Large diameter butt welded flange assembly

Abstract

The utility model relates to flange assembly technical field especially is a kind of large-diameter butt joint flange assembly, including flange, flange inner side is inserted with sleeve joint component, sleeve joint component one side is fixedly connected with support component, and support component one end is installed with positioning component, and sleeve joint component inner side is installed with bolt, sleeve joint component includes sleeve plate, sleeve groove is set up in the inner side of sleeve plate, and sleeve plate one side is fixedly connected with insert sleeve, and fixed hole is set up in the inner side of sleeve plate and insert sleeve, support component includes support, and embedding slot and screw hole are set up in the inner side of support, and handle screw rod is spirally connected in the inner side of screw hole, and handle screw rod one end is fixedly connected with limit ring, and positioning component includes pressing plate, and rotating hole is set up in the inner side of pressing plate, in the utility model, this large-diameter flange positioning device breaks through traditional tooling environment limit, reduces the threshold of use in narrow space, is convenient for carrying debugging, avoids interference with other objects, and ensures that butt joint operation is smoothly carried out.

Description

Technical Field

[0001] This utility model relates to the field of flange assembly technology, specifically a large-diameter butt-welding flange assembly. Background Technology

[0002] Large-diameter flange assemblies are standardized mechanical connection units adapted for connecting pipelines or large equipment with larger nominal diameters. They are composed of a large-size flange as the core body and high-strength bolts, nuts, gaskets and other auxiliary components. After aligning the flange bolt holes, they are tightened and pressure is applied to form a reliable seal on the sealing surface. They can be connected by butt welding, flat welding and other methods to adapt to different working conditions. They are widely used in petrochemical, natural gas long-distance pipelines, power engineering, metallurgical equipment and other fields. They have the advantages of strong connection, sealing stability and convenient maintenance. They can meet the detachable docking requirements of large-diameter pipelines or equipment under harsh conditions such as high pressure, high temperature and corrosive media. In large-diameter butt-welding flange assemblies, the neck end face of the flange is precisely aligned with the end face of the pipe, and then the circumferential weld around the joint is welded to form a rigid connection structure that is subjected to overall stress. During the docking of large-diameter flange necks with pipelines, the large size of the workpiece itself poses significant challenges to the assembly and alignment process. In existing technologies, although dedicated positioning fixtures can be used to assist in docking and alignment, in some pipeline installation scenarios, when the working environment is a confined space, the structural dimensions of the dedicated positioning fixtures and the space occupied after unfolding often exceed the carrying capacity of the environment. This not only makes it difficult to move the fixtures to the docking position smoothly, but also makes subsequent installation and commissioning operations impossible to carry out effectively. Furthermore, it is prone to collisions and interference with surrounding pipelines and equipment, seriously affecting the feasibility of the docking operation. Therefore, a large-diameter butt-welding flange assembly is proposed to address the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a large-diameter butt-welding flange assembly to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A large-diameter butt-welding flange assembly includes a flange, a sleeve assembly inserted into the inner side of the flange, a support assembly fixedly connected to one side of the sleeve assembly, a positioning assembly installed at one end of the support assembly, a bolt installed inside the sleeve assembly, the sleeve assembly including a sleeve plate with a sleeve groove on its inner side, a plug fixedly connected to one side of the sleeve plate, and fixing holes on the inner sides of both the sleeve plate and the plug, the support assembly including a bracket with an insert groove and a threaded hole on its inner side, a handle screw screw screwed to the inner side of the threaded hole, a limit ring fixedly connected to one end of the handle screw, and a pressure plate with a rotating hole on its inner side.

[0005] As a further optimization of this utility model, the following features are provided: a plug-in sleeve is inserted into the through hole of the flange, the diameter of the through hole of the flange is the same as the outer diameter of the plug-in sleeve, and the plug-in sleeve is embedded inside the through hole of the flange.

[0006] As a further optimization of this utility model, the bolt screw is inserted into the fixing hole, the two sleeve plates are fixed by the bolt, and the two sleeve plates press against the flange.

[0007] As a further optimization of this utility model, the sleeve plate and the bracket are fixedly connected, and the position of the insert and the bracket is offset.

[0008] As a further optimization of this utility model, one end of the handle screw extends into the interior of the rotating hole, the limiting ring is rotatably connected to the interior of the rotating hole, and the end of the handle screw away from the pressure plate is embedded in the interior of the mounting groove.

[0009] As a further optimization of this utility model, the bracket has a guide hole on its inner side, and a guide post is fixedly connected to one end of the pressure plate. The inner side of the guide hole is slidably connected to the guide post.

