JPH0531370Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a vaporization burner that vaporizes and burns liquid fuel such as petroleum.

(Prior Art) Conventional vaporizing burners are manufactured by pressing sheet metal to form component parts, and assembling the pressed parts.

(Problems to be Solved by the Invention) Evaporative burners manufactured mainly from such press-formed products have the disadvantage that sheet metal forming, processing, and assembly are not easy, resulting in high production costs.

An object of the present invention is to provide an inexpensive vaporizing burner that is easy to manufacture by configuring the vaporizing burner mainly using cylindrical parts, thereby reducing the amount of press work required for sheet metal.

[Structure of the idea]

(Means for Solving the Problems) In the present invention, a cylindrical combustion tube 11 is provided on a base 13, an outer tube 15 and an inner tube 17 are fitted concentrically into the combustion tube 11, and the outer tube 15 and inner cylinder 1
7 is shielded, and the tip of the inner tube 17 is formed shorter than the tip of the outer tube 15.
A mixing chamber 34 is formed in the base 13, a burner head 21 is provided at the tip opening of the outer cylinder 15, a combustion chamber 64 is provided in front of the burner head 21, and a combustion chamber 64 is provided in the base 13 at the proximal end side of the inner cylinder 17. A nozzle 44 for ejecting vaporized gas is fitted, and this nozzle 4
Primary air supply port 4 that supplies primary air to the tip of 4
1 opens into the inner cylinder 17 from the tip of the nozzle 44 to the base 13 side, and connects the combustion cylinder 11 and the outer cylinder 15.
This is a vaporizing burner in which a secondary air passage 62 for supplying secondary air to the combustion chamber 64 is provided between the combustion chamber 64 and the combustion chamber 64.

(Function) In the present invention, the liquid fuel vaporized gas ejected into the inner cylinder 17 from the nozzle 44 and the air supplied into the inner cylinder 17 from the primary air supply port 41 are mixed in the mixing chamber 34, and the mixture Gas is ejected from the flame port of the burner head 21 into the combustion chamber 64, and the mixed gas is combusted in the combustion chamber 64 while receiving sufficient oxygen supply from the air supplied through the secondary air passage 62 on the outer periphery of the outer cylinder 15. will be done.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

A combustion tube 11 formed into a cylindrical or polygonal cross-section is fixed to a base 13 via a mounting plate 12.

Inside the combustion tube 11, an outer tube 15, which is formed by welding two flow regulating plates 14 formed in a flange shape, is fitted in a concentrically aligned manner.
5, an inner cylinder 17 is fitted and welded concentrically through two annularly formed shielding plates 16 having a U-shaped cross section, and is welded to the inner side of the combustion cylinder 11. The cylinder 15 and the inner cylinder 17 are integrally constructed. Like the combustion tube 11, the outer tube 15 and the inner tube 17 are also formed into a cylindrical shape or a polygonal cross section. These cylinders 11, 15, 17 are
Made by roll forming or cutting pipe.

A burner head 21 is provided at the opening at the tip of the outer cylinder 15. This burner head 21 is connected to the outer cylinder 1.
A frame plate 22 is welded to the opening at the tip of the frame plate 22, and a convex portion of a mesh-like flame port plate 23 is fitted into the fitting hole of the frame plate 22. A large number of burner ports 24 are formed on the convex portion of the burner port plate 23.

Furthermore, the outer cylinder 15 is located inside the burner head 21.
A resistance plate 32 formed by integrally extending a mesh-like wire mesh 31 is fitted onto the inner circumferential surface of the resistor plate 32 and welded thereto. This resistance plate 32 is provided with a large through hole 33.

The tip of the inner tube 17 is formed shorter than the tip of the outer tube 15, and a mixing chamber 34 is formed inside the outer tube 15 without the inner tube 17. Since the volume of this mixing chamber 34 is formed to be larger than the volume of the inner cylinder 17, the mixed gas is depressurized and depressurized within this mixing chamber 34, and good mixing is achieved.

A primary air supply port 4 is provided on the base side of the inner cylinder 17.
1 is open, and a primary air supply gap 42 is provided between it and the base 13.
Furthermore, a nozzle 44 having a smaller diameter than the inner cylinder 17 is hermetically fitted into an opening 43 formed in the base 13, and the tip of this nozzle 44 is inserted into the primary air supply port 41. That is, the protrusion dimension b of the tip of the nozzle 44 is provided so as to be larger than the dimension a of the primary air supply gap 42 .

A combustion air supply port 51 is formed on the base side of the combustion tube 11, and a U-shaped ring is formed between the combustion tube 11 and the outer tube 15 on the base side of the combustion air supply port 51. Pressure regulating plate 52 in cross section
are fitted and welded. This pressure regulating plate 5
2 is provided with a large number of ventilation holes 53, and the primary air passing through the ventilation holes 53 from the combustion air supply port 51 flows through the primary air supply gap 54 formed between the outer cylinder 15 and the base 13 and the The air is pressurized and supplied to the primary air supply opening 41 around the nozzle 44 through the primary air supply gap 42 .

Further, a ventilation hole 61 is also provided in the baffle plate 14, and the combustion air supply port 51 is connected to the ventilation hole 61.
A secondary air passage 62 is provided between the combustion cylinder 11 and the outer cylinder 15 for supplying secondary air to the front of the burner head 21 through the combustion chamber 1. A conical guide plate 63 is welded to the tip of the secondary air passage 62, and the guide plate 63 directs the secondary air to the combustion chamber 64 formed in the center of the combustion tube 11. are collected.

