JPH07252520A - Carrying device in heating furnace - Google Patents

Abstract

PURPOSE:To enable the carrying in a furnace without damaging a rolling material by pushing a movable rider for laying the rolling material into the furnace by using a pusher and delivering this material onto skid rails. CONSTITUTION:Many pieces of the skid rails 16 are fixed one by one over the whole length onto plural pieces of skid pipes 13 constituting carrying course base of a billet 12 being rolling material. The movable riders 17 as a receiving table for billet 12 are slidably laid on each skid rail in the linking condition. The pusher 19 is arranged near the inlet 14 of the furnace and the movable rider 17 reached to the pushing position is pushed in the furnace by one stroke of a rod 18 and delivered onto the skid rail. At the time of stopping the furnace operation, the empty movable riders 17 are continued to feed in the furnace to make no billet 12 condition in the furnace, and thus, the development of defective products caused by the remained billet 12 in the furnace is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating furnace conveying device, and more specifically, it can convey rolled material in the furnace without any scratches, and can eliminate the remaining of the rolled material in the furnace when the furnace is stopped. Accordingly, the present invention relates to a heating furnace transfer device capable of eliminating the generation of defective products due to remaining in the furnace and improving workability during maintenance in the furnace.

[0002]

2. Description of the Related Art A rolling furnace is provided in a rolling line for heating a rolling material such as a billet or a slab to a predetermined temperature before sending the rolling material to a rolling mill. Conventionally, as a type of heating furnace, the rolling material is placed directly on the skid rails fixed to the skid pipes arranged in the furnace body and pushed into the furnace by a constant stroke with a pusher to move the furnace from the furnace inlet. A pusher type furnace that conveys to an outlet is known.

[0003]

However, in the above-mentioned prior art, since the material is directly placed on the skid rail as described above, the lower surface of the rolled material pushed by the pusher becomes a sliding surface, and There was a problem that it was easily damaged.

Since the rolling material itself pushes other rolling materials in the furnace body as described above, a large number of rolling materials remain in the furnace when the furnace is stopped and remain as the temperature inside the furnace lowers. There was a quality problem because the rolled material cooled. In addition, if a large number of heavy rolled materials remain in the furnace in this manner, it is difficult to perform maintenance when performing maintenance inside the furnace, so that there is a problem that a large amount of labor is required to carry them out.

The present invention has been made in view of the above circumstances. The rolled material can be conveyed in the furnace without being scratched, and remaining of the rolled material in the furnace when the furnace is stopped can be eliminated. An object of the present invention is to provide a heating furnace transfer device capable of eliminating the generation of defective products due to remaining and improving workability during maintenance in the furnace.

[0006]

A method according to the above-mentioned object.
The heating furnace transfer device described above is arranged in the furnace body at a predetermined interval from each other, and is fixed to a large number of skid pipes that form a conveyance path stand for the rolled material, and the upper portions of the skid pipes for substantially the entire length. It is possible to slide on a large number of skid rails and each of the skid rails.
A large number of movable riders on which the rolled material is placed, and the movable riders placed near the furnace inlet and sequentially placed on the ends of the skid rails on the furnace inlet side,
The pusher is configured to be pushed into the furnace by the stroke of the rod.

Further, the heating furnace transfer device according to claim 2 is
The heating furnace transfer device according to claim 1, wherein a friction reducing member is interposed between the skid rail and the movable rider.

Further, the heating furnace carrying device according to claim 3 is the heating furnace carrying device according to claim 1 or 2, wherein
A return conveyor is provided around the furnace body to sequentially return the movable rider extruded from the furnace outlet to the movable rider pushing position of the furnace inlet.

[0009]

When the movable lidar is pushed into the furnace by one stroke of the rod by the pusher, the movable lidar slides on the skid rail with its lower surface as the sliding surface. Therefore, the lower surface of the rolled material placed on the movable lidar at a predetermined position is not scratched by the transportation in the furnace.

When the furnace is stopped, the empty movable lidar on which no rolling material is placed is sequentially pushed into the furnace for a while before the furnace is stopped, so that there is no rolling material in the furnace when the furnace is stopped. Since the condition can be created, the occurrence of defective products due to the remaining in the furnace can be eliminated, and when performing the in-furnace maintenance, it is not necessary for the worker to carry out the remaining heavy rolled material, and the workability of maintenance is improved. .

