JPH0688610A - Multiple combustion cylinder burner - Google Patents

Abstract

PURPOSE:To achieve stability in ignition performance by providing a plurality of combustion cylinders which form a combustion group and each of which is held on a plate placed halfway up a flame, above an opening formed in the plate, and has an opening at the lower part of the side and at a position facing an adjacent combustion cylinder and by providing also a communicating lid which has the shape of an inverted U in cross section and connects two adjacent openings in the sides of the combustion cylinders. CONSTITUTION:In a plate packing 4 circular openings are formed and each two adjacent circular openings are connected by a linear opening. Similarly in a dividing plate 6 circular openings 6a are formed and each two adjacent circular openings are connected through a linear opening 6b. At the lower part of the side of each of combustion cylinders 9a, 9b, 9c an opening having the shape of an inverted U is formed at a position facing an adjacent combustion cylinder. A communicating lid 10 is attached to the combustion cylinders and dividing plate in a manner of closing each linear opening 6b from above. Fuel mixture jetted from a flame hole 5a is ejected through the circular openings 6a and the linear openings 6b according to their shapes; ignition by an ignition plug makes the ignition instantly spread and starts the combustion; a flame is formed according to the openings in the dividing plate 6 and maintains normal combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-combustion cylinder burner having a plurality of combustion cylinders, and more particularly to a multi-combustion cylinder burner with improved transfer of heat during ignition.

[0002]

2. Description of the Related Art A conventional multiple combustion cylinder burner will be described with reference to FIGS. FIG. 1 is a diagram showing an embodiment of the present invention. However, as shown in FIGS. 4 and 5, only a part is different. Therefore, only the main parts will be described with reference to FIGS. 4 and 5, and other parts will be described with reference to FIG. .

Reference numeral 1 denotes a fuel injection nozzle, from which a fuel supply device (not shown) turns the fuel into a gas and injects it from the fuel injection nozzle 1 at an appropriate speed. Reference numeral 2 is a burner cover, and the burner cover 2 forms a mixing tube 3 and a mixing chamber 8 communicating with the mixing tube 3. A burner head 5 is attached to the upper opening of the mixing chamber 8. And burner head
A division plate 17 is attached to 5 via a plate packing 16. 7 is a burner cover packing,
Dividing plate 17, plate packing 16, burner head 5
Are held in a sandwich form.

The burner head 5 has innumerable small holes, that is, flame holes 5a as shown in the drawing. The dividing plate 17 is provided with three openings so as to divide the flame hole 5a into three. Further, the plate packing 16 is a plate-shaped packing having independent openings having substantially the same shape as the split plate 17. Here, 18a, 18b, and 18c are three cylindrical combustion tubes attached to the circular openings of the division plate 17, respectively. Each combustion cylinder 18a, 18b,
A small hole is opened below the side surface of the adjacent side of 18c, and a communication pipe 20 is attached so that the adjacent combustion cylinders communicate with each other through the small hole.

An annular throttle ring 19 is attached above the combustion cylinders 18b and 18c. 13 is a combustion chamber cover, and on both side surfaces of this combustion chamber cover 13,
The spark plug 11 and the flame sensor 12 are attached so as to face the inside of each of the combustion cylinder c and the combustion cylinder a.
Reference numeral 14 is a heat exchanger, and 15 is a combustion chamber.

Next, the operation of the conventional multiple combustion cylinder burner will be described. When the gaseous fuel pumped from the fuel supply device (not shown) is injected from the injection nozzle 1 at an appropriate speed, the Venturi effect sucks combustion air from its surroundings as shown by arrow A, and the mixing chamber 3 When it passes, it is mixed moderately and becomes a mixed gas, which is introduced into the mixing chamber 8 as shown by the chain line arrow, and is uniformly accumulated at a constant pressure and is ejected from the flame hole 5a. Then, by an electric discharge previously formed at the tip of the ignition plug 11 by an ignition device (not shown), ignition is first performed in the combustion cylinder 18c to start combustion.

When the combustion cylinder 18c starts combustion, the internal pressure in the combustion cylinder 18c momentarily rises at the time of ignition, but the expansion ring 19 partially blocks the expansion to the upper side, that is, the combustion chamber 15 side, and the combustion A part of the flame momentarily the communication pipe
The flame holes in the combustion tube 18b
Ignite the mixed gas injected from 5a. Similarly, the ignition is transferred from the inside of the combustion cylinder 18b to the combustion cylinder 18a, and the combustion cylinder 18a
When the internal combustion is continued, the flame sensor 12 detects this and the combustion state becomes normal.

[0008]

However, the above-mentioned conventional multiple combustion cylinder burner has the following problems. That is, the quality of ignition greatly depends on the shape of the communication pipe. That is, the inner diameter should be as large as possible (at least 5 mm inner diameter) and the length should be as short as possible (15 m).
m or less). Therefore, there are restrictions on the shape of the burner. Requires aperture ring. It is necessary to give sufficient consideration to the adverse effects on combustion and heat resistance of the throttle ring. The range of stable ignition changes depending on the internal pressure of the mixing chamber. The flame moves in the communication pipe only when the pressure in the combustion cylinder suddenly rises at the time of ignition, and during normal combustion, for example, the combustion cylinder 18
Even if the inside of b extinguishes for some reason, it will not reignite,
As long as combustion continues in the combustion cylinder 18a, there is a risk that the abnormal state may continue without detecting misfire. The present invention was devised in view of the above circumstances, and an object thereof is to provide a novel multiple combustion cylinder burner capable of solving the above problems.

[0009]

A multi-combustion cylinder burner according to the present invention comprises a mixing chamber for properly mixing fuel and combustion air supplied from a fuel supply device and a combustion air supply device, and a burner head for combustion. , A division plate installed on the burner head with an appropriate number, number and shape of openings to divide the combustion flame, and a division of combustion flames held inside the division plate and divided combustion flame group inside. A plurality of combustion cylinders to be formed are provided, and a cutout is formed so as to open the lower part of the adjacent side of each combustion cylinder, and an inverted U-shaped communication lid is provided for communicating each cutout portion. It is characterized by that.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of a multi-combustion cylinder burner according to the present invention, and FIGS. 2 and 3 are exploded perspective views of essential parts. The same parts as those in the prior art are denoted by the same reference numerals, and the description of the parts described in the prior art is omitted.

The plate packing 4 has a circular opening as shown. Unlike the conventional plate packing 16 (the conventional one is independent), this circular opening is provided with a notch, that is, a linear opening, which communicates between the openings.
Furthermore, the dividing plate 6 is also different from the conventional one. That is, the split plate 6 has three circular openings.
A linear opening 6b is provided so as to communicate with the adjacent circular openings 6a in addition to 6a. A gap of 2 to 3 mm is sufficient. The combustion cylinders 9a, 9b, 9c are provided with an inverted U-shaped opening at the bottom of the side surface adjacent to each combustion cylinder as shown in FIG. A communication lid 10 is attached to the split plate.

Next, the operation of the multiple combustion cylinder burner according to the present invention will be described. The mixed gas injected from the flame holes 5a is ejected according to the shapes of the openings of the plate packing 4 and the division plate 6, that is, the circular openings 6a and the linear openings 6b. And it is ignited by the spark plug 11,
Instantly, the ignition combustion spreads from the right side to the left side in FIG. 1 to form a flame through the opening of the split plate 6, and the normal combustion is continued. It should be noted that the ejection of the mixed gas from the linear opening 6b may be the minimum necessary, and in the prototype specifically made by the inventor, the gap of the linear opening 6b was 2 mm, and the height of the communicating pipe was 5 mm. . However, the present invention is not limited to the dimensions. Further, the number of combustion cylinders and their shapes are not limited.

[0013]

As described above, in the multi-combustion cylinder burner of the present invention, the above-described linear opening is formed in the plate packing and the split plate. Therefore, stable ignition performance can be obtained without being influenced by the shapes of the linear opening and the communication lid. It also does not require additional components that would otherwise adversely affect it. Further, since the flame holes are continuously formed, even if a partial fire occurs in the middle part, if the mixed gas is ejected again, the partial reignition can be easily and smoothly performed. It is also possible to obtain stable ignition performance even if the internal pressure of the mixing chamber changes.

[Brief description of drawings]

FIG. 1 is a drawing according to the present invention, which is a vertical cross-sectional view showing one embodiment of a multiple combustion cylinder burner.

FIG. 2 is a perspective view of a main part of the drawing according to the present invention.

FIG. 3 is an exploded perspective view of a main part of the drawing according to the present invention.

FIG. 4 is a vertical cross-sectional view of a main part, which is a drawing according to a conventional technique.

FIG. 5 is a drawing related to the prior art and is an exploded perspective view of a multiple combustion cylinder burner.

[Explanation of symbols]

 1 Fuel injection nozzle 2 Burner cover 3 Mixing pipe 4 Plate packing 5 Burner head 6 Split plate 7 Burner cover Pankin 8 Mixing chamber 9a, 9b, 9c Combustion cylinder 10 Communication lid 11 Spark plug 12 Flame sensor 13 Combustion chamber cover 14 Heat exchanger 15 Combustion chamber

Claims (1)

[Claims] 1. A mixing chamber for appropriately mixing fuel and combustion air supplied from a fuel supply device and a combustion air supply device, a burner head for combustion, an appropriate position mounted on the burner head, and a number. , With the opening of the shape,
A split plate for splitting the combustion flame, and a plurality of combustion tubes that are held on the openings of the split plates and that internally form a split combustion group are provided. A multi-combustion cylinder burner, which is provided with a notch so as to open and an inverted U-shaped communication lid for communicating the respective notches.