Flange with high sealing performance

Abstract

The utility model relates to a flange with high sealing performance, which comprises a flange assembly and a sealing cover covering the outer side of the flange assembly, the sealing cover comprises a sleeve cover I and a sleeve cover II, one end of the sleeve cover I is hinged with one end of the sleeve cover II, and the other end of the sleeve cover I is detachably connected with the other end of the sleeve cover II. The inner wall of the first sleeve cover and the inner wall of the second sleeve cover are both connected with sealing air cushions, sealing air cavities are formed in the sealing air cushions, the sealing air cushions cover the end faces of the two sides and the peripheral face of the flange assembly, and the sealing air cushions abut against the end faces of the two sides and the peripheral face of the flange assembly to form sealing. The utility model mainly aims to provide the high-sealing flange which is good in sealing performance, remarkable and reliable in effect and convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to a flange, in particular to a high-sealing flange. Background Art

[0002] Flange is also called flange or flange. It is a common connection component used to connect two pipes or two devices. Flange is a disc-shaped part with multiple holes on the edge. Two flanges are tightly connected by bolts. In order to improve the sealing effect, a sealing ring is usually set between the flanges for sealing.

[0003] In the prior art, a Chinese patent with publication number CN 217683776U discloses a sealing flange, which solves the problem that the single sealing ring between the flanges is squeezed and misaligned, which easily leads to poor sealing effect. The technical solution includes a first flange member and a second flange member, one end of the first flange member is connected to the second flange member, the first flange member includes a first flange ring, and one end of the first flange ring is fixedly connected to the first flange pipe. The technical solution has a first sealing ring located between the first flange ring and the second flange ring to play a sealing role, and the second sealing ring plays a sealing role in the contact end face between the annular groove and the annular convex ring. Under such a double sealing effect, the flange structure of the device has a good sealing effect, and the cross-sections between the first sealing ring and the second sealing ring and the corresponding first sealing groove and the second sealing groove are both trapezoidal structures, so that the first sealing ring and the second sealing ring will not be misaligned when squeezed, thereby further improving the sealing effect. However, when the first flange member and the second flange member of the technical solution become loose and the gap becomes larger, the sealing performance will still decrease, and the problem of pipeline leakage is still prone to occur. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide a high-seal flange with good sealing performance, significant and reliable effect, and convenient disassembly and assembly.

[0005] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] A high-sealing flange comprises a flange assembly and a sealing cover arranged on the outside of the flange assembly, the sealing cover comprising cover one and cover two, one end of cover one is hinged to one end of cover two, the other end of cover one is detachably connected to the other end of cover two, sealing air cushions are connected to the inner walls of cover one and cover two, a sealing air cavity is arranged inside the sealing air cushions, the sealing air cushions are covered on both side end faces and the outer peripheral surface of the flange assembly, and the sealing air cushions abut against both side end faces and the outer peripheral surface of the flange assembly to form a seal.

[0007] Furthermore, the sealing air cushion includes two side air cushions and a middle air cushion connected between the two side air cushions, the outer surfaces of the two side air cushions respectively abut against the two side end surfaces of the flange assembly, and the outer surface of the middle air cushion abuts against the outer peripheral surface of the flange assembly.

[0008] Furthermore, the outer surface of the side air cushion is an uneven wavy structure.

[0009] Furthermore, the middle air cushion is provided with a protrusion protruding outwards.

[0010] Furthermore, the sealing cover and the flange assembly are connected and fixed by a plurality of connecting bolts.

[0011] Furthermore, one end of the cover one is hinged to one end of the cover two through a hinge shaft, and the other end of the cover two extends outward to form an extension portion, and the extension portion is fixed to the other end of the cover one through a connecting bolt.

[0012] Furthermore, the flange assembly includes a flange component 1 and a flange component 2 connected by bolts, and a gap between two opposite end surfaces of the flange component 1 and the flange component 2 corresponds to a position of the raised portion.

