Flange with multiple sealing structures

Abstract

The invention relates to the technical field of flanges, in particular to a flange with multiple sealing structures, which comprises a flange plate body, a plurality of bolt holes are formed in the surface of the flange plate body, a plug ring is integrally formed on the inner ring surface of the flange plate body, and a sealing sleeve sleeves one end, away from the flange plate body, of the plug ring. A traction sleeve is integrally formed on the inner ring face of the sealing sleeve, a first sealing gasket is integrally formed at the end, away from the sealing sleeve, of the traction sleeve and fixed to the surface of the flange plate body, a plurality of through holes are formed in the first sealing gasket, bolt fastening sleeves are integrally formed in the through holes, and the bolt fastening sleeves are inserted into the bolt holes. The flange with the multiple sealing structures has the beneficial effects that the plug ring is integrally formed on the inner ring surface of the flange plate body, the preformed groove is formed in the outer ring surface of the plug ring, and the sealing sleeve is arranged and fixed in a sleeving mode, so that the sealing sleeve can be clamped between the plug ring and a pipeline to generate elastic deformation; therefore, the sealing performance after the flange plate body is connected with the pipeline is enhanced.

Description

Technical Field

[0001] The invention relates to the field of flanges, in particular to a flange with a multiple sealing structure. Background Art

[0002] In industrial production and fluid transmission systems, flange connection is a common and important connection method used to connect pipes, valves, pumps and other equipment. Traditional flange connections often rely on the tightening force of bolts to achieve sealing, but due to factors such as processing accuracy, material differences, and use environment, there are often problems with poor sealing, resulting in fluid leakage, which not only wastes resources, but may also pollute the environment and even cause safety accidents.

[0003] In order to improve the sealing performance of flange connection, the existing technical solutions usually adopt the method of adding gaskets between flange and pipe to increase the contact area and compression force, thereby improving the sealing effect. However, such gaskets often have problems such as easy aging, easy damage, unstable sealing performance, etc., especially in harsh environments such as high pressure, high temperature, corrosion, etc., and their sealing performance is greatly reduced. Summary of the invention

[0004] The object of the present invention is to provide a flange with a multiple sealing structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flange with a multiple sealing structure, comprising a flange body, a surface of the flange body being provided with a plurality of bolt holes, an inner annular surface of the flange body being integrally formed with a plug ring, an end of the plug ring away from the flange body being provided with a sealing sleeve, an inner annular surface of the sealing sleeve being integrally formed with a traction sleeve, an end of the traction sleeve being integrally formed with a sealing gasket 1 away from the sealing sleeve, the sealing gasket 1 being fixed to the surface of the flange body, the sealing gasket 1 being provided with a plurality of through holes, a bolt fastening sleeve being integrally formed inside the through holes, and the bolt fastening sleeve being inserted into the bolt hole.

[0006] Preferably, a reserved groove is provided on the outer ring surface of one end of the plug ring away from the flange body, the sealing sleeve is sleeved and fixed in the reserved groove, and the outer ring diameter of the sealing sleeve is larger than the outer ring diameter of the plug ring.

[0007] Preferably, the traction sleeve is a "T"-shaped circular tube, one end of the traction sleeve is blocked at the end of the plug ring away from the flange body, the other end of the traction sleeve passes through the inner ring opening of the plug ring, and the outer ring surface of the other end of the traction sleeve is fixed in the inner ring surface of the plug ring.

[0008] Preferably, the inner ring diameter of the sealing gasket 1 is equal to the inner ring diameter of the traction sleeve, and the outer ring surface of the sealing gasket 1 is integrally formed with a limiting sleeve, and the limiting sleeve is arranged on the outer side of the flange body.

[0009] Preferably, the through holes and the bolt holes correspond one to one, the bolt fastening sleeve is a "T"-shaped circular tube, the tube length of the bolt fastening sleeve is greater than the depth of the bolt hole, and the outer ring diameter of one end of the bolt fastening sleeve passing through the bolt hole is greater than the hole diameter of the bolt hole.

[0010] Preferably, a segmented groove is provided on the surface of the sealing gasket 1, the segmented groove is an annular groove, two segmented grooves are provided, and the sizes of the two segmented grooves are different.

