Improved metal wound gasket

Abstract

The utility model relates to an improved metal wound gasket which comprises an inner ring, a sealing ring body and an outer ring, the sealing ring body is arranged between the inner ring and the outer ring, the sealing ring body is formed by alternately stacking and winding a metal belt and a non-metal belt into a ring shape, an outer ring of the inner ring is provided with an inner ring groove, and a redundant part is arranged at a notch of the inner ring groove. A gasket is arranged at an opening of the redundant part, a positioning protrusion is arranged at the groove bottom of the inner ring groove, an inner ring of the sealing ring body is clamped in the redundant part, the first inner ring end of the sealing ring body is connected with the positioning protrusion, an outer ring groove is formed in an inner ring of the outer ring, an outer ring of the sealing ring body is clamped in the outer ring groove, and an elastic metal spring is arranged in the outer ring groove. The elastic metal spring abuts against the outer ring of the sealing ring body. The inner ring and the outer ring are matched to limit the sealing ring body, so that the structure is compact, the inner ring is provided with the inner ring groove, and the inner ring of the sealing ring body is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing gaskets, in particular to an improved metal winding gasket. Background Art

[0002] Metal spiral wound gasket is a widely used sealing gasket. It is the gasket with the best resilience among semi-metallic sealing gaskets. It is made of V-shaped or W-shaped thin steel strips alternately wound with various fillers. It can withstand high temperature and high pressure and can adapt to ultra-low temperature or vacuum conditions. By changing the material combination of the gasket, the problem of chemical corrosion of the gasket by various media can be solved. Utility Model Content

[0003] Based on this, it is necessary to provide an improved metal winding pad to address the above problems.

[0004] An improved metal winding gasket comprises an inner ring, a sealing ring body and an outer ring, the sealing ring body being arranged between the inner ring and the outer ring, the sealing ring body being formed into a ring shape by alternately stacking metal strips and non-metal strips, the outer ring of the inner ring having an inner ring groove, a redundant portion being arranged at the groove opening of the inner ring groove, a gasket being arranged at the opening of the redundant portion, a positioning protrusion being arranged at the groove bottom of the inner ring groove, the inner ring of the sealing ring body being clamped in the redundant portion, a first inner ring end portion of the sealing ring body being connected to the positioning protrusion, the inner ring of the outer ring having an outer ring groove, the outer ring of the sealing ring body being clamped in the outer ring groove, an elastic metal spring being arranged in the outer ring groove, and the elastic metal spring being in contact with the outer ring of the sealing ring body.

[0005] Preferably, the outer ring of the outer annular ring is provided with a step for matching with the flange.

[0006] Preferably, a rubber pad is adhered to the step platform.

[0007] Preferably, the non-metallic belt is made of a thin plate layer of graphite, mica or non-asbestos.

[0008] Preferably, the surface of the sealing ring body is coated with an anti-corrosion layer.

[0009] The utility model is beneficial in that the inner ring and the outer ring cooperate to restrict the sealing ring body, making the structure compact, and the inner ring has an inner ring groove to prevent the inner ring of the sealing ring body from being loose, and the outer ring has an elastic metal spring to provide elastic supporting force for the sealing ring body, so that the sealing ring body has a self-tightening sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of a three-dimensional structure of an improved metal winding pad according to one embodiment;

[0011] Figure 2 It is a top view schematic diagram of an improved metal winding pad;

[0012] Figure 3 An improved metal spiral wound gasket Figure 2 Schematic diagram of the AA section view. DETAILED DESCRIPTION

