Furnace tube welding device

Abstract

The embodiment of the invention provides a furnace tube welding device. The furnace tube welding device comprises a first movable base, a second movable base connected to the first movable base and a welding assembly fixedly connected with the second movable base. The first moving base comprises a first guide part and a first sliding table which is arranged on the first guide part in a sliding manner, and the second moving base comprises a second guide part and a second sliding table which is arranged on the second guide part in a sliding manner; the first sliding table is connected to the second sliding table, and the welding assembly is fixedly connected to the second sliding table and used for welding the furnace tube. When the first sliding table moves, the welding assembly can be driven to move in the axial direction of the furnace tube, and when the second sliding table moves, the welding assembly can be driven to move in the radial direction of the furnace tube. Through the arrangement of the first movable base, the second movable base and the welding assembly, the requirement for a butt joint gap can be greatly lowered, the defects of weld penetration, incomplete weld penetration and the like are avoided, and the problem that the arc length of an electric arc is too long or too short due to the fact that radial run-out of the weld joint position is too large can also be avoided.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the field of welding technology, and particularly relate to a furnace tube welding device. Background Art

[0002] The water-cooled wall is composed of multiple vertically arranged water-cooled tubes, typically made of steel. Water flows within the tubes, absorbing heat from the furnace and converting it into steam. The water-cooled wall is the primary evaporative heating surface of a power plant boiler. Arranged around the boiler furnace, its primary function is to absorb radiant heat from the furnace flame, heating the water within the wall to produce steam, and secondly, protecting the boiler walls. Due to long-term exposure to high-temperature radiation, high-velocity flue gas scouring, and other factors, pipe bursts can sometimes occur, necessitating welding repairs. Pipes undergoing repair can deform to varying degrees due to external forces such as explosions, uneven heating, and disassembly, making pipe repair and welding significantly more difficult.

[0003] Due to the deformation of the pipe to be repaired, the pipe repair process is limited by the construction environment and operating space. The assembly relationship between the pipes cannot be fully guaranteed as in the new manufacturing process, which increases the butt gap between the pipes and the radial runout of the weld position. Continuing to use the welding technology and equipment in the new manufacturing process is likely to cause defects such as incomplete welding, asymmetric welds, burn-through, and depressions. Summary of the Invention

[0004] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a furnace tube welding device.

[0005] An embodiment of the present disclosure provides a furnace tube welding device, comprising a first movable base, a second movable base connected to the first movable base, and a welding assembly fixedly connected to the second movable base;

[0006] The first movable base includes a first guide portion and a first slide slidably disposed on the first guide portion, and the second movable base includes a second guide portion and a second slide slidably disposed on the second guide portion; wherein,

[0007] The first slide is connected to the second slide, and the welding assembly is fixed to the second slide for welding the furnace tube; when the first slide moves, it can drive the welding assembly to move along the axial direction of the furnace tube, and when the second slide moves, it can drive the welding assembly to move along the radial direction of the furnace tube.

[0008] Optionally, the first movable base and the second movable base are arranged perpendicular to each other, the first slide and the second slide slide along the length direction of the first movable base and the second movable base respectively, and the sliding tracks of the first slide and the second slide are perpendicular to each other.

[0009] Optionally, the second slide is fixed to the first slide in the length direction of the first movable base, and the second slide is slidably connected to the first slide in the width direction of the first movable base.

[0010] Optionally, the first movable base further comprises a first base body provided with a first groove, and the first guide portion is arranged in the first groove along the length direction of the first base body;

[0011] The second movable base further includes a second base body provided with a second groove, and the second guide portion is arranged in the second groove along the length direction of the second base body.

[0012] Optionally, the first guide portion and the second guide portion are both screw drive members, and the first base body and the second base body are respectively provided with drive motors for driving the corresponding screw drive members to respectively drive the first slide and the second slide to slide.

[0013] Optionally, the welding assembly includes a connecting piece, a welding gun and a measuring piece;

[0014] The first end of the connecting member is fixed on the second slide, and the second end of the connecting member is installed with the welding gun and the measuring member; the welding gun is used to weld the furnace tube, and the measuring member is used to measure the radial height and butt clearance of the furnace tube.

[0015] Optionally, the driving motor is driven by a rotary encoder, and the signal of the rotary encoder is converted from the measurement data of the measuring component through calculation by a programmable logic controller.

[0016] Optionally, the direction of the welding gun tip is in the same direction as the radial direction of the furnace tube, and the axial position of the arc of the welding gun is parallel to the installation axial position of the measuring piece.

[0017] Optionally, the connecting member includes a connecting portion and a fixing portion; the connecting portion is fixed on the second slide at a first preset angle, the fixing portion is fixed on the connecting portion at a second preset angle, and the welding gun and the measuring member are fixedly mounted on the fixing portion.

[0018] Optionally, the driving motor is a servo motor, and the measuring element is a laser position measurement sensor.

