CN2166292Y

CN2166292Y - Screw pipe fitting

Info

Publication number: CN2166292Y
Application number: CN 92240985
Authority: CN
Inventors: 张印国; 安永和
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-20
Filing date: 1992-11-20
Publication date: 1994-05-25
Anticipated expiration: 2002-11-20

Abstract

The utility model relates to a screw pipe fitting for connecting oil, water, air and gas pipelines. The pipe fitting is designed in that a hexagonal case and the internal screw threads of a movable joint used in the existing pipelines are removed, the longitudinal dimension is extended, and then the extended part is tapped with outer screw threads. The utility model has the advantages of small radial dimension, simple structure, easy fabrication and convenient operation; when the utility model is manufactured, the raw material consumption is low, and the casting and machining cost is low. When the pipe fitting is used, the short connection does not need, and the pipe fitting can be directly connected with an elbow, a self-closing valve, etc. Therefore, pipe material and human power can be saved, the connection points are few, and the leak rate is low.

Description

Screw pipe fitting

The utility model relates to a kind of threaded fitting that connects oil, water, wind, steam pipe road.

At present, the bushing of using in the pipeline, union all are to connect with short circuit, elbow, joint door etc. by internal thread.The short circuit requirement is big, and the processing trouble expends tubing, and space hold is many, takes a lot of work during mounting or dismounting, requires great effort.Because interface is many, so sealing material consumption is big, the leak-down rate height.So far do not see good solution as yet.

The purpose of this utility model is to provide a kind of radial dimension little, the threaded fitting that just can connect with elbow, joint door etc. without short circuit.It can reduce the interface in the pipeline, reduces leak-down rate and manufacture cost, can reduce working strength of workers, increases work efficiency.

The purpose of this utility model is achieved in that removes the bushing of using in the present pipeline, the internal thread of union, then longitudinal size is prolonged, at prolongation (1) tapping outside thread, thereby dwindled the radial dimension of bushing and union, can directly connect with elbow, joint door etc.

The utility model prolongs longitudinal size, at prolongation (1) tapping outside thread then because only need remove the bushing of using in the present pipeline, the internal thread of union.So it is simple in structure, easy to manufacture, easy to use.During manufacturing, raw materials consumption is few, and casting and machining cost are low.During use, without short circuit, save tubing and manpower, interface is few, and leak-down rate is low.

Description of drawings: Fig. 1 is bushing, and (1) is the longitudinal size prolongation.Fig. 2 is union, and (1) is the longitudinal size prolongation.Fig. 3 is the schematic representation that uses threaded fitting in the heater pipe road, and (1) is the longitudinal size prolongation, and (2) are the joint doors, and (3) are unions, and (4) are elbows, and (5) are bushings, and (6) are radiators.Saved the short circuit between (1) and (2), (2) and (3) and (3) and (4).

This threaded fitting forms through machining with solid material.

Claims

1, a kind of threaded fitting that connects oil, water, wind, steam pipe road is characterized in that: remove the bushing of using in the present pipeline, the internal thread of union, then longitudinal size is prolonged, at prolongation (1) tapping outside thread.