JPH069788U - Pipe clamp device - Google Patents

Abstract

(57) [Abstract] [Purpose] Correcting misalignment in a pipe clamp device,
A mechanism for adjusting the route interval is formed so as to advance and retreat in proportion to the operation amount. [Structure] Two sets of frames 5a and 5b are attached to the outer circumferences of the pipes 1a and 1b in an annular shape.
The bar 25 is inserted through the bar insertion body 20 of the above, the tip of the bar 25 is fixed to the frame 5b, and the protruding portion 26 of the bar 25 is inserted.
The adjustment bolt 31 is screwed onto the end face 3 of the adjustment bolt 31.
In step 2, the frame 5a is pushed forward, the pulling rod 33 extending from the end face 32 is inserted into the through hole 16 of the frame 5a, and the stopper 34 is provided at the tip to pull the frame 5a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pipe clamp device used for centering and adjusting a route interval during butt welding of pipes.

[0002]

[Prior art]

 Conventionally, there is a pipe groove alignment device described in Japanese Utility Model Laid-Open No. 54-46824. As shown in FIG. 7, the pipe groove aligning device described in the above publication has an annular frame 5 attached to one pipe 1a, and a turnbuckle is inserted from this frame 5 to the other pipe 1b side. The arm 60 is extended and provided, and the holding bolt 62 is screwed to the tip of the arm 60.

In the pipe groove aligning device shown in FIG. 7, the holding bolt 62 is screwed into the pipe 1 b so that the surface of the pipe 1 b is aligned with the surface of the pipe 1 a, and the turnbuckle 61 is rotated to rotate the holding bolt 62. Is moved forward and backward in the direction of the pipe axis to adjust the root interval of the groove alignment surface of the pipe.

[0004]

[Problems to be solved by the device]

 The conventional pipe groove aligning device is convenient because it can adjust the gaps of the pipe grooves and enlarge and reduce the root intervals with a single device.

However, when the pipe 1b is pressed by the holding bolt 62 to correct the misalignment of the pipe, when the resistance of the movement of the pipe 1b is large, this device causes the arm 60 to move. Since it is formed by inserting the turnbuckle 61, the arm 60 is bent at the turnbuckle 61.

Then, when the holding bolt 62 is further screwed in and the tube 1b starts moving, the tube 1b may move too much due to the elasticity of the bent arm 60, and it takes time to correct the misalignment. is there.

Further, although it is good to pull the holding bolt 62 with the turnbuckle 61, when the arm 60 is tried to be extended with the turnbuckle, the arm 60 bends at the turnbuckle 61, and the tube is moved in the same manner as above. When it starts moving, the elasticity of the arm 60 causes the tube 1 to move too much.

The present invention has been made in view of the above-mentioned matters, and in a pipe clamp device capable of correcting misalignment of the groove of the pipe and adjusting to increase and decrease the root interval of the groove, the misalignment is corrected. It is a technical issue to form a bolt for adjusting and a mechanism for adjusting the root interval so as to be able to move forward and backward substantially in proportion to the operation amount.

[0009]

[Means for Solving the Problems]

 According to the present invention, two sets of frames 5a and 5b that are annularly attached to the outer circumference of the pipe 1 are provided, and three or more bar inserts 20 are fixed to the outer surface of one frame 5a. In addition, the bar 25 for adjusting the route interval is slidably inserted, the tip of the bar 25 is fixed to the other frame 5b, and the base end is provided with a protrusion 26 extending along the outside of the frame 5a. A threaded hole 27 is formed in the protruding portion 26 in the pipe axis direction, and an adjusting bolt 31 whose end surface 32 contacts the contact surface 15 of the frame 5a is screwed into the threaded hole 27 and extends from the end surface 32. The pulling rod 33 is inserted from the abutting surface 15 into a through hole 16 penetrating the frame 5a, a stopper 34 is provided at the tip of the pulling rod 33, and the bar 25 is pressed against the outer surfaces of the pipes 1a and 1b. Two straightening balls that can be done And a tube clamping device screwed to 39.

[0010]

[Action]

 The pipe clamping device of the present invention is such that one frame 5a shown in FIG. 1 is clamped to the outer periphery of one pipe 1a and the other frame 5b is clamped to the outer periphery of the other pipe 1b as shown in FIG. Attach in a ring.

Then, when the adjusting bolt 31 screwed into the protruding portion 26 of the bar 25 is screwed in, the end surface 32 of the adjusting bolt 31 pushes the contact surface 15 of the frame 5a, and the frame 5a moves toward the other frame 5b. Moving. Then, one of the tubes 1a also moves, and the root distance, which is the groove distance between the tubes 1a and 1b, is also reduced.

When the adjusting bolt 31 is rotated in a direction to escape, the adjusting bolt 31 retracts, and the stopper 34 provided at the tip of the pulling rod 33 contacts the inner surface of the frame 5a to project the frame 5a. Pull toward the side of section 26. Then, the one pipe 1a is separated from the other pipe 1b to increase the groove route interval.

