| 摘要 |
Stopper unit of inspection pit hatch cover has stopper unit of hatch cover, pin, key and connection plug to connect the pin and the key shaft, at that in the upper part the pin is connected to connecting plug by thread and the pin is placed with possibility of its rotation on the cramp at the lower side of the inspection pit hatch cover, and in the lower part of the pin first nut is placed, this can move along the pin at turn of the key to bring into action stopper node of hatch cover, at that at one side of the key shaft has rotary handle, and the other part of the key shaft is arranged with possibility of coupling with the upper part of the pin, in the hatch cover opening is provided. The key shaft is connected to the upper part of connecting plug through stopper.
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