KR100589982B1 - homogenizing furnace for heating successively - Google Patents

Abstract

The present invention relates to a continuous heat treatment apparatus. More specifically, the present invention is heat-treated at a uniform temperature by the blowing fan and the burner installed in the processing chamber while passing through a plurality of treatment chambers while continuously transporting a large amount of metal treatment material, By improving the properties such as hardness, toughness, etc. of the treated material, to obtain a stronger and more durable material to be treated, the heat treatment apparatus 1 of the present invention is a plurality of metal material (X) coming through the inlet (10) A metal to-be-processed material conveying apparatus having a means for conveying forward one by one; And a plurality of processing chambers (100, 200, 300, 400) installed on the upper portion of the workpiece to be transported by the transfer device to inject heated air, wherein each of the processing chambers (100, 200, 300, 400) heats the metal workpiece to a uniform temperature. Heating device 110 for; An inner chamber 120 for collecting hot air ignited from the heating apparatus 110; Injection means (150) for injecting hot air in the chamber (120) onto the workpiece; And air conditioning means 160 for controlling the air flow between the processing chambers 100, 200, 300, and 400 and the outside atmosphere.

Description

Homogenizing furnace for heating successively             

FIG. 1A is a plan view showing the continuous heat treatment apparatus of the present invention, FIG. 1B is an enlarged cross-sectional view of the main portion A of FIG. 1A, and FIG. 1C is a perspective view briefly showing only a part of the chamber of the present invention.

2 is a cross-sectional view taken along the line A-A of FIG. 1a, and FIG. 3 is a longitudinal cross-sectional view of the line B-B of FIG. 1a.

4A is an enlarged view of a portion C of FIG. 1A, and 4b is an enlarged view of a portion B of FIG.

5a or 5b is a side cross-sectional view of a heat shield plate having various forms according to the present invention.

* Brief description of the major symbols in the drawings *

1: Continuous heat treatment apparatus 10: Inlet

11: outlet 20: material to be processed

30: plate 100,200,300: processing chamber

101,102,121,122: horizontal frame 103,123: vertical frame

104,126: receiving unit 110: heating device

120: my chamber 121,122: horizontal support

123: vertical support 124: prop

125 connection portion 126,127 support

130: adjusting unit 131: rib

132: stopper 140: heat shield

150: injection means 151: blower

152: injection passage 160: air control means

161: horizontal combustion piping 162: vertical combustion piping

163: control valve

Field of invention

The present invention relates to a continuous heat treatment apparatus. More specifically, the present invention relates to a heat treatment apparatus for heat treatment at a uniform temperature while continuously transferring the metal material to be processed.

Background of the Invention

In the steel process, various heat treatments, such as quenching, tempering, and annealing, are performed in order to improve the properties such as hardness, toughness, and the like of the steel which is a product and to produce a stronger and more durable steel. These heat treatments are generally divided into heating and cooling processes. In the heating process, the transformation point temperature according to the components of the steel is a reference. For example, in the case of quenching, heating is carried out at a higher temperature than the transformation point, and in tempering and annealing, heating is required so as not to reach the transformation point.

Therefore, it is necessary to heat with good precision according to the purpose of heat processing. In addition, in order to suppress the dispersion | variation in the quality in the same member, it must heat uniformly over the inside of steel materials. This heat treatment method is called uniform heating.

In general, however, steel materials subjected to heat treatment of quenching and tempering generally manufactured are mainly cooled from the surface, so the hardness of the surface tends to be higher than that of the inside. Steel having such a hardness distribution in the plate thickness direction is weak in a corrosive environment, and when used in marine, petroleum, or natural gas pipelines, there is a problem of easily causing stress corrosion cracking.

MEANS TO SOLVE THE PROBLEM The present inventor improves the properties of hardness, toughness, etc. of the to-be-processed material by heat-processing at a uniform temperature, continuously conveying a large amount of metal to-be-processed material, in order to solve the conventional problem as mentioned above. To develop a uniform heat treatment method to obtain a.

 An object of the present invention is to heat-treat an object to a uniform temperature by a blowing fan and a burner installed in the chamber while passing a plurality of first to fourth chambers while continuously transporting a large amount of metal to be processed. The purpose of this is to improve the properties such as hardness, toughness, and the like of the material to be treated so that a stronger and more durable material can be obtained.

The above object of the present invention can be achieved by the present invention described below.

