KR19980058566U - Gaskets and flanges for automotive exhaust systems - Google Patents

Abstract

The present invention relates to a gasket and a flange of an automobile exhaust system which further improves the gastightness of the automobile gasket and the flange. The technical gist of the present invention is to provide airtightness between the catalyst flange 51 and the exhaust pipe flange 52. The gasket 60 which is installed to be maintained is a primary sealing portion 63 in which an iron grommet portion 62 is installed at one end of the sheet portion 70, and the grommet portion 62 is a gasket 60. The secondary sealing portion 64 which is integrally extended to the outside of the side and protrudes upwards and downwards on both sides thereof, and below the integrally extending grommet portion 62. The bead steel plate 65 is provided with the tertiary sealing part 67 which is installed in combination with the reinforcement plate 66, and the step part T and the groove part 71 are formed in the exhaust flange 62, respectively. It is characterized in that the configuration.

Accordingly, the gastight having a tertiary sealing structure is perfectly maintained of the high airtightness of the exhaust system, and the surface pressure of the gasket can be easily adjusted due to the step formed in the flange, while the sheet part is easily provided by the groove part. The installation of the bead steel sheet facilitates the adjustment of the surface pressure height, and at the same time, the vibration resistance is excellent, and the use of the non-asbestos sheet is reduced, thereby reducing the cost.

Description

Gaskets and flanges for automotive exhaust systems

The present invention relates to a gasket and a flange of an automobile exhaust system, which further improves the airtightness of the gasket which serves as a sealing material to prevent external leakage of the exhaust gas in the flange that is a connection port of the exhaust pipe of the automobile. In detail, the gas flange which is installed so that the catalyst flange and the exhaust pipe flange of the automobile exhaust system form a plane and maintains airtightness between the catalyst flange and the exhaust pipe flange is one side of the sheet portion where the non-asbestos sheet is overlapped. A first sealing portion in which an iron grommet part is installed at an end, a secondary sealing part in which the grommet part is integrally extended to the outside of the gasket to protrude an elastic part, and a bead steel sheet below the integrally extending grommet part. It is provided with a tertiary sealing part installed in conjunction with this reinforcing plate, and has a step and a As the groove portion is formed, the gas seal having the third sealing structure effectively maintains the high airtightness of the vehicle exhaust system, and minimizes fluctuations in the exhaust gas due to leakage of the exhaust system, and also purifies the exhaust gas. Exhaust system for automobiles, which extends the life of phosphorus catalyst, facilitates the surface pressure adjustment of the gasket and the installation of the sheet part, excellent vibration resistance to the exhaust gas, and the cost reduction by reducing the use of the gasket sheet part. Relates to gaskets and flanges.

BACKGROUND ART [0002] In general, automobile gaskets, in particular, gas gaskets used in exhaust systems of automobiles, are made of steel grommet at one end of the gasket sheet portion manufactured by forming a dense sheet by mixing heat-resistant fibers containing a binder and heating and pressing them. The mat is installed in order to maintain the airtightness of the vibration, high temperature, high pressure, while the airtightness such as exhaust manifold of the vehicle is required.

In the conventional known car exhaust system gasket, as shown in FIG. 1, the automobile exhaust system catalyst flange 1 and the exhaust pipe flange 2 form a plane, and the catalyst flange 1 and A gasket 20 is installed between the flanges 2 of the exhaust pipe, and the gasket 20 has a steel grommet portion 13 at one end of the sheet portion 11 on which the non-asbestos sheet 12 is overlapped. A seal made of the sheet portion 11 and the grommet portion 13 is installed when the catalyst flange 1 and the exhaust pipe flange 2 are fixedly fixed through the fastening holes 3. The ring portion 10 has a structure in which the flanges 1 and 2 are tightly sealed.

In the conventional automobile exhaust flange gasket having the above-described structure, as shown in FIG. 1, it is installed between the exhaust system flanges 1 and 2 of the automobile to maintain airtightness.

However, in the conventional car exhaust gasket as described above, as shown in Fig. 1, the steel grommet 12 is simply provided on one side of the gasket sheet portion 11 in which the non-asbestos sheet 12, which is a fibrous sheet, is overlapped. ), It is difficult to maintain the high gas tightness, which is the life of the gas ket, and it is not possible to maintain thorough airtightness especially at the parts requiring vibration resistance, high temperature, and high pressure, and foreign matter easily enters the exhaust system of automobiles, especially oxygen As a result, there were various problems such as being in conflict with the regulation of exhaust gas.

