JPS6222279Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for inserting and transferring a material into a material end heating furnace for continuously heating the end of a material such as a steel pipe while being transferred.

Generally, in steel pipe manufacturing plants, when cold drawing steel pipes or taper threading is performed on the outer periphery of steel pipe ends such as steel pipes for oil wells, the ends of the steel pipes are usually subjected to mouth drawing or upsetting forging in advance. Although it is carried out,
Prior to such processing, the end of the steel pipe to be processed is heated to the required length.

Heating of the end of the steel pipe has conventionally been carried out using a heating device equipped with a heating furnace with a horizontally long opening as shown in FIGS. 1 and 2. The steel pipe is successively moved at predetermined intervals so as to be orthogonal to the axial direction thereof, and the required length of the end of the steel pipe is inserted to face it in the horizontally elongated open furnace. The steel pipe is heated while moving through the furnace, and is separated and extracted at the end of the horizontally long open furnace.

That is, to explain this in more detail,
In the heating device shown in FIG. 1, the heating furnace 1 itself has a heating opening shaped as a horizontally elongated opening with one side open to facilitate continuous heating of the end of the steel pipe A to be heated. The front surface of the steel pipe A is formed into a horizontal U-shape so that the steel pipe A can be carried into the furnace and heated. The aligning conveyor line 2 provided for feeding and the stopper 3 whose position can be adjusted freely provided on the end of this conveyor feed the tube so as to regulate the heating length of the tube end. Spacing pieces (i.e., claws) on a furnace front conveyor (not shown), such as a chain conveyor with claws, installed in parallel in front of the furnace.
The steel pipe A is fed between the furnace conveyors, the end of which is heated during transfer by the furnace front conveyor, and is dropped and released from the furnace front conveyor at the end of the horizontally long opening of the heating furnace. Extraction is carried out from the heating furnace by a vertical extraction roller conveyor line 4 provided parallel to the aligning conveyor line 2.

However, in this heating device, one side of the horizontally elongated opening of the heating furnace is open, so although it is convenient for carrying the steel pipe into the furnace, it has the disadvantage that heat radiation is large and thermal efficiency is degraded.

In addition, the heating apparatus shown in Fig. 2 has a horizontal U-shaped heating furnace with one side open in the heating apparatus shown in Fig. 1, so the front surface of the heating furnace itself is shaped like a horizontal U-shape in order to prevent heat loss. The steel pipe transfer line to this heating furnace is similar to the one in Fig. 1, and includes an aligning conveyor line 2' on the infeed side, a furnace front conveyor (not shown), and extraction rollers on the steel pipe discharge side. The conveyor line 4' is different from the one shown in FIG. The steel pipe A is directly fed into the heating furnace 1' by the conveyor line 2', and the stopper 3' on the end of the aligning conveyor 2' is positioned so that it can move forward and backward into the furnace by providing a hole in the back wall of the heating furnace. This is the point.

However, even in the heating device shown in FIG. 2 above, although the heating furnace has an upstream side wall, the entrance/exit opening of the stopper that determines the insertion length of the steel pipe is provided on the back wall of the heating furnace, and the furnace Because it is necessary to transfer the steel pipe inserted by a predetermined length in the furnace onto the conveyor in front of the furnace using a pusher (not shown), the opening height of the heating furnace has to be increased by the amount that the pusher kicks up. As a result, the opening area of the heating furnace becomes large, and when the heating furnace is an electric induction heating furnace in particular, there is a drawback that the heating efficiency is reduced similarly to the heating device shown in FIG. 1 above. Furthermore, with this heating device, the operation of the furnace conveyor is temporarily stopped when the steel pipes are transferred from the aligning conveyor line to the furnace front conveyor, so if the heating furnace is an electric induction heating furnace, uniform Another disadvantage is that it cannot be heated.

The present invention was made in order to eliminate the drawbacks of the conventional device as described above, and the height of the opening is made as low as possible, and the opening is bored in both the side walls and the back wall. To provide a device that can use a heating furnace with a horizontally elongated opening that has good heating efficiency and that does not cause heating, and that can continuously insert and transfer materials such as steel pipes into the heating furnace at predetermined intervals. It is something to do.

That is, the material insertion and transfer device of the present invention is installed in front of the opening of a horizontally elongated opening heating furnace so that the leading end is located upstream from the terminal end of the heating furnace opening, and the starting end is located upstream from the starting end of the furnace opening. A furnace front conveyor is provided with a large number of partition plates erected thereon, and the furnace front conveyor is provided with a large number of partition plates that allow the materials placed perpendicularly thereto to be transferred at a predetermined interval in a direction perpendicular to the axial direction of the conveyor. A dolly that is intermittently moved back between the conveyor starting ends in the same direction and at the same speed; an auxiliary dolly that is intermittently moved back on the dolly in a direction perpendicular to the direction of movement; and the auxiliary dolly. The gist of the invention is to include a material transfer/insertion mechanism consisting of a material holder which can be moved up and down at the top and which absorbs or holds the material on the furnace front conveyor when it rises.

Hereinafter, this will be explained in detail based on an embodiment shown in the drawings.

Reference numeral 11 in FIG. 3 is a heating furnace, and the heating furnace 11 is provided with, for example, an elliptical opening 12 in order to heat the end of the material B, such as a steel pipe.
By curving the end of the drawer side to be wide downward, heated material B can be automatically placed on a conveyor (not shown) installed perpendicularly to the end of the furnace conveyor 13, which will be described later. , so that it can be extracted. Furthermore, this heating furnace 11 has the opening 12 corresponding to the difference in height and diameter of the material B.
It is provided with a mechanism for adjusting the vertical position so that the axis of the material B can appropriately face the center in the height direction.

