KR960003150Y1 - Oil-pressure control apparatus for boom control valve of excavator - Google Patents

Oil-pressure control apparatus for boom control valve of excavator Download PDF

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Publication number
KR960003150Y1
KR960003150Y1 KR2019910016189U KR910016189U KR960003150Y1 KR 960003150 Y1 KR960003150 Y1 KR 960003150Y1 KR 2019910016189 U KR2019910016189 U KR 2019910016189U KR 910016189 U KR910016189 U KR 910016189U KR 960003150 Y1 KR960003150 Y1 KR 960003150Y1
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South Korea
Prior art keywords
boom
valve
circuit
hydraulic
excavator
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KR2019910016189U
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Korean (ko)
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KR930008925U (en
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탁제돈
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삼성중공업 주식회사
김연수
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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
    • E02F9/2264Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267Valves or distributors

Abstract

내용 없음.No content.

Description

굴삭기 붐 합류밸브의 유압제어장치Hydraulic Control System of Excavator Boom Confluence Valve

제1도는 종래의 기술에 따른 굴삭기의 유압회로도.1 is a hydraulic circuit diagram of an excavator according to the prior art.

제2도는 본 고안에 따른 굴삭기의 유압회로도.2 is a hydraulic circuit diagram of an excavator according to the present invention.

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

5 : 붐 작동용 RCV 레버회로 6 : 스윙 작동용 RCV 레버회로5: RCV lever circuit for boom operation 6: RCV lever circuit for swing operation

7 : 비례밸브 8 : 붐 합류밸브7: Proportional valve 8: Boom confluence valve

10 : 붐 작동용 실린 더 11 : 스윙 작동용 모터10: cylinder for boom operation 11: motor for swing operation

본 고안은 굴삭기의 붐 합류밸브를 작업조건에 따라 자동적으로 제어할 수 있는 굴삭기 붐 합류밸브의 유압 제어장치에 관한 것이다.The present invention relates to a hydraulic control device of the excavator boom confluence valve that can automatically control the boom confluence valve of the excavator according to the working conditions.

굴삭기는 필요에 따라 다양한 작동을 하게 된다. 굴삭기는 이중에서 특히 붐 작동과 스윙 작동이 결합된 복합작동(이하, 복합작동)과 붐만의 단독작동(이하 단독작동)을 수행하는 경우가 많다. 이 경우에 있어서 상기 복합작동을 수행하다가 상기 단독 작동으로 전환한 때에는 스윙모터측의 펌프 토출유량을 적절하게 활용하지 않으면 엔진에 부하가 걸리게 되고, 소음이 발생하며, 또한 전체적인 작동효율이 떨어지게 되고, 또 그 반대의 경우에는 스윙작동을 원활하게 수행하기 어렵다.Excavators will perform various operations as needed. Excavators are often dual, in particular combined with boom and swing operations (hereinafter referred to as combined operation) and boom only operation (hereinafter referred to as single operation). In this case, when performing the combined operation but switching to the single operation, if the pump discharge flow rate on the swing motor side is not properly utilized, the engine is loaded, noise is generated, and the overall operating efficiency is reduced. On the contrary, it is difficult to perform the swing operation smoothly.

이러한 문제점을 해결하기 위해서, 종래에는 제1도에 도시된 바와 같은 굴삭기의 유압회로를 채택하여 사용해왔다. 즉, 붐 합류밸브(8)를 회로에 설치하여 유압통로의 개폐에 의해서 유량의 합류여부를 조절 해준다. 한편, 상기 붐 합류밸브(8)에는 비례밸브(7)를 유압관로로서 연결하고, 그 비례밸브(7)에 의해서 파일럿 펌프(3)에서 토출되는 유량을 전환시켜준다. 즉, 상기 비례밸브(7)의 절환작용에 의해서 붐합류밸브(8)를 작동시켜 유량의 합류 통로를 개폐시키고, 이 결과 메인펌프(2)측 유압의 합류여부를 제어하게 된다. 이때 복합작동시에는 수동으로 비례밸브(7)에 조작전류를 공급하여 파일럿 펌프(3)의 파일럿 작동유가 붐 합류밸브(8)를 밀어올리게 한다.In order to solve this problem, the hydraulic circuit of the excavator as shown in FIG. 1 has been conventionally used. That is, by installing the boom confluence valve 8 in the circuit to control the confluence of the flow rate by opening and closing the hydraulic passage. On the other hand, a proportional valve 7 is connected to the boom confluence valve 8 as a hydraulic line, and the flow rate discharged from the pilot pump 3 is changed by the proportional valve 7. In other words, by operating the boom confluence valve 8 by the switching action of the proportional valve (7) to open and close the confluence passage of the flow rate, as a result it is to control whether the hydraulic pressure of the main pump (2) side. At this time, during the combined operation, the operating current is manually supplied to the proportional valve 7 so that the pilot oil of the pilot pump 3 pushes up the boom confluence valve 8.