[0013] Furthermore, two opposite end surfaces of flange member 1 and flange member 2 are respectively provided with groove 1 and groove 2, the cross-sectional structure of groove 1 is a convex structure, and sealing rings are engaged and clamped in groove 1 and groove 2.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, a clamping sealing ring is provided between flange part one and flange part two to seal the gap therebetween; when the gap between flange part one and flange part two becomes larger and the sealing performance of the sealing ring is greatly reduced, the sealing cover is sealed by a sealing air cushion provided on the sealing cover, thereby effectively preventing the gas in the pipeline from leaking from the gap between flange part one and flange part two, thereby improving the sealing effect and stability, and the sealing cover is easy to disassemble and assemble, and the structure is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of a high-sealing flange of the utility model;

[0016] Figure 2 This is a front view of a high-sealability flange of the utility model;

[0017] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure cut along the AA direction;

[0018] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;

[0019] Among them, 1. flange assembly; 11. flange part 1; 111. groove 1; 12. flange part 2; 121. groove 2; 2. sealing cover; 21. sleeve cover 1; 22. sleeve cover 2; 221. extension part; 3. air nozzle; 4. connecting bolt; 5. flange bolt hole; 6. sealing ring; 7. sealing air cushion; 71. side air cushion; 72. middle air cushion; 721. raised part. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] It should be noted that, in the description of the technical solution of the present invention, some directional words used to clearly describe the technical features of the present invention, such as "front", "back", "up", "down", "top", "bottom", "inside", "outside", etc., are all in accordance with the orientation of the drawings of the present invention.

[0022] Example

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, a high-sealing flange of this embodiment includes a flange assembly 1 and a sealing cover 2 arranged on the outside of the flange assembly 1. The flange assembly 1 includes a flange part 11 and a flange part 2 12 connected by bolts. The bolt connection between the flange part 11 and the flange part 2 12 is a common technical means in the prior art and will not be described in detail here. The two opposite end surfaces of the flange part 11 and the flange part 2 12 are respectively provided with a groove 111 and a groove 2 121. The groove 111 and the groove 2 121 are both sealing annular structures. The cross-sectional structure of the groove 111 is a convex structure. The groove 111 and the groove 2 121 are matched with a sealing ring 6, and the cross-sectional shape of the sealing ring 6 matches the cross-sectional shape of the groove 111 and the groove 2 121. One side of the sealing ring 6 is clamped in the groove 111 to prevent the sealing ring 6 from being dislocated due to extrusion.

[0024] The sealing cover 2 is connected and fixed to the flange assembly 1 by at least two spaced connection bolts 4. The cross section of the sealing cover 2 is a "["-shaped structure. The two side walls correspond to the two opposite end faces of the flange assembly 1, and the bottom wall connected between the two side walls corresponds to the outer circumferential surface of the flange assembly 1. The sealing cover 2 includes a cover 1 21 and a cover 2 22. One end of the cover 1 21 is hinged to one end of the cover 2 22, and the other end of the cover 1 21 is detachably connected to the other end of the cover 2 22. Specifically in this embodiment, one end of the cover 1 21 is hinged to one end of the cover 2 22 by a hinge shaft, and the other end of the cover 2 22 extends outward to form an extension portion 221. The extension portion 221 is connected and fixed to the other end of the cover 1 21 by a connection bolt 4. During installation, cover 1 21 and cover 2 22 are put on the outside of flange assembly 1, and cover 1 21 and cover 2 22 are respectively connected and fixed to flange assembly 1 by connecting bolts 4, and the connecting bolts 4 are passed through the extension part 221 and the end of cover 1 21 to connect and fix the two.

[0025] In order to improve the sealing effect of the flange assembly 1, in this embodiment, a sealing air cushion 7 is connected to the inner wall of the cover 1 21 and the cover 2 22. Figure 4 As shown, a sealing air cavity is provided inside the sealing air cushion 7, and the sealing air cavity is connected with the air nozzle 3. When gas is introduced into the air nozzle 3, the sealing air cavity expands. The sealing air cushion 7 is coated on both side end faces and the outer peripheral surface of the flange assembly 1, and the sealing air cushion 7 abuts against both side end faces and the outer peripheral surface of the flange assembly 1 to form a seal.

[0026] Specifically, the sealing air cushion 7 includes two side air cushions 71 and a middle air cushion 72 connected between the two side air cushions 71. The outer surfaces of the two side air cushions 71 are respectively in contact with the two side end surfaces of the flange assembly 1, and the outer surface of the middle air cushion 72 is in contact with the outer peripheral surface of the flange assembly 1. The outer surface of the side air cushion 71 is an uneven wavy structure. With this design, the wavy structure is respectively in contact with the end surface of the flange assembly 1 to form multiple seals, and the leakage prevention effect is better. A protruding portion 721 protruding outward is provided on the middle air cushion 72. The gap between the two opposite end surfaces of the flange component 11 and the flange component 2 12 corresponds to the position of the protruding portion 721.

