KR101734384B1 - Apparatus of radiant tube for annealing furnace - Google Patents

Apparatus of radiant tube for annealing furnace Download PDF

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Publication number
KR101734384B1
KR101734384B1 KR1020150144820A KR20150144820A KR101734384B1 KR 101734384 B1 KR101734384 B1 KR 101734384B1 KR 1020150144820 A KR1020150144820 A KR 1020150144820A KR 20150144820 A KR20150144820 A KR 20150144820A KR 101734384 B1 KR101734384 B1 KR 101734384B1
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KR
South Korea
Prior art keywords
tube
present
radiating tube
delete delete
annealing furnace
Prior art date
Application number
KR1020150144820A
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Korean (ko)
Other versions
KR20170045000A (en
Inventor
하재현
권우택
하원
서정석
Original Assignee
주식회사 포스코
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Priority to KR1020150144820A priority Critical patent/KR101734384B1/en
Publication of KR20170045000A publication Critical patent/KR20170045000A/en
Application granted granted Critical
Publication of KR101734384B1 publication Critical patent/KR101734384B1/en

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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/663—Bell-type furnaces
    • C21D9/667—Multi-station furnaces

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The present invention relates to a radiating apparatus for annealing a material disposed in a heat treatment facility, the apparatus including a tube portion having a tube therein formed therein so as to allow a flame to pass therethrough, wherein a plurality of patterns are arranged on a surface of the tube portion , The mechanical stiffness of the patterned pipe is increased so that thermal deformation does not occur despite exposure to high heat and the radiant heat efficiency is improved by increasing the surface area.

Description

[0001] Apparatus of radiant tube for annealing furnace [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiating apparatus provided in a heat treatment facility such as an annealing furnace and more specifically to a radiating apparatus for heating a material passing through an annealing furnace such as a strip, Which is a technical field related to a radiation tube device for increasing thermal efficiency.

In general, the cold-rolled material strip is heat-treated at a specific temperature to achieve the desired strength and grain size, or passed through a furnace maintained at a specific temperature for surface treatment.

Batch type annealing in a coil state In order to increase the productivity and obtain a uniform heat treatment effect, the strip is annealed by a continuous annealing method through a heat treatment facility such as an annealing furnace maintained at a specific temperature , And a radiating tube is disposed inside the annealing furnace to heat the strip passing through the annealing furnace. The flame generated from the burner circulates in the inside of the radiating tube to heat the radiating tube and the radiant heat from the heated radiating tube is used to heat the strip, Is uniformly and indirectly heated.

Generally, a radiating tube is manufactured by casting a tube shape using the centrifugal casting method, or by making the plate material into a tube shape by welding and by welding the curved tube and the straight tube together.

The manufactured radiating tube is heated to a high temperature of several hundreds to one thousand degrees depending on the setting conditions of the annealing furnace. Even if a heat resistant alloy is used, the radiating tube has a problem that the material of the radiating tube deteriorates when it is used for a long time at a high temperature So that the radiation tube is deformed.

Korean Utility Model Application No. 20-1998-0027671 Korean Utility Model Application No. 20-1999-0002964

The radiating tube apparatus according to the present invention has been devised to solve the conventional problems as described above, and it is intended to improve radiant thermal efficiency by increasing the surface area without causing thermal deformation despite continuous exposure to high temperature.

The solution of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

The radiating tube apparatus according to the present invention has the following means for solving the problems to be solved.

A radiating tube apparatus according to the present invention is a radiating tube apparatus for annealing a material disposed in a heat treatment facility and includes at least one tube portion in which a duct through which a flame or a heating gas passes is formed, And a plurality of patterns are arranged on the surface of the substrate.

The plurality of patterns of the tube portion of the radiating tube apparatus according to the present invention may be characterized by being formed of a plurality of polygons.

The pattern of the tube portion of the radiating tube apparatus according to the present invention may be characterized in that each of the plurality of polygons is arranged adjacent to each other and one side of the polygon is arranged to share with the other side of the adjacent polygon.

The plurality of patterns of the tube portion of the radiating tube apparatus according to the present invention may be characterized by being honeycomb.

