Flange gasket with high frictional resistance

Abstract

The utility model relates to the technical field of flange gaskets, in particular to a flange gasket with high frictional resistance. The high-friction-resistance flange gasket is suitable for locking a large-specification flange, and the friction resistance is increased by improving the roughness of a contact surface. The flange gasket is formed by vulcanizing eight flange gasket sections in a surrounding manner; linear protrusions are arranged on the two sides of the top surface of the flange gasket section in the radial direction, and three sets of hexagonal protrusions are evenly distributed between the linear protrusions on the two sides and located in the circumferential direction of the top surface of the flange gasket section. When adjacent flange pad sections are in butt joint, the side surfaces of every two adjacent linear protrusions are connected and vulcanized into a whole. A frosted layer is arranged on the top surface of the hexagonal protrusion. Due to the hexagonal structure on the surface, the stress part of the locking mechanism can be increased, the convex patterns deform, and high normal pressure can be generated; and the roughness of the contact surface can be greatly improved through surface frosted treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of flange gaskets, in particular to a flange gasket with high friction resistance. Background Art

[0002] At present, commonly used flange gaskets are mainly made of standard industrial rubber sheets. When used to make flange gaskets for large equipment, the outer diameter can reach more than Φ2000mm. When such large-sized flanges are installed, problems such as insufficient locking force and flange gaskets slipping out may occur. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a flange gasket with high friction resistance suitable for locking large-size flanges in view of the deficiencies in the prior art, and to increase the friction resistance by improving the roughness of the contact surface.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a flange gasket with high friction resistance, the flange gasket is vulcanized around eight flange gasket segments; linear protrusions are radially provided on both sides of the top surface of the flange gasket segment, and three groups of hexagonal protrusions are evenly distributed in the circumferential direction of the top surface of the flange gasket segment between the linear protrusions on both sides; when adjacent flange gasket segments are butt-jointed, the side surfaces of two adjacent linear protrusions are connected and vulcanized into one; the top surface of the hexagonal protrusion is provided with a frosted layer.

[0005] Furthermore, the top surface of the linear protrusion is evenly provided with friction strips having the same angle as the arc edge of the flange gasket segment.

[0006] Furthermore, an inner concave portion is provided on the top surface of the linear protrusion, and a linear contact portion I and a linear contact portion II are formed at the junction of the inner concave portion and the top surfaces on both sides of the linear protrusion. The friction strip is placed above the inner concave portion, and the two ends of the friction strip are respectively connected to the linear contact portion I and the linear contact portion II, and the top surface of the friction strip is flush with the linear contact portion I and the linear contact portion II.

[0007] Furthermore, the top surface of the friction strip is flush with the top surface of the frosted layer.

[0008] Furthermore, each group of the hexagonal protrusions has three hexagonal shapes evenly distributed in the radial direction and eighty hexagonal shapes evenly distributed in the circumferential direction.

[0009] The advantages of the flange gasket with high friction resistance of the utility model are:

[0010] 1. For large-size flange gaskets, such as Φ2100mm flange gaskets, they are divided into 8 flange gasket segments and made separately, and then the 8 segments are vulcanized into one piece, that is, the angle of each flange gasket segment is 45°; three groups of hexagonal protrusions are designed on the top surface of the flange gasket segment, each group of hexagonal protrusions has three hexagonal shapes evenly distributed in the radial direction and eighty hexagonal shapes evenly distributed in the circumferential direction, which can increase the contact points with the locking mechanism and increase the normal pressure; a frosted layer is designed on the top surface of the hexagonal protrusion to increase the roughness of the contact surface and increase the friction resistance.

