When Yanagisawa Hui returned to the county office, the first thing he did was to wave his hand and send out a document: "Re-select a site in another wider area of Dafengtai, on the seaside. Build a new brick building for the Kyushu Institute of Physics. "
For the first time, Yanagisawa made this decision with trembling hands. He turned around and asked the master: "Do you think one thousand square meters of land is enough?"
The master frowned and said, "Probably, three to five thousand is enough?"
"Then how about granting them the entire beach east of Gale Tower?"
"I think it will work."
“…”
With a wave of his hand, another document was issued.
Then he turned around and asked, "Do you think they need any funding?"
"It's definitely needed. One thing you may not know is that they don't have the money to do these experiments."
Yanagisawa asked: "No money?"
"Yes, they originally planned to conduct five experiments. But the local villagers' voluntary donations helped them raise more than two thousand coins."
Yanagisawa asked in shock: "Their money was donated by the surrounding people? There are all fishermen near Dafengtai. How much money do the fishermen have? Will they be willing to donate to them?"
The master sighed: "That's why I suggest you go and see it with your own eyes today. They scrimped on food and clothing at first and pooled their own money to do this research. In the end, I don't know who came up with an idea in the city. They held a fund-raising activity. But the effect was not good. In the end, all the villagers near Dafengtai knew about it, and they all came to see them conduct experiments and research. The next day, many people donated to them. And now, there are still villagers nearby every day Donate to them.”
Yanagisawa's eyes widened with a look of disbelief: "It's actually a charity donation? Is this why they don't close the door for experiments?"
"Yes, Li Zhen, the dean of the Kyushu Institute of Physics, also invited nearby villagers to come in and watch them do experiments and watch them do science. But the nearby villagers were very conscious and stood outside the door to watch, not daring to go in and disturb them. . In the end, Li Zhen directly said that the Kyushu Institute of Physics would never close its doors."
Yanagisawa took a deep breath and said: "It's like this..."
“…”
The next day, Kyushu Institute of Physics.
Li Zhen made the final modifications to the master drawing, gathered everyone's opinions, and installed an exhaust valve on the cylinder.
"The exhaust valve can be manually deflated according to the pressure critical point. For greater safety, we need to install double exhaust valves on the boiler. The boiler exhaust valve is an automatic exhaust type. Do you have any opinions?"
Li Zhen pointed at the structure on the drawing and looked around.
Ruan Mingxue raised his hand and asked: "It is feasible to install a manual exhaust valve on the cylinder. As for the automatic exhaust valve on the boiler, I still have some doubts."
Li Zhen chuckled and said, "Ming Xue, if you have any questions, just ask them."
"That's right. According to our design, the double pressure reducing valve on this boiler is linked to the pressure gauge. When the safe value pressure is 60, the exhaust pressure should be reduced, and the automatic pressure reducing valve, when the pressure value reaches the critical value of 70 When pressed, the pressure gauge makes a clear sound as the auxiliary pointer hits the copper bell, and the internal steel wire automatically opens the valve for exhaust under the dual action of spring and pressure.
However, it all depends on the pressure gauge. What if the pressure gauge breaks? After the pressure exceeds the limit, wouldn't it be possible for dangerous accidents to occur if people don't know? "
Li Zhen nodded: "The suggestion put forward by Mingxue is very useful. If so, what about setting up a secondary pressure gauge on the outer wall of the boiler? There are two pressure detection instruments on a steam engine, one is linked to the automatic exhaust, and the other is not connected to any Everything is linked to reduce wear and consumption, and only intuitive data is given. In this way, safety is also double guaranteed."
Ruan Mingxue nodded: "In this case, although it is a little troublesome, it is also practical."
Li Zhen laughed loudly: "There is still a long way to go. We still need to study how to automatically reduce pressure and exhaust, and how to always stabilize the pressure at an equilibrium value. There will always be a way, take your time, then... let's start building it. ?This time, it’s the first generation steam engine.”
"It's the second generation!"
"Haha, the first generation has exploded."
"Yes, the second generation steam engine."
“…”
The blacksmiths in the city also came to Jiuzhou Institute of Physics voluntarily. They felt that they were very important. Although they worked here voluntarily, they felt that they were very glorious.
Of course, Li Zhen will still pay for the materials himself, and will still pay them a certain amount of wages.
Blacksmith Master Wang saw the new drawings and said excitedly: "It's different from the previous ones? Have you studied it?"
Li Zhen said with a smile: "Yes. This second generation steam engine has been researched and is waiting for you to build it and test it immediately. Master Wang, do you think it is difficult? Are there any problems that cannot be overcome?"
Master Wang looked at the drawing for a long time and raised his head in embarrassment: "Does this boiler need to have three spiral openings?"
"right."
"It's easy to open three openings, but the spiral pattern is difficult."
"Master Wang, after so many tests, the test result is that only the spiral pattern mouth can be durable and tight. If it is a snap-type mouth, it will be easily collapsed by the air inside."
Master Wang nodded: "I have a suggestion, I don't know whether I should say it or not."
Li Zhen said quickly: "Please tell me."
"The spiral buckle is a kind of thing that uses the oblique section to link two objects together step by step. However, this is actually very difficult to make. I have never heard of this form before, if it weren't for Li Master, you told me about the principles of screws and nuts, but I didn’t understand it. This is something I figured out by myself. It’s really difficult to make it by hand.”
Master Wang pursed his lips and said: "So, this spiral buckle cannot be mass-produced, right? Although these boilers are simple, and boilers and other things can be mass-produced, this small spiral buckle is... But it just can’t be put into mass production…”
Li Zhen was stunned and turned to look at Liu Jinghong.
The two of them suddenly woke up and forgot the most important thing!
Why restore steam engines? Isn't its main purpose to promote the steam age to the entire Kyushu? But it cannot be mass-produced, which is destined to be difficult, so how can it be promoted? When it was extended to Kyushu, it actually got stuck because of the manufacturing process of a small screw and nut.
Li Zhen was silent for a long time, muttering speechlessly.
Master Wang sneered: "I don't know if what I said is right or wrong. But I have a suggestion. Can you change the buckle that blocks the opening? Mortise and tenon joints can actually achieve this effect."
Li Zhen smiled bitterly and shook his head: "No. The mortise and tenon joint has a snap-on structure. If it is stuck deep enough, it can indeed get stuck. But it is not easy to take it out."
Master Wang slapped his thigh: "Master Li, what era are you using the mortise and tenon joint from? The mortise and tenon joint I'm talking about is a quincunx-shaped mortise and tenon joint. It's the mortise and tenon joint used in large projects."
"Oh? Pentagonal mortise and tenon joint?"
"Yes, a cylinder is hollowed out. Five pillars are used to hold it out. The inside of the pillar is extended by a spring. The spring keeps the five pillars stretched out. There is a pull wire on the outside. When the wire is pulled, the spring inside tightens. The five pillars holding up the outside of the column will retract.”
Li Zhen slapped his thigh and exclaimed: "Is there such a mortise and tenon joint?"
"...This has been invented for hundreds of years, and it's been worn out. Why don't you know?"
Li Zhen turned his head and looked at the surprised students from the Kyushu Institute of Physics. Everyone looked at each other speechlessly, and after a moment, laughed.
(End of chapter)