CN2249852Y

CN2249852Y - Aluminum-plastic composite pipe joint

Info

Publication number: CN2249852Y
Application number: CN 95213868
Authority: CN
Inventors: 殷永江
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-07-04
Filing date: 1995-07-04
Publication date: 1997-03-19
Anticipated expiration: 2005-07-04

Abstract

The utility model relates to an aluminum-plastic composite pipe joint which composed of a joint core pipe, a joint outer sleeve and a joint inner sleeve. The joint inner sleeve and the joint core pipe can be integrated and can be separated independently. An outer thread of the joint core pipe is engaged with an inner thread of the joint outer sleeve. An annular cavity is formed between the joint outer sleeve and the joint inner sleeve or /and the joint core pipe, and is used for sheathing the aluminum plastic composite pipe after a port is expanded. The end of the annular cavity can be provided with a sealing ring, and the cavity of the ring and the joint core pipe or /and the joint outer sleeve are provided with threads. The threads are engaged with the thread of the aluminum plastic composite pipe. The utility model has the advantages of simple structure, convenient manufacture, convenient assembly and disassembly, small flow resistance, etc.

Description

Aluminium-plastics composite pipe joint

The utility model relates to a kind of joint of plastic-aluminum MULTILAYER COMPOSITE reinforced pipe, belongs to pipeline and connects fastening means.

Aluminium-plastic composite pipe, or claim plastic-aluminum MULTILAYER COMPOSITE reinforced pipe, be a kind of novel pipeline material, structure is made by glueing joint layer of aluminum alloy pipe (6b) in the middle of inside and outside two layers of polyethylene (or crosslinked polyethylene) pipe (6a, 6c) as shown in Figure 1.Intensity and deformation plasticity preferably that this pipe smooth in appearance and tool are higher.Therefore their joint is all different with the requirement of the joint of iron pipe, plastic tube or rubber pipe.

For aluminium-plastic composite pipe, many at present with joint connection shown in Figure 2.This joint is complex structure not only, and requirement on machining accuracy height, difficulty are big, the cost height, and also the internal diameter of joint core pipe is more much smaller than the internal diameter of connected aluminium-plastic composite pipe, makes pipe resistance big, has a strong impact on the fluid process.

The purpose of this utility model is to overcome the shortcoming of prior art, provides a kind of simple in structure, processing and easy accessibility, sealability and anti-pull-off ability strong, the plastic-aluminum combined interface tube that pipe resistance is little.

The utility model is formed by overlapping in joint core pipe, joint overcoat and the joint, and cover and joint core pipe can integrated or splits in the joint; The outside thread of joint core pipe and the internal thread interlock of joint overcoat; Cover in the joint is or/and the outer inner room of joint core pipe and joint forms a toroidal cavity, and the interior external diameter of toroidal cavity is slightly larger than the interior external diameter of aluminium-plastic composite pipe, and the plastic-aluminum combined tube opening after the expansion tightly is placed in this toroidal cavity; Overlap or/and joint is arranged with screw thread outward the threaded engagement of the aluminium-plastic composite pipe after this screw thread and the expansion in the toroidal cavity part, joint.

In order to carry sealing effect, can also aluminium-plastic composite pipe terminal with joint core pipe between or/and overlap in the joint and joint core pipe between add seal ring.

Be described further below in conjunction with drawings and Examples.

Fig. 3～Fig. 9 is seven kinds of embodiments of the present utility model;

Figure 10 is the processing scheme of the aluminium-plastic composite pipe that is connected with joint shown in Figure 3.

Referring to Fig. 3, the utility model is made up of cover (3) in joint core pipe (1), joint overcoat (2) and the joint, and cover (3) is connected as a single entity with joint core pipe (1) in the joint; Form a toroidal cavity in internal thread (5) interlock of the outside thread (4) of joint core pipe and joint overcoat, joint between cover (3) and the joint overcoat (2), the plastic-aluminum combined tube opening (6) after the expansion is placed in wherein.Seal ring (11) is positioned between aluminium-plastic composite pipe (6) end and the joint core pipe (1).With aluminium-plastic composite pipe (6) attachment portion, i.e. toroidal cavity part, cover (3) is provided with outside thread (7) in the joint, with internal thread (8) interlock of aluminium-plastic composite pipe (6); Joint overcoat (2) is provided with internal thread (9), with outside thread (10) interlock of aluminium-plastic composite pipe (6).

