Wind tower flange eversion correction device

Abstract

A device for correcting the flange tumbling of a wind turbine tower relates to the technical field of wind turbine tower manufacturing, and comprises an adjusting mechanism detachably mounted on the flange and a heating gun for heating the flange, wherein the adjusting mechanism comprises mounting plates respectively used to be connected to the corresponding flange positions at the front and rear ends of the wind turbine tower and a hand chain hoist connecting the two mounting plates, wherein the inner wall surface of the mounting plate can be close to the tumbling area of ​​the flange, one end of the mounting plate is connected to the flange, and the other end extends in the axial direction of the wind turbine tower so that the inner wall surface of the mounting plate is higher than the flange, and the hand chain hoist comprises a sprocket, a chain, and two hooks respectively arranged on the sprocket and the chain, wherein the sprocket is located close to the flange to be corrected, and a manual chain for adjusting the chain is extended from the sprocket, and the manual chain can be extended from one end of the wind turbine tower. The present invention can correct the flange simultaneously during the flame heating process, and there is no need to heat the flange to an excessively high temperature and then perform sudden cooling and shrinking, and the operation is simple.

Description

Technical Field

[0001] The invention relates to the technical field of wind power tower manufacturing, and in particular to a wind power tower flange eversion correction device. Background Art

[0002] In recent years, in order to achieve sustainable development and effectively utilize green energy, wind power generation has begun to be widely used. As a part of the wind turbine tower, the tower is an important infrastructure for wind power generation equipment. The wind turbine tower has very high requirements for the connection surface of the tower flange. Generally, the flatness of the flange after welding is required to be 1~2mm; the inclination of the flange is 0.5~1.5mm, and the flange must be tilted inwards, and the surface is strictly prohibited from turning outward.

[0003] When the flange of a wind turbine tower is turned outward or the inclination is unqualified, flame correction is usually used for correction. Specifically, the unqualified area of ​​the cylinder flange is heated to release the stress in the area, thereby achieving the effect of correcting the inclination value. The principle of flame correction is to make the heated point continue to heat to a high temperature and then expand, causing the degree of bending to increase, and then immediately cool it with water. The area suddenly cools and contracts and then bends in a certain direction, and the amount of bending deformation exceeds the increase in bending during heating. The excess is the correction amount.

[0004] However, the above flame straightening method has obvious disadvantages. Since the flame straightening technology is not easy to master, it has high requirements for the operator. The operator must be able to accurately judge the heating stress reduction zone and then accurately grasp the timing of cooling immediately after heating. Otherwise, the effect will be counterproductive. Severe improper operation may even lead to excessive changes in the metallographic structure of the processing area, thereby affecting the structural stability of the flange. Summary of the invention

[0005] The purpose of the present invention is to provide a wind turbine tower flange eversion correction device that can be used in conjunction with flame heating for correction. The flange can be corrected simultaneously during the flame heating process, without the need to heat the flange to an excessively high temperature and then perform sudden cooling and shrinkage, and the operation is simple.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a wind turbine tower flange eversion correction device, comprising an adjustment mechanism detachably mounted on the flange and a baking gun for heating the flange, the adjustment mechanism comprising mounting plates respectively used to be connected to the flange positions corresponding to the front and rear ends of the wind turbine tower and a hand chain hoist connecting the two mounting plates, the inner wall surface of the mounting plate can be close to the eversion area of ​​the flange, one end of the mounting plate is connected to the flange, and the other end extends in the axial direction of the wind turbine tower so that the inner wall surface of the mounting plate is higher than the flange, the hand chain hoist comprises a sprocket, a chain and two hooks respectively arranged on the sprocket and the chain, the sprocket is located close to the flange to be corrected, a manual chain for adjusting the chain extends from the sprocket, and the manual chain can extend from one end of the wind turbine tower, and in the process of the baking gun heating the eversion area of ​​the flange, the manual chain can be pulled at the same time, so that the hand chain hoist tightens the mounting plate inward, so that the mounting plate is pushed inward against the flange, and then the eversion area of ​​the flange is gradually corrected.

[0007] Preferably, a lifting ear is fixedly connected to the inner wall surface of the mounting plate, and a through hole for a hook to hook is formed on the lifting ear.

[0008] More preferably, the mounting plate is provided with a plurality of mounting holes matching the threaded holes on the flange, and the mounting plate is connected to the flange via threads.

