JPS59180187A - Setter for space of root of pipe end - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for providing accurate VC for root spacing when all pipe ends are brought into bath contact. The following problems must be solved regarding welding work when connecting pipes.

(b) When welding the outer periphery of a steel pipe with a processed bath-joint bevel or a thin-walled pipe by butting the tongue ends of the 'R' with an unprocessed bath-joint bevel, VC is especially suitable for large-diameter pipes. In many cases, the shape of the cut surface of the pipe is not a perfect circle, creating a step at the butt part, making welding impossible.

(b) Since the pipes are large diameter pipes, it is difficult to butt them while measuring so that the butt spacing (root spacing) of the pipe ends is uniform over the entire circumference.

(c) In order to completely prevent oxidation of the welding part during welding, it is necessary to remove oxygen by replacing the environment of the bath contact part with an inert gas, such as alcone gas.

In (a) above, positive correction is required during welding, and (b)
Now, this is a simple route spacing setting, and setting it to 0 means reducing the amount of C and argon gas and simplifying the work.

This invention provides all three features that can be implemented simultaneously.Next, we will explain the complete drawings of the device according to this invention.
As shown in Figures 1 and 2, the device includes six pairs of linters (1), six pairs of cylinder mounting brackets (2) for fixing the cylinders, and a clamp holder to which a crank (4) is attached. (5), and as shown in the figure, two donut-shaped cylinder mounting bracket fixing plates (3
) are fixed to the bolts and nuts, respectively.As bolts and nuts are used in extremely large numbers, their reference numbers will be omitted.

The clamp (4) is attached to the clamp holder (5) by welding or bolts, and is reinforced by a reinforcing plate (6).

Clamp (4) is formed by a 60-inch piece obtained by dividing the circumference into 6 equal parts, and is screwed and attached to the cylinder (1), and hydraulic pressure is applied to the single-acting cylinder (1). It protrudes outward, and returns to its original position when the hydraulic pressure is turned off.A coil spring (71) is installed to fully support the restoring force of this cylinder.

Hydraulic pressure is supplied to the hydraulic branch (9) by a manual hydraulic pump (8).
), the pot pressure hydraulic hoses (4 metals) are passed through, and the vortex pressure hoses (B) are used to supply hydraulic pressure from the hydraulic supply ports 4 of 9 and 6 pairs of cylinders (]). Father, Clamp (4) [ has a root spacing measurement adjustment gauge @ attached to its center.

Details of the unit including the root spacing adjustment gauge @ are shown in FIGS. 3 to 9. This route 10j interval measurement adjustment unit Q go route interval! The route spacing adjustment gauge 03 can be replaced depending on the situation.

In order to fully seal the adjacent clamps (4), (4), a seal plate (1) is provided.The seal plate (14) is attached to the adjacent clamps (4J, (4)).
Either one of the ends of the V is attached with a socket as shown in Figure 2.

Its role is to seal as much as possible the argon gas supplied into the groove of the clamp (4).

This means that even if this part is completely sealed with argon gas, the argon gas will not be released into the atmosphere because the root gap is open to the atmosphere during welding in the welding hole shown in Figure 14 VC. This is because it doesn't really make any sense.

In order to make the removal of acid build-up as effective as possible during welding, I wrap a piece of vinyl tape around the entire circumference and remove it in the order in which welding is completed.

If the tape is brought too close to the metal bath, it will burn or burn, and these embers will immediately cause welding defects. To prevent this, it is necessary to remove 10+l from the welded part.
You will have to remove the tape at a distance of l1I+ or more. However, due to the nature of pressure, this leakage part was large enough to break the pressure of the internal argon gas pipe and become pressureless, and the argon gas finally flowed to the extent that it chased the hydrogen. It's almost like it's attached.

Next is the supply of argon gas. The argon gas supply pipe (converter) VC, which also serves as a supply cap, is connected to the argon gas hose shown in Fig. 1 by means of the three-way branch joint a shown in Fig. 01, clamp (4) side [1116 ke R
Supplied to Ding.

Supplied at 6 locations on the opposite side, 6 locations in total.

The argon gas supply pipe (4) not only serves the purpose of supplying argon gas, but also serves as a device noset/reset port when the device is moved in and out of the pipe.

You will have to wait at #Kaneko and adjust the installation location for the equipment. This rod is replaceable and can have a length of 5 to 10 L depending on the length of the pipe to be bathed.

The heavy wheels attached to the front and back of the device have the structure shown in Fig. 12. Loosen the unscrewed caster A (4) and adjust the adjustment screw 131). It was fine, so my father had to adjust the wheel chocks.
This is the caster)'fyE right fI in any direction
Change the C rotation to [Katsura Noh].

Therefore, the moving direction of the device can be moved back and forth in the axial direction of the class bath contact pipe (i
It can also be rotated circumferentially to the left and right.

The following describes how to use the apparatus according to the present invention.

