Novel hubbed flat welding flange

Abstract

The utility model relates to the technical field of machinery, in particular to a novel hubbed flat welding flange which comprises a first flange and a second flange, each of the first flange and the second flange comprises a flange body and a neck table, and through holes are formed in the center positions of the first flange and the second flange. A plurality of mutually corresponding mounting holes are annularly formed in the two flange bodies, a sealing ring is arranged on the connecting surface of the first flange, a sealing groove is formed in the connecting surface of the second flange, and the sealing groove is matched with the sealing ring; a plurality of positioning blocks are annularly arranged on the connecting face of the second flange, a plurality of positioning grooves matched with the positioning blocks are annularly formed in the connecting face of the first flange, and permanent magnets are arranged in the positioning grooves respectively. Through unique structural design and material selection, the sealing performance and corrosion resistance of the flange can be enhanced, it is guaranteed that the two flanges are accurately aligned when pipelines are connected, and the stability of connection between the two flanges is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a novel flat welding flange with a neck. Background Art

[0002] Neck slip-on flange is a flange that connects steel pipes, pipe fittings, etc. to equipment or pipelines through fillet welds. Compared with plate slip-on flanges, neck slip-on flanges can provide higher strength and load-bearing capacity due to their unique short neck design, and are suitable for higher pressure pipeline systems.

[0003] When two pipe flanges with larger diameters are connected, they are mostly connected directly by bolts. It is difficult to align the two flanges accurately, which easily leads to inaccurate alignment of the two flanges. In addition, the high-pressure medium accelerates the aging and damage of the sealing ring in the flange, causing it to lose its sealing function. Since the traditional necked flat welding flange has deficiencies in connection strength, sealing and installation efficiency, we provide a new necked flat welding flange to solve the above problems. Utility Model Content

[0004] In view of this, the utility model aims at the deficiencies of the prior art and proposes a new type of necked flat welding flange. Through unique structural design and material selection, it ensures accurate alignment between the two flanges when connecting pipelines, improves the stability of the connection between the two flanges, and also enhances the sealing and corrosion resistance of the flange.

[0005] The utility model provides a novel flat-weld flange with a neck, comprising a first flange and a second flange, wherein the first flange and the second flange both comprise an integrally arranged flange body and a neck platform, through holes are provided at the center positions of the first flange and the second flange, and a plurality of mutually corresponding mounting holes are annularly arranged on the two flange bodies, a sealing ring is provided on the connecting surface of the first flange, and a sealing groove is provided on the connecting surface of the second flange, and the sealing groove is matched with the sealing ring; a plurality of positioning blocks are annularly arranged on the connecting surface of the second flange, and a plurality of positioning grooves matched with the positioning blocks are annularly arranged on the connecting surface of the first flange, and permanent magnets are respectively arranged in the positioning grooves.

[0006] In some embodiments of the present application, four positioning blocks and four positioning grooves are provided, and both the positioning blocks and the positioning grooves are arc-shaped.

[0007] In some embodiments of the present application, a plurality of reinforcing plates are disposed between the flange body and the neck platform, and the plurality of reinforcing plates are evenly arranged along the circumferential direction of the neck platform and the flange body.

[0008] In some embodiments of the present application, the sealing ring is a conical structure with a gradually decreasing cross-section, and the sealing groove is a conical structure that cooperates with the sealing ring.

[0009] In some embodiments of the present application, the sealing ring is a memory alloy sealing ring, and the sealing groove is provided with a sealing ring.

[0010] In some embodiments of the present application, the sealing ring is a graphite metal wound gasket.

[0011] In some embodiments of the present application, the neck and the flange body are made of nickel-based alloy.

[0012] In some embodiments of the present application, the surfaces of the neck platform and the flange body are coated with an anti-rust coating, and the surface of the anti-rust coating is coated with a zirconium oxide coating.

[0013] In some embodiments of the present application, the first flange and the second flange are connected by a bolt assembly, and the bolt assembly includes a bolt, a gasket and a nut. The bolt is passed through the gasket and the mounting hole, and the nut is connected to the free end of the bolt.

