CN2479333Y

CN2479333Y - Leak-proof pipe fitting

Info

Publication number: CN2479333Y
Application number: CN 01239002
Authority: CN
Inventors: 冯国平; 孟秋; 冯平峰
Original assignee: MINGSHI PIPE INDUSTRY Co Ltd ZHEJIANG
Current assignee: MINGSHI PIPE INDUSTRY Co Ltd ZHEJIANG
Priority date: 2001-04-24
Filing date: 2001-04-24
Publication date: 2002-02-27
Anticipated expiration: 2011-04-24

Abstract

The leakage proof pipe fitting of the utility model is in particular used for mechanical connection of flexible plastic duct lines. The utility model is formed by sleeve connection of a pipe fitting body 1 and flexible pipes. The external surface of the connection position of the pipe fitting body 1 is equipped with pawls and ring-shaped grooves for installing sealing rings. A cap nut 7 is tightened on the screw threads equipped on the external surface of the pipe fitting body 1, and is pushed against a C-shaped ring sleeve tightly. The C-shaped ring sleeve is sleeved on the flexible pipes. At least one of the ring-shaped grooves equipped with sealing rings is positioned out the compression area of the C-shaped ring sleeve.

Description

The leakage proof pipe fitting

The utility model relates to a kind of pipe connecting component, especially relates to a kind of flexiplastic pipeline system connects (comprising that clamp-press type connects) with thread type leakage proof pipe fitting.

Aluminium-plastic composite pipe (PAP, XPAP), crosslinked polyethylene pipe flexible plastic pipes such as (PEX) are connected the back and are being subjected to external force effect generation bending or are very easily producing the seepage phenomenon owing to the influence of temperature change sealing effect with pipe fitting.What flexiplastic pipeline system thread type connection pipe fitting adopted at present is interconnecting by nut and pipe fitting body, promote C shape ring (or claiming clip) and enter (built-in seal ring place) radial contraction in the cooperation conical surface, thereby compress flexible plastic pipe and seal ring, realize being connected and sealing of tubing and pipe fitting.Because this Placement makes seal ring be in compressive state all the time, does not have the expansion space during temperature variation, certainly will still lose its elastic compensating function in the course of time and lose seal action.

The utility model purpose is to provide a kind of flexiplastic pipeline, leakage proof, sealing effect excellence, pipe connecting component safe and reliable, easy for installation of being used for.

Leakage proof pipe fitting described in the utility model, leakage proof pipe fitting in particular for the connection of flexiplastic pipeline system mechanics formula, constitute by pipe fitting 1 and flexible pipe socket, described pipe fitting 1 connection part outer surface has pawl and is used to install the annular groove of seal ring, nut 7 is tightened on the screw thread of pipe fitting 1 appearance and holds out against on described C shape ring set, described C shape ring set is socketed on the flexible pipe, and the annular groove that seal ring is set has at least outside the pressurized zone that is positioned under the described C shape ring set.

Described a kind of leakage proof pipe fitting has been set up a metal protection protector 6, its head and the socket of described C shape ring set, and afterbody and flexible pipe socket, described nut holds out against on C shape ring set by protecting jacket 6.

Major advantage of the present utility model is: the one, and at least one seal ring is not in normal pressure under the C shape ring set state that contracts, and expands in the time of varying with temperature, and gives full play to the elastic compensating function, and seal action significantly improves; The 2nd, protecting jacket is set, the stability of back connection part guarantee to be installed, to have eliminated that because external force and temperature variation make tubing produce distortion sealed section is changed, thereby influence sealing effect, the while protecting jacket can also play the effect of preventing nut loosening; The 3rd, increased pipe fitting connecting end slenderness ratio, further improved the reliability and stability that connect.The 4th, connecting end is provided with many pawls, and inner wall section distortion back, the stressed back of flexiplastic tubing is embedded in the pawl, makes system connect back anti-slip ability and improves (reliability increase); The 5th, this pipe fitting processing, easy to use, cost is low.

Further specify the utility model below in conjunction with accompanying drawing.

Fig. 1 is a structure sectional view of the present utility model;

Fig. 2 is a STRUCTURE DECOMPOSITION schematic representation of the present utility model

With reference to accompanying drawing, the utility model is made up of pipe fitting 1, spacer ring 2,

seal ring

3 and 4, C shape ring 5, protecting jacket 6, nut 7.

Pipe fitting 1 is provided with outside thread 9, groove 10, inner conical surface 11, annular groove 12 and annular groove 14, pawl 13, and C shape is encircled 5 two ends and is provided with the conical surface 15 and the conical surface 16, and protecting jacket is provided with the enlarging conical surface 17, and nut 7 is provided with inner conical surface 18.Spacer ring 2 places in pipe fitting 1 upper groove 10, and

seal ring

3,4 places respectively on the pipe fitting 1 in the

annular groove

12,14.

When flexiplastic tubing 8 is connected with pipe fitting; earlier nut 7, protecting jacket 6, C shape ring 5 are enclosed within on the flexiplastic tubing 8; again flexiplastic tubing 8 is enclosed within on the pipe fitting 1; C shape ring 5 is moved to flexiplastic tubing 8 ends; contact with inner conical surface 11 on the pipe fitting 1; nut 7 is connected with outside thread 9 on the pipe fitting 1; nut 7 inner conical surfaces 18 are cooperated with the protecting jacket 6 bottom enlarging conical surfaces 17 and C shape is encircled 5 conical surfaces 15 to advance and make C shape ring radial contraction in the inner conical surfaces, thereby make flexiplastic tubing 8 produce plastic deformations and embed in pipe fitting 1 upper inverted tooth 13.

The utility model can be applicable to pipeline connecting parts such as above straight-through, the right angle that connects flexiplastic tubing of an end or an end, threeway, water knockout drum, ball valve.

The utility model is applicable to the connection of aluminium-plastic composite pipe (PAP, XPAP), crosslinked polyethylene pipe (PEX) system.

Claims

1. leakage proof pipe fitting, leakage proof pipe fitting in particular for the connection of flexiplastic pipeline system mechanics formula, constitute by pipe fitting 1 and flexible pipe socket, described pipe fitting 1 connection part outer surface has pawl and is used to install the annular groove of seal ring, nut 7 is tightened on the screw thread of pipe fitting 1 appearance and holds out against on described C shape ring set, described C shape ring set is socketed on the flexible pipe, it is characterized in that: the annular groove that seal ring is set has at least outside the pressurized zone that is positioned under the described C shape ring set.

2. the described a kind of leakage proof pipe fitting of claim 1 is characterized in that: set up a metal protection protector 6, and its head and the socket of described C shape ring set, afterbody and flexible pipe socket, described nut holds out against on C shape ring set by protecting jacket 6.