JPS6111130B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a trough device installed between pipe-making machines and used for transporting raw pipes.

A raw pipe rolled by a pipe-making machine, such as a plug mill, is sent to a reeler to equalize the wall thickness, polish the surface, and eliminate internal lines. The raw tube rolled by this plug mill is carried backwards through the trough by the rotation of the rollers on the roller table.
The material is rotated and rolled in a spiral between a pair of left and right cylindrical inclined rolls and a long cylindrical plug, and the inner and outer surfaces are polished and smoothed to eliminate uneven thickness.

Conventionally, the trough device used for conveying the raw pipe in this case is generally a cylindrical trough, which is arranged in large numbers at the pass center, and has a notch in a part of its lower surface, and is rotated by this notch. A roller is placed, the roller contacts the surface of the raw tube inside the trough, and the raw tube is conveyed to the inclined roll section by the rotation of the roller. Therefore, it is necessary to replace the trough every time the size of the raw pipe changes, and the material of the liner provided on the inner surface of the trough should be appropriately selected and replaced depending on its compatibility with the raw pipe, wear resistance, etc. For this reason, the task of replacing the trough is complicated and time-consuming, resulting in a decrease in the operating rate of the pipe manufacturing equipment.

The present invention has been made in view of such prior art, and aims to provide a trough device in which the trough is divided into upper and lower halves and the height of the trough can be adjusted according to the rolling state of the raw pipe and the product size. The structure of the present invention that achieves this object is that in a trough device that transports a raw pipe installed between pipe-making machines in the direction of the central axis while rotating the raw pipe around the central axis, the trough that holds the raw pipe is divided into upper and lower halves. Each of the troughs has a V-shaped cross-sectional shape, and a removable liner is attached to the inner surface of the trough according to the diameter of the raw pipe, and the progress of the raw pipe is mounted on a stand erected on the frame. An arm is provided to be rotatable in a plane orthogonal to the direction, and an upper trough is attached to the tip of the arm, and the rotation angle of this arm is fixed at an arbitrary position to adjust the height of the upper trough. It is characterized in that the lower trough is provided on the frame so as to be movable up and down.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Figures 1 to 3 show one embodiment of the trough device of the present invention, Figure 1 is a cross-sectional view, Figure 2 is a view taken in the direction of arrow A in Figure 1, and Figure 3 is a view taken in the direction of arrow X--X in the same figure. FIG.

The trough device of the present invention has a structure in which the trough, which is the main part thereof, is divided into upper and lower halves, each having a V-shaped cross section. In order to convey the raw pipe on the trough, pipe feed rollers 20 as shown in FIG. 2 are provided at several locations (three locations in the figure) along the lower trough 4.

The upper trough has a liner 3 detachably attached to the inner surface of the trough cover 11 as will be described later.
The trough cover 11 is attached to the tip of the arm 1 that forms part of the height adjustment mechanism. The base end of the arm 1 is rotatably supported by a pin 12a on a stand 12 erected on a frame 13. One end of a hydraulic cylinder 2 for rotating this arm 1 is rotatably supported by a pin 14a on a bracket 14 fixed to a frame 13, and a rod 2a is inserted into the other end of the hydraulic cylinder 2. The end of the rod 2 of the hydraulic cylinder 2 is rotatably supported by a pin 1a at the lower center of the arm 1.
By extending and contracting a, the arm 1 can rotate about the pin 12a in a plane perpendicular to the pass line, and can be rotated and opened to the state shown by the two-dot chain line in Fig. 1. . In addition, in order to fix the rotation angle of the arm 1 at an arbitrary position and adjust the height of the upper trough cover 11 attached to the arm 1, as shown in FIG. A jack 1 is provided on the frame 13 and is provided with a protrusion 8 that protrudes in the opposite direction.
A stopper 9 attached to the tip of the jack 10 is brought into contact with it, and the rotation angle of the arm 1 can be adjusted and fixed by moving the stopper 9 at the tip of the jack 10 up and down. This jack 10 is of a worm gear type and is driven by an electric motor (not shown) attached to a frame 13 to move up and down a stopper 9 fixed to the shaft of the worm wheel.

