Flange sealing gasket structure

Abstract

The utility model discloses a flange sealing gasket structure which comprises a framework ring. Silica gel air bag rings are arranged on the inner edges of the front side and the rear side of each framework ring, first sealing rings are arranged on the opposite faces of the two silica gel air bag rings, telescopic columns which are evenly distributed are arranged between the first sealing rings and the adjacent framework rings, and corrosion-resistant inner rings are arranged on the inner arc faces of the framework rings. Springs which are evenly distributed are arranged between the first sealing rings and the framework ring, the springs are movably connected with the outer ends of the adjacent telescopic columns in a sleeving mode, second sealing rings are arranged on the outer edges of the front side and the rear side of the framework ring, and the inner arc faces of the second sealing rings make contact with the outer arc faces of the adjacent first sealing rings. The silica gel air bag ring is pressed, so that rebound pressure is always applied to the sealing ring through gas counter-acting force, the sealing part is always attached to the flange, and the sealing effect of the device on flange connection is improved.

Description

Technical Field

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

[0002] Flanges are parts that connect shafts to each other and are used to connect pipe ends. Flanges are also used on equipment inlets and outlets to connect two devices. When two flanges are connected, the two flange sealing surfaces need to be sealed with gaskets, and then the flanges are tightened with bolts. Some flange gasket structures use graphite gaskets to seal the two flanges. However, graphite gaskets are prone to oxidation failure after long-term use. Because it is a compression seal, the oxidized and failed graphite gasket itself does not have resilience, which can easily lead to a sealing gap between the flange and the graphite gasket, affecting the sealing effect of the device on the flange. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a flange sealing gasket structure. The device utilizes the pressure of the silicone airbag ring to always apply rebound pressure to the sealing ring through the gas reaction force, so that the sealing part is always in contact with the flange, thereby improving the sealing effect of the device on the flange connection, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flange sealing gasket structure, including a skeleton ring;

[0005] Skeleton ring: Silicone airbag rings are provided on the inner edges of the front and rear sides, and the opposite surfaces of the two silicone airbag rings are provided with a first sealing ring. Evenly distributed telescopic columns are provided between the first sealing ring and the adjacent skeleton ring. The inner arc surface of the skeleton ring is provided with a corrosion-resistant inner ring. The device utilizes the pressure of the silicone airbag ring to always apply rebound pressure to the sealing ring through the reaction force of the gas, so that the sealing part is always in contact with the flange, thereby improving the sealing effect of the device on the flange connection.

[0006] Furthermore, evenly distributed springs are provided between the first sealing ring and the skeleton ring, and the springs are movably sleeved with the outer ends of adjacent telescopic columns. The compression elastic force of the springs facilitates elastic stroke reset of the first sealing ring when the sealing gasket is removed later.

[0007] Furthermore, second sealing rings are provided at the outer edges of both the front and rear sides of the skeleton ring, and the inner arc surfaces of the second sealing rings are in contact with the outer arc surfaces of the adjacent first sealing rings, so as to seal the outer edge of the contact surface between the sealing gasket and the flange.

[0008] Furthermore, evenly distributed threaded through holes are provided at the outer edges of the second sealing ring and the skeleton ring to avoid interference with the tightening of the two flanges by bolts.

[0009] Furthermore, the first sealing ring and the second sealing ring are both polyurethane sealing rings, which have good wear resistance and are not easy to deform, thereby increasing the service life of the sealing gasket.

[0010] Furthermore, a guide outer ring is provided on the outer arc surface of the skeleton ring to facilitate axial alignment of the sealing gasket and the flange.

[0011] Furthermore, the corrosion-resistant inner ring is a nickel-based corrosion-resistant alloy ring, which provides corrosion-resistant protection for the connecting portion between the interior of the sealing gasket and the flange.

