A large transformer auxiliary assembly platform

Abstract

The application discloses a large transformer auxiliary assembling platform, which comprises mounting racks, lifting platforms, lifting mechanisms and sleeving mechanisms, two groups of mounting racks are installed on the ground, the two groups of mounting racks are oppositely arranged, a positioning and clamping assembly for an iron core is arranged between the two groups of mounting racks, the positioning and clamping assembly can be lifted, a lifting platform capable of being lifted is arranged on each mounting rack, a lifting mechanism is arranged between the two groups of mounting racks, two ends of the lifting mechanism are installed on the two groups of mounting racks, the lifting mechanism is lifted on the mounting racks, a sleeving mechanism is arranged between the two groups of mounting racks, and windings are sleeved on phase columns through the sleeving mechanism; the laminations on the top of the transformer iron core and upper clamping pieces are lifted, so that the windings can be lifted and disassembled without a derrick, meanwhile, the upper clamping pieces and the laminations are lifted, and after the windings are nested, the laminations and the upper clamping pieces are convenient to install.

Description

Technical Field

[0001] This invention relates to the field of transformer assembly equipment, and more specifically to a large transformer auxiliary assembly platform. Background Technology

[0002] Large transformers are quite tall. After the core laminations are completed, tie rods and clamps are installed on the core laminations to fix them in place and prevent them from spreading out. When assembling the transformer and windings, the upper clamps at the top need to be removed, and the top laminations need to be taken off. Then, the wound windings are placed on the A, B, and C phase columns of the core. Next, the upper core laminations at the top are installed on the core, and then the upper clamps at the top are installed on the core. Finally, the winding leads are installed on the upper clamps. Because the cores of large transformers are quite tall, the construction is difficult for workers. Currently, the assembly of large transformer cores is carried out using an assembly frame. Workers stand on the lifting platform of the assembly frame, and the lifting platform allows workers to adjust the height for transformer assembly.

[0003] The aforementioned assembly rack has significant drawbacks. Disassembled parts can only be placed on the lifting platform. When workers are disassembling, the parts can only be placed on the lifting platform. When assembly is required, the parts on the lifting platform need to be installed onto the iron core, which increases the labor intensity for workers. In addition, the winding sleeve on the phase column requires a gantry crane to slowly align and lift it, which is inefficient. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this invention proposes a large transformer auxiliary assembly platform. The auxiliary components lift the top core and upper clamping parts, and automatically place the windings onto the phase columns of the core, eliminating the need for positioning and assembly by a gantry crane.

[0005] To achieve the above objectives, the present invention provides a solution for a large transformer auxiliary assembly platform, comprising an mounting frame, a lifting platform, a lifting mechanism, and a fitting mechanism. Two sets of mounting frames are installed on the ground, arranged opposite to each other. A positioning and clamping assembly for the iron core is provided between the two sets of mounting frames. The positioning and clamping assembly is capable of lifting and lowering. A lifting platform capable of lifting and lowering is provided on each set of mounting frames. A lifting mechanism is provided between the two sets of mounting frames, with both ends mounted on the two sets of mounting frames. The lifting mechanism lifts and lowers on the mounting frames. A fitting mechanism is provided on both sets of mounting frames to fit the winding onto the phase column. The lifting mechanism is divided into an upper clamp lifting assembly and a stacked plate lifting assembly. The upper clamp lifting assembly is located above the stacked plate lifting assembly. Both the upper clamp lifting assembly and the stacked plate lifting assembly are slidably engaged with the mounting frame. The upper clamp lifting assembly and the stacked plate lifting assembly are raised and lowered on the mounting frame to lift the upper clamp and the upper iron core stacked plates respectively. The assembly includes a translation frame, a positioning component, and a bracket. There are two translation frames arranged opposite each other, and the two translation frames slide in contact with the ground. A movable support base is provided at the bottom of the translation frame. Multiple brackets are installed side by side on each translation frame, and a positioning component is provided above each bracket. The positioning component positions the outer circumference of the winding.

[0006] Preferably, the upper clamping member lifting assembly includes a support crossbar, an upper clamping member lifting plate, and a limiting block. A first lifting assembly is provided between the two ends of the support crossbar and the mounting frame. Two sets of sliding sleeves are installed on the support crossbar. An L-shaped upper clamping member lifting plate is provided between each set of sliding sleeves and the support crossbar. A first hydraulic cylinder is provided between the sliding sleeves and the support crossbar to drive the sliding sleeves to move horizontally. A limiting block that can elastically lift and lower is provided between the two sets of sliding sleeves, and the limiting block abuts against the inner side of the upper clamping member.

