When the bricks and tiles were burned, soon the steward also had new news, that there were coppersmiths, and there were some other jewellers, who had tin, silversmiths, and goldsmiths.

After careful inquiry, it turned out to be a jewelry shop because of a crime, these craftsmen let the official family sell it, just let the official family run into it, and brought it back, now it's good, the gold, silver, copper and iron at home are not lacking in processing.

"Xiao Langjun, the pipe you said is easy to do, but the switch you said is really small, and what is that thread." Yes, Yang Heng is playing the piano to the cow again, thread, there is no such thing at this time, it is a switch, so naturally there is no more.

"This is easy to solve, you first lead someone to make the pipeline, and when you need it, I will lead you to make valve switches." As a later generation of traversers, if there is no dismantling of the valve of the gas stove, it is also called a traverser, the key part of the valve is a seal, one is the need for spring to pressurize, the use of brass to make a spring may not be disabled, you can also make the valve into a fixed position in the lower reinforcement, the top with a heavy load, can also be used, that is, the torsion bar with a longer stronger.

And brass, that is naturally a tin smith and coppersmith two joint research, as long as you find the right proportion, is the brass, sealed, can also be said to be tight, as a senior jeweler, this is a very simple thing, let the heart of the valve, and the shell tight, if they can't do this kind of thing, then it will not make very high-end jewelry.

The copper pipe is solved, the valve is solved, and the next step should be to solve the flame sprinkler, or even the anti-flashback device, and the copper pipe connector, which naturally needs to be threaded.

Anti-tempering, which only needs to use the simplest self-pressure device to become, with a small ball, plus a simple copper spring, the pressure is not large, as long as it can withstand the ball below, so that there will be three parts of the force, part is the force of the suction, part of the gravity of the ball itself, the other part is the pressure of the spring, and the difficulty lies in the smoothness of the ball, the density of the ball table and the ball below, the same, after manual fine grinding, it can still be used.

The next is the thread, if the thread is to make the iron thread may be difficult, but the copper thread, it is simple, only need some steps to make a mold, turn the sand, back and forth a few times, there will be a qualified pig iron wire sleeve, and the pig iron wire tapping, only need to be very careful with vegetable oil, slowly do, a few very qualified screws, nuts will be made, but the screws and nuts made in this way need to be polished, before some twine can be wound on them to seal, This can be seen in the joints of water pipes in later generations, when there is no raw material belt, twine is the best sealing material.

Yang Heng didn't expect that just a simple biogas digester would make a complex mechanical and metal project, fortunately, after a period of public relations, all the materials were made, and even in order to make these things, more than ten or twenty catties of copper coins were consumed, if Li Erzhi said, I don't know if he would get angry, this copper money is not enough, you have to waste it, but you don't need copper money, where to find copper, you must know that the copper mine is either state, or in the hands of some big nobles, It's still simple to use copper coins.

This is really a craft both ancient and modern are figured out, is the ideological problem of some technicians, to know that in the era of the Tang Dynasty, some things are not people can come up with, if you come up with something, some simple things, not to say some sophisticated electronic equipment, and some fine metal formulas, everything will make some prototypes, with the prototype, can be more refined processing, that is, later generations, that is also accumulated step by step.

"Nephew, shouldn't we officially do this pool next?" Uncle is also in a hurry these days, Yang Heng is doing these things, he can't help him, so he is naturally anxious, but he is in a hurry, he still learned some things, he is embarrassed to ask, but Xiao Niang and others are embarrassed to ask, for a while, "Brother Heng, why do you want to do this here?" "I don't know if they understood, anyway, the uncle understood.

"Well, now we are officially making the pool of the biogas digester, I want to make two, one is the secondary pool, the other is the main pool, the main pool is larger, and the secondary pool is smaller, which is also so that when the pool runs out of gas, it will be easier to replace."

In order to be easy to use, mainly to save copper money, Yang Heng designed the pool on the side of the main house and the kitchen, and opened a few doors on the wall to facilitate the cleaning of some manure from the back of the corral, as well as forage waste to throw into the pool, and also built a few toilets near the pool, naturally on the edge of the wall, but it has an impact on the overall layout of this courtyard, but this is to test it, if it is successful, maybe the overall courtyard will be improved.

"Go, little lady, let Feng Bo bring some mud from the mud pond." The pond is finally ready for use, but when it is used, some strains are needed, and without strains it is difficult to produce biogas.

"Brother Heng, why do you want mud, didn't you say that you can get angry directly?" "This grain needs seeds, and this biogas also needs seeds." How to explain it, it can only be explained in this way.

"But, Brother Heng also needs seeds for other gases." During this time, Yang Heng gave Xiao Niang a good explanation of what gas is. "Anything else, that's not needed, only this biogas is special and needs seeds." "Oh, I see."

After getting the answer she needed, the little lady ran away, and it wasn't long before Font came with a wagon of mud. "Little lady, what did you say, how could we need so much mud." "I, I thought the more of this, the better, or I would have asked the cars behind me not to come." "Hurry up, let them throw the mud into the field to fertilize the field, don't send it here, I'm going to tell you what biogas seeds are."

It's the sludge from Fontera, Yang Heng only selected a little, there are some biogas-making bacteria in these sludge, only a very small amount of sludge, they will make these two pools quickly multiply more bacteria, besides, if it's all sludge, then where to throw other things?