[0011] Preferably, a mounting groove is provided on a side of the flange body away from the first sealing gasket, the mounting groove is an annular groove, the second sealing gasket is fixed inside the mounting groove, and the thickness of the second sealing gasket is greater than the depth of the mounting groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The flange with multiple sealing structures proposed in the present invention forms a plug ring integrally on the inner ring surface of the flange body, and opens a reserved groove on the outer ring surface of the plug ring, and sets and fixes a sealing sleeve, so that the sealing sleeve can be clamped between the plug ring and the pipeline to produce elastic deformation, thereby enhancing the sealing performance of the flange body after being connected to the pipeline. At the same time, the design of the sealing sleeve can also adapt to the changes in the diameters of different pipelines, thereby improving the adaptability and stability of the seal. The flange structure adopts an integrated design. During installation, it is only necessary to fix the flange body on the pipeline, and then weld and tighten the bolts. The operation is simple and quick. At the same time, since the sealing sleeve and the sealing gasket are made of elastic materials and have a certain self-repairing ability, even if they are slightly damaged during use, they can maintain good sealing performance and extend the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a schematic diagram of the back of the structure of the present invention;

[0016] Figure 3 It is a front view of the structure of the present invention;

[0017] Figure 4 for Figure 3 Structural cross-section view at AA in the middle;

[0018] Figure 5 for Figure 4 A schematic diagram of the structure enlargement in the middle;

[0019] Figure 6 It is a schematic diagram of the connection structure of the traction sleeve and the sealing pad of the present invention;

[0020] Figure 7 It is a schematic diagram of the connection structure between the flange body and the plug ring of the present invention.

[0021] In the figure: flange body 1, bolt hole 2, plug ring 3, reserved groove 4, sealing sleeve 5, traction sleeve 6, sealing gasket 1 7, limiting sleeve 8, through hole 9, bolt fastening sleeve 10, embedded groove 11, sealing gasket 2 12, segmented groove 13. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-Figure 7 (The reason why the one-piece molded structures are marked with different shadows in the accompanying drawings is to facilitate the distinction of the cross-sectional shapes of different structures, and the materials used for the one-piece molding are the same). The present invention provides a technical solution: a flange with a multiple sealing structure, comprising a flange body 1, a plurality of bolt holes 2 are provided on the surface of the flange body 1, a plug ring 3 is integrally formed on the inner ring surface of the flange body 1, a sealing sleeve 5 is sleeved on the end of the plug ring 3 away from the flange body 1, a reserved groove 4 is provided on the outer ring surface of the end of the plug ring 3 away from the flange body 1, the sealing sleeve 5 is sleeved and fixed in the reserved groove 4, and the outer ring diameter of the sealing sleeve 5 is larger than the outer ring diameter of the plug ring 3.

[0024] When in use, the plug ring 3 is inserted into the pipe mouth of the pipeline. At this time, the sealing sleeve 5 is clamped between the plug ring 3 and the pipeline to produce elastic deformation, thereby improving the sealing performance of the flange body 1 and the pipeline after connection. The flange body 1 is leaned against the end of the pipeline, and the joint seam of the flange body 1 and the pipeline is welded and fixed.

[0025] The inner ring surface of the sealing sleeve 5 is integrally formed with a traction sleeve 6, and the traction sleeve 6 is a "T"-shaped circular tube. One end of the traction sleeve 6 blocks the end of the plug ring 3 away from the flange body 1, and the other end of the traction sleeve 6 passes through the inner ring opening of the plug ring 3, and the outer ring surface of the other end of the traction sleeve 6 is fixed in the inner ring surface of the plug ring 3. The end of the traction sleeve 6 away from the sealing sleeve 5 is integrally formed with a sealing gasket 7, and the sealing gasket 7 is fixed on the surface of the flange body 1. The inner ring diameter of the sealing gasket 7 is equal to the inner ring diameter of the traction sleeve 6. The outer ring surface of the sealing gasket 7 is integrally formed with a limiting sleeve 8, and the limiting sleeve 8 is sleeved on the outer side of the flange body 1.

