CN205956600U

CN205956600U - Gasket

Info

Publication number: CN205956600U
Application number: CN201620877136.5U
Authority: CN
Inventors: 张宇凡
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-12
Filing date: 2016-08-12
Publication date: 2017-02-15
Anticipated expiration: 2026-08-12

Abstract

The utility model discloses a gasket, include from the interior past first ring form that sets gradually outward, transition district, second ring form, the oblique top of first ring form is arranged in to the second ring form to the district connects through the transition, the district carries out the circular arc chamfering processing with the junction of first ring form, second ring form in the transition, the interval is equipped with a plurality of annular serrated groove on the upper surface of the lower surface of first ring form, second ring form, is equipped with graphite layer, rubber layer or plastic layer on serrated groove, first ring form, transition district, second ring form integrated into one piece. The utility model discloses have strong resilience force, can ensure the leakproofness of flange.

Description

A kind of pad

Technical field

This utility model is related to the field of sealing technology of pipe flange and in particular to a kind of pipe flange connection pad.

Background technology

Existing pipe flange connection pad is usually annular plain cushion, during use, the sealing surface compact annular of two flanges Pad, makes the medium in flange cannot flow to outside flange by the space between annular gasket and sealing surface.Existing air ring Piece there is problems that：When the pressure of flange interior media, temperature raise or fluctuate, higher pressure produces at the two ends of flange Raw pulling force, higher temperature makes bolt expanded by heating extend, because annular gasket there is no enough resiliences it is impossible to continue to keep with The fitting tightly of flange sealing surface, now, the medium in flange flows to flange by the space between annular gasket and sealing surface Outside, causes seal failure.And existing annular gasket needs larger pretightning force in pretension, and larger pretightning force can make Pad, bolt etc. are easier creep relaxation, easily lead to leak.

Utility model content

The purpose of this utility model is to provide one kind to have stronger resilience force, can ensure that the pad of flange seal.

This utility model be employed technical scheme comprise that：

A kind of pad, including from the interior first annular body setting gradually outward, transition region, the second annular solid；Second annular Body is placed in first annular body oblique upper, and is connected by transition region；Connection in transition region and first annular body, the second annular solid Place carries out circular arc chamfering process；

The serrate slot of multiple ring-types is provided with the lower surface, the upper surface of the second annular solid of first annular body（Serrate slot Space set, also can continuously be arranged）, graphite linings, rubber layer or plastic layer are provided with serrate slot；

Described first annular body, transition region, the second annular body by integral forming.

By such scheme, the depth of profile of described serrate slot is 0.1-0.2mm, preferably 0.1mm, both ensure that graphite The good connection of layer, rubber layer, plastic layer and pad, also ensures that the intensity of pad, thus improving the service life of pad.

By such scheme, described graphite linings, rubber layer, the upper surface 0.1-0.4mm higher than the crown of serrate slot of plastic layer, Be preferably 0.3mm, this structure ensures that the rebound performance of pad it is ensured that flange connect sealing.

By such scheme, the packing layer such as described graphite linings, rubber layer, plastic layer has multiple, is disposed on serrate slot, This structure makes pad form Multi-level sealing structure when using with end face of flange, effectively enhances the sealing of bolted flange joints Effectiveness；When wherein one or more packing layers be destroyed lost efficacy when, can other be not provided with the serrate slot of packing layer Setting packing layer, thus improve the service life of pad.

By such scheme, first annular body is 120-170 ° with the angle of transition region, the folder of transition region and the second annular solid Angle is 120-170 °.

By such scheme, described transition region is smooth surface, to avoid stress concentration.

By such scheme, described first annular body, transition region, the second annular solid are made using metal material, certainly also may be used Made using other materials.

The beneficial effects of the utility model are：

Make first annular body, transition region, the second annular body by integral forming it is ensured that pad intensity, make pad more robust；

First annular body, the second annular solid set serrate slot, then graphite linings, rubber layer, plastic layer are set on serrate slot Deng packing layer, graphite linings, rubber layer, plastic layer can be made firmly to contact with first annular body, the second annular solid, difficult for drop-off, Ensure that the sealing that flange connects；

On first annular body, the second annular solid, the packing layer such as setting graphite linings, rubber layer, plastic layer can make pad have Good rebound performance, in pretension, required pretightning force is less, can reduce the creep of pad, bolt, and then improves spiral shell Bolt, the service life of flange；

The serrate slot of multiple ring-types is interval with the lower surface, the upper surface of the second annular solid of first annular body, both Can ensure that gasket strength, can ensure that first annular body, the contact with packing layer for second annular solid are good again；

Carry out circular arc chamfering process in the junction of transition region and first annular body, the second annular solid, to avoid because not connecting Continuous structure and the stress concentration that leads to, improve the service life of pad；

Only on the lower surface, the upper surface of the second annular solid of first annular body, setting serrate slot and packing layer, decrease Processing technology, also reduces cost.

