KR960011128A

KR960011128A - Control circuit of rocking cylinder for rocking valve type concrete pump

Info

Publication number: KR960011128A
Application number: KR1019950003187A
Authority: KR
Inventors: 다께요시 오끼
Original assignee: 도미끼 마사히꼬; 이시까와지마 겐끼 가부시끼가이샤
Priority date: 1994-09-16
Filing date: 1995-02-20
Publication date: 1996-04-20
Also published as: JPH0886275A; JP3477560B2

Abstract

본 발명은 요동관의 절환저항의 변화에 대하여 저압과 고압의 2단으로 절환시킬 수 있게 하고, 또한, 펌프의 운전정지시의 누적기의 잔류압력을 소명시킬 수 있게 하기 위하여, 유류펌프(14)로 부터 배출된 가압유를 요동 실린더(12,13)로 공급하는 가압유배관(15)에 누적기(ACC)와 전자기적 절환밸브(17)를 설치하고 제어회로의 상기 누적기의 상류쪽고의 가압유배관(15)에 저압용 릴리프밸브(19)와 고압용 릴리프밸브(22)를 설치하고, 고압용 릴리프밸브(20)의 작동측의 배관(23)에 펌프의 운전중에는 유로를 차단하며 펌프의 운전을 정지하면 유로를 연결하는 자동압력 소멸용 전자기밸브(24)를 설치하고, 누적기(ACC)의 잔류전압을 소멸시키게 한다.The present invention allows the oil pump 14 to switch between two stages of low pressure and high pressure with respect to the change in the switching resistance of the oscillation pipe, and to enable the residual pressure of the accumulator to be clarified when the pump is stopped. The accumulator (ACC) and the electromagnetic switching valve (17) are installed in the pressurized oil pipe (15) for supplying the pressurized oil discharged from the to the swinging cylinders (12, 13) and upstream of the accumulator in the control circuit. The low pressure relief valve 19 and the high pressure relief valve 22 are installed in the pressurized oil pipe 15 of the high pressure relief pipe 15, and the flow path is shut off during the operation of the pump to the pipe 23 on the operating side of the high pressure relief valve 20. When the pump is stopped, the automatic pressure quenching electromagnetic valve 24 for connecting the flow path is installed, and the residual voltage of the accumulator (ACC) is extinguished.

Description

Control circuit of rocking cylinder for rocking valve type concrete pump

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명의 제어호로의 일례를 도시한 개요도,1 is a schematic diagram showing an example of the control arc of the present invention;

제2도는 요동밸브형 콘크리트펌프의 부분을 도시한 단면도,2 is a cross-sectional view showing a part of the rocking valve concrete pump,

제3도는 콘크리트펌프의 요동관을 요동시키는 부분을 도시한 도면,3 is a view showing a portion of rocking the rocking pipe of the concrete pump,

제4도는 종래의 요동실린더의 제어회로를 도시한 개요도.4 is a schematic diagram showing a control circuit of a conventional rocking cylinder.

Claims

An accumulator and an electromagnetic switching valve are provided in a pressurized oil line that supplies pressurized oil from an oil pump to swing cylinders. A low pressure relief valve in the pressurized oil pipe upstream of the accumulator of the control circuit of the swing cylinder for a swing-valve type concrete pump provided with a magnetic switching valve. valves and a high pressure relief valve are provided separately so that these two relief valves are connected to a tank via a pressure switching electromagnetic valve. One of the valves is energized by the operating pressure oil pipe of the relief valve during operation to block the flow path (energizing), and when the operation is stopped, die (dienergizing) to connect the flow path to the tank. The control circuit of the automatic pressure decay swing cylinder for swinging the valve type, characterized in that the concrete pump has a configuration in which installation the electromagnetic valve.

※ Note: The disclosure is based on the initial application.