Pipe flange gasket

Abstract

The utility model discloses a pipeline flange sealing gasket, including sealing gasket body, the middle part is provided with through -hole, and the one side of sealing gasket body is provided with extension part, and its peripheral side detachably is provided with elastic sealing ring, and the lateral wall of elastic sealing ring is passed through and is opened the passage, and the passage is suitable for extension part to pass, and the peripheral side of through -hole is provided with the locating ring, and the inside of sealing gasket body is provided with elastic buffer layer, the utility model discloses when two pipeline flanges butt -joint, through elastic sealing ring first with flange face contact and produce elastic deformation, form primary sealing, and the main sealing surface is attached with two flanges, realizes secondary sealing, and double protection can thoroughly solve the problem of oil seepage and water seepage, through elastic buffer layer can absorb the shock impact force, avoid sealing gasket and age cracking because of long -term stress concentration, prolong the service life of sealing gasket, through setting extension part in the peripheral side of sealing gasket, the dismounting and installation of sealing gasket are convenient, very suitable for the working condition of narrow environment, greatly reduced the manual labor intensity.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline sealing devices, and in particular to a pipeline flange sealing gasket. Background Technology

[0002] Gaskets are commonly used sealing parts when connecting pipe flanges. Gaskets are made of metal or non-metal plate material through processes such as cutting, stamping or shearing. Most existing gaskets are made of pure rubber gaskets, asbestos gaskets, etc., which have poor sealing effect and are prone to wear and fall off in vibration environment. They need to be replaced frequently, but replacement is very inconvenient, disassembly and installation take a long time, and increase the labor intensity of operators. Utility Model Content

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a pipe flange sealing gasket to solve the problems mentioned in the background section. To achieve this objective, the present invention adopts the following technical solution: The pipe flange gasket includes a gasket body with a through hole in its middle. An extension is provided on one side of the gasket body. An elastic sealing ring is detachably provided on the periphery of the gasket body. A channel is provided through the side wall of the elastic sealing ring, which is suitable for the extension to pass through. Positioning rings are provided at both ends of the gasket body along the periphery of the through hole. An elastic buffer layer is provided inside the gasket body between the through hole and the elastic sealing ring.

[0004] Optionally, the sealing gasket body has mating grooves at both ends, and the elastic sealing ring is at least partially located in the mating grooves.

[0005] Optionally, the elastic sealing ring has a receiving groove along its inner circumference, and the sealing gasket body is at least partially located within the receiving groove.

[0006] Optionally, the two opposite sidewalls of the receiving groove are respectively provided with docking platforms, and the two docking platforms correspond one-to-one with the two docking grooves and match.

[0007] Optionally, the thickness of the elastic sealing ring is greater than the thickness of the sealing gasket body.

[0008] Optionally, the end of the positioning ring away from the sealing gasket body is provided with a chamfer.

[0009] Optionally, the elastic buffer layer comprises annular spring steel sheets.

[0010] Optionally, the annular spring sheet is a wave spring.

[0011] Optionally, the annular spring sheet is a disc spring.

[0012] Compared to existing technologies, the advantages of this invention are that, when two pipe flanges are joined, the elastic sealing ring first contacts the flange surface and undergoes elastic deformation to form an initial seal. As the bolt tightening pressure increases, the main sealing surface adheres to both flanges, achieving a secondary seal. This dual protection can completely solve the problem of oil and water leakage. The elastic buffer layer can absorb vibration and impact, preventing the gasket from aging and cracking due to long-term stress concentration, thus extending the service life of the gasket. By setting an extension on the periphery of the gasket and opening a channel through the side wall of the elastic sealing ring, the gasket and the elastic sealing ring can be detachably connected, facilitating the disassembly and installation of the gasket. This is very suitable for working conditions in narrow environments, greatly reducing manual labor intensity and improving economy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the elastic sealing ring structure of this utility model; Figure 3 This is a schematic diagram of the sealing gasket body structure of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the elastic sealing ring of this utility model; Figure 5 This is a schematic diagram of the waveform spring structure of this utility model; Explanation of reference numerals in the attached drawings: 1. Sealing gasket body; 2. Through hole; 3. Extension; 4. Elastic sealing ring; 5. Channel; 6. Positioning ring; 7. Wave spring; 11. Mud-joint groove; 41. Receiving groove; 42. Mud-joint platform; 61. Chamfer. Detailed Implementation

