JPH08589Y2 - Burner tip for mold heating - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention burns an original mixed gas of a fuel such as city gas and natural gas and air in a blast state to heat the heated object by burning the original mixed gas. A burner chip for heating a mold.

[0002]

2. Description of the Related Art Conventionally, when an original mixed gas of fuel such as city gas and natural gas and air is supplied in a blast form, the original mixed gas is burned to heat a heated object such as a die. As the burner chip, there is, for example, a commercially available SSO type mold burner chip. FIG. 1 shows that the above-mentioned mixed gas is generated and supplied to the SSO type mold heating burner chip 21 or the mold heating burner chip 1 described later according to the present invention. It is a system diagram of a system for heating, for example, a mold M by burning the original mixed gas of As shown in FIG. 1, this system mixes air from a blower BL whose flow rate is regulated by a butterfly valve BV and fuel such as 13A gas whose pressure is regulated by a zero governor ZG with a mixer-MX. The mold M is heated by supplying it to the burner chip 21 for SSO type mold heating or the burner chip 1 for mold heating described later according to the present invention through a pipe PI and burning it.

7A, 7B and 7C are left side views of the conventional SSO type mold burner chip 21 for heating the mold,
It is a sectional view and a right side view. 7 (A), (B),
As shown in (C), the burner chip 21 for heating the mold has a cylindrical outer member 22 having a screw 22A on the left outer peripheral surface in the drawing, and an inner member of the outer member 22. In addition, the main flame gas passage 23A is formed in a penetrating manner and the inner member 23 is provided with a plurality of flame holding gas passages 23B formed in a spiral shape on the outer peripheral portion. The screw 22A is a pipe PI and a burner tip 21 for heating the die.
At the time of coupling, the pipe PI is screwed into a screw cut on the inner diameter surface of the pipe PI. As shown in FIG. 7B, the original mixed gas is supplied to the mold heating burner chip 21 from the original mixed gas supply chamber 24 on the left side in the drawing, and the main stream is the main flame gas passage 2
It becomes the main flame gas G1 flowing through 3A, and the other becomes the flame holding gas G2 flowing through the plurality of flame holding gas passages 23B. Then, the main flame gas G1 and the flame holding gas G2 are combusted in the combustion chamber 25 to heat a heated object such as the mold M as shown in FIG.

[0004]

In the conventional die heating burner chip 21 described above, the plurality of flame holding gas passages 23B of the inner member 23 are formed in a spiral shape, and at the same time, as shown in FIGS. Since the left and right end surfaces of the inner member 23 have a complicated shape such as a petal shape as shown in FIG. 4), there is a problem in that machining is time-consuming and costly. Further, there is a problem in that the end portion of the flame holding gas passage 23B of the inner member 23 has a thin portion and a thick portion, and the thin portion is likely to be thermally deformed or damaged during combustion heating. is there.

Therefore, in the present invention, the cost of the burner chip for heating the mold is reduced by making the inner member into a shape simple and resistant to thermal deformation without impairing the combustion performance of the burner chip for heating the mold. In addition to the above, it is a technical problem to be solved to extend the life of the inner member.

[0006]

The technical means for solving the above-mentioned problems is to provide an inner member having a main flame gas passage and a flame holding gas passage formed inside a tubular outer member.
When the original mixed gas is supplied from the outside to the original mixed gas supply chamber in a blast form, the main flame gas and the flame holding gas that have passed through each of the main flame gas passage and the flame holding gas passage are burned in the combustion chamber, A burner tip for heating a die for heating an object to be heated is formed in such a manner that the main flame gas passage is penetratingly formed in the axial center portion of the inner member, and the main mixed gas supply chamber side is provided with an external member. A first flange portion is formed in which the radial surface is in close contact with the inner diameter surface of the outer member and a plurality of first flame holding holes that serve as the flame holding gas passages are opened in a penetrating manner in the axial direction. The combustion chamber side has a plurality of second flame holding holes opened at a predetermined inclination angle so that the flame holding gas swirls in the combustion chamber.
And a second flange portion having a uniform thickness is formed,
Further, between the first flange portion and the second flange portion, the flame holding gas that has passed through the first flame holding hole of the first flange portion is almost discharged.
After hitting a vertical surface, flow in the direction of the second collar part.
As described above, a wall-shaped member that reduces the flow velocity of the flame holding gas is provided.

