CN201014083Y

CN201014083Y - Copper-aluminium welding pipe

Info

Publication number: CN201014083Y
Application number: CNU2007200789431U
Authority: CN
Inventors: 刘华安
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-30
Filing date: 2007-03-30
Publication date: 2008-01-30
Anticipated expiration: 2017-03-30

Abstract

The utility model discloses a copper and aluminum welded pipe, comprising a copper pipe and an aluminum one. One end of the copper pipe welded with the aluminum pipe is provided with a tapered convex ring, and the outer diameter of the copper pipe is equal to the inner diameter of the aluminum pipe. The utility model has the advantages of low material cost, strong welding, no easy leakage, simple technics, easy control for the welding quality, and corrosion resistance. The utility model is applied to an evaporator pipe in a refrigerator or a freezer.

Description

Copper and aluminium welding is taken over

Affiliated technical field

The utility model relates to the accessory of chiller plant, especially the circulating line of vaporizer in refrigerator, the refrigerator-freezer.

Background technique

At present, the vaporizer in most refrigerators, the refrigerator-freezer through being made of welded connection, and is the butt joint welding by many metal tubes.The shortcoming of this welding manner is that because tube wall is thinner, solder joint is many, it is little to be welded to connect area, insecure, and welding quality is difficult to guarantee, cause the solder joint place easily to reveal, and can only adopt the pipe (mostly being copper pipe) of metal of the same race to weld, cost of material is higher relatively.The evaporator tube that adopts copper and aluminium welding to connect is also arranged, but between two tube walls that have the space is arranged, because the effect of potential difference easily produces corrosion to tube wall, corrosion resistance is relatively poor, influences working life; The welding procedure complexity that has, cost is higher.

The model utility content

In order to overcome the deficiency that welding manner is taken in the vaporizer copper and aluminium welding in existing refrigerator, the refrigerator-freezer, the utility model provides lower, the difficult leakage of a kind of cost, welding quality is controlled easily and corrosion resistant copper and aluminium welding is taken over.

The technological scheme that its technical problem that solves the utility model adopts is: copper and aluminium welding is taken over, and comprises copper pipe and aluminum pipe, and an end of copper pipe and Al pipe butt welding has the bulge loop of a taper, and the external diameter of copper pipe equals the internal diameter of aluminum pipe.

Copper pipe inserts in the aluminum pipe, and is welded on the aluminum pipe inwall; Bulge loop maximum outside diameter on the copper pipe equals the external diameter of aluminum pipe.

The beneficial effects of the utility model are, owing to substituted most copper pipe with aluminum pipe, cost of material reduces, and copper pipe is littler than the diameter of aluminum pipe in addition, has saved material, has also reduced cost; And drive fit does not have the gap between two tube walls, has avoided producing potential difference between the two, and causes the corrosion to inner tube wall, and bonding area is bigger, firmly be difficult for revealing, and technology is simple, and easy to operate, welding quality is controlled easily.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is an aluminum pipe structural representation in the utility model;

Fig. 3 is a copper pipe structural representation in the utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

As Fig. 1,2,3, copper and aluminium welding is taken over by copper pipe 1 and is inserted in the aluminum pipe 2, and copper pipe 1 has a taper bulge loop 1.1 with an end of aluminum pipe 2 welding, and its maximum outside diameter equals the external diameter of aluminum pipe 2, and the external diameter of copper pipe 1 equals the internal diameter of aluminum pipe 2.Copper pipe 1 inserts in the aluminum pipe 2, and adopts the resistance welding mode to be welded on aluminum pipe 2 inwalls.

Copper pipe 1 makes the surface of contact fusing owing to heat up when inserting aluminum pipe 2, both are in conjunction with firmly, because the corrosion of refrigeration agent to tube wall avoided in no gap; When aluminum pipe contacted with the bulge loop 1.1 of taper, the fusing of the termination of aluminum pipe 2 formed face of weld at bulge loop 1.1 places and aluminum pipe 2, has guaranteed both firm welding, and made the joint that one smooth transition be arranged that bulge loop 1.1 also plays the effect of location.

In conjunction with the accompanying drawings embodiment of the present utility model has been carried out exemplary description above, obviously the utility model is not limited thereto, and the various remodeling that carry out in the utility model scope all do not exceed protection domain of the present utility model.

Claims

1. a copper and aluminium welding is taken over, and comprises copper pipe (1) and aluminum pipe (2), it is characterized in that, an end of copper pipe (1) and aluminum pipe (2) welding has the bulge loop (1.1) of a taper, and the external diameter of copper pipe (1) equals the internal diameter of aluminum pipe (2).

2. copper and aluminium welding according to claim 1 is taken over, and it is characterized in that, described copper pipe (1) inserts in the aluminum pipe (2), and is welded on aluminum pipe (2) inwall.

3. copper and aluminium welding according to claim 1 is taken over, and it is characterized in that described bulge loop (1.1) maximum outside diameter equals the external diameter of aluminum pipe (2).