Tap switch maintenance device and use method

Abstract

The invention relates to a tap switch overhauling device which comprises a hoisting base and an arm type hoisting machine, a stand column is arranged above the hoisting base, the bottom of the stand column is installed on the hoisting base through a reinforcing base, the arm type hoisting machine is arranged on one side of the upper portion of the stand column, and the arm type hoisting machine is movably connected with the stand column through a rotation adjusting mechanism. The direction of the arm type lifting machine is adjusted by rotating the adjusting mechanism; a monorail lifting trolley is slidably mounted below the arm type lifting machine, a lifting rope is arranged below the monorail lifting trolley, a lifting buckle is mounted at the end part of the free end of the lifting rope, and an anti-falling lifting hook is mounted on the lifting buckle; a standby support is arranged on the lower portion of the side, corresponding to the arm type lifting machine, of the stand column and used for placing the drained tap switch for standby application. The device has the advantages of being reasonable in structure, convenient to overhaul, capable of recycling waste oil, capable of improving working efficiency and good in safety.

Description

Technical Field

[0001] The invention belongs to the technical field of transformer maintenance equipment, and in particular relates to a tap switch maintenance device and a use method thereof. Background Art

[0002] On-load tap changer refers to a voltage regulating device suitable for operation under transformer excitation or load, used to change the tap connection position of transformer winding. Its basic principle is to switch between taps in transformer winding without interrupting load current, thereby changing the number of turns of winding, that is, the voltage ratio of transformer, and finally achieving the purpose of voltage regulation. When the tap changer used for voltage regulation of main transformer is in operation, real-time online monitoring is required to count the number of voltage regulation times of tap changer on main transformer. When the tap changer is frequently adjusted and the adjustment is carried out under load, the internal carbon metal arc is serious, and the voltage regulation is ineffective. When the gear reaches three thousand times of maintenance, the insulation of the oil is no longer qualified. When the tap switch is overhauled, the clean oil becomes black oil, and the sediment is mainly metallic carbon material, which needs to be cleaned in time; in addition, the existing maintenance device is prone to unhooking when lifting the maintenance switch, which poses certain safety hazards and even leads to safety accidents; and it is impossible to adjust the lifting distance according to the position of the maintenance switch, which is inconvenient to use; therefore, it is very necessary to provide a tap switch maintenance device and a method of use with a reasonable structure, easy maintenance, waste oil recovery, improved work efficiency and good safety. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a tap changer maintenance device and a method of use which have a reasonable structure, are easy to maintain, can recycle waste oil, improve work efficiency and have good safety.

[0004] The objective of the present invention is achieved as follows: a tap changer maintenance device comprises a lifting base and an arm crane, a column is arranged above the lifting base, the bottom of the column is mounted on the lifting base through a reinforced base, an arm crane is arranged on one side of the upper part of the column, the arm crane is movably connected to the column through a rotating adjustment mechanism, and the direction of the arm crane is adjusted by the rotating adjustment mechanism; a monorail lifting trolley is slidably installed below the arm crane, a lifting rope is arranged below the monorail lifting trolley, a lifting buckle is installed at the free end of the lifting rope, and an anti-drop hook is installed on the lifting buckle; a spare bracket is arranged at the lower part of one side of the column corresponding to the arm crane, which is used to place the drained tap changer for standby use.

[0005] The lifting base includes a square seat for installing a reinforced base, a handle is arranged on one side of the square seat, universal wheels are arranged at the four corners of the bottom of the square seat, hinged seats are arranged on the outer sides of the four corners of the square seat, square tubes are hinged inside the hinged seats, manual adjustment screws are arranged at the outer ends of the square tubes, and the lower ends of the manual adjustment screws passing through the square tubes are installed with electric-controlled strong magnetic foot seats.

[0006] The arm crane comprises a suspension beam, an inclined rod is arranged upwardly inclined on the suspension beam, and the inclined rod is connected to the suspension beam through a plurality of stabilizing rods.

