JPS58203281A - Pipe spacer - 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 spacer for separating two metal parts when welding them together.

The interpolation associated with welding is a method of holding apart the internal shoulders of a pipe and the fitting to which the pipe is welded. Since the pipe expands during welding, if the pipe and the fitting's shield come into contact during welding, cracks may occur in the fitting, that is, the welded portion. In this invention, a spring ring spacer is installed between the end of the pipe and the cylindrical member of the fitting. 1. Since this spacer body is provided with a rigidity at one location, the ends of the spacer are spaced apart from each other.

One or several protrusions are cut out in the longitudinal direction of this spacer. These projections contact the end face of the pipe and the shield of the fitting to hold the pipe and fitting in alignment on the axis.

When the pipes are welded together, the protrusions formed on the spacer bend freely between the expanding pipe and the fitting, keeping the space between the pipe and the fitting in a difficult state.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a device for separating the shields of a pipe and a fitting during welding.

An object of the present invention is to provide a spacer that can hold the pipe in place within the fitting during welding.

Another object of the present invention is to provide a device f for completely preventing scraping that occurs in pipes and fittings during welding.

An object of the MIJ of the present invention is to provide a spacer for use between a pipe and a fitting during welding, which is easy to manufacture and use.

Another object of the present invention is to provide a spacer for use on pipes to be welded, which has a tab for confirming whether the spacer has been installed.

Further objects of the invention will become clear from the following description.

Next, a first embodiment of the present invention will be described according to the m-plane. W,
As shown in Figure 1, the spacer 10 is a flat ring-shaped base 12 provided with an opening 14 to form an end 18. A protrusion 16 is formed on the main body 12. The spacer 10 is made of a material such as stainless acid welding wire, and the reeds and protrusions 16 have a tiJ@ property.
l1l)'□When inserting the pipe 20 into the fitting 24, the spacer 102 acts as a guide to the slider 26 of the fitting 24. As shown in the second figure, when the pipe 20 is inserted into the fitting 24, the end 22 of the pipe comes into contact with the spacer 10, and the spacer 10
0 and the fitting 24 is in a slightly compressed state. If the pipe 20 is fastened to the fitting 24,
Welding defects are completed.

The protrusion 16 formed on the spacer 10 has two roles. That is, by arranging the pipe 20 and the fitting 24 in a row, and selectively spacing the end 22 of the pipe 20 and the A/D 26 of the fitting 24,
0 and the fitting 24 are prepared to be in contact with f#. In this embodiment, three protrusions 16 of equal width and approximately equally spaced apart are formed on the main length 12 of the spacer 10 so that the spacer 10 faces directly to the side within the fitting 24. It is.

FIG. 3 shows the positional relationship between the spacer 10 and the pipe 20 when the pipe 20 and the foot fitting 24 are welded to form a welded portion 28. When welding, the pipe 20
Repair in the direction of the arrow as it will be heated.

This expansion of the pipe 20 causes the protrusion 16 to expand in the partial direction. Furthermore, if there is a gap between the inner armpit of the tweeting ring 24 and the spacer 10 in a pigeon house in which the spacer 10 is used as a canopy in the fitting 24, it is necessary to widen the opening of the main body 12 of the spacer 10. ,
Expands slightly; the height of each protrusion 16 is equal to the surface 17 of the body 12 of the spacer 10.
The height of the upper surface of the protrusion 16 is determined by the height of the upper surface of the protrusion 16, which is larger than the amount of expansion of the pipe 20 and fitting 24 that occurs during welding, so the protrusion 16 expands through its flexible area and is compressed. The pipe 24, the spacer 10, and the fitting 24 are completed in a state where the qJ@ characteristics are maintained.

In the four pigeons and FIG. 5, the spacer 10 is provided with a locator or tab 60. This tab 30Vi,
jf, a light film-like plastic, and other materials, and one side of the material is coated with a novel adhesive 33.

Since the -@ branch of the tab 30 is fixed to the circumference of the 100 spacers 12 (the preferred position is the protrusion 16), the tab 60II'i normally extends in the axial direction. Spacer 1
0 into fitting 24, a removable cover (not shown) is applied to the adhesive coated surface of tab 30.

