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

"I don't know, it won't be too high."

Zhang Yifu further thought: "After the insulating oil is vaporized, it is combustible, and the pressure and temperature suddenly increase, which may explode, but under normal circumstances, this vaporization will only occur in the arc extinguishing room, and there are special methods to exhaust the gas..."

"But if this vaporization occurs on the oil level..."

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

"Porcelain bottles have the lowest pressure bearing capacity..."

"So the porcelain bottles are the most frying!"

The two looked at each other, and each person clarified the theoretical cause and effect in one sentence, and at the same time experienced a magical pleasure, which was as good as Einstein's discovery of the equation of the theory of relativity!

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

"We have deduced this!" Zhang Yifu said excitedly.

"Yes, do you still have some skills?" Xia Xue also showed excitement different from the past.

A few seconds later, the warmth and soft touch on the chest came, and Zhang Yifu finally realized that something was wrong.

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

Fortunately, no one paid attention to this place.

"You... don't think too much... I was so excited just now." Xia Xue lowered her head, only regretting that she was too happy.

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

“…”

After a brief embarrassment, the two could not withstand the temptation of truth. They let go of the war and began to analyze again.

"Is such bubble phenomenon also happening on the other three insulating rods?" Xia Xue asked.

"Yes, I thought it was a normal phenomenon. I remembered it was caused by flashovers after you reminded me." Zhang Yifu said, waving his finger and analyzing, "Then let's sort it out in sequence. The flashovers on the surface of the insulating rod first occurred, and then the oil surface vaporized due to the high temperature caused by flashovers. In an instant, the high temperature and high pressure combustible gas filled the switch. In the end, the porcelain bottle could not hold on and exploded.

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

With a breakthrough, Zhang Yifu will be able to do it.

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

"It is almost possible that it is damp." Zhang Yifu nodded. "The surface of the insulating rod flashes. There must be moisture adhesion. It must be damp."

"Does it get wet?" Xia Xue replied for a moment, "But this switch has just been repaired. If we get wet, we should have discovered it?"

"Not necessarily. It depends on the meticulousness of the maintenance. It is very likely that the surface humidity of each part will not be carefully checked. Usually, it is just to make sure that the switch is placed without any problem, and then change oil." Zhang Yifu said as he stood up and walked towards the main force, "Wait a moment, I'll call someone to come and ask."

The team there was still on the surface of the last phase switch and conducted a leakage test. Zhang Yifu knew that there would be no result. The problem occurred inside, very inside. He swept around, grabbed a fat man who looked more honest in the corner of the crowd, and grabbed it.

"Leader...what's going on..." The fat man was so frightened that a worker was arrested by the investigation team. He was so scared that he was just a worker in the maintenance workshop. "I'm just a worker in the maintenance workshop and I don't know anything..."

"Don't worry, it's just one question." Zhang Yifu took him to the switch where something happened, "Tell me the steps of this maintenance are word for word."

"This... I want to ask our director..."

"Is it the same for your director? Just tell me if you know." Zhang Yifu had to show his ruthlessness, "To be honest, we have discovered the problem of maintenance. Your director is afraid of taking responsibility, so he will definitely not tell the truth. Then we will pull out all the people in your workshop and be unlucky. Now I will tell me the steps honestly."

"No...leader...leader..." The fat man didn't know that Zhang Yifu was just a little technician. He listened to the elder brother's speech and spoke arrogantly, saying that he was the leader of the department. "Leader... we all do it according to the rules and absolutely no mistakes."

"I 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."

"Can……"

"If you don't say anything, I'll take you to your factory manager and say it?"

"No..." The fat man was completely scared.

If something happens, someone will definitely take the blame. The weight and composition of the pot are also different, and they are divided into different levels. Generally speaking, the pot with the heaviest and darkest will be given to the worker at the bottom, and the pot with the higher the pot, the lighter it will be.

Fengzhou Power Plant is now worried about whom to smash the pot. This little worker was dragged to the leader by the leader in the department and asked. Isn’t it hit the pot? I just started to get my partner, and my family won’t be destroyed after the punishment!

"Leader, I said...I said..." The fat man cried with his pants in his arms, "Don't say I said it."

"I understand, tell me."

