CN214698739U

CN214698739U - High-sealing-performance non-metal sealing gasket

Info

Publication number: CN214698739U
Application number: CN202023164301.8U
Authority: CN
Inventors: 孙利杰
Original assignee: Zhejiang Cps Cathay Packing & Sealing Co ltd
Current assignee: Zhejiang Cps Cathay Packing & Sealing Co ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2021-11-12
Anticipated expiration: 2030-12-24

Abstract

The utility model discloses a high sealing performance non-metallic seal gasket, gasket main part including the non-metallic sealing material is made, gasket main part's surface is equipped with the protruding structure of the rectangular shape that is formed by the one-way boundless concatenation of a plurality of protruding units that are parallelogram shape, protruding unit by the protruding sand grip that forms of surface of gasket main part encloses to close and forms, protruding unit includes a pair of connection opposite side and a pair of separation opposite side, protruding structure includes two long limits that are parallel to each other that are formed by the connection opposite side correspondence of a plurality of protruding units of the aforesaid, and the separation opposite side of a plurality of protruding units of the aforesaid is two form a plurality of separation limits that are parallel to each other between the long limit, and is a plurality of protruding structure is densely covered the surface of gasket main part. The utility model has the advantages that: the gasket has the characteristics of good performance of bearing compression stress, excellent surface performance, good sealing performance and the like.

Description

High-sealing-performance non-metal sealing gasket

Technical Field

The utility model belongs to the technical field of sealing material and structure technique and specifically relates to a nonmetal seal gasket of high leakproofness ability is related to.

Background

The gasket sealing is that under the action of bolt pretension load, pressure is applied to the flange sealing surface to promote the gasket between the two flange surfaces to generate elastic deformation or plastic deformation, so that the surface of the gasket can be filled with the rugged microgeometric gap on the flange sealing surface, and further the sealing of the flange surfaces is realized. The leakage of the bolt flange joint mainly has two ways, namely, the leakage of a contact surface, and the failure is expressed as the leakage of a sealing medium along the interface of a gap between a gasket and a flange sealing surface; secondly, leakage from the interior of the material, due to insufficient pressing force, creates leakage paths within the gasket. Therefore, the quality of the sealing surface of the gasket affects the sealing ability of the gasket, and especially when the sealing surface of the flange is uneven and has defects, the adaptability of the gasket to the unevenness and the defects is particularly important. Although the risk of flange leakage can be greatly reduced by improving the bolt pre-tightening load, if the compression stress of the gasket is too large, the gasket is easy to generate elastic-plastic deformation to cause rapid thickness reduction, and the gasket can also be disintegrated and cracked, so that the resilience performance is lost.

For example, chinese patent application No. CN200610053369.4, published 2009, 04, 29, entitled "a method for producing a polytetrafluoroethylene composite elastomer gasket and a product thereof" discloses a process for producing a polytetrafluoroethylene composite elastomer gasket and a product thereof. The gasket is mainly made of single polytetrafluoroethylene, and has poor elasticity and strength; rubber is added, and the two materials are not bonded together, so that the whole using effect is not enough to meet the problems of higher pressure and harsh working conditions; the technical problems that the surface of the gasket is a smooth surface, the sealing performance is poor and the like are also solved. According to the invention, the polytetrafluoroethylene gasket is machined by machine tool cutting to form an upward convex waterline, and the waterline is tightly attached to the sealing surface of the flange after the flange bolt is pre-tightened due to the existence of the waterline, however, if the compression stress of the gasket is too large, the gasket is easy to generate elastic-plastic deformation to cause rapid thickness reduction in the practical use process of the non-metallic gasket, and the gasket can also be disintegrated and cracked, so that the resilience performance is lost.