[0009] More preferably, the mounting plate is made of steel plate, and the number of mounting holes on the mounting plate is at least 5.

[0010] More preferably, it also includes two rotating trolleys for supporting the wind turbine tower, each rotating trolley is provided with two supporting rollers and a motor capable of driving the supporting rollers to rotate, the wind turbine tower can be placed on four supporting rollers, and the motor can synchronously drive the wind turbine tower to rotate when driving the supporting rollers to rotate.

[0011] More preferably, a U-shaped groove is provided on the top of the rotating trolley, and the two supporting rollers are respectively located on both sides of the U-shaped groove.

[0012] More preferably, a bearing seat is respectively provided at both ends of the support roller, the support roller is connected to the two bearing seats via a rotating shaft, and one end of the rotating shaft is connected to the motor via a chain drive.

[0013] The working principle of the present invention is: first, connect the mounting plate to the outward-turned area of ​​the flange, then connect a mounting plate to the corresponding position of the flange at the other end of the wind turbine tower, then use a hand winch to connect the two mounting plates, and make the sprocket of the hand winch close to the flange end to be corrected, and then pull the manual chain out from one end of the wind turbine tower. At this time, the outward-turned area of ​​the flange can be heated by a flame using a baking gun. During the heating process, the manual chain can be pulled at the same time, so that the hand winch generates a pulling force on the mounting plate. When the mounting plate is subjected to force, it will push inward against the flange, thereby gradually correcting the outward-turned area of ​​the flange.

[0014] By providing the above-mentioned adjustment mechanism, the flange eversion correction operation can be performed simultaneously during the heating process with the baking gun. There is no need to wait for the flange to be heated to an excessively high temperature and then to suddenly cool and shrink it. The operation is simple and the risk of damage to the stability of the flange structure can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the present invention;

[0016] Figure 2 Schematic diagram of the structure of the mounting plate in the embodiment.

[0017] The accompanying drawings are marked as follows:

[0018] 1——Flange 2——Baking gun 3——Wind power tower

[0019] 4——Mounting plate 4a——Mounting hole 5a——Sprocket

[0020] 5b——Chain 5c——Hook 5d——Manual chain

[0021] 6——Lifting eye 7——Rotating trolley 7a——Supporting roller

[0022] 7b——Bearing seat. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0024] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, in the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them instead of being in direct contact. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "above", "below", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention.

[0026] like Figure 1-2 As shown, the wind turbine tower flange eversion correction device includes an adjustment mechanism detachably mounted on the flange 1 and a heating gun 2 for heating the flange 1, the adjustment mechanism includes mounting plates 4 respectively used to be connected to the positions of the flange 1 at the front and rear ends of the wind turbine tower 3 corresponding to the positions of the flange 1 and a hand chain hoist connecting the two mounting plates 4, the inner wall surface of the mounting plate 4 can be close to the eversion area of ​​the flange 1, one end of the mounting plate 4 is connected to the flange 1, and the other end extends toward the axial direction of the wind turbine tower 3 so that the inner wall surface of the mounting plate 4 is higher than the flange 1, the hand chain hoist includes a sprocket 5a, a chain 5b and two hooks 5c respectively arranged on the sprocket 5a and the chain 5b, the sprocket 5a is located close to the flange 1 to be corrected, and a manual chain 5d for adjusting the chain 5b extends from the sprocket 5a, and the manual chain 5d can extend from one end of the wind turbine tower 3.

[0027] When the wind turbine tower flange eversion correction device provided by the above-mentioned embodiment is working, the mounting plate 4 is first connected to the eversion area of ​​the flange 1, and then a mounting plate 4 is also connected to the corresponding position of the flange 1 at the other end of the wind turbine tower 3, and then the two mounting plates 4 are connected together by a hand winch, and the sprocket 5a of the hand winch is made close to the end of the flange 1 to be corrected, and then the manual chain 5d is pulled out from one end of the wind turbine tower 3. At this time, the baking gun 2 can be used to flame heat the eversion area of ​​the flange. During the heating process, the manual chain 5d can be pulled at the same time, so that the hand winch generates a pulling force on the mounting plate 4. When the mounting plate 4 is subjected to force, it will push inward against the flange 1, thereby gradually correcting the eversion area of ​​the flange 1.

