KR940000185Y1 - Oil-pressure control device for attachment of excavator - Google Patents

Oil-pressure control device for attachment of excavator Download PDF

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Publication number
KR940000185Y1
KR940000185Y1 KR2019900010407U KR900010407U KR940000185Y1 KR 940000185 Y1 KR940000185 Y1 KR 940000185Y1 KR 2019900010407 U KR2019900010407 U KR 2019900010407U KR 900010407 U KR900010407 U KR 900010407U KR 940000185 Y1 KR940000185 Y1 KR 940000185Y1
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South Korea
Prior art keywords
valve
direction switching
control device
flow control
valves
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KR2019900010407U
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Korean (ko)
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KR920002722U (en
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조형준
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삼성중공업 주식회사
김연수
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Priority to KR2019900010407U priority Critical patent/KR940000185Y1/en
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Publication of KR940000185Y1 publication Critical patent/KR940000185Y1/en

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2278Hydraulic circuits
    • E02F9/2282Systems using center bypass type changeover valves
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2221Control of flow rate; Load sensing arrangements
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267Valves or distributors
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/2278Hydraulic circuits
    • E02F9/2285Pilot-operated systems

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

Abstract

내용 없음.No content.

Description

중장비 작업기의 우선제어장치Priority control device of heavy equipment working machine

제1도는 본 고안 우선제어장치가 구비된 중장비의 병렬 유압회로.1 is a parallel hydraulic circuit of heavy equipment equipped with the present invention priority control device.

제2도는 종래 기술에 따른 병렬유압회로이다.2 is a parallel hydraulic circuit according to the prior art.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 유압펌프 2a, 2b : 방향전환밸브1: Hydraulic pump 2a, 2b: Directional valve

3 : 센터라인 4 : 사이드라인3: centerline 4: sideline

5a, 5b : 연결라인 6, 7 : 파일럿트라인5a, 5b: Connection line 6, 7: Pilot line

8 : 셔틀밸브 9 : 교축밸브8: shuttle valve 9: throttle valve

10 : 2위치유량제어밸브 11 : 스프링10: 2-position flow control valve 11: Spring

12 : 파일럿트라인 13 : 합류라인12: Pilot Line 13: Joining Line

본 고안은 중장비의 각 작업기를 유압펌프와 연결시켜주는 병렬유압회로의 우선 제어장치에 관한 것으로, 특히 이 병렬회로에 병렬연결된 여러개의 작업기중 소정의 작업기를 우선제어해 주도록된 중장비 작업기의 우선제어장치에 관한 것이다.The present invention relates to a priority control device of a parallel hydraulic circuit connecting each work machine of a heavy equipment with a hydraulic pump, and in particular, a priority control of a heavy equipment work machine designed to control a predetermined work machine among several work machines connected in parallel to the parallel circuit. Relates to a device.

일반적으로 중장비에 이용되는 유압장치의 기본회로에는 직렬회로와 병렬회로가 있는바, 이중 직렬회로는 다수개의 작업기가 센터라인을 중심으로하여 유압펌프로부터 각각의 방향전환밸브를 매개하여 연결된 구조로 되어 상기 각 작업기의 방향전환밸브를 동시에 조작하여도 각 작동기가 서로 독립적으로 작동되게 되는 한편, 병렬회로는 제2도에 도시된 바와 유압펌프(51)에 센터라인(52)을 따라 다수의 방향전환밸브(53a, 53b, 53c)가 연결되고, 상기 펌프(51)에 센터라인(52)과 병렬 연결된 사이드라인(54)과 상기 각 방향전환밸브(53a, 53b, 53c)사이가 연결라인(55)으로 연결되며, 이 연결라인(55)에는 MCV(Multi-Controllable Valves)와 연결된 합류라인(56)이 병렬 연결된 구조로 되어, 1대의 유압펌프로 여러대의 작업기를 가동해 줄 수가 있어 일반적으로 많이 사용되고 있다.In general, the basic circuit of the hydraulic device used for heavy equipment includes a series circuit and a parallel circuit. The double series circuit has a structure in which a plurality of working machines are connected to each other via a direction switching valve from a hydraulic pump with a center line as the center. Each actuator is operated independently of each other even when the directional valves of the respective working machines are operated at the same time, while the parallel circuit has a plurality of directions along the center line 52 in the hydraulic pump 51 as shown in FIG. Valves 53a, 53b, and 53c are connected, and between the sidelines 54 connected in parallel with the centerline 52 to the pump 51 and between each of the directional valves 53a, 53b and 53c is a connection line 55. This connection line 55 has a structure in which the confluence line 56 connected to MCV (Multi-Controllable Valves) is connected in parallel, and can operate several working machines with one hydraulic pump. Used There.

