A device and method for removing rust from anchor bolts of fan foundation

Abstract

The present invention relates to the technical field of wind turbine generator system foundation, and in particular to a wind turbine foundation anchor bolt rust removal device and method. The device includes a fixed steel rod, a rust remover container, a round steel cylinder, a steel wire and a steel wire fixing device, wherein: the round steel cylinder is a cylindrical hollow structure with a sealed upper portion and an open lower portion; the fixed steel rod is arranged at the center of the top of the round steel cylinder; the rust remover container is arranged at a non-center of the top of the round steel cylinder; the steel wire fixing device is arranged inside the round steel cylinder, and a plurality of steel wires are arranged on the steel wire fixing device; the fixed steel rod is connected to a handheld electric tool. The mechanical rust removal and the chemical rust removal are fully combined to solve the rust removal problem more efficiently; this rust removal device avoids the manual use of small steel brushes, saves a lot of labor, and saves construction time.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine generator set foundations, and in particular to a device and method for removing rust from wind turbine foundation anchor bolts. Background Art

[0002] The foundation prestressed anchor assembly is mainly used to connect the foundation and tower of wind power towers, and is one of the important components to ensure the safety of the structure. Due to the harsh natural environment conditions of wind power towers, the foundation prestressed anchor bolts exposed to the air are easily corroded, causing safety hazards, so the exposed parts of the foundation prestressed anchor bolts need to be anti-corroded and protected. The prestressed anchor bolts in the foundation of wind power towers are anti-corrosion treated as a whole at the factory, but during the installation process, the Dacromet anti-corrosion coating of the anchor bolts will be damaged when the nuts are tightened, affecting the anti-corrosion effect, reducing safety, and increasing the burden of later maintenance. Wind power fasteners have been in service in the field for a long time, and due to the harsh environment, they will cause several forms of corrosion damage. The corrosion of wind power fasteners will lead to huge equipment maintenance costs and economic losses. Therefore, after the anchor bolts are found to be rusted, they should be derusted as soon as possible and treated with anti-corrosion grease.

[0003] In the rust removal process, manual steel brushes are often used for repeated rubbing and rust removal. As the number of anchor bolts on a wind turbine increases, a single unit has reached more than 200 anchor bolts, resulting in a large amount of work. In addition, manual rust removal may not be thorough in some places. Summary of the invention

[0004] In view of the problems in the prior art of manual rust removal resulting in a large amount of work and incomplete rust removal in some places, the present invention provides a rust removal device and method for wind turbine foundation anchor bolts.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A rust removal device for a fan foundation anchor bolt comprises a fixing steel rod, a rust remover container, a round steel cylinder, a steel wire and a steel wire fixing device, wherein:

[0007] The round steel cylinder is a cylindrical hollow structure with a sealed upper portion and an open lower portion;

[0008] The fixed steel rod is arranged at the center of the top of the round steel cylinder;

[0009] The rust remover container is arranged at a non-center position of the top of the round steel cylinder;

[0010] The steel wire fixing device is arranged inside the round steel cylinder, and a plurality of steel wires are arranged on the steel wire fixing device;

[0011] The fixed steel rod is connected with a handheld electric tool.

[0012] Furthermore, a rust remover hole with a diameter of 2 mm is provided at the connection between the upper surface of the round steel cylinder and the rust remover container.

[0013] Furthermore, a cover is provided on the upper portion of the rust remover container.

[0014] Furthermore, the rust remover container is made of steel or polymer material.

[0015] Furthermore, the diameter of the internal cavity of the round steel cylinder is between 80 mm and 150 mm, and the height of the internal cavity is between 100 mm and 500 mm.

[0016] Furthermore, the wall thickness of the round steel cylinder is between 1 mm and 5 mm.

[0017] Furthermore, the diameter of the fixed steel rod is between 5 mm and 30 mm, and the length is between 100 mm and 300 mm.

[0018] A method for removing rust from a fan foundation anchor bolt, based on the above-mentioned fan foundation anchor bolt rust removal device, comprises the following steps:

[0019] S1: Put the rust remover into the rust remover container;

[0020] S2: Connect the rust removal device and the handheld power tool by fixing the steel rod;

[0021] S3: Put the rust removal device on the anchor bolt and nut gasket;

[0022] S4: Power on the handheld power tool to drive the rust removal device to rotate.

[0023] Furthermore, in step S3, the lower edge of the rust removal device falls entirely onto the bottom flange.

[0024] Furthermore, the handheld electric tool adopts zero grounding protection and the power supply part is insulated.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The round steel cylinder is a cylindrical hollow structure with a sealed upper portion and an open lower portion; the fixed steel rod is arranged at the center of the top of the round steel cylinder; the rust remover container is arranged at a non-center of the top of the round steel cylinder; the steel wire fixing device is arranged inside the round steel cylinder, and a plurality of steel wires are arranged on the steel wire fixing device; the fixed steel rod is connected to a handheld electric tool, which fully combines mechanical rust removal and chemical rust removal to solve the rust removal problem more efficiently; this rust removal device avoids the manual use of small steel brushes, saves a lot of labor, and saves construction time.

