JPH03272387A - Housing for pipe coupling - Google Patents

Abstract

PURPOSE:To facilitate manufacture in simple structure by forming a housing with a separation engaging part and a clamp and joining a workpiece therewith, in a pipe coupling having an O-ring located between pipe ends positioned facing each other and clamped by means of a housing. CONSTITUTION:A pipe 2 having a flange part 1 is positioned facing a pipe 3 having a spherical seat part 5 formed by a laser welding process, an O-ring 4 is located between the flange part 1 and the spherical seat 5, and the flange part 1 and the spherical seat part 5 are fastened together from the outside by means of a housing 6 to form a pipe coupling. In the pipe coupling, the housing 6 is a press mold product divided into two half-circle parts A and B, and a joint between the half-circle parts A and B is formed with an engaging part C and a clamp part D. The engaging part C is provided with a groove workpiece 8a and the clamp part D is provided with grooves workpieces 8c and 8b. This constitution improves machining precision and performs stable and reliable operation to fasten the housing.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a housing for a pipe joint.

[Background of the invention]

Pipe fittings with clamps can be easily removed by loosening them, so they are sometimes used around pumps that require internal cleaning or flushing.

However, they are not often used as joints for membrane pipes, and even if they are, they are cast holes. The casting hole must be precisely machined by cutting or the like, which poses a problem in mass production and makes it expensive.

Based on this background, the present invention aims to easily manufacture a pipe joint by sheet metal press processing and laser welding, and has devised a housing for a pipe joint that has a simple structure and is easy to manufacture. It is something.

[Summary of the invention]

In the present invention, the end of one tube 2 having a flange 1 is faced to the end of the other tube 3 having a spherical seat 5 formed by laser welding on the outer periphery of the end, and the flange 1 and the spherical seat In a pipe joint in which an O-ring 4 is interposed between portions 5 and a housing 6 is tightened between a collar portion l and a ball seat portion 5 from the outside, the housing 6 is divided into two semicircular portions A and B. The joint part between A and B inside each hand is composed of a fitting part C and a clamp part, and the members for forming the fitting part C and the clamp part are processed into the desired shape. The present invention provides a housing for a pipe joint, characterized in that the processed pieces are welded to the inner ends of both hands.

〔Example〕

FIG. 1 shows a state in which a pipe 2 and a pipe 3 are connected using the joint of the present invention in a cross section passing through the pipe axis. A collar l with an enlarged diameter is formed at the end of one of the tubes 2, and
A spherical seat 5 is formed on the outer periphery of the end of the other tube 3 by laser welding.The spherical seat 5 of the other tube 3 is faced to the collar 1 of one tube 2, and this collar is The 0-ring 4 is interposed between the part 1 and the spherical seat 5, and the joint is completed by tightening the collar 1 and the spherical seat 5 with the housing 6 from the outside.The 0-ball seat 5 is a small diameter part I. It is a stepped ring with a large diameter part and an opening, and a commercially available pipe is cut into rings, which are then expanded and joined to the pipe 3 by laser welding.

As shown in FIGS. 2 and 3, the nozzing 6 is formed of semicircular parts A and B made of press-formed products, and these semicircular parts A and B form a fitting part C. It is joined at the clamp part. Semicircular parts A and B are easily manufactured by sheet metal press molding of the same shape.

Furthermore, the members of these joints are constructed by using workpieces produced by laser beam cutting and attaching them by laser welding. The fitting part C is constructed by laser welding a grooved work piece 8a on one semicircular part and a work piece 9 with a locking piece cut by a laser beam on the other semicircular part, and the clamp part is Laser beam cut grooved pieces 8b and 80
It is constructed by laser welding the inside of both hands. 8a
, 8b, and 8c are of the same type in the illustrated example.

Fig. 2 shows the clamp part before joining, and as seen in the figure, the grooved workpieces 8C and 8b, which have U-shaped notch grooves 10 on the front end faces, are connected to the semicircular part A and the semicircular part. A bolt 12 fixed to the end face of part B and having a locking piece 11 at the bottom is inserted into this notched groove 10 and tightened with a nut 13. This state is also shown in section D of FIG. Tightening of the clamp part P is performed with the other end of both hands locked at the fitting part C.

The mating portion C is as seen in FIG.

By attaching a grooved workpiece 8a similar to the clamp part to one semicircular part, and engaging the locking piece 14 of the workpiece 9 attached to the other semicircular part with the groove of this workpiece 8a,
Join.

Fig. 4 shows the shape and manufacturing process of the workpiece 9 with the locking piece 14. First, a workpiece having the shape shown in Fig. 4(a) is made, and then this is assembled as shown in Fig. 4(a). Press like this. That is, as shown in FIG. 4(a), a notch 15 is formed from a rectangular metal piece along the outer circumferential shape of the housing, and a locking piece 14 is formed on the side opposite to this notch 15. 1 Both sides are cut out to leave the central rod 16. And the fourth [1l (as shown in bl,
Perform a 9011 bending process on the base of the central rod I6.
At that time, it is preferable to use a laser beam to drill a laser-cut strip into the bent part.
The notch 15 is fitted and the portion shown by 18 in FIG. 2 is laser welded.

