Sealing structure of flange

Abstract

The invention relates to a flange sealing structure which comprises a left flange and a right flange, a protruding connector is arranged on the left flange, a connecting groove is formed in the right flange, the connector is inserted into the connecting groove to be connected and fixed, a sealing gasket is placed at the connecting position, and corresponding bolt through holes are formed in the two sides of the left flange and the two sides of the right flange. And bolts are inserted into the through holes for screwing, connecting and fixing. The sealing structure has the advantages of simple and reasonable structure, convenience in installation, good sealing performance and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of special gas systems and relates to a flange sealing structure, which is specifically used for large-size high-purity pipeline systems. Background Art

[0002] Flanges were originally used for simple pipe connections to achieve fluid transmission between different devices or pipelines. With the advancement of the industrial revolution, the requirements for the sealing and reliability of pipeline connections have continued to increase, and flange sealing connection technology has also been continuously improved and perfected, resulting in flanges of various types and structures to adapt to different working conditions, such as various pressure levels, temperature ranges, and medium characteristics. The basic principle is to connect two flanges tightly together with bolts, place gaskets between the flanges, and rely on the pre-tightening force of the bolts to make the gaskets produce elastic or plastic deformation to fill the microscopic unevenness between the flange sealing surfaces, thereby preventing fluid leakage.

[0003] However, large-scale high-purity system pipelines and special gas pipelines use automatic welding for valves, equipment, etc. If a flange system is used, the helium inspection cannot pass. In addition, the flange gasket will release impurities during use and pollute the high-purity system.

[0004] Therefore, a flange sealing structure is designed to overcome the above problems. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a flange sealing structure which is simple and reasonable in structure, convenient in installation, practical, safe and reliable.

[0006] The present invention is implemented through the following technical scheme: a flange sealing structure, which includes a left flange and a right flange, the left flange is provided with a protruding connecting head, the right flange is provided with a connecting groove, the connecting head is inserted into the connecting groove for connection and fixation, a sealing gasket is placed at the connection, and corresponding bolt through holes are provided on both sides of the left flange and the right flange, and bolts are inserted into the through holes for screwing and connection and fixation.

[0007] Preferably, a raised sealing convex top is provided at the end of the connector, and a raised connecting convex top is also provided in the connecting groove, so that the two connecting convex tops support the sealing gasket for sealing.

[0008] Preferably, the groove edge protrusion of the connecting groove wraps the connecting head, and an inclined guiding edge is provided on the groove edge to facilitate the protrusion to be accurately inserted into the interior of the groove.

[0009] The beneficial effects of the present invention are as follows: The present invention further optimizes the flange structure, refers to the working principle of VCR, and further enhances its sealing and reliability. Because its gasket is a full metal gasket, such as 316L stainless steel, it also reduces the pollution of the original gasket to the pipeline system, so that the flange structure of the present invention can be used for large-sized high-purity and special gases, and has the characteristics of VCR such as sealing and less pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention. DETAILED DESCRIPTION

[0011] In order to enable those skilled in the art to more clearly understand the objectives, technical solutions and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] In the description of the present invention, it is necessary to understand that the orientation or position relationship indicated by the terms such as "up", "down", "left", "right", "inside", "outside", "horizontal" and "vertical" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or original referred to must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0013] The present invention will be described in detail below with reference to the accompanying drawings: Figure 1 As shown, a flange sealing structure includes a left flange 1 and a right flange 2. The left flange 1 is provided with a protruding connector 3, and the right flange 2 is provided with a connecting groove 4. The connector 3 is inserted into the connecting groove 4 for connection and fixing. A sealing gasket 5 is placed at the connection. Corresponding bolt through holes 6 are provided on both sides of the left flange 1 and the right flange 2. Bolts are inserted into the through holes for screwing and connection and fixing. A protruding sealing convex top is provided at the end of the connector 3, and a protruding connecting convex top is also provided in the connecting groove 4. The two connecting convex tops 7 support the sealing gasket 5 for sealing.

[0014] The flange sealing structure designed in the present invention ensures a firm connection between the left and right flanges by cooperating between the protruding connectors and the connecting grooves provided on the left and right flanges, and the protruding connectors support the sealing gaskets to achieve good sealing.

[0015] The groove edge protrusion of the connecting groove 4 wraps the connecting head 3, and an inclined guiding edge 8 is provided on the groove edge to facilitate the protrusion to be accurately inserted into the inside of the groove.

[0016] The groove edge protrusion of the connecting groove of the present invention wraps the entire connecting head, thereby playing a good sealing role, and cooperates with the internal sealing gasket to achieve a double sealing effect, greatly improving its sealing effect. The inclined guide edge designed by the present invention can easily position the left and right flanges, facilitate assembly, and greatly improve assembly efficiency. The overall structure of the flange is well optimized, thereby ensuring the safety and reliability of the equipment.

[0017] The present invention further optimizes the flange structure, refers to the working principle of VCR, and adds a face sealing form of VCR, thereby further enhancing its sealing and reliability. Because its gasket is a full metal gasket, such as 316L stainless steel, etc., it also reduces the pollution of the original gasket to the pipeline system, so that the flange structure of the present invention can be used for large-sized high-purity and special gases, and has the characteristics of VCR such as sealing and less pollution.

[0018] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A flange sealing structure, comprising a left flange and a right flange, characterized in that: The left flange is provided with a protruding connecting head, and the right flange is provided with a connecting groove, the connecting head is inserted into the connecting groove for connection and fixation, a sealing gasket is placed at the connection, and corresponding bolt through holes are provided on both sides of the left flange and the right flange, and bolts are inserted into the through holes for screwing and connection and fixation.

2. The flange sealing structure according to claim 1, characterized in that: The end of the connector is provided with a raised sealing convex top, and a raised connecting convex top is also provided in the connecting groove, and the two connecting convex tops are used to support the sealing gasket for sealing.

3. The flange sealing structure according to claim 1, characterized in that: The groove edge protrusion of the connecting groove wraps the connecting head, and an inclined guiding edge is provided on the groove edge, so that the protrusion can be accurately inserted into the inside of the groove when being inserted.

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