[0027] 2. A rust remover hole with a diameter of 2 mm is provided at the connection between the upper surface of the round steel cylinder and the rust remover container for the flow of rust remover. The floating rust on the anchor bolts of the fan foundation is quickly removed by the combined effect of mechanical rust removal and chemical rust removal.

[0028] 3. The diameter of the internal cavity of the round steel cylinder is between 80mm and 150mm, and the height of the internal cavity is between 100mm and 500mm. Ensure that the internal cavity size of the round steel cylinder is larger than the outer diameter of the anchor bolt and nut gasket, and the height of the internal cavity is higher than the height of the anchor bolt exposed from the bottom flange.

[0029] 4. The wall thickness of the round steel cylinder is between 1 mm and 5 mm, ensuring that the outer radius of the round steel cylinder is smaller than the distance from the anchor bolt to the outer surface of the tower.

[0030] 5. The lower edge of the rust removal device falls completely onto the bottom flange to prevent incomplete rust removal.

[0031] 6. The handheld electric tool adopts zero connection protection and the power supply part is insulated to prevent electric shock, ensure safety and is suitable for dry places. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 It is a cross-sectional view of a fan foundation anchor bolt rust removal device and a fan foundation anchor bolt of the present invention;

[0034] Figure 2 It is a cross-sectional view of a rust removal device for a fan foundation anchor bolt of the present invention;

[0035] Figure 3 It is a top view of a fan foundation anchor bolt rust removal device of the present invention;

[0036] In the figure: 1-anchor bolt, 2-nut gasket, 3-bottom flange, 4-tower, 5-handheld power tool, 6-rust removal device, 6-1 fixed steel rod, 6-2 rust remover container, 6-3 round steel cylinder, 6-4 steel wire, 6-5 steel wire fixing device. DETAILED DESCRIPTION

[0037] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0038] The following detailed description is an exemplary description, which is intended to provide further detailed description of the present invention. Unless otherwise specified, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present invention.

[0039] Example 1

[0040] like Figure 1 As shown, the present invention provides a rust removal device for anchor bolts of a wind turbine foundation, and the top of the rust removal device 6 is connected to a handheld electric tool 5. The handheld electric tool 5 drives the rust removal device 6 to rotate after power is turned on.

[0041] In addition to basic insulation, the handheld power tool 5 also adopts zero-connection protection, a metal shell, and an insulating power supply part to prevent electric shock, and is suitable for dry places.

[0042] like Figure 2 and Figure 3 As shown, the rust removal device 6 includes a fixed steel rod 6-1, a rust remover container 6-2, a round steel cylinder 6-3, a steel wire 6-4 and a steel wire fixing device 6-5.

[0043] A fixed steel rod 6-1 is welded to the top of the round steel cylinder 6-3, a rust remover container 6-2 is welded or glued to the top of the round steel cylinder 6-3, a steel wire fixing device 6-5 is glued inside the round steel cylinder 6-3, and a plurality of steel wires 6-4 are buried in the steel wire fixing device 6-5.

[0044] The fixed steel rod 6-1 is made of stainless steel or steel bar, with a diameter between 5mm and 30mm and a length between 100mm and 300mm, which is adjusted according to the distance from the round steel cylinder 6-3.

[0045] Rust remover container 6-2 is a steel container welded on the round steel cylinder 6-3 top, and can also be a plastic container bonded on the round steel cylinder 6-3 top. Round steel cylinder 6-3 upper surface and rust remover container 6-2 junction are provided with a rust remover hole of 2mm in size.

[0046] If the rust remover container 6-2 is a steel container, a cover is provided on the upper part of the rust remover container 6-2, and the interior is filled with rust remover. Under the action of gravity, the rust remover enters the inner cavity of the round steel cylinder 6-3 through the rust remover hole, and contacts and mixes with the steel wire 6-4;

[0047] If the rust remover container 6-2 is a plastic container, the rust remover container 6-2 is filled with rust remover, and the rust remover can be squeezed into the cavity of the round steel cylinder 6-3 by manual extrusion to contact and mix with the steel wire 6-4.

[0048] The steel wire fixture 6-5 is made of a fixing material, which is made of wood, steel or plastic. The fixing material is rectangular, and a number of fixing holes are punched into the fixing material. The steel wire 6-4 is inserted and knotted or otherwise fixed on the back of the fixing material to form the steel wire fixture 6-5. The steel wire fixture 6-5 rolled into a cylinder is placed inside the round steel cylinder 6-3 and bonded by bonding.

