Flange gasket

Abstract

The utility model provides a flange gasket and relates to the technical field of sealing gaskets. The flange plate comprises an outer ring part, an interlayer part and an inner ring part which are connected, the outer ring part is sleeved on the outer wall of the circumference of the flange plate, the interlayer part is arranged between the two flange plates and the pipeline, and the inner ring part is attached to the inner wall of the pipeline. The corrosion resistance of the flange is improved, and the service life of the flange is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sealing gasket, specifically relates to a flange gasket. BACKGROUND

[0002] At present, the equipment and pipeline of chemical plant convey corrosive medium, these mediums can cause the flange sealing surface to be corroded and affect the sealing effect, and cause leakage, for example, the solution containing chloride ion can corrode the stainless steel sealing surface, in addition, if the flange sealing surface has a small gap, the medium is easy to accumulate here, thereby accelerating the corrosion.

[0003] In the prior art, once the flange sealing surface is corroded, the sealing surface is restored to be flat after repair welding and machining, or the recess and gap generated by corrosion are filled with a sealing agent to enhance the sealing property, and the sealing surface or the whole flange needs to be replaced in a serious case. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of flange gaskets of improving flange corrosion resistance, prolonging the service life of flange.

[0005] The utility model discloses the following technical scheme realizes:

[0006] A kind of flange gasket, including outer ring part, interlayer part and inner ring part connected, wherein: the outer ring part is sleeved in flange disc circumferential outer wall, the interlayer part is set between two flange disc and pipeline, the inner ring part is pasted on pipeline inner wall.

[0007] Optionally, the interlayer part is arranged between the outer ring part and the inner ring part, and a through hole corresponding to a screw hole of the flange disc is formed at a corresponding position of the interlayer part.

[0008] Optionally, the outer ring part is in the shape of a cylinder, and an inner diameter of the outer ring part is adapted to an outer diameter of the flange disc.

[0009] Optionally, a connecting position of the interlayer part and the outer ring part is in the middle of an axial direction of the outer ring part, and the interlayer part is arranged perpendicular to the axial direction of the outer ring part.

[0010] Optionally, the inner ring part is in the shape of a cylinder, and an outer diameter of the inner ring part is adapted to an inner diameter of the pipeline.

[0011] Optionally, a connecting position of the interlayer part and the inner ring part is in the middle of an axial direction of the inner ring part, and the interlayer part is arranged perpendicular to the axial direction of the inner ring part.

[0012] Optionally, both ends of the inner ring part in the axial direction are bevels, and an inner diameter of the bevels gradually increases from inside to outside of the inner ring part.

[0013] Optionally, an included angle between the bevels and an axial direction of the pipeline is forty-five degrees.

[0014] Optionally, the inclined surface is uneven.

[0015] Optionally, the cross section of the inclined surface is zigzag, and the inclined surface is full of wrinkles in the direction from inside to outside of the inner ring part.

[0016] The utility model discloses the beneficial effect is:

[0017] The inner ring part outer wall is close to the pipeline inner wall, the sandwich layer part is clamped between two flanges, and the positioning ring is sleeved on the outer wall of the circumference of the two flanges, which can effectively prevent corrosive materials from entering the gap between the flanges, achieve the effect of corrosion prevention, and prolong the service life of the flanges.

[0018] The inner ring part end edge located on the pipeline inner wall is inclined, and the inclined surface is uneven, so that when the fluid is conveyed in the pipeline, the thrust exerted by the fluid on the inclined surface generates pressure outward of the inner ring part edge, and the pressure makes the inner ring part edge be pressed on the pipeline inner wall, improving the sealing effect between the inner ring part and the pipeline inner wall.

[0019] The setting of the outer ring part not only serves as the last anti-leakage measure when the flange leaks, reduces or avoids the leakage of the pipeline material to the outside as much as possible, provides valuable time for emergency treatment of personnel, but also prevents external substances from entering between the flanges, and the outer ring part also has the function of auxiliary positioning when the flanges and gaskets are installed, so that the flanges and gaskets are installed accurately. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, without creative labor, other drawings can also be obtained according to these drawings.

[0021] Figure 1 The utility model structural drawing is provided.

[0022] Figure 2 The Figure 1 The enlarged view of A in the figure.

[0023] The drawings are as follows: 1, the outer ring part; 2, the sandwich layer part; 3, the inner ring part; 4, the inclined surface. DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are simply described. As those skilled in the art can realize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are considered to be exemplary in nature rather than limiting.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0026] The embodiments of the present application will be described in detail below with reference to the drawings.

[0027] As shown in Figure 1 and Figure 2 The utility model discloses a flange gasket, including outer ring part 1, interlayer 2 and inner ring part 3, outer ring part 1 is covered in flange disc circumferential outer wall, interlayer 2 is set up between two flange disc and pipeline, and inner ring part 3 is pasted on the inner wall of pipeline.

[0028] Outer ring part 1 is cylindrical, and the inner diameter of outer ring part 1 is adapted to the outer diameter of flange disc.

