Grounding device for rotary welding of wind power tower drum

Abstract

The utility model belongs to the technical field of wind power tower tube welding operation, and particularly relates to a grounding device for rotary welding of a wind power tower tube. The device comprises a metal ring type support, an electric brush, bolts and nuts and the like, the electric brush is mounted on the inner side of the metal ring type support, a grounding wire bar is fixed on the support through a first bolt and nut, and a second bolt and nut penetrates through a flange hole and is rotatably arranged on a wind power tower to form a welding loop. The three groups of electric brushes rotate around the second bolt and nut, so that the grounding cable naturally droops when the tower drum is welded and rotated, the cable is prevented from directly contacting with the surface of the flange, the cable and the flange are protected, the service life is prolonged, and the maintenance cost is reduced. In addition, the metal ring type support adopts a trapezoidal design and is connected with the hasp through the hinge piece, so that opening and closing adjustment is facilitated. Meanwhile, a metal guide cylinder is additionally arranged on the second bolt nut, so that the stability of the grounding device is enhanced.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power tower welding operations, and in particular relates to a grounding device for rotating welding of a wind power tower. Background Art

[0002] Wind turbine tower welding is one of the most important links in wind farm construction. In order to ensure welding quality and efficiency, a stable welding circuit is required during welding. At present, the common practice is to fix the end of the grounding wire to the flange hole of the wind turbine tower by bolt clamps. However, the above method has the following disadvantages in practical applications: (1) When the wind turbine tower is rotated for welding, the grounding wire will twist with the rotation of the tower, further causing the internal wire core of the grounding wire to be not straight. With long-term use and frequent twisting and wear, the insulation layer of the grounding wire will also be damaged, and even the wire core will be broken. This not only shortens the service life of the grounding wire, but also may pose a potential threat to the overall structural safety of the wind turbine tower. (2) When the tower rotates, the grounding wire rubs against the flange surface, which can easily cause damage to the flange surface. This not only affects the aesthetics of the flange, but also may affect its performance, thereby posing a potential hidden danger to the overall structural safety of the entire wind turbine tower.

[0003] Therefore, in view of the problem of the use of grounding wires in wind turbine tower welding operations, it is necessary to design a new grounding wire fixing and protection solution to ensure the service life of the grounding wire and the overall structural safety of the wind turbine tower; at the same time, it also provides a strong guarantee for the safe construction and operation of wind farms. Utility Model Content

[0004] Aiming at the problems existing in the existing welding grounding wire method during the wind power tower welding operation in the background technology, the utility model provides a grounding device for rotating welding of the wind power tower.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a grounding device for rotating welding of a wind turbine tower, comprising a metal ring bracket, a brush is installed on the inner side of the metal ring bracket by screws, a first through hole is arranged on the metal ring bracket, a first bolt and nut fixes the grounding wire row to the metal ring bracket through the first through hole, a second bolt and nut is rotatably arranged on the wind turbine tower through a flange hole, and the grounding wire row contacts the second bolt and nut through the brush to form a welding circuit.

[0006] As a further explanation and limitation of the above technical solution, the metal ring bracket is a trapezoidal plate, and it consists of two parts: an outer eight-shaped plate and a linear plate. One end of the linear plate is hingedly connected to one end of the outer eight-shaped plate through a hinge, and the other ends of the two are connected by a buckle anchor. Second through holes are respectively provided on the two oblique sides of the outer eight-shaped plate and the linear plate. The screws pass through the second through holes to fix the brushes on the metal ring bracket, and the three groups of brushes are radially arranged along the second bolts and nuts.

[0007] As a further supplement to the above technical solution, a metal guide tube is provided on the second bolt and nut, and the metal guide tube is arranged in the flange hole. The bolt of the second bolt and nut passes through the metal guide tube and the metal guide tube is fixed to the wind turbine tower by using its nut. The metal ring bracket is anchored to the metal guide tube by a buckle, and the three groups of brushes are all in contact with the metal guide tube.

[0008] As a further supplementary explanation of the above technical solution, each group of brushes includes at least two axially arranged brushes to ensure a conductive contact surface.

[0009] As a further explanation and limitation of the above technical solution, the buckle includes two parts: a locking member and a locking hook, and the two parts are respectively fixed on the outer eight-shaped plate and the linear flat plate.

[0010] As a further supplementary explanation of the above technical solution, the first through hole is arranged on the outer eight-shaped plate, and is located between the two oblique sides of the outer eight-shaped plate.

