High-pressure-resistant metal spiral wound gasket structure

Abstract

The utility model discloses a high pressure resistant metal spiral wound gasket structure which comprises an inner ring, a winding ring and an outer ring, the side face of the inner ring is fixedly connected with the inner side face of the winding ring, and the side face of the winding ring is fixedly connected with the inner side face of the outer ring. The inner ring comprises a first ring piece and a second ring piece, and the contact part of the outer side of the first ring piece and the contact part of the outer side of the second ring piece are fixedly connected through high-strength welding. The inner side of the first ring piece and the inner side of the second ring piece can be automatically separated under the action of high pressure and make contact with flanges on the two sides to achieve the self-sealing effect, the winding ring is matched, the sealing performance can be improved, and the leakage rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal spiral wound gaskets, in particular to a high-pressure resistant metal spiral wound gasket structure. Background Art

[0002] Metal spiral wound gaskets are a widely used sealing gasket with the best resilience among semi-metallic sealing gaskets. They are made of high-quality SUS304, SUS316 "V" or "W" shaped metal strips and other alloy materials and graphite, mica, polytetrafluoroethylene, non-asbestos and other soft materials that are alternately overlapped and spirally wound. Metal spiral wound gaskets are subject to gasket processing technology and the structural characteristics of the current metal spiral wound gaskets themselves. There has been no good solution for sealing Class 600 (PN110) and above pressure levels, such as Figure 1 As shown, the existing high-pressure metal wound gasket consists of a metal inner ring-3, a winding part-2, and a metal outer ring-1. The sealing of the metal wound gasket relies more on the winding part 2 of the wound gasket. When facing high pressure, leakage often occurs due to insufficient strength of the winding part 2. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model discloses a high-pressure resistant metal wound gasket structure, which adopts the technical solution of comprising an inner ring, a winding ring and an outer ring, the side surface of the inner ring being fixedly connected to the inner side surface of the winding ring, and the side surface of the winding ring being fixedly connected to the inner side surface of the outer ring; the inner ring comprises a first ring piece and a second ring piece, and the contact parts of the outer side of the first ring piece and the outer side of the second ring piece are fixedly connected by high-strength welding.

[0004] As a preferred technical solution of the utility model, the inner contact parts of the first ring piece and the second ring piece are both provided with cutouts, and the angle of the cutouts at the inner contact parts of the first ring piece and the second ring piece is 90 degrees.

[0005] The beneficial effects of the utility model are as follows: the utility model changes the inner ring structure and improves the inner ring into a structure formed by high-strength welding of an integrally formed first ring piece and a second ring piece, so that the inner sides of the first ring piece and the second ring piece can separate themselves under the action of high pressure and contact with the flanges on both sides to achieve a self-sealing effect, and cooperate with the winding ring to improve the sealing performance and reduce the leakage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the structure of an existing metal spiral wound gasket;

[0007] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0008] Figure 3This is a schematic diagram of the cross-sectional structure of the inner ring of the utility model;

[0009] Figure 4 This is a schematic diagram of the installation cross-sectional structure of the utility model.

[0010] In the figure: 1 metal outer ring, 2 winding part, 3 metal inner ring, 4 inner ring, 41 first ring piece, 42 second ring piece, 5 winding ring, 6 outer ring. DETAILED DESCRIPTION

[0011] Example 1

[0012] like Figures 2 to 3 As shown, the utility model discloses a high-pressure resistant metal spiral wound gasket structure, which adopts a technical solution comprising an inner ring 4, a spiral wound ring 5 and an outer ring 6, wherein the side surface of the inner ring 4 is fixedly connected to the inner side surface of the spiral wound ring 5, and the side surface of the spiral wound ring 5 is fixedly connected to the inner side surface of the outer ring 6;

[0013] The inner ring 4 includes a first ring piece 41 and a second ring piece 42. The contact parts of the outer side of the first ring piece 41 and the outer side of the second ring piece 42 are fixedly connected by high-strength welding. The inner contact parts of the first ring piece 41 and the second ring piece 42 are both provided with notches. The angle of the notches at the inner contact parts of the first ring piece 41 and the second ring piece 42 is 90 degrees. By changing the structure of the inner ring 4, the inner ring 4 is improved into a structure formed by high-strength welding of the integrally formed first ring piece 41 and the second ring piece 42, so that the first ring piece 41 and the second ring piece 42 can separate themselves under the action of high pressure, and contact with the flanges on both sides to achieve a self-sealing effect. In combination with the winding ring, the sealing performance can be improved and the leakage rate can be reduced.

[0014] The working principle of the utility model is as follows: Figure 4 As shown, the metal gasket is installed between the equipment flanges and fastened by fasteners. When the medium pressure in the equipment is relatively high, the medium pressure will enter between the first ring piece 41 and the second ring piece 42 from the cutouts on the inner sides of the first ring piece 41 and the second ring piece 42. The medium pressure will separate the inner sides of the first ring piece 41 and the second ring piece 42, so that the inner sides of the first ring piece 41 and the second ring piece 42 are in close contact with the flanges on both sides, and a first seal is established with the sealing surface, thereby improving the sealing performance of the metal spiral wound gasket and preventing leakage due to excessive medium pressure.

[0015] Components not described in detail herein are prior art.

[0016] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention, and modifications or deformations without creative labor are still within the scope of protection of the present invention.

Claims

1. A high pressure resistant metal spiral wound gasket structure, characterized in that: It comprises an inner ring (4), a winding ring (5) and an outer ring (6), wherein the side surface of the inner ring (4) is fixedly connected to the inner side surface of the winding ring (5), and the side surface of the winding ring (5) is fixedly connected to the inner side surface of the outer ring (6); The inner ring (4) comprises a first ring piece (41) and a second ring piece (42), and the contact portions of the outer side of the first ring piece (41) and the outer side of the second ring piece (42) are fixedly connected by high-strength welding.

2. A high pressure resistant metal spiral wound gasket structure according to claim 1, characterized in that: The inner contact parts of the first ring piece (41) and the second ring piece (42) are both provided with cutouts, and the angle of the cutouts at the inner contact parts of the first ring piece (41) and the second ring piece (42) is 90 degrees.

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