The honeycomb of the radiating tube device according to the present invention may include a honeycomb frame constituting the outside of the honeycomb, and a hole may be formed at the center of the honeycomb frame.

The plurality of patterns of the tube portion of the radiation tube device according to the present invention may be characterized by being formed of a plurality of circular patterns.

The plurality of circles of the radiation tube device according to the present invention may be characterized in that the circles are disposed adjacent to each other to make point contact.

The plurality of circles of the radiating tube apparatus according to the present invention may include a circle frame constituting the circumference of the circle, and a hole may be formed at the center of the circle frame.

The plurality of patterns of the tube portion of the radiating tube apparatus according to the present invention may include a plurality of circles and a bridge connecting adjacent ones of the plurality of circles.

The plurality of patterns of the radiating tube device according to the present invention include a plurality of circular frames each of which forms the plurality of circular circumferences, wherein a hole is formed at a central portion of the plurality of the circular frames .

The heat treatment facility of the radiation pipe device according to the present invention is provided with an annealing furnace, and the pipe section includes a straight pipe section, and the plurality of patterns are regularly arranged on the surface of the straight pipe section.

The radiation tube device according to the present invention having the above-described configuration has the following effects.

First, mechanical rigidity is increased in the patterned straight pipe so that thermal deformation does not occur despite high temperature exposure.

Second, the radiation efficiency of heat is increased through the patterned straight pipe section, so that the annealing process in the annealing furnace can be efficiently performed.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a perspective view showing an annealing furnace radiation pipe apparatus according to a preferred embodiment of the present invention.
Fig. 2 is an enlarged view of a portion A in Fig.
3 is an enlarged view of a portion A in Fig.
Fig. 4 is another embodiment showing an enlarged view of a portion A in Fig.

The annealing furnace radiation pipe apparatus according to the present invention can be variously modified and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the description. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

For example, the present invention is applicable to other heat treatment apparatuses other than the annealing furnace to which the radiating pipe apparatus is applied, but it is to be understood that an annealing furnace will be described as a preferred embodiment in the description of the present embodiment.

1 is a perspective view showing an annealing furnace radiation pipe apparatus according to a preferred embodiment of the present invention. Fig. 2 is an enlarged view of a portion A in Fig. 3 is an enlarged view of a portion A in Fig. Fig. 4 is another embodiment showing an enlarged view of a portion A in Fig.

As shown in FIG. 1, the annealing furnace radiating line apparatus according to the present invention includes an internal straight line through which a flame can pass, and includes a straight straight portion 100 formed substantially straight. The end of the straight pipe portion 100 is formed with a bending portion 103 to connect the straight pipe portions 100 to each other.

At least one of the straight pipe portions 100 is disposed. When the plurality of straight pipe portions 100 are arranged, the straight pipe portions 100 are formed parallel to each other, and radiant heat is applied to the material, for example, a strip (not shown).

An intuitive frame 101 may be disposed at a starting point and an end point of the straight pipe section 100 to hold the holding frame 102 therebetween.

However, in the description of the present embodiment, it has been described that the pattern is preferably formed in the straight pipe portion. However, in the case where the bent pipe portion is bent at a small angle as required and has a length, There will be no.

It is preferable that a plurality of patterns of the straight pipe section 100 are manufactured through a three-dimensional molding method (a three-dimensional product manufacturing technique defined by ASTM F2792, hereinafter referred to as 3D printing).

More specifically, the pattern formed on the surface of the straight pipe section 100 can be formed using 3D printing,

Temperature rigidity and heat efficiency of the radiation tube can be ensured by printing a specific structure, that is, a pattern using a heat-resistant alloy.

As a result of analysis of the deformation pattern of the existing radiating tube which caused thermal deformation at high temperature, the direction of deformation in the partial deformation of the radiating tube was not observed. The structure to be printed on the rectifying surface of the radiating tube, It is necessary to secure rigidity. In addition, since the longitudinal deflection deformation of the radiating tube is mainly observed in the overall deformation of the radiating tube, the pattern to be printed on the surface of the rectifying tube 100 of the radiating tube has a stiffness against the longitudinal deformation of the radiating tube straight tube 100 It is important to secure. That is, in order to secure partial rigidity, there must be a plurality of circular or polygonal structures that can resist deformation in all directions. In order to secure the overall rigidity, printed circular or polygonal structures are interconnected Must be directly adjacent.

