Transformer iron core perpendicularity correction device and method

Abstract

The invention belongs to the technical field of iron core preparation, and particularly relates to a transformer iron core perpendicularity correcting device and method. The transformer iron core perpendicularity correcting device comprises two sets of correcting assemblies and a cover top, and each correcting assembly comprises two stand columns, a cross beam, an electric ejector rod and a manual ejector rod; the electric ejector rod comprises an ejector rod frame, an ejector rod assembly and a limiting assembly, the ejector rod assembly comprises a power element and a push rod, and the limiting assembly comprises a guide block, a spring plunger and a limiting switch. The device can replace manual work to achieve perpendicularity correction of the transformer iron core, and is suitable for all iron core sizes of 5-15 tons; perpendicularity correction is achieved through the electric push rod, the minimum precision of the pushing and stretching distance is controlled to be millimeter, and the correction precision is guaranteed; the correcting devices are arranged on the two sides of the iron core, the bottom position of the iron core is limited while the top of the iron core is pushed, and the situation that the inclination direction of the iron core is not fixed or toppling and sliding occur is effectively prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of iron core preparation, and in particular relates to a transformer iron core verticality correction device and method. Background Art

[0002] The transformer core verticality correction device is a special device for correcting the inclined core to be vertical when the core is in an upright state. It can correct the side columns and middle columns of the core to a vertical state.

[0003] There is no adapter device in the prior art. For the skewed state of the transformer core, the transformer core below 5 tons is basically hammered with a hammer through a knock block or pried with a lever by the staff, and the transformer core above 5 tons needs to be hoisted on the yoke by a crane for operation; due to the lack of precision control, the staff needs to repeatedly operate and verify the results, which is very inefficient and very unsafe. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problem and provides a transformer core verticality correction device, which is suitable for all core sizes of 5-15 tons, can improve the safety of the verticality correction process, prevent the core from tipping over, and at the same time improve the verticality accuracy of the core and improve the one-time success rate of correction.

[0005] According to the technical solution of the present invention, the transformer core verticality correction device comprises two sets of correction components arranged opposite to each other and a cover arranged between the tops of the two sets of correction components; The correction assembly includes two upright posts, a crossbeam movably mounted between the two upright posts, and an electric push rod and a manual push rod movably mounted on the crossbeam; The electric push rod comprises a push rod frame, a push rod assembly and a limit assembly mounted on the push rod frame; the push rod assembly comprises a power element and a push rod, a fixed block is mounted on the movable end of the power element; the push rod comprises a rod body, one end of the rod body is rotatably mounted on the fixed block through a movable shaft, and a push block is arranged at the other end of the rod body; the limit assembly comprises a guide block, a spring plunger and a limit switch, the guide block is mounted directly below the rod body of the push rod, a groove for accommodating the rod body is arranged on the top of the guide block, the spring plunger is mounted in the groove, and the limit switch is mounted directly below the push block of the push rod; The manual ejector comprises a bracket and an ejector.

[0006] Furthermore, the crossbeam includes a crossbeam body and a driving assembly, wherein the driving assembly is used to drive the crossbeam body to move up and down along the column, and the driving assembly includes a driving element, a transmission element and an actuator, and the actuator is installed between the crossbeam body and the column, and the actuator is a gear rack structure, a worm gear structure or a sprocket chain structure.

[0007] Furthermore, a beam guide assembly is provided between the column and the beam.

[0008] Furthermore, the electric mandrel also includes a distance meter, and the distance meter is installed on the mandrel frame.

[0009] Furthermore, an electric push rod guide assembly is provided between the cross beam and the electric push rod, and a manual push rod guide assembly is provided between the cross beam and the manual push rod.

[0010] Furthermore, the top rod frame and the bracket are an integrated structure.

[0011] Furthermore, the bracket includes a fixed end and a rotating end, the fixed end is movably mounted on the beam, and the rotating end is rotatably mounted on the fixed end; the surface of the top rod is provided with threads and cooperates with the rotating end through a threaded block.

[0012] Furthermore, buffer pads are provided on the end surfaces of the push rod and the push rod.

