JPS6137954Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a burner, and particularly to a burner suitable for a glass joint kiln.

In a conventional glass kiln, a burner is placed in the center of a pot spaced apart from each other in the circumferential direction of a circular hearth. In such a joint kiln, it is preferable to heat the lower part of each pot to promote convection in the glass fabric in order to remove bubbles and clarify the glass fabric. Therefore, the burner is installed facing downward at the top of the furnace body in the center of the hearth, and the combustion exhaust gas from the burner flame is discharged from exhaust ports formed in the furnace body corresponding to each cat pot. It's summery.

However, the flame of such a burner may become eccentric due to its higher temperature than the surrounding furnace air, or may become eccentric due to slight dimensional differences in each exhaust port or differences in suction force at each exhaust port. . Therefore, a problem arises in that only a portion of the plurality of pots is efficiently heated and the glass fabric is melted, and the glass fabric in the remaining pots is not efficiently heated. Such eccentricity of the burner flame is caused by slight dimensional errors during furnace construction or dimensional changes over time. Therefore, it has been desired to develop a burner that can heat each pot evenly by adjusting the direction of the flame not only during furnace construction but also during operation.

An object of the present invention is to provide a burner that can easily adjust the direction of the flame and prevent eccentricity.

The present invention consists of an outer cylinder whose inner surface is covered with heat insulating material and whose upper end is closed; An inner cylinder is connected to a fuel supply source by penetrating the upper end of the outer cylinder and has a lower end located axially inward than the lower end of the outer cylinder; An air supply pipe for supplying air into the air passage; a burner plate fixed to the lower end of the inner cylinder; at least three adjustment screws arranged at equal intervals in the circumferential direction, and a burner tile connected to the lower end of the outer cylinder and provided with flame holding holes concentrically communicating with the air passage,
A conical constriction part is formed at the upper end of the flame holding hole of the burner tile, which connects to the inner peripheral surface of the heat insulating material and becomes smaller in diameter toward the bottom.The burner plate is placed slightly above the lower end surface of the inner cylinder. The disc member includes a disc member that is arranged and has an inner cylinder inserted therethrough, and a cylindrical member that is connected to the outer periphery of the disc member, extends downward, and forms an annular gap with the inner surface of the heat insulating material. circular holes of the same size are formed at equal intervals in the circumferential direction, and a cylindrical body that communicates with each hole is suspended and fixed to the lower surface of the disc member, and the inner cylinder and the cylindrical member are connected to each other. The burner is characterized in that each lower end surface with respect to the cylindrical body lies within a virtual plane perpendicular to the axis of the inner cylinder, and the tip of the adjustment screw abuts on the outer periphery of the cylindrical member.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, and FIG. 2 is a sectional view taken along the section line - in FIG. 1. A circular hearth 3 is formed in the upper part of the furnace body 2 of the glass kiln 1, and a plurality of, for example, four cat pots 4 are arranged on the hearth 3 at equal intervals in the circumferential direction. The opening 4a of each pot 4 penetrates the side wall of the main body 2 and is open to the outside. Introducing glass raw materials and removing seeds for molding are carried out from the outside of the glass kiln 1 through the opening 4a.
It is done through.

At the upper center of the furnace body 2, a burner 6 is provided facing downward at the center of each pot 4. The flame 7 formed by the burner 6 collides with the flame impingement plate 8 and is spread radially, thereby melting the glass fabric in each pot 4. Exhaust ports 9 are formed in the furnace body 2 to correspond to the pots 4, respectively, and the exhaust gas discharged from the exhaust ports 9 is induced to be discharged through a flue 10.
Note that an ash pool 11 for combustion ash is formed at the lower center of the furnace body 2.

FIG. 3 is an enlarged longitudinal sectional view of the burner 6. The burner 6 includes an outer cylinder 12 , an inner cylinder 13 disposed concentrically within the outer cylinder 12 , a disc-shaped burner plate 14 fixed to the outer periphery of the lower end of the inner cylinder 13 , and a burner plate 14 . an adjusting screw 15 that abuts the outer periphery and is screwed into the outer cylinder 12 so as to be able to be screwed forward and backward;
Burner tile 16 connected to the lower end of outer cylinder 12
including. An annular air passage 17 is formed between the inner surface of the outer cylinder 12 and the outer surface of the inner cylinder 13. Outer cylinder 1
A heat insulating material 29 is stretched on the inner surface of 2. The burner tile 16 has flame holding holes 18 that communicate with the air passage 17.
is formed.

