A method for manufacturing and applying a prefabricated part for internal anchor points of inclined upward blades

Abstract

The present invention relates to a prefabricated part for internal anchoring of an oblique upward blade, comprising: a hanging part, bonding parts connected to both sides of the hanging part, the hanging part being arc-shaped, and a gap being provided on the bonding part on the same side, so that the bonding part is divided into a first fixing part and a second fixing part. The method for making and applying a prefabricated part for internal anchoring of an oblique upward blade of the present invention solves the safety risks existing in the oblique upward operation inside the blade, and can be widely used for the maintenance of blades of various types of aircraft, which can not only save time and blade operation and maintenance costs, but also save the physical strength of the staff, and eliminate the safety hazards of the staff in the maintenance work of the oblique upward blade.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbine blade maintenance, and in particular relates to a method for manufacturing and applying a prefabricated anchor point component for an inclined upward blade interior. Background Art

[0002] In recent years, my country's wind power industry has developed rapidly, and the installed capacity has increased year by year. By the end of 2023, my country's cumulative installed capacity of wind power is 441.34GW. However, behind the rapid development of the wind power industry, the operation and maintenance of wind power generation equipment has become increasingly prominent, especially the maintenance of blades. As a key component of wind turbines to capture wind energy and convert it into electrical energy, the performance of blades directly affects the efficiency, stability and economic benefits of wind power generation. At the same time, during the long-term operation of blades, they are affected by various environmental factors and loads. If they are not maintained for a long time, they are prone to wear, cracks and even breakage, thus affecting the normal operation of wind power generation equipment.

[0003] At present, the oblique upward wind turbine blades are facing the dilemma of being unable to maintain normally. At present, the maintenance work of oblique upward blades in the industry is mainly carried out by suction cups or wearing non-slip shoes, using steel ladders, etc., that is, personnel wear safety belts and non-slip shoes, use safety belts, double hooks to hang suction cups, reach the maintenance position along the web or shell surface, and then use the hanging suction cups as anti-fall measures, and the personnel are in a suspended state to work; or personnel wear safety belts and non-slip shoes, transport steel ladders to the internal assembly of the blades, and personnel climb the steel ladders to the maintenance position to work; the first operation method is extremely unsafe for personnel to work in a suspended state and cannot be operated for a long time; and the second operation method is that the steel ladder is heavy and easy to slide sideways, the internal space of the wind turbine is limited during assembly and transportation, and it needs to be repeatedly disassembled and assembled, resulting in a cumbersome process and low efficiency. At the same time, the shutdown maintenance time of wind farms is limited, and some wind farms need to start the machine every day, resulting in personnel working overtime, being physically and mentally exhausted, and prone to safety accidents. Therefore, both operation methods are not suitable for long-term maintenance of oblique upward wind turbine blades. Summary of the invention

[0004] In order to solve the problems of the prior art, the present invention proposes a method for manufacturing and applying an internal anchor point prefabricated part of an inclined upward blade. The purpose of the present invention and the technical problem to be solved are achieved by adopting the following technical solutions.

[0005] According to the present invention, a prefabricated component for internal anchoring of an obliquely upward blade comprises a hanging portion, with bonding portions connected to both sides of the hanging portion, the hanging portion is arc-shaped, and a gap is provided on the bonding portion on the same side, so that the bonding portion is divided into a first fixing portion and a second fixing portion.

[0006] A method for manufacturing an internal anchor point prefabricated component for an oblique upward blade comprises the following steps: S1, select pipe fittings, lay bag film on the surface of pipe fittings, and place them on a flat surface; S2, cutting out glass fiber cloth that meets the process requirements, impregnating the glass fiber cloth with resin of qualified proportion, and hand-laying the cloth layer on the surface of the pipe fitting after impregnation. After hand-laying, laying a release cloth on the outer surface of the glass fiber cloth, and heating and curing; S3, after the curing is completed, the pipe fittings are removed and the formed prefabricated parts are processed to form the hanging parts and the bonding parts of the prefabricated parts.