[0011] 2. The evenly distributed hexagonal protrusions can produce a large deformation when the locking mechanism is pressurized, increasing the local contact points between the flange gasket and the locking mechanism. In this way, the rubber molecular chain slips due to deformation, thereby generating friction resistance; the surface particles of the frosted layer greatly increase the roughness of the flange gasket and increase the friction; the flange gasket sections connected to each other are connected by straight protrusions, and the direct protrusions form a line contact type to increase friction. When the locking mechanism is pressurized, it can be deformed, and the friction strip is flush with the hexagonal protrusions to ensure synchronous rubber deformation and increase friction resistance.

[0012] 3. High friction coefficient rubber material itself has strong adhesion, which improves friction resistance; the hexagonal structure on the surface can increase the force-bearing parts of the locking mechanism, and the raised pattern deforms to produce higher normal pressure; the surface frosting treatment can greatly increase the roughness of the contact surface. This new structure flange gasket can play a role in shock absorption and sealing, especially for large equipment, it can significantly improve the locking force and ensure installation requirements; and it has the advantages of being simple and compact, easy to install and disassemble, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure of a single flange gasket section of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the hexagonal protrusion with a frosted layer of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of a single linear raised friction strip of the utility model;

[0017] Figure 5 This is a schematic diagram of the inner concave structure of a single linear protrusion of the utility model;

[0018] Figure 6 It is a schematic diagram of the main structure of the linear raised part of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1-6 As shown:

[0025] The locking force between the flange gasket and the locking mechanism mainly depends on the static friction between the two. Therefore, in order to prevent problems during installation, a flange gasket with high friction resistance and a frosted pattern structure is designed; this flange gasket is made of rubber material, preferably silicone rubber with a high friction coefficient.

[0026] A flange gasket with high friction resistance, the flange gasket is formed by vulcanization around eight flange gasket segments 1; linear protrusions 2 are radially arranged on both sides of the top surface of the flange gasket segment 1, and three groups of hexagonal protrusions 3 are evenly distributed in the circumferential direction of the top surface of the flange gasket segment 1 between the linear protrusions 2 on both sides; when two adjacent flange gasket segments 1 are butt-jointed, the side surfaces of the two adjacent linear protrusions 2 are connected and vulcanized into one; and a frosted layer 4 is arranged on the top surface of the hexagonal protrusion 3.

[0027] According to the friction calculation formula Ff=µ * Fn normal pressure, the main factors affecting friction are the contact surface roughness and the contact surface normal pressure. Therefore, by designing a mold with a certain roughness, specifically, using 60 mesh, 80 mesh or 100 mesh diamond sand to process the mold according to actual working conditions, a frosted flange gasket can be produced.

[0028] This new type of structural flange gasket can play the role of shock absorption and sealing. Especially for large equipment, it can significantly improve the locking force and ensure the installation requirements. It also has the advantages of being simple and compact, easy to install and disassemble, and having a long service life.

[0029] According to the requirements of the operating conditions and the sealing medium, when the material strength is required to be >15MPa and the sealing gas is required, EPDM rubber can be used; when the material strength is required to be >5MPa and the sealing gas is required, silicone rubber can be used; when sealing oil media, hydrogenated nitrile rubber can be used.

[0030] Furthermore, friction strips 5 having an angle consistent with the arc edge of the flange gasket segment 1 are evenly distributed on the top surface of the linear protrusion 2 .

[0031] Furthermore, an inner recess 21 is provided on the top surface of the linear protrusion 2, and a linear contact portion I22 and a linear contact portion II23 are formed at the junction of the inner recess 21 and the top surfaces on both sides of the linear protrusion 2. The friction strip 5 is placed above the inner recess 21, and the two ends of the friction strip 5 are respectively connected to the linear contact portion I22 and the linear contact portion II23, and the top surface of the friction strip 5 is flush with the linear contact portion I22 and the linear contact portion II23.

[0032] Furthermore, the top surface of the friction strip 5 is flush with the top surface of the frosting layer 4 .

[0033] Furthermore, each group of hexagonal protrusions 3 has three hexagonal shapes evenly distributed in the radial direction and eighty hexagonal shapes evenly distributed in the circumferential direction.

