Composite sealing gasket

Abstract

The utility model belongs to the technical field of sealing gaskets, and discloses a composite sealing gasket which comprises a gasket body, a main hole, a key groove hole and a bolt hole are formed in the gasket body, and the edge of the inner side of the main hole is coated with a protective ring made of metal. Convex ribs are fixedly connected to the positions, surrounding the edges of the main hole, the key groove hole and the bolt hole, of the front face and the back face of the gasket body, the convex ribs located at the hole positions are connected with one another, and the convex ribs located at the edge of the main hole are located on the periphery of the protective ring. Only the edge of the main hole is covered by the metal retainer, and the convex ribs are arranged on the periphery of the main hole and the edges of special-shaped holes such as a bolt hole and a key slot hole, so that the plane pressure borne by the retainer can be effectively shared, the leakage risk of other hole sites is reduced, the process difficulty is low, the production efficiency is high, and the assembly application of a product is better fitted.

Description

Technical Field

[0001] The present application relates to the technical field of sealing gaskets, and more specifically, to a composite sealing gasket. Background Art

[0002] Graphite, the main material of graphite gaskets, has extremely excellent temperature resistance (-260℃~+1500℃), corrosion resistance, good compression resilience, and low stress relaxation rate. The seals made of it have good sealing performance. The disadvantage is that its mechanical strength is not high enough, so it is limited when used alone. For this reason, it is generally made into a composite gasket with other materials. The graphite composite gasket is composed of a metal sheet as a skeleton and a composite flexible graphite on its surface. The metal sheet as a skeleton only serves to increase the strength and overall rigidity for processing and use. Although the graphite composite gasket has good sealing performance, it is limited by the strength of the material and it is difficult to meet the safety performance of high pressure strength. There are some improved graphite composite gaskets with increased metal guard rings. The inner guard ring can block the debris generated by the graphite cross section from entering the oil cavity, protect the flatness and uniformity of the cross section, improve the sealing strength and prevent the risk of cross section penetration and burning. However, this structure has new disadvantages. The guard ring bears most of the plane pressure of the gasket, causing leakage risks in other parts, and adding special-shaped guard rings in other parts greatly increases the process difficulty. Utility Model Content

[0003] In order to solve the above problems, the present application provides a composite sealing gasket.

[0004] The composite sealing gasket provided in this application adopts the following technical solution:

[0005] A composite sealing gasket comprises a gasket body, wherein the gasket body has a main hole, a keyway hole and a bolt hole, the inner edge of the main hole is covered with a protective ring made of a metal material, and the front and back sides of the gasket body are fixedly connected with ribs at the edges surrounding the main hole, the keyway hole and the bolt hole, the ribs located at each hole position are connected to each other, and the ribs located at the edge of the main hole are located on the periphery of the protective ring.

[0006] Furthermore, the convex rib is made of graphite and is fixed to the gasket body by gluing or pressing.

[0007] Furthermore, the width of the convex rib is not less than the width of the retaining ring.

[0008] Furthermore, the convex ribs may also be made of silk-screened silicone wire.

[0009] Furthermore, the thickness of one side of the convex rib is 0.1-0.5 mm.

[0010] In summary, the present application includes at least one of the following beneficial technical effects:

[0011] The application only uses a metal guard ring to wrap the edge of the main hole, and then sets convex ribs on its periphery and on the edges of special-shaped holes such as bolt holes and keyway holes. This can effectively share the plane pressure borne by the guard ring position and reduce the leakage risk of other hole positions. The process has low difficulty and high production efficiency, and is more suitable for product assembly applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of this application;

[0013] Figure 2 A side cross-sectional view of the present application;

[0014] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0015] Description of the numbers in the figure:

[0016] 1. Gasket body; 11. Main hole; 12. Keyway hole; 13. Bolt hole; 2. Guard ring; 3. Raised rib. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0018] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0020] Embodiment 1:

[0021] An embodiment of the present application discloses a composite sealing gasket, including a gasket body 1, which has a main hole 11, a keyway hole 12 and a bolt hole 13. The inner edge of the main hole 11 is covered with a protective ring 2 made of a metal material. The front and back sides of the gasket body 1 are fixedly connected with ribs 3 at the edges surrounding the main hole 11, the keyway hole 12 and the bolt hole 13. The ribs 3 located at each hole position are connected to each other, and the ribs 3 located at the edge of the main hole 11 are located on the periphery of the protective ring 2.

[0022] Preferably, the convex rib 3 is made of graphite and can be fixed to the gasket body 1 by gluing, pressing or die-casting. The width of the convex rib 3 is greater than or equal to the width of the retaining ring 2 .

[0023] Preferably, the thickness of one side of the rib 3 is 0.4 mm.

[0024] The implementation principle of a composite sealing gasket in the embodiment of the present application is as follows: the present application only uses a metal guard ring 2 to wrap the edge of the main hole 11, and then sets convex ribs 3 on the periphery of the metal guard ring 2, the edge of the bolt hole 13, the edge of the keyway hole 12 and other special-shaped holes, which can effectively share the plane pressure borne by the guard ring 2 position, reduce the leakage risk of the remaining holes, and have low process difficulty, high production efficiency, and are more suitable for product assembly applications. Compared with the traditional method of wrapping the guard ring on the edge of the special-shaped hole at the same time, the production efficiency can be increased by 50%; different convex rib 3 structures can be presented according to needs, which is very suitable for product assembly applications, while the traditional metal guard ring is more suitable for processing except for the circular structure, and other special structures are more complicated to process.

[0025] Embodiment 2:

[0026] An embodiment of the present application discloses a composite sealing gasket, including a gasket body 1, which has a main hole 11, a keyway hole 12 and a bolt hole 13. The inner edge of the main hole 11 is covered with a protective ring 2 made of a metal material. The front and back sides of the gasket body 1 are fixedly connected with ribs 3 at the edges surrounding the main hole 11, the keyway hole 12 and the bolt hole 13. The ribs 3 located at each hole position are connected to each other, and the ribs 3 located at the edge of the main hole 11 are located on the periphery of the protective ring 2.

[0027] Preferably, the convex rib 3 is a silicone wire, which is fixed to the gasket body 1 by silk-screen printing.

[0028] Preferably, the thickness of one side of the rib 3 is 0.2 mm.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A composite sealing gasket, comprising a gasket body (1), wherein the gasket body (1) has a main hole (11), a keyway hole (12) and a bolt hole (13), characterized in that: The inner edge of the main hole (11) is covered with a metal guard ring (2), and convex ribs (3) are fixedly connected at the edges of the front and back sides of the gasket body (1) surrounding the main hole (11), the keyway hole (12) and the bolt hole (13). The convex ribs (3) located at each hole position are connected to each other, and the convex ribs (3) located at the edge of the main hole (11) are located on the periphery of the guard ring (2).

2. The composite sealing gasket according to claim 1, characterized in that: The convex rib (3) is made of graphite and is fixed to the gasket body (1) by gluing or pressing.

3. The composite sealing gasket according to claim 2, characterized in that: The width of the convex rib is not less than the width of the retaining ring (2).

4. The composite sealing gasket according to claim 1, characterized in that: The convex rib (3) is a silicone wire and is fixed to the gasket body (1) by silk-screen printing.

5. The composite sealing gasket according to claim 2 or 4, characterized in that: The thickness of one side of the convex rib (3) is 0.1-0.5 mm.

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