[0007] Preferably, the stacked lamination lifting assembly includes a lifting seat, clamping arms, and lifting rods. A mounting plate connects every two sets of mounting frames, and a lifting seat is mounted on the mounting plate. A second lifting assembly is positioned between the lifting seat and the mounting frame. Two opposing clamping arms are mounted on the lifting seat, and the clamping arms rotatably engage with the lifting seat. A motor is positioned between each clamping arm and the lifting seat, driving the clamping arm to rotate. Two lifting rods are mounted on each clamping arm, and the lifting rods on the clamping arms are coaxial. When the clamping arms are closed, the two lifting rods engage. A movable collar is mounted on the lifting rod of one clamping arm, and a spring is fitted onto the lifting rod, with the spring pressing against the back of the clamping plate. Clamping plates are fixed to the two movable collars. A retaining plate is fixed to the lifting rod of the other clamping arm. The spring pushes the clamping plate towards the retaining plate, and the clamping plate and retaining plate clamp the upper iron core laminations.

[0008] Preferably, a groove is provided on the translation frame for the bracket to extend into, and the bracket extends and retracts along the translation frame. A third hydraulic cylinder is provided between the bracket and the translation frame to achieve the extension and retraction of the bracket. A fixed frame is fixed above the translation frame, and a positioning component located above the bracket is installed on the fixed frame. The positioning component consists of multiple sets, which are coaxially arranged vertically and slidably engage with the fixed frame. The positioning component extends and retracts along the fixed frame. The positioning component is a semi-circular ring, and a positioning block is installed on the inner wall of the semi-circular ring. The top surface of each positioning block is a downwardly inclined slope, and one end of the positioning block extends into the inner wall of the semi-circular ring. The positioning block extends and retracts along the semi-circular ring. A linkage plate is provided above the semi-circular ring, and a fourth hydraulic cylinder is provided between the linkage plate and the semi-circular ring. A vertically arranged lifting rod is installed on the linkage plate, which passes through the semi-circular ring. A push-pull rod is hinged between the lifting rod and the tail of the positioning block.

[0009] Preferably, a clearance groove is provided on the ground to allow space for the positioning and clamping assembly. The positioning and clamping assembly clamps the transformer core and moves up and down within the clearance groove. A vertical guide rail is installed on the side wall of the clearance groove, and a slide is mounted on the guide rail. The slide is mounted on the outer wall of the positioning and clamping assembly. A third lifting assembly is provided between the positioning and clamping assembly and the clearance groove. The positioning and clamping assembly includes a placement plate, a limiting inclined plate, and a swinging pressure rod. Multiple sets of opposing limiting inclined plates are installed on the placement plate to limit the base of the transformer core. Two sets of swinging pressure rods are installed on the placement plate, located on both sides of the core. The two ends of the swinging pressure rods are hinged to the placement plate via swing arms. A fifth hydraulic cylinder is provided between the swing arms and the placement plate, and the swinging pressure rods press against the base of the core.

[0010] Preferably, two swing arms are hinged to the top of each fixed frame, and a clamping rod is fixed to the other end of the two swing arms. The clamping rod is pressed against the top of the winding by swinging. A push hydraulic cylinder is provided between the fixed frame and the swing arms. The swing of the swing arms is achieved by the extension and retraction of the push hydraulic cylinder.

[0011] Compared with the prior art, the advantages of the present invention are as follows: The laminations and upper clamps at the top of the transformer core are lifted, so that there is no need for a gantry crane to lift and disassemble them. At the same time, the upper clamps and laminations are lifted, which makes it easier to install the laminations and upper clamps after the winding is nested. The core phase column and winding are nested automatically, eliminating the need for hoisting and alignment by a gantry crane. The positioning and clamping assembly clamps and positions the iron core, which facilitates the separation of the upper clamp and the laminations. At the same time, the positioning and clamping assembly can be raised and lowered to facilitate nesting with the phase column and winding. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention.

[0013] Figure 2 This is a schematic diagram of the disassembly and lifting mechanism of the present invention.

