CN213711848U

CN213711848U - Exhaust pipe composite gasket

Info

Publication number: CN213711848U
Application number: CN202022695341.9U
Authority: CN
Inventors: 殷晏
Original assignee: Wuxi Baoyifeng Sealing Material Co ltd
Current assignee: Wuxi Baoyifeng Sealing Material Co ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-07-16
Anticipated expiration: 2030-11-20

Abstract

The utility model discloses a blast pipe composite pad piece, including composite pad piece, composite pad piece is cyclic annular, composite pad piece is total five layers, is first graphite layer, second silk stratum reticulare, third graphite layer, fourth silk stratum reticulare and fifth graphite layer from top to bottom in proper order. The second silk screen layer and the fourth silk screen layer are both formed by compounding two silk screens; the meshes of the two layers of silk screens forming the same silk screen layer are arranged in a staggered mode. The mesh radius of the wire mesh close to the first graphite layer is larger in the two wire meshes forming the second wire mesh layer; the mesh radius of the wire mesh close to the fifth graphite layer is larger in the two wire meshes forming the fourth wire mesh layer; meshes of the silk screens on the second silk screen layer and the fourth silk screen layer are conical. The utility model discloses improve the metal level structure in the gasket, make it can improve the heat conductivility between the graphite, can guarantee the bulk strength of gasket again.

Description

Exhaust pipe composite gasket

Technical Field

The utility model relates to a sealing member technical field especially relates to a blast pipe composite pad piece.

Background

Graphite metal wound gaskets are one type of seal used widely in the joining of pipe flanges in various industries. The graphite metal wound gasket has excellent sealing performance and can have good sealing effect under the conditions of high temperature and high pressure. Graphite metal wound gaskets are also used in engine exhaust pipes. The metal layer in the metal wound gasket may enhance the strength of the gasket, but the presence of the metal layer may also affect the thermal conduction between the graphites. When the generator is stopped or started, the exhaust pipe may have large thermal fluctuations, and if the metal-wound gasket has poor thermal conductivity, the metal-wound gasket may easily creep and relax in the presence of frequent thermal fluctuations, which may affect the sealing performance of the gasket. Therefore, there is a need to improve the metal layer structure of the existing exhaust pipe gasket, so that the heat conduction performance between graphite can be improved, and the overall strength of the gasket can be ensured.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the not enough of existence among the prior art, the utility model provides a blast pipe composite gasket improves the metal level structure in the gasket, makes it can improve the heat conductivility between the graphite, can guarantee the bulk strength of gasket again.

The technical scheme is as follows: in order to achieve the above object, the utility model discloses a blast pipe composite gasket, including composite gasket, composite gasket is cyclic annular, composite gasket is formed by the upper and lower alternate complex of a plurality of annular graphite layers and a plurality of annular silk screen layers, just composite gasket's the superiors and the lower floor are the graphite layer.

Furthermore, the composite gasket has five layers which are a first graphite layer, a second silk screen layer, a third graphite layer, a fourth silk screen layer and a fifth graphite layer from top to bottom in sequence.

Furthermore, the composite gasket is formed by laminating a first graphite layer, a second silk screen layer, a third graphite layer, a fourth silk screen layer and a fifth graphite layer; the thickness of the first graphite layer, the thickness of the third graphite layer and the thickness of the fifth graphite layer are all 0.8mm, the thickness of the second silk screen layer and the thickness of the fourth silk screen layer are all 0.1mm, and the thickness of the composite gasket formed by pressing is 2 mm.

Further, two adjacent graphite layers penetrate through the mesh layer between the two graphite layers and are connected with each other.

Further, the second silk screen layer and the fourth silk screen layer are formed by compounding two layers of silk screens; the meshes of the two layers of silk screens forming the same silk screen layer are arranged in a staggered mode.

Further, of the two wire mesh layers constituting the second wire mesh layer, the mesh radius of the wire mesh layer adjacent to the first graphite layer is larger; and the mesh radius of the wire mesh close to the fifth graphite layer is larger in the two wire meshes forming the fourth wire mesh layer.

Furthermore, meshes of the silk screens on the second silk screen layer and the fourth silk screen layer are both conical; the side, close to each other, of meshes of two layers of silk screens on the same silk screen layer is a conical large opening side, and the side, far away from each other, of meshes of the two layers of silk screens is a conical small opening side.

Has the advantages that: the utility model discloses a blast pipe composite pad piece, its beneficial effect as follows:

1) the metal layer in the gasket is a silk screen layer, and two adjacent graphite layers penetrate through the silk screen layer between the two graphite layers and are connected with each other, so that the heat conduction performance of the graphite layers can be improved, and the creep relaxation of the gasket under frequent cold and hot changes is avoided;

2) a single silk screen layer comprises two-layer composite silk screen, and the mesh of the two-layer silk screen of constituteing same silk screen layer sets up by crisscross each other, and the mesh of silk screen be the toper, can form the big-end-up in a plurality of and the conical mesh chamber in two between the single silk screen layer, and the mesh chamber of this shape is compared in the structural strength of the two-layer silk screen of tiling bigger, and graphite infiltration mesh intracavity back and silk screen interweave as an organic whole in addition, can promote the bulk strength of gasket.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view showing the mesh structure of two wire nets constituting the second wire net layer.

Detailed Description

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

The exhaust pipe composite gasket as shown in fig. 1 to 2 comprises a composite gasket 8, wherein the composite gasket 8 is annular, the composite gasket 8 is formed by alternately compounding a plurality of annular graphite layers and a plurality of annular silk screen layers from top to bottom, and the uppermost layer and the lowermost layer of the composite gasket 8 are both graphite layers. The uppermost layer and the lowermost layer of the graphite layer need to be in contact with the interface part of the exhaust pipe so as to play a role in sealing. The presence of the mesh layer may improve the overall strength of the composite shim 8. The metal layer in the composite gasket 8 is a silk screen layer, so that two adjacent graphite layers penetrate through the silk screen layer between the two graphite layers and are connected with each other, the heat conduction performance of the graphite layers can be improved, and creep relaxation of the composite gasket 8 under frequent cold and hot changes is avoided.

