Countercurrent 1982

Chapter 412
"Uh." Duan Yun heard this and looked through the window, then let go of Cheng Qingyan's hand, started the car, and left quickly.

Duan Yun has always wanted to have a fiery relationship with Cheng Qingyan, but there are too few entertainment items for young people in this era, and now it is in a critical period of collective technology improvement, Duan Yun is also very helpless.

Duan Yun can also tell that Cheng Qingyan is a girl with no experience in love, so she is naturally full of fantasies about this relationship. From the bottom of her heart, Duan Yun doesn't want to disappoint her, but right now, the two of them can only go together at night Only when I work at night can I have the opportunity to be alone.

The car drove all the way, and after more than ten minutes, it arrived at the correspondence station.

For Duan Yun and Cheng Qingyan, walking on the road to night school, this time became very precious.

There was no one to be seen on the small road on campus, and the two held hands lightly.

It's just that when Duan Yun wanted to pull Cheng Qingyan to the side of the small tree with no one on the side of the road to take the next step of "heartbeat", a car bell rang behind him, and two or three students from the class had already come over on bicycles, talking and laughing.

Cheng Qingyan immediately threw away Duan Yun's hand, even though Duan Yun and Cheng Qingyan were the youngest in the class, the older students in the class had already regarded them as a couple, but Cheng Qingyan was thin-skinned, she was still embarrassed She was too close to Duan Yun in front of her classmates.

This made Duan Yun very helpless. The two of them didn't have much time to be alone. They had to be busy at work during the day, and their classmates were still there in class at night. Trying to do some "little tricks" would be like a thief. This can't help Duan Yun Cloud depressed.

"There is no class tomorrow night, you can come to me..." Cheng Qingyan said softly to Duan Yun, as if seeing that Duan Yun was disappointed.

"Okay!" Duan Yun's face immediately became happy when he heard the words.

For Duan Yun, as long as Cheng Qingyan gives him time and opportunity, other things will be easier to talk about.

One night is enough for Duan Yun to do many things...

Although the two of them were excited, they were still very focused and serious after entering the classroom.

Especially Cheng Qingyan, during class, she kept taking notes, wishing to record every word the teacher said.

After class in the evening, Duan Yun drove Cheng Qingyan all the way to the door of the house.

"I'll come to see you tomorrow night." Duan Yun said to Cheng Qingyan after sending her downstairs.

"Well, goodbye!" Cheng Qingyan waved Duan Yun lightly, then walked into the corridor.

After watching Cheng Qingyan go upstairs, Duan Yun took out a cigarette and lit it, then drove away reluctantly...

……

When Duan Yun came to the company the next day, he plunged into the workshop.

For Duan Yun, today is destined to be a busy day. After Qian Deqiang's second-hand equipment is in place, Duan Yun can refit the preheating furnace.

The structure of the industrial preheating furnace is not too complicated, mainly composed of industrial furnace masonry, industrial furnace smoke exhaust system, industrial furnace preheater, optimized energy-saving industrial furnace driving device and industrial furnace combustion device.

Among them, the industrial furnace body includes frame support structure, furnace structure, material conveying system, etc.

Heat supply system, including equipment systems that provide heat sources for materials in industrial furnaces, such as energy medium pipelines and equipment systems, power transmission system transformer equipment, etc.

In addition, the smoke exhaust system includes flue, chimney, heat exchanger and smoke exhaust auxiliary equipment, etc.

The last thing left is other supporting equipment.

The furnace body of the heat treatment quenching furnace is welded by section steel and steel plate. The inner wall of the furnace lining is connected with the furnace shell by stainless steel plate to form a whole. The furnace body and the interlayer of the furnace are filled with aluminum silicate refractory fiber for heat insulation.

The furnace door of the heat treatment quenching furnace is designed at the lower part of the furnace body, that is to say, the entry and exit of the workpiece is from below.The lower opening of the furnace body is opened, and the opening and closing of the furnace door adopts a mechanical transmission method, which is completed through a motor, a reduction box, a sprocket, a chain, and a track.

The heating element adopts the resistance band of high-resistance alloy, which is arranged on both sides of the inner tank through special hooks, and is insulated from the inner tank.

The ventilator is composed of a blower and an air deflector. The blower motor and the heating element are electrically interlocked. Only when the blower is turned on, the heating element can be energized, which can ensure that the heating element can work under the condition of ventilation circulation.

The loading basket and the loading and unloading trolley are welded by section steel, and the center of gravity is adjusted horizontally and lifted up and down.The electric furnace is equipped with material baskets and material trucks to ensure that users can work in time.When feeding, the material basket is installed on the trolley, pulled out and pushed forward, when entering the lower part of the furnace body, the furnace door is opened and the hoist works, the chain is hooked, the charging basket is hoisted into the furnace, and the furnace door is closed to stop heating.When unloading, open the furnace door, move the hoist, put the charging basket into the pool for quenching treatment, then lift the basket out of the water and place it on the plane of the trolley, unhook the chain, lift the hoist, and pull the trolley out. Stop statute of limitations.

There is a water pool at the lower part of the furnace body, so that the workpiece can enter the water pool in a short time for quenching treatment.

Duan Yun had already drawn up the design drawings for the modification of the furnace body before, and some of the modifications used some patented technologies of later generations.

The entire modification plan probably takes about five or six days, but Duan Yun wants to lead his research team to complete it within three days.

Duan Yun's first step was to replace the small fan of the previous heating furnace with the repaired high-power fan of the power plant. This modification is the simplest and most direct.

Next, Duan Yun began to modify the temperature control instrument of the furnace.

To replace the outdated heating furnace temperature control device, Duan Yun directly replaced it with a relatively advanced controller with an electronic potentiometer and an AC contactor replaced from a power plant.

This kind of element adopts electron tube and semiconductor array elements, which has a simple structure and low cost, and the temperature control accuracy is lower than ±10°C, which is higher than the previous furnace in terms of temperature control accuracy.

Working overtime at noon, Duan Yun asked the cafeteria to fry two pots of meat and vegetables and sent them to the workshop, and continued to study the modification steps in the afternoon with the workers in the control room.

The current situation is that the equipment modification is completed one day earlier, and the finished product can be produced one day earlier. At present, the labor service company basically has no orders, and the human resources are too idle. Duan Yun must resume production in the workshop as soon as possible.

At around three o'clock in the afternoon, just as Duan Yun was arranging for workers to refill the furnace wall with aluminum silicate refractory fiber, Qin Shengli trotted all the way to the workshop.

"Manager Duan, a car came to the gate of the factory, said to be a delivery from the diesel engine factory..." Qin Shengli said after coming to Duan Yun.

"Diesel engine factory?" Duan Yun was stunned for a moment when he heard the words, and then showed excitement. He waved his hand and said to Qin Shengli, "Hurry over."

Afterwards, Duan Yun and Qin Shengli walked quickly to the gate of the factory.

"Hello, comrade, I am Duan Yun, the manager of the factory. Excuse me, what is being pulled by this truck..." Duan Yun stepped forward and asked the truck driver.

"This is a product sample sent to you by our factory. Please sign for it, Manager Duan." After the truck driver handed a sheet to Duan Yun, he turned around and opened the truck's fender. There were two wooden boxes on it. Half of the gearbox casing with a metallic luster is exposed outside.

(End of this chapter)