For strengthening sealing effect and improve resistance to plucking and take off ability, cover in the joint is or/and the toroidal cavity between joint core pipe and the joint overcoat can be made horn-likely, and inboard diameter is greater than outside diameter.

During installation, earlier joint overcoat (2) is inserted in aluminium-plastic composite pipe, with instrument the port of aluminium-plastic composite pipe is expanded into slightly horn-likely, can attack threading, see Figure 10 at inside and outside wall.Seal ring (11) is inserted in joint core pipe (1), again aluminium-plastic composite pipe is inserted in, at last the internal thread (5) of joint overcoat (2) is screwed in the outside thread of joint core pipe (1), tighten, promptly finish.

The other end of joint core pipe (1) can be provided with internal thread or outside thread or other interface modes, is connected with other joints or pipeline.

Because the internal diameter and the aluminium-plastic composite pipe difference in internal diameters of joint core pipe (1) are few, so flow resistance is little.

The scheme of Fig. 4 and Fig. 5 is similar to the scheme of Fig. 3, and cover (3) is integrated with joint core pipe (1) in the joint.

Embodiment shown in Figure 4, in the toroidal cavity part, cover (3) is provided with outside thread (7) and the joint overcoat is not established screw thread in the joint.Embodiment shown in Figure 4, then joint overcoat (2) be provided with internal thread (9) and in the joint cover do not establish screw thread, these two kinds of schemes all have good sealing effect and stretching resistance.

In the scheme of Fig. 6～Fig. 8, cover (3) is independent with joint core pipe (1) split in the joint.Toroidal cavity between joint core pipe (1) and the joint overcoat (2) is partly made horn shape, and is provided with seal ring (11), (12), and stretching resistance and sealing effect are fine, can be used for the connection of air conditioner pipeline etc.

The utility model also can save joint core pipe, and by cover, joint overcoat looping cavity in the joint, the plastic-aluminum combined tube opening after the expansion tightly is placed in the toroidal cavity, passes through threaded engagement between the aluminium-plastic composite pipe after joint overcoat and the expansion.As shown in Figure 9.

Advantage of the present utility model and good effect are good seal performance, and anti-pull-out force is strong, adds The worker is simple, easy accessibility, and flow resistance is little etc.

Claims

1. an aluminium-plastics composite pipe joint is characterized in that forming by overlapping in joint core pipe, joint overcoat and the joint, and cover and joint core pipe can integrated or splits in the joint; The outside thread of joint core pipe and the internal thread interlock of joint overcoat; Cover in the joint is or/and the outer inner room of joint core pipe and joint forms a toroidal cavity, and the inside and outside Bu Jing of toroidal cavity is slightly larger than the interior external diameter of aluminium-plastic composite pipe, and the plastic-aluminum combined tube opening after the expansion tightly is placed in this toroidal cavity; Overlap or/and joint is arranged with screw thread outward the threaded engagement of the aluminium-plastic composite pipe after this screw thread and the expansion in the toroidal cavity part, joint.

2. aluminium-plastics composite pipe joint according to claim 1, it is characterized in that can also aluminium-plastic composite pipe terminal with joint core pipe between or/and overlap in the joint and joint core pipe between add seal ring.

3. aluminium-plastics composite pipe joint according to claim 1 is characterized in that cover in the joint or/and the toroidal cavity between joint core pipe and the joint overcoat can be made horn-likely, and inboard diameter is greater than outside diameter.

4. an aluminium-plastics composite pipe joint is characterized in that the plastic-aluminum combined tube opening after the expansion tightly is placed in the toroidal cavity by cover, joint overcoat looping cavity in the joint, and the aluminium-plastic composite pipe after joint overcoat and the expansion passes through threaded engagement.