13 has an opening 1 on the front surface of the heating furnace 11.
2 is a furnace conveyor for transferring material B, and the furnace front conveyor 13 has its end located upstream from the opening end of the heating furnace 11 and its starting end from the furnace opening starting end. It is provided to be located on the upstream side, and a large number of partition plates 14 are erected on the upper surface at appropriate intervals, and the material B is continuously transferred at predetermined intervals by the partition plates 14. I'm starting to get it.

Reference numeral 15 denotes a material transfer/insertion mechanism disposed between the starting ends of the furnace front conveyor 13, which moves the material B on the furnace front conveyor 13 at a constant speed with the furnace front conveyor 13 to a predetermined height. A rolling roller is mounted on a pair of parallel guide rails 16 installed between the furnace front conveyors 13, 13 in parallel with the conveyors 13 and 13 so that the rollers can be lifted up and supported by the heating furnace 11 and inserted a predetermined length into the opening 12 of the heating furnace 11. held through the cylinder 1
7, the carriage 18 is intermittently moved back in the same direction at the same speed, and a pair of guide rails 19 provided on the carriage 18 at right angles to the running direction of the carriage 18 are used to intermittently move the carriage 18 back toward the heating furnace 11 side. It is composed of an auxiliary truck 21 that is moved by a cylinder 20, and a material holder 22 that is movable up and down on the auxiliary truck 21 and that sucks or holds the material B on the furnace front conveyor 13 when the auxiliary truck 21 is raised. There is.

As shown in FIG. 3, the material holder 22 is provided with a pantograph mechanism 23 on the auxiliary carriage 21 and an electromagnet plate 24 for attracting and holding the material on the upper portion of the pantograph mechanism 23, so that the material B can be held in a freely upward and downward direction. As shown in FIG. 4, a pair of cylinders 25, 25 are provided on the auxiliary carriage 21.
A material placement plate 26 is provided which is supported so as to be freely raised and lowered.
A pair of cylinders 27, 2 are provided on the upper portion of the material placement plate 26.
5. The cylinders 27, 27 may be disposed opposite each other and a clamping member 29 having an appropriate number of rollers 28 as shown in FIG. 5 may be provided at each end of the cylinders 27, 27 so that the material B is rotatably clamped and held by the advancement and retreat of the cylinders 27, 27.

Therefore, by using the present invention constructed as described above, it is possible to reliably insert the end of a material such as a steel pipe into a heating furnace for a predetermined length during its transfer and heat it through the following process. be.

That is, in order to heat this end, the aligning conveyor and a stopper provided in front of the aligning conveyor align the end so that it is located in front of the heating furnace, and the conveyor is automatically placed from the aligning conveyor to the front conveyor 13 using a kicker or the like. The heated material B is heated in the heating furnace 11.
The material B is transferred to the opening end of the heating furnace 11 and is sucked and held by the magnet plate 24 or the clamp holding member 29 on the upper part of the cart 18 which is running at the same speed below the material B so that it can be inserted by a predetermined length at the opening end of the heating furnace 11. Alternatively, it is held in a clamp and is pushed toward the heating furnace 11 by the auxiliary cart 21 equipped with the magnet plate 24 or the clamp holding member 29 and inserted into the furnace.

After inserting a predetermined length of the end of the material B, the material holder 22 equipped with the magnet plate 24 or the clamp holding member 29 descends to deposit the material B on the furnace conveyor 13, and then the material of the present invention is inserted. The insertion and transfer mechanism 15 returns immediately to enable continuous heating.

In addition, the material B after being inserted into the furnace is transferred to the furnace conveyor 1.
3 is suspended and heated evenly by the partition plate 14 of No. 3, and the aligning conveyor automatically moves in the drawing direction orthogonal to the furnace front conveyor 13 at the downward curved part of the terminal end of the opening 12 of the heating furnace 11. transferred to the process.

Therefore, compared to conventional methods, the present invention enables continuous heating without temporarily stopping the conveyor in front of the furnace for transferring steel pipes, and also automatically and easily aligns the ends of materials such as steel pipes. Since it is possible to minimize the area of the opening, the effect is enormous.

[Brief explanation of the drawing]

FIGS. 1 and 2 are perspective views showing a conventional heating furnace, FIGS. 3 and 4 are perspective views showing each embodiment of the present invention, and FIG. 5 is a front view showing the clamp holding member of the present invention. . 11 is a heating furnace, 12 is an opening, 13 is a conveyor in front of the furnace, 15 is a material transfer/insertion mechanism, 18 is a trolley, 2
1 is an auxiliary trolley, and 22 is a material holder.

Claims (1)

[Scope of utility model registration request] A heating furnace is provided on the front surface of the opening of the horizontally elongated opening heating furnace so that the leading end is located upstream from the terminal end of the heating furnace opening, and the starting end is located upstream from the starting end of the furnace opening. It is equipped with a furnace conveyor having a number of upright partition plates that allow the materials to be placed to be transferred at a predetermined interval in a direction perpendicular to the axial direction of the furnace conveyor. a trolley that is intermittently returned to the vehicle at the same speed as the vehicle; an auxiliary vehicle that is intermittently returned to the vehicle in a direction perpendicular to the direction of movement of the vehicle; An apparatus for inserting and transferring material into a material end heating furnace, comprising a material transfer and insertion mechanism comprising a material holder that sucks and holds or holds the material on the front conveyor.