그런데 상기 방향전환밸브 중, 중간방향전환밸브(53b)에 굴삭기의 스윙장치를 연결하고, 윗쪽 방향전환밸브(53c)에 버킷을 연결을 연결한 상태에서 상기 양쪽방향전환밸브(53b, 53c)를 동시에 작동시켜주면, 이들 각각의 방향전환밸브(53b, 53c)를 거쳐 공급되는 작동유가 작업기중 부하가 작게 걸리는 쪽인 상기 버킷이 먼저 작동하게 되는 한편, 부하가 크게 걸리는 스윙장치가 나중에 작동하게 된다. 따라서 작업자의 필요에 따라 상기 스윙장치를 우선작동 또는 동작의 확실성을 보장해줄 수가 없다고하는 문제점이 있었다.However, the swing switch of the excavator is connected to the intermediate direction switching valve 53b among the direction switching valves, and both of the direction switching valves 53b and 53c are connected while the bucket is connected to the upper direction switching valve 53c. At the same time, when the hydraulic oil supplied through each of the directional valves 53b and 53c is operated, the bucket, which is the one in which the load is lightly loaded, is operated first, while the swing device which is heavily loaded later is operated. Therefore, there is a problem that the swing device can not guarantee the priority operation or the certainty of the operation according to the needs of the operator.

이에 본 고안은 상기와 같은 목적을 달성하기 위해 안출된 것으로, 제1방향전환밸브와 제2방향전환밸브가 동시에 작동되어도 제1방향전환밸브에 공급되는 압축오일의 양이 제2방향전환밸브에 공급되는 압축오일의 양보다 많이 공급되게 함으로써 상기 제1방향전환밸브에 의해 동작하게 되는 작동기가 제2방향전환밸브에 의해 동작하게 되는 작동기보다 그 동작이 우선적으로 이루어질 수 있도록 된 중장비 병렬회로의 우선제어장치를 제공함에 그 목적이 있다.The present invention is devised to achieve the above object, the amount of compressed oil supplied to the first diverter valve even if the first diverter valve and the second diverter valve are operated simultaneously. The priority of the heavy equipment parallel circuit is such that the actuator operated by the first divert valve can be preferentially operated over the actuator actuated by the second divert valve by supplying more than the amount of compressed oil supplied. The object is to provide a control device.

이러한 목적을 달성하기 위한 본 고안은, 우선 작동이 요구되는 작업기를 제어해 주는 방향전환밸브의 스푸울 양쪽에 각각 연결된 파일럿트라인 사이에 셔틀밸브가 설치되고, 나중 작동이 요구되는 작업기와 연결된 방향전환밸브쪽의 연결라인에는 교축밸브가 구비된 2위치유량제어밸브가 설치되며, 이 유량제어밸브와 상기 셔틀밸브가 내부 파일럿트라인으로 연결된 구조로 되어, 상기 2개의 방향전환밸브의 스푸울을 작동시켜 이들 각 방향전환밸브와 연결된 작업기를 작동시켜주면, 우선작동이 요구되는 작업기쪽 방향전환밸브에 구비된 셔틀밸브를 통과한 압축오일이 나중 작동이 요구되는 작업기와 연결된 방향전환밸브쪽의 2위치유량제어밸브로 공급되어 이 2위치유량제어밸브의 스푸울 위치를 절환시켜 주게 된다. 따라서 펌프로 부터 토출된 압축오일의 일부는 상기 2위치유량제어밸브의 교축밸브의 저항을 받으면서 소량만 이 교축밸브를 통과한 후, 상기 방향절환밸브를 거쳐 해당 작업기를 작동시켜주게 되나, 그 나머지 다량의 압축오일은 셔틀밸브가 구비된 방향절환밸브를 통과하여 이 밸브에 의해 작동되는 작업기를 우선적으로 작동시켜주게 된다.The present invention for achieving this purpose, the shuttle valve is installed between each of the pilot line connected to both sides of the sprue of the directional valve to control the work machine that requires the first operation, the direction connected to the work machine is required later operation A two-position flow control valve with a throttling valve is installed at the connection line on the switching valve side, and the flow control valve and the shuttle valve are connected by an internal pilot line, and the sprues of the two directional control valves are connected. By operating the work machine connected to each of these divert valves, the compressed oil passing through the shuttle valve provided on the work machine direction diverter valve requiring priority operation is the second side of the divert valve connected to the work machine requiring later operation. It is supplied to the position flow control valve to switch the sprue position of the two position flow control valve. Therefore, a part of the compressed oil discharged from the pump receives the resistance of the throttling valve of the two-position flow control valve and only a small amount passes through the throttling valve, and then operates the work machine through the directional valve. A large amount of compressed oil passes through a directional valve equipped with a shuttle valve to preferentially operate a work machine operated by the valve.