[0011] As a further explanation and limitation of the above technical solution, the brush is a conductive block made of any one of electrolytic graphite, impregnated graphite, and metal graphite, and contact arc surfaces and screw holes are respectively provided on two opposite side surfaces of the conductive block. The screws fix the conductive block to the metal ring bracket through the screw holes, and the contact arc surface is in contact with the stud part of the second bolt and nut or the outer wall of the metal guide tube.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. The utility model uses three sets of brushes to rotate around the second bolt nut to make the grounding cable in a natural drooping state when the tower is welded and rotated, avoiding the cable from directly contacting the flange surface, thereby reducing the damage to the cable and flange. This design not only protects the cable and flange, but also extends their service life and reduces maintenance costs.

[0014] 2. The utility model adopts the design of metal ring bracket and brush to ensure good contact between the grounding wire and the flange, thereby improving the grounding efficiency. This design can ensure that the current flows smoothly into the earth and reduce the risk of electrical failure.

[0015] 3. The metal ring bracket in the utility model adopts a trapezoidal design and is connected by hinges and buckles, so that it can be easily opened and closed. This design makes the installation and disassembly process simpler and faster, and improves work efficiency.

[0016] 4. The utility model adds a metal guide tube design on the second bolt and nut, which can ensure good contact between the brush and the metal guide tube, thereby enhancing the stability of the grounding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the grounding device in the utility model;

[0018] Figure 2 This is a structural diagram of the metal ring bracket in the utility model;

[0019] Figure 3 It is the structural diagram of the brush in the utility model;

[0020] Figure 4 This is a schematic diagram of the installation of the grounding wire bar in the utility model;

[0021] Figure 5 This is a reference diagram for the use of the grounding device in the utility model;

[0022] Figure 6 for Figure 5 Enlarged view of part A.

[0023] In the figure: the metal ring bracket is 1, the screw is 2, the brush is 3, the conductive block is 301, the contact arc surface is 302, the screw hole is 303, the buckle is 4, the locking member is 401, the locking hook is 402, the hinge member is 5, the first through hole is 6, the first bolt and nut is 7, the grounding wire row is 8, the wind turbine tower is 9, the flange hole is 10, the second bolt and nut is 11, and the metal guide tube is 12.

[0024] The metal ring bracket includes: an outer eight-shaped plate 101 , a linear flat plate 102 , and a second through hole 103 . DETAILED DESCRIPTION

[0025] In order to further illustrate the technical solution of the utility model, the following Figures 1 to 6 According to the manufacturing process of the grounding device and the on-site implementation, we further illustrate the utility model through two embodiments. Embodiment 1

[0026] As attached Figures 1 to 6As shown, a grounding device for rotating welding of a wind turbine tower comprises a metal ring bracket 1, a brush 3 is installed on the inner side of the metal ring bracket 1 by means of a screw 2, a first through hole 6 is arranged on the metal ring bracket 1, a first bolt and nut 7 fixes a grounding wire row 8 on the metal ring bracket 1 through the first through hole 6, a second bolt and nut 11 is rotatably arranged on the wind turbine tower 9 through a flange hole 10, and the grounding wire row 8 contacts with the second bolt and nut 11 through the brush 3 to form a welding circuit.

[0027] In this embodiment, as shown in the attached Figure 2 As shown, the metal ring bracket 1 is a trapezoidal plate, and it consists of an outer eight-shaped plate 101 and a linear flat plate 102. The first through hole 6 is arranged on the outer eight-shaped plate 101, and it is located between the two oblique sides of the outer eight-shaped plate 101. One end of the linear flat plate 102 is hingedly connected to one end of the outer eight-shaped plate 101 through a hinge 5, and the other ends of the two are anchored by a buckle 4. Second through holes 103 are respectively arranged on the two oblique sides of the outer eight-shaped plate 101 and the linear flat plate 102. The screws 2 pass through the second through holes 103 to fix the brushes 3 on the metal ring bracket 1, and three groups of the brushes 3 are radially arranged along the second bolts and nuts 11, and each group of the brushes 3 includes at least two axially arranged brushes 3, so as to ensure a conductive contact surface.

[0028] Further, as attached Figure 3 As shown, the brush 3 is a conductive block 301 made of any material selected from electrochemical graphite, impregnated graphite, and metal graphite. A contact arc surface 302 and a screw hole 303 are respectively provided on two opposite side surfaces of the conductive block 301. The screw 2 fixes the conductive block 301 on the metal ring bracket 1 through the screw hole 303, and the contact arc surface 302 is in contact with the stud portion of the second bolt nut 11 or the outer wall of the metal guide tube 12.

[0029] Further, as attached Figure 2 As shown, the buckle 4 includes a locking member 401 and a locking hook 402 , and the two parts are fixed on the outer eight-shaped plate 101 and the linear flat plate 102 respectively.

