A pipe welding device

Abstract

The application relates to the technical field of pipe welding, in particular to a pipeline welding device. The pipeline welding device comprises a shell, a clamping mechanism arranged on the shell, a welding mechanism, a channel mechanism and a driving member. The clamping mechanism comprises a first clamping assembly and a second clamping assembly which are detachably connected. The welding mechanism comprises a welding head assembly and the driving member. An installation groove is formed in the shell, the welding head assembly is arranged in the installation groove, and the welding head assembly is located between the first clamping assembly and the second clamping assembly. The driving member is used for driving the welding head assembly to weld a pipe. The channel mechanism comprises a liquid cooling channel and an air path channel arranged on the shell. The liquid cooling channel is connected with the welding head assembly and used for cooling the welding head assembly. The air path channel is connected with the welding head assembly. The driving member is arranged on one side of the shell, and the output shaft axis of the driving member is perpendicular to the plane where the axis of the shell is located.

Description

Technical Field

[0001] This application relates to the field of pipe welding technology, and in particular to a pipe welding apparatus. Background Technology

[0002] Pipeline systems serve as core transmission channels in chemical, shipbuilding, nuclear power, thermal power, marine engineering, and urban pipe networks, with welding being the primary connection method. Traditional pipe welding mainly employs manual tungsten inert gas (TIG) welding, manual electric arc welding (SMAW), and semi-automatic gas metal arc welding (MAG). Manual welding relies heavily on the operator's skills and experience, and weld quality is significantly affected by human factors.

[0003] Patent No. 202421703240.3 discloses a welding device for short straight manifolds of heat exchanger mains pipes. The device includes a limiting mechanism and a welding mechanism, with the limiting mechanism connected to the welding mechanism. The welding mechanism has a through hole and a connection port, which communicates with the through hole, allowing the pipe to be welded to enter the welding mechanism through the connection port and be positioned at the through hole. The limiting mechanism includes an opening / closing clamp switch and an opening / closing clamp. The opening / closing clamp switch is connected to the opening / closing clamp, controlling the opening and closing of the clamp. When the clamp is closed, it covers the connection port and the through hole. This technical solution effectively addresses the welding needs of short straight manifolds in heat exchanger mains pipes, which have small diameters, short lengths, and extremely narrow spaces, providing targeted welding results.

[0004] In the above solution, the motor, gas pipes, and cooling water pipes are all integrated into the rear housing. If the motor fails, the gas pipes and cooling water pipes need to be disassembled, which is complicated and time-consuming to repair. Utility Model Content

[0005] In view of the shortcomings or problems existing in the prior art, this disclosure provides a pipe welding device with a reasonable layout and convenient operation during maintenance.

[0006] The technical solution adopted by this disclosure to solve the above-mentioned technical problem is: a pipe welding device, comprising: case; A clamping mechanism is provided on the housing, and the clamping mechanism includes a first clamping component and a second clamping component that are detachably connected. A welding mechanism includes a welding head assembly and a driving component. The housing has a mounting groove, the welding head assembly is disposed in the mounting groove, and the welding head assembly is located between the first clamping assembly and the second clamping assembly. The driving component is used to drive the welding head assembly to weld the pipe to be welded. The channel mechanism includes a liquid cooling channel and a gas passage disposed on the housing. The liquid cooling channel is connected to the welding head assembly and is used to cool the welding head assembly. The gas passage is connected to the welding head assembly. The driving component is located on one side of the housing, and the output shaft axis of the driving component is perpendicular to the plane containing the axis of the housing.

[0007] In a preferred embodiment, the welding head assembly includes a welding torch tooth ring and a welding needle disposed on the welding torch tooth ring, and the driving component is connected to the welding torch tooth ring via a transmission component.

[0008] In a preferred embodiment, the transmission assembly includes a first gear and two second gears. The output shaft of the drive component is connected to the first gear, and the two second gears mesh with the first gear respectively. The outer peripheral wall of the welding torch gear ring is provided with a toothed section, which meshes with the two second gears simultaneously.

[0009] In a preferred embodiment, the housing includes a first housing and a second housing connected by bolts, a welding torch gear ring is disposed between the first housing and the second housing, the second housing is provided with a through hole for the drive member to pass through, and one end of the drive member passes through the second housing and is connected to the first gear.

[0010] In a preferred embodiment, a mounting base is provided at the bottom of the housing, and the first housing and the second housing are connected to the mounting base by bolts, with one end of the liquid cooling channel passing through the mounting base.