In order to reduce the root gap of the groove of the pipe, the end surface 32 of the adjusting bolt 31 directly presses the frame 5a, and the portion where the adjusting bolt 31 projects from the projecting portion 26 can be shortened. Therefore, the adjusting bolt 31 can be formed so as not to bend.

When the straightening bolt 39 is screwed in, the pipe 1a or the pipe 1b is pushed and moved to correct the misalignment of the groove of the pipe. Further, since the correction bolt 39 is provided so as to press both the pipe 1a and the pipe 1b, it is easy to correct the misalignment of the groove of the pipe.

The bar 25, into which the straightening bolt 39 is screwed, has its base end inserted into the bar insert 20 and its tip fixed to the frame 5b, so that the bar 25 does not bend.

[0016]

【Example】

 Embodiments will be described below with reference to the drawings. 1 to 4 are views for explaining an embodiment of the present invention.

This embodiment includes two sets of frames 5a and 5b which are annularly attached to the outer circumferences of the tubes 1a and 1b. The frames 5a and 5b rotatably connect two sets of frame pieces 6 and 6 formed in a semi-circular shape with common connecting pins 7 and 7 at their lower ends.

Then, fittings 8 and 8 are fixed to the upper ends of the two sets of frame pieces 6 and 6, respectively, and one of the fittings 8 is fitted with an engaging fitting 9 which is rotated by a support pin 10. The ends of the tightening bolts 11 that are freely shaft-attached and screwed into the respective engagement fittings 9 are brought into contact with the other fittings 8 to tighten the respective frame pieces 6 and 6. Is formed.

On the outer surface of the one frame 5a, three bar inserts 20 are evenly spaced and welded and fixed so that their insertion holes are parallel to the tube axis direction. A bar 25 for adjusting the route interval is slidably inserted into the bar inserter 20, and the tip of the bar 25 is welded and fixed to the outer surface of the other frame 5b. A projecting portion 26 extending along the outside of the frame 5a is provided at the end portion.

The projecting portion 26 is provided with a screw hole 27 formed in the tube axis direction, and an adjusting bolt 31 having an end face 32 at the tip is screwed into the screw hole 27. A pulling rod 33 having a diameter smaller than that of the adjusting bolt 31 is provided so as to extend from the central portion of the end face 32 of the pulling rod 31. A stopper 34 formed by inserting a pin is attached to the tip end of the pulling rod 33. Has been.

A circular recess is provided in one frame 5 a at a position corresponding to the screw hole 27 provided in the protruding portion 26 of the bar 25, and the bottom surface of this recess is formed as the contact surface 15. Is being touched.

A through hole 16 is provided so as to penetrate the one frame 5 a from the center of the contact surface 15. Then, the end surface 32 of the adjusting bolt 31 screwed into the screw hole 27 of the protruding portion 26 of the bar 25 comes into contact with the contact surface 15 of the one frame 5a, and the pulling rod 33 comes into contact with the through hole. A stopper 34 that is inserted into the pulling rod 16 and is attached to the tip of the pulling rod 33 prevents the pulling rod 33 from coming out of the through hole 16.

As shown in FIG. 1 and FIG. 4, slide bar inserts 43 are welded and fixed to the outer surfaces of the frames 5a and 5b, respectively, in the middle of the places where the bars 25 are provided. A slide bar 44 is inserted through the slide bar inserts 43, 43 so as to be slidable in the tube axis direction. Further, a straightening bolt 39 is screwed into each of the two straightening bolt screw holes 38 provided in the slide bar 44.

As shown in FIG. 2, the pipe clamping device of the above-described embodiment applies one frame 5a to the outer periphery of one pipe 1a and the other frame 5b to the outer periphery of the other pipe 1b, Tighten the tightening bolts 11 to attach the pipe clamp device to the pipes 1a and 1b.

Then, when the adjusting bolt 31 screwed into the protruding portion 26 of the bar 25 is screwed in, the end surface 32 of the adjusting bolt 31 pushes the contact surface 15 provided in the recess of the frame 5a, and the frame 5a is removed. It moves to the other frame 5b side. Then, one of the tubes 1a also moves, and the root distance, which is the groove distance between the tubes 1a and 1b, is also reduced.

When the adjusting bolt 31 is rotated in a direction to escape, the adjusting bolt 31 retracts, and the stopper 34 provided at the tip of the pulling rod 33 contacts the inner surface of the frame 5a to project the frame 5a. Pull toward the side of section 26. Then, the one pipe 5a is separated from the other pipe 1b to increase the groove route interval.

In order to increase the root distance of the groove of the pipe, the end surface 32 of the adjusting bolt 31 is directly pressed and the protruding portion 26 of the adjusting bolt 31 can be formed to have a shorter portion. The adjusting bolt 31 can be formed so as not to bend.

