Aggregate standby hopper, concrete batching plant and aggregate standby hopper unloading method

Abstract

The invention discloses an aggregate standby hopper, a concrete batching plant and an aggregate standby hopper unloading method, wherein the aggregate standby hopper comprises a standby hopper main body, and a hopper valve body arranged below the standby hopper main body; a hopper valve is arranged at the upper part of the hopper valve body, and comprises a first valve and a second valve; the first valve is connected with a first driving device for driving the opening / closing of the first valve; and the second valve is connected with a second driving device for driving the opening / closing of the second valve. When the aggregate standby hopper is unloaded, excessive resistance of a main mixing machine is not generated, so that the current peak of a motor of the main mixing machine can be prevented from suddenly increasing to exceed the critical current peak.

Description

technical field [0001] The invention relates to the field of concrete mixing, in particular to an aggregate waiting hopper, a concrete mixing station and a method for unloading the aggregate waiting hopper. Background technique [0002] At present, the technological process of concrete production in concrete mixing plants is as follows: After the aggregate (sand, stone) is metered and batched, it is sent to the aggregate hopper above the mixing host through a belt conveyor or hoist, and after receiving the feeding signal, the cylinder drives the aggregate. After the material hopper valve is opened, all the aggregate is put into the mixing main engine, and the door closing signal is received, and the cylinder drives the aggregate until the hopper valve is closed. While the aggregate is waiting to be fed in the aggregate waiting hopper, the measurement of the aggregate and the mixing of the concrete in the main machine can be carried out simultaneously, which improves the prod...

AI Technical Summary

Problems solved by technology

In order to ensure the production efficiency of the mixing station, the unloading time of the hopper valve is generally short. When the valve is fully opened, a large amount of aggregate is instantly unloaded from the hopper into the main mixer. On the one hand, the aggregate (sand, stone) and water, Admixtures and cement cannot be mixed evenly in time, which will affect the quality of concrete materials, or cause the mixing time to increase greatly, which will affect the mixing efficiency. On the other hand, it will also increase the instantaneous resistance of the stirring shaft of the main mixing machine. The instantaneous increase of the shaft resistance will cause the load of the main engine motor to increase instantaneously, which will cause the peak current of the main engine motor to increase suddenly.

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