[0014] Figure 3 This is a top view of the disassembly and lifting mechanism of the present invention.

[0015] Figure 4 This is a schematic diagram of the mounting bracket and single-sided fitting mechanism of the present invention.

[0016] Figure 5 This is a schematic diagram of the single-sided fitting mechanism of the present invention.

[0017] Figure 6 This is a cross-sectional view of the positioning component of the present invention.

[0018] Figure 7 This is a schematic diagram showing the sliding fit between the positioning component and the fixing frame of the present invention.

[0019] Figure 8 This is a cross-sectional view of the translation frame of the present invention.

[0020] Figure 9 This is a schematic diagram of the placement plate on the positioning and clamping assembly of the present invention. Figure 10 This is a front view of the mounting frame and lifting mechanism of the present invention.

[0021] Figure 11 This is a perspective view of the mounting frame and lifting mechanism of the present invention.

[0022] Figure 12 This is a schematic diagram of the mounting frame and the lifting mechanism after one side of the mounting frame is disassembled according to the present invention.

[0023] Figure 13 This is a schematic diagram of the clamping and lifting assembly of the present invention.

[0024] Figure 14 This is a schematic diagram of the stacked support assembly of the present invention.

[0025] The components include: 1. Mounting frame; 2. Lifting platform; 3. Lifting mechanism; 4. Upper clamp lifting assembly; 5. Support crossbar; 6. First lifting assembly; 7. Sliding sleeve; 8. First hydraulic cylinder; 9. Upper clamp lifting plate; 10. Limiting block; 11. Stacked plate lifting assembly; 12. Lifting seat; 13. Clamping arm; 14. Lifting rod; 15. Mounting plate; 16. Lifting seat; 17. Second lifting assembly; 18. Moving collar; 19. Clamping plate; 20. Abutment plate; 21. Set-fitting mechanism; 22. Translation frame. 3. Groove; 24. Bracket; 25. Third hydraulic cylinder; 26. Fixed frame; 27. Positioning block; 28. Positioning assembly; 29. ​​Linkage plate; 30. Fourth hydraulic cylinder; 31. Lifting rod; 32. Push-pull rod; 33. Moving support seat; 34. Positioning clamping assembly; 35. Placement plate; 36. Limiting inclined plate; 37. Swinging pressure rod; 38. Swing arm; 39. Fifth hydraulic cylinder; 40. Clearance groove; 41. Guide rail; 42. Slide seat; 43. Third lifting assembly; 44. Swing rod; 45. Pressing rod. Detailed Implementation

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] like Figure 1-14 The large transformer auxiliary assembly platform includes a mounting frame 1, a lifting platform 2, a lifting mechanism 3, and a mounting mechanism 21. Two sets of mounting frames 1 are installed on the ground by bolts, with each set of mounting frames 1 consisting of multiple plates of equal height. Columns are welded between the plates to support them.

[0028] A clearance groove 40 is cut into the ground between the two sets of mounting frames 1. A positioning clamping assembly 34 for the iron core is installed in the clearance groove 40. The positioning clamping assembly 34 moves up and down within the clearance groove 40. During winding nesting, the iron core descends on the positioning clamping assembly 34, the winding moves above the iron core, and the positioning clamping assembly 34 rises. In this way, the phase column of the iron core is inserted into the hollow of the winding, completing the nesting of the winding and the iron core. Each set of mounting frames 1 is equipped with a lifting platform 2 that can be raised and lowered. The lifting platform 2 moves up and down on the mounting frame 1, and the operator stands on the lifting platform 2 to perform the lifting. The system allows workers to perform installation and debugging at different heights, making it suitable for assembling large transformers. A vertical column is fixed to the mounting frame 1 by welding, passing through the lifting platform 2. The lifting platform 2 then moves up and down on the column. A vertical lead screw is mounted on the mounting frame 1 via bearings, with its top welded to the motor output shaft. The motor is bolted to the mounting frame 1, and the motor drives the vertical lead screw to rotate. The vertical lead screw passes through the lifting platform, and the vertical lead screw is threaded into the lifting platform. The rotation of the vertical lead screw achieves the raising and lowering of the lifting platform.

