CN2377420Y - Aluminium-plastics composite pipe joint - Google Patents

Abstract

The utility model relates to a joint, particularly a pipe joint which is suitable for a gas pipe and a water pipe. The pipe joint which is suitable for a gas pipe and a water pipe comprises a joint member and a pressing nut. A C-shaped tightening ring is arranged between the inner surface of the pressing nut and a pipe head. Outer circles on two ends of the C-shaped tightening ring are in conical surfaces. The joint member comprises a connecting bolt which is connected with the pressing nut by a thread, and a joint body which is inserted by a middle pipe of the joint member. Inner conical surfaces which are corresponding to the C-shaped tightening ring are arranged on the top of the connecting bolt and the position of the inner edge wall on the rear end of the pressing nut. The pipe joint which is suitable for a gas pipe and a water pipe has reasonable structure and good sealing performance. The pipe joint which is suitable for a gas pipe and a water pipe overcomes the defects that old joint pipes are connected by a thread, and the labor intensity of installaion and disassembly is alleviated.

Description

Aluminium-plastics composite pipe joint

The utility model relates to a kind of joint, is particularly useful for coal gas, water pipe pipe joint.

The tradition gas pipe all adopts galvanized pipe, so pipe joint generally all use and be threaded, and dismounting is very inconvenient like this, and is not only time-consuming but also require great effort.And along with the extensive use of recent novel aluminum-plastic composite pipe in gas pipe, water pipe, originally no longer suitable with the pipe joint that is threaded.

The purpose of this utility model is to provide at the present situation of prior art the joint of a kind of easy accessibility, good airproof performance, suitable aluminium-plastic composite pipe connection.

Goal of the invention of the present utility model is achieved by the following scheme: this joint comprises the adapter piece and the gland nut that is threaded with adapter piece that connect with exterior part, one C shape retaining ring is arranged between gland nut internal surface and tube head, retaining ring two ends cylindrical is the conical surface, adapter piece comprises the connecting bolt that is threaded with gland nut and is positioned at the fittings body that the adapter piece intermediate tube inserts, is equipped with and the corresponding inner conical surface of retaining ring at the inner wall place of bolt top and gland nut rear end.

Several inverted cone surfaces can be established in described fittings body top, and one section annular groove is arranged under it, cover one seal ring in the groove.

Described retaining ring inwall can have the striped circle of protrusion.

Simple and reasonable, the good airproof performance of the utility model overcome the defective that old-fashioned joint pipe is threaded, and alleviated the labor intensity of installation, dismounting greatly, is a kind of very good substitute material of existing gas pipe, water pipe pipe joint.

Description of drawings:

Fig. 1 is a structural representation one of the present utility model.

Fig. 2 is a structural representation two of the present utility model.

Embodiment to the utility model is described further below in conjunction with accompanying drawing:

As shown in Figure 1, this aluminium-plastics composite pipe joint is made of copper, and it comprises adapter piece 1, gland nut 2 and retaining ring 4.Adapter piece 1 comprises the fittings body 5 that connecting bolt 6 that is threaded with gland nut 2 and the pipe that is positioned at adapter piece 1 middle part are inserted, tighten up and sealing effect in order to strengthen, be shaped on several inverted cone surfaces at fittings body 5 tops, one section annular groove is arranged under it, cover one seal ring 3 in the groove.Retaining ring 4 is between gland nut 2 internal surfaces and tube head, and is c-shaped, is the conical surface at its two ends cylindrical, for increasing tightening force, is shaped on the striped circle of protrusion at inwall.Be shaped on the conical surface corresponding respectively with retaining ring 4 at the inner wall place of the inner wall place at bolt 6 tops and gland nut 2 rear ends, when nut 2 screws on bolt 6, two inner conical surfaces compress the conical surface at retaining ring 4 two ends respectively, make retaining ring 4 produce resiliently deformable, clamping tube is realized the connection and the sealing of pipe fitting.

The other end of the utility model adapter piece can multi-formly occur, as is designed to be made as with it attaching nut of one, then can connect (as shown in Figure 1) with gas meter; As be designed to be made as two mouth ball valves of one with it, then can follow two-tube connection (as shown in Figure 2).

Claims (3)

1. aluminium-plastics composite pipe joint, comprise an adapter piece (1) and a gland nut (2) that is threaded with adapter piece (1) that connects with exterior part, it is characterized in that: a C shape retaining ring (4) is arranged between gland nut (2) internal surface and tube head, retaining ring (4) two ends cylindrical is the conical surface, adapter piece (1) comprises the fittings body (5) that the connecting bolt (6) that is threaded with gland nut (2) and adapter piece (1) intermediate tube insert, and is equipped with and the corresponding inner conical surface of retaining ring (4) at the inner wall place of bolt (6) top and gland nut (2) rear end.

2. aluminium-plastics composite pipe joint as claimed in claim 1 is characterized in that: described fittings body (5) top is provided with several inverted cone surfaces, and one section annular groove is arranged under it, cover one seal ring (3) in the groove.

3. aluminium-plastics composite pipe joint as claimed in claim 1 is characterized in that: described retaining ring (4) inwall has the striped circle of protrusion.

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