CN205991262U - Gas exhaust piping sealing device - Google Patents

Abstract

The utility model relates to the field of engine exhaust pipes, in particular to an exhaust pipeline sealing device. The technical problem of low sealing performance of the traditional exhaust pipe sealing device is solved. The exhaust pipeline sealing device includes a flange II, and a groove is opened on the flange II, and a gasket is installed in the groove, and the flange II and the flange I are matched and connected and fixed together; the gasket includes graphite plates, a metal skeleton is arranged between the graphite plates, and the inner ring and/or the outer surface of the outer ring of the graphite plates are coated with metal edging. The exhaust pipeline sealing device has high sealing performance, high strength and long service life, simple structure, easy processing and convenient use.

Description

Exhaust line seal

technical field

The utility model relates to the field of engine exhaust pipes, in particular to an exhaust pipeline sealing device.

Background technique

With the upgrading of emission requirements, regeneration technology is required for engine aftertreatment. A commonly used active regeneration technology is to inject fuel into the exhaust pipe to increase the reaction temperature in the catalytic muffler, thereby removing particles. Fuel is injected into the pipe, so higher requirements are put forward for the sealing of the joint between the exhaust pipe and the catalytic muffler to ensure that the fuel and exhaust gas do not leak and avoid unsafe factors. For the clamp connection, the connection between the exhaust pipe and the catalytic muffler is sealed with a metal gasket, which has low sealing performance and cannot meet such high sealing requirements.

Utility model content

Based on the deficiencies of the prior art above, the technical problem to be solved by this utility model is: to provide an exhaust pipeline sealing device, which has high sealing performance, high strength, long service life, simple structure, easy processing and convenient use.

The utility model is achieved through the following technical solutions: an exhaust pipeline sealing device, including flange II, a groove is opened on the flange II, a gasket is installed in the groove, flange II and flange I Matched and connected and fixed together, no groove is provided on the flange I, and the mating end face of the flange I is a plane. The gasket includes graphite plates, a metal skeleton is arranged between the graphite plates, and the metal skeleton provides support for the graphite plates, which can increase the strength of the gasket, and the inner ring and/or outer surface of the graphite plate is coated with Metal edging, metal edging can prevent the graphite plate from scattering or falling slag, make the cooperation between the graphite plate and the metal skeleton more tight, increase the strength of the gasket, and prolong the service life. The graphite plate is a flexible graphite composite gasket.

The depth of the groove is smaller than the thickness of the gasket. After the flange II and the flange I are fixed together, the gasket will be compressed and deformed, which can improve the sealing performance and reduce the surface roughness of the gasket. Requirements, reduce processing costs.

The metal skeleton is provided with sprints, and the shape of the sprints can be trapezoidal, conical, square, etc., so as to ensure that there is no relative sliding between the graphite plate and the metal skeleton, and the cooperation is more firm.

The flange I is welded on the exhaust pipe I, and the flange II is welded on the exhaust pipe II. Corresponding flanges, gaskets and clamps can be used according to exhaust pipes of different diameters to improve the adaptability of the device. .

The flange I and the flange II are fixed together through a clamp connection. The clamping faces of the clamp, flange I and flange II are beveled. The clamp can be a single clamp or a segmented combined clamp.

The flange I and the flange II are fixed together by bolts, and the flanges are provided with through holes.

The beneficial effects of the utility model are:

(1) There is a groove on the flange II of the exhaust pipe sealing device, the depth of the groove is smaller than the thickness of the gasket, and the matching section of the flange I is flat, and the gasket is squeezed after the device is installed. Compression deformation, so as to realize the sealing of the exhaust pipe, greatly improving the sealing performance.

(2) The compression deformation of the gasket is used for sealing, which can reduce the surface roughness requirements of the gasket and reduce the processing cost.

(3) The flexible graphite composite gasket with metal skeleton and metal edging is used, which has good corrosion resistance, high/low temperature resistance and good compression resilience, and further improves the sealing performance of the device. The metal skeleton provides graphite plates. The support can increase the strength of the gasket, and the metal edging can prevent the graphite plate from being scattered or slag, so that the cooperation between the graphite plate and the metal skeleton is more tight, the strength of the gasket is increased, and the service life is extended.