[0012] Compared with the prior art, the beneficial effects of the utility model are: the flange sealing gasket structure has the following advantages:

[0013] The sealing gasket is moved to the flange sealing surface, and then the two flanges are connected and fixed by bolts. As the bolts are gradually tightened, the contact surface gap between the two flanges is gradually reduced, and the first sealing ring is squeezed into contact with the flange to seal the flange connection. As the bolts continue to be tightened, the silicone airbag ring is compressed, its own volume is reduced, and the internal air pressure increases. The reverse force of the air pressure exerts pressure on the corresponding first sealing ring, so that the first sealing ring is always in close contact with the adjacent flange, avoiding the increase of the sealing gap between the sealing ring and the flange due to oxidation failure of the sealing ring and the lack of resilience, thereby improving the sealing effect of the device on the flange connection. The flange sealing gasket structure utilizes the pressure of the silicone airbag ring to always apply rebound pressure to the sealing ring through the gas reaction force, so that the sealing part is always in contact with the flange, thereby improving the sealing effect of the device on the flange connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0016] Figure 3 This is an enlarged structural diagram of point A of the utility model.

[0017] In the figure: 1 skeleton ring, 2 silicone airbag ring, 3 first sealing ring, 4 telescopic column, 5 spring, 6 second sealing ring, 7 guide outer ring, 8 corrosion-resistant inner ring, 9 threaded through hole. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-3 ,This embodiment provides a technical solution: a flange sealing gasket structure, including a skeleton ring 1;

[0020] Skeleton ring 1: Silicone airbag rings 2 are provided at the inner edges of the front and rear sides, and the opposite surfaces of the two silicone airbag rings 2 are provided with first sealing rings 3. Uniformly distributed telescopic columns 4 are provided between the first sealing rings 3 and the adjacent skeleton rings 1. The inner arc surface of the skeleton ring 1 is provided with a corrosion-resistant inner ring 8. Uniformly distributed springs 5 ​​are provided between the first sealing ring 3 and the skeleton ring 1. The springs 5 ​​are movably connected to the outer ends of the adjacent telescopic columns 4. Second sealing rings 6 are provided at the outer edges of the front and rear sides of the skeleton ring 1. The inner arc surface of the second sealing ring 6 is in contact with the outer arc surface of the adjacent first sealing ring 3. The outer edges of the second sealing ring 6 and the skeleton ring 1 There are evenly distributed threaded through holes 9 at each end, the first sealing ring 3 and the second sealing ring 6 are both polyurethane sealing rings, and a guide outer ring 7 is provided on the outer arc surface of the skeleton ring 1. When the device is used to seal the flange connection, the inner arc surface of the guide outer ring 7 is first sleeved to the outer side of the sealing surface of a flange, so that the sealing gasket and the flange are axially aligned, and the corrosion-resistant inner ring 8 contacts the inner wall of the corresponding flange, and then the guide outer ring 7 is rotated along the flange sealing surface to align the threaded through hole 9 with the center of the threaded hole of the flange, and then the two flanges are connected and fixed by bolts. As the bolts are gradually tightened, the contact surface gap between the two flanges is The first sealing ring 6 gradually decreases, and the first sealing ring 6 is in contact with the flange by squeezing, thereby sealing the flange connection. As the bolts continue to be tightened, the silicone airbag ring 2 is compressed, its own volume is reduced, and the internal air pressure increases. The reverse force of the air pressure exerts pressure on the corresponding first sealing ring 3, so that the first sealing ring 3 is always in close contact with the adjacent flange, avoiding the increase of the sealing gap between the sealing ring and the flange due to oxidation failure of the sealing ring and the lack of resilience, thereby improving the sealing effect of the device on the flange connection. At the same time, in this process, the telescopic end of the telescopic column 4 and the spring 5 elastically contract, and the telescopic column 4 is used to press the first sealing ring 3 The longitudinal extrusion guide is performed to avoid the vertical movement of the first sealing ring 3. The compression elastic force of the spring 5 facilitates the elastic stroke reset of the first sealing ring 3 when the sealing gasket is removed later. The outer edge of the contact surface between the sealing gasket and the flange is sealed by the second sealing ring 6. The sealing ring is made of polyurethane material, which has extremely strong wear resistance and is not easy to deform, thereby increasing the service life of the device. The flange sealing gasket structure uses the silicone airbag ring 2 to be compressed so that the gas reaction force always applies rebound pressure to the sealing ring, so that the sealing part is always in contact with the flange, thereby improving the sealing effect of the device on the flange connection;

[0021] Among them, the corrosion-resistant inner ring 8 is a nickel-based corrosion-resistant alloy ring. The corrosion-resistant inner ring 8 is a nickel-based corrosion-resistant alloy ring. The nickel-based corrosion-resistant alloy is composed of Hastelloy and Ni-Cu alloy. Since the metal Ni itself is a face-centered cubic structure, its crystallographic stability enables it to accommodate more alloy elements than Fe, thereby achieving the ability to resist various environments. The corrosion-resistant inner ring 8 is used to provide corrosion-resistant protection for the connecting part between the inside of the sealing gasket and the flange.

