Girth welding null line connecting device adaptive to taper of tower drum

Abstract

The utility model provides a circular seam welding zero line connecting device adapting to the taper of a tower drum, which comprises a fixed bottom plate, and a left inclined plate and a right inclined plate are symmetrically hinged to the top of the fixed bottom plate; an inclination angle adjusting mechanism is mounted between the left inclined plate and the right inclined plate and the fixed bottom plate; the top end face of the left side inclined plate and the top end face of the right side inclined plate are each provided with a zero line connecting assembly used for supporting a tower drum and connecting a zero line of a welding machine. By adjusting the included angle and the length of a spring of the connecting component, the connecting component can adapt to tower drums of different fan types and any diameter, the contact point can adapt to the taper of the tower drums of different sizes and the radial and axial size fluctuation during rotation of the tower drums, and the graphite block serving as a conducting medium can automatically compensate working abrasion through the spring. The welding quality of tower girth welding is guaranteed, and the quality problems of tower welding zero line connection point heating, tower surface electric arc damage and the like are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the fan tower drum ring seam welding manufacturing technical field, concretely relates to a ring seam welding zero line connecting device adapting to the taper of tower drum. BACKGROUND

[0002] The fan tower drum is the important support structure of the wind generating set, based on the wind energy resource distribution inside the wind field and the overall mechanical property design of the kinetic energy conversion assembly of the wind generating set, the fan tower drum shape is generally provided with certain taper in the axial direction, and the diameter of the tower drum of different models varies greatly. In the tower drum manufacturing process, the fan tower drum is generally divided into multiple sections to be assembled and welded with longitudinal seams, after the sectional manufacturing is completed, the sections are assembled into the whole tower drum, and then the ring seam welding of the tower drum is carried out. At present, the ring seam welding of the tower drum generally adopts the submerged arc welding process, the welding current can reach 750A at the maximum, and the welding speed can reach 30m / h, the welding current is large, and the welding speed is fast. When welding, the tower drum is placed on the roller frame or the roller trolley, the tower drum is driven to rotate at a uniform speed by the roller in the welding process, and the connecting equipment with good profile fitting, wear resistance and conductivity is needed as the surface connecting medium of the welding machine zero line and the tower drum.

[0003] The tower drum manufacturing plant generally adopts the connecting equipment made by the plant to connect the welding machine zero line, the contact point of the connecting equipment is made of bundle-shaped iron wire or graphite rod as the direct contact medium, and the iron wire or graphite rod is connected to the fixed iron plate. The main principle of the equipment is to replace the surface contact with a large number of line contacts to increase the current conductivity. Since the zero line connecting equipment adopts the iron wire or graphite rod as the contact point, the contact area is small, the contact is unstable, and the poor contact is easily caused, and then the quality problems such as heating of the connecting point, arc striking of the connecting point and arc striking of the tower drum surface are caused. UTILITY MODEL CONTENTS

[0004] The utility model wants to solve the problem that in the ring seam welding process of the fan tower drum, the device connecting the tower drum with the welding machine zero line needs to adapt to the diameters and tapers of different tower drums, and also needs to keep the connection contact stability and reliability of the welding machine zero line and the tower drum surface, so as to ensure the stable and reliable current conductivity. In order to solve the above technical problems, the utility model provides the following structure to solve the problems that the current ring seam welding zero line contact device of the fan tower drum needs to adapt to the diameters and tapers of different tower drums, and the connection contact stability and reliability of the welding machine zero line and the tower drum surface.

[0005] In order to realize the above technical features, the utility model is implemented as follows: a ring seam welding zero line connecting device adapting to the taper of tower drum, including the fixed bottom plate, the top of the fixed bottom plate is symmetrically hinged with the left side inclined plate and the right side inclined plate, the left side inclined plate and the right side inclined plate are installed with the inclination angle adjusting mechanism between the fixed bottom plate,

[0006] The top surfaces of the left and right inclined plates are respectively equipped with grounding components for supporting the tower and connecting the welding machine's neutral wire.

