JPS6234613Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a steel pipe bevel coating device for applying rust preventive oil to the beveled surface of the pipe end of a steel pipe.

In general, large-diameter steel pipes manufactured in UOE mills and used for line pipes, etc., usually have a bevel developed processing surface 2 for on-site welding at both ends of the pipe, as shown in Figure 1, after completing the press forming and finishing processes. Processing is performed. It takes a long time to transport this steel pipe 1 to the line pipe installation site, so the grooved surface 2
Rust often occurs. Therefore, depending on the destination, the grooved surface 2 is coated with anti-rust oil. However, this grooved surface 2 has various shapes as shown in FIGS. 2a, b, and c. For this reason, conventionally,
This anti-corrosion oil coating work on the grooved surface 2 was performed manually with a brush. This work is light work;
This can be done in between other tasks, but since it occurs intermittently, it has the disadvantage of being a major hindrance to unmanned operation.

The present invention was proposed in order to eliminate the above-mentioned drawbacks, and it can easily adapt to various angles of the beveled surface with an appropriate film thickness, and can automatically adjust the end of the steel pipe without manual intervention. The purpose of the present invention is to provide a bevel coating device for steel pipes that applies rust preventive oil to a grooved surface.

Hereinafter, the present invention will be described based on embodiments with reference to the drawings.

As shown in the front view of Fig. 3, this embodiment includes a brush roll that applies rust preventive oil to the beveled surface of the pipe end of a steel pipe, and a brush roll that contacts the brush roll and squeezes out the rust preventive oil. a coating head having a screen roll and a first drive for rotating the brush roll and the screen roll in opposite directions;
It consists of a second driving part that holds the painting head and slides it in the horizontal direction, and a rotating part that holds the second driving part so that it can rotate freely through a rotating shaft. A rotating shaft 4 engages with a brush roll 3 that performs bevel painting. This rotating shaft 4 is driven by an air motor 8 via a worm gear 5, a worm 6, and a chain 7, and a coating head 30 is constituted by these members. FIG. 4 is a side view of this embodiment, in which a screen roll 9 is disposed on a frame 11 in contact with a brush roll 3 via a horizontally slidable bearing 10. The screen roll 9 is rotationally driven by an air motor 8 via a worm gear 12, a worm 6b, and a chain 7. In other words, the worm shaft 6a is shared with the brush roll 3. The above worm gears 5, 12, worms 6, 6b and chain 7, air motor 8
The first driving section 31 is configured by the following. The brush roll 3 rotates in the direction of the arrow 3a, and the screen roll 9 rotates in the opposite direction to the direction of the arrow 3a. The rust preventive oil is dripped from above the screen roll 9 by a dripping device (not shown), and is supplied to the brush roll 3 in a predetermined amount. The amount of rust preventive oil supplied to the brush roll 3 can be adjusted by rotating a threaded handle 12a that is threaded onto a slidable bearing 10 of the screen roll 9 to change the contact force between the brush roll 3 and the screen roll 9. I'll pull over and do it. Next, the coating head section 30 consisting of the brush roll 3 etc. is attached to the frame 1.
1. A rail 13 is arranged on the upper part of the frame 11. The rail 13 is suspended from wheels 18 fixed to the frame 17. A bearing 15 and a pivot shaft 16 are arranged on the main frame 14 . A frame 17 is fixed to this pivot shaft 16. A worm gear 22 is provided on the pivot shaft 16 disposed on the main frame 14, and a handle 25 is provided via a worm 23 and a bearing 24 that fixes the worm gear. The brush roll 3 is rotated by rotating the main frame 14 at the center. The above-mentioned main frame 14, bearing 15, pivot shaft 16, worm gear 22, worm 23, bearing 24, and handle 25 constitute the pivot section 33. Further, an air cylinder 21 is disposed on the frame 11 and the frame 17 via a pin 19 and a pin 20, respectively, and by pushing and pulling the air cylinder 21, the entire frame 11 is leveled with respect to the main frame 14 with the wheels 18 as a guide. Slide in the direction. The frame 17, pin 19, pin 20, air cylinder 21, and wheel 18 constitute the second drive section 32. As a result, the brush roll 3 comes into soft contact with the grooved surface 2 of the steel pipe 1, as shown in FIG.

Next, the operation of the embodiment will be explained.

After the steel pipe 1 is set in a predetermined position, the angle of the brush roll 3 is adjusted in advance to a predetermined bevel groove angle using the handle 25. Next, the tip of the brush roll 3 is moved and set at a distance of 60 to 80 mm from the end face of the steel pipe 1 using, for example, a cart (not shown). Next, the frame 11 is moved by the air cylinder 21 to bring the brush roll 3 into contact with the grooved surface 2. This pressing force is 5 to 10Kgf for the film thickness.
It is optimal for obtaining a thickness of 30 to 40 μm. While the steel pipe 1 is rotated by a turning roll (not shown), the brush roll 3 is rotated and painted.
The outer diameter of the brush roll 3 is optimally 150 mm to 200 mm for the peripheral speed of the turning roll 11 of 6 to 12 m/min. In order to reduce air bubbles in the rust preventive oil of the vinyl resin on the painted surface, a variable speed motor such as an air motor (other methods may be used) is used to move the brush roll 3.
The rotation speed can be easily changed. Next, steel pipe 1
Longitudinal movement (typically 10-20
mm), longitudinal and perpendicular movement (generally
20 to 30 mm), it can be dealt with by expanding and contracting the air cylinder 21.

As explained above, the present invention has the effect of reducing manpower by automatically applying anti-corrosion oil to an appropriate film thickness in accordance with the various shapes of the beveled surface of the end of a steel pipe. .

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the beveled surface of the pipe end of a steel pipe, Fig. 2 is an explanatory diagram of the shape of the beveled surface of Fig. 1, Fig. 3 is a front view of an embodiment of the present invention, and Fig. 4 is an explanatory diagram of the beveled surface of the pipe end of a steel pipe. 3 is a side view of the embodiment shown in FIG. 3, FIG. 5 is a plan view of the embodiment shown in FIG. 3, and FIG. 6 is a plan view showing the relationship between the bevel groove angle and the brush roll. DESCRIPTION OF SYMBOLS 1... Steel pipe, 2... Beveled surface, 3... Brush roll, 9... Screen roll, 30... Painting head section, 31... First drive section, 32... Second
driving section, 33...swivel section.

Claims (1)

[Scope of utility model registration request] A brush roll that applies rust preventive oil to the beveled surface of the pipe end of a steel pipe, a screen roll that contacts the brush roll and squeezes out the rust preventive oil, and a brush roll and screen roll that are moved in opposite directions to each other. a painting head section including a first driving section that rotates the painting head; a second driving section that holds the painting head and slides it in the horizontal direction; and the second driving section is rotatable via a pivot shaft. A bevel coating device for steel pipes, characterized in that it consists of a rotating section that is held in place.