JPS6320670B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piping processing device for performing processing such as cutting on piping portions of power plant equipment and the like.

Piping joints in plant equipment such as nuclear power plants and thermal power plants are finished with a grinder after cutting such as gas cutting or sawing, and finished with a grinder after butt welding.

Therefore, it takes a long time to finish the piping butts, resulting in an uneven finish.

Since both ends of such piping are already fixed to other equipment, it is impossible to automatically process the piping by rotating it around its axis like an automatic welding machine in a factory.

In consideration of the above facts, the present invention automatically cuts, bevels, and
To obtain a small and lightweight pipe processing device capable of performing processing such as weld bead finishing, which can obtain power for turning and processing at the outer circumference of the pipe with the driving force of a single motor or the like. That is the purpose.

The piping processing device according to the present invention has a revolving frame rotatably attached to a frame fixed to the piping, and the revolving frame is guided in the radial direction of the piping and is biased by a spring toward the center of the pipe. A tool support bracket is provided, and a slide shaft rotated by a motor and movable in the axial direction is provided between the swing frame and the tool support bracket, and the slide shaft is provided with a rotation transmitting means to a rotation drive section of the swing frame. , and rotation transmission means for the tool attached to the tool support bracket.

According to the above configuration, the rotational force of the slide shaft can be used for both turning power and tool driving force. Therefore, only one driving source is required, and work can be carried out efficiently, and at the same time, the device can be made lighter and smaller.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, in this embodiment, a fixed frame 12 is assembled and fixed to the outer periphery of the pipe 10.

This fixed frame 12 has a two-part structure and is composed of semicircular arms 12A and 12B.
Naturally, this fixed frame can also have a multi-division structure of two or more divisions. These arms 12
Attachment bolts 14 are screwed into both ends of A and 12B to be integrated, and can be attached to the outer periphery of the intermediate portion of the pipe 10. Tightening bolts 16 are threaded into these arms 12A, 12B in the radial direction, and by tightening these bolts, the fixed frame 12 can be fixed concentrically to the pipe 10.

As shown in FIG. 2, one axial end of the fixed frame 12 is formed into a disk-shaped protrusion 12C, and the rotating frame 18 is arranged to revolve around the outer periphery of this protrusion 12C.

The first guide roller 20, which is pivotally supported by the rotating frame 18, is fitted into a ring-shaped guide groove 22 bored into the end face of the protrusion 12C, and the second and third guide rollers 24 and 26 are attached to the protrusion 12C. It holds both end faces. Further, a pinion 30 fixed to a pinion shaft 28 that is rotatably supported by the rotating frame 18 meshes with a ring gear carved on the outer periphery of the protrusion 12C.

As a result, the rotating frame 18 is held on the fixed frame 12, and rotates around the outer periphery of the fixed frame 12 by rotation of the pinion shaft 28.

Bevel gear 3 fixed to the end of pinion shaft 28
2 is a bevel gear 34 that is pivotally supported on the rotating frame 18;
It meshes at right angles. Although this bevel gear 34 is prevented from moving in the axial direction, a slide shaft 36 passing through the axis can move in the axial direction of the bevel gear 34.

A key (not shown) protruding from the bevel gear 34 is fitted into a key groove 38 bored in the axial direction of the slide shaft 36, so that rotational force is transmitted therebetween.

Another bevel gear 40 is coaxially supported on the swing arm 18 and coaxially with the slide shaft 36, and a key inserted into the key groove 38 of the slide shaft 36 is fixed thereto to impart rotational force to the slide shaft 36. It's getting old. A bevel gear 42 meshes with this bevel gear 40 at right angles, and this bevel gear 42 is connected to a motor 4 fixed to the rotating frame 18.
It is designed to receive the driving force of 4. Therefore, the rotational force of the slide shaft 36 rotationally driven by the motor 44 is extracted as turning power by the rotation transmission means consisting of the bevel gears 32 and 34.

The motor 44 is powered through a brush 48 that rolls on a slip ring 46 fixed to the outer periphery of the fixed frame 12 as the rotating frame 18 rotates.

A tool support bracket 50 is attached to the rotating frame 18.
are guided so as to be movable in the radial direction of the pipe 10. The slide shaft 36 is pivotally supported on this tool support bracket 50, and the slide shaft 3
6, and a bevel gear 52 is fixed to the end of the slide shaft 36. This bevel gear 52 has a bevel gear 54
are meshed at right angles, and the bevel gear 54 is fixed to a tool shaft 56 which is pivotally supported in the tool support bracket 50. Therefore, slide shaft 3
The rotational force of 6 is used as the above-mentioned turning power, and at the same time, it is also used as the rotational power of the tool shaft 56 by the rotation transmission means consisting of the bevel gears 52 and 54.

This tool shaft 56 is arranged parallel to the axis of the pipe 10, and a tool is attached to the tip. In this embodiment, a grinder cutter 58 is attached.

Also, the tool support bracket 50 and the rotating frame 1
A compression coil spring 60 is interposed between the rotation frame 18 and the tool support bracket 50 to urge the tool support bracket 50 in the centripetal direction of the piping 10 . It can be adjusted by changing the total amount.

The amount of approach of the tool shaft 56 to the pipe 10 is detected by a limit switch 64.

Next, the operation of this embodiment will be explained.

The fixed frame 12 is coaxially fixed to the pipe 10 using the mounting bolts 14 and the tightening bolts 16.

The slide shaft 3 is driven by the motor 44.
6 rotates, the pinion 30 receives this motor driving force and moves the rotating frame 18 to the fixed frame 1.
Rotate it twice.

At the same time, the slide shaft 36 rotates the tool shaft 56 via the bevel gears 52 and 54, so that the grinder cutter 58 can finish the weld bead 66 at the pipe joint. Weld bead 66 is spring 6
Since it is pressed against the outer periphery of the pipe 10 with a biasing force of 0, an appropriate processing pressure is always applied. Other tools can be attached in place of this cutter 58.

When the machining amount of the cutter 58 reaches a predetermined value, the limit switch 64 is activated to stop the rotation of the motor 44, and the work is completed when the fixed frame 12 is removed from the pipe 10.

Note that the motor 44 may be installed on the ground or the like, and the rotational force may be transmitted to the bevel gear 42 using a shaft such as a flexible wire.

Since the present invention has the above-mentioned configuration, it can be easily installed in the middle of existing piping and automatic machining can be performed.In particular, turning power and tool power are obtained from a slide shaft rotated by one drive source. So,
An extremely simple, efficient, and compact piping processing device can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is a sectional view taken along the line shown in Fig. 2.
A line sectional view, FIG. 4 is a line sectional view taken from FIG. 3. 10... Piping, 12... Fixed frame, 18...
...Swivel frame, 36...Slide shaft, 5
0... Tool support bracket, 58... Grinder cutter, 60... Compression coil spring.

Claims (1)

[Claims] 1. A rotating frame is provided that is rotatably mounted on a fixed frame to a pipe, and a tool support bracket is provided on this rotating frame to be guided and moved in the radial direction of the pipe and is biased by a spring toward the center of the pipe. A slide shaft that is rotated by a motor and movable in the axial direction is provided between the frame and the tool support bracket, and the slide shaft is provided with rotation transmission means to the rotation drive section of the swing frame;
A piping processing device comprising: means for transmitting rotation to a tool attached to the tool support bracket.