[0007] The rotation adjustment mechanism includes a rotating column, the upper and lower parts of which are fixedly connected to the corresponding inclined rods and suspension beams respectively, bearing seats are provided at the upper and lower ends of the rotating column, a flange-type gear motor is provided on one side above the rotating column, and a large gear meshing with the flange-type gear motor is installed on the bearing seat above the rotating column.

[0008] The monorail lifting trolley includes a roller trolley that is rollingly connected to the hanging beam, a winch is arranged below the roller trolley, the winch is wound and connected with the hanging rope, and a travel drive motor is arranged behind the roller trolley for driving the roller trolley to move along the hanging beam.

[0009] The anti-drop hook includes a group of lifting handles, wherein the upper ends of the lifting handles are cross-connected and the lower ends are separated, a U-shaped ring connected to the lifting buckle is installed on the upper end of the lifting handle, and the U-shaped ring is connected to the lifting handle through a pin shaft, and a limiting slot is provided at the lower part of the lifting handle, and a clamping ring is detachably connected to the outside of the limiting slot; a double hook plate and a single hook plate are movably installed at the lower end of the lifting handle, and the double hook plate and the single hook plate are connected by an axle pin, and a positioning pin is provided above the axle pin.

[0010] The spare bracket includes a horizontally arranged frame, a vertically arranged rectangular frame is installed below the frame, and both ends of the rectangular frame are connected to the frame through diagonal braces; a downwardly inclined support rod is arranged in the middle of the rectangular frame, and one end of the support rod is connected to the frame through a connecting plate, and the connection between the connecting plate and the frame and the connection between the connecting plate and the support rod are fixedly connected to the column through bolt seats.

[0011] A tap switch maintenance device also includes an oil collecting mechanism, the oil collecting mechanism includes a base plate, a side bracket is arranged on one side above the base plate, an L-shaped frame is arranged on the left side of the side bracket, a lifting cylinder is arranged below the L-shaped frame, an oil collecting box is arranged above the L-shaped frame, a slide seat is arranged on the right side of the L-shaped frame, and the slide seat is slidably connected to a track arranged on the side bracket.

[0012] A plurality of positioning columns are evenly spaced on both sides of the L-shaped frame, telescopic cylinders are arranged on both sides of the side bracket, a moving block is arranged on the left side of the telescopic cylinder, and a positioning tongue engaged with the positioning column is arranged on the left side of the moving block.

[0013] A method for using a tap switch maintenance device, using the tap switch maintenance device as described above to complete the maintenance operation of the tap switch, comprises the following steps: Step 1: The construction personnel push the tap changer maintenance device to the tap changer position of the transformer, ground the tap changer maintenance device on site, and fix it through the lifting base; Step 2: The operator puts in the oil-proof pad, cleans the transformer oil of the tap changer, and removes the fixing studs of the tap changer; Step 3: Adjust the direction of the arm crane by rotating the adjustment mechanism to the position of the tap changer, then move the monorail lifting trolley to the top of the tap changer, and lift the tap changer by using the lifting rope and the anti-drop hook fixedly connected to the lifting buckle for inspection and cleaning after inspection; Step 4: Place the tap changer in the oil collecting box of the oil collecting mechanism and drain it. After the tap changer is drained, use the monorail lifting trolley and the rotating adjustment mechanism to change the position of the anti-drop hook and the lifted tap changer, and lift it and place it on the spare bracket for standby use; Step 5: After cleaning the inside of the main transformer tap changer barrel, place the tap changer into the main transformer tap changer barrel, add qualified transformer oil, quickly connect the motor and gas relay aviation plugs, cover the tap changer cover, add transformer oil to the tap changer oil pillow, deflate the gas relay several times, and after the inspection and cleaning tasks are completed, the staff will evacuate the site.