Disclosure of Invention

The utility model discloses an it is too big to overcome gasket compressive stress among the prior art, and the gasket easily takes place elastoplastic deformation and arouses thickness attenuate rapidly, and it is cracked also to break down probably to appear to lose the not enough of resilience ability, provide a high sealing performance non-metal seal gasket, the performance of bearing compressive stress that has the gasket is good, and surface property is excellent, and has the characteristic of good leakproofness.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a high leakproofness can nonmetal seal gasket, includes the gasket main part that nonmetal sealing material made, the surface of gasket main part is equipped with the protruding structure of the rectangular shape that the one-way joint that is altogether of a plurality of protruding units that are parallelogram shape formed, protruding unit by the protruding sand grip that forms in surface of gasket main part encloses to close and forms, protruding unit includes a pair of connection opposite side and a pair of separation opposite side, protruding structure includes two long limits that are parallel to each other that are formed by the connection opposite side correspondence of a plurality of above-mentioned protruding units, and the separation opposite side of a plurality of above-mentioned protruding units is two form a plurality of separation limits that are parallel to each other between the long limit, and is a plurality of protruding structure is densely covered the surface of gasket main part.

Preferably, the blocking edges on two adjacent raised structures are aligned with each other, and all the raised units are arranged on the surface of the gasket main body in a grid shape.

Preferably, the blocking edges on two adjacently arranged raised structures are offset with respect to each other.

Preferably, the offset distance is half of the length of the connecting opposite sides of the protruding units.

Preferably, the two protruding structures respectively provided on the upper and lower surfaces of the gasket main body are disposed in a staggered manner.

Preferably, the gasket main body is made of polytetrafluoroethylene, flexible graphite or asbestos-free fiber.

Preferably, the shape of the gasket body is one of a circle, a racetrack shape, or an oval shape.

Preferably, the cross section of the convex strip is one of a semicircle, a circular arc or a trapezoid.

Preferably, the height of the convex strips is 0.2-0.8 mm.

The utility model provides a high sealing performance nonmetal sealing gasket, including the gasket main part that the nonmetal sealing material made, the surface of gasket main part is equipped with the protruding structure of rectangular shape that is formed by the one-way boundless concatenation of a plurality of protruding units that are parallelogram shape, protruding unit is enclosed by the sand grip that the surface arch of gasket main part formed and closes, protruding unit includes a pair of connection opposite side and a pair of separation opposite side, protruding structure includes two long sides that are parallel to each other that are formed by the connection opposite side correspondence connection of a plurality of above-mentioned protruding units, and the separation opposite side of a plurality of above-mentioned protruding units forms a plurality of separation limits that are parallel to each other between two long sides, and a plurality of protruding structure is densely covered on the surface of gasket main part, and preferred the cross section semicircle of sand grip is personally submitted 0.5mm, the protruding height preferred adoption of sand grip, the gasket designed in this way has better bearing capacity, can disperse pressure and reduce stress concentration caused by shape mutation. The convex units are in the shape of parallelogram, and when the convex units are circularly and tangentially paved on the surface of the sealing plate or paved in other shapes, a part of the convex units in the middle can not be fully paved, the convex units are troublesome to process and uneven in stress, and a leakage channel is easy to form. The blocking edges on the two adjacent convex structures are arranged in a staggered mode or the convex units are densely distributed in a grid mode, so that the convex units can be paved on a plane in an non-overlapping mode, and the sealing plate has good applicability to the integrally formed sealing plate. The parallelogram protruding units densely distributed in the latticed shape improve the compression and resilience performance, change the surface contact into line contact, reduce the contact area, make the gasket receive more concentrated flange stress when the initial compression, can effectively eliminate the insufficient influence of sealing contact, thereby improving the sealing performance and preventing the leakage. And on the other hand, because flange bolt's pretightning force increases, a small amount of sand grip can make stress too concentrate and lead to the gasket easily to take place elastoplastic deformation and arouse the rapid attenuate of thickness, it is cracked also to appear disassembling, thereby lose resilience performance, adopt latticed densely covered protruding unit or lie in the protruding structural separation limit mutual dislocation's of two adjacent arrangements the arrangement form, make when concentrating flange stress, the quantity of contact line has been increased, make the gasket can not lead to the gasket easily to take place elastoplastic deformation and arouse the rapid attenuate of thickness because stress is too concentrated, also can not appear disassembling cracked, thereby lose the condition of resilience performance.

The utility model has the advantages that: the gasket has the characteristics of good performance of bearing compression stress, excellent surface performance, good sealing performance and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of a convex structure of the present invention;

fig. 3 is a schematic cross-sectional view of the present invention;

fig. 4 is another embodiment of the present invention.