[0010] As a further optimization of this utility model, the end of the pressure plate away from the guide post is fixedly connected to an ear seat, a limit hole is opened on the inner side of the ear seat, a limit post is rotatably connected to the inner side of the limit hole, a pressure roller is fixedly connected to one side of the limit post, and the outer side of the pressure roller presses against the outer surface of the pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. In this utility model, by setting up a socket component, a support component and a positioning component, the large-diameter flange positioning device effectively breaks through the environmental usage limitations of traditional special positioning tooling. It adopts a design that can be sleeved on the outside of the pipe fitting and close to the flange end face. The overall size does not exceed the flange diameter. This compact installation method greatly reduces the threshold for use in narrow and confined spaces. It not only facilitates the handling and docking operation of the device, but also provides sufficient convenience for subsequent installation and commissioning. It can effectively avoid interference with the surrounding pipelines and equipment and ensure the smooth progress of docking operations. 2. In this utility model, the structural design of the device, through the setting of the bracket and pressure roller, further improves the shear resistance of the flange and pipe fitting after connection, significantly reduces the risk of the connection stability of the two due to the displacement of the pipe fitting in the later stage, and ensures the long-term reliability of the docking structure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is an exploded structural diagram of the entire utility model; Figure 3 This is a schematic diagram of the socket assembly structure of this utility model; Figure 4 This is a schematic diagram of the support component structure of this utility model; Figure 5 This is a schematic diagram of the positioning component structure of this utility model; Figure 6 This is a schematic diagram of the support structure of this utility model; Figure 7 This utility model Figure 6 A schematic diagram of the structure at point A.

[0013] In the diagram: 1. Flange; 2. Socket assembly; 21. Sleeve plate; 22. Sleeve groove; 23. Insert sleeve; 24. Fixing hole; 3. Support assembly; 31. Bracket; 32. Mounting groove; 33. Threaded hole; 34. Handle screw; 35. Limiting ring; 36. Guide hole; 4. Positioning assembly; 41. Pressure plate; 42. Rotary hole; 43. Guide post; 44. Ear seat; 45. Limiting hole; 46. Limiting post; 47. Pressure roller; 5. Bolts; 6. Pipes. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0016] Please see Figures 1-7 This utility model provides a technical solution: A large-diameter butt-welding flange assembly includes a flange 1, a sleeve assembly 2 inserted into the inner side of the flange 1, a support assembly 3 fixedly connected to one side of the sleeve assembly 2, a positioning assembly 4 installed at one end of the support assembly 3, a bolt 5 installed inside the sleeve assembly 2, the sleeve assembly 2 includes a sleeve plate 21, a sleeve groove 22 is opened inside the sleeve plate 21, a plug 23 is fixedly connected to one side of the sleeve plate 21, and fixing holes 24 are opened inside both the sleeve plate 21 and the plug 23, the support assembly 3 includes a bracket 31, an insert groove 32 and a threaded hole 33 are opened inside the bracket 31, a handle screw 34 is screwed inside the threaded hole 33, a limit ring 35 is fixedly connected to one end of the handle screw 34, and the positioning assembly 4 includes a pressure plate 41, a rotating hole 42 is opened inside the pressure plate 41.

