Large-diameter thick-wall flange connecting piece

Abstract

This utility model discloses a large-diameter thick-walled flange connector, which includes flanges fixedly connected to both ends of the flange body, and fixing blocks fixedly connected to the side surfaces of the flanges. The fixing blocks have through holes, and the flanges have through holes. The fixing holes, through holes, and the center of the flange body are aligned on the same straight line. The fixing blocks are symmetrically arranged in pairs, and the number of fixing blocks is the same as the number of fixing holes. The symmetrical arrangement of the fixing blocks and fixing holes significantly improves the accuracy of bolt positioning and installation efficiency during installation. Furthermore, it can form a uniform circumferential stress distribution under stress, effectively avoiding the risk of deformation or breakage of the connector due to localized stress concentration, greatly enhancing the stability and load-bearing capacity of the overall structure. Simultaneously, it ensures precise alignment of the pipeline centerline during connection, reducing media flow resistance, improving sealing, effectively reducing leakage risks, significantly extending equipment service life, and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the technical field of large-diameter thick-walled flange connectors, and in particular to a large-diameter thick-walled flange connector. Background Technology

[0002] In industrial piping systems, flanges are critical components whose performance directly impacts the system's stability and safety. Currently, traditional large-diameter, thick-walled flanges present numerous problems in practical applications. On one hand, unreasonable connection structure design leads to difficulties in bolt positioning and low installation efficiency; on the other hand, stress concentration easily occurs under load, causing deformation or even breakage of the connectors. Furthermore, precise alignment of the pipeline centerline is difficult, resulting in high resistance to media flow, poor sealing, high leakage risk, and increased equipment maintenance costs. Utility Model Content

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a large-diameter thick-walled flange connector, which solves the problem of inconvenient positioning during installation, resulting in low installation efficiency.

[0004] This utility model also provides a large-diameter thick-walled flange connector as described above, comprising: a flange body, flange plates fixedly connected to both end surfaces of the flange body, fixing blocks fixedly connected to the side surfaces of the flange plates, through holes provided on the fixing blocks, and fixing holes provided through the flange plates. The fixing holes, through holes, and the center of the flange body are all on the same straight line, and the fixing blocks are symmetrically arranged in pairs, with the same number as the fixing holes. Through the above structure, the symmetrically arranged fixing blocks and fixing holes not only achieve a standardized and modular connection structure, significantly improving the accuracy of bolt positioning and installation efficiency during installation, but also form a uniform circumferential stress distribution under stress, effectively avoiding the risk of deformation or breakage of the connector due to local stress concentration, and greatly enhancing the stability and load-bearing capacity of the overall structure. At the same time, the design of the fixing holes, through holes, and the center of the flange body being on the same straight line ensures precise alignment of the pipeline centerline during connection, reduces media flow resistance, improves sealing performance, effectively reduces leakage risks, significantly extends equipment service life, and reduces maintenance costs.

[0005] The flange is provided with a first sealing groove, a second sealing groove, and a third sealing groove, the diameters of which decrease sequentially. The fixing hole is located between the first sealing groove and the second sealing groove. Through the above structure, the size of the first sealing groove, the second sealing groove, and the third sealing groove are determined, and the position of the fixing hole is determined.

[0006] The flange body, flange plate, and fixing block are all made of austenitic stainless steel. This structure makes the whole structure resistant to acids and alkalis and resistant to deformation.

[0007] The first sealing groove, the second sealing groove, and the third sealing groove are respectively provided with a first sealing ring, a second sealing ring, and a third sealing ring. The above structure facilitates multi-layer sealing.

[0008] The outer surface of the flange body is provided with a first reinforcing rib. The first reinforcing rib is annular and its axis coincides with the flange body. This structure makes it easier to make the flange body stronger.

[0009] A second reinforcing rib is vertically arranged on the first reinforcing rib, and the second reinforcing rib is distributed in a ring around the axis of the first reinforcing rib. Through the above structure, the distribution and connection of the first reinforcing rib and the second reinforcing rib are determined.

[0010] The connection between the fixing block and the outer surface of the flange is provided with a first circular chamfer. This structure helps to reduce stress.

[0011] A second circular chamfer is provided at the connection between the flange body and the flange plate. This structure helps to reduce stress.