Figure 1l5 shows the shape and manufacturing process of the grooved workpieces 8a, 8b, and 8c. 15 and cut out so that a U-shaped notch groove lO is formed on the edge opposite to this notch 15, thereby forming two protruding pieces 19a and i9b. As shown in Figure (b), these protruding pieces 19a, 1
Slight bends 20a and 20b are formed at the tip of 9b. The bent portions 20a and 20b form the locking pieces 14 of the work piece 9. It functions as an anti-slip for the locking piece 11 of the bolt and the nut 13. The work piece 8a formed in this way,
8b and 8c are joined by fitting the notch 15 into the outer periphery of the end of the housing and laser welding the portion 18, as in the case of FIG. 4.

Figure 6 shows the set bolt tightened at the clamp part】2
This shows the nut 13, but the set bolt 12
is laser beam cut from a metal piece (a) into a T-shaped shape as shown in Figure (b), and a screw 12 is applied to the rond part as shown in Figure (b). It is almost the same type as the stopper piece 14. Also, the nut 13 (C1
As shown in the figure, a loosening prevention washer 21 is attached to the back side.

FIG. 7 shows the shape of the wire spring 22 used at both the joint portions of the fitting portion C and the clamp portion.

This is so that the locking piece 14 of the work piece 9 and the locking piece 11 of the bolt of the same type can be temporarily fixed elastically at either the fitting part C or the clamp part, as shown in Fig. 3. As shown, this wire spring 22 is mounted on the locking piece 11 or the locking piece 14, and then the workpiece 8a
The bent portion of the spring 22 is hooked to the spring 22 and 8c. by this.

In the fitting portion C, the fitting portion can be rotated about the joint portion as an axis like a hinge joint within the range of the elasticity of the wire spring 22, and the operation of mounting the housing can be performed stably. Also, bolt 1 at the clamp part.
2 is elastically temporarily fixed by the wire spring 22, so the bolt 13 can be tightened stably.

[Effect]

The pipe joint of the present invention having the above structure is not manufactured by precision cutting like conventional castings, but is manufactured by press working and welding, particularly laser beam welding. Therefore, the material may be a tube or plate that is easily available on the market, and the machining accuracy can be improved much more easily than a cast product. Furthermore, the operation of tightening the housing can be performed stably and reliably. Therefore, a pipe joint that is inexpensive and has good operability, which is not available in conventional pipe joints, is provided.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a state in which pipes are connected using the joint of the present invention as a cross section passing through the pipe axis, and Fig. 2 is for explaining the state in which the joint housing of the present invention is joined at its clamp portion. FIG. 3 is a front view of the joint housing of the present invention, FIG. 4(a) is a perspective view showing an intermediate shape of a workpiece with a locking piece, and FIGS. A perspective view showing,
FIG. 5(a) is a perspective view showing the intermediate shape of the grooved work piece;
Fig. 5) is a perspective view showing the final shape of the same machined piece, Fig. 6 (a) is a perspective view showing a half-finished bolt used in the clamp section, and Fig. 6 0)) is a processed product of the same bolt. FIG. 6(C) is a perspective view showing a nut used in the clamp portion, and FIG. 7 is a perspective view showing the shape of the spring wire. 1...Brim portion, 2...One tube. 3...Other tube, 4...0 ring. 5. Ball seat, 6. Housing. 8...Processed piece with groove, 9...Processed piece with locking piece 10
... U-shaped notch groove, 11. Bolt locking piece 12. Bolt, 13. Nut. 14...Locking piece of workpiece 9, 20...Bending portion.

Claims (4)

[Claims] (1) The end of one tube 2 having the flange 1 and the end of the other tube 3 having the spherical seat 5 formed by laser welding on the outer periphery of the end face each other, and the flange 1 and the spherical seat In a pipe joint in which an O-ring 4 is interposed between portions 5 and a housing 6 is tightened between the collar portion 1 and the ball seat portion 5 from the outside, the housing 6 is divided into two half-interiors A and B. The joint part of both semicircular parts A and B is composed of a fitting part C and a clamp part D, and the members for forming the fitting part C and clamp part D are formed into a desired shape. A housing for a pipe joint, characterized in that a processed piece is joined to the ends of both semicircular parts by welding. (2) The fitting part C consists of a workpiece 8a having a U-shaped cutout groove 10 and a workpiece 9 having a locking piece 14, and the locking piece 14 inserts the spring wire 22 into the cutout groove 10. The housing of the pipe joint according to claim 1, wherein the housing is interposed and temporarily fixed. (3) Clamping part D is work pieces 8b and 8 having U-shaped groove 10.
3. The pipe joint housing according to claim 1, wherein a bolt 12 with a locking piece 11 is inserted into the notched groove 10 and tightened with a nut 13. (4) The housing of the pipe joint according to claim 3, wherein the clamp portion D is tightened with a spring wire 22 interposed therebetween.