Homemade gas burners
The main components for making high-powered gas burners are industrial valves. They can be new, but for a homemade device, it is sufficient to use a used one, as long as there is no gas leakage. They are designed to be operated together with a 50 liter propane gas cylinder that has an angle valve and reducer.
Burner with valve BK-74
The design of this burner is shown in Fig. 1. Valve of oxygen cylinder BK-74 is used as base.To the outlet end a hand crank union made on a lathe is installed, to the grooved part of which a hose from the bottle is connected. On the part of the valve with conical thread K3/4˝. to connect it to a gas cylinder, screw on the cap with prepared hole with thread for jets. It is possible to use the ready variant of soldering lamp or gas stove.
The nozzle is made from a 1/4˝ piece of steel pipe 100 mm long and is welded to the cap on two ∅ 5 mm pieces of wire. Leave a distance of 15 mm between the cap and the nozzle to allow air to enter the combustion zone. Adjust the nozzle position by bending the wire holders, so that the flame is centered.
Sequence of actions to ignite the burner:
- Open the valve of the gas cylinder;
- Hold a lit match to the nozzle and slowly open the burner valve;
- Check gas ignition;
- Adjust the flame with the burner valve
A self-made gas torch of this design has one disadvantage, related to the location of the valve. The gas flow is directed in the opposite direction to the normal position. Gland seals are under constant gas pressure( watt).ч. when the valve is closed), so it is necessary to constantly check the tightness of seals.
Burner, rebuilt from acetylene gas cutter
If you have an acetylene torch with a faulty oxygen supply tap, don’t throw it away. It is also suitable for making a burner (Fig 2.). Mini gas burner
Mini gas torches are more suitable for working with small parts. The mini-burner is based on a ball inflation needle. Make a kerf in it, a little farther than the middle of the needle.Some needles already have a similar hole, which greatly speeds up the process of work. Next, you need to take a needle for a syringe, and bend it about 45 degrees in the middle.
The sharpened end of the syringe needle is best sharpened so that it is straight. It should then be inserted into the ball needle so that one end goes through the hole, and the other protrudes from the larger needle by a few mm. The resulting mini-design should be fixed by soldering. After that, the bases of the two needles should be attached to the droppers. Clamps. regulators of droppers should be moved as close as possible to the needles. In the resulting burner, they will act as gas and air regulators. They also need to be attached to each other, and it is best to do this with a heat gun. It remains only to connect the compressed gas source to the ready device, the burner is ready for use. Such homemade gas burner can heat objects up to 1000 degrees
Work with it should be careful, observing safety precautions
Design and principle of operation of the burner
Roof burner is a metal-based tumbler, equipped with a nozzle and a plastic or wooden handle attached to the body.
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The gas burner jar is designed so that the flame is protected from being blown away by the wind.
The gas flows into the housing through a special gas hose. Mainly pressurized propane gas is used. The burner has a valve to regulate the amount of gas supplied. In addition, it is also possible to adjust the flame length.
In order to reduce the gas consumption, roof burners are fitted with a pressure reducer that controls the gas flow. Absolutely all models are equipped with atmospheric air suction system.
To start the burner, use an ordinary match or lighter.
Gas burners also have a device for adjusting operating modes. For example, most models have a standby mode, the purpose of which is to prevent wasted fuel during interruptions.
Since roof burners are heated to very high temperatures during operation, they are manufactured using exceptionally heavy-duty materials.
The length of the handle to hold the burner should not be more than a meter. The device itself is very light: its weight varies from 1 to 1.5 kilograms.
To prevent burns, the burner handles are equipped with a holder made of very strong wood or heat-resistant plastic.
It should be noted that for roofing work can also be used liquid fuel burners that run on fuel oil or diesel fuel.
Possible nozzle failures
Jigglers are quite reliable elements and can last for more than a year. Change them, as a rule, in two cases: a manufacturing defect or a change in the type of fuel. Simply cleaning the parts to make them work properly.
Factors indicating that the nozzles are clogged:
- Flames with a red-yellow hue;
- The burner frequently goes out;
- the intensity of the flame varies periodically;
- the burner hardly ignites or does not ignite at all.
The part only needs to be replaced when the flame tears away from the flame spreader and is poorly controlled by the fuel supply system. Most often it is a factory defect in the nozzle. If such a problem occurs on all burners, it is likely that the reducer is defective.
Features of the gas burner
The main attractive “features” of this device. ease of use, absence of unpleasant odors, soot. Compact size is another advantage: the gas burner can be used anywhere. Conventional construction consists of several mandatory elements. These include:
The gas burner is called a propane burner, but it can also work on a mixture of butane and propane. Gas is fed through a hose from a gas cylinder. Its flow is regulated by the tap on it, but it is better to protect yourself as much as possible, so it is recommended to install a pressure-reducing reducer. Using the shut-off valve located behind the main valve, open or shut off the gas supply. The flame intensity is adjusted by the working tap.
The gas hose through which the fuel is fed is connected to the nozzle, with a nipple at the end of it. Both elements are placed in the metal bell: this is where the creation of the combustible mixture takes place. the enrichment of the combustible gas with oxygen. It then enters the combustion chamber through a nozzle. To ensure continuous combustion, there are holes in the main valve.
How to make a gas burner with their own hands at home?
Nevertheless, the self-made manufacture of these devices by craftsmen at home is common. The reason is simple. the gas burner with their own hands, adapted to the specific task and working conditions is more convenient, even if it costs more than the factory one.
