CN202149299U

CN202149299U - Copper aluminum joint structure with aluminum reducer pipe

Info

Publication number: CN202149299U
Application number: CN201020272423U
Authority: CN
Inventors: 王岩; 杨训; 左晓津; 孙德兴; 陈军; 张晓红
Original assignee: 赵越; 万延尧
Priority date: 2010-07-24
Filing date: 2010-07-24
Publication date: 2012-02-22
Anticipated expiration: 2020-07-24

Abstract

The utility model relates to a copper aluminum joint structure with an aluminum reducer pipe. The copper aluminum joint structure comprises a thin-wall copper pipe and a thin-wall aluminum pipe, wherein the copper pipe and the aluminum pipe have different diameters; and a copper aluminum welding surface formed by machining a contracted pipe is arranged on the copper pipe. The copper aluminum joint structure is characterized in that a reducing part is machined on the aluminum pipe. Due to the structural form of the copper aluminum joint structure, the thin-wall copper pipe and the thin-wall aluminum pipe can be welded normally when the copper pipe and the aluminum pipe have different diameters, so as to ensure that the welding quality meets the technological use standard.

Description

A kind of copper-aluminium joint structure of aluminum pipe reducing

[technical field]

The utility model relates to a kind of structure that is used for dissimilar metal tubing welded joint, especially a kind of copper-aluminium joint structure of aluminum pipe reducing.

[background technique]

In recent years, because the copper valency is constantly raising up, promoted the expansion of aluminium for the application market scope of copper material technological progress and related industry.China is the extremely shortage of copper resource, the country that bauxite resource is abundant relatively, and refrigeration industry uses copper pipe in a large number at present, and copper changes aluminium reduction manufacture cost, the saving strategic resource has become crucial problem.But the copper pipe wall thickness majority that refrigeration industry relates to is below 1.0 millimeters; Because it is alternative fully that the peculiar advantage of copper pipe at aspects such as refrigeration pipe installation, after-sales services is difficult to by aluminum pipe, all adopt aluminum pipe to replace copper pipe can bring problems.And the centre be the aluminium two ends is copper aluminum bronze structure pipelines of copper, since identical at the special switching performance of aspects such as refrigeration pipe installation, after-sales service with copper pipe, pure copper tube can be replaced fully.

Current refrigerator industry has begun to adopt copper copper-aluminium structure connecting tube (seeing accompanying drawing 2), and after its copper pipe lap brazing by two sections different-diameters, mode and Al pipe butt welding that the end that diameter is big re-uses resistor pressure grafting weldering are one.Owing to adopt soldering tech to have defective workmanships such as reactive pore, outward appearance are not attractive in appearance; Realize that the batch process difficulty is big, cost of production is also very high.An and waste copper resource!

[summary of the invention]

The purpose of the utility model is: the copper-aluminium joint structure that designs a kind of aluminum pipe reducing; This copper-aluminium tube joint can be implemented under the diameter of the two kinds of materials situation inequality; Still can guarantee the normal utilization and the production in enormous quantities of thin wall copper aluminum pipe welding technique, can save copper class material more than 30% than the scheme (seeing accompanying drawing 2) of current use simultaneously.

The utility model technological scheme: a kind of copper-aluminium joint structure of aluminum pipe reducing, comprise different thin-wall copper pipe of diameter 1 and aluminum pipe 4, the copper and aluminium welding that copper pipe 1 has the draw to handle connects face 2, it is characterized in that: be processed with the reducing position on the aluminum pipe 4.Copper pipe that the specification that is welded to each other is different and aluminum pipe; Near the welding part of aluminum pipe, its diameter is changed through mechanical means; After promptly processing one section diameter close or identical with copper pipe; Again copper pipe is carried out the draw and handle, it can be inserted in the aluminum pipe that diameter taken place smoothly, accomplish the preparatory work (seeing accompanying drawing 1) of plug-in type copper aluminum pipe welding.The diameter that this structural type can make copper pipe with the aluminum pipe diameter not simultaneously, the quality that also can guarantee the welding of plug-in type resistor pressure meets technology and uses standard.