The present invention has been devised to improve the above-mentioned various problems, and its purpose is to maintain the airtightness of the automobile exhaust system efficiently due to the gas casing having the third sealing structure, Minimize fluctuations in the exhaust gas caused by the gas, satisfying the exhaust gas regulations by minimizing the inflow of oxygen, extending the life of the catalyst, which is a purification device of the exhaust gas, and adjusting the surface pressure of the gasket and installing the sheet part. In addition, the present invention is to provide a gasket and a flange of an automobile exhaust system, which is excellent in vibration resistance against vibration of exhaust gases and automobiles, and the cost of which is reduced by using a gas sheet.

As a technical means for achieving the above object, the present invention, the catalyst flange and the exhaust pipe flange of the automobile exhaust system to form a plane, the automobile is installed so as to maintain the airtight between the catalyst flange and the exhaust pipe flange In the gas gasket and flange of the exhaust system, the gasket includes a primary sealing portion in which an iron grommet portion is installed at one end of the sheet portion on which the non-asbestos sheet is overlapped, and the grommet portion is integrally extended to the outside of the gasket. A secondary sealing portion in which elastic pieces protrude upward and downward on both sides, and a tertiary sealing portion in which a bead steel plate is installed in combination with a reinforcing plate under the integrally extending grommet portion, the end of the gasket The seat portion is unmounted on the part, and the sheet part is easily installed inside the exhaust pipe flange, and the surface pressure, A step is formed to facilitate adjustment, and the inside of the step is provided with a gasket and a flange of the exhaust system for an automobile, which has a structure in which a groove part is formed to prevent interference between the sheet part and the flange.

1 is a cross-sectional view showing a coupling structure of a conventional gas exhaust for automobile exhaust system

Figure 2 is a partial cross-sectional view showing a gasket and a flange of the exhaust system for automobiles according to the present invention

Figure 3 is a detail view of the main part of Figure 2 'A' showing the gasket and flange of the exhaust system for automobiles of the present invention

4 is a detailed view of the main portion of Fig. 2 'B' showing a gasket and a flange of the exhaust system for automobiles of the present invention;

* Description of the symbols for the main parts of the drawings *

51: catalyst flange 52: exhaust pipe flange

60: gasket 61: non-asbestos sheet

62: Gromat part 63: 1st sealing part

64: secondary sealing part 65: bead steel sheet

66: reinforcement plate 67: 3rd sealing part

68: end of the gasket 69, 59 ': elastic piece

70: sheet part 71: flange groove part

T: Flange Step

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a partial cross-sectional view showing a gasket and a flange of an automobile exhaust system according to the present invention, and FIG. 3 is a detailed view of the main part of FIG. 4 is a detailed view of the main part of Fig. 2 'B' showing the gas gasket and the flange of the automotive exhaust system of the present invention, the catalyst flange 51 and the exhaust pipe flange 52 of the automotive exhaust system is a plane, A gasket 60 is installed to maintain airtightness between the catalyst flange 51 and the exhaust pipe flange 52.

In addition, the gas grate 60 includes a primary execution ring 63 in which an iron grommet portion 62 is mounted at one end of the sheet portion 70 on which the non-asbestos sheet 61 is overlapped, and the grommet portion. Secondary sealing portion 64, which is integrally extended to the outer side of the gasket 60, and is formed with elastic pieces 69 and 69 'protruding upward and downward on both sides thereof, and the integrally extending portion. The bead steel plate 65 is provided with the tertiary sealing part 67 in which the bead steel plate 65 couples with the reinforcement board 66, and is installed below.

In the exhaust pipe flange 52, the sheet portion 70 of the gasket 60 located upward is easily mounted, and the dimensions are adjusted so that the surface pressure of the flange 52 can be easily adjusted. (T) is formed.

In addition, inside the step T of the flange 52 for the exhaust pipe, interference between the seat portion 70 of the gasket 60 and the flange 52 when the flange 52 and the gasket 60 are coupled to each other. The groove portion 71 is prevented in advance.

The non-asbestos sheet portion 61 of the sheet portion 70 is formed as short as possible to reduce the cost, the non-asbestos portion of the sheet portion 70 due to high heat during operation at the end portion 68 of the gasket 60. In order to prevent the sheet 61 from falling out as a powder, it is made of a structure to friction seol.

At this time, reference numeral 80 in the drawing is a bolt fastening hole.

Referring to the operation and effects of the present invention having the above structure as follows.

As shown in FIGS. 2 to 4, a gas gasket 60 is installed between the catalyst flange 51 and the exhaust pipe flange 52 of the automobile exhaust system, so that the flange 51 and the interior of the flange 51 and 52 are coupled together. While maintaining the high airtight to prevent external leakage of the vehicle exhaust gas of the car to withstand the vibration of the car working simultaneously with the high temperature exhaust gas, and maintain the high surface pressure.