[0019] The furnace tube welding device of the embodiment of the present disclosure can greatly reduce the requirements for the butt gap through the provision of the first movable base, the second movable base and the welding assembly, thereby avoiding defects such as welding through and incomplete welding, and can also avoid the problem of the arc length being too long or too short caused by excessive radial runout of the weld position. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic structural diagram of a furnace tube welding device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] like Figure 1 As shown, a furnace tube welding device 100 includes a first movable base 110, a second movable base 120 connected to the first movable base 110, and a welding assembly 130 fixedly connected to the second movable base 120. The first movable base 110 includes a first guide portion 111 and a first slide 112 slidably disposed on the first guide portion 111. The second movable base 120 includes a second guide portion 121 and a second slide 122 slidably disposed on the second guide portion 121. The first slide 112 is connected to the second slide 122, and the welding assembly 130 is fixedly connected to the second slide 122 for welding the furnace tube. When the first slide 112 moves, it drives the welding assembly 130 to move axially along the furnace tube. When the second slide 122 moves, it drives the welding assembly 130 to move radially along the furnace tube.

[0023] Specifically, if Figure 1 As shown, the first slide 112 can slide along the first guide portion 111. When the first slide 112 slides along the first guide portion 111, it drives the second slide 122 to move together, thereby driving the welding assembly 130 to move axially along the furnace tube, realizing the axial swing function of the welding assembly 130 along the furnace tube. The second slide 122 can slide along the second guide portion 121. When the second slide 122 slides along the second guide portion 121, it also slides along the first slide 112. The second slide 122 drives the welding assembly 130 to move radially along the furnace tube, realizing the radial adjustment function of the welding assembly 130 along the furnace tube. The first slide 112 and the second slide 122 cooperate to realize the tracking function of the weld trajectory.

[0024] The furnace tube welding device of the embodiment of the present disclosure can significantly reduce the requirements for the butt gap, avoid defects such as welding through and incomplete welding, and also avoid the problem of the arc length being too long or too short caused by excessive radial runout of the weld position.

[0025] For example, Figure 1As shown, the first movable base 110 and the second movable base 120 are arranged perpendicular to each other, and the first slide 112 and the second slide 122 slide along the length direction of the first movable base 110 and the second movable base 120 respectively, and the sliding tracks of the first slide 112 and the second slide 122 are perpendicular to each other. In addition, the second slide 122 is fixed to the first slide 112 in the length direction of the first movable base 110, and is slidably connected to the first slide 112 in the width direction of the first movable base 110.

[0026] Specifically, the first movable base 110 and the second movable base 120 are arranged perpendicular to each other, and the sliding trajectory of the first slide 112 and the sliding trajectory of the second slide 122 are arranged perpendicular to each other. Furthermore, when the first slide 112 slides along the length of the first movable base 110, it drives the second slide 122 with it. When the second slide 122 slides along the length of the second movable base 120, it also slides along the first slide 112. This arrangement allows the position of the welding assembly 130 relative to the furnace tube to be adjusted, ensuring the accuracy of the welding position and achieving the function of tracking the weld trajectory.

[0027] For example, Figure 1 As shown, the first movable base 111 further includes a first base body 114 having a first groove 113, and the first guide portion 111 is disposed in the first groove 113 along the length direction of the first base body 114. The second movable base 120 further includes a second base body 124 having a second groove 123, and the second guide portion 121 is disposed in the second groove 123 along the length direction of the second base body 124.

[0028] Specifically, if Figure 1 As shown, the first base body 114 is provided with a first groove 113, and the first guide portion 111 is arranged in the first groove 113 along the length direction of the first base body 114. The first guide portion 111 can be configured as a screw drive member, which is driven by a drive motor 140 provided on the first base body 114, thereby driving the first slide 112 to slide.

[0029] The second base body 124 is provided with a second groove 123, and the second guide portion 121 is disposed in the second groove 123 along the length direction of the second base body 124. The second guide portion 121 can be configured as a screw drive member, which is driven by a drive motor 140 disposed on the second base body 124, thereby driving the second slide 122 to slide.

[0030] For example, Figure 1As shown, the welding assembly 130 includes a connector 131, a welding gun 132, and a measuring piece 133. The first end of the connector 131 is fixed to the second slide 122, and the welding gun 132 and the measuring piece 133 are mounted on the second end of the connector 131. The welding gun 132 is used to weld the furnace tube, and the measuring piece 133 is used to measure the radial height and butt clearance of the furnace tube.

[0031] Specifically, if Figure 1 As shown, the connecting member 131 is fixed to the second slide 122 and moves with the second slide 122. The welding gun 132 and the measuring member 133 are installed on the connecting member 131 at intervals. The direction of the welding gun 132 is in the same direction as the radial direction of the furnace tube, and the axial position of the arc of the welding gun 132 is parallel to the installation axial position of the measuring member 133. By setting the first movable base 110 and the second movable base 120 in conjunction with the welding assembly 130, the arc height can be changed in real time according to the radial runout of the weld, and the problem of excessive butt gap can also be solved.

