KR20120042277A - Linear heating device for using brown gas - Google Patents

Abstract

PURPOSE: A linear heating device for hydrogen-oxygen mixed gas is provided to prevent backflow of flame caused by user's unintended contact to a base material of a nozzle tip. CONSTITUTION: A linear heating device for hydrogen-oxygen mixed gas comprises a torch(20) which is connected to a fuel supply part and a nozzle tip(30) which is formed on the leading end of the torch to make flame exposed through a flame hole. The nozzle tip comprises a support for maintaining a distance from a base material to be heated. The flame hole of the nozzle tip has a front end diameter smaller than the rear end diameter thereof in order to prevent the backflow of flame.

Description

Linear heating device for using hydrogen gas

The present invention relates to a linear heating apparatus for a hydrogen oxygen mixed gas, and more particularly, a torch held by a worker while improving workability and safety by efficiently using a hydrogen oxygen mixed gas, which is an advantage of a clean and straight forward flame. The present invention relates to a linear heating apparatus for a hydrogen-oxygen mixed gas having a supporting support and a roller to prevent a backflow phenomenon caused by contact with the heating base material of the nozzle tip due to worker fatigue or carelessness.

In general, the lower part of the ship's hull is composed of curved surfaces, and a method of bending the steel plate for forming the hull shell by applying heat in a constant direction is adopted. This bending process is called a line heating process by applying heat in a constant direction on an iron plate. This linear heating method is performed entirely by hand. In order to perform the curved processing, various processing information such as heating position, heating rate, cooling position, cooling rate, etc. must be known. In the past, such processing information was determined by the judgment of a person with abundant working experience, and no technical system or database related thereto was established.

Since the bending of such a steel plate needs to be processed with a complicated and delicate curvature according to the site | part of a ship structure, it cannot cope only with a simple and uniform press work. Therefore, after rough press processing is generally performed, a bending process by linear heating, that is, a method of locally heating a steel plate linearly using a gas burner or the like and performing water cooling immediately after heating is used.

Since the bending process by such linear heating requires a long time in order to make a predetermined shape, it is one of the bottlenecks of the shipbuilding process, and it is a factor of cost increase. Therefore, the means which contributes to the improvement of work efficiency is desired.

The thermal deformation of the steel sheet by linear heating is a phenomenon in which the heating portion of the steel sheet yields and plastically deforms due to restraint from the surrounding unheated region when the heating portion contracts by cooling after thermal expansion. Therefore, many techniques regarding the steel plate which aim at raising the deformation amount by linear heating by controlling the yield strength of the steel plate and controlling the yield strength are proposed.

The conventional hot processing method is largely divided into line heating and triangularity heating. The linear heating method is a method of generating bending in a plate by heating and cooling in a straight or arbitrary curved form using gas as the main heat source for the surface of a steel plate when applied to the hull shell processing, while triangular heating method, aka The partial heating method is a method of locally heating and cooling the edge of the steel sheet to cause shrinkage. The cooling is performed to prevent heat from being transferred to another part, thereby inducing local inplane deformation. The heating surface is so close to triangle that it is called triangular heating.

At present, the above-mentioned hot working of curved outer plate is carried out by the whole manual work of skilled man of skill by using gas heat source, and there is a limit to the improvement of working speed and the improvement of precision. Due to the differences in work methods and standardization of work and the transfer of skills, it is also difficult for low-skilled non-skilled workers.

At this time, since fossil fuels such as LPG can be combusted by mixing oxygen, two lines are formed in the torch to form an oxygen line and a fuel line.

However, the hydrogen oxygen mixed gas contains its own oxygen in a ratio of 2: 1 of oxygen that hydrogen can burn, so that the line of the torch can be simplified to one line. In this case, it is important that the hydrogen oxygen mixed gas has a combustion speed of about 9.5 m / s and the flame is not flowed back when using the nozzle tip for heating the hydrogen oxygen mixed gas.

