valves of a proportional pressure reducing valve type that output pressure in proportion to the amount of energization to the solenoids 12a and 13a.
다음으로 작동을 설명한다.Next, the operation will be described.
각 솔레노이드(12a)(13a)에 통전하고 각 전자밸브(12)(13)를 연결위치(d)로 한다. 여기에 따라 미터아웃용 전자 밸브(12)의 출구포오트(12b)에 압유가 출력되어, 그 출력압유는 미터아웃 제어 밸브(7)의 수압부(7a)에 유입하고, 연결위치(b)로 향해 점점 이동한다. 이 이동에 수반하여 출구포오트(12b)의 압력이 점점 고압으로 되고, 솔레노이드(12a)의 통전량에 알맞은 소정압력으로 되면, 미터아웃 제어 밸브(7)는 연결위치(b)로 된다.Each solenoid 12a, 13a is energized, and each solenoid valve 12, 13 is set to the connection position d. In this way, the pressure oil is output to the outlet port 12b of the meter-out solenoid valve 12, and the output pressure oil flows into the water pressure part 7a of the meter-out control valve 7, thereby connecting the position b. Will gradually move towards. In response to this movement, when the pressure of the outlet port 12b becomes higher and higher than the predetermined pressure suitable for the energization amount of the solenoid 12a, the meter-out control valve 7 becomes the connecting position b.
다시 말하면, 미터아웃 제어 밸브(7)의 수압부(7a)에 압유가 유입하면 스프링(9)에 대항해 연결위치(b)를 향해 이동하기 때문에, 스프링(9)의 힘이 점점 크게되고, 수압부(7a)의 압력이 이동행정에 대응해 점점 높아진다. 그리고, 이동초기(행정이 작은 때)에는 제 2실(6)과 탱크(8)의 개구면적이 작고, 행정이 크게되면 개구면적이 크게되고, 소정 행정에서 개구면적이 최대로 된다.In other words, when the hydraulic oil flows into the hydraulic pressure portion 7a of the meter-out control valve 7, the hydraulic fluid moves toward the connecting position b against the spring 9, so that the force of the spring 9 becomes larger and larger. The pressure of the portion 7a is gradually increased in response to the movement stroke. At the initial stage of movement (when the stroke is small), the opening area of the second chamber 6 and the tank 8 is small. If the stroke is large, the opening area is large, and the opening area is maximized in the predetermined stroke.
미터아웃용 전자 밸브(12)의 출력압이 솔레노이드(12a)의 통전량에 맞는 소정압력으로 되면, 그 압유는 미터인용 전자밸브(13)의 출구포오트(13b)로부터 미터인 제어 밸브(3)의 수압부(3a)에 유입시작하여 압력이 점점 높아지고, 소정압력으로 되면 연결위치(b)로 된다.When the output pressure of the meter-out solenoid valve 12 becomes a predetermined pressure suitable for the energization amount of the solenoid 12a, the pressure oil is metered from the outlet port 13b of the meter-in solenoid valve 13 to the meter-in control valve 3. The pressure starts to flow into the pressure receiving portion 3a of the c), and the pressure gradually increases. When the pressure reaches the predetermined pressure, the connection position b is reached.
이렇게 되어 있기 때문에, 미터아웃 제어 밸브(7)가 연결위치(b)로 된 후 미터인 제어 밸브(3)가 연결위치(b)로 되기 때문에, 액튜에이터(4)의 제 2실(6)이 탱크(8)에 연결되고 나서 제 1실(5)에 압유가 공급되어, 액튜에이터(4)를 부드럽게 작동할 수 있다.In this way, since the metered control valve 7 becomes the connecting position b, the metered control valve 3 becomes the connecting position b, the second chamber 6 of the actuator 4 The pressure oil is supplied to the 1st chamber 5 after being connected to the tank 8, and can operate the actuator 4 smoothly.
