A building construction steel pipe welding apparatus
By designing a vortex tube preheating and heat dissipation system and clamping components, the problems of thermal stress and residual deformation caused by temperature difference in the welding of large-diameter thin-walled steel pipes were solved, thus improving the welding quality and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- XINJIANG ZHONGJIAYANG CONSTR ENG CO LTD
- Filing Date
- 2026-05-09
- Publication Date
- 2026-06-09
AI Technical Summary
When welding large-diameter, thin-walled steel pipes, existing welding equipment causes a large temperature difference between the weld area and the surrounding steel pipe base material due to local high-temperature heating, resulting in thermal stress and residual deformation, which affects the welding strength and airtightness.
A vortex tube preheating and heat dissipation system is adopted. The cold and hot airflow of the vortex tube preheats and dissipates heat to the welded end of the steel pipe, reducing the temperature difference. The steel pipe is fixed by a clamping assembly to prevent thermal stress and residual deformation.
It effectively reduces temperature differences during the welding process, reduces thermal stress and residual deformation, improves welding quality and stability, and ensures the connection strength and airtightness of large-diameter thin-walled pipes.
Smart Images
Figure CN122165114A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding equipment technology, and in particular to a welding equipment for steel pipes used in building construction. Background Technology
[0002] During construction, the laying of steel pipes is an essential measure to facilitate the transportation of water and gas. However, due to the limitations of production sites and transportation conditions, the length of steel pipes is limited. Therefore, during construction, steel pipes need to be welded to make the connection between them more secure and airtight. However, when existing welding equipment is used to weld steel pipes, since the steel pipes used to transport water and gas are mostly large-diameter and thin-walled, the local high-temperature heating during welding causes a large temperature difference between the weld area and the surrounding steel pipe base material. This results in uneven thermal expansion and obstructed cooling and contraction of the steel pipe base material, leading to thermal stress and residual deformation. This also greatly affects the weld strength, airtightness, stability, and reliability between the steel pipes.
[0003] Therefore, there is an urgent need for a welding equipment for large-diameter pipes to solve the defects of the existing welding equipment in actual operation. Summary of the Invention
[0004] This application proposes a steel pipe welding equipment for building construction, which effectively reduces the temperature difference between the weld area and the steel pipe base material, effectively reduces the thermal stress and residual deformation of the steel pipe base material during welding, and has the advantages of better welding quality, higher connection strength and better sealing between steel pipes. It solves the problem that when existing welding equipment is used to weld steel pipes, since the steel pipes transporting water and gas are mostly large-diameter and thin-walled pipe structures, the local high temperature heating phenomenon during welding causes a large temperature difference between the weld area and the surrounding steel pipe base material, resulting in uneven thermal expansion and hindered cooling and contraction of the steel pipe base material, thus causing thermal stress and residual deformation.
[0005] To achieve the above objectives, this application adopts the following technical solution: a steel pipe welding device for building construction, comprising a welding apparatus fixedly sleeved at the ends of steel pipe one and steel pipe two for welding operations. The welding apparatus includes a welding assembly and a clamping assembly. A set of clamping assemblies is provided at each end of the welding assembly, thereby fixing the welding assembly to the weld seam between steel pipe one and steel pipe two through the two sets of clamping assemblies for welding operations. The welding assembly includes a cover fixedly installed on the side end face of the clamping assembly, and the cross-section of the cover is L-shaped, forming a first chamber with a bottom opening between it and the side end face of the clamping assembly. A baffle with a U-shaped cross-section is movably sleeved inside the first chamber. A driving assembly is drively connected to the outer surface of the cover. The output end of the drive component is fixedly connected to the top of the baffle. Under the drive of the drive component, the baffle can move in a circular motion along the weld seam between steel pipe 1 and steel pipe 2. A welding torch for welding steel pipe 1 and steel pipe 2 is fixedly installed inside the baffle. An air inlet tangential nozzle connected to a compression pump is fixedly installed on one side of the outer surface of the drive component. The hot end of the vortex tube is connected to the first chamber. Under the action of the vortex tube, the welding ends of steel pipe 1 and steel pipe 2 can be preheated through the first chamber to effectively reduce the temperature difference between them and the weld seam during the welding operation. At the same time, it can effectively reduce the cooling rate of the weld seam after welding, reduce the thermal stress and residual deformation of the weld seam, and improve the welding quality of the welding device for large-diameter thin pipes. The vortex tube consists of a tangential nozzle, a vortex chamber, a separation orifice plate, hot and cold end pipes, and a control valve. Compressed gas enters the vortex chamber through the tangential nozzle to form a free vortex. The central low-temperature gas flow is discharged through the orifice plate, while the outer high-temperature gas flow is discharged through the valve. The temperature can be controlled by adjusting the valve, thereby separating the compressed gas into two gas flows: a cold gas flow and a hot gas flow.
