Variable-angle saddle-shaped groove for large tube seat of header
By designing a saddle-shaped bevel of large conduit seat with varying angles, the time-consuming waste problem caused by the large angle of the traditional welding connection side bevel is solved, the welding efficiency and cost are reduced, and the weld quality is improved.
Patent Information
- Application Number
- CN202421135363.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The traditional welding connection side bevel angle is large, which consumes time-consuming waste, resulting in low welding efficiency and high cost.
Design a saddle-shaped bevel of large tube seat with variable angles. By setting the angle between the 45-degree butt surface and the connecting side bevel, and achieving continuous changes in the angle on the saddle-shaped curve to ensure filling during welding. The angle is fixed to 45°, which reduces welding filling and facilitates gradient processing through CNC machine tools.
The welding filling amount is reduced, the welding material and labor cost is saved, the weld quality is improved, and due to the angle design, the welding operation space is sufficient, the processing cost is reduced, and the welding efficiency is improved.
Smart Images
Figure CN222327043U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of welding, in particular to a saddle-shaped groove of a large pipe seat of a header with a variable angle. Background Art
[0002] Fusion welding is the main process form of pipeline welding, including arc welding, gas metal arc welding, submerged arc welding, etc. From the development history, it has evolved from arc welding, semi-automatic welding to automatic welding. Arc welding is a common process method for pipeline welding, which is divided into two types: upward vertical welding and downward vertical welding. The arc of the upward vertical welding moves from bottom to top, and uses high-cellulose electrodes and low-hydrogen electrodes. The gap between the pipe ends is large, and the arc extinguishing operation method is used to complete the welding, and the thickness of the weld layer is large; the arc of the downward vertical welding moves downward, and the electrodes are used in the same way as the upward vertical welding, but the thickness of the weld layer is thinner, the gap between the pipe ends is small, and a large current, multi-layer, and fast welding method is used. The technology is simple and easy to master, and the welding efficiency is higher.
[0003] In the pipeline profile welding project, the straight pipe to be welded is generally processed with a connecting side bevel, that is, when butt welding is performed, appropriate opening treatment or chamfering treatment must be performed, and the connecting side bevel adopts a "V" type or "I" type connecting side bevel according to the wall thickness of the steel pipe. The pipeline connecting side bevel is made by a connecting side bevel machine, and the surface of the connecting side bevel is required to be neat and smooth to prevent unqualified pipe ends from being butt welded. The traditional welding connection side bevel has a large angle, which is time-consuming and wasteful. To this end, it is necessary to propose a variable-angle saddle-shaped bevel for the header large pipe seat in view of the defects of the traditional welding connection side bevel having a large angle, which is time-consuming and wasteful. Utility Model Content
[0004] Based on this, it is necessary to propose a saddle-shaped groove of the header large pipe seat with a variable angle to address the defects of traditional welding connection, which has large side groove angle, time-consuming and wasteful.
[0005] The utility model provides a saddle-shaped groove of a large pipe seat of a header with a variable angle, comprising a connecting pipe and a connecting seat, wherein the connecting seat is provided with a butt joint surface, and the connecting pipe is provided with a connecting side groove, wherein the butt joint surface and the connecting side groove are connected by fusion welding, and the angle between the end of the connecting side groove and the butt joint surface is 45 degrees, and the angle between the connecting side groove close to the side wall of the connecting pipe and the butt joint surface is greater than or equal to 30 degrees and less than or equal to 45 degrees.
[0006] Preferably, the end of the connecting side groove transitions smoothly to the connecting side groove near the side wall of the connecting pipe.
[0007] Preferably, the butt joint surface is a curved surface.
[0008] Preferably, each center of curvature of the butt joint surface is arranged away from the connecting side groove.
[0009] Preferably, the angle between the tangent of the butt joint surface and the tangent of one of the connecting side grooves is 45 degrees; the point of intersection of the tangent of the butt joint surface is defined as the first point of intersection, and the point of intersection of the tangent of the connecting side groove is defined as the second point of intersection.
[0010] Preferably, the first tangent point of the butt joint surface corresponds one-to-one to the second tangent point of the connecting side groove.
[0011] Preferably, there is at least one angle between the end of the connecting side groove and the connecting side groove close to the side wall of the connecting pipe; the vertex of the angle is defined as the base point.