복합 작동에서 단독작동으로 전환할 때에는 다시 수동조정에 의해서 비례밸브(7)에 조작전류를 공급하여 붐 합류밸브(8)로 향하는 파일럿 관로를(Dr)측 관로로 절환시켜준다. 따라서, 복합작동시 붐 합류밸브(8)에 공급되었던 작동유는 상기 절환에 의해 배출되고, 이 결과로 붐 합류밸브(8)는 아래로 내려와서 메인 펌프(1)에 의해서 토출되는 유량을 붐실린더(10)로 공급하게 한다.When switching from the combined operation to the single operation, the pilot current to the proportional valve 7 is supplied to the proportional valve 7 again by manual adjustment to switch the pilot line toward the boom confluence valve 8 to the dr side. Therefore, the hydraulic fluid supplied to the boom confluence valve 8 in the combined operation is discharged by the switching, and as a result, the boom confluence valve 8 descends to lower the flow rate discharged by the main pump 1 to the boom cylinder. (10).

그러나, 이 방식에 의하면 비례밸브(7)는 수동조작에 의해서 작동되므로, 각각의 작동조건에 대응하여 비레밸브(7)에 대해 적시에 조작전류의 공급을 조절해주어야 하는 불편함이 있었다.However, according to this method, since the proportional valve 7 is operated by manual operation, there is an inconvenience in that it is necessary to adjust the supply of the operation current in a timely manner to the non-reed valve 7 in correspondence with each operating condition.

본 고안은, 상기한 문제점을 해결하기 위해서 안출된 것으로서, 작동시에 스윙용 RCV레버를 조작함에 의해서 자동적으로 비례밸브(7)의 조작을 제어할 수 있게 하기 위한 것이다.The present invention is devised to solve the above-described problems, and is intended to automatically control the operation of the proportional valve 7 by operating the swing RCV lever during operation.

상기한 목적을 달성하기 위해서, 본 고안은 붐 작동용 RCV 레버회로(5)에 있는 (a1)측 판로와(b1)측 관로를 연결 관로로 서로 연결하고, 상기 연결 관로에 이중 체크밸브를 설치하고, 상기 체크밸브내의 관로와 비례밸브(7)의 (Pc)측 관로를 서로 연결하고 구성한 굴삭기 붐 합류밸브의 유압제어장치를 제공한다.In order to achieve the above object, the present invention connects the (a 1 ) side passage and (b 1 ) side passage in the RCV lever circuit (5) for boom operation to each other by a connection pipe, and double check valve to the connection pipe. It provides a hydraulic control device of the excavator boom confluence valve is installed by connecting the pipe in the check valve and the (Pc) side of the proportional valve (7).

제2도는 본 고안에 따른 굴삭기의 유압회로도이다. 메인펌프(1)는 고압유를 유압회로 및 여러 유압밸브를 통과시켜 스위작동 모터(11)로 보내서 스윙작동을 한다. 마찬가지로, 메인펌프(2)는 고압류를 유압회로 및 여러 유압밸브를 통과시켜 붐 작동실린더(10)로 보내서 붐 작동을 하게 한다. 한편, 파일럿펌프(3)는 파일럿 작동압(Pi)를 보내서 각각의 RCV 레버회로(5와 6)을 통과시켜 유압회로에 배치된 유압밸브를 파일럿 조작해준다. 한편, 도면부호(4)는 릴리프 밸브를 지시하는 것으로서 (Pi)측 관로에 과도한 압력이 가해지면 작동유를 릴리프시킨다. 도면부호(5)는 붐 작동용 RCV레버회로를 지시하고, 도면부호(6)은 스윙용 RCV레버회로를 지시하며, 도면부호(5')는 붐 작동용 RCV레버를 지시하고, 또 도면부호(6')는 스윙 작동용 RCV 레버를 지시한다.2 is a hydraulic circuit diagram of an excavator according to the present invention. The main pump 1 performs the swing operation by sending the high pressure oil through the hydraulic circuit and various hydraulic valves to the switch operation motor 11. Similarly, the main pump 2 sends the high pressure flow through the hydraulic circuit and several hydraulic valves to the boom operation cylinder 10 to perform the boom operation. On the other hand, the pilot pump 3 sends a pilot operating pressure Pi to pass through the respective RCV lever circuits 5 and 6 to pilot the hydraulic valves arranged in the hydraulic circuit. On the other hand, reference numeral 4 denotes a relief valve to relieve hydraulic oil when excessive pressure is applied to the (Pi) side conduit. Reference numeral 5 denotes a boom operation RCV lever circuit, reference numeral 6 denotes a swing RCV lever circuit, reference numeral 5 'denotes a boom operation RCV lever circuit, and reference numeral 6 'indicates the swing operation RCV lever.