Next, the operation of this embodiment will be explained.

The vaporized gas of liquid fuel (kerosene) ejected from the nozzle 44 is passed from the combustion air supply port 51 to the primary air supply port 4 through the ventilation hole 53 of the pressure regulating plate 52 and the primary air supply gaps 54 and 42 by an external blower or the like.
It passes through the inner cylinder 17 together with the primary air supplied under pressure to the fuel cell 1, is mixed under reduced pressure in the mixing chamber 34, and then passes through the through hole 33 of the resistance plate 32, the wire gauze 31, and the flame port 24 of the burner head 21, where it is combusted. Spouts into chamber 64. This mixed gas is ignited by applying high heat by a means such as a spark from an ignition plug (not shown), and a flame is formed in the combustion chamber 64.

On the other hand, rectified secondary air is supplied from the combustion air supply port 51 to the secondary air passage 62 between the combustion cylinder 11 and the outer cylinder 15 through the ventilation hole 61 of the rectifying plate 14, and this secondary air is Since the blue flame is supplied to the flame formed in the combustion chamber 64, the blue flame is fixed in the flame port 24 and burns.

This burner can withstand about three times as much high-load combustion as conventional burners. This is because the fluid resistance of the vaporized gas/primary air mixing passage leading to the mixing chamber 34 via the inner cylinder 17 is small, and the burner head 21 having the flame port 24 is formed compactly to reduce the resistance in the burner head 21. This is because it can be made larger, and high-load combustion is possible.

Note that in the illustrated embodiment, the primary air supply gap 42 is provided between the base 13 and the inner cylinder 17;
It is not always necessary to provide such a gap 42; for example, the base end of the inner cylinder 17 may be brought into close contact with the base 13, and the primary air supply port 41 may be opened on the upper side of the inner cylinder 17. Alternatively, air may be supplied from the side of the vaporized gas ejected from the nozzle 44.

However, when supplying air from the side of the vaporized gas ejected from the nozzle 44 in this way, in a Bunsen burner that pressurizes the combustion air and supplies it, if the nozzle seal is not good, the nozzle 44 and the base 13
There is a risk that atmospheric pressure gas may leak out of the burner from the fitting part with the burner, but as in the illustrated embodiment, the structure is such that a<b, so that the air supply port 51,
The primary air pressurized and supplied to the primary air supply port 41 via the pressure regulating plate 52 acts from behind the petroleum vaporized gas ejected from the nozzle 44, so that the petroleum vaporized gas ejected from the nozzle 44 is Since it is fed under pressure into the inner cylinder 17, temporarily the nozzle 4
Even if there is a gap (a manufacturing defect) between 4 and the base 13, gas will not leak out of the burner and it is safe.

[Effect of idea]

According to the present invention, the burner is formed by concentrically fitting the main components of the cylindrical combustion cylinder, the outer cylinder, and the inner cylinder, so these cylindrical members are manufactured by roll forming or pipe cutting. It is sufficient to concentrically combine the two, and the manufacturing equipment is simple and inexpensive. Also,
The supply passage for vaporized gas or air can be formed throughout the combustion cylinder using a combination of inexpensive cylindrical materials, making it compact and capable of high-load combustion.

Furthermore, since the primary air supply port for supplying primary air to the tip of the nozzle is opened in the inner cylinder on the base side from the tip of the nozzle, the liquid fuel vapor ejected from the tip of the nozzle is connected to the primary air supply port. Since it is immediately mixed with the supplied primary air, a sufficiently long mixing distance with the burner head can be secured, and the vaporized gas and air can be sufficiently mixed to supply a highly uniform mixed gas to the burner head. In addition, since the primary air supply port is opened in the inner cylinder on the base side from the tip of the nozzle, the primary air supplied under pressure to this primary air supply port acts from behind the vaporized gas ejected from the tip of the nozzle. Since the vaporized gas is sent under pressure to the burner head side, it has the effect of preventing gas leakage at the fitting part of the base and nozzle.

[Brief explanation of the drawing]

The figure is a sectional view showing an embodiment of the vaporizing burner of the present invention. 11... Combustion tube, 15... Outer tube, 17... Inner tube, 21... Burner head, 34... Mixing chamber, 4
1...Primary air supply port, 44...Nozzle, 62...
...Secondary air passage, 64...Combustion chamber.

Claims (1)

[Scope of utility model registration request] A cylindrical combustion tube is provided on the base, and an outer tube and an inner tube are fitted concentrically inside the combustion tube, so that the space between the outer tube and the inner tube is shielded, and the tip of the inner tube is A mixing chamber is formed within the outer cylinder by being shorter than the tip of the outer cylinder, a burner head is provided at the opening at the tip of the outer cylinder, a combustion chamber is provided in front of the burner head, and a proximal end of the inner cylinder is formed at the base. A nozzle for ejecting vaporized gas inserted into the side is fitted, and a primary air supply port for supplying primary air to the tip of this nozzle is opened in the inner cylinder on the base side from the tip of the nozzle, and is connected to the combustion cylinder. A vaporizing burner characterized in that a secondary air passage is provided between the outer cylinder and the combustion chamber for supplying secondary air to the combustion chamber.