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Injection type gas burner. Do it yourself


Hi friends. In a past boron machine project, I smelted aluminum from a friend of mine. He made a small gas furnace from refractory bricks and uses it for forging. So I decided to make myself a furnace for melting non-ferrous metals. And we will start with the manufacture of a gas injection burner. On the Internet there are many different drawings for its manufacture. I had to study this whole thing and choose, in my opinion, the optimal design.

Let's talk a little about how it works. There is a certain tube of clever form. On the one hand, gas flows through the nozzle. But just gas without air does not burn as we need. The burner sucks in air itself due to ejection. This is the process of mixing any two media, in our case, air and gas, in which one medium, that is, gas, being under pressure, affects the air and carries it into the mixer tube. In the place of air intake, a vacuum is created and the air itself goes where it is needed. Mixing takes place in the burner body, and the combustible mixture leaves it under pressure and creates the required temperature. Everything is simple.

In this burner, the dimensions are selected for the use of water pipes.

Stage 1: Diffuser.
Let's start with the manufacture of the diffuser. I had in my possession a piece of pipe of suitable diameter from a stainless steel from a silencer. To give the necessary shape, you need to make cuts with a grinder along the tube to the specified length. Then I picked up the cage from the bearing and stuffed it on the tube. After removal, I once again cut through the grinder. Did this until the desired diameter was formed. On the other hand, the same thing needs to be done. It remains to brew cuts and treat with a petal circle until a smooth surface is formed. If there are pores and lack of fusion, brew and clean. It is also necessary to remove the burrs inside the part with a round or semicircular file. Everything, the diffuser is ready.





Stage 2: Mixer and confuser.
The next part is the mixer. This is a simple 90 mm long tube. Diameter 22 mm. I had a chrome pipe in stock of furniture. You can use the water twenty. It is welded to the diffuser. Everything is simple here. Now you need to weld the confuser to this tube. This is the name of the cone through which air enters, and through the gap between the cone and the washer, the incoming air will be adjusted. The drawing has a scan. All necessary sizes are indicated there. I cut from a sheet 1.2 mm thick. He bent it, boiled the seam and welded it to the mixer. Here you need to make a plane from the end. An adjusting washer will adjoin it.




Stage 3: Gas and Air Supply Unit.
Now the mechanism for adjusting air and gas supply. We need a M10 bolt with a long thread. A bolt hat is not needed. From the end, we drill a through hole with a diameter of 5 mm., And cut the M6 ​​thread. As a gas jet, I used a wire feed tip from a semiautomatic device. They cost a penny, and there are with a diameter of 0.6 and 0.8 mm. There is one caveat. The tip is long and needs to be cut so that about 3-4 mm remain after the thread. On the remaining part, you can cut the thread and get another nozzle. Now you need a washer with a diameter of about 43 mm. You can look at hardware stores or cut from sheet metal.

I have machined on a lathe. A hole with a diameter of 12 mm must be drilled in the center of the washer. We weld the M10 nut to the washer. Now assemble the structure. Screw the nut onto the bolt. A mount will be welded to it. Then we wind the adjusting washer and screw the gas jet. We bend the bracket from the metal, which will fasten this assembly to the body. I cut 3 mm from metal. Now, by rotating the washer, set the nozzle flush with it. The first nut we screwed in must be located in the center of the thread. In this position, we apply all this to the confuser, then we attach the bracket and you can grab it to the nut and body. It doesn’t matter in which place to weld to the body, but the shorter the harder. If everything is smooth, then finally weld. Well, everything seems ready.






What we have. When screwing and unscrewing the bolt, we adjust the degree of ejection, so to speak. The best result is when a couple mm nozzle. enters the confuser. Here you need to twist and see. The washer controls the amount of air supplied and, accordingly, the quality of the mixture. In fact, the gas jet needs to be set once and can not be touched. And so as not to spin, you can screw the nut.

Stage 4: Test.
Let's start the tests. We put the hose on the bolt, on the gearbox we set 0.2 kg per cm squared. You can play with pressure too. But too much gas consumption leads to a quick freezing of the cylinder, especially by 5 liters. Then it is better to set the nozzle to 0.6 mm. Before ignition, the washer is completely closed or with a small gap. We set fire to the gas and slowly increase the air supply, watching how the flame turns blue and slowly moves away from the nozzle of the burner. With a further increase in air, the flame completely breaks away from the burner and it goes out. This is a feature of her work. To prevent this from happening, you need to install a barrier on the path of the flame or use it in an enclosed space. Then the exiting fire will set fire to the gas, and it itself maintains combustion. In my case, the burner will be installed in a furnace for smelting non-ferrous metals. But about her next time. An idea for a note. Old cast iron batteries.

We put the burner in the lower part, opposite to the top there is a pipe to the street. The rest is drowned out. Settings for minimum flow and can be heated garage. It works well in an enclosed space and, in theory, at optimal settings will give a temperature of about 1200 degrees. This is enough for the eyes to melt aluminum, brass, bronze, lead, hardening and annealing blades for knives. You can forge blanks from files. Mass applications.









Necessary tools and fixtures:
1. Bulgarian
2.Cutting and cleaning circle (petal possible)
3. The file is semicircular or round.
4. Protective equipment (glasses, mask, mittens)
5. Drill or drilling machine.
6. Drill 5mm, 12mm.
7. Tap M6, lerka M6
8. Welding (better semi-automatic)
9. Pipe scraps, bolts, nuts, washers.
10. Sheet metal 1.2 mm, 3 mm.
11. Tip for feeding wire from welding 0.6 and 0.8 mm.
12. Hammer, pliers, brush for metal.

