Wind power tower cylinder girth joint preheating device before welding

Abstract

The utility model discloses wind power tower drum ring seam preheating device before welding, including movable base, movable base upper end surface fixedly arranged with lifting mechanism, the lifting mechanism upper end fixedly arranged with the bearing plate, the bearing plate upper end slidingly connected with the annular support, the annular support inside fixedly arranged with heating unit, the bearing plate upper end surface and annular support between matching be equipped with the drive mechanism for driving annular support reciprocating motion, the utility model discloses through the meshing of reduction motor drive incomplete gear and double rack rotary mechanism, can drive annular support stable reciprocating motion, cooperate annular support inside far infrared ceramic heater or electromagnetic induction heater, can carry out comprehensive, even heating to ring gap area, need not manual frequent adjustment heating position, and the lifting mechanism can adapt to the tower drum ring gap of different height, and the annular support adopts the splicing structure of two half circular support board hinged and bolted, is convenient for setting to the tower drum ring gap place.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine tower welding devices, specifically to a preheating device for circumferential welds of wind turbine towers. Background Technology

[0002] In the field of wind power equipment manufacturing, the wind turbine tower, as a core load-bearing component, directly determines the structural stability and service life of the tower through the quality of its circumferential weld. Wind turbine towers are mostly composed of multiple sections spliced ​​together. During circumferential welds at these joints, because the tower material is mostly high-strength low-alloy steel, rapid temperature fluctuations during welding can easily generate welding stress, leading to defects such as cracks. Therefore, preheating before welding is a crucial step in ensuring the quality of the circumferential weld.

[0003] Preheating before welding requires uniform heating of the circumferential seam area to ensure that the temperature of the circumferential seam and surrounding area reaches the preset process requirements, thereby reducing welding stress and improving the microstructure and properties of the welded joint. However, existing preheating devices for circumferential seams of wind turbine towers mostly adopt a fixed heating method, which requires manual adjustment of the heating position to achieve preheating of the entire circumferential seam area. This operation is cumbersome and makes it difficult to ensure heating uniformity. Utility Model Content

[0004] (I) Technical Issues

[0005] This invention provides a preheating device for circumferential welds of wind turbine towers to solve the problem that existing preheating devices are unable to achieve stable reciprocating motion in the circumferential weld area, resulting in uneven preheating.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a preheating device for circumferential welding of wind turbine towers, including a movable base, a lifting mechanism fixedly provided on the upper surface of the movable base, a bearing plate fixedly provided on the upper end of the lifting mechanism, an annular bracket slidably connected to the upper end of the bearing plate, the annular bracket being composed of two semi-circular bracket plates spliced ​​together, one end of the two semi-circular bracket plates being hinged and the other end being detachably fixed by bolts, a heating unit fixedly provided inside the annular bracket, and a driving mechanism for driving the reciprocating motion of the annular bracket being matched between the upper surface of the bearing plate and the annular bracket; the driving mechanism includes a double rack rotary mechanism fixedly provided at the bottom of the annular bracket, and a reduction motor fixedly provided at the upper end of the bearing plate, an incomplete gear fixedly provided on the drive shaft of the reduction motor, the incomplete gear extending into the interior of the double rack rotary mechanism and meshing with the racks on its upper and lower bottom surfaces.

[0008] Furthermore, the heating unit is a far-infrared ceramic heater or an electromagnetic induction heater.

[0009] Furthermore, the lifting mechanism includes a cavity fixedly disposed on the upper surface of the movable base, an electric push rod fixedly disposed on the bottom surface inside the cavity, a lifting plate fixedly disposed on the piston end of the electric push rod, a column fixedly disposed on the upper end of the lifting plate, and a bearing plate fixedly disposed on the upper end of the column.

[0010] Furthermore, at least one guide rod is fixedly provided inside the cavity, connecting the upper and lower bottom surfaces. The guide rod passes through the lifting plate and slides with the lifting plate.

[0011] Furthermore, two linear guide rails are fixedly provided on the upper end of the bearing plate, and sliders are slidably provided on the linear guide rails, with an annular bracket fixed between the two sliders.

[0012] Furthermore, the movable base includes a base and self-locking casters fixed at the four corners of the bottom of the base, and a handrail is fixedly provided on one side of the base.