In addition, the manual torch is required to improve the hand and shoulders due to the weight of the on-line heating, and the nozzle is in contact with the iron plate due to the carelessness of the operator, the flame is often reversed. In addition, although the distance between the nozzle and the flame is visually adjusted during on-line heating, this operation can be difficult. Therefore, the distance between the nozzle tip and the heating substrate (iron plate) is always maintained uniformly, reducing the error range and improving the quality and the working speed. It is important.

Conventional linear heating is used to form a flame using fuel and oxygen in the form of LPG, LENG, acetylene, ethylene, and the like. Use hyperbaric oxygen to make flames.

At this time, the pressure of the gas fuel is 2 ~ 3bar, the pressure of oxygen is 10 ~ 12bar using the torch 20, the flame is ejected from the nozzle tip 30, the flame is formed on the heating base material, but to create a heat source The noise reflected from the base material due to the high cost, large amount of carbon dioxide emission, and gas pressure is about 100 ~ 120db, which generates tremendous noise.

However, despite the fact that there are no alternatives, it is the cause of bad tide that worsens the working environment. Therefore, it cannot be used for about a month even though the earplugs are caused by respiratory diseases caused by harmful gases and environmental noise. When it passes, fine ears tend to eat.

Accordingly, it is easy to form high temperature flames and concentrate heating due to rapid combustion in case of linear heating bending using hydrogen mixed gas which is clean and has high straightness as an alternative to eliminate carbon dioxide and reduce noise below 75db. Therefore, a method of shortening the bending time without emitting carbon dioxide and reducing fuel costs and noise is required.

The gaseous fuel must be supplied through a large-capacity hydrogen-oxygen mixed gas generating means that can replace fossil fuels. Appropriate backflow prevention measures, heating torch for hydrogen coral mixed gas and nozzle tip shall be provided.

An object of the present invention is to provide a torch held by the operator while improving the workability and safety by the nozzle tip itself by providing a nozzle tip of a special structure that efficiently utilizes a hydrogen mixed gas, which is an advantage of a clean, straight forward flame. It is to provide a linear heating apparatus for the hydrogen oxygen mixed gas having a support and a roller to prevent the backflow phenomenon caused by contact with the heating base material of the nozzle tip by fatigue or carelessness of the operator.

According to the present invention for solving the above problems, the flame is provided to the tip portion through the torch 20 connected to the fuel supply unit, and the flame hole 32 provided inside the torch 20, the flame hole 32 provided therein; Nozzle tip 30 to be discharged, and the nozzle tip 30 is configured to include a support 40 for maintaining the distance to the base material to be heated, flame hole provided in the nozzle tip 30 (32) is hydrogen oxygen, characterized in that the diameter of the tip end side outlet opening (32b) to be discharged flame is configured relatively smaller than the diameter of the proximal end inlet (32a) to prevent the flow of flame back from the tip end side to the inside A linear heating apparatus for a mixed gas is provided.

The present invention is an alternative to eliminate the carbon dioxide and reduce the noise to 75db or less due to the nozzle tip of the special structure in the torch is fast in the case of linear heating bending using hydrogen oxygen mixed gas which is clean and high temperature straightness advantage It is easy to form flame and high temperature heating due to combustion, shorten bending time without releasing carbon dioxide, reduce fuel cost, reduce noise, prevent flame backfire and increase work efficiency and safety. Can be improved.

In addition, the present invention is a nozzle tip is supported by a support to maintain the distance to the base material to be heated, the support is provided with a roller, the roller is configured to be rotated 360 °, the nozzle and the flame with the naked eye during linear heating By maintaining the distance between the nozzle tip and the heating base (iron plate) by the support and the roller without adjusting the distance of the roller, it is possible to reduce the error range and improve the quality and working speed. By fixing a triangular support with a removable 360 ° rotating roller at the part leading from the torch to the nozzle tip, the operator can freely carry out the on-line heating in the direction he or she wants while holding the torch on the floor. Since the nozzle is prevented from touching the steel plate at the interval between the nozzle and the roller, it is possible to prevent the nozzle from touching the steel plate due to the operator's carelessness and preventing the flame from flowing back.

