"What is the vaporization point of the insulating oil?" Zhang Yifu asked after him.

"I don't know, it's not too high. ”

Zhang Yifu launched further thinking: "After the insulating oil is vaporized, it has flammability, and the pressure and temperature increase suddenly, and it may explode, but under normal circumstances, this vaporization will only be born in the arc extinguishing chamber, and there is a special method to exhaust the ......."

"But if this vaporization is born on the oil surface......

"The insulating oil vaporizes instantly, high temperature and high pressure, and fills the entire switch ......"

"The lowest pressure bearing capacity of the porcelain bottle ......"

"So the porcelain bottle is the most fried!"

The two looked at each other, and one by one clarified the cause and effect of this theory, and at the same time experienced a magical pleasure, which is comparable to Einstein's equation of relativity!

At this extremely excited moment, the two abandoned their emotional gender and personality for a while, and hugged each other tightly excitedly.

"Let's deduce it!" Zhang Yifu said excitedly.

"Yes, do you still have some skills!" Xia Xue also showed a different excitement.

A few seconds later, the warmth and softness of his chest came, and Zhang Yifu finally realized that something was wrong.

The two of them pushed each other away in an instant, and at the same time looked at the large army.

Luckily, no one paid attention to this.

"You...... Don't think about it...... I was so excited just now. Xia Xue lowered her head, only hating herself for being overjoyed.

"No, it's bigger than I thought. Zhang Yifu scratched his head and smiled.

“……”

After a brief embarrassment, the two could not resist the temptation of truth. Put down the conflict and start analyzing again.

"Is that kind of blistering also on the other three-section insulating rods?" Xia Xue asked.

"Yes, I thought it was a normal phenomenon, but after you reminded me, I remembered that it was caused by flashover. Zhang Yifu said, stretched out his finger and analyzed, "Then let's sort out the order." The flashover on the surface of the insulating rod is the most gentle, and then due to the vaporization of the high-temperature oil surface caused by the flashover, the high-temperature and high-pressure combustible gas fills the switch in an instant, and finally the porcelain bottle can't hold it up, and it explodes. ”

"Yes. Xia Xuetuo nodded. "But what does this mean? I don't really know much about the equipment......

There is a breakthrough. Zhang Yifu is easy to do.

There is still a lot of literature on the causes of flashover failures in switches, transformers and other equipment. After some thinking and comparison, combined with the problem of this switch, the final conclusion still falls on the "water".

"Dampness, almost only possible dampness. Zhang Yifu nodded. "The surface of the insulating rod flashovers. There must be moisture attached. It must be damp. ”

"Is it damp?" Xia Xue thought for a moment and replied, "But this switch has just been overhauled, so it should appear if it is damp?"

"Not necessarily. It is very likely that the surface humidity of each part will not be carefully checked, and it is usually just a matter of making sure that the switch parts are placed in good condition and then changing the oil. Zhang Yifu said and got up and walked towards the army, "Wait a minute, I'll call a real person to come and ask." ”

The team over there is still conducting a leakage test on the surface of the last phase switch, and Zhang Yifu knows that there will be no results, and the problem is born inside, very inside. He swept around, grabbed a fat man who looked more honest in the corner of the crowd, and pulled it over.

"Leadership...... What's the matter...... "The fat man was honestly afraid, one of his workers was arrested by the investigation team, and he was almost scared, "I'm just a worker in the maintenance workshop, I don't know anything......"

"Don't worry, just one question. Zhang Yifu brought him to the switch where the accident occurred, "Tell me the steps of this overhaul, word for word." ”

"This ...... I'm going to ask our director......"

"Isn't it the same as your director? Zhang Yifu had to show ruthlessness, "Tell you the truth, we have already found a problem with maintenance, your director is afraid of taking responsibility, he must not be telling the truth, when the time comes, we will pull out the bad luck of your whole workshop, and now honestly tell me the steps." ”

"It's not...... Leadership...... The leader ...... "How did this fat man know that Zhang Yifu was just a little technician, he listened to this big brother speak with a Beijing accent and was arrogant, and he only said that he was the leader of the department, "Leader...... We all do what we do, and there are absolutely no mistakes. ”

"Didn't say you made a mistake. Zhang Yifu said impatiently, "The rules and maintenance intensity of each factory are different, you just need to tell me the steps of this maintenance." ”

"......"

"Don't you say that I'll pull you to your factory director and talk to it?"

"Don't ......" the fat man was completely afraid.

If something happens, someone must carry the pot, and the weight and composition of this pot are also different, divided into three, six, nine and so on. Generally speaking, the deepest and darkest pot will be given to a worker at the bottom, and the higher the pot, the lighter it is.

Now the Fengzhou Power Plant is worried about who this cauldron will be smashed to, and his own little worker was dragged to the leader by the leaders of the ministry for questioning.