이하 본 고안을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 고안에 따른 우선제어장치가 구비된 중장비의 병렬유압회로로서, 유압펌프(1)와 다수개의 방향 전환밸브(2a, 2b, --)가 센터라인(3)를 따라 배열 연결되고, 각각의 방향전환밸브(2a, 2b, --)에는 상기 센터라인(3)과 병렬을 이루고 있는 사이드라인(4)과 각각 연결라인(5a, 5b, --)을 통해 연결되어 있다.1 is a parallel hydraulic circuit of heavy equipment equipped with a priority control apparatus according to the present invention, in which a hydraulic pump 1 and a plurality of directional valves 2a, 2b, and-are arranged and connected along a center line 3. Each of the direction switching valves 2a, 2b, and-is connected to the sideline 4 parallel to the center line 3 through the connection lines 5a, 5b and-, respectively.

그리고 상기 방향전환밸브(2a, 2b, --) 중 제1방향전환밸브(2a)의 스푸울 양쪽에 연결된 파일럿트라인(6, 7)사이에 셔틀밸브(8)가 설치되는 한편, 제2방향전환밸브(2b)에 연결된 상기 연결라인(5b)에는 교축밸브(9)가 구비된 2위치유량제어밸브(10)가 설치되고, 이 2위치유량제어밸브(10)의 스푸울 한쪽에는 스프링(11)이 다른쪽에는 상기 셔틀밸브(8)와 연결된 또다른 파일럿트라인(12)이 각각 연결되어 있으며, 이 연결라인(5b)에는 MVC(도시안됨)와 연결된 합류라인(13)이 P점에서 합류되도록 연결되어 있다.In addition, a shuttle valve 8 is installed between the pilot trains 6 and 7 connected to both sides of the sprue of the first diverter valve 2a among the diverter valves 2a, 2b, and the second valve. The connection line 5b connected to the directional valve 2b is provided with a two-position flow control valve 10 provided with a throttle valve 9, and a spring on one side of the sprue of the two-position flow control valve 10. Another pilot line 12 connected to the shuttle valve 8 is connected to the other side, and the joining line 13 connected to the MVC (not shown) is connected to this connection line 5b. Connected to join at the point.

이상과 같이 구성된 본 고안은, 제1도에 도시된 바와 같이 유압펌프(1)에서 토출된 압유가 센터라인(3)을 통해 중립상태인 다수개의 방향전환밸브(2a, 2b, --)를 관통하여 지나게되고, 사이드라인(4)을 통해 공급되는 오일은 차단되어 이들 각 방향전환밸브(2a, 2b, --)와 연결된 각 작동기에 오일을 공급해 주지 못하게 된다.According to the present invention configured as described above, as shown in FIG. 1, the hydraulic oil discharged from the hydraulic pump 1 is provided with a plurality of direction switching valves 2a, 2b, and-in a neutral state through the center line 3. Passed through and the oil supplied through the sideline 4 is blocked so that the oil cannot be supplied to each actuator connected to each of the directional valves 2a, 2b,-.

이러한 상태에서 조종석에 있는 조절레바(도시안됨)를 이용하여 제1방향전환밸브(2a)와 제2방향전환밸브(2b)의 스푸울에 연결된 파일럿트라인(6, 14) 또는 (7, 15)에 압유를 동시에 공급해 주게 되면, 상기 제1방향전환밸브(2a)의 파일럿트라인(6, 7) 사이에 설치된 셔틀밸브(8)에 파일럿트압력이 가하여져 연결라인(5b)에 설치된 2위치유량제어밸브(10)의 스푸울을 이 유량제어밸브(10)의 스프링(11)을 대항해서 밀어주게 되고, 이에 따라 상기 펌프(1)에 토출된 압유가 사이드라인(4)을 통과해서 연결라인(5b)을 지나가면서 상기 2위치유량제어밸브(10)의 교축밸브(9)에 의해 저항을 받아 소량만 이 교축 밸브(9)을 빠져나가게 되는 한편, 나머지 압유는 제1방향전환밸브(2a)에 연결된 연결라인(5a)을 통과하게 된다.In this state, the pilot line 6, 14 or (7, 15) connected to the sprue of the first diverter valve 2a and the second diverter valve 2b using an adjustment lever in the cockpit (not shown). When pressure oil is supplied simultaneously to the shuttle valve 8, the pilot pressure is applied to the shuttle valve 8 installed between the pilot lines 6 and 7 of the first directional control valve 2a. The sprue of the position flow control valve 10 is pushed against the spring 11 of the flow control valve 10 so that the pressure oil discharged to the pump 1 passes through the side line 4. While passing through the line 5b, resistance is received by the throttling valve 9 of the two-position flow control valve 10, and only a small amount thereof exits the throttling valve 9, while the remaining pressure oil passes through the first directional valve ( Pass through the connection line (5a) connected to 2a).

