Flange gasket

Abstract

The utility model belongs to the technical field of mechanical sealing, and particularly relates to a flange gasket. A flow path hole matched with the inner diameter of a pipeline is formed in the center of the gasket body; the protruding parts are arranged on the periphery of the gasket body at equal-angle intervals, and the protruding parts are located between the flange bolt holes and exposed out of the outer end face of the flange; wherein the protruding part comprises a step and a handle, the step extends outwards in the radial direction, the two sides of the step protrude, the handle extends outwards from the outer end face of the step, the step is used for being connected to the outer end face of the flange in a hung mode to prevent the gasket body from falling off, and the handle is used for adjusting and aligning the gasket body and the center of the flange. The protruding part which is simple in structure and convenient to operate is arranged on the periphery of the gasket body, and the protruding part is attached to the outer end face of the flange through the step, so that an operator can conveniently achieve accurate centering.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical seal technical field, especially a flange gasket. BACKGROUND

[0002] As the core sealing component in the flange connection of pipeline, the flange gasket is widely used in the fields of automobile engine cooling system, industrial fluid conveying pipeline, chemical equipment and energy device, etc., and its main function is to form a reliable sealing barrier between the two flange end faces to prevent fluid such as liquid and gas from leaking, and at the same time, to bear the working load such as pressure, temperature and vibration.

[0003] In the prior art, in order to solve the centering problem of the flange gasket, some designs adopt the method of opening positioning holes corresponding to the flange bolt holes on the gasket, and the preliminary alignment of the gasket and the flange is realized by the bolt passing through the positioning holes. However, such design will cause the strength of the gasket body to decrease, and the hole edge is easy to become a stress concentration point, and cracks or damage will occur under high pressure working condition, thereby increasing the risk of leakage. Another common solution is to set a single handle type flange gasket, which is assisted by the handle for positioning, but the single handle structure has the defect of uneven stress, especially in the case of large diameter flange or vertical installation, the gasket is easy to fall off due to the deviation of the center of gravity, and the handle and the gasket body need to be held at the same time during operation, which is low in efficiency. In addition, the traditional flange gasket is mostly of a flat structure, which is completely hidden between the flanges after installation, and it is difficult to confirm the position by visual inspection in the dark or narrow space, and the problem of missing or misloading is difficult to detect, which often leads to leakage accidents in the later operation. The above shows that the existing flange gasket has significant deficiencies in positioning convenience, structural reliability and visual inspection, and an innovative design considering the centering accuracy, strength and operation convenience is urgently needed. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a simple structure and convenient operation by setting the protruding part on the outer periphery of the gasket body, and the protruding part is attached to the outer end face of the flange through the step, so that the operator can conveniently realize accurate centering to alleviate the problems mentioned in the background technology.

[0005] The utility model discloses a flange gasket, which comprises:

[0006] The gasket body is provided with a flow path hole matched with the inner diameter of the pipeline in the center;

[0007] The protruding part is arranged at the outer periphery of the gasket body at equal angles, and the protruding part is located between the flange bolt holes and exposed to the outer end face of the flange;

[0008] The protruding part comprises a step extending outward in the radial direction and protruding on both sides, and a handle extending outward from the outer end face of the step, the step is used for hanging on the outer end face of the flange to prevent the gasket body from falling off, and the handle is used for adjusting and aligning the center of the gasket body and the flange.

[0009] The utility model further sets up, the gasket body is equipped with multiple sealing structure, the multiple sealing structure includes:

[0010] The outer sealing layer is the rib which protrudes on both sides of the gasket body edge;

[0011] The intermediate sealing layer is the annular groove for extending fluid leakage path;

[0012] The inner sealing layer is the annular protrusion with the height higher than the rib.

[0013] The utility model further sets up, the annular groove surface of intermediate sealing layer is equipped with the convex grain, and the convex grain is evenly distributed along the annular groove circumferential direction.

[0014] The utility model further sets up, the gasket body is made of nitrile rubber.