[0013] (III) Technical Effects

[0014] Compared with the prior art, the advantages of this utility model are as follows: the incomplete gear driven by the geared motor meshes with the double rack and pinion rotary mechanism, which can drive the ring support to reciprocate stably. With the far-infrared ceramic heater or electromagnetic induction heater inside the ring support, the ring seam area can be heated comprehensively and evenly without the need for frequent manual adjustment of the heating position. The movable base with self-locking universal wheels facilitates the overall movement of the device. The lifting mechanism can adapt to the tower ring seams of different heights. The ring support adopts a splicing structure of two semi-circular support plates hinged and bolted, which is convenient to fit into the tower ring seam. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the preheating device for circumferential weld of wind turbine tower according to this utility model. Figure 1 .

[0016] Figure 2 This is a three-dimensional structural diagram of the preheating device for circumferential weld of wind turbine tower according to this utility model. Figure 2 .

[0017] Figure 3 This is a schematic diagram of the main structure of the preheating device for circumferential weld of wind turbine tower according to this utility model.

[0018] Figure 4 This is a left-side structural schematic diagram of the preheating device for circumferential welding of wind turbine towers according to this utility model.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the preheating device for circumferential weld of wind turbine tower according to this utility model. Figure 1 .

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of the preheating device for circumferential weld of wind turbine tower according to this utility model. Figure 2 .

[0021] As shown in the figure: 1. Movable base; 2. Support plate; 3. Ring bracket; 4. Heating unit; 5. Double rack and pinion rotary mechanism; 6. Gear motor; 7. Incomplete gear; 8. Cavity; 9. Electric push rod; 10. Lifting plate; 11. Column; 12. Guide rod; 13. Linear guide rail; 14. Slider; 101. Base; 102. Self-locking caster wheel; 103. Handrail. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", 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 structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] Combined with appendix Figure 1 To be continued Figure 6 A preheating device for circumferential welding of wind turbine towers includes a movable base 1. A lifting mechanism is fixedly mounted on the upper surface of the movable base 1. A bearing plate 2 is fixedly mounted on the upper end of the lifting mechanism. An annular bracket 3 is slidably connected to the upper end of the bearing plate 2. The annular bracket 3 is composed of two semi-circular bracket plates spliced ​​together. One end of the two semi-circular bracket plates is hinged and the other end is detachably fixed by bolts. A heating unit 4 is fixedly mounted inside the annular bracket 3. A driving mechanism for driving the reciprocating motion of the annular bracket 3 is matched between the upper surface of the bearing plate 2 and the annular bracket 3. The driving mechanism includes a double rack rotary mechanism 5 fixedly mounted at the bottom of the annular bracket 3, and a reduction motor 6 fixedly mounted on the upper end of the bearing plate 2. An incomplete gear 7 is fixedly mounted on the drive shaft of the reduction motor 6. The incomplete gear 7 extends into the interior of the double rack rotary mechanism 5 and meshes with the racks on its upper and lower bottom surfaces. The heating unit 2 is a far-infrared ceramic heater or an electromagnetic induction heater.

[0026] In this embodiment, as a preferred technical solution, the lifting mechanism includes a cavity 8 fixedly disposed on the upper surface of the movable base 1. An electric push rod 9 is fixedly disposed on the bottom surface inside the cavity 8. A lifting plate 10 is fixedly disposed on the piston end of the electric push rod 9. A column 11 is fixedly disposed on the upper end of the lifting plate 10. A bearing plate 2 is fixedly disposed on the upper end of the column 11. At least one guide rod 12 is fixedly disposed inside the cavity 8, connecting the upper and lower bottom surfaces. The guide rod 12 passes through the lifting plate 10 and slides with the lifting plate 10.

[0027] In this embodiment, as a preferred technical solution, two linear guide rails 13 are fixedly provided on the upper end of the bearing plate 2, and sliders 14 are slidably provided on the linear guide rails 13. The annular bracket 3 is fixedly provided between the two sliders 14. The movable base 1 includes a base 101 and self-locking universal wheels 102 fixedly provided at the four corners of the bottom of the base 1. A handrail 103 is fixedly provided on one side of the base 101.