[0014] Beneficial effects of the invention: The invention provides a tap switch maintenance device and a method of use. During use, the construction personnel push the tap switch maintenance device to the tap switch position of the transformer, and ground the tap switch maintenance device on site, and fix it through a lifting base, and open the square tube through the hinged seat so that the square tube extends outward along the four corners of the square seat, which greatly improves the overall mechanical strength and stability. Figure 2As shown, the electric-controlled strong magnetic foot is adjusted by manually adjusting the screw (in actual use, an electric telescopic rod or electric lead screw / screw and other structures can also be used to replace the manual adjustment action) so that the electric-controlled strong magnetic foot is closely fitted with the top surface of the transformer cover, and then the electric-controlled strong magnetic foot is started, and the lifting base is stably adsorbed on the top cover of the transformer through the electric-controlled strong magnetic foot; the operator pads the oil-proof pad, cleans the transformer oil of the tap changer, and removes the fixing studs of the tap changer; adjust the direction of the arm crane by rotating the adjustment mechanism to adjust it to the position of the tap changer, and then move the monorail lifting trolley to the top of the tap changer, and lift the tap changer for inspection through the lifting rope and the anti-drop hook fixedly connected to the lifting buckle. Clean after maintenance; place the tap changer in the oil collecting box of the oil collecting mechanism to drain. After the tap changer is drained, change the position of the anti-drop hook and the lifted tap changer through the cooperation of the monorail lifting trolley and the rotating adjustment mechanism, lift it and place it on the spare bracket for standby use; after the inside of the main transformer tap changer barrel is cleaned, place the tap changer in the main transformer tap changer barrel, add qualified transformer oil, quickly connect the motor and the gas relay aviation plug, cover the tap changer cover, add transformer oil to the oil pillow of the tap changer, deflate the gas relay several times, and after the maintenance and cleaning tasks are completed, the staff evacuates the site; the present invention has the advantages of reasonable structure, easy maintenance, waste oil recovery, improved work efficiency and good safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the present invention.

[0016] Figure 2 It is a structural schematic diagram of the lifting base of the present invention.

[0017] Figure 3 For the present invention Figure 1 Schematic diagram of part of the structure.

[0018] Figure 4 For the present invention Figure 3 Schematic diagram of part of the structure.

[0019] Figure 5 It is a structural schematic diagram of the anti-drop hook of the present invention.

[0020] Figure 6 It is a three-dimensional diagram of the anti-drop hook of the present invention.

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

[0022] Figure 8 It is a three-dimensional diagram of the oil collecting mechanism of the present invention.

[0023] In the figure: 1, lifting base 11, square seat 12, handle 13, universal wheel 14, articulated seat 15, square tube 16, electric control strong magnetic foot 17, manual adjustment screw 2, column 3, reinforced base 4, arm crane 41, hanging beam 42, inclined rod 43, stabilizer bar 5, rotation adjustment mechanism 51, rotating column 52, bearing seat 53, flange gear motor 54, large gear 6, monorail lifting trolley 61, roller trolley 62, winch 63, travel drive motor 7, lifting rope 71, lifting buckle 8, anti-drop hook 81, Lifting handle 82, U-shaped ring 83, pin 84, limiting slot 85, snap ring 86, double hook plate 87, single hook plate 88, axle pin 89, positioning pin 9, spare bracket 91, frame 92, rectangular frame 93, diagonal brace 94, support rod 95, connecting plate 96, bolt seat 10, oil collecting mechanism 101, base plate 102, side bracket 103, L-shaped frame 104, lifting cylinder 105, oil collecting box 106, track 107, slide seat 108, positioning column 109, telescopic cylinder 110, moving block 111, positioning tongue. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings. Example

[0025] like Figure 1-8 As shown, a tap changer maintenance device comprises a lifting base 1 and an arm crane 4, wherein a column 2 is arranged above the lifting base 1, and the bottom of the column 2 is mounted on the lifting base 1 through a reinforcing base 3, and an arm crane 4 is arranged on one side of the upper part of the column 2, and the arm crane 4 is movably connected with the column 2 through a rotating adjustment mechanism 5, and the direction of the arm crane 4 is adjusted by the rotating adjustment mechanism 5; a monorail lifting trolley 6 is slidably installed below the arm crane 4, and a lifting rope 7 is arranged below the monorail lifting trolley 6, and a lifting buckle 71 is installed at the free end of the lifting rope 7, and an anti-drop hook 8 is installed on the lifting buckle 71; a spare bracket 9 is arranged at the lower part of one side of the column 2 corresponding to the arm crane 4, which is used to place the drained tap changer for standby.

