KR20090109695A - Underground-type furnace - Google Patents

Abstract

PURPOSE: An underground-type furnace is provided to reduce the cooling time by minimizing the time for transporting a work piece by locating a thermal process furnace close to a furnace. CONSTITUTION: An underground-type furnace comprises a crane(30), a furnace(100), an opening and closing part, an on-off control part(300), and a water tub(400). The crane includes a hook to transports a work piece. The furnace is buried in an underground and has a feed port with an opened upper part to charge the work piece moved with the crane. The opening and closing part opens and closes the feed port of the furnace. The on-off control part controls the operation of the opening and closing part. The water tub is buried near the furnace.

Description

Underground Heat Treatment Equipment

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat treatment furnace, and more particularly, to an underground heat treatment furnace that enables high heat efficiency and at the same time a solid solution heat treatment.

In general, a heat treatment furnace refers to a furnace in which a heat treatment process is performed to obtain a desired property by heating a workpiece to a constant temperature.

Such a heat treatment furnace is provided with a furnace main body and a heating portion and a cooling portion for heating a workpiece to a predetermined temperature therein. In the conventional case, a tunnel-type heat treatment furnace and a batch type are formed according to the shape thereof. The heat treatment furnace of is generally used.

Among them, the tunnel-type heat treatment furnace refers to a method of performing heat treatment of a to-be-processed object by applying heat by a heater while mounting and transporting a to-be-processed object in a rack.

Tunnel type heat treatment furnace has the advantage of easy temperature control, but the length of the heat treatment furnace is very long to reach several tens of meters, which causes various problems in the factory layout. It is difficult to implement heat treatment conditions.

On the other hand, a batch furnace (batch furnace) is also known as a batch type furnace (Batch Type Furnace), a furnace installed alone to charge and heat treatment of a relatively complex shape by the operator's manual work.

This heat treatment method is a heat treatment method suitable for creating quality enhancement by incorporating design technology for customer requirements.

That is, the batch type heat treatment furnace is mounted in a multi-stage rack to be processed and loaded into the batch heat treatment furnace, and heat-treated to a desired temperature by a heater and then brought back to the outside of the heat treatment furnace.

However, since the batch heat treatment furnace has to maintain a constant temperature, and then carry the second target heat treatment or cooling again after bringing the object again, the continuous process is difficult and there is a sudden change in temperature due to exposure to room temperature. There is a problem that can be.

In addition, it is difficult to find a large heat treatment furnace suitable for an object to be processed such as a petrochemical stainless steel pressure vessel, a structure, a heat exchanger, and the like, which are being enlarged in recent years.

Because a large number of large-size solid solution heat treatment furnaces using electricity are being released for heat treatment of such large workpieces, the heat treatment costs are enormous since the heat treatment of energy sources requires enormous power consumption. This is because there is a problem that the efficiency is reduced due to the rise.

Moreover, as the volume of the heat treatment furnace increases, there is a problem in that the heat loss from which the heat of the inside escapes to the outside increases.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an object thereof is to provide a heat treatment furnace capable of heat treatment of a large workpiece.

In addition, there is another purpose to increase the thermal efficiency by minimizing the heat loss from the heat treatment furnace to the outside.

In addition, there is another purpose to reduce the heat treatment ratio and at the same time save energy resources by making the GAS available to the heat source of the heat treatment furnace.

The present invention for achieving the above object is a crane having a hook to transport the object to be processed, the charging portion is formed in the upper side is formed to be buried underground to be charged to the object to be carried by the crane Opening and closing part provided to open and close the furnace, the charging part of the heating furnace, the opening and closing control part provided to control the opening and closing part and the water tank buried close to the heating furnace to heat-treat the workpiece heated in the heating furnace. It provides an underground heat treatment apparatus, characterized in that the configuration is included.

As described above, the underground heat treatment furnace of the present invention has the following effects.