1 is a side view of a linear heating apparatus for a hydrogen oxygen mixed gas of the present invention
Figure 2 is a front view showing the support and the roller, which is another main part of the linear heating apparatus for hydrogen oxygen mixed gas of the present invention
3 is a side view of FIG. 2
4 and 5 are perspective views showing the proximal end and the distal end of the nozzle tip which is the main part of the present invention;
Figure 6a is a side cross-sectional view showing the internal structure of Figure 5
6B is a side cross-sectional view showing the internal structure of another embodiment of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a side view of a linear heating apparatus for a hydrogen oxygen mixed gas of the present invention, FIG. 2 is a front view showing a support and a roller as another main part of the linear heating apparatus for a hydrogen oxygen mixed gas of the present invention, and FIG. 3 is a side view of FIG. 4 and 5 are perspective views showing the proximal end side and the distal end side of the nozzle tip which is the main part of the present invention, FIG. 6A is a side cross-sectional view showing the internal structure of FIG. 5, and FIG. 6B shows the internal structure of another embodiment of FIG. 5. Side cross section view. Referring to this, the present invention includes a torch 20 connected to a fuel supply unit, and a nozzle tip provided at the front end of the torch 20 to discharge the flame through the flame hole 32 provided therein. In the linear heating apparatus including 30, the nozzle tip 30 has a diameter of the inlet port (b) at the proximal end of the discharging port 32b on the distal end side to which the flame is discharged so as to prevent the flow of flame back from the distal end side. 32a) A linear heating apparatus for a hydrogen-oxygen mixed gas, which is configured to be relatively small compared to the diameter.

In addition, the flame hole 32 of the nozzle tip 30 is configured in the form of a tapered hole in which the diameter gradually decreases from the proximal end side to the distal end side, so that the diameter of the distal end side discharge port 32b for discharging the flame is proximal end inlet ( It is relatively small compared to the diameter of 32a). Therefore, the flame speed of the hydrogen oxygen mixed gas is increased to prevent the flow of flame back into the flame hole 32 of the nozzle tip 30, and the discharge speed of the flame is increased to increase the speed of the linear heating operation. It becomes possible. The hydrogen oxygen mixed gas contains its own oxygen in a ratio of 2: 1 in which hydrogen can be combusted so that the line of the torch 20 can be simplified to one line, and the hydrogen oxygen mixed gas is about 9.5 m. The combustion speed is fast at / s and the flame is not flowed back when using the nozzle tip 30 for the hydrogen-oxygen mixed gas linear heating, thereby improving heating accuracy and increasing safety.

The flame hole 32 of the nozzle tip 30 may be composed of a first flame hole 32 communicated with the proximal end and a second flame hole 32 communicated with the distal end. The diameter of the two flame holes 32 is configured to be relatively smaller than that of the first flame hole 32, and as a result, the velocity of the hydrogen-oxygen mixed gas in the first flame hole 32 is increased so that the nozzle tip 30 It is possible to prevent the phenomenon of flame flow back into the flame hole 32, it is possible to obtain effects such as improved heating accuracy and work speed.

Therefore, the present invention is an alternative to eliminate carbon dioxide and reduce the noise to 75db or less, the high temperature flame formation and intensive heating due to the rapid combustion in the case of linear heating bending using hydrogen oxygen gas, which is clean and high temperature straightness advantage This makes it possible to shorten the bending time without releasing carbon dioxide, reduce fuel costs and reduce noise.

The gaseous fuel must be supplied through a large-capacity hydrogen oxygen mixed gas generating means that can replace the fossil fuel. The hydrogen oxygen mixed gas has a significantly faster combustion rate of 9.5 m / s than the conventional fossil fuel. It is provided with a reverse flow prevention means and a nozzle tip 30 dedicated to the hydrogen coral mixed gas for this combustion rate.