[0030] In this embodiment, the second bolt and nut may also be replaced by a pin to pass through the flange hole to connect the grounding device and the wind power tower, which can also achieve the purpose of this technical transformation. Embodiment 2

[0031] In order to ensure the good conductive contact and stability of the grounding device. Figure 5 and 6As shown, a metal guide tube 12 is provided on the second bolt and nut 11, and the metal guide tube 12 is provided in the flange hole 10. The bolt of the second bolt and nut 11 passes through the metal guide tube 12 and the metal guide tube 12 is fixed to the wind turbine tower 9 by its nut. The metal ring bracket 1 is anchored on the metal guide tube 12 by the buckle 4, and the three groups of brushes 3 are in contact with the metal guide tube 12. When the grounding wire row 8 is fixed on the metal ring bracket 1 by the first bolt and nut 7, the current flows into the brush 3 through the grounding wire row 8. Since the brush 3 is in close contact with the metal guide tube 12, the current can smoothly flow into the wind turbine tower 9 through the metal guide tube 12 and finally into the earth. This design ensures the efficient conductivity and stability of the grounding device.

[0032] It should be noted that the hinge 5 used in the above embodiment is preferably a hinge. At the same time, in order to reduce the production cost and facilitate rapid production on site, in the above embodiment, the brush 3 and the buckle 4 are both purchased parts.

[0033] The above shows and describes the main features and advantages of the utility model. For those skilled in the art, it is obvious that the specific implementation of the utility model is not limited to the details of the above exemplary embodiments, and the creative ideas and design ideas of the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model, which should be equivalent to the protection scope disclosed in the technical solution of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A grounding device for rotating welding of a wind turbine tower, characterized in that: The invention comprises a metal ring bracket (1), a brush (3) is installed on the inner side of the metal ring bracket (1) by means of a screw (2), a first through hole (6) is arranged on the metal ring bracket (1), a first bolt and nut (7) fixes a grounding wire row (8) to the metal ring bracket (1) through the first through hole (6), a second bolt and nut (11) passes through a flange hole (10) and is rotatably arranged on a wind power tower (9), and the grounding wire row (8) contacts the second bolt and nut (11) through the brush (3) to form a welding circuit.

2. A grounding device for rotating welding of a wind turbine tower according to claim 1, characterized in that: The metal ring bracket (1) is a trapezoidal plate, and is composed of two parts: an outer eight-shaped plate (101) and a linear plate (102); one end of the linear plate (102) is hingedly connected to one end of the outer eight-shaped plate (101) via a hinge (5), and the other ends of the two are anchored via a buckle (4); second through holes (103) are respectively provided on the two oblique sides of the outer eight-shaped plate (101) and the linear plate (102); the screws (2) pass through the second through holes (103) to fix the brushes (3) on the metal ring bracket (1), and three groups of the brushes (3) are arranged radially along the second bolts and nuts (11).

3. A grounding device for rotating welding of a wind turbine tower according to claim 2, characterized in that: A metal guide tube (12) is provided on the second bolt and nut (11), the metal guide tube (12) being arranged in the flange hole (10), the bolt of the second bolt and nut (11) passes through the metal guide tube (12) and the nut thereof is used to fix the metal guide tube (12) on the wind turbine tower (9), the metal ring bracket (1) is anchored on the metal guide tube (12) by means of a buckle (4), and the three groups of brushes (3) are all in contact with the metal guide tube (12).

4. A grounding device for rotating welding of a wind turbine tower according to claim 3, characterized in that: Each group of brushes (3) comprises at least two axially arranged brushes (3), thereby ensuring a conductive contact surface.

5. A grounding device for rotating welding of a wind turbine tower according to any one of claims 2 to 4, characterized in that: The buckle (4) comprises two parts: a locking piece (401) and a locking hook (402), and the two parts are respectively fixed on the outer eight-shaped plate (101) and the linear flat plate (102).

6. A grounding device for rotating welding of a wind turbine tower according to claim 5, characterized in that: The first through hole (6) is arranged on the outer eight-shaped plate (101), and is located between two oblique sides of the outer eight-shaped plate (101).

7. A grounding device for rotating welding of a wind turbine tower according to any one of claims 1 to 4 or 6, characterized in that: The brush (3) is a conductive block (301) made of any one of electrochemical graphite, impregnated graphite and metal graphite. A contact arc surface (302) and a screw hole (303) are respectively provided on two opposite side surfaces of the conductive block (301). The screw (2) fixes the conductive block (301) to the metal ring bracket (1) through the screw hole (303), and the contact arc surface (302) contacts the stud portion of the second bolt nut (11) or the outer wall of the metal guide tube (12).

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