Rising: Ten Thousand Years Chapter 83: ：mortise and tenon

When Liu Zehui returned to the county office, the first thing he did was to wave his hand and issue a document: "In another wider area of ​​Dafengtai, by the sea, re-select the site. Rebuild a brick building for Kyushu Institute of Physics Tile-roofed house.”

For the first time, Liu Zehui made this decision with trembling hands, and then turned around and asked the master: "Do you think a thousand square meters of land is enough?"

The master frowned and said, "Probably, three to five thousand will do?"

"Then how about granting them all the positive beaches east of Dafengtai?"

"I think it will work."

“…”

With a wave of his hand, another document was issued.

Turning back and asking: "Do you think they need funds?"

"Definitely. You may not know one thing, they just don't have the money to do these experiments."

Liu Zehui questioned: "No money?"

"Yes, they originally planned to do five experiments. But the local villagers donated voluntarily and helped them raise more than 2,000 coins."

Liu Zehui asked in surprise: "Their money was donated by the surrounding people? There are fishermen all around Dafengtai. How much money do fishermen have? Will they be willing to donate to them?"

The master sighed: "That's why I suggest you go and see for yourself today. They cut down on food and clothing at first, pooling their own money to do this research. In the end, someone came up with an idea, Organized fundraising activities in the city. But the effect was not good. In the end, the villagers near Dafengtai knew about it, and they all went to watch them conduct experiments and research. The next day, many people donated to them. And there are still The nearby villagers donated to them."

Liu Zehui's eyes widened, with a look full of disbelief: "It's a charity donation? Could this be the reason why they don't close the door to conduct experiments?"

"Yes, Li Zhen, the dean of the Kyushu Institute of Physics, even invited the nearby villagers to come in to watch them do experiments and watch them engage in science. But the nearby villagers are very conscious, so they just stand outside the door and watch. Dare to go in and disturb. In the end, Li Zhen directly said that Kyushu Institute of Physics will never close."

Liu Zehui took a deep breath of air-conditioning, and said, "It turned out to be like this..."

“…”

The next day, Kyushu Institute of Physics.

Li Zhen made the final revision on the general drawing, gathered everyone's opinions, and installed the exhaust valve on the cylinder.

"The exhaust valve can be manually vented according to the critical point of pressure. In order to be more safe, we also need to set up a double exhaust valve on the boiler. The boiler exhaust valve is an automatic exhaust type. Everyone has opinions Is it?"

Li Chen pointed to the structure on the drawing and looked around.

Ruan Mingxue raised his hand to ask questions: "It is feasible to install a manual exhaust valve on the cylinder. I still have some doubts about the automatic exhaust valve on the boiler."

Li Zhen laughed and said: "Mingxue, if you have any questions, just ask."

"It is like this. According to our design, the double pressure reducing valve on this boiler is linked to the pressure gauge. If the safety value is 60, the exhaust pressure should be reduced, and the automatic pressure reducing valve, when the pressure value When it reaches the critical point of 70, the pressure gauge emits a clear sound of the auxiliary pointer hitting the copper bell, and the internal steel wire automatically opens the valve to exhaust under the dual action of spring and pressure.

However, all of this has to be linked to the pressure gauge. What if the pressure gauge is broken? After the pressure exceeds the limit, people don't know, wouldn't dangerous accidents happen? "

Li Zhen nodded: "The suggestion put forward by Mingxue is very useful. If so, how about we install an auxiliary pressure gauge on the outer wall of the boiler? Two pressure detection instruments are installed on a steam engine, one is connected to the automatic exhaust, and the other It is not linked to anything, reduces the degree of wear and consumption, and only gives intuitive data. In this way, safety is also double guaranteed.”

Ruan Mingxue nodded: "In this case, although the trouble is a bit 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 decompress 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? 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."

“…”

Those blacksmiths in the city also volunteered to come to the Kyushu Institute of Physics. They felt that they were very important. Although they worked here voluntarily, they felt that they were very honorable.

Of course, Li Zhen will still pay for the materials himself, and will still pay them a certain amount of wages.

The blacksmith Master Wang saw the new blueprint and excitedly said, "It's different from the previous one? Have you researched it?"

Li Zhen smiled and said: "Yes. This second-generation steam engine has been researched, and it will be tested immediately after you build it. Master Wang, do you think it is difficult? Is there any problem that cannot be overcome? Is it?"

Master Wang looked at the blueprint for a long time, and nodded his head in embarrassment: "On this boiler, do you want to open three spiral holes?"

"Yes."

"It's easy to open three openings, but it's not easy to make spiral patterns."

"Master Wang, after so many tests, the result of the test is that only the mouth with spiral pattern can be durable and firm. If it is a buckle-shaped mouth, it is easy to be collapsed by the air inside."

Master Wang nodded: "I have a suggestion, I don't know if I should say it."

Li Zhen hurriedly said: "Please tell me."

"The buckle of the spiral pattern is a step-by-step thing that uses the oblique section to link two objects together. However, this is actually very difficult to get out. I have never heard of this form before. If it wasn't for Mr. Li, you told me the principle of screws and nuts, I wouldn't even understand them. I figured it out by myself. It's really difficult to make it by hand."

Master Wang pursed his lips and said: "So, this spiral buckle can't be mass-produced, right? Although these boilers are simple ~IndoMTL.com~ boilers can be mass-produced, but this It just can't be mass-produced with a small spiral pattern..."

Li Zhen was stunned for a moment, then turned his head and looked at Liu Jinghong.

The two of them woke up instantly and forgot the most important thing!

Why restore the steam engine? Isn't its main purpose to spread the age of steam to the entire Kyushu? But it cannot be mass-produced, which is doomed to be difficult, so how can it be promoted? When it was promoted to Kyushu, it got stuck because of a small screw and nut manufacturing process.

Li Zhen was silent for a long time, and he was speechless.

Master Wang sneered: "I don't know whether what I said is right or wrong. But I have a suggestion, can I change it to a buckle that blocks the opening? Mortise and tenon joints can actually achieve this effect."

Li Zhen smiled wryly and shook his head: "No. The mortise and tenon structure is a snap-on structure. If the card is deep enough, it can indeed be stuck. But it is not easy to take it out."

Master Wang slapped his thigh: "Master Li, what era is your mortise and tenon? The tenon and tenon I am talking about is a five-pointed plum-shaped tenon and tenon. It is a tenon and tenon used in large-scale projects."

"Oh? Pentagonal quincunx tenon and tenon?"

"Yes, a cylinder is hollowed out. It is supported by five pillars, and the interior of the pillars is extended by springs. The springs keep the five pillars in the shape of being propped out. There are pull wires on the outside. Once the wires are pulled, the springs inside will be retracted. If it is tight, the five pillars supporting the outside of the cylinder will be retracted."

Li Zhen slapped his thigh and exclaimed: "Is there such a tenon and tenon?"

"...It's been invented for hundreds of years, why don't you know that it's all worn out?"

Li Zhen turned his head and looked at the surprised students of Kyushu Institute of Physics.