JPS6347431Y2 - - Google Patents

Description

[Detailed description of the invention] A. Field of industrial application This invention relates to a butt adjustment jig for welding two pipes by butting them together at their ends.

When the pipes to be butt welded are thick and have a small diameter, the distortion of the pipes is small, so the difference in level is extremely small, and the jig of this invention can eliminate the difference in level and area all along the circumference of the butt part of the pipe. Although the root spacing and the spacing between both pipe ends can be kept constant and average, they can be butted together.
If the tube is thin and has a large diameter, the distortion in the tube diameter will be large and the cut portion of the tube will need to be corrected.

The jig according to the present invention is ideal for temporarily fixing comparatively thick small-diameter pipes with an outside diameter of 267.4 mm, which does not require straightening of the cut part, because the difference in level is extremely small. . Even in the case of thin-walled, large-diameter pipes, the distortion of the pipe diameter is relatively large, but it is possible to correct and adjust the abutting portion of the mating pipe, and this method can be applied.

However, very extreme distortion is out of the question and is not applicable.

In particular, the jig of the present invention can be used regardless of the inner wall of the pipe.
A method is adopted that uses the outer wall surface of the tubes to adjust or correct the difference in level between the tubes.

B. Prior art A method similar to this one has been used in the past, but the particular inconvenience is that it takes time to attach and detach the jig because it cannot be done with one touch.
In addition to the time-consuming process of setting the route spacing, the jig was also heavy, making it difficult for one person to assemble it onto the pipe. 8 and 9 illustrate and explain the method most commonly carried out by conventional means. In one pipe 1, half-split tubular band jigs 2, 2' are attached to the pipe with bolts 3. Attachment: In the case of FIG. 8, the fixing bolt 4 is adjusted to the other tube 1' and the tubes are butted against each other. In Figure 9, adjustment bolt 4
The fixing bolt 3' is used without the need for the fixing bolt 3'.
To set the route spacing, a setting plate 5 is inserted between the butt portions of the tubes to ensure a constant spacing.
Various methods have been used, but all of them are time-consuming and inconvenient.

C. Problems to be Solved by the Invention The purpose of the jig of the present invention is to provide a pipe butt adjustment jig that can eliminate all of the above-mentioned labor, can be installed and removed with a single touch, and is also equipped with a route spacing setting device.

D. Means to solve the problem This invention consists of two horseshoe-shaped plate rings 6
are fixed parallel to each other via the spacer 28 to form a plate ring body 39, and together with a similar plate ring body 40, a jig having a perfect circular inner circumferential surface is formed to form one of the welded objects. In order to fit into the pipe 37, one ends of both plate ring bodies 39 and 40 are removably connected with a hook 25 and a pin 24.
The other end is a connecting pin 17, the eccentric cam 14 formed at one end of this connecting pin 17, and the rotation center pin 1.
A telescopic locking device is provided connected to the plate ring 6 by a plurality of plates 26 from the same side of both plate ring bodies 39, 40.
A nut 9 for a jack bolt 8 for fixing the other pipe to be welded 37' is fixed to the tip thereof, and a plate 7 for setting a route interval 38 is detachably attached to the middle of this plate 26. This is a jig for adjusting the butt of the pipe fixed to the pipe.

The jig of the present invention will be explained according to the drawings. As shown in Figs. 1 and 2, this jig consists of two horseshoe-shaped plate rings 6 facing each other and a spacer
8, the plate ring body 39 is assembled by welding, and this is combined with another plate ring body 4 having a similar structure.
0, the lock device 16, and the hook 25 to form a perfect circular shape. Lock device 16
also serves as a guide for the eccentric cam 14 and the connecting pin 17, as shown in Fig. 3.
It can be expanded. The locking means of the locking device employs an eccentric cam 14 as shown in the enlarged view of FIG. A rotation center pin 15 and a lock lever 12 are attached to the eccentric cam 14, and the lock lever 12 is locked by hooking the hook 25 shown in FIG. 4 onto the pin 24 and pulling the lock lever 12 in the direction of the arrow. 13 is a stopper when the lock lever 12 is opened. The hooks 25 are fixed to both ends of the shaft 23, and are adapted to hang on pins 24 at both ends of the shaft 36, which also serve as spacers. The shaft 23 has a hook 2.
Two spring attachment handles 29 are attached so that the spring attachment handles 5 can easily hang onto the pins 24, and the springs 22 are stretched between these and the two spring attachment pins 34, respectively. Further, a connection handle 35 for an operation wire 32 of the hook 25 is attached to the opposite side of the spring attachment handle 29 of the shaft 23, and the operation wire is connected thereto. The wire is connected to the hook lever 25 using the tube 21 as a guide. One end of the tube 21 is connected to the plate 2
0, and the other end passes through the spacer 28 and opens in front of the connecting handle 35 to form a wire guide. 30 and 33 are stoppers. The horseshoe-shaped plate ring 6 is formed as shown in FIG. 1, and the adjustment devices are arranged at 90 degree intervals in the entire device.

The adjusting device includes a jack bolt unit that is responsible for centering and straightening the tubes, and a unit that sets the butt interval between the tubes. The nut 9 of the jack bolt 8 is the plate 2
Welded and attached to 6. The root spacing setting plate 7 is welded and attached to a threaded rod 27, which is set in a horizontal holding groove machined in the guide tube 10 of the setting plate 7 and held down by a nut 11. The guide tube 10 also has a plate 26
Welded and installed. The thickness of the setting plate attached to the threaded rod 27 can be changed as necessary, and can be replaced by removing the nut 11.