On the other hand, the lower trough 4 has a liner 5 removably attached to its inner surface, and can be moved up and down by a lifting device 6 provided on the frame 13.
It is installed opposite to the above-mentioned upper arm 1, and is configured to be able to hold the blank pipe with the upper liner 3 and the lower liner 5. Further, the lower trough 4 is not continuous but is divided into several parts, and pipe feeding rollers 20 are provided at the divided parts. The lifting device 6 in this case is composed of a V-shaped support 21, a wedge 7, a shaft 22, and a drive device 23. A V-shaped support 21 is installed in the orthogonal direction, and this V-shaped support 2
A pair of wedges 7 that can slide on the frame 13 in contact with two inclined surfaces 21a and 21b, which are the lower end surfaces of the frame 13, are provided so as to sandwich the pass line. Then, tap holes with right-handed threads and left-handed threads are formed in the pair of wedges 7, respectively, and right-handed threads and left-handed threads corresponding to the single shaft 22 that are screwed with these right-handed threads and left-handed threads are formed in the pair of wedges 7. It has been formed. Furthermore, a frame 13 is provided at one end of the shaft 22.
When the shaft 22 is rotated by the rotation of the electric motor (not shown) of the drive device 23, the pair of wedges 7 are
They move toward and away from each other in the direction of arrow a in the figure. As a result, the inclined surfaces 21a and 21b of the V-shaped support 21 that are in contact with the upper end surface of the wedge 7
The contact position changes, and the lower trough moves up and down.

Further, the attachment/detachment mechanism for fixing the liner 3 to the upper trough cover 11 and the liner 5 to the lower trough 4 is constructed as follows. The trough part is shown in an enlarged manner in FIG. 4, but to explain it using figure a which shows the case of a large-diameter raw pipe, the upper trough cover 11 has a pin 15 for fixing the liner 3a for the large-diameter raw pipe. A through hole 11a is provided for passing the liner through, and a corresponding through hole 18 is also provided in the liner 3a. A groove having a rectangular cross section is formed on the side through which the raw tube passes through the through hole 18 formed on the liner 3a side. Corresponding to this rectangular groove, the lower end of the pin 15 is also shaped to have a rectangular cross section. Therefore, by inserting the pin 15 into the trough cover 11 and the liner 3a and then rotating the pin 15 through 90 degrees, the liner 3a can be hooked as shown in FIG. 4d. In this case, since the effective length of the pin 15 is longer than the thickness of the trough cover 11 and the liner 3a, the pin 15 is fixed at the upper end by contacting the pin 15 with the trough cover 11, as shown in FIG. 4c. By driving a tapered stud 16 into the surface, the pin 15 is pulled up and the liner 3a is fixed to the trough cover 11. Then, the stopper 16 is securely fixed by screwing the retainer 17 into a tapped hole formed in the trough cover 11.

Further, the lower liner 5 is fixed by passing a bolt 19 through a hole formed in the lower trough 4 and screwing the bolt 19 into a tap hole formed in the liner 5.

In addition, as shown in Fig. 4b, which shows the case of holding a small-diameter raw pipe, the upper liner 3b has a small contact surface side to the raw pipe corresponding to the diameter of the raw pipe, and the arm 1 is attached to a large-diameter raw pipe. It is designed so that it can be rotated in the closing direction more than in the case of . Further, the liner 5 on the lower side opposite to this is the same as that used in the case of a large-diameter raw pipe. Although the fixing of the liners 3b and 5 is not shown, the same method as for the liners 3a and 5 may be used in the case of large diameter blank pipes. Further, the attachment/detachment mechanism for the liners 3, 5 is not limited to a mechanism using pins and bolts or a mechanism for fixing with bolts, but any mechanism may be used as long as the liners can be securely fixed and the liners can be easily replaced.

Next, transportation of the raw pipe using such a trough device will be explained.

