| 摘要 |
A device indicates the level of concrete within the hopper of a concrete pum p and prevents accidental overflow and spills. The concrete level indicator device includes an elongate post with an enlarged float fixed to the bottom end and a guide sleeve for allowing vertical telescoping movement of the post as the concrete level in this hopper change s. A retaining collar attaches to a screen in the hopper o~ the pump and surrounds the guide sleev e for limiting swinging movement of the post and guide sleeve, thereby maintaining the devi ce in a vertical position within the hopper with the float resting on the concrete, As concre te is filled into the hopper, the post rises through the guide sleeve until a visual indicator (e. g, a red band) on the top end of the post is visibly exposed alcove the guide sleeve, thereby alerting the operator to interrupt the discharge of concrete being filled in the hopper until the concrete level drops and the visible indicator on the post is no longer visible.
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