发明名称 |
Hydraulic drive servo control for conveyor devices - has four-way proportional valve and electro-hydraulic pre-control valve |
摘要 |
<p>The servo system controls the differential cylinders of beam and chain conveyors in steel works and rolling mills using electrohydraulic direction valves and through valves. A four-way proportional valve (11) with an electrohydraulic pre-control valve (12) and a hydraulic main valve (13) is used as direction and through-flow control element and is installed at a distance (up to 25000 mm) from the hydraulic drive (4), e.g. in the control panel, and connected via pipes (7,8) to the drive. The pre-control valve of the four-way proportional valve is installed a relatively long way from the drive whilst the main valve may be near the drive, the two valves being connected by pipes.</p> |
申请公布号 |
DE2952098(A1) |
申请公布日期 |
1981.07.02 |
申请号 |
DE19792952098 |
申请日期 |
1979.12.22 |
申请人 |
SIEMAG TRANSPLAN GMBH |
发明人 |
SCHUER,WILHELM;JUENGST,HEINZ |
分类号 |
F15B13/043;(IPC1-7):65G43/00 |
主分类号 |
F15B13/043 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|