CN2133739Y

CN2133739Y - Welded pipe joint

Info

Publication number: CN2133739Y
Application number: CN 91230136
Authority: CN
Inventors: 李绍荣; 张琦
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-10-30
Filing date: 1991-10-30
Publication date: 1993-05-19
Anticipated expiration: 2001-10-30

Abstract

The utility model discloses a welded pipe joint. The connecting point of two welded pipe members (1) (2) is provided with a lining sleeve (3) of an undercut which can contain the weld bead of the inner surface of a pipe along the outer cylinder periphery of the lining sleeve (3). The welded pipe joint has no need of carrying out the cleaning operations, such as drilling, washing, blowing clear gases, baking, etc. The inner cavity of the welded pipe has no metal weld bead and metal particles. The inner part of the pipe keeps the original state before welding. The welded pipe joint is particularly suitable for pipe joints which require high cleanness and low water content of refrigerating system and super long pipe members.

Description

Welded pipe joint

The utility model relates to the improvement to welded stub connection.

Adopt melting welding or pressure welding that connection place between the pipe is directly welded at present, postwelding pipe joint inwall has weldering and heats up in a steamer.This just is difficult to satisfy the occasion of applying working condition requirement harshness, and the welded copper-aluminium tube spare that the cooling-cycle device during for example the refrigerating field nuclear reaction is tested is used requires turbidity test (impurity content) in the postwelding pipe＜100mg/m ²Water content＜50mg/m ²Must heat up in a steamer cleaning processes such as adopting drilling, cleaning, clean gas are blown, oven dry to the pipe fitting metal of postwelding for reaching this requirement, even carrying out these cleaning processes still has some metal fillingss, moisture content and is attached on the tube wall and is difficult to reach the regulation requirement, it is long that this vacuumizes difficulty, pumpdown time with influence, easily causes refrigeration system assorted stifled or ice is stifled and do not freeze.

Task of the present utility model is a kind of pipe joint of not making cleaning process on the rear tubular member inner chamber and not having weldering to heat up in a steamer that welds of design.

Technical solution of the present utility model is:

Do not make cleaning process on the rear tubular member inner chamber and do not have the pipe joint that heats up in a steamer of weldering in order to design a kind of the welding, therefore be equipped with one in by welded tube spare (1), (2) connection place along the lining (3) that has to hold the clearance groov that the inner surface of tube weldering heats up in a steamer on lining (3) the exterior circular column circumference at two.

The utility model has the advantages that this welded stub connection inner chamber not weldering heat up in a steamer and metal particle, need not to carry out cleaning processes such as drilling, cleaning, clean gas are blown, oven dry, keep inner reset condition before the pipe weldering.This welded stub connection is specially adapted to refrigerating field, be particularly useful for the overlength pipe fitting not the easy-clear metal heat up in a steamer, the pipe fitting of metal particle and steam.

Accompanying drawing be a kind of two by welded tube spare connection place be equipped with the lining inner chamber not weldering heat up in a steamer the pipe joint sectional view.

Embodiment:

Elaborate in conjunction with the accompanying drawings: in by welded tube spare (1), (2) connection place, be equipped with one along there being one to hold the lining (3) that inner surface of tube welds the clearance groov that heats up in a steamer on lining (3) the exterior circular column circumference.Weld on welding machine then, until being welded into pipe joint, the weldering that is produced during welding is heated up in a steamer with metal particle and is limited in the clearance groov of lining (3), and does not have weldering to heat up in a steamer and metal particle at the pipeline inner chamber.The clearance groov of lining (3) can form in turning, can also roll forming.

Claims

1, a kind of welded stub connection is characterized in that two are equipped with one along there being one to hold the lining (3) that inner surface of tube welds the clearance groov that heats up in a steamer on lining (3) the exterior circular column circumference in welded tube spare (1), (2) connection place.