FIG. 4 is a sectional view taken along the section line - in FIG. 3. The upper end of the outer cylinder 12 is closed by an end plate 19. Further, an air supply pipe 21 is tangentially connected to the upper part of the outer cylinder 12, and this air supply pipe 21 is connected to an air supply source such as a blower (not shown). Therefore, combustion air is supplied from the air supply pipe 21 to the air passage 17 while rotating like an arrow. The upper end of the inner cylinder 13 extends upward through the end plate 19 and is connected to a fuel gas supply source (not shown), such as city gas.

FIG. 5 is a sectional view taken along the section line - in FIG. 3. The lower end of the inner cylinder 13 is located above the lower end of the outer cylinder 12. A disc-shaped burner plate 14 is fixed to the outer surface of the lower end of the inner cylinder 13 with an annular gap 22 formed between it and the inner surface of the outer cylinder 12 . This burner plate 14 includes a disc member 24
and a cylindrical member 25 fixed to the outer periphery of the disc member 24. Four cylindrical bodies 26 are suspended and fixed to the disc member 24 at intervals in the circumferential direction. Circular holes 27 of the same size are formed in the disc member 24 at equal intervals in the circumferential direction. As described above, two cylinders 26 are fixed to the lower surface of the disc member 24 so as to hang down inwardly and outwardly in the radial direction of the disc member 24 with respect to the hole 27 . The lower end surfaces of the inner cylinder 13, the cylindrical member 25, and the cylindrical body 26 are
lies in an imaginary plane perpendicular to the axis of In this way, a passage 28 is formed parallel to the axis of the inner cylinder 13 and communicating with the hole 27.

Screw holes 30 extending in the radial direction are formed in the outer cylinder 12 at equal intervals in the circumferential direction. These screw holes 3
An adjustment screw 15 is screwed into the hole. Each adjustment screw 1
The tip of 5 comes into contact with the outer periphery of the burner plate 14. Therefore, by screwing each adjusting screw 15 forward and backward, the axes of the burner plate 14 and the inner cylinder 13 can be inclined with respect to the axis of the outer cylinder 12. Note that there may be three adjusting screws 15 as shown in FIG. 5, or three or more adjusting screws 15 may be provided at equal intervals in the circumferential direction.

At the upper end of the flame holding hole 18 of the burner tile 16,
A truncated conical constriction portion 31 is formed which is continuous with the inner circumferential surface of the heat insulating material 29 and whose diameter decreases downward. If the inner diameter of the upper end of the constricted part 31 is D1, and the inner diameter of the lower part of the constricted part 31 is D2, it is determined that D2/D1=85 to 95/100 (1). Within a plane passing through the axis of the inner cylinder 13, the inner circumferential surface of the heat insulating material 29 extends downward and the constricted portion 31
The angle θ between the inner circumferential surface and the inner circumferential surface is set to, for example, 25 to 45 degrees.

In the burner 6 configured in this manner, fuel such as city gas is supplied from the inner cylinder 13, and combustion air is supplied from the air supply pipe 21 into the air passage 16. The combustion air circulates in the air passage 16 and reaches the burner plate 14 . A part of this combustion air (for example, 50 to 70%) is guided to the flame holding hole 18 through the gap 22 while swirling.
The remaining combustion air (e.g. 30-50%) is
By flowing through the passage 28, the swirling force is lost and the flame is guided to the flame holding hole 18. Then, the fuel supplied from the inner cylinder 13 is combusted by the combustion air to form a flame.

By supplying combustion air while swirling within the air passage 17, uneven flow of air in the air passage 17 is prevented. Furthermore, by supplying part of the air while being swirled by the burner plate 14 and supplying the remaining air in a straight direction, it is possible to prevent air drift and improve the flame holding effect of the flame. . Further, since the flame holding hole 18 of the burner tile 16 is formed with the throttle part 31, the mixing of the fuel and the combustion air is promoted in the throttle part 31, and a good combustion state can be obtained.

The flame formed by the burner in this manner has straight-line propagation and can achieve good combustion.

