JPH0627206Y2 - Opening and closing trough - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of an opening / closing trough in the rolling of bar steel such as wire rods.

(Prior Art) Usually, in a small-diameter rolling mill for wire rods, a high-speed rolling mill called a block mill and subsequently a water cooling zone are arranged. In this block mill, rolling is performed at a linear velocity of about 100 m / s, but due to the small diameter and high linear velocity, sometimes a phenomenon such as rattling, that is, a misroll occurs at the inlet of the water cooling zone.

Therefore, when misroll occurs, an opening / closing trough that is opened / closed by the force of steel is usually provided immediately after the block mill so that the misroll steel is not left in the block mill. Is released,
It is discharged to the outside of the opening / closing trough. The opening / closing trough will be described below with reference to FIGS. 4 and 5.

FIG. 4 is a perspective view showing a state in which the wire rod (21) is passing through the inside of the opening / closing trough (22). The opening / closing trough (22) includes the opening / closing trough body (23) and the opening / closing trough upper lid (24). ) And the opening / closing trough lower lid (25) are formed in a box shape. Further, one ends of the opening / closing trough upper lid (24) and the opening / closing trough lower lid (25) in the longitudinal direction are rotatably supported on the opening / closing trough body (23) by pins (26) and (26).

The conventional opening and closing trough (22) is configured as described above, and is a high-temperature wire rod (2
1) passes through the opening / closing trough (22) at high speed while dropping the scale (27) attached to the surface of the wire (21). Further, when a misroll occurs at the inlet of the water cooling zone described above, the wire rod (21) swings in the direction of arrow A as shown in the perspective view of FIG. 5, and the opening / closing trough upper lid (which constitutes the opening / closing trough (22) ( twenty four)
Is opened in the direction of arrow B and the lower lid (25) of the opening / closing trough is opened in the direction of arrow C.

As a result, the misrolled wire (21) will open and close the trough (22).
It is possible to prevent the misrolled steel from being discharged outside the system and remaining in the block mill.

However, when the high-temperature wire rod (21) passes through the above-mentioned opening / closing trough (22), the oxide film adhered to the surface of the wire rod (21), that is, the scale (27) shakes the wire rod (21) itself, and By coming into contact with the inner surface of the opening / closing trough (22), it drops violently and accumulates on the inner surface of the opening / closing trough (22). As a result, the opening and closing trough (2
The scale (27) in 2) easily accumulates, and in order to remove the scale (27), the equipment is temporarily stopped and the inside of the opening / closing trough (22) is cleaned.

(Problems to be solved by the invention) As described above, in the conventional opening / closing trough, since scale easily accumulates on the inner surface of the opening / closing trough, the passing area of the hot steel such as the wire rod becomes small and the running resistance becomes large. There is a fear.

Therefore, abnormal rolling of steel occurs even with normal rolled steel,
There is a problem of opening the opening and closing trough. In addition, in order to clean and remove the scale inside the opening and closing trough that has fallen from the surface of hot steel such as wire rods that pass through the opening and closing trough, the equipment is periodically suspended and the opening and closing trough is opened each time. However, there is a problem that the scale inside the opening and closing trough has to be removed frequently, resulting in a decrease in the productivity of the equipment.

An object of the present invention is to provide an opening / closing trough capable of easily discharging the scale and preventing an opening malfunction of the opening / closing trough.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the opening / closing trough of the present invention is
Installed immediately after the high-speed rolling mill, the bottom plate member is configured so that the scale slides and accumulates directly below the wire rod that passes through the opening and closing trough that opens and closes on at least one side, and the scale that discharges the scale that slides down and accumulates on the bottom plate member It is configured to have a discharge port.

(Function) The scale that peels off from the surface of the hot steel material such as wire rod passing through the opening / closing trough slides down the inner surface of the opening / closing trough to the portion directly below where the hot steel material such as wire rod passes, and the bottom plate member bottom surface forming the opening / closing trough. Accumulate in.

