Pre-welding preheating device for girth of wind power tower

Abstract

The utility model relates to the field of wind power tower tube welding, and discloses a wind power tower tube circular seam pre-welding preheating device which comprises a lifting base and two sets of preheating units arranged on the lifting base side by side. The preheating unit comprises an obliquely arranged arc-shaped blind pipe, a plurality of nozzles uniformly distributed on the arc-shaped blind pipe and an adjustable bracket arranged at the bottom of the arc-shaped blind pipe, and the arc-shaped blind pipe is communicated with a gas pipeline with a valve through a joint; the adjustable support comprises a fixed stand column hinged to the low end of the arc-shaped blind pipe and an adjustable stand column hinged to the high end of the arc-shaped blind pipe, and the fixed stand column and the adjustable stand column are both welded to the lifting base. The adjustable stand column is used for adjusting the dip angle of the arc-shaped blind pipe, the lifting base is used for adjusting the height of the arc-shaped blind pipe to achieve pre-welding preheating adaptive to tower barrels of different specifications, the problem that the angle between spray heads changes is solved, and it is guaranteed that the tower barrels are heated evenly; meanwhile, the arc-shaped blind pipe has the advantages of being simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the field of wind power tower welding, in particular to a preheating device before the circumferential seam welding of a wind power tower. Background Art

[0002] In the production process of wind turbine towers, welding is the most critical process. The quality of tower welding is the guarantee of stable operation of wind turbines. To ensure the quality of welding, preheating before welding is an important means of welding quality. At present, the preheating of towers before welding mainly adopts continuous baking preheating by multiple people holding torches. The disadvantages of this preheating method are that it takes up more manpower, the preheating is insufficient and uneven, especially the preheating of the annular seam is particularly prominent, and it is easy to cause welding quality problems.

[0003] The prior art provides a welding preheating device, such as: the Chinese patent with application date of 2022-07-21 and application number CN202210863340.1 discloses a tower ring seam welding preheating device, which is fixed at the lower side of the tower. By rotating the tower, the steel plates on both sides of the ring seam can be evenly preheated; the tightness of the pull wire can be adjusted by rotating the screw, thereby adjusting the cantilever curvature, and achieving perfect fit with tower side walls of various specifications. However, this welding preheating device has the following defects:

[0004] 1. The nozzle is fixedly connected to the fixed sleeve wall and the movable escape. After the cantilever curvature is adjusted, although it can be used with towers of various specifications, the angles between the nozzles are offset, and there may be a problem of flame crossover, which will cause uneven heating of the tower;

[0005] 2. The cantilever has a complex structure, is difficult to manufacture, and has a high manufacturing cost;

[0006] 3. Two welding preheating devices need to be placed side by side, the spacing needs to be adjusted manually, and the position needs to be kept unchanged after adjustment, which makes the operation difficult;

[0007] 4. Manual hand-held igniter is required for ignition operation, which poses a risk of burns.

[0008] Based on this, the present application provides a wind turbine tower girth welding preheating device which has a more reasonable structural design and can be adjusted to be suitable for towers of different specifications. Utility Model Content

[0009] The utility model aims to solve the above problems existing in the prior art. To this end, the utility model provides a wind power tower girth seam preheating device with a more reasonable structural design and adjustable so that it is suitable for towers of different specifications.

[0010] The technical solution adopted by the utility model to solve its technical problems is:

[0011] Provided is a preheating device before the girth weld of a wind power tower, comprising a lifting base and two groups of preheating units arranged in parallel on the lifting base; the preheating unit comprises an inclined arc-shaped blind pipe, a plurality of nozzles evenly distributed on the arc-shaped blind pipe, and an adjustable bracket arranged at the bottom of the arc-shaped blind pipe, the arc-shaped blind pipe is connected to a gas pipeline with a valve through a joint; the adjustable bracket comprises a fixed column hinged to the lower end of the arc-shaped blind pipe and an adjustable column hinged to the upper end of the arc-shaped blind pipe, and the fixed column and the adjustable column are both welded to the lifting base.

