Metal ring embedded tooth profile composite gasket

Abstract

This invention discloses a metal ring-embedded toothed composite gasket, comprising a ring-shaped toothed skeleton and a non-metallic layer. The ring-shaped toothed skeleton includes several steel strip rings with identical structures and gradually varying sizes, coaxially nested in sequence. The non-metallic layer is symmetrically arranged on both the upper and lower sides of the ring-shaped toothed skeleton along its axial direction. Multiple outer steel strip weirs arranged in a stacked pattern are coaxially fitted on the outer side of the ring-shaped toothed skeleton, and multiple inner steel strip weirs arranged in a stacked pattern are coaxially fitted on the inner side of the ring-shaped toothed skeleton. The outer and inner steel strip weirs are connected to the ring-shaped toothed skeleton. The use of multiple V-shaped steel strip rings coaxially nested in sequence to form the ring-shaped toothed skeleton changes the original toothed skeleton's shape, which helps eliminate safety risks at the weld joints of the metal toothed skeleton and reduces processing costs. The W-shaped steel strip weirs form protective weirs, protecting the non-metallic layer while providing radial pressure to the composite gasket, enhancing its axial compressive strength, and further improving its sealing performance.

Description

Technical Field

[0001] This invention relates to the field of flange static sealing technology, specifically to a metal ring-embedded toothed composite gasket. Background Technology

[0002] In the field of flange static sealing technology, spiral wound gaskets and toothed composite gaskets are both widely used sealing gaskets, capable of withstanding high temperatures, high pressures, and adapting to ultra-low temperatures or vacuum conditions. However, both spiral wound gaskets and toothed composite gaskets have their limitations and areas for improvement.

[0003] Metal spiral wound gaskets are a type of thin-strip, narrow-strip, composite, superimposed structure. Their torsional and bending resistance exhibit significant variability and are easily damaged in weaker directions, especially large-diameter gaskets. Sudden disintegration is a frequent occurrence during manufacturing. Excessive impact or vibration during transportation and installation can also cause damage and disintegration, hindering equipment maintenance and potentially leading to catastrophic accidents. Furthermore, the sealing performance of metal spiral wound gaskets is insufficient under poor installation conditions (such as minor flange surface defects).

[0004] Traditional toothed composite gaskets lack compressive resilience due to the limitations of their metal toothed skeleton structure. Furthermore, the thickness of the graphite composite layer is also limited by the structural constraints of the metal toothed skeleton, thus restricting their applicability in applications requiring superior elastic compensation. Additionally, large-diameter metal toothed skeletons require multiple steel plates to be welded together due to width limitations, posing significant safety risks at the weld joints. Traditional metal toothed skeleton manufacturing processes also present challenges in processing large-diameter products, including high equipment requirements and high material costs.

[0005] Therefore, a metal ring-embedded toothed composite gasket is provided to address the current shortcomings. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a metal ring-embedded toothed composite gasket.

[0007] To solve the above-mentioned technical problems, the technical solution provided by the present invention is a metal ring-embedded toothed composite gasket: comprising a ring-shaped toothed skeleton and a non-metallic layer;

[0008] The annular toothed skeleton comprises several steel bar rings with identical structures and gradually changing diameters, nested coaxially in sequence.

[0009] The annular toothed skeleton is symmetrically provided with non-metallic layers on both the upper and lower sides along the axial direction. Multiple outer steel strip cofferdams are coaxially sleeved on the outer side of the annular toothed skeleton, and multiple inner steel strip cofferdams are coaxially sleeved on the inner side of the annular toothed skeleton. Both the outer and inner steel strip cofferdams are connected to the annular toothed skeleton.

[0010] As an improvement, the axial cross-section of the steel bar ring is V-shaped, and the opening directions of the steel bar ring are the same and face outwards.

[0011] As an improvement, the axial section shape of the steel strip cofferdam is W-shaped, and the opening direction of the outer steel strip cofferdam is the same as that of the inner steel strip cofferdam.