First, by replacing the electrical energy as an energy source for heat treatment, by using high-efficiency GAS energy, it not only saves energy resources, but also has an environmentally friendly effect.

Second, by embedding the furnace in the basement surrounded by concrete in order to minimize the heat radiation energy from the furnace, it is possible to realize not only the fuel saving but also the heat treatment for the large workpiece, so that the large-sized solution heat treatment can be realized.

Third, by forming a heat treatment furnace in close proximity to the heating furnace has an effect that can minimize the time required to transport the object to be processed to shorten the quenching time.

Hereinafter, with reference to the accompanying drawings, the underground heat treatment furnace according to the present invention will be described.

1 is an exemplary view showing an operating state of a heat treatment furnace according to an embodiment of the present invention.

2 is a perspective view showing the overall configuration of a heat treatment furnace according to an embodiment of the present invention.

3 is a perspective view showing a heating furnace and a water tank of the heat treatment furnace according to an embodiment of the present invention.

Figure 4 is a perspective view showing a rotational cover of the heat treatment furnace according to an embodiment of the present invention.

5 is a perspective view showing a movable cover of a heat treatment furnace according to an embodiment of the present invention.

1 to 5, the underground heat treatment furnace according to the present invention is roughly divided into a heating furnace 100, an opening and closing part 200, an opening and closing control part 300, a water tank 400, and a crane 30.

The heating furnace 100 has a space formed therein to allow the workpiece (not shown) to be seated therein, and forms a concrete structure (not shown) on the outside of the heating furnace 100. ), The warming effect can be enhanced.

In addition, the fireproof member 110 is installed on the bottom of the concrete structure, and the thermal insulation material 120 is pressed on the inner wall of the heating furnace 100 using a fastening member such as a bolt (not shown) to further secure the warming effect. It can increase.

In addition, the heating device 140 is installed through several places along the upper edge of the heating furnace 100, which is a part exposed to the ground, it is preferable to install so as to face the burner 140 from both sides.

At this time, the injection hole of the burner 140 is installed to be inclined downward and the fuel is formed to enable a solubilization heat treatment (Solution furnace) by using the GAS fuel.

Opening and closing part 200 is largely divided into a rotatable cover 210 and the movable cover 220.

The rotatable cover 210 is hinged from an upper end side of the heating furnace 100 and is rotated by the opening and closing control unit 300 to be described later to open and close the charging unit 130 of the heating furnace 100.

At this time, the rotatable cover 210 forms a rotatable cover structure 211 by connecting a plurality of support frames (not shown), the rotatable cover structure 211 is a thermal insulating material 212 is installed at the bottom. It is formed to support it.

In addition, the locking member 213 is formed on the upper side of the pivotal cover structure 211 so that the end of the wire 20 of the winding member 330 to be described later can be fixed.

At this time, it is preferable that the engaging member 213 is formed at least two or more in a ring shape, each connecting one end of the connecting string (not described) to the engaging member 213 and each other end annular ring (not described) It is preferable to disperse the weight of the rotatable cover 210 by fixing the end of the wire 20 by connecting them to each other) or to prevent stable vibrations.

In addition, the movable cover 220 opens and closes the charging unit 130 of the heating furnace 100 by horizontally reciprocating along the rail 40 formed on the ground to the outside of the heating furnace 100.

At this time, the movable cover 220 can be moved by the trolley 230 provided with wheels (not described) moving along the rails 40 on both sides.

The trolley 230 is integrally moved by a cross frame 232 which supports the reinforcement frame 231 and the reinforcement frame 231 of both sides formed to be connected to each other on each side.

Here, the heat insulating material 234 is installed at the lower end of the cross frame 232.

At the same time, the vertical reinforcing device 240 is installed on one side of the reinforcement frame 231 so as to support the lower end of the above-described cross frame 232 and move up and down.

