CN209762229U - graphite wound gasket with inner ring and outer ring and stable sealing performance - Google Patents

Abstract

The utility model relates to a graphite gasket, in particular to a graphite wound gasket with an inner ring and an outer ring with stable sealing performance, it includes the inner ring that cup joints in proper order from inside to outside, gasket body and outer loop, the gasket body is packed by graphite and the strap winding obtains, equal coaxial outer butt edge that is equipped with on the two ring faces of outer loop, lie in the outer loop with the outer butt of one side along the axle center evenly distributed around the outer loop, the outer butt that lies in the outer loop both sides sets up along the plane symmetry about perpendicular outer loop axle center, outer butt is along radially setting towards outer loop axle center or outside outer loop axle center along the outer loop, two outer butts flush with the ring-shaped terminal surface of the gasket body of its place one side respectively along the terminal surface of outside the outer loop, reduce the reduction of two annular terminal surfaces of gasket body pressure intensity and the inhomogeneous graphite wound gasket seal effect of direction, improve the actual sealed effect of graphite wound gasket.

Description

Graphite wound gasket with inner ring and outer ring and stable sealing performance

Technical Field

The utility model relates to a graphite gasket, in particular to graphite wound gasket of in-band outer loop that sealing performance is stable.

Background

The graphite wound gasket is one of the existing graphite gaskets, and the general graphite wound gasket is obtained by superposing a strip-shaped graphite filler and a technical belt, spirally winding the graphite wound gasket into a ring shape, and welding a metal belt at the tail end of the ring-shaped graphite wound gasket. In order to enhance the pressure resistance of the graphite wound gasket, the graphite filler is wound more tightly, and the following improvement is made on the graphite wound gasket.

As shown in fig. 1, the graphite wound gasket includes a gasket body 2, an inner ring 3, and an outer ring 1.

As shown in fig. 2, in which the gasket body 2 includes graphite packing 21 and metal strips 22, the graphite packing 21 and the metal strips 22 are alternately stacked and spirally wound in a ring shape, it is different from a general graphite wound gasket in that the radial sections of the graphite packing 21 and the metal strips 22 are both "<" or ">", so that the inner side of the gasket body 2 is recessed and the outer side of the gasket body 2 is protruded.

As shown in the attached drawing 1, the inner ring 3 and the outer ring 1 are respectively sleeved on the inner side and the outer side of the gasket body 2, the outer side surface of the inner ring 3 is embedded into the inner side of the gasket body, and the inner side surface of the outer ring 1 is attached to the outer side surface of the gasket body 2, so that the inner ring 3 and the outer ring 1 clamp and fix the inner side and the outer side of the gasket body 2, and further the strength of the graphite wound gasket is enhanced and the possibility of tight winding of graphite filler is improved.

the radial cross section of the gasket body 2 in the graphite winding type gasket is not rectangular, when the gasket body is installed, the two annular end faces of the gasket body 2 are uneven in pressure and direction, so that the end faces of the gasket body 2 are not tightly attached to the gasket body 2 due to uneven deformation, the sealing effect is reduced, the effect of the gasket design is not achieved, the gasket is repeatedly installed again for many times, but the debugging effect is still not good, and therefore the improvement is needed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a graphite wound gasket of in-band outer loop that sealing performance is stable reduces two annular terminal surfaces of gasket body and receives the reduction of the sealed effect of pressure magnitude and direction inequality to graphite wound gasket, improves the actual sealed effect of graphite wound gasket.

the above technical purpose of the present invention can be achieved by the following technical solutions:

The utility model provides a graphite wound gasket of in-band outer loop that sealing performance is stable, includes inner ring, gasket body and the outer loop that cup joints in proper order from inside to outside, the gasket body is obtained by graphite filler and strap winding, all coaxial outer butt edge that is equipped with on two ring faces of outer loop is located the outer loop is with one side outer butt along the axle center evenly distributed around the outer loop is located the outer loop both sides outer butt sets up along the plane symmetry about perpendicular outer loop axle center, outer butt is along setting up along the radial outer loop axle center of outer loop or outside outer loop axle center, two along the terminal surface of outside outer loop flushes rather than the annular end face of the gasket body of place one side respectively.

by adopting the technical scheme, when the graphite wound gasket with the inner ring and the outer ring is installed, the graphite wound gasket is pressed by the connecting parts on the two sides, wherein the outer abutting edge and the side surface of the gasket body on the same side where the outer abutting edge is located are abutted to the connecting parts at the same time, so that the two outer abutting edges position and support the outer ring in the installation process, the axle center of the outer ring is prevented from inclining, the gasket body is positioned in an auxiliary manner by the outer ring, and the untight attachment and the negative effects caused by the untight attachment due to the uneven deformation of the gasket body are relieved;

