RU1777639C - Gas torch - Google Patents

Abstract

Use: for welding and cutting metals. The inventive gas burner contains a handle with nipples and control valves and a tip with a mixing chamber, an injector in its straight section and a replaceable mouthpiece. The mixing chamber is made detachable and has a replaceable core, and the injector is equipped with a replaceable head, the length of the tubular injector body is at least 0.8 of the length of the straight portion of the tip, 2 sludge.

Description

The invention relates to devices for gaseous fuels, in particular those intended for welding or cutting metal.

Known gas injection torches serve to mix injected and injectable gases and form a welding flame. Similar burners are also used in acetylene-oxygen torches.

An injector in the art is called a jet pump in which the movement and compression of one of the injected gases is accomplished by using the force of the jet of the other injecting gas. In order to carry out this process, an injecting gas, usually oxygen, must enter the injector at a higher pressure than the injected gas, usually acetylene. In the mixing chamber, the flow rate of the oxygen stream decreases and the speed of the acetylene stream increases. 14 both gases are mixed.

Since this principle is preserved in all injection burners and cutters, while the device of the injector and the mixing chamber have no differences, we will analyze only one analogue (it is also a prototype) - the acetylene-oxygen burner GS-53 Ego is the most common at present time burner. It consists of a handle with two nipples for supplying injected and injecting gases, two valves for regulating these gases and a tip. An injector and a mixing chamber are located in the direct part of the tip, and the bent part is provided with a replaceable tip. In order that the burner can be used in various conditions, determined by the flow rate of acetylene from 50 to 2800 l / h, it is equipped with seven tips. Each of them differs from each other by the parameters of the injector and the mixer, as well as the mouthpiece, and in particular, by the dimensions of the channels for gases and, respectively, for their mixture.

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There are two significant drawbacks to this hump - high cost and low safety. The first disadvantage is explained by the fact that relatively large amounts of metal are consumed in the manufacture. In addition to the consumption of metal on one main burner, i.e. per burner with a single tip, more than 1 kg of non-ferrous metals is required to produce a set of tips. Moreover, we do not take into account the loss of metal during its processing. The cost includes the payment for the manufacture of all additional tips. The total cost is significant. The second drawback is that low operational safety is explained by the fact that gas mixing occurs in the immediate vicinity of the handle, since the injector is adjacent to it. This is fraught with the penetration of flames in the case of sometimes occurring in a reverse impact into nipples and further into gas sources. Typically, the valves cannot block the gas access to the injector, since the flame almost instantly leads to an explosion,

The purpose of the invention is to reduce costs and increase operational safety.

The goal is achieved in that the mixing chamber with the injector head is interchangeable, and the length of the injector body is at least 4/5 of the length of the straight part of the tip. When the length of the tubular body of the injector is 4/5 or more from the dpin of the straight part of the tip, the safety during operation of the burner is maximally possible, since under this condition the place of gas mixing is maximally distant from the handle, which significantly reduces the likelihood of a backfire . In practice, it is not possible to make the length of the tubular body equal to the length of the straight part of the tip, since approximately 1/5 of the part is occupied by the mixing chamber (core) 12 and part of the injector liner (removable head) 11.

Analysis of compliance of the claimed decision with the criterion of novelty.

Salient features of the prototype:

1. Handle with two nipples for supplying injected and injecting gases.

2.Fans for regulating the flow of gases.

3. A set of interchangeable tips, each of which contains an injector and a mixing chamber, located in the straight part of the tip, as well as a replaceable mouthpiece in the bent part of the tip.

4. The body of the injector is continuous, and its length does not exceed 1/10 of the straight part of the tip.

5. The housing of the mixing chamber is the expanded portion of the tip.

Salient features of the claimed decision:

1. A handle with two nipples for supplying injected and injecting gases.

2.Fans for regulating the flow of gases.

3. The tip equipped with replaceable mixing chambers, injectors and

5 mouthpieces.

4. The injector has a detachable interchangeable head, and its body length is at least 4/5 of the length of the straight part of the tip.

05. The mixing chamber is made

detachable, has a one-piece interchangeable core.

