JP2546920Y2 - Liquid fuel combustor ignition system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an ignition device for a core-vertical liquid fuel combustor, and more particularly to a core without adjusting a gap between a combustion core and an ignition heater filament for igniting the same. The present invention relates to an ignition device for igniting a device.

<Prior Art> As shown in the schematic diagram of the igniter shown in FIG. 10, a conventional igniter has a core outer cylinder 2 covering a side surface of a combustion wick 1 so that a gap d with respect to the combustion wick 1 can be adjusted. An ignition heater 4 swingably supported by the upper end 2a and an adjusting mechanism 6 for holding the ignition heater 4 in the core outer cylinder 2 and adjusting a gap with the combustion core 1 are provided. The adjustment mechanism 6 is provided with an ignition adjuster 7 for rotating the lower end of the ignition heater 4, and the ignition adjuster 7 is supported on an ignition base 9 so as to be swingable about a horizontal axis 7 a.

Then, the adjusting screw 8 is connected to the ignition base 9 and the ignition adjuster 7.
When the ignition adjuster 7 is rotated by a driver or the like so as to reduce the distance from the ignition base 9, the horizontal axis 7a provided on the ignition base 9
Is rotated upward so as to draw an arc against the spring 10 about the center.

The upper end of the core outer cylinder 2 is rotated by the rotational movement of the ignition adjuster 7.
The ignition heater 4 also rotates around the fulcrum 2a, and the tip end heating portion 4a of the ignition heater 4 is inclined in a direction approaching the combustion core 1.

Conversely, when the gap d between the ignition heater 4 and the combustion core 1 is to be increased, the adjustment screw 8
By turning in the opposite direction. In addition, 3 in the figure
Is a core inner cylinder.

<Problems to be Solved by the Invention> The above-described prior art has the following problems.

That is, since the distance d between the core 1 and the filament 4a of the ignition heater 2 needs to be about 1 mm as shown in FIG. 8, a skilled man who operates the adjusting screw 8 to set the distance d to 1 mm. Strict checks with the operator or expensive automatic adjusters are required.

Further, the distance d between the core 1 and the ignition heater filament 4a
Even if is set to 1 mm, if the core 1 is deformed by an external force, the set value of 1 mm will change.

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to provide an ignition device for a liquid fuel combustor which can omit adjustment of a distance between a combustion core and a heater filament.

<Means for Solving the Problems> As shown in FIGS. 1 to 8, the problem solving means according to the present invention protrudes upward with a gap between the core inner cylinder 16 and the core outer cylinder 12. In the ignition device for a liquid fuel combustor that ignites an exposed portion of the wick 11 to burn liquid fuel, an ignition heater 14 is provided at a position corresponding to the exposed portion of the wick 11,
The core 11 is located at a position facing the ignition heater 14 on a part of the shoulder outer periphery.
Convex portion 17 for moving core 11 outward with upward movement of
Is formed.

<Operation> In the above means for solving the problems, at the time of the ignition operation, the core inner cylinder is provided.
16, the combustion wick 11 rises along the core outer cylinder 12, but at this time, since the projection 17 is formed on the upper side surface of the core inner cylinder 16, the projection becomes At 17, it is extruded in the outer peripheral direction.

Therefore, the combustion wick 11 approaches the ignition heater 14 to obtain an appropriate gap value between the combustion wick 11 and the filament 22 of the ignition heater 14, and furthermore, the combustion wick 11, the core inner cylinder 16 and the core outer cylinder 12
A gap through which air necessary for ignition flows is ensured between the two, and stable ignition characteristics can be obtained without any prior adjustment.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of an ignition device showing an embodiment of the present invention, FIG. 2 is a perspective view of a core inner cylinder, FIG. 3 is a perspective view showing an attached state of the ignition device, and FIG. FIG. 4 is an exploded perspective view of the ignition device, FIG. 5 is a front view of the ignition heater, FIG. 6 is a side view of the ignition heater, and FIG. 7 is a plan view of the ignition heater.

As shown in the figure, the ignition device of the present invention is inserted into a mounting hole 13 of a core outer cylinder 12 that covers a side surface of a combustion core 11, and the combustion core 11 is inserted into the core outer cylinder 12.
And a holding mechanism 15 for holding the ignition heater 14 to the core outer cylinder 12.

The combustion wick 11 has a cylindrical shape, and has a cylindrical metal fitting 11 therein for improving the ascending and descending properties.
a is attached and configured to move up and down between the core inner cylinder 16 and the core outer cylinder 12 by a core lifting device (not shown).

The core inner cylinder 16 is provided with a core top 16b having a large number of through holes 16a at its upper end. At the shoulder of the core inner cylinder 16, a convex portion for moving the core 11 toward the ignition heater 14 with the upward movement of the core 11 at a position facing the ignition heater 14.
17 are formed.

As shown in FIGS. 1 and 3, the core outer cylinder 12 has an upper portion 12a having a slightly large diameter, and an outer peripheral flange 18 having a substantially L-shaped cross section is formed by bending around the entire upper end of the large diameter upper portion 12a. .

In addition, the lower part 12b of the core outer cylinder 12 is also horizontally bent outward,
It is fixed to the upper surface of a combustion tank (not shown). The mounting hole 13 of the ignition heater 14 is
Is formed in the horizontal portion.

As shown in FIGS. 5 and 6, the ignition heater 14 includes a pair of electrode rods 2.
It comprises a heat-resistant and insulative heater main body 21 made of a substantially Y-shaped ceramic or the like in which 0 is incorporated, and a coil-shaped heater filament 22 extended between the electrode rods 20.

A step 27 is provided at the center of the core side surface of the ignition heater body 21.
The step 27 is engaged with the lower end wall 13a of the mounting hole 13.