At this time, the vertical transfer device 240 is engaged with the front and rear ends of the coupling 242 by the coupling 242 extending from the control motor 241 to the front and rear sides of the trolley 230 and interlocked with each other. The switching device 243 is positioned so as to.

Here, the switching device 243 is a device that is typically used to move the package up and down, and as the control motor 241 is selectively driven relative to the rotation direction, both couplings 242 are rotated, the coupling ( By the rotation of the 242, a plurality of gears (not shown) combined in the switching device 243 is rotated so that the rotational movement is converted into the vertical movement.

That is, the thermal insulation material 234 coupled to the cross frame 232 by the vertical transfer device 240 is moved up and down, so as to more closely and easily open and close the charging unit 130.

In addition, a plurality of support frames (not shown) are interconnected on the upper side of the cross frame 232 to form a movable cover structure 235 so as to be supported with higher strength.

The rotatable cover 210 and the movable cover 220 may open and close half of the charging unit 130, respectively, so as to be quickly opened and closed.

And, the opening and closing control unit 300 is installed to control the opening and closing of the pivotal cover 210, the opening and closing control unit 300 is largely divided into a support frame 310, a rotary pulley 320, the winding member 330.

The support frame 310 is fixed to the ground spaced apart from the pivotal cover 210 by a predetermined distance.

At this time, the end of the wire 20 wound or unwound by the winding member 330 formed at the bottom of the support frame 310 is fixed to the locking member 213 of the pivotal cover 210, the support frame 310 The charging unit 130 of the heating furnace 100 is opened and closed by rotating the rotatable cover 210 in a pulley manner over the wire 20 to the rotary pulley 320 formed at the top of the).

The winding member 330 may use a winch or winch.

In addition, by forming a further rotating pulley (not shown) on both sides of the rotating pulley 210 of the support frame 310 to hang the heavy material (not shown) to the rotatable cover 210 as a separate wire (not shown) A locking member (not shown) may be further formed at a corresponding position to connect the same so as to easily support the weight of the pivotal cover 210.

Then, the water tank 400 is formed close to the heating furnace 100 and having a size corresponding to the volume of the heating furnace 100.

The water tank 400 is used to carry the object to be processed, and then to quench or slow cooling the object.

At this time, the water tank 400 is formed so as to be close to the heating furnace 100 to minimize the time to transport the processing object from the heating furnace 100 when the quenching to be processed to shorten the quenching time It is preferable.

In addition, a crane (not shown) provided with a hook 30 from above the heating furnace 100 and the water tank 400 may be installed to transport the workpiece.

Referring to the drawings the process of the heat treatment of the workpiece using the underground heat treatment furnace configured as described above is as follows.

As shown in FIG. 1, the movable cover 220 is lifted by the vertical transfer device 233 and then moved along the rail 40 toward the water tank 400.

Thereafter, the winding member 330 of the opening and closing control unit 300 is operated to open the pivotal cover 210.

Thereafter, the hook 30 of the crane is fixed to lock the workpiece, and the workpiece is loaded into the heating furnace 100.

Thereafter, the rotatable cover 210 and the movable cover 220 are sealed.

Thereafter, the heating apparatus 140 is operated to heat the inside of the heating furnace 100 to perform heat treatment on the object to be processed.

After the operation of the heating furnace 100 is stopped, when the quenching treatment is required for the workpiece, the pivoting cover 210 and the movable cover 220 are opened, and the workpiece is transported to the hook 30 for the water tank. It is drawn into the interior of 400.

The above embodiments are only for explaining the present invention, and the scope of the present invention is not limited to the embodiments, and may be modified or modified by those skilled in the art within the scope of the present invention defined by the appended claims.

For example, the shape and structure of the elements of each component specifically shown in the embodiment of the present invention can be modified.

1 is an exemplary view showing an operating state of a heat treatment furnace according to an embodiment of the present invention.

Figure 2 is a perspective view showing the overall configuration of the heat treatment furnace according to an embodiment of the present invention.