In the figure: gasket main part 1, protruding unit 2, connect opposite side 21, separation opposite side 22, protruding structure 3, long limit 31, separation limit 32, sand grip 4.

Detailed Description

To make the objects, technical solutions and advantages of embodiments of the present invention clearer, the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Example 1: as shown in fig. 1, a high sealing performance nonmetal sealing gasket, gasket main part 1 including nonmetal sealing material makes, the surface of gasket main part is equipped with the protruding structure 3 of the rectangular shape that is formed by the one-way joint of the boundry of a plurality of protruding units 2 that are parallelogram shape, protruding unit by the protruding sand grip 4 that forms in surface of gasket main part encloses to close and forms, protruding unit includes a pair of opposite side 21 and a pair of separation opposite side 22 of connecting, protruding structure includes two and corresponds the long limit 31 that is parallel to each other that forms by the connection opposite side of a plurality of above-mentioned protruding units, and the separation opposite side of a plurality of above-mentioned protruding units is two form a plurality of separation limits 32 that are parallel to each other between the long limit, and is a plurality of protruding structure densely covered is in the surface of gasket main part.

In this embodiment, lie in the mutual alignment of separation limit on two adjacent protruding structures of arranging, all protruding unit is latticed and arranges the surface of gasket main part, so design gasket has better bearing capacity, can disperse pressure, reduces the stress concentration because of the shape sudden change causes.

Furthermore, the two protruding structures respectively arranged on the upper surface and the lower surface of the gasket main body are arranged in a staggered mode.

Furthermore, the gasket main body is made of polytetrafluoroethylene or flexible graphite or asbestos-free fiber. In this embodiment, a gasket body made of polytetrafluoroethylene is used. Furthermore, the protruding structure and the gasket main body are molded or machined into a whole.

Further, the shape of the gasket body is one of a circle, a racetrack shape, or an oval shape. Circular, runway shape and ellipse are the common shape of the normal even sealed face, so design the gasket into one of circular, runway shape or ellipse, and in fact, the shape of gasket technical personnel can adjust by oneself according to the demand, and only should also belong to the protection scope of the utility model to the simple replacement of gasket shape, and adopt circularly in this embodiment.

Furthermore, the cross section of each convex strip is in one of a semicircular shape, an arc shape and a trapezoid shape. Semicircular, circular arc or trapezoidal are the cross sectional shape of the sand grip of the commonly used of seal gasket processing, and in fact, the cross sectional shape of sand grip technical personnel in the field can adjust by oneself according to the demand, and only carry out the simple replacement of not paying out creative work to sand grip cross sectional shape and should also belong to the utility model discloses a protection scope.

Furthermore, the height of the raised strips is 0.2-0.8 mm. In this embodiment a semicircular projection with a radius of 0.5mm is used.

The embodiment provides a high-sealing-performance non-metallic sealing gasket, which comprises a gasket main body made of a non-metallic sealing material, wherein a strip-shaped protruding structure formed by splicing a plurality of parallelogram-shaped protruding units in a one-way common way is arranged on the surface of the gasket main body, each protruding unit is formed by enclosing a raised line formed by the surface protrusion of the gasket main body, each protruding unit comprises a pair of connecting opposite sides and a pair of blocking opposite sides, each protruding structure comprises two mutually parallel long sides formed by correspondingly connecting the connecting opposite sides of the plurality of protruding units, the blocking opposite sides of the plurality of protruding units form a plurality of mutually parallel blocking sides between the two long sides, the plurality of protruding structures are densely distributed on the surface of the gasket main body, the cross section of the raised line is preferably semicircular, and the protruding height of the raised line is preferably 0.5mm, the gasket designed in this way has better bearing capacity, can disperse pressure and reduce stress concentration caused by shape mutation. The convex units are in the shape of parallelogram, and when the convex units are circularly and tangentially paved on the surface of the sealing plate or paved in other shapes, a part of the convex units in the middle can not be fully paved, the convex units are troublesome to process and uneven in stress, and a leakage channel is easy to form. The blocking edges on the two adjacent convex structures are arranged in a staggered mode or the convex units are densely distributed in a grid mode, so that the convex units can be paved on a plane in an non-overlapping mode, and the sealing plate has good applicability to the integrally formed sealing plate. The parallelogram protruding units densely distributed in the latticed shape improve the compression and resilience performance, change the surface contact into line contact, reduce the contact area, make the gasket receive more concentrated flange stress when the initial compression, can effectively eliminate the insufficient influence of sealing contact, thereby improving the sealing performance and preventing the leakage. And on the other hand, because flange bolt's pretightning force increases, a small amount of sand grip can make stress too concentrate and lead to the gasket easily to take place elastoplastic deformation and arouse the rapid attenuate of thickness, it is cracked also to appear disassembling, thereby lose resilience performance, adopt latticed densely covered protruding unit or lie in the protruding structural separation limit mutual dislocation's of two adjacent arrangements the arrangement form, make when concentrating flange stress, the quantity of contact line has been increased, make the gasket can not lead to the gasket easily to take place elastoplastic deformation and arouse the rapid attenuate of thickness because stress is too concentrated, also can not appear disassembling cracked, thereby lose the condition of resilience performance.