[0049] The rust removal method of the rust removal device 6 is to remove rust by combining mechanical rust removal and chemical rust removal. Mechanical rust removal is to remove the surface rust by friction between the steel wire 6-4 and the anchor bolt 1 and the nut gasket 2. Chemical rust removal is a method in which the rust remover in the rust remover container 6-2 flows into the internal cavity of the round steel cylinder 6-3, thereby accelerating the rust removal.

[0050] The internal cavity size of the round steel cylinder 6-3 of the rust removal device 6 is larger than the outer diameter of the anchor bolt and the nut gasket. The outer radius of the round steel cylinder 6-3 is smaller than the distance from the anchor bolt to the outer surface of the tower. The internal cavity diameter of the round steel cylinder 6-3 is between 80mm and 150mm. The round steel cylinder 6-3 is a cylindrical hollow structure with a sealed upper portion and an open lower portion. The wall thickness of the round steel cylinder 6-3 is between 1mm and 5mm. The material is generally Q235B or Q355B.

[0051] The lower edge of the round steel cylinder 6-3 of the rust removal device 6 all falls onto the bottom flange 3 to prevent incomplete rust removal.

[0052] The height of the internal cavity of the round steel cylinder 6 - 3 is higher than the height of the anchor bolt 1 exposed from the bottom flange 3 , and the height of the internal cavity is between 100 mm and 500 mm.

[0053] Example 2

[0054] A method for removing rust from anchor bolts for a fan foundation, based on the rust removal device for anchor bolts for a fan foundation in the above embodiment, comprises the following steps:

[0055] The fixed steel rod 6-1, the rust remover container 6-2, the round steel cylinder 6-3, the steel wire 6-4 and the steel wire fixing device 6-5 in the rust removal device 6 are processed in the factory;

[0056] The steel rod 6-1 and the round steel cylinder 6-3 are fixed by welding, and the rust remover container 6-2 and the round steel cylinder 6-3 are combined by welding or gluing;

[0057] A plurality of steel wires 6-4 are embedded in the steel wire fixing device 6-5, and then placed in the inner cavity of the round steel cylinder 6-3 and bonded to the inner wall of the round steel cylinder;

[0058] The rust removal device 6 is transported as a whole to the project site, and the rust remover is placed in the rust remover container 6-2;

[0059] The handheld electric tool 5 and the rust removal device 6 are assembled by fixing the steel rod 6 - 1 .

[0060] Put the rust removal device 6 onto the anchor bolt 1 and the nut washer 2, and drop it onto the bottom flange 3. Be careful not to touch the tower 4 to prevent damage to the tower wall.

[0061] The handheld electric tool 5 is powered on, and the rust removal device 6 rotates, so that mechanical rust removal and chemical rust removal are fully combined to solve the rust removal problem more efficiently.

[0062] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A rust removal device for wind turbine foundation anchor bolts, characterized in that: It comprises a fixed steel rod (6-1), a rust remover container (6-2), a round steel cylinder (6-3), a steel wire (6-4) and a steel wire fixing device (6-5), wherein: The round steel cylinder (6-3) is a cylindrical hollow structure with a sealed upper portion and an open lower portion. The diameter of the inner cavity of the round steel cylinder (6-3) is between 80 mm and 150 mm, the height of the inner cavity is between 100 mm and 500 mm, and the wall thickness is between 1 mm and 5 mm. The fixed steel rod (6-1) is arranged at the center of the top of the round steel cylinder (6-3); the fixed steel rod (6-1) is connected to a handheld electric tool (5); the fixed steel rod (6-1) has a diameter between 5 mm and 30 mm and a length between 100 mm and 300 mm; The rust remover container (6-2) is arranged at a non-center position of the top of the round steel cylinder (6-3); a rust remover hole with a diameter of 2 mm is arranged at the connection between the upper surface of the round steel cylinder (6-3) and the rust remover container (6-2); a cover is arranged on the upper part of the rust remover container (6-2); and the rust remover container (6-2) is made of steel or a polymer material; The steel wire fixing device (6-5) is arranged inside the round steel cylinder (6-3), and a plurality of steel wires (6-4) are arranged on the steel wire fixing device (6-5).

2. A method for removing rust from a wind turbine foundation anchor bolt, based on the wind turbine foundation anchor bolt rust removal device described in claim 1, characterized in that: The following steps are involved: S1: Put the rust remover into the rust remover container (6-2); S2: Connecting the rust removal device (6) and the handheld electric tool (5) by fixing the steel rod (6-1); S3: Put the rust removal device (6) on the anchor bolt (1) and the nut gasket (2), and the lower edge of the rust removal device (6) falls completely onto the bottom flange (3); S4: The handheld electric tool (5) is powered on to drive the rust removal device (6) to rotate. The handheld electric tool (5) is grounded for protection and the power supply is partially insulated.

Images