Exhaust pipe gasket structure capable of improving slippage

Abstract

The utility model discloses an exhaust pipe gasket structure capable of improving slippage, which relates to the technical field of gaskets and comprises a gasket connected between an exhaust pipe and a cylinder cover. Wherein the gasket comprises an inner gasket with a convex rib, the two sides of the inner gasket are respectively connected with an outer gasket, and the inner gasket is respectively attached to the exhaust pipe and the cylinder cover through the two outer gaskets. According to the exhaust pipe gasket structure capable of improving slippage, the outer gaskets are arranged on the two sides of an existing exhaust pipe gasket respectively and wrap the protruding ribs, so that the protruding ribs are located inside and attached to an exhaust pipe flange and a cylinder cover through the outer gaskets respectively, and therefore the sliding performance of the exhaust pipe gasket structure is improved. The technical problem that an existing exhaust pipe gasket is prone to deformation in the temperature changing process, and consequently air leakage of an exhaust pipe is caused is effectively solved, then effective sealing of an exhaust pipe flange and a cylinder cover is achieved, the phenomenon that the gasket slides due to back-and-forth deformation of the flange is reduced, and therefore the stability of the gasket in the using process is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gaskets, and particularly relates to an exhaust pipe gasket structure for improving slip. Background Art

[0002] When the engine is working, the high-temperature exhaust gas discharged from the combustion chamber will contact the gasket, causing the surface temperature of the exhaust pipe gasket to rise sharply. In order to ensure the normal operation and safety of the engine, prevent the high-temperature gas leaked from damaging other components of the engine and the harm that high temperature may cause to the human body, the exhaust pipe gasket is commonly optimized to solve the leakage problem caused by the poor sealing between the exhaust pipe and its cylinder head. However, the existing gaskets may have structural defects such as welding misalignment and warping deformation. In addition, the gasket has poor resilience after being heated, which also affects the sealing effect of the gasket.

[0003] At present, a Chinese patent with the publication number of CN201810417U discloses an exhaust pipe gasket. The gasket is in an overall shape of a "hui" character. The gasket is symmetrically formed by welding four single-layer gaskets with the same thickness. There are outwardly convex arc-shaped cavities at the corresponding positions between the middle two layers of gaskets and the sealing surfaces of the cylinder head and the exhaust pipe, so that a flange is formed on the outer surface of the gasket. The single-layer gasket is a stainless steel gasket with a thickness of 0.1 mm. The height of the formed flange is 0.6 ± 0.03 mm. The welding points of the single-layer gaskets are four, symmetrically arranged in pairs. Two of the welding point positions are at the intersection of the vertical center line of the "hui"-shaped gasket and the center line connecting the corresponding side bolt mounting holes; the other two welding point positions are on the horizontal center line of the "hui"-shaped gasket and are located inside the outer edge of the gasket. The exhaust pipe gasket can effectively improve the deformation amount of the gasket, has a better sealing effect, and can effectively solve the problem of gasket ablation caused by high temperature.

[0004] However, during the implementation of the above technical solution, it is found that there are at least the following technical problems:

[0005] The gasket is prone to deformation during the temperature change process, resulting in air leakage of the exhaust pipe: The existing exhaust pipe gaskets mainly adopt the form of convex ribs on the outside, resulting in the convex ribs directly contacting the exhaust pipe flange. During the operation of the engine, the exhaust pipe flange deforms repeatedly under normal temperature and high temperature conditions, rubbing the convex ribs on the exhaust pipe gasket back and forth, causing the exhaust pipe gasket to slip and deform, resulting in air leakage at the joint between the exhaust pipe flange and the cylinder head; secondly, after long-term friction, the convex ribs will also be worn to varying degrees, affecting their service life. For this reason, we propose an exhaust pipe gasket structure for improving slip. Content of the Utility Model

[0006] (I) Technical Problems to be Solved

[0007] In view of the deficiencies in the prior art, the utility model provides an exhaust pipe gasket structure with improved slippage. An outer gasket is arranged on each side of the existing exhaust pipe gasket to wrap the convex rib so that the convex rib is inside, and the outer gasket is respectively fitted with the exhaust pipe flange and the cylinder head, thereby achieving effective sealing of the exhaust pipe flange and the cylinder head, reducing the slippage of the gasket caused by the back-and-forth deformation of the flange, thereby ensuring the stability of the gasket during use, and solving the technical problem that the existing exhaust pipe gasket is prone to deformation during temperature changes, resulting in exhaust pipe leakage.

[0008] (II) Technical solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] An exhaust pipe gasket structure with improved sliding, the exhaust pipe gasket structure comprising:

[0011] Gasket connected between exhaust pipe and cylinder head;

[0012] Wherein, the gasket comprises an inner gasket with convex ribs, and an outer gasket is connected to each side of the inner gasket, and the inner gasket is respectively fitted with the exhaust pipe and the cylinder head through the two outer gaskets.

[0013] Preferably, the convex ribs on the inner pad are formed by stamping.

[0014] Preferably, the gasket is composed of two inner pads with convex ribs, the two inner pads are attached to each other and connected together, and the convex ribs on the inner pads are convex outwards and the directions of the convex ribs are away from each other.

