CN202392325U

CN202392325U - Sealing gasket used for sealing flange face

Info

Publication number: CN202392325U
Application number: CN201120534011XU
Authority: CN
Inventors: 侯敏; 毛华平; 马志刚
Original assignee: Suzhou Baohua Mechanical Technology Co Ltd
Current assignee: Suzhou Bao Hua sealing Polytron Technologies Inc
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2012-08-22
Anticipated expiration: 2021-12-20

Abstract

The utility model relates to a sealing gasket used for sealing a flange face. The sealing gasket comprises a metal inner ring, a metal outer ring and a non-metal sealing ring inlaid between the metal inner ring and the metal outer ring, wherein the axial thickness of the metal inner ring is less than the axial thickness of the non-metal sealing ring, and the axial thickness of the metal outer ring is less than or equal to the axial thickness of the non-metal sealing ring. When the sealing gasket disclosed by the utility model is mounted, sealing is mainly realized by virtue of surface contact between the non-metal sealing ring and a flange; when pressure of a sealing medium is increased, the metal inner ring can produce radial expansion under stress and compresses the non-metal sealing ring, thus improving sealing specific pressure of the non-metal sealing ring and the flange face and achieving better sealing property; and when pressure of the sealing medium is reduced, the metal inner ring contracts, and the sealing specific pressure is returned. Thus, the sealing gasket disclosed by the utility model has higher resistance to pressure fluctuation and temperature fluctuation and better sealing flexibility, and phenomena of strain fatigue and creep relaxation can hardly be caused.

Description

The gasket seal that is used for the flanged surface sealing

Technical field

The utility model relates to a kind of gasket seal that is used for the flanged surface sealing

Background technique

In the existing technology; The gasket seal that the flanged surface sealing is used generally all is SW with outside ring or non-metallic flat gasket; The two all is to rely on bolt between the flange to lock the necessary seal pressure of pad is provided; Therefore these two kinds of pads are not strong to the defensive ability/resistance ability of pressure and temperature fluctuation, occur phenomenons such as strain fatigue and creep relaxation easily, sealing effect descended or inefficacy

Summary of the invention

the utility model technical problem to be solved is the deficiency that overcomes existing technology, and the gasket seal that a kind of resisting temperature, pressure surge ability are strong, sealability better is used for the flanged surface sealing is provided.

For solving above technical problem, the utility model is taked following technological scheme:

a kind of gasket seal that is used for the flanged surface sealing; Comprise ring in the metal, be around in the metal outer shroud of ring periphery in the said metal and be embedded the nonmetal seal ring between the ring and said metal outer shroud in said metal; According to the utility model; The axial thickness of the axial thickness＜said nonmetal seal ring of ring in the said metal, the axial thickness of the axial thickness of said metal outer shroud≤said nonmetal seal ring.

preferably, the axial thickness of the axial thickness＜said metal outer shroud of ring in the said metal.

preferably, the top of said metal outer shroud and/or bottom are forming step near a side of nonmetal seal ring.The shape of step is provided with specifically and can decides according to the shape of the groove on the flange, so that step can fit to good with cell wall.

preferably, the radial section of ring is square in the said metal.

preferably, the material of ring and said metal outer shroud is selected from a kind of in carbon steel, stainless steel, copper, aluminium, monel metal, the severe nickel of English and the titanium in the said metal.

preferably, the material of said nonmetal seal ring is selected from a kind of in graphite, mica and the teflon.

Because the enforcement of above technological scheme, the utility model compared with prior art has following advantage:

the utility model gasket seal is designed to the axial thickness that encircles in the metal littler than the axial thickness of nonmetal seal ring, and when installing, gasket seal mainly relies on nonmetal seal ring to contact with face between the flange and realizes sealing; With the pressure or the increase in temperature of the medium that gasket seal sealed, the ring pressurized produces radial dilatation and pushes nonmetal seal ring in the metal, thereby can improve the seal pressure of nonmetal seal ring and flanged surface, makes better tightness; Pressure or temperature with sealing medium reduce, and ring produces radial contraction in the metal, and the flanged surface seal pressure descends thereupon, is returned to original state.Therefore the utility model gasket seal has the self-tightening effect, can regulate seal pressure according to pressure or temperature variation, and is better to the resistivity flexibility stronger, sealing of pressure and temperature fluctuation, is not easy to take place the phenomenon of strain fatigue and creep relaxation.

Description of drawings

Below in conjunction with accompanying drawing and concrete mode of execution the utility model is done further detailed explanation:

Fig. 1 is the plan view of the utility model gasket seal;

Fig. 2 is the radial cross-section of embodiment 1 gasket seal;

Fig. 3 is the installation form schematic representation of embodiment 1 gasket seal;

Fig. 4 is the enlarged view at A position among Fig. 3;

Fig. 5 is the radial cross-section of embodiment 2 gasket seal;

Fig. 6 is the installation form schematic representation of embodiment 2 gasket seal;

Fig. 7 is the enlarged view at B position among Fig. 6;

wherein: 1, ring in the metal; 2, nonmetal seal ring; 3, metal outer shroud; 30, step; 4, flange.