Furthermore, the two outer abutting edges are oppositely closed to deform along with the abutting of the connecting part, the pressure and the friction force between the outer ring and the connecting part are increased, the outer ring is positioned to block the outer ring from sliding, the gasket body is positioned in an auxiliary mode through the outer ring, and the radial deformation of the gasket body and the negative influence caused by the radial deformation are relieved;

therefore, the reduction of the sealing effect of the graphite wound gasket caused by uneven pressure and direction on the two annular end surfaces of the gasket body is reduced, and the actual sealing effect of the graphite wound gasket is improved.

The utility model discloses further set up to: the outer abutting edge is arranged along the radial direction of the outer ring and back to the axis of the outer ring.

Through adopting above-mentioned technical scheme, outer butt gives the outer loop towards the power of axle center along the pressurized time, and it is in order to fix a position outer loop axle center position to outwards expand the trend of deformation when slowing down the outer loop pressurized, improve the inboard and gasket body laminating degree of outer loop and assistance-localization real-time's effect.

The utility model discloses further set up to: the outer abutting edge is annular.

Through adopting above-mentioned technical scheme, improve the bearing capacity and the location effect on outer butt edge, reduce the processing degree of difficulty on outer butt edge simultaneously, the graphite wound gasket processing production of being convenient for.

The utility model discloses further set up to: the outer abutting edge is coaxially connected to the outer edge of the outer ring.

Through adopting above-mentioned technical scheme, avoid outer butt to form the dead angle space between the annular terminal surface along the outside and outer loop, avoid gathering dust etc. in the dead angle space and hindering outer butt along the compressive deformation, reduce the processing difficulty on outer butt edge simultaneously, the processing production of the graphite wound gasket of being convenient for.

The utility model discloses further set up to: the outer butt is provided with a deforming ring groove coaxially along the end face back to one side of the outer ring.

through adopting above-mentioned technical scheme, when outer butt was followed with adapting unit butt, the deformation annular takes place to expand and warp, and then makes outer butt strengthen along the surface that is located deformation annular groove notch both sides and adapting unit butt face leakproofness, hinders that external dust and liquid get into the butt intra-annular, reduces that the gasket body receives external dust, liquid corrosion damage, prolongs the life of graphite wound form gasket.

The utility model discloses further set up to: the inner ring is characterized in that inner abutting ring edges are arranged on two annular side faces of the inner ring, the inner abutting ring edges are symmetrically arranged on a plane perpendicular to the axis of the inner ring, the inner abutting ring edges are obliquely arranged towards the axis of the inner ring or back to the axis of the inner ring, and the height of each inner abutting ring edge is equal to that of each outer abutting ring edge.

Through adopting above-mentioned technical scheme, interior butt ring is along when graphite wound gasket is installed, interior butt ring is along epoxy and outer butt along similar, interior butt ring is along butt adapting unit rather than the place with the gasket body side of one side simultaneously, support and fix a position the inner ring axle center, interior butt ring is along compressing tightly along with adapting unit simultaneously, it is along compressive deformation that it is interior butt ring, increase pressure and frictional force between inner ring and the adapting unit, fix a position the inner ring, hinder the inner ring to slide, further carry out assistance-localization real-time by the inner ring to the gasket body from this, reduce when the installation the reduction of the sealed effect of two annular terminal surfaces of gasket body pressure intensity and the uneven direction to graphite wound gasket, improve the actual sealed effect of graphite wound gasket.

The utility model discloses further set up to: the outer butt is along radially setting up to outer ring axle center dorsad along the outer loop, interior butt ring is along setting up towards inner ring axle center slope.

Through adopting above-mentioned technical scheme, outer butt is along following the opposite direction of slope with interior butt ring, and outer butt is along following when the pressurized deformation with interior butt ring, and outer butt is along giving the inside power of outer loop, slows down the trend of the outside expansion of outer loop pressurized, and interior butt ring is along giving the outside power of inner loop, slows down the trend that the inner loop received along inside shrink deformation, improves the inboard and interior ring outside of outer loop to gasket body laminating degree, improves outer loop and inner loop assistance-localization real-time's effect.

The utility model discloses further set up to: and the edge of one side of the inner abutting ring back to the inner ring is provided with a ventilating notch.

Through adopting above-mentioned technical scheme, the interior butt ring of being convenient for is along the gaseous discharge in the space between inboard and the gasket body, and the interior butt ring of being convenient for is along compressive deformation.

