CN214331805U

CN214331805U - Combined sealing gasket suitable for various working conditions

Info

Publication number: CN214331805U
Application number: CN202023060409.2U
Authority: CN
Inventors: 王月; 迟祥; 沈结; 李国龙; 高文娟; 雷勇
Original assignee: China Chengda Engineering Co Ltd
Current assignee: China Chengda Engineering Co Ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-01
Anticipated expiration: 2030-12-17

Abstract

The utility model discloses a be applicable to combined seal gasket for multiple operating mode condition, combined seal gasket comprises inner ring, the sealed pad of deformable, metal pad and outer loop from interior to exterior in proper order, the thickness H2 that the sealed pad of deformable is greater than the thickness H1 of inner ring and the thickness H3 of metal pad, the thickness H3 of metal pad is greater than the thickness H4 of outer loop and the thickness H1 of inner ring. The utility model is suitable for an environment that operating temperature or pressure can fluctuate appears, under the same pretightning force condition, the gasket width is littleer, reducible bolt circle diameter makes the flange structure compacter, conveniently installs and maintains in compact space, and this combined seal gasket is suitable for low pressure and high-pressure operating mode simultaneously moreover, and its installation adaptability is strong.

Description

Combined sealing gasket suitable for various working conditions

Technical Field

The utility model belongs to the technical field of process industry equipment seal structure, in particular to be applicable to multiple operating mode condition with combined seal gasket.

Background

The process industry equipment itself and the piping between the equipment have fluid (gas or liquid) containment and sealing problems. If petrochemical, chemical and pharmaceutical installations cannot be sealed effectively, the leakage of toxic and harmful media caused by the escape, overflow, drip and leakage of working media will cause environmental pollution and unintended shutdown of the installation.

In order to save the floor area of the device, the arrangement of equipment and pipelines is as compact as possible, and the flange is inevitably arranged in a small space sometimes; meanwhile, some devices are harsh in conditions, and under severe high-temperature and high-pressure conditions, the working environment under working pressure and temperature fluctuation puts high requirements on the installation accessibility, reliability and maintainability of the sealing structure. At present, the gasket structure widely applied between the flanges mainly plays a role in supporting and positioning, cannot play a role in sealing, and meanwhile, the gasket has different specifications and cannot be adapted to various pressure grade working conditions for the flanges with the same size and different pressure grades.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: in order to solve the technical problems, the combined sealing gasket for sealing equipment or a piping system is provided in an environment with compact arrangement space, high temperature, high pressure, working temperature or pressure fluctuation in the process industry.

The technical scheme of the utility model is realized like this: the utility model provides a be applicable to combined seal gasket for multiple operating mode condition which characterized in that: the combined sealing gasket consists of an inner ring, a deformable sealing gasket, a metal pad and an outer ring from inside to outside in sequence, wherein the thickness H2 of the deformable sealing gasket is greater than the thickness H1 of the inner ring and the thickness H3 of the metal pad, and the thickness H3 of the metal pad is greater than the thickness H4 of the outer ring and the thickness H1 of the inner ring.

Be applicable to combined seal gasket for multiple operating mode condition, its thickness H4 of outer loop is the same with the thickness H1 of inner ring.

Be applicable to combined seal gasket for multiple operating mode condition, its thickness H1 of inner ring is unilateral less 0.6mm than the sealed thickness H2 that fills up of deformable, the sealed thickness H2 that fills up of deformable is than the unilateral 0.15mm that is high of thickness H3 of metal pad.

Be applicable to multiple operating mode condition with combined seal gasket, its the external diameter of outer loop is the same with the external diameter size of flange be provided with a plurality of logical grooves that are used for the bolt to pass on the outer loop.

Be applicable to combined seal gasket for multiple operating mode condition, its lead to groove for offering at outer ring edge portion and opening U type groove outwards, a plurality of axle centers that lead to the groove and use the outer loop are central evenly distributed.

Be applicable to multiple operating mode condition with combined seal gasket, its the sealed pad of flexible stacks by a plurality of graphite and constitutes, through tenon fourth of the twelve earthly branches structural connection between graphite and the inner ring and between graphite and the metal pad.

