Maintenance and replacement auxiliary device for iron core of medium-and-large-sized dry-type transformer in wind power tower drum

Abstract

The utility model discloses an auxiliary device for maintaining and replacing iron cores of medium and large dry type transformers in a wind power tower drum, which is used in the wind power tower drum and comprises a stacking platform and an in-place trolley which are of detachable structures. The size and the weight of the maximum part after being disassembled meet the requirement that the wind power tower drum is hoisted in and out of the door opening; the stacking table is used for assembling the transformer iron core on the stacking table and driving the iron core to turn over by 90 degrees to be upright and keep a certain distance from the ground after assembling is completed; the two in-place vehicles are used for being inserted into the bottom of the vertical iron core and then driving the iron core to move; the auxiliary device further comprises a binding band, and the binding band is used for binding the iron core and the stacking table or binding the iron core and the in-place trolley. A plurality of tests prove that the maintenance and the replacement of the iron core of the large and medium-sized dry-type transformer can be smoothly operated through the overturning platform and the in-place vehicle.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of wind power tower cylinder inside middle large dry-type transformer core maintenance, replacement auxiliary device. BACKGROUND

[0002] With the progress of new energy wind power generation technology, the number and single machine capacity of wind driven generators have been greatly improved, and the capacity of the dry-type transformers matched with them has developed from several hundred KVA to 15000 KVA and other middle large dry-type transformers. Consequently, the volume and weight are also getting larger and larger. The weight of a single core with an outer dimension of 4200mm×1400mm×3000mm (length×width×height) is about 12 tons. The door opening of a general wind power tower cylinder is about 5100mm high from the ground, the width of the door opening is 1150mm, the height is 2300mm, the hoist installed inside is 2 tons, and the installation site range in the tower cylinder is between ￠4500mm and ￠7100mm. The large weight and volume of the middle large dry-type transformer core in the wind power tower cylinder and the environment thereof cause great difficulty in its maintenance and replacement. The present project aims to provide a solution to this problem. SUMMARY

[0003] The utility model aims to provide a kind of wind power tower cylinder inside middle large dry-type transformer core maintenance, replacement auxiliary device, to provide solution for wind power tower cylinder inside middle large dry-type transformer core maintenance, replacement.

[0004] The utility model aims to realize by the following technical scheme: a kind of wind power tower cylinder inside middle large dry-type transformer core maintenance, replacement auxiliary device, the auxiliary device is used in the wind power tower cylinder, including stacking platform and in situ car, they are all used detachable structure, and after disassembling, the maximum component size and weight all meet the requirement of being hoisted into or out of the wind power tower cylinder by door opening (general door opening 1150mm×2300mm, the hoist installed inside is 2 tons in specification);

[0005] The stacking platform is used for the transformer core to be assembled thereon, and after completing assembly, the iron core is turned over by 90 degrees and stands upright and keeps a certain distance from the ground;

[0006] The in situ car is two, for inserting the bottom of the iron core that stands upright and then driving the iron core to move;

[0007] The auxiliary device further includes a bandage, and the bandage is used to bind the iron core with the stacking platform or the in situ car.

[0008] The on-site vehicle comprises a moving frame, a tank, a jack, a lifting platform and a fixing frame; the tank is arranged at the bottom of the moving frame and is used to drive the moving frame to move; the lifting platform and the jack are arranged on the moving frame; the lifting platform is driven by the jack to move horizontally; the fixing frame is used to prevent the iron core standing on the on-site vehicle from falling down and is vertically fixed at one end of the lifting platform; a matched guiding and limiting structure is further arranged between the lifting platform and the moving frame to guide the lifting movement of the lifting platform and avoid displacement of the lifting platform.

[0009] As a preferred solution, the upper end of the jack of the on-site vehicle extends into the interior of the lifting platform buckled in the inner cavity of the moving frame and abuts against the inner side of the tabletop of the lifting platform; the two side walls of the moving frame are in close contact with the two side walls of the lifting platform to guide the lifting movement of the lifting platform.

[0010] A loose bolt is further arranged on the moving frame; after the lifting platform is buckled into the inner cavity of the moving frame, the lifting platform is just sleeved on the loose bolt through the limiting holes at both ends to limit the lifting platform and avoid displacement of the lifting platform.