Actually such a burner turned out. The test was successful. The case does not heat up during operation, you can hold it by hand. When working in an oven, heating will be anyway. At the end of operation, the burner will need to be removed. The next part will be about the oven. More details about the manufacture of the burner can be seen in the video. Thanks for attention. Until next projects!
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12 comments
Why soda? Or a little glass of water

Gee.))))) xaxa
Water of course! There was still not enough soda to wash the boar.))))
We poured hot water. Not boiling water. Also steaming. He, after all, also osmalil hot!
Then you spend with a knife and as after the Vest razor, everything is clean

I, if the boar is hefty, did not stretch my sides and back with a knife, but stretched it with a scythe! Poured, smoked, adding hot water to him (otherwise it dries, infection, quickly)))). Then, with an oblique, holding it with both hands on the heel and the end of the whole length burn several times, shaking off the shit! Then with a sharp knife already “finish” where it is uneven.))))
Cracks are usually in the abdomen, where the skin is the thinnest

More precisely, in the groin area - closer to the folds of the hind legs, and, sometimes, on the folds of the front.
That boar did not crack, it was in a shell, the knife really did not stick
In my childhood, no one kept a boar / pig for less than two years. For some reason (why ??????) they grew a “car” weighing 300, sometimes, kg. Although he devoured during this time, like four, which are 150 !!! And there was not much more meat on it - only lard grew later on!
But now, for some reason they raised such monsters, and then boasted of the thickness of fat in front of each other, measuring it in the "fingers". So they said, "My boar fat six fingers!" ... "And mine - eight!"
And then they turned the yellowing fat into a stove and fed .... the next boars!)))
For myself, they cut three such monsters a year - "before Christmas", "near Easter" and ... (attention !!!) ... "under October!".))))
It was simply unrealistic to eat such a quantity of fat by the family! .... (After all, there are still sheep, chickens, ducks, geese, rabbits, nutria). And calves sometimes ...
... Bad work, in short ...
And I pour boiling water ... so that it steams well. Then you spend with a knife and as after the Vest razor, everything is clean xaxa
Why soda? Or a little glass of water

And they all crack, it is a symbol of the youth of the pig. That boar did not crack, it was in a shell, the knife really did not stick xaxa Cracks are usually in the abdomen, where the skin is the thinnest
And we were pitching, holding a candle in a half-hand.
It is barred.
And we were tarred, holding a blowtorch in one, and a knife in the other. That is, first carefully until the "swelling of the blisters", with the simultaneous removal of the upper layer with a knife. Then, that under it - a lamp to a blue-black color !!! After the whole wild boar became a black man, he was doused with warm water abundantly, and a little waited for this blackness to become sour. Then they were scraped off with knives to white purity, while washing off with soda. And, after that, they began to disassemble.
Then the blowtorches were replaced by gas burners ...
Valery
the stars are brighter, the grass is greener
Sure, and the water is wetter and boiling water is cooler!
We were first tarred with a blowtorch. Then they washed and scraped. And after that, they slightly lined it with straw and it smoldered and fumigated a pig. That's how the straw burns out, then they chopped it.
So did my grandfather. For yourself.
Now, for sale, probably no one will do that.
taught to choose meat in the market, so that the boar was tarred straws! scratch


Another "theoretical" crap! ... "Straw = ancestral foundations = ecology = good", "gas / gas = innovations to the detriment of quality =" chemistry "= bad" ...
But in reality? ... I once saw how people, again, using "ecological pens" tried to use straw to try to make fun of them !!! Even participated in this adventure - he helped them. Because I heard from the grandmother about "Oh! We used to feed straws! Fat pahu-u-uusche!"))) (Read: the stars are brighter, the grass is greener)))). And he didn’t listen to his grandfather, who was bending at the same time and saying, “Aha! Where it got burnt, where the wool remained stuck! And everything smelled of smoke!”
Then these people themselves spat and said that there is nothing better than a gas burner !!!
Because after straw - where it is understated, where it was burnt and cracked. And underestimated = dirt !!!
But if the burner is thoroughly burned, then, accordingly, all the dirt will burn, and the disinfection, and the upper layer of the skin of the wild boar will well bubble up and will be removed, and the skin itself will be fried. And everything is even, clean and beautiful.
In short, my pragmatic grandfather was right again! ))))
My wife and I all remember that old boar that we killed ... It's just a masterpiece of meat)) Better than the young piglets that everyone loves so much. So these little pigs are just soap in comparison with this boar, real MEAT! Not tough, not smelly, so rich, mature as it were.

So we all think that we can try to buy a boar from someone at a cheap price, then we’ll be afraid to buy them, they stink ... NEVER have a boar stink from me, maybe they don’t know how to cut them? And there was meat, yes, and in the freezer, whoever didn’t try, everyone was happy, including the “city” ones.
I don’t know, according to current standards, this is prohibited, the skin should be white in the fat.

But in fact it’s not true, they do not fry them with straws, but throw the rag bags and fry them through the bag to a brown crust. And just a lamp can be fried be healthy. "It will smell like home" and without straws)) Although, if a pig lives in kakahi, then it will smell like another domestic business ...)
Dmitrij
boar will go naughty
I am not special in these matters, but one of my comrade taught me to choose meat in the market so that the boar was tarred with straws! scratch
boar will go naughty
Guest Eugene
the author, what you talked about is called an ejector. Injection is from another opera.

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