A control device for welding deformation of a diagonal nozzle of a pressure vessel

Abstract

The utility model discloses a kind of control device suitable for pressure vessel oblique connecting pipe welding deformation, including flange fixed assembly and adjustable support rod, wherein, multiple installation units are provided on flange fixed assembly, flange fixed assembly includes circular flange fixing piece, and multiple installation units are interval setting along the center of circular flange fixing piece, and flange fixed assembly is fixed flange by installation unit;Adjustable support rod is rotatably connected with the edge of flange fixed part, and, adjustable support rod can telescopic adjust the length of itself.By setting the combination structure of flange fixed assembly and adjustable support rod, active rigid support to oblique connecting pipe in welding process is realized;Multiple installation units on flange fixed assembly are evenly distributed around center, improve connection reliability;Adjustable support rod has length and angle double regulation ability, can flexibly adjust support force direction and size according to actual welding position, effectively resist deformation caused by welding thermal stress.

Description

Technical Field

[0001] This utility model belongs to the field of welding of pressure vessels for offshore platforms, and in particular relates to a control device for welding deformation of oblique cross-connectors of pressure vessels. Background Technology

[0002] In the production process of pressure vessels on offshore oil platforms, the thermal stress generated during nozzle welding and the subsequent cooling and shrinkage effects can easily lead to dimensional deformation. Welding of oblique nozzles is particularly challenging, often resulting in welding deformation and consequently affecting the dimensional accuracy of the components. Currently, existing equipment does not provide ideal control over this deformation.

[0003] Therefore, there is an urgent need to design a control device suitable for welding deformation of oblique cross-connectors in pressure vessels to solve the problems mentioned above. Utility Model Content

[0004] To address the technical problem mentioned in the background art that the existing devices do not achieve ideal control over the deformation of skewed pipe joints, a control device suitable for the welding deformation of skewed pipe joints in pressure vessels is provided.

[0005] To achieve the above objectives, the specific technical solution of this utility model for a control device applicable to welding deformation of oblique cross-connecting pipes in pressure vessels is as follows: A control device for welding deformation of oblique cross-joints in pressure vessels, comprising: The flange fixing assembly has multiple mounting units. The flange fixing assembly includes a circular flange fastener, and the multiple mounting units are spaced apart along the center of the circular flange fastener. The flange fixing assembly fixes the flange through the mounting units. The adjustable support rod is rotatably connected to the edge of the flange fixing part, and the adjustable support rod can extend and retract to adjust its length.

[0006] Furthermore, the flange fixing assembly also includes a fixing plate, which is disposed on the outer periphery of the flange fixing member, and the fixing plate and the flange fixing member form an inner circle and outer cross structure.

[0007] Furthermore, the mounting unit is also disposed on the fixing plate, and at least one fixing plate is provided with the mounting unit.

[0008] Furthermore, a fixed plate without an installation unit is used for rotatable connection with the adjustable support rod.

[0009] Furthermore, the mounting unit includes a mounting groove and a fixing pin, with the fixing pin disposed within the mounting groove and fixing the flange.

[0010] Furthermore, the adjustable support rod includes a rotating block, and a connecting arc plate is provided on the fixed plate, with the rotating block and the connecting arc plate being rotatably connected.

[0011] Furthermore, the adjustable support rod includes: Support tube; Bolts are rotatably connected to the support tube, which can be rotated relative to the bolts to adjust the length of the adjustable support rod. A circular plate, one side of which is connected to the bottom of the rotating block, and the other side is connected to a bolt.

[0012] Furthermore, a nut is provided at one end of the support tube near the bolt, and the support tube is rotatably connected to the bolt through the nut.

[0013] Furthermore, at least two connecting arc plates are provided and spaced apart.

[0014] Furthermore, the flange fixing assembly also includes a rotating pin, which is inserted into the rotating block and the connecting arc plate to make the rotating block and the connecting arc plate rotatably connected.