In this regard, the worker who had gone through the entire maintenance process truthfully explained everything.

First, we set up a canopy. As a power plant that meets the standards, Fengzhou did a good job in this. The construction eliminated the possibility of water inlet on rainy days. Then we opened the cover, carried out a series of careful inspections and cleanings, changed the oil, and finally put everything in place and removed the canopy.

There is no problem with this process itself. In this era, there are no too detailed and strict regulations on maintenance, and the meticulousness of the Fengzhou Power Plant is already above the level.

But there are still two doubts here.

First, when the worker mentioned checking the insulating rod, he just took a look and passed it without any problem. In later generations, in the humid areas of the south, in some cases, the full switch "drying" treatment was required. Fengzhou did not do it here, of course it was not because they made a big mistake or violation, because there was no such rule yet.

Second, that is the question about insulating oil. If Zhang Yifu remembered correctly, in the morning, Nangang asked if there was any problem with insulating oil in the first sentence. At that time, Miao Delin's answer was "It has not reached the replacement cycle, and the oil level is normal." Therefore, according to Miao Delin's statement, the oil was not replaced.

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

Only then did Zhang Yifu remember that when checking the switch, he usually changes oil by the way, and it is not a valuable thing. It is not easy to open such a large switch once, so it is natural that the oil should be replaced.

Now, it is Miao Delin who lies, not this fat man who was scared by himself.

So why did Miao Delin say that there was no oil change?

The conclusion is obvious. He hopes to ultimately attribute the accident to the switch water in. In the accident where the switch water in, 90% of the accidents caused by the explosion are caused by the oil entering the water, the insulation level decreases, and the arc extinguishing room cannot be extinguished and exploded.

Therefore, if we want to attribute the equipment problem, the oil must also enter water. The moisture inlet is a process that has been exposed to moisture. It is impossible to enter water after just after the maintenance is completed and the oil is replaced for a few hours, and the moisture is so low that the insulation performance is below the critical point.

In summary, if Miao Delin had changed the oil, his theory of "equipment failure" would be difficult to establish. The oil in this switch must be almost old and has not been replaced.

As for the time of the accident investigation, no one knows whether the oil has been replaced!

After Zhang Yifu asked several more questions, he finally let the poor fat man go to the bathroom.

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

Dogs can't change their shit, and I still feel sorry for you, Lao Niu, you helped the wrong person this time.

For this statement and logic, Miao Delin must have thought about it all night before finally unifying the caliber, determined his ideas, and played with this flower. Unfortunately, time is limited, and the intensity of the unified caliber is also embarrassing. At most, it is limited to middle-level cadres. Otherwise, every worker would know the closure, and someone should have leaked it.

But Zhang Yifu caught a fat man and asked the key point of the matter.

At this point, the entire process had already emerged in Zhang Yifu's mind, including the direct cause of the accident.

In fact, Miao Delin's factory did almost nothing wrong, and each process complies with current rules and regulations.

The only thing he was wrong was that he lies and told everyone that he had not changed the oil.

He wanted to rely on this little calculation to protect himself, but in Zhang Yifu's eyes, it was because of this sentence that ruined Miao Delin's last hope of clearing his responsibilities.

You cheated on the entire Fengzhou power plant by yourself, Miao Delin.

Xia Xue looked at Zhang Yifu's sudden fierce expression, and was confused, so she said: "What are you thinking? You have figured it out?"

"I figured it out, I figured it out completely." Zhang Yifu nodded, "If Miao Delin hadn't lie and confused the public, I should have figured it out long ago. The leaders in the department and the backbone of other power plants should have figured it out long ago."

"Is it a matter of changing the oil?"

"Well, that's the key."

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

Change the oil, not the oil.

Be moist, not moist.

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 was enlightened and said, "I understand!"

"Silly, I only understand now." Zhang Yifu said impatiently again, "I want to do something, don't ask me."

"What else do you think about? Don't you say it?" Xia Xue said in confusion, "You came up with this time. I won't argue with you, go and talk."

"Silly child." Zhang Yifu shook his head helplessly, "We have confirmed that we are wet, but we haven't yet determined why wet."

"..." Xia Xue lit her chin and said, "It's more important to say, the seal is not good."

"stupid."
Chapter completed!