[0006] Furthermore, the drive assembly has a second chamber inside which the welding torch is enclosed, and the cold end of the vortex tube is connected to the second chamber. A through hole is opened on one side of the outer surface of the drive assembly to connect with the second chamber. In this way, the welding torch can be cooled by the airflow at the cold end of the vortex tube, and the heat is carried away from the second chamber to prevent the welding torch from overheating during long-term operation.
[0007] Furthermore, the baffle is designed as a fan-shaped structure, and its inner diameter is the same as the outer diameter of steel pipe one and steel pipe two. The baffle can effectively block the hot air in the first chamber from having an adverse effect on the weld in the molten state during welding due to axial flow, and prevent the weld in the molten state from being deformed by the wind, which would lead to a deterioration in the welding quality of the large-diameter thin pipe.
[0008] Furthermore, the hot end of the vortex tube is connected to the first chamber in front of the direction of rotation of the welding torch during welding. This allows the hot airflow generated by the hot end of the vortex tube to preheat the surfaces of the steel pipes one and two to be welded at the next position, thereby further reducing the temperature difference between them and the weld area during welding and effectively reducing the heat loss generated by the vortex tube.
[0009] Furthermore, the clamping assembly includes a clamping ring, on one side of which three sets of extrusion blocks arranged in a circular array are movably connected, and the bottom end of the extrusion block extends into the interior of the clamping ring. The interior of the extrusion block is designed with a beveled structure and contacts a wedge block slidably connected to the outer surface of the clamping ring. The side end face of the wedge block is fixedly connected to a positioning ring slidably fitted onto the outer surface of the clamping ring, and the side end face of the positioning ring contacts a locking ring threadedly connected to the other side of the outer surface of the clamping ring. Thus, when installing the welding equipment, the positioning ring can be forced to move inward by rotating the locking ring, and the extrusion block is forced to move inward by the mutual extrusion of the wedge block and the extrusion block until its bottom end makes extrusion contact with the outer surface of steel pipe one or steel pipe two to fix the welding device.
[0010] Furthermore, the bottom end of the extrusion block is provided with a pad made of elastic rubber material in a V-shape. The pad at the bottom end of the extrusion block can effectively reduce the scratch damage or extrusion deformation caused to the outer surface of the steel pipe one or steel pipe two when it comes into contact with it.
[0011] The beneficial effects of this invention are as follows: 1. The steel pipe welding equipment provided in this application, with the setting of the first chamber, under the action of the eddy current tube, can preheat the welding ends of steel pipe one and steel pipe two through the first chamber, so as to effectively reduce the temperature difference between them and the weld during the welding operation. At the same time, it can effectively reduce the cooling rate of the weld after the welding is completed, reduce the thermal stress and residual deformation of the weld, and improve the welding quality of the welding device for large-diameter thin pipes.
[0012] 2. The steel pipe welding equipment for building construction provided in this application, with the setting of the second chamber, under the action of the vortex tube, can dissipate heat on the welding torch through the cold end airflow of the vortex tube, and carry the heat away from the second chamber to prevent the welding torch from overheating during long-term operation, thereby effectively improving the stability and reliability of the welding equipment during operation.
[0013] 3. The steel pipe welding equipment for building construction provided in this application has a clamping component. When installing the welding equipment, the positioning ring can be forced to move inward by rotating the locking ring. Under the mutual compression of the wedge block and the extrusion block, the extrusion block is forced to move inward until its bottom end makes extrusion contact with the outer surface of steel pipe one or steel pipe two to fix the welding device. The operation is simple and convenient. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the welding device of the present invention; Figure 3 For the present invention Figure 2 Enlarged diagram of point A in the diagram; Figure 4 This is a schematic diagram of the structure of the clamping assembly of the present invention; Figure 5 The structure of this invention Figure 1 The front view; Figure 6 The structure of this invention Figure 1 A partial sectional view of the front.