[0026] When in use, the flange body 1 is fixed to the pipeline. After the two groups of pipelines are installed with the flange body 1, they are fixed with bolts. After the flange bodies 1 at the two ends of the pipeline are put together and tightened by bolts, the sealing gasket 7 between the two flange bodies 1 is compressed and deformed, thereby improving the sealing performance of the two groups of flange bodies 1 after being connected.

[0027] The sealing gasket 7 is provided with a plurality of through holes 9, and a bolt fastening sleeve 10 is integrally formed inside the through hole 9. The bolt fastening sleeve 10 is inserted into the bolt hole 2. The through hole 9 and the bolt hole 2 correspond one to one. The bolt fastening sleeve 10 is a "T"-shaped circular tube. The tube length of the bolt fastening sleeve 10 is greater than the depth of the bolt hole 2, and the outer ring diameter of one end of the bolt fastening sleeve 10 passing through the bolt hole 2 is greater than the hole diameter of the bolt hole 2.

[0028] During use, when the bolts pass through the bolt holes 2 on the surfaces of the two sets of flange bodies 1, the bolt tightening sleeve 10 is clamped between the screw rod and the bolt hole 2 to produce elastic deformation to prevent the screw rod from loosening in the bolt hole 2, and then the bolts are tightened. As long as the bolts are not loose, the two sets of flange bodies 1 can be firmly connected, that is, the sealing performance of the installation of the flange body 1 is improved.

[0029] A segmented groove 13 is provided on the surface of the sealing gasket 7, and the segmented groove 13 is an annular groove. There are two segmented grooves 13, and the sizes of the two segmented grooves 13 are different; to avoid local rupture of the sealing gasket 7 from spreading to the entire sealing gasket 7, an embedding groove 11 is provided on the side of the flange body 1 away from the sealing gasket 7, and the embedding groove 11 is an annular groove. A sealing gasket 2 12 is fixed inside the embedding groove 11, and the thickness of the sealing gasket 2 12 is greater than the depth of the embedding groove 11, that is, after the flange body 1 is leaned against one end of the pipeline, in addition to the sealing of the weld seam, the sealing gasket 2 12 squeezed between the pipeline and the flange body 1 also plays a sealing role.

[0030] The detailed use process of the flange with multiple sealing structure is as follows:

[0031] 1. Basic structure description

[0032] Flange body 1: It is the main part of the flange, and its surface is provided with multiple bolt holes 2, which are used to connect two flanges. Plug ring 3: It is integrally formed on the inner ring surface of the flange body 1, and is used to be inserted into the pipe mouth of the pipeline. Reserved groove 4: It is provided on the outer ring surface of the plug ring 3 away from the flange body 1, and is used to install the sealing sleeve 5. Sealing sleeve 5: It is set in the reserved groove 4, and its outer ring diameter is larger than the outer ring diameter of the plug ring 3, and is used to enhance the sealing between the flange and the pipeline.

[0033] 2. Pipeline connection and preliminary sealing

[0034] Insert the plug ring 3 into the pipeline: insert the plug ring 3 of the flange body 1 into the pipe mouth of the pipeline. Elastic deformation of the sealing sleeve 5: at this time, the sealing sleeve 5 is clamped between the plug ring 3 and the pipeline, and produces elastic deformation, thereby filling the small gap between the two and improving the sealing performance. Positioning and welding of the flange body 1: the flange body 1 is placed against the end of the pipeline, and the joint between the flange body 1 and the pipeline is fixed by welding.

[0035] 3. Connection and sealing between flanges

[0036] Function of the gasket 7: After the two flange bodies 1 are installed at the ends of the two sets of pipes, they are connected together by bolts. At this time, the gasket 7 between the two flange bodies 1 is deformed by pressure, further enhancing the sealing between the two sets of flanges. Function of the bolt fastening sleeve 10: There is a bolt fastening sleeve 10 inside the through hole 9 opened on the gasket 7. When the bolt passes through the bolt hole 2, the bolt fastening sleeve 10 is clamped between the bolt and the bolt hole 2 to prevent the bolt from loosening, thereby ensuring the firmness and sealing of the flange connection.