[0026] The lifting base 1 includes a square seat 11 for installing the reinforced base 3, a handle 12 is provided on one side of the square seat 11, universal wheels 13 are provided at the four corners of the bottom of the square seat 11, hinged seats 14 are provided on the outer sides of the four corners of the square seat 11, square tubes 15 are hinged inside the hinged seats 14, and manual adjustment screws 17 are provided at the outer ends of the square tubes 15. The manual adjustment screws 17 pass through the lower end of the square tubes 15 and are installed with electric-controlled strong magnetic foot seats 16.

[0027] The arm crane 4 includes a suspension beam 41 , on which an inclined rod 42 is arranged upwardly inclined, and the inclined rod 42 is connected to the suspension beam 41 via a plurality of stabilizing rods 43 .

[0028] The rotation adjustment mechanism 5 includes a rotating column 51, the upper and lower parts of which are fixedly connected to the corresponding inclined rods 42 and the hanging beams 41 respectively, and bearing seats 52 are provided at the upper and lower ends of the rotating column 51. A flange-type gear motor 53 is provided on one side above the rotating column 51, and a large gear 54 meshing with the flange-type gear motor 53 is installed on the bearing seat 52 above the rotating column 51.

[0029] In this embodiment, the working principle of the rotation adjustment mechanism is: start the flange-type gear motor, and the flange-type gear motor drives the rotating column to rotate through the large gear, thereby driving the arm crane to rotate, and then adjusting the lifting direction of the arm crane, so as to facilitate adaptive adjustment according to the position of the tap switch, thereby greatly improving the practicality of the present invention.

[0030] The monorail lifting trolley 6 includes a roller trolley 61 that is rollingly connected to the suspension beam 41, a winch 62 is arranged below the roller trolley 61, and the winch 62 is wound and connected to the suspension rope 7, and a travel drive motor 63 is arranged behind the roller trolley 61 for driving the roller trolley 61 to move along the suspension beam 41.

[0031] In this embodiment, the working principle of the monorail lifting trolley is: start the travel drive motor, and the travel drive motor drives the roller trolley to move forward and backward along the lifting beam, so as to adjust the specific lifting position of the lifting rope and the anti-drop hook, so as to facilitate the adjustment of the lifting distance according to the position of the maintenance switch. It is easy to use and quick to adjust.

[0032] The anti-drop hook 8 includes a group of hanging handles 81, the upper ends of the group of hanging handles 81 are cross-connected and separated at the lower ends, the upper ends of the hanging handles 81 are installed with a U-shaped ring 82 connected to the hanging buckle 71, and the U-shaped ring 82 is connected to the hanging handle 81 through a pin shaft 83, and the lower part of the hanging handle 81 is provided with a limiting card groove 84, and the outer side of the limiting card groove 84 is detachably clamped with a snap ring 85; the lower end of the hanging handle 81 is movably installed with a double hook plate 86 and a single hook plate 87, and the double hook plate 86 and the single hook plate 87 are connected by an axle pin 88, and a positioning pin 89 is provided above the axle pin 88.

[0033] The lifting hook of this embodiment works as follows: first, the lower ends of the double hook plate and the single hook plate are inserted into the lifting ring of the tap switch, and then the lifting rope is lifted. The lifting rope pulls the separation part of the lower end of the lifting handle through the U-shaped ring and the intersection part of the upper end of the lifting handle, and then the double hook plate and the single hook plate are pulled upward through the lower end of the lifting handle respectively. Since the double hook plate and the single hook plate are connected in an "X" shape through the axle pin, the lower ends of the double hook plate and the single hook plate can be pulled close to each other, and the lower end of the single hook plate enters into the lower end of the double hook plate to form a closed space. At this time, the double hook plate and the single hook plate are in a locked state, and the lifting ring of the tap switch is locked. Then, the locking state of the double hook plate and the single hook plate is maintained by the positioning pin, and then the snap ring is sleeved in the limit slot of the lifting handle to position the lifting handle, further ensuring that the double hook plate and the single hook plate lock the lifting ring of the tap switch stably and reliably, effectively avoiding unhooking, and greatly improving the safety of the device of the present invention when in use.

