Disassembling and assembling tool for low-voltage connecting box of three-phase combined transformer

Abstract

The utility model relates to the field of tools, in particular to a disassembling and assembling tool for a low-voltage connecting box of a three-phase combined transformer, the three-phase combined transformer comprises three main transformer box bodies arranged in parallel and a connecting box arranged above the main transformer box bodies, and the connecting box is connected with the main transformer box body under the connecting box through a pipeline. The three-phase combined transformer low-voltage connection box disassembling and assembling tool comprises a main transformer box body, adjacent connection boxes are connected through a connection channel, an upgrader installation base is installed between adjacent main transformer box bodies, bases used for supporting the upgrader installation base are arranged on the two sides of each main transformer box body, and two hydraulic cylinders are fixed to the top of each upgrader installation base. Modularized design is adopted, the overall design structure is simple, operation is convenient, and performance is reliable. The three-phase integral and split-phase vertical lifting function of the low-voltage connection box is realized, the operation is smooth without jamming, safety and stability are realized, and the integral synchronism of the low-voltage connection box in the lifting process is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of frock, concretely is a three -phase combination transformer low voltage connection box dismouting frock. BACKGROUND

[0002] The three -phase combined power transformer of power station is arranged in the main transformer room of power station underground powerhouse, and the low voltage connection box is an important component of the main transformer, which is installed on the top of the main transformer low voltage side box. The ground area (non-utilization part) of the main transformer installation space is paved with pebbles, the main transformer room space is narrow, and large hoisting equipment (crane, etc.) cannot carry out hoisting operation, so the low voltage connection box maintenance is extremely inconvenient.

[0003] At present, when the low voltage connection box cover plate and the elevated seat need to be replaced due to leakage or aging of the seal, the components of the low voltage connection box are lifted by using the top lifting point of the main transformer room, and then the seal is replaced. This method has two problems: first, the height difference between the lifting point and the top of the low voltage connection box is 16m, and the use of pre-load checking and lifting device installation requires the erection of scaffolding, which takes a long time; second, the low voltage seal is blocked, and manual operation lifting exists the problem of difficult hoisting construction.

[0004] The current way of carrying out maintenance work will occupy more maintenance resources and time, in order to standardize and optimize the dismounting operation of the low voltage connection box, a three -phase combination transformer low voltage connection box dismounting frock needs to be designed and manufactured, which realizes the vertical jacking and placing of the three -phase combination transformer low voltage connection box, and solves the problem of replacing the low voltage connection box cover plate and the elevated seat during the overhaul of the main transformer. SUMMARY

[0005] To solve the above technical problems, the utility model provides a three -phase combination transformer low voltage connection box dismounting frock.

[0006] The utility model provides a three -phase combination transformer low voltage connection box dismounting frock, three -phase combination transformer includes three parallelly arranged main transformer box body and the connection box being arranged on the main transformer box body top, and the connection box is connected with the main transformer box body below it through the pipeline, and the adjacent connection box is connected through the connecting channel, and the adjacent main transformer box body is installed with the upgrade ware mounting seat, both sides of the main transformer box body are equipped with the base for supporting the upgrade ware mounting seat, the top of the upgrade ware mounting seat is fixed with two hydraulic cylinders, and the output end of two hydraulic cylinders is fixed with T type lifting plate, the top of the main transformer box body is equipped with the support frame, and the support frame end is connected with T type lifting plate, the four corners of the support frame are installed with servo lead screw lifter, the output end of servo lead screw lifter is fixed with displacement sensor, the output end of displacement sensor is fixed with pressure sensor, and the output end of pressure sensor is in contact with the bottom of the connection box.

[0007] Preferably, the middle support frame comprises a first front support arm and a first rear support arm arranged in parallel with the first front support arm, two ends of the first front support arm and the first rear support arm are fixed on the two T-shaped lifting plates respectively, the rest of the support frames comprise a second front support arm and a second rear support arm arranged in parallel with the second front support arm, one end of the second rear support arm and the second front support arm are fixedly connected with the T-shaped lifting plate, a first support plate is symmetrically arranged between the top of the first front support arm and the first rear support arm, a second support plate is symmetrically arranged between the top of the second front support arm and the second rear support arm, and the servo lead screw lifter is fixed at the end of the first support plate and the second support plate.