Further, the accumulated scale does not stay on the bottom plate member bottom surface, and is easily dropped and discharged from the opening / closing trough through the scale discharge port opened in the bottom plate member.

Therefore, the open malfunction of the opening / closing trough can be prevented without the accumulation of scale inside the opening / closing trough.

Embodiment An embodiment of the present invention will be described in detail below. FIG. 1 is a sectional view showing an opening / closing trough (1) having an inner surface of a substantially circular shape. An opening / closing trough upper lid (3) is provided at one end of an opening / closing trough body (2) which is a bottom plate member constituting the opening / closing trough (1). ), An opening / closing trough lower lid (4) is rotatably supported at the other end by locking pins (5) and (5).

Further, a slit-shaped scale discharge port (6) for discharging scale is opened on the bottom surface of the opening / closing trough body (2), and a through hole (7) is further formed on the side surface of the opening / closing trough body (2). An air pipe (8) is arranged in the through hole (7).

The opening / closing trough (1) is configured as described above, and when the wire rod (9) rolled by a block mill and having a small diameter and a high wire speed passes through the inside of the opening / closing trough (1), ) The scale (10) attached to the surface comes off. This Fallen Scale (10)
Moves to the bottom of the opening / closing trough body (2) along the inner surface of the opening / closing trough (1) and is carried to the scale discharge port (6) by the normal steel runout force of the wire (9), but on the surface of the wire (9). Scale (10) deposited on the attached scale (10) and opening and closing trough (1)
In order to remove the scale positively, air can be jetted from the through hole (7) formed in the side surface of the opening / closing trough body (2) to blow off the scale (10). The scale (10) removed from the surface of the wire (9) is easily discharged from the scale discharge port (6) without accumulating on the inner surface of the opening / closing trough (1).

In addition, when misroll occurs, the wire rod (9) causes abnormal steel run-out, so as shown in Fig. 2, the opening and closing trough body.
The opening / closing trough upper lid (3) and the opening / closing trough lower lid (4) pivotally supported by the locking pins (5) and (5) on (2) are the wire rods from the inner surface.
(9) The wire rod (9) is released by pressing force and the opening / closing trough
(1) It is discharged outside. Therefore, it is possible to prevent the misrolled steel from remaining in the block mill.

Furthermore, even the conventional opening / closing trough (22) formed in a box shape as shown in FIG. 3 is installed at an angle of approximately 45 degrees, and the opening / closing trough body (23) and the opening / closing trough lower lid (25) are installed. It is possible to easily discharge the scale (10) from the scale discharge ports (6) and (6) by opening the slit-shaped scale discharge ports (6) and (6) in the vicinity of the connection part.

Although an example of the slit is shown as the shape of the scale discharge port (6) as described above, the shape is not limited to this.

(Effect of the Invention) According to the present invention, since the scale does not deposit inside the opening / closing trough and abnormal steel run-out does not occur, it is possible to prevent the opening / closing trough from opening incorrectly.

Further, the downtime of the equipment can be reduced, and the productivity is further improved.

[Brief description of drawings]

1 is a vertical sectional view showing an opening / closing trough of the present invention, FIG. 2 is a vertical sectional view showing the opening / closing trough of the present invention when opened, and FIG. 3 is a box-shaped opening / closing trough of the present invention. FIG. 4 is a perspective view showing a conventional opening / closing trough, and FIG. 5 is a perspective view showing the conventional opening / closing trough when opened. (1)… Opening and closing trough, (2)… Opening and closing trough body, (3)… Opening and closing trough upper lid, (4)… Opening and closing trough lower lid, (5)… Locking pin, (6)
… Scale outlet, (7)… through hole, (8)… air piping,
(9)… Wire material, (10)… Scale.

Claims (1)

[Scope of utility model registration request] 1. An opening / closing trough that is installed immediately after a high-speed rolling mill and has at least one side that opens and closes. The bottom plate member is configured so that the scale slides and accumulates directly below the wire rod that passes through the opening / closing trough. An opening / closing trough characterized in that a scale discharge port for discharging the scale accumulated by sliding down is provided on the bottom plate member.