After resting for a night in "Xingtai International Foreign Trade Company", Zhao Guoyang took a taxi to "SS Construction Machinery Group Company".
In the new product research and development department, as soon as Zhao Guoyang entered, he saw many people gathering together to discuss problems.
"Minister Zhao, I think that our mine hoist, in terms of electrical protection measures, is worth discussing."
A stubborn voice said: "The existing protection measures on this mine hoist can only play a role in normal operation, but in the deceleration stage of the hoist, these electrical protections cannot play a protective role at all, and may bring hidden dangers to safety production."
The voice that spoke seemed familiar, and Zhao Guoyang remembered this person after recalling it a little.
This person is Kong Dezhong from the Department of Mechanical and Electrical Engineering of Jingcheng University, and he, Xu Linlin and Chen Li are both students of Ji Chongxuan and Ji Lao, and they are also the three people with the lowest education in the team brought by Ji Lao.
Listening to Kong Dezhong's questioning words, Zhao Guoyang couldn't help but step forward and ask: "What's the matter, is there something wrong in the trial production process?"
"Ah Guoyang Mr.
Zhao" The first to react was Zhao Siyan, looking at Zhao Guoyang who was walking towards her, she couldn't help shouting.
The rest of the people gathered together, after seeing Zhao Guoyang, the boss, come over, they also greeted him respectfully.
Among them, Yuan Qinghua, Liu Yan, and Tang Wanru of Jingcheng University are all there.
In "SS Company", there were also several technicians from the new product development department present.
Zhao Guoyang waved his hand to stop everyone's "shush cold and ask for warmth", turned his head to look at Kong Dezhong, who had spoken before, and said: "Dezhong, just now you said that the electrical protection of our mine hoist is defective."
After listening to Zhao Guoyang's question, Kong Dezhong nodded again and again: "Yes, Mr.
Zhao."
Our mine hoist has now entered the trial production stage.
Except for some special materials, which also need to be prepared, there are no problems in production. ” "It's just that when we reviewed the drawings in the past two days, we found a question" Hearing this, Zhao Guoyang nodded encouragingly and said, "Well, if you have any questions, raise them as soon as possible, it's a good thing, let's talk about it, what is the situation?"
Kong Dezhong replied and told his discovery.
"Mr.
Zhao, our mine hoist adopts a full digital DC electronic control system, which uses low voltage to provide electrical protection for the entire system."
"According to your point, the rope speed design of our hoist, the maximum speed reaches 511s, at this running speed, the running trajectory of our hoist, which is approximately triangular, is very stable."
"It's definitely no problem when used normally. left and right, and nothing will go wrong. ” Hearing this, Zhao Guoyang nodded in agreement and said, "Well, that's right."
The movement trajectory of the triangle is indeed the safest and most reliable. ” Everyone is no longer surprised that Zhao Guoyang can find the key so quickly.
After Kong Dezhong bowed his head slightly, he continued: "Of course, there is no problem with normal use, but there is a situation that we can't help but take into account."
"The deceleration curve of the tugboat plate of our mine hoist, because the speed is very fast, the stroke is naturally short and steep, and the corresponding response of the control element is somewhat unable to keep up with the actual operation."
"The original design of overspeed protection in the deceleration phase may not be able to achieve closed-loop control because of the unstable speed, so that it is useless."
When Kong Dezhong spoke, Xu Linlin and Chen Li, two classmates, also nodded lightly on the side.
Clearly, all three of them are on the same page.
Under Zhao Guoyang's instructions, Kong Dezhong's narration continued: "Some time ago, we went to several mineral deposits in southern Anhui Province for field investigation. ” "In the course of the investigation, we found that most of the tank cages of the mine hoist almost completely relied on the wellhead signalman to stop when they stopped at the uphole."
"This method makes the speed of the mine hoist in the process of use, high and low, and the change is great.
Once there is a hidden danger in electrical protection, it is easy to cause a large accident. ” Kong Dezhong finally said categorically: "Therefore, Mr.
Zhao, Minister Zhao, Xu Linlin and Chen Li, after discussion and discussion, unanimously decided that the electrical protection of our hoist needs to be redesigned and improved, otherwise, there will be endless troubles."
Regarding Kong Dezhong's words, Xu Linlin and Chen Li also acquiesced.
Seeing this scene, Zhao Guoyang cast an inquiring glance at Zhao Siyan and said, "Siyan, what do you think of this question raised by Dezhong's classmates?"
When Zhao Siyan heard this, she didn't hurry up and said: "I have also noticed this problem that classmate Kong Dezhong said. ” "However, whether the specific electrical protection has such a big impact on the use of the entire mine hoist, I think it is still necessary to consider one or two more."
