Double loop contact type anti-extrusion sealing washer

Abstract

The utility model provides a kind of double-ring line contact type anti-extrusion sealing washer, belong to sealing element technical field.It includes sealing ring annular body, sealing ring annular body is integrally formed by inner semicircular ring and outer semicircular ring by connecting structure;Between the circular surface outside of inner semicircular ring and the circular surface inside of outer semicircular ring, both sides are connected by annular arc recess transition from top to bottom.A circular-arc convex ring is provided in the middle of annular arc recess.The utility model changes the traditional face seal into line seal by double-ring structure, reduces the pressure area, improves unit area sealing pressure, effectively prevents medium leakage.Meanwhile, the design of annular arc recess and circular-arc convex ring can provide elastic compensation when under pressure, prevent washer extrusion, maintain sealing stability.The formation of auxiliary sealing line further improves sealing reliability, especially suitable for high pressure, high temperature or corrosive medium environment.

Description

Technical Field

[0001] This utility model belongs to the field of sealing element technology, specifically relating to a double-ring line contact anti-extrusion sealing gasket. Background Technology

[0002] Most existing sealing gaskets are flat ring structures that rely on planar contact to achieve a seal (i.e., surface sealing). This structure is prone to extrusion deformation and gasket displacement under pressure after assembly, leading to a decrease in tightening torque and seal failure. Furthermore, due to the large pressure-bearing area, the sealing pressure per unit area (surface pressure) decreases, making leakage more likely. In addition, these types of sealing gaskets are prone to torque decay during long-term use, requiring frequent retightening, increasing maintenance costs and operational risks.

[0003] Therefore, there is an urgent need for a new type of sealing structure that can improve sealing performance, reduce extrusion risk, lower tightening torque requirements, and improve the stability and service life of the seal. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a double-ring line contact anti-extrusion sealing gasket. This utility model effectively solves the problems of easy extrusion, easy leakage, and large torque attenuation of existing sealing gaskets through the double-ring structure and line sealing method.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A double-ring line contact type anti-extrusion sealing gasket includes a sealing ring annular body, wherein the sealing ring annular body is integrally formed by an inner semi-circular ring and an outer semi-circular ring through a connecting structure; the outer side of the annular surface of the inner semi-circular ring and the inner side of the annular surface of the outer semi-circular ring are connected by annular arc recesses on both the upper and lower sides.

[0006] As a further limitation of the above scheme, the central part of the annular arc recess is provided with an arc convex ring.

[0007] As a further limitation of the above scheme, the highest point of the arc-shaped convex ring is lower than the highest points of the arcs of the inner and outer semicircular rings.

[0008] As a further limitation of the above scheme, the cross-sections of both the inner and outer semicircular rings are circular.

[0009] As a further limitation of the above scheme, the sealing ring annular body is made of an elastic material.

[0010] Further specifying the above scheme, the elastic material is one of rubber, silicone, or polytetrafluoroethylene.

[0011] As a further limitation of the above scheme, the curvature of the annular arc concavity is adapted to the curvature of the inner semicircle and the outer semicircle.

[0012] As a further limitation of the above scheme, the width of the arc-shaped convex ring is smaller than the width of the annular arc-shaped recess.

[0013] Advantages of this utility model compared to the prior art: 1. This solution significantly improves sealing performance by changing the sealing gasket to a double-ring structure with inner and outer rings, and changing the surface seal to a line seal. 2. This solution, through the design of a double-ring sealing ring and a circular arc convex ring, can provide elastic compensation under pressure, prevent the gasket from being squeezed out, and the circular arc convex ring forms an auxiliary sealing line, further improving the sealing reliability; 3. The double-ring structure of the sealing gasket in this solution effectively prevents gasket extrusion and extends service life; 4. This solution can reduce the initial tightening torque by more than 30%, thus reducing maintenance frequency; 5. This solution has a simple structure, is easy to manufacture and install, is suitable for various working conditions, and has good versatility and reliability. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a cross-sectional view of one embodiment of the present utility model; Figure 4 This utility model Figure 3 A top view of one embodiment is shown.