[0015] Preferably, the outer pad is connected to the convex rib outside the inner pad, and the two outer pads are respectively fitted with the exhaust pipe and the cylinder head to avoid two outer pads.

[0016] (III) Beneficial effects

[0017] An outer gasket is arranged on each side of the existing exhaust pipe gasket to wrap the convex rib so that the convex rib is inside, and the outer gasket is used to fit the exhaust pipe flange and the cylinder head respectively. Therefore, the technical problem that the existing exhaust pipe gasket is prone to deformation during temperature changes, resulting in exhaust pipe leakage, is effectively solved, thereby achieving effective sealing of the exhaust pipe flange and the cylinder head, reducing the slip of the gasket caused by the back-and-forth deformation of the flange, thereby ensuring the stability of the gasket during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0019] Figure 1 This is an overall structural diagram of an embodiment of the utility model;

[0020] Figure 2 This is an exploded structural diagram of a gasket in an embodiment of the utility model;

[0021] Figure 3 It is a partial cross-sectional view of the gasket in the embodiment of the utility model;

[0022] Figure 4 This is a diagram showing the use status of the gasket in the embodiment of the utility model;

[0023] Figure 5 It is an exploded view of the practical state of the gasket in the embodiment of the utility model.

[0024] Legend: 1. Gasket; 11. Inner gasket; 12. Rib; 13. Outer gasket; 2. Exhaust pipe; 3. Cylinder head. DETAILED DESCRIPTION

[0025] The embodiment of the present application provides an exhaust pipe gasket structure with improved slippage, which effectively solves the technical problem that the existing exhaust pipe gasket is prone to deformation during temperature changes, resulting in exhaust pipe leakage. An outer gasket is arranged on each side of the existing exhaust pipe gasket to wrap the rib so that the rib is inside, and the outer gasket is respectively fitted with the exhaust pipe flange and the cylinder head, thereby achieving protection for the rib and reducing the slip of the gasket caused by the back-and-forth deformation of the flange, thereby ensuring the stability of the gasket during use.

[0026] The technical solution in the embodiment of the present application effectively solves the technical problem that the existing exhaust pipe gasket is prone to deformation during temperature changes, resulting in exhaust pipe leakage. The overall idea is as follows:

[0027] In view of the problems existing in the prior art, the utility model provides an exhaust pipe gasket structure with improved slippage, the exhaust pipe gasket structure comprises a gasket 1 connected between an exhaust pipe 2 and a cylinder head 3, such as Figure 5 As shown, bolt holes and vent holes corresponding to the exhaust pipe 2 are opened on the gasket 1, and when in use, it is clamped between the exhaust pipe 2 and the cylinder head 3.

[0028] The gasket 1 is composed of two inner gaskets 11 with convex ribs 12, and the two inner gaskets 11 are attached to each other and connected together, and the convex ribs 12 on the inner gaskets 11 are convex outward, and the directions of the convex ribs are away from each other. The main improvement of the present application is that an outer gasket 13 is arranged on the outer side of each of the original two inner gaskets 11, and the outer gasket 13 is connected to the convex ribs 12 on the outside of the inner gasket 11. When the gasket 1 is used, the two outer gaskets 13 are respectively attached to the exhaust pipe 2 and the cylinder head 3 to avoid the two outer gaskets 13, thereby realizing the protection of the convex ribs 12 and reducing the slip of the gasket 1 caused by the back-and-forth deformation of the flange, thereby ensuring the stability of the gasket 1 during use.

[0029] The ribs 12 on the inner pad 11 are formed by stamping.

[0030] In the specific implementation process, the gasket 1 is installed between the exhaust pipe 2 and the cylinder head 3. Figure 4 and Figure 5 As shown in the figure, it can be seen that the inner pad 11 at the center of the gasket 1 is wrapped by two outer pads 13, so that the inner pad 11 in the middle is protected. Therefore, during the operation of the engine, even if the flange of the exhaust pipe 2 is repeatedly deformed under normal temperature and high temperature conditions, it is only the outer pad 13 on the outside of the rib 12 that is rubbed back and forth, and the rib 12 on the inner pad 11 will not be affected. In this way, there will be no wear, leakage, etc., thereby ensuring the service life of the gasket 1.

[0031] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An exhaust pipe gasket structure for improving slippage, characterized in that: The exhaust pipe gasket structure comprises: A gasket (1) connected between the exhaust pipe (2) and the cylinder head (3); The gasket (1) comprises an inner gasket (11) with convex ribs (12), and an outer gasket (13) is connected to each side of the inner gasket (11), and the inner gasket (11) is respectively fitted to the exhaust pipe (2) and the cylinder head (3) via the two outer gaskets (13).

2. An exhaust pipe gasket structure with improved sliding according to claim 1, characterized in that: The convex rib (12) on the inner pad (11) is formed by stamping.

3. The exhaust pipe gasket structure with improved sliding according to claim 1, characterized in that: The inner pads (11) are provided in two groups, and the two groups of inner pads (11) fit each other, with the convex ribs (12) thereon convex outwards.

4. The exhaust pipe gasket structure with improved sliding according to claim 1, characterized in that: The outer pad (13) is connected to the convex rib (12) outside the inner pad (11).

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