[0015] This utility model's control device for welding deformation of skewed pipe fittings in pressure vessels has the following advantages: By combining a flange fixing assembly with an adjustable support rod, it achieves active rigid support for the skewed pipe fitting during welding. Multiple mounting units on the flange fixing assembly are evenly distributed around the center, enabling stable clamping of pipe flanges of different specifications and improving connection reliability. The adjustable support rod has both length and angle adjustment capabilities, allowing flexible adjustment of the support force direction and magnitude according to the actual welding position, effectively resisting bending or torsional deformation caused by welding thermal stress. Compared to traditional rigid supports, this structure is highly adaptable, easy to assemble and disassemble, and significantly improves welding accuracy and operational efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the control device for welding deformation of oblique cross-connectors of pressure vessels according to the present invention; Figure 2 This is a structural schematic diagram of the flange fixing assembly of this utility model; Figure 3 This is a structural schematic diagram from another perspective of the control device for welding deformation of oblique cross-connectors of pressure vessels according to this utility model; Figure 4 This is a schematic diagram of the adjustable support rod of this utility model.

[0017] Explanation of markings in the diagram: Flange fixing assembly; 11. Mounting unit; 111. Mounting groove; 112. Fixing pin; 12. Flange fastener; 13. Fixing plate; 14. Connecting arc plate; 15. Rotating pin; 21. Adjustable support rod; 22. Rotating block; 23. Support tube; 24. Bolt; 25. Circular plate; 26. Nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0020] The following is a reference to the appendix. Figure 1 To be continued Figure 4 This invention describes a control device for welding deformation of oblique cross-connectors in pressure vessels.

[0021] This embodiment provides a control device suitable for controlling welding deformation of oblique cross-section pipes in pressure vessels. Figure 1 This is a schematic diagram of the control device for welding deformation of oblique cross-connectors of pressure vessels according to this embodiment; Figure 2 This is a structural schematic diagram of the flange fixing assembly in this embodiment; as shown Figure 1 and Figure 2 As shown, the control device for welding deformation of the oblique cross-connector of a pressure vessel includes a flange fixing assembly 1 and an adjustable support rod 2. The flange fixing assembly 1 is provided with multiple mounting units 11. The flange fixing assembly 1 includes a circular flange fixing part 12, and the multiple mounting units 11 are spaced apart along the center of the circular flange fixing part 12. The flange fixing assembly 1 fixes the flange through the mounting units 11. The adjustable support rod 2 is rotatably connected to the edge of the flange fixing part, and the adjustable support rod 2 can extend and retract to adjust its length.

[0022] Understandably, by setting up a combined structure of flange fixing assembly 1 and adjustable support rod 2, active rigid support is achieved for the oblique cross-connector during the welding process. Multiple mounting units 11 on the flange fixing assembly 1 are evenly distributed around the center, enabling it to stably clamp flanges of different specifications and improve connection reliability. The adjustable support rod 2 has both length and angle adjustment capabilities, allowing for flexible adjustment of the support force direction and magnitude according to the actual welding position, effectively resisting bending or torsional deformation caused by welding thermal stress. Compared to traditional rigid supports, this structure is highly adaptable, easy to assemble and disassemble, and significantly improves welding accuracy and operational efficiency.

[0023] Furthermore, such as Figure 2 As shown, the flange fixing assembly 1 also includes a fixing plate 13, which is disposed on the outer periphery of the flange fixing member 12, and the fixing plate 13 and the flange fixing member 12 form an inner circle and outer cross structure.

[0024] Understandably, the "inner circle, outer cross" structural design ensures that the inner circular portion of the flange fastener 12 precisely matches the shape of the connecting flange, achieving concentric positioning; the outer cross-shaped fixing plate 13 provides a multi-directional connection foundation for the subsequent support structure. This integrated structure not only enhances overall rigidity but also facilitates the rational layout of the installation unit 11 and support rods, avoiding stress concentration. Simultaneously, the "cross" extension arm provides four orthogonal expansion interfaces, allowing for the selection of the optimal support orientation when dealing with connecting pipes at complex tilt angles, thus improving the versatility and stability of the device.

[0025] Furthermore, such as Figure 1 and Figure 2 As shown, the mounting unit 11 is also disposed on the fixing plate 13, and at least one fixing plate 13 is provided with the mounting unit 11.

[0026] Understandably, placing the mounting unit 11 on the fixing plate 13 fully utilizes the spatial advantages of the "outer cross" structure, allowing the flange fixing points to extend outwards from the central area, forming a larger diameter constraint circumference and significantly enhancing the torsional resistance and stability of the flange connection. Especially when the nozzle experiences eccentric loads or large angles of inclination, this multi-point outward-expanding fixing method effectively prevents the flange from rotating or shifting during welding, further ensuring welding precision.