[0012] As an improvement, an outer steel ring is provided on the outer side of the outer steel belt cofferdam, and an inner steel ring is provided on the inner side of the inner steel belt cofferdam.

[0013] The advantages of this invention compared to the prior art are:

[0014] 1. Multiple V-shaped steel bar rings are coaxially nested to form a ring-shaped toothed skeleton. While ensuring its original performance, the original toothed skeleton is modified, which helps to eliminate the safety risks of the weld joint of the metal toothed skeleton and further reduces the processing cost.

[0015] 2. A radial protective dam is formed by a W-shaped steel strip dam to create a ring-shaped toothed skeleton, which protects the non-metallic layer from the impact of the medium and enhances the sealing safety of the gasket. At the same time, the height of the steel strip dam is greater than the thickness of the ring-shaped toothed skeleton, which can increase the thickness of the non-metallic layer, thereby improving the compression performance and resilience of the composite gasket and thus improving the gasket's adaptability to working conditions.

[0016] 3. The height of the steel strip cofferdam is greater than the thickness of the annular toothed skeleton, which can increase the thickness of the composite non-metallic layer and give the gasket surface a sufficiently thick flexible layer, thus making it more adaptable to minor defects in the flange sealing surface.

[0017] 4. By setting up a steel belt cofferdam, radial pressure is provided to the composite gasket, enhancing the axial compressive performance of the gasket and further improving the sealing performance of the gasket. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a metal ring-embedded toothed composite gasket according to the present invention.

[0019] Figure 2 This is a front view of a metal ring-embedded toothed composite gasket according to the present invention.

[0020] Figure 3 yes Figure 2 Sectional view at point AA.

[0021] Figure 4 yes Figure 3 A magnified view of a section at point B.

[0022] As shown in the figure: 1. Ring-shaped toothed skeleton, 2. Non-metallic layer, 3. Steel bar ring, 4. Outer steel strip cofferdam, 5. Inner steel strip cofferdam, 6. Outer steel ring, 7. Inner steel ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of the present invention, "multiple" means at least two.

[0027] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0028] Combined with appendix Figure 1-4As shown, a metal ring-embedded toothed composite gasket includes a ring-shaped toothed skeleton 1 and a non-metallic layer 2.

[0029] The annular toothed skeleton 1 includes several steel bar rings 3 with the same structure and gradually changing diameter, which are coaxially nested in sequence. The steel bar rings 3 are bent from steel bars using a rolling die, and their thickness is uniform. The parallelism of the tooth top surfaces of the nested annular toothed skeleton is better, and it has good consistency. The adjacent steel bar rings 3 are connected by welding at the joint to ensure the structural stability of the annular toothed skeleton 1. At the same time, when processing large-diameter metal annular toothed skeletons, the weld joints between the steel bar rings 3 can be staggered, so that there are no continuous weld joints in the radial direction of the annular toothed skeleton 1, which helps to eliminate the safety risks of the weld joints of the metal toothed skeleton.

[0030] In addition, the specific number of steel bar rings 3 can be set according to actual needs;

[0031] Furthermore, the axial cross-sectional shape of the steel bar ring 3 is V-shaped, and the opening directions of the steel bar ring 3 are the same and face outward.

[0032] The annular toothed skeleton 1 is symmetrically provided with non-metallic layers 2 on both the upper and lower sides along the axial direction, which greatly improves the compression and resilience performance of the composite gasket. At the same time, it has the function of repairing minor defects on the flange sealing surface. Specifically, the non-metallic layer 2 is one or more of asbestos, flexible graphite, polytetrafluoroethylene, and ceramic fiber.

