CN209743574U

CN209743574U - Wave tooth composite gasket

Info

Publication number: CN209743574U
Application number: CN201920134784.5U
Authority: CN
Inventors: 龚立新; 龚晓雪; 罗中艳
Original assignee: Yichang Hengsheng Sealing Material Co Ltd
Current assignee: Yichang Hengsheng Sealing Material Co Ltd
Priority date: 2019-01-26
Filing date: 2019-01-26
Publication date: 2019-12-06
Anticipated expiration: 2029-01-26

Abstract

the utility model discloses a ripples tooth composite pad piece belongs to seal gasket technical field. The flexible metal framework comprises a first annular metal framework, wherein wave teeth which are concentric with the first annular metal framework are arranged on the upper side and the lower side of the first annular metal framework, and a flexible non-metal layer is further arranged on the surfaces of the wave teeth; an outer ring is arranged on the outer circumference of the annular metal framework, and an inner ring is arranged on the inner circumference; the outer ring is distributed with a plurality of groups of positioning lugs, each group of positioning lugs is provided with a positioning hole, and the positioning lugs are fixedly connected with the outer ring through springs. The distance from the positioning hole to the center of the flange can be adjusted by arranging the spring between the outer ring and the positioning lug, so that the application range of the wave-tooth composite gasket is enlarged; the rubber cushion pad is arranged in the groove III, so that the outer ring and the metal framework I are prevented from deforming due to the fact that the spring is directly contacted with the outer ring, and the stability of the corrugated tooth composite gasket is improved; the annular metal framework II is arranged in the sealing ring I, so that the sealing ring is supported together, and the service life of the wave tooth composite gasket is prolonged.

Description

Wave tooth composite gasket

Technical Field

The utility model belongs to the technical field of seal gasket, in particular to ripples tooth composite pad piece.

Background

The corrugated tooth composite gasket is a metal composite gasket, generally, firstly, a precise lathe or a special milling machine is used for processing concentric wave-shaped grooves on two surfaces of a metal flat gasket, the tooth tips of the upper surface and the lower surface are mutually staggered, so that the gasket has better compression resilience performance, because the contact with other sealing surfaces is the line contact of a plurality of concentric circles, the gasket has the labyrinth sealing effect, flexible graphite can be selected according to different media and working conditions, PTFE (polytetrafluoroethylene), asbestos-free plates or other soft metals are pasted on two surfaces of the gasket, the sealing performance of a soft covering layer and the strength of the metal are utilized, and the gasket has good elasticity, so that the better sealing effect is achieved.

However, the existing corrugated tooth composite gasket is not easy to align with a flange in the installation process, and is easy to deviate, and the like, so that the sealing performance between the flange sealing surface and the gasket is reduced in serious cases, thereby causing leakage and having great potential safety hazards. In the prior art, generally, a positioning lug is arranged outside a corrugated tooth composite gasket, a positioning hole is arranged on the positioning lug, and a bolt connected with a flange passes through the positioning hole to align the corrugated tooth composite gasket. However, this approach is only suitable for flanges in which the bolt holes are fixed from the center of the flange.

Meanwhile, in the use process of the existing wave tooth composite gasket, corrosive fluid needing to be sealed easily corrodes the wave tooth composite gasket, so that the structure of the wave tooth composite gasket is damaged, and the service life of the wave tooth composite gasket is finally influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a ripples tooth composite pad piece to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a wave tooth composite gasket comprises an annular metal framework I1, wave teeth 2 which are concentric with the annular metal framework I1 are arranged on the upper side and the lower side of the annular metal framework I1, and a flexible non-metal layer 3 is further arranged on the surfaces of the wave teeth 2; an outer ring 4 is arranged on the outer circumference of the annular metal framework I1, and an inner ring 5 is arranged on the inner circumference; the outer ring 4 is distributed with a plurality of groups of positioning lugs 6, each group of positioning lugs 6 is provided with a positioning hole 7, and the positioning lugs 6 are fixedly connected with the outer ring 4 through springs 8.

Preferably, the inner ring 5 comprises a first sealing ring 9 tightly attached to the inner circumference of the first annular metal framework 1 and a second annular metal framework 10 used for supporting the first sealing ring 9, and the second annular metal framework 10 is fixedly arranged inside the first sealing ring 9.

Furthermore, the joint of the first sealing ring 9 and the first annular metal framework 1 is provided with a plurality of groups of bulges, and the first annular metal framework 1 is provided with a plurality of groups of sealing grooves matched with the bulges.