[0007] The left and right inclined plates are hinged to the top of the fixed base plate.

[0008] The tilt adjustment mechanism includes an adjusting screw installed on the corresponding left and right inclined plates via threaded transmission. After adjustment is completed, the adjusting screw is locked and fixed by a first locking nut.

[0009] A handle is fixed to the top of the adjusting screw.

[0010] The zero-connection assembly includes bolts installed at the top of the left and right inclined plates via threaded drive. A graphite chamber is slidably mounted on the bolts, and a graphite block is installed inside the graphite chamber. Long springs are fitted on two sets of bolts on one side, and short springs are fitted on two sets of bolts on the other side. The long and short springs are located at the bottom end face of the graphite chamber.

[0011] After the installation length adjustment is completed, the bolts are fixed to the top of the left and right inclined plates by the second locking nut.

[0012] The graphite chamber is assembled from welded iron plates into a rectangular slot box structure. Symmetrical through holes are opened in the middle of the short side of the graphite chamber. Fixing bolts pass through the through holes of the graphite chamber and the through holes of the graphite block, and a third locking nut is installed at the end of the fixing bolt.

[0013] A grounding wire is connected between the fixing bolts on both sides, and the grounding wire is connected to the neutral wire of the welding machine.

[0014] The present invention has the following beneficial effects:

[0015] 1. This device provides a structural design scheme for a welding neutral wire connection device that can adapt to changes in the radial dimensions of the wind turbine tower. Designers can adjust the length of the inclined plate and the size of the spring according to the actual working conditions to adapt to various spatial environments such as roller frames and trolleys.

[0016] 2. This device can adapt to different tower diameters by adjusting the angle of the inclined plate by adjusting the screw.

[0017] 3. To ensure current conductivity, this device uses graphite blocks as the contact surface, which can be well adapted to the shape of the tower surface.

[0018] 4. The neutral wire connection component of this device can automatically adjust the deformation of the spring to adapt to the radial and axial dimensional fluctuations when the tower rotates, and automatically compensate for the wear of the graphite block.

[0019] 5. This device has low manufacturing technology requirements, is universally applicable, and can be processed and produced by tower manufacturers themselves, with virtually no technical barriers.

[0020] 6. The parts of this device are low in cost and easy to replace.

[0021] 7. This device has a stable structure, with few parts connected to the neutral wire, reducing the probability of structural problems; the working structure has an independent repeating mechanism design, which substitutes for each other without affecting each other, resulting in high system stability. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is an example diagram of the design scheme of this utility model patent.

[0024] Figure 2 This is the main view for the use case corresponding to this example.

[0025] Figure 3 This is a side view of the usage scenario corresponding to this example.

[0026] Figure 4 This is a schematic diagram of the present invention.

[0027] In the diagram: 1. Adjusting screw; 2. Graphite block; 3. Graphite chamber; 4. Fixing bolt; 5. Long spring; 6. Short spring; 7. Second locking nut; 8. Left side inclined plate; 9. First locking nut; 10. Third locking nut; 11. Fixing base plate; 12. Hinge; 13. Right side inclined plate; 14. Bolt. Detailed Implementation

[0028] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0029] See Figures 1-4 A neutral wire connection device for circumferential welding adapted to the taper of a tower includes a fixed base plate 11. A left inclined plate 8 and a right inclined plate 13 are symmetrically hinged to the top of the fixed base plate 11. An angle adjustment mechanism is installed between the left inclined plate 8 and the right inclined plate 13 and the fixed base plate 11. Neutral connection components for supporting the tower and connecting the welding machine's neutral wire are respectively installed on the top surfaces of the left inclined plate 8 and the right inclined plate 13. By employing the above-mentioned connection device, the tilt angle of the left inclined plate 8 and the right inclined plate 13 can be easily adjusted via the angle adjustment mechanism, thereby adjusting the support height of the neutral connection components. This ensures reliable contact between the neutral connection components and the outer surface of the tower, ultimately achieving a reliable connection between the tower and the welding machine's neutral wire.