[0012] The beneficial effects of this utility model are:

[0013] This technical solution presents a large-diameter, thick-walled flange connector. Through symmetrically arranged fixing blocks and fixing holes, it not only achieves a standardized and modular connection structure, significantly improving the accuracy of bolt positioning and installation efficiency during installation, but also generates a uniform circumferential stress distribution under stress. This effectively avoids the risk of connector deformation or breakage due to localized stress concentration, greatly enhancing the overall structural stability and load-bearing capacity. Simultaneously, the concentric design of the fixing holes, perforations, and the flange body's centerline ensures precise alignment of the pipeline centerline during connection, reducing media flow resistance, improving sealing, effectively reducing leakage risks, significantly extending equipment service life, and lowering maintenance costs. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of a large-diameter thick-walled flange connector according to this utility model.

[0015] Figure 2 This is a bottom view of the structure of a large-diameter thick-walled flange connector according to this utility model.

[0016] Figure 3 This is a cross-sectional view of a large-diameter, thick-walled flange connector according to this utility model.

[0017] Figure 4This is a diagram of the reinforcing rib connection structure of a large-diameter thick-walled flange connector according to this utility model.

[0018] Legend:

[0019] 1. Flange; 2. Fixing hole; 3. Fixing block; 4. Perforation; 5. First sealing groove; 6. Second sealing groove; 7. Third sealing groove; 8. First sealing ring; 9. Second sealing ring; 10. Third sealing ring; 11. Flange body; 12. First reinforcing rib; 13. Second reinforcing rib; 14. First rounded chamfer; 15. Second rounded chamfer. Detailed Implementation

[0020] Reference Figure 1-4 This utility model discloses a large-diameter thick-walled flange connector, comprising: a flange body 11, with flange plates 1 fixedly connected to both end surfaces of the flange body 11; a second circular chamfer 15 is provided at the connection between the flange body 11 and the flange plates 1; a fixing block 3 is fixedly connected to the side surface of the flange plate 1; a first circular chamfer 14 is provided at the connection between the fixing block 3 and the outer surface of the flange plate 1; a through hole 4 is provided on the fixing block 3; and a fixing hole 2 is provided through the flange plate 1. The fixing hole 2, the through hole 4, and the center of the flange body 11 are on the same straight line, and the fixing blocks 3 are symmetrically arranged in pairs, with the same number as the fixing holes 2. The flange body 11, the flange plate 1, and the fixing blocks 3 are all made of austenitic stainless steel. Material: A first reinforcing rib 12 is provided on the outer surface of the flange body 11. The first reinforcing rib 12 is annular and its axis coincides with the flange body 11. A second reinforcing rib 13 is vertically provided on the first reinforcing rib 12. The second reinforcing rib 13 is distributed in a ring around the axis of the first reinforcing rib 12. A first sealing groove 5, a second sealing groove 6, and a third sealing groove 7 are provided on the flange 1. The diameters of the first sealing groove 5, the second sealing groove 6, and the third sealing groove 7 decrease sequentially. The fixing hole 2 is located between the first sealing groove 5 and the second sealing groove 6. A first sealing ring 8, a second sealing ring 9, and a third sealing ring 10 are respectively provided in the first sealing groove 5, the second sealing groove 6, and the third sealing groove 7.

[0021] Specifically, the flanges 1 of the two flange connectors are aligned, so that the fixing holes 2 correspond one-to-one with the through holes 4. Bolts are then passed through the through holes 4 and fixing holes 2 in sequence and tightened to securely connect the two flange connectors. The fixing blocks 3 are symmetrically distributed in pairs and have the same number as the fixing holes 2, ensuring uniform force distribution during connection and enhancing connection stability. The first sealing ring 8, the second sealing ring 9, and the third sealing ring 10 within the first sealing groove 5, the second sealing groove 6, and the third sealing groove 7 are compressed and deformed when the flanges 1 are tightened, tightly filling the gaps between the flanges 1 to form a multi-layer sealing structure, effectively preventing media leakage. The three-layer sealing design further improves the reliability of the seal. The annular first reinforcing rib 12 on the outside of the flange body 11 and the annularly distributed second reinforcing ribs 13 on it constitute a three-dimensional reinforcing structure. When the flange connector is under pressure, the first reinforcing ribs 12 and the second reinforcing ribs 13 disperse the pressure, improving the pressure resistance of the flange body 11, preventing flange deformation due to excessive pressure, and ensuring the normal use of the flange connector. The first circular chamfer 14 at the connection between the fixing block 3 and the flange 1, and the second circular chamfer 15 at the connection between the flange body 11 and the flange 1, can reduce stress concentration, prevent cracks at the connection under pressure, and improve the service life and safety of the flange connector. At the same time, since the whole is a large-diameter, thick-walled flange connector, its weight is large. During installation and docking, the flange connector can be lifted by perforation before installation. In addition, the setting of multiple fixing blocks 3 makes the whole more stable and less prone to deformation during hoisting.

