KR20020014132A - Coil cart for horizontal hot annealing furnace - Google Patents

Abstract

PURPOSE: A coil cart for a horizontal hot annealing furnace is provided in which impulsive forces applied to the front and back corners of the coil cart are greatly alleviated by a coil sleeve so as to prevent damage of the coil cart, and heat radiation into the lower part through the lower part of both sides of the coil cart is effectively blocked so as to improve heat efficiency. CONSTITUTION: In a coil cart for a horizontal hot annealing furnace which is equipped with a hollow tunnel type annealing furnace body, and into which a plurality of coils are loaded and heat treated in the hydrogen atmosphere, the coil cart for the horizontal hot annealing furnace is characterized in that upward inclined surfaces(35) facing from the center of the cart body(10) to stoppers(30) in the front and back of the cart body(10) are respectively formed at upper corner parts of both sides of a cart body(10) on which both ends of a coil sleeve(5) are stationed so that a speed of the coil sleeve(5) is reduced at the area adjacent to the stoppers(30) by gravity when a coil is moved back and forth, thereby greatly reducing impulsive forces collided with the stoppers(30).

Description

Balance for high temperature annealing furnace {COIL CART FOR HORIZONTAL HOT ANNEALING FURNACE}

The present invention relates to a bogie used in a horizontal high temperature annealing furnace, and more particularly, to greatly reduce the impact force applied to the front and rear edges of the bogie by a coil sleeve during bogie flow to prevent breakage of the bogie, It relates to a bogie for a horizontal high temperature annealing furnace that is improved to effectively block the heat dissipation to the bottom through the lower side of both sides to improve the thermal efficiency.

In general, the annealing furnace for heat-treating the coil is vertically charged into the wall of the arc-shaped refractory structure, and the inside of the annealing furnace is filled with 95-100% hydrogen gas for heat treatment. Here, the vertical annealing furnace means that the width direction of the coil is located vertically in the annealing furnace. Unlike the above, the method in which the width direction of the coil is kept horizontal is called a horizontal annealing furnace.

This annealing furnace is charged with hydrogen (Hydrogen) as an atmospheric gas loaded on the bogie at a high temperature of up to 1,200 ℃, and annealing for at least 24 to 136 hours, which is annealing the heat-treated coils It will be withdrawn from the furnace.

On the other hand, such a vertical annealing furnace is to charge the coils vertically and heat treatment, after the heat treatment has a problem that both edges of the coil is damaged. Accordingly, the inventors of the present invention, in order to prevent the coil deformation problem caused by the vertical annealing furnace, the horizontal annealing furnace as shown in Figure 6 in the Republic of Korea Patent Application No. 2000-30720, 2000-35395, and 2000-35573 We have filed a patent application on

The horizontal annealing furnace 200 proposed by the present inventors and the co-inventors has a hollow tunnel-type annealing furnace body 210, and a plurality of coils 220 are inserted therein to heat-treat under a hydrogen atmosphere. As a high temperature annealing furnace, the lower side of the main body 210 is provided with a flow mechanism 210 for providing a flow force before and after the coil 220 loaded in the main body 210 to transfer the annealing furnace 200. After, by lifting up and flowing, the coil 220 in the annealing furnace 200 is uniformly heat treated while flowing.

In the flow annealing furnace 200 as described above, a plurality of charging carts 250 carrying the coils 220 are provided therein, and the charging carts 250 have fitting protrusions 252 formed on the front side thereof. The fitting protrusions 252 are configured to be respectively inserted into the fitting grooves 254 provided on the rear side of the cart 250, so that the carts 250 inserted into the main body 210 are in close contact with each other and the cart 250 is fitted. ) Is formed on the upper side where the coil 220 is charged, the stepped portion 258 on which both ends of the sleeve 256 on which the coil 220 is wound is mounted is formed, and these stepped portions 258 are horizontal surfaces extending around a predetermined length. By forming a stopper 260 at each end thereof, the coil 220 wound around the sleeve 256 is rollable on a horizontal surface of the stepped portion 258, and a stopper formed at the stepped portion 258. Of the stopper 260 so that it can no longer be rolled and stopped by 260. This has a structure are properly selected.

However, the trolley 250 used in such a horizontal annealing furnace has a plurality of coils 220 mounted on the upper side, as shown in FIG. However, it had some defects as follows.

That is, these conventional trolleys 250 have a sleeve 256 in which the coils 220 are wound when the coil 220 rolls on the trolley 250 before and after the left and right flows of the annealing furnace 200. ) Collided with the stopper 260 before and at the upper end of the cart 250 to break the stoppers 260. These not only lowered the life of the trolley 250 but also prevented stable annealing operation and increased the risk of equipment accidents.

