CN2247752Y

CN2247752Y - Adjustable seal gap pipe connector

Info

Publication number: CN2247752Y
Application number: CN 96208516
Authority: CN
Inventors: 杜茂林
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-12
Filing date: 1996-04-12
Publication date: 1997-02-19
Anticipated expiration: 2006-04-12

Abstract

The utility model relates to a pipe connector with an adjustable seal gap. A seal gap of the existing pipe connector can not be adjusted, when pipes have overlarge positive and negative deviation, the existing pipe connector has difficult installation or bad seal performance. The supporting surface of a sealing ring of the pipe connector is a slope-shaped annular surface with a radial diameter gradually reducing along the axial direction, an opening of the pipe connector is also provided with a propelling and positioning ring which can axially propel and position the O-shaped sealing ring, the seal gap is adjusted through the axial adjustment of the positioning ring, and therefore, the utility model achieves the aim of adjusting the elastic compression amount of the sealing ring. The utility model can adapt to the change of the deviation of different pipe diameters, and has the advantages of good sealing performance, simple structure, low cost and convenient assembly and disassembly.

Description

The tube connector of adjustable seal clearance

The invention belongs to a kind of spigot and socket type pipe link, be called for short joint.

Existing pipe, particularly the spigot-and-socket joint of plastic tube and fibre reinforced plastic tube adopts seal with O ring more, the seal form of this joint is: be provided with rectangular seal ring recess (see figure 1) in inner nosepiece wall, groove is embedded in O-ring seals, and joint is inserted in the termination that need is connected tubing.Show as Fig. 1, the AB face of seal groove is the axially mounting face, be used for stoping seal ring outside joint, to move at hydrodynamic pressure lower edge tube wall, the CD face is a confined planes, only limiting seal ring when connection is not pushed away away by pipe end, BC face and outer pipe wall form the sealing surface of two radial support seal rings, the fluid in the salable pipe of elastic compression amount that O-ring seals produces between these two sealing surfaces.The seal ring of this sealing means is located in the seal groove, and is constant substantially along the tube axial direction position.And tubing always has certain deviation aborning, and when producing overgauge, reduce in two sealing surface gaps, and O-ring seals elastic compression amount increases, and difficulty is installed; When producing negative deviation, O-ring seals elastic compression amount reduces, and the sealability variation is prone to leakage, and the axial friction that produces between while and the tubing diminishes, and tubing is easily moved outside joint under the sealing-fluid pressure effect.Employing solution is as shown in Figure 2 arranged in the prior art, promptly on joint, fix tubing locking circle 2 by joint end cap 3, locking circle inwall is established an inclined-plane, and the wedge ring of also establishing a band inclined-plane between the outer pipe wall is in order to the axial friction of increase with tubing, locking tubing, this structure has not only increased the joint cost, and makes tubing that corner (for rigid joint) can not be arranged in the joint, therefore only can adopt on small-bore pipe plastic tube.

The present invention aims to provide a kind of seal clearance size of can regulating to adapt to the tube outer diameter deviation, good seal performance, tube connector simultaneously simple in structure, easy for installation.

The technological scheme that realizes above-mentioned purpose is (in conjunction with Fig. 3 embodiment explanation): the present invention includes adapter body 5, be positioned at the seal ring 4 of adapter body inner chamber, it is characterized in that described seal ring is an O-ring seals, the O-ring seals radial support face of adapter body inwall is the sloping shape ring surface that reduces gradually vertically of diameter from outside to inside, and the joint opening establishes one can the axial advance O-ring seals and the propelling positioning ring 7 of axially locating.

The working principle of this joint is: after tubing is inserted the joint opening, O-ring seals is clipped between inner nosepiece wall slope shape annular support surface and the outer pipe wall, then with advancing positioning ring 7 axial advance O-ring seals 4, because the radial seal gap dwindles vertically gradually, so O-ring seals elastic compression amount increases gradually with axial advance, reaching suitable degree can will advance the positioning ring location.