Figure 3 is a perspective view showing a heating furnace and a water tank of the heat treatment furnace according to an embodiment of the present invention.

Figure 4 is a perspective view of a rotary cover of the heat treatment furnace according to an embodiment of the present invention.

Figure 5 is a perspective view showing a removable cover of the heat treatment furnace according to an embodiment of the present invention.

Explanation of the main symbols used in the drawings

10: concrete 20: wire

30: crane hook 40: rail

100: heating furnace 110: fireproof member

120,212,234: thermal insulation material 130: charging

140: burner 200: opening and closing part

210: Rotating cover 211: Rotating cover structure

220: removable cover 230: cart

231: reinforcement frame 232: cross frame

240: vertical transfer device 241: control motor

242 coupling 243 switching device

300: opening and closing control unit 310: support frame

320: rotating pulley 330: winding member

400: tank

Claims (9)

A crane with a hook for carrying the workpiece; A heating furnace having an upper charged portion formed to be filled with the object to be transported by the crane and being buried underground; An opening and closing portion provided to open and close the charging portion of the heating furnace; An opening and closing control unit provided to enable driving control of the opening and closing unit; And Underground heat treatment apparatus characterized in that it comprises a water tank embedded in close proximity to the heating furnace so as to heat-treat the object to be heated in the heating furnace. The method of claim 1, wherein the heating furnace Refractory member forming the bottom surface of the heating furnace; A side wall member formed upright along an edge of the fireproof member to surround an inner space; Thermal insulation insulating material is formed by pressing on the inner side of the side wall member; Underground heat treatment furnace characterized in that the side wall member comprises at least two burners formed through. The method according to claim 1, wherein the opening and closing portion A hinged cover coupled to one side of the heating furnace and configured to open and close a portion of the charging unit; Underground heat treatment furnace characterized in that it comprises a movable cover reciprocating along the rail on the ground back and forth to open and close the other part sealed by the pivotal cover. The method of claim 3, wherein the rotary cover A rotatable cover structure in which a plurality of support frames are interconnected to support a load; At least two locking members formed on an upper side of the pivotal cover structure; And Underground heat treatment characterized in that it comprises a thermal insulation insulating material formed on the bottom of the pivotal cover structure. The method of claim 3, wherein the removable cover A trolley having wheels to reciprocate back and forth along the rail and having a plurality of reinforcing frames connected integrally to be mutually supported on both sides; A cross frame formed to connect both ends of the reinforcement frame and be parallel to the ground; A vertical transfer device configured to vertically move up and down while supporting both lower ends of the cross frame; Insulation material formed at the bottom of the cross frame; The basement heat treatment furnace, characterized in that the top of the cross frame further comprises a movable cover structure that is connected to a plurality of support frames to support the load. The method of claim 5, wherein the vertical transfer device A control motor fixed to one end of the cross frame; A coupling symmetrical about the control motor and driven by the control motor; A switching device coupled to and coupled to both ends of the coupling; An underground heat treatment furnace, comprising: a guide shaft interlocked from the switching device and configured to vertically move vertically as the coupler rotates by the switching device. The method according to claim 1, wherein the opening and closing control unit A support frame fixed to the ground and formed to support the weight of the rotatable cover; A rotating pulley fixed to an upper side of the support frame and formed to rotate; It includes a hoisting device fixedly installed on the lower side of the support frame, the end of the wire wound by the hoisting device is fixed to the locking member of the pivoting cover, opening and closing the pivotable cover by operating the hoisting device over the rotating pulley Underground heat treatment furnace, characterized in that. The method according to claim 1, wherein the tank The underground heat treatment furnace, characterized in that formed in a size corresponding to the volume of the heating furnace, the side wall or the bottom surface is formed of a concrete material to provide a space for heat treatment of the object. The method according to claim 1, The side wall member is an underground heat treatment furnace, characterized in that made of a concrete material.

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