The utility model discloses further set up to: the ventilation notch is arc-shaped or semicircular.

Through adopting above-mentioned technical scheme, improve the deformability of ventilative breach, avoid ventilative breach deflection to exceed can the deformation limit and lead to interior butt ring along the fracture.

To sum up, the utility model discloses following beneficial effect has:

1. The outer abutting edge and the side face of the gasket body on the same side where the outer abutting edge is located are abutted against the connecting component at the same time, the outer ring is positioned and supported in the installation process, and the axle center of the outer ring is prevented from inclining; along with the abutting of the connecting part, the two outer abutting edges are oppositely drawn together to deform, the pressure and the friction force between the outer ring and the connecting part are increased, the outer ring is positioned to block the sliding of the outer ring, and then the gasket body is positioned in an auxiliary manner by the outer ring, so that the untight attaching and radial deformation caused by the nonuniform deformation of the gasket body are reduced, the reduction of the sealing effect of the graphite wound gasket is reduced, and the actual sealing effect of the graphite wound gasket is improved;

2. The two annular side surfaces of the inner ring are respectively provided with an inner abutting ring edge, the inner abutting ring edge is similar to the outer abutting edge in epoxy, the inner abutting ring edge and the side surface of the gasket body on the same side where the inner abutting ring edge is located are abutted to the connecting part at the same time, the axis of the inner ring is supported and positioned, and simultaneously the inner abutting ring edge is pressed and deformed along with the connecting part, so that the pressure and the friction force between the inner ring and the connecting part are increased, the inner ring is prevented from sliding, the gasket body is further positioned in an auxiliary mode through the inner ring, and the actual sealing effect of the graphite wound;

3. The outer abutting edge is arranged along the radial direction of the outer ring and back to the axis of the outer ring, the inner abutting edge is arranged along the axis of the inner ring in an inclined mode, when the outer abutting edge and the inner abutting edge deform along the pressed mode, the outer abutting edge gives inward force to the outer ring, the trend that the outer ring expands outwards when pressed is relieved, the inner abutting edge gives outward force to the inner ring, the trend that the inner ring deforms along the inward shrinkage is relieved, the attaching degree of the inner side of the outer ring and the outer side of the inner ring to the gasket body is improved, and the auxiliary positioning effect of the outer ring and the inner ring is improved;

4. the outer abutting edge is coaxially connected to the outer edge of the outer ring, so that a dead angle space is prevented from being formed between the outer side of the outer abutting edge and the annular end face of the outer ring, the phenomenon that the outer abutting edge is blocked from being deformed under pressure due to dust and the like accumulated in the dead angle space is avoided, the processing difficulty of the outer abutting edge is reduced, and the processing and the production of the graphite wound gasket are facilitated;

5. Outer butt sets up coaxial the deformation annular on the terminal surface of outer loop one side along dorsad, and the butt is along when with adapting unit butt, and the deformation annular takes place to expand and warp for outer butt is strengthened along the surface that is located deformation annular notch both sides and adapting unit butt face leakproofness, hinders that external dust and liquid get into in the butt annular, prolongs the life of graphite wound form gasket.

drawings

FIG. 1 is a cross-sectional view of a prior art graphite wound gasket;

FIG. 2 is an enlarged view of a portion of a conventional graphite wound gasket showing a gasket body structure at A;

FIG. 3 is a cross-sectional view of a first graphite wound gasket in accordance with the present application;

FIG. 4 is a second cross-sectional view of the graphite wound gasket of the present application;

FIG. 5 is an enlarged partial view of the outer abutment edge at B of FIG. 4;

FIG. 6 is an enlarged partial view of the inner abutment ring rim at C of FIG. 4;

FIG. 7 is a schematic view of a graphite wound gasket of the present application.

Reference numerals: 1. an outer ring; 11. a mating groove; 12. an outer abutment edge; 121. a deforming ring groove; 2. a gasket body; 21. graphite filler; 22. a metal strip; 2a, a boss; 2b, a recess; 3. an inner ring; 31. a plug-in part; 32. an inner abutment ring edge; 33. a ventilation notch; 4. and a connecting member.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in figure 3, the graphite wound gasket with the inner ring and the outer ring and stable sealing performance comprises an outer ring 1, a gasket body 2 and an inner ring 3.

As shown in fig. 4, the gasket body 2 is a prior art, and is formed by winding a graphite filler 21 and a metal band 22, wherein the outer side surface and the inner side surface of the gasket body 2 are both the metal band 22. The radial cross-sections of the graphite and the metal strip 22 in the gasket body 2 are both "<" or ">" in the same orientation, whereby the protrusions 2a are formed coaxially on the outer side surface of the gasket body 2, the protrusions 2a are protruded radially outward, the recesses 2b are formed coaxially on the inner side surface of the gasket body 2, and the recesses 2b are recessed radially outward.