On the other hand, the nozzle tip 30 is supported by the support 40 to maintain the distance to the base material to be heated, the support 40 may be provided with a roller 50. At this time, the roller 50 may be configured to be rotated 360 ° relative to the support shaft, it may be configured in the shape of a spherical ball installed in the roller 50 bracket connected to the support 40 so as to enable a rolling motion. In this case, the support roller 40, the torch 20 and the nozzle tip 30 can be moved more smoothly than the wheel-shaped roller 50 rotates about the support shaft, which is more advantageous in terms of ease of operation. .

Conventionally, the distance between the nozzle and the flame is visually adjusted at the time of linear heating, but this operation can be difficult. In the present invention, the nozzle tip 30 and the heating base material (iron plate) are further provided because the support 40 and the roller 50 are further provided. By keeping the distance between) always uniform, it can reduce the error range and improve the quality and work speed.

In the present invention, a triangular support 40 mounted with a detachable 360 ° rotating roller 50 is fixed to the portion leading from the torch 20 to the nozzle tip 30, and the torch 20 is placed on the floor. In this condition, the operator can freely perform linear heating in the desired direction without any trouble. To prevent backflow. At this time, the support 40 may have a structure in which the upper end portion is detachably coupled to the circumference of the torch 20 through the bracket and the bolt.

In addition, although the distance between the nozzle and the flame is visually adjusted during linear heating, this operation can be difficult, so that the distance between the nozzle tip 30 and the heating base material (iron plate) is always maintained uniformly to reduce the error range and to reduce the quality and work speed. It will be possible to improve.

In addition, the support 40 itself is configured so that at least two bars can be folded or unfolded in a telescopic manner so that the vertical length is adjustable, it is also possible to easily adjust the angle and height of the nozzle tip 30.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various permutations, modifications, and changes can be made without departing from the spirit of the present invention. It will be apparent to those who have it.

20. Torch 30. Nozzle Tip
32. Fireball 32a. Entrance
32. Discharge port 40. Support stand
50. Roller

Claims (6)

A torch 20 connected to a fuel supply unit, a nozzle tip 30 provided at a tip end of the torch 20 and having a flame hole 32 provided therein to discharge the flame to the tip part, and the nozzle tip 30 is configured to include a support 40 for maintaining a distance to the base material to be heated, the flame hole 32 provided in the nozzle tip 30 is a flame flow back from the tip side to the inside A linear heating apparatus for a hydrogen-oxygen mixed gas, characterized in that the diameter of the distal end side injection port 32b for discharging the flame is relatively smaller than the diameter of the proximal end inlet port 32a.
2. The flame hole (32) according to claim 1, wherein the flame hole (32) is configured to have a relatively larger diameter than the first flame hole (32) and the first flame hole (32) in communication with the distal end side discharge port (32b). And a second flame hole (32) communicating with the one flame hole (32) and communicating with the proximal end inlet (32a).
2. The flame hole (32) according to claim 1, wherein the flame hole (32) is formed in a tapered hole shape whose diameter gradually decreases from the proximal end side to the distal end side, and the diameter of the distal end side discharge port (32b) of the nozzle tip (30) is proximal end inlet. A linear heating apparatus for a hydrogen-oxygen mixed gas, characterized in that it is configured relatively smaller than the diameter of (32a).
The method of claim 1, wherein the nozzle tip 30 is supported by the support 40 to maintain the distance to the base material to be heated, the support 40 is characterized in that the roller 50 is provided with hydrogen Shipboard heating device for oxygen mixed gas.
The linear heating apparatus for a hydrogen-oxygen mixed gas according to claim 4, wherein the roller (50) is configured to be rotatable 360 ° with respect to the support shaft.
5. The linear heating apparatus for hydrogen oxygen mixed gas according to claim 4, wherein the roller (50) is formed in a ball shape installed on the roller (50) bracket connected to the support (40) to enable rolling motion.

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