Sealing flange

Abstract

The utility model provides a sealing flange which comprises a first flange plate, a second flange plate, an inner-layer gasket and an outer-layer gasket. A step-shaped tenon surface structure is arranged on the sealing surface of the first flange plate; the sealing face of the second flange plate is provided with a step-shaped groove face structure opposite to the step-shaped tenon face structure. The inner-layer gasket and the outer-layer gasket are arranged between the first flange plate and the second flange plate and used for sealing. The sealing flange is simple in structure and can ensure the sealing reliability.

Description

Technical Field

[0001] The utility model relates to the field of flange sealing, in particular to a sealing flange. Background Art

[0002] Flanges are parts that connect pipes to each other and play an important role in industrial manufacturing. An industrial piping system usually contains many flange components, so the effect and reliability of flange sealing are particularly important.

[0003] In view of this, it is urgent to design a sealing flange that takes into account both sealing effect and reliability and has a simple structure. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a sealing flange.

[0005] The utility model provides a sealing flange, comprising: a first flange plate, a second flange plate, an inner gasket and an outer gasket; a step-type tenon surface structure is arranged on the sealing surface of the first flange plate; a step-type groove surface structure relative to the step-type tenon surface structure is arranged on the sealing surface of the second flange plate; the inner gasket and the outer gasket are arranged between the first flange plate and the second flange plate for sealing.

[0006] According to an embodiment of the present invention, the inner gasket is made of metal material, and the outer gasket is made of non-metal material.

[0007] According to an embodiment of the present invention, the first flange plate includes a first protruding connection portion and a first flange ring, the first flange ring is arranged on the periphery of the first protruding connection portion, and a plurality of first bolt through holes are evenly arranged on the first flange ring.

[0008] According to an embodiment of the present utility model, the stepped tenon surface structure is arranged on an end surface of the first flange ring away from the first raised connecting portion in the axial direction.

[0009] According to an embodiment of the present utility model, in the radial direction, the stepped tenon surface structure is located on the sealing surface between the first protruding connection portion and the plurality of first bolt through holes.

[0010] According to an embodiment of the present invention, the second flange plate includes a second raised connecting portion and a second flange ring, the second flange ring is arranged on the periphery of the second raised connecting portion, and a plurality of second bolt through holes are evenly arranged on the second flange ring.

[0011] According to an embodiment of the present invention, the step-type groove surface structure is arranged on an end surface of the second flange ring away from the second raised connecting portion in the axial direction.

[0012] According to an embodiment of the present utility model, in the radial direction, the step-type groove surface structure is located on the sealing surface between the second protruding connecting portion and the plurality of second bolt through holes.

[0013] According to one embodiment of the utility model, the step-type tenon surface structure is double-layered, and is divided into an inner step and an outer step in sequence along the radial direction outward, and the inner step is higher than the outer step; the step-type groove surface structure is double-layered, and is divided into an inner groove and an outer groove in sequence along the radial direction outward, and the inner groove is lower than the outer groove.

[0014] According to an embodiment of the utility model, the inner gasket is used to be installed between the inner step and the inner groove, and the outer gasket is used to be installed between the outer step and the outer groove.

[0015] The use of the sealing flange with the stepped tenon surface structure and the stepped groove surface structure according to the present application can ensure that the first flange and the second flange are easily centered during installation, and can also effectively solve the problem that the sealing ring, i.e., the gasket, is easily squeezed out of the sealing surface. The inner gasket and the outer gasket can adapt to the environmental changes of the flange, ensure that the first flange and the second flange fit tightly, and ensure the reliability of the seal.

[0016] It should be understood that the above general description and the following specific embodiments are only exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are a part of the specification of the present utility model, which illustrate exemplary embodiments of the present utility model. The attached drawings and the description of the specification are used to explain the principle of the utility model.

[0018] Figure 1 It is a front view of a sealing flange of an embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional view of a sealing flange according to an embodiment of the utility model.

[0020] Reference numerals:

[0021] 100-first flange, 101-step-type tenon surface structure, 1011-inner step, 1012-outer step, 102-first raised connection portion, 103-first flange ring, 104-first bolt through hole, 200-second flange, 201-step-type groove surface structure, 2011-inner groove, 2012-outer groove, 202-second raised connection portion, 203-second flange ring, 204-second bolt through hole, 300-inner gasket, 400-outer gasket. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are used to illustrate the principles of the present invention, and are not configured to limit the present invention. In addition, the structural components in the drawings are not necessarily drawn to scale. For example, the sizes of some structural components or areas in the drawings may be enlarged for other structural components or areas to help understand the embodiments of the present invention.