[0029] A lifting mechanism 3 is provided between the two sets of mounting frames 1. The two ends of the lifting mechanism 3 are installed on the two sets of mounting frames 1. The lifting mechanism 3 is raised and lowered on the mounting frames 1. The raising and lowering of the lifting mechanism 3 lifts and separates the laminations on the top of the transformer core from the upper clamp, which facilitates the subsequent windings to be fitted onto the phase columns. A fitting mechanism 21 is provided on the two sets of mounting frames 1. The three sets of windings are placed on the fitting mechanism 21. The fitting mechanism 21 moves backward to the top of the core. The core is raised by the positioning clamping component 34. The windings are fitted onto the phase columns by the fitting mechanism 21. Then the fitting mechanism 21 moves forward to be misaligned with the positioning clamping component 34. At the same time, the lifting mechanism 3 descends. The laminations are installed on the top of the core by the workers. Then the upper clamp descends to clamp the laminations of the upper core. At the same time, the bolts are tightened to fix it. This completes the assembly of the transformer core. When the fitting mechanism 21 moves backward, the lifting platform 2 rises and is higher than the fitting mechanism 21. The rising of the lifting platform 2 makes way for the fitting mechanism 2.

[0030] The lifting mechanism 3 is divided into an upper clamp lifting assembly 4 and a lamination lifting assembly 11. The upper clamp lifting assembly 4 is located above the lamination lifting assembly 11. Both the upper clamp lifting assembly 4 and the lamination lifting assembly 11 are slidably engaged with the mounting frame 1. The upper clamp lifting assembly 4 and the lamination lifting assembly 11 move up and down on the mounting frame 1. The upper clamp lifting assembly 4 and the lamination lifting assembly 11 lift the laminations on the top of the iron core and the upper clamp in sequence. During operation, the base of the transformer iron core is placed on the positioning clamping assembly 34, the upper pull rod is connected to the nut on the upper clamp, and the upper clamp lifting assembly 4 lifts the laminations. As component 11 descends, the upper clamping component lifting component 4 rises, lifting the upper clamping component upwards to separate it from the transformer core. Then, the workers separate the upper laminations from the core and place them on the lamination lifting component 11. The lamination lifting component 11 lifts upwards, thus separating the upper laminations at the top of the transformer core from the core. The core descends, and the windings are placed on the phase columns. Then, the lamination lifting component 11 descends, and the workers remove the upper core laminations from the lamination lifting component 11 and install them on the transformer core, thus completing the assembly of the upper core laminations. At the same time, the upper clamping component lifting component 4 descends, installing the upper clamping component on both sides of the upper core laminations. Finally, the upper clamping component is locked to the pull rod with bolts, thus completing the assembly. The assembly 21 includes a translation frame 22, a positioning component 28, and a bracket 24. The translation frame 22 consists of two frames arranged opposite each other, sliding against the ground. A movable support base 33 is located at the bottom of each frame 22. Longitudinal ground rails are bolted to the left and right sides of the ground clearance groove 40. The movable support base 33 moves back and forth on the ground rails, engaging with them for longitudinal movement. A movable lead screw is located above the ground rails, with both ends of the screw mounted on a base via bearings. The base is bolted to both ends of the ground rails. One end of the movable lead screw is welded to a motor (the motor is...). The output shaft of the stepper motor is fixed. The position of the movable support 33 is adjusted by the number of revolutions of the stepper motor, thus realizing the rotation of the movable lead screw. The movable lead screw passes through the movable support 33 and is threadedly engaged with the movable support 33. The rotation of the movable lead screw drives the movable support 33 to move back and forth. Multiple sets of brackets 24 are installed side by side on each translation frame 22. The brackets 24 support the bottom of the winding. A positioning component 28 is set above each bracket 24. The positioning component 28 positions and clamps the outer circumference of the winding. Before the winding is nested, the mounting mechanism 21 is misaligned with the transformer core. When the clamps on the transformer core are aligned with the transformer core, the winding is positioned and clamped. After the laminations at the top of the transformer core are removed, the positioning clamping assembly 34 descends, and the mounting mechanism 21 moves backward to directly above the transformer core. The transformer core is lifted by the positioning clamping assembly 34, and the phase column of the transformer core is inserted into the winding. The mounting mechanism 21 opens and then moves forward to misalign with the transformer core, and then the mounting mechanism 21 closes. The winding consists of a primary winding and a secondary winding nested together. An insulating sleeve is embedded in the primary winding. The winding is lifted onto the bracket 24, and the nesting of the winding and the phase column is completed by lifting the transformer core. Alternatively, the primary coil and secondary coil can be nested sequentially onto the phase column (suitable for situations where the primary and secondary coils are relatively heavy). For extra-large transformers, the insulating sleeve is first lifted onto the bracket to complete the first nesting. After the first nesting is completed, the bracket moves forward and returns to its original position. The primary coil is placed on the bracket, and the extension of the positioning block is adjusted. The positioning block rests against the outer wall of the primary coil to complete the positioning. Then, the translation frame moves backward, and the primary coil is located directly above the phase column of the iron core. The iron core is lifted upward to complete the second nesting. After the nesting is completed, the translation frame opens and moves forward to its original position. The gantry crane places the secondary coil on the bracket, and the positioning block is adjusted so that it rests against the secondary coil. The translation frame moves the secondary coil directly above the transformer iron core. By lifting the transformer iron core, the secondary coil is nested on the phase column.