At this time, the catalyst flange 51 and the exhaust pipe flange 52 is formed in a plane to be fixed as a bolt through the fastening hole 80, the coupling when the coupling between the flange (51, 52) 60) is closely snowed.

In addition, the gas grate 60 includes a primary sealing portion 63 in which an iron grommet portion 62 is mounted at one end of the sheet portion 70, and the grommet portion 62 is extended to an elastic piece. (69) (69 ') and the secondary sealing portion 64 is formed, and the bead steel plate 65 is installed in the lower side of the integrally extended grommet portion 62 and the reinforcing plate 66 The tertiary sealing part 67 is provided.

Therefore, the airtightness of the internal exhaust gas of the catalyst flange 51 and the exhaust pipe flange 52 as the primary sealing portion 63 of the gas stake 60 is maintained closely, and the secondary sealing portion 64 is maintained. When the flanges 51 and 52 are coupled by the extended grommet portion 62 of the < RTI ID = 0.0 > and < / RTI > protruding elastic pieces 69 and 69 ', the elastic pieces 69 and 69 of the grommet portion 62 ') Is pressed to generate a repelling force to tightly and firmly seal the gas gasket 60 installed between the flanges 51 and 52, and the bead steel plate 65 of the third sealing portion 67. And while the robustness of the grommet portion 62 is maintained by the reinforcing plate 66, the vibration by the exhaust gas is absorbed by the reinforcing plate 66 of the spring back form is excellent in vibration resistance, the reinforcing plate Adjusting the thickness of 66 makes it easier to adjust the surface pressure height of the cascade 60.

On the other hand, the step (T) is formed in the exhaust pipe flange 52 to the inside, the sheet portion 70 of the gasket 60 located on the upper side is installed in the inside so that the gasket 60 is To be more easily coupled to the flange 52, by adjusting the dimensions of the step (T) it is easy to adjust the surface pressure of the gasket (60).

In addition, the groove portion 71 is formed inside the step T of the exhaust pipe flange 52 so that interference between the sheet portion 61 and the flange 52 of the gasket 60 is prevented. do.

Subsequently, the sheet portion 70 in which the non-asbestos sheet 61 is overlapped is formed as short as possible to reduce the cost. When the non-expandable graphite non-asbestos is used, the non-expandable graphite non-asbestos is foamed while driving the vehicle. Maintaining high surface pressure of the gasket 60 is smooth, and when other non-asbestos sheets are used, they are not foamed, but the surface pressure is adjusted by initially adjusting the dimension of the step T.

On the other hand, even if the sheet portion 70 is not attached to the end portion 68 by the cask 60 having the third sealing portion, the airtightness of the caster 60 is firmly maintained and the cost is maintained. At the same time, the non-asbestos sheet 61 of the end portion 68 is easily powdered and eliminated by high heat.

As a result, as the cask 60 having the third sealing portions 63, 64 and 67, the airtightness of the catalyst flange 51 and the exhaust pipe flange 52 of the automobile exhaust system is more effectively maintained. Installation costs are reduced.

As described above, according to the gasket and the flange of the exhaust system for automobiles of the present invention, the high-gassing maintenance of the vehicle exhaust system is efficiently performed due to the casing having the third sealing structure, and the fluctuation of the exhaust gas due to the leakage of the exhaust system gas. At the same time, the oxygen inflow is minimized to satisfy the regulation of exhaust gas, to extend the life of the catalyst which is the purification device of the exhaust gas, to adjust the surface pressure of the gas gasket and to install the seat part easily, and to exhaust the exhaust gas and the automobile vibration. Vibration resistance is excellent, and the use of the gasket sheet portion is reduced, there is an excellent effect of reducing the cost.

Claims (1)

In the case where the catalyst flange 51 and the exhaust pipe flange 52 of the automobile exhaust system form a plane and are installed so as to maintain airtightness between the catalyst flange 51 and the exhaust pipe flange 52, The gasket 60 includes a primary sealing portion 63 in which an iron grommet portion 62 is mounted at one end of the sheet portion 70 on which the non-asbestos sheet 61 is overlapped, and the grommet portion 62. ) Is integrally extended to the outside of the gasket 60, the secondary sealing portion 64, the elastic pieces 69 (69 ') protruding upward and downward on both sides thereof, and the integrally extended grommet portion Below the 62, the bead steel plate 65 is provided with a tertiary sealing part 67, which is installed in engagement with the reinforcing plate 66, and the sheet portion (68) is provided at the end portion 68 of the gasket 60. 70) is uninstalled, and a step portion T is formed on the inside of the exhaust pipe flange 52 so as to easily install the seat portion 70 and adjust the surface pressure, and a sheet is formed inside the step T. A gasket and a platter of an automobile exhaust system, characterized in that the groove portion 71 is formed to prevent interference between the portion 70 and the flange 52. Support.