[0008] Preferably, the second front support arm and the second rear support arm are fixedly connected with a back-shaped reinforcing rib.

[0009] Preferably, the first front support arm, the first rear support arm, the second front support arm and the second rear support arm are provided with a limiting frame for positioning the connection box.

[0010] Preferably, the end of the first support plate and the second support plate is provided with a notch, and the first front support arm, the first rear support arm, the second front support arm and the second rear support arm are matched with the notch.

[0011] Preferably, the base is provided with a plurality of positioning grooves, and the lifter mounting seat is provided with a positioning plate matched with the positioning grooves.

[0012] Compared with the related art, the three-phase combined transformer low-voltage connection box dismounting tool has the following beneficial effects:

[0013] The three-phase combined transformer low-voltage connection box dismounting tool adopts a main body hydraulic jacking and a local lead screw jacking structure, adopts a modular design, and has a simple and convenient operation and reliable performance. The low-voltage connection box three-phase whole and split-phase vertical lifting function is realized, smooth operation is realized, safety and stability are realized, the low-voltage connection box whole synchronization is good in the lifting process. The on-site use conditions are met, and the on-site installation, dismounting and storage and transportation are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a whole structure schematic view of the utility model;

[0015] Figure 2 It is a tool frame schematic view of the utility model;

[0016] Figure 3 It is a middle support frame installation relative position schematic view of the utility model;

[0017] Figure 4 It is an end support frame installation relative position schematic view of the utility model.

[0018] Figure 5 The gap relative position schematic view of the utility model is shown in the figure.

[0019] Figure 6 The upgrade device mounting seat structure schematic view of the utility model is shown in the figure.

[0020] The figure mark: 1, main transformer box body; 2, connecting box; 3, pipeline; 4, connecting channel; 5, upgrade device mounting seat; 6, base; 7, hydraulic cylinder; 8, T-shaped lifting plate; 9, support frame; 10, servo screw rod lifter; 11, pressure sensor; 12, first front support arm; 13, first rear support arm; 14, second front support arm; 15, second rear support arm; 16, first support plate; 17, second support plate; 18, back-shaped reinforcing rib; 19, limiting frame; 20, gap; 21, positioning groove; 22, positioning plate; 23, displacement sensor. DETAILED DESCRIPTION

[0021] The utility model will be further explained in connection with the drawings and implementation.

[0022] Please combine with reference to Figures 1 to 6 A three-phase combined transformer low-voltage connecting box dismounting tool, the three-phase combined transformer includes three parallelly arranged main transformer box bodies 1 and a connecting box 2 arranged above the main transformer box body 1, and the connecting box 2 is connected with the main transformer box body 1 directly below it through a pipeline 3, adjacent connecting boxes 2 are connected through connecting channels 4, and adjacent main transformer box bodies 1 are provided with upgrade device mounting seats 5, both sides of the main transformer box body 1 are provided with bases 6 for supporting the upgrade device mounting seat 5, two hydraulic cylinders 7 are fixed to the top of the upgrade device mounting seat 5, a T-shaped lifting plate 8 is fixed to the output ends of the two hydraulic cylinders 7, a support frame 9 is arranged directly above the main transformer box body 1, the end of the support frame 9 is connected with the T-shaped lifting plate 8, servo screw rod lifters 10 are arranged at the four corners of the support frame 9, a displacement sensor 23 is fixed to the output end of the servo screw rod lifter 10, a pressure sensor 11 is fixed to the output end of the displacement sensor 23, and the output end of the pressure sensor 11 is in contact with the bottom of the connecting box 2.

[0023] The output end of the servo screw rod lifter 10 is fixed with the pressure sensor 11 and the displacement sensor 23, the pressure sensor 11 transmits pressure data to the controller in real time during the jacking process, the controller carries out displacement compensation for the individual servo screw rod lifter 10 according to the difference of the pressure data, so that the jacking forces of the twelve servo screw rod lifters 10 are equal.

[0024] The displacement sensor 23 transmits displacement data to the controller to ensure the horizontality of the connection box 2 during the jacking process. When the displacement data and the pressure data conflict, the system alarms, and the displacement data is given priority. If there is no jamming or obstacle interference at the position of the servo-screw rod lifter 10 with high pressure, the system is manually restored.

[0025] The hydraulic cylinder 7 is fixed on the lifter mounting seat 5, and the hydraulic pump station is controlled by the hydraulic control system to ensure the synchronization of the four hydraulic cylinders 7.