[0031] The upper clamping component lifting assembly 4 includes a supporting crossbar 5, an upper clamping component lifting plate 9, and a limiting block 10. A first lifting assembly 6 is installed between both ends of the supporting crossbar 5 and the mounting frame 1. Vertical rods are welded to the top of the mounting frame, passing through the supporting crossbar 5. The tops of the two vertical rods are welded to the same fixing plate. The first lifting assembly 6 is welded to both ends of the fixing plate and the supporting crossbar. The first lifting assembly 6 is a hydraulic cylinder that raises and lowers the supporting crossbar 5. The extension and retraction of the first lifting assembly 6 achieves the lifting of the supporting crossbar 5. (Lifting and lowering) Each support crossbar 5 is equipped with two sets of left-right opposing sliding sleeves 7 (i.e., the sliding sleeves 7 have rectangular holes that fit onto the support crossbar 5, and the sliding sleeves 7 move left and right on the support crossbar 5). An L-shaped upper clamping support plate 9 is fixed to each set of sliding sleeves 7 by welding. The upper clamping support plate 9 is used to lift the upper clamping parts of the transformer core. A first hydraulic cylinder 8 that drives the sliding sleeves 7 to move horizontally is fixed between the sliding sleeves 7 and the support crossbar 5 by bolts. The piston rod of the first hydraulic cylinder is fixed to the sliding sleeve 7 by bolts. The cylinder body of the first hydraulic cylinder is fixed to the support crossbar 5 by bolts. The sliding sleeve 7 moves left and right by the extension and retraction of the first hydraulic cylinder. When the support crossbar 5 descends, the first hydraulic cylinder 8 retracts, and the upper clamping plate 9 makes way for the upper clamping member. When the bottom of the upper clamping plate 9 is lower than the upper clamping member, the first hydraulic cylinder 8 rises, and the upper clamping plate 9 supports the upper clamping member. At the same time, the operator loosens the nut on the upper clamping member, so that the upper clamping member can be separated. A limit block 1 that can be elastically raised and lowered is set on the support crossbar 6 between the two sets of sliding sleeves 7. 0. A straight rod is fixed to the top of the limiting block 10 by welding. The straight rod passes through the support crossbar 5 and moves up and down along the support crossbar 5. A spring is sleeved on the straight rod. The two ends of the spring abut against the top of the limiting block 10 and the bottom of the support crossbar 5. The spring presses the limiting block 10 down. When the limiting block 10 is pressed down, it presses against the top of the upper stacked piece. The spring is compressed. When the upper clamping plate 9 rises, the upper clamping piece slowly rises. When the upper clamping piece is higher than the upper iron core stacked piece, the limiting block 10 abuts against the inside of the upper clamping piece, thus limiting the upper clamping piece.