[0015] In the diagram: 1-Sealing ring annular body; 2-Inner semi-circular ring; 3-Outer semi-circular ring; 4-Annular arc recess; 5-Arch convex ring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0017] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0018] Please see Figure 1-4 The embodiments of this utility model are described in detail below.

[0019] Example 1: See Figure 1 , Figure 2 As shown, this embodiment provides a double-ring line contact anti-extrusion sealing gasket, including a sealing ring annular body 1. Preferably, the sealing ring annular body 1 is made of an elastic material; the elastic material is one of rubber, silicone or polytetrafluoroethylene.

[0020] The sealing ring annular body 1 is integrally formed by an inner semi-circular ring 2 and an outer semi-circular ring 3 through a connecting structure; the outer side of the inner semi-circular ring 2 and the inner side of the outer semi-circular ring 3 are connected by annular arc recesses 4 on both the upper and lower sides.

[0021] The cross-sections of both the inner semicircular ring 2 and the outer semicircular ring 3 are circular. The curvature of the annular arc recess 4 is adapted to the curvature of the inner semicircular ring 2 and the outer semicircular ring 3.

[0022] This invention significantly improves sealing performance and extrusion resistance by changing the surface seal to a line seal, while reducing the initial tightening torque by more than 30%. It has the advantages of simple structure, reliable sealing, and long service life.

[0023] Example 2: This example is an optimization based on Example 1. (See attached document for details.) Figure 3 , Figure 4 As shown, a circular arc protrusion 5 is provided in the middle of the annular arc recess 4. The highest point of the circular arc protrusion 5 is lower than the highest point of the arcs of the inner semicircular ring 2 and the outer semicircular ring 3. The width of the circular arc protrusion 5 is smaller than the width of the annular arc recess 4.

[0024] During assembly, the inner semi-circular ring 2 and the outer semi-circular ring 3 respectively form line contact with the sealing surface of the equipment to achieve the main seal. When subjected to further compression, the arc-shaped convex ring 5 contacts the sealing surface to form an auxiliary sealing line, further enhancing the sealing effect.

[0025] This invention replaces the traditional surface seal with a line seal through a double-ring structure, reducing the pressure-bearing area and increasing the sealing pressure per unit area, thereby effectively preventing media leakage. Simultaneously, the design of the annular concave and convex arc rings provides elastic compensation under pressure, preventing gasket extrusion and maintaining seal stability. The auxiliary sealing line formed by the convex arc rings further enhances sealing reliability, making it particularly suitable for high-pressure, high-temperature, or corrosive media environments.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0027] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A double-ring line contact type anti-extrusion sealing gasket, comprising a sealing ring annular body (1), characterized in that: The sealing ring annular body (1) is integrally formed by an inner semi-circular ring (2) and an outer semi-circular ring (3) through a connecting structure; the outer side of the annular surface of the inner semi-circular ring (2) and the inner side of the annular surface of the outer semi-circular ring (3) are connected by annular arc recesses (4) on both the upper and lower sides.

2. The double-ring line contact type anti-extrusion sealing gasket according to claim 1, characterized in that: The annular arc recess (4) has an arc convex ring (5) in the middle.

3. The double-ring line contact type anti-extrusion sealing gasket according to claim 2, characterized in that: The highest point of the arc convex ring (5) is lower than the highest point of the arc of the inner semicircular ring (2) and the outer semicircular ring (3).

4. The double-ring line contact type anti-extrusion sealing gasket according to claim 1, characterized in that: The cross-sections of the inner semicircular ring (2) and the outer semicircular ring (3) are both semicircular.

5. The double-ring line contact type anti-extrusion sealing gasket according to claim 1, characterized in that: The sealing ring annular body (1) is made of elastic material.

6. The double-ring line contact type anti-extrusion sealing gasket according to claim 5, characterized in that: The elastic material is one of rubber, silicone, or polytetrafluoroethylene.

7. The double-ring line contact type anti-extrusion sealing gasket according to claim 1, characterized in that: The curvature of the annular arc recess (4) is adapted to the curvature of the inner semicircular ring (2) and the outer semicircular ring (3).

8. The double-ring line contact type anti-extrusion sealing gasket according to claim 2, characterized in that: The width of the arc-shaped convex ring (5) is smaller than the width of the annular arc-shaped recess (4).

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