Novel welding neck flange

Abstract

The utility model relates to the technical field of flanges, and discloses a novel hubbed welding neck flange which comprises a flange plate and a neck pipe, the flange plate and the neck pipe are of an integrated structure, flow guide holes are formed in the middle of the flange plate and the middle of the neck pipe, a connecting arc angle is arranged at the connecting position of the flange and the neck pipe, and the flange plate is connected with the neck pipe. The arc radius of the connecting arc angle is less than or equal to 8mm; a first slope and a second slope are arranged on the outer side wall of the neck tube, and the gradient difference value of the first slope and the second slope is larger than 10% and smaller than or equal to 50%. Through the integrated structure of the flange plate and the neck pipe and the design of the connecting arc angle, stress concentration is effectively reduced, and the overall structural strength and durability of the flange are enhanced. And the first slope surface and the second slope surface are arranged on the outer side wall of the neck tube, so that the design of a welding groove is optimized, the welding quality and reliability are effectively improved, and the strength and the sealing performance of a welding seam are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a novel necked butt-welding flange. Background Art

[0002] As an important component of pipeline connection, the neck flange is designed with the neck structure to provide more excellent structural strength and stress distribution performance. It is mainly used in high-pressure, high-temperature or frequently disassembled pipeline systems to ensure the tightness and stability of the connection, significantly reduce the risk of leakage, and improve the convenience of installation and maintenance.

[0003] However, the neck flanges currently on the market generally have a serious problem of stress concentration, which not only weakens the overall strength of the flange, but also shortens its service life, thereby increasing the risk of flange damage and leakage. In addition, due to the difference in neck specifications, the welding difficulty of operators during installation is increased, and the strength of the weld after welding is often low, further affecting the mechanical properties of the flange.

[0004] Therefore, it is urgent to invent a new type of neck-welded flange to solve the problem that the stress concentration in the traditional neck-welded flange is serious, resulting in low flange strength, and the welding difficulty and low weld strength caused by the difference in neck specifications. Utility Model Content

[0005] In view of this, the utility model proposes a new type of necked butt-welded flange to address the shortcomings of the prior art, aiming to solve the problems of severe stress concentration in traditional necked butt-welded flanges, which in turn causes low flange strength, as well as great welding difficulty and low weld strength due to differences in neck specifications.

[0006] The utility model provides a new type of neck butt welding flange, comprising:

[0007] A flange and a neck tube, wherein the flange and the neck tube are an integral structure, and a guide hole is provided in the middle of the flange and the neck tube, wherein:

[0008] A connection arc angle is provided at the connection position between the flange and the neck tube, and the arc radius of the connection arc angle is ≤8mm; the outer wall of the neck tube is provided with a first slope surface and a second slope surface, and the slope difference between the first slope surface and the second slope surface is greater than 10%, and the slope difference is ≤50%.

[0009] Furthermore, a sealing boss is provided on a side of the flange away from the neck tube.

[0010] Furthermore, a first through hole is opened in the middle of the flange, a second through hole is opened at a position corresponding to the first through hole of the neck tube, and a third through hole is opened at a position corresponding to the first through hole of the sealing boss, so that the guide hole is formed between the first through hole, the second through hole and the third through hole.

[0011] Furthermore, the flange is provided with a plurality of mounting holes, and the plurality of mounting holes are arranged side by side along the circumference of the neck tube between the outer side wall of the flange and the sealing boss.

[0012] Furthermore, the mounting hole is a conducting hole.

[0013] Furthermore, the angle between the starting point of the second slope and the inner wall of the neck tube shall not be greater than 40°.

[0014] Furthermore, a side of the sealing boss away from the flange is provided with a plurality of first anti-slip grooves, and a side of the flange connected to the sealing boss is provided with a plurality of second anti-slip grooves;

[0015] Wherein, the first anti-skid groove and the second anti-skid groove are concentric circles, and the center positions of the first anti-skid groove and the second anti-skid groove coincide with each other.

[0016] Furthermore, arc grooves are respectively provided at both ends of the mounting hole, so that when the flange is installed with fixing bolts, the arc grooves are used to guide the installation position of the fixing bolts.

[0017] Furthermore, a plurality of the first anti-skid grooves and the second anti-skid grooves are coated with an anti-rust oil layer.