[0011] The on-site vehicle further comprises a locking nut used to cooperate with the loose bolt to lock the position of the lifting platform.

[0012] As a preferred solution, a plurality of openings for passing through a band are longitudinally arranged on the fixing frame.

[0013] As a preferred solution, the stacking table comprises a base, a hydraulic oil cylinder, a turnover table and a supporting leg.

[0014] The turnover table is arranged above the base and is hingedly connected to the rear end of the base through a pin shaft; the hydraulic oil cylinder is arranged between the base and the turnover table and is hingedly connected to the base at one end and to the turnover table at the other end to drive the turnover table to turn over; the supporting leg is L-shaped and is installed at the rear end of the turnover table to support the turned-over iron core at the bottom.

[0015] As a preferred solution, the supporting leg comprises a center rod, a supporting shaft and a supporting palm; the supporting palm is welded to the outer side of the rear end of the supporting shaft; the center rod passes through the inside of the supporting shaft from the rear end to the front end and is provided with a thread at the front end; the rear end of the center rod is completely inserted into the supporting shaft and is in abutting contact with the stepped surface of the stepped hole of the rear end of the supporting shaft through the shoulder at the rear end of the center rod; a hole is further arranged in the middle of the rear end surface of the center rod to facilitate rotation of the center rod.

[0016] Two installation blocks are welded on the two sides of the intermediate position of the back end of the turnover platform, two support legs are respectively connected with the installation blocks through the center rods of the support legs at the front ends of the center rods in a threaded mode, and the positioning of the support arms can be realized by rotating the center rods to clamp the support arms between the center rods and the installation blocks.

[0017] The turnover platform comprises a middle beam, cross beams and core column beams, the four cross beams are transversely installed at the two ends of the middle beam by bolts to form a "H" shaped frame structure with a slightly protruding head at the lower end, the three core column beams are installed on the frame structure in a longitudinal mode according to the spacing of the iron core columns by bolts, the front end and the rear end of the middle beam are provided with shaft holes, the slightly protruding head at the lower end of the middle beam is inserted into a pair of hinge lugs protrudingly arranged at the rear end of the base, and then is connected in a hinged mode through a pin shaft, the rear end of the hydraulic oil cylinder is hinged to the base through a pin shaft, and the front end of the middle beam is connected in a hinged mode with the shaft hole at the front end of the middle beam through a pin shaft.

[0018] Beneficial effects:

[0019] At present, the auxiliary device for the maintenance and replacement of the dry-type transformer in the wind power tower is only suitable for the replacement of some small parts, such as coils with a weight of several hundred kilograms, and the maintenance and replacement of the medium and large dry-type transformer iron core (single iron core with a weight of several tons) in the wind power tower cannot be operated, through many times of test verification, the turnover platform and the positioning vehicle of the utility model can smoothly operate the maintenance and replacement of the medium and large dry-type transformer iron core, and in addition, the turnover platform and the positioning vehicle of the utility model also have the characteristics of simple structure, quick disassembly and assembly, convenient transportation and safe use. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the layout schematic diagram of the tower and the auxiliary device to which the utility model is applied;

[0021] Figure 2 is the schematic diagram of the utility model when the iron core is stacked;

[0022] Figure 3 is the local enlarged view of the utility model;

[0023] Figure 4 is the installation structure schematic diagram of the support leg;

[0024] Figure 5 is the schematic diagram of the utility model when the iron core is turned over and stands up;

[0025] Figure 6 is the schematic diagram of the utility model before the iron core is moved;

[0026] Figure 7 is Figure 5 the enlarged view of the middle I part;

[0027] Figure 8 It is a cross-sectional view of the in-place vehicle of the utility model;

[0028] Figure 9 It is a schematic diagram of the utility model after the iron core moves;

[0029] Figure 10 This is a schematic diagram of the iron core when it is installed in place. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0031] The door opening of the wind turbine tower used in the auxiliary device of this embodiment is about 5100mm above the ground, the width of the door opening is 1150mm, the height is 2300mm, the hoist installed inside has a lifting capacity of 2 tons, and the available assembly area in the tower is about ￠7100mm. It can be seen that the stacking and positioning of the 8-ton dry-type transformer core must be completed in the tower. Therefore, the stacking platform 1 and the positioning vehicle 2 of this embodiment need to be used in the wind turbine tower. Figure 1 shown.

