When the bricks and tiles were burned out, the housekeeper soon had new news, that was, there were copper smiths, and there were some other jewelry craftsmen, including those who used tin, silversmiths, and goldsmiths.

After careful inquiry, it turned out that it was a jewelry shop that had committed a crime. These craftsmen asked the official to sell it. They happened to be in contact with the official family and brought it back. Now, there is no shortage of gold, silver, copper and iron in the family.

"Little Langjun, what you said is easy to make, but what you said is that the switch is so small that it really cannot be made. What is that thread?" Yang Heng was a little surprised to play the piano again. The thread was not available at this time, and even the switch, so naturally there was no more.

"This is easy to solve. You can lead people to make pipes first. When you need it, I will lead you to make valve switches." As a time traveler in later generations, if you have not removed the valve of a gas stove, it is still called a time traveler. One of the key parts of this valve is sealing and the other is that it needs to be pressurized. Using brass as a spring may not be disabled. You can also make the valve in a fixed position and reinforce it underneath, and pressurize it with heavy objects. Can it also be used? That is, the torsion rod is longer and stronger.

As for brass, it is naturally a joint study between the tinsmith and the copper smith. As long as they find the right ratio, it is brass. The sealing can also be said to be tight. As a senior jeweller, this is a very simple thing to make the heart of the valve tighter with the shell. If they cannot do this, they will not make very high-end jewelry.

The copper pipe is solved and the valve is solved. The flame sprinkler, or even the anti-fire device, should be solved. There is also the copper pipe connection head, which naturally requires threads.

To prevent fireback, you only need to use the simplest self-pressure device. Use a small round bead and a simple copper spring. The pressure is not large. As long as you can resist the bead below, you will have three parts of force. One part is the suction force, one part is the gravity of the bead itself, and the other part is the pressure of the spring. The difficulty lies in the smoothness of the bead, the denseness and performance of the bead table below and the bead. Similarly, it can still be used in combination after hand-fine polishing.

Next is the thread. If the thread is a thread that makes iron, it may be difficult, but copper thread, it is simple. You only need to make some molding, sand turning, and pour back and forth a few times, and there will be a qualified cast iron wire cover and pig iron wire tapping. You only need to carefully apply vegetable oil and slowly make it. A few very qualified screws and nuts are made. However, the screws and nuts made in this way need to be polished before some twine can be wrapped on it to seal. This can be seen in the joints of tap water pipes in later generations. When there is no raw tape, twine is the best sealing material.

Yang Heng did not expect that a simple biogas tank had actually made a complex mechanical and metal project. Fortunately, after a period of public relations, all the materials were made, and even to make these things, they consumed more than ten or twenty kilograms of copper coins. If Li Er knew about this, he would not know if he would get angry. This copper coins were not enough, and you would have to waste it. But there is no need for copper coins, where to find copper? You must know that copper mines are either from the country or in the hands of some great nobles, or from copper coins.

This is really something that has been understood in both ancient and modern times, but it is just a problem of the ideological of some technicians. You must know that in the Tang Dynasty, some things were not something that people could think of. If they were thought of, some simple things, not some precision electronic equipment, and some fine metal formulas, and everything would be made into some prototypes. With the prototype, they could be processed more finely, right? Even in later generations, they were accumulated step by step.

"Nephew, should we officially build this pool next?" My uncle has been anxious these days. He couldn't help with these things. Naturally, he was anxious. But even though he was anxious, he learned some things. He was embarrassed to ask, but Xiaoniang and others were embarrassed to ask, "Brother Heng, why do we do this here?" Then, "Brother Heng, why do we do this here?" I don't know if they understood it or not. It was my uncle who understood it anyway.

"Well, now we are officially making a biogas pool. I want to make two, one is the secondary pool and the other is the main pool. The main pool is larger and the secondary pool is smaller. This is also for the purpose of using up the gas after the pool is used up, so it is easier to replace it."

In order to facilitate use and mainly to save copper money, Yang Heng designed the pool on the edge of the main house and the kitchen, and opened several doors on the wall to facilitate the cleaning of some feces and waste from the animal pen behind to throw them into the pool. He also built several toilets near the pool, which was naturally on the edge of the wall, but it had an impact on the overall layout of the courtyard. However, this was for the sake of experimentation. If successful, the overall courtyard might be improved.

"Go, my wife, let Feng Bo transport some mud from the pond." The pond can finally be put into use, but when it is used, some bacterial species are needed. Without bacterial species, it is difficult to produce biogas.

"Brother Heng, why do you need mud? Didn't you say you can vent your breath directly?" "This kind of grain requires seeds, and this kind of biogas also requires seeds." How can you explain it, you can only explain it like this.

"But, Brother Heng also needs seeds for other gases?" During this period, Yang Heng gave Xiao Niang an explanation of what gas is. "Others, that's not needed. Only this biogas is special and requires seeds." "Oh, I understand."

After getting the answer she needed, the little lady ran away. Not long after, Feng Bo pulled a carriage of mud. "Xiao Madam, what did you say, why do we need so much mud?" "I, I thought the more of this kind of seeds, the better. Otherwise, I will not let the carriages come back." "Hurry, let them throw the mud into the fields and don't send it here. I'll tell you what biogas seeds are."
Chapter completed!