Transformer on-load tap-changer hanging core overhauling device and overhauling method thereof

Abstract

The invention belongs to the technical field of power equipment maintenance, and particularly relates to a transformer on-load tap-changer hoisting core maintenance device and a maintenance method thereof.The transformer on-load tap-changer hoisting core maintenance device comprises a base, an electric sliding rail, a sliding seat and a hoisting mechanism, the hoisting mechanism is arranged on the bottom face of the sliding seat, and the hoisting mechanism comprises a supporting part and a hoisting part; the shell is fixedly connected to the top surface of the base; the cleaning mechanism is arranged on the shell; wherein the cleaning mechanism comprises a shell, the shell is arranged on the top surface of the shell, a driving part is arranged in the shell, a cleaning part is arranged in the shell, an air drying part is further arranged on the shell, a limiting column is fixedly connected to the top surface of the shell, a clamping part is arranged on the driving part, and the air drying part is arranged on the clamping part. And a control part is arranged on the inner wall of the shell. According to the invention, the maintenance efficiency can be improved, the requirement of manual intervention is reduced, and the whole maintenance process is quicker and more efficient.

Description

Technical Field

[0001] The invention belongs to the technical field of power equipment maintenance, and in particular relates to a transformer on-load tap changer hanging core maintenance device and a maintenance method thereof. Background Art

[0002] The transformer on-load tap changer is a key component in the power system for regulating the transformer output voltage. In order to ensure its reliable operation, it needs to be regularly inspected and maintained. However, most existing inspection and maintenance methods rely on manpower, which has problems such as cumbersome operation, low efficiency, and insufficient safety. In addition, since the tap changer hanging core is usually located inside the transformer, it needs to be separated from the transformer body during the inspection and maintenance process, which often takes a lot of time and manpower.

[0003] In order to save manpower and improve maintenance efficiency, detection equipment is generally used for auxiliary maintenance. In the prior art, there are also many types of core hanging maintenance devices, such as a transformer core hanging maintenance tool and maintenance method with application number: CN202211228725.7; the invention provides a transformer core hanging maintenance tool and maintenance method. In the process of moving the winding from the transformer to the top of the maintenance platform, the double-headed motor is always in a forward rotation state, and only the extension and retraction of the telescopic cylinder needs to be controlled. When the winding moves from the surface of the maintenance platform to the top of the transformer, the double-headed motor is always in a forward rotation state, and only the extension and retraction of the telescopic cylinder needs to be controlled. The maintenance movement process of the transformer can be completed by a set of driving equipment, and the control is simple.

[0004] Although the above equipment has achieved the function of hoisting, it is not difficult to find that there are still some shortcomings in the actual use process. For example: after the traction rope is used for connection and hoisting, during the moving stage, under the influence of gravity, the hanging core often rotates or shakes, resulting in poor stability during the moving process. In addition, during routine maintenance preparation work, the staff needs to manually wipe the hanging core with a rag. This process is not only time-consuming and labor-intensive, but also exposes the hanging core to the external environment for a long time, which may reduce the overall safety performance of the equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a transformer on-load tap changer hanging core maintenance device and maintenance method thereof, which can improve the maintenance efficiency, reduce the need for manual intervention, and make the entire maintenance process more rapid and efficient.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A transformer on-load tap changer hanging core maintenance device, comprising a base;

[0008] An electric slide rail, wherein the electric slide rail is fixedly connected to the upper end of the base through a support rod;

[0009] A sliding seat, wherein the sliding seat is slidably connected to the electric slide rail;

[0010] A hoisting mechanism, which is arranged on the bottom surface of the sliding seat and is used to hoist the hanging core that needs to be repaired, and the hoisting mechanism includes a supporting part and a hoisting part;

[0011] A shell, wherein the shell is fixedly connected to the top surface of the base;

[0012] A cleaning mechanism, wherein the cleaning mechanism is disposed on the housing;

[0013] Among them, the cleaning mechanism includes a shell, which is arranged on the top surface of the outer shell, and a driving part is arranged inside the outer shell. A cleaning part is arranged inside the shell for cleaning the hanging core that needs to be inspected. An air drying part is also arranged on the shell for air-drying the hanging core after cleaning. A limiting column is fixedly connected to the top surface of the outer shell, and the upper end of the limiting column is in a pointed cone shape. A clamping part is arranged on the driving part, and a control part is arranged on the inner wall of the outer shell.