[0026] The hydraulic cylinder 7 has a lifting height of 200 mm, and the hydraulic control system has a self-holding stability function at any height during lifting.

[0027] The single hydraulic cylinder 7 has a bearing capacity of 30 t, a lifting speed of 10 mm / s, and a step length of 5 mm / second.

[0028] The middle support frame 9 includes a first front support arm 12 and a first rear support arm 13 arranged in parallel with the first front support arm 12, both ends of the first front support arm 12 and the first rear support arm 13 are fixed on the two T-shaped lifting plates 8, the remaining support frames 9 include a second front support arm 14 and a second rear support arm 15 arranged in parallel with the second front support arm 14, one end of the second rear support arm 15 and the second front support arm 14 are fixedly connected with the T-shaped lifting plate 8, the first front support arm 12 and the first rear support arm 13 are symmetrically installed with a first support plate 16 between the top portions thereof, the second front support arm 14 and the second rear support arm 15 are symmetrically installed with a second support plate 17 between the top portions thereof, and the servo-screw rod lifter 10 is fixed to the end portions of the first support plate 16 and the second support plate 17.

[0029] The materials of the first front support arm 12, the first rear support arm 13, the second front support arm 14, and the second rear support arm 15 are Q355, and the verticality and flatness are ensured after surface milling and rust-proof treatment after surface spraying,

[0030] Through simple stress analysis, the deformation of the first support plate 16 and the second support plate 17 is 0.05 mm after bearing 5 tons, and the safety factor is 3, which meets the requirements of the preliminary design.

[0031] The second front support arm 14 and the second rear support arm 15 are fixed with a back-shaped reinforcing rib 18 therebetween.

[0032] The first front support arm 12, the first rear support arm 13, the second front support arm 14, and the second rear support arm 15 are each provided with a limiting frame 19 for positioning the connection box 2.

[0033] The end of the first support plate 16 and the second support plate 17 is provided with a notch 20, and the first front support arm 12, the first rear support arm 13, the second front support arm 14 and the second rear support arm 15 are matched with the notch 20.

[0034] The base 6 is provided with a plurality of positioning grooves 21, and the upgrade mount 5 is provided with a positioning plate 22 matched with the positioning grooves 21.

[0035] The positioning plate 22 of the upgrade mount 5 is clamped into the positioning groove 21 of the main transformer box body 1;

[0036] The flange hole of the upgrade mount 5 and the hydraulic cylinder 7 are fixedly connected through bolts, the hydraulic cylinder 7 is connected to the hydraulic system through an oil pipe, and the bolt torque is consistent.

[0037] The output end of the hydraulic cylinder 7 is fixedly connected with the T-shaped lifting plate 8 through bolts, and the bolt torque is consistent.

[0038] The middle support frame 9 is installed, the first front support arm 12 and the first rear support arm 13 are installed to the corresponding positions of the T-shaped lifting plate 8, the bolts are not locked, then the first support plate 16 is installed, the position is adjusted, and the bolts are locked, and the bolt torque is consistent.

[0039] The double-sided support frame 9 is installed, the second front support arm 14 and the second rear support arm 15 are installed to the corresponding positions of the T-shaped lifting plate 8, the bolts are not locked, then the second support plate 17 and the back-shaped reinforcing rib 18 (both have a limiting function) are installed, the position is adjusted, and the bolts are locked, and the bolt torque is consistent.

[0040] After the servo lead screw lifter 10, the displacement sensor 23 and the pressure sensor 11 are installed, the assembly is installed to the corresponding positions of the first support plate 16 and the second support plate 17, and the bolts are locked; the pressure and displacement signals of the twelve groups of jacking mechanisms are verified to be correct, and the position of the servo lead screw lifter 10 is returned to zero. The bolt torque is consistent.

[0041] It has automatic and manual control modes, which is convenient for debugging and use.

[0042] The hydraulic cylinder 7 is used for lifting the tool main body to the upper pressure sensor 11 of the servo lead screw lifter 10, and the bottom of the box 2 is connected in contact, and the hydraulic cylinder 7 stops working. According to the 12 groups of pressure signals, the servo lead screw lifter 10 with low pressure is independently adjusted, so that the lifting force of the 12 groups of servo lead screw lifters 10 is consistent, and all pressure signals are collected; the horizontal sensor 23 signal and the displacement sensor 23 signal are compared, which has stroke protection and overload protection, prevents lifting from overstroke and overload, and is equipped with a limiting device to prevent equipment from deviating or tilting during lifting.

