JPH10193179A - Tube joint part positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily conduct tack welding to plurality of positions around the place where two tubes are butted. SOLUTION: This device is provided with a main body 9 consisting of plate bodies 8, 8, which are formed with bent parts 10 encircling part of a surrounding of a butted place of two tubes 5, 6 to be joined at a position apart from the tubes 5, 6 at a prescribed interval in the axial direction of the tubes 5, 6, two support plates 11a, 11b protruding toward a place fixed between the bent parts 10 and butting the tubes 5, 6 and a pushing plate 15 to press/hold a butted place of the two tubes 5, 6 in contact with the support plates 11a, 11b, when protruding to the main body 9 by a cylinder device 13 free to extend/retract to hold the place where two tubes 5, 6 are butted by a tip end of the support plate/pushing plate 15 in fixed state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint positioning device used for temporarily welding two butted pipes.

[0002]

2. Description of the Related Art In order to weld two pipes, a vise method and a Yatco method have been generally used for positioning a pipe joint when pre-welding two butted butted pipes. I was

[0003] The conventional vise system is shown in FIG.
As shown in FIG. 6, an angle-shaped presser foot 2 is fixed to one end of a vice 1, and the front end of a screw rod 3 screwed to the other end of the vise 1 is provided with the presser foot 2. The other presser foot 4, which is paired in the facing direction, is attached, and by turning the handle 3a, the butting portion 7 of the two pipes 5, 6 is sandwiched between the presser foot 2, 4 to position the pipe joint to be temporarily welded. I was

[0004] In the conventional Yatco system, a pipe joint portion to be temporarily welded is positioned by sandwiching an abutting portion 7 between two pipes 5 and 6 at the tip of a large Yatco.

[0005]

When the pipes 5 and 6 are temporarily welded at the butt 7, the stability of the temporary welding is poor unless about 3 temporary welds are made in the circumferential direction of the butt 7. However, in the conventional vise system, the portion where the presser feet 2 and 4 cover the pipes 5 and 6 cannot temporarily weld the butting portion 7 (see FIG. 6) of the pipes 5 and 6 and the presser foot 2 5, the temporary welding of the butt 7 of the tubes 5, 6 can be normally performed from the left gap in FIG. 5, but the temporary welding from the right gap in FIG. The main body of force 1 is in the way, making it difficult to perform temporary welding.
Moreover, there was a problem that only insufficient temporary fixing could be performed.

Further, the conventional YATCO system has a problem in that the working efficiency is poor, the operator is tired, and, as with the vise system, only insufficient temporary fixing can be performed.

[0007] The present invention solves such a problem, and a plurality of pipes are provided at a plurality of positions around a point where two pipes to be joined meet.
It is an object of the present invention to provide a pipe joint portion positioning device capable of easily performing temporary fixing welding.

[0008]

According to the first aspect of the present invention, a bent portion which surrounds a part around a place where two pipes to be joined abut each other at a position away from the pipes is required in the axial direction of the pipes. A main body composed of plate bodies formed at intervals, two support plates fixed between the bent portions and projecting radially toward a place where the pipes abut, and supported by the cylinder device so as to be able to protrude and retract from the main body And a push plate that presses and holds the abutted portion of the two pipes that are in contact with the support plate. 2. The pipe joint positioning device according to claim 1, wherein a switching valve for a working fluid to be supplied to the cylinder device is provided in the main body.

According to the first aspect of the present invention, the two abutting portions of the two tubes are supported at three points by the two support plates and the push plate fixed between the bent portions of the plate body constituting the main body. There is a gap between the two support plates and the push plate
Temporary welding work can be easily performed from the space in the direction, and stable temporary welding can be performed.

According to the second aspect of the present invention, by switching the switching valve, the abutting portion of the two pipes can be easily held in a fixed state, and the holding can be easily released after the temporary welding. Therefore, the attachment / detachment operation for holding the butted portion can be performed quickly.

[0011]

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

FIG. 1 is a front view showing a state of use of an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1, which has two plate members 8, 8 spaced apart and parallel to each other. At the distal end of the main body 9 having a U-shape in a plan view, the abutting portion 7 of the pipes 5 and 6 to be joined is formed in an arc shape so as to surround the butt portion 7 at a distance from the upper portion in FIG. A bent portion 10 is formed so that the main body 9 has a J-shape when viewed from the side.

The bending portion 10 has two support plates 11a and 11b projecting radially toward the center of the bending portion 10 at an angle of about 120 °. It is fixed so as to extend between the plates 8.

The spacing between the two parallel plates 8, 8 is
The ends of the two support plates 11a and 11b provided so as to allow the welding torch to be inserted between the two plate members 8 and 8 and facing the bent portion 10 are
The intervals between the tubes 5 and 6 can be supported at a support angle of about 120 °.

A cover 12 is mounted on the base side surface of the main body 9, and a cylinder device 13 such as an air cylinder is mounted below the base of the main body 9, and is provided in the cylinder device 13. The piston rod 14, which expands and contracts integrally with the piston 14a, is directed to the intersection of the two support plates 11a and 11b on the extension.

A push plate 15 having a leading edge parallel to the leading edges of the support plates 11a and 11b is fixed to the tip of the piston rod 14. At the base of the push plate 15, a detent protrusion 16 is projected, and at the main body 9, a guide plate 17 is attached so as to be located on both sides of the detent protrusion 16, and the push plate 15 does not rotate. In a horizontal position,
It moves in the left-right direction of FIGS.

