Multi-layer sealing gasket not prone to deformation

Abstract

The utility model relates to the technical field of sealing gaskets, in particular to a multilayer sealing gasket not prone to deformation, which comprises a first flexible graphite sealing layer and a second flexible graphite sealing layer, and a metal supporting interlayer is arranged between the first flexible graphite sealing layer and the second flexible graphite sealing layer. The upper end and the lower end of the metal supporting interlayer are each provided with an anti-oxidation composite adhesive layer, the first flexible graphite sealing layer is fixedly bonded to the upper end of the metal supporting interlayer through the anti-oxidation composite adhesive layers, and the second flexible graphite sealing layer is fixedly bonded to the lower end of the metal supporting interlayer through the anti-oxidation composite adhesive layers. The multilayer sealing gasket not prone to deformation is high in mechanical strength, not prone to deformation, long in service life, capable of ensuring reliable sealing under severe working conditions such as high pressure and high temperature and suitable for various different application occasions, especially pipeline connection in the industries of chemical engineering, petroleum, natural gas and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing gasket, especially to a multilayer sealing gasket not easy to deform. BACKGROUND

[0002] Traditional sealing gaskets are mostly made of single material, such as pure flexible graphite or metal gaskets. These gaskets can meet the basic sealing requirements to a certain extent, but they are prone to deformation, aging or damage in extreme environments such as high temperature, high pressure and chemical corrosion, thereby causing leakage and other problems. In particular, in the special environment of the chemical, petroleum and natural gas industries, the requirements for sealing materials are more stringent. Not only must they withstand extreme working conditions, but they must also ensure long-term stability and low maintenance costs. Therefore, we propose a multilayer sealing gasket not easy to deform. SUMMARY

[0003] The main purpose of the utility model is to provide a multilayer sealing gasket not easy to deform, which can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0005] A multilayer sealing gasket not easy to deform, comprising a first flexible graphite sealing layer and a second flexible graphite sealing layer, a metal support interlayer is arranged between the first flexible graphite sealing layer and the second flexible graphite sealing layer, an oxidation-resistant composite adhesive layer is arranged at the upper end and the lower end of the metal support interlayer, the first flexible graphite sealing layer is fixedly bonded to the upper end of the metal support interlayer through the oxidation-resistant composite adhesive layer, and the second flexible graphite sealing layer is fixedly bonded to the lower end of the metal support interlayer through the oxidation-resistant composite adhesive layer.

[0006] Preferably, the upper end and the lower end of the metal support interlayer are integrally formed with extension protruding rings, and the two extension protruding rings are coaxially arranged with the metal support interlayer.

[0007] By adopting the above technical scheme: the design of the metal support interlayer provides sufficient rigidity to prevent the sealing gasket from deforming.

[0008] Preferably, the thickness of the extension protruding ring is two to three times the thickness of the oxidation-resistant composite adhesive layer.

[0009] By adopting the above technical scheme: the connection firmness between the metal support interlayer and the first flexible graphite sealing layer and the second flexible graphite sealing layer is enhanced.

[0010] Preferably, the first flexible graphite sealing layer comprises a flexible graphite pad and a connecting metal mesh layer, two flexible graphite pads are arranged, and the connecting metal mesh layer is fixedly connected between the two flexible graphite pads.

[0011] By adopting the technical scheme, the combination between the two flexible graphite pads is significantly improved by arranging the connecting metal mesh layer between the two flexible graphite pads, the mechanical strength of the first flexible graphite sealing layer and the second flexible graphite sealing layer is improved, and the service life of the sealing gasket is prolonged.

[0012] Preferably, the lower end of the lower flexible graphite pad is provided with a reinforcing groove matched with the extending protruding ring, and the upper part of the extending protruding ring extends into the reinforcing groove to fix and connect the metal support sandwich layer to the lower end of the first flexible graphite sealing layer.

[0013] By adopting the technical scheme, the leakage problem caused by the deformation of the sealing element is significantly reduced by embedding the extending protruding ring on the metal support sandwich layer into the reinforcing groove on the flexible graphite pad, and the sealing effect is further enhanced.

[0014] Preferably, the structure of the second flexible graphite sealing layer is the same as that of the first flexible graphite sealing layer, and the second flexible graphite sealing layer and the first flexible graphite sealing layer are arranged in an up-down symmetry, and the connecting mode of the second flexible graphite sealing layer and the metal support sandwich layer is the same as that of the first flexible graphite sealing layer and the metal support sandwich layer.