Be applicable to combined seal gasket for multiple operating mode condition, its graphite one side that is close to the inner ring is the concave surface structure, the inner ring be provided with the concave surface assorted convex surface structure of graphite, graphite one side that is close to the metal pad is the convex surface structure, the metal pad be provided with the convex surface assorted concave surface structure of graphite.

Be applicable to combined seal gasket for multiple operating mode condition, its compaction density is confirmed according to the contact pressure demand of compression resilience test and design to graphite, direction between the graphite layer is ">" shape, complies with the concave surface of inner ring's convex surface and metal pad.

The utility model is suitable for an environment that operating temperature or pressure can fluctuate appears, under the same pretightning force condition, the gasket width is littleer, reducible bolt circle diameter makes the flange structure compacter, conveniently installs and maintains in compact space, and this combined seal gasket is suitable for low pressure and high-pressure operating mode simultaneously moreover, and its installation adaptability is strong.

Drawings

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

Fig. 2 is a plan view of the present invention.

Fig. 3 is a sectional view a-a in fig. 2.

Fig. 4 is a schematic structural view of the deformable sealing gasket of the present invention.

The labels in the figure are: 1 is a bolt, 2 is a nut, 3 is a flange, 4 is a combined sealing gasket, 5 is a through groove, 6 is graphite, 7 is an outer ring, 8 is a metal gasket, 9 is a deformable sealing gasket, and 10 is an inner ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the indication of the position or the positional relationship is based on the position or the positional relationship shown in the drawings, or the position or the positional relationship that the utility model is usually placed when using, or the position or the positional relationship that the skilled person conventionally understands, or the position or the positional relationship that the utility model is usually placed when using, and is only for the convenience of describing the present invention and simplifying the description, but does not indicate or suggest that the indicated device or element must have a specific position, be constructed and operated in a specific position, and thus, cannot be understood as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases for a person of ordinary skill in the art; the drawings in the embodiments are provided to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

As shown in fig. 1, 2 and 3, the combined sealing gasket 4 is applied to a sealing structure type of a flange 3, a bolt 1 and a nut 2, and specifically comprises, from inside to outside, a metal inner ring 10, a deformable sealing gasket 9, a metal gasket 8 and a metal outer ring 7, wherein a thickness H2 of the deformable sealing gasket 9 is greater than a thickness H1 of the inner ring 10 and a thickness H3 of the metal gasket 8, a thickness H3 of the metal gasket 8 is greater than a thickness H4 of the outer ring 7 and a thickness H1 of the inner ring 10, and a thickness H4 of the outer ring 7 is the same as a thickness H1 of the inner ring 10; specifically, the thickness H1 of the inner ring 10 is 0.6mm less than the thickness H2 of the deformable gasket 9, and the thickness H2 of the deformable gasket 9 is 0.15mm greater than the thickness H3 of the metal gasket 8.

The outer ring 7 is provided with a plurality of through grooves 5 for the bolts 1 to pass through, the through grooves 5 are U-shaped grooves which are arranged on the edge portion of the outer ring 7 and have outward openings, and the plurality of through grooves 5 are uniformly distributed by taking the axis of the outer ring 7 as the center. In this embodiment, eight (a number determined by calculation) oblong slots are provided in the outer ring, and bolts are inserted through the oblong slots during connection.

The utility model discloses a combined seal gasket is applicable to operating temperature or the undulant environment can appear in pressure, and this structure includes the metal pad, can apply certain bolt additional pretightning force on the metal pad, through the sealed pad of bolt pretension compression deformable, when the sealed pad compression of deformable contacts flange and metal pad, the sealed pad of deformable is no longer compressed, and all the other additional pretightning forces are applyed on flange and metal pad contact surface. When the contact surface generates a separation trend (such as a bolt is loosened) due to load fluctuation in the equipment, the additional pretightening force applied to the contact surface of the outer ring and the flange can ensure that the pretightening force applied to the deformable sealing gasket is not changed.

The utility model discloses a combined seal gasket compares with current ordinary gasket structure, because the existence of metal gasket, has improved gasket intensity, under the same pretightning force condition, the gasket width is littleer than ordinary gasket, reducible bolt circle diameter makes the flange structure compacter, conveniently installs and maintains in compact space.