First, as shown in Figure 1, suspend the entire device with the chain of the chain block as shown in Figure 12, and while supporting the argon gas pipe by hand, move the device inside the pipe.
Koinuru.

The casters (23) are adjusted to match the inner diameter of the pipe using the method described above, and then set so that they can move back and forth in the axial direction of the pipe.

Next, remove the chain (7), push the device to the position shown in Figure 13 ic, and confirm that the device is in the proper place.
(B) Open the 6 units shown in (C'), then fully open the 6 units shown in (f:I) (C), apply full γ pressure, and clamp (4) r on the internal wall V. 'C Check whether the root turbidity is suitable or not, and at the same time, hang the root spacing measurement adjustment gauge q3 at 6 locations on the inner circumference of the pipe into its drawer slot with a tool as shown in Fig. 8 or 9. The magnets shown in the figure (make sure to pull them all out 1, route 1...If the spacing is not uniform or too thick, turn off the hydraulic pressure completely, move the chain block #, and move the chain block 4 to either the left or right pipe.) Float it slightly and press it so that the root spacing measurement adjustment gauge is completely sandwiched between them, and then apply hydraulic pressure again to secure the device. Apply hydraulic pressure until there is no difference in level between the pipes and connect them to the bath. Check that it is possible, stop applying pressure, and maintain the pressure.Next, loosen the chain (4 [1')'i, turn on the vibrator, make sure that the route spacing is correct, and press the 15th After affixing vinyl tape [present] to the entire circumference of T L' shown in the figure, argon gas is fully supplied.

The root spacing measurement adjustment gauge C13 is shown in FIG.
If you press it with your finger, it will easily retract, so connect the board you pushed in before welding starts as described above. Vinyl tape(
(b) As shown in FIG. 15, the VCl secondary is removed. Automatic bath contact (automatically peels off if a cover metal is used.

In FIG. 15, symbol (c) is the bath welding rod, (7) is the bath welding bead, and @ is the root spacing.

Argon gas is released before and after the completed 71% flj peed. When using one roller for delivery, the route spacing can be adjusted without using a chain block. In on-site bath welding and shop welding, the length of the strip is different.Even if bath welding is completed across the entire circumference of 6 degrees, neither oil pressure nor argon gas is turned off until the temperature of the bath welding area drops to near room temperature. Once the temperature reaches room temperature, remove all hydraulic pressure and argon gas cutting equipment.

For thick walls, a multi-layered bath welding is applied, but in this case, the device can be removed once the entire circumference of the first layer is completed.

Figures 6 and 7 VC': Measure root distance aLjl [When gauge q3 is pressed, the gauge fixing groove (c) enters ball stopper p4 and inserts gauge Ii!
The foot is moved downward into the iJ foot groove vi), and the bottom of the main body falls down to the area indicated by the two-dot chain line and is secured. Bottom 1/C of clamp (4)! J. The bottom of the main body is machined with 3F Si4 gauge so that it can be absorbed into the light beam.

The stopper bottle 61) is attached to prevent the main body from slipping out.

The symbol ) indicates a set screw, @ indicates a spring, and the 64 gauge recess.

In order to confirm whether or not the continuous pipe line of the clamp (4) is replaced with argon gas, oxygen meter mounting joints are arranged at three locations on the side of the clamp (4), for example, every 120 degrees. It is also possible to check the presence or absence of oxygen.

As mentioned above, in the device according to the present invention, the fan-shaped clamps (4) of several bales are used to center the bales and supply inert gas, and also to accurately set the spacing between the ends of the pipes that come into contact with the bath. As a result, a good welding effect can be obtained.

This device has a simple structure and is extremely easy to operate.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view of the route 1L = tj interval setting device of the tube end according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a plan view of the menstrual region, and Fig. 4 is a view of the tube end. Figures 1 and 5 to 9 are reduced front views to explain its function, Figure 10 is an enlarged side view of the three-way branch joint, Figure 11 is its front view, and Figure 12 is a reduced front view of the three-way branch joint.
The figure is a vertical side view of the wheel, and FIGS. 13 to 15 are side views for explaining the operation. In the drawing, symbols (41) and (42) are tubes, (3) is a fixed plate, (
1) is a cylinder, (4) is a clamp, and a3 is a root distance measurement adjustment gauge.

Claims (1)

[Claims] 1. In order to butt the pipes together and make bath contact, a fixing plate vc
A plurality of single-acting cylinders are arranged radially, and a fan-shaped clamp with a groove that allows inert gas to pass through is attached to the tip of the movable shaft of each cylinder, and a root interval is set in the center of the clamp. This is a route spacing setting device at the pipe end, which is characterized by a foot surveying gauge that can be moved forward and backward in all radial directions. 2 Seal brakes at either end of the adjacent clamps arranged equally around the same circumference) (14)
5. The pipe end route spacing setting device according to claim 1, in which an annular pipe line is continuously formed by fixing the inert gas supply pipe a6.・Claim No. 104, characterized in that it also serves as a reset frame.
5 Self-loaded blind end route lnj interval setting device.