[0028] The working principle of this utility model is as follows:

[0029] 1. Push the handle 103 of the movable base 1, and move the device to the preheating position of the wind turbine tower circumferential seam with the help of the self-locking caster 102 at the bottom of the base 101. Lock the self-locking caster 102 to fix the device and connect to the external power supply.

[0030] 2. First, open the annular support 3, start the electric push rod 9, the piston end of the electric push rod 9 pushes the lifting plate 10 to slide up and down along the guide rod 12, the lifting plate 10 drives the bearing plate 2 to rise and fall synchronously through the column 11 until the semi-circular support plate on the lower side of the annular support 3 is attached to the tower ring seam, then close the electric push rod 9 to complete the height adjustment.

[0031] 3. Then, rotate the upper semi-circular support plate around the hinge end and fit it on the outside of the tower annular seam. Then fix the two semi-circular support plates with bolts so that the heating unit 4 (far-infrared ceramic heater or electromagnetic induction heater) inside the annular support 3 is aligned with the annular seam area.

[0032] 4. Start the reduction motor 6. The drive shaft of the reduction motor 6 drives the incomplete gear 7 to rotate. The incomplete gear 7 extends into the double rack rotary mechanism 5 and alternately meshes with the racks on the upper and lower bottom surfaces of the double rack rotary mechanism 5, thereby driving the annular support 3 to make stable reciprocating motion along the linear guide rail 13. At the same time, the heating unit 4 is turned on. The heating unit 4 releases heat and uniformly heats the annular seam area of ​​the tower with the reciprocating motion of the annular support 3 until the annular seam temperature reaches the preset preheating process requirements.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A preheating device for circumferential welding of wind turbine towers, comprising a movable base (1), a lifting mechanism fixedly mounted on the upper surface of the movable base (1), and a bearing plate (2) fixedly mounted on the upper end of the lifting mechanism, characterized in that: The upper end of the bearing plate (2) is slidably connected to an annular bracket (3). The annular bracket (3) is composed of two semi-circular bracket plates spliced ​​together. One end of the two semi-circular bracket plates is hinged and the other end is fixed by bolts. A heating unit (4) is fixed inside the annular bracket (3). A driving mechanism for driving the reciprocating motion of the annular bracket (3) is matched between the upper end surface of the bearing plate (2) and the annular bracket (3). The driving mechanism includes a double rack rotary mechanism (5) fixedly mounted on the bottom of the ring bracket (3), and a speed reduction motor (6) fixedly mounted on the upper end of the bearing plate (2). An incomplete gear (7) is fixedly mounted on the drive shaft of the speed reduction motor (6). The incomplete gear (7) extends into the double rack rotary mechanism (5) and meshes with the racks on its upper and lower bottom surfaces.

2. The preheating device for circumferential weld of wind turbine tower according to claim 1, characterized in that: The heating unit (4) is a far-infrared ceramic heater or an electromagnetic induction heater.

3. The preheating device for circumferential weld of wind turbine tower according to claim 1, characterized in that: The lifting mechanism includes a cavity (8) fixedly mounted on the upper surface of the movable base (1), an electric push rod (9) fixedly mounted on the bottom surface inside the cavity (8), a lifting plate (10) fixedly mounted on the piston end of the electric push rod (9), a column (11) fixedly mounted on the upper end of the lifting plate (10), and a bearing plate (2) fixedly mounted on the upper end of the column (11).

4. The preheating device for circumferential weld of wind turbine tower according to claim 3, characterized in that: The cavity (8) is connected to the upper and lower bottom surfaces and at least one guide rod (12) is fixedly provided. The guide rod (12) passes through the lifting plate (10) and slides with the lifting plate (10).

5. The preheating device for circumferential weld of wind turbine tower according to claim 1, characterized in that: The upper end of the bearing plate (2) is fixedly provided with two linear guide rails (13), and a slider (14) is slidably provided on the linear guide rails (13). The annular bracket (3) is fixedly provided between the two sliders (14).

6. The preheating device for circumferential weld of wind turbine tower according to claim 1, characterized in that: The movable base (1) includes a base (101) and self-locking casters (102) fixed at the four corners of the bottom of the base (101). A handrail (103) is fixed on one side of the base (101).

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