| 摘要 |
The invention relates to a valve 120 , especially a check valve, for hydraulic plungers ( 3 ) of shield-type support frames in underground mining with a valve housing 121 and a switchable valve insert received therein, connections 126 - 129 for high pressure lines connected to the cylinder chamber and/or the annular space of the hydraulic cylinder 3 , and at least one connection 30 for an additional unit such as a pressure relief valve, a pressure sensor, and/or a pressure display. The valve housing 121 can be mounted to the hydraulic cylinder 3 , and in the mounting stage, the connections 125 - 129 on the valve housing 121 extend axially parallel to the axis of the hydraulic plunger 3 . According to an advantageous further embodiment, the valve housing can be provided with at least one fastening means for an extension housing 40 that can be mounted in a releasable manner to at least one side wall 22 B thereof for additional hydraulic functions of the shield-type support frame (see FIG. 2 ).
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