[0012] Preferably, the lifting base adopts a scissor-type hydraulic lifting platform vehicle.

[0013] Preferably, the adjustable column includes a first fixing sleeve welded on the lifting base, a second fixing sleeve hinged on the arc-shaped blind tube, and a double-headed screw with both ends threadedly connected to the first fixing sleeve and the second fixing sleeve respectively, and the threads at both ends of the double-headed screw have opposite rotation directions.

[0014] Preferably, a hand wheel is fixedly mounted on the bare rod section of the double-head screw.

[0015] Preferably, the nozzle is arranged perpendicular to the tangent direction of the arc-shaped blind pipe.

[0016] In a preferred embodiment, it also includes a high-voltage electronic ignition device, wherein an ignition needle of the high-voltage electronic ignition device is arranged on the nozzle near the middle of the arc-shaped blind tube.

[0017] Preferably, the ignition switch of the high-voltage electronic ignition device is arranged on the push handle of the lifting base.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model can adjust the inclination of the arc-shaped blind pipe through the adjustable column and adjust the height of the arc-shaped blind pipe with the lifting base to achieve preheating before welding of towers of different specifications, without the problem of angle changes between nozzles, ensuring that the tower is heated evenly; at the same time, the arc-shaped blind pipe has the advantages of simple structure and low production cost;

[0020] 2. Two sets of preheating units are set on the lifting base to preheat the welds of the two towers to be welded. The two sets of preheating units are relatively fixed (the spacing is set according to the preheating requirements), and there will be no offset problem, ensuring the preheating effect;

[0021] 3. Equipped with a high-voltage electronic ignition device, there is no need for manual hand-held ignition to perform ignition operations, avoiding the risk of burns. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0023] Figure 1 This is a diagram showing the use status of the preheating device before the circumferential seam welding of a wind power tower provided by the utility model;

[0024] Figure 2 yes Figure 1 The left side view of the preheating device before the girth welding of the wind turbine tower is provided.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1—lifting base, 2—arc blind pipe, 3—sprinkler, 4—adjustable bracket, 4.1—fixed column, 4.2—adjustable column, 4.2.1—first fixed sleeve, 4.2.2—second fixed sleeve, 4.2.3—double-headed screw, 4.2.4—hand wheel, 5—gas pipeline, 6—ignition device, 6.1—ignition needle, 6.2—ignition switch. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific position, be constructed and operate in a specific position, and therefore should not be understood as limiting the present invention;

[0030] In addition, the descriptions involving the terms "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. The terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Embodiment 1

[0033] This embodiment provides a preheating device for the annular seam of a wind turbine tower before welding, as shown in the attached Figure 1 and attached Figure 2 As shown, it includes a lifting base 1 and two sets of preheating units arranged in parallel on the lifting base, and the two sets of preheating units preheat the welds of the two towers to be welded respectively. The preheating unit includes an arc-shaped blind pipe 2 arranged obliquely, a plurality of nozzles 3 evenly distributed on the arc-shaped blind pipe 2 (the nozzles are connected to the arc-shaped blind pipe) and an adjustable bracket 4 arranged at the bottom of the arc-shaped blind pipe 2; wherein the nozzle 3 is arranged perpendicular to the tangent direction of the arc-shaped blind pipe 2; the arc-shaped blind pipe 2 is connected to a gas pipeline 5 with a valve through a joint, and the gas pipeline is connected to a gas tank (not shown in the figure). The gas in this embodiment uses propane, but is not limited to propane; the arc-shaped blind pipe in this embodiment has the advantages of simple structure and low manufacturing cost.

[0034] Preferably, the adjustable bracket 4 comprises a fixed column 4.1 hinged to the lower end of the arc-shaped blind tube 2 and an adjustable column 4.2 hinged to the upper end of the arc-shaped blind tube 2, and the fixed column 4.1 and the adjustable column 4.2 are welded to the lifting base 1. This design enables the arc-shaped blind tube to adjust its inclination through the adjustable column and its height through the lifting base, thereby achieving preheating before welding for towers of different specifications. This adjustment structure does not have the problem of angle changes between nozzles, ensuring that the tower is heated evenly.