In particular, the heating furnace transfer device according to claim 2 is
When the movable rider is pushed into the furnace by the pusher, the friction reducing member is interposed between the skid rail and the movable rider. Can be extended and the load applied to the pusher can be reduced, so an inexpensive pusher with a relatively small output can be used.

Further, in the heating furnace carrying device according to the third aspect of the present invention, when the movable lidar is pushed out from the furnace outlet, the pushed movable lidar is sequentially returned to the movable lider pushing position on the furnace inlet side by the return conveyor. Therefore, it is not necessary for the operator to carry the movable riders after use to the furnace inlet by using a carrier and set the movable riders one by one at the movable rider pushing position.

[0013]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a schematic sectional view of a heating furnace conveying device according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of the same essential parts, FIG. 5 is an enlarged side view of the transfer machine, and FIG. 6 is an enlarged cross-sectional view of essential parts of a heating furnace transfer apparatus according to a second embodiment of the present invention.

As shown in FIGS. 1 and 2, a heating furnace conveying apparatus 10 according to a first embodiment of the present invention is an example of a rolled material, which is arranged in a furnace body 11 at a predetermined interval. The billet 12 has a plurality of skid pipes 13 that form a conveyance path stand. Both ends of each skid pipe 13 are projected to the outside of the furnace inlet 14 and the furnace outlet 15, and a large number of skid rails 16 made of heat-resistant cast steel are fixed to the upper portion over the entire length.

On each skid rail 16, a movable rider 17 made of heat-resistant cast steel and various refractory materials, which is a pedestal for the billet 12, is slidably mounted in a beaded state, and is connected to the furnace inlet. In the vicinity of 14, pushers 19 are provided to push the movable riders 17, which are sequentially mounted on the ends of the skid rails 16 on the furnace inlet 14 side, into the furnace by one stroke of each rod 18. As shown in FIG. 3, a return conveyor 20 is arranged around the furnace body 11 to sequentially pull back the movable rider 17 pushed out from the furnace outlet 15 to the movable rider pushing position a of the furnace inlet 14.

As shown in FIGS. 3 and 4, the billet 12 is placed on the movable rider 17 in the furnace inlet 14 side of the furnace body 11 so that the billet 12 extends from the furnace inlet 14 side to the inside of the furnace body 11. It is performed by the entrance roller table 23 and the transfer machine 24 arranged outside the furnace on the entrance side of the furnace. That is, the billet 12 is carried into the furnace body 11 by the charging roller table 23, and then the billet 12 is transferred to the furnace inlet 14 of the furnace body 11 by the transfer machine 24.
The movable riders 17 arranged in a line in the side Y direction are placed in series. As shown in FIGS. 3 and 5, in the transfer machine 24, the crank arm 24b is rotated by the rotation of the deceleration motor 24a, and the fork arm 24c having the base portion pivotally attached to the arm 24b is moved via the swing arm 24d. The billet 12 on the charging roller table 23 is transferred onto the movable rider 17 by moving back and forth so as to draw an ellipse.

Further, as shown in FIGS. 3 and 4, the movable rider 17 of the billet 12 in the furnace outlet 15 side of the furnace body 11 is moved.
The transfer machine 2 is located outside the furnace on the exit side of the furnace.
5 and an extraction roller table 26 extending from the furnace outlet 15 side of the furnace body 11 to the inside of the furnace body 11. The transfer machine 25 has the same structure as the transfer machine 24. The billet 12 conveyed to the furnace outlet 15 side of the furnace body 11 is placed on the extraction roller table 26 by the transfer machine 25, and is carried out of the furnace by the extraction roller table 26. Next, the pusher 19 and the return conveyor 20 will be described in detail with reference to FIG.

As shown in FIG. 3, in the pusher 19, a crank mechanism 29 is connected to an output shaft of a speed reducer 28 of a drive motor 27, and the crank mechanism 29 connects the six rods 1 to each other.
8 are attached at predetermined intervals. Drive motor 27
When the crank mechanism 29 is actuated by the above, the rods 18 are collectively put in and taken out, whereby the movable rider 17 at each movable rider pushing position a is pushed from behind by the rod 18 and pushed onto the corresponding skid rail 16. Be done.

