| 摘要 |
A control unit/hydraulic control mechanism for controlling the hydraulic working appliances of a mine roof support unit has a control unit mounted on one side of a distributor plate, and a valve block mounted on the other side of the distributor plate. The distributor plate and the valve block constitute the hydraulic control mechanism, the valve block being constituted by a stack of pilot-operated hydraulic control valves. The control unit has a protective casing defining first and second chambers. The first chamber accomodates a plurality of electromagnetic valves. The second chamber constitutes a lead-through chamber for leading electric cables to the electromagnetic valves. The second chamber is provided with a respective socket for each of the electric cables. Each of the sockets is shaped to mate with a complementary member attached to the associated electric cable, whereby the electric cables can be connected to the control unit so as to resist tensile forces, and in such a manner that the interior of the second chamber is sealed with respect to the external atmosphere. |