[0018] Compared with the prior art, the utility model has the beneficial effect that: by adopting an integrated structure between the flange and the neck tube, the complexity of connecting multiple components in the traditional flange manufacturing process is reduced, and the potential risk of connection failure is reduced. By integrally casting or processing the flange and the neck tube, not only the overall strength of the product is improved, but also the production process is simplified and the manufacturing cost is saved. Secondly, the arc radius of the connection position between the flange and the neck tube is controlled to ≤8mm, which effectively reduces the stress concentration phenomenon. In a high pressure or high temperature environment, the flange connection is usually a weak link of stress concentration. Through a reasonable arc transition design, the stress distribution is dispersed, the fatigue and cracks caused by stress concentration are reduced, and the service life and safety of the flange are significantly improved. Finally, the first slope and the second slope are set on the outer wall of the neck tube, and the slope difference is between 10% and 50%. This design optimizes the welding groove. A reasonable slope difference makes it easier to form a uniform and reliable weld during welding. A larger slope difference increases the operating space during welding and reduces the generation of welding defects, while a moderate slope range ensures the mechanical properties and sealing properties of the welded joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the dissected structure of a new type of necked butt welding flange provided in an embodiment of the utility model;

[0020] Figure 2 A top view of a novel neck butt welding flange provided in an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of the local structure of the A embodiment of the utility model;

[0022] Wherein: 100, flange; 200, neck tube; 300, guide hole; 110, sealing boss; 120, mounting hole; 210, first slope surface; 220, second slope surface. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] As an important component of pipeline connection, the neck flange is designed with the neck structure to provide more excellent structural strength and stress distribution performance. It is mainly used in high-pressure, high-temperature or frequently disassembled pipeline systems to ensure the tightness and stability of the connection, significantly reduce the risk of leakage, and improve the convenience of installation and maintenance.

[0028] However, the neck flanges currently on the market generally have a serious problem of stress concentration, which not only weakens the overall strength of the flange, but also shortens its service life, thereby increasing the risk of flange damage and leakage. In addition, due to the difference in neck specifications, the welding difficulty of operators during installation is increased, and the strength of the weld after welding is often low, further affecting the mechanical properties of the flange.

[0029] In view of this, the utility model proposes a new type of necked butt-welded flange to address the shortcomings of the prior art, aiming to solve the problems of severe stress concentration in traditional necked butt-welded flanges, which in turn causes low flange strength, as well as great welding difficulty and low weld strength due to differences in neck specifications.

[0030] like Figure 1-Figure 3 As shown, in some embodiments of the present application, a novel necked butt welding flange comprises: a flange 100 and a neck tube 200. The flange 100 and the neck tube 200 are an integral structure, and a guide hole 300 is provided in the middle of the flange 100 and the neck tube 200, wherein a connection arc angle is provided at the connection position between the flange and the neck tube 200, and the arc radius of the connection arc angle is ≤8mm; the outer wall of the neck tube 200 is provided with a first slope 210 and a second slope 220, and the slope difference between the first slope 210 and the second slope 220 is greater than 10%, and the slope difference is ≤50%.

[0031] Specifically, the integrated structural design of the flange 100 and the neck tube 200 avoids the weak links caused by the connection of components in traditional flange manufacturing. The integrated structure is formed by integral casting or processing, so that the connection between the flange 100 and the neck tube 200 is tighter and more stable. This design not only improves the overall strength of the flange, but also simplifies the production process, reduces the errors in the manufacturing and assembly process, and thus improves the reliability and consistency of the product. Secondly, the connection arc angle set at the connection between the flange 100 and the neck tube 200 achieves a smooth transition by controlling the arc radius of the connection arc angle to ≤8mm. This design effectively disperses the stress concentration at the connection and prevents fatigue and cracks caused by stress concentration. Under harsh working conditions such as high pressure and high temperature, the connection is often the most prone to failure. Through reasonable arc design, the flange can better withstand stress from all directions, extend its service life, and improve overall safety. Finally, the first slope 210 and the second slope 220 set on the outer wall of the neck tube 200 optimize the welding groove design by controlling the slope difference to be greater than 10% and less than 50%. Reasonable slope difference not only increases the convenience of welding operation, but also ensures the quality and strength of the weld. A larger slope difference provides a larger welding operation space and reduces the occurrence of welding defects, while a moderate slope range ensures the mechanical properties and sealing performance of the welded joint. The weld groove designed in this way helps to form a uniform and firm weld and enhances the reliability of the joint.