Embodiment

are done further detailed explanation below in conjunction with concrete embodiment to the utility model, but are not limited to these embodiments.

Embodiment 1

referring to Fig. 1 to Fig. 4, according to the gasket seal of present embodiment by encircle 1 in the metal, metal outer shroud 3 and be embedded that the nonmetal seal ring 2 between the ring 1 and metal outer shroud 3 constitutes in metal.Wherein ring 1 selects for use the same metal of material to be made with metal outer shroud 3 in the metal; Available material has carbon steel, stainless steel, copper, aluminium, monel metal, the severe nickel of English and titanium etc., and the material of nonmetal seal ring 2 can be graphite, mica or teflon.When making the present embodiment gasket seal, nonmetal seal ring 2 can be in many ways (as knock etc.) embeds in the metal between the ring 1 and metal outer shroud 3, make encircle in nonmetal seal ring 2 and the metal 1 and metal outer shroud 3 between close proximity or offset.The axial thickness of the axial thickness＜nonmetal seal ring 2 of the axial thickness＜metal outer shroud 3 of ring 1 in the metal, the radial section of ring 1 is square in the metal, and the top of metal outer shroud 3 or bottom form step 30 in the side near nonmetal seal ring 2.The sealing pad is fit to be installed between two flanges 4, and the shape of step 30 can design according to the groove of flange facing, so that step 30 can be stuck in the groove, fits with cell wall and bottom land or press close to, improves the stability of fixing seal pad.

When present embodiment gasket seal is installed; Lock through flange; Nonmetal seal ring 2 is compressed; To almost in the same plane with metal outer shroud 3, and ring 1 mainly plays the effect of supporting nonmetal seal ring 2 in the metal, and gasket seal mainly relies on nonmetal seal ring 2 and metal outer shroud 3 to contact with face between the flange 4 and realizes sealing; With the pressure or the increase in temperature of the medium that gasket seal sealed, ring 1 pressurized produces radial dilatation and pushes nonmetal seal ring 2 in the metal, has improved the seal pressure of nonmetal seal ring 2 and flanged surface, makes better tightness; And reduce with the pressure or the temperature of sealing medium, ring 1 produces radial contraction in the metal, and the flanged surface seal pressure descends thereupon, is returned to original state again.Therefore make the present embodiment gasket seal have the self-tightening effect, can regulate seal pressure according to pressure or temperature variation, better to the resistivity flexibility stronger, sealing of pressure and temperature fluctuation, be not easy to take place the phenomenon of strain fatigue and creep relaxation.

Embodiment 2

Gasket seal of present embodiment and embodiment 1 gasket seal structure material homogeneous phase are together; Difference is: the upper and lower of the metal outer shroud 3 of present embodiment gasket seal all forms step 30 in the side near nonmetal seal ring 2; This is to be provided with according to the situation that two flanged surfaces up and down all have groove; Make step 30 can be stuck in the groove of two flanged surfaces like this, no matter be when installing or when variation in pressure, can both improve gasket seal fixation stability property.

More than the utility model has been done detailed description; Its purpose is to let the personage that is familiar with this art can understand the content of the utility model and implements; Can not limit the protection domain of the utility model with this; All equivalences of doing according to the spirit of the utility model change or modify, and all should be encompassed in the protection domain of the utility model

Claims

1. one kind is used for the gasket seal that flanged surface seals; Comprise ring (1) in the metal, be around in the metal outer shroud (3) of ring (1) periphery in the said metal and be embedded the nonmetal seal ring (2) that in said metal, encircles between (1) and the said metal outer shroud (3); It is characterized in that: the axial thickness of the axial thickness＜said nonmetal seal ring (2) of ring (1) in the said metal, the axial thickness of the axial thickness of said metal outer shroud (3)≤said nonmetal seal ring (2).

2. gasket seal according to claim 1 is characterized in that: the axial thickness of the axial thickness＜said metal outer shroud (3) of ring (1) in the said metal.

3. gasket seal according to claim 1 is characterized in that: the top of said metal outer shroud (3) and/or bottom form step (30) in the side near said nonmetal seal ring (2).

4. gasket seal according to claim 1 is characterized in that: the radial section of ring (1) is square in the said metal.

5. gasket seal according to claim 1 is characterized in that: the material of ring (1) and said metal outer shroud (3) is selected from a kind of in carbon steel, stainless steel, copper, aluminium, monel metal, the severe nickel of English and the titanium in the said metal.

6. gasket seal according to claim 1 is characterized in that: the material of said nonmetal seal ring (2) is selected from a kind of in graphite, mica and the teflon.