Corrosion-resistant PTFE flange gasket

Abstract

The utility model relates to the technical field of flange washers, in particular to a corrosion-resistant PTFE flange washer which comprises a rubber washer, the rubber washer is of a middle hollow structure, a PTFE coating layer is fixedly connected to the inner wall of the rubber washer, and two arc-shaped protrusions are arranged at the two ends of the PTFE coating layer respectively. According to the corrosion-resistant PTFE flange gasket, the PTFE coating layer is arranged, the inner ring in the rubber gasket is coated with the PTFE coating layer, the part, making contact with a medium, of the rubber gasket is the PTFE coating layer, the PTFE coating layer is made of PTFE materials, and therefore the gasket can be prevented from being corroded, the corrosion resistance is improved, the rubber gasket is filled with rubber, and the corrosion resistance is improved. The whole gasket has certain elasticity, the sealing reliability is improved, and therefore the corrosion resistance and the sealing performance are met at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of flange gaskets, in particular to a corrosion-resistant PTFE flange gasket. Background Art

[0002] Flange gaskets are very important accessories in flange connections. In pipeline connections, flanges are a very widely used connection method, and sealing rings are essential seals in flange connections. The performance of the seal directly affects the service life of the flange, especially in corrosive fluid transportation pipelines. It is necessary to ensure that the sealing material can withstand the corrosion of the medium and has reliable sealing performance. Traditional flange gaskets are mostly made of a single material, such as rubber, PTFE plastic, etc., with relatively single performance, and cannot meet both corrosion resistance and good sealing performance. Therefore, we have launched a corrosion-resistant PTFE flange gasket. Utility Model Content

[0003] The main purpose of the utility model is to provide a corrosion-resistant PTFE flange gasket, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A corrosion-resistant PTFE flange gasket comprises a rubber gasket, wherein the rubber gasket is a hollow structure in the middle, a PTFE coating layer is fixedly connected to the inner wall of the rubber gasket, and two arc-shaped protrusions are arranged at both ends of the PTFE coating layer.

[0006] Preferably, a pull tab is fixedly connected to the upper portion of the outer surface of the rubber gasket, a hole is opened in the pull tab, and four through holes are opened on the right end of the rubber gasket to penetrate left and right.

[0007] Preferably, a No. 2 flange is provided on the left portion of the rubber gasket, and a No. 1 flange is provided on the right portion of the rubber gasket, and the No. 2 flange and the No. 1 flange are commonly connected by four connecting bolts.

[0008] Preferably, the four connecting bolts are respectively inserted into the four through holes.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] By providing a PTFE coating layer, and the PTFE coating layer wraps the inner ring of the rubber gasket, since the part of the rubber gasket that contacts the medium is the PTFE coating layer, and the PTFE coating layer is made of PTFE material, the gasket can be prevented from being corroded and the corrosion resistance can be improved. Since the rubber gasket is filled with rubber, the gasket as a whole has a certain elasticity, which improves the reliability of the seal, thereby satisfying both the corrosion resistance and the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the installation of a corrosion-resistant PTFE flange gasket of the utility model;

[0012] Figure 2 This is a schematic diagram of the overall structure of a corrosion-resistant PTFE flange gasket of the utility model;

[0013] Figure 3 It is a right side view of a corrosion-resistant PTFE flange gasket of the utility model.

[0014] In the figure: 1. rubber gasket; 2. PTFE coating layer; 3. arc-shaped protrusion; 4. pull tab; 5. through hole; 6. connecting bolt; 7. No. 1 flange; 8. No. 2 flange. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0016] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See also Figure 1-3 , the utility model provides a technical solution:

[0019] A corrosion-resistant PTFE flange gasket comprises a rubber gasket 1, the rubber gasket 1 is a hollow structure in the middle, a PTFE coating layer 2 is fixedly connected to the inner wall of the rubber gasket 1, and two arc-shaped protrusions 3 are arranged at both ends of the PTFE coating layer 2;

[0020] The PTFE coating layer 2 wraps the inner ring of the rubber gasket 1. When the medium flows, the PTFE coating layer 2 contacts the medium, so that the PTFE coating layer 2 protects the rubber gasket 1, thereby achieving a corrosion-resistant effect.

[0021] In this embodiment, a pull tab 4 is fixedly connected to the upper portion of the outer surface of the rubber gasket 1, a hole is opened in the pull tab 4, and four through holes 5 are opened on the right end of the rubber gasket 1 to pass through the left and right sides; a No. 2 flange 8 is provided on the left portion of the rubber gasket 1, and a No. 1 flange 7 is provided on the right portion of the rubber gasket 1, and the No. 2 flange 8 and the No. 1 flange 7 are jointly connected by four connecting bolts 6; the four connecting bolts 6 are respectively inserted into the four through holes 5.

[0022] It should be noted that the utility model is a corrosion-resistant PTFE flange gasket. During use, the rubber gasket 1 is placed between the No. 2 flange 8 and the No. 1 flange 7, four connecting bolts 6 pass through the No. 2 flange 8 and the No. 1 flange 7, and the four connecting bolts 6 pass through the four through holes 5 respectively, and then nuts are used in conjunction with the connecting bolts 6 to connect and fix the rubber gasket 1, the No. 2 flange 8 and the No. 1 flange 7. After the installation is completed, since the part of the rubber gasket 1 that contacts the medium is the PTFE coating layer 2, and the PTFE coating layer 2 is PTFE material, the gasket can be prevented from being corroded and the corrosion resistance is improved. Since the rubber gasket 1 is filled with rubber, the gasket as a whole has a certain elasticity, which improves the reliability of the seal, thereby satisfying both the corrosion resistance and the sealing performance.

[0023] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A corrosion-resistant PTFE flange gasket, comprising a rubber gasket (1), characterized in that: The rubber gasket (1) is a hollow structure in the middle, and a PTFE coating layer (2) is fixedly connected to the inner wall of the rubber gasket (1), and two arc-shaped protrusions (3) are arranged at both ends of the PTFE coating layer (2); A pull tab (4) is fixedly connected to the upper portion of the outer surface of the rubber gasket (1), a hole is formed in the pull tab (4), and four through holes (5) are formed on the right end of the rubber gasket (1) and extend through the rubber gasket (1) to the left and right.

2. The corrosion-resistant PTFE flange gasket according to claim 1, characterized in that: A No. 2 flange (8) is arranged on the left side of the rubber gasket (1), and a No. 1 flange (7) is arranged on the right side of the rubber gasket (1). The No. 2 flange (8) and the No. 1 flange (7) are connected together by four connecting bolts (6).

3. A corrosion-resistant PTFE flange gasket according to claim 2, characterized in that: The four connecting bolts (6) are respectively inserted into the four through holes (5).

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