Composite pad 8 has five layers altogether, from top to bottom is first graphite layer 1, second silk screen layer 2, third graphite layer 3, fourth silk screen layer 4 and fifth graphite layer 5 in proper order, and in the practical application process, the graphite layer and silk screen layer overlap from top to bottom for the result of use of five layers better, pile up too many the number of piles and can raise the cost. Whereas if composite mat 8 had only three layers, the only intermediate mesh layer would be difficult to provide sufficient strength to composite mat 8.

The composite gasket 8 is made of a first graphite layer 1, a second mesh layer 2, a third graphite layer 3, a fourth mesh layer 4 and a fifth graphite layer 5 through pressing. The thicknesses of the first graphite layer 1, the third graphite layer 3, and the fifth graphite layer 5 as raw materials were all 0.8mm, the thicknesses of the second mesh layer 2 and the fourth mesh layer 4 as raw materials were all 0.1mm, and the thickness of the composite gasket 8 produced by press-fitting was 2 mm. The degree of compression of composite gasket 8 is limited, and composite gasket 8 with the degree of compression has both good sealing performance and strength during actual use.

After the composite gasket 8 is pressed and manufactured, two adjacent graphite layers can penetrate through the silk screen layer between the two graphite layers and are connected with each other, the heat conduction performance of the graphite layers can be improved due to the mutual communication of the graphite layers, and creep relaxation of the composite gasket 8 under frequent cold and hot changes is avoided.

The second silk screen layer 2 and the fourth silk screen layer 4 are both formed by compounding two silk screens; the meshes of the two layers of silk screens forming the same silk screen layer are arranged in a staggered mode. The meshes arranged in a staggered mode enable two layers of silk screens forming the same silk screen layer to be mutually supported in a complementary mode, and therefore strength of the silk screen layer is improved.

Of the two wire mesh layers forming the second wire mesh layer 2, the mesh radius of the wire mesh close to the first graphite layer 1 is larger; of the two mesh layers constituting the fourth mesh layer 4, the mesh radius of the mesh layer adjacent to the fifth graphite layer 5 is larger. Meshes with different radiuses can enable two layers of silk screens forming the same silk screen layer to be larger in mutual staggering, and the complementary supporting effect is better. The mesh radius of the screen near the outer side is selected to be larger because the first graphite layer 1 and the fifth graphite layer 5 come into contact with the interface portion of the exhaust pipe and the requirement for heat conductivity is higher.

Meshes of the silk screens on the second silk screen layer 2 and the fourth silk screen layer 4 are both conical; the side, close to each other, of meshes of two layers of silk screens on the same silk screen layer is a conical large opening side, and the side, far away from each other, of meshes of the two layers of silk screens is a conical small opening side; can form the mesh chamber of big-end-in-size and two end cones in a plurality of between the two-layer silk screen of single silk screen layer, the mesh chamber of this shape is compared in the structural strength of the two-layer silk screen of tiling bigger, and graphite interweaves as an organic whole with the silk screen after permeating the mesh intracavity in addition, can promote the bulk strength of gasket.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An exhaust pipe composite gasket, characterized in that: including composite pad piece (8), composite pad piece (8) are cyclic annular, composite pad piece (8) are formed by the upper and lower alternate complex of a plurality of annular graphite layers and a plurality of annular silk screen layers, just the superiors and the lower floor of composite pad piece (8) are the graphite layer.

2. The exhaust pipe composite gasket as set forth in claim 1, wherein: the composite gasket (8) comprises five layers which are a first graphite layer (1), a second silk screen layer (2), a third graphite layer (3), a fourth silk screen layer (4) and a fifth graphite layer (5) from top to bottom in sequence.

3. The exhaust pipe composite gasket as set forth in claim 2, wherein: the composite gasket (8) is formed by laminating a first graphite layer (1), a second silk screen layer (2), a third graphite layer (3), a fourth silk screen layer (4) and a fifth graphite layer (5); the thickness of the first graphite layer (1), the thickness of the third graphite layer (3) and the thickness of the fifth graphite layer (5) are all 0.8mm, the thickness of the second silk screen layer (2) and the thickness of the fourth silk screen layer (4) are all 0.1mm, and the thickness of the composite gasket (8) formed by pressing is 2 mm.

4. The exhaust pipe composite gasket as set forth in claim 3, wherein: two adjacent graphite layers penetrate through the silk screen layer between the two graphite layers and are connected with each other.

5. The exhaust pipe composite gasket as set forth in claim 2, wherein: the second silk screen layer (2) and the fourth silk screen layer (4) are formed by compounding two silk screens; the meshes of the two layers of silk screens forming the same silk screen layer are arranged in a staggered mode.

6. The exhaust pipe composite gasket as set forth in claim 5, wherein: the mesh radius of the wire mesh close to the first graphite layer (1) in the two wire mesh layers forming the second wire mesh layer (2) is larger; of the two wire mesh layers constituting the fourth wire mesh layer (4), the wire mesh layer adjacent to the fifth graphite layer (5) has a larger mesh radius.

7. The exhaust pipe composite gasket as set forth in claim 6, wherein: meshes of the silk screens on the second silk screen layer (2) and the fourth silk screen layer (4) are both conical; the side, close to each other, of meshes of two layers of silk screens on the same silk screen layer is a conical large opening side, and the side, far away from each other, of meshes of the two layers of silk screens is a conical small opening side.