[0023] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the utility model. In the description of the utility model, it should be noted that, unless otherwise specified, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In addition, the terms "include", "comprise", "have" or any other variations thereof are intended to cover non-exclusive inclusion, so that a structure or component including a series of elements includes not only those elements, but also other mechanical elements that are not explicitly listed or inherent in the structure or component. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the article or device including the elements.

[0025] Spatially related terms such as "below", "beneath", "under", "low", "above", "on", "high", etc. are used to facilitate description to explain the positioning of one element relative to a second element, indicating that these terms are intended to cover different orientations of the device in addition to orientations different from those shown in the figures. In addition, for example, "one element is above / below another element" can mean that the two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, parts, etc., and should not be regarded as limiting. Similar terms represent similar elements throughout the description.

[0026] For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by showing examples of the present invention.

[0027] Figure 1 It is a front view of a sealing flange of an embodiment of the utility model; Figure 2 It is a cross-sectional view of a sealing flange according to an embodiment of the utility model.

[0028] like Figure 1 As shown, the utility model provides a sealing flange, including a first flange 100, a second flange 200, an inner gasket 300 and an outer gasket 400. A step-type tenon surface structure 101 is provided on the sealing surface of the first flange 100, and a step-type groove surface structure 201 is provided on the sealing surface of the second flange 200 relative to the step-type tenon surface structure 101. The inner gasket 300 and the outer gasket 400 are provided between the first flange 100 and the second flange 200 for sealing.

[0029] According to an embodiment of the present invention, the inner gasket 300 is made of metal material, and the outer gasket 400 is made of non-metal material.

[0030] Specifically, the present embodiment adopts the design of the stepped tongue-and-groove sealing structure. Through the stepped tongue surface structure 101 and the stepped groove surface structure 201, it can ensure that the first flange 100 and the second flange 200 are easy to be centered during installation, and can also effectively solve the problem that the gasket seal is easy to squeeze out of the sealing surface. The inner gasket 300 is arranged on the inner side of the opposite surface of the stepped tongue surface structure 101 and the stepped groove surface structure 201, and the outer gasket 400 is arranged on the outer side of the opposite surface of the stepped tongue surface structure 101 and the stepped groove surface structure 201. Through this combined sealing method, i.e., the inner metal gasket and the outer non-metal gasket, it can adapt to the environmental changes of the flange and ensure that the first flange 100 and the second flange 200 are tightly fitted.

[0031] Among them, the use of double-layer gaskets can adapt to low-temperature pipeline environments and pipeline environments with repeated changes between cold and normal temperatures, increase the reliability of sealing, and reduce the risk of leakage. In particular, the use of a sealing form combining a metal inner gasket 300 and a non-metal outer gasket 400 can effectively solve the problem that too little pre-tightening force easily leads to poor sealing when using only the metal inner gasket 300, and too much pre-tightening force easily leads to breakage when using only the non-metal outer gasket 400.

[0032] like Figure 2 As shown, according to an embodiment of the present invention, the first flange 100 includes a first protruding connection portion 102 and a first flange ring 103. The first flange ring 103 is disposed on the periphery of the first protruding connection portion 102, and a plurality of first bolt through holes 104 are evenly disposed on the first flange ring 103.

[0033] According to an embodiment of the present invention, the stepped tenon structure 101 is disposed on an end surface of the first flange ring 103 away from the first protruding connection portion 102 in the axial direction.

[0034] According to an embodiment of the present invention, in the radial direction, the stepped tenon surface structure 101 is located on the sealing surface between the first protruding connection portion 102 and the plurality of first bolt through holes 104 .

[0035] According to an embodiment of the present invention, the second flange 200 includes a second protruding connection portion 202 and a second flange ring 203. The second flange ring 203 is disposed on the periphery of the second protruding connection portion 202, and a plurality of second bolt through holes 204 are evenly disposed on the second flange ring 203.

[0036] According to an embodiment of the present invention, the step-type groove surface structure 201 is disposed on the end surface of the second flange ring 203 away from the second protruding connecting portion 202 in the axial direction.

[0037] According to an embodiment of the present invention, in the radial direction, the step-shaped groove surface structure 201 is located on the sealing surface between the second protruding connecting portion 202 and the plurality of second bolt through holes 204 .