Further, the return conveyor 20 has a furnace outlet 1
The movable rider 17 extruded from the furnace body 11 is conveyed to the corner of the furnace body 11 on the side of the furnace outlet 15 and extends in the Y direction. The furnace side conveyor 31 extending in the X direction that conveys to the corner of the body 11 on the furnace inlet 14 side, and the movable lidar 17 that is unloaded from the furnace side conveyor 31 are conveyed to each movable lider pushing position a. And a furnace inlet side conveyor 32 extending in the direction. As the belts of these conveyors 30 to 32, metal mesh belts are used so as to withstand the heating of the furnace body 11.

In the vicinity of the connecting portion between the furnace outlet side conveyor 30 and the furnace side surface side conveyor 31, the movable rider 17 reaching the end of the furnace outlet side conveyor 30 on the carry-out side is attached to the furnace side surface side conveyor by the projection of the rod 33a. A push-in cylinder 33 is provided for feeding to the carry-in side of the furnace 31, and the movable rider reaching the end of the carry-out side of the furnace-side conveyor 31 near the connection part between the furnace-side conveyor 31 and the furnace inlet-side conveyor 32. 17 is connected to the furnace inlet side conveyor 3 by the protrusion of the rod 34a.
A push-in cylinder 34 is provided for feeding to the carry-in side of 2.

Next, the operation of the heating furnace transfer device 10 according to the first embodiment of the present invention will be described. As shown in FIGS. 1 and 2, when the rod 18 of the pusher 19 is continuously advanced and retracted, the movable riders 17 that have reached the movable rider pushing positions a by the return conveyor 20 are sequentially moved by one stroke of the rod 18. It is transferred from the furnace inlet 14 onto each skid rail 16. This allows
The movable rider 1 previously mounted on the skid rail 16
7 are sequentially pushed into the furnace in a state of connecting beads.

On the other hand, as shown in FIGS. 3 and 4, in the furnace inlet 14 side of the furnace body 11, the billets 12 carried into the furnace from the charging roller table 23 by the transfer machine 24 are lined up one after another. The billets 12 are placed on the six movable riders 17 arranged, and then each billet 12 is heated to a predetermined temperature while passing through the furnace body 11 while being placed on the movable riders 17. .

At this time, as shown in FIG. 2, the movable rider 1
Since 7 slides on the skid rail 16 with its own lower surface as the sliding surface, the lower surface of the billet 12 does not slide directly on the skid rail 16 as in the conventional case, and the billet 12 is flawed. There is no such thing.

Then, as shown in FIGS.
When the billet 12 reaches the furnace exit 15 side of the
Are picked up and placed on the extraction roller table 26, and then carried out to the next rolling step by the extraction roller table 26.

On the other hand, the movable lidar 17 after the billet 12 is picked up is further conveyed by pushing in the new movable lidar 17 by the pusher 19, and finally passes through the furnace outlet 15 and the furnace of the return conveyor 20. It is pushed onto the exit side conveyor 30.

After that, the movable rider 17 on the furnace outlet side conveyor 30 is returned to the movable rider pushing position a again via the furnace outlet side conveyor 30, the furnace side surface conveyor 31, and the furnace inlet side conveyor 32. As a result, an automatic circulation system of the movable rider 17 is formed by the pusher 19, the skid rail 16, and the return conveyor 20, so that the movable rider 17 after use is pulled back to the furnace inlet 14 by, for example, an operator using a carrier, It is possible to eliminate the troublesome work of setting the movable rider pushing positions a one by one.

When the furnace is stopped, the supply of the billet 12 into the furnace body 11 is stopped for a while before the furnace is stopped, while the pusher 19 continues pushing the movable rider 17 The empty movable lidar 17 on which the billet 12 is not placed continues to accumulate, and when the furnace is stopped, the billet 12 can be in a state where it is not inside the furnace.
The generation of defective products due to the remaining in the furnace can be eliminated, and the heavy billet 1 that remains during the maintenance in the furnace
It is not necessary for the worker to carry out 2 and the workability of maintenance is improved.

Next, referring to FIG. 6, a heating furnace carrying device according to a second embodiment of the present invention will be described. In the heating furnace transfer device 40 of the second embodiment of the present invention, a plate-like lubricant 41, which is an example of a friction reducing member between the skid rail 16 and the movable rider 17, is provided on the lower surface of the movable rider 17. 16
By sinter-bonding the upper part, the lower surface of the movable rider 17 that is sliding on the skid rail 16 is less likely to be scratched, the life of the movable rider 17 is extended, and the load on the pusher 19 is reduced. This is to allow use of an inexpensive pusher having a relatively small output.