Thus, the distinctive essential features 3, 4, 5. The whole set

5 essential features of the claimed decision allows achieving the goal (see below the description of the operation of the device).

In the sources of information known to us, no totality of features was found that was identical or equivalent to the claimed property. Therefore, we can assume that this solution meets the criterion of novelty.

5 Analysis of compliance of the claimed decision with the criterion of significant differences.

In the information literature, we did not find detachable injectors, interchangeable mixing chambers together

0 with injector heads. Namely, these signs of the new solution make it possible to create universal gas burners equipped not with a set of bulky tips, but only with a set of essentially

5 tiny mixing chambers with injector heads. In this case, the range of use of the burner can be significantly expanded both in the direction of decreasing and in the direction of increasing the consumption of acetylene in

0 unit of time without increasing the weight of the spent metal, and vice versa - with its significant savings in comparison with the known burner. A set of fifteen mixing chambers and corresponding 5 injector heads can fit in a matchbox.

It should be noted that when using the proposed solution, it is possible to narrow down each of the applied ranges of acetylene consumption, which

Each of the modes will provide savings in the gases used, improve their mixing and increase the temperature of the flame.

Thus, the new distinguishing features are not only unknown, but also give the aggregate new properties. Based on clause 6.03, EZ-2-74, the claimed decision should be considered significant differences corresponding to the criterion.

Figure 1 is a block diagram of a burner, a General view; Fig. 2 - replaceable parts and injector body removed from the straight part of the tip.

The device consists of a handle 1, into the cavity of which nipples 2 and 3 are inserted to supply the injected and injected. call (most often it is oxygen and acetylene, respectively). Valves 5 and 4 are designed to regulate these gases when they are fed into the channels (not shown in the drawing) of the handle 1. A tip is attached to the handle 6. A replaceable mouthpiece 9 is located on its straight portion of the tip 6. The injector consists of a tubular body 10 and removable head 11. The mixing chamber 7 consists of a core 12, essentially being directly the mixing chamber itself. The portion of the tip where the core is located is simply the second wall of the mixing chamber.

The device operates as follows.

After the supply of oxygen and acetylene through the nipples 2 and 3 at a certain position of valves A and 5, oxygen enters through the internal channel of the handle 1 into the channel of the injector 8, passing in the tubular body 10 and head 11, and then to the core 12 of the mixing chamber 7 A jet of injecting oxygen creates a vacuum in the acetylene channels of the head of injector 11. This promotes the absorption of acetylene (injected gas) into the mixing chamber (core 12). Both gases are mixed. The mixture then goes

to the internal channel of the bent part of the emergency player 5 into the mouthpiece 9.

The replacement of the mixing chamber, and more precisely the core 12. also the injector head 11 and the mouthpiece is carried out as follows.

Disconnect the tip b from the handle 1. Unscrew the tubular body 10 and the head 11 of the injector 8, disconnect the housing

(external) mixing chamber 7 and turn out the mixing chamber (core) 12. Take the injector head with the required parameters, the core of the mixing chamber and assemble in the reverse order: assemble the mixing chamber, after attaching the injector head to it, insert the tubular body of the injector into the straight part of the tip 6 from the side of the handle 1 provides the connection of the tubular injector body with the injector head and screw the desired mouthpiece into the bent part of the tip. The attached photo allows us to judge the simplicity of replacing the mixing chamber, injector head and their miniature.

The new design of the gas burner provides not only wider possibilities of its use, saving

non-ferrous metals and the reduction of operational hazards (the latter, as already noted) is due to the significant distance of the gas mixing point from the handle. The entire set of the new burner is more aesthetic.

Claims (1)

SUMMARY OF THE INVENTION A gas burner comprising a handle with nipples and control valves and a tip with a mixing chamber, an injector in its straight section and a replaceable mouthpiece, characterized in that, in order to increase operational reliability, the mixing chamber is made detachable and with a replaceable core and the injector is equipped with a replaceable head, the length of the tubular body of the injector being at least 0.8 of the length of the straight portion of the tip.  1 HER iO (rig.