Conical metal seal assembly

Abstract

A conical metal sealing assembly includes an upper sealing ring and a lower sealing ring used in combination between the end of a conical pipe and a metal end cover. The upper end surface of the lower sealing ring is a smooth arc surface, and the lower half is conical. The lower half of the lower sealing ring is placed in the conical gap between the outer wall of the conical pipe and the inner wall of the conical flange for surface-contact sealing fit; the upper end surface of the upper sealing ring is a smooth arc surface, and the lower end surface is a flat surface. The upper sealing ring is laminated above the lower sealing ring for line-contact sealing fit, and the upper end surface of the upper sealing ring is in line-contact sealing fit with the lower end surface of the metal end cover. The structure of the present invention is reasonable. The upper and lower double sealing rings are used in combination, and multiple hard seals of line contact and surface contact are used, with high reliability, not easily leaking, wide adaptability, convenient to use, and significantly improving the sealing performance of special pipe openings such as conical pipes and conical flanges.

Description

[0001] Technical Field: The present invention relates to a seal used in the fields of industrial pipelines and the like.

[0002] Background Art: For the ports of industrial pipeline facilities, when they do not need to be connected, they are generally closed with a sealing end cap. The commonly used sealing structure is to arrange a sealing ring between the metal end cap and the pipeline flange. However, for some special pipeline openings, such as tapered pipeline and tapered flange, etc., special-shaped sealing rings must be used. Such sealing rings mostly adopt surface contact sealing, which requires high precision and strict specification matching, and is relatively easy to leak. Moreover, when the usual metal end caps are connected and used, generally bolts penetrate and press tightly. There is a large adjustment range for the distance and parallelism between the metal end cap and the pipeline flange. The adaptation range of the existing sealing rings is narrow, and multiple specifications need to be prepared, which is inconvenient for actual use and installation.

[0003] Summary of the Invention: Aiming at the deficiencies of the prior art, the present invention provides a conical metal sealing assembly with reasonable structure and reliable sealing.

[0004] The present invention includes an upper sealing ring and a lower sealing ring used in combination between the end of the tapered pipeline and the metal end cap. The upper end surface of the lower sealing ring is a smooth arc surface, and the lower half is conical. The lower half of the lower sealing ring is placed in the conical gap between the outer wall of the tapered pipeline and the inner wall of the tapered flange for surface contact sealing fit; the upper end surface of the upper sealing ring is a smooth arc surface, and the lower end surface is a plane. The upper sealing ring is stacked above the lower sealing ring for line contact sealing fit, and the upper end surface of the upper sealing ring and the lower end surface of the metal end cap are in line contact sealing fit.

[0005] Further, a ring groove adapted to the upper sealing ring is provided on the lower end surface of the metal end cap. The top surface of the ring groove is a plane and is in line contact sealing fit with the upper end surface of the upper sealing ring.

[0006] An annular cutout is provided at the inner edge of the end surface of the tapered flange. The lower part of the upper sealing ring is located within the range surrounded by the annular cutout.

[0007] The structure of the present invention is reasonable. The upper and lower double sealing rings are used in combination, and multiple hard seals of line contact and surface contact are used, with high reliability, not easy to leak, wide adaptation range, convenient to use, and significantly improving the sealing performance of special pipeline openings such as tapered pipelines and tapered flanges.

[0008] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0009] Brief Description of the Drawings: Figure 1 It is a main structural schematic diagram of the upper sealing ring.

[0010] Figure 2 It is Figure 1 The top view of

[0011] Figure 3It is a schematic diagram of the main structure of the lower sealing ring.

[0012] Figure 4 It is Figure 3 the bottom view of.

[0013] Figure 5 It is a schematic diagram of the usage state of the embodiment.

[0014] Figure 6 It is Figure 5 the enlarged schematic diagram of part A of.

[0015] Specific implementation manner: As Figures 1 to 5 shown, the upper sealing ring 1 and the lower sealing ring 2 are arranged and used in combination between the end of the tapered pipe 4 and the metal end cover 3. The upper end surface of the lower sealing ring 2 is a smooth arc surface, and the lower half is conical. The lower half of the lower sealing ring 2 is placed in the conical gap between the outer wall of the tapered pipe 4 and the inner wall of the tapered flange 5 for surface contact sealing fit. The upper end surface of the upper sealing ring 1 is a smooth arc surface, and the lower end surface is a flat surface. The upper sealing ring 1 is stacked above the lower sealing ring 2 for line contact sealing fit, and the upper end surface of the upper sealing ring 1 and the lower end surface of the metal end cover 3 are in line contact sealing fit.

[0016] During sealing use, there is line contact sealing between the upper sealing ring 1 and the metal end cover 3, line contact sealing between the upper sealing ring 1 and the lower sealing ring 2, and surface contact sealing between the lower sealing ring 2 and the outer wall of the tapered pipe 4 and the inner wall of the tapered flange 5, which is a multi-layer hard sealing structure with high reliability, not easy to leak, and good applicability.

[0017] As Figure 6 shown, in this embodiment, a ring groove 6 adapted to the upper sealing ring 1 is provided on the lower end surface of the metal end cover 3. The top surface of the ring groove 6 is a flat surface and is in line contact sealing fit with the upper end surface of the upper sealing ring 1. An annular notch 7 is provided at the inner edge of the end surface of the tapered flange 5. The lower part of the upper sealing ring 1 is located within the range surrounded by the annular notch 7. In this way, the positioning is accurate during assembly, the installation is convenient, and the sealing structure is more reasonable.

Claims

1. A conical metal sealing assembly, comprising an upper sealing ring and a lower sealing ring used in combination between the end of a conical pipe and a metal end cover, characterized in that: the upper end face of the lower sealing ring (2) is a smooth arc surface, and the lower half is conical. The lower half of the lower sealing ring (2) is placed in the conical gap between the outer wall of the conical pipe (4) and the inner wall of the conical flange (5) for surface contact sealing fit; the upper end face of the upper sealing ring (1) is a smooth arc surface, and the lower end face is a flat surface. The upper sealing ring (1) is stacked above the lower sealing ring (2) for line contact sealing fit, and the upper end face of the upper sealing ring (1) and the lower end face of the metal end cover (3) are in line contact sealing fit.

2. The conical metal seal assembly according to claim 1, characterized in that: A ring groove (6) adapted to the upper sealing ring (1) is provided on the lower end face of the metal end cover (3). The top surface of the ring groove (6) is a flat surface and is in line contact sealing fit with the upper end face of the upper sealing ring (1).

3. The tapered metal seal assembly according to claim 1 or 2, characterized in that: An annular cutout (7) is provided at the inner edge of the end face of the conical flange (5), and the lower part of the upper sealing ring (1) is located within the range surrounded by the annular cutout (7).

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