[0034] The spare bracket 9 includes a horizontally arranged frame 91, a vertically arranged rectangular frame 92 is installed below the frame 91, and both ends of the rectangular frame 92 are connected to the frame 91 through diagonal braces 93; a downwardly inclined support rod 94 is arranged in the middle of the rectangular frame 92, and one end of the support rod 94 is connected to the frame 91 through a connecting plate 95, and the connection between the connecting plate 95 and the frame 91 and the connection between the connecting plate 95 and the support rod 94 are fixedly connected to the column 2 through bolt seats 96.

[0035] A tap switch maintenance device also includes an oil collecting mechanism 10, the oil collecting mechanism 10 includes a base plate 101, a side bracket 102 is arranged on one side above the base plate 101, an L-shaped frame 103 is arranged on the left side of the side bracket 102, a lifting cylinder 104 is arranged below the L-shaped frame 103, and an oil collecting box 105 is arranged above the L-shaped frame 103, a slide seat 107 is arranged on the right side of the L-shaped frame 103, and the slide seat 107 is slidably connected to a track 106 arranged on the side bracket 102.

[0036] A plurality of positioning posts 108 are evenly spaced on both sides of the L-shaped frame 103 , and telescopic cylinders 109 are provided on both sides of the side bracket 102 . A moving block 110 is provided on the left side of the telescopic cylinder 109 , and a positioning tongue 111 engaged with the positioning post 108 is provided on the left side of the moving block 110 .

[0037] In this embodiment, the working principle of the oil collecting mechanism is as follows: the oil collecting mechanism can collect the transformer insulating waste oil through the oil collecting box to realize waste oil recovery; it can also realize the draining operation of the tap switch in the oil collecting box; because the L-shaped frame is slidably connected to the track on the side bracket through the slide seat, the height of the oil collecting box can be adjusted by the lifting cylinder, so as to facilitate adaptive adjustment according to the amount of liquid in the oil collecting box during the draining process of the tap switch, so as to avoid the tap switch contacting the liquid in the oil collecting box, resulting in failure to drain quickly; and it can also adjust the height change of the tap switch extending out of the oil collecting box (the height ratio change of the tap switch in contact with the natural environment and in the oil collecting box), so as to improve the draining speed in the natural state and the work efficiency without liquid splashing during the draining process.

[0038] The present invention is a tap switch maintenance device and a method for using the same. During use, the construction personnel push the tap switch maintenance device to the tap switch position of the transformer, and ground the tap switch maintenance device on site, and fix it through the lifting base 1, and open the square tube 15 through the hinge seat 14, so that the square tube 15 extends outward along the four corners of the square seat 11, which greatly improves the overall mechanical strength and stability. Figure 2 As shown, the electric-controlled strong magnetic foot 16 is adjusted by manually adjusting the screw 17 (in actual use, an electric telescopic rod or an electric lead screw / screw and other structures can also be used to replace the manual adjustment action) so that the electric-controlled strong magnetic foot 16 is tightly fitted with the top surface of the transformer cover, and then the electric-controlled strong magnetic foot 16 is started, and the lifting base is stably adsorbed on the top cover of the transformer through the electric-controlled strong magnetic foot 16; the operator pads the oil-proof pad, cleans the transformer oil of the tap changer, and removes the fixing studs of the tap changer; adjusts the direction of the arm crane 4 by rotating the adjustment mechanism 5 to adjust it to the position of the tap changer, and then moves the monorail lifting trolley 6 to the top of the tap changer, and lifts the tap changer through the lifting rope 7 and the anti-drop hook 8 fixedly connected to the lifting buckle 71, and then enters. Carry out inspection and clean after maintenance; put the tap changer in the oil collecting box 105 of the oil collecting mechanism 10 to drain. After the tap changer is drained, the anti-drop hook 8 and the lifted tap changer are changed through the monorail lifting trolley 6 and the rotating adjustment mechanism 5, and the tap changer is lifted and placed on the spare bracket 9 for standby use; after the inside of the main transformer tap changer barrel is cleaned, the tap changer is placed in the main transformer tap changer barrel, and qualified transformer oil is added. The motor and the gas relay aviation plug are quickly connected, the tap changer cover is covered, the transformer oil is added to the oil pillow of the tap changer, and the gas relay is deflated for many times. After the maintenance and cleaning tasks are completed, the staff evacuates the site; the present invention has the advantages of reasonable structure, convenient maintenance, waste oil recovery, improved work efficiency and good safety. Example