Summary of the Invention

Generally, the to-be-processed material X is heated in a heating furnace, and it heats up to around 1200 degreeC. After that, the workpiece is usually rolled to a predetermined thickness and width by a plurality of rolling machines. After rolling, the steel still at 800 ° C to 1000 ° C is forcedly cooled by water or naturally cooled by air. By this treatment, the steel is quenched. In particular, it is known that the strength and toughness of steel materials can be enhanced by performing rapid cooling with an accelerated cooling device after rolling.

After that, as in the continuous heat treatment apparatus 1 according to the present invention, heat treatment such as tempering and annealing is performed again as necessary. Therefore, the material to be heat treated is cut and shipped.

The present invention is a continuous heat treatment apparatus (1) for tempering or annealing as described above, the metal material to be processed having a means for forwarding the transfer of a number of metal material (X) through the inlet 10 step by step Re-conveying device 20; And a plurality of processing chambers (100, 200, 300, 400) installed on the upper portion of the workpiece to be transported by the transfer device to inject heated air, wherein each of the processing chambers (100, 200, 300, 400) heats the metal workpiece to a uniform temperature. The heating device 110, the inner chamber 120 for collecting the hot air ignited from the heating device 110, the injection means 150 for injecting the hot air in the chamber 120 on the workpiece ), And air control means 160 for controlling the air flow between the processing chambers 100, 200, 300, 400 and the outside air.

In the above, the processing material conveying apparatus 20 is omitted because it is the same as the configuration of the material conveying apparatus registered in the present patent applicant No. 013231 of the present applicant.

The air control means 160 is a horizontal combustion pipe 161 is installed to be located above the processing chamber (100, 200, 300, 400); A vertical combustion pipe 162 connected vertically to the horizontal combustion pipe 161 and installed to communicate with each of the processing chambers 100, 200, 300, and 400; And a control valve 163 installed in the vertical combustion pipe 162.

The inner chamber 120 has a vertical rectangular frame by the horizontal and vertical horizontal frames 121 and 122 and the vertical frame 123, but a plurality of vertical horizontal frames 122 are arranged between the horizontal and horizontal frames 121, and the like. Respectively installed at intervals, and each of the vertical horizontal frames 122 has a support 124 suspended therefrom, each connecting portion 125 installed horizontally and vertically at one end of the support 124; Horizontal and vertical horizontal support (126, 127) are installed side by side between each connecting portion 125; And an adjusting unit 130 for adjusting the horizontal and horizontal supports 126 and 127 to contract and expand according to temperature change. And it is installed between the horizontal and vertical horizontal support (126, 127) is characterized in that the thermal barrier plate 140 which is contracted and expanded horizontally in response to temperature changes.

The injection means 150 is a blower 151 installed in each of the processing chamber (100, 200, 300, 400); It characterized in that it further comprises an injection passage 152 for injecting hot air in the inner chamber by the blower 151 on the workpiece.

The adjusting unit 130 is a rib 131 is formed in the lower inner side of the horizontal and vertical horizontal support (126,127); The bent rib 131 is characterized in that the stopper 132 is welded fixed to the lower portion of the adjusting portion 130 to enable the horizontal and vertical horizontal support (126,127) in the state fitted to the adjusting portion 130.

The heat shield plate is characterized in that a plurality of bent portions having the same shape in the cross-section continuously or bent portion having a plurality of cross-sections are formed continuously.

The temperature in each of the processing chambers 100, 200, 300, and 400 is gradually lowered.

Hereinafter, with reference to the accompanying drawings the contents of the present invention will be described in detail below.

Detailed Description of the Invention

FIG. 1A is a plan view showing the continuous heat treatment apparatus of the present invention, FIG. 1B is an enlarged cross-sectional view of the main portion A of FIG. 1A, and FIG. 1C is a diagram briefly showing only the chamber in the present invention.

As shown in FIG. 1A, the plurality of processing chambers 100, 200, 300, and 400 of the present invention form a rectangular box shape by horizontal and vertical horizontal frames 101 and 102 (see FIG. 2) and a vertical frame 103. Is formed.

In addition, the receiving part 104 is formed inside the horizontal and vertical horizontal frames 101 and 102 constituting the processing chambers 100, 200, 300, and 400, and as shown in FIG. 1B, the plate material 30 is mounted, and the side surface is not shown. As shown in FIG. 1A, an inlet 10 for introducing the material X into each of the treatment chambers 100, 200, 300, and 400 and an outlet 11 for discharging the treated material are formed.