E. Function When installing the device of the present invention, hold the lock lever 12 with your left hand and the U-shaped handle 18 with your right hand, open the hook 25 while pulling the lock lever 19 with your fingers, and open the entire device as shown in Figure 3. Attach it to the pipe, insert the hook lever 19 into the pin 24, and apply the hook 25.

Next, by pulling the lock lever 12 in the direction of the arrow as shown in FIG. 1, the attachment to the pipe 37 is completed as shown in FIG. 5.

Next, the jack bolt 8 is adjusted in advance to the outer diameter of the pipe to be butted against, and the pipe 37' is
When the setting plate 7 is butted up as shown in FIG.
The root spacing can be set at the same time by placing the jack bolts 8 in the root spacing 38. The four jack bolts 8 are lightly tightened, and the degree of misalignment between the pipes 37 and 37' is inspected along the entire circumference of the weld groove. The installation is then completed by adjusting each of the four jack bolts 8.

Next, for removal, lightly loosen the four jack bolts 8, then use your left hand to tilt the lock lever 12 in the opposite direction to the arrow in Figure 1, and use your right hand to pull the U-shaped handle 18. , and pull the hook lever 19 with your fingers to open and remove the hook 25.

F. Example The first example of the present invention has been described above, but
In the case of thin-walled pipes, unless the pipe is particularly distorted, it is sufficient to tighten the jack bolt 8 lightly, but if it is necessary to tighten it particularly strongly, use the second bolt.
As an example, as shown in FIG. Since only the jack bolt 8 rotates, strong tightening can be achieved without damaging the pipe surface.

As shown in FIG. 7, the spindle device 41 is stationary and only the jack bolt 8 can be rotated.

G. Effect of the invention Since the plate ring bodies 39 and 40 each have two plate rings 6 spaced apart from each other by a constant distance through the spacer 28, the inner peripheral edge thereof can be stably attached to the outer periphery of one of the two pipes to be welded. It is then fitted.

Since one ends of these two plate ring bodies 39 and 40 are attached and detached using the hook 25 and the pin 24, this attachment and detachment operation is extremely easy and reliable.

The other end is connected by the connecting pin 17 and the eccentric cam 14, so the plate ring bodies 39, 40
They do not separate completely, and can be easily tightened to one of the pipes to be welded, and can be crimped to the outer circumference of the pipe in a perfect circle.

The installation of the other pipe to be welded is a simple structure in which the jack bolt 8 is attached via the nut 9 to the plate 26 projecting at right angles from the plate ring bodies 39 and 40, so it is inexpensive and requires only a few seconds. It is also easy to align two pipes to be welded.

If this jack bolt 8 is made to face the center of the pipe to be welded, and a spindle device 41 is rotatably attached to the tip of the jack bolt 8, the surface of the pipe to be welded can be fixed even if the jack bolt 8 is rotated and tightened relatively strongly. Cannot be damaged.

[Brief explanation of the drawing]

Figure 1 is a plan view of the tube butt adjustment jig according to this invention, Figure 2 is its front view, Figures 3 and 4.
The figure is an enlarged perspective view of the main part, Fig. 5 is a front view showing the state of use, Figs. 6 and 7 are partial vertical elevational views of the main part showing other embodiments, and Figs. 8 and 9. The figure is a front view of a conventional jig of this type. In the drawings, 1 is a tube, 2 and 2' are jigs, 3 and 4 are bolts, 5 is a setting plate, 6 is a plate ring, 7 is a setting plate, 8 is a jack bolt, 9 is a nut, 10 is a guide tube, 11 is a nut, 12 is a lock lever, 13 is a stopper, 14 is an eccentric cam,
15 is a rotation center pin, 16 is a locking device, 17 is a connecting pin, 18 is a handle, 19 is a foot lever, 2
0 is a plate, 21 is a tube, 22 is a spring, 23 is a shaft, 24 is a pin, 25 is a hook, 26 is a plate, 27 is a threaded rod, 28 is a spacer, 29 is a spring mounting handle, 30 and 33 are stoppers, 32 is the operating wire, 34 is the spring mounting handle, 35 is the connection handle, 36 is the shaft,
37 is a tube, 38 is a root spacing, 39 and 40 are plate ring bodies, 41 is a spindle device, 42 is a groove, and 43 is a threaded portion.

Claims (1)

[Claims for Utility Model Registration] 1. Two horseshoe-shaped plate rings 6 are fixed parallel to each other via a spacer 28 to form a plate ring body 39, and a plate ring body 40 similar to this is formed. In order to form a jig with a perfectly circular inner circumferential surface and fit it onto one of the pipes to be welded 37, one ends of both plate ring bodies 39 and 40 are removably connected with a hook 25 and a pin 24. The other end is the connecting pin 17 and this connecting pin 1
A telescoping locking device is provided connected by an eccentric cam 14 and a rotation center pin 15 formed at one end of the plate ring body 39,
A plurality of plates 26 are fixed at right angles to the plate ring 6 from the same side of the plate ring 6, and a nut 9 for a jack bolt 8 for fixing the other pipe to be welded 37' is fixed to the tip thereof.
This is a pipe butt adjustment jig in which a plate 7 for setting a route interval 38 is detachably fixed in the middle of the plate 26. 2. The above-mentioned utility model registration in which the center line of the jack bolt 8 is attached toward the center of the perfect circle formed by the plate ring bodies 39 and 40, and the spindle device 41 is rotatably attached to the tip of the jack bolt 8. Claim 1
Pipe butt adjustment jig as described in section.