Torch for gas-flame soldering. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Torch for gas-flame soldering. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

Comments on the article

The propane-butane mixture, which is filled with cylinders for domestic gas stoves, under optimal conditions burns in air with a flame temperature of up to 1200 ° C. It is enough to work with "hard" (medium-melting) solders: copper-zinc (brass), silver. But in order to get such a flame, the burner must ensure good mixing of gas with air, that is, their supply in a strictly defined ratio - no more and no less! For the convenience of working with small parts, the torch should be thin, but at the same time stable and hot enough.

The gas pressure in the cylinder is 16 atm., It is too high for such a thing, so it is necessary to limit the pressure supplied to the burner to 1,5-3 atm., Using a welding reducer or a valve from the ski tarring kit. In this case, the nozzle jet should have a diameter not more than 0,1 mm. To protect it from accidental clogging at the outlet of the cylinder, a filter element is required, for example, a ceramic one - from a fine fuel filter for the ZIL-130 engine, or a home-made one - from a small ceramic grinding head. Since the burning rate of the gas-air mixture is relatively low, with a rapid outflow from the jet, the mixture may not have time to ignite - the flame will break off and the burner will go out. gas ignition "crown".

Rice. 1 (click to enlarge). Gas injection burner: 1 - gas supply pipe with a diameter of 10x2 (steel); 2 - handle (wood); 3 - nozzle (steel); 4 - body (brass); 5 - brass divider)

All this was realized in a simple, easy-to-replicate design. The burner consists of only five parts: a handle, a supply pipe, a body, a nozzle and a divider.

The wooden handle was used from a blown soldering iron.

The inlet steel tube has an outer diameter of 10 mm and a wall thickness of 2 mm. At one end, three conical belts are machined for tight connection of the hose, and at the other, an M10 thread is cut. Slightly bending the tube on this side, inserted it into the hole in the handle and fixed it there with glue.

The body and divider are machined from a brass bar with a diameter of 20 mm. Two radial holes with a diameter of 5 mm are carefully drilled in the case - for air supply. Four radial holes with a diameter of 1 mm in the splitter rod provide gas supply to the group of pilot holes in the front flange of this part.

During assembly, the divider was pressed into the body with a slight interference fit. The inner flange of the divider, on the contrary, was installed in the body with a guaranteed clearance: its diameter was machined 0,6 mm less than the inner diameter of the body. This gap is necessary for throttling (braking) the gas flow supplied to the igniter holes.

The nozzle blank is machined from a steel bar. And her thin hole was made as follows. A blind central hole was made with a drill with a diameter of 2 mm, not reaching the exit of 1,5 mm, and the jumper was drilled with a drill with a diameter of 0,4-0,5 mm. Then, with light blows of a hammer, this hole was completely minted. Further, gradually undermining the end with a file or sanding paper, we found a section where the outlet had the required size. This is how the place was defined. Screw the nozzle onto the threaded tip of the burner tube. We put the inlet rubber-fabric hose from the cylinder reducer on the shank of the supply tube and secured it with a clamp. Having set the working pressure, gas was supplied and, after waiting for it to displace air from the hose, the nozzle (without the body and divider) was introduced into the flame of the gas burner. By grinding the end, we achieved a length of the burner torch of 5-6 cm.

The flame of the burner should be even, without soot. Otherwise, regulate the amount of ejected air by turning the housing on the nozzle thread. If the threaded connection is very loose, it is sealed with FUM tape.

Author: A. Giryavets

See other articles Section Ham Radio Technologies.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Material with 99,7% light absorption 05.11.2015

Scientists from the King Abdullah University of Science and Technology (Saudi Arabia) have developed a material that has a record absorption of light.

The new material is made from specially shaped gold nanoparticles, each of which is a sphere with a rod attached. Such particles, located randomly, are able to work as a network of waveguides, capturing photons.

During the experiments, scientists managed to achieve the absorption of 98,43% of light in a layer of nanoparticles with a thickness of 10,2 micrometers. This absorption value corresponded to the wavelength range from violet 400 nanometers to infrared 1400 nanometers.

In this case, the illumination angle deviated from the vertical by up to 60°, and the peak absorption was 99,7%, which is a record for layers of this thickness. Theoretically, the new system has no absorption limit, and on its basis it is even possible to create a coating with 100% light absorption.

The idea of creating a structure was borrowed by Arab physicists from nature itself: the elytra of beetles of the genus Cyphochilus are the direct opposite of the new material, possessing almost ideal light scattering of optical wavelengths.

Other interesting news:

▪ New data digitizers

▪ New generation of OctaBus memory interface

▪ Why can't you eat if you eat a lot

▪ GaAs-solar panels for roofs of electric vehicles

▪ Rapid Cold Brew Coffee Maker for cold drinks

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Dosimeters. Selection of articles

▪ article Methods of extraction and disinfection of water in conditions of autonomous existence. Basics of safe life

▪ article What is atomic energy? Detailed answer

▪ article Working on film lamination machines. Standard instruction on labor protection

▪ article High resistance wires. Encyclopedia of radio electronics and electrical engineering

▪ article Psycho-emotional correction device. Encyclopedia of radio electronics and electrical engineering

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews