JPS6122113A - Gas heater - Google Patents

Abstract

PURPOSE:To prevent the vanishing of flames and improve working property by a method wherein the part of a supplying pipe, connecting a gas tank and injection nozzle is arranged in the flame of an evaporating gas injected. CONSTITUTION:The horizontal portion 3a of the gas supplying pipe 3 is a tank- out part provided the upper one side of the gas tank 1, an upright portion 3b is connected with a flame device 6 by a heating portion 3c, the part of it forms a spiral portion arranged in the flame of the flame device 6. The vaporized gas of the gas tank 1 is injected from a nozzle 6a after passing through the gas supplying pipe 3. When it is ignited, the flames are focused and ejected forward by a flame cover 6b, therefore, the spiral part of the heating portion 3c is heated and the temperature of the evaporated gas through there is risen. As a result, the preheated evaporating gas is led to the nozzle 6 and good combustion efficiency is obtained, in addition to this, an high temperature heat returns into the gas tank 1 passing through the gas supplying pipe, the temperature drop of the gas tank is decreased, a liquid gas is evaporated surely and the vanishing of the flame may be prevented. The working of the gas tank may be performed freely and the precision of working may be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a small gas heating machine used for pipe bending, denture processing, etc.

"Prior Art" A gas heater is a device that vaporizes and burns liquid gas as a fuel, and is often used to heat a workpiece.

Conventional small gas heaters are equipped with a gas tank for storing fuel, an injection nozzle for injecting gas, a gas supply pipe connecting these gas tanks and the injection nozzle, and an on-off valve for opening and closing the path of the gas supply pipe. There is no need to hold the handle on the side of the tank to carry out the work.

In such a gas heater, an on-off valve is normally closed, and compressed liquid gas is stored in a gas tank.

When the on-off valve is opened, the pressure inside the gas tank decreases, the liquid gas begins to vaporize, and the vaporized gas passes through the gas supply pipe and is injected from the injection nozzle. The vaporized gas is ignited to burn and radiate as flame.

This type of gas heater has the advantages of being able to perform high-load combustion and making it easy to adjust various fuel characteristics such as temperature.
It is used for various tasks.

"Problems to be Solved by the Invention" However, the above-mentioned small gas heater has the following drawbacks.

(1) When the liquid gas vaporizes, the heat inside the gas tank is taken away, and the gas tank is cooled to, for example, about -10°C. Since liquid gas is in a stable state at low temperatures, if it is cooled as described above, vaporization will be reduced, and the flame may disappear within about three seconds after ignition.

(2) As the amount of gas in the gas tank decreases, the gas pressure decreases and the flame may go out. In such cases, the liquid gas in the gas tank cannot be used completely.

(3) Since the gas tank is cooled as described above, it becomes difficult to hold the gas tank in your hand for work. Although the gas tank is equipped with a handle, it is convenient to hold the gas tank itself in order to perform detailed work efficiently.

"Means for Solving the Problems" The present invention aims to solve the above-mentioned drawbacks, and has the purpose of solving the above-mentioned drawbacks. A gas heater is proposed, which is characterized in that it is disposed within the flame of vaporized gas injected from a nozzle.

"Example" Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a gas heating machine according to the present invention, FIG. 2 is a side view of the gas heating machine, and FIG. 3 is a front view of the gas heating machine.

In these drawings, reference numeral 1 denotes a cylindrical gas tank into which butane gas fuel is loaded, which is a sealed hollow part, and liquid gas is injected through a well-known injection valve 2 provided at the bottom of the gas tank 1.

3 is a gas supply pipe, which is formed from a horizontal portion 3a, an upright portion 3b and a heating portion 3C.

The horizontal part 3a is a draw-out part provided at the upper part of the gas tank 1, and the upright part 3b is connected to this horizontal part 3a, and the horizontal part 3a is equipped with a well-known gas regulating valve 4.

The gas control valve 4 opens and closes the path of the gas supply pipe 3 and adjusts the path diameter by rotating a knob 5.

The upright portion 3b also serves as a support for a flame device 6, which will be described below, and as shown in the figure, the flame device 6 is fixed horizontally to its tip.

The heating portion 3C connects the upright portion 3b and the flame device 6, and a portion thereof forms a spiral portion disposed in the flame of the flame device 6.

The flame device 6 includes an injection nozzle 6a and a cylindrical flame cover 6b protruding forward, and a spiral portion of the heating portion 3C described above is provided along the inner peripheral surface of the flame cover 6b. Note that the holes 6C provided in the flame cover 6b are air circulation holes.

In the above-mentioned small-sized gas heater, after gas fuel is pressurized into the gas tank 1, by rotating the knob 5, the pressurized gas is sent through the gas supply pipe 3 to the injection nozzle 6a, and the vaporized gas is injected. When ignited, flame is emitted from the injection nozzle 6a.

Since the flame is focused by the flame cover 6b and radiated forward, the spiral portion of the heating portion 3C is heated, and the temperature of the vaporized gas passing through the heating portion 3C is increased.

As a result, the vaporized gas whose temperature has been raised in advance flows into the injection nozzle 6.
Since the gas is guided to the gas supply pipe 3, the combustion efficiency is good.
Since it is returned to gas tank 1 through gas tank 1
The cooling effect of

When stopping the flame emission, the knob 5 is rotated in the opposite direction to the above to cut off the path of the gas supply pipe 3.

Note that various liquid gases can be used as the fuel, but if commercially available butane gas is used, it is convenient because it can be easily purchased and the fuel can be supplied.

"Effects of the Invention" (11) As mentioned above, the gas heater according to the present invention can supply heated vaporized gas to the injection nozzle, has good combustion efficiency,
Compared to conventional gas heaters, the same amount of heat can be obtained with less fuel consumption, resulting in lower fuel costs.

(2) Furthermore, since the temperature of the gas tank does not decrease much, the liquid gas can be reliably vaporized and the flame can be prevented from disappearing during ignition, and even if the amount of gas in the gas tank is low,
It is economical because the flame does not disappear and it can be used until most of the fuel is consumed.

Furthermore, the gas tank can be held in hand, which is very convenient for detailed work, and can be expected to improve the precision of work.

[Brief explanation of the drawing]

° The drawings show an embodiment of the gas heating machine according to the present invention, FIG. 1 is a longitudinal sectional view of the gas heating machine, FIG. 2 is a side view of the gas heating machine, and FIG. 3 is a side view of the gas heating machine. It is a front view. ■...Gas tank, 3...Gas supply pipe, 3a...
Heating part, 6... Flame device, 6a... Injection nozzle. First FI! J Figure 3 Figure 2

Claims (1)

[Claims] A gas heating machine characterized in that a part of a gas supply pipe connecting a gas tank and an injection nozzle that injects vaporized gas sent from the tank is disposed within the flame of vaporized gas injected from the injection nozzle.