When using the spacer 10 provided with the tab 30, the spacer 1 (l fitting 24, J/L/ri 26) is installed, and then the pipe 20 is inserted. It is shown in 9 letters.Tab 50!-1t&
Since the adhesive-applied surface faces the center of the fitting 24, when the pipe 20 is inserted into the fitting 24, the outer surface 21 of the pipe 20 located facing. Tab 5
Remove the cover with a T-shape applied to the adhesive applied to the fitting 24, bend the tab 60 outward one circle at the end of the fitting 24, insert the pipe 20 into the fitting 24, and insert the pipe 20 into the fitting 24. After the end 22 contacts the protrusion 16 of the spacer 1o, this tab 3o contacts the outer surface 21 of the pipe 20-.
and is fixed to the pipe 2o.

The tabs 60 on the spacer 10 that fit inside the fitting 24 are of sufficient length so that they can extend outside the fitting 24 and have a length of approximately 1 to 21 nch (2,54 nch) depending on the size of the pipe. or 5.081
11). Tab 30 is attached to end 2 of fitting 24
7, and glue it to the outer surface of the fitting 24.
You may prepare for welding.

In this case, it is necessary to apply adhesive to both sides of the tab 600.
Ruru.

After the above procedure, the pipe 20 is fitted with the fitting 2jNC.
On the other hand, it is fastened at 25 in the figure, completing the welding process.

Pipe 20? When welded to fitting 24, tab 6
0 burns out at the weld, so the weld will not be incomplete. The space 61 between the tabs 60 that remained unburned has 1 glued to the outer surface of the pipe 2o or the fitting 24, so in some cases it may be a mark that the spacer 10 is used inside the fitting 24 during welding. It can also be done. Therefore, @spacer 10 by God
Since it can be confirmed that the weld has been used, there is no need to irradiate the welded part with X-rays.

This 5#! In the embodiment, the tab 30 is made of a material such as paper or stretchable plastic, but this tab 30 can be made of the same material as the main body 12 of the spacer 10! @You can also bite. That is, as shown in the eighth drop, the extending portion 32 extends outward from one end 18 of the main body 12 of the spacer 100.
It can also be configured by

In each of the above-described embodiments 2 regarding the spacer 10, when the pipe 20 and the fitting 24 are welded, the spacer 10 is left within the fitting 24, but the passage or flow path formed by connecting the pipe 20 and the fitting 24 is Part of the spacer 10 does not protrude inside. Usually fitting 24 before welding
Since the spacer 10 expands in the radial direction within, the spacer 10 is retained. However, when moving the fitting 24 to the welding position, it is desirable to temporarily weld the spacer 10 to the fitting 24 so that the spacer 10 disposed within the supporting fitting 24 does not come off due to vibration.

The position for this temporary attachment is between the A/D 26 of the fitting 24 and the flat surface of the protrusion 16 of the spacer 10 or the vicinity thereof. Since this temporary attachment is performed by welding only at one point, when compressive force is applied between the pipe 20 and the fitting 24 by welding, the spacer 10 can be freely expanded.

In this embodiment, the spacer 10 is made of metal, but the spacer 10 is made of a material that is soluble in water or other liquids, that is, has sufficient rigidity to function as a spacer, and is suitable for fittings and cups. After welding the pipe to the ring, it can also be made of a material that can be washed away by the vibration number. Even when such a 6J soluble spacer is used, it can be provided on the tab 30 shown in Section 2 of the second aspect of the present invention to mark the fact that the spacer is being used conveniently during welding. can.

This invention is not limited only to the above-mentioned examples,
Any modifications may be made within the scope of the claims.

[Brief explanation of drawings]

The first column is a perspective view of one embodiment of the spacer of the present invention, and the second column is a perspective view of an embodiment of the spacer of the present invention.
Shizuku is a diagram in which the spacer shown in Figure 1 is placed between the pipe and fitting, and the pipe and fitting are il! Side cross section II before contact, Figure 13 shows a side cross section with the first drop of spacer placed between the pipe and fitting, and Figure 4 shows another side cross section of the spacer of the present invention when welding the pipe and fitting. The perspective view of the actual example, No. 5 is a diagram with @4 spacers placed between the pipe and the fitting,
Side cross section before welding pipe and fitting, 6th
The figure is similar to FIG. 5, but for the side section after welding the pipe and fitting. This is a perspective view of an actual example. 10... Spacer 12... Wood body 14...
Split 16... Protrusion 17...
Surface 18... End part 20... Bar
Type 24...Fitting 26...
・Shiruda 30...Tap out 4
Person Gutdwin A. Lycan Attorney Person Patent Attorney Oka 1) Hidehiko ig8 ig6