[0034] For large flange gaskets, the surface is designed with evenly distributed regular hexagonal patterns with a pattern width of 3.5mm, 3 patterns are designed in the radial direction, and 80 groups or other numbers of patterns are designed evenly distributed in the circumferential direction. The frosted layer on the top surface of the pattern is in contact with the locking mechanism, and the friction strips on another group of linear protrusions are used to increase the force contact points at the same time, greatly improving the friction generated by the diameter of the flange gasket and the locking mechanism to prevent problems such as slipping during installation.

[0035] The structural flange gasket with a frosted layer in the present application has a very high friction force and can provide a large locking force during installation. The static friction coefficient of the flange gasket with linear protrusions, hexagonal protrusions, and frosted layer structures is compared with the existing flange gaskets, as shown in Table 1:

[0036] Table 1:

[0037] Sample 1# Sample 2# Sample 3# Sample 4# Sample structure The existing flange gasket flange surface is flat This application flange gasket hexagonal protrusion This application flange gasket hexagonal convex + frosted layer hydrogenated nitrile rubber This application flange gasket hexagonal protrusion + frosted layer, straight protrusion + friction strip Static friction coefficient 0.85 1.2 1.62 1.75

[0038] Sample 1# is an existing flange gasket, and the surface is a flat positive structure;

[0039] Sample 2# is a structure in which only three groups of hexagonal protrusions are evenly distributed in the circumferential direction on the top surface of the flange gasket, each group of hexagonal protrusions has three hexagonal shapes evenly distributed in the radial direction, and eighty hexagonal shapes are evenly distributed in the circumferential direction;

[0040] Sample 3# is based on sample 2# of this application, and a frosted layer structure is provided on the top surface of the hexagonal protrusion;

[0041] Sample 4# is based on sample 3# of this application, and a friction strip structure is provided on the top surface of the linear protrusion;

[0042] The flange gaskets in the above comparison are all made of EPDM rubber;

[0043] From the perspective of static friction coefficient alone, the flange gasket structure of the present application has improved locking force compared to the existing flange gasket structure.

[0044] The above description is only a preferred embodiment of the present invention and is 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 flange gasket with high friction resistance, characterized in that: The flange gasket is formed by vulcanization around eight flange gasket segments (1); Both sides of the top surface of the flange gasket section (1) are radially provided with linear protrusions (2), and between the linear protrusions (2) on both sides, three groups of hexagonal protrusions (3) are evenly distributed in the circumferential direction of the top surface of the flange gasket section (1); When two adjacent flange gasket sections (1) are butted, the side surfaces of two adjacent linear protrusions (2) are connected and vulcanized into one piece; The top surface of the hexagonal protrusion (3) is provided with a frosted layer (4).

2. The high friction resistance flange gasket according to claim 1, characterized in that: The top surface of the linear protrusion (2) is evenly provided with friction strips (5) having the same angle as the arc edge of the flange gasket section (1).

3. The high friction resistance flange gasket according to claim 2, characterized in that: The top surface of the linear protrusion (2) is provided with an inner concave portion (21), and the inner concave portion (21) and the top surfaces on both sides of the linear protrusion (2) are connected to form a linear contact portion I (22) and a linear contact portion II (23). The friction strip (5) is placed above the inner concave portion (21), and the two ends of the friction strip (5) are respectively connected to the linear contact portion I (22) and the linear contact portion II (23), and the top surface of the friction strip (5) is flush with the linear contact portion I (22) and the linear contact portion II (23).

4. The high friction resistance flange gasket according to claim 3, characterized in that: The top surface of the friction strip (5) is flush with the top surface of the frosted layer (4).

5. The high friction resistance flange gasket according to claim 1, characterized in that: Each group of the hexagonal protrusions (3) has three hexagonal shapes evenly distributed in the radial direction and eighty hexagonal shapes evenly distributed in the circumferential direction.

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