[0022] The working principle of a flange sealing gasket structure provided by the utility model is as follows: when using the device to seal the flange connection, firstly, the inner arc surface of the guide outer ring 7 is sleeved onto the outer side of the sealing surface of a flange, so that the sealing gasket and the flange are axially aligned, and the corrosion-resistant inner ring 8 contacts the inner wall of the corresponding flange, and then the guide outer ring 7 is rotated along the flange sealing surface to align the threaded through hole 9 with the center of the threaded hole of the flange, and then the two flanges are connected and fixed by bolts, and as the bolts are gradually tightened, the contact surface gap between the two flanges gradually decreases, and the first sealing ring 6 is squeezed into contact with the flange, thereby sealing the flange connection, and as the bolts continue to be tightened, the silicone airbag ring 2 is pressurized, its own volume is reduced, and the internal air pressure increases, and the corresponding first sealing ring 3 is pressed by the reverse force of the air pressure, so that the first sealing ring 3 is always in close contact with the adjacent flange, avoiding the sealing between the sealing ring and the flange due to oxidation failure and lack of resilience. The gap is increased, thereby improving the sealing effect of the device on the flange connection. At the same time, in this process, the telescopic end of the telescopic column 4 and the spring 5 elastically contract, and the first sealing ring 3 is longitudinally moved and extruded and guided by the telescopic column 4 to avoid vertical movement of the first sealing ring 3. The compression elastic force of the spring 5 facilitates the elastic stroke reset of the first sealing ring 3 when the sealing gasket is removed later, and the outer edge of the contact surface between the sealing gasket and the flange is sealed by the second sealing ring 6. The sealing ring is made of polyurethane material, which has extremely strong wear resistance and is not easy to deform, thereby improving the service life of the device. The corrosion-resistant inner ring 8 is a nickel-based corrosion-resistant alloy ring. The nickel-based corrosion-resistant alloy is made of Hastelloy and Ni-Cu alloy. Since the metal Ni itself is a face-centered cubic structure, its crystallographic stability enables it to accommodate more alloy elements than Fe, thereby achieving the ability to resist various environments, and the corrosion-resistant inner ring 8 is used to provide corrosion-resistant protection for the connecting part between the inside of the sealing gasket and the flange.

[0023] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flange sealing gasket structure, characterized in that: comprising a backbone ring (1); Skeleton ring (1): Silicone airbag rings (2) are provided at the inner edges of the front and rear sides thereof; first sealing rings (3) are provided on the opposite surfaces of the two silicone airbag rings (2); evenly distributed telescopic columns (4) are provided between the first sealing rings (3) and the adjacent skeleton rings (1); and a corrosion-resistant inner ring (8) is provided on the inner arc surface of the skeleton ring (1).

2. A flange sealing gasket structure according to claim 1, characterized in that: Evenly distributed springs (5) are provided between the first sealing ring (3) and the skeleton ring (1), and the springs (5) are movably sleeved with the outer ends of adjacent telescopic columns (4).

3. The flange sealing gasket structure according to claim 1, characterized in that: Second sealing rings (6) are provided at the outer edges of both the front and rear sides of the skeleton ring (1), and the inner arc surface of the second sealing ring (6) is in contact with the outer arc surface of the adjacent first sealing ring (3).

4. A flange sealing gasket structure according to claim 3, characterized in that: The outer edges of the second sealing ring (6) and the skeleton ring (1) are both provided with evenly distributed threaded through holes (9).

5. The flange sealing gasket structure according to claim 3, characterized in that: The first sealing ring (3) and the second sealing ring (6) are both polyurethane sealing rings.

6. The flange sealing gasket structure according to claim 1, characterized in that: The outer arc surface of the skeleton ring (1) is provided with a guide outer ring (7).

7. The flange sealing gasket structure according to claim 1, characterized in that: The corrosion-resistant inner ring (8) is a nickel-based corrosion-resistant alloy ring.

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