[0030] Furthermore, the left inclined plate 8 and the right inclined plate 13 are hinged to the top of the fixed base plate 11 via hinge 12. The hinge 12 ensures that the left inclined plate 8 and the right inclined plate 13 can rotate smoothly, thereby facilitating the adjustment of the support angle of the left inclined plate 8 and the right inclined plate 13, and thus adapting to the welding operations of towers with different structural dimensions.

[0031] Furthermore, the tilt adjustment mechanism includes an adjusting screw 1 installed on the corresponding left inclined plate 8 and right inclined plate 13 via threaded transmission. After adjustment, the adjusting screw 1 is locked and fixed by the first locking nut 9. This tilt adjustment mechanism can be used to adjust the tilt angle of the left inclined plate 8 and right inclined plate 13. Specifically, by rotating the adjusting screw 1, the left inclined plate 8 and right inclined plate 13 are rotated around the hinge 12, thereby adjusting their tilt angle. After adjustment, the first locking nut 9 is used to lock and fix them. This invention, through the included angle of the tilt adjustment mechanism and the spring length of the connecting component, can adapt to towers of any diameter for different wind turbine models. The contact point can adapt to different tower taper sizes and radial and axial dimensional fluctuations during tower rotation. The graphite block, as the conductive medium, can automatically compensate for wear through the spring, ensuring the welding quality of the tower circumferential weld and avoiding quality problems such as overheating at the tower welding neutral connection point and arc damage to the tower surface.

[0032] Furthermore, a handle is fixed to the top of the adjusting screw 1. This handle facilitates the rotation of the adjusting screw 1, thereby adjusting its support length.

[0033] Furthermore, the neutral connection assembly includes bolts 14 threadedly mounted on the tops of the left inclined plate 8 and the right inclined plate 13. A graphite chamber 3 is slidably mounted on the bolts 14, and a graphite block 2 is installed inside the graphite chamber 3. Two sets of bolts 14 on one side are fitted with long springs 5, and two sets of bolts 14 on the other side are fitted with short springs 6. The long springs 5 ​​and short springs 6 are located at the bottom end face of the graphite chamber 3. This neutral connection assembly ensures reliable contact and conductivity between the graphite block 2 and the outer wall of the wind turbine tower, thereby achieving a reliable connection with the welding machine's neutral wire. During operation, the long springs 5 ​​and short springs 6 provide flexible support to the graphite chamber 3, ensuring that the graphite block 2 remains in contact with the tower.

[0034] Furthermore, after the installation length adjustment is completed, the bolt 14 is fixed to the top of the left inclined plate 8 and the right inclined plate 13 by the second locking nut 7. The second locking nut 7 mentioned above can be used to reliably install the bolt 14.

[0035] Furthermore, the graphite chamber 3 is constructed from welded iron plates into a rectangular slotted box structure. Symmetrical through holes are formed in the middle of the short side of the graphite chamber 3. Fixing bolts 4 pass through the through holes of the graphite chamber 3 and the graphite block 2, and a third locking nut 10 is installed at the end of each fixing bolt 4. The graphite chamber 3 reliably secures the graphite block 2 and ensures reliable communication between the graphite block 2 and the graphite chamber 3.

[0036] Furthermore, a grounding connection wire is connected between the fixing bolts 4 on both sides, and the grounding connection wire is connected to the welding machine's neutral wire. This grounding connection wire ensures a reliable connection between the tower and the welding machine's neutral wire.

[0037] The specific working process and principle of this utility model are as follows:

[0038] like Figure 2 , Figure 3 As shown, before use, the second locking nut 7 should be tightened first to give the long spring 5 and the short spring 6 a certain amount of pre-compression so that the graphite block 2 basically conforms to the taper of the tower and is parallel to the generatrix of the tower. Then, rotate the adjusting screw 1 to adjust the left inclined plate 8 and the right inclined plate 13 to a suitable height so that the graphite block 2 fits against the surface of the tower. Continue to rotate the adjusting screw 1 to apply a suitable pressure to the graphite block, and then tighten the first locking nut 9.