[0022] Working principle: Align the flanges 1 of the two flange connectors, ensuring the fixing holes 2 and through holes 4 are precisely aligned. Bolts are then passed through through holes 4 and fixing holes 2 in sequence and tightened. Fixing blocks 3 are symmetrically distributed in pairs, with the same number as the fixing holes 2, ensuring even force distribution during connection and achieving a stable connection. Flanges 1 have a first sealing groove 5, a second sealing groove 6, and a third sealing groove 7, on which first sealing rings 8, second sealing rings 9, and third sealing rings 10 are installed, respectively. When flanges 1 are tightly fitted, the sealing rings are compressed and deformed, tightly filling the gaps between flanges 1, forming a multi-layered sealing structure, effectively preventing media leakage and improving sealing reliability. The annular first reinforcing rib 12 on the outer side of the flange body 11 and its annularly distributed second reinforcing ribs 13 constitute a three-dimensional reinforcing structure. When subjected to pressure, these reinforcing ribs can disperse the pressure, enhancing the pressure resistance of the flange body 11 and preventing flange deformation due to excessive pressure. The first circular chamfer 14 at the connection between the fixing block 3 and the flange 1, and the second circular chamfer 15 at the connection between the flange body 11 and the flange 1, can effectively reduce stress concentration, prevent cracks from appearing at the connection under pressure, and improve the service life and safety of the flange connector. Since the connector is heavy, it can be lifted through the through hole 4 on the fixing block 3 during installation. The setting of multiple fixing blocks 3 makes the lifting process more stable, less prone to deformation, and easier to install.

Claims

1. A large-diameter, thick-walled flange connector, characterized in that, The flange includes a flange body (11), and flange plates (1) are fixedly connected to both sides of the flange body (11). Fixing blocks (3) are fixedly connected to the side surfaces of the flange plates (1). The fixing blocks (3) are provided with through holes (4). Fixing holes (2) are provided through the flange plates (1). The center of the fixing holes (2), through holes (4), and flange body (11) are on the same straight line. The fixing blocks (3) are arranged symmetrically in pairs and have the same number as the fixing holes (2).

2. The large-diameter thick-walled flange connector according to claim 1, characterized in that, The flange (1) is provided with a first sealing groove (5), a second sealing groove (6), and a third sealing groove (7), the diameters of the first sealing groove (5), the second sealing groove (6), and the third sealing groove (7) decrease sequentially, and the fixing hole (2) is located between the first sealing groove (5) and the second sealing groove (6).

3. A large-diameter thick-walled flange connector according to claim 1, characterized in that, The flange body (11), flange (1), and fixing block (3) are all made of austenitic stainless steel.

4. A large-diameter thick-walled flange connector according to claim 2, characterized in that, The first sealing groove (5), the second sealing groove (6), and the third sealing groove (7) are respectively provided with a first sealing ring (8), a second sealing ring (9), and a third sealing ring (10).

5. A large-diameter thick-walled flange connector according to claim 1, characterized in that, The outer surface of the flange body (11) is provided with a first reinforcing rib (12), the first reinforcing rib (12) is annular, and the axis of the first reinforcing rib (12) coincides with the flange body (11).

6. A large-diameter thick-walled flange connector according to claim 5, characterized in that, A second reinforcing rib (13) is vertically arranged on the first reinforcing rib (12), and the second reinforcing rib (13) is distributed in a ring around the axis of the first reinforcing rib (12).

7. A large-diameter thick-walled flange connector according to claim 1, characterized in that, The connection between the fixing block (3) and the outer surface of the flange (1) is provided with a first circular chamfer (14).

8. A large-diameter thick-walled flange connector according to claim 1, characterized in that, A second circular chamfer (15) is provided at the connection between the flange body (11) and the flange (1).

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