In addition, such a conventional trolley 250 has both sides 250a of the trolleys simply adjacent to both side walls (not shown) of the annealing furnace 200, respectively, so that the coil 220 side of the upper portion of the trolley 250 is covered. The heat on the side of 270 dissipates to the lower portion of the trolley 250 to uneven heat applied to the coil 220.

The present invention is to solve the conventional problems as described above, the object is to greatly reduce the impact force applied to the front and rear edge of the balance by the coil sleeve during the flow of the balance to prevent damage to the balance, both sides of the balance It is to provide a bogie for a horizontal high temperature annealing furnace which is improved to effectively block heat dissipation from the bottom through the bottom to uniformly apply heat to the coil, and to prevent heat loss, thereby greatly improving the thermal efficiency of the annealing operation. .

1 is a block diagram showing a bogie for annealing furnace according to the present invention;

2 is an external perspective view of a trolley for annealing furnace according to the present invention;

3 is an operational state diagram of a trolley for a horizontal annealing furnace according to the present invention, a side view showing the trolley and the coil;

Figure 4 is a front sectional view showing a bogie for a horizontal annealing furnace according to the present invention;

5 is a perspective view showing a balance according to the prior art;

6 is an explanatory view showing a horizontal annealing furnace according to the prior art.

Explanation of symbols on the main parts of the drawings

5 ..... Coil sleeve 10 ..... Balance body

12 .... Wheel 14 ..... Rail

30 .... Stopper 35 ..... Slope

40 .... coil 42 ..... recess

45 .... flange 52 ..... step

55 .... Guideway 70 ..... Cover

200 ... Annealing Furnace

The present invention to achieve the above object,

In a bogie for a high temperature horizontal annealing furnace having a hollow tunnel-type annealing furnace body, in which a plurality of coils are inserted and heat-treated under a hydrogen atmosphere, the upper edges of both sides of the bogie body, on which both ends of the coil sleeve are mounted, Horizontal induction annealing furnace, characterized in that the upward inclined surface from the center toward the front and rear stoppers are formed respectively, and the coil sleeve is decelerated at the vicinity of the stopper by gravity when the coil is moved forward and backward, thereby greatly reducing the impact force impinging on the stopper. By providing a loan.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

As shown in FIGS. 1 and 2, the trolley body 10 on which both ends of the coil sleeve 5 are mounted is provided, and the trolley body 10 is provided. The lower side of the plurality of wheels 12 is mounted is movable on the rail (14). In addition, upper slopes 35 are formed at both upper edge portions of the trolley body 10 toward the front and rear stoppers 30 from the center thereof.

Here, the inclined surface 35 is the center portion of the lowest position, which is formed in the center of the trolley (1) when the coil 40 is loaded over the trolley (1), the coil 40 is its own weight By the center of the inclined surface 35, that is to be always located in the center of the balance body (10). This can be seen that when loading the coil 40 on the trolley 1 with a crane (not shown), it is possible to always have a stable mall.

In addition, in the trolley of the present invention, in order to flow back and forth on such an upward inclined surface 35, concave grooves 42 are formed in annular shapes at both ends of the coil sleeve 5 in which the inclined surface 35 is located. . The concave groove 42 has a central body portion 42a of the sleeve 5 having a larger diameter than both end portions, and a flange 45 is formed at both ends of the sleeve 5 by bolts or the like. Thus, due to the enlarged diameter of the central portion of the sleeve 5 and the flange 45, concave annular grooves 42 are formed at both ends of the sleeve 5, such annular concave grooves 42. Positioned on the upward inclined surface 35 of the bogie body 10 is to achieve a flow before and after the stable coil 40.

On the other hand, the trolley 1 of the present invention effectively blocks heat from being radiated to the lower portion of the trolley 1 through lower portions of both sides of the trolley to equalize the heat applied to the coil 40, and greatly increase the thermal efficiency of the annealing operation. In order to improve, the space | interval between the both sides of the trolley | bogie 1 and the wall of an annealing furnace is interrupted | blocked by several heat insulation refractory boards.

To this end, the trolley 1 of the present invention, as shown in Figure 4, to form a plurality of stepped 52 along the longitudinal direction before and after both sides of the trolley 1, between the stepped 52 The concave guide grooves 55 are formed in the longitudinal direction of the plurality of trolleys 1. In addition, a heat insulation refractory plate 61 protruding from the side wall 200 a of the annealing path 200 is inserted into the guide groove 55, respectively, and the upper and lower sides between the upper and lower sides of the trolley 1. Shut off the flow path.