[0027] Furthermore, the mounting plate 13 without the mounting unit 11 is not rotatably connected to the adjustable support rod 2.

[0028] Understandably, by allocating differentiated functions—that is, some fixed plates 13 are used for mounting flanges (with mounting units 11), while the remaining fixed plates 13 without mounting units 11 are dedicated to connecting adjustable support rods 2—structural functional zoning optimization is achieved. This design avoids spatial interference between mounting units 11 and support rods, simplifies the assembly process, and ensures that the support rod connection position is far from the flange fastening area, reducing the risk of local stress superposition. In addition, the support rod connection point is located at the end of the fixed plate 13 without mounting units 11, which helps to extend the lever arm, improve lever stability, and enhance the overall resistance to deformation.

[0029] Figure 3 This is a schematic diagram of the control device for welding deformation of the oblique cross-connector of a pressure vessel, as shown in this embodiment, from another perspective. Furthermore, such as Figure 1 and Figure 3 As shown, the mounting unit 11 includes a mounting groove 111 and a fixing pin 112. The fixing pin 112 is disposed in the mounting groove 111 and fixes the flange.

[0030] Understandably, the mounting groove 111, in conjunction with the retaining pin 112, forms a quick-locking mechanism, achieving radial limiting and axial locking of the flange without the need for additional nuts 25 or tools. The mounting groove 111 allows for a certain range of fine-tuning displacement, adapting to flange standards with different hole spacings and improving the compatibility of the device; after insertion, the retaining pin 112 can be locked by a pin cap or snap ring to prevent loosening. This structure is easy to operate and responds quickly, making it particularly suitable for high-paced construction environments such as offshore platforms, significantly reducing preparation time and improving on-site operational safety and efficiency.

[0031] Figure 4 This is a schematic diagram of the adjustable support rod in this embodiment.

[0032] Furthermore, such as Figures 2-4 As shown, the adjustable support rod 2 includes a rotating block 21, and a connecting arc plate 14 is provided on the fixed plate 13. The rotating block 21 is rotatably connected to the connecting arc plate 14.

[0033] Understandably, the introduction of the rotating block 21 and the rotating arc plate 14 allows the adjustable support rod 2 to swing freely within a certain arc range, achieving continuous adjustment of the support angle. The design of the connecting arc plate 14 limits the rotation range, preventing excessive deflection from causing structural instability, while guiding the support rod within a reasonable stress range. This hinged structure allows the support rod to automatically align with changes in the pipe's tilt angle, ensuring that the support force always acts perpendicularly on the cylinder surface, maximizing its anti-deformation performance. It is particularly suitable for welding scenarios involving multi-angle, non-standard oblique pipes.

[0034] Furthermore, such as Figure 4As shown, the adjustable support rod 2 includes a support tube 22, a bolt 23 and a circular plate 24. The bolt 23 is rotatably connected to the support tube 22, and the support tube 22 can be rotated relative to the bolt 23 to adjust the length of the adjustable support rod 2. One side of the circular plate 24 is connected to the bottom of the rotating block 21, and the other side is connected to the bolt 23.

[0035] Understandably, this structure constructs a mechanical helical telescopic system: by rotating the support tube 22, relative movement between it and the bolt 23 is achieved, enabling stepless length adjustment. The circular plate 24, acting as a transition connector, securely welds the rotating block 21 to the bolt 23, transmitting the thrust from the support tube 22 to the entire flange fixing assembly 1. This design requires no hydraulic or electric actuators; length adjustment is achieved solely through manual rotation. It is simple, reliable, and has low maintenance costs, making it suitable for use in confined spaces or explosion-proof environments. Furthermore, the adjustment process is smooth and controllable, avoiding impact deformation caused by sudden loading.

[0036] Furthermore, a nut 25 is provided at one end of the support tube 22 near the bolt 23, and the support tube 22 is rotatably connected to the bolt 23 through the nut 25.

[0037] Understandably, the addition of a welded nut 25 to the end of the support tube 22, forming an internal threaded fit with the bolt 23, greatly improves the connection strength and transmission efficiency of the telescopic mechanism. Compared to directly machining threads on the tube wall, the welded nut 25 can be made of high-strength material and ensures thread precision, avoiding structural weakening of thin-walled steel tubes due to thread cutting. Furthermore, after the nut 25 is integrated with the support tube 22, simply rotating the support tube 22 drives the entire rod to extend or retract, making operation intuitive and convenient. Moreover, once locked, it is not prone to springback, ensuring long-term stability of the support.