It is assumed that in the glass joint kiln 1, the suction force of exhaust gas differs at each exhaust port 9 due to dimensional errors in each exhaust port 9 at the time of furnace construction or dimensional changes due to aging, and the flame 7 becomes eccentric. In this case, each adjustment screw 15 is screwed forward or backward to move the inner cylinder 13 and burner plate 14 to the outer cylinder 12.
tilt with respect to the axis of By doing so, the flame 7 formed by the burner 6 can be directed vertically downward, and each pot 4 can be heated evenly.

The present invention can be widely implemented in connection with not only the glass joint kiln of the above-mentioned embodiment but also other heating furnaces.

As described above, according to the present invention, part of the combustion air is supplied while swirling, and the remaining combustion air is supplied in a straight line, thereby achieving good combustion and obtaining a flame with improved straightness. be able to. Moreover, since the axis of the inner cylinder can be inclined with respect to the axis of the outer cylinder by operating the adjustment screw, it is possible to easily prevent the flame from being eccentric.

The disc member of the burner plate has circular holes of the same size and at equal intervals in the circumferential direction, so combustion air is injected below the burner plate at an almost equal flow rate in the circumferential direction. It is possible that Since these cylinders each communicate with each hole, this also allows combustion air to flow through the holes along the axial direction. This makes it possible to obtain a flame with improved straightness. The lower end surfaces of the inner cylinder, the cylindrical member, and the cylinder body lie in an imaginary plane perpendicular to the axis of the inner cylinder, which causes turbulence in the combustion air and gaseous fuel below the burner plate. This improves the straightness of the flame.

Furthermore, since the constriction part is connected to the inner circumferential surface of the heat insulating material 29 and has a truncated conical shape that becomes smaller in diameter toward the bottom, the flame is not disturbed by the constriction part and is constricted to a small size. It is also possible to improve the straightness of the flame.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is a sectional view taken from the cutting plane line - of Fig. 1, and Fig. 3 is a sectional view of an embodiment of the present invention.
The figure is an enlarged longitudinal cross-sectional view of the burner 6 in Figure 1, Figure 4 is a cross-sectional view taken from the cutting plane side in Figure 3, and Figure 5 is a cross-sectional view taken from the cutting plane line in Figure 3. be. DESCRIPTION OF SYMBOLS 1... Glass joint kiln, 2... Furnace body, 3... Hearth, 6... Burner, 12... Outer cylinder, 13... Inner cylinder, 14... Burner plate, 15... Adjustment screw, 16... ...burner tile, 17...air passage,
18...Flame holding hole, 21...Air supply pipe, 22...
Gap, 31... constriction section.

Claims (1)

[Scope of utility model registration request] An outer cylinder whose inner surface is covered with heat insulating material and whose upper end is closed, which is arranged concentrically with the outer cylinder to form an annular air passage between the inner surface of the outer cylinder and whose upper end is the upper end of the outer cylinder. an inner cylinder whose lower end is located axially inward than the lower end of the outer cylinder, and which is tangentially connected to the upper end of the outer cylinder;
an air supply pipe for supplying combustion air into the air passage; a burner plate fixed to the lower end of the inner cylinder; a burner plate that passes through the outer cylinder in a radial direction so as to be freely screwable and retractable; at least three adjustment screws arranged at equal intervals in the circumferential direction, and a burner tile that is connected to the lower end of the outer cylinder and has flame-holding holes that concentrically communicate with the air passage; A conical constriction part that connects to the inner peripheral surface of the heat insulating material and becomes smaller in diameter toward the bottom is formed at the upper end, and the burner plate is arranged slightly above the lower end surface of the inner cylinder. The disc member includes a disc member to be inserted, and a cylindrical member that is connected to the outer periphery of the disc member, extends downward, and forms an annular gap with the inner surface of the heat insulating material, Circular holes of the same size are formed at intervals, and a cylindrical body that communicates with each hole is hung down and fixed to the lower surface of the disc member, and the lower surface of the inner cylinder, the cylindrical member, and the cylindrical body are connected to each other. A burner characterized in that the end face lies within a virtual plane perpendicular to the axis of the inner cylinder, and the tip of the adjustment screw contacts the outer periphery of the cylindrical member.