[0014] In a preferred embodiment, the support part includes a hydraulic electric push rod, which is fixedly mounted on a sliding seat, the lower end of the hydraulic electric push rod is fixedly connected to a fixed disk, one side of the fixed disk is rotatably connected to a rotating disk, a rotating motor is fixedly mounted on the fixed disk, and the output shaft of the rotating motor is fixedly connected to the rotating disk, one side of the rotating disk is fixedly connected to a support seat through a support rod, one side of the support seat is rotatably connected to a positioning plate, the side of the support seat is also fixedly connected to a hollow cylinder, the lower end of the hollow cylinder is slidably plugged with a top seat, and a compression spring is fixedly connected between the top seat and the hollow cylinder.

[0015] In a preferred embodiment, the lifting part includes a winding roller, which is rotatably connected to a support seat, a winding motor is installed on the support seat, and the output shaft of the winding motor is connected to one end of the winding roller, a traction rope is wound around the winding roller, and the traction rope passes through a through hole opened on the support seat to the bottom of the support seat, and the lower end of the traction rope is connected to a hook.

[0016] In a preferred embodiment, the shell includes a fixing plate, which is fixedly connected to the top surface of the outer shell, and both ends of the fixing plate are slidably connected to extension plates, and the lower end of the extension plate is provided with a tooth groove, and a round rod is rotatably connected to the outer shell, one end of the round rod is installed with a first transmission gear, and the other end of the round rod is installed with a first bevel gear.

[0017] In a preferred embodiment, the driving part includes a driving motor, which is fixedly mounted on the bottom surface of the inner cavity of the outer shell, and the upper end of the output shaft of the driving motor is fixedly connected to the first rotating shaft, and the second transmission gear and the second bevel gear are installed on the first rotating shaft. The bottom surface of the inner cavity of the outer shell is rotatably connected to the second rotating shaft through a support, and the third bevel gear and the fourth bevel gear are respectively installed at both ends of the second rotating shaft, and the top surface of the inner cavity of the outer shell is rotatably connected to the ring gear.

[0018] In a preferred embodiment, the cleaning part includes a first hollow ring, which is fixedly connected to the bottom surface of the inner cavity of the outer shell by a support rod, and the first hollow ring is rotatably connected to the second hollow ring through a sealed bearing, and the first hollow ring and the second hollow ring are connected to each other, and the second hollow ring is rotatably connected to the hollow rod, and the hollow rod is provided with nozzles distributed in an array, and a third transmission gear is fixedly installed on the lower end of the hollow rod, and a water pump is fixedly installed on the back of the base, the water pumping end of the water pump is connected to the cavity on the base, and the water discharge end of the water pump is connected to the first hollow ring.

[0019] In a preferred embodiment, the air dry section includes an air storage cavity, which is opened on a fixed plate, and air outlet holes are arranged in an array at the air storage cavity. A ventilation hood is fixedly connected to the back side of the fixed plate, and an air inlet groove is opened at the lower end of the ventilation hood. A rotating rod is rotatably connected to the ventilation hood, a fan blade is installed at one end of the rotating rod, and a fourth transmission gear is installed at the other end of the rotating rod. A heating wire is installed at the upper end of the ventilation hood, and an air supply pipeline is connected to the upper end of the ventilation hood, and the upper end of the air supply pipeline is connected to the air storage cavity.

[0020] In a preferred embodiment, the clamping portion includes an annular groove, which is provided on the second bevel gear, an annular slider is slidably connected in the annular groove, and the annular slider is fixedly connected to the first rotating shaft, movable grooves are provided in an annular shape on the annular slider, a locking block is inserted in the movable groove, and one end of the locking block is semicircular, a spring is fixedly connected between the locking block and the movable groove, and locking grooves are provided in annular shape in the annular groove, and the locking grooves are also semicircular.

[0021] In a preferred embodiment, the control unit includes a first electric telescopic rod and a second electric telescopic rod, both of which are fixedly mounted on the inner wall of the outer shell, the telescopic end of the first electric telescopic rod is fixedly connected to a first clamp, and the telescopic end of the second electric telescopic rod is fixedly connected to a second clamp.

[0022] A method for inspecting and repairing a transformer on-load tap changer hanging core, applied to the above-mentioned transformer on-load tap changer hanging core inspection and repair device, comprises the following steps: step 1, operating the hydraulic electric push rod to extend, driving the support part and the hanging part to move downward, and hanging the hook on the hanging core;

[0023] Step 2: Start the winding motor to drive the hanging core to rise steadily and make it contact with the top seat to achieve limit stability;

[0024] Step 3: Control the hydraulic electric push rod to shorten, drive the hoisting part and the lifting core to rise as a whole, and complete the lifting of the lifting core;

[0025] Step 4: The electric slide rail drives the sliding seat to move so that the hanging core is positioned above the cleaning mechanism; the hydraulic electric push rod extends to place the hanging core into the housing;

[0026] Step 5: Start the drive motor and unfold the extension plate through the gear transmission system to form a closed space to protect the hanging core;

[0027] Step 6: The first electric telescopic rod drives the first clamping block to fix the gear ring, and the water pump is started to spray the cleaning liquid to circulate and clean the surface of the hanging core;

[0028] Step 7: Adjust the second electric telescopic rod, fix the second hollow ring, start the hot air drying system, and combine with the rotating motor to achieve all-round air drying;

[0029] Step 8: Reverse the rotation of the drive motor, retract the extension plate, and open up space for subsequent maintenance operations.