Further, the bulge comprises a connecting part 11 and an inserting part 12, the sealing groove comprises a first groove 13 matched with the connecting part 11 and a second groove 14 matched with the inserting part 12, the first groove 13 is communicated with the second groove 14, and the size of the first groove 13 is smaller than that of the second groove 14.

Preferably, the side surface of the outer ring 4 is provided with a plurality of grooves three 15, and the number of the grooves three is consistent with the number of the groups of the positioning lugs 6.

Further, a spring 8 and a rubber cushion 16 are arranged in each group of the third grooves 15, and the rubber cushion 16 is fixedly connected with the third grooves 15; one end of the spring 8 is fixedly connected with the rubber cushion 16, and the other end is fixedly connected with the positioning lug 6.

Further, a second sealing ring 17 is attached to the surface of the outer ring 4, and a through hole matched with the third groove 15 is formed in the second sealing ring 17.

Preferably, the surfaces of the spring 8 and the positioning ear 6 are both provided with corrosion-resistant coatings.

The utility model discloses the beneficial effect that technical scheme brought is: the distance from the positioning hole to the center of the flange can be adjusted by arranging the spring between the outer ring and the positioning lug, so that the application range of the wave-tooth composite gasket is enlarged; the rubber cushion pad is arranged in the groove III, so that the outer ring and the metal framework I are prevented from deforming due to the fact that the spring is directly contacted with the outer ring, and the stability of the corrugated tooth composite gasket is improved; the annular metal framework II is arranged in the sealing ring I, so that the sealing ring is supported together, and the service life of the wave tooth composite gasket is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a wave-tooth composite gasket according to an embodiment of the present invention;

FIG. 2 is a half sectional view of FIG. 1;

Fig. 3 is a schematic view of the boss and seal groove of fig. 1.

In the figure: the sealing structure comprises a first annular metal framework, 2 wave teeth, 3 flexible non-metal layers, 4 outer rings, 5 inner rings, 6 positioning lugs, 7 positioning holes, 8 springs, 9 first sealing rings, 10 second annular metal frameworks, 11 connecting parts, 12 inserting parts, 13 first grooves, 14 second grooves, 15 third grooves, 16 rubber buffer pads and 17 second sealing rings.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-2, the utility model provides the following technical solutions: a wave tooth composite gasket comprises an annular metal framework I1, wherein wave teeth 2 which are concentric with the annular metal framework I1 are arranged on the upper side and the lower side of the annular metal framework I1, and the wave teeth 2 on the upper side and the lower side are arranged in a staggered mode; the wave teeth 2 are also provided with a flexible non-metal layer 3 on the surface. Wherein the flexible non-metal layer 3 is an expanded graphite layer. An outer ring 4 is arranged on the outer circumference of the first annular metal framework 1, an inner ring 5 is arranged on the inner circumference, and the outer ring 4 and the inner ring 5 both play a role in protecting the first annular metal framework 1. The outer ring 4 is distributed with a plurality of groups of positioning lugs 6, each group of positioning lugs 6 is provided with a positioning hole 7, and the positioning lugs 6 are fixedly connected with the outer ring 4 through springs 8.

In this embodiment, preferably, the inner ring 5 includes a first sealing ring 9 tightly attached to the inner circumference of the first annular metal framework 1 and a second annular metal framework 10 for supporting the first sealing ring 9, and the second annular metal framework 10 is fixedly disposed inside the first sealing ring 9. The design can effectively prevent the first sealing ring 9 from deforming under the extrusion of the upper flange end face and the lower flange end face and even separating from the first metal framework 1, and the service life of the wave tooth composite gasket is prolonged. Specifically, the height of the annular metal framework II 10 is consistent with that of the annular metal framework I1, and the height of the sealing ring I9 is consistent with the sum of the heights of the annular metal framework I1 and the flexible nonmetal layer 3. The design effectively avoids the corrosion of liquid to the annular metal framework I1.

In this embodiment, furthermore, a plurality of sets of protrusions are arranged at a joint of the first sealing ring 9 and the first annular metal framework 1, and a plurality of sets of sealing grooves matched with the protrusions are arranged on the first annular metal framework 1. The bulge on the first sealing ring 9 is matched with the sealing groove on the first annular metal framework 1, so that the first sealing ring 9 is attached to the first annular metal framework 1 more tightly, and the sealing performance of the first annular metal framework 1 and the first sealing ring 9 is enhanced.