[0032] The stacked lifting assembly 11 includes a lifting seat 12, a clamping arm 13, and a lifting rod 14. A mounting plate 15 is installed between every two sets of mounting frames 1 by bolts. The mounting plate 15 is part of the back of the mounting frame 1. The lifting seat 12 is mounted on the mounting plate 15. A second lifting assembly 17 is provided between the lifting seat 12 and the mounting frame 1. The second lifting assembly 17 is provided on the front of the mounting plate 15 (the second lifting assembly 17 includes a guide rod, a lead screw, and a stepper motor; the guide rod is fixed to the front of the mounting plate 15 by bolts). The rod passes through the lifting seat 12, which moves up and down along the guide rod. Two sets of seats are fixed to the mounting plate 15 by welding. The upper and lower ends of the lead screw are mounted on the seats by bearings. The lead screw passes through the lifting seat 12. A stepper motor is fixed to the upper seat by bolts. The output shaft of the stepper motor is welded to the lead screw, which realizes the lifting of the lifting seat 12. Two opposing clamping arms 13 are installed on the lifting seat 12. The clamping arms 13 are rotatably engaged with the lifting seat 12. One end of the clamping arms is fixed by welding. A rotating shaft passes through the lifting base 12 at both ends for rotational engagement. A motor is installed between each clamping arm 13 and the lifting base 12. The motor is fixed to the top of the lifting base 12 by bolts. The output shaft of the motor is fixed to the rotating shaft on the clamping arm by welding. The clamping arm 13 is driven to rotate by the motor. Two lifting rods 14 are installed on each clamping arm 13 by welding. The lifting rods 14 support the lower part of the upper stack. The lifting rods 14 on the two clamping arms 13 are coaxial. When the clamping arms 13 are closed, the two lifting rods 14 are joined together. A movable collar 18 is fitted on the lifting rod 14 of the third arm, and a spring is fitted on the lifting rod 14. Clamping plates 19 are fixed on the two movable collars 18, and the springs abut against the back of the clamping plates 19. A retaining plate 20 is fixed to the lifting rod 14 on another clamping arm 13 by bolt locking (the retaining plate 20 has a hole for the lifting rod 14 to pass through, and a bolt abuts against the outer wall of the lifting rod 14 through the retaining plate 20, thus achieving locking). The clamping plate 19 is pushed towards the retaining plate 20 by the spring, and the clamping plate 19 is clamped to the iron core laminations on the retaining plate 20.

[0033] Three grooves 23 are provided on the inner side of the translation frame 22 for the bracket 24 to extend into. The bracket 24 extends and retracts along the translation frame 22. A third hydraulic cylinder 25 is installed between the bracket 24 and the translation frame 22 by means of a hinge. The extension and retraction of the bracket 24 is achieved by means of the third hydraulic cylinder 25. A linearly extending fixing frame 26 is fixed on the top of the translation frame 22 by means of bolts. A positioning component 28 located above the bracket 24 is installed on the fixing frame 26. There are two sets of positioning components 28, and the two sets of positioning components 28 are arranged vertically. Coaxially arranged, multiple positioning components 28 slide with the fixing frame 26. The positioning components 28 extend and retract along the fixing frame 26. (Guide posts are fixed to the back of the positioning components 28 by welding. Each guide post passes through the fixing frame 26 and slides on the fixing frame 26. A hydraulic cylinder is fixed to the fixing frame 26 by bolts. The piston rod of the hydraulic cylinder is fixed to the positioning component 28 by bolts. The extension and retraction of the hydraulic cylinder realizes the positioning of two opposing positioning components 28.) 8. (Moving closer or further apart), wherein the positioning component 28 consists of three semicircular rings arranged side by side, and a positioning block 27 is installed on the inner wall of each semicircular ring. The top surface of each positioning block 27 is a downward sloping surface, and one end of the positioning block 27 extends into the inner wall of the semicircular ring (a through hole is opened in the inner wall of the semicircular ring for the positioning block 27 to be inserted). The positioning block 27 extends and retracts along the semicircular ring, thereby adjusting the extension amount of the positioning block 27 to position windings of different radii. A linkage plate 29 is provided above the semicircular ring, and the linkage plate 29 and the... A fourth hydraulic cylinder 30 is fixed between the semicircular rings by bolts. The fourth hydraulic cylinder 30 is used to raise and lower the linkage plate 29. Multiple vertically arranged lifting rods 31 are installed at the bottom of the linkage plate 29 by welding. Each lifting rod 31 corresponds to a positioning block 27. The lifting rod 31 passes through the semicircular rings. A push-pull rod 32 is hinged between each lifting rod 31 and the tail of the corresponding positioning block 27. When the lifting rod 31 descends, the positioning block 27 is pushed up outward, thus positioning the circumference of the winding.