[0028] By setting the above-mentioned adjustment mechanism, the flange 1 can be corrected outwardly while being heated by the baking gun 2. There is no need to wait for the flange 1 to be heated to an excessively high temperature and then to be suddenly cooled and shrunk. The operation is simple and the risk of damage to the structural stability of the flange 1 can be reduced.

[0029] It should be noted that the hand chain hoist in the above embodiment is a common device in the prior art and can be directly selected from existing hand chain hoists. In order to pull out the manual chain 5d from one end of the wind turbine tower 3, the manual chain 5d can be installed in a cover so that the cover can be rotatably connected to the outer shell on which the sprocket 5a is installed. In this way, by rotating the cover 360 degrees, the hand chain hoist can be operated from various angles, so that the manual chain 5d can be pulled out from one end of the wind turbine tower 3. Alternatively, the specific structure of the sprocket 5a and the manual chain 5d can also refer to the hand chain hoist disclosed in Chinese patent CN201140972 (the hand chain cover and the hand chain cover protective shell are rotatably connected), which will not be repeated here.

[0030] Those skilled in the art will understand that, since the corresponding positions of the flanges 1 at both ends of the wind turbine tower 3 are connected with mounting plates 4, when the hand winch is pulled, the mounting plates 4 at both ends will be subjected to force. However, except for the defective outward-turned area to be corrected, the other areas of the flange 1 are usually normally tilted inward. Therefore, while the flange 1 at one end is pushed by the mounting plate 4 to correct the outward-turned area, the flange 1 at the other end is already in a normal inward-tilted state. Even if it is subjected to a certain degree of inward thrust from the mounting plate 4, its shape will not be affected. Of course, if there are more outward-turned areas of the flange 1, multiple sets of adjustment mechanisms can also be set on the wind turbine tower 3. Due to the huge size of the wind turbine tower 3, after multiple sets of adjustment mechanisms are set, such as Figure 1 The three groups of adjustment mechanisms at the bottom and both sides of the medium wind power tower 3 can perform the flange 1 eversion correction work respectively under the operation of three groups of operators at the same time, thereby improving the efficiency of the correction work.

[0031] It should be further explained that the specific eversion data of the flange 1 can be detected by conventional technical equipment in the field, such as using an Easy Laser laser measuring instrument to measure the flange taper, and the obtained data is used as a reference to correct the flange 1. After the correction operation is completed, the above-mentioned equipment can also be used to detect the flange.

[0032] Preferably, a hanging ear 6 can be fixedly connected to the inner wall surface of the mounting plate 4, and a through hole for hooking the hook 5c is provided on the hanging ear 6, so as to facilitate the quick installation of the adjustment mechanism.

[0033] As a more preferred embodiment, a plurality of mounting holes 4a matching the threaded holes on the flange 1 are provided on the mounting plate 4, the mounting plate 4 is connected to the flange 1 by threads, and the mounting plate 4 is made of steel plate, the number of mounting holes 4a on the mounting plate 4 is at least 5, the mounting plate 4 can be specifically trapezoidal and the bottom edge is an arc-shaped matching the outer edge of the flange, by providing at least 5 mounting holes 4a, after all of them are connected to the mounting holes 4a of the flange 1, the mounting plate 4 can be made more firm, and the above-mentioned 5 mounting holes 4a are all close to the bottom edge of the trapezoidal mounting plate 4, and the ear 6 can be connected to a position close to the top edge of the inner wall of the trapezoidal mounting plate 4, so the force-bearing part of the mounting plate 4 is mainly concentrated on the upper part of the trapezoid, and the height of the upper part of the trapezoidal mounting plate 4 is greater than that of the flange 1, so after being subjected to force, it can act on the everted area of ​​the flange 1 with a certain degree of oblique extrusion force, so that the everted area can be corrected more effectively.

[0034] In addition, the correction device of this embodiment also includes two rotating trolleys 7 for supporting the wind turbine tower 3. Two supporting rollers 7a and a motor (not shown in the drawings) capable of driving the supporting rollers 7a to rotate are installed on each rotating trolley 7 at intervals. The wind turbine tower 3 can be placed on the four supporting rollers 7a. When the motor drives the supporting rollers 7a to rotate, the wind turbine tower 3 can be driven to rotate synchronously, so that the flange 1 can be easily rotated, so that the outward-turned area to be corrected can be moved to a position convenient for operation.