[0030] The technical effects achieved by the present invention are:

[0031] The present invention significantly improves the efficiency of maintenance through a series of operations such as automated lifting, cleaning, and drying, reduces the need for manual intervention, and makes the entire maintenance process faster and more efficient;

[0032] The present invention adopts automated equipment to replace traditional manual operation, thus avoiding the potential safety hazard caused by manual handling. At the same time, through the limit design of the hanging core during the lifting and moving process, the shaking of the hanging core is effectively reduced, thereby enhancing the safety of the maintenance process.

[0033] The present invention not only saves time but also avoids the pollution that may be introduced in the manual wiping process through the automated cleaning and drying process, thereby improving the quality of maintenance and extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 It is a rear view of the overall structure of the present invention;

[0036] Figure 3 It is a structural schematic diagram of the hanging mechanism of the present invention;

[0037] Figure 4 The present invention Figure 3A front cross-sectional view of

[0038] Figure 5 It is a schematic diagram of the connection between the cleaning mechanism and the housing of the present invention;

[0039] Figure 6 The present invention Figure 5 Schematic diagram of the structure inside the middle shell;

[0040] Figure 7 The present invention Figure 6 Bottom sectional view of

[0041] Figure 8 The present invention Figure 6 A side sectional view of

[0042] Fig. 9 is a schematic diagram of the connection between the hollow rod and the second hollow ring of the present invention;

[0043] Fig.10 is a side sectional view of the base of the present invention;

[0044] Fig.11 It is a partial structural schematic diagram of the air pipe section of the present invention;

[0045] Fig.12 It is a structural schematic diagram of the clamping part of the present invention;

[0046] Fig.13 The present invention Fig.12 An enlarged schematic diagram of part B shown in;

[0047] Fig.14 The present invention Figure 6 An enlarged schematic diagram of part A is shown in FIG.

[0048] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0049] 1. Base; 2. Electric slide rail; 3. Sliding seat; 4. Lifting mechanism; 5. Shell; 6. Cleaning mechanism;

[0050] 41. Supporting part; 42. Hoisting part;

[0051] 411, hydraulic electric push rod; 412, fixed plate; 413, rotating plate; 414, rotating motor; 415, supporting seat; 416, positioning plate; 417, hollow cylinder; 418, top seat; 419, compression spring;

[0052] 421, winding roller; 422, winding motor; 423, traction rope; 424, hook;

[0053] 61. housing; 62. drive unit; 63. cleaning unit; 64. air dryer; 65. limit column; 66. clamping unit; 67. control unit;

[0054] 611, fixed plate; 612, extension plate; 613, round rod; 614, first transmission gear; 615, first bevel gear;

[0055] 621, driving motor; 622, first rotating shaft; 623, second transmission gear; 624, second bevel gear; 625, second rotating shaft; 626, fourth bevel gear; 627, third bevel gear; 628, ring gear;

[0056] 631, first hollow ring; 632, second hollow ring; 633, hollow rod; 634, third transmission gear; 635, water pump;

[0057] 641, air storage chamber; 642, ventilation hood; 643, rotating rod; 644, fan blade; 645, fourth transmission gear; 646, heating wire; 647, gas transmission pipeline;

[0058] 661, annular slide groove; 662, annular slide block; 663, movable groove; 664, locking block; 665, spring; 666, locking groove;

[0059] 671, first electric telescopic rod; 672, first clamping block; 673, second electric telescopic rod; 674, second clamping block. DETAILED DESCRIPTION

[0060] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0061] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0062] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0063] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0064] Please see attached Figures 1 to 14 As shown, this embodiment provides a transformer on-load tap changer hanging core maintenance device, including a base 1;

[0065] The electric slide rail 2 is fixedly connected to the upper end of the base 1 through a support rod;

[0066] A sliding seat 3, wherein the sliding seat 3 is slidably connected to the electric slide rail 2;

[0067] A hoisting mechanism 4 is disposed on the bottom surface of the sliding seat 3 and is used to hoist the hanging core that needs to be repaired