[0011] In a preferred embodiment, a heat-conducting plate is further provided between the first housing and the second housing, one side of the welding torch tooth ring is in contact with the heat-conducting plate, a cooling channel is provided below the heat-conducting plate, and the liquid cooling channel is connected to the cooling channel.

[0012] In a preferred embodiment, the liquid cooling channel includes an inlet channel and an outlet channel. The cooling channel extends laterally and is arranged below the heat-conducting plate. The cooling channel is connected to the inlet channel and the outlet channel respectively. The inlet channel is located near the first end of the cooling channel, and the outlet channel is located near the second end of the cooling channel.

[0013] In a preferred embodiment, the second housing is provided with a first channel and an air intake chamber that are interconnected. The first channel is also connected to an air intake pipe, one end of which passes through the mounting base. The air passage is composed of the air intake pipe, the first channel, and the air intake chamber.

[0014] In a preferred embodiment, the welding torch gear ring is provided with a plurality of air inlets spaced apart along its circumference, and the air inlets are connected to the air inlet chamber.

[0015] In a preferred embodiment, the outer side of the first housing is provided with a first recess, and the first clamping component is provided in the first recess, the first clamping component being provided with a first clamping port for clamping the pipe fitting to be welded; the outer side of the second housing is provided with a second recess, and the second clamping component is provided in the second recess, the second clamping component being provided with a second clamping port for clamping the pipe fitting to be welded.

[0016] Compared with the prior art, the advantages of this application are: the drive component is independently set on one side of the outer shell, which facilitates its disassembly, inspection and maintenance without extensive disassembly of the shell or internal channel mechanism; at the same time, this setting is also conducive to the heat dissipation of the drive component itself, avoiding its operating temperature rise from directly affecting the temperature inside the shell, especially the welding area; placing the drive component on the side of the shell helps to lower the center of gravity of the whole machine, enhances the stability and vibration resistance of the equipment during the welding process, thereby improving the smoothness of operation and welding accuracy. Attached Figure Description

[0017] Figure 1 This is one of the structural schematic diagrams of a pipe welding device according to this application; Figure 2 This is a second structural schematic diagram of a pipe welding device according to this application; Figure 3 This is a schematic diagram of the connection between the welding torch tooth ring and the second housing in this application; Figure 4 This is a schematic diagram of the connection between the transmission component and the welding torch gear ring in this application; Figure 5 This is a schematic diagram of the welding torch gear ring of this application; Figure 6 This is a cross-sectional view of the second housing of this application.

[0018] In the figure: 1. First housing; 2. Drive component; 3. First clamping assembly; 4. Second clamping assembly; 5. Second housing; 6. First clamping block; 7. Second clamping block; 8. First gear; 9. Second gear; 10. Mounting base; 11. Heat-conducting plate; 12. Welding torch gear ring; 13. Toothed section; 14. Air inlet; 15. Liquid inlet channel; 16. Liquid outlet channel; 17. Cooling channel; 18. First channel; 19. Air inlet pipe; 20. Sleeve. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0020] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0021] Please refer to Figure 1 and Figure 2 As shown, this application discloses a pipe welding device, including a housing, a clamping mechanism, a welding mechanism, and a channel mechanism. The clamping mechanism is disposed on the housing and includes a first clamping assembly 3 and a second clamping assembly 4 that are detachably connected. The welding mechanism includes a welding head assembly and a driving member 2. An installation groove is provided on the housing, and the welding head assembly is disposed in the installation groove and located between the first clamping assembly 3 and the second clamping assembly 4. The driving member 2 is used to drive the welding head assembly to weld the pipe fitting to be welded. The channel mechanism includes a liquid cooling channel and a gas passage disposed on the housing. The liquid cooling channel is connected to the welding head assembly and is used to cool the welding head assembly. The gas passage is connected to the welding head assembly and is used to provide protective gas to prevent oxidation or other chemical reactions of the pipe fitting to be welded during the welding process. The driving member 2 is disposed on one side of the housing, and the output shaft axis of the driving member 2 is perpendicular to the plane containing the axis of the housing. This application effectively utilizes the lateral space of the housing, avoiding the axial occupation of the welding operation space by the drive component 2, resulting in a more compact overall structure and reduced axial dimensions. The side-mounted drive component 2, with its vertical power output, helps lower the center of gravity of the welding device, enhancing its stability and vibration resistance during welding, thereby improving operational smoothness and welding accuracy. The drive component 2 is independently located on one side of the housing, facilitating disassembly, inspection, and maintenance without requiring extensive disassembly of the housing or internal channel mechanisms. Simultaneously, this arrangement also facilitates heat dissipation for the drive component 2, preventing its operating temperature rise from directly affecting the temperature inside the housing, especially in the welding area.

