CN111173691A - Device and method for repairing damage of local paint surface of wind power blade - Google Patents
Device and method for repairing damage of local paint surface of wind power blade Download PDFInfo
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- CN111173691A CN111173691A CN201911395191.5A CN201911395191A CN111173691A CN 111173691 A CN111173691 A CN 111173691A CN 201911395191 A CN201911395191 A CN 201911395191A CN 111173691 A CN111173691 A CN 111173691A
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- sealing cover
- temperature
- humidity
- wind power
- paint surface
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/50—Maintenance or repair
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to a device for repairing damage of a local paint surface of a wind power blade. Wherein, a vertical column is fixed on the movable vehicle body, the vertical column is vertically fixed on the movable vehicle body, and a cantilever is arranged on the vertical column. A sealing cover is fixed at one end of the cantilever, a temperature adjusting device and a humidity adjusting device are arranged in the sealing cover, an opening is formed in the bottom of the sealing cover, a circle of following molding strips are arranged along the edge of the opening, the following molding strips form a closed ring shape along the opening, and the opening is communicated with the inner space of the sealing cover; the side wall of the sealing cover is provided with at least one operation window, the operation window is provided with a window door, and the window door can be opened or closed and seals the operation window when closed. The device provided by the invention is used for providing local environmental conditions meeting the working characteristics of the coating in the process of repairing the local part of the wind power blade by paint repair, so that the blade can complete the damage and maintenance of the paint surface without being detached from a wind motor bracket or being returned to a factory and can meet the specified quality requirement.
Description
Technical Field
The invention relates to the technical field of wind power blade manufacturing and maintenance, in particular to a device and a method for maintaining damage of a local paint surface of a wind power blade.
Background
The surface protection paint for the wind power blade is damaged to a certain extent sometimes due to various factors in the hoisting and transportation processes. Under unconventional conditions, the maintenance work of damaging the paint surface is carried out immediately, and the quality is not reduced, which is one of the guarantee conditions for the continuous and reliable operation of the blade. Generally, most paint varieties are brushed under the environmental conditions that the temperature is 16-35 ℃ and the humidity is 10-70%, and special paint can work under the conditions that the temperature is more than 3 ℃ and the humidity is less than or equal to 85%. However, many environmental conditions (such as field hoisting construction sites) of the maintenance site obviously cannot meet the material use design requirements. In order to assemble, install and operate the main machine as soon as possible, finish paint surface damage maintenance and meet the specified quality requirement under the condition that the blade does not return to a factory, a certain method is necessary to be adopted to improve the small environment of a maintenance area so as to meet the working characteristics of the coating.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems in the prior art, the invention provides a device and a method for repairing the damage of the local paint surface of a wind power blade, which are used for providing local environmental conditions meeting the working characteristics of a coating in the process of repairing and repairing the local paint surface of the wind power blade, so that the damage and repair of the paint surface of the blade can be completed without detaching the blade from a wind power generator bracket or returning the blade to a factory, and the specified quality requirement can be met. The device provided by the invention provides a maintenance condition for the damaged paint surface of the wind power blade in a severe environment, and has strong environmental adaptability.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
a wind-powered electricity generation blade local painted surface damage maintenance device, it includes:
the device comprises a movable vehicle body, a lifting device and a lifting device, wherein a stand column is fixed on the movable vehicle body and is vertically fixed on the movable vehicle body; a cantilever is arranged on the upright post;
a sealing cover is fixed at one end of the cantilever, a temperature adjusting device and a humidity adjusting device are arranged in the sealing cover, an opening is formed in the bottom of the sealing cover, a circle of following strips are arranged along the edge of the opening, the following strips form a closed ring shape along the opening, and the opening is communicated with the inner space of the sealing cover;
the side wall of the sealing cover is provided with at least one operation window, the operation window is provided with a window door, and the window door can be opened or closed and is sealed when closed.
The number of the operation windows is 1-4, and the operation windows can be used for wind power maintenance personnel to fill and paint the positions with paint surface damage on the wind power surface. The sealing cover is generally made of a plastic film or an aluminum-plated film, and is an air-impermeable material, and a material with better heat insulation performance is more preferably adopted. The height of the inner space of the sealing cover is 1-1.5 m, and the inner space is 3-6 cubic meters.
According to the preferred embodiment of the invention, the sealing cover is connected below the cantilever through a rotating device, so that the sealing cover can be adjusted in a rotating way; the cantilever is relative the stand transversely extends, just the cantilever with the junction of stand is equipped with rotary mechanism, with the help of rotary mechanism can adjust the contained angle of cantilever for the horizontal plane. The rotation can be realized by a stepping motor and a worm gear transmission, and can also be realized by a pneumatic cylinder or a hydraulic cylinder.
