What are the characteristics of concrete mixing station equipped with two-machine control system?

Let's first look at the concrete mixing station equipped with dual-machine control system specific features:

First, it has two control modes: linkage, manual and flexible switching. High degree of automation. The linkage process is: start the equipment after starting the mixing motor of the mixing station, start the aggregate weighing instrument, cement weighing instrument and water weighing instrument, and unload the aggregate to the lifting bucket automatically when the aggregate ingredients are finished, and the lifting bucket rises automatically after the unloading. Upon reaching the upper limit, the aggregate is automatically stopped and discharged to the mixer. Cement and water begin to unload and stop unloading until it reaches zero. The lifting hopper drops automatically after unloading (the pause time is adjustable). The operator observes the concrete mixing situation, and then presses the unloading button of the concrete mixer to complete the linkage process.

2. The electric box of the control system of the concrete mixing station has the function of preventing two times of water addition. The concrete mixer can effectively avoid the phenomenon of adding water when the bucket is lifted again, so as to avoid the loss caused by it.

3. Brand components are used in key parts of control box, such as lifting bucket motor, which works frequently due to heavy load. And it is one of the core of the mixing station. In this regard, we adopt special motor protection switch. So as to ensure the reliable operation of the lifting bucket motor.

4. Aluminum alloy etched panel is used in the control system of concrete mixing plant, which makes the operation clear and beautiful.

Fifth, the instrument of concrete mixing station adopts high precision famous brand device, which can sample quickly and weigh accurately. Formula input, instrument calibration is convenient. In view of the characteristics of the field mixing station and our more than ten years'experience in assembling and manufacturing the control box of the mixing station, special treatment has been taken to the control circuit of the instrument, which can ensure the reliable operation of the instrument.

Sandstone is generally called aggregate (also known as aggregate), which means that it plays the role of skeleton in concrete. Coarse aggregate refers to the stone with a diameter greater than 5 mm. In a mixing station, the particle size of a pebble is not more than 80 mm and the particle size of gravel is not more than 60 mm. Fine aggregate refers to sand and gravel with a particle size of less than 5 mm. It mainly refers to sand. It is usually divided into coarse sand, medium sand, fine sand and extra-fine sand. According to its particle size specification, it is expressed by fineness modulus from 0.7 to 3.7.

Sandstone aggregates generally require that their particle size gradation is good, that is, the size of the head is large or small, can fill each other with voids. In this way, the formed concrete is compact and easy to be segregated during transportation.

Cement is a kind of hydraulics cementitious material, which mainly plays a cementing role in concrete. General cement is commonly used in civil engineering. In addition to the selection of cement according to the characteristics of various kinds of cement, the amount of cement used in concrete mix proportion is mainly determined by the strength index. The strength of cement is reflected in the strength grade of cement (formerly known as label). The strength grade of cement is formed by the strength obtained from the compressive test of 28-day mortar blocks. For example, the 28-day strength of cement with 425-day strength grade is about 42.5 Mpa. If the storage of cement exceeds 3 months from the date of the factory, its strength shall be re-examined.

The strength of cement in concrete should be slightly higher or equal to that of concrete. When the strength of concrete is very low, admixtures can be used to save cement. The maximum amount of cement in each concrete should not exceed 550 kg.