What is needed to make?
Tools first. Although for the most part the assembly is made of ready-made elements, they are necessary:
- Metal hacksaw.
- A drill with a set of drills.
- Pliers, screwdriver, files personal, velvet or appropriate files.
- A set of chisels and taps with holders.
- Locksmith’s vice.
- Rubber or silicone hose to connect the device to the gas cylinder.
- Two gas valves: main valve, which opens gas supply and regulating valve, used for adjusting amount of gas supplied to combustion zone.
- A tube with a thin hole at the outlet. nozzle.
Often, the gas nozzle is called a nipple, which is wrong and contrary to the principle of the device. Nipple is a threaded tube, often with a built-in valve. Serves to connect the parts. Injector jets provide injection of the required amount of fuel into the mixing chamber (for example. carburetor jets).
The exact list will be determined when working out the detailed drawings of a homemade gas burner, based on the blanks available.
Each gas has its own characteristics. Acetylene, propane, and its mixture with butane are the most convenient for household, as well as homemade systems.
Hydrogen cylinder is quite difficult to get, methane has a higher pressure than household gas, it needs a reducer.
What to make?
Low-power gas burners for household and small private production, according to performance indicators, are classified as follows. way:
- High-temperature. for precision solder-welding, jewelry and glassblowing. Efficiency is not important, it is necessary to achieve the maximum flame temperature for the given fuel.
- Technological. for locksmith and forge work. Flame temperature is highly desirable at least 1200 degrees, and with this condition, the burner is brought up to maximum efficiency.
- Heating and roof burners. achieve the best efficiency. Flame temperature, usually up to 1100 degrees or lower.
Regarding the method of combustion, the gas burner can be designed according to one of the following. schemes:
In free-atmosphere burners, gas burns in free space; free convection ensures air flow. Such burners are uneconomical; the flame is red, smoky, dancing, and beating. Are of interest, firstly, because by an excessive supply of gas or insufficient air any other burner can be put into free-atmospheric mode.
In ejection burners at least 40% of the air needed for fuel combustion is sucked in by the gas flow from the injector. Ejector burners are structurally simple and allow for flames up to 1500 degrees with efficiencies over 95%, so are most widely used, but cannot be made modulating, see. below. The ejector burners are divided by air use into:
- Single-circuit. all the air you need is sucked in at once. With a properly profiled gas duct at capacities over 10 kW show efficiencies greater than 99%. Not repeatable by their own hands.
- Two-circuit. ok. 50% of the air is sucked in by the injector, with the rest going into the combustion chamber and/or afterburner. Allowed to get either a flame of 1300-1500 degrees, or KPL over 95% and flame up to 1200 degrees. Used in any of the above ways. Structurally quite complicated, but repeatable by our own hands.
- One and a half circuits, also often called double-circuit. the primary air is sucked by a stream from the injector and the secondary air flows freely into a limited volume (e.g., furnace), in which the fuel burns down. Only single-mode burners (see Fig. 1). but structurally simple, that is why they are widely used for temporary start-up of gas-fired heating furnaces and boilers.
In supercharged burners all the air, both primary and secondary, is forced into the combustion zone. The simplest supercharged micro-burner for table soldering, jewellery making and glazing work can be made by yourself (see Catalogue 33). further), but the manufacture of a supercharged heating burner requires a solid production base. But it is the supercharged burners allow to realize all the possibilities of combustion regime control; according to the conditions of use they are divided into:
Safety rules for gas burner operation
In operation, the gas burner accumulates a lot of soot on its surface. Soot must be removed at regular intervals to prevent the unit from breaking and working efficiently. Sometimes a large accumulation of soot can cause it to ignite. Gas boilers with closed combustion chambers should be regularly inspected and serviced by specialists. If you have experience, you can do the cleaning of the design by yourself. When installing the unit, it is imperative that the normalized distances are observed. Appliances of atmospheric type are equipped with a quality chimney, and devices of fan type. the smoke evacuation system of coaxial type.
How to replace the piezo element?
Gas burner repair with your own hands will always be necessary if there is no spark. This failure in most cases indicates a breakdown of the “device in the device”. Therefore, there is only one way out: replacing the failed element. This operation is not so complicated, and the purchase of a new piezo, most likely, also will not be required.
I must say right away that the external differences of gas burner models do not affect the designs. All devices have the same set, the elements are standard, so it is quite easy to find a replacement. As already noted, it is the piezo element that most often fails. Failure is provoked by water, other liquids, breakdown is possible due to a strong blow, dropping the device from a great height, etc. д.
How to make a nozzle on a gas burner for repair / simple idea of homemade
To repair the gas burner with his own hands, the master will need the following tools and materials:
It is good, if you have a new or empty lighter at home, because it is easier to get the piezo element from it.
First of all the apparatus is checked to make sure that there is no sparking again. After obtaining proof of the failure of the device disassemble its case. During this work, carefully examine the condition of the other parts, such a check is more about various contaminants. They must be discarded immediately.
After reaching the piezo element, cut the wire, which connects it to the burner. Then it is removed. This is also how you remove the element from the gas lighter. There should be enough wire to connect it to the burner.
When replacing the device for the conductors, shrink tubing is used, which is heated with a lighter. Reassemble the repaired gas burner in exactly the same sequence as disassembled.
After completing the operation, the appliance is tested. If no mistakes have been made, the gas burner should work perfectly.