Example 2: the remainder of this example is the same as example 1, except that: the blocking edges on two adjacently arranged convex structures are staggered with each other.

Further, the dislocation distance is half of the length of the connecting opposite sides of the protruding units. In this embodiment, adopt the mutual dislocation's of two adjacent structural separation limits of protruding of arranging to arrange, make two adjacent structural separation limits of protruding can not the collineation, guarantee that on the one hand can be good can not form leakage channel, on the other hand makes the peak of separation limit misplace as far as possible, prevent the peak stress concentration and the conquassation of separation limit, even conquassation its leakproofness of only destroying two protruding units, and two adjacent structural separation limits of protruding collineation of limit can make the leakproofness of four relevant protruding units all destroyed, it forms the route of revealing to change.

Claims

1. The utility model provides a high leakproofness can nonmetal seal gasket, includes gasket main part (1) that nonmetal sealing material made, characterized by, the surface of gasket main part is equipped with protruding structure (3) of the rectangular shape that the one-way joint that shares the limit of protruding unit (2) that is the parallelogram shape by a plurality of, protruding unit by sand grip (4) that the surface arch of gasket main part formed enclose to close and form, protruding unit includes a pair of connection opposite side (21) and a pair of separation opposite side (22), protruding structure includes two long limits (31) that are parallel to each other that are formed by the connection opposite side correspondence of a plurality of above-mentioned protruding units, and the separation opposite side of a plurality of above-mentioned protruding units is two form a plurality of blocks limit (32) that are parallel to each other between the long limit, and is a plurality of protruding structure is densely covered the surface of gasket main part.

2. The high-sealing-performance non-metallic sealing gasket as recited in claim 1, wherein the barrier ribs (32) on two adjacent raised structures (3) are aligned with each other, and all the raised units (2) are arranged on the surface of the gasket body (1) in a grid shape.

3. The high-sealing-performance non-metallic sealing gasket as recited in claim 1, characterized in that the barrier ribs (32) on two adjacent raised structures (3) are offset from each other.

4. The high-sealability non-metal sealing gasket according to claim 3, wherein the offset distance is half of the length of the connecting opposite side (21) of the convex unit (2).

5. The high-sealing-performance nonmetal sealing gasket according to claim 1, wherein the two convex structures (3) respectively arranged on the upper and lower surfaces of the gasket main body (1) are arranged in a staggered manner.

6. The high-sealing-performance nonmetal sealing gasket according to claim 1, 2, 3 or 4, characterized in that the gasket main body (1) is made of polytetrafluoroethylene or flexible graphite or asbestos-free fiber.

7. The high-sealability non-metallic sealing gasket of claim 5 wherein the shape of the gasket body (1) is one of circular, racetrack or oval.

8. The high-sealability non-metallic sealing gasket of claim 2, wherein the cross section of the protruding strip (4) is one of a semicircle, a circular arc or a trapezoid.

9. The high-sealability non-metallic sealing gasket of claim 2 wherein the height of the raised strips (4) is 0.2-0.8 mm.