[0014] To facilitate understanding of this utility model, the present application will be described in more detail below with reference to the accompanying drawings and specific embodiments; the drawings show preferred embodiments of the present application; however, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification; rather, these embodiments are provided so that the disclosure of the present application will be more thorough and complete.

[0015] It should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In the embodiments shown in the accompanying drawings, directional indications (such as up, down, left, right, front, and back) are used to explain the structure and movement of various components and are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, these directional indications also change accordingly.

[0016] It should also be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; it should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than those illustrated or described herein.

[0017] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0018] like Figure 1-2 As shown, one embodiment of this utility model is: the pipe flange sealing gasket includes a sealing gasket body 1, in which a through hole 2 is provided through the middle, an extension 3 is provided on one side of the sealing gasket body 1, an elastic sealing ring 4 is detachably provided on the periphery of the sealing gasket body 1, a channel 5 is provided through the side wall of the elastic sealing ring 4, the channel 5 is suitable for the extension 3 to pass through, positioning rings 6 are provided at both ends of the sealing gasket body 1 along the periphery of the through hole 2, and an elastic buffer layer is provided inside the sealing gasket body 1 between the through hole 2 and the elastic sealing ring 4.

[0019] When using this pipe flange gasket, the extension 3 passes through the channel 5 of the elastic sealing ring 4, and then the elastic sealing ring 4 and the gasket body 1 are assembled into a whole, with the elastic sealing ring 4 surrounding the periphery of the gasket body 1. The positioning ring 6 is aligned with the pipe position of one of the flanges to be connected, and then the two flanges are aligned and connected with bolts. During connection, the elastic sealing ring 4 first contacts the flange surface and produces elastic deformation, forming an initial seal. As the bolt tightening pressure increases, the main sealing surface fits against the two flanges, achieving a secondary seal. This double protection can completely solve the problem of oil and water leakage. When the gasket is subjected to bolt pressure or equipment vibration, the elastic buffer layer can absorb the impact force, preventing the gasket from aging and cracking due to long-term stress concentration, thus extending the service life of the gasket. During disassembly and installation, the gasket can be removed and placed simply by separating the two flanges by a certain gap and holding the extension 3. It is very suitable for replacement in narrow environments and greatly reduces the intensity of manual labor.

[0020] In one embodiment, such as Figure 3 As shown, the sealing gasket body 1 has mating grooves 11 at both ends, and the elastic sealing ring 4 is at least partially located in the mating grooves 11.

[0021] Specifically, the upper and lower ends of the sealing gasket body 1 are respectively provided with annular mating grooves 11 for mating with the elastic sealing ring 4, so that part of the elastic sealing ring 4 is located in the mating groove 11, thereby increasing the connection reliability and preventing it from falling off.

[0022] In one embodiment, such as Figure 2 , Figure 4 As shown, the elastic sealing ring 4 has a receiving groove 41 along its inner circumference, and the sealing gasket body 1 is at least partially located in the receiving groove 41.

[0023] Specifically, the elastic sealing ring 4 has a receiving groove 41 around its inner wall. The inner opening of the receiving groove 41 is used to receive part of the sealing gasket body 1, ensuring that the sealing gasket body 1 and the elastic sealing ring 4 are in close contact and improving the connection reliability.

[0024] In one embodiment, such as Figure 4 As shown, the two opposite side walls of the receiving groove 41 are respectively provided with docking platforms 42, and the two docking platforms 42 correspond one-to-one with the two docking grooves 11 and match.