[0035] On the basis of the above, a U-shaped groove is opened on the top of the rotating trolley 7, and two supporting rollers 7a are respectively located on both sides of the U-shaped groove, and a bearing seat 7b is respectively provided at both ends of the supporting roller 7a. The supporting roller 7a is connected to the two bearing seats 7b through a rotating shaft, and one end of the rotating shaft is connected to the motor through a chain drive.

[0036] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

[0037] In order to make it easier for ordinary technicians in the field to understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and for the sake of clarity, some other elements are omitted in this application document. Ordinary technicians in the field should realize that these omitted elements may also constitute the content of the present invention.

Claims

1. Wind tower flange eversion correction device, characterized by: The invention comprises an adjustment mechanism detachably mounted on a flange (1) and a heating gun (2) for heating the flange (1), wherein the adjustment mechanism comprises mounting plates (4) respectively connected to the positions of the flange (1) at the front and rear ends of a wind turbine tower (3) and a hand chain hoist connecting the two mounting plates (4), wherein the inner wall surface of the mounting plate (4) can be abutted against the outward-turned area of ​​the flange (1), one end of the mounting plate (4) is connected to the flange (1) and the other end extends in the axial direction of the wind turbine tower (3) so that the inner wall surface of the mounting plate (4) is higher than the inner wall surface of the wind turbine tower (3). A flange (1), the hand chain hoist comprising a sprocket (5a), a chain (5b), and two hooks (5c) respectively arranged on the sprocket (5a) and the chain (5b), the sprocket (5a) being located close to the flange (1) to be corrected, a manual chain (5d) for adjusting the chain (5b) extending from the sprocket (5a), the manual chain (5d) being able to extend from one end of a wind turbine tower (3), the manual chain (5d) being installed in a casing, the casing being rotatably connected to a casing on which the sprocket (5a) is installed; During operation, the mounting plate (4) is first connected to the outward-turned area of ​​the flange (1), and then a mounting plate (4) is also connected to the corresponding position of the flange (1) at the other end of the wind turbine tower (3). The two mounting plates (4) are then connected together using a hand chain hoist, and the sprocket (5a) of the hand chain hoist is brought close to the end of the flange (1) to be corrected. The manual chain (5d) is then pulled out from one end of the wind turbine tower (3). While the heating gun (2) is heating the outward-turned area of ​​the flange (1), the manual chain (5d) is simultaneously pulled, so that the hand chain hoist tightens the mounting plate (4) inward, thereby pushing the mounting plate (4) inward against the flange (1), thereby gradually correcting the outward-turned area of ​​the flange (1).

2. The wind turbine tower flange eversion correction device according to claim 1 is characterized in that: A lifting lug (6) is fixedly connected to the inner wall surface of the mounting plate (4), and a through hole for the hook (5c) to hook is provided on the lifting lug (6).

3. The wind turbine tower flange eversion correction device according to claim 2 is characterized in that: The mounting plate (4) is provided with a plurality of mounting holes (4a) matching the threaded holes on the flange (1); the mounting plate (4) and the flange (1) are connected via threaded parts.

4. The wind turbine tower flange eversion correction device according to claim 3 is characterized in that: The mounting plate (4) is made of a steel plate, and the number of mounting holes (4a) on the mounting plate (4) is at least 5.

5. The wind turbine tower flange eversion correction device according to claim 1 is characterized in that: It also comprises two rotating trolleys (7) for supporting the wind turbine tower (3), each rotating trolley (7) being provided with two support rollers (7a) and a motor capable of driving the support rollers (7a) to rotate at intervals, the wind turbine tower (3) being placed on the four support rollers (7a), and when the motor drives the support rollers (7a) to rotate, the wind turbine tower (3) can be driven to rotate synchronously.

6. The wind turbine tower flange eversion correction device according to claim 5 is characterized in that: A U-shaped groove is provided on the top of the rotating trolley (7), and the two supporting rollers (7a) are respectively located on two sides of the U-shaped groove.

7. The wind turbine tower flange eversion correction device according to claim 6 is characterized in that: A bearing seat (7b) is provided at each end of the support roller (7a); the support roller (7a) is connected to the two bearing seats (7b) via a rotating shaft; one end of the rotating shaft is connected to the motor via a chain drive.

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