As shown in fig. 4, the outer ring 1 is sleeved on the outer side of the gasket body 2, the inner side surface of the outer ring 1 is coaxially provided with a matching groove 11, the matching groove 11 is located at the middle position of the height of the outer ring 1, and the matching groove 11 is matched with the protruding portion 2 a. The protruding part 2a is inserted into the matching groove 11, and the protruding part 2a abuts against the matching groove 11, so that the protruding part 2a is clamped and fixed in the matching groove 11.

outer abutting edges 12 are further arranged on the outer edges of the two annular end faces of the outer ring 1, the outer abutting edges 12 are uniformly distributed around the axis of the outer ring 1, the shape of the outer abutting edges 12 can be determined according to actual conditions, the outer abutting edges can be a plurality of arc-shaped convex edges or an annular shape coaxial with the outer ring 1, and the outer abutting edges 12 are preferably annular. And the outer abutment edges 12 on both sides of the outer ring 1 are disposed symmetrically with respect to a plane perpendicular to the axial center of the outer ring 1.

Meanwhile, the outer abutting edge 12 is arranged along the radial direction of the outer ring 1 and inclines towards the axis of the outer ring 1 or back to the axis of the outer ring 1, and the outer abutting edge 12 is preferably arranged back to the axis of the outer ring 1 and inclines. The end surfaces of the two outer abutting edges 12 back to the outer ring 1 are flush with the annular end surface of the gasket body 2 on the side corresponding to the two outer abutting edges,

As shown in fig. 5, the two outer abutting edges 12 are further provided with a deforming ring groove 121 on the end surface facing away from the outer ring 1, the deforming ring groove 121 and the outer abutting edges 12 are coaxially arranged, and the cross-sectional shape of the deforming ring groove 121 can be determined according to actual conditions, and is here triangular.

as shown in fig. 4, the inner ring 3 is inserted into the inner side of the gasket body 2, and the outer side surface of the inner ring 3 is provided with an insertion portion 31 protruding outward along the radial direction of the inner ring 3. The mating part 31 is fitted into the recess 2b, and the mating part 31 is inserted into the recess 2b and is in contact with the recess 2 b.

The inner side edges of the two annular end surfaces of the inner ring 3 are also provided with inner abutting ring edges 32. The inner abutment ring 32 is coaxial with the inner ring 3 and is arranged obliquely along 32, preferably obliquely along 32 in the radial direction of the inner ring 3 towards the axis of the inner ring 3.

As shown in fig. 4 and fig. 6, the two inner abutting ring edges 32 are symmetrically arranged about a plane perpendicular to the axis of the inner ring 3, and meanwhile, the end surfaces of the two inner abutting ring edges 32, which face away from the outer ring 1, are flush with the annular end surface of the gasket body 2 on the side where the two inner abutting ring edges correspond to, and the end surfaces are further provided with air-permeable gaps 33.

The number of the air-permeable gaps 33 is plural, and the air-permeable gaps 33 are uniformly distributed around the axial center of the inner abutting ring edge 32. The shape of the ventilation notch 33 may be determined according to the actual situation, and is preferably an arc or a semicircle, where the ventilation notch 33 is a semicircle.

The utility model discloses a theory of operation:

Referring to fig. 7, when the graphite wound gasket with the inner ring and the outer ring is installed, the graphite wound gasket is pressed by the connecting parts 4 on the two sides, wherein the outer abutting edge 12 and the inner abutting edge 32 abut against the connecting parts 4 at the same side of the gasket body 2, so that the outer ring 1 and the inner ring 3 are positioned and supported in the installation process, the axis of the outer ring 1 and the axis of the inner ring 3 are prevented from inclining, the gasket body 2 is positioned by the outer ring 1 and the inner ring 3 in an auxiliary manner, and the untight attachment and the negative effects caused by the untight attachment due to the non-uniform deformation of the gasket body 2 are alleviated;

Furthermore, as the connecting component 4 is pressed, the two outer abutting edges 12 are closed to deform in opposite directions, the outer abutting edges 12 give a force to the outer ring 1 towards the axis so as to position the axis position of the outer ring 1 and slow down the tendency of outward expansion deformation when the outer ring 1 is pressed, the two inner abutting ring edges 32 are closed to deform in opposite directions, the inner abutting ring edges 32 give a force to the inner ring 3 away from the axis so as to position the axis position of the inner ring 3 and slow down the tendency of inward contraction deformation of the inner ring 3 along the inner edge, and the attaching degree of the inner side of the outer ring 1 and the outer side of the inner ring 3 to the gasket body 2 is improved;