[0015] By adopting the technical scheme, the sealing gasket can be applied to various application occasions, such as pipeline connection in chemical industry, petroleum industry, natural gas industry and the like.

[0016] Compared with the prior art, the sealing gasket has the following beneficial effects:

[0017] 1. By arranging the connecting metal mesh layer between the two flexible graphite pads, the combination between the two flexible graphite pads is significantly improved, the mechanical strength of the first flexible graphite sealing layer and the second flexible graphite sealing layer is improved, the service life of the sealing gasket is prolonged, reliable sealing under harsh working conditions such as high pressure and high temperature can be ensured, and the sealing gasket can be applied to various application occasions, such as pipeline connection in chemical industry, petroleum industry, natural gas industry and the like.

[0018] 2. The metal support sandwich layer is arranged between the first flexible graphite sealing layer and the second flexible graphite sealing layer to provide sufficient rigidity to prevent the sealing gasket from deforming, and the extending protruding ring of the metal support sandwich layer is embedded into the reinforcing groove on the flexible graphite pad to significantly reduce the leakage problem caused by the deformation of the sealing element, further enhance the sealing effect, and the use of the oxidation-resistant composite adhesive layer not only provides good adhesion, but also effectively prevents oxidation corrosion and prolongs the service life of the entire sealing gasket. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1The utility model discloses a whole structure schematic diagram of multilayer sealing gasket not easy to deform.

[0020] Figure 2 The utility model discloses a component structure schematic diagram of multilayer sealing gasket not easy to deform.

[0021] Figure 3 The utility model discloses a structure schematic diagram of metal support interlayer of multilayer sealing gasket not easy to deform.

[0022] Figure 4 The utility model discloses a component structure schematic diagram of no. 1 flexible graphite sealing layer of multilayer sealing gasket not easy to deform.

[0023] In the drawing: 1, no. 1 flexible graphite sealing layer;11, flexible graphite pad;111, reinforcing groove;12, connecting metal net layer;2, no. 2 flexible graphite sealing layer;3, metal support interlayer;31, extension convex ring;4, antioxidant composite glue layer. DETAILED DESCRIPTION

[0024] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model is further described in combination with specific embodiments.

[0025] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like is the orientation or position relation based on the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0027] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0028] The application discloses a non-deformable multilayer sealing gasket, which comprises a first flexible graphite sealing layer 1 and a second flexible graphite sealing layer 2, a metal supporting interlayer 3 is arranged between the first flexible graphite sealing layer 1 and the second flexible graphite sealing layer 2, and an oxidation-resistant composite glue layer 4 is arranged at the upper end and the lower end of the metal supporting interlayer 3; the first flexible graphite sealing layer 1 is fixedly bonded to the upper end of the metal supporting interlayer 3 through the oxidation-resistant composite glue layer 4, and the second flexible graphite sealing layer 2 is fixedly bonded to the lower end of the metal supporting interlayer 3 through the oxidation-resistant composite glue layer 4.

[0029] In the embodiment, the upper end and the lower end of the metal supporting interlayer 3 are integrally formed with extension protruding rings 31, and the two extension protruding rings 31 are coaxially arranged with the metal supporting interlayer 3; the thickness of the extension protruding ring 31 is two to three times the thickness of the oxidation-resistant composite glue layer 4; the upper portion of the extension protruding ring 31 extends into the reinforcing groove 111 and fixes and connects the metal supporting interlayer 3 to the lower end of the first flexible graphite sealing layer 1.

[0030] Through the above scheme, the metal supporting interlayer 3 is arranged between the first flexible graphite sealing layer 1 and the second flexible graphite sealing layer 2, sufficient rigidity is provided to prevent the sealing gasket from deforming, the extension protruding ring 31 is embedded into the reinforcing groove 11 on the flexible graphite pad 11, the leakage problem caused by the deformation of the sealing element is significantly reduced, the sealing effect is further enhanced, the oxidation-resistant composite glue layer 4 not only provides good bonding force, but also effectively prevents oxidation and corrosion, and the service life of the entire sealing gasket is prolonged.