[0022] Please refer to the following: Figure 3 and Figure 4As shown, the welding head assembly further includes a welding torch toothed ring 12 and a welding needle disposed on the welding torch toothed ring 12. The welding torch toothed ring 12 is an annular structure with a notch at the top. The welding torch toothed ring 12, together with the first clamping assembly 3 and the second clamping assembly 4, forms a welding chamber. Welding is performed in the welding chamber. During the welding process, a protective gas (inert gas) needs to be introduced into the welding chamber. The welding needle is a tungsten electrode and is disposed on the inner side of the annular structure. The driving component 2 is a motor, which is connected to the welding torch toothed ring 12 through a transmission assembly. The housing comprises a first housing 1 and a second housing 5 connected by bolts. A mounting groove is located inside the second housing 5, and the welding torch gear ring 12 is disposed in the mounting groove. The mounting groove provides space for the welding torch gear ring 12, making the structure more compact after it is installed between the first housing 1 and the second housing 5. Furthermore, the mounting groove provides axial positioning and radial limiting for the welding torch gear ring 12, ensuring high concentricity and stability during transmission, thereby reducing runout and deviation and providing a foundation for high-quality welding. The second housing 5 has a through hole for the drive component 2 to pass through, with one end of the drive component 2 passing through the second housing 5 and connecting to the transmission assembly. A sealing ring can also be installed at the through hole to prevent external contaminants from entering the housing and to avoid leakage of the protective gas inside the housing.

[0023] A first recess is provided on the outer side of the first housing 1, and a first clamping assembly 3 is disposed in the first recess. The first clamping assembly 3 is provided with a first clamping port for clamping the pipe fitting to be welded. Specifically, the first clamping assembly 3 includes a first connecting block and a second connecting block. The first connecting block is disposed above the second connecting block, and the first connecting block and the second connecting block are respectively connected to the first housing 1 by bolts. The first connecting block has a first arc-shaped notch on the side facing the second connecting block, and the second connecting block has a second arc-shaped notch on the side facing the first connecting block. After the first connecting block and the second connecting block are respectively connected to the first housing 1, the first arc-shaped notch and the second arc-shaped notch form a first circular hole. The first clamping block 6 is disposed in the first circular hole, and the first clamping block 6 is provided with a first clamping port for clamping the pipe fitting to be welded. The modular design makes the installation, replacement, or cleaning of the first clamping block 6 simple and quick.

[0024] The outer side of the second housing 5 is provided with a second recess, and the second clamping assembly 4 is provided in the second recess. The second clamping assembly 4 is provided with a second clamping port for clamping the pipe fitting to be welded. Specifically, the second clamping assembly 4 includes a third connecting block and a fourth connecting block. The third connecting block is located above the fourth connecting block, and the third connecting block and the fourth connecting block are respectively connected to the second housing 5 by bolts. The third connecting block has a third arc-shaped notch on the side facing the fourth connecting block, and the fourth connecting block has a fourth arc-shaped notch on the side facing the third connecting block. After the third connecting block and the fourth connecting block are respectively connected to the second housing 5, the third arc-shaped notch and the fourth arc-shaped notch form a second circular hole. The second clamping block 7 is provided in the second circular hole, and the second clamping block 7 is provided with a second clamping port for clamping the pipe fitting to be welded. The welding torch tooth ring 12 is located between the first clamping block 6 and the second clamping block 7. It is understandable that the first clamping port and the second clamping port are concentrically set to ensure the concentricity of the two pipe fittings to be welded, thereby ensuring the welding quality.

[0025] It should be noted that both the first clamping block 6 and the second clamping block 7 have a predetermined axial thickness, so that when the pipe fittings to be welded (part 1 and part 2) are inserted into the first clamping port and the second clamping port respectively for welding, the first clamping block 6 can completely cover the end of the pipe fitting to be welded into the welding chamber, and the second clamping block 7 can completely cover the end of the pipe fitting to be welded into the welding chamber. By completely covering the end of the pipe fittings in the welding chamber formed by the clamping blocks, the entry of external air is effectively restricted, creating a good airtight environment for welding, significantly reducing weld oxidation, and ensuring weld quality. In addition, the thicker clamping blocks provide a larger contact area and gripping force by deeply covering the end of the pipe fittings, significantly enhancing the overall rigidity of the clamping assembly, effectively preventing vibration and relative displacement that may occur during welding, and ensuring uniform and reliable weld formation. Preferably, both the first clamping block 6 and the second clamping block 7 are made of aluminum alloy. Aluminum alloy has low density and high specific strength, which can significantly reduce the weight of the components while ensuring that the clamping blocks have sufficient structural strength and rigidity, thus helping to reduce the overall weight of the device. In addition, as a non-ferromagnetic material, it can avoid the arc magnetic blow phenomenon that may be caused by the use of steel materials when welding magnetically sensitive materials (such as stainless steel), thus ensuring the stability of the welding arc and the welding quality.

