JPH0125861Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a combustion device, and aims to prevent thermal expansion and at the same time prevent combustion air from leaking.

Conventionally, as shown in Fig. 2, a spray nozzle B is provided in the center of the burner body A, and combustion air is supplied from the surrounding flame port C to the fuel supplied to the center for combustion. Thermal expansion of the burner port C is absorbed by making the connection between the burner cylinder D and the burner body A, which form an air passage to the burner port C, slidable. However, in this case, combustion air leaked from the connection and had an adverse effect on combustion. Also, since the spray nozzle B is fixed to the burner body A via the back cover E, the combustion port F
The dimensions of the fuel were changed and the combustibility became unstable.

The present invention eliminates the above-mentioned conventional drawbacks, and will be explained below based on an embodiment shown in the drawings. 1
is a burner main body, the inside of which is a ventilation passage 2, and one side forms an opening into which a burner outer cylinder 3, which will be described later, is inserted, and a back cover, which will be described later, is slidably inserted into the opposite surface. An opening is formed. 3 is a burner outer cylinder whose peripheral surface is fixed to the burner body 1;
An air passage 5 communicating with the air passage 2 is formed on the inner periphery. Reference numeral 6 denotes a bottomed burner inner cylinder arranged inside the burner outer cylinder 3, the open end of which is connected and fixed to the burner outer cylinder 3, and the above-mentioned air passage 5 is provided between the burner outer cylinder 3 and the burner outer cylinder 3.
is formed. Reference numeral 4 designates a number of flame ports formed on the inner circumferential surface of the burner inner cylinder 6, and reference numeral 7 designates a combustion port provided at the center of the bottom of the burner inner cylinder 6. Reference numeral 8 denotes a bottomed cylindrical primary air cylinder whose bottom outer surface is fixed to the bottom outer surface of the burner inner cylinder 6, and an opening that overlaps with the combustion port 7 is provided in the center of the bottom. Reference numeral 9 denotes a bottomed cylindrical back cover whose bottom outer surface is fixed to the flange portion of the open end of the primary air cylinder 8, and whose outer circumferential surface is connected to the inner surface of the burring portion 10 at the periphery of the opening opened in the burner body 1. It is slidably fitted to the peripheral surface. A flange 11 is formed outward at the open end of the back cover 9, and an elastic gasket 12 is sandwiched between the flange 11 and the outer surface of the burner body 1. Reference numeral 13 denotes a spray nozzle fixed to the center of the bottom of the back cover 9, and is provided so that the combustion port 7 is located at the front. 14 is a carburetor cylinder, which is provided in front of the combustion port 7.

Next, the effect will be explained. The fuel sprayed from the spray nozzle 13 is ignited by an ignition source (not shown) provided near the spray nozzle 13 and heats the vaporization cylinder 14 . However, all the fuel is not combusted with primary air alone, and the remaining fuel is vaporized within the vaporization tube 14, flows out of the vaporization tube 14, and is completely combusted by being supplied with secondary air from the flame port 4. This vaporization combustion causes the burner inner cylinder 6 to reach a high temperature and expand. The primary air cylinder 8 also rises in temperature due to heat transfer, and these push the back cover 9 to the right in the figure. However, since the back cover 9 and the burner body 1 are sealed with an elastic gasket 12, no air leakage occurs.

As described above, in the present invention, the back cover that fixes the spray nozzle is fixed to the thermally expanding burner inner cylinder via the primary air cylinder, and is not fixed to the burner body.
Due to the primary air cylinder, the dimensions of the combustion port and the spray nozzle are always maintained at an appropriate size, and ignition and combustibility can be stabilized. In addition, since the back cover and burner body, which absorb thermal expansion, are separated from the combustion part, sealing materials can be selected without considering the effects of heat, so the seals can be made at low cost, and there is no leakage of combustion air. This is possible.

It should be noted that the present invention is not limited to the embodiments, and may be used in conventional gun-type burners that are not vaporization type.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1... Burner main body, 2... Air duct, 3... Burner outer cylinder, 5... Air passage, 6... Burner inner cylinder, 7
...Combustion port, 9...Back cover, 12...Putskin, 1
3...Spray nozzle.

Claims (1)

[Scope of utility model registration request] A burner main body has an air passage formed inside, an opening into which the burner outer cylinder is fixed on one side, and an opening into which the back cover is inserted on the opposite side, and the burner outer cylinder is inserted into the opening. A bottomed cylindrical burner inner cylinder, which forms an air passage between the burner outer cylinder and the burner outer cylinder and has a flame port perforated on the inner peripheral surface, is fixed at its open end. One end having the opening of the primary air cylinder is fixed to the cylinder, and a bottomed cylindrical back cover with a spray nozzle fixed to the bottom is inserted into the open other end of the primary air cylinder through the opening of the burner body. A combustion device characterized in that a flange formed at an open end of a back cover and an outer surface of a burner body are sealed with an elastic gasket.