JPS5812084B2 - How to drain water from the inner surface of steel pipes - Google Patents

Description

[Detailed Description of the Invention] In a steel pipe manufacturing line, the manufactured steel pipe is passed through a hydraulic testing machine, a cooling water tank, a quenching device, etc., so water or soliple oil (hereinafter simply referred to as residual water) may be present on the inner surface of the steel pipe. remains attached.

Therefore, it is necessary to drain the remaining water from the inner surface of the steel pipe.The steel pipe is then placed on the original chain conveyor again using a drainer that can be raised and lowered in the middle of the chain conveyor. In order to secure a place to do so, the drive of the chain conveyor etc. had to be temporarily stopped, which lowered the operating rate of the line and caused problems such as it was not easy to set the timing for this stop. .

The present invention relates to a method for draining a steel pipe with residual water on a chain conveyor line using an inclined draining device that can be raised and lowered without stopping the chain conveyor.

An example of implementing the method of the present invention will be explained below based on the drawings.

In FIGS. 1 to 3, 1 is a chain conveyor that is installed in a line process in which manufactured steel pipes 3 are conveyed at a constant pitch, and cross-feeds steel pipes 3 that have residual water on their inner surfaces. An inclined draining device 2 that can be raised and lowered is provided in the middle of the chain conveyor 1.

As shown in FIG. 3, this draining device 2 is constructed by placing the required number of steel pipes 3 conveyed by the chain conveyor 1 and raising the steel pipes 3 above the chain conveyor 1.
After residual water on the inner surface of the pipe is removed, the steel pipe 3 on the draining device 2 is placed on the chain conveyor 1 again by lowering it lower than the chain conveyor 1.

Thus, the steel pipes 3 having residual water on their inner surfaces, which have been conveyed at a constant pitch by the roller conveyor 4 in the previous step, are placed on the chain conveyor 1 at a constant pitch and are conveyed laterally.

As shown in FIG. 4A, the first group of steel pipes 3a.

3b, 3c have been conveyed to a position in front of the draining device 2, the chain conveyor 1 is fast forwarded to position the first group of steel pipes 3a, 3b, 3c above the draining device 2,
And the draining device 2 is raised to remove the first group of steel pipes 3a and 3b.
, 3c as a draining device 2. It is then placed on top to drain the water (see Figures 4B and C).

Next, as shown in the fourth diagram, the second group of steel pipes 3d.

When the pipes 3e and 3f have been transported to a position in front of the drainer 2, the drainer 2 is lowered and the steel pipes 3a of the first group are removed.
, 3b, 3c are placed on the chain conveyor 1, and the chain conveyor 1 is fast-forwarded, and the second group of steel pipes 3d,
3e and 3f are positioned above the draining device 2, and the draining device 2 is raised to place the second group of steel pipes 3d, 3e, and 3f on the draining device 2, whereby draining is performed (the fourth (See Figures E-G).

Note that the first group of steel pipes 3a, 3b, and 3c are transported by the chain conveyor 1, and the required number of steel pipes are simultaneously transported from the chain conveyor 1 onto the roller conveyor 6 via the skid 5 or the like.

By repeating such a series of operations, each subsequent group of steel pipes 3 is continuously drained.

The method of draining the inner surface of a steel pipe according to the present invention is performed as described above.

On the other hand, as in the conventional example described above, if the chain conveyor 1 were to continue to be fed at a constant normal speed without rapid forwarding, the draining device 2 would raise and drain the steel pipes 3a, 3b, 3c of the first group. While there, the second group of steel pipes 3d continues.
, 3e, and 3f are also conveyed successively, so there is no empty chain conveyor 1, and the steel pipe 3a has been drained.

This means that there is no place on the chain conveyor 1 where 3b and 3c should be unloaded from the drainer 2 and placed.

- Therefore, in the case of this conventional example, the first group of steel pipes 3a.

In order to secure a place on the chain conveyor 1 to place the steel pipes 3b and 3c, the drive of the chain conveyor 1 etc. is temporarily stopped, and then the second group of steel pipes 3d is placed.

It became necessary to stop the transport of 3c and 3f.

In contrast, in the present invention, only the required number of steel pipes 3a, 3b, 3c of the first group to be drained are positioned above the drainer 2 by rapidly moving the chain conveyor 1.

Therefore, even after the post-draining is completed, there is still an empty space on the chain conveyor 1 where the required number of pipes should be placed, so the steel pipes 3a, 3b,
3c can be removed from the drainer 2 and placed thereon.

As explained above, according to the method for draining water from the inner surface of steel pipes according to the present invention, water remaining on the inner surface of each group of steel pipes is removed by appropriately switching the chain conveyor from normal speed to rapid feed. As a result, the chain conveyor does not have to stop, and the operating rate of the line does not decrease, making it highly efficient.

In addition, if it is desired to take a longer time for draining the steel pipes using the drainer, the number of steel pipes required for draining each time may be increased.

Further, a series of controls such as position detection of steel pipes, rapid forwarding of chain conveyors, and lifting and lowering of draining devices uses electric circuits using limit switches, solenoid valves, and the like.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a draining device to which the method of the present invention is applied;
2 is a front view of the same as the above, FIG. 3 is a sectional view taken along the line AA in FIG. 1, and FIG. 4 is an explanatory view of the method of the present invention. 1...Chain conveyor, 2...Drainer, 3...Steel pipe, 4...Roller conveyor, 5...Skid, 6... ...Roller conveyor.

Claims (1)

[Claims] 1. When draining the inner surface of the steel pipe using a tiltable drainer installed in the middle of a chain conveyor that transports the steel pipe with treated water remaining on the inner surface, the steel pipe is sent along the chain conveyor and When the first group of steel pipes has been conveyed to a position in front of the inclined draining device, the chain conveyor is fast-forwarded to position the first group of steel pipes above the draining device, and the draining device is raised to move to the first position. The steel pipes of the group are placed on a drainer, and when the steel pipes of the second group are conveyed to a position in front of the drainer, the drainer is lowered and the steel pipes of the first group are placed on the chain conveyor. , the chain conveyor is moved rapidly, the second group of steel pipes is positioned above the drainer, and the drainer is raised to place the second group of steel pipes on the drainer, and this series of operations is repeated. A method for draining the inner surface of a steel pipe.