JPS6155508A - Burner ignition fuel cutoff device - Google Patents

Abstract

PURPOSE:To perform correctely adjustment of opening aperture of a fuel nozzle by a method wherein a shape memory alloy, capable of actuating to closs the nozzle upon reaching a high temperature, is provided. CONSTITUTION:When the temperature of an evaporating cylinder 2 rises up to the given level, being heated by the burning flame of ignition fuel, the shape memory alloy ring 4, enclosing around the evaporating cylinder 2, deformes due to the raised temperature, subsequently, the respective nozzles 3, being arranged on the all surrounding surface of the evaporator, are closed uniformly by its actuation, thereby jetting fuel volume from the nozzles 3 are controlled by the nozzle either in throttled position or in complete stopped one, which eliminates jetting fuel for a long time, and therefore, the stabilized burning flame of blue color is obtainable in a shorter time from its starting fire. By use of this device, it is possible to minimize the amount of carbon generation and to perform a correct burning adjustment accordingly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a burner ignition fuel cutoff device, and can be used in a dryer for drying grain, etc.

Problems to be Solved by the Invention In a burner that burns vaporized fuel vaporized in a central vaporization cylinder while jetting it out from a combustion part located on the outer periphery of the vaporization cylinder, it is necessary to The hole is left open at the beginning of combustion, and as normal combustion conditions are reached, the opening of this nozzle hole is narrowed or closed, thereby restricting or stopping the fuel ejected from this nozzle hole for combustion. Ideally, the efficiency should be increased, but since this fuel injection hole is formed on the outer periphery of the vaporization cylinder and is arranged over the large diameter circumference, the opening degree of this fuel injection hole is It is difficult to accurately adjust or fully close the entire circumference.

Means for Solving the Problem The present invention provides a vaporization tube (2) which guides the fuel to the combustion disk (1) while vaporizing it, at the part of the fuel injection hole (3) on the outer periphery of the vaporization tube (2). 2) to form a ring shape surrounding the nozzle hole (3) and fit into the nozzle hole (3), and deform due to temperature changes in the vaporizing tube (2) and close the nozzle hole (3) when the temperature rises. The structure of the burner ignition fuel cutoff device is provided with a working memory alloy ring (4).

Functions and Effects of the Invention The fuel supplied into the carburetor (2) is
The fuel is ejected from the injection hole (3), the ejected fuel is ignited, combustion starts, the combustion flame heats the vaporization tube (2), and the combustion disk (1) is heated from inside the vaporization tube (2). While the fuel is being guided and supplied to the combustion chamber, the fuel is vaporized, and this vaporized fuel is ejected from the combustion plate (1) and burned, but the vaporization cylinder (2) is heated by the combustion flame of the young man. When the temperature rises above a certain level, the ring-shaped ring (4) surrounding the vaporization tube (2) is deformed by the increased temperature of the vaporization tube (2), and the ring (4) is disposed around the entire circumference. This works to evenly close each of the nozzle holes (3) provided, and the amount of liquid fuel spouted from the nozzle holes (3) is throttled or stopped. Since the combustion flame is not ejected over a long period of time, the normal combustion flame color becomes blue in a short time after ignition, and no carbon is generated. Therefore, accurate combustion adjustment can be performed and the configuration can be simplified.

Embodiment In the illustrated example, the dryer (5) has a bar (6) at the front.
), an operation hook (7), a grain raising machine (8), etc., a blower (9), etc. at the rear, a drying room, a storage room, etc. inside, and a burner case (10). The burner (6) is mounted on a support plate (11) fixed to the bottom of the dryer, and this eight-na case (10) is removably mounted on the front of the dryer (5), (6) By sucking the hot air generated by the exhaust fan (9) at the rear, the hot air crosses the drying chamber, and the grains flowing down the drying chamber are dried.