따라서 이와 같은 병렬회로는 상기 제1방향전환밸브(2a)에 의해 동작하게 되는 작동기가 제2방향전환밸브(2b)에 의해 동작하게 되는 작동기보다 우선작동하게 되는바, 예컨대 굴삭기에 있어서, 상기 제1방향전환밸브(2a)에 상부선회 스윙장치를 제2방향전환밸브(2b)에 버킷을 각각 연결시킨 구조에서 이 방향전환밸브(2a, 2b)를 동시에 절환시켜주게 되면 스윙장치가 버킷보다 우선적으로 동작이 이루어지게 되고, 또 상기 제1방향전환밸브(2a)에 부움을 제2방향전환밸브(2b)에 아암을 각각 연결해 준 구조에서 이 방향전환밸브(2a, 2b)를 동시에 전환시켜주게 되면 부움이 아암보다 우선적으로 작동하게 된다.Therefore, in such a parallel circuit, the actuator operated by the first diverter valve 2a is operated prior to the actuator operated by the second diverter valve 2b. For example, in the excavator, In the structure in which the upper swing swing device is connected to the first divert swing valve 2a and the bucket is connected to the second divert valve 2b, respectively, when the divert switch valves 2a and 2b are simultaneously switched, the swing device is given priority over the bucket. In order to simultaneously switch between the direction switching valves 2a and 2b in a structure in which an arm is connected to the first direction switching valve 2a and an arm is connected to the second direction switching valve 2b, respectively. The boolean will then take priority over the arm.

이상에서 설명한 바와 같이 본 고안 병렬회로의 우선제어장치는 제1방향전환밸브(2a)와 제2방향전환밸브(2b)를 동시에 작동시켜주게 되면 제2방향전환밸브(2b)로 공급되는 오일이 유량제어밸브(10)에 의해 저항을 받게 됨으로써 펌프(1)에서 토출되는 다량의 오일이 제1방향전환밸브(2a)로 공급되게 되어, 이 제1방향전환밸브(2a)에 의해 동작이 이루어지는 작동기의 작동이 우선적으로 확실하게 이루어지게 하는 효과가 있다.As described above, the priority control device of the present invention parallel circuit operates the first direction switching valve 2a and the second direction switching valve 2b at the same time so that the oil supplied to the second direction switching valve 2b By being resisted by the flow control valve 10, a large amount of oil discharged from the pump 1 is supplied to the first diverter valve 2a, whereby operation is performed by the first diverter valve 2a. There is an effect that the operation of the actuator is made sure first of all.

Claims (1)

센터라인을 따라 제1방향전환밸브 및 제2방향전환밸브(2a, 2b)가 설치되면서 이 방향전환밸브(2a, 2b)가 상기 센터라인과 병렬을 이루는 사이드라인과 각각 연결라인(5a, 5b)을 통해 연결된 중장비 작업기의 우선제어장치에 있어서, 상기 제1방향전환밸브(2a)의 스푸울 양쪽에 연결된 파일럿트라인(6, 7)사이에 셔틀밸브(8)가 설치되는 한편, 상기 제2방향전환밸브(2b)에 연결된 연결라인(5b)에 2위치유량제어밸브(10)가 설치되고, 이 2위치유량제어밸브(10)의 스푸울 한쪽이 상기 셔틀밸브(8)와 연결된 파일럿트라인(12)으로 연결된 것을 특징으로 하는 중장비 작업기의 우선제어장치.The first direction switching valves and the second direction switching valves 2a and 2b are installed along the center line, and the direction switching valves 2a and 2b are connected to the side lines parallel to the center line and to the connection lines 5a and 5b, respectively. In the priority control device of the heavy equipment worker connected via), a shuttle valve (8) is provided between the pilot train (6, 7) connected to both sides of the sprue of the first directional valve (2a), A 2-position flow control valve 10 is installed in the connecting line 5b connected to the 2-way selector valve 2b, and one of the sprues of the 2-position flow control valve 10 is connected to the shuttle valve 8. Priority control device for a heavy equipment worker, characterized in that connected by a tween (12).
KR2019900010407U 1990-07-11 1990-07-11 Oil-pressure control device for attachment of excavator KR940000185Y1 (en)

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KR2019900010407U KR940000185Y1 (en) 1990-07-11 1990-07-11 Oil-pressure control device for attachment of excavator

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KR2019900010407U KR940000185Y1 (en) 1990-07-11 1990-07-11 Oil-pressure control device for attachment of excavator

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190085267A (en) * 2018-01-10 2019-07-18 조윤주 Hand sanitizer portable pocket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190085267A (en) * 2018-01-10 2019-07-18 조윤주 Hand sanitizer portable pocket

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