Constant-pressure water supply device and constant-pressure water supply method for concrete dry mixing plant

Abstract

The invention relates to the technical field of liquid ingredient metering in a dry mixing plant, and particularly discloses a constant-pressure water supply device and a constant-pressure water supply method for a concrete dry mixing plant. The method specifically comprises the following steps that whether the water level of a water tank is above the lower limit of the liquid level or not is judged, if not, an air inlet mechanism is closed and an exhaust mechanism and a water inlet mechanism are opened to add water, and if yes, the next step is executed; the exhaust mechanism and the water inlet mechanism are closed, and the air inlet mechanism is opened to pressurize; whether the pressure of the water tank reaches a preset water supply pressure value or not is judged, if not, pressurization continues, if yes, pressurization is stopped, the air inlet mechanism is closed, and a water supply signal is waited; and the water supply signal of the mixing plant is received, and a pump-free water drainage mechanism is opened for water supply. Constant-pressure continuous water supply can be achieved, the water supply amount is accurately metered through a flow meter, the humidity stability of dry mixing materials can be guaranteed, pilling and blocking of the materials caused by water dripping can be avoided, the influence of air existing in a pipeline on the precision of the flow meter can be avoided, the water supply precision can be improved, and the metering efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of liquid ingredient measurement in a dry mixing plant, and in particular relates to a constant-pressure water supply device and a constant-pressure water supply method for a concrete dry mixing plant. Background technique [0002] With the promotion and popularization of complete sets of concrete equipment such as concrete mixing plants, users have higher and higher requirements for product quality. In particular, the batching accuracy of the batching system, which is directly related to the cost and quality of finished concrete, is the most important thing that users pay attention to. [0003] One of the ingredients of the concrete dry mixing plant is water, and the water supply is highly sensitive to the influence of the dry mixing results. The existing technology generally uses a water pump to drive water discharge. During the use, it was found that when the pump was switched on and off, the water flow ...

AI Technical Summary

Problems solved by technology

However, in the production process, due to the influence of various factors, there is often a difference between the batching amount and the target amount during batching, resulting in low powder batching accuracy of the batching system of the concrete batching plant, and it takes time to stabilize the scale. Water supply metering efficiency needs to be improved

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