[0015] The utility model further sets up, the surface of protruding part is coated with fluorescent material.

[0016] The utility model further sets up, the number of protruding part is 2 or 4.

[0017] The utility model further sets up, and the protruding part of both sides of the step is the arc shape that is attached with the flange outer end face.

[0018] The utility model further sets up, and the outer surface of handle is equipped with the anti-skid texture.

[0019] Through adopting the above technical scheme, the utility model can obtain the beneficial effects:

[0020] 1. by setting the protruding part containing step and handle at the equal angle on the gasket periphery, utilizes the arc-shaped hanging structure of step and handle anti-skid texture, need not set up bolt positioning hole in gasket body, avoids the intensity drop, and handle can directly adjust the gasket center and flange alignment, cooperates the layout of protruding part between bolt, realizes the non-opening type accurate positioning, improves structural reliability.

[0021] 2. by setting 2 or 4 equal angle distribution protruding parts, replaces traditional single handle structure, and the symmetric design of the protruding part of both sides of step makes the gasket form multiple point balanced support on the flange outer end face, prevents gravity deviation, and the step hangs the flange outer end face during installation, combines the elasticity of rubber body, even in the vertical or large diameter flange scene, can also stable positioning, reduces the risk of falling.

[0022] 3. By coating the protruding part surface with fluorescent material, exposing the tip outside the flange end surface, after installation, the gasket can be quickly confirmed to be correctly in place by visual or ultraviolet light source, avoiding missing or partial loading; the fluorescent coating and protruding part exposure design cooperate to transfer the inspection point from the flange gap to the outside visible area, significantly improving the operation safety in low illumination environment. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 is a schematic diagram of the three-dimensional structure of the utility model placed on the flange;

[0025] Figure 3 is a schematic diagram of the three-dimensional structure of the utility model; Figure 1

[0026] Figure 4 is a schematic diagram of the three-dimensional structure of the utility model; Figure 3

[0027] Figure 5 is a schematic diagram of the three-dimensional structure of the utility model placed between the flanges.

[0028] In the drawing, the reference signs are: 1, gasket body; 2, flow path hole; 3, protruding part; 30, step; 31, handle; 4, flange; 5, flange bolt hole; 6, multiple sealing structure; 60, outer sealing layer; 600, rib; 61, intermediate sealing layer; 610, ring groove; 611, convex grain; 62, inner sealing layer; 620, annular protrusion; 7, anti-skid texture. DETAILED DESCRIPTION

[0029] The utility model will be further described in conjunction with the specific embodiments of the drawings, see Figures 1-5 :

[0030] Example 1:

[0031] The embodiment provides a flange gasket, comprising:

[0032] The gasket body 1 is provided with a flow path hole 2 matched with the inner diameter of the pipeline in the center;

[0033] The protruding part 3 is provided on the outer periphery of the gasket body 1 at equal angle intervals, and the protruding part 3 is located between the bolt holes of the flange 4 and exposed on the outer end surface of the flange 4;

[0034] ​​The protruding part 3 comprises a step 30 extending radially outward and protruding on both sides, and a handle 31 extending outward from the outer end of the step 30, the step 30 is used to hang on the outer end surface of the flange 4 to prevent the gasket body 1 from falling off, and the handle 31 is used to adjust and align the center of the gasket body 1 and the flange 4.

[0035] The gasket body 1 fills the gap between the two flanges 4 in the flange 4 connection, prevents fluid leakage, and withstands certain pressure and temperature. The gasket body 1 is annular as a whole and is matched with the shape of the connecting surface of the flange 4 to ensure good fitting, and the center is provided with a flow path hole 2 matched with the inner diameter of the pipeline to provide a passage for the fluid. The gasket body 1 is fixed between the flanges 4 by the pressing force of the flanges 4 on both sides, and is not directly mechanically connected with the flanges 4.