한편, 비례밸브(7)는 탱크(12)에 연결되는 (Dr)측 관로와 붐 작동용 RCV 레버회로(5)에 연결되는 (Pc)측 관로가 연결되어 있어서 전류공급에 의해 절환된다. 그리고, 비레밸브(7)에는 (Dr)측 관로와(Pc)측 관로가 절환되어 연결되는 관로가 있으며, 이 관로에는 붐 합류밸브(8)가 설치되어 붐 작동용 실린더(10)로의 관로를 개폐한다. 한편, 상기붐 합류밸브(8)에는 파일럿 압력을 일측에 공급해주는 내거티브 컷-오브 밸브(9)가 관로로 연결되어 있다.On the other hand, the proportional valve 7 is switched by the current supply because the (Dr) side pipe connected to the tank 12 and the (Pc) side pipe connected to the RCV lever circuit 5 for boom operation are connected. In addition, there is a pipeline to which the (Dr) side pipeline and the (Pc) side pipeline are switched and connected to the vire valve (7), and the boom confluence valve (8) is installed in the pipeline to the boom operation cylinder (10). Open and close. Meanwhile, a negative cut-of-valve 9 for supplying pilot pressure to one side is connected to the boom confluence valve 8 by a conduit.

그리고, 붐 작동용 RCV 레버회로(5)에는 (Pi, Dr, a1, Pc 및 b1)측 관로들이 연결되어 있고, 스윙 작동용 RCV 레버회로(6)에는 (a2, Pi, b2및 Dr)측 관로들이 연결되어 있다. (Pi)측 관로는 파일럿 펌프(3)로부터의 파일럿 작동유의 공급관로이다. 그리고, (Dr)측 관로는 탱크로의 작동유 귀환관로이다. 또한, (a1, a2, b1및 b2)측 관로는 3위치 밸브의 파일럿 조작관로이고, (a21) 측 관로는 (a1)측 관로에서 분기된 것으로 붐합류밸브(8)의 파일럿 조작관로이다. 여기에서 (a1)측 관로와(b1)측 관로를 연결관로로 서로 연결하고, 상기 연결관로에는 이중체크밸브를 설치한다. 그리고, 상기 체크밸브내의 관로와 비례밸브(7)의 (Pc)측 관로를 서로 연결해준다.(Pi, Dr, a 1 , Pc and b 1 ) side conduits are connected to the RCV lever circuit 5 for boom operation, and (a 2 , Pi, b 2 ) to the RCV lever circuit 6 for swing operation. And Dr) side conduits are connected. The (Pi) side conduit is a supply conduit for pilot hydraulic fluid from the pilot pump 3. The (Dr) side pipe is a hydraulic oil return pipe to the tank. In addition, the (a 1 , a 2 , b 1 and b 2 ) side conduits are pilot operation conduits of three-position valves, and the (a 21 ) side conduits branched from the conduit (a 1 ) conduits (8) Pilot control channel. Here, the (a 1 ) side pipe and the (b 1 ) side pipe are connected to each other by a connecting pipe, and a double check valve is installed in the connecting pipe. Then, the pipe in the check valve and the (Pc) side pipe of the proportional valve 7 are connected to each other.

상기한 구성에 따르면, 초기상태에서 비례밸브(7)의 (Pc)측 관로를 붐 합류밸브(8)에 연결된 관로로 절환시켜 놓은 다음에 작업을 개시한다.According to the above configuration, the operation is started after switching the (Pc) side conduit of the proportional valve 7 to the conduit connected to the boom confluence valve 8 in the initial state.