[0033] The outer side of the annular toothed skeleton 1 is coaxially fitted with multiple stacked outer steel strip cofferdams 4, and the inner side of the annular toothed skeleton 1 is coaxially fitted with multiple stacked inner steel strip cofferdams 5. The steel strip cofferdams are connected to the annular toothed skeleton 1. The inner steel strip cofferdams 5 and the outer steel strip cofferdams 4 form radial inner and outer cofferdams of the annular toothed skeleton 1, which can effectively protect the non-metallic layer 2 and provide radial confining pressure for the composite gasket to enhance the axial compressive strength of the composite gasket, so that the composite gasket can obtain higher stress and improve the pressure resistance range and sealing performance of the composite gasket.

[0034] The axial cross-sectional shape of the steel strip cofferdam is W-shaped, and the opening directions of the outer steel strip cofferdam 4 and the inner steel strip cofferdam 5 are the same.

[0035] Furthermore, the height of the steel strip cofferdam is greater than the thickness of the annular toothed skeleton 1, which can increase the thickness of the non-metallic layer 2, thereby improving the compression performance and resilience of the composite gasket, thus improving the working condition adaptability of the composite gasket; it can also increase the thickness of the non-metallic layer 2, so that the surface of the composite gasket has a sufficiently thick flexible layer, thus being more adaptable to the situation where there are slight defects on the flange sealing surface.

[0036] In actual use, depending on the requirements of the actual application, an outer steel ring 6 can be set on the outside of the outer steel belt cofferdam 4, or an inner steel ring 7 can be set on the inside of the inner steel belt cofferdam 5, or an outer steel ring 6 and an inner steel ring 7 can be set on the outside of the outer steel belt cofferdam 4 and the inside of the inner steel belt cofferdam 5 respectively.

[0037] The annular toothed skeleton 1 in this composite gasket replaces the steel plate with prefabricated V-shaped steel strips, eliminating the need for shearing or strip-cutting equipment. The toothed shape does not require machine tool processing; only low-energy metal strip bending equipment is needed. This completely changes the material form, processing technology, and processing equipment of the original toothed skeleton, and also disperses or eliminates the safety risks of welding joints of large-sized toothed skeletons.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A metal ring-embedded toothed composite gasket, characterized in that: It includes a ring-shaped toothed skeleton (1) and a non-metallic layer (2); The annular toothed skeleton (1) includes several steel bar rings (3) with the same structure and gradually changing diameter, which are coaxially nested in sequence. The annular toothed skeleton (1) is symmetrically provided with non-metallic layers (2) on both the upper and lower sides along the axial direction. Multiple outer steel strip cofferdams (4) are coaxially sleeved on the outer side of the annular toothed skeleton (1), and multiple inner steel strip cofferdams (5) are coaxially sleeved on the inner side of the annular toothed skeleton (1). Both the outer steel strip cofferdams (4) and the inner steel strip cofferdams (5) are connected to the annular toothed skeleton (1).

2. The metal ring-embedded toothed composite gasket according to claim 1, characterized in that: The axial cross-section of the steel bar ring (3) is V-shaped, and the opening directions of the steel bar ring (3) are the same and face outward.

3. The metal ring-embedded toothed composite gasket according to claim 1, characterized in that: The outer steel strip cofferdam (4) and the inner steel strip cofferdam (5) have W-shaped axial sections, and the opening directions of the outer steel strip cofferdam (4) and the inner steel strip cofferdam (5) are the same.

4. The metal ring-embedded toothed composite gasket according to claim 1, characterized in that: The adjacent steel bar rings (3) are welded together at the joint.

5. The metal ring-embedded toothed composite gasket according to claim 1, characterized in that: The outer steel belt cofferdam (4) is provided with an outer steel ring (6) on the outside, and the inner steel belt cofferdam (5) is provided with an inner steel ring (7) on the inside.

6. A metal ring-embedded toothed composite gasket according to claim 5, characterized in that: The outer steel ring (6) has the same thickness as the inner steel ring (7) and is less than the thickness of the annular toothed skeleton (1).

7. The metal ring-embedded toothed composite gasket according to claim 1, characterized in that: The heights of the outer steel belt cofferdam (4) and the inner steel belt cofferdam (5) are both greater than the thickness of the annular toothed skeleton (1).

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