The /Hena (6) has a cylindrical blower tube (12) at the rear for blowing combustion air, and a motor (13) for rotationally driving the vaporizer tube (2) is installed inside the blower tube (12). I am wearing it. A combustion tube (14) is fixed to the front part of the blower tube (12),
This combustion tube (14) is shaped like a three-tiered dish (I!1) and has an opening in the center, and a cylindrical guide tube (15) with an open tip is fixed to this opening. The outer periphery of the cylinder (15) has a combustion disk (1) having an ejection hole for ejecting vaporized fuel, and an ignition heater (16) for igniting the ejected fuel is further provided on the outer periphery, and the motor (13) At the shaft end, there is a scattering body (17) that rotates and scatters in response to the fuel supplied facing the tip of the guide tube (15), and the vaporizer tube (2) along the outer periphery of the guide tube (15). ) and attach this vaporizer cylinder (2).
is shaped like a pot, and its mouth edge is bent toward the outer periphery, and the vaporization disc (18) is fixed to this mouth edge.
18) and the mouth edge of the carburetor cylinder (2), and the front edge side of the carburetor plate (ta) is diagonally forward and outward. The diameter is expanded to form a conical shape in the opposite direction to that of the vaporizing tube (2), and a ring (4) is fitted and inserted into the outer diameter root of the vaporizing tube (2), and this ring (4) is resistant to temperature changes. The ring (4) is made of a shape memory alloy that deforms its shape due to the temperature of the vaporizer tube (2).
) expands and deforms to close the nozzle hole (3), opening or restricting the fuel jet, and when the temperature of the vaporization cylinder (2) falls to the original temperature, the ring (4) The ring (4) has a structure in which it is restored to its original shape and the opening or opening degree of the jet hole (3) is increased.
) is fixed to the vaporizing cylinder (2) to prevent it from coming off. There is a certain gap between the outer diameter part of the guide tube (I5) and the inner diameter part of the vaporization tube (2), so that the vaporized fuel can flow into the combustion disk (
1), and there is a certain gap between the inclined part of the combustion disk (1) and the inclined part of the vaporization disk (18), so that the vaporized fuel becomes a combustion flame. It is configured to gush out.

Combustion air is supplied from the blower (20) provided on the outside of the bottom of the burner case (10) through the blower duct (
12) It is configured to blow air inward.

Combustion fuel is supplied from a fuel tank (21) installed at the front of the dryer (5) through a supply pipe, a combustion pump, and a fuel nozzle (22) extending above the scattering body (17). After that, the particles are ejected onto the outer periphery of the flying object (17).

By operating the operation box (7) at the front of the dryer (5),
At the same time as this dryer (5) starts, /<-su (6)
The ignition heater (I8) is energized, and this ignition heater (1
6) becomes red hot, and the combustion fuel flows from the fuel tank (21) through the fuel pump etc. to the fuel nozzle (22).
) is supplied to the outer circumferential part, and this flying body (17) causes the fuel to fly to the inner wall of the vaporizer cylinder (2), and while flowing down the inner wall of the vaporizer cylinder (2), it is ejected from the nozzle hole (3). A part of this ejected liquid fuel scatters onto the red-hot ignition heater (16), automatically ignites and starts combustion, and this burning flame heats the vaporization cylinder (2). (2) The fuel flowing down inside is vaporized, and this vaporized fuel is between the injection hole of the combustion disk (1), the inclined part of this combustion disk (1), and the inclined part of the vaporization disk (18). A combustion flame is ejected through the gap formed, and this combustion flame becomes hot air, which is sucked in by the exhaust air (9) at the rear of the dryer (5) and cross-ventilates the drying room.
The grains housed in this dryer (5) are exposed to this hot air and dried while flowing down this drying chamber, and when the grains reach a specified moisture content, the operation box (7) automatically controls the drying process. The dryer (5) is automatically stopped, but when the vaporizer tube (2) is heated by the combustion flame during automatic ignition of this drying operation and rises above a certain temperature, the ring (4) stretches and deforms. Since the ring (4) moves one step to close the nozzle hole (3) for ejecting fuel, the liquid fuel' is adjusted to an appropriate amount and burns in a stable state from the initial stage of ignition.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an enlarged side sectional view, FIG. 2 is an enlarged rear view, and FIG. 3 is a partially cutaway side view of the dryer. In the figure, reference numeral (1) indicates a combustion disk, (2) a carburetor tube, (3) a nozzle hole, and (4) a ring.

Claims (1)

[Claims] A vaporizing cylinder (
2) Form a ring shape surrounding the vaporization tube (2) at the part of the fuel injection hole (3) on the outer periphery so that the ring shape fits into the injection hole (3) and the vaporization tube ( 2) A burner ignition fuel cutoff device comprising a memory alloy ring (4) that deforms due to temperature changes and closes the nozzle hole (3) when the temperature reaches a high temperature.