Although a boiler has been successfully manufactured, and even a pressure gauge has been made, this can only be regarded as a semi-finished product, and these things must be combined to be truly a qualified product.

The pressure gauge is a component made of brass, it has a long neck, and a big head, but this neck is combined with the boiler, how to combine it, naturally need to use a thread to combine, but this thread is quite difficult to make, the neck of the pressure gauge, in order to be strong, Yang Heng is still made relatively thick, this, how to say, he is not a mathematician, some precise calculations can not be calculated, so, some force bearing, can be as large as possible, it is better.

However, a few years ago, there was a thread, the basis of tapping, and now it is not much trouble to make, but the materials to be used are high-end, mainly the tapping on the boiler, however, this is also very simple, in the mountains have long studied a lot of steel secret recipes, as long as the furnace is made out of a kind of become.

"Boss, what are you?" "You see, this is threading, and temporarily our lathe skills are not yet successful, so we must use threading to make threads."

"Oh, I see, boss, this external thread is called thread, but what about the internal thread?" "The internal thread is called tapping, you are now looking at this thread, you see, because our tools are not particularly good, so we have to carry out many times of threading, first coarse threading, then middle sleeve, and then fine threading, and every time the thread, they must be lubricated with lubricating oil, and then this yarn is easy to be successfully nested."

Now, Yang Heng makes every thing. I'll bring a few workers with me. He just does everything once. If you don't succeed, you can continue to do it, and once you succeed, then okay, you've all recorded it, just do it like this, I don't care how many times you succeed, but you have to make it successful. And this is also the benefit of his night school, since he opened a night school, it has not stopped, first of all, the old farmers in the mountains, some blacksmiths, and some other personnel, all must learn to record, naturally those old ways are relatively simple, they are literate, and Yang Heng is looking for these old farmers. Blacksmith, then illiterate. But they are all ingenious people, once they are given the opportunity, they will also soar, no, the group of blacksmiths who make boilers are even successful in the second boiler.

How can I say that even if it is successful, the first boiler is an explosion, and the second boiler, the first pressure section is a successful test, but the second pressure section is to tear the joint, so even if it is successful, Yang Heng can't imagine the speed, originally, his plan is that they will at least test more than ten tests to succeed.

"Boss, what are you?" It can't be said that these people were surprised, Yang Heng actually used a few torch heads of biogas to burn the boiler, and it was at a point, and soon, one place of the boiler turned red, and then Yang Heng used a punch to quickly punch out a hole in the red-burning place, so that the hole that rushed out was a very deep wall, and in the same way, he punched out such holes in several other places.

"Hehe, do you think that this boiler has no water inlet, no steam outlet hole, and even a place to install a pressure gauge, it is a qualified product? Just look at it," After the boiler cooled down a little, Yang Heng quickly used a wire tap to thread these holes. Why do you want to do it while it's hot?

Naturally, the workers who followed the side also asked, "This is hot, just so that this place can be more compact than the previous external thread that is combined with it after it is cold and shrinking, and you think this is a success, no, it needs to be quenched again, and then it is still tested, after such a big operation, if it is not tested, what if there is an accident." ”

What Yang Heng needs is to test, test, and test, if he doesn't test, he won't rest assured, and after the test, check again, without any problems, it can be put into use.

Similarly, after the last explosion of that house, Yang Heng asked people to thicken it again, no, it was directly demolished and rebuilt as a thickened test stone house.

Moreover, this place will be built in the future, one is used to test the boiler of the stone house, the other is used to test some pipes of the stone house, naturally it is also to test the durability of the boiler, that is, the boiler is placed in the inside, once the pipe is made, it can be connected to the boiler for pressure test, one is to test the pipe, and the other is that the boiler has also been tested twice, three times or even many times to see how durable it is.

Oops, excited, after a few months, the boiler is fully qualified and has entered the practical stage, and at this time there are already several spare boilers, all of which are pressure gauges, all kinds of pipes are complete, and even the valves are the kind of valves in Yang Heng's previous life, and there is no need to use a big stone or heavy object to pressurize it, because it has already manufactured qualified springs and some sealing rings.

After having these valves, Yang Heng first did nothing else, but replaced the valves on the biogas pipeline at home, so that after that, it would not take a lot of effort to open and close a valve, however, the switch valve also has some new rules, that is, there is a sign in front of the valve, and there will be a message on the brand, such as, today I will close the valve, to carry out pipeline maintenance, Zhenguan ten years of a certain month and a certain day, Yang Heng.

In this case, if the next person wants to open the valve, the first thing he has to do is to ask Yang Heng if he can open the valve. "Well, you can open it, I just wanted to open it, and then change the message on the sign, yes, yes, you obeyed it very well." What is good, are you forgetting it, but this kind of dangerous thing, this brand is quite important, once you find that there is no brand, then you can't move, you have to find the relevant people to check the entire pipeline first, and then operate, but also to make up a new record card, and even the flow direction of each valve will be written very clearly, and even on the side of this valve there is an ugly building, that is, a small platform, on the platform is directly depicted on the flow direction, just to prevent accidents, You must know that the Taoist family business is big, once someone does something, and another person doesn't pay attention, it is easy to have things, just like the electricity in Yang Heng's previous life, it is often homework, pull the wrong gate, and go on the right pole, as a result, people are burned on it, water, fire, electricity, these are some dangerous things, so it is necessary to be vigilant at all times, in this way, although it is troublesome, it will be safer, isn't it, since Yang Heng installed biogas on each family, there are really a few accidents, Although the matter is not big, that is, some things were burned and no one died, but it was also very dangerous, and Yang Heng directly excluded these households and did not repair them, why, did not follow his safety regulations, once someone died, he would be scolded.

This, some far-fetched, and then back to the steam engine research site, these valves, some big, some small, but there is a unified similarity, that is, there is a long neck, that is, the handle of the valve is connected with a very long connecting rod, this is why, it is for the transmission of heat, once the heat is transmitted, and then through this long neck, when it reaches the handle, the heat is much smaller, and people can put their hands on the handle of the valve, that's it, the so-called detour, that must be avoided, If it can't be avoided, then it must also be improved in time, what, how to record history at that time, that, leave it to the historians, they can do whatever they want.

"How about a few of you, who is interested in this?" Yang Heng asked a few younger children in front of him, if they were interested, he would specially train them, but as a result, he was disappointed, none of them were interested, and they all shook their heads.

Yang Heng was disappointed, "Alas! "Big nephew, don't worry, maybe Beibei's group grows up, and they will like it." The third uncle persuaded Yang Heng on the side. (To be continued......)