[0027] When the flange assembly 1 becomes loose due to long-term use or vibration, the gap between flange part 11 and flange part 2 12 will become larger, resulting in a serious decrease in sealing performance. In order to solve this problem, the present embodiment provides a sealing cover 2 on the outer cover of the flange assembly 1. When the flange assembly 1 becomes loose and the gap between flange part 11 and flange part 2 12 becomes larger, the two end faces of the flange assembly 1 that are opposite to each other move away from each other, thereby applying pressure to the two side air cushions 71 in the sealing air cushion 7 that abut against it. The side air cushion 71 is compressed and deformed under pressure, and the gas enters the middle air cushion 72 to expand and enlarge it, tightly abutting against the outer circumferential surface of the flange assembly 1, thereby enhancing the sealing performance. At the same time, the raised portion 721 also expands accordingly, sealing the enlarged gap, and further improving the sealing performance. The material of the sealing air cushion 7 of the present embodiment can be selected from rubber or silicone with good expansion and deformation and pressure resistance characteristics.

[0028] The utility model discloses a high-sealing flange, in which a clamping sealing ring 6 is provided between flange part 11 and flange part 2 12, for sealing the gap therebetween; when the gap between flange part 11 and flange part 2 12 becomes larger and the sealing performance of the sealing ring 6 is greatly reduced, the sealing gas cushion 7 provided on the sealing cover 2 is used to seal the gap, thereby effectively preventing the gas in the pipeline from leaking from the gap between flange part 11 and flange part 2 12, thereby improving the sealing effect and stability; the sealing cover 2 is easy to disassemble and assemble, and the structure is reliable.

[0029] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model.

Claims

1. A high sealing flange, characterized in that: The invention comprises a flange assembly (1) and a sealing cover (2) which is arranged on the outside of the flange assembly (1), wherein the sealing cover (2) comprises a cover 1 (21) and a cover 2 (22), wherein one end of the cover 1 (21) is hinged to one end of the cover 2 (22), and the other end of the cover 1 (21) is detachably connected to the other end of the cover 2 (22), and the inner walls of the cover 1 (21) and the cover 2 (22) are both connected to sealing air cushions (7), wherein a sealing air cavity is arranged inside the sealing air cushions (7), and the sealing air cushions (7) are covered on both side end surfaces and the outer peripheral surface of the flange assembly (1), and the sealing air cushions (7) are in contact with both side end surfaces and the outer peripheral surface of the flange assembly (1) to form a seal.

2. A high sealing flange according to claim 1, characterized in that: The sealing air cushion (7) comprises two side air cushions (71) and a middle air cushion (72) connected between the two side air cushions (71); the outer surfaces of the two side air cushions (71) respectively abut against the two side end surfaces of the flange assembly (1); and the outer surface of the middle air cushion (72) abuts against the outer peripheral surface of the flange assembly (1).

3. A high sealing flange according to claim 2, characterized in that: The outer surface of the side air cushion (71) is an uneven wavy structure.

4. A high sealing flange according to claim 2 or 3, characterized in that: The middle air cushion (72) is provided with a protruding portion (721) protruding outwards.

5. The high sealing flange according to claim 1, characterized in that: The sealing cover (2) and the flange assembly (1) are connected and fixed via a plurality of connecting bolts (4).

6. The high sealing flange according to claim 5, characterized in that: One end of the cover one (21) is hinged to one end of the cover two (22) via a hinge shaft, the other end of the cover two (22) extends outward to form an extension portion (221), and the extension portion (221) is connected and fixed to the other end of the cover one (21) via a connecting bolt (4).

7. The high sealing flange according to claim 4, characterized in that: The flange assembly (1) comprises a flange component 1 (11) and a flange component 2 (12) connected by bolts, and the gap between two opposite end surfaces of the flange component 1 (11) and the flange component 2 (12) corresponds to the position of the protrusion (721).

8. The high sealing flange according to claim 7, characterized in that: Two opposite end surfaces of the flange member 1 (11) and the flange member 2 (12) are respectively provided with a groove 1 (111) and a groove 2 (121); the cross-sectional structure of the groove 1 (111) is a convex structure; and sealing rings (6) are fitted and clamped in the grooves 1 (111) and 2 (121).

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