According to the preferred embodiment of the invention, the bottom of the movable vehicle body is provided with a roller; one end of the movable vehicle body, which is relatively far away from the upright post, is provided with a balancing weight or/and a ground anchor fixing structure.
According to the preferred embodiment of the invention, the upright post is an extension or contraction post, the height of the extension or contraction post can be adjusted, and the cantilever and the sealing cover on the cantilever are driven to be lifted and lowered by the extension or contraction of the upright post. The extension or shortening of the upright can be realized by means of a hydraulic cylinder; for example, the bottom of the upright column is a hydraulic cylinder, the upper section of the upright column is a piston rod, and the cantilever is assembled on the piston rod.
According to the preferred embodiment of the invention, the temperature adjusting device is a fuel oil blast lamp or an infrared heater, the humidity adjusting device is an ultrasonic atomization humidifier, and a temperature and humidity sensor is arranged in the sealing cover; the temperature and humidity sensor is in communication connection with the control module, and the control module controls and adjusts working parameters of the temperature adjusting device and the humidity adjusting device according to temperature and humidity data acquired by the temperature and humidity sensor in real time, so that closed-loop control of temperature and humidity in the sealing cover is realized. Preferably, the temperature inside the sealing cover is 10-45 ℃ and the humidity is 10-70%.
Specifically, when the temperature adjusting device is a fuel blowtorch, the power of a fuel delivery pump, the opening degree of a fuel delivery pipeline throttle valve and the like can be adjusted, and when the temperature adjusting device is an infrared heater, the working current of the infrared heater can be adjusted to achieve adjustment.
According to a preferred embodiment of the present invention, the temperature adjusting means and the humidity adjusting means are connected to the cantilever and are each covered inside by the sealing cover.
According to a preferred embodiment of the invention, the shape of the opening is circular or elliptical, preferably elliptical.
According to the preferred embodiment of the invention, the profile strip is a lead strip, a rubber sealing strip or a water-filled hose. In addition, the profile strips are hoses and air bags capable of being inflated and deflated, and the opening edge of the sealing cover can be tightly attached to the surface (with a radian area) of the wind power blade through inflation and deflation adjustment, so that the sealing degree in the sealing cover is improved.
According to the preferred embodiment of the invention, the outer side of the profile following strip is also coated with flexible material. The flexible material is sponge, glue absorption felt or gel and the like. The profile strip and the flexible material coated on the outer side of the profile strip can be well attached to the surface of the wind power blade, so that high sealing degree is achieved in the sealing cover, and the local temperature and humidity condition meeting the working characteristics of paint is maintained.
The invention also provides a maintenance method for the damage of the local paint surface of the wind power blade, which is characterized in that the maintenance device for the damage of the local paint surface of the wind power blade is adopted, the opening of the sealing cover is covered on the damage part of the paint surface on the surface of the wind power blade by adjusting the spatial position of the sealing cover under the condition that the wind power blade is not detached and is kept still, then a maintenance worker or a maintenance machine is conveyed to the sealing cover by a hoisting device, the operation window of the sealing cover is opened, the damage part of the paint surface is subjected to maintenance treatment such as filling, leveling and painting, the operation window is closed after the maintenance is finished, the position of the sealing cover is kept still, and the temperature and humidity in the sealing cover are kept within a specific range by a temperature regulation device and a humidity regulation device, so that the damage and maintenance of the paint surface of the blade meet the specified quality requirement.
Preferably, a temperature and humidity sensor is arranged in the sealing cover and is connected with a control module through remote communication, the control module controls and adjusts working parameters of the temperature adjusting device and the humidity adjusting device according to temperature and humidity data acquired by the temperature and humidity sensor in real time, closed-loop control of temperature and humidity in the sealing cover is achieved, the temperature in the sealing cover is kept at 10-45 ℃, and the humidity is kept at 10-70%.
(III) advantageous effects
The invention has the beneficial effects that:
the invention also provides a device for repairing the damage of the local paint surface of the wind power blade, which is used for providing local environmental conditions meeting the working characteristics of the coating in the process of repairing the local paint surface of the wind power blade, so that the blade can complete the damage repair of the paint surface without being detached from a wind motor bracket or being returned to a factory and can meet the specified quality requirement. The device provided by the invention provides a maintenance condition for the damaged paint surface of the wind power blade in a severe environment, and has strong environmental adaptability. The invention provides a local environment control and regulation system for maintaining the paint surface of the wind turbine blade, and is particularly suitable for local maintenance of the wind turbine blade in the working site of a field wind turbine generator. When the paint damage maintenance surface is large, the maintenance can be completed for multiple times by areas without integrally disassembling the blade, returning the blade to a factory and the like, and the cost of manpower and material resources is saved.