[0032] It is understandable that the design of the new necked butt welding flange in this application also shows significant advantages in installation and maintenance. The optimized structural design makes the flange installation process easier and reduces the time and cost of on-site commissioning and installation. At the same time, high-quality welded joints reduce the frequency of daily maintenance, extend the normal operation cycle of the equipment, and improve the overall economic benefits. This is particularly important for systems that require frequent disassembly and high-frequency maintenance, especially in the petroleum, chemical, electric power and other industries.

[0033] In some embodiments of the present application, a sealing boss 120 is further provided on a side of the flange 100 away from the neck tube 200 .

[0034] Specifically, by providing a sealing boss 120 on the side of the flange 100 away from the neck tube 200, the sealing performance of the flange is further enhanced. The sealing boss 120 can provide an additional contact area to ensure a better sealing effect during the connection process and prevent leakage. The boss design enables the flange to form a closer contact with the gasket or the mating flange during connection, dispersing the stress at the connection, and improving the sealing effect and reliability.

[0035] In some embodiments of the present application, a first through hole is opened in the middle of the flange 100, a second through hole is opened in the neck tube 200 at a position corresponding to the first through hole, and a third through hole is opened in the sealing boss 120 at a position corresponding to the first through hole, so that a guide hole 300 is formed between the first through hole, the second through hole and the third through hole.

[0036] Specifically, a continuous flow path is formed by a plurality of mutually aligned through holes, thereby ensuring that the fluid can smoothly pass through the flange connection. This design not only improves the flow efficiency of the fluid and reduces the flow resistance, but also effectively avoids the retention and turbulence of the fluid at the flange connection. In addition, the provision of the flow guide hole 300 helps to evenly distribute the fluid pressure, further improving the sealing performance and pressure resistance of the flange connection.

[0037] In some embodiments of the present application, the flange 100 is further provided with a plurality of mounting holes 120 , and the plurality of mounting holes 120 are arranged side by side along the circumference of the neck tube 200 between the outer side wall of the flange 100 and the sealing boss 120 .

[0038] Specifically, the mounting hole 120 is a through hole.

[0039] In some embodiments of the present application, the angle between the starting point of the second slope 220 and the inner wall of the neck tube 200 shall not be greater than 40°.

[0040] Specifically, during the welding process, the starting angle of the slope directly affects the stability and uniformity of welding. An excessively large starting angle may cause the solder to flow prematurely during welding, resulting in instability in the welding process and even welding defects. By limiting the angle between the starting point and the inner wall to no more than 40°, the flow rate of the solder can be effectively controlled, so that it can fill the weld more evenly and stably, thereby improving the welding quality and the reliability of the joint. Secondly, the quality of the welded joint is directly related to the reliability and safety of the flange connection. A suitable starting angle of the slope can ensure the filling and lubrication of the welding material, avoid defects such as pores and cracks during welding, and thus improve the strength and sealing performance of the welded joint. This is particularly important for pipeline systems under high pressure and high temperature environments, which can effectively prevent leakage and failure and ensure the stable operation of the system. Finally, by unifying the restriction of the starting angle, the difficulty of operation during welding can be reduced, the accuracy and stability of the welder's operation can be improved, and the quality and consistency of the welded joint can be guaranteed. This is of great significance for welding process control in large-scale production, and can effectively reduce production costs and improve production efficiency. Therefore, the technical principle of limiting the angle between the starting point of the second slope 220 and the inner wall of the neck tube 200 to no more than 40° not only helps to optimize the stability and uniformity of the welding process, improve the strength and sealing performance of the welded joint, but also improves the controllability and consistency of the welding operation, providing an important guarantee for the efficient and reliable operation of the flange connection.

[0041] In some embodiments of the present application, a plurality of first anti-skid grooves are provided on the side of the sealing boss 120 away from the flange 100, and a plurality of second anti-skid grooves are provided on the side where the flange 100 is connected to the sealing boss 120; wherein the first anti-skid grooves and the second anti-skid grooves are concentric circles, and the center positions of the first anti-skid grooves and the second anti-skid grooves coincide with each other.