[0026] In one embodiment of this application, the transmission assembly includes a first gear 8 and two second gears 9. The output shaft of the drive unit 2 is connected to the first gear 8, and the two second gears 9 mesh with the first gear 8 respectively. The outer peripheral wall of the welding torch gear ring 12 is provided with toothed sections 13, which mesh with the two second gears 9 simultaneously. The drive unit 2 drives the transmission assembly to move, thereby driving the welding torch gear ring 12 to move. The welding needle is located on the welding torch gear ring 12 and moves with it, thereby welding the pipe to be welded. The transmission assembly is mounted on the second housing 5. To ensure the stability of the transmission assembly installation, the second housing 5 is provided with a mounting part, and the transmission assembly is located in the mounting part. The mounting part provides precise positioning and stable support for the first gear 8 and the second gear 9, effectively suppressing the radial runout and axial movement of the gears during the transmission process, ensuring the smoothness and accuracy of the meshing transmission, thereby transmitting the rotational motion of the motor to the welding torch gear ring 12 more accurately, and ensuring the trajectory accuracy of the welding head.

[0027] A mounting base 10 is provided at the bottom of the housing. The first housing 1 and the second housing 5 are connected to the mounting base 10 by bolts. One end of the liquid cooling channel passes through the mounting base 10. The mounting base 10 can limit the liquid cooling channel and make the liquid cooling channel more secure. A sleeve 20 is provided on the outside of the connection between the housing and the mounting base 10.

[0028] Please refer to Figure 3 and Figure 5As shown, a heat-conducting plate 11 is further provided between the first housing 1 and the second housing 5. One side of the welding torch gear ring 12 is in contact with the heat-conducting plate 11, and a cooling channel 17 is provided below the heat-conducting plate 11. The liquid cooling channel is connected to the cooling channel 17. The heat-conducting plate 11 is directly in contact with the welding torch gear ring 12, and the heat-conducting plate 11 can quickly absorb and conduct a large amount of heat generated when the welding torch gear ring 12 is working, and the heat is carried away in time through the cooling channel 17, thereby improving the heat dissipation efficiency. Specifically, the liquid cooling channel includes an inlet channel 15 and an outlet channel 16. Both the inlet channel 15 and the outlet channel 16 pass through the mounting base 10 and extend longitudinally. The cooling channel 17 extends laterally and is arranged below the heat-conducting plate 11. The cooling channel 17 is connected to the inlet channel 15 and the outlet channel 16 respectively. The cooling channel 17 is arranged laterally below the heat-conducting plate 11, which makes the structure compact and the layout reasonable, without occupying additional space. The inlet channel 15 is positioned near the first end of the cooling channel 17, and the outlet channel 16 is positioned near the second end of the cooling channel 17. The cooling medium flows in from the inlet channel 15, flows through the entire length of the cooling channel 17, and then flows out from the outlet channel 16, forming a unidirectional circulation path. This arrangement ensures that the cooling medium (water) and the heat-conducting plate 11 have a certain heat exchange contact area and heat exchange time, thereby effectively dissipating heat from the welding torch tooth ring 12. Timely heat dissipation from the welding torch tooth ring 12 can effectively reduce thermal stress and thermal deformation caused by excessive temperature difference, and improve the working accuracy and reliability of the welding device.

[0029] Please refer to Figure 6 As shown, further, the second housing 5 is provided with a first channel 18 and an air inlet chamber that are interconnected. The first channel 18 is also connected to an air inlet pipe 19, one end of which passes through the mounting base 10. The air passage is formed by the air inlet pipe 19, the first channel 18, and the air inlet chamber. Integrating the first channel 18 and the air inlet chamber into the second housing 5 avoids complex external piping connections and effectively saves space. In addition, directly integrating the first channel 18 and the air inlet chamber into the interior of the second housing 5, together with the air inlet pipe 19, forms a built-in air passage, avoiding complex external piping, reducing the risk of leakage, and improving the sealing reliability and structural compactness of the air passage. The welding torch toothed ring 12 is provided with a plurality of air inlet holes 14 evenly spaced along its circumference. Each air inlet hole 14 extends radially along the welding torch toothed ring 12 and is connected to the air inlet chamber and the welding chamber. The gas source (a rare gas, such as argon or helium) enters through the inlet pipe 19, passes through the first channel 18 and the inlet chamber, enters the inlet hole 14, and finally enters the welding chamber. The gas source enters the welding chamber through multiple radial inlet holes 14 evenly distributed around the welding torch tooth ring 12, which can form a stable and uniform protective gas atmosphere around the welding area, effectively isolating air, preventing weld oxidation, and improving welding quality.