[0012] Preferably, the butt joint surface is a plane.
[0013] Preferably, the number of the base points is greater than or equal to 1, and the straight-line distance between the base points close to the inner wall of the connecting tube and the inner wall of the connecting tube is 20 mm.
[0014] Preferably, the angle between the vertical plane passing through the base point and the intersection of the connecting side groove is 165 degrees.
[0015] Technical advantages of this utility model:
[0016] 1. The groove angle of the connecting side of the connecting pipe is not fixed, and the angle of the parent material (tangent) on both sides of the weld cross section is fixed at 45°, forming a groove that changes continuously along the saddle-shaped intersection line, ensuring that the filling angle at any position of the saddle-shaped curve during the welding process is 45°.
[0017] 2. The angle between the connecting side groove near the side wall of the connecting pipe and the butt surface is greater than or equal to 30 degrees and less than or equal to 45 degrees. For ultra-thick connectors, the weld section at the shoulder position is designed to be variable angle. Ensure that there is enough welding operation space (45°) at the root of the weld, and reduce the angle (30°) on the outside of the weld to reduce the welding filler to form a double V-shaped groove similar to that in the butt weld.
[0018] 3. Whether it is the angle change along the circumference of the saddle shape or the angle change along the wall thickness direction, the CNC machine tool can easily realize the gradual processing. The structure of the utility model will not increase the processing cost due to the complexity of the groove, but can reduce the cutting amount in the processing process.
[0019] 4. Reduce the welding filling volume, saving welding materials and labor costs. In particular, the unit price of high-grade welding materials may exceed 200 yuan / KG, and a φ219×45 joint may require 40KG welding materials and 2.5 days of work. Even according to the technical ideas of the utility model, reducing the groove angle can reduce the filling volume to a certain extent, and the reduction is obvious. And the bottom of the saddle-shaped shoulder weld maintains the traditional welding requirements, does not affect the welder's operation, and improves the weld quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, so that other features, purposes and advantages of the present invention become more obvious. The drawings and descriptions of the exemplary embodiments of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0021] Figure 1 A schematic structural diagram of a saddle-shaped groove of a large pipe seat of a header with a variable angle provided in one embodiment of the utility model.
[0022] Figure 2 A schematic structural diagram of a saddle-shaped groove of a header large pipe seat with a variable angle provided in yet another embodiment of the utility model.
[0023] Figure 3 A schematic diagram of a comparative structure of a saddle-shaped groove of a header large pipe seat with a variable angle provided in one embodiment of the utility model.
[0024] Figure 4 A schematic structural diagram of a saddle-shaped groove of a header large pipe seat with a variable angle provided in yet another embodiment of the utility model.
[0025] Figure 5 A schematic diagram of the comparative structure of a saddle-shaped groove of a header large pipe seat with a variable angle provided in another embodiment of the utility model.
[0026] Reference numerals: connecting pipe 1 ; connecting side groove 11 ; connecting seat 2 ; butt joint 21 . DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0028] The utility model provides a saddle-shaped groove of a large pipe seat of a header with a variable angle.
[0029] like Figures 1 to 5As shown, in one embodiment of the utility model, a saddle-shaped groove of a large pipe seat of a header with a variable angle includes a connecting pipe 1 and a connecting seat 2, wherein the connecting seat 2 is provided with a docking surface 21, and the connecting pipe 1 is provided with a connecting side groove 11, wherein the docking surface 21 is connected to the connecting side groove 11 by fusion welding, and the angle between the end of the connecting side groove 11 and the docking surface 21 is 45 degrees, and the angle between the connecting side groove 11 close to the side wall of the connecting pipe 1 and the docking surface 21 is greater than or equal to 30 degrees and less than or equal to 45 degrees.
[0030] Specifically, pipeline welding is a highly technical job, and its welding quality is directly related to the safety performance and service life of the pipeline. Therefore, high-pressure pipeline welding must follow relevant national standards and specifications, strictly control the technical requirements of welding materials, welding methods, welding process assessment, welding quality control and welding inspection, so as to ensure the strength, toughness, corrosion resistance and other properties of the welded joint, prevent the generation and expansion of welding defects, and improve welding efficiency and economy. The continuous development and improvement of high-pressure pipeline welding technology will provide strong technical support for the development of my country's energy, chemical, petroleum, natural gas and other industries.