또, 미터인용 전자 밸브(13)의 입구포오트(13a)에 토출로(11)를 접속하고, 그 출구포오트(13b)를 미터아웃용 전자 밸브(12)의 입구포오트(13a)에 접속시키면, 미터인 제어 밸브(3)가 연결위치(b)로 된 후, 미터아웃 제어 밸브(7)가 연결위치(b)로 된다.The discharge passage 11 is connected to the inlet port 13a of the meter-in solenoid valve 13, and the outlet port 13b is connected to the inlet port 13a of the meter-out solenoid valve 12. When it connects, after the control valve 3 which is a meter turns into the connection position b, the meter-out control valve 7 turns into the connection position b.
이렇게 되어 있기 때문에, 액튜에이터(4)의 제 1실(5)에 압유가 공급되고 나서 제 2실(6)이 탱크(8)에 연결되고, 액튜에이터(4)는 큰 추력으로 작동 시작한다.In this way, after the pressure oil is supplied to the first chamber 5 of the actuator 4, the second chamber 6 is connected to the tank 8, and the actuator 4 starts to operate with a large thrust.
도 2는 제 2의 실시형태를 나타내고, 미터아웃용 전자 밸브(12)의 출구포오트(12b)와 미터인용 전자 밸브(13)의 출구포오트(13b)를 연결회로(20)로 연결하고, 이 연결회로(20)에 변환밸브(21)를 설치한다.FIG. 2 shows a second embodiment, connecting the outlet port 12b of the meter-out solenoid valve 12 and the outlet port 13b of the meter-in solenoid valve 13 with a connection circuit 20. In this connection circuit 20, a conversion valve 21 is provided.
이 변환밸브(21)는 스프링(22)으로 폐위치(e)에 지지되어, 수압부(23)에 작용하는 입구측 압력으로 열린 위치(f)로 되고, 그 입구측은 미터아웃용 전자 밸브(12)의 출구포오트(12b)에 연결되어 있다.The switching valve 21 is supported by the spring 22 at the closed position e, and becomes the open position f at the inlet side pressure acting on the hydraulic section 23, and the inlet side is a solenoid valve for metering out ( 12) is connected to the outlet port 12b.
이렇게 되어 있기 때문에, 미터아웃용 전자 밸브(12)의 출력압이 설정압력으로 되면, 변환밸브(21)가 열린 위치(f)로 되어, 미터아웃용 전자 밸브(12)의 출력포오트(12b)는 미터인 제어 밸브(3)의 수압부(3a)에 연결한다.Thus, when the output pressure of the meter-out solenoid valve 12 reaches the set pressure, the switching valve 21 is in the open position f, and the output port 12b of the meter-out solenoid valve 12 is opened. Is connected to the hydraulic pressure section 3a of the control valve 3, which is a meter.
그러므로, 미터아웃 제어 밸브(7)가 차단위치(a)로부터 연결위치(b)를 향해 약간의 행정 이동하면, 그 뒤는 미터아웃 제어 밸브(7)와 미터인 제어 밸브(3)가 동시에 연결위치(b)를 향해 이동한다.Therefore, when the meter-out control valve 7 moves slightly from the shut-off position a toward the connecting position b, the meter-out control valve 7 and the metered control valve 3 are simultaneously connected at the same position. Move towards (b).
다시 말하면, 미터아웃 제어 밸브(7)의 개구면적이 작은 범위(미세조정범위)만 우선하고, 그 뒤는 동시에 작동하는 것이 된다.In other words, only the range (fine adjustment range) of which the opening area of the meter-out control valve 7 is small takes precedence, and then it operates simultaneously.