[0007] The method for manufacturing the internal anchor point prefabricated component of the oblique upward blade of the present invention can also be further implemented by adopting the following technical measures: In the aforementioned manufacturing method, the bag film in step S1 can be replaced by a release cloth.

[0008] In the aforementioned manufacturing method, the glass fiber cloth in step S2 is hand-laid in at least four layers.

[0009] A method for applying a prefabricated internal anchor point of an obliquely upward blade, comprising the following steps: S1, the worker enters the blade from the wind turbine hub, wearing anti-slip and safety equipment; S2, alternately use the electric suction cup to reach the maintenance position inside the blade, then confirm the bonding position of the prefabricated parts and grind the position; S3, using a glue gun to apply glue to the bonding part of the prefabricated part, after applying it evenly, bonding it to the bonding position of the above step, and then curing it; S4, after the curing is completed, the safety rope and the rope ladder are pulled to the prefabricated component using the hoisting rope, and the safety rope and the rope ladder are fixed to the hanging part of the prefabricated component; S5, test the rope ladder and safety rope. First, draw a line mark on the bonding part of the prefabricated part. At the same time, the bottom and top workers enter the rope ladder for test. After the test, observe the displacement of the prefabricated part at the marked line. After passing the test, the bottom workers wear anti-slip and safety equipment as required, and hang on the fall arrester and safety rope, and climb to the designated position for maintenance work; S6, after the maintenance is completed, the top staff stays to stabilize the position through the electric suction cup, removes the rope ladder and safety rope on the prefabricated part, and then the top staff exits the blade through the electric suction cup.

[0010] The application method of the present invention for the internal anchor point prefabricated member of the oblique upward blade can also be further implemented by adopting the following technical measures: In the aforementioned application method, in step S3, the number of prefabricated parts bonded is at least two, one for connecting the safety rope and the other for hanging the rope ladder.

[0011] In the aforementioned application method, in step S4, a rope protective cover is provided at the contact point between the safety rope, the rope ladder and the prefabricated component. In summary, the method for manufacturing and applying the internal anchor point prefabricated part of the oblique upward blade in the present invention has the following advantages: Maintenance work is carried out by setting anchor prefabricated parts inside the wind turbine blades, bonding the anchor prefabricated parts, and setting up rope ladders. Glass fiber and resin of the same material as the blades are used, and hand-layup is carried out on a specific mold surface. After solidification, the required anchor prefabricated parts are obtained, which can be put into use after repairing the surrounding areas. The prefabricated parts have a simple structure and are convenient and quick to manufacture and use. At the same time, the present invention does not damage the internal structure of the blades, does not need to be dismantled after use, and has no requirements for the installation position. It solves the safety risks of oblique upward operations inside the blades and can be widely used for the maintenance of blades of various types of machines. It not only saves time and blade operation and maintenance costs, but also saves staff physical strength, eliminating the safety hazards of personnel in oblique upward blade maintenance work.

[0012] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a prefabricated component for internal anchoring of an obliquely upward blade according to the present invention.

[0014] Figure 2 It is a schematic diagram of the connection between the prefabricated component and the safety rope of the present invention.

[0015] Figure 3 It is a schematic diagram of the connection between the prefabricated member of the present invention and the rope ladder.

[0016] Figure 4 It is a schematic diagram of the prefabricated parts after bonding according to the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and preferred embodiments.

[0018] An embodiment of a method for manufacturing and applying an inclined upward blade internal anchor point prefabricated component: like Figure 1 As shown, a prefabricated component for internal anchoring of an obliquely upward blade comprises: a hanging portion 1, with bonding portions connected on both sides of the hanging portion, the hanging portion is arc-shaped, and a gap is provided on the bonding portion on the same side, so that the bonding portion is divided into a first fixing portion 2 and a second fixing portion 3, which can avoid the problem of loose bonding on one side and the whole prefabricated component falling off.