[0013] Another aspect of the present invention provides a method for correcting the verticality of a transformer core, comprising the following steps: S1: conveying a transformer core between two sets of correction components of the transformer core verticality correction device, wherein the transformer core comprises an upper yoke clamp, a core column and a lower yoke clamp; S2: Move the crossbeam of the correction assembly on the side where the transformer core is offset to below the upper yoke clamp, position the electric push rod to the center of the core column, and adjust the push rod so that the push block is against the core column; S3: Move the crossbeam of the correction assembly on the other side to the lower yoke clamp, and adjust the manual push rod so that the push rod is against the center position of the lower yoke clamp; S4: Start the power element of the electric push rod in step S2, so that the push rod pushes the iron core column until the push rod is in a horizontal state, the rod body of the push rod presses down the spring plunger and the push block contacts the limit switch, the power element stops working, and the iron core column is in a vertical state; S5: The operations of steps S2 and S4 are performed until all the core columns are in a vertical state; The steps of steps S2 and S3 are not limited.

[0014] Furthermore, the step S4 also includes the following operations: detecting the offset of the core column, and setting the maximum pushing distance of the push rod according to the offset.

[0015] The technical solution of the present invention has the following advantages over the prior art: The device of the present invention can replace manual work to realize the verticality correction of the transformer core, and is suitable for all core sizes of 5-15 tons; an electric push rod is used to realize the verticality correction, and the minimum accuracy of the pushing distance is controlled within millimeters, thereby ensuring the correction accuracy; correction devices are arranged on both sides of the core, which push the top of the core while limiting the bottom position of the core, effectively preventing the core from being tilted in an unstable direction or tipping over or sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the overall structure of the transformer core verticality correction device of the present invention.

[0017] Figure 2 It is a structural schematic diagram of the column of the present invention.

[0018] Figure 3 and 4 It is a structural schematic diagram of the crossbeam of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the electric jack of the present invention.

[0020] Figure 6 It is a schematic structural diagram of the manual ejector of the present invention.

[0021] Figure 7 It is a schematic structural diagram of the roof of the present invention.

[0022] Figure 8 This is a schematic diagram of the structure of the transformer core.

[0023] Description of reference numerals: 100-column, 110-column body, 120-guide rail, 130-rack, 200-crossbeam, 210-crossbeam body, 220-driving assembly, 221-driving element, 222-transmission element, 223-actuator, 224-coupling, 225-bearing support seat, 226-bearing seat, 227-cylinder stopper, 230-guide roller, 240-transverse rack, 250-electric push rod guide rail, 260-manual push rod guide rail, 300-electric push rod, 310-push rod frame, 320-push rod assembly, 321-power element, 322-push rod, 323-fixed block, 324-movable shaft, 330 -Limiting assembly, 331-guide block, 332-spring plunger, 333-limit switch, 334-bracket structure, 340-distometer, 350-transverse drive assembly, 360-electric push rod slider, 400-manual push rod, 410-bracket, 420-pusher, 411-fixed end, 412-rotating end, 413-manual push rod rotating shaft, 414-locating pin, 415-locating plate, 421-threaded block, 422-pusher buffer pad, 430-manual push rod slider, 500-top cover, 510-top cover body, 520-diagonal brace, 600-transformer core, 610-upper yoke clamp, 620-core column, 630-lower yoke clamp. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0025] like Figure 1 As shown, the present invention provides a transformer core verticality correction device, including two groups of correction components arranged opposite to each other and a cover 500 arranged between the tops of the two groups of correction components.

[0026] The correction assembly includes a column 100, a beam 200, an electric push rod 300 and a manual push rod 400. In each set of correction assemblies, there are two columns 100, the beam 200 is movably installed between the two columns 100, and the electric push rod 300 and the manual push rod 400 are movably installed on the beam 200. It is conceivable that the electric push rod 300 and the manual push rod 400 are at least one group. In order to ensure the stability of the overall structure of the transformer core during the correction process, the electric push rod 300 and the manual push rod 400 can also be set as two or more groups.

[0027] like Figure 3 and 4As shown, the cross beam 200 includes a cross beam body 210 and a driving assembly 220 for driving the cross beam body 210 to move up and down along the column 100. The driving assembly 220 includes a driving element 221, a transmission element 222 and an actuator 223, and the actuator 223 is installed between the cross beam body 210 and the column 100, and the actuator 223 is a gear rack structure, a worm gear structure or a sprocket chain structure.