[0034] A clearance groove 40 is provided on the ground to allow the positioning clamping assembly 34 to move. The positioning clamping assembly 34 clamps the transformer core and moves up and down within the clearance groove 40. A vertical guide rail 41 is bolted to the side wall of the clearance groove 40. A slide block 42 that moves up and down on the guide rail 41 is mounted on the guide rail 41 and bolted to the outer wall of the positioning clamping assembly 34. A third lifting assembly 43 is provided between the positioning clamping assembly 34 and the clearance groove 40. The third lifting assembly 43 consists of multiple hydraulic cylinders. The cylinder bodies of the third lifting assembly are bolted to the bottom of the clearance groove, and the piston rods of the third lifting assembly are bolted to the bottom of the positioning clamping assembly 34. The positioning clamping assembly 34 includes a placement plate 35, a limiting inclined plate 36, and a swinging pressure rod 3. 7. Multiple sets of relatively set limiting inclined plates 36 are installed on the placement plate 35 by bolt fastening. The limiting inclined plates 36 limit the base of the transformer core. Two sets of left and right swing pressure rods 37 are installed on the placement plate 35. The two sets of swing pressure rods 37 are located on the left and right sides of the core. The two ends of the swing pressure rods 37 are fixed to two swing arms 38 by welding. Each swing arm 38 is hinged to the placement plate 35. A fifth hydraulic cylinder 39 is installed between the swing arm 38 and the placement plate 35 by hinge. The swing arm 38 is swung by the fifth hydraulic cylinder 39. The swing pressure rods 37 press on the base of the core. When the core needs to be loaded or unloaded, the swing arm 38 swings outward and the swing pressure rods 37 make way for the base of the core. The piston rod of the third lifting component and the slide 42 are both fixed to the placement plate 35 by bolts.

[0035] Two swing rods 44 are hinged to the top of each fixed frame 26. A push-up hydraulic cylinder is installed between the fixed frame 26 and the swing rods 44. A clamping rod 45 is fixed to the other end of the two swing rods 44 by welding. The rotation of the swing rods 44 causes the clamping rod 45 to swing. When the positioning component 28 places the winding, the push-up hydraulic cylinder retracts, and the clamping rod 45 makes way for the winding. After the winding is positioned by the positioning component 28, the push-up hydraulic cylinder rises, the clamping rod 45 swings inward, and the clamping rod 45 presses against the top of the winding. When the positioning and clamping assembly 34 is lifted, due to the friction between the phase column and the inner wall of the winding, the winding will rise along with the transformer core when the core is lifted, making it impossible to nest the winding with the phase column. The positioning assembly 28 of this application positions the winding, and then the clamping rod 45 clamps the winding. This avoids the winding rising due to friction when the phase column and the winding are nested. The clamping rod 45 presses down on the top of the coil, thus preventing the winding from rising synchronously when nested on the phase column, ensuring the completion of the nesting process.

[0036] The aforementioned multiple sets of motors, stepper motors, and hydraulic cylinders are all connected to a PLC control system (connecting motors, stepper motors, and hydraulic cylinders to a PLC control system is existing technology). The PLC control system controls the starting and stopping of the motors, stepper motors, and hydraulic cylinders, thus realizing the assembly of the auxiliary transformer.

Claims

1. A large transformer auxiliary assembly platform, comprising a mounting frame, a lifting platform, a lifting mechanism, and a mounting mechanism, wherein two sets of mounting frames are installed on the ground, and the two sets of mounting frames are arranged opposite to each other, characterized in that, A positioning and clamping assembly for the iron core is provided between the two sets of mounting frames. The positioning and clamping assembly can be raised and lowered. A lifting platform that can be raised and lowered is provided on each set of mounting frames. A lifting mechanism is provided between the two sets of mounting frames. The two ends of the lifting mechanism are installed on the two sets of mounting frames. The lifting mechanism is raised and lowered on the mounting frames. A fitting mechanism is provided on the two sets of mounting frames. The winding is fitted onto the phase column through the fitting mechanism. The lifting mechanism is divided into an upper clamp lifting assembly and a stacked plate lifting assembly. The upper clamp lifting assembly is located above the stacked plate lifting assembly. Both the upper clamp lifting assembly and the stacked plate lifting assembly are slidably engaged with the mounting frame. The upper clamp lifting assembly and the stacked plate lifting assembly are raised and lowered on the mounting frame to lift the upper clamp and the upper iron core stacked plates respectively. The assembly includes a translation frame, a positioning component, and a bracket. There are two translation frames arranged opposite each other, and the two translation frames slide in contact with the ground. A movable support base is provided at the bottom of the translation frame. Multiple sets of brackets are installed side by side on each translation frame. A positioning component is provided above each bracket to position the outer circumference of the winding.