The processing chamber (100, 200, 300, 400) includes a heating device (110) for heating the metal material to be processed (X) at a uniform temperature, and an inner chamber (120) for collecting the heat ignited by the heating device; Injection means 150 for injecting high heat in the chamber 120 onto the workpiece X; Air adjusting means 160 for controlling the air flow between the processing chambers 100, 200, 300, 400 and the outside air is installed in each processing chamber under the same conditions and configurations as described below.

The heating device 110 is a burner, and in general, a gas burner may be used, but a liquefied petroleum gas burner capable of complete combustion may be used if necessary.

Heating means for heating the air in addition to the burner can be easily implemented in various ways by those skilled in the art to which the present invention pertains.

Looking at the configuration of the inner chamber 120 for collecting the hot air ignited from the heating furnace 110, as shown in Figure 1c by the horizontal and vertical horizontal frame 121, 122 and the vertical frame 123 to form a rectangular frame Configure.

A plurality of vertical horizontal frames 122 are respectively installed at equal intervals between the horizontal horizontal frames 121, and the support 124 is suspended from each vertical horizontal frame 122 as shown in FIG. 4B.

One end of the support 124 is provided with a short connecting portion 125 welded in a substantially " + "

Horizontal and vertical horizontal supporters 126 and 127 are installed side by side between the connecting portions 125 installed horizontally and vertically at one end of the support 124, and the horizontal and vertical horizontal supporters are connected according to the connection or temperature change. Adjusting unit 130 for adjusting the contraction, expansion 126, 127 is installed.

Between the connecting portion 125 and the horizontal and vertical horizontal support (121, 122) is horizontally contracted and expanded in accordance with the temperature change, and by the injection means to inhale the outside air when the hot air is temporarily sprayed out of the chamber Put the heat shield plate 140 so as to overlap each other.

The outside of the horizontal and vertical horizontal frames 121 and 122 and the vertical and vertical horizontal frames 123 are hermetically fixed with an iron plate (not shown), and only the lower portion of the heat shield plate 140 is formed to overlap each other.

In addition, the cross section of the horizontal and vertical horizontal support (126, 127) can be produced in various forms such as "○", "□", "◇", the connecting portion 125 is fitted with the horizontal and vertical horizontal support (126, 127) The cross section of is also the same as the horizontal and vertical horizontal support (126, 127) and it is preferable to form a smaller diameter so that it can be loosely fitted.

Such cross-sectional shape can be easily implemented by those skilled in the art to which the present invention pertains.

In addition, the thermal barrier plate 140, as shown in Figure 5a or 5b, a low thermal conductivity stainless steel plate can be bent in various forms of cross-section according to the position to bend to form the bent portion (141).

For example, the part passing through the horizontal frame is formed in an approximately "П" shape and the space part is repeatedly formed in a shape such as "П" or "∧", and formed inside the horizontal and vertical horizontal supports 126 and 127. Ends placed on the receiving portion 128 is preferably formed of "b" or "a".

The shape of the heat shield plate 140 as described above is formed in consideration of thermal expansion and can be easily implemented by those skilled in the art to which the present invention belongs.

In addition, the adjusting unit 130 is a rib 131 is formed in the lower inner side of the horizontal and vertical horizontal support (126,127) as shown in Figure 4a, the bent rib 131 is fitted to the adjusting unit 130 In the horizontal and vertical horizontal support 126, 127 is composed of a stopper 132 is fixed to the lower portion by the welding means so as to be able to flow.

The injection means 150 is a blower 151 is installed in each of the processing chamber (100, 200, 300, 400) as shown in FIG. 2 and the hot air in the inner chamber 120 by the blower 151 to the injection target material (X) It is composed of a spray passage 152 for.

As shown in FIG. 1A or 2 and 3, the air regulating means 160 includes a horizontal combustion pipe 161 installed to be located above the processing chambers 100, 200, 300, and 400, and is perpendicular to the horizontal combustion pipe 161. It consists of a vertical combustion pipe 162 connected to each processing chamber (100, 200, 300, 400) and the control valve 163 installed in the vertical combustion pipe (162).