[0007]

According to the die heating burner tip having the above-described structure, when the original mixed gas is blasted from the outside into the original mixed gas supply chamber, the original mixed gas is mainly flowed through the main flame gas passage. While flowing directly into the combustion chamber, flame holding gas
Immediately after passing through the flame holding holes, the wall-shaped member is decelerated and decelerated, and when the decelerated flame holding gas passes through the plurality of second flame holding holes and is delivered to the combustion chamber, it is delivered to the combustion chamber. The generated flame-holding gas swirls around the main flame at a decelerated flow velocity. Since the second collar has a uniform wall thickness, it is
Less susceptible to deformation and deterioration.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 2 is a sectional view of a burner tip 1 for heating a mold according to the present invention. As shown in FIG. 2, the mold heating burner chip 1 is composed of a cylindrical outer member 2 and an inner member 3 attached to the inner diameter portion of the cylindrical outer member 2. A screw 2A is provided on the outer peripheral surface of the outer member 2.
Is cut, and the screw 2A is the pipe P shown in FIG.
The die heating burner tip 1 is screwed to the pipe PI so as to be screwed to the pipe PI.

On the other hand, a main flame gas passage 4 is formed in the center of the inner member 3 so that the main flame gas passage 4 penetrates from the mixer MX through the pipe PI to the original mixed gas supply chamber of the burner chip 1 for mold heating. The main flame gas G1 of the original mixed gas supplied to
It is configured to flow through the main flame gas passage 4 and into a combustion chamber 6 formed on the side opposite to the original mixed gas supply chamber 5 for combustion. Further, a first flange portion 7 having a shape such that the outer peripheral surface thereof closely contacts the inner peripheral surface of the outer member 2 is formed on the side of the original mixed gas supply chamber 5 of the inner member 3, and the side of the combustion chamber 6 is formed. A second brim portion 8 having a shape such that the outer peripheral surface thereof closely contacts the inner peripheral surface of the outer member 2 is formed. Further, the first flange portion 7 has a plurality of first flame holding holes 9 for allowing a part of the original mixed gas supplied to the original mixed gas supply chamber 5 to flow as the flame holding gas G2. Open to.

Further, a plurality of second flame holding holes 10 are formed in the second collar portion 8. The second flame holding holes 10 are opened to have a required angle with respect to the central axis so that the flame holding gas G2 flowing out of each hole 10 swirls around the main flame gas G1 in the combustion chamber 6. Has been.

A wall-shaped member 11 for reducing the flow velocity of the flame holding gas G2 passing through the first flame holding hole 9 is formed between the first flange portion 7 and the second flange portion 8. ing. That is, the flame-holding gas G2 that has passed through the first flame-holding hole 9 once hits the wall surface of the wall- shaped member 11 and is decelerated, and then the gap between the outer peripheral surface of the wall- shaped member 11 and the inner peripheral surface of the outer member 2 is reduced. Through the second
It flows out into the combustion chamber 6 from the second flame holding hole 10 of the collar portion 8. Therefore, the flame holding gas G2 flows out from the second flame holding hole 10 into the combustion chamber 6 at a flow velocity slower than that of the main flame gas G1, and swirls around the main flame gas G1. In this way, flame holding gas G
It was confirmed by an experiment that the combustibility is improved and the influence on the wind pressure (cross wind) is reduced by reducing the flow velocity of 2 and swirling around the main flame gas G1.

