CN201554849U

CN201554849U - V-shaped corrugated-toothed combined gasket

Info

Publication number: CN201554849U
Application number: CN2009200627652U
Authority: CN
Inventors: 张海运
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-08-21
Filing date: 2009-08-21
Publication date: 2010-08-18
Anticipated expiration: 2019-08-21

Abstract

The utility model relates to a semi-self-tightening type V-shaped corrugated-toothed combined gasket, a plurality of channels of concentric arc-shaped trenches are processed on the upper surface and the lower surface of a framework, a plane is arranged on one side surface at the inner diameter of the gasket, the composite gasket made of non-metallic material (graphite) with the appropriate thickness is formed on the surface of the framework, a gap exists between the plane at the inner diameter of the gasket and a flange after mounting the gasket, and the gap is filled with medium pressure after increasing the pressure. The V-shaped corrugated-toothed combined gasket realizes good sealing effect by relying on the medium pressure.

Description

The V-type corrugated serrated compound gasket

Affiliated technical field:

The utility model relates to the Sealing industry of mechanical chemical industry, especially can rely on pressure medium to produce and realize self-packing V-type wave tooth composite gasket.

Background technique:

The present known metallic packing that can be applied to flange facing form commonly used has: flat metallic gasket, metal corrugated gasket, metal flute profile pad, metal hollow O V-shaped ring etc.But with upper metallic gasket all are positive drive type sealings, wait mal-condition following time in that the temperature and pressure fluctuation is bigger, and card is cannot say for sure in the big sealing of required preload pressure.Though bimetal ripple tooth pad in the market has the selfsealings performance, but the processing technology complexity, manufacturing procedure is many, and to the requirement height of equipment, labor intensive is many, and the mass production difficulty is higher.(drawing) from " sealing technique " Wei Long chief editor 2004.

The task of innovation and creation and purpose:

Because the influence of the fluctuation of the temperature and pressure sealing effect of pad when big, and pretightening force requires big problem in order to overcome.The utility model provides a kind of metal ripple tooth pad with half self tightening, has obviously improved the sealing effect of gasket seal, and simple in structure, difficulty of processing is little, and technological requirement is low.

The technological scheme that its technical problem that solves the utility model adopts is:

The utility model is on the basis of common corrugated serrated compound gasket, by its special structural design (as Fig. 1), end, inner radius one side groove is a V-shaped groove, the V-shaped groove side is a plane, is installed on the flange, after boosting, under the pressure medium effect, make pad plane and groove place be full of pressure, skeleton is adjacent to the flange upper and lower surface by inner radius upper surface and lower surface V-shaped groove spike, produces the self-tightening effect.

Pad is installed on the flange, and behind the bolt pretension, the crest on the pad circular arc contacts with flange facing up and down, produces plastic deformation, forms a plurality of line contact sealings with pressure reduction space, sets up initial sealing.Pressure makes the inboard place of pad skeleton upper surface spike and below V-shaped groove spike be adjacent to flange facing, and pressure increases, and it is tight more to fit, and compares with other positive drive type sealings, and its needed impacting force will effectively reduce, and significant sealing affection improves.

The advantage of innovation and creation and good effect:

Advantage of the present utility model and good effect are to rely on pressure medium that the part sealing surface is realized selfsealings, and pressure medium rises, and sealing surface pastes tightly more.Skeleton is the ripple dentation structure, and multiple tracks metal-toothed peak can play the wire seal action, not only has the good sealing stickiness but also the microdefect on Compensating flange surface well and be filled with nonmetallic material such as Expanded graphite on the arc-shaped groove.Sealing of V-type wire that corrugated serrated compound gasket has and nonmetal double action as the Expanded graphite sealing, thereby make it under lower pad stress, can reach higher sealing.The safety reliability height, easy to install and use, the integral rigidity structure of V-type corrugated serrated compound gasket makes it the spiral wound gasket situation of " falling apart " like that can not occur in transportation and installation process, and it is simple in structure, manufacturing process is uncomplicated, less demanding to equipment, engine lathe just can mass production.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is further specified:

Fig. 1 is a metal frame sectional view of the present utility model.

Fig. 2 is the whole sectional view of the utility model product.

Fig. 3 is the installation view of the utility model on male and female flange.

Skeleton is by the metal material manufacturing in Fig. 1, and upper and lower surface is processed with multiple tracks isocentric circular arc groove, two sides circular arc crest and trough 1/2 tooth pitch that staggers, and the ripple tooth pitch is consistent. Pad skeleton inner radius downside end groove is the V-shaped groove of one 90 degree, and the V-shaped groove left side is a plane, and plane place's thickness and skeleton gross thickness have thickness difference, and it is a little R circular arc that there are a triangular shape groove, bottom land end in the V-shaped groove left side.

That metallic framework is coated glue special in Fig. 2, compound dimension soft graphite, most of graphite is depressed in the skeleton grooves after the compacting.

Be that the utility model is installed on the male and female flange in Fig. 3, behind the tools for bolts ' pretension, the crest of pad circular arc contacts with flange sealing surface up and down, produces plastic deformation, forms a plurality of line contact sealings with pressure reduction space, sets up initial sealing. After boosting, because the pressure medium effect, pad and flange sealing surface gap location are full of pressure, and pressure makes the inboard place of pad gap location upper surface spike and below V-shaped groove spike be adjacent to flange sealing surface, and pressure increases, and it is more tight to fit, thereby reaches local self-packing effect

Embodiment:

1.V type wave tooth composite gasket skeleton processing technology:

A. round cutting-off tool cuts off at the outside dimension place on request beyond the elder generation.

B presses designing requirement car rounding from outside to inside curve bath with the circular arc lathe tool.

C workpiece reverse side is reinstalled the back by size requirement car rounding from outside to inside curve bath, car system one V-shaped groove endways, then with the depth of cut of (t-1.2) toward internal diameter direction car system plane, up to the product inner radius.

D changes special-purpose angle cutter and ticks the triangular shape groove in the V-shaped groove left side.

E cuts out internal diameter with interior dise knife by product requirement.

2.V the use of type corrugated serrated compound gasket or installation:

Should check the flange situation that pad is installed before a installs comprehensively, and guarantee that flange surface is smooth smooth, injury-free, two flange medial axis are centering substantially, and flanged surface is parallel to each other.

B places flange surface with product, should gradually attachment bolt be tightened several times during installation, and pretightening force that tights a bolt and order should be by relevant regulations, and symmetry is tightened.

Claims

1. V-type corrugated serrated compound gasket, upper and lower surface is processed with multiple tracks isocentric circular arc groove, it is characterized in that: end, pad skeleton inner radius one side groove is a V-shaped groove, and the V-shaped groove side is a plane, this plane place's thickness and skeleton total thickness have thickness difference.

2. V-type corrugated serrated compound gasket according to claim 1 is characterized in that: it is a little circular arc that there are a triangular shape groove, the bottom of groove in the V-shaped groove left side.