[0032] Furthermore, the driving motor 140 may be configured as a servo motor, and the measuring element 133 may be configured as a laser position measurement sensor.

[0033] During the specific welding process, the furnace tube welding device of the disclosed embodiments can firstly plan the welding path in advance based on data from the laser position measurement sensor. Secondly, it can perform oscillating welding, significantly reducing the requirement for the butt gap and avoiding the problem of weld-through or incomplete welds. Finally, the automatic arc height adjustment can prevent the arc length from being too long or too short due to excessive radial runout of the weld position, making it possible to weld deformed furnace tubes.

[0034] For example, Figure 1 As shown, the driving motor 140 is driven by a rotary encoder, and the signal of the rotary encoder is converted by calculating the measurement data of the measuring component 133 through a programmable logic controller.

[0035] Specifically, the laser position measurement sensor measures the radial height and butt clearance of the furnace tube in real time and transmits the data to the PLC (programmable logic controller). The PLC calculates the appropriate slide movement instructions based on this data, controls the servo motor through the rotary encoder, and accurately adjusts the welding gun position.

[0036] For example, Figure 1As shown, the connecting member 131 includes a connecting portion 1311 and a fixing portion 1312. The connecting portion 1311 is fixed to the second slide 122 at a first preset angle, and the fixing portion 1312 is fixed to the connecting portion 1311 at a second preset angle. The welding gun 132 and the measuring member 133 are fixedly mounted on the fixing portion 1312. This arrangement allows the welding gun and measuring member to be better aligned with the furnace tube for welding and measurement, facilitating the operation of the furnace tube welding device.

[0037] The furnace tube welding device of the embodiment of the present disclosure has a simple and reliable structure and can be operated in a narrow space, further facilitating the welding of water-cooling tubes in power station boilers.

[0038] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present disclosure, and the present disclosure is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present disclosure, and such modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A furnace tube welding device, characterized in that: The furnace tube welding device includes a first movable base, a second movable base connected to the first movable base, and a welding assembly fixedly connected to the second movable base; The first movable base includes a first guide portion and a first slide slidably disposed on the first guide portion, and the second movable base includes a second guide portion and a second slide slidably disposed on the second guide portion; wherein, The first slide is connected to the second slide, and the welding assembly is fixed to the second slide for welding the furnace tube; when the first slide moves, it can drive the welding assembly to move along the axial direction of the furnace tube, and when the second slide moves, it can drive the welding assembly to move along the radial direction of the furnace tube.

2. The furnace tube welding device according to claim 1, characterized in that: The first movable base and the second movable base are arranged perpendicular to each other, the first slide and the second slide slide along the length direction of the first movable base and the second movable base respectively, and the sliding tracks of the first slide and the second slide are perpendicular to each other.

3. The furnace tube welding device according to claim 2, characterized in that: The second slide is fixed to the first slide in the length direction of the first movable base, and the second slide is slidably connected to the first slide in the width direction of the first movable base.

4. The furnace tube welding device according to claim 1, characterized in that: The first movable base further comprises a first base body provided with a first groove, and the first guide portion is arranged in the first groove along the length direction of the first base body; The second movable base further includes a second base body provided with a second groove, and the second guide portion is arranged in the second groove along the length direction of the second base body.

5. The furnace tube welding device according to claim 4, characterized in that: The first guide portion and the second guide portion are both screw drive components. The first base body and the second base body are respectively provided with drive motors for driving the corresponding screw drive components to respectively drive the first slide and the second slide to slide.

6. The furnace tube welding device according to claim 5, characterized in that: The welding assembly includes a connecting piece, a welding gun and a measuring piece; The first end of the connecting member is fixed on the second slide, and the second end of the connecting member is installed with the welding gun and the measuring member; the welding gun is used to weld the furnace tube, and the measuring member is used to measure the radial height and butt clearance of the furnace tube.

7. The furnace tube welding device according to claim 6, characterized in that: The driving motor is driven by a rotary encoder, and the signal of the rotary encoder is converted by calculating the measurement data of the measuring component through a programmable logic controller.

8. The furnace tube welding device according to claim 6, characterized in that: The direction of the welding gun head is the same as the radial direction of the furnace tube, and the axial position of the arc of the welding gun is parallel to the installation axial position of the measuring piece.

9. The furnace tube welding device according to claim 6, characterized in that: The connecting member includes a connecting portion and a fixing portion; the connecting portion is fixed on the second slide at a first preset angle, the fixing portion is fixed on the connecting portion at a second preset angle, and the welding gun and the measuring member are fixedly mounted on the fixing portion.

10. The furnace tube welding device according to claim 6, characterized in that: The driving motor is a servo motor, and the measuring element is a laser position measuring sensor.

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