[0032] First, a 2-ton hoist is used to gradually hoist the disassembled core, stacking platform, and positioning vehicle components into the tower. Stacking platform 1 is then installed and fixed at the designated location. Stacking platform 1 is used to assemble the core and, after assembly, flips the core from a horizontal position to a vertical position. This type of stacking platform is typically used in the assembly phase of core production lines. When used in this utility model, the limitations of the application scenario must be considered.

[0033] In addition, considering the need for quick disassembly and assembly of the utility model, the stacking table of the utility model is recommended to be designed as follows:

[0034] like Figure 1 As shown, the stacking platform 1 comprises a base 11, a hydraulic cylinder 12, a turning platform 13, and two support legs 14. The turning platform 13 is mounted above the base 11, with its rear end hinged to the rear end of the base 11 via a pin. The hydraulic cylinder 12 is positioned between the two, with one end hinged to the base 11 via a pin and the other end hinged to the turning platform 13 via a pin, driving the turning platform 13. The two support legs 14 are mounted at the lower end of the turning platform 13 and are L-shaped and rotatable. Figure 1 、 2 The middle support leg 14 is in a horizontal state, which is convenient for assembling the core. When it is rotated to a vertical state, it can support the flipped core 3 at the bottom. Figure 5 、 6 , as shown in 9.

[0035] Figure 1 18 is a top column located at the front end of the base 11.Figure 5 The middle beam 131 and the cross beam 132 and the core column beam 133 together form the turnover table 13. The turnover table 13 is connected to the base 11 through the hydraulic oil cylinder 12. The specific connection mode is shown in Figure 3 、 5 It can be seen that the four cross beams 132 are transversely installed at the two ends of the middle beam 131 through bolts, forming a "H" shaped frame structure with the lower end slightly protruding. The three core column beams 133 are longitudinally installed on the frame according to the spacing of the core columns of the iron core through bolts, and each core column beam 133 is fixed with a plurality of auxiliary support seats 134. In addition, limit switches are installed at both ends of the turnover table 13 to control the turning angle, which are not specially marked in this embodiment.

[0036] The specific connection mode of the turnover table 13, the base 11 and the hydraulic oil cylinder 12 is as follows: the front and rear ends of the middle beam 131 are provided with shaft holes, the lower end slightly protruding part is inserted into a pair of hinge ears 111 protrudingly arranged at the rear end of the base 11, as shown in Figure 3 , and then connected in a hinged manner through a pin shaft. The rear end of the hydraulic oil cylinder 12 is hinged with the base 11, and the front end is hinged with the shaft hole at the front end of the middle beam 131 through a pin shaft. Please refer to Figure 1 .

[0037] The specific connection mode of the two support legs 14 is shown in Figure 3 . A mounting block 17 is welded on each of the cross beams 132 on both sides of the middle core column beam, and the two support legs 14 are respectively threadedly connected to the two mounting blocks 17. The specific connection structure is shown in Figure 4 (only the lower half of the mounting block 17 and the support leg 14 is cut) : the inside of the mounting block 17 is provided with a through hole with a small front part and a large rear part, and the small front hole is provided with a threaded structure. The support leg 14 includes a center rod 141, a support shaft 142 and a support palm 143, the support palm 143 is welded on the outer side of the rear end of the support shaft 142, the center rod 141 passes through the inside of the support shaft 142 from the rear end, and the front end is provided with a thread, the rear end completely enters the support shaft 142, and the rear end surface is provided with an internal hexagonal opening 1411 in the middle part, which is convenient for rotating the center rod 141. The entire support leg 14 is threadedly connected to the mounting block 17 through the front end of the center rod 141, the front end of the support shaft 142 extends into the mounting block 17, and the transition surface of the through hole of the mounting block 17 is in abutting structure, and the rotation of the center rod 141 can clamp the support shaft 142 to realize the positioning of the support palm 143.