[0038] Furthermore, at least two connecting arc plates 14 are provided and spaced apart.

[0039] It is understandable that, such as Figure 2 As shown, two or more spaced connecting arc plates 14 provide multi-point support and guidance for the rotating block 21, significantly improving the stability and load-bearing capacity of the rotating connection. The combined action of multiple arc plates restricts the swaying of the rotating block 21 in unexpected directions, preventing loosening or accelerated wear caused by eccentric loading. Simultaneously, the multi-arc plate structure distributes the reaction force transmitted from the support rod, reducing the stress level at individual connection points and extending service life. This design is particularly suitable for welding large pressure vessels subjected to significant support forces.

[0040] Furthermore, such as Figure 2 and Figure 3 As shown, the flange fixing assembly 1 also includes a rotating pin 15, which is inserted into the rotating block 21 and the connecting arc plate 14 so that the rotating block 21 and the connecting arc plate 14 are rotatably connected.

[0041] Understandably, the hinged connection between the rotating block 21 and the connecting arc plate 14 is achieved by inserting the rotating pin 15. This design is simple, easy to assemble and disassemble, and possesses good shear resistance. Cotter pins or retaining rings can be added to both ends of the rotating pin 15 to prevent detachment and ensure a safe and reliable connection. This pin structure allows the support rod to rotate flexibly within the arc plate's defined range, meeting installation requirements at different oblique angles while maintaining the compactness of the connection node. Compared to welding or threaded connections, pin connections are easier to maintain and replace later, reducing the overall maintenance costs throughout the equipment's lifecycle.

[0042] The steps for using the above-mentioned control device for welding deformation of oblique cross-section pipes in pressure vessels are as follows: 1. Secure the flange fixing assembly 1 to the flange face of the oblique cross pipe using the mounting unit 11.

[0043] 2. Adjust the angle of the rotating block 21 so that the adjustable support rod 2 is adjusted to the optimal support angle and the two are fastened by the rotating pin 15.

[0044] 3. Rotate the support rod 2 to extend and retract, so that the support tube 22 is firmly supported to the container. The adjustable support rod 2 plays a supporting and fastening role between the container body and the flange, and then welding can be carried out.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A control device for welding deformation of oblique cross-joints in pressure vessels, characterized in that, include: The flange fixing assembly has multiple mounting units. The flange fixing assembly includes a circular flange fastener, and the multiple mounting units are spaced apart along the center of the circular flange fastener. The flange fixing assembly fixes the flange through the mounting units. The adjustable support rod is rotatably connected to the edge of the flange fixing part, and the adjustable support rod can extend and retract to adjust its length.

2. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 1, characterized in that, The flange fixing assembly also includes a fixing plate, which is disposed on the outer periphery of the flange fixing member, and the fixing plate and the flange fixing member form an inner circle and outer cross structure.

3. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to any one of claims 1 or 2, characterized in that, The mounting unit is also provided on the fixing plate, and at least one fixing plate is provided with the mounting unit.

4. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 3, characterized in that, The fixed plate without a mounting unit is used for rotatable connection with the adjustable support rod.

5. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 3, characterized in that, The mounting unit includes a mounting groove and a fixing pin. The fixing pin is located in the mounting groove and fixes the flange.

6. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 2, characterized in that, The adjustable support rod includes a rotating block, and a connecting arc plate is provided on the fixed plate. The rotating block and the connecting arc plate are rotatably connected.

7. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 6, characterized in that, The adjustable support rod includes: Support tube; Bolts are rotatably connected to the support tube, which can be rotated relative to the bolts to adjust the length of the adjustable support rod. A circular plate, one side of which is connected to the bottom of the rotating block, and the other side is connected to a bolt.

8. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 7, characterized in that, A nut is provided at one end of the support tube near the bolt, and the support tube is rotatably connected to the bolt through the nut.

9. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to claim 6, characterized in that, There are at least two connecting arc plates, spaced apart.

10. The control device for welding deformation of oblique cross-section pipes of pressure vessels according to any one of claims 6 or 9, characterized in that, The flange fixing assembly also includes a rotating pin, which is inserted into the rotating block and the connecting arc plate to make the rotating block and the connecting arc plate rotatably connected.

Images