A switching valve 18 such as a four-way switching valve is attached to the base end of the main body 9 so that the switching operation of the switching valve 18 can be performed while holding the base end of the main body 9. I have. The switching valve 18 is connected to a working fluid supply pipe 19 such as an air hose for supplying a working fluid such as air for operating the cylinder device 13, a discharge pipe 20 for discharging the working fluid, and both ends of the cylinder device 13. Supply and discharge pipes 21, 22
By switching the knob 18 a of the switching valve 18, the working flow end supply pipe 19 is connected to one of the supply and discharge pipes 21 and 22, and at the same time the other is connected to the discharge pipe 20. 14 can be made to protrude or contract.

FIGS. 3 and 4 show an example of the switching valve 18. The valve body 2 has flow paths 24a and 24b bent in a 90 ° direction formed back to back inside an outer body 23. FIG.
5 is rotatably provided, and the external body 23
, Four ports 26a, 26b, 26c, 26d are formed in the cross direction so as to communicate with the flow paths 24a, 24b. 3 and 4, the working fluid supply pipe 19 is connected to the port 26a, one supply / discharge pipe 21 is connected to the port 26b, and the discharge pipe 20 is connected to the port 26c.
Is connected, and the other supply / discharge pipe 22 is connected to the port 26d.

Next, a method of using the above-described device will be described.

When performing temporary welding of pipes 5 and 6, first, FIG.
The piston rod 14 is contracted toward the cylinder device 13 as shown by the imaginary line in FIG.
1b. This reduction operation of the piston rod 14 is performed by switching the valve body 25 of the switching valve 18 to the state shown in FIG. 4, and at this time, the working fluid supply pipe 19 is connected to the other side via the port 26a, the flow path 24b, and the port 26d. The working fluid is supplied as shown by the arrow b in communication with the supply / discharge pipe 22 of the first embodiment, and the one supply / discharge pipe 21 communicates with the discharge pipe 20 via the port 26b, the flow path 24a, and the port 26c and is exhausted.

In this state, the two pipes 5 and 6 to be temporarily welded are butted together, and a support plate 11 is arranged so that the vicinity of the butted portion 7 is surrounded by the bent portions 10 of the plates 8 and 8 of the main body 9.
a and 11b so that the abutting portion 7 of the two tubes 5 and 6 to be temporarily welded is located between the two plates 8 and 8 as shown in FIG.

From the state shown in FIG. 4, the valve body 25 of the switching valve 18 is rotated by 90 ° as shown in FIG. Then, the working fluid from the working fluid supply pipe 19 is supplied to the port 26 a and the flow path 2.
4a, an arrow a on one supply / discharge pipe 21 through the port 26b.
Are supplied as shown in FIG.
The piston rod 14 protrudes leftward from the cylinder device 13 as shown by a solid line in FIG. 1 and is exhausted by communicating with the discharge pipe 20 via the flow path 24b and the port 26c. , 6. Then, with the butting portion 7 therebetween, the tubes 5 and 6 on both sides thereof are sandwiched at three points by the respective leading edges of the two support plates 11a and 11b and the push plate 15, and the tubes 5 and 6 are fixed in a butted state. become.

In this state, the lower part in FIG. 1 of the butt portion 7 of the pipes 5 and 6 is temporarily welded with a welding torch from the direction A.
Further, a welding torch is inserted between the two plates 8 and 8 from the direction B to temporarily weld the butting portion 7 of the pipes 5 and 6 upward in FIG. 1 from the direction C, and the left side in FIG. Between the two plate members 8, and two support plates 11a, 1
A welding torch is inserted between the distal ends of the pipes 1b, and the left side in FIG.

At this time, since each of the directions A, B, and C is a space, the work of temporary welding can be easily and reliably performed, and the abutting portions 7 of the pipes 5, 6 can be formed. Is temporarily welded at three places, so that strong temporary welding can be performed.

When the temporary welding is completed, the switching valve 18 is switched again to the state shown in FIG.
Is contracted toward the cylinder device 13 as shown by a virtual line,
As a result, the push plate 15 is separated from the butt portion 7 of the tubes 5 and 6, so that the main body 9 can be removed from the tubes 5 and 6.
The work of temporary welding is completed.

[0026]

According to the first aspect of the present invention, the butting portion of the two pipes is supported at three points by the two supporting plates and the pressing plate fixed between the bent portions of the plate constituting the main body. Therefore, the temporary welding operation can be easily performed from a space in three directions between the two support plates and the push plate, and there is an effect that stable temporary welding can be performed.

According to the second aspect of the present invention, the butt portion of the two pipes can be easily held in a fixed state by switching the switching valve provided on the main body, and can be easily held after the temporary welding. Can be released, so that there is an effect that the attaching / detaching operation for holding the butted portion can be quickly performed.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of an example of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view showing an example of a switching valve.

FIG. 4 is a sectional view showing an operation state of the switching valve of FIG. 3;

FIG. 5 is a front view showing a use state of an example of a conventional device.

FIG. 6 is a plan view of FIG. 5;

[Explanation of symbols]

 5 pipe 6 pipe 7 butted portion 8 plate 9 body 10 bent portion 11a support plate 11b support plate 13 cylinder device 15 push plate 18 switching valve

Claims (2)

[Claims] 1. A main body comprising a plate having a bent portion surrounding a part around a place where two pipes to be joined abut each other at a position away from the pipes and formed at a required interval in the axial direction of the pipes; Two supporting plates fixed between the parts and projecting radially toward the place where the tubes meet, and two buttings supported by the cylinder device so as to be able to protrude and retract from the main body and in contact with the supporting plate when protruding. And a push plate for pressing and holding the place. 2. The pipe joint positioning device according to claim 1, wherein a switching valve for a working fluid supplied to the cylinder device is provided in the main body.