After Zhao Siyan's statement, Zhao Guoyang probably understood what the situation was.
Obviously, it was Kong Dezhong who discovered the hidden problem of neglect after their on-site investigation.
But because Zhao Siyan didn't see it with her own eyes, it was difficult to make a decisive judgment just by listening to the theory.
After all, it takes a lot of courage to negate the electrical protection of an existing mine hoist.
As a result, Zhao Siyan's hesitation became distrustful of herself in the eyes of several students, which made Kong Dezhong and the others convinced Just now, a group of people were arguing about it, and there was obviously an element of anger in it.
Thinking about this, Zhao Guoyang did not directly intensify the contradiction, but looked at Kong Dezhong in a roundabout way and asked: "Classmate Dezhong, why isn't Ji Lao here, is he resting in the hotel?"
"No, no, no" Before Kong Dezhong could speak, Liu Yan over there chattered and said, "Ji Lao was invited to the University of Science and Technology of China in southern Anhui Province as a guest.
It seems that an academician Ma asked him to give a lecture to the students, and he could come back in two or three days."
After Liu Yan finished speaking, Zhao Guoyang immediately came to his senses.
Indeed, if you want to be one of the best names in the industry like Ji Chongxuan and Li Kejian, you really can't be idle for a moment.
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From time to time, some old friends invite me to various universities and enterprises to hold lectures.
Li Kejian is better because he has another official identity.
In contrast, Ji Chongxuan is much busier, and almost every year he is invited to attend a few or even a dozen lectures.
Thinking of this, Zhao Guoyang said "hmm" and said: "Well, the design work of our mine hoist has almost been completed, and Ji Lao's side is indeed easier." ” Turning his head and glancing at Kong Dezhong, Zhao Guoyang asked with a smile: "As for the question you just said, classmate Dezhong, I personally agree with it." ” "In the area of electrical protection, Dezhong, you, Chen Li and Xu Linlin are the most professional.
In this regard, there will certainly be nothing wrong. ” After Zhao Guoyang's words came out, Kong Dezhong's face added a bit of brilliance.
Indeed, in his heart, this young Mr.
Zhao and Researcher Zhao are almost as important as their own teachers.
Being recognized by him is undoubtedly a very glorious thing for me.
Just when Kong Dezhong was secretly happy, Zhao Guoyang opened his voice again: "Question, Dezhong, you have found out."
But how to solve this problem, Dezhong, you, Xu Linlin, and Chen Li, do you have a preliminary idea?"
After listening to Zhao Guoyang's question, Kong Dezhong and the three of you, you look at me, I look at you, they all look at each other.
Indeed, what they can do as undergraduates at the moment is probably to find problems.
It's still a bit difficult for them to come up with a solution to the problem.
After all, their theoretical basis is not comprehensive and detailed enough, and they have seen too little things.
Seeing the three of them bowing their heads, Zhao Guoyang touched his chin and said, "After just looking at this drawing that you have supplemented, I have some immature ideas."
Listening to Zhao Guoyang's humble words, Kong Dezhong sighed "Hi" and said: "Mr.
Zhao, don't be modest, your level, others don't know, don't we know, just give us a quick answer."
Chen Li also smiled lightly and said, "Yes, Mr.
Zhao."
We're really not able to solve this problem, and I'd love to hear your solution."
Xu Linlin, who has always been silent, although he still did not speak, but his eyes when he looked at Zhao Guoyang undoubtedly revealed a trace of expectation.
As for her friend Zhao Siyan, she looked at Zhao Guoyang with anticipation, hoping that he could help with this.
"In fact, the way to improve the electrical protection system of our mine hoist is very simple.
S speed limit protection, control the moving speed of the tank cage. ” "Another is to add the forward ZXK and reverse FXK of the upper wellhead detection switch on the hoist depth indicator, so as to set the wellhead monitoring area; In addition, an intermediate relay ZJ and a DC rate limiting relay are added. ” "When the tank cage enters the wellhead monitoring area at full speed, through the instantaneous closure of ZXK or FXK, the ZJ coil is energized and can be automatically protected."
"In its coil circuit, the primary signal relay XCJ is connected in series.
The speed limit protection can only be put into operation after entering the deceleration zone; The second is to reset the coil when it is powered off to achieve cycle control. ” Zhao Guoyang casually said two ideas, all of which are simple methods and easy to achieve.
Kong Dezhong and the others are all top students majoring in electrical engineering, so they naturally immediately discerned the feasibility of his proposals.
After a long while, Kong Dezhong, Chen Li, and Xu Linlin exchanged opinions and carefully estimated Zhao Guoyang's proposal, and then gave a convincing thumbs up: "Mr.
Zhao, I can be regarded as convinced of you."
You're so godly, you can solve the problem at your fingertips."
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