Drawings
Fig. 1 is a schematic view of a wind turbine blade local paint damage repair device according to a preferred embodiment of the present invention.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
Example 1
As shown in fig. 1, a repair device 100 for local paint damage of a wind turbine blade according to the present invention includes: the movable vehicle comprises a movable vehicle body 10, wherein a vertical column 20 is fixed on the movable vehicle body 10, the vertical column 20 is vertically fixed on the movable vehicle body 10, and a cantilever 30 is installed on the vertical column 20. A sealing cover 40 is fixed to one end of the arm 20, and a temperature control device 50 and a humidity control device 60 are provided in the sealing cover 40. Wherein, the bottom of the sealing cover 40 is provided with an opening 41, a circle of following section bars 411 are arranged along the edge of the opening 41, and the following section bars 411 form a closed ring shape along the opening 41. Wherein the opening 41 communicates with the inner space of the sealing cap 40. The side wall of the sealing cover 40 is provided with at least one operation window 42, and the operation window is provided with a window door, and the window door can be opened or closed and seals the operation window 42 when closed. The window and door may be automatically controlled to open or close by a control device or module 70.
The number of the operation windows 42 is 1-4, and the operation windows can be used for a wind power maintenance worker to perform operations such as filling, painting and the like on a position D with paint surface damage on the wind power surface. The sealing cover 40 is generally made of a plastic film or an aluminum-plated film, and is made of an air-impermeable material, preferably a material having a good heat-insulating property. The height of the inner space of the sealing cap 40 is 1-1.5 m, and the inner space is 3-6 cubic meters.
When the wind power blade S needs to be maintained, the opening of the sealing cover 40 can be covered on the damaged part D of the paint surface on the surface of the wind power blade S, then a maintenance worker or an automatic paint spraying gun is delivered to the sealing cover 40 through the lifting device, the control device or the control module opens the operation window 42 of the sealing cover 40 according to a preset program so as to fill and supplement the damaged part D of the paint surface and perform maintenance treatment such as paint spraying, and after the maintenance is completed, the operation window 42 is closed. The position of the sealing cover 40 is kept still, and the temperature and the humidity in the sealing cover 40 are kept within a specific range through the temperature adjusting device 50, the humidity adjusting device 60 and the combination of the adjustment of the opening degree of the operation window 42, so that the damage and the maintenance of the blade paint surface reach the specified quality requirement.
Further, the seal cover 40 is connected below the cantilever 30 by a rotating device 31, so that the seal cover 40 can be rotatably adjusted. The cantilever 30 extends transversely relative to the upright 20, and the joint of the cantilever 30 and the upright 20 is provided with a rotating mechanism 32, so that the included angle of the cantilever 30 relative to the horizontal plane can be adjusted by the rotating mechanism 32, and the orientation and the direction of the opening 41 of the sealing cover 40 can be flexibly adjusted. The various adjustment methods described above are intended to attach the opening 41 of the seal cover 40 to the surface of the wind turbine blade S. The rotation can be realized by a stepping motor and a worm gear transmission, and can also be realized by a pneumatic cylinder or a hydraulic cylinder.
As shown in fig. 1, the bottom of the moving body 10 is provided with a roller 11, and one end of the moving body 10 relatively far away from the upright post 20 is provided with a counterweight 12 and/or an anchor fixing structure 13.
Preferably, the upright column 20 is an extension or contraction column, the height of the extension or contraction column can be adjusted, and the extension or contraction of the upright column 20 drives the cantilever 30 and the seal cover 40 on the cantilever 30 to realize lifting adjustment in height. The lengthening or shortening of the upright 20 can be achieved by means of hydraulic cylinders; for example, the bottom of the column is a hydraulic cylinder, the upper section of the column is a piston rod, and the boom 30 is assembled on the piston rod. Or, the cantilever 30 can be adjusted to move up and down on the column 20 with fixed length by a hinge device with two ends supported on gears or a gear-rack combination device. In summary, the purpose is to make the height of the space in which the sealing cap 40 is located adjustable. The upright column 20 is made of steel or aluminum, and the metal material is generally a section bar such as square steel or round steel.