[0014] The utility model discloses a new type of flat-welded flange with a neck. Positioning blocks and positioning grooves matching the positioning blocks are respectively provided on the connection surfaces of the two flanges, and permanent magnets are provided in the positioning grooves. Automatic alignment is achieved by magnetic force, which greatly simplifies the flange docking process and improves the installation accuracy and speed of the bolt assembly. A conical sealing ring and a sealing groove precisely matching the sealing ring are provided on the flange connection surface to form a tight sealing interface to ensure the sealing of the flange connection. The sealing ring is made of memory alloy material and has good elastic recovery force and temperature resistance to ensure the sealing reliability under long-term use. The graphite metal wound gasket embedded in the sealing groove can further enhance the sealing effect and adapt to changes in temperature and pressure. A reinforcing plate is provided between the flange body and the neck platform to increase the rigidity and pressure-bearing capacity of the overall structure of the flange, which can effectively prevent the flange from deformation, especially in high temperature and high pressure environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A bottom view of a first flange and a second flange of a novel flat-weld neck flange provided in an embodiment of the utility model;

[0016] Figure 2 A top view of a first flange structure of a new type of flat-weld neck flange provided in an embodiment of the utility model;

[0017] Figure 3 One of the side cross-sectional views of the first flange and the second flange provided in the embodiment of the utility model;

[0018] Figure 4 Another side cross-sectional view of the first flange and the second flange provided in an embodiment of the utility model.

[0019] Among them: 1. neck platform; 2. flange body; 3. mounting hole; 4. through hole; 5. reinforcing plate; 11. bolt; 12. gasket; 13. nut; 100. first flange; 110. sealing ring; 120. positioning groove; 121. permanent magnet; 200. second flange; 210. sealing groove; 211. sealing ring; 220. positioning block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 indirectly connected 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 this application can be understood according to specific circumstances.

[0024] The utility model provides a new type of flat welding flange with neck, such as Figure 1As shown, it includes a first flange 100 and a second flange 200, each flange body includes a flange body 2 and a neck 1, and the center of the flange body 2 and the neck 1 is provided with a through hole 4, and the through hole 4 is used for medium circulation; a plurality of mounting holes 3 are evenly distributed around each flange body 2, so as to facilitate the fixing of the two flanges by a bolt assembly. Among them, a sealing ring 110 is provided on the connection surface of the first flange 100, and a sealing groove 210 is provided on the connection surface of the second flange 200, and the sealing groove 210 is adapted to the sealing ring 110; a plurality of positioning blocks 220 are provided in an annular manner on the connection surface of the second flange 200, and a plurality of positioning grooves 120 are provided in an annular manner on the connection surface of the first flange 100, and the positioning blocks 220 are adapted to the positioning grooves 120.

[0025] Specifically, Figure 3 As shown, the sealing ring 110 provided on the connection surface of the first flange 100 is a tapered structure with a gradually decreasing cross section, and the sealing groove 210 on the second flange 200 is also a tapered structure, which precisely matches the sealing ring 110 to form a tight sealing interface. The sealing ring 110 is made of memory alloy material, which has good elastic recovery and temperature resistance, ensuring the sealing reliability under long-term use. Figure 3 The first flange 100 , the second flange 200 , and a side cross-sectional view of the connection between the first flange 100 and the second flange 200 are shown.

[0026] In some embodiments of the present application, a sealing ring 211 is embedded in the sealing groove 210. The sealing ring 211 adopts a graphite metal wound gasket 12, which can further enhance the sealing effect and adapt to changes in temperature and pressure.

[0027] In some embodiments of the present application, Figure 1 and Figure 4 As shown, the positioning blocks 220 arranged in an annular manner on the connection surface of the second flange 200 are arc-shaped positioning blocks, and four of them are provided. The positioning grooves 120 provided on the connection surface of the first flange 100 are arc-shaped positioning grooves, and four of them are also provided, which match the positioning blocks 220. Figure 4 The first flange 100 , the second flange 200 , and another side cross-sectional view of the connection between the first flange 100 and the second flange 200 are shown.

[0028] In some embodiments of the present application, a permanent magnet 121 is respectively provided in each positioning groove 120, and the positioning block 220 is inserted into the positioning groove 120, and is automatically aligned by magnetic force, and plays a certain fixing role, which can simplify the flange docking process, improve the installation accuracy and speed, effectively avoid the misalignment problem during traditional flange assembly, and ensure the stability of the connection between the two flanges.

[0029] In some embodiments of the present application, Figure 2As shown, multiple reinforcing plates 5 are evenly arranged between the flange body 2 and the neck platform 1. The multiple reinforcing plates 5 are evenly arranged along the circumferential direction of the neck platform 1 and the flange body 2, which increases the rigidity and pressure-bearing capacity of the overall structure of the flange, especially in high temperature and high pressure environments, and can effectively prevent flange deformation.