[0035] Preferably, the lifting base 1 of the present embodiment adopts a scissor-type hydraulic lifting platform vehicle, preferably a pedal-type scissor-type hydraulic lifting platform vehicle, which can be directly purchased.

[0036] Preferably, as attached Figure 1 As shown, the adjustable column 4.2 comprises a first fixing sleeve 4.2.1 welded on the lifting base 1, a second fixing sleeve 4.2.2 hinged on the arc-shaped blind tube 2, and a double-headed screw 4.2.3 with two ends respectively threadedly connected to the first fixing sleeve 4.2.1 and the second fixing sleeve 4.2.2, and the threads at the two ends of the double-headed screw 4.2.3 are in opposite directions. When adjusting, the inclination of the arc-shaped blind tube can be adjusted by simply rotating the double-headed screw.

[0037] Preferably, the bare rod section of the double-headed screw 4.2.3 is fixedly mounted with a hand wheel 4.2.4 to facilitate the operation of the double-headed screw.

[0038] Embodiment 2

[0039] Based on the first embodiment, as shown in the attached Figure 1 As shown, this embodiment is also provided with a high-voltage electronic ignition device 6, which includes a power supply, an ignition control circuit, an ignition switch, a high-voltage transmission line and an ignition needle. The high-voltage electronic ignition device is a prior art and will not be described in detail here. For details, reference may be made to a high-voltage electronic ignition device provided by Chinese patent application number CN200620116461.6.

[0040] Preferably, the ignition needle 6.1 of the high-voltage electronic ignition device 6 of this embodiment is arranged on the nozzle 3 close to the middle of the arc-shaped blind tube 2, and the ignition switch 6.2 thereof is arranged on the push handle of the lifting base 1.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A preheating device for girth welding of a wind turbine tower, characterized in that: It comprises a lifting base and two sets of preheating units arranged in parallel on the lifting base; The preheating unit comprises an arc-shaped blind pipe arranged obliquely, a plurality of nozzles evenly distributed on the arc-shaped blind pipe, and an adjustable bracket arranged at the bottom of the arc-shaped blind pipe, wherein the arc-shaped blind pipe is connected to a gas pipeline with a valve through a joint; The adjustable bracket comprises a fixed column hinged to the lower end of the arc-shaped blind tube and an adjustable column hinged to the upper end of the arc-shaped blind tube, and the fixed column and the adjustable column are both welded to the lifting base.

2. The preheating device for the girth seam welding of a wind turbine tower according to claim 1 is characterized in that: The lifting base adopts a scissor-type hydraulic lifting platform vehicle.

3. The preheating device before the girth welding of a wind turbine tower according to claim 1 is characterized in that: The adjustable column includes a first fixing sleeve welded on the lifting base, a second fixing sleeve hinged on the arc-shaped blind tube, and a double-headed screw with two ends respectively threadedly connected to the first fixing sleeve and the second fixing sleeve, and the threads at the two ends of the double-headed screw have opposite rotation directions.

4. The preheating device for the girth seam welding of a wind turbine tower according to claim 3 is characterized in that: The smooth rod section of the double-head screw is fixedly mounted with a hand wheel.

5. The preheating device before welding of the wind turbine tower girth seam according to claim 1 is characterized in that: The nozzle is arranged perpendicular to the tangent direction of the arc-shaped blind pipe.

6. The preheating device before welding of the wind turbine tower girth according to any one of claims 1 to 5, characterized in that: It also includes a high-voltage electronic ignition device, wherein an ignition needle of the high-voltage electronic ignition device is arranged on a nozzle close to the middle of the arc-shaped blind tube.

7. The preheating device before welding of the wind turbine tower girth according to claim 6 is characterized in that: The ignition switch of the high-voltage electronic ignition device is arranged on the push handle of the lifting base.

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