As the lubricant 41, a material having heat resistance such as a metal sintered material mixed with tungsten difluoride or molybdenum disulfide can be used. As the friction reducing member, for example, a roller or a ball receiving seat can be adopted in addition to the lubricant 41.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and the present invention is included even if there are design changes and the like without departing from the scope of the invention. For example, the movable lidar may have any shape and size, and the sliding portion of the movable rider in contact with the skid rail may have any shape.

Further, the return conveyor is not limited to the one having the structure of the embodiment, but may be a conveyor composed of any other component parts. In short, it suffices if the movable lidar pushed out from the furnace outlet can be conveyed to the movable lider pushing position at the furnace inlet.

Further, in the embodiments, billets are shown as the rolling material, but the present invention is not limited to this and may be, for example, bloom or slab.

[0033]

According to the heating furnace carrying device of the first aspect, when the movable lidar is pushed into the furnace by the pusher in this way,
Since the rolled material does not slide on the skid rail as in the past, but the movable rider on which the rolled material is placed slides on the skid rail, the lower surface of the rolled material is not flawed due to being conveyed in the furnace. Also, when the furnace is stopped, if empty movable lidars are sequentially fed into the furnace some time before the furnace is stopped, a state with no rolling material can be created in the furnace when the furnace is stopped. The occurrence of such defective products can be eliminated, and at the time of maintenance in the furnace, it is not necessary for the worker to carry out the heavy rolled material remaining in the furnace, and the workability of maintenance can be improved.

In particular, the heating furnace transfer device according to claim 2 is
Since a friction reducing member is interposed between the skid rail and the movable rider, when the movable rider is pushed into the furnace by the pusher, it is difficult for the lower surface of the movable rider to be scratched and the life of the movable rider can be extended. Moreover, since the load applied to the pusher is reduced, it is possible to use an inexpensive pusher having a relatively small output.

Further, in the heating furnace transfer device according to the third aspect, since the return cover of the movable lidar extruded from the furnace outlet is provided around the furnace body, a circulation system of the extruded movable lidar can be formed. This makes it possible to eliminate the labor-intensive work of, for example, the operator carrying the used movable riders to the furnace entrance by using a carrier and setting the movable riders one by one at the movable rider pushing position.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a heating furnace transfer device according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the relevant part.

FIG. 3 is an overall plan view of the same.

FIG. 4 is a perspective view showing a transportation path of a rolled material and a movable rider.

FIG. 5 is an enlarged side view of the transfer machine.

FIG. 6 is an enlarged cross-sectional view of essential parts of a heating furnace carrier according to a second embodiment of the present invention.

[Explanation of symbols]

 10 Heating Furnace Transfer Device 11 Furnace Body 12 Billet 13 Skid Pipe 14 Furnace Inlet 15 Furnace Outlet 16 Skid Rail 17 Movable Rider 18 Rod 19 Pusher 20 Return Conveyor 23 Loading Roller Table 24 Transfer Machine 24a Decelerating Motor 24b Crank Arm 24c Fork Arm 24d Swing arm 25 Transfer machine 26 Extraction roller table 27 Drive motor 28 Speed reducer 29 Crank mechanism 30 Furnace exit side conveyor 31 Furnace side conveyor 32 Furnace inlet side conveyor 33 Push-in cylinder 33a Rod 34 Push-in cylinder 34a Rod 40 Heating furnace transfer device 41 Lubricant

Claims (3)

[Claims] 1. A plurality of skid pipes which are arranged at a predetermined interval in a furnace body and which form a passageway for rolling material, and a plurality of skid pipes which are fixed to the upper portions of the skid pipes over substantially the entire length. Of skid rails, a plurality of movable riders slidable on each of the skid rails, on which the rolled material is placed, and arranged near the furnace inlet, and on the furnace inlet side of each of the skid rails. A heating furnace transfer apparatus comprising: a pusher that pushes the movable riders sequentially mounted on the end into the furnace by strokes of a rod. 2. The heating furnace transfer device according to claim 1, wherein a friction reducing member is interposed between the skid rail and the movable rider. 3. A return conveyor is provided around the furnace body for returning the movable rider extruded from the furnace outlet to a movable rider pushing position of the furnace inlet in sequence. The heating furnace transfer device described.