Claims (1)

[Claims] fl) A spacer disposed between the southern part of the pipe and the annular cylindrical part of the fitting before welding the pipe and the fitting, the spacer extending from the ring-shaped body and the main part of the fitting. and a retractable protrusion on the main body. When the effective thickness of the Nubesa is increased and the outer diameter of the spacer is made approximately equal to the outer diameter of the pipe, the spacer is disposed at the sill of the fitting and the end of the pipe. , the end of the pipe and the shield of the fitting are in contact with the body at the protrusion, and the protrusion is sufficiently elastic that the end of the pipe or the shield of the fitting is in contact with the body at the protrusion; Since it is sufficiently spaced from the parts other than the protruding part of the Nubesa, even if the pipe expands during welding, the pipe and spacer will come into contact within a possible range, and by adding some space to the main body of the spacer, the main and the main part of the spacer is flush with the surface of the main part except for the protrusion, and the tab is ground approximately perpendicular to the plane of the main part and passes between the fitting and the pipe. and placed outside the fitting.
A spacer characterized by serving as a mark that the spacer is placed between a pipe and a fitting. (a) 2) The spacer according to the scope of the patent application, item No. 11, characterized in that the protruding portion is a protrusion formed on the main body of the spacer. (3) The spacer according to claim 1, characterized in that a second protrusion and a third protrusion are formed on the main diameter of the spacer with a gap between them. :4) Before welding the pipe and fitting, attach the cape between the end of this pipe and the annular cylinder of the fitting [! i! A spacer serving as a ring-shaped main body, the main body having a ridge on an end, and having a protrusion continuous from one end to the other. 1. Increase the effective thickness of the spacer so that the outer peak dimension of the body is equal to the outer diameter dimension of the pipe. i
When the spacer is disposed at the end of the fitting and the end of the pipe, the end of the pipe and the end of the fitting come into contact with the main body at the protrusion, and The protrusion has sufficient retractability, and the ends of the pipes or the walls of the fitting are sufficiently spaced apart from the other parts of the spacer, so even if one pipe is welded, , a special grade spacer in which the pipe and the spacer are in contact within the retractable range, and the end of the main body is sufficiently spaced to prevent the pipe from touching. The cross sections of the opposing planes are not circular,
The spacer according to claim 4, wherein the planes of the spacer are substantially on the same plane except for the protruding portion. I6) Before welding the pipe and the fitting, a spacer is provided between the end of the pipe and the annular shoulder of the fitting to form a ring-shaped body with a width and a plurality of holes provided on this body. from the protrusion,
the body has spaced apart ends, and the cross-sections of opposing planes of the body are not circular, the planes being substantially coplanar except for the protrusion, and the protrusion reduces the thickness of the spacer. Increase the external dimensions of the main body to the external diameter of the pipe! Equally, when the spacer is disposed on the cylinder of the fitting and the end of the pipe, the end of the pipe and the cylinder of the fitting come into contact with the main body at the protrusion, and the protrusion is They are provided at approximately equal intervals around the circumference of the main body, and the iris portions have sufficient retractability), and the end of the pipe or the cylindrical part of the fitting is sufficiently spaced from the part other than the protruding portion of the spacer. Because they are spaced apart from each other, even if the pipe expands during welding, the pipe and spacer will contact within the compressible range.Furthermore, since the 4i portion of the main space is sufficiently spaced apart, the pipe will expand and the spacer will A spacer characterized in that the protruding portion is compressed within a flexible range i, and the main body of the spacer extends in the same direction so that the book and the end of the main body do not come into contact with each other. (7) The spacer according to claim 6, wherein the number of protrusions is six. (8) Claim 6, characterized in that the outer diameter of the main body is made larger than the inner diameter of the fitting, so that the main body having spring properties is installed in the fitting in a compressed state. Spacer as described.