[0028] In one embodiment, Figure 3 and 4 As shown, the driving element 221 adopts a hollow shaft type motor, the transmission element 222 adopts a long shaft, and the actuator 223 is a gear rack structure. Specifically, the driving element 221 (i.e., the hollow shaft type motor) cooperates with the transmission element 222 (i.e., the long shaft) to provide lifting power, and the two ends of the transmission element 222 are connected to the gear of the actuator 223 through the coupling 224 to transmit power. The rack 130 in the actuator 223 is installed on the column body 110 of the column 100, and the gear and the rack 130 are engaged to provide lifting power. Preferably, since a long shaft is used as the transmission element 222, in order to prevent deformation caused by large torque, a bearing support seat 225 is provided on the long shaft, and the number of bearing seats 225 can be adjusted according to actual needs, and there are two in the figure. In order to ensure that the gear in the actuator 223 is engaged with the rack 130, a bearing seat 226 is also provided, and a cylinder stopper 227 is installed below the bearing seat 226.

[0029] In order to ensure that the crossbeam 200 moves up and down along the column 100, a crossbeam guide assembly is provided between the column 100 and the crossbeam 200. Figure 2-4 As shown, the beam guide assembly includes a guide rail 120 installed on the column body 110 and guide rollers 230 installed at both ends of the beam body 210. Preferably, a groove can be provided on the column body 110, and a guide rail 120 is provided at the bottom and both sides of the groove. Correspondingly, the rollers 230 include rollers in the middle and on both sides, which cooperate with the guide rails at the bottom and both sides of the groove respectively.

[0030] like Figure 2 As shown, limit baffles 140 are also provided at the upper and lower ends of the guide rail 120 to prevent collision during lifting or lowering. A cover connecting plate 150 is also provided at the top of the column body 110 to facilitate the fixed installation of the cover 500; a mounting base plate 160 is provided at the bottom of the column body 110 to facilitate the fixed installation of the overall structure; and a plurality of reinforcing plates can be provided between the mounting base plate 160 and the column body 110.

[0031] like Figure 5As shown, the electric push rod 300 includes a push rod frame 310, a push rod assembly 320 and a limit assembly 330 installed on the push rod frame 310, and the push rod assembly 320 includes a power element 321 and a push rod 322. The power element 321 can be an electric cylinder, a screw rod, a cylinder, etc., and a fixed block 323 is installed at the movable end of the power element 321. The push rod 322 includes a rod body, one end of the rod body is rotatably installed on the fixed block 323 through a movable shaft 324, and a push block is arranged at the other end of the rod body. The push block is arranged perpendicular to the rod body, and the push block partly extends out of the push rod frame 310, and the lower end of the push block is lower than the rod body.

[0032] The limit assembly 330 includes a guide block 331, a spring plunger 332 and a limit switch 333. The guide block 331 is installed directly below the rod body of the push rod 322, and a groove for accommodating the rod body is provided at the top of the guide block 331, and the spring plunger 332 is installed in the groove. Specifically, two protrusions can be provided at the top of the guide block 331, and a groove is formed between the protrusions, and the width of the groove is wider than the rod body of the push rod 322. The limit switch 333 is installed directly below the push block of the push rod 322, and can be installed at the end of the push rod frame 310 using a bracket structure 334. The limit switch 333 is connected to the power element 321 in communication, and when the limit switch 333 is touched, the power element 321 stops working. In the initial state of the push rod 322, it will be lifted up by the spring plunger 332. When the push rod 322 is pushed straight, it is affected by the pressure, and the rod body part flattens the spring plunger 332, and the push block touches the limit switch 333.

[0033] The electric jack 300 also includes a transverse drive assembly 350, which provides horizontal movement power. For example, it can be a transverse motor, and its output end, such as a gear, is engaged with the transverse rack 240 on the beam body 210. It is conceivable that the transverse drive assembly 350 can also adopt other similar structures to achieve lateral movement of the electric jack 300.

[0034] In one embodiment, the electric ram 300 further includes a distance meter 340 for detecting the distance between the electric ram 300 and the core column 620 . The distance meter 340 is also mounted on the ram frame 310 , and specifically can be located on one side of the push rod 322 .