[0039] like Figure 1-8As shown, a method for using a tap switch maintenance device, using the tap switch maintenance device as described above to complete the maintenance operation of the tap switch, includes the following steps: Step 1: The construction personnel push the tap changer maintenance device to the tap changer position of the transformer, ground the tap changer maintenance device on site, and fix it through the lifting base; Step 2: The operator puts in the oil-proof pad, cleans the transformer oil of the tap changer, and removes the fixing studs of the tap changer; Step 3: Adjust the direction of the arm crane by rotating the adjustment mechanism to the position of the tap changer, then move the monorail lifting trolley to the top of the tap changer, and lift the tap changer by using the lifting rope and the anti-drop hook fixedly connected to the lifting buckle for inspection and cleaning after inspection; Step 4: Place the tap changer in the oil collecting box of the oil collecting mechanism and drain it. After the tap changer is drained, use the monorail lifting trolley and the rotating adjustment mechanism to change the position of the anti-drop hook and the lifted tap changer, and lift it and place it on the spare bracket for standby use; Step 5: After cleaning the inside of the main transformer tap changer barrel, place the tap changer into the main transformer tap changer barrel, add qualified transformer oil, quickly connect the motor and gas relay aviation plugs, cover the tap changer cover, add transformer oil to the tap changer oil pillow, deflate the gas relay several times, and after the inspection and cleaning tasks are completed, the staff will evacuate the site.

Claims

1. A tap changer maintenance device, comprising a lifting base and an arm-type lifting machine, characterized in that: A column is arranged above the lifting base, and the bottom of the column is installed on the lifting base through a reinforced base, and an arm crane is arranged on one side of the upper part of the column, and the arm crane is movably connected with the column through a rotating adjustment mechanism, and the direction of the arm crane is adjusted by the rotating adjustment mechanism; a monorail lifting trolley is slidably installed below the arm crane, and a lifting rope is arranged below the monorail lifting trolley, and a lifting buckle is installed at the free end of the lifting rope, and an anti-drop hook is installed on the lifting buckle; a spare bracket is arranged at the lower part of one side of the column corresponding to the arm crane, which is used to place the drained tap switch for standby.

2. A tap changer maintenance device according to claim 1, characterized in that: The lifting base includes a square seat for installing a reinforced base, a handle is arranged on one side of the square seat, universal wheels are arranged at the four corners of the bottom of the square seat, hinged seats are arranged on the outer sides of the four corners of the square seat, square tubes are hinged inside the hinged seats, manual adjustment screws are arranged at the outer ends of the square tubes, and the lower ends of the manual adjustment screws passing through the square tubes are installed with electric-controlled strong magnetic foot seats.

3. A tap changer maintenance device according to claim 2, characterized in that: The arm crane comprises a suspension beam, an inclined rod is arranged upwardly inclined on the suspension beam, and the inclined rod is connected to the suspension beam through a plurality of stabilizing rods.