The utility model discloses a combined seal gasket is suitable for multiple operating mode: under the working condition of low pressure grade, the tightening force of the bolt is small, the deflection of the flange sealing surface is small, only the deformable sealing gasket is compressed, the metal pad part is not compressed, and the deformable sealing gasket part mainly provides sealing; when the working condition of high pressure level is adopted, the tightening force of the bolt is large, the deflection of the flange sealing surface is large, except the compression of the deformable sealing gasket part, the metal pad part starts to be compressed due to the fact that the deformable sealing gasket part deforms greatly, and the metal pad part plays a role in sealing.

As shown in fig. 4, the deformable sealing gasket 9 is formed by stacking a plurality of graphites 6, the graphites 6 and the inner ring 10 and the graphites 10 and the metal gasket 8 are connected through a mortise-tenon structure, so that a graphite body is effectively fixed, the phenomenon that the graphites 10 and the metal gasket 8 are blown out due to extrusion during working is prevented, one side of the graphites 6 close to the inner ring 10 is of a concave structure, the inner ring 10 is provided with a convex structure matched with the concave surface of the graphites 6, one side of the graphites 6 close to the metal gasket 8 is of a convex structure, the metal gasket 8 is provided with a concave structure matched with the convex surface of the graphites 6, the graphites 6 determine the compaction density according to the compression rebound test and the designed contact pressure requirement, the directions between the graphites 6 are in a shape of ">" and conform to the convex surface of the inner ring 10 and the concave surface of the metal gasket 8.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a be applicable to combined seal gasket for multiple operating mode condition which characterized in that: the combined sealing gasket (4) is sequentially composed of an inner ring (10), a deformable sealing gasket (9), a metal pad (8) and an outer ring (7) from inside to outside, the thickness H2 of the deformable sealing gasket (9) is larger than the thickness H1 of the inner ring (10) and the thickness H3 of the metal pad (8), and the thickness H3 of the metal pad (8) is larger than the thickness H4 of the outer ring (7) and the thickness H1 of the inner ring (10).

2. The combination type gasket seal applicable to various working conditions according to claim 1, wherein: the thickness H4 of the outer ring (7) is the same as the thickness H1 of the inner ring (10).

3. The combination type gasket seal applicable to various working conditions according to claim 2, wherein: the thickness H1 of the inner ring (10) is 0.6mm less than that of the H2 single edge of the deformable sealing gasket (9), and the thickness H2 of the deformable sealing gasket (9) is 0.15mm higher than that of the H3 single edge of the metal gasket (8).

4. The combination type gasket seal applicable to various working conditions according to claim 1, wherein: the outer diameter of the outer ring (7) is the same as the outer diameter of the flange (3), and a plurality of through grooves (5) for the bolts (1) to pass through are formed in the outer ring (7).

5. The combination type gasket seal applicable to various working conditions according to claim 4, wherein: the through grooves (5) are U-shaped grooves which are arranged on the edge portion of the outer ring (7) and have outward openings, and the through grooves (5) are uniformly distributed by taking the axis of the outer ring (7) as the center.

6. The combination type gasket seal applicable to various working conditions according to any one of claims 1 to 5, wherein: the deformable sealing gasket (9) is formed by stacking a plurality of graphites (6), and the graphites (6) are connected with the inner ring (10) and the graphites (6) are connected with the metal gasket (8) through mortise and tenon structures.

7. The combination type gasket seal suitable for various working conditions of claim 6, wherein: graphite (6) one side that is close to inner ring (10) is the concave surface structure, inner ring (10) be provided with the concave surface assorted convex surface structure of graphite (6), graphite (6) one side that is close to metal pad (8) is the convex surface structure, metal pad (8) be provided with the convex surface assorted concave surface structure of graphite (6).

8. The combination type gasket seal applicable to various working conditions according to claim 7, wherein: the graphite (6) determines the compaction density according to the compression rebound test and the designed contact pressure requirement, and the direction between the layers of the graphite (6) is in a shape of '>', and conforms to the convex surface of the inner ring (10) and the concave surface of the metal pad (8).