KR970005209B1 - Pipes joints - Google Patents

Abstract

The pipe coupler is adapted to dispose a packing between metal pipes to be coupled and then to couple the coupled portions of the pipes by means of a clamp. The pipe coupler includes: divergent expanded pipe portions(11,11') formed on the ends of the coupled pipes(10,10'), each expanded pipe portions being expanded by a predetermined angle; the packing(20) disposed between the expanded pipe portions and comprised of an inclined surface(21) which is contacted with the inner peripheral of the expanded pipe portions(11,11') and an end protrusion(22) into which the ends of the expanded pipe portions are inserted; a reentrant portion(32) into which the packing(20) and the expanded pipe portions(11,11') are received; and the clamp(30) for coupling the pipes(10,10') to each other.

Description

Pipe fittings

1 is an exploded perspective view of a pipe fitting according to the present invention.

2 is a cross-sectional view of the present invention.

* Explanation of symbols for main parts of the drawings

10,10 ': Tube 11,11': Expansion tube

20: Packing 30: Clamp

32: groove portion 40: screw rod

50: silicone coating

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to fittings of metal tubes, and more particularly to tube fittings for placing a packing between metal tubes to be connected and then clamping the joints of the tubes.

Until now, various methods of joining metal tubes are known. For example, welding a pipe to be connected or forming a flange at the end of the pipe and then interposing the packing between the flanges and then tightening the flange with bolts, nuts, or screwing the end of the connection pipe into the socket for the pipe connection. However, a method of interposing a packing in between is being used.

However, the conventional metal pipe fitting method has a problem in that a leak occurs because the weld or the packing is easily damaged due to the high water pressure in the heating hot water pipe as well as the extreme temperature difference in the water in the pipe. As one of them, there is a problem that the manufacturing cost of the pipe fitting is increased and the pipe fitting becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a pipe fitting that is extremely simple in configuration and can be connected firmly and intimately.

Another object of the present invention is to form a material of the packing used for connecting the metal pipe to the same material as the material of the pipe so that even if the temperature of the water flowing in the pipe changes the pipe and the packing to expand or contract the same to prevent leakage To provide a pipe fitting.

The present invention for realizing the above object is composed of a trumpet-shaped expansion tube formed at each end of the tube to be connected, a packing inserted into the expansion tube of the tube, and a clamp for tightening the expansion tube and the packing from the outside. It features.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the present invention, expansion pipes 11 and 11 'are formed at ends of the pipes 10 and 10' to be connected to each other, and the packing 20 fitted to the ends of the expansion pipes 11 and 11 'is provided. Located between the expansion pipe (11, 11 '), it is composed of a clamp 30 for tightening the pipe joint while surrounding the expansion pipe (11, 11') and the packing (20).

The expansion pipe parts 11 and 11 'are expanded in a trumpet shape such that the angle α from the center line of the pipes 10 and 10' is approximately 45 degrees. Here, the angle α of the expansion pipe parts 11 and 11 'is 45 ° to increase the strength of the pipe joints and to tighten the pipe joints so as to be tightly coupled to each other and to improve the adhesion with the packing 20. Preferably, it may vary within the range of 40 ° to 60 °.

The packing 20 has an inclined surface 21 in contact with the inner circumferential surface of the expansion pipes 11 and 11 'on both sides thereof, and a stepped portion 22 is formed at the end of the inclined surface, thereby expanding the expansion pipes 11 and 11'. ) Is configured to be positioned, and the protrusion 23 is formed outside the stepped portion 22. In addition, the packing 20 is formed of a metal of the same material as the tube so that when the temperature of the water circulating in the tube is changed or expanded in the same manner as the tube, the expansion portion 11, 11 ') is coated with a material such as silicon 50 to enhance the sealing effect by maintaining a tight binding state.

The clamp 30 surrounding the pipe joint has an annular groove 32 having an inclined surface 32 on its inner circumferential surface, so that the protrusion 23 and the expansion pipe 11 of the packing 20 are formed in the groove 32. 11 ') are inserted, and protrusions 31 are formed at both ends of the cutout portion of the clamp 30, and screw holes are drilled in the protrusions, and the screw rod 40 is inserted into the screw hole 40 to clamp the clamp ( 30) is tightened. Here, a second packing (not shown) may be inserted into an empty space between the recess 33 of the clamp 30 and the outer circumferential surfaces of the expansion pipes 11 and 11 '.

Referring to the pipe joint process of the present invention configured as described above are as follows.

When the pipe 10, 10 'is to be connected, the packing 20 is inserted into one of the expansion parts 11 and 11' of the pipe, and then the expansion pipe part of the other pipe is inserted into the packing 20 and pressed. The end portions of the expansion pipes 11 and 11 'are positioned at the stepped portion 11 of the inner circumferential surface of the expansion pipes 11 and 11' and the inclined surface 21 of the packing 20 comes into contact with each other.

In this state, the clamp 30 is wrapped around the pipe joint so that the protrusions 23 and the expansion pipes 11 and 11 'of the packing 20 are positioned in the recess 32 of the clamp 30, and then the screw rod ( Tighten 40) while the inner end of the inclined surface 32 of the clamp 30 presses the expansion pipes 11 and 11 'to be mutually compressed, so that the clamp 30 is firmly fastened to the pipe joint.

As described above, the present invention has the advantage that the manufacturing cost of the pipe fitting is reduced and the sealing work is easy and the sealing effect is excellent because the structure is very simple and the tube to be connected can be tightly and firmly bound.

Claims (3)

A trumpet-shaped expansion pipe portion 11, 11 'formed at a predetermined angle at the ends of the pipes 10, 10' to be connected to each other, an inclined surface 21 in contact with the inner circumferential surface of the expansion pipe portions 11, 11 ', and the A stepped portion 22 is formed to receive the end of the expansion pipe portion and receives the packing 20 positioned between the expansion pipe portions 11 and 11 ', and the packing 20 and the expansion pipe portions 11 and 11'. The concave portion 32 is formed and the pipe fitting, characterized in that consisting of a clamp 30 is located on the outer peripheral surface of the expansion pipe (11, 11 ') and the packing 20 to fasten the pipe (10, 10') . The pipe fitting according to claim 1, wherein the packing (20) is made of the same metal as the material of the pipe (10, 10 ') to be connected and the outer surface thereof is coated with silicon. The tube fitting according to claim 1, wherein the trumpet-shaped expansion pipe (11, 11 ') is formed to be inclined at an angle of 40 to 60 degrees from the center line of the pipe.