[0036] The protruding part 3 is used to realize the rapid positioning and installation of the flange gasket, prevent the gasket from falling off, and adjust the center alignment of the gasket and the flange 4. The protruding part 3 is arranged at equal angles on the outer periphery of the gasket body 1 and is exposed on the outer end surface of the flange 4 between the bolt holes of the flange 4. The protruding part 3 comprises a step 30 extending radially outward and protruding on both sides, and a handle 31 extending outward from the outer end of the step 30. The protruding part 3 can be integrally formed with the gasket body 1 to ensure the stability and reliability of the structure.

[0037] The step 30 is used to hang on the outer end surface of the flange 4 to prevent the gasket body 1 from falling off and provide stable support for the gasket, and at the same time, assist the preliminary positioning of the gasket body 1. The step 30 is generally a strip shape extending radially outward, and the protruding parts 3 on both sides are shaped to fit the outer end surface of the flange 4, and the whole is in the shape of "T", which can be integrally formed with the gasket body 1.

[0038] The handle 31 is used as a force point for operation, and the gasket is moved by rotating or translating the handle 31 to adjust and align the center of the gasket body 1 and the flange 4, which is convenient for the operator to install and adjust. The handle 31 is a structure extending outward from the outer end of the step 30, and its shape can be a strip shape or other shapes convenient for the operator to hold. The handle 31 is generally integrally formed with the step 30 to ensure the firmness of the connection.

[0039] During the installation of the flange gasket, the gasket body 1 is first placed between the two flanges 4, and the protruding part 3 is located between the bolt holes of the flange 4. The arc-shaped parts protruding on both sides of the step 30 are hung on the outer end surface of the flange 4, and because they fit closely with the outer end surface of the flange 4, they can stably support the gasket body 1 to prevent it from falling off. The operator holds the handle 31 and rotates or translates the gasket according to the actual situation to realize precise operation and align the center of the gasket body 1 with the center of the flange 4. After installation is completed, the installation state of the gasket can be preliminarily judged by observing whether the protruding part 3 is evenly exposed on the outer end surface of the flange 4.

[0040] Embodiment 2:

[0041] The flange gasket provided in the embodiment further has the following technical features in addition to the technical solutions in the above embodiments.

[0042] The gasket body 1 is provided with a multiple sealing structure 6, which comprises:

[0043] The outer sealing layer 60 is a rib 600 protruding on both sides of the edge of the gasket body 1.

[0044] The intermediate sealing layer 61 is a plurality of ring grooves 610 for extending the fluid leakage path.

[0045] The inner sealing layer 62 is a plurality of annular protrusions 620 with a height higher than the rib 600.

[0046] The multiple sealing structure 6 is used to build a multi-level sealing system for the gasket body 1, to prevent fluid leakage in all directions and improve the sealing performance of the flange gasket. In the flange 4 connection, different sealing layers work together to cope with fluid penetration in different directions and paths, ensuring the sealing and safety of the pipeline system. The multiple sealing structure 6 is composed of the outer sealing layer 60, the intermediate sealing layer 61 and the inner sealing layer 62, which are distributed at different positions of the gasket body 1 to form a gradient sealing structure.

[0047] The outer sealing layer 60 as the first line of defense for sealing blocks the intrusion of external impurities, and at the same time, it preliminarily seals the end face of the flange 4. Specifically, it prevents dust, debris and other impurities from entering the flange 4 connection surface, reduces the impact of impurities on the sealing performance, and at the same time, to some extent, prevents fluid from leaking from the gap of the flange 4 end face. The outer sealing layer 60 is a rib 600 protruding on both sides of the edge of the gasket body 1. The rib 600 is in the shape of a strip and is distributed in a ring shape along the edge of the gasket body 1, and protrudes on both sides to increase the contact area with the end face of the flange 4. The rib 600 is integrally formed with the gasket body 1 to ensure that the rib 600 is firmly connected with the gasket body 1 and will not fall off during use.