[0043] It has pressure loss and power-off protection function, stops lifting in unstable state, sends alarm signal, and ensures equipment and personnel safety.

[0044] It is configured with display screen to view monitoring data such as lifting stroke and load, and should send gentle prompt sound during lifting operation, send urgent buzzer sound when abnormality occurs, and display alarm information.

[0045] The device is in assembled form, and each component is transferred to the main transformer connection box for assembly, and after assembly, the device should be stable and firm, the device structure should be good in stress, and meet the needs of low-voltage connection box lifting and load.

[0046] The three-phase whole lifting of the connection box 3 has synchronization, and the mutual comparison stroke synchronization error of all lifting device actuators is not more than 2mm.

[0047] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the present application.

Claims

1. A three-phase combined transformer low-voltage connection box dismounting tool, the three-phase combined transformer comprising three main transformer box bodies (1) arranged in parallel and a connection box (2) arranged above the main transformer box bodies (1), and the connection box (2) is connected with the main transformer box body (1) directly below it through a pipe (3), and adjacent connection boxes (2) are connected through a connection channel (4), characterized in that, The adjacent main transformer box body (1) is provided with an upgrade installation seat (5), both sides of the main transformer box body (1) are provided with a base (6) for supporting the upgrade installation seat (5), the top of the upgrade installation seat (5) is fixedly provided with two hydraulic cylinders (7), the output ends of the two hydraulic cylinders (7) are fixedly connected with a T-shaped lifting plate (8), the top of the main transformer box body (1) is provided with a support frame (9), the end of the support frame (9) is connected with the T-shaped lifting plate (8), the four corners of the support frame (9) are provided with a servo lead screw lifter (10), the output end of the servo lead screw lifter (10) is fixedly provided with a displacement sensor (23), the output end of the displacement sensor (23) is fixedly provided with a pressure sensor (11), and the output end of the pressure sensor (11) is in contact with the bottom of the connecting box (2).

2. The dismounting tool for low-voltage connection box of three-phase combined transformer according to claim 1, characterized in that, The support frame (9) located in the middle comprises a first front supporting arm (12) and a first rear supporting arm (13) arranged in parallel with the first front supporting arm (12), and the two ends of the first front supporting arm (12) and the first rear supporting arm (13) are fixed on the two T-shaped lifting plates (8), respectively; the rest of the support frames (9) comprise a second front supporting arm (14) and a second rear supporting arm (15) arranged in parallel with the second front supporting arm (14), and one end of the second rear supporting arm (15) and the second front supporting arm (14) is fixedly connected with the T-shaped lifting plate (8); the first front supporting arm (12) and the first rear supporting arm (13) are symmetrically provided with a first supporting plate (16) between the top portions thereof; the second front supporting arm (14) and the second rear supporting arm (15) are symmetrically provided with a second supporting plate (17) between the top portions thereof; and the servo lead screw lifter (10) is fixed at the end of the first supporting plate (16) and the second supporting plate (17).

3. The dismounting tool for low-voltage connection box of three-phase combined transformer according to claim 2, characterized in that, The second front supporting arm (14) and the second rear supporting arm (15) are fixedly provided with a back-shaped reinforcing rib (18) therebetween.

4. The dismounting tool for low-voltage connection box of three-phase combined transformer according to claim 2, characterized in that, The first front supporting arm (12), the first rear supporting arm (13), the second front supporting arm (14) and the second rear supporting arm (15) are all provided with a limiting frame (19) for positioning the connecting box (2).

5. The dismounting tool for low-voltage connection box of three-phase combined transformer according to claim 2, characterized in that, The end of the first supporting plate (16) and the second supporting plate (17) is provided with a notch (20), and the first front supporting arm (12), the first rear supporting arm (13), the second front supporting arm (14) and the second rear supporting arm (15) are matched with the notch (20).

6. The dismounting tool for low-voltage connection box of three-phase combined transformer according to claim 2, characterized in that, The base (6) is provided with a plurality of positioning grooves (21), and the upgrade installation seat (5) is provided with a positioning plate (22) matched with the positioning grooves (21).

Images