Propane burner. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Propane burner. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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One way to connect metal parts is brazing. With the correct selection of flux and solder, such connections are more reliable and can withstand fairly high loads.

Brazing is carried out with various gas burners, with and without pressurization, using liquefied propane as fuel.

A homemade injection burner can be powered from liquefied propane cylinders with a capacity of 1 liter (and the cylinders must be equipped with a valve with a hose) or from cylinders with a capacity of 25 liters.

The figure shows the burner design. All its parts are extremely simple and do not require high qualifications during manufacture.

propane burner
Rice. 1. Burner assembly: 1 - hose, 2 - gas valve, 3 - gas supply tube (6 mm in diameter), 4 - M4 screw-clamp, 5 - liner, 6 - nipple (from the stove), 7 - four holes - air intakes with a diameter of 4 mm, 8 - nozzle tube

propane burner
Rice. 2. Nozzle

propane burner
Rice. 3. Insert assembly: 1 - tube, 2 - sprocket with holes with a diameter of 1,8 mm, 3 - bushing

The torch head is made from steel pipe or turned from Steel 3 or Steel 45 on a lathe. There are four holes in the nozzle pipe that can be covered with an internal liner; This regulates the air suction, which forms the burner flame. The liner itself is also machined from steel; it can be made as a monolithic part or composed of three separate ones, followed by soldering with hard solder. In this case, an asterisk and a short section of pipe are attached to a bushing mounted on the gas supply tube.

The gas supply channel is made of a copper or brass tube with an outer diameter of 6 mm and a wall thickness of at least 1 mm. A gas valve with a hose for connecting to the cylinder is attached to one end of the tube. A nipple from a kerosene stove is screwed onto the other end of the tube, with the working part sharpened to a cone. To do this, there is no need to make any tip, since the connecting part of the primus nipple has an M5 thread, and you just need to cut the M5 thread inside the pipe and screw the nipple. In addition, at the same end of the pipe there is a tightly seated liner onto which the nozzle tube is placed.

To adjust the burner flame, open the valve, supply gas to the burner and ignite it. Then, by moving the nozzle tube towards the blocking of the four air intake holes, stable combustion is achieved. The flame can also be adjusted by changing the gas supply to the burner.

After obtaining a flame of the desired intensity and shape, the position of the nozzle tube is fixed with a clamping screw.

This burner operates steadily and produces an even flame, allowing small parts to be heated to a temperature of 1100°C.

If you do not have silver-based solders on hand, you can use plain brass wire or any copper-nickel alloys.

Author: N.Vadimovich

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