CN2154942Y

CN2154942Y - Double-clamping sleeve blow-out patch

Info

Publication number: CN2154942Y
Application number: CN 93212394
Authority: CN
Inventors: 颜扬标
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-14
Filing date: 1993-05-14
Publication date: 1994-02-02
Anticipated expiration: 2003-05-14

Abstract

The utility model discloses a double-clamp sleeve joint. The utility model is mainly composed of a joint body 1, a screw nut 2, a front clamp sleeve 3 and a back clamp sleeve 4. The back clamp sleeve 4 and the front clamp sleeve 3 are successively arranged between the screw nut 2 and the joint body 1. Compared with the single-clamp sleeve joint, the utility model has the advantages of double-line sealing and good sealing performance. No torque is passed to the connected pipes when the utility model is assembled, and reliable operation of the pipe-line system is ensured.

Description

Double-clamping sleeve blow-out patch

The utility model relates to a kind of pipe coupling, is a kind of pair of cutting ferrule pipe joint specifically.

Pipe joint is the hydraulic element that hydraulic pressure in the industry such as machinery, chemical industry, space flight, aviation, pressure system extensively adopt.The FERRULETYPE joint that uses is the single deck tape-recorder sleeve joint at present.Be to have only a cutting ferrule 4 between fittings body 1 nut 2.The sealing means of single deck tape-recorder cover is the single line sealing, and sealing effect is poor, exists leakage of oil, gas leak phenomenon, and it is 200 kg/cm that maximum is born pressure, and the single deck tape-recorder cover is disposable cutting ferrule.When with single deck tape-recorder cover sealed pipe joint, cutting ferrule is stuck on the pipe tightly, can not rotate, so during tightening nuts, the whole piece pipe and then rotates, the installation of inconvenient pipe.The nut of single deck tape-recorder cover is a tetragonal, intensity difference.

Two FERRULETYPE joints that the purpose of this utility model provides a kind of good seal performance, pipe does not rotate with nut when tightening pipe joint.

The purpose of this utility model is achieved in that two cutting ferrule pipe joints are made up of fittings body 1, nut 2, preceding cutting ferrule 3 and back cutting ferrule 4, and back cutting ferrule 4 and preceding cutting ferrule 3 are put between nut 2 and the fittings body 1 successively.Preceding cutting ferrule 3 is a cone-shaped ring, and semi-cone angle α is 13 °-17 °, and the endoporus upper end of preceding cutting ferrule 3 is shaped on chamfering A.The taper chamfering that matches with the conical surface of preceding cutting ferrule 3 is arranged on the fittings body 1, and its semi-cone angle β is 18 °-22 °.There is a undercut ss that matches with preceding cutting ferrule 3 chamfering A the lower end of back cutting ferrule 4.Nut 2 is a hexagon.Two cutting ferrule pipe joints after the assembling, the cone match of the conical surface of preceding cutting ferrule 3 and fittings body 1 endoporus upper end, the chamfering B of back cutting ferrule 4 lower ends and preceding cutting ferrule 3 top chamfering A match, and nut 2 and fittings body 1 screw.

The advantage of two cutting ferrule pipe joints is: pipe joint can repeatedly be installed and removed still can keep excellent sealing performance, and test shows that after mounting or dismounting 15 times, when suppressing to 420 kg/cm, copper tube breaks, and two cutting ferrule pipe seal is still good.Two cutting ferrule pipe joints are two-wire sealings.When two cutting ferrule pipe joint tightening nuts was installed, the part in the joint is motion vertically only, and do not have and rotate, Gu and there is not torsion to pass to pipeline, there is not internal stress in pipeline, has guaranteed the reliability of pipe-line system work.Nut is a hexagonal structure, has increased the intensity of pipe joint.

Fig. 1 is the ssembly drawing of two cutting ferrule pipe joints;

Fig. 2 is a back cutting ferrule sectional view;

Fig. 3 is preceding cutting ferrule sectional view;

When two cutting ferrule pipe joint was installed, inserted tube end in the fittings body 1 end that nut 2, back cutting ferrule 4, preceding cutting ferrule 3 are inserted in pipe 5 successively again earlier, and the hand-tight make-up nut when twisting when motionless, is used Wrench instead, nut is rotated further 1.25 circles gets final product.

Claims

1, a kind of pair of cutting ferrule pipe joint is made up of fittings body 1, nut 2 and cutting ferrule, it is characterized in that said cutting ferrule serve as reasons before two cutting ferrules of forming of cutting ferrule 3 and back cutting ferrule 4; Back cutting ferrule 4 and preceding cutting ferrule 3 are put between nut 2 and the fittings body 1 successively.

2, as claimed in claim 1 pair of cutting ferrule pipe joint, cutting ferrule 3 is a cone-shaped ring before it is characterized in that, semi-cone angle α is 13 °-17 °; Preceding cutting ferrule 3 endoporus upper end is shaped on chamfering A; The taper chamfering that matches with the conical surface of preceding cutting ferrule 3 is arranged on the fittings body 1, and its semi-cone angle is 18 °-22 ° of β; There is a chamfering B who matches with preceding cutting ferrule 3 chamfering A the lower end of back cutting ferrule 4; The profile of nut 2 is a hexagon.