2. The auxiliary assembly platform for a large transformer according to claim 1, characterized in that, The upper clamping component lifting assembly includes a support crossbar, an upper clamping component lifting plate, and a limiting block. A first lifting component is provided between the two ends of the support crossbar and the mounting frame. Two sets of sliding sleeves are installed on the support crossbar. An L-shaped upper clamping component lifting plate is provided between each set of sliding sleeves and the support crossbar. A first hydraulic cylinder is provided between the sliding sleeves and the support crossbar to drive the sliding sleeves to move horizontally. A limiting block that can elastically lift and lower is provided between the two sets of sliding sleeves, and the limiting block abuts against the inner side of the upper clamping component.

3. The auxiliary assembly platform for a large transformer according to claim 2, characterized in that, The stacked lamination lifting assembly includes a lifting seat, clamping arms, and lifting rods. A mounting plate connects every two sets of mounting frames, and a lifting seat is mounted on the mounting plate. A second lifting assembly is located between the lifting seat and the mounting frame. Two opposing clamping arms are mounted on the lifting seat, and the clamping arms rotatably engage with the lifting seat. A motor is located between each clamping arm and the lifting seat, driving the clamping arm to rotate. Two lifting rods are mounted on each clamping arm, and the lifting rods on the clamping arms are coaxial. When the clamping arms are closed, the two lifting rods engage. A movable collar is mounted on the lifting rod of one clamping arm, and a spring is fitted onto this lifting rod. The spring abuts against the back of the clamping plate. Clamping plates are fixed to the two movable collars. A retaining plate is fixed to the lifting rod of the other clamping arm. The spring pushes the clamping plate towards the retaining plate, and the clamping plate and retaining plate clamp the upper iron core laminations.

4. The auxiliary assembly platform for a large transformer according to claim 3, characterized in that, The translation frame has grooves for the bracket to extend into, and the bracket extends and retracts along the translation frame. A third hydraulic cylinder is installed between the bracket and the translation frame to achieve the extension and retraction of the bracket. A fixed frame is fixed above the translation frame, and a positioning component located above the bracket is installed on the fixed frame. The positioning component consists of multiple sets, which are coaxially arranged vertically and slide with the fixed frame. The positioning component extends and retracts along the fixed frame. The positioning component is a semi-circular ring, and a positioning block is installed on the inner wall of the semi-circular ring. The top surface of each positioning block is a downward sloping surface, and one end of the positioning block extends into the inner wall of the semi-circular ring. The positioning block extends and retracts along the semi-circular ring. A linkage plate is installed above the semi-circular ring, and a fourth hydraulic cylinder is installed between the linkage plate and the semi-circular ring. A vertically arranged lifting rod is installed on the linkage plate, which passes through the semi-circular ring. A push-pull rod is hinged between the lifting rod and the tail of the positioning block.

5. The auxiliary assembly platform for a large transformer according to claim 4, characterized in that, A clearance slot is provided on the ground to allow the positioning and clamping assembly to move. The positioning and clamping assembly clamps the transformer core and moves up and down within the clearance slot. A vertical guide rail is installed on the side wall of the clearance slot, and a slide is mounted on the guide rail. The slide is mounted on the outer wall of the positioning and clamping assembly. A third lifting assembly is provided between the positioning and clamping assembly and the clearance slot. The positioning and clamping assembly includes a placement plate, a limiting inclined plate, and a swinging pressure rod. Multiple sets of opposing limiting inclined plates are installed on the placement plate to limit the base of the transformer core. Two sets of swinging pressure rods are installed on the placement plate, located on both sides of the core. The two ends of the swinging pressure rods are hinged to the placement plate through a swing arm. A fifth hydraulic cylinder is provided between the swing arm and the placement plate, and the swinging pressure rods press against the base of the core.

6. The auxiliary assembly platform for a large transformer according to claim 5, characterized in that, Two swing arms are hinged to the top of each fixed frame. A clamping rod is fixed to the other end of each swing arm. The clamping rod is pressed against the top of the winding by swinging. A push hydraulic cylinder is set between the fixed frame and the swing arm. The swing arm is swung by extending and retracting the push hydraulic cylinder.

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