[0025] Specifically, the upper and lower side walls of the receiving groove 41 are respectively provided with annular docking platforms 42. The two annular docking platforms 42 and the two annular receiving grooves 41 correspond one-to-one, and the annular docking platforms 42 are embedded in the annular receiving grooves 41, so that the elastic sealing ring 4 and the sealing gasket body 1 become a whole. When one of them is damaged, only the damaged one needs to be replaced, and the other can continue to be used.

[0026] In one embodiment, the thickness of the elastic sealing ring 4 is greater than the thickness of the gasket body 1. Thus, when the two flanges are joined, the elastic sealing ring 4 is located on the periphery of the boss on the contact surface of the two flanges, and the boss presses on the main sealing surface of the gasket body 1 to form a double seal. The part between the channel 5 of the gasket body 1 and the elastic sealing ring 4 is the main sealing surface.

[0027] In one embodiment, the end of the positioning ring 6 away from the sealing gasket body 1 is provided with a chamfer 61. The chamfer 61 facilitates the connection between the positioning ring 6 and the pipe opening in the middle of the flange, which is beneficial for the quick installation of the sealing gasket.

[0028] In one embodiment, the elastic buffer layer includes an annular spring steel sheet, the sealing gasket body 1 is made of rubber, the annular spring steel sheet is disposed inside the main sealing surface of the sealing gasket body 1, the annular spring steel sheet itself has a slight pre-deformation, and the annular spring steel sheet and the rubber of the sealing gasket form an integral force-bearing structure to prevent the steel sheet from shifting during vibration, while ensuring that the elastic force is evenly transmitted to the main sealing surface.

[0029] In one embodiment, such as Figure 5 As shown, the annular spring steel sheet is a wave spring 7. The wave spring 7 has wavy folds in its own axial direction. When the sealing gasket is subjected to bolt pressure, the wave spring 7 will be compressed together with the rubber, and use its own elasticity to generate a reverse thrust to help the rubber maintain the sealing pressure. After the pressure is released, the wave spring 7 rebounds and drives the rubber to return to its original shape, avoiding permanent deformation, increasing its service life, and improving the sealing performance.

[0030] In one embodiment, the annular spring steel sheet is a butterfly spring, which can be composed of two layers of oppositely arranged butterfly spring sheets, and has the same function as the wave spring 7.

[0031] It should be noted that the above-mentioned technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification; and, for those skilled in the art, improvements or modifications can be made based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of this utility model.

Claims

1. A pipe flange sealing gasket, comprising a gasket body, wherein a through hole is provided in the middle, characterized in that, An extension is provided on one side of the sealing gasket body, and an elastic sealing ring is detachably provided on the periphery of the sealing gasket body. A channel is provided through the side wall of the elastic sealing ring, which is suitable for the extension to pass through. Positioning rings are provided at both ends of the sealing gasket body along the periphery of the through hole. An elastic buffer layer is provided inside the sealing gasket body between the through hole and the elastic sealing ring.

2. A pipe flange sealing gasket according to claim 1, characterized in that, The sealing gasket body has mating grooves at both ends, and the elastic sealing ring is at least partially located in the mating grooves.

3. A pipe flange sealing gasket according to claim 2, characterized in that, The elastic sealing ring has a receiving groove along its inner circumference, and the sealing gasket body is at least partially located within the receiving groove.

4. A pipe flange sealing gasket according to claim 3, characterized in that, The two opposite side walls of the receiving groove are respectively provided with docking platforms, and the two docking platforms correspond one-to-one with the two docking grooves and match each other.

5. A pipe flange sealing gasket according to claim 1, characterized in that, The thickness of the elastic sealing ring is greater than the thickness of the sealing gasket body.

6. A pipe flange sealing gasket according to claim 1, characterized in that, The end of the positioning ring away from the sealing gasket body is chamfered.

7. A pipe flange sealing gasket according to claim 1, characterized in that, The elastic buffer layer includes annular spring steel sheets.

8. A pipe flange sealing gasket according to claim 7, characterized in that, The annular spring steel sheet is a wave spring.

9. A pipe flange sealing gasket according to claim 7, characterized in that, The annular spring steel sheet is a butterfly spring.

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