[0031] In the embodiment, the first flexible graphite sealing layer 1 comprises two flexible graphite pads 11 and a connecting metal mesh layer 12, the connecting metal mesh layer 12 is fixedly connected between the two flexible graphite pads 11; the lower end of the lower flexible graphite pad 11 is provided with a reinforcing groove 111 matched with the extension protruding ring 31, the second flexible graphite sealing layer 2 has the same structure as the first flexible graphite sealing layer 1, and the second flexible graphite sealing layer 2 is arranged in an upper-lower symmetrical mode with the first flexible graphite sealing layer 1, and the connecting mode of the second flexible graphite sealing layer 2 and the metal supporting interlayer 3 is the same as the connecting mode of the first flexible graphite sealing layer 1 and the metal supporting interlayer 3.

[0032] Through the above scheme, the connecting metal mesh layer 12 is arranged between the two flexible graphite pads 11, the bonding force between the two flexible graphite pads 11 is significantly improved, the mechanical strength of the first flexible graphite sealing layer 1 and the second flexible graphite sealing layer 2 is improved, the service life of the entire sealing gasket is prolonged, reliable sealing under harsh working conditions such as high pressure and high temperature can be ensured, and the sealing gasket can be applied to various application occasions, such as pipeline connection in chemical industry, petroleum industry and natural gas industry.

[0033] It should be noted that the utility model discloses a multilayer sealing gasket not easy to deform, in the use process, set up the connecting metal screen layer 12 between two flexible graphite pads 11, significantly improve the binding force between two flexible graphite pads 11, improve the mechanical strength of flexible graphite sealing layer 1 and flexible graphite sealing layer 2 simultaneously, prolong the service life of sealing gasket whole, can ensure reliable sealing under the adverse working conditions such as high pressure, high temperature, the sealing gasket can be applicable to a variety of different application occasions, such as chemical industry, petroleum, natural gas etc. in the pipeline connection of industry, set up the metal support interlayer 3 between flexible graphite sealing layer 1 and flexible graphite sealing layer 2, provide enough rigidity to prevent sealing gasket deformation, and through its extension convex ring 31 embeds in the reinforcing groove 11 on flexible graphite pad 11, significantly reduce the leakage problem caused by sealing element deformation, further enhance the sealing effect, the use of oxidation-resistant composite adhesive layer 4 not only provides good adhesive force, but also effectively prevents oxidation corrosion, prolongs the service life of entire sealing gasket.

[0034] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A non-deformable multi-layered gasket, characterized by: The application relates to a flexible graphite sealing layer, which comprises a first flexible graphite sealing layer (1) and a second flexible graphite sealing layer (2), a metal supporting interlayer (3) is arranged between the first flexible graphite sealing layer (1) and the second flexible graphite sealing layer (2), the upper end and the lower end of the metal supporting interlayer (3) are provided with an oxidation-resistant composite adhesive layer (4), the first flexible graphite sealing layer (1) is fixedly bonded to the upper end of the metal supporting interlayer (3) through the oxidation-resistant composite adhesive layer (4), and the second flexible graphite sealing layer (2) is fixedly bonded to the lower end of the metal supporting interlayer (3) through the oxidation-resistant composite adhesive layer (4).

2. A non-deformable multi-layered gasket according to claim 1, wherein: The upper end and the lower end of the metal supporting interlayer (3) are integrally provided with extension protruding rings (31), and the two extension protruding rings (31) are coaxially arranged with the metal supporting interlayer (3).

3. A non-deformable multi-layered gasket according to claim 1, wherein: The thickness of the extension protruding ring (31) is two to three times the thickness of the oxidation-resistant composite adhesive layer (4).

4. The non-deformable multi-layer gasket of claim 1 wherein: The first flexible graphite sealing layer (1) comprises flexible graphite pads (11) and a connecting metal mesh layer (12), two flexible graphite pads (11) are arranged, and the connecting metal mesh layer (12) is fixedly connected between the two flexible graphite pads (11).

5. A non-deformable multi-layer gasket according to claim 3, wherein: The lower end of the lower flexible graphite pad (11) is provided with a reinforcing groove (111) matched with the extension protruding ring (31), and the upper portion of the extension protruding ring (31) extends into the reinforcing groove (111) to fixedly connect the metal supporting interlayer (3) to the lower end of the first flexible graphite sealing layer (1).

6. A non-deformable multi-layer gasket according to claim 4, wherein: The second flexible graphite sealing layer (2) has the same structure as the first flexible graphite sealing layer (1), and the second flexible graphite sealing layer (2) is arranged in an upside-down symmetrical mode with the first flexible graphite sealing layer (1), and the connecting mode of the second flexible graphite sealing layer (2) and the metal supporting interlayer (3) is the same as the connecting mode of the first flexible graphite sealing layer (1) and the metal supporting interlayer (3).

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