[0038] After the core 3 is stacked on the turnover table 13 according to the core stacking process requirements, two supporting legs 14 are respectively rotated upwards to abut against the bottom of the core 3, and then the three core columns of the core 3 are bound firmly with the three core column beams 133 by using the binding belt 4, so as to ensure that the core 4 does not fall, bend, tilt and the like during the turnover, thereby affecting the product quality.

[0039] The turnover switch is started, the turnover table 13 holds the whole core 3 and slowly turns over from horizontal upwards under the action of the hydraulic oil cylinder 12, when the turnover table 13 touches the turnover limit switch, at this time, the central axis of the core 3 is perpendicular to the horizontal plane, the turnover is completed vertically, as shown in Figure 5 .

[0040] After the assembly of the stacking table is completed, the assembly of the positioning vehicle 2 should be further completed at the specified position in the tower drum before the core 3 is stacked.

[0041] As shown in Figure 1 , 2 , four carrying tanks 21 are respectively installed at two ends of the bottom of two moving frames 22, the moving frames 22 are supported and moved. As shown in Figure 8 , a jack 23 is fixed at each end of the inner bottom surface of each moving frame 22 by using a flange, the upper end of the jack 23 extends into the inside of a lifting platform 24 buckled in the inner cavity of the moving frame 21 and abuts against the inner side of the table top of the lifting platform 24, the two side walls of the moving frame 22 are attached to the two side walls of the lifting platform 24, so as to guide the lifting of the lifting platform 24 and ensure that the lifting platform 24 is lifted in parallel. The fixed frame 25 is connected and fixed with the rear end position of the lifting platform 24 by using a bolt, as shown in Figure 2 , a plurality of openings for the binding belt to pass through are arranged longitudinally on the fixed frame 25. As shown in Figure 2 , 7 , the moving frame 22 is also provided with a loose bolt 26, after the lifting platform 24 is buckled into the inner cavity of the moving frame 22, the lifting platform 24 is just sleeved on the loose bolt 26 through the limiting hole at the four corners, so as to limit the position of the lifting platform 24 and avoid displacement. The positioning vehicle 2 also includes a locking nut, which is used to cooperate with the loose bolt 26 to lock the position of the lifting platform 24.

[0042] As shown in Figure 6 , after the core 3 is turned vertically, two positioning vehicles are respectively moved to the two sides of the bottom of the core 3, and the central axes thereof are respectively aligned with the central axes of the core columns on the two sides of the core 3, as shown in Figure 7As shown, the wood board 5 and the square wood 6 are placed in the gap between the iron core 3 and the lifting platform 24 and the fixed frame 25, the fixed frame 25 is close to the iron core 3, the binding belt 4 originally bound on the core column and the core column beam 133 of the iron core 3 is removed, the two side core columns of the iron core 3 are bound with the fixed frame 25 by the binding belt 4, and at the same time, the ratchet of the four jacks 23 (penetrated from the side of the moving frame 22) is shaken, the jacks 23 are upwardly extruded, the lifting platform 24 supports the iron core 3 to horizontally rise, when the bottom is separated from the supporting leg 14 on the stacking table 1, the locking universal bolt 26 is locked to avoid the iron core 3 from shaking and falling when moving. Then the carrying tank car 21 is simultaneously driven, the iron core 3 is slowly moved to the distance of about 2 meters away from the stacking table 1 by the supporting of the positioning car 2, so as to avoid the hindering of the stacking table from falling back and being disassembled, and the like. Figure 9 As shown.

[0043] The falling back switch is started, the stacking table 1 falls back, and then it is disassembled and hoisted out of the tower drum to provide the position for the installation of the iron core 3. The positioning car 2 supports the iron core 3 to move to the designated installation position, and after reaching, the universal bolt 26 is unlocked and then the ratchet of the four jacks 23 is reversely shaken, the jacks 23 are retracted, the lifting platform 23 supports the iron core 3 to slowly descend horizontally until being positioned, as shown. Figure 10 As shown, then the positioning car 1 is disassembled and the parts thereof are hoisted out of the tower drum. Thus, the work of the maintenance and replacement of the dry-type transformer iron core in the wind power tower drum by the stacking table and the positioning car is completed.