[0048] The intermediate sealing layer 61 extends the fluid leakage path and increases the fluid penetration resistance, which is the core part of the multiple sealing structure 6. Specifically, when the fluid breaks through the outer sealing layer 60, the special structure of the intermediate sealing layer 61 can effectively slow down the leakage speed of the fluid and even prevent the fluid from further penetrating. The intermediate sealing layer 61 is a plurality of ring grooves 610 for extending the fluid leakage path. The ring grooves 610 are in the shape of a ring and are located in the area between the edge of the gasket body 1 and the flow path hole 2. The ring grooves 610 are integrally formed with the gasket body 1 to ensure the stability and sealing performance of the structure.

[0049] The inner sealing layer 62 is used to form the last sealing barrier for the fluid, preventing the fluid from leaking from the gap between the inner side of the gasket and the inner wall of the pipe. The inner sealing layer 62 is a plurality of annular protrusions 620 with a height higher than the rib 600, which are circular and distributed around the flow hole 2, close to the center of the gasket body 1, and the height of the protrusions enables them to better contact the inner wall of the pipe. The annular protrusions 620 are integrally formed with the gasket body 1, ensuring the connection strength and sealing between the annular protrusions 620 and the gasket body 1.

[0050] When the flanges 4 are connected, the gasket body 1 is installed between the two flanges 4, and the multiple sealing structure 6 begins to work. The rib 600 of the outer sealing layer 60 first tightly fits the end face of the flange 4, fills the small uneven places on the end face of the flange 4 using the elasticity of the rubber, forms the first sealing barrier, prevents external impurities from entering, and has a certain blocking effect on the fluid. When the fluid tries to leak, it will enter the annular groove 610 of the middle sealing layer 61 if it breaks through the outer sealing layer 60. The special structure of the annular groove 610 makes the fluid need to detour along the path of the annular groove 610, greatly increasing the length of the leakage path and delaying the leakage speed of the fluid. Even if the fluid passes through the middle sealing layer 61, the annular protrusions 620 of the inner sealing layer 62 will tightly fit the inner wall of the pipe, fill the gap using the elastic deformation of the rubber, form the last line of defense, prevent the fluid from leaking from the inner side of the gasket, and thus achieve all-round sealing of the fluid.

[0051] Embodiment 3:

[0052] The present embodiment provides a flange gasket, which, in addition to the technical solutions of the above-mentioned embodiments, has the following technical features.

[0053] The surface of the annular groove 610 of the middle sealing layer 61 is provided with a relief 611, and the relief 611 is uniformly distributed in the circumferential direction of the annular groove 610.

[0054] The embodiment sets protrusions 611 uniformly distributed in the circumferential direction on the surface of the annular groove 610 of the intermediate sealing layer 61, aiming to strengthen the sealing performance of the flange gasket. When the fluid attempts to pass through the intermediate sealing layer 61, the annular groove 610 itself has already lengthened its leakage path, and the presence of the protrusions 611 further increases the complexity of fluid flow. From a microscopic perspective, the protrusions 611 make the surface of the annular groove 610 rough, and when the fluid contacts the protrusions 611, more turbulence and vortexes are generated, which greatly consumes the energy of the fluid, making it difficult for the fluid to flow smoothly through the annular groove 610. The advantage of this design is significant, as it effectively improves the blocking ability of the sealing structure to the fluid and enhances the sealing effect, better preventing fluid leakage even under high-pressure and high-flow working conditions, ensuring the safe and stable operation of the pipeline system. At the same time, the uniform distribution of the protrusions 611 ensures the consistency of the sealing performance in the circumferential direction, avoiding the risk of leakage due to local weak sealing.

[0055] Embodiment 4:

[0056] The embodiment provides a flange gasket, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0057] The gasket body 1 is made of nitrile rubber.