[0015] In the figure: 1-Steel pipe one, 2-Steel pipe two, 3-Welding device, 4-Clamping assembly, 5-Baffle, 6-Baffle plate, 7-Drive assembly, 8-Welding torch, 9-Vortex tube, 10-Clamping ring, 11-Extrusion block, 12-Wedge block, 13-Positioning ring, 14-Locking ring. Detailed Implementation
[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0017] like Figure 1 As shown, a steel pipe welding equipment for building construction includes a welding device 3 that is fixedly sleeved at the ends of steel pipe 1 and steel pipe 2 for welding operations. Figure 2 , Figure 3As shown, the welding device 3 includes a welding assembly and a clamping assembly 4. Each end of the welding assembly is provided with a set of clamping assemblies 4, which allows the welding assembly to be fixed to the weld between steel pipe 1 and steel pipe 2 via the two sets of clamping assemblies 4, thus enabling welding operations on steel pipe 1 and steel pipe 2. Figure 5 , Figure 6 As shown, the welding assembly includes a cover 5 fixedly installed on the side end face of the clamping assembly 4. The cover 5 has an L-shaped cross-section and forms a first chamber with a bottom opening between it and the side end face of the clamping assembly 4. A baffle 6 with a U-shaped cross-section is movably fitted inside the first chamber. A drive assembly 7 is drivenly connected to the outer surface of the cover 5, and the output end of the drive assembly 7 is fixedly connected to the top of the baffle 6. Under the driving action of the drive assembly 7, the baffle 6 can be driven to move circumferentially along the weld seam between steel pipe 1 and steel pipe 2. A... The welding torch 8, used for welding steel pipe 1 and steel pipe 2, has an air inlet tangential nozzle and a vortex tube 9 connected to a compression pump fixedly installed on one side of the outer surface of the drive assembly 7. The hot end of the vortex tube 9 is connected to the first chamber. Under the action of the vortex tube 9, the welding ends of steel pipe 1 and steel pipe 2 can be preheated through the first chamber to effectively reduce the temperature difference between them and the weld during the welding operation. At the same time, it can effectively reduce the cooling rate of the weld after welding, reduce the thermal stress and residual deformation of the weld, and improve the welding quality of the welding device for large-diameter thin pipes. The vortex tube 9 consists of a tangential nozzle, a vortex chamber, a separation orifice plate, hot and cold end tubes, and a control valve. Compressed gas enters the vortex chamber through the tangential nozzle to form a free vortex. The central low-temperature airflow is discharged through the orifice plate, while the outer high-temperature airflow is discharged through the valve. The temperature can be controlled by adjusting the valve, thereby separating the compressed gas into two airflows, cold and hot.
[0018] In this technical solution, the drive assembly 7 has a second chamber inside which the welding torch 8 is enclosed. The cold end of the vortex tube 9 is connected to the second chamber, and a through hole is opened on one side of the outer surface of the drive assembly 7 to connect with the second chamber. In this way, the welding torch 8 can be cooled by the airflow at the cold end of the vortex tube 9, and the heat is carried away from the second chamber to prevent the welding torch 8 from overheating during long-term operation.
[0019] In this technical solution, the baffle 6 is designed as a fan-shaped structure, and its inner diameter is the same as the outer diameter of steel pipe 1 and steel pipe 2. The baffle 6 can effectively block the hot air in the first chamber from having an adverse effect on the weld in the molten state during welding due to axial flow, and prevent the weld in the molten state from being deformed by the wind, which would lead to a deterioration in the welding quality of the large-diameter thin pipe.
[0020] In this technical solution, the hot end of the vortex tube 9 is connected to the first chamber in front of the direction of rotation of the welding torch 8 during welding. This allows the hot airflow generated by the hot end of the vortex tube 9 to preheat the surfaces of the steel pipe 1 and steel pipe 2 to be welded at the next position, thereby further reducing the temperature difference between them and the weld area during welding and effectively reducing the heat loss generated by the vortex tube 9.