[0039] During the tower welding process, the tower is connected to the welding machine neutral line through graphite block 2, graphite chamber 3, and grounding connection line, thereby ensuring the normal welding process of the tower.

[0040] When the tower rotates, the radial and axial dimensions are uneven. The long spring 5 and the short spring 6 will continuously press the graphite block 2 to keep the working surface of the graphite block adapting to the dimensional fluctuations of the tower and making corresponding undulations.

[0041] When the working surface of the graphite block 2 is worn, the long spring 5 and the short spring 6 will continuously press the graphite block 2 to fit against the surface of the tower.

[0042] like Figure 4 As shown, the design logic of this utility model is as follows: Figure 4 As shown, the included angle of the clamping slant plate is essentially adjusted by a set of linkage mechanisms. The position and height of the slider are adjusted by adjusting the included angle of the slant plate. The connecting component can achieve both axial height adjustment and tangential posture adjustment through two pairs of long springs 5 ​​and short springs 6.

Claims

1. A circumferential welded neutral wire connection device adapted to the taper of a tower, characterized in that, Includes a fixed base plate (11), the top of which is symmetrically hinged with a left inclined plate (8) and a right inclined plate (13); an angle adjustment mechanism is installed between the left inclined plate (8) and the right inclined plate (13) and the fixed base plate (11); The top surfaces of the left inclined plate (8) and the right inclined plate (13) are respectively equipped with grounding components for supporting the tower and connecting the welding machine's neutral wire.

2. The circumferential welded neutral wire connection device adapted to the taper of the tower as described in claim 1, characterized in that: The left inclined plate (8) and the right inclined plate (13) are hinged to the top of the fixed base plate (11) via hinges (12).

3. The circumferential welded neutral wire connection device adapting to the taper of a tower as described in claim 1, characterized in that: The tilt adjustment mechanism includes an adjusting screw (1) installed on the corresponding left inclined plate (8) and right inclined plate (13) via a threaded drive. After adjustment, the adjusting screw (1) is locked and fixed by a first locking nut (9).

4. The circumferential welded neutral wire connection device adapting to the taper of the tower as described in claim 3, characterized in that: A handle is fixed to the top of the adjusting screw (1).

5. The circumferential welded neutral wire connection device adapting to the taper of a tower as described in claim 3, characterized in that: The zero-connection assembly includes bolts (14) installed on the top of the left inclined plate (8) and the right inclined plate (13) via threaded drive. A graphite chamber (3) is slidably installed on the bolts (14), and a graphite block (2) is installed inside the graphite chamber (3). Long springs (5) are fitted on two sets of bolts (14) on one side, and short springs (6) are fitted on two sets of bolts (14) on the other side. The long springs (5) and short springs (6) are located on the bottom end face of the graphite chamber (3).

6. The circumferential welded neutral wire connection device adapting to the taper of a tower as described in claim 5, characterized in that: After the installation length adjustment is completed, the bolt (14) is fixed to the top of the left inclined plate (8) and the right inclined plate (13) by the second locking nut (7).

7. The circumferential welded neutral wire connection device adapting to the taper of a tower as described in claim 5, characterized in that: The graphite chamber (3) is assembled from iron plates into a rectangular slot box structure. The graphite chamber (3) has symmetrical through holes in the middle of its short side. The fixing bolt (4) passes through the through holes of the graphite chamber (3) and the through holes of the graphite block (2), and the end of the fixing bolt (4) is equipped with a third locking nut (10).

8. The circumferential welded neutral wire connection device adapted to the taper of the tower as described in claim 7, characterized in that: A grounding connection line is connected between the fixing bolts (4) on both sides, and the grounding connection line is connected to the neutral line of the welding machine.

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