[0035] like Figure 6As shown, the manual push rod 400 includes a bracket 410 and a push rod 420. The bracket 410 includes a fixed end 411 and a rotating end 412. The fixed end 411 is movably mounted on the cross beam 200, and the rotating end 412 is rotatably mounted on the fixed end 411. The surface of the push rod 420 is provided with threads, and is matched with the rotating end 412 through a threaded block 421. Specifically, the fixed end 411 and the rotating end 412 are both hollow structures. A manual push rod rotating shaft 413 is installed inside the fixed end 411 to cooperate with the rotating end 412 for rotation operation. The direction is fixed by a positioning pin 414 and a positioning plate 415 on one side of the rotating end 412. A threaded block 421 is installed at one end of the rotating end 412 away from the fixed end 411. The push rod 420 is threadedly matched with the threaded block 421. The push rod 420 is rotated to adjust the length of the push rod 420 extending out of the rotating end 412 for lifting operation.

[0036] To ensure that the electric push rod 300 and the manual push rod 400 move in a specified direction, an electric push rod guide assembly is provided between the cross beam 200 and the electric push rod 300, and a manual push rod guide assembly is provided between the cross beam 200 and the manual push rod 400. Specifically, the electric push rod guide assembly includes an electric push rod guide rail 250 installed on the cross beam body 210, and an electric push rod slider 360 installed on the push rod frame 310; the manual push rod guide assembly includes a manual push rod guide rail 260 installed on the cross beam body 210 and a manual push rod slider 430 installed on the bracket 410.

[0037] Preferably, to avoid scratching the surface of the core column 620, a buffer pad is provided on the end surface of the push rod 420 and the push rod 322, such as the push rod buffer pad 422 at the end of the push rod 420. The buffer pad can be made of nylon.

[0038] like Figure 5 As shown, the push rod frame 310 and the bracket 410 are an integrated structure and can be fixed together by welding, so that the manual push rod 400 can move with the electric push rod 300 without manual operation or additional driving structure.

[0039] like Figure 7 As shown, the top cover 500 includes a top cover body 510 and diagonal braces 520 disposed at four corners of the top cover body 510 .

[0040] Based on the above transformer core verticality correction device, the present invention also provides a transformer core verticality correction method, comprising the following steps: S1: transporting the transformer core 600 between the two sets of correction components of the transformer core verticality correction device; Figure 8 As shown, the transformer core 600 includes an upper yoke clamp 610, a core column 620 and a lower yoke clamp 630; S2: Move the crossbeam 200 of the correction assembly on the offset side of the transformer core 600 to below the upper yoke clamp 610, position the electric push rod 300 to the center of the core column 620, and adjust the push rod 322 so that the push block abuts against the core column; S3: Move the crossbeam 200 of the correction assembly on the other side to the lower yoke clamp 610, and adjust the manual push rod 400 so that the push rod 420 abuts against the center position of the lower yoke clamp 610; S4: Start the power element 321 of the electric push rod 300 in step S2, so that the push rod 322 pushes the iron core column 620 until the push rod 322 is in a horizontal state, the rod body of the push rod 322 presses down the spring plunger 332 and the push block contacts the limit switch 333, the power element 321 stops working, and the iron core column 620 is in a vertical state; S5: The operations of steps S2 and S4 are performed until all the core columns 620 are in a vertical state; The steps of steps S2 and S3 are not limited.

[0041] In order to prevent the limit switch 333 from pushing the core column 620 when it fails, the following operations are also included before step S4: detecting the offset of the core column 620, and setting the maximum push distance of the push rod 322 according to the offset. Specifically, the crossbeam 200 of the correction assembly can be operated to the bottom of the upper yoke clamp 610 (such as 10 cm below), the electric push rod 300 is positioned at the center of the core column 620, and the distance between the electric push rod 300 and the core column 620 is detected by the distance meter 340; then the crossbeam 200 is operated to descend and positioned above the lower yoke clamp 630 (such as 10 cm above), the electric push rod 300 is positioned at the center of the core column 620, and the distance between the electric push rod 300 and the core column 620 is detected again; the distance that the core column 620 needs to be corrected is calculated by the distance measured twice, and the distance + 5 mm is used as the maximum push distance of the push rod 322.

[0042] Preferably, in step S4, the output force of the power element 321 is ≥1000N, the lifting speed of the core column 620 pushed by the push rod 322 is controlled at 1mm / s, and the overall lifting accuracy is controlled within 0.5mm, ensuring that the core verticality deviation requirement is met and is less than 0.3% of the height.

[0043] Obviously, the above embodiments are only examples for clear explanation and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the protection scope of the invention.