[0017] As a further implementation of this solution, a plug-in sleeve 23 is inserted into the through hole of the flange 1. The diameter of the through hole of the flange 1 is the same as the outer diameter of the plug-in sleeve 23. The plug-in sleeve 23 is embedded inside the through hole of the flange 1. Through the above setting, this structural design realizes the precise matching and insertion of the plug-in sleeve 23 and the flange 1, ensuring the coaxiality and stability of the connection between the two, laying a solid foundation for the subsequent positioning and alignment of the flange 1 and the pipe 6, effectively avoiding the subsequent welding misalignment problem caused by the initial assembly deviation, and improving the accuracy and reliability of the docking structure. As a further implementation of this scheme, the screw of bolt 5 is inserted into the fixing hole 24, and the two sleeve plates 21 are fixed by bolt 5. The two sleeve plates 21 press against the flange 1. Through the above settings, the cooperation between bolt 5 and fixing hole 24 realizes the firm fixation of the two sleeve plates 21. The pressing action of sleeve plates 21 on flange 1 enhances the assembly stability of flange 1, prevents flange 1 from shifting during positioning and welding, ensures the continuity of docking operation, and improves the overall structural rigidity of the device, providing stable support for subsequent pipe positioning. As a further implementation of this solution, the sleeve 21 is fixedly connected to the bracket 31, and the position of the insert 23 is offset from that of the bracket 31. Through the above settings, the fixed connection between the sleeve 21 and the bracket 31 ensures the reliable connection between the positioning adjustment mechanism and the foundation bearing structure. The offset design between the insert 23 and the bracket 31 not only avoids mutual interference between structures, but also optimizes the internal spatial layout of the device, making the overall structure more compact, further adapting to the use requirements of narrow working spaces, and improving the spatial adaptability of the device. As a further implementation of this solution, one end of the handle screw 34 extends into the interior of the rotating hole 42, and the limiting ring 35 is rotatably connected to the interior of the rotating hole 42. The end of the handle screw 34 away from the pressure plate 41 is embedded in the interior of the mounting groove 32. Through the above settings, the nesting and cooperation between the handle screw 34 and the rotating hole 42 and the mounting groove 32, as well as the rotatable connection design of the limiting ring 35, enable the rotation of the handle screw 34 to be stably converted into the linear displacement of the pressure plate 41, ensuring the stability and controllability of the positioning adjustment process, avoiding jamming during the adjustment process, and improving the ease of operation. At the same time, this structure enhances the load-bearing capacity of the adjustment mechanism and adapts to the positioning requirements of large-diameter pipe fittings. As a further implementation of this solution, a guide hole 36 is provided on the inner side of the bracket 31, and a guide post 43 is fixedly connected to one end of the pressure plate 41. The inner side of the guide hole 36 is slidably connected to the guide post 43. Through the above arrangement, the sliding fit structure between the guide hole 36 and the guide post 43 plays a precise guiding role in the movement of the pressure plate 41, effectively preventing the pressure plate 41 from twisting and shifting during the adjustment process, ensuring that the pressure plate 41 drives the subsequent positioning components to move along the preset direction, ensuring the accuracy of the pipe 6 axis adjustment, thereby improving the accuracy of the flange and pipe fitting docking and reducing the risk of welding defects. As a further implementation of this solution, the end of the pressure plate 41 away from the guide post 43 is fixedly connected to an ear seat 44. A limiting hole 45 is opened on the inner side of the ear seat 44. A limiting post 46 is rotatably connected to the inner side of the limiting hole 45. A pressure roller 47 is fixedly connected to one side of the limiting post 46. The outer side of the pressure roller 47 presses against the outer surface of the pipe 6. Through the above arrangement, the rotatable connection between the limiting post 46 and the limiting hole 45 allows the pressure roller 47 to rotate adaptively with the surface of the pipe 6 when it contacts and presses against the pipe 6, avoiding wear on the outer surface of the pipe 6 caused by excessive friction between the two. At the same time, the stable pressing of the pressure roller 47 against the pipe 6 ensures the firmness of the pipe 6 after positioning, making the axis of the pipe 6 and the axis of the flange accurately aligned, providing a guarantee for high-quality welding and improving the long-term stability of the docking structure.