That is, the horizontal combustion pipe 161 is a cylindrical pipe as shown in FIG. 1a or 2nd part is formed to be exposed to the outside, a part of the pipe is gradually reduced in diameter is located in each chamber (100, 200, 300, 400) It is installed so as to, the vertical combustion pipe 162 is installed in the gradually decreasing diameter portion, the control valve 163 is installed in the vertical pipe 162.

In the continuous heat treatment apparatus 1 of the present invention configured as described above, as illustrated in FIG. 2, when a controller (not shown) signals an “on” signal, the workpiece X is transferred from the transfer apparatus 10. In the transfer process, the heating device 110 installed in each chamber 100, 200, 300, 400, that is, a burner heats each processing chamber and gradually heats up the internal chamber 120 installed in the processing chamber by heating the air applied to the processing chamber. The heat heated in the inner chamber 120 is sprayed onto the workpiece X by the blowing fan 151 through the injection passage 152, so that the workpiece is uniformly heated to a preset temperature. Done.

In this case, each of the processing chambers 100, 200, 300, and 400 maintains a predetermined temperature, that is, the temperature of each processing chamber is gradually lower than that of the first processing chamber 100, so that the material to be treated X may be gradually heat treated under a uniform temperature. It was.

The present invention is heat-treated at a uniform temperature by the blowing fan and the burner installed in the processing chamber while passing through a plurality of processing chambers while continuously transporting a large amount of metal material to be treated, such as hardness, toughness, etc. It has the effect to improve the property and to provide a stronger and more durable treatment.

Simple modifications and variations of the present invention can be readily used by those skilled in the art, and all such variations or modifications can be considered to be included within the scope of the present invention.

Claims (8)

A metal material to be processed apparatus 20 having a means for forwarding a plurality of metal to be processed materials X coming in through the inlet 10 step by step; And a plurality of processing chambers (100, 200, 300, 400) installed on the upper portion of the workpiece to be transported by the transfer device to inject heated air, wherein each of the processing chambers (100, 200, 300, 400) heats the metal workpiece to a uniform temperature. The heating device 110, the inner chamber 120 for collecting the hot air ignited from the heating device 110, the injection means 150 for injecting the hot air in the chamber 120 on the workpiece In the continuous heat treatment apparatus consisting of, and the air conditioning means 160 for controlling the air flow between the processing chamber (100, 200, 300, 400) and the outside air, The air control means 160 is a horizontal combustion pipe 161 is installed to be located above the processing chamber (100, 200, 300, 400); A vertical combustion pipe 162 connected vertically to the horizontal combustion pipe 161 and installed to communicate with each of the processing chambers 100, 200, 300, and 400; And It consists of a control valve 163 installed in the vertical combustion pipe 162, The inner chamber 120 has a vertical rectangular frame by the horizontal and vertical horizontal frames 121 and 122 and the vertical frame 123, but a plurality of vertical horizontal frames 122 are arranged between the horizontal and horizontal frames 121, and the like. Respectively installed at intervals, and each of the vertical horizontal frames 122 has a support 124 suspended therefrom, each connecting portion 125 installed horizontally and vertically at one end of the support 124; Horizontal and vertical horizontal support (126, 127) are installed side by side between the connecting portion 125; Adjusting unit 130 for adjusting the horizontal and vertical horizontal support (126,127) contraction, expansion according to the connection or temperature change thereof; And It is installed between the horizontal and vertical horizontal support (126, 127) consists of a heat shield plate 140 that is horizontally contracted and expanded in accordance with the temperature change, The injection means 150 is a blower 151 installed in each of the processing chamber (100, 200, 300, 400); And an injection passage 152 for injecting hot air in the inner chamber by the blower 151 onto the workpiece. delete delete delete         According to claim 3, The control unit 130 is ribs (131) formed bent in the inner side of the horizontal and vertical horizontal support (126, 127); And the stopper 132 welded and fixed to the lower portion of the adjusting portion 130 to allow the horizontal and vertical horizontal supports 126 and 127 to flow in the state where the bent rib 131 is fitted to the adjusting portion 130. Continuous heat treatment device. The continuous heat treatment apparatus according to claim 3, wherein the thermal barrier plate has a plurality of bent portions continuously formed in the same shape in cross section. The continuous heat treatment apparatus according to claim 3, wherein the thermal barrier plate has a curved portion continuously formed in various cross sections. The continuous heat treatment apparatus according to claim 1, wherein the temperature in each of the processing chambers (100, 200, 300, 400) is gradually lowered.

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