[0058] The gasket body is made of nitrile rubber, which is mainly to meet the stringent requirements for sealing performance and durability under complex working conditions in the automotive field. During the operation of the automobile, the engine, gearbox and other key components will generate high temperature, and oil media such as lubricating oil and fuel will frequently contact the flange connection part. Ordinary materials are prone to swelling, aging or failure. Nitrile rubber has excellent oil resistance and can maintain stable physical properties when in contact with various fuels and lubricating oils for a long time, avoiding deformation and leakage caused by oil erosion. Its good heat resistance ensures continuous use in a high-temperature environment of 120℃, adapting to the high-temperature working conditions in the engine compartment of the automobile. In addition, nitrile rubber also has good wear resistance and tear resistance, and can withstand the vibration and mechanical stress during the operation of the automobile. The advantage of this design is that it greatly improves the service life and sealing reliability of the flange gasket in the complex environment of the automobile, effectively reduces the failure caused by the failure of the gasket, such as oil leakage and air leakage, and reduces the maintenance frequency and maintenance cost, providing reliable protection for the safe and stable operation of the automobile.

[0059] Embodiment 5:

[0060] The embodiment provides a flange gasket, which comprises the technical solutions of the above-mentioned embodiments and has the following technical features.

[0061] The surface of the protrusion 3 is coated with a fluorescent material.

[0062] The surface of the protruding part 3 is coated with fluorescent material, the core purpose of which is to solve the problem that the installation state of the gasket is not easy to observe, and to improve the convenience and accuracy of installation and maintenance. Since the gasket is often installed in a closed and dimly lit space environment, it is difficult to confirm whether it is correctly installed and positioned through conventional means. However, the fluorescent material can emit high-brightness visible light under ultraviolet light or weak light, making the protruding part 3 clearly visible even in low-illumination and narrow installation space. The advantage of this design is that the operator can quickly and intuitively determine whether the gasket is installed in place, avoiding the risk of sealing failure due to missing or misplacement. At the same time, during the inspection process during equipment operation, the gasket state can also be easily checked through the fluorescent feature, significantly improving installation efficiency and timeliness of equipment maintenance, and reducing potential safety hazards and maintenance costs caused by installation problems.

[0063] Embodiment 6:

[0064] The flange gasket provided in the embodiment comprises the technical solutions of the above-mentioned embodiments, and has the following technical features.

[0065] The number of protruding parts 3 is 2 or 4.

[0066] The number of protruding parts 3 is set to 2 or 4, the main purpose of which is to provide a flexible and efficient installation and positioning solution according to different flange 4 specifications and use scenarios. Two protruding parts 3 are suitable for small-diameter flanges 4 with limited space, and can quickly achieve preliminary positioning and center calibration of the gasket through 180° symmetrical distribution, allowing single-person convenient operation and effectively improving installation efficiency. Four protruding parts 3 are more suitable for large-diameter flanges 4, and are distributed at equal angles of 90°, providing more balanced support during installation to prevent the gasket from shifting or falling due to uneven force, ensuring the stability and accuracy of installation. This number-selectable design not only meets the needs of flanges 4 of different sizes, but also avoids the limitations of single structures in applicability, reducing research and production costs for enterprises to adapt to various flange 4 specifications, while significantly improving the installation success rate and use reliability of the flange gasket under various working conditions.

[0067] Embodiment 7:

[0068] The flange gasket provided in the embodiment comprises the technical solutions of the above-mentioned embodiments, and has the following technical features.

[0069] The two protruding parts 3 on both sides of the step 30 are arc-shaped and fit the outer end face of the flange 4.

[0070] The two side protrusions 3 of the step 30 are designed as an arc shape that fits the outer end surface of the flange 4, and the core purpose is to enhance the stability and fit degree during the installation of the flange gasket. The traditional flat or right-angle structure of the step 30 is prone to uneven local stress and loose fit when hanging the outer end surface of the flange 4, which causes the gasket to shake or even fall off during installation. The arc-shaped design can closely fit the contour of the outer end surface of the flange 4, forming a surface contact between the step 30 and the flange 4, which greatly increases the contact area compared to point or line contact, effectively dispersing the pressure during installation and reducing stress concentration. The advantages of this design are as follows: first, it significantly improves the stability of the gasket during installation, and even in a vertical installation or vibrating environment, the mechanical hanging effect of the arc-shaped structure can prevent the gasket from falling off; second, the arc-shaped fit can better adapt to the outer end surface of the flange 4 with different machining precision, reducing the requirement for the flatness of the flange 4 surface and enhancing the universality of the product; third, the stable hanging structure provides reliable support for subsequent adjustment of the gasket position by the handle 31, ensuring that the gasket can be accurately aligned with the center of the flange 4, thereby improving the overall sealing performance and reducing the risk of leakage caused by improper installation.