The utility model beneficial effect is: be convenient to mechanical mass production, the use that has reduced copper material relies on, and cost of production descends; Avoid manual brazing operation; Reduced leakage rate; Saved the use amount of strategic resource copper; Improved the aesthetic measure of product; Do not stay any being mingled with in the product.Through near the welding part of copper pipe, its diameter being changed through the mechanical technology method; The thin wall copper aluminum pipe of different size is welded together; Formation meets the joint of usage requirement, makes the plug-in type welding method between the thin-walled copper aluminium that purposes more widely arranged.

[description of drawings]

Fig. 1 is that the utility model aluminum pipe diameter changes the back by the sectional view of copper pipe insertion;

Fig. 2 is a native copper Al pipe butt welding structure sectional view;

Fig. 3 is that the utility model aluminum pipe carries out the sectional view that taper is processed at the reducing position;

Fig. 4 is that the utility model aluminum pipe carries out stepped reducing position sectional view;

Fig. 5 is that the utility model aluminum pipe carries out the partial sectional view that hole enlargement is handled.

Among the figure: 1, copper pipe, 2, the copper and aluminium welding handled of the draw connects face, 3, slick and sly reducing position, 4, aluminum pipe, 5, taper reducing position, 6, the soldering position, 7, the blister copper pipe.

[embodiment]

The copper-aluminium tube joint (like accompanying drawing 1) that present embodiment is welded for aluminum pipe 4 and copper pipe 1 by different-diameter; Its structure comprises: be processed with slick and sly reducing position 3 near the aluminum pipe 4 welding latter ends; The copper and aluminium welding that the copper pipe 1 and the draw are handled connects face 2 (seeing accompanying drawing 1); Because the copper and aluminium welding that aluminum pipe has the draw of slick and sly reducing position 3 and copper pipe to handle connects face 2, thereby the diameter that guarantees the copper aluminum pipe is approaching, guarantees the welding quality of inserted copper-aluminum pipe.

A kind of copper-aluminium joint structure of aluminum pipe reducing; Because the specification of copper pipe 1 and aluminum pipe 4 differs bigger; Consider method through machinery; Make the aluminum pipe 4 local slick and sly reducing positions 3 that form two groups of above ladder straight length structures, make the size of aluminum pipe 4 weld port and the diameter close or identical (like accompanying drawing 4) of copper pipe 1, form several sections ladder straight tube structure that diameter is different.

A kind of copper-aluminium joint structure of aluminum pipe reducing; If copper pipe 1 is bigger than the specification of aluminum pipe 4, can be near the welding part of aluminum pipe 4, through the method for machinery; Make its local slick and sly reducing position 3 that forms; This place increases the diameter of aluminum pipe 4, and it is close or identical with the diameter of copper pipe 1 to reach the size that makes aluminum pipe 4 weld port, to guarantee that copper pipe 1 inserts aluminum pipe 4 smoothly and forms the preparation work (seeing accompanying drawing 5) that effective copper and aluminium welding connects face 2.

In the above-described embodiments, the slick and sly reducing position 3 of aluminum pipe 4 can also can be the composition of straight length, taper pipeline section through mechanical method with the aluminum pipe 4 local forms that form taper reducing positions 5.

In the above-described embodiments, use can be made up in the slick and sly reducing position 3 of aluminum pipe 4 or taper reducing position 5.

In the above-described embodiments, it is that many groups constitute that the reducer of aluminum pipe 4 can be one group, can be that many groups constitute, for example: can be 1 group 2 groups/3 groups.

In the above-described embodiments, process screw thread or groove on the tube wall at the slick and sly reducing position 3 of aluminum pipe 4 or taper reducing position 5.

The slick and sly reducing position 3 of the aluminum pipe 4 of the foregoing description or the quantity at taper reducing position 5 can be one group, also can be that many groups constitute, for example: can be 1,2,3 group.

The present invention describes with reference to accompanying drawing and embodiment; But protection domain is not limited thereto; In technical scope of the present invention, have those of ordinary skill and can pass through simple conversion, and obtain the same technique effect of the present invention or change the mode of different materials, equally in protection scope of the present invention.

Claims

1. the copper-aluminium joint structure of an aluminum pipe reducing comprises different thin-wall copper pipe of diameter (1) and aluminum pipe (4), and the copper and aluminium welding that copper pipe (1) has the draw to handle connects face (2), and it is characterized in that: aluminum pipe is processed with the reducing position on (4).