This joint can not change under the prerequisite that adopts the good standard piece O-ring seals of intensity, regulate the size of seal clearance by positioning ring, thereby both made and to bigger tube outer diameter deviation O-ring seals has been reached enough elastic compression amounts are arranged, guarantee that it has reliable sealing performance, also can make by the adjusting of seal ring elastic compression amount simultaneously between itself and the tubing has enough big surface friction drag to pin tubing, save the locking circle, simple in structure, reduced cost.The easy installation and removal of this joint, and can allow the tubing of joint that the corner of 1-2 degree is arranged, help engineering and use.The seal ring supporting surface of this joint is axially intilted in addition, and the pipe end that is beneficial to certain ovality inserts joint, and this connects particularly necessary to heavy caliber pipe.This joint is applicable to that working pressure is not more than the hard tube and the medium-soft pipe of the various materials of 80Mpa, and pipe diameter can reach 2000mm, even bigger, can be used for footpath, reducing, threeway, four-way, curves etc. on the connected element.

Description of drawings

Fig. 1, prior art embodiment's 1 structural representation

Fig. 2, prior art embodiment's 2 structural representations

1-tubing 2-tubing locking circle 3-joint end cap

4-seal ring 5-adapter body 6-wedge ring

Fig. 3, the embodiment of the invention 1 structural representation

7-advances positioning ring

Fig. 4, the embodiment of the invention 2 structural representations

The 8-bolt and nut

Embodiment 1 (referring to Fig. 3, because joint two ends symmetry, so only draw half)

This routine inner nosepiece wall opening the last period is for may maximum diameter greater than tubing and 2 times of O-ring seals diameter sums,, the cylindric ring surface that have internal thread parallel with tubular axis, its rear portion is one with tubular axis the coniform O-ring seal supporting surface of one outside subtended angle to be arranged, and O-ring seals is between this face and outer pipe wall.Described propelling positioning ring 7 outer walls are connected with joint opening tubular inner thread, and its inner end contacts with the O-ring seals that is positioned at the coniform annular support surface of aforementioned seal ring place.

During use, turn propelling and enclose the 7 elastic compression amounts that can adjust O-ring seals surely.

Embodiment 2 (referring to Fig. 4)

This routine seal ring supporting surface is made up of two domatic CD and DE that are different amount with tubular axis.Described propelling positioning ring 7 is positioned at the step flange of the connector interface outside gap parallel with the reservation of adapter body open front face and by being connected with the parallel adjustable bolt nut 8 of tubular axis, its inner end contacts with O-ring seals.

During use, adjust the elastic compression amount that bolt and nut 8 can be adjusted O-ring seals.

Claims

1, the tube connector of adjustable seal clearance, include adapter body (5), be positioned at the seal ring (4) of adapter body inner chamber, it is characterized in that described seal ring is an O-ring seals, the O-ring seals radial support face of adapter body inwall is the sloping shape ring surface that reduces gradually vertically of diameter from outside to inside, and the joint opening is provided with can the axial advance O-ring seals and the propelling positioning ring (7) of axially locating.

2, the tube connector of adjustable seal clearance according to claim 1, it is characterized in that: described propelling positioning ring (7) outer wall is threaded with joint opening circle tube inner wall, and its inner end contacts with the O-ring seals that is positioned at shape annular support surface place, described seal ring slope.

3, the tube connector of adjustable seal clearance according to claim 1, it is characterized in that: described propelling positioning ring (7) is positioned at the step flange of the connector interface outside gap parallel with the reservation of adapter body open front face and by being connected with the parallel adjustable bolt nut (8) of tubular axis, its inner end contacts with O-ring seals.

4, require the tube connector of 1,2,3 described adjustable seal clearances according to profit, it is characterized in that: the radial support face of the O-ring seals of described adapter body inwall is made up of two sloping shape ring surfaces that are different amount with tubular axis.