High accuracy concrete mixing equipment

The measurement accuracy of concrete mixing equipment determines the quality of the concrete and is also an important factor related to the quality of the engineering. Therefore, it is imperative to improve the measurement accuracy of the concrete mixing plant.

1, Improve the measurement accuracy of the aggregate measurement system

First, choose a sensor with reasonable range, high accuracy, stability and reliability, and strong anti-interference ability, and use a shielded cable with strong anti-interference ability as the connecting wire of the sensor and the control system. The connecting wire should try to avoid the appearance of the line connector. Avoid, shielding and waterproofing should be done after connection.

Secondly, starting from its structure, the general concrete mixing plant aggregate metering system is equipped with coarse and fine metering openings, but the precision of its precise metering often cannot meet the requirements of high-speed railways and other measurement accuracy, which requires The precise metering opening can be improved, and measures to reduce the size of the precise metering opening can be used to reduce the amount of drop in the aggregate to reduce the impact of good aggregate drop on the measurement accuracy, thereby improving the measurement of the aggregate system precision.

2, Improve the measurement accuracy of the powder measurement system

As a cementing material for concrete, powder is an important part of concrete, and its measurement accuracy is also crucial. Improving the measurement accuracy of the concrete mixing equipment powder measurement system can be handled in the following two ways.

First of all, as with the aggregate measurement system, sensors with reasonable range, high accuracy, stability, reliability, strong anti-interference ability, and high-quality shielding wires should be selected, and wire connectors should be avoided as much as possible. If connectors appear, shielding and waterproofing should be performed. Measures.

Secondly, to improve the feeding structure, the single screw conveyor feeding structure is commonly used in concrete mixing plants. It is difficult for this structure to control the amount of powder drop to meet the high precision requirements of the metering system, so the concept of coarse and fine metering in the aggregate system can be introduced, that is, the precision metering screw conveyor (ie small-diameter screw conveyor), the precision metering screw conveyor can be directly connected under the powder tank (requires the powder tank to have two discharge ports), or a coarse and fine metering integrated screw conveyor can be used. The precision measuring screw conveyor can realize the control of the powder drop, that is, it can improve the measurement accuracy of the concrete mixing equipment powder system.