The temperature adjusting device 50 is a fuel oil torch or an infrared heater, and the fuel of the fuel oil torch can be alcohol or kerosene. The infrared heater can be a far infrared bulb or a far infrared electric heating plate, and the power supply can be a mobile power supply such as a storage battery or a fixed power supply such as a 220V alternating current power supply. The infrared heater is fixed on a heat source support, the heat source support is connected with the cantilever 30 and forms a certain angle, and the angle can be adjusted within the range of 0-180 degrees, so that the infrared heater just faces the surface of the repaired wind power blade S.
The humidity adjusting device 60 may be an ultrasonic atomization humidifier.
Further, a temperature and humidity sensor is further arranged in the sealing cover 40 and used for monitoring the temperature and humidity in the sealing cover 40 in real time. Preferably, the temperature and humidity sensor is in communication connection with the control module 70, and the control module 70 controls and adjusts the working parameters of the temperature adjusting device 50 and the humidity adjusting device 60 according to the temperature and humidity data acquired by the temperature and humidity sensor in real time, so as to realize the closed-loop control of the temperature and humidity in the sealing cover 40. Specifically, when the thermostat 50 is a fuel burner, the control module 70 may adjust the power of the fuel delivery pump, the opening of the fuel delivery pipe throttle valve, and the like, and when the thermostat 50 is an infrared heater, the operating current of the infrared heater 50 may be adjusted to achieve the adjustment. When cooling or humidity reduction is required, the control module 70 may control all the operation windows 42 to be opened to achieve ventilation and cooling. In addition, a fan (or a fan near the operation window 42) may be further disposed in the sealing cover 40, so that on one hand, the flow of air inside the sealing cover 40 may be increased to uniformize the temperature and humidity, and on the other hand, when the temperature and humidity are required to be reduced, the temperature and humidity may be rapidly reduced and the humidity may be reduced by opening the fan and the operation window 42. Preferably, the temperature inside the sealing cover 40 is kept at 10-45 ℃ and the humidity is kept at 10-70% by matching the above components.
In order to reduce the load of the sealing cover 40, the temperature control device 50 and the humidity control device 60 (including auxiliary devices such as a battery and a fan, which are fixed below the arm 30) are fixed below the arm 30 and are covered by the sealing cover 40.
The opening 41 of the sealing cap 40 may be square, circular, or oval, preferably circular, or more preferably oval. The oval shape is a shape that can cover most of the differently shaped "painted surface damaged areas", so the opening 41 is preferably oval.
Further, the conformal strip 411 is a lead strip, a rubber sealing rubber strip or a water-filled hose. In addition, the shape-following strip 411 is a hose or an air bag capable of performing inflation and deflation, and the edge of the opening 41 of the sealing cover 40 can be closely matched with the surface (the area with radian) of the wind power blade S through inflation and deflation adjustment, so that the sealing degree in the sealing cover 40 is improved.
Further, a flexible material is coated on the outer side of the conformal strip 411. The flexible material may be a sponge, a blotter felt, a gel, or the like. The profile 411 and the flexible material coated on the outer side of the profile can be well attached to the surface of the wind power blade S, so that high sealing degree is achieved in the sealing cover 40, and the condition of meeting the local temperature and humidity requirement of the working characteristic of the paint vehicle of the wind power blade is maintained.
In addition, the invention also correspondingly provides a maintenance method for the damage of the local paint surface of the wind power blade, which is characterized in that by means of the maintenance device for the damage of the local paint surface of the wind power blade, under the condition that the wind power blade is not detached and is kept still, through one or more adjustment combinations such as the lifting height adjustment of the upright post 20, the pitching angle adjustment of the cantilever 30, the rotation adjustment of the sealing cover 40, the position adjustment of the movable vehicle body 10 and the like, the opening 41 of the sealing cover 40 is just covered on the damaged part D of the paint surface on the surface of the wind power blade S, then a maintenance worker or a maintenance machine is conveyed to the sealing cover through the lifting device, the operation window 42 of the sealing cover 40 is opened, the maintenance treatment such as scraping, leveling, painting and the like is carried out on the damaged part D of the paint surface through the operation window 42, after the maintenance is finished, the operation window 42 is closed, the position of the sealing cover 42 is kept still, and the maintenance device 50, the temperature and the humidity in the sealing cover 40 are kept within a specific range, so that the damage and the maintenance of the blade paint surface meet the specified quality requirement.
It should be noted that the above-mentioned embodiments only illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or various changes and equivalents may be made without departing from the technical solution of the present invention.