First, either the large-diameter liner 3a or the small-diameter liner 3b is selected and fixed to the upper trough cover 11 according to the diameter of the raw pipe with the pin 15, the stopper 16, and the retainer 17. Next, the arm 1 is rotated around the pin 12a by the operation of the hydraulic cylinder 2, and the stopper 9 at the tip of the jack 10 is brought into contact with the protrusion 8 of the arm 1 to adjust the rotation angle of the arm 1. Adjust the height of the trough cover 11. On the other hand, the height of the lower trough 4 is also adjusted by the lifting device 6, so that the upper and lower liners 3 and 5 can hold the raw pipe. After adjusting like this,
Conveyance can be performed by driving the pipe feed roller 20.

In addition, if the diameter of the raw pipe changes slightly, the height of the upper trough is changed by adjusting the rotation angle of the arm 1, and the lower trough 4 is raised and lowered by the lifting device 6 to change it to the optimal position. Pipe manufacturing work can be continued with just that. On the other hand, if the diameter of the raw pipe changes significantly, the liner 3 attached to the upper trough cover 11 will need to be replaced, but in this case as well, it can be replaced safely and easily as follows. .
That is, the jack 10 and the lifting device 6 are operated so that the upper and lower liners 3 and 5 come into contact with each other, and in this state, the retainer 17 is loosened and the lock 16 is moved.
Pull it out, free pin 15, and rotate it 90 degrees.
The rectangular cross section of the lower end of the pin 15 is aligned with the groove and pulled out. Thereafter, when the arm 1 is rotated by the hydraulic cylinder 2, the disengaged upper liner 3 remains on the lower liner 5. Therefore, this upper liner 3 may be replaced with another liner 3, and its fixing may be performed in the completely reverse order of removal. That is, the other liner 3 is placed on the lower liner 5, and then the upper trough cover 1 is placed on top of the lower liner 5.
1 to match the liner 3, insert the pin 15 from above, rotate it 90 degrees to hook the liner 3, then drive in the kotsuta 16 and screw the retainer 17 to fix the liner 3. be done. After this,
Liner replacement is completed by adjusting the height of the upper and lower troughs.

As described above in detail with the embodiments, according to the present invention, the trough has a structure divided into upper and lower halves,
The cross-sectional shape of each is V-shaped, and the height of the trough can be adjusted, so you can use one of two types of liners for various sizes of raw pipe without having to replace the trough each time as in the past. By simply adjusting the height of the upper and lower troughs, the raw pipe can be held securely and in the optimal position, improving work efficiency. In addition, the liner can be replaced simply by operating the handle, retainer, and pin of the attachment/detachment mechanism, making installation and removal easy. By using the height adjustment device for replacement work, work safety can be ensured. Equipment downtime can be shortened and equipment operation rates can be improved.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the trough device of the present invention, in which FIG. 1 is a cross-sectional view, FIG. 2 is a view taken along arrow A in FIG. 1, and FIG. Sectional view, 4th
Figures a and b are enlarged cross-sectional views of the trough portion, where a shows the case of a large-diameter blank pipe and b shows the case of a small-diameter blank pipe, respectively.
c is a view in the direction of arrow C in figure a, and d is a view in the direction of arrow B in the same figure. In the drawing, 1 is an arm, 2 is a hydraulic cylinder, 3 is an upper liner, 4 is a lower trough, 5 is a lower liner, 6 is a lifting device, 7 is a wedge, 8 is a protrusion,
9 is a stopper, 10 is a jack, 11 is a trough cover, 12 is a stand, 13 is a frame, 14 is a bracket, 15 is a pin, 16 is a bolt, 17 is a retainer, 18 is a through hole, 19 is a bolt, 20 is a pipe 21 is a V-shaped support, 22 is a shaft, and 23 is a drive device.

Claims (1)

[Claims] 1. In a trough device that is installed between pipe-making machines and transports the raw pipe in the direction of the central axis while holding it around the central axis, the trough that holds the raw pipe is divided into upper and lower halves, each having a V-shaped cross-sectional shape. At the same time, a removable liner is attached to the inner surface of the trough according to the diameter of the raw pipe, and is rotatable in a plane perpendicular to the traveling direction of the raw pipe on a stand set up on the frame. An upper trough is attached to the tip of the arm, and an adjustment mechanism is provided to adjust the height of the upper trough by fixing the rotation angle of this arm at an arbitrary position. A trough device characterized in that a trough is provided on a frame so as to be movable up and down.