[0019] A method for manufacturing an internal anchor point prefabricated component for an oblique upward blade comprises the following steps: S1, select pipe fittings. The pipe fittings used in this embodiment are PVC plastic pipe fittings with a diameter of 100 mm. Pipe fittings with different diameters and materials can be used according to the needs during production, and bag film or demoulding cloth is laid on the surface of the pipe fittings and placed on a flat surface; S2, cut out the glass fiber cloth that meets the process requirements, use a suitable container to weigh it according to the epoxy resin ratio requirements, and then use the resin with a qualified ratio to impregnate the glass fiber cloth. After impregnation, hand-lay the cloth layer on the surface of the pipe fitting, at least four layers of hand-laying, each layer of hand-laying is to ensure that the boundary is flush and closely fits the surface of the pipe fitting, and the bonding surface is hand-laid flat. After hand-laying, lay the release cloth on the outer surface of the glass fiber cloth of the prefabricated part, and heat and cure it; S3, after the curing is completed, the recycling pipes are removed and the periphery of the formed prefabricated parts is marked according to the process drawings (such as Figure 1 The formed prefabricated parts are processed (using a grinder or a cutting machine to repair the surrounding area) to form the hanging part 1 and the bonding part of the prefabricated parts. After the repair is completed, they can be used. When the project is carried out, the remaining materials can be used for on-site production without purchasing other equipment to save costs.

[0020] A method for applying a prefabricated internal anchor point of an obliquely upward blade, comprising the following steps: Before use, you should confirm that the working environment, weather, temperature and humidity meet the working requirements, and clean the oil on the soles of your shoes before entering the blade, and then proceed with the following steps; S1. Workers enter the blade from the wind turbine hub, wearing anti-skid equipment (anti-skid equipment includes anti-skid shoes, anti-skid gloves, etc., and the soles of the shoes slide back and forth close to the blade surface after wearing to test the anti-skid performance of the anti-skid shoes) and safety equipment (safety equipment includes safety belts, safety helmets, double hooks, etc.). Before the operation, anti-collision cotton is installed and fixed at the rear cover of the blade to protect people from slipping. At the same time, one person works and one person guards to ensure that there are people protecting each other at the root of the blade; S2. According to the on-site conditions, clean a clean area to test whether the electric suction cup is secure. At the same time, hang the double hook on the suction cup handle as a fall-proof hanging point. Then, alternately use two electric suction cups at intervals of half a meter to reach the maintenance position inside the blade. Then confirm the bonding position of the prefabricated parts, grind the position, and clean it. S3, use glue gun, first apply a small amount of structural glue to ensure good fluidity of the two-component glue, then add the two glues, and then install the glue mixing nozzle. After mixing with the mixing nozzle, apply the glue to the bonding part of the prefabricated parts, ensuring that the entire bonding surface is coated evenly, with a coating thickness of not less than 5mm, and at least two prefabricated parts are bonded at the bonding position in the above steps, and the height of the two prefabricated parts is consistent and the spacing is appropriate (such as Figure 4As shown, the first preform 5 and the second preform 6 are respectively bonded to the inner surface of the blade 4), as long as the placement of the rope ladder is not affected, and then cured. Generally, it can be initially cured at room temperature for 10 minutes and completely cured after 30 minutes; S4, after the curing is completed, use the hoisting rope to pull the safety rope and rope ladder to the prefabricated part, and tie and fix the safety rope and rope ladder to the hanging part of the prefabricated part. One prefabricated part is tied with the safety rope, and the other prefabricated part is tied with the rope ladder. When fixing, use the two locks of the rope ladder to pass through the two sides of the prefabricated part and connect in the middle of the prefabricated part. When the safety rope is connected to the prefabricated part, the "8" knot should be used at the connection anchor point, and measures should be taken to prevent the knot from falling off. After the safety rope and rope ladder are fixed, they hang naturally, and the contact parts between the prefabricated part and the rope ladder and safety rope should be protected with rope protection covers or rags to prevent rope wear and breakage; S5, test the rope ladder and safety rope. First, draw a line mark on the bottom of the bonding part of the prefabricated part. At the same time, the bottom (at least two people, and the bottom personnel climb to 1m of the rope ladder) and the top personnel enter the rope ladder for test. After the test, observe the displacement of the prefabricated part at the marked line to ensure that there is no displacement. After passing the test, the bottom personnel wear anti-slip and safety equipment as required, and hang on the fall arrester and safety rope, and climb to the designated position for maintenance work; S6, after the maintenance is completed, the top staff will stay and stabilize the position through the electric suction cup (use double hooks to hang on the electric suction cup), untie the rope ladder and safety rope on the prefabricated part, and use the rope to slowly lower the rope ladder. Then the top staff will replace the electric suction cup in turn in the opposite direction, lower the center of gravity, and go down to the rear cover position to exit the inside of the blade.

