JPH0466223A - Method and device for draining steel tube - Google Patents

Abstract

PURPOSE:To localize the range polluted with the cooling water by making the steel tube to collide with accelerating the steel tube with the carrying means inclined and forcibly draining on the case of draining for the steel tube. CONSTITUTION:The draining device is composed of the roller conveyer 2 of the 1st carrying means following to the cutting machine 1, the roller conveyer 20 of the 2nd carrying means supported in freely inclining through the above end spindle 9, and following to them, the impact damping means. After cutting the welded steel tube with the machine 1, when it is carried with the 1st and the 2nd carrying means, the steel tube is accelerated and made to run straightly and to collide to the impact damping means. In such a way, the steel tube is drained and also the rebounding is prevented, so the range polluted with the cooling water can be limited.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a draining method for removing cooling water used in the manufacturing process of steel pipes, and a draining device used therein.

(Prior Art) In order to complete a steel pipe by rolling a steel plate, an electric resistance welded pipe manufacturing process using, for example, a high frequency welding method is used. This process generates extremely high temperatures during welding, so a large amount of cooling water mixed with a special emulsion-treated oil is poured into the steel pipe. This cooling water must be removed using the so-called tilting method and air blower method.

In the tilting method, the roller conveyor that conveys the steel pipes is tilted to drain water from the steel pipes. In this method, the transport production cycle is usually short, on the order of 3 to 12 seconds per standard, and the production line height is on average IM. The maximum length of the transported products is 12M, and the angle of inclination of the roller conveyor is small.
Since it is difficult to drain the steel pipes during the first half of the process, the pipes are tilted immediately before the stockyard after the entire process is completed.

In addition, in the air blowing method, after the steel pipe is cut, high-pressure air is usually blown into the steel pipe during a conveyance process in which the pipe is transported horizontally by a chain conveyor to blow away the water inside.

(Problem to be Solved by the Invention) However, in the tilting method, cooling water remains attached to the completed steel pipe, so the cooling water is scattered throughout the entire process from cutting to stacking and binding and transporting.

This cooling water mixes with the oxide film that has peeled off from the surface of the pipes and becomes sludge-like, seriously polluting the environment.

Furthermore, since the air blowing method blows out a large amount of air, it generates a uniquely loud noise, and furthermore, when used for medium-diameter or large-diameter steel pipes, the amount of air consumed is large and the draining effect cannot be expected.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a water draining device and a water draining method that can remove cooling water remaining in a steel pipe in a short period of time between short steps.

(Means for Solving the Problems) In order to achieve the above object, the method for draining steel pipes of the present invention is as follows:
After the welding process of the steel pipe is completed, the steel pipe cut to a predetermined length is transported by a transport means, and the transport means is tilted to accelerate the steel pipe so that it moves straight and collides with a shock absorbing means to drain the steel pipe. It is characterized by

Furthermore, after the steel pipe is drained by colliding with the impact buffering means, the steel pipe may be transferred to the next step while being tilted.

The steel pipe draining device of the present invention is provided with a first conveying means for the steel pipe cut into a predetermined length, a second conveying means that is tiltable in succession to the first conveying means, and a first conveying means for the steel pipe cut into a predetermined length. It is characterized by a steel pipe shock absorbing means installed at the end of the conveying means.

Further, it is also possible to employ a configuration in which a transfer means for transferring the steel pipe to the next process while keeping it inclined is connected to the side of the second transfer means.

(Function) After cutting the welded steel pipe into a predetermined length using a cutting machine, the welded steel pipe is transported by the first transport means.

During the conveyance process, the second conveyance means is tilted to apply acceleration to the steel pipe, causing it to travel straight and collide with the shock absorbing means.

The impact of the collision drains the steel pipe, and the impact buffer suppresses the rebound of the steel pipe.

The steel pipe that has been drained is sent laterally to the second conveyance means. Further, a steel pipe transfer means may be connected to the second conveyance means to completely drain the steel pipe.

Further, the subsequent steel pipe advances while being supported in the air by the support means until the processing of the preceding steel pipe is completed, and does not interfere with the work of the preceding steel pipe.

(Example) FIG. 1 is a plan view of an example of the draining device of the present invention, and FIG.
The figure is the same side view.

To roughly explain this embodiment, a roller conveyor 2, which is a first conveying means for the M pipe P, is installed following the cutting machine 1, and a second conveying means is provided via a support shaft 9 at the front end of the roller conveyor 2. A roller conveyor 20 is connected to the roller conveyor 20, and a shock damper 28, which is a shock absorbing means, is connected to the roller conveyor 20.
is installed. This configuration will be explained in detail below.

A long steel pipe P is cut into a predetermined length by a cutting machine 1. The roller conveyor 2 is driven by a drive motor (not shown).
Roller 4, which is driven by and carries the steel pipe P on top
. . and a support stand 5 that supports the rollers 4 .

At the bottom of the support stand 5, there is a drain trough 6, and the support stand 5 and the drain trough 6.
Legs 7 are provided for fixing.

The support shaft 9 is rotatably fixed to a roller conveyor 20 of the second conveying means, and the roller conveyor 20 just before the support shaft 9 is
On top is a pinch roll stand 1 which is a means of supporting the steel pipe.
0 is set. The pinch roll stand 10 is provided with a suppression roller 12 that is moved up and down by a cylinder 11.
The suppression roller 12 presses and supports the subsequent steel pipe P2.

On the other hand, the roller conveyor 2o includes a chain 3 driven by a drive motor M similarly to the roller conveyor 2, and
It consists of rollers 4..., support stand 5, drainage tub 6, etc. This drainage tub 6 is suspended from the support base 5 by a connecting plate 16.

