Bright Sword: Starting from the Improved Grenade

For the next period of time, Zhao Tianyang first assigned the sent workers to various factories and asked them to train the new employees well.

Then they began to research new steel-making furnaces, because the ore was delivered in a steady stream and the existing earthen blast furnaces could no longer keep up with their production.

Steelmaking furnaces are generally divided into converter steelmaking, open-hearth steelmaking, and electric furnace steelmaking. Considering the cost and manufacturing difficulty, Zhao Tianyang decided to directly manufacture a converter for steelmaking.

If you want to use a converter to make steel, you must first build a large blast furnace to make iron.

In principle, it is similar to an earthen blast furnace, the difference being that the blast furnace is more standardized and uses more automatic tools.

The blast furnace is divided into nine sections.

A blast furnace, the furnace shell is welded from steel plates and is used to fix the cooling equipment, ensure the firmness of the blast furnace brick body, seal the furnace body, withstand thermal stress, and internal gas pressure.

The second furnace throat is the uppermost part of the blast furnace. It is cylindrical in shape and serves as both the inlet for charge and the outlet for gas.

The three furnace bodies are in the shape of a frustum of cones, gradually expanding from top to bottom, so that when the charge encounters hot air and expands in volume, it will not form an arch and accumulate here.

The fourth is the furnace waist, the part with the largest diameter of the blast furnace. It allows a reasonable transition between the furnace body and the furnace belly, and some of the initial slag will also be formed here.

5. The bosh, the main area of ​​blast furnace melting and slag making, is in the shape of an inverted cone. In order to adapt to the volume shrinkage of the charge after melting, its diameter gradually decreases from top to bottom.

The six hearths, the fuel combustion area of ​​the blast furnace, are cylindrical in shape.

The furnace bottom bears the pressure generated by the entire blast furnace and generally uses water cooling or air cooling to improve the pressure.

The eight furnace bases are the foundation.

Nine: Furnace lining, which is the internal refractory material, such as refractory bricks.

Compared with the slightly more complicated blast furnace, the manufacturing of the converter is much simpler.

All that is needed is a large rotating converter (made of steel plates and refractory bricks) and an oxygen lance that can blow oxygen.

In order to manufacture blast furnaces and converters, Zhao Tianyang first spent a week in seclusion drawing blueprints.

Then he gave the drawings of the blast furnace and converter to Li Tie and Chang San, and asked them to be responsible for their manufacturing.

He himself is responsible for the research and development and manufacturing of the oxygen blowing gun.

The principle of the oxygen blowing gun is relatively simple. The gun body is made of a three-layer seamless steel pipe set. The cooling water inlet and outlet channels are between the central tube and the middle tube, and the oxygen channel is in the middle.

The nozzle is a Laval nozzle.

As for oxygen, Zhao Tianyang decided to use the simplest method, which was to use electricity to drive the blades and directly draw air into the oxygen blowing gun.

Although the effect is not very good, it can be used barely. When there is more time later, we can manufacture a compressor to extract pure oxygen.

When people are busy, time passes quickly. One day, when Zhao Tianyang was installing the blades of the suction fan, a worker found him.

"Section Chief, Director Shen Hong is looking for you and said that the light and heavy machine guns have been manufactured."

"Great, where is the person?"

Zhao Tianyang asked the workers impatiently.

"In the back hill, where we tested the small artillery last time!"

The worker replied.

"let's go!"

Zhao Tianyang put down the tools in his hands and followed the workers out of the tent and walked towards the back mountain.

..............

"Chief, you're here!"

Liu Guifu greeted Zhao Tianyang from a distance: "Hurry up, I'll be waiting for you!"

Wow! Zhao Tianyang walked closer and saw that Liu Ding, Shen Hong, Yu Xiaping and others were all there.

"Why, are you all here to watch the fun?"

Zhao Tianyang asked with a squint.

"Haha, Section Chief, this is a light and heavy machine gun!"

Liu Guifu scratched his head: "If we don't come and see this thing for the first time, I'll be itching to try it out!"

"Fine!"

Zhao Tianyang nodded, walked up to Shen Hong and asked, "Did you fire the gun?"

"I'm waiting for you yet!"

Shen Hong shook his head.

"What are you waiting for? Get out of the way!"

Zhao Tianyang waved his hand, signaling everyone to step back and let the gun inspector come forward to test the gun.

Soon a lame worker came over, picked up the light machine gun on the long table, and examined it carefully.

He unfolded the front bracket, lay on the ground, aimed at a scarecrow that had been prepared two hundred meters ahead, and pulled the trigger.

The sound of "Da da da..." was heard, and orange-red flames continued to emerge from the muzzle of the light machine gun.

It can be seen that except for the initial discomfort, which caused the gun inspector to miss the target, all the subsequent machine guns hit the scarecrow.

The scarecrow, which was not very strong to begin with, was broken into pieces.

After the scarecrow was smashed, the gun inspector did not stop and fired at the scarecrows at 300 meters, 400 meters, 600 meters and other positions.

"Ka ka ka..."

After a while, the gun inspector stopped pulling the trigger after hearing a blank sound from the light machine gun.

Seeing this, Zhao Tianyang and others hurried forward, checked, and asked questions.

"how do you feel?"

Zhao Tianyang asked expectantly.

“It feels great!”

The gun inspector's face flushed with excitement: "Chief, this light machine gun is so easy to use. After the bracket is deployed, I can hardly feel any recoil."

"Based on my experience, even if you charge with a light machine gun, the recoil is well within the tolerable range."

"And the shooting is very stable. Whether it's 300 meters, 600 meters or 800 meters, you can't feel the trajectory drifting at all."

"But this gun becomes a little hard to control after it exceeds 800 meters!"

"Ah, very good!"

Zhao Tianyang nodded in satisfaction, looked at Shen Hong who had finished the examination and asked, "Do you have any specific data now?"

"Have it!"

Shen Hong took out a light machine gun and introduced it: "The appearance of this light machine gun we copied is almost the same as the Soviet DP-28 light machine gun."

"The whole gun weighs a little over 18 pounds, is 1272 mm long, has a caliber of 7.92, a theoretical rate of fire of 500 to 600 rounds per minute, a combat rate of fire of 80 rounds per minute, an effective range of 800 meters, and a magazine capacity of 47 rounds."

"Except for a slight difference in weight and length, the data is no different from the DP-28 light machine gun."

Zhao Tianyang took the light machine gun from Shen Hong and took aim at it twice: "That's it, we can finalize it, and call it Taihang Type 1 Light Machine Gun."

"Great, it worked!"

Upon hearing this, everyone present immediately clapped their hands happily.