Claims

1. A transformer core verticality correction device, characterized in that: It comprises two groups of correction components arranged opposite to each other and a cover (500) arranged between the tops of the two groups of correction components; The correction assembly comprises two upright posts (100), a crossbeam (200) movably mounted between the two upright posts (100), and an electric push rod (300) and a manual push rod (400) movably mounted on the crossbeam (200); The electric push rod (300) comprises a push rod frame (310), a push rod assembly (320) and a limit assembly (330) mounted on the push rod frame (310); the push rod assembly (320) comprises a power element (321) and a push rod (322), the movable end of the power element (321) being mounted with a fixed block (323); the push rod (322) comprises a rod body, one end of the rod body being rotatably mounted on the fixed block (323) via a movable shaft (324). 23), a push block is arranged at the other end of the rod body; the limit assembly (330) comprises a guide block (331), a spring plunger (332) and a limit switch (333), the guide block (331) is installed directly below the rod body of the push rod (322), a groove for accommodating the rod body is arranged at the top of the guide block (331), the spring plunger (332) is installed in the groove, and the limit switch (333) is installed directly below the push block of the push rod (322); The manual ejector rod (400) comprises a bracket (410) and an ejector rod (420).

2. The transformer core verticality correction device according to claim 1, characterized in that: The crossbeam (200) comprises a crossbeam body (210) and a driving assembly (220), wherein the driving assembly (220) is used to drive the crossbeam body (210) to move up and down along the column (100), and the driving assembly (220) comprises a driving element (221), a transmission element (222), and an actuator (223), wherein the actuator (223) is installed between the crossbeam body (210) and the column (100), and the actuator (223) is a gear rack structure, a worm gear structure, or a sprocket chain structure.

3. The transformer core verticality correction device according to claim 1 or 2, characterized in that: A crossbeam guide assembly is provided between the upright column (100) and the crossbeam (200).

4. The transformer core verticality correction device according to claim 1, characterized in that: The electric mandrel (300) further comprises a distance meter (340), wherein the distance meter (340) is mounted on the mandrel frame (310).

5. The transformer core verticality correction device according to claim 1, characterized in that: An electric push rod guide assembly is provided between the crossbeam (200) and the electric push rod (300), and a manual push rod guide assembly is provided between the crossbeam (200) and the manual push rod (400).

6. The transformer core verticality correction device according to claim 1, characterized in that: The top rod frame (310) and the bracket (410) are an integrated structure.

7. The transformer core verticality correction device according to claim 1 or 6, characterized in that: The bracket (410) comprises a fixed end (411) and a rotating end (412); the fixed end (411) is movably mounted on the crossbeam (200), and the rotating end (412) is rotatably mounted on the fixed end (411); a thread is provided on the surface of the top rod (420) and is matched with the rotating end (412) via a thread block (421).

8. The transformer core verticality correction device according to claim 1, characterized in that: Buffer pads are provided on the end surfaces of the push rod (322) and the push rod (420).

9. A method for correcting the verticality of a transformer core, characterized in that: The following steps are included: S1: conveying a transformer core (600) between two groups of correction components of a transformer core verticality correction device according to any one of claims 1 to 8, wherein the transformer core (600) comprises an upper yoke clamp (610), a core column (620) and a lower yoke clamp (630); S2: Move the crossbeam (200) of the correction assembly on the offset side of the transformer core (600) to below the upper yoke clamp (610), position the electric push rod (300) to the center of the core column (620), and adjust the push rod (322) so that the push block abuts against the core column (620); S3: moving the crossbeam (200) of the correction assembly on the other side to the lower yoke clamp (610), and adjusting the manual push rod (400) so that the push rod (420) abuts against the center position of the lower yoke clamp (610); S4: starting the power element (321) of the electric push rod (300) in step S2, so that the push rod (322) pushes the iron core column (620) until the push rod (322) is in a horizontal state, the rod body of the push rod (322) presses down the spring plunger (332) and the push block contacts the limit switch (333), the power element (321) stops working, and the iron core column (620) is in a vertical state; S5: the operations of steps S2 and S4 are performed until all the core columns (620) are in a vertical state; The steps of steps S2 and S3 are not limited.

10. The method for correcting the verticality of a transformer core according to claim 9, characterized in that: The step S4 also includes the following operations: detecting the offset of the core column (620), and setting the maximum pushing distance of the push rod (322) according to the offset.

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