[0031] Therefore, the pipeline should be grooved during the welding process to ensure that the form, size and gap of the groove meet the standards, and the oxides, oil stains and impurities on the groove should be removed to avoid affecting the quality of the weld. When welding, multi-layer welding should be adopted. The welding slag and spatter should be removed from each layer of the weld. The arc starting point and arc extinguishing point of each layer should be staggered. The weld should be uniform and full without defects such as pores, cracks, and unfused welds. When welding, attention should be paid to the heating method and range to make the joints evenly heated to avoid local overheating or overcooling, which will lead to stress concentration or loss of solder. After welding, tempering treatment should be carried out to reduce the internal stress of the weld and improve the toughness of the weld. Pay attention to safety protection to avoid accidents such as electric shock, fire, and burns. Use dry welding rods to prevent the welding rods from getting damp or rusting. Use windproof baffles to prevent wind from affecting the welding quality.
[0032] Therefore, the angle of the root of the groove needs to be 45 degrees, which is conducive to the operator to perform related operations. Since the spatial volume of the root of the groove is small, maintaining a 45-degree groove will not increase the amount of solder.
[0033] The present embodiment relates to a variable-angle saddle-shaped groove for a header pipe seat. The amount of welding filling is greatly reduced, which saves welding materials and labor costs. In particular, the unit price of high-grade welding materials may exceed 200 yuan / KG, and a φ219×45 joint may require 40KG welding materials and 2.5 days of work. Even according to the technical idea of the utility model, reducing the groove angle can reduce the filling amount to a certain extent, and the reduction is obvious. And the bottom of the saddle-shaped shoulder weld maintains the traditional welding requirements, does not affect the welder's operation, and improves the quality of the weld. The utility model is based on CNC machining technology that is mature in the current market. After confirmation by physical sample processing, whether it is a variable angle along the circumference of the saddle shape or a variable angle along the wall thickness direction, the CNC machine tool can easily realize gradual processing. The product of the utility model will not increase the processing fee due to the complexity of the groove, but can reduce the amount of cutting in the processing process.
[0034] like Figures 2 to 5 As shown, in one embodiment of the utility model, a saddle-shaped groove of a large pipe seat of a header with a variable angle includes a connecting pipe 1 and a connecting seat 2, wherein the connecting seat 2 is provided with a docking surface 21, and the connecting pipe 1 is provided with a connecting side groove 11, wherein the docking surface 21 is connected to the connecting side groove 11 by fusion welding, and the angle between the end of the connecting side groove 11 and the docking surface 21 is 45 degrees.
[0035] The end of the connecting side groove 11 is smoothly transitioned to the connecting side groove 11 near the side wall of the connecting pipe 1. The docking surface 21 is a curved surface. Each center of curvature of the docking surface 21 is set away from the connecting side groove 11. The tangent of the docking surface 21 is 45 degrees to the tangent of one of the connecting side grooves 11. The tangent point of the tangent of the docking surface 21 is defined as the first tangent point, and the tangent point of the tangent of the connecting side groove 11 is defined as the second tangent point. The first tangent point of the docking surface 21 corresponds to the second tangent point of the connecting side groove 11 one by one.
[0036] The present embodiment relates to a variable-angle saddle-shaped groove for a header pipe seat. The angle of the connecting side groove 11 of the connecting pipe 1 is not fixed, and the angle of the parent material (tangent) on both sides of the weld cross section is fixed at 45°, forming a groove that continuously changes along the saddle-shaped intersection line, ensuring that the filling angle at any position of the saddle-shaped curve during the welding process is 45°. The reduction in welding filling volume is large, saving welding materials and labor costs. In particular, the unit price of high-grade welding materials may exceed 200 yuan / KG, and a φ219×45 joint may require 40KG of welding materials and 2.5 days of work. Even according to the technical idea of the present invention, reducing the groove angle can reduce the filling volume to some extent, and the reduction is obvious. And the bottom of the saddle-shaped shoulder weld maintains the traditional welding requirements, does not affect the welder's operation, and improves the weld quality.