(4) The flange and the exhaust pipe adopt a split design, and the corresponding flanges, gaskets and clamps are used according to the exhaust pipes of different diameters to improve the adaptability of the device.

Description of drawings

Fig. 1 is an exploded view of the utility model;

Fig. 2 is a partial sectional view of the utility model;

Fig. 3 is a sectional view of the gasket.

In the figure: 1. Exhaust pipe I; 2. Flange I; 3. Clamp; 4. Gasket; 41. Graphite plate; 42. Metal skeleton; 421. Sprint; 43. Metal wrapping; 5. Flange II; 51, groove; 6, exhaust pipe II.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described:

Embodiment one

As shown in Figures 1 to 3, the exhaust pipeline sealing device described in the utility model includes a flange II5, and a groove 51 is opened on the flange II5, and a gasket 4 is installed in the groove 51, and the flange II5 and the The flange I2 is matched and connected and fixed together, the groove 51 is not provided on the flange I2, and the mating end surface of the flange I2 is a plane. The gasket 4 includes a graphite plate 41, and a metal skeleton 42 is arranged between the graphite plates 41. The metal skeleton 42 provides support for the graphite plate 41, which can increase the strength of the gasket 4. The inner ring of the graphite plate 41 and/or The outer surface of the outer ring is coated with metal edging 43, which can prevent the graphite plate 41 from being scattered or slag-dropped, so that the cooperation between the graphite plate 41 and the metal frame 42 can be tightened, the strength of the gasket 4 can be increased, and the service life can be extended. life. The graphite plate 41 is a flexible graphite composite gasket.

The depth of the groove 51 is smaller than the thickness of the gasket 4. After the flange II5 and the flange I2 are fixed together, the gasket 4 will be compressed and deformed, which can improve the sealing performance and reduce the pressure on the gasket 4. Surface roughness requirements, reduce processing costs.

The metal frame 42 is provided with a sprint 421, which can be trapezoidal, conical, square, etc. in shape to ensure that there is no relative sliding between the graphite plate 41 and the metal frame 42, and the cooperation is more firm.

The flange I2 is welded on the exhaust pipe I1, and the flange II5 is welded on the exhaust pipe II6. The corresponding flanges, gaskets 4 and clamps 3 can be used according to the exhaust pipes of different diameters, and the device can be improved. adaptability.

The flange I2 and the flange II5 are connected and fixed together through the clamp 3 . The clamping surfaces of clamp 3, flange I2 and flange II5 are all inclined surfaces. The clamp 3 can be a single clamp or a segmented combined clamp.

Embodiment two

The flange I2 and the flange II5 are fixed together by bolts, and the flanges are provided with through holes. Others are described in the first embodiment.

Of course, the above content is only a preferred embodiment of the present utility model, and cannot be considered as limiting the scope of embodiments of the present utility model. The utility model is not limited to the above-mentioned examples, and equal changes and improvements made by those skilled in the art within the essential scope of the utility model shall all belong to the scope covered by the patent of the utility model.

Claims (6)

1. An exhaust pipeline sealing device, characterized in that: it includes a flange II (5), a groove (51) is opened on the flange II (5), and a gasket (4) is installed in the groove (51) ), flange II (5) is matched with flange I (2) and connected and fixed together; the gasket (4) includes a graphite plate (41), and a metal skeleton (42) is arranged between the graphite plate (41) ), the inner ring and/or outer ring outer surface of the graphite plate (41) is coated with metal edging (43). 2. The exhaust pipe sealing device according to claim 1, characterized in that: the depth of the groove (51) is smaller than the thickness of the gasket (4). 3. The exhaust pipe sealing device according to claim 1, characterized in that: the metal frame (42) is provided with a punch (421). 4. The exhaust pipeline sealing device according to claim 1, 2 or 3, characterized in that: the flange I (2) is welded on the exhaust pipe I (1), and the flange II (5) Welded on exhaust pipe II(6). 5. The exhaust pipe sealing device according to claim 4, characterized in that: said flange I (2) and flange II (5) are connected and fixed together by a clamp (3). 6. The exhaust pipe sealing device according to claim 4, characterized in that: said flange I (2) and flange II (5) are fixed together by bolts.