Brief description

Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：

Fig. 1 is the cross-sectional view of this utility model pad；

Fig. 2 is the enlarged drawing of A in figure 1；

Fig. 3 is the overlooking the structure diagram of this utility model pad；

Fig. 4 is the present invention looks up structural representation of this utility model pad.

Wherein：1st, first annular body, 2, transition region, the 3, second annular solid, 4, serrate slot, 5, graphite linings.

Specific embodiment

In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only in order to explain this Utility model, is not used to limit this utility model.

Referring to Fig. 1-Fig. 4, a kind of pad, including from the interior first annular body 1 setting gradually outward, transition region 2, the second ring Body 3；Second annular solid 3 is placed in above first annular body oblique 1, and is connected by transition region 2；Transition region 2 with first annular Body 1, the junction of the second annular solid 3 carry out circular arc chamfering process；

The serrate slot 4 of multiple ring-types is interval with the lower surface, the upper surface of the second annular solid 3 of first annular body 1, The graphite linings 5 of flexibility are provided with serrate slot 4, certainly also can set other packing layers, such as rubber layer, plastic layer, as long as can be really Protect pad and there is good rebound performance just；

First annular body 1, transition region 2, the second annular solid 3 are integrally formed, to guarantee the intensity of whole pad.

In order to ensure packing layer（Graphite linings 5）With shim body（First annular body 1, the second annular solid 3）Well connect Connect, also ensure that the intensity of pad, improve the service life of pad, the depth of profile h of serrate slot can be designed as 0.1mm.In order to Ensure that the sealing that the rebound performance of pad and flange connect, packing layer can be made（Graphite linings 5）Upper surface and serrate slot 4 Difference in height h2=0.3mm of crown.Certainly, this pad could be used that other height, as long as can guarantee that gasket strength and pad resilience Property.

In this utility model, the packing layer such as described graphite linings, rubber layer, plastic layer has multiple, is disposed on serrate slot On, this structure makes pad form Multi-level sealing structure when using with end face of flange, effectively enhances bolted flange joints Sealing effectiveness；And when wherein one or more packing layers are destroyed and lost efficacy, the profile of tooth of packing layer can be not provided with other On groove, new packing layer is being set, thus improving the service life of pad.

In this utility model, first annular body is 120-170 ° with the angle of transition region, preferably 165 °；Transition region and the The angle of bicyclo- body is 120-170 °, preferably 165 °；And described transition region is smooth surface, to avoid because of discontinuous construction And the stress concentration leading to.

In this utility model, described first annular body, transition region, the second annular solid are made using metal material, certainly Can be made using other materials.

In this utility model, the upper surface of first annular body, the lower surface of first annular body, the upper table of the second annular solid Face, the second annular solid lower surface parallel, and first annular body and the second annular solid be arranged concentrically.

During use, first flange is in close contact with the lower surface of first annular body, and second flange is upper with the second annular solid Intimate surface contact.

This pad has better rebound performance compared with traditional pad, can preferably offset because of bolt pretightening The excessive flange deflection causing, thus avoid the leakage failure that pad outer leads to because of conquassation；The flexible filler layer of pad There is preferable rebound performance and sealing, the effectiveness sealing can be ensured for a long time, can apply to high temperature, high pressure, vibrations etc. Complex working condition.

It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted, And all these modifications and variations all should belong to the protection domain of this utility model claims.

Claims

1. a kind of pad it is characterised in that：Including from the interior first annular body setting gradually outward, transition region, the second annular solid； Second annular solid is placed in first annular body oblique upper, and is connected by transition region；In transition region and first annular body, the second annular The junction of body carries out circular arc chamfering process；

The serrate slot of multiple ring-types is interval with the lower surface, the upper surface of the second annular solid of first annular body, in profile of tooth Groove is provided with graphite linings, rubber layer or plastic layer；

2. pad according to claim 1 it is characterised in that：The depth of profile of described serrate slot is 0.1-0.2mm.

3. pad according to claim 1 and 2 it is characterised in that：Described graphite linings, rubber layer, the upper surface of plastic layer 0.1-0.4mm higher than the crown of serrate slot.

4. pad according to claim 3 it is characterised in that：Described graphite linings, rubber layer, plastic layer are disposed on tooth On shape groove.

5. pad according to claim 1 it is characterised in that：First annular body is 120-170 ° with the angle of transition region, Transition region is 120-170 ° with the angle of the second annular solid.