복합작동시에는 붐 작동용 RCV레버(5')와 스윙 작동용 RCV레버(6')를 모두 조작해주게 되므로(Pc)측 관로에 공급되고, 이 파일럿 작동유는 다시 비례밸브(7)를 거쳐서 붐 합류밸브(8)에 공급된다. 이 결과, 붐 합류밸브(8)는 파일럿 작동유와 부착 스프링의 힘에 의해 상승하여 관로(13)를 폐쇄시켜서 메인 펌프(1)에서 공급되는 작동유를 붐작동 실린더(10)쪽으로 합류시키지 않는다.In combined operation, both the RCV lever 5 'for boom operation and the RCV lever 6' for swing operation are operated (Pc), and the pilot oil is supplied to the pipeline, and the pilot oil is again passed through the proportional valve (7). It is supplied to the confluence valve 8. As a result, the boom confluence valve 8 is raised by the force of the pilot hydraulic oil and the attachment spring to close the conduit 13 so that the hydraulic oil supplied from the main pump 1 is not joined to the boom operating cylinder 10.

단독 작동시에는 스윙용 RCV레버(6')의 조작을 중지시켜 주므로 제1도에의 스윙작동용 도시된 바와 같이 (Pi)측 관로는 차단된다. 한편, (Pc)측 관로는 상기 회로(5)내의 (Dr)측 회로에 연결되어 탱크(12)로 배출된다. 한편, 이 배출로 인하여 붐 합류밸브(8)의 하강에 가해지는 압력이 줄어들어 상기 붐 합류밸브(8)가 닫혀져서 메인펌프(1)에서 공급되는 작동유가 붐 작동용 실린더(10)측으로 합류시키게 된다.In the single operation, since the operation of the swing RCV lever 6 'is stopped, the (Pi) side conduit is blocked as shown in FIG. 1 for the swing operation. On the other hand, the (Pc) side pipe is connected to the (Dr) side circuit in the circuit 5 and discharged to the tank 12. On the other hand, due to this discharge, the pressure applied to the lowering of the boom confluence valve 8 is reduced so that the boom confluence valve 8 is closed so that the hydraulic oil supplied from the main pump 1 is joined to the cylinder 10 for the boom operation. do.

본 고안에 의하면, 붐의 단독작동에 스윙용 RCV레버(6')의 조작을 중지함에 의해서 자동적으로 붐 합류작동 밸브(8)를 개방하여 합류가 이루어지게 함으로써 엔진의 부하를 줄이고, 소음을 감소시키며, 또한 전체적인 작동 효율을 높여줄 수 있다.According to the present invention, the load of the engine is reduced and the noise is reduced by automatically opening the boom confluence valve 8 so that the confluence is made by stopping the operation of the swing RCV lever 6 'during the boom alone operation. It can also increase the overall operating efficiency.

Claims (1)

붐 작동용 RCV레버회로(5), 스윙작동용 RCV레버회로(6), 비례밸브(7), 붐 합류밸브(8), 붐 작동용 실린더(10) 및 스윙작동용 모터(11)를 구비하는 중장비 작동기용 유압회로에 있어서, 상기 붐 작동용 RCV레버회로(5)에 있는 (a1)측 관로와 (b1)측 관로를 연결관로로 서로 연결하되 상기 연결관로에 이중 체크밸브를 설치하고, 상기 체크밸브내의 관로와 상기 비례밸브(7)의 (Pc)측 관로를 서로 연결하여 구성한 것을 특징으로 하는 굴삭기 붐 합류밸브의 유압제어장치.RCV lever circuit (5) for boom operation, RCV lever circuit (6) for swing operation, proportional valve (7), boom confluence valve (8), boom operation cylinder (10) and swing operation motor (11) In the hydraulic circuit for heavy equipment actuator, the (a 1 ) side pipeline and (b 1 ) side pipeline in the RCV lever circuit (5) for boom operation are connected to each other by a connecting pipe line, but a double check valve is installed in the connecting pipe line. And the pipeline in the check valve and the pipeline on the (Pc) side of the proportional valve (7) are configured to be connected to each other.
KR2019910016189U 1991-10-01 1991-10-01 Oil-pressure control apparatus for boom control valve of excavator KR960003150Y1 (en)

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KR2019910016189U KR960003150Y1 (en) 1991-10-01 1991-10-01 Oil-pressure control apparatus for boom control valve of excavator

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KR2019910016189U KR960003150Y1 (en) 1991-10-01 1991-10-01 Oil-pressure control apparatus for boom control valve of excavator

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KR960003150Y1 true KR960003150Y1 (en) 1996-04-16

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JP4137431B2 (en) * 2001-11-09 2008-08-20 ナブテスコ株式会社 Hydraulic circuit
KR101980909B1 (en) 2018-02-13 2019-05-21 강남국 Incoming auxiliary apparatus for high place working vehicle
KR20240008005A (en) 2022-07-11 2024-01-18 한명석 Boom shutoff valve

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