Claims

1. An auxiliary device for repairing and replacing the core of medium and large dry-type transformers in wind turbine towers, characterized in that: The auxiliary device is used in the wind turbine tower, including a stacking platform and a positioning vehicle, both of which are detachable structures, and the maximum size and weight of the components after disassembly meet the requirements of hoisting in and out of the wind turbine tower through the door opening; The stacking platform is used to assemble the transformer core thereon, and after the assembly is completed, the core is driven to flip 90 degrees upright and keep a certain distance from the ground; There are two positioning vehicles, which are used to insert into the bottom of the upright iron core and then drive the iron core to move; The auxiliary device further comprises a binding belt, and the binding belt is used to bind the iron core to the stacking platform or to the positioning vehicle.

2. The auxiliary device according to claim 1, characterized in that The positioning vehicle includes a mobile frame, a tank car, a jack, a lifting platform and a fixed frame; the tank car is arranged at the bottom of the mobile frame to drive the mobile frame to move, the lifting platform and the jack are arranged on the mobile frame, and the lifting platform is driven by the jack to move horizontally up and down, and the fixed frame is used to prevent the iron core erected on the positioning vehicle from tipping over, and it is vertically fixed to one end of the lifting platform. A matching guide and limit structure is also provided between the lifting platform and the mobile frame to guide the lifting movement of the lifting platform and prevent it from shifting.

3. The auxiliary device according to claim 2, characterized in that The upper end of the jack of the positioning vehicle extends into the interior of the lifting platform buckled in the inner cavity of the mobile frame and presses against the inner side of its table top. The two side walls of the mobile frame are in contact with the two side walls of the lifting platform to guide the lifting of the lifting platform. The movable frame is also equipped with a movable bolt. After the lifting platform is buckled into the inner cavity of the movable frame, it is just sleeved on the movable bolt through the limiting holes at both ends to limit the lifting platform and prevent it from shifting. The positioning vehicle further comprises a locking nut, and the locking nut is used to cooperate with the movable bolt to lock the position of the lifting platform.

4. The auxiliary device according to claim 3, characterized in that The fixing frame is longitudinally arranged with a plurality of openings for the straps to pass through.

5. The auxiliary device according to claim 1, characterized in that The stacking platform includes a base, a hydraulic cylinder, a turning platform and supporting legs; The turning platform is arranged above the base, and the rear end is hinged to the rear end of the base through a pin shaft. The hydraulic cylinder is arranged between them, with one end hinged to the base through a pin shaft, and the other end hinged to the turning platform through a pin shaft, which is used to drive the turning platform to turn over. The supporting leg is L-shaped and is installed at the rear end of the turning platform to support the turned iron core at the bottom.

6. The auxiliary device according to claim 5, characterized in that The support leg includes a center rod, a support shaft, and a support palm. The support palm is welded to the outer side of the rear end of the support shaft. The center rod passes through the interior of the support shaft from the rear end, and the front end passes through and is provided with a thread. The rear end is completely inserted into the support shaft, and the rear end is formed by the rear end boss and the step surface of the rear end step hole of the support shaft to form an offset structure. The middle part of the rear end surface is also provided with an opening for facilitating the operation of its rotation. A mounting block is welded on both sides of the middle position of the rear end of the turning table, and the two supporting legs are respectively threadedly connected to the mounting block through the front end of the center rod. Rotating the center rod can clamp the support shaft between the center rod and the mounting block to achieve the positioning of the supporting palm.

7. The auxiliary device according to claim 6, characterized in that The turning platform includes a center beam, a cross beam and a core column beam. The four cross beams are transversely installed at both ends of the center beam by bolts to form an "I"-shaped frame structure with the lower end slightly protruding. The three core column beams are longitudinally installed on the frame structure by bolts according to the spacing of the iron core columns. A number of auxiliary support seats are fixed on each of the core column beams. The front and rear ends of the center beam are provided with axial holes, and the part of the lower end slightly protruding is inserted into a pair of hinge ears protruding from the rear end of the base, and then hinged by a pin shaft. The rear end of the hydraulic cylinder is hinged to the base by a pin shaft, and the front end is hinged to the axial hole at the front end of the center beam by a pin shaft.

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