Then, when the straightening bolt 39 is screwed in, the pipe 1a or the pipe 1b is pushed and moved, and the misalignment of the groove of the pipe is corrected. Further, since the correction bolt 39 is provided so as to press both the bar 25 and the slide bar 44 and both the pipe 1a and the pipe 1b, it is easy to correct the misalignment of the groove.

Since the bar 25 and the slide bar 44 screwed with the correction bolt 39 are fixed at both the base end and the tip end, the bar 25 and the slide bar 44 do not bend.

In the above embodiment, three bars 25 and three slide bars 44 are provided, but the number of bars 25 and slide bars 44 may be increased depending on the diameter of the pipe and the like.

FIG. 5 shows an auxiliary bar 53 which is attached to another embodiment. In the following, the same parts as those in the above-mentioned embodiment are designated by the same reference numerals and their description is omitted. In this embodiment, auxiliary bars 53 are welded and fixed to the insides of the frames 5a and 5b, respectively, in parallel with the slide bar 44 of the embodiment shown in FIG. Instead of the dobar 44, it is attached to the frames 5a and 5b.

The auxiliary bar 53 can be formed without causing the auxiliary bar 53 and the correction bolt 39 to largely project outward in the radial direction of the frame 5. FIG. 6 shows an extension slide bar 48 attached to another embodiment. In this embodiment, an extension slide bar 48 shown in FIG. 6 is attached instead of a part of the slide bar 44 of the embodiment shown in FIG.

In this embodiment, in addition to the skin matching between the straight pipe and the straight pipe, it is possible to match the skin between the straight pipe and the bend pipe with the correction bolt 39 and the spacer bolt 49 provided at the end of the extension slide bar 48. Is.

The stopper 34 provided at the tip of the pulling rod 33 can be formed by a double nut.

[0035]

[Effect of device]

 According to the present invention, the base end of the bar 25 having the tip fixed to the other frame 5b is inserted into the bar insert 20 fixed to the one frame 5a, and the bar 25 extends along the outside of the frame 5a. The protrusion 26 is provided, and the adjustment bolt 31 screwed into the protrusion 26 is formed to push the frame 5a fixed to the pipe 1a.

Therefore, according to the present invention, the protruding portion of the adjusting bolt 31 can be formed short and the end surface 32 of the adjusting bolt 31 directly presses the frame 5a, so that the adjusting bolt 31 does not bend and presses the frame 5a. You can Therefore, the adjustment bolt 31 can move forward in proportion to the rotation speed to move the pipe 1a.

Further, since the bar 25 is restrained at the tip end portion and the base end portion, it does not bend, and the correction bolt 39 screwed into the bar 25 also advances in proportion to the number of revolutions of the pipe. 1a or 1b can be moved.

Therefore, according to the present invention, it is easy to correct misalignment of the groove of the pipe and adjust the route interval.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a side view showing a partial cross section of a portion provided with a bar for adjusting a root distance according to an embodiment of the present invention.

FIG. 3 is a side view showing a partial cross-section of a main part of an embodiment of the present invention.

FIG. 4 is a side view showing a partial cross section of a portion provided with a slide bar according to an embodiment of the present invention.

FIG. 5 is a side view showing a partial cross section of a portion provided with an auxiliary bar according to another embodiment of the present invention.

FIG. 6 is a side view showing a partial cross section of a portion provided with an extension slide bar according to another embodiment of the present invention.

FIG. 7 is a side view with a partial cross section of a conventional example.

[Explanation of symbols]

 1a, 1b Pipe 5a, 5b Frame 15 Contact surface 16 Through hole 20 Bar insert 25 Bar 26 Projection 27 Screw hole 31 Adjusting bolt 32 End surface 33 Pulling bar 34 Stopper 39 Straightening bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hajime Terada 37-10 Oyamanishicho, Itabashi-ku, Tokyo (72) Inventor Masami Ishikawa 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Steel Pipe Co., Ltd. (72) Inventor Takuji Haneda 88, Ono-cho, Tsurumi-ku, Yokohama-shi, Kanagawa, Japan Steel Pipe Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. Two sets of frames 5a, 5b are attached to the outer periphery of the pipe 1 in an annular shape, and one frame 5 is provided.
Three or more bar insertion bodies 20 are fixed to the outer surface of a, a bar 25 for route interval adjustment is slidably inserted into the bar insertion body 20, and the tip of the bar 25 is fixed to the other frame 5b. In addition, the base end portion is provided with the projecting portion 26 extending along the outside of the frame 5a, and the projecting portion 26 is provided with the screw hole 27 in the pipe axis direction.
An adjusting bolt 31 that comes into contact with the contact surface 15 of a is screwed, and a pulling rod 33 that extends from the end surface 32 is provided in the through hole 1 that penetrates the frame 5a from the contact surface 15.
6. A pipe clamp device which is inserted through 6 and is provided with a stopper 34 at the tip of the pulling rod 33, and two straightening bolts 39 capable of pressing the outer surfaces of the pipes 1a and 1b are screwed into the bar 25.