JPS5828913A - Gas burner - Google Patents

Abstract

PURPOSE:To improve the availability of a gas burner which is suitable for use with a heater for heating road paving asphalt by a method wherein the use of both a liquefied gas and a liquid fuel such as kerosene oil is made possible such that the former is used only for ignition while the latter is used after ignition and the switching between the two is made automatically. CONSTITUTION:When a gas burner is used, a pressure adjusting valve 11 of a liquefied gas bomb 12 is opened so as to introduce the liquefied gas into a vaporization pipe 2 through a check valve 9 and a branch pipe 8. The liquefied gas is then supplied into a combustion cylinder 1 through a venturi nozzle 17 and is ignited by being injected into a combustion port 19 so that the vaporization pipe 2 is heated. Next, a valve 3 of an oil tank 4 is opened whereupon the oil flows into the vaporization pipe 2 because since a rod-shaped body 13 made of qualtz glass or the like hardly expands, the pressure contact force of a needle valve 15 with respect to a valve seat 16 becomes weak. Accordingly, the kerosene oil is vaporized instantly and is supplied to the combustion port 19 while the check valve 9 is closed due to the pressure of the vaporized gas filling the valve so that the liquefied gas is prevented from flowing into the combustion port 19 and the combustion of the burner with the kerosene oil is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to gas non-engineers that use safe and relatively inexpensive liquid fuels, such as light oils with high decomposition temperatures, such as kerosene, and in particular to welding materials for road markings. There is one device suitable for use in a heating device mounted on a moving vehicle, such as a melting pot or an asphalt heating field for road paving.

As a heating device for the above-mentioned movable pot, conventionally, Zorono e
Normally, liquefied natural gas such as gas is used alone, but professional and e gas are expensive and
It has the disadvantage of requiring a large number of units and the hassle of replacing them. In contrast, the present invention uses liquefied gas such as proton gas only at the time of ignition, and thereafter uses liquid fuel such as kerosene, and the switching is automatically performed.

Embodiments of this invention will be described with reference to the drawings. 1 is a combustor consisting of a combustion tube forming a /9-ner; 2 is a vaporizer provided above the combustor and between a required heated object. It is a vaporizing member made of a pipe, and its base end is connected to a kerosene tank 4 through a nozzle valve 3.An air tank 6 and a manual insiff are attached to this kerosene tank through a regulating valve 5. In addition, a check valve 9 and a Norp lO1 pressure regulating valve 1 are connected to a branch pipe 8.
1 to a liquefied gas pump 12.

The vaporizing tube 2 is made of stainless steel and is internal.

A rod 13 made of quartz glass or the like is fixed at one end (the right end in the figure), and the other end presses a needle valve 15 against a valve seat 16 via a spring 14. This valve seat 16 is screwed into the vaporizing pipe 2, and its mounting position can be adjusted back and forth via a neck thread. One end of the vaporizer tube 2 is opened as a pentier nozzle 17 into the pentier 18 of the combustion tube 1 to direct combustion gas to the combustion port 1 of the combustion tube 1.
It starts gushing from 9 onwards.

To use this, first operate the manual 47zo 7 like a normal torch lamp etc. and put 5-/- into the air tank 6.
Blow compressed air into the kerosene tank to a level of 1~3-/d.
Add a pumping force of .

Next, the pressure regulating valve 11 is opened, and the liquefied gas is heated to the minimum pressure for heating the combustion tube 1, for example, 0.51Cf/j''+4 vaporization tube 2.
From there, it is sent through the Pentieri nozzle 17 into the combustion tube l, and the combustion port 19 is ignited to heat the vaporization tube 2.

Next, open the lube 3 (and open the vaporizer tube 2 due to the above heating).
Since the rod 13 hardly expands with respect to the thermal expansion of , the pressing force of the needle valve 15 against the valve seat 16 is weakened.
Therefore, kerosene flows into the vaporizing pipe 2 and is vaporized. This vaporized kerosene is injected into the combustion tube 1 from the venturi nozzle 17, mixed with primary air sucked from the pentieri 18, and ejected from the combustion port 19 to obtain secondary air and continue combustion. On the other hand, the check valve 9 connected to the vaporization pipe 2 is closed by the pressure inside the vaporization pipe 2, and stops the flow of liquefied gas. In this state, when the vaporizer tube 2 is heated to a predetermined temperature or higher, the amount of boiling and vaporized kerosene in the vaporizer tube 2 increases significantly, and with this increase in internal pressure, the needle valve 15 is pressed against the valve seat 16. It began to operate as a check valve,
The inflow of the kerosene is suppressed.

As described above, this invention provides initial heating for fuel vaporization in a gas burner using liquid fuel to a combustion tube.
In addition to supplying gas fuel to itself, a valve mechanism that opens and closes based on the difference in thermal expansion is inserted in the vaporizing pipe, which is the vaporizing mechanism, to automatically switch fuel and adjust the amount of fuel. In this case, the vaporizing pipe 2 is located close to the combustion tube 1 and has a relatively small diameter, and the kerosene is pumped by l instead of pressurizing the compressed air f tank.
Pressurize using pressure relief valve! A method of adjusting the pressure may also be used.

[Brief explanation of the drawing]

The drawings are explanatory sectional views showing embodiments of the invention. Symbols in the figure: 1... Combustion tube 2... Vaporizer tube 4... Kerosene tank 9... Check valve 12... Liquefied gas zenpe 13... Rod body 14... Spring 15
...Needle valve 16...Valve seat 17...Pentier nozzle 19...Combustion port (3 others)

Claims (1)

[Claims] Above a horizontal combustor with combustion ports arranged in a row on its upper surface, vaporizing members are arranged in parallel at slight intervals, and a gas fuel inlet is provided at an arbitrary point on the vaporizing member via a check valve. , and the liquid fuel inlet, which is normally closed and opened and closed by an on-off valve that opens as the temperature rises, are opened, and two pliers nozzles are connected to the vaporizing member, and the tip of the armpit nozzle is as described above. A gas nozzle characterized by having one end facing inside the combustor.