도 3은 제 3의 실시형태를 나타내고, 미터인용 전자 밸브(13)의 입구측에 변환밸브(30)를 설치한다. 이 변환밸브(30)는 스프링(31)에서 제 1위치(g)에 지지되어 미터아웃용 전자 밸브(12)의 출구포오트(12b)와 미터인용 전자 밸브(13)의 입구포오트(13a)를 연결하고 있다. 수압부(32)에 작용하는 미터아웃용 전자 밸브(12)의 출력압으로 제 2위치(h)로 되어, 파일롯유압펌프(10)의 토출압유를 미터인용 전자 밸브(13)의 입구포오트(13a)에 공급한다.3 shows a third embodiment, and a switching valve 30 is provided on the inlet side of the meter-in solenoid valve 13. The switching valve 30 is supported at the first position g in the spring 31 to allow the outlet port 12b of the meter-out solenoid valve 12 and the inlet port 13a of the meter-in solenoid valve 13. ) Is connecting. The output pressure of the meter-out solenoid valve 12 acting on the hydraulic pressure portion 32 is set to the second position h, and the discharge pressure oil of the pilot hydraulic pump 10 is transferred to the inlet port of the meter-in solenoid valve 13. It supplies to 13a.
이렇게 되어 있기 때문에, 미터아웃용 전자 밸브(12)의 출력압이 설정압력으로 되면 변환밸브(30)가 제 2위치(h)로 되어 미터인용 전자 밸브(13)의 입구포오트(13a)로 파일롯유압펌프(10)의 토출압유가 공급된다.Thus, when the output pressure of the meter-out solenoid valve 12 reaches the set pressure, the changeover valve 30 is in the second position h, and the inlet port 13a of the solenoid valve 13 for the meter-in is provided. The discharge pressure oil of the pilot hydraulic pump 10 is supplied.
그러므로, 미터아웃 제어 밸브(7)가 차단위치(a)로부터 연결위치(b)를 향해 약간의 행정 이동하면, 그 뒤는 미터아웃 제어 밸브(7)와 미터인 제어 밸브(3)가 독립하여 연결위치(b)를 향해 이동한다.Therefore, when the meter-out control valve 7 moves slightly from the shutoff position a toward the connecting position b, the meter-out control valve 7 and the metered control valve 3 are independently connected. Move toward position b.
다시 말하면, 미터아웃 제어 밸브(7)의 개구면적이 작은 범위(미세조정범위)만 우선하고, 그 뒤는 독립하여 작동하는 것이 된다.In other words, only a small range (fine adjustment range) of the opening area of the meter-out control valve 7 takes precedence, followed by independent operation.
이상의 각 실시형태에서는 액튜에이터(4)의 제 1실(5)에만 압유를 공급하도록 하였지만, 제 2실(6)에도 압유를 공급하는 경우에는 같은 모양의 제어 밸브, 전자밸브를 각각 설치하는 것이 좋다.In each of the above embodiments, the pressure oil is supplied only to the first chamber 5 of the actuator 4. However, when the pressure oil is supplied to the second chamber 6, it is preferable to provide control valves and solenoid valves of the same shape, respectively. .
제 1의 발명에 따르면, 미터인 제어 밸브(3), 미터아웃 제어 밸브(7)의 한쪽이 반드시 우선하여 작동하기 때문에, 액튜에이터(4)를 사용조건에 적용시킨 상태로 잘못 동작하지 않게 확실히 작동하는 것이 가능하다.According to the first invention, since one of the control valve 3 and the meter-out control valve 7, which are meters, always operates preferentially, the operation is surely performed so that the actuator 4 is not misoperated with the use condition applied. It is possible to do
제 2의 발명에 따르면, 미터인 제어부(3)와 미터아웃 제어 밸브(7)의 다른 쪽을 미세조정범위로 우선하여 작동하고, 그 뒤는 양쪽을 동시에 작동할 수 있다.According to the second invention, the other side of the control unit 3, which is a meter, and the meter-out control valve 7 can be operated in a fine adjustment range, and then both can be operated simultaneously.
