CN2189255Y

CN2189255Y - Screw-threaded joint of pipe end

Info

Publication number: CN2189255Y
Application number: CN 94204723
Authority: CN
Inventors: 谢清景
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-23
Filing date: 1994-02-23
Publication date: 1995-02-08
Anticipated expiration: 2004-02-23

Abstract

The utility model relates to a pipe thread with a pipe combined with a threaded sleeve ring, composed of a relatively thin metal pipe and a threaded sleeve ring, and the diameter at the end of the metal pipe is matched with the threaded sleeve ring. The utility model is characterized in that the point where the metal pipe slightly longer than the threaded sleeve ring is provided with a limiting ring projecting outwardly, a trumpet-shaped ring lip is formed at the edge of the metal pipe, and the threaded sleeve ring is firmly inserted and clamped between the ring lip and the limiting ring. The structure not only has low consumption of labor and materials, but also has firm connection, and the problem of the rupture of the metal pipe is solved.

Description

Screw-threaded joint of pipe end

The utility model relates to a kind of metal tube screw thread, relates in particular to the pipe end head thread that a kind of pipe combines with thread ring.

The serve as reasons metal tube of big thickness of known metal tube screw thread at the direct thread cutting of pipe end, had so not only taken and had expected but also turning is taken a lot of work, so eliminate gradually.Now establish thread ring B with thin metal tube A by the one end, the two is fixed with welding manner, so not only material-saving, but also saving of work and time, but yet have problems such as problem that not prison welding gets loose admittedly or failure welding cause that metal tube breaks.

The purpose of this utility model is to improve existing structure and a kind of new pipe and the combined structure of thread ring is provided, so that both combinations not only firmly but also had not been broken.

The purpose of this utility model is achieved in that the pipe thread that a kind of pipe combines with thread ring is made up of thin metal tube and thread ring, the diameter of metal tube end matches with thread ring, it is characterized in that slightly being longer than thread ring length place from the termination at metal tube is provided with the position-arresting ring that protrudes from inside to outside, the end limit of metal tube forms a bell mouth shape ring lip, and thread ring embedding securely is sandwiched between lip ring and position-arresting ring.

The advantage of said structure is: saving of labor, material-saving, link firmly, and metal tube breaks and waits defective products to significantly reduce, thereby improves the quality of product, and the minimizing defective goods have reduced cost.

With drawings and Examples the utility model structure is described in detail more below:

Description of drawings:

Fig. 1 is existing pipe and thread ring exploded view.

Fig. 2 for existing pipe and thread ring with the welding schematic representation that combines.

Fig. 3 is the utility model overall structure schematic representation.

As seen from Figure 3, the utility model system is by metal tube 1, thread ring 2 constitutes, thread ring 2 is enclosed within footpath outside the metal tube end, be slightly larger than the length place of thread ring 2 from the termination at metal tube, be provided with a position-arresting ring 11 that protrudes from inside to outside, the termination of metal tube 1 is a bell mouth shape ring lip 12, thread ring 2 embedding securely is sandwiched in 11 of ring lip 12 and position-arresting rings, make thread ring 2 not have the problem that comes off, owing to take the tight cold working of embedding cramping, cancelled welding processing, also eliminated thereupon, made to exist product quality problem to be properly settled at present so attain into the metal tube defective products that breaks by welding.

Claims

1, the pipe thread that combines with thread ring of a kind of pipe is made up of thin metal tube and thread ring, the diameter of metal tube end matches with thread ring, it is characterized in that slightly being longer than thread ring length place from the termination at metal tube is provided with the position-arresting ring that protrudes from inside to outside, the end limit of metal tube forms a bell mouth shape ring lip, and thread ring embedding securely is sandwiched between lip ring and position-arresting ring.