[0018] Workflow: When positioning the flange 1 and pipe 6 that need to be welded together, first align the insert 23 with the through hole of the flange 1 and insert the insert 23 into the through hole of the flange 1. At this time, the outer side of the insert 23 is aligned with the inner side of the through hole of the flange 1, so that the sleeve 21 fits against the flange 1. After the two flanges 1 are assembled with the sleeve assembly 2 respectively, align the through holes between the two flanges 1 and insert the screws of the bolts 5 into the fixing holes 24. Fix the two flanges 1 and the two sleeves 21 with the bolts 5. Then place the end of the pipe 6 into the sleeve groove 22. The sleeve 21 supports the end of the pipe 6, and the end of the pipe 6 is roughly fitted against the flange 1. Then, operate the upper and lower handle screws 34. By rotating the handle screw 34, since the handle screw 34 is threaded into the threaded hole 33, the handle screw 34 will be displaced. Since the limiting ring 35 is rotatably connected to the rotating hole 42, the handle screw 34 will drive the pressure plate 41 to move through the limiting ring 35. The pressure plate 41 slides in the guide hole 36 through the guide post 43 to prevent the pressure plate 41 from twisting. When the pressure roller 47 contacts the pipe 6, the pressure roller 47 will push the pipe 6 to move. After the pressure roller 47 contacts the surface of the pipe 6, the pressure roller 47 will rotate to a certain extent. The rotation of the pressure roller 47 can prevent the outer surface of the pipe 6 from being worn due to excessive friction. The positioning components 4 at the upper and lower ends can make the axis of the pipe 6 gradually align with the axis of the sleeve plate 21. Next, based on the above principle, operate the handle screws 34 at both ends. The positioning components 4 at both ends press the pipe 6 through the pressure rollers 47. Since the axis of the pipe 6 is basically aligned with the axis of the sleeve plate 21 at this time, the two pressure rollers 47 on the same pressure plate 41 press the pipe 6. The center of the distance between the two pressure rollers 47 is on the same horizontal or vertical plane as the axis of the insert 23. Under the pressure of the two pressure rollers 47, the axis of the end of the pipe 6 is adjusted, so that the axis of the pipe 6 is aligned with the axis of the sleeve plate 21, and then the axis of the pipe 6 is aligned with the axis of the flange 1. Finally, the positioning components 4 at the upper and lower ends are tightened to the end of the pipe 6 to complete the positioning adjustment. There is a gap between the pressure rollers 47 and the flange 1. During welding, the flange 1 and the pipe 6 can be welded through the sleeve groove 22 to complete the butt welding work. Based on the above principles, this device effectively overcomes the environmental limitations of traditional dedicated positioning fixtures. It adopts a design that can be fitted onto the outside of pipe 6 and against the end face of flange 1. The overall size of the device does not exceed the diameter of flange 1. This compact installation method significantly lowers the barrier to use in confined spaces, which not only facilitates the handling and docking of the device, but also provides ample convenience for subsequent installation and commissioning. It avoids interference with surrounding pipelines and equipment, ensuring the smooth progress of docking operations. At the same time, the structural design of the device further improves the shear resistance of flange 1 after it is connected to pipe 6, significantly reducing the risk of decreased connection stability due to pipe 6 displacement in the later stages, and ensuring the long-term reliability of the docking structure.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-diameter butt-welding flange assembly, comprising a flange (1), characterized in that: A socket assembly (2) is inserted into the inside of the flange (1), a support assembly (3) is fixedly connected to one side of the socket assembly (2), a positioning assembly (4) is installed at one end of the support assembly (3), and a bolt (5) is installed inside the socket assembly (2). The socket assembly (2) includes a sleeve plate (21), a sleeve groove (22) is provided on the inner side of the sleeve plate (21), and a plug (23) is fixedly connected to one side of the sleeve plate (21). Fixing holes (24) are provided on the inner sides of both the sleeve plate (21) and the plug (23). The support assembly (3) includes a bracket (31), the bracket (31) has an insert groove (32) and a threaded hole (33) on its inner side, a handle screw (34) is screwed to the inner side of the threaded hole (33), and a limit ring (35) is fixedly connected to one end of the handle screw (34). The positioning component (4) includes a pressure plate (41), and a rotating hole (42) is provided on the inner side of the pressure plate (41).

2. The large-diameter butt-welding flange assembly according to claim 1, characterized in that: The flange (1) has a through hole on the inside of which a plug (23) is inserted. The diameter of the through hole of the flange (1) is the same as the outer diameter of the plug (23). The plug (23) is embedded inside the through hole of the flange (1).

3. A large-diameter butt-welding flange assembly according to claim 1, characterized in that: The screw of the bolt (5) is inserted into the fixing hole (24), and the two sleeves (21) are fixed by the bolt (5). The two sleeves (21) press against the flange (1).

4. A large-diameter butt-welding flange assembly according to claim 3, characterized in that: The sleeve (21) is fixedly connected to the bracket (31), and the position of the insert (23) is offset from that of the bracket (31).

5. A large-diameter butt-welding flange assembly according to claim 1, characterized in that: One end of the handle screw (34) extends into the interior of the rotating hole (42), the limiting ring (35) is rotatably connected to the interior of the rotating hole (42), and the end of the handle screw (34) away from the pressure plate (41) is embedded in the interior of the mounting groove (32).

6. A large-diameter butt-welding flange assembly according to claim 1, characterized in that: The bracket (31) has a guide hole (36) on its inner side, and a guide post (43) is fixedly connected to one end of the pressure plate (41). The inner side of the guide hole (36) is slidably connected to the guide post (43).

7. A large-diameter butt-welding flange assembly according to claim 5, characterized in that: The end of the pressure plate (41) away from the guide post (43) is fixedly connected to an ear seat (44). A limit hole (45) is opened on the inner side of the ear seat (44). A limit post (46) is rotatably connected to the inner side of the limit hole (45). A pressure roller (47) is fixedly connected to one side of the limit post (46). The outer side of the pressure roller (47) presses against the outer surface of the pipe (6).

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