[0029] Interlayer 2 is connected to the inner wall of outer ring part 1, and the connecting position of interlayer 2 and outer ring part 1 is in the middle of the axial direction of outer ring part 1, so that the cross section of outer ring part 1 and interlayer 2 is T-shaped.

[0030] Inner ring part 3 is cylindrical and coaxial with outer ring part 1, and the outer diameter of inner ring part 3 is adapted to the inner diameter of the pipeline, interlayer 2 is connected to the outer wall of inner ring part 3, and the connecting position of interlayer 2 and inner ring part 3 is in the middle of the axial direction of inner ring part 3, so that the cross section of inner ring part 3 and interlayer 2 is T-shaped.

[0031] Interlayer 2 is perpendicular to the axial direction of outer ring part 1 and inner ring part 3, and interlayer 2 is located between the two flange sealing surfaces, and a through hole corresponding to the flange disc screw hole is formed at a corresponding position on interlayer 2.

[0032] The two end edges of inner ring part 3 in the axial direction are both bevels 4, and the included angle between the bevel 4 and the axial direction of the pipeline is forty-five degrees. In the direction from inside to outside of inner ring part 3, the inner diameter of bevel 4 gradually increases.

[0033] The surface of bevel 4 is uneven, and in this embodiment, the cross section of bevel 4 is sawtooth-shaped, and in the direction from inside to outside of inner ring part 3, bevel 4 is covered with wrinkles.

[0034] The outer ring part 1, the sandwiched layer part 2 and the inner ring part 3 are integrally formed of corrosion-resistant material, or the sandwiched layer part 2 and the inner ring part 3 are integrally formed of corrosion-resistant material, and the outer ring part 1 is made of metal or plastic material; the outer ring part 1 is connected with the sandwiched layer part 2 by means of bonding or riveting, etc.

[0035] The inner wall of the inner ring part 3 is tightly attached to the inner wall of the pipeline, the sandwiched layer part 2 is sandwiched between the two flanges, and the positioning ring is sleeved on the outer wall of the two flanges in the circumferential direction, so that the corrosive material can be effectively prevented from entering the gap between the two flanges, the corrosion prevention effect is achieved, and the service life of the flange is prolonged.

[0036] The end edge of the inner ring part 3 located on the inner wall of the pipeline is in the form of an inclined surface 4, and the inclined surface 4 is uneven, so that when the fluid is conveyed in the pipeline, the pushing force of the fluid on the inclined surface 4 generates a pressure outward of the edge of the inner ring part 3, and the pressure causes the edge of the inner ring part 3 to be pressed against the inner wall of the pipeline, thereby improving the sealing effect between the inner ring part 3 and the inner wall of the pipeline.

[0037] The outer ring part 1 not only serves as the last leakage prevention measure when leakage occurs at the flange, but also reduces or avoids the leakage of the pipeline material to the outside as much as possible, provides valuable time for emergency treatment of personnel, and prevents external substances from entering between the two flanges; in addition, the outer ring part 1 also has the function of assisting positioning when the flange and the gasket are installed, so that the flange and the gasket are accurately installed.

[0038] The above embodiments are only preferred embodiments of the present application, and are not a limitation on the technical solutions of the present application; as long as the technical solutions can be realized on the basis of the above embodiments without creative labor, they should be considered to fall within the scope of protection of the patent of the present application.

Claims

1. A flange gasket, characterized in that, It includes an outer ring, a sandwich, and an inner ring that are connected to each other, wherein: the outer ring is fitted around the outer circumference of the flange, the sandwich is disposed between the two flanges and the pipe, and the inner ring is attached to the inner wall of the pipe.

2. The flange gasket according to claim 1, characterized in that, The interlayer is located between the outer ring and the inner ring, and a through hole corresponding to the flange bolt hole is provided on the interlayer.

3. The flange gasket according to claim 2, characterized in that, The outer ring is cylindrical, and its inner diameter is adapted to the outer diameter of the flange.

4. The flange gasket according to claim 3, characterized in that, The connection between the interlayer and the outer ring is located at the middle of the outer ring in the axial direction, and the interlayer is arranged perpendicular to the axial direction of the outer ring.

5. The flange gasket according to claim 2, characterized in that, The inner ring is cylindrical, and its outer diameter is adapted to the inner diameter of the pipe.

6. The flange gasket according to claim 5, characterized in that, The connection between the interlayer and the inner ring is located at the middle of the axial direction of the inner ring, and the interlayer is arranged perpendicular to the axial direction of the inner ring.

7. The flange gasket according to claim 5, characterized in that, Both ends of the inner ring portion are inclined surfaces in the axial direction, and the inner diameter of the inclined surfaces gradually increases from the inside to the outside of the inner ring portion.

8. The flange gasket according to claim 7, characterized in that, The angle between the inclined plane and the axial direction of the pipe is forty-five degrees.

9. The flange gasket according to claim 8, characterized in that, The surface of the inclined plane is uneven.

10. The flange gasket according to claim 9, characterized in that, The cross-section of the inclined surface is sawtooth-shaped, and the inclined surface is covered with wrinkles in the direction from the inside to the outside of the inner ring.

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