| 摘要 |
This invention relates to a hydraulic valve (10) and an interconnected hydraulic valve system, (10,12). Two coaxially disposed pipes (14,20) are positioned vertically to form an annular space (11) there between. A flange (22) provided with an external seal (23) cooperates with an end of the outer pipe (20). Openings (18) formed in the inner pipe (14) regulates water flow. The inner pipe is also sealingly interconnected with a main supply pipe (12) for entry of water through opening (16). An electrical motorized hoist (26) provides for activation and operation of the hydraulic valve system.
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