[0037] 4. Enhanced design of sealing gasket

[0038] Design of segmented groove 13: The segmented grooves 13 (two, different sizes) opened on the gasket 1 can prevent the gasket 1 from spreading to the entire gasket when a local rupture occurs, thereby improving the durability and reliability of the gasket. Enhanced sealing of gasket 2 12: The flange body 1 is provided with an embedding groove 11 on the side away from the gasket 1 7, and a gasket 2 12 is fixed inside. When the flange body 1 is against one end of the pipeline, in addition to the sealing of the weld seam, the gasket 2 12 is also squeezed between the pipeline and the flange body 1, playing an additional sealing role.

[0039] 5. Comprehensive effects and effects

[0040] Multiple sealing structure: Through the preliminary sealing of the plug ring 3 and the sealing sleeve 5, the sealing of the sealing gasket 17 and its bolt fastening sleeve 10 between the flanges, and the enhanced sealing of the sealing gasket 2 12, the flange realizes a multiple sealing structure, which greatly improves the sealing between the flange and the pipeline and between the two flanges. Firm installation: The design of the bolt fastening sleeve 10 prevents the bolts from loosening, thereby ensuring the firmness and stability of the flange installation. Durability: The design of the segmented groove 13 improves the durability of the sealing gasket 17 and extends the service life of the flange. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flange with a multiple sealing structure, comprising a flange body (1), a surface of the flange body (1) being provided with a plurality of bolt holes (2), characterized in that: The inner annular surface of the flange body (1) is integrally formed with a plug ring (3); the end of the plug ring (3) away from the flange body (1) is sleeved with a sealing sleeve (5); the inner annular surface of the sealing sleeve (5) is integrally formed with a traction sleeve (6); the end of the traction sleeve (6) away from the sealing sleeve (5) is integrally formed with a sealing gasket (7); the sealing gasket (7) is fixed to the surface of the flange body (1); a plurality of through holes (9) are opened in the sealing gasket (7); a bolt fastening sleeve (10) is integrally formed inside the through hole (9); the bolt fastening sleeve (10) is inserted into the bolt hole (2).

2. The flange with a multiple sealing structure according to claim 1, characterized in that: A reserved groove (4) is provided on the outer ring surface of the end of the plug ring (3) away from the flange body (1), and a sealing sleeve (5) is sleeved and fixed in the reserved groove (4), and the outer ring diameter of the sealing sleeve (5) is larger than the outer ring diameter of the plug ring (3).

3. The flange with a multiple sealing structure according to claim 1, characterized in that: The traction sleeve (6) is a T-shaped circular tube, one end of the traction sleeve (6) is blocked at the end of the plug ring (3) away from the flange body (1), the other end of the traction sleeve (6) passes through the inner ring opening of the plug ring (3), and the outer ring surface of the other end of the traction sleeve (6) is fixed in the inner ring surface of the plug ring (3).

4. The flange with a multiple sealing structure according to claim 1, characterized in that: The inner ring diameter of the sealing gasket 1 (7) is equal to the inner ring diameter of the traction sleeve (6), and the outer ring surface of the sealing gasket 1 (7) is integrally formed with a limiting sleeve (8), and the limiting sleeve (8) is sleeved on the outer side of the flange body (1).

5. The flange with a multiple sealing structure according to claim 1, characterized in that: The through holes (9) correspond to the bolt holes (2) one by one, the bolt fastening sleeve (10) is a T-shaped circular tube, the tube length of the bolt fastening sleeve (10) is greater than the depth of the bolt hole (2), and the outer ring diameter of one end of the bolt fastening sleeve (10) passing through the bolt hole (2) is greater than the hole diameter of the bolt hole (2).

6. The flange with a multiple sealing structure according to claim 1, characterized in that: The surface of the sealing gasket 1 (7) is provided with a segmented groove (13), the segmented groove (13) is an annular groove, there are two segmented grooves (13), and the sizes of the two segmented grooves (13) are different.

7. The flange with a multiple sealing structure according to claim 1, characterized in that: The flange body (1) is provided with an embedding groove (11) on a side away from the sealing gasket 1 (7), the embedding groove (11) is an annular groove, a sealing gasket 2 (12) is fixed inside the embedding groove (11), and the thickness of the sealing gasket 2 (12) is greater than the depth of the embedding groove (11).

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