Notches 30 are formed on the left and right sides of the center of the ignition heater main body 21 to engage the left and right protruding pieces 29a of the pressing piece 29 of the ignition socket 28 of the holding mechanism 15.

The lower end 20a of the electrode rod 20 is exposed to the rear of the core outer cylinder 12 (the side away from the combustion core 11), and can be electrically contacted with the vertical portion 33a of the ignition tab 33 of the holding mechanism 15. You.

 Next, the holding mechanism 15 shown in FIG. 4 will be described.

As shown in FIG. 4, the ignition tab 33 is formed by bending a vertical portion 33a and a horizontal portion 33b into an L-shape.
Are fixed to the horizontal support portion 35a of the substantially L-shaped insulator 35.
In the vertical portion 35b of the insulator 35, the front lower end of the ignition heater 14 is prevented from moving toward the core outer cylinder 12, and the lower end portion of the ignition heater 14 is interposed between the vertical portion 33a of the ignition tab 33 and the vertical portion 33a. Clamping tab 3
6 is fixed.

The insulator 35 is supported by an ignition base 37 fixed to the lower portion 12b of the core outer cylinder 12. An elastic ignition socket 28 for pressing the rear surface 21b of the heater body 21 toward the core is fixed to the ignition base 37.

As shown in FIG. 4, the ignition base 37 has a substantially U-shape that is open downward from an upper plate 38 on which the insulator 35 is mounted and fixed, and a pair of leg plates 39 formed at both ends of the upper plate 38. It is formed in. A lower piece 41 with a screw hole 40 is horizontally bent at the lower end of the leg plate 39, and the lower piece 41 is screwed to a lower portion 12 b of the core outer cylinder 12.

In the ignition socket 28, a square hole 46 is formed at the center thereof, and a pressing piece 29 for pressing the ignition heater 14 is protruded toward the core at the upper end of the square hole 46. Protruding pieces 29a are formed on both left and right ends of the pressing piece 29, and the pressing piece 29 and the protruding piece 29a form a U-shape in plan view. The pressing piece 29 is connected to the ignition heater 14.
The position is set so as to press the lower part than the stepped part 27 of the core outer cylinder 12, and the ignition heater 14 is pressed by the pressing piece 29 on the large diameter upper part of the core outer cylinder 12.
Press to 12a.

At the lower end of the ignition socket 28, a leg-shaped leg 48 is formed, and the leg 48 is fixed to the ignition base 37 by a screw 42. The ignition base 37, the ignition socket 28, the insulator 3
5. The holding mechanism 15 is constituted by the ignition tab 33.

In FIG. 7, reference numeral 50 denotes an ignition tape coated on the combustion core 11.

In the above configuration, the ignition heater 14 is, as shown in FIG.
It is inserted through the mounting hole 13 of the core outer cylinder 12 and its lower end is inserted between the stop piece 36 of the insulator 35 and the vertical piece 33a of the ignition tab 33. Then, the lower end 20a of the electrode rod 20 of the ignition heater 14 comes into contact with the ignition tab 33 and becomes conductive, and the ignition heater 14
Face to face.

In this state, when the ignition operation is to be performed,
To protrude from the gap between the core inner cylinder 16 and the core outer cylinder 12.

When the core 11 rises, the upper end surface of the metal core 11 a hits the protrusion 17 on the upper side surface of the core inner cylinder 16, and the entire core 11 falls outward and approaches the ignition heater 14. At this time, the ignition heater 14 is already energized, and is ignited when the wick 11 rises, and the entire device performs a burning operation.

It should be noted that the present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention.

For example, in the above embodiment, the protrusion 17
However, the same effect can be obtained by forming a convex portion 17 by extending a part of the outer periphery of the core 16b as shown in FIG.

Further, the holding mechanism for supporting the ignition heater is not limited to the above embodiment.

<Effects of the Invention> As is apparent from the above description, according to the present invention, the ignition heater is provided at a position corresponding to the exposed portion of the core, and the position facing the ignition heater at a part of the outer periphery of the shoulder portion of the core inner cylinder. A projection is formed to move the wick outward as the wick moves upward, so the combustion wick hits the projection when it rises, and a part of it is pushed outward to approach the ignition heater. The appropriate value of the gap between the combustion wick and the filament of the ignition heater can be obtained, and the air flows through the gap between the cylinders on both sides of the combustion wick, so that stable ignition can be performed without any prior adjustment. Characteristics are obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of an ignition device showing an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view of the core inner cylinder, FIG. 3 is a perspective view showing an attached state of the ignition device, FIG. 4 is an exploded perspective view of the ignition device, and FIG.
Fig. 6 is a front view of the ignition heater, Fig. 6 is a side view of the ignition heater, Figs. 7 and 8 are plan views of the ignition heater, and Fig. 9 is another embodiment of the present invention. FIG. 10 is a sectional view of a conventional ignition device. 11: combustion core, 12: core outer cylinder, 13: mounting hole, 14: ignition heater, 1
5: holding mechanism, 16: core inner cylinder, 17: convex, 20: electrode rod, 21: heater body, 22: heater filament, 26: holding piece, 27: step, 28: ignition socket, 29: pressing piece , 30: notch, 33: ignition tab, 35: insulator, 37: ignition base.

Claims (1)

(57) [Scope of request for utility model registration] 1. A liquid fuel combustor igniter for burning a liquid fuel by igniting an exposed portion of a projected core by moving upward with a gap between a core inner cylinder and a core outer cylinder. An ignition heater is provided at a position corresponding to the exposed portion of the core, and a convex portion for moving the core outward with the upward movement of the core at a position facing the ignition heater at a part of the outer periphery of the shoulder portion of the core inner cylinder. An ignition device for a liquid fuel combustor, characterized in that: