JPH05149518A - Gas burner of gas burning equipment - Google Patents

Abstract

PURPOSE:To make it possible to eject stabilized mixed gases and prevent the generation of back fire. CONSTITUTION:A ring-shaped mounting member 23 is fixed with the end of a side plate 20 laid out inside an outer cylinder 22 with a welding means. A bottom plate 24 and a mixing chamber formation member 25 are fixed with the ring-shaped mounting member 23 by way of a fixing fitting. It is, therefore, possible to protect the bottom plate 24 from being curved as a result of thermal strain.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner device for a gas combustor, which enables stable ejection of mixed gas and prevents the occurrence of flashback.

[0002]

2. Description of the Related Art For example, as shown in FIG. 2, a gas combustor used in a refrigerant heating type refrigeration cycle is provided with a heat exchanger 2 provided with fins 1 and outside the heat exchanger 2. It is configured to have a refrigerant pipe 3 and a cylindrical type burner device 4 connected to one end side of the heat exchanger 2. The cylindrical type burner device 4 has a burner portion 5, an outer cylinder 6 surrounding the burner portion 5, and a fan device 7 attached to an end portion of the outer cylinder 6, and the burner portion 5 is A side plate 8 arranged concentrically with the outer cylinder 6 to form an inner cylinder, a bottom plate 9 fixed to one end of the side plate 8, a mixing chamber forming member 10 attached to the bottom plate 9, and a mixing chamber forming member. 10
A gas injection nozzle 11 for supplying a fuel gas to a mixing chamber formed inside is provided, and the side plate 8 and the bottom plate 9 are fixed to each other by ordinary welding means.

Thus, the fuel gas injected from the gas injection nozzle 11 into the mixing chamber is mixed with the primary air forced by the fan unit 7, and the mixed fuel of the fuel gas and the air mixed in the mixing chamber is burned. It is ignited by an ignition device (not shown) provided at an appropriate position in the chamber, and then burned by secondary air introduced into a combustion chamber formed in the side plate 8. In this way, the combustion gas burned in the burner section 5 is guided to the heat exchanger 2, and in this heat exchanger 2, the combustion gas flows in the direction indicated by the arrow, and the heat exchanger 2
Heat is exchanged with the refrigerant flowing through the refrigerant pipe 3 via the fins 1 provided in the, and the refrigerant flowing through the refrigerant pipe 3 is heated. Then, the heat-exchanged combustion gas is exhausted as exhaust gas to the outside through the exhaust port 12 provided in the heat exchanger 2.

[0004]

In the burner device for a gas combustor of the type described above, since the side plate forming the inner cylinder and the bottom plate fixed to one end of this side plate are fixed to each other by welding means, during welding, , The bottom plate receives welding heat and undergoes thermal distortion,
The bottom plate is joined to the side plate while being curved inward, and the bottom plate is curved inward to the side plate, which adversely affects the mixed fuel of the fuel gas and air injected into the combustion chamber, and the combustion of the mixed fuel. It may deteriorate the fire and extinguish the fire by flashback. Further, when the side plate and the bottom plate are welded, it is necessary to form the side plate and the bottom plate with the same material, and there is a drawback that the molding material is limited. The present invention has been made in view of the above points, and provides a burner device for a gas combustor, which prevents distortion of the bottom plate, enables stable ejection of a mixed gas, and prevents the occurrence of flashback. With the goal.

[0005]

In the burner device for a gas combustor of the present invention, an annular mounting member is fixed to an end portion of a side plate disposed inside the outer cylinder by welding means, and the annular mounting member is provided with: It is characterized in that the burner portion is formed by fixing the bottom plate and the mixing chamber forming member via a fixture.

[0006]

In the burner device for a gas combustor according to the present invention, the bottom plate is fixed to the side plate by being fixed to the annular mounting member welded to the end portion of the side plate. Therefore, it is not necessary to fix the bottom plate to the side plate by the welding means. Since the bottom plate does not bend due to thermal strain, the bottom plate maintains a predetermined shape, thus allowing stable ejection of the mixed gas, and by not welding the bottom plate directly to the side plate, the bottom plate and the side plate are dissimilar. It can be molded with materials, and the application range of the bottom plate can be widened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a burner portion of a burner device for a gas combustor according to the present invention, in which a cylindrical side plate 20 constituting the burner portion is
The end portion on the side closer to the heat exchanger is connected to the outer cylinder 2 via the flange 21.
It is fixed at 2. A plurality of openings are arranged in a row on the peripheral surface of the side plate 20, and secondary air is supplied to the combustion chamber 20 a formed inside the side plate 20 through the plurality of openings. A mounting member 23 having an annular overall shape is provided at an end of the side plate 20 opposite to the side where the flange 21 is provided. The mounting member 23 has an L-shaped cross section, is attached to the inner surface of the side plate 20 so that one side thereof extends inward in the radial direction, and is fixed to the side plate 20 by welding the joint ends to each other by welding means. A plurality of mounting screw holes are formed at intervals in the circumferential direction in the radially extending portion of the mounting member 23, and the bottom plate 24 and the mixing chamber are formed in the radially extending portion of the mounting member 23. The member 25 is attached. Openings are formed in the mixing chamber forming member 25 at positions corresponding to the plurality of screw holes provided in the mounting member 23, and the bottom plate 24 and the mixing chamber forming member 25 are
After the formed openings are superposed so as to coincide with each other, the openings are arranged on one surface of the mounting member 23 so as to correspond to the plurality of screw holes provided in the mounting member 23, and the bottom plate 24 and the mixing chamber forming member 25 are , Is integrally connected to the mounting member 23 by screwing a fixing tool such as a screw 26 into the screw hole. A fuel gas injection nozzle 27 is attached to the mixing chamber forming member 25 so that the fuel gas from the fuel gas injection nozzle 27 is supplied to the mixing chamber 25a. Further, an opening 28 is formed in a portion of the bottom plate 24 corresponding to the mixing chamber 25a, and the fuel gas mixed in the mixing chamber 25a is supplied to the combustion chamber 20a through the opening 28.

In order to assemble the burner portion of the burner device of the gas combustor, the side plate 20 is fitted with the outer cylinder 2 via the flange 21.
2, and a mounting member 23 is welded to the end of the side plate 20 opposite to the side where the flange 21 is provided.
3, the bottom plate 24 and the mixing chamber forming member 25 are arranged so that the openings provided in the bottom plate 24 and the mixing chamber forming member 25 are aligned with the mounting screw holes formed in the mounting member 23, and then the screws 26 are provided. The bottom plate 24 and the mixing chamber forming member 25 are screwed into the mounting screw holes of the mounting member 23 through the openings formed in the forming member 25 and the bottom plate 24 so that the bottom plate 24 and the mixing chamber forming member 25 are joined together.
It is done by fixing to 0.

Thus, the fuel gas injected from the gas injection nozzle 27 is mixed with the primary air in the mixing chamber 25a, and the mixed fuel mixed in the mixing chamber 25a passes through the opening 28 provided in the bottom plate 24 and the side plate 20. The secondary air is introduced into the combustion chamber 20a provided therein and is introduced into the combustion chamber 20a through the opening provided in the side plate 20 to be combusted.
Since the bottom plate 24 is fixed to the annular mounting member 23 welded to the end portion of the side plate 20, the bottom plate 24 does not bend due to thermal strain due to the welding means, and the bottom plate 24 maintains a predetermined shape. Therefore, stable ejection of the mixed gas becomes possible. The bottom plate and side plates can be molded from different materials by adopting a structure in which the bottom plate is not directly welded to the side plate, and the thickness and material of the bottom plate can be set to appropriate conditions as necessary, and the applicable range of the device Becomes wider.

[0010]

As described above, according to the present invention, the burner portion is formed by welding the annular mounting member to the end portion of the side plate and fixing the bottom plate and the mixing chamber forming member to the annular mounting member. Therefore, the bottom plate does not bend due to heat distortion due to welding, the ejection of the mixed gas is stable, the plate thickness and material of the bottom plate can be set to appropriate conditions as required, and the combustibility deteriorates. , It doesn't flash back and extinguish.

[Brief description of drawings]

FIG. 1 is a view showing a burner portion of a burner device for a gas combustor according to the present invention.

FIG. 2 is a diagram showing a burner device of a conventional gas combustor.

[Explanation of symbols]

 20 Side Plate 22 Outer Cylinder 23 Mounting Member 24 Bottom Plate 25 Mixing Chamber Forming Member 26 Screw

Claims (1)

[Claims] 1. An annular mounting member is fixed to an end portion of a side plate disposed inside an outer cylinder by welding means, and a bottom plate and a mixing chamber forming member are fixed to the annular mounting member via a fixing tool. A burner device for a gas combustor, wherein a burner portion is formed by.