[0071] Embodiment 8:

[0072] The flange gasket provided in this embodiment, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] The outer surface of the handle 31 is provided with anti-slip texture 7.

[0074] The anti-slip texture 7 is provided on the outer surface of the handle 31, and the core purpose is to optimize the operation experience of the operator on the flange gasket, and to improve the accuracy and safety of the installation process. During the installation and adjustment of the flange gasket, if the surface of the handle 31 is smooth, the operator's hands are prone to slipping when holding or rotating, which can cause the gasket to be misaligned, or even cause the gasket to fall off or be damaged due to the hands slipping. The anti-slip texture 7 effectively increases the friction between the handle 31 and the hands by increasing the roughness of the handle 31, so that the operator can more stably exert force and control the handle 31. The advantages are as follows: first, the operation accuracy is significantly improved, ensuring that the gasket can be quickly and accurately aligned with the center of the flange 4, avoiding repeated adjustments due to slipping, and improving the installation efficiency; second, the operation safety is enhanced, even in the case of wet hands, oil stains or wearing gloves, the anti-slip texture 7 can still provide reliable grip, preventing safety hazards caused by hands slipping; third, the fatigue of the operator is reduced, and the stable gripping experience reduces the fatigue of the hands due to continuous force to prevent slipping, especially suitable for long-term or repetitive installation work, ultimately ensuring efficient, stable and safe installation of the flange gasket.

[0075] The above embodiment is only a preferred embodiment of the utility model, and does not limit the protection scope of the utility model, so that: all equivalent changes made according to the structure, shape, principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A flange gasket, characterized in that , comprising: a gasket body (1) with a flow path hole (2) in the center matching the inner diameter of the pipe; a protruding part (3) arranged at equal angles on the outer periphery of the gasket body (1), said protruding part (3) is located between the bolt holes of the flange (4) and exposed on the outer end surface of the flange (4); wherein said protruding part (3) contains a step (30) extending radially outward and protruding on both sides, and a handle (31) extending outward from the outer end surface of said step (30), said step (30) is used to hang on the outer end surface of the flange (4) to prevent the gasket body (1) from falling off, and said handle (31) is used to adjust and align the center of the gasket body (1) and the flange (4).

2. A flange gasket according to claim 1, wherein A plurality of sealing structures (6) are arranged on the gasket body (1), said sealing structures (6) include: an outer sealing layer (60) which is a rib (600) protruding on both sides of the edge of the gasket body (1); an intermediate sealing layer (61) which is a plurality of ring grooves (610) for extending the fluid leakage path; an inner sealing layer (62) which is a plurality of annular protrusions (620) with a higher protrusion height than said rib (600).

3. A flange gasket according to claim 2, wherein The surface of the ring groove (610) of the intermediate sealing layer (61) is provided with a convex pattern (611), said convex pattern (611) is uniformly distributed along the circumferential direction of the ring groove (610).

4. The flange gasket of claim 1 wherein, The gasket body (1) is made of nitrile rubber.

5. The flange gasket of claim 1 wherein, The surface of said protruding part (3) is coated with a fluorescent material.

6. A flange gasket according to claim 1 wherein, The number of said protruding part (3) is 2 or 4.

7. A flange gasket according to claim 1 wherein, The protruding part (3) on both sides of said step (30) is arc-shaped and fits the outer end surface of the flange (4).

8. The flange gasket of claim 1 wherein, The outer surface of said handle (31) is provided with anti-slip texture (7).

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