After intense preparation and commissioning work, the concrete batching plant of Huhai Zhongsheng New Building Materials Co., Ltd. is finally about to carry out trial production!

This day is a very important day for the mixing plant, if the trial production is not smooth, it means that there will be more problems in the future, and more importantly, the color is not good. So generally speaking, before the trial production, the chicken must be killed, and the chicken blood is poured around the mixing station, although this seems a bit superstitious, but everyone does this, so Li Ruoyu does not reject it.

Early in the morning, Li Ruoyu came to the company with Anna, and if there was no problem with the trial production, Anna would take the technicians of Shi Weiying's company back to Germany.

The people in the company are basically here, and the two operators are also sitting in the industrial control room, waiting for the trial production under the guidance of German experts.

Of course, the laboratory is also fully prepared, and the trial production of concrete is not only to test whether the production equipment can operate normally, but also to test whether the concrete produced meets the technical requirements, which is the so-called opening identification.

Of course, Li Liangfeng is going to be a coolie, who taught him that he is the only labor force in the technical quality department now!

Li Ruoyu gave an order, and two workers picked up the big rooster that had been prepared long ago, one grabbed the rooster that was constantly fluttering, and the other picked up the bright kitchen knife and cut it on the rooster's neck, and immediately the chicken blood spurted out.

Anna hurriedly grabbed Li Ruoyu's hand and said in a sympathetic tone: "Li Ruoyu, why do you have to kill chickens? Isn't this too cruel? I have never heard of such a thing in Germany." ”

Li Ruoyu laughed and said: "Anna, haven't you ever eaten chicken? Aren't all chickens killed like this? In our concrete industry in China, not only do we have to kill chickens before trial production, but we also have to kill chickens and set off firecrackers before new production starts every year!

Fortunately, this time the chicken killing was very smooth, the big rooster was bloodied, and after being drenched around the mixing station, it was already dead, only occasionally twitching. If there is a situation where chickens run around, Li Ruoyu will have to worry, if there is no problem today, I am afraid that there will be a lot of problems this year.

According to the convention, after the chickens are killed, they can be commissioned and produced, and when the first car of concrete is produced, it is time to set off firecrackers.

At this time, the technical engineers under Anna, as well as the operators and mechanics under Li Ruoyu, began to get busy. Because of this kind of sophisticated equipment, it is also more complicated to debug.

The commissioning work is divided into ten parts: power cabinet and operating table, belt transmission system, electronic metering system, aggregate station batching system, powder batching system, additives and water weighing system, mixer and dust removal system, air compressor, computer and interface, and overall commissioning.

The technical team leader under Anna gave an order: "First of all, debug the power cabinet and the operating table!"

Several German engineers and the mechanic operators of Zhongsheng Building Materials are busy, some check whether the three-phase power supply is balanced and stable, whether there is a lack of phase, some check whether the circuit has a short circuit, ground, misconnection phenomenon, check the rationality of the wiring, some check the model and layout of the components against the electrical drawings, and some use a multimeter to check whether the line has a short circuit and misconnection, if there is a short circuit or doubts, the problem should be completely investigated, before the next step can be carried out.

Next, I was busy checking the insulation of the motor with a 500V shake meter to see if there was a phenomenon to the ground; then checking whether the grounding wire was in good contact and firm; then checking whether the sensor signal line was as far away as possible from the high current line; and checking the electrical parameters of each electrical component in the power cabinet.

Then check the correctness of the circuit: an engineer disconnects all the circuit breakers and fuses; then a machine repairs the main circuit breaker, closes the power switch after turning on the fuse, and checks whether the output of the transformer is normal; after the high-voltage part is finished, check whether the output of the 24v switching power supply is normal; and the fuse is also turned on one by one, the PLC controls the power supply to get power, the panel power indicator light works, and the weighing instrument gets power.

Then several German engineers carefully observed whether all the components were hot and burnt, and it must be said that the seriousness with which the Germans worked was really the most commendable in the world, and they did not let go of such details.

Li Ruoyu said with a smile: "Anna, your engineers are too serious, those details are generally no problem, if it is a Chinese engineer, those steps must be omitted." ”

Anna smiled: "This is the reason why your country can't manufacture precision equipment, and your cars, planes, especially engines, are because they lack this kind of serious and meticulous work attitude, so they can't achieve precision technology, isn't this the reason why your country is far behind Europe in these aspects?"

Li Ruoyu nodded and said: "This is also true! If you want to say that the most industrially developed country in the world, I think it is still Germany, take concrete construction machinery as an example, Germany is definitely the first in the world, and the next should be Italy and Japan. ”

Li Ruoyu also knew that later China could not get rid of the current situation, and China's products had a resounding name in the world, which was called cottages. Why is it called a copycat, because you always imitate other people's, and although the things you make are cheap, the quality is far inferior to other people's.

Li Ruoyu hopes that at least in concrete and concrete machinery, he can make investment, and in the future, he must surpass the world's advanced level in this area and win glory for the country.

Next, those engineers used a multimeter to check the accuracy of each voltage one by one according to the schematic diagram, then checked the correctness of the PLC input part of the circuit, and then put the PLC in the "STOP" position, and then checked the on/off of all the knob switches, button switches and on-site emergency stop switches on the panel one by one.

The machine repair of Zhongsheng company went to the mixing building again, and checked the limit switch, level gauge, and compressed air pipeline contact pressure gauge one by one; even checked the maintenance protection switch, pressed the motor start button when the maintenance door was opened, and whether there was a signal input at the PLC input point; and then checked the correctness of the external circuit of the PLC output part one by one.

Although it is good to be careful and meticulous, it consumes more time, and when these are checked, it takes more than an hour. Fortunately, today is a trial production, as long as dozens of cubic meters of concrete are produced, which is used to pour the ground of the mixing plant's own home, so it is not too urgent. (To be continued.) )