[0037] like Figures 3 to 5As shown, in one embodiment of the utility model, a saddle-shaped groove of a large pipe seat of a header with a variable angle includes a connecting pipe 1 and a connecting seat 2, wherein the connecting seat 2 is provided with a docking surface 21, and the connecting pipe 1 is provided with a connecting side groove 11, wherein the docking surface 21 is connected to the connecting side groove 11 by fusion welding, and an angle between the connecting side groove 11 close to the side wall of the connecting pipe 1 and the docking surface 21 is greater than or equal to 30 degrees and less than or equal to 45 degrees.
[0038] There is at least one angle between the end of the connecting side groove 11 and the connecting side groove 11 near the side wall of the connecting pipe 1. The vertex of the angle is defined as a base point. The butt joint 21 is a plane. The number of the base points is greater than or equal to 1, and the straight-line distance between the base point near the inner wall of the connecting pipe 1 and the inner wall of the connecting pipe 1 is 20 mm. The angle at the intersection of the vertical plane passing through the base point and the connecting side groove 11 is 165 degrees.
[0039] The present embodiment relates to a saddle-shaped groove of a large pipe seat of a header with a variable angle. The number of base points in this embodiment is equal to 1. For an extra-thick connection seat 2, the weld section at the shoulder position is designed to be a variable angle. Ensure that there is sufficient welding operation space (45°) at the root of the weld, and reduce the angle (30°) on the outside of the weld to reduce the amount of welding filling, so as to form a double V-shaped groove similar to that in a butt weld. Reducing the amount of welding filling is large, saving welding materials and labor costs. In particular, the unit price of high-grade welding materials may exceed 200 yuan / KG, and a φ219×45 joint may require 40KG of welding materials and 2.5 days of work. Even according to the technical idea of the present invention, reducing the groove angle can reduce the filling amount to some extent, and the reduction is significant. And the bottom of the saddle-shaped shoulder weld maintains the traditional welding requirements, does not affect the welder's operation, and improves the quality of the weld.
[0040] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0041] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.
Claims
1. A variable angle saddle-shaped groove of a header pipe seat, characterized in that: The invention comprises a connecting pipe (1) and a connecting seat (2), wherein the connecting seat (2) is provided with a butt joint surface (21), and the connecting pipe (1) is provided with a connecting side groove (11), wherein the butt joint surface (21) and the connecting side groove (11) are connected by fusion welding, wherein the angle between the end of the connecting side groove (11) and the butt joint surface (21) is 45 degrees, and the angle between the connecting side groove (11) close to the side wall of the connecting pipe (1) and the butt joint surface (21) is greater than or equal to 30 degrees and less than or equal to 45 degrees.
2. The variable angle saddle groove of the header large pipe seat according to claim 1 is characterized in that: The end of the connecting side groove (11) transitions smoothly to the connecting side groove (11) close to the side wall of the connecting pipe (1).
3. The variable angle saddle groove of the header large pipe seat according to claim 2 is characterized in that: The butt joint surface (21) is a curved surface.
4. The variable angle saddle groove of the header large pipe seat according to claim 3 is characterized in that: Each center of curvature of the butt joint surface (21) is arranged away from the connecting side groove (11).
5. The variable angle saddle groove of the header large pipe seat according to claim 4 is characterized in that: The angle between the tangent of the butt joint surface (21) and the tangent of one of the connecting side grooves (11) is 45 degrees; the point of contact of the tangent of the butt joint surface (21) is defined as the first point of contact, and the point of contact of the tangent of the connecting side groove (11) is defined as the second point of contact.
6. The variable angle saddle groove of the header large pipe seat according to claim 5 is characterized in that: The first tangent point of the butt joint surface (21) corresponds one to one with the second tangent point of the connecting side groove (11).
7. The variable angle saddle groove of the header large pipe seat according to claim 1 is characterized in that: There is at least one angle between the end of the connecting side groove (11) and the connecting side groove (11) close to the side wall of the connecting pipe (1); the vertex of the angle is defined as the base point.
8. The variable angle saddle groove of the header large pipe seat according to claim 7 is characterized in that: The butt joint surface (21) is a plane.
9. The variable angle saddle groove of the header large pipe seat according to claim 8 is characterized in that: The number of the base points is greater than or equal to 1, and the straight-line distance between the base points close to the inner wall of the connecting tube (1) and the inner wall of the connecting tube (1) is 20 mm.
10. The variable angle saddle groove of the header large pipe seat according to claim 9 is characterized in that: The angle between the vertical plane passing through the base point and the intersection of the connecting side groove (11) is 165 degrees.