In the present invention, a plurality of circular or polygonal structures, i.e., patterns, which are interconnected by 3D printing on the surface of the rectilinear section 100 of the radiating tube, are additionally printed to increase the rigidity and increase the surface area of the radiating tube.

Such a pattern is preferably formed in a polygonal shape, as shown in Figs.

As shown in Fig. 2, the patterns of these polygons are disposed adjacent to each other, and each of these polygons is preferably formed so as to share one side of the adjacent ones.

The polygonal pattern may be a triangular, square, or pentagonal shape. However, as shown in FIG. 2, a hexagonal honeycomb shape is used to secure rigidity without directionality and to achieve space efficiency. I could.

The plurality of hexagonal honeycombs are formed by collecting the polygon units 110. Each of the polygon units 110 includes a honeycomb frame 111 forming the outer periphery of the honeycomb, A hole 112 may be formed.

In another embodiment of the pattern, as shown in FIG. 3, the pattern formed in the straight pipe section 100 may be formed of a plurality of circular patterns.

These circular patterns may be formed so that the circumference, that is, the rims are adjacent to each other, and one circle is arranged so that six circles are arranged adjacent to each other so that point contact is made.

Each of the circular units 120 includes a circular frame 121 constituting a circular circumference, and a central portion of the circular frame 121 is divided into Holes 122 are preferably formed.

As another embodiment of the pattern, these plurality of patterns may be formed in the circle bridge unit 130, as shown in Fig.

The circle bridge unit 130 may be embodied as a plurality of circles and bridges connecting the circular circles. More specifically, the circle bridge unit 130 includes a plurality of circular frames 131 each having a plurality of circular circumferences; And a bridge 133 for connecting the plurality of the circular frames 131 to each other. A central portion of the plurality of the circular frames 131 may be formed with a hole 132.

1, it is preferable that a plurality of the straight pipe sections 100 are arranged in parallel to each other. The straight pipe section 100 is composed of a plurality of straight pipe sections 100, It is preferable that the plurality of patterns have a thickness smaller than ½ of a distance between the outer circumferential surfaces of the plurality of straight pipe sections 100.

The scope of the present invention is defined by the claims, the parentheses used in the claims are not used for optional limitation but are used for the definite components and the description in parentheses is also interpreted as an essential component .

100: straight pipe part 101: straight pipe frame
102: holding frame 103: curved pipe part
110: Polygon unit 111: Honeycomb frame
112: Hole 120: Circle unit
121: Circle frame 122: Hole
130: Circle bridge unit 131: Circle frame
132: hole 133: bridge

Claims (11)

A radiation pipe apparatus for annealing a material placed in a heat treatment facility,
And at least one pipe portion in which a pipe through which the flame or the heating gas passes is formed,
A pattern formed by a plurality of polygons is regularly printed on the surface of the tube portion by 3D printing,
Wherein each of the plurality of polygons is disposed adjacent to each other,
A frame is formed on the outside of the polygon, a hole is formed in the center of the polygon,
And one side of the polygon is arranged to share with the other side of the adjacent polygon.
The method of claim 1, wherein the pattern formed by the plurality of polygons comprises:
Wherein the radiation tube device is a honeycomb.
The radiating tube apparatus according to claim 1, wherein the polygon is a triangle. delete delete delete delete delete delete delete delete
KR1020150144820A 2015-10-16 2015-10-16 Apparatus of radiant tube for annealing furnace KR101734384B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150144820A KR101734384B1 (en) 2015-10-16 2015-10-16 Apparatus of radiant tube for annealing furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150144820A KR101734384B1 (en) 2015-10-16 2015-10-16 Apparatus of radiant tube for annealing furnace

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KR20170045000A KR20170045000A (en) 2017-04-26
KR101734384B1 true KR101734384B1 (en) 2017-05-11

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Publication number Priority date Publication date Assignee Title
KR102326326B1 (en) * 2019-12-17 2021-11-12 주식회사 포스코 Radiant Tube Apparatus and Method of Manufacture thereof

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