Incidentally, the outer member 2 and the inner member 3 are
In order to clarify the respective shapes, FIG. 3 shows the cylindrical outer member 2 and FIG. 4 shows the inner member 3, in which (A) is a left side view and (B) is a front view. Figure,
(C) is a right side view.

FIG. 5 shows a burner tip 1 for heating the above mold.
6 is a combustion characteristic diagram of FIG. 6, and FIG. 6 is a combustion characteristic diagram of the conventional SSO type mold burning burner chip 21. In this combustion characteristic diagram, the horizontal axis represents the amount of heat of the gas supplied as fuel per hour, and the vertical axis represents the excess air coefficient m. Comparing the two shows a dotted gas rich line and a solid line. The good combustion area surrounded by the air-rich line shows almost no characteristics.

As described above, the die heating burner chip 1 according to the present invention does not deteriorate the combustion performance as compared with the conventional SSO type die heating burner chip 21, and the inner member 3 does not deteriorate.
The shape can be made extremely simpler than the shape of the inner member 23 of the conventional SSO type mold heating burner chip 21. Further, the shape of the portion that becomes high in temperature has a uniform thickness without a complicated portion like the shape of the inner member 23 of the conventional SSO-type burner chip 21 for the die heating, so that the combustion heat Deformation, damage, etc. due to

[0015]

As described above, according to the present invention, the first tsuba is used.
The first flame holding hole of the first collar portion is provided between the second collar portion and the second collar portion.
After the passing flame holding gas hits a nearly vertical surface, the second
Decrease the flow velocity of flame holding gas so that it flows in the direction of the collar part of
Since the inner member mounted on the outer member can be formed into an extremely simple shape without deteriorating the combustion performance by providing the wall-shaped member for the mold heating bar.
There is an effect that the cost of the inner tip can be reduced and the life of the inner tip can be extended by preventing the inner member from being deformed or damaged by the combustion heat.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of use of a burner chip for mold heating according to the present invention.

FIG. 2 is a sectional view showing the configuration of an embodiment of the present invention.

FIG. 3 is a left side view, a front view, and a right side view of an outer member.

FIG. 4 is a left side view, a front view, and a right side view of an inner member.

FIG. 5 is a combustion characteristic diagram of a burner chip for heating a mold according to the present invention.

FIG. 6 is a combustion characteristic diagram of a conventional die burner tip for heating.

FIG. 7 is a left side view, a front view, and a right side view showing a configuration of a conventional mold heating burner chip.

[Explanation of symbols]

1 type burner tip 2 outer member 3 inner member 4 main flame gas passage 5 original mixed gas supply chamber 6 combustion chamber 7 first flange 8 second flange 9 first flame holding hole 10 2 flame holding holes 11 wall-shaped members

Claims (1)

[Scope of utility model registration request] 1. An inner member in which a main flame gas passage and a flame holding gas passage are formed is mounted inside a cylindrical outer member, and the original mixed gas is supplied from the outside to the original mixed gas supply chamber in a blast form. When burned, the burner chip for die heating is configured to burn the main flame gas and the flame holding gas that have passed through the main flame gas passage and the flame holding gas passage in a combustion chamber to heat an object to be heated. The main flame gas passage is formed in the axial center portion of the inner member in a penetrating manner, and an outer diameter surface of the main mixed gas supply chamber side is an inner diameter surface of the outer member. While forming a first flange portion that is formed by penetrating a plurality of first flame holding holes that are in close contact with and that serve as the flame holding gas passage in the axial direction,
On the side of the combustion chamber, there is provided a second flange having a plurality of second flame holding holes opened at a predetermined inclination angle so that the flame holding gas swirls in the combustion chamber, and has a uniform thickness. Part is formed
Ri, further, between the first flange portion and the second flange portion,
The flame-holding gas that has passed through the first flame-holding hole of the first flange portion.
Direction of the second collar after hitting a nearly vertical surface
A burner chip for heating a mold, characterized in that a wall-shaped member for reducing the flow velocity of the flame-holding gas is provided so that the burner chip flows.