[0021] The above is only a preferred embodiment of the present invention. Any technician familiar with the profession, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention, still falls within the scope of the technical solution of the present invention.

Claims

1. A prefabricated part for internal anchor points of inclined upward blades, characterized in that: include: A hanging portion (1), with adhesive portions connected to both sides of the hanging portion.

2. The prefabricated component for internal anchor points of inclined upward blades according to claim 1, characterized in that: The hanging part is arc-shaped.

3. The prefabricated component for internal anchor points of inclined upward blades according to claim 1, characterized in that: A gap is provided on the bonding portion on the same side, so that the bonding portion is divided into a first fixing portion (2) and a second fixing portion (3).

4. A method for manufacturing an internal anchor point prefabricated component for an oblique upward blade according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, select pipe fittings, lay bag film on the surface of pipe fittings, and place them on a flat surface; S2, cutting out glass fiber cloth that meets the process requirements, impregnating the glass fiber cloth with resin of qualified proportion, and hand-laying the cloth layer on the surface of the pipe fitting after impregnation. After hand-laying, laying a release cloth on the outer surface of the glass fiber cloth, and heating and curing; S3, after the curing is completed, the pipe fittings are removed and the formed prefabricated parts are processed to form the hanging parts and the bonding parts of the prefabricated parts.

5. The method for manufacturing a prefabricated member for an internal anchor point of an obliquely upward blade according to claim 4, characterized in that: In the step S1, the bag film can be replaced with a release cloth.

6. The method for manufacturing a prefabricated member for an internal anchor point of an obliquely upward blade according to claim 4, characterized in that: In the step S2, at least four layers of glass fiber cloth are laid up by hand.

7. The method for applying the prefabricated internal anchor point of an obliquely upward blade according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, the worker enters the blade from the wind turbine hub, wearing anti-slip and safety equipment; S2, alternately use the electric suction cup to reach the maintenance position inside the blade, then confirm the bonding position of the prefabricated parts and grind the position; S3, using a glue gun to apply glue to the bonding part of the prefabricated part, after applying it evenly, bonding it to the bonding position of the above step, and then curing it; S4, after the curing is completed, the safety rope and the rope ladder are pulled to the prefabricated component using the hoisting rope, and the safety rope and the rope ladder are fixed to the hanging part of the prefabricated component; S5, test the rope ladder and safety rope. First, draw a line mark on the bonding part of the prefabricated part. At the same time, the bottom and top workers enter the rope ladder for test. After the test, observe the displacement of the prefabricated part at the marked line. After passing the test, the bottom workers wear anti-slip and safety equipment as required, and hang on the fall arrester and safety rope, and climb to the designated position for maintenance work; S6, after the maintenance is completed, the top staff stays to stabilize the position through the electric suction cup, removes the rope ladder and safety rope on the prefabricated part, and then the top staff exits the blade through the electric suction cup.

8. The method for applying the prefabricated internal anchor point of an obliquely upward blade according to claim 7, characterized in that: In the step S3, at least two prefabricated parts are bonded, one for connecting the safety rope and the other for hanging the rope ladder.

9. The method for applying the prefabricated internal anchor point of an obliquely upward blade according to claim 7, characterized in that: In the step S4, the contact points between the safety rope, the rope ladder and the prefabricated component are covered with rope protection covers.

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