[0030] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A pipe welding apparatus, characterized in that, include: case; A clamping mechanism is provided on the housing, and the clamping mechanism includes a first clamping component (3) and a second clamping component (4) that are detachably connected. The welding mechanism includes a welding head assembly and a drive component (2). The housing has an installation groove, the welding head assembly is located in the installation groove, and the welding head assembly is located between the first clamping assembly (3) and the second clamping assembly (4). The drive component (2) is used to drive the welding head assembly to weld the pipe to be welded. The channel mechanism includes a liquid cooling channel and a gas passage disposed on the housing. The liquid cooling channel is connected to the welding head assembly and is used to cool the welding head assembly. The gas passage is connected to the welding head assembly. The driving member (2) is located on one side of the housing, and the output shaft axis of the driving member (2) is perpendicular to the plane containing the axis of the housing.

2. The pipe welding apparatus according to claim 1, characterized in that, The welding head assembly includes a welding torch tooth ring (12) and a welding needle disposed on the welding torch tooth ring (12). The driving component (2) is connected to the welding torch tooth ring (12) via a transmission component.

3. The pipe welding apparatus according to claim 2, characterized in that, The transmission assembly includes a first gear (8) and two second gears (9). The output shaft of the drive unit (2) is connected to the first gear (8). The two second gears (9) mesh with the first gear (8) respectively. The outer peripheral wall of the welding torch gear ring (12) is provided with a toothed section (13), which meshes with the two second gears (9) simultaneously.

4. The pipe welding apparatus according to claim 3, characterized in that, The housing includes a first housing (1) and a second housing (5) connected by bolts. A welding torch gear ring (12) is located between the first housing (1) and the second housing (5). The second housing (5) has a through hole for the drive member (2) to pass through. One end of the drive member (2) passes through the second housing (5) and is connected to the first gear (8).

5. The pipe welding apparatus according to claim 4, characterized in that, A mounting base (10) is provided at the bottom of the housing. The first housing (1) and the second housing (5) are connected to the mounting base (10) by bolts. One end of the liquid cooling channel passes through the mounting base (10).

6. The pipe welding apparatus according to claim 4, characterized in that, A heat-conducting plate (11) is also provided between the first housing (1) and the second housing (5). One side of the welding torch tooth ring (12) is in contact with the heat-conducting plate (11). A cooling channel (17) is provided below the heat-conducting plate (11). The liquid cooling channel is connected to the cooling channel (17).

7. The pipe welding apparatus according to claim 6, characterized in that, The liquid cooling channel includes an inlet channel (15) and an outlet channel (16). The cooling channel (17) extends laterally and is arranged below the heat-conducting plate (11). The cooling channel (17) is connected to the inlet channel (15) and the outlet channel (16) respectively. The inlet channel (15) is located near the first end of the cooling channel (17), and the outlet channel (16) is located near the second end of the cooling channel (17).

8. The pipe welding apparatus according to claim 5, characterized in that, The second housing (5) is provided with a first channel (18) and an air inlet chamber that are interconnected. The first channel (18) is also connected to an air inlet pipe (19). One end of the air inlet pipe (19) passes through the mounting base (10). The air passage is composed of the air inlet pipe (19), the first channel (18) and the air inlet chamber.

9. The pipe welding apparatus according to claim 8, characterized in that, The welding torch tooth ring (12) is provided with a number of air inlets (14) spaced apart along its circumference, and the air inlets (14) are connected to the air inlet chamber.

10. The pipe welding apparatus according to claim 1, characterized in that, The outer side of the first housing (1) is provided with a first recess, and the first clamping component (3) is provided in the first recess. The first clamping component (3) is provided with a first clamping port for clamping the pipe to be welded. The outer side of the second housing (5) is provided with a second recess, and the second clamping component (4) is provided in the second recess. The second clamping component (4) is provided with a second clamping port for clamping the pipe to be welded.

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