제 3의 발명에 따르면, 미터인 제어 밸브(3)와 미터아웃 제어 밸브(7)의 다른 쪽을 미세조정범위에서 우선하여 작동하고, 그 다음에 양쪽을 독립시켜 작동할 수 있다.According to the third invention, the other of the control valve 3, which is a meter, and the meter-out control valve 7, can be operated first in the fine adjustment range, and then both can be operated independently.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9034684A JPH10231803A (en) | 1997-02-19 | 1997-02-19 | Operating device for direction control valve |
| JP97-34684 | 1997-02-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980071521A true KR19980071521A (en) | 1998-10-26 |
| KR100528227B1 KR100528227B1 (en) | 2006-02-10 |
Family
ID=12421241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980005211A KR100528227B1 (en) | 1997-02-19 | 1998-02-19 | Control device of directional control valve |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH10231803A (en) |
| KR (1) | KR100528227B1 (en) |
| WO (1) | WO1998037330A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101014973B1 (en) * | 2003-12-27 | 2011-02-16 | 두산인프라코어 주식회사 | A Equal Speed Control Unit for Multistage Cylinder |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0025275D0 (en) * | 2000-10-14 | 2000-11-29 | Federal Mogul Friction Product | Pneumatic forcing arrangement |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS505358B1 (en) * | 1969-07-22 | 1975-03-03 | ||
| JPS5154175A (en) * | 1974-11-06 | 1976-05-13 | Toyooki Kogyo Kk | SHOGEKIBOSHIRYUTAISEIGYOSOCHI |
| JP2637437B2 (en) * | 1987-10-21 | 1997-08-06 | カヤバ工業株式会社 | Hydraulic pressure control circuit |
-
1997
- 1997-02-19 JP JP9034684A patent/JPH10231803A/en active Pending
-
1998
- 1998-02-17 WO PCT/JP1998/000661 patent/WO1998037330A1/en active Application Filing
- 1998-02-19 KR KR1019980005211A patent/KR100528227B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101014973B1 (en) * | 2003-12-27 | 2011-02-16 | 두산인프라코어 주식회사 | A Equal Speed Control Unit for Multistage Cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100528227B1 (en) | 2006-02-10 |
| JPH10231803A (en) | 1998-09-02 |
| WO1998037330A1 (en) | 1998-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100576930B1 (en) | Hydraulic system with three electrohydraulic valves for controlling fluid flow to a load | |
| KR950008996A (en) | Hydraulic system of working machine | |
| US7328646B2 (en) | Hydraulic valve arrangement | |
| KR100395893B1 (en) | Pipe breakage control valve device | |
| EP0708252B1 (en) | Control valve with variable priority function | |
| US5261232A (en) | Valve system for supplying fluid from a pair of fluid pressure sources to a load | |
| US5673557A (en) | Displacement control system for variable displacement type hydraulic pump | |
| US7320335B2 (en) | Electrohydraulic control device | |
| US6742438B2 (en) | Hydraulic valve control device for heavy construction equipment | |
| JPH10220409A (en) | Directional control valve device | |
| KR100528227B1 (en) | Control device of directional control valve | |
| JPH10159805A (en) | Hydraulic device for working unit cylinder of construction machine | |
| EP0231876B1 (en) | Hydraulic pressure control system | |
| JP4548959B2 (en) | Hydraulic control device | |
| JP3538466B2 (en) | Main steam stop valve switchgear | |
| US5255705A (en) | Hydraulic pressure control system | |
| JP3667037B2 (en) | Solenoid valve hydraulic control circuit | |
| JP3667036B2 (en) | Hydraulic control circuit | |
| JPS6123681Y2 (en) | ||
| JP2500248Y2 (en) | Hydraulic circuit in hydraulic excavator | |
| KR20000017716U (en) | Variable orifice and hydraulic circuit comprising the same | |
| JPH0736081Y2 (en) | Steam valve mechanism | |
| JPS62270804A (en) | Hydraulic control device | |
| JPH0134723Y2 (en) | ||
| JPH0341135Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20091022 Year of fee payment: 5 |
|
| LAPS | Lapse due to unpaid annual fee |