[0042] Preferably, the plurality of first anti-skid grooves and the plurality of second anti-skid grooves are coated with an anti-rust oil layer.

[0043] In some embodiments of the present application, arc grooves are respectively provided at both ends of the mounting hole 120, so that when the flange 100 is installed with fixing bolts, the arc grooves are used to guide the installation position of the fixing bolts.

[0044] Specifically, the arc groove can effectively guide the installation position of the fixing bolt, ensuring the alignment and stability of the connection between the bolt and the flange. When the fixing bolt is installed, the arc groove can guide the direction of the bolt so that it accurately enters the installation hole 120 and ensures the correctness of the bolt installation position. This design simplifies the installation process, improves the accuracy and efficiency of the installation, and thus enhances the reliability and stability of the flange connection.

[0045] In the above embodiments, a new type of necked butt welding flange adopts an integrated structure through the flange 100 and the neck tube 200, which reduces the complexity of connecting multiple components in the traditional flange manufacturing process and reduces the potential risk of connection failure. By integrally casting or processing the flange 100 and the neck tube 200, not only the overall strength of the product is improved, but also the production process is simplified and the manufacturing cost is saved. Secondly, the arc radius of the connection position between the flange 100 and the neck tube 200 is controlled to ≤8mm, which effectively reduces the stress concentration phenomenon. In a high pressure or high temperature environment, the flange connection is usually a weak link of stress concentration. Through a reasonable arc transition design, the stress distribution is dispersed, the fatigue and cracks caused by stress concentration are reduced, and the service life and safety of the flange are significantly improved. Finally, the first slope 210 and the second slope 220 set on the outer wall of the neck tube 200 have a slope difference between 10% and 50%, and this design optimizes the welding groove. Reasonable slope difference makes it easier to form a uniform and reliable weld during welding. A larger slope difference increases the operating space during welding and reduces the occurrence of welding defects, while a moderate slope range ensures the mechanical properties and sealing performance of the welded joint.

[0046] 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 neck butt welding flange, characterized in that: include: A flange and a neck tube, wherein the flange and the neck tube are an integral structure, and a guide hole is provided in the middle of the flange and the neck tube, wherein: A connection arc angle is provided at the connection position between the flange and the neck tube, and the arc radius of the connection arc angle is ≤8mm; the outer wall of the neck tube is provided with a first slope surface and a second slope surface, and the slope difference between the first slope surface and the second slope surface is greater than 10%, and the slope difference is ≤50%.

2. A novel necked butt welding flange as claimed in claim 1, characterized in that: A sealing boss is also arranged on a side of the flange away from the neck tube.

3. A new type of neck welding flange as claimed in claim 2, characterized in that: A first through hole is opened in the middle of the flange, a second through hole is opened in the neck tube at a position corresponding to the first through hole, and a third through hole is opened in the sealing boss at a position corresponding to the first through hole, so that the guide hole is formed between the first through hole, the second through hole and the third through hole.

4. A novel necked butt welding flange as claimed in claim 3, characterized in that: The flange is also provided with a plurality of mounting holes, and the plurality of mounting holes are arranged side by side along the circumference of the neck tube between the outer side wall of the flange and the sealing boss.

5. A novel necked butt welding flange as claimed in claim 4, characterized in that: The mounting hole is a conducting hole.

6. A novel necked butt welding flange as claimed in claim 1, characterized in that: The angle between the starting point of the second slope surface and the inner wall of the neck tube shall not be greater than 40°.

7. A novel necked butt welding flange as claimed in claim 2, characterized in that: A plurality of first anti-slip grooves are arranged on a side of the sealing boss away from the flange, and a plurality of second anti-slip grooves are arranged on a side of the flange connected to the sealing boss; Wherein, the first anti-skid groove and the second anti-skid groove are concentric circles, and the center positions of the first anti-skid groove and the second anti-skid groove coincide with each other.

8. A novel necked butt welding flange as claimed in claim 4, characterized in that: Arc grooves are respectively arranged at both ends of the mounting hole, so that when the flange is installed with fixing bolts, the arc grooves are used to guide the installation position of the fixing bolts.

9. A novel necked butt welding flange as claimed in claim 7, characterized in that: A plurality of the first anti-skid grooves and the second anti-skid grooves are coated with an anti-rust oil layer.

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