CN2424352Y

CN2424352Y - Union joint

Info

Publication number: CN2424352Y
Application number: CN 99252035
Authority: CN
Inventors: 费成明
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-12-09
Filing date: 1999-12-09
Publication date: 2001-03-21
Anticipated expiration: 2009-12-09

Abstract

The utility model relates to a union joint which comprises a union joint body, a nut screwed on the union joint body, and a collar clamped between the union joint body and the nut. The end angle of the bulgy screw thread slot on the union joint body forms a rounded angle shape; namely the port of the bulgy screw thread slot forms a circular arc shape. The utility model can be tightly jointed with plastic pipes, the leakage of the union joint does not occur, and the plastic pipe does not slip out from the union joint. The jacketed type union joint is corrosion resistant and high pressure resistant, and is suitable for the connection of polyethylene pipes, polybutylene pipes and other novel plastic pipes; the utility model can be made into various specifications, such as three-way, elbow piece, direct connection, etc., and can connect plastic pipes with different calibers.

Description

Pipe joint

The utility model relates to the five metals pipe fitting, particularly a kind of jacketed type pipe joint.

The existing pipe joint that is connected with plastic tubes such as polyethylene pipe, Polybutylene Pipes, the screw thread wire casing end angle of its protrusion has and is tip-angled shape, also have and to be flat-head shape, screw thread wire casing on the pipe joint screws in the plastic tube, pipe joint and plastic tube combine, because plastic tube can shrink phenomenon, seepage appears in pipe joint easily, moreover plastic tube also skids off from pipe joint easily.Rubber seal also is equipped with at the screw thread wire casing place of existing pipe joint, and rubber seal is very easily aging, causes the pipe joint seepage easily.

The purpose of this utility model provides a kind of improved pipe joint, and it and plastic tube can closely combine, and pipe joint seepage can not occur, and plastic tube can not skid off from pipe joint yet.

A kind of pipe joint described in the utility model comprises pipe joint, the nut of rotation set on pipe joint, and between pipe joint and nut clamped collar, the end angle of the screw thread wire casing that protrudes on the described pipe joint is the fillet shape, the screw thread wire casing port that is promptly protruded is circular shape.

Jacketed type pipe joint of the present utility model is made by copper material or steel, it is a kind of corrosion-resistant, high voltage bearing pipe joint, be applicable to the connection of novel plastics pipe such as polyethylene pipe, Polybutylene Pipe, can be made into threeway, elbow, plurality of specifications such as straight-through, can connect the plastic tube of different bores.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the pipe joint of existing band tip-angled shape screw thread wire casing.

Fig. 2 is the pipe joint of existing band flat-head shape screw thread wire casing.

Fig. 3 is the pipe joint structure schematic representation of band fillet shape screw thread wire casing of the present utility model.

As shown in Figure 1, the screw thread wire casing that protrudes on existing a kind of pipe joint is tip-angled shape.

As shown in Figure 2, the screw thread wire casing that protrudes on existing a kind of pipe joint then is flat-head shape.

Referring to Fig. 3, pipe joint integral body of the present utility model comprises pipe joint 1, the nut of rotation set on pipe joint 1, and between pipe joint 1 and nut clamped collar.The end angle of the screw thread wire casing 2 that protrudes on the pipe joint 1 is the fillet shape, and screw thread wire casing 2 ports that promptly protruded are circular shape.

On the connection part of pipe joint 1 and plastic tube the screw thread wire casing 2 that has protrusion is arranged all, screw thread wire casing 2 smooth surfaces, be circular-arc, the connection of the two is that the plastic tube rotation set is inserted on the pipe joint 1, put collar again, screw on nut, under the drive and compressing of collar, the screw thread wire casing 2 that protrudes on the pipe joint 1 just embeds plastic tube, the two closely combines to make pipe joint 1 and plastic tube, preventing the medium seepage, and can not be subjected to moving or the influence of displacement, avoided the easy shrinkage factor of plastic tube simultaneously, plastic tube can not skid off from pipe joint 1 yet.

The utility model has been cancelled original rubber seal in the installing of screw thread wire casing place, and the problem of aging of having avoided rubber seal to bring has been saved cost of production on making.

Claims

1. pipe joint, it comprises pipe joint, the nut of rotation set on pipe joint, and between pipe joint and nut clamped collar, it is characterized in that the end angle of the screw thread wire casing that protrudes on the described pipe joint is the fillet shape, the screw thread wire casing port that is promptly protruded is circular shape.