[0021] like Figure 1 , Figure 2 as well as Figure 4 As shown, in this technical solution, the clamping assembly 4 includes a clamping ring 10. Three sets of extrusion blocks 11 arranged in a ring array are movably connected to one side of the inside of the clamping ring 10. The bottom end of the extrusion block 11 extends into the inside of the clamping ring 10. The inside of the extrusion block 11 is set with a sloping structure and contacts the wedge block 12 that is slidably connected to the outer surface of the clamping ring 10. The side end face of the wedge block 12 is fixedly connected to the positioning ring 13 that is slidably sleeved on the outer surface of the clamping ring 10. The side end face of the positioning ring 13 contacts the locking ring 14 that is threadedly connected to the other side of the outer surface of the clamping ring 10. Thus, when installing the welding equipment, the positioning ring 13 can be forced to move inward by rotating the locking ring 14. Under the mutual extrusion of the wedge block 12 and the extrusion block 11, the extrusion block 11 is forced to move inward until its bottom end makes extrusion contact with the outer surface of the steel pipe 1 or the steel pipe 2 to fix the welding device 3.
[0022] In this technical solution, the bottom end of the extrusion block 11 is provided with a pad made of elastic rubber material and in a V-shape. The pad at the bottom end of the extrusion block 11 can effectively reduce the scratch damage or extrusion deformation caused to the outer surface of the steel pipe 1 or the steel pipe 2 when it comes into contact with it.
[0023] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A steel pipe welding equipment for building construction, comprising a welding device (3) fixedly sleeved at the ends of steel pipe one (1) and steel pipe two (2), characterized in that: The welding device (3) includes a welding assembly and a clamping assembly (4). A set of clamping assemblies (4) is provided at both ends of the welding assembly. The welding assembly includes a cover (5) fixedly installed on the side end face of the clamping assembly (4). The cross-section of the cover (5) is set as an L-shaped structure and forms a first chamber with a bottom opening between it and the side end face of the clamping assembly (4). A baffle (6) with a U-shaped cross-section is movably sleeved inside the first chamber. A drive assembly (7) is drivenly connected to the outer surface of the cover (5). The output end of the drive assembly (7) is fixedly connected to the top end of the baffle (6). A welding torch (8) is fixedly installed inside the baffle (6). A vortex tube (9) is fixedly installed on one side of the outer surface of the drive assembly (7). The hot end of the vortex tube (9) is connected to the first chamber.
2. The steel pipe welding equipment for building construction according to claim 1, characterized in that, The drive assembly (7) has a second chamber inside which the welding torch (8) is enclosed, and the cold end of the vortex tube (9) is connected to the second chamber. A through hole is provided on one side of the outer surface of the drive assembly (7) to connect with the second chamber.
3. The steel pipe welding equipment for building construction according to claim 2, characterized in that, The baffle (6) is configured as a fan-shaped structure, and its inner diameter is the same as the outer diameter of steel pipe one (1) and steel pipe two (2).
4. The steel pipe welding equipment for building construction according to claim 3, characterized in that, The hot end of the vortex tube (9) is connected to the first chamber in front of the direction of rotation of the welding torch (8) during welding.
5. The steel pipe welding equipment for building construction according to claim 1, characterized in that, The clamping assembly (4) includes a clamping ring (10). Three sets of extrusion blocks (11) arranged in a ring array are movably connected to one side of the inside of the clamping ring (10). The bottom end of the extrusion block (11) extends into the inside of the clamping ring (10). The inside of the extrusion block (11) is set as a slope structure and contacts a wedge block (12) that is slidably connected to the outer surface of the clamping ring (10). The side end face of the wedge block (12) is fixedly connected to a positioning ring (13) that is slidably sleeved on the outer surface of the clamping ring (10). The side end face of the positioning ring (13) contacts a locking ring (14) that is threadedly connected to the other side of the outer surface of the clamping ring (10).
6. The steel pipe welding equipment for building construction according to claim 5, characterized in that, The bottom end of the extrusion block (11) is provided with a pad made of elastic rubber material and in a V-shaped structure.