Along with the deformation of the outer abutting edge 12 and the inner abutting ring edge 32, the pressure and the friction force between the outer ring 1 and the connecting part 4 and between the inner ring 3 and the connecting part 4 are increased, so that the outer ring 1 and the inner ring 3 are positioned, the sliding of the outer ring 1 and the inner ring 3 is prevented, the gasket body 2 is positioned in an auxiliary manner by the outer ring 1 and the inner ring 3, and the radial deformation of the gasket body 2 and the negative influence caused by the radial deformation are relieved;

Therefore, the reduction of the sealing effect of the graphite wound gasket caused by uneven pressure and direction on the two annular end surfaces of the gasket body 2 is reduced, and the actual sealing effect of the graphite wound gasket is improved.

when adapting unit 4 supported and pressed this application graphite wound gasket installation simultaneously, because of gasket body 2 and adapting unit 4 butt sealed, if interior butt ring edge 32 again with adapting unit 4 butt will form airtight space, airtight space hinders gasket body 2 uniform deformation to it is inseparable with adapting unit 4 laminating. The butt ring sets up ventilative breach 33 on edge 32 in this place, supplies in the gas outgoing in the space between butt ring edge 32 inboard and gasket body 2 in, and the butt ring is followed 32 pressurized deformations in being convenient for, and the trend of inwards sunken deformation is more obvious and even when making gasket body 2 pressurized simultaneously, improves the sealed effect improvement of this application graphite wound gasket reality.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims (9)

1. A graphite wound gasket with an inner ring and an outer ring with stable sealing performance comprises an inner ring (3), a gasket body (2) and an outer ring (1) which are sequentially sleeved from inside to outside, the gasket body (2) is obtained by winding graphite filler (21) and a metal belt (22), it is characterized in that outer abutting edges (12) are coaxially arranged on two annular surfaces of the outer ring (1), the outer abutting edges (12) positioned on the same side of the outer ring (1) are uniformly distributed around the axis of the outer ring (1), the outer abutting edges (12) positioned on two sides of the outer ring (1) are symmetrically arranged relative to a plane vertical to the axis of the outer ring (1), the outer butt is along (12) radially towards outer ring (1) axle center or set up in the outer ring (1) axle center of dorsad along outer ring (1), two the terminal surface of outer butt along (12) the outer ring (1) of dorsad flushes with the annular terminal surface of the gasket body (2) of its place one side respectively.

2. the graphite wound gasket with inner and outer rings with stable sealing performance as claimed in claim 1, wherein said outer abutment edge (12) is arranged along the radial direction of the outer ring (1) and away from the axial center of the outer ring (1).

3. the graphite wound gasket with inner and outer rings having stable sealing properties as claimed in claim 1, wherein said outer abutment rim (12) is ring-shaped.

4. A graphite wound gasket with inner and outer rings with stable sealing performance according to claim 3, characterized in that the outer abutment rim (12) is coaxially connected to the outer rim of the outer ring (1).

5. the graphite wound gasket with inner and outer rings with stable sealing performance as claimed in claim 3, wherein said outer abutting edge (12) is provided with a deformation ring groove (121) coaxially on the end surface of the side opposite to the side where the outer ring (1) is arranged.

6. The graphite wound gasket with inner and outer rings and stable sealing performance as claimed in claim 1, wherein inner abutting ring edges (32) are arranged on both annular side surfaces of the inner ring (3), the inner abutting ring edges (32) are symmetrically arranged with respect to a plane perpendicular to the axis of the inner ring (3), the inner abutting ring edges (32) are obliquely arranged towards the axis of the inner ring (3) or away from the axis of the inner ring (3), and the height of the inner abutting ring edges (32) is equal to that of the outer abutting edge (12).

7. The graphite wound gasket with inner and outer rings with stable sealing performance as claimed in claim 6, wherein said outer abutting edge (12) is set along the radial direction of the outer ring (1) away from the axial center of the outer ring (1), and said inner abutting edge (32) is set inclined towards the axial center of the inner ring (3).

8. The graphite wound gasket with inner and outer rings with stable sealing performance as claimed in claim 6, wherein the inner abutting ring edge (32) is provided with a ventilation notch (33) on the edge of the side opposite to the inner ring (3).

9. the graphite wound gasket with inner and outer rings having stable sealing performance as claimed in claim 8, wherein said gas permeation gaps (33) are arc-shaped or semicircular.