[0038] According to one embodiment of the utility model, the step-type tenon surface structure 101 is double-layered, and is divided into an inner step 1011 and an outer step 1012 in sequence along the radial direction outward, and the inner step 1011 is higher than the outer step 1012; the step-type groove surface structure 201 is double-layered, and is divided into an inner groove 2011 and an outer groove 2012 in sequence along the radial direction outward, and the inner groove 2011 is lower than the outer groove 2012.

[0039] According to an embodiment of the present invention, the inner gasket 300 is used to be installed between the inner step 1011 and the inner groove 2011 , and the outer gasket 400 is used to be installed between the outer step 1012 and the outer groove 2012 .

[0040] Specifically, the first flange 100 and the second flange 200 can be selected as a separate structure or an integrated structure, and the present application preferably uses an integrated structure that is integrally machined. As one embodiment, the first raised connection portion 102, the first flange ring 103 and the stepped tenon surface structure 101 are integrally formed, and the second raised connection portion 202, the second flange ring 203 and the stepped groove surface structure 201 are integrally formed.

[0041] In this embodiment, the annular inner step 1011 can be embedded in the annular inner groove 2011, and the annular outer step 1012 can be embedded in the annular outer groove 2012, so that the remaining sealing surfaces of the end faces of the first flange ring 103 and the second flange ring 203 fit each other more closely. In order to ensure the reliability of the seal, an inner gasket 300 is placed between the inner step 1011 and the inner groove 2011. The inner gasket 300 is a metal flat gasket, which can ensure that the gasket is not easy to break in an environment with temperature changes, thereby ensuring the reliability of the seal. An outer gasket 400 is placed between the outer step 1012 and the outer groove 2012. The outer gasket 400 is a non-metallic flat gasket, which can ensure the resilience of the gasket even after low-temperature cooling, thereby ensuring the sealing between the first flange ring 103 and the second flange ring 203 in the sealing flange, and preventing leakage.

[0042] In specific operation, the inner gasket 300 is placed in the inner groove 2011 of the second flange ring 203, the outer gasket is placed in the outer groove 2012 of the second flange ring 203, the inner step 1011 of the first flange ring 103 is pressed onto the inner gasket 300, and the outer step 1012 is pressed onto the outer gasket 400. Then, bolts are sequentially passed through the first bolt through hole 104 of the first flange and the second bolt through hole 204 of the second flange, and appropriate pre-tightening force can effectively increase the overall rigidity of the sealing flange.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing flange, characterized in that: include: A first flange, a second flange, an inner gasket and an outer gasket; A stepped tenon structure is provided on the sealing surface of the first flange; A step-shaped groove surface structure corresponding to the step-shaped tenon surface structure is provided on the sealing surface of the second flange; The inner gasket and the outer gasket are arranged between the first flange and the second flange for sealing.

2. The sealing flange according to claim 1, characterized in that: The inner gasket is made of metal, and the outer gasket is made of non-metallic material.

3. The sealing flange according to claim 1, characterized in that: The first flange plate includes a first protruding connection portion and a first flange ring. The first flange ring is arranged at the periphery of the first protruding connection portion. A plurality of first bolt through holes are evenly arranged on the first flange ring.

4. The sealing flange according to claim 3, characterized in that: The stepped tenon structure is arranged on an end surface of the first flange ring in the axial direction away from the first raised connecting portion.

5. The sealing flange according to claim 4, characterized in that: In the radial direction, the stepped tenon surface structure is located on a sealing surface between the first protruding connection portion and the first bolt through holes.

6. The sealing flange according to claim 1, characterized in that: The second flange plate includes a second protruding connection portion and a second flange ring. The second flange ring is arranged at the periphery of the second protruding connection portion. A plurality of second bolt through holes are evenly arranged on the second flange ring.

7. The sealing flange according to claim 6, characterized in that: The step-type groove surface structure is arranged on the end surface of the second flange ring away from the second raised connecting portion in the axial direction.

8. The sealing flange according to claim 7, characterized in that: In the radial direction, the step-type groove surface structure is located on the sealing surface between the second protruding connecting portion and the plurality of second bolt through holes.

9. The sealing flange according to claim 2, characterized in that: The step-type tenon surface structure is double-layered, and is divided into an inner step and an outer step in sequence along the radial direction outward, and the inner step is higher than the outer step; the step-type groove surface structure is double-layered, and is divided into an inner groove and an outer groove in sequence along the radial direction outward, and the inner groove is lower than the outer groove.

10. The sealing flange according to claim 9, characterized in that: The inner gasket is used to be installed between the inner step and the inner groove, and the outer gasket is used to be installed between the outer step and the outer groove.

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