That is, the heat insulation refractory plate 61 is a plurality of long extending in the longitudinal direction before and after the annealing furnace wall (200a), the edges of these heat insulation refractory plate 61 is a plurality of concave guide groove of the trolley (1) Disposed in a coincident state, and accordingly, the bogie 1 is moved to charge the coil 40 into the inside of the annealing furnace 200 or the bogie 1 is drawn out to withdraw the coil 40. When moved, the guide groove 55 of the trolley 1 is moved along the heat insulation refractory plate 61 so that there is no obstacle to the movement of the trolley 1.

Reference numeral 70 is a coil cover.

When the annealing operation of the coil 40 is performed in the annealing furnace, the trolley 1 of the present invention configured as described above has a coil sleeve (a) when the annealing furnace is inclined before and after the coil 40 flows on the bogie 1. 5) is moved to the front and rear stopper 30, gravity is applied by the upward inclined surface 35, the speed is reduced in the vicinity of the stopper 30, the impact force collided with the stopper 30 is greatly reduced. More preferably, the inclination angle θ of the upwardly inclined surface 35 is adjusted in size so that the coil sleeve 5 is moved toward the stopper 30 (in the dotted line in FIG. 3). You can do so little impact on.

When the impact force is reduced on the stopper 30 as described above, the stopper 30 is prevented from falling off of the refractory, so that its service life is greatly increased, and the replacement cycle can be extended.

In addition, since the concave grooves 42 are formed at both ends of the coil sleeve 5 which are in contact with each other on the upwardly inclined surface 35, the trolley 1 of the present invention more stably flows the coil 40. Can be achieved.

In addition, in the present invention, a plurality of thermal insulation refractory plates 61 protruding from the side walls of the annealing furnace are inserted into the guide grooves 55 on both sides of the trolley 1, respectively, between the upper and lower sides of the trolley 1, respectively. By blocking the flow path, it is possible to effectively prevent heat from radiating heat from the upper portion of the trolley 1 to the lower side through both lower portions of the trolley 1, to make the heat applied to the coil 40 uniform, The thermal efficiency can be greatly improved.

As described above, according to the present invention, the impact force applied to the front and rear edges of the trolley 1 by the coil 40 sleeve 5 during the flow of the trolley 1 is greatly alleviated to prevent breakage of the trolley 1. In addition, stable flow of the coil sleeve 5 before and after is possible, and heat is applied to the coil 40 by effectively blocking heat dissipation to the lower portion of the trolley 1 through both lower portions of the trolley 1. The improved effect is obtained to make it uniform and to prevent heat loss, thereby greatly improving the thermal efficiency of the annealing operation.

Claims (4)

In the bogie for a high-temperature horizontal annealing furnace having a hollow tunnel-type annealing furnace body, in which a plurality of coils are charged and heat-treated under a hydrogen atmosphere, the bogie body 10 on which both ends of the coil sleeve 5 are mounted is mounted. On both upper corners, upward inclined surfaces 35 are formed from the center toward the stopper 30 in front and rear, respectively, so that the coil sleeve 5 near the stopper 30 by gravity when the coil 40 flows before and after. Bogie for a horizontal high temperature annealing furnace, characterized in that the speed is reduced and the impact force impinging on the stopper 30 is greatly reduced. 2. The inclined surface (35) according to claim 1, wherein the inclined surface (35) has its center portion positioned at the lowest, and when the coil (40) is loaded onto the trolley (1), the coil (40) is centered on the inclined surface (35) by its own weight. The bogie for horizontal high temperature annealing furnace, characterized in that configured to be located in the center of the bogie body (10). According to claim 1, Concave grooves 42 are formed at both ends of the coil sleeve 5, respectively, the concave grooves 42 have a diameter of the central body portion 42a of the sleeve 5 than both ends While being largely formed, at the same time, the flange 45 is connected to both ends of the sleeve 5 by a bolt or the like, and is formed due to the enlarged diameter of the central portion of the sleeve 5 and the flange 45. The concave grooves 42 are horizontally annealed bogie, characterized in that configured to achieve the front and rear flow of the stable coil 40 by being located on the upward inclined surface 35, respectively. According to claim 1, wherein a plurality of step (52) is formed along both longitudinal sides of the trolley (1) along the longitudinal direction, and the guide grooves 55 concave between the step (52) a plurality of trolleys (1). And a heat insulation refractory plate 61 protruding from the side wall 200a of the annealing path 200 are inserted into the guide grooves 55, respectively, so that the upper and lower sides of the trolley 1 are formed. By blocking the upper and lower flow paths therebetween, the heat is effectively prevented from dissipating heat to the lower portion of the trolley 1 through both lower portions of the trolley, the heat applied to the coil 40 is uniform, and the thermal efficiency of the annealing operation. Bogie for horizontal high temperature annealing furnace, characterized in that configured to improve.