Concrete mixing plant laboratory instruments

The laboratory instrument of the concrete mixing plant is a device for conducting carbonation tests on concrete, using imported infrared principle carbon dioxide sensors.

Below, the editor will introduce the various components, structures, and working principles of laboratory instruments in concrete mixing plants:

1. The temperature sensor of the equipment measures that the temperature inside the box is lower than the control value *, and the control instrument sends a command. The heating element starts working. When the temperature inside the box reaches the temperature control value, the heating element or compressor stops working, thus achieving the goal of constant temperature inside the box.

2. The device is a closed box, with the test piece placed on the partition inside the box, and then automatically controlled by a microcomputer according to the set temperature, relative humidity, and CO2 concentration to ensure constant temperature, humidity, and CO2 concentration inside the box. The carbonization test chamber is mainly composed of a box body, an integrated control system for temperature, humidity, and carbon dioxide concentration.

3. Using color changing silicon with good moisture absorption properties for dehumidification, when the temperature inside the box is higher than the control value *, the humidity control instrument outputs a signal command to work, and automatically stops working when it reaches the upper limit control value within the hysteresis. When the humidity inside the box is lower than the control value *, the controller outputs a command and the humidifier starts spraying moisture. Automatically stop when the humidity reaches the lower limit control value and returns to the difference.

4. The outer panel of the box is made of cold-rolled steel plate, coated with electrostatic powder, the inner panel is made of high-quality embossed aluminum plate, and the insulation layer is made of polyurethane foam as a whole. The shelf is made of plastic frame. Has good insulation, sealing, and corrosion resistance properties.

Before using the laboratory equipment of the concrete mixing plant, it is necessary to carefully read the technical manual, familiarize oneself with the technical indicators, usage methods, working performance, and precautions, and strictly follow the steps in the instrument manual for operation.

The method of adjustment is: there is an adjustment knob in the middle of the glass mask of the pressure gauge, and its upper and lower limits can be adjusted to the set value with the help of a Phillips screwdriver. Twist the upper limit pointer to the position specified for the test pressure, and the lower limit pointer to a position 0.05Mpa lower than the upper limit. This way, when the pressure reaches the required value (upper limit) during operation, the pressurization will automatically stop. When leakage or seepage causes the pressure to drop to a certain value (lower limit), the air pump automatically starts to supplement the pressure. For example, the test pressure requirement is 0.3Mpa. Set the upper limit pointer in the middle of the watch case to the 0.3 position on the dial, and then use a screwdriver to screw the lower limit pointer in the middle to the 0.25 position.