"I said...... I said......" the fat man cried as he clutched his pants, "and you must not say that I said it." ”

"Understand, say it. ”

In this regard, the worker who has experienced the whole process of maintenance truthfully explained a qiē.

First of all, the canopy was built, as a standard power plant, Fengzhou did a really good job, and the construction in the rainy day eliminated the possibility of water ingress. Then the lid is opened, a series of careful inspections and cleanings, oil changes, and finally a qiē is put back in place and the canopy is removed.

There is no problem with this process itself, and in this era, there are no overly detailed and strict regulations on maintenance, and the maintenance process of the Fengzhou Power Plant is already above the standard.

But here, there are still two doubts.

First, when the worker mentioned that when he checked the insulating rod, he just glanced at it, and it was no problem. In later generations, the wetter areas in the south had to be "dried" with a full switch in some cases. What Toyosu didn't do here was, of course, not because of how much of a mistake or violation they had, because there was no such rule yet.

Second, it is about the issue of insulating oil. If Zhang Yifu remembers correctly, in the morning, the first sentence of Nanjing Iron and Steel asked if there was a problem with the insulating oil, and Miao Delin's answer at that time was "the replacement cycle has not yet arrived, and the oil level is normal." Therefore, according to Meanderin, the oil was not changed.

However, this worker naturally said the two steps of "cleaning" and "oil change".

Zhang Yifu also remembered that the switch inspection usually changes the oil by the way, and it is not a valuable thing, it is not easy to open the cover of such a large switch, and it should be changed to the oil.

Now it seems that it is Miaodrin who is lying, not this fat man who is scared to pee.

So why did Miydelin say that he didn't change the oil?

The conclusion is obvious, he hopes that the accident will eventually be attributed to the water ingress of the switch, and in the explosion of the water ingress of the switch, 9o% of the accidents are due to the water ingress of the oil, the insulation has decreased, and the arc extinguishing chamber cannot extinguish the arc and explodes.

Therefore, if you want to attribute it to the equipment problem, the equipment is flooded, the oil must also be flooded, and the moisture is a long-term process, and it is impossible to enter the water just after the overhaul and just change the oil for a few hours, and the tide will reach the critical point of low insulation performance.

To sum up, if Miao Delin said that the oil had been changed, his theory of "equipment failure" would be difficult to establish, and the oil in this switch must almost be old and had not been changed.

As for the accident investigation, no one knows whether the oil has been changed or not!

After asking several more times, Zhang Yifu finally let the poor fat man go to the toilet.

At the same time, he looked at Miao Delin with a bitter face in the distance and snorted.

Dogs can't change eating, Tiansha Lao Tzu still pities you, Lao Niu, you helped the wrong person this time.

For the sake of this statement and this logic, Miao Delin must have pondered for a night, and finally unified the caliber, determined the idea, and played this flower. It's a pity that the time is limited, and the strength of this unified caliber is also very embarrassing, and it is limited to middle-level cadres at most, otherwise every worker knows about the sealing, and I am afraid that someone should leak it.

However, he was caught by Zhang Yifu and asked the key to the matter.

At this point, Zhang Yifu has already given birth to the whole process in his mind, including the direct cause of the accident.

In fact, there is almost nothing wrong with Miydelin's factory, and every process complies with the current rules and regulations.

The only thing he was wrong about was that he lied and lied to everyone that he didn't change the oil.

He wanted to rely on this little abacus to protect himself, which was good, but in Zhang Yifu's eyes, it was because of this sentence that Miao Delin's last hope of abandoning his responsibilities was buried.

The entire Fengzhou power plant was pitted by you alone, Miao Delin.

Xia Xue looked at Zhang Yifu's suddenly ruthless expression, and didn't know why: "What do you think?"

"Figured it out, totally figured it out. Zhang Yifu nodded, "If it weren't for Miao Delin lying to confuse the public, I would have figured it out a long time ago, and the leaders in the ministry and the backbone of other power plants should have figured it out a long time ago." ”

"Is there an oil change?"

"Well, that's the key. ”

Xia Xue also had to think about it, she didn't believe that she had a lower IQ than Zhang Yifu.

Oil change, no oil change.

Wet, not damp.

The oil is damp, and the insulating rod is damp.

A few minutes later, she finally rushed to the contemplative Zhang Yifu as if she had been empowered: "I understand!"

"Stupid, I don't understand until now. Zhang Yifu said impatiently again, "I think about it, don't recruit me." ”

"What else do you want to think about?" Xia Xue said puzzledly, "This time you came up with it, I won't fight with you, you can say it." ”

"Silly boy. Zhang Yifu shook his head helplessly, "We have determined that it is damp, but we have not yet determined why it is damp." ”

"......," Xia Xue nodded her chin and said, "Needless to say, the seal is not good." ”

"Silly. ”

kept being called stupid by Zhang Yifu, Xia Xue was a strong disobedience, and she had to think about it deeply. (To be continued!)

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