A hole 25 is formed in an oval shape below the front end of the roller conveyor 20, a cylinder 26 is provided upright within the hole 25, and the rond of the cylinder 26 is pivotally attached to the lower front end of the roller conveyor 20.

A pair of draining plates 2 are installed at the front edge of the pit 25 to prevent water from scattering.
7 is installed upright, but the size and shape of this draining plate 27 can be arbitrarily selected. A shock damper 28 with an end stopper 29 is provided between the pair of draining plates 27.
are installed side by side. The end stopper 29 is located on the conveyance center line of the inclined roller conveyor 20, and the end stopper 29 is damped by a spring or a hydraulic cylinder built into the shock damper 28.

Reference numeral 30 in FIG. 1 is an extrusion cylinder, and the roller conveyor 2
They are provided at regular intervals on the sides of 0.

This extrusion cylinder 30 extrudes the steel pipe P conveyed by the roller conveyor 20 to the traverser 35 side.

As shown in FIGS. 1 and 3, the traverser 35 includes three walking beams 36 that send the steel pipe P in an inclined state to a chain conveyor 50 for the next process. The walking beam 36 is driven by a motor 37.

The steel pipe P is attached to the lifter 40 by the walking beam 36.
At the same time, the lifter 40 rises horizontally, and the steel pipe P is gradually lifted from the lower end while eliminating the inclination. The lifter 40 is connected to the chain conveyor 5
It is tilted approximately 15 degrees toward the 0 side (downward in Figure 3). Therefore, the steel pipe P on the lifter 40 also rises while being tilted, but the control plate 51 provided between the traverser 35 and the chain conveyor 50 prevents it from falling.

When the steel pipe P further rises and overcomes the control plate 51, the steel pipe P is placed horizontally on the chain conveyor 50 and transported to the next process.

Next, a method of draining water using the draining device of this embodiment will be explained.

The steel pipe P1 cut by the cutting machine 1 is placed on the rollers 4 of the roller conveyor 2, passes through the pinch roll stand 10, and is sent out to the roller conveyor 20.

When the rear end of the steel pipe P1 passes through the support shaft 9, the cylinder 26 is actuated to pull down and tilt the front end of the roller conveyor 20. Due to the inclination of the roller conveyor 20, the steel pipe P1 is
Roller 4...Accelerate above and go straight, shock damper 2
It collides with the end stopper 29 of 8, absorbs the repulsive force of 1, and stops. At the time of this collision, the water adhering to the steel pipe P1 is forcefully jetted out from the tip of the steel pipe P1 or falls from the surface due to the inertia force. These cooling waters are prevented from scattering in all directions by the drain plate 27 and the end stopper 29.

Further, the cooling water on the surface or inside the steel pipe P1 that falls during transportation is received and drained by the lower drainage gutter 6, so that it does not contaminate the surrounding area.

Then, the preceding steel pipe P1 is pushed out toward the traverser 35 side by the extrusion cylinder 30 and is conveyed to the next process while being inclined, but water is drained during this time as well. Thereafter, the cylinder 26 is operated to return the roller conveyor 20 to the horizontal state.

Note that the tip of the subsequent steel pipe P2 that has been conveyed on the roller conveyor 2 has not reached the support shaft 9, or even if it has reached the tip, it is pressed by the pinch roll stand 10 and supported in the air. ing. Therefore, the preceding steel pipe P1 is not sent out to the roller conveyor 20 until the draining process is completed and the steel pipe P1 is taken out by the next traverser 35 and the roller conveyor 20 returns to the horizontal state.

Further, in the embodiment, since air is not used, each roller 4 is coated with rubber, and a shock damper 28 is employed to absorb the impact, it is possible to suppress the generation of noise.

In this way, in the present invention, the cooling water removal process is carried out on the roller conveyor immediately after cutting and in the subsequent cross-feeding process 1 to 2.
Using a narrow section of M, we not only simply transport the steel pipes at an angle, but also effectively use the inertia of the steel pipes to forcibly drain water through collisions. Therefore, there is no need for large-scale equipment such as an air blowing device, and drainage can be quickly and effectively carried out with a simple mechanism, and the workplace can be kept clean without causing water to scatter over a wide area. Moreover, it becomes easy to circulate and reuse the collected cooling water.

(Effects of the Invention) In the present invention, since the cooling water removal process is performed in a small area, the contaminated area can be minimized.

In addition, it is a simple device, makes no noise, and has the advantage of being able to drain water regardless of the diameter of the steel pipe.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the embodiment of the draining device of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a side view of the transfer mechanism. 1... Cutting machine 2... Roller conveyor 3... Chain 4... Roller 5.
・・Support stand 6・Drain bucket 11.26
...Cylinder 12...Press roller 28...
shock damper

Claims (4)

[Claims] (1) After the steel pipe welding process is completed, the steel pipe cut to a predetermined length is transported by a transport means, and the transport means is tilted to accelerate the steel pipe so that it moves straight and collides with a shock absorbing means. (2) After the steel pipe welding process is completed, the steel pipe cut to a predetermined length is transported by a transport means, the transport means is tilted to accelerate the steel pipe, and the steel pipe is caused to travel straight and collide with a shock absorbing means, and then the steel pipe is A method of draining steel pipes that transfers them at an angle. (3) A first conveying means for the steel pipe cut to a predetermined length is installed, a second conveying means is configured to be tiltable in succession to the first conveying means, and the steel pipe is attached to the conveying end of the second conveying means. A steel pipe draining device equipped with shock absorbing means. (4) The steel pipe draining device according to claim 3, further comprising a transfer means connected to the side of the second transfer means for transferring the steel pipe to the next process while keeping the steel pipe tilted.