In the embodiment, as shown in fig. 3, further, the protrusion includes a connecting portion 11 and an inserting portion 12, the sealing groove includes a first groove 13 matching with the connecting portion 11 and a second groove 14 matching with the inserting portion 12, the first groove 13 is communicated with the second groove 14, and the size of the first groove 13 is smaller than that of the second groove 14. Specifically, the insertion portion 12 and the second groove 14 are both arc-shaped structures, the connection portion 11 can be made of hard metal or flexible material, and the insertion portion 12 is made of flexible material. The design is favorable for inserting the insertion part 12 into the second groove 14, and the insertion part 12 is not separated from the second groove 14, so that the stability of the wave-tooth composite gasket is further enhanced.

In this embodiment, it is preferable that the side surface of the outer ring 4 is provided with a plurality of grooves three 15, and the number of the grooves three is consistent with the number of the groups of the positioning lugs 6. Specifically, the positioning lugs 6 may be provided in 6 groups.

In this embodiment, further, a spring 8 and a rubber cushion 16 are arranged in each group of the third grooves 15, and the rubber cushion 16 is fixedly connected with the third grooves 15; one end of the spring 8 is fixedly connected with the rubber cushion 16, and the other end is fixedly connected with the positioning lug 6. The rubber buffer 16 is arranged for buffering the elasticity of the spring 8 to the outer ring 4, and the deformation of the outer ring 4 and the annular metal framework I1 is avoided.

In this embodiment, a second sealing ring 17 is further attached to the surface of the outer ring 4, and a through hole matched with the third groove 15 is formed in the second sealing ring 17. Specifically, the second sealing ring 17 is attached to the upper surface, the lower surface and the side surface provided with the third groove of the outer ring 4. And the height of the second sealing ring 17 is consistent with the sum of the heights of the first annular metal framework 1 and the flexible non-metal layer 3. Meanwhile, in order to further improve the sealing performance of the second sealing ring 17 and the outer ring 4, a bulge is also arranged on the second sealing ring 17, and a sealing groove matched with the bulge is arranged on the outer ring 4.

In the present embodiment, it is preferable that the surfaces of the spring 8 and the positioning ear 6 are provided with corrosion-resistant coatings. Specifically, the corrosion-resistant coating can be an electrogalvanized coating. The design is beneficial to avoiding the corrosion of the spring 8 and the positioning lug 6 caused by long-term exposure to air, and the service life of the spring is prolonged.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrugated tooth composite gasket comprises a first annular metal framework (1), wherein corrugated teeth (2) which are concentric with the first annular metal framework (1) are arranged on the upper side and the lower side of the first annular metal framework (1), and a flexible non-metal layer (3) is further arranged on the surface of each corrugated tooth (2); the device is characterized in that an outer ring (4) is arranged on the outer circumference of the annular metal framework I (1), and an inner ring (5) is arranged on the inner circumference; the outer ring (4) is externally provided with a plurality of groups of positioning lugs (6), each group of positioning lugs (6) is provided with positioning holes (7), and the positioning lugs (6) are fixedly connected with the outer ring (4) through springs (8).

2. The corrugated composite gasket according to claim 1, wherein the inner ring (5) comprises a first sealing ring (9) tightly attached to the inner circumference of the first annular metal framework (1) and a second annular metal framework (10) for supporting the first sealing ring (9), and the second annular metal framework (10) is fixedly arranged inside the first sealing ring (9).

3. The corrugated composite gasket according to claim 2, wherein a plurality of groups of protrusions are arranged at the joint of the first sealing ring (9) and the first annular metal framework (1), and a plurality of groups of sealing grooves matched with the protrusions are arranged on the first annular metal framework (1).

4. The corrugated composite gasket of claim 3, wherein the protrusion comprises a connecting portion (11) and an insert portion (12), the sealing groove comprises a first groove (13) matching the connecting portion (11) and a second groove (14) matching the insert portion (12), the first groove (13) and the second groove (14) are in communication, and the first groove (13) has a size smaller than the second groove (14).

5. A wave-tooth composite gasket according to claim 1, characterized in that the side of the outer ring (4) is provided with a number of grooves three (15) corresponding to the number of sets of positioning lugs (6).

6. The corrugated composite gasket according to claim 5, wherein each group of three grooves (15) is provided with a spring (8) and a rubber cushion (16), and the rubber cushion (16) is fixedly connected with the three grooves (15); one end of the spring (8) is fixedly connected with the rubber cushion pad (16), and the other end of the spring is fixedly connected with the positioning lug (6).

7. The corrugated tooth composite gasket according to claim 5, wherein a second sealing ring (17) is further attached to the surface of the outer ring (4), and a through hole matched with the third groove (15) is formed in the second sealing ring (17).

8. A corrugated composite shim as claimed in claim 1, characterised in that the spring (8) and locating lug (6) surfaces are provided with corrosion resistant coatings.