[0013] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0014] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0016] like Figures 1 to 3As shown, an improved metal winding gasket comprises an inner ring 1, a sealing ring body 2 and an outer ring 3, wherein the sealing ring body 2 is arranged between the inner ring 1 and the outer ring 3, and the sealing ring body 2 is formed into a ring shape by alternately stacking metal belts and non-metal belts, the outer ring of the inner ring 1 has an inner ring groove 11, a redundant part 12 is arranged at the groove of the inner ring groove 11, a gasket 13 is arranged at the opening of the redundant part 12, a positioning protrusion 14 is arranged at the groove bottom of the inner ring groove 11, the inner ring of the sealing ring body 2 is clamped in the redundant part 12, the first inner ring end of the sealing ring body 2 is connected to the positioning protrusion 14, the inner ring of the outer ring 3 has an outer ring groove 31, the outer ring of the sealing ring body 2 is clamped in the outer ring groove 31, an elastic metal spring 32 is arranged in the outer ring groove 31, and the elastic metal spring 32 abuts against the outer ring of the sealing ring body 2. Specifically, in this embodiment, the metal winding gasket is arranged between the two flanges to enhance the sealing performance of the flange joint surface. The inner ring 1 and the outer ring 3 are used to clamp and install the sealing ring body 2 in the middle. The cross section of the sealing ring body 2 is V-shaped, and the height is greater than the height of the inner ring 1 and the outer ring 3, so that the sealing ring body 2 can fit tightly with the end face of the flange. In order to make the inner ring 1 and the sealing ring body 2 tightly assembled, we set the inner ring groove 11 on the outer ring of the inner ring 1, so that when the sealing ring body 2 is wound, its first inner ring is directly embedded in the inner ring groove 11, and the redundant part 12 of the inner ring groove 11 is used to match the first inner ring edge of the sealing ring body 2, and the gasket 13 at the opening of the redundant part 12 can be used to support the second inner ring of the sealing ring body 2, so that the sealing ring body 2 is wound around the outer side of the inner ring 1, and the positioning protrusion 14 can be used to connect the first inner ring of the sealing ring body 2 to prevent the inner ring layer of the sealing ring body 2 from loosening. The outer ring of the sealing ring body 2 is provided with an outer ring 3, and the outer ring groove 31 has a built-in elastic metal spring 32 for providing elastic force. When the sealing ring body 2 is crimped by the flange surface and the working pressure increases, it will undergo a certain deformation and expand toward the outer ring 3. At this time, the elastic metal spring 32 can play an elastic supporting role for the sealing ring body 2, so that the sealing ring body 2 also has a self-tightening sealing performance.

[0017] like Figures 1 to 3 As shown, the outer ring of the outer ring 3 is provided with a step 33 for matching with the flange. The step 33 is clamped by the docking flange to play a limiting role, thereby preventing the outer ring 3 from being installed misaligned, and ensuring that the entire metal winding gasket and the flange are coaxial.

[0018] like Figures 1 to 3 As shown, a rubber pad 34 is adhered to the step 33 to enhance the sealing between the step 33 and the flange surface.

[0019] Specifically, the non-metallic belt is made of a thin plate layer of graphite, mica or non-asbestos.

[0020] Specifically, an anti-corrosion layer is applied on the surface of the sealing ring body 2. The anti-corrosion layer can form a physical barrier, effectively preventing harmful substances such as moisture, chemicals, oxygen, etc. from contacting the surface of the metal wound gasket, thereby reducing or preventing the occurrence of corrosion. This anti-corrosion layer can significantly enhance the corrosion resistance of the metal wound gasket and ensure its long-term stable operation in various harsh environments. By providing corrosion protection, the anti-corrosion layer can significantly extend the service life of the metal wound gasket. Under various environmental conditions, the life of the metal wound gasket is affected by corrosion and oxidation. The anti-corrosion layer can mitigate these adverse effects, allowing the metal wound gasket to maintain its original performance for a longer period of time.

[0021] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An improved metal winding pad, characterized in that: It includes an inner ring, a sealing ring body and an outer ring, the sealing ring body is arranged between the inner ring and the outer ring, the sealing ring body is formed into a ring shape by alternately stacking metal belts and non-metal belts, the outer ring of the inner ring has an inner ring groove, a redundant part is arranged at the groove mouth of the inner ring groove, a gasket is arranged at the opening of the redundant part, a positioning protrusion is arranged at the groove bottom of the inner ring groove, the inner ring of the sealing ring body is clamped in the redundant part, the first inner ring end of the sealing ring body is connected to the positioning protrusion, the inner ring of the outer ring has an outer ring groove, the outer ring of the sealing ring body is clamped in the outer ring groove, an elastic metal spring is arranged in the outer ring groove, and the elastic metal spring abuts against the outer ring of the sealing ring body.

2. An improved metal winding pad as claimed in claim 1, characterized in that: The outer ring of the outer annular ring is provided with a step for matching with the flange.

3. An improved metal winding pad as claimed in claim 2, characterized in that: A rubber pad is adhered to the step platform.

4. An improved metal winding pad as claimed in claim 1, characterized in that: The non-metallic belt is made of a thin plate layer of graphite, mica or non-asbestos.

5. An improved metal winding pad as claimed in claim 1, characterized in that: The surface of the sealing ring body is coated with an anti-corrosion layer.

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