Claims (10)
1. The utility model provides a local lacquer painting damage maintenance device of wind-powered electricity generation blade which characterized in that, it includes:
the device comprises a movable vehicle body, a lifting device and a lifting device, wherein a stand column is fixed on the movable vehicle body and is vertically fixed on the movable vehicle body; a cantilever is arranged on the upright post;
a sealing cover is fixed at one end of the cantilever, a temperature adjusting device and a humidity adjusting device are arranged in the sealing cover, an opening is formed in the bottom of the sealing cover, a circle of following strips are arranged along the edge of the opening, the following strips form a closed ring shape along the opening, and the opening is communicated with the inner space of the sealing cover;
the side wall of the sealing cover is provided with at least one operation window, the operation window is provided with a window door, and the window door can be opened or closed and is sealed when closed.
2. The device for repairing the local paint surface damage of the wind power blade as claimed in claim 1, wherein the sealing cover is connected below the cantilever through a rotating device, so that the sealing cover can be adjusted in a rotating manner; the cantilever is relative the stand transversely extends, just the cantilever with the junction of stand is equipped with rotary mechanism, with the help of rotary mechanism can adjust the contained angle of cantilever for the horizontal plane.
3. The device for repairing the local paint surface damage of the wind power blade as claimed in claim 1, wherein the bottom of the movable vehicle body is provided with a roller; one end of the movable vehicle body, which is relatively far away from the upright post, is provided with a balancing weight or/and a ground anchor fixing structure.
4. The device for repairing the local paint surface damage of the wind power blade as claimed in claim 1, wherein the upright post is an extension or contraction post, the height of the extension or contraction post can be adjusted, and the cantilever and the sealing cover on the cantilever are driven to be lifted and lowered in height by extension or contraction of the upright post.
5. The device for repairing the local paint surface damage of the wind power blade according to claim 1, wherein the temperature adjusting device is a fuel oil blast lamp or an infrared heater, and the humidity adjusting device is an ultrasonic atomization humidifier; the temperature and humidity control system is characterized in that a temperature and humidity sensor is arranged in the sealing cover and is in communication connection with a control module, and the control module controls and adjusts working parameters of the temperature adjusting device and the humidity adjusting device according to temperature and humidity data acquired by the temperature and humidity sensor in real time, so that closed-loop control of temperature and humidity in the sealing cover is realized.
6. The device for repairing damage of local paint surface of wind turbine blade as claimed in claim 1, wherein the shape of said opening is elliptical.
7. The device for repairing damage of local paint surface of wind power blade according to claim 6, wherein the following strip is a lead strip, a rubber sealing rubber strip or a water filling hose.
8. The device for repairing the local paint surface damage of the wind power blade according to claim 7, wherein the outer side of the profile strip is further coated with a flexible material, and the flexible material is sponge, gel-absorbing felt or gel.
9. A maintenance method for damage of a local paint surface of a wind power blade is characterized in that the maintenance device for damage of the local paint surface of the wind power blade is adopted, under the condition that the wind power blade is not detached and is kept still, the space position of a sealing cover is adjusted to enable an opening of the sealing cover to cover a damaged part of the paint surface on the surface of the wind power blade, then a lifting device is used for sending maintenance personnel or maintenance machinery to the sealing cover, an operation window of the sealing cover is opened to carry out maintenance treatment such as filling, painting and the like on the damaged part of the paint surface, the operation window is closed after maintenance is finished, the position of the sealing cover is kept still, and temperature and humidity in the sealing cover are kept within a specific range through a temperature adjusting device and a humidity adjusting device to enable the damage and maintenance of the paint surface of the blade to reach the specified quality requirements.
10. The maintenance method according to claim 9, wherein a temperature and humidity sensor is arranged in the sealing cover, the control module is connected through remote communication, and the control module controls and adjusts working parameters of the temperature adjusting device and the humidity adjusting device according to temperature and humidity data acquired by the temperature and humidity sensor in real time, so that closed-loop control of temperature and humidity in the sealing cover is realized, the temperature in the sealing cover is kept at 10-45 ℃, and the humidity is kept at 10-70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395191.5A CN111173691B (en) | 2019-12-30 | 2019-12-30 | Device and method for repairing damage of local paint surface of wind power blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395191.5A CN111173691B (en) | 2019-12-30 | 2019-12-30 | Device and method for repairing damage of local paint surface of wind power blade |
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| CN111173691A true CN111173691A (en) | 2020-05-19 |
| CN111173691B CN111173691B (en) | 2021-09-21 |
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| US20180363319A1 (en) * | 2017-06-20 | 2018-12-20 | Airbus Sas | Method for repairing a structure comprising at least one zone to be heated |
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| CN111173691B (en) | 2021-09-21 |
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