4. A tap changer maintenance device according to claim 3, characterized in that: The rotation adjustment mechanism includes a rotating column, the upper and lower parts of which are fixedly connected to the corresponding inclined rods and suspension beams respectively, bearing seats are provided at the upper and lower ends of the rotating column, a flange-type gear motor is provided on one side above the rotating column, and a large gear meshing with the flange-type gear motor is installed on the bearing seat above the rotating column.

5. A tap changer maintenance device according to claim 4, characterized in that: The monorail lifting trolley includes a roller trolley that is rollingly connected to the hanging beam, a winch is arranged below the roller trolley, the winch is wound and connected with the hanging rope, and a travel drive motor is arranged behind the roller trolley for driving the roller trolley to move along the hanging beam.

6. A tap changer maintenance device according to claim 5, characterized in that: The anti-drop hook includes a group of lifting handles, wherein the upper ends of the lifting handles are cross-connected and the lower ends are separated, a U-shaped ring connected to the lifting buckle is installed on the upper end of the lifting handle, and the U-shaped ring is connected to the lifting handle through a pin shaft, and a limiting slot is provided at the lower part of the lifting handle, and a clamping ring is detachably connected to the outside of the limiting slot; a double hook plate and a single hook plate are movably installed at the lower end of the lifting handle, and the double hook plate and the single hook plate are connected by an axle pin, and a positioning pin is provided above the axle pin.

7. A tap changer maintenance device according to claim 6, characterized in that: The spare bracket includes a horizontally arranged frame, a vertically arranged rectangular frame is installed below the frame, and both ends of the rectangular frame are connected to the frame through diagonal braces; a downwardly inclined support rod is arranged in the middle of the rectangular frame, and one end of the support rod is connected to the frame through a connecting plate, and the connection between the connecting plate and the frame and the connection between the connecting plate and the support rod are fixedly connected to the column through bolt seats.

8. The tap changer maintenance device according to claim 7, further comprising an oil collecting mechanism, characterized in that: The oil collecting mechanism includes a base plate, a side bracket is arranged on one side above the base plate, an L-shaped frame is arranged on the left side of the side bracket, a lifting cylinder is arranged below the L-shaped frame, an oil collecting box is arranged above the L-shaped frame, a sliding seat is arranged on the right side of the L-shaped frame, and the sliding seat is slidably connected to a track arranged on the side bracket.

9. A tap changer maintenance device according to claim 8, characterized in that: A plurality of positioning columns are evenly spaced on both sides of the L-shaped frame, telescopic cylinders are arranged on both sides of the side bracket, a moving block is arranged on the left side of the telescopic cylinder, and a positioning tongue engaged with the positioning column is arranged on the left side of the moving block.

10. A method for using a tap switch maintenance device, using the tap switch maintenance device according to any one of claims 1 to 9 to complete the maintenance operation of the tap switch, characterized in that: The following steps are involved: Step 1: The construction personnel push the tap changer maintenance device to the tap changer position of the transformer, ground the tap changer maintenance device on site, and fix it through the lifting base; Step 2: The operator puts in the oil-proof pad, cleans the transformer oil of the tap changer, and removes the fixing studs of the tap changer; Step 3: Adjust the direction of the arm crane by rotating the adjustment mechanism to the position of the tap changer, then move the monorail lifting trolley to the top of the tap changer, and lift the tap changer by using the lifting rope and the anti-drop hook fixedly connected to the lifting buckle for inspection and cleaning after inspection; Step 4: Place the tap changer in the oil collecting box of the oil collecting mechanism and drain it. After the tap changer is drained, use the monorail lifting trolley and the rotating adjustment mechanism to change the position of the anti-drop hook and the lifted tap changer, and lift it and place it on the spare bracket for standby use; Step 5: After cleaning the inside of the main transformer tap changer barrel, place the tap changer into the main transformer tap changer barrel, add qualified transformer oil, quickly connect the motor and gas relay aviation plugs, cover the tap changer cover, add transformer oil to the tap changer oil pillow, deflate the gas relay several times, and after the inspection and cleaning tasks are completed, the staff will evacuate the site.

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