[0030] In some embodiments of the present application, Figure 3 As shown, the first flange 100 and the second flange 200 are connected by a high-performance bolt 11 assembly, which includes a bolt 11, a gasket 12 and a nut 13. The bolt 11 passes through the mounting hole 3 and the gasket 12, and then the free end is fastened with a nut 13, thereby ensuring a reliable connection between the two flanges.

[0031] In some embodiments of the present application, the flange body 2 and the neck platform 1 are made of nickel-based alloy, which has excellent corrosion resistance and high temperature performance. In addition, an anti-rust coating is applied on the surface of the flange body 2 and the neck platform 1, and a layer of zirconium oxide coating is applied on the surface of the anti-rust coating, which not only improves the corrosion resistance of the flange, but also increases the surface hardness and prolongs the service life.

[0032] In summary, the embodiment provides a new type of flat-welded flange with a neck, the neck platform 1 of the first flange 100 and the second flange 200 are respectively fixedly connected to the two sections of the pipeline, the flange bodies 2 of the two flanges have opposite connection surfaces, the positioning block 220 is inserted into the positioning groove 120, the permanent magnet 121 in the positioning groove 120 magnetically attracts the positioning block 220, the two flanges are pre-positioned, and then the bolt 11 is sleeved with the gasket 12, passed through the mounting hole 3, and then fixed with the nut 13. When the first flange 100 and the second flange 200 are connected by the bolt 11, the sealing ring 110 contacts the sealing groove 210 and squeezes the sealing ring 211, thereby ensuring the sealing effect of the flange. The flange of the utility model realizes efficient sealing and simple installation of the flange under harsh working conditions through an innovative sealing structure and positioning design, and can be widely used in industries such as petroleum, chemical industry, and energy, providing a strong guarantee for the safe and stable operation of pipelines.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A new type of flat welding flange with neck, characterized in that: The invention comprises a first flange (100) and a second flange (200), wherein the first flange (100) and the second flange (200) both comprise an integrally arranged flange body (2) and a neck platform (1), a through hole (4) is provided at the center of the first flange (100) and the second flange (200), and a plurality of mutually corresponding mounting holes (3) are provided in an annular manner on the two flange bodies (2), a sealing ring (110) is provided on the connecting surface of the first flange (100), and a sealing groove (210) is provided on the connecting surface of the second flange (200), and the sealing groove (210) is matched with the sealing ring (110); a plurality of positioning blocks (220) are provided in an annular manner on the connecting surface of the second flange (200), and a plurality of positioning grooves (120) matched with the positioning blocks (220) are provided in an annular manner on the connecting surface of the first flange (100), and permanent magnets (121) are respectively provided in the positioning grooves (120).

2. The novel flat-weld flange with neck according to claim 1 is characterized in that: Four of the positioning blocks (220) and four of the positioning grooves (120) are provided, and both the positioning blocks (220) and the positioning grooves (120) are arc-shaped.

3. The novel flat-weld flange with neck according to claim 1 is characterized in that: A plurality of reinforcing plates (5) are arranged between the flange body (2) and the neck platform (1), and the plurality of reinforcing plates (5) are evenly arranged along the circumferential direction of the neck platform (1) and the flange body (2).

4. The novel flat-weld flange with neck according to claim 1 is characterized in that: The sealing ring (110) is a conical structure with a gradually decreasing cross section, and the sealing groove (210) is a conical structure that matches the sealing ring (110).

5. The novel flat-weld flange with neck according to claim 4 is characterized in that: The sealing ring (110) is a memory alloy sealing ring, and the sealing groove (210) is provided with a sealing ring (211).

6. The novel flat-weld flange with neck according to claim 5 is characterized in that: The sealing ring (211) is a graphite metal wound gasket.

7. The novel flat-weld flange with neck according to claim 1 is characterized in that: The material of the neck platform (1), the flange body (2) and the positioning block (220) is nickel-based alloy.

8. The novel flat-weld flange with neck according to claim 7 is characterized in that: The surfaces of the neck platform (1), the flange body (2) and the positioning block (220) are respectively coated with an anti-rust coating, and the surface of the anti-rust coating is coated with a zirconium oxide coating.

9. The novel flat-weld flange with neck according to claim 1 is characterized in that: The first flange (100) and the second flange (200) are connected by a bolt assembly, wherein the bolt assembly comprises a bolt (11), a gasket (12) and a nut (13), wherein the bolt (11) passes through the gasket (12) and the mounting hole (3), and the nut (13) is connected to the free end of the bolt (11).

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