JPS5842745Y2 - gas burner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas burner used in a forced intake/exhaust type combustor.

In conventional gas burners of this type, in order to achieve good mixing of gas and primary air, the length of the mixing pipe section in the gas supply pipe needs to be 6 to 10 times the throat diameter, so the overall length of the burner is quite long. There were some drawbacks.

The present invention was devised to eliminate the above-mentioned drawbacks.A spiral groove is provided on the outer circumferential surface of the tip of the gas supply pipe with the tip closed, and a gas amount adjustment hole is provided in this groove. It is characterized in that the tip is inserted into the burner inlet.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, 1 is a combustion chamber, 2 is a burner having a mixing chamber 6 provided in the combustion chamber 1, 3 is a gas supply pipe whose tip 3a is inserted into the inlet of the burner 2, Its tip is closed, and the tip 3a has a spiral groove 4.
is provided.

5 is a gas amount adjustment hole provided in a part of the spiral groove 4; 7
8 is a pressure equalizing chamber that communicates with the blower 7 and houses the inlet of the burner 2; 9 is a secondary air hole that communicates the combustion chamber 1 with the pressure equalizing chamber 8;

Next, the operation of this embodiment having the above structure will be explained.

The flow rate of the gas supplied by the gas supply pipe 3 is controlled by the gas amount adjustment hole 5 provided at the tip 3a, and the gas is fed into the spiral groove 4.
It flows through this spiral groove 4 and is introduced into the mixing chamber 6 of the burner 2.

On the other hand, the combustion air is supplied to the pressure equalization chamber 8 by the blower 7, a part of which is introduced as primary air into the mixing chamber 6 of the burner 2 via the spiral groove 4, and the remainder is introduced as secondary air into the secondary air hole. 9 into the combustion chamber 1.

The primary air introduced into the mixing chamber 6 is swirled and further mixed with the gas introduced into the mixing chamber 6 through the gas amount adjustment hole 5 as described above.

In this case, the length of the tip 3a of the gas supply pipe 3 inserted into the burner 2, that is, the mixing tube section is short, but the length of the spiral groove 4 provided in the tip 3a is long, so that the gas Since the length is sufficient for swirling and mixing of the primary air and the primary air, good mixing of the two is achieved.

As explained above, according to the present invention, by shortening the length of the tip part (mixing pipe part) of the gas supply pipe inserted into the burner, the overall length of the burner is shortened and the burner pace is reduced. It can be measured.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway view showing a combustor provided in the gas burner of the present invention, and FIG. 2 is a sectional view of essential parts showing an embodiment of the gas burner of the present invention. 2...Burner, 3...Gas supply pipe, 3
a...Tip, 4...Spiral groove, 5
...Gas amount adjustment hole.

Claims (1)

[Scope of utility model registration request] A gas burner characterized in that a spiral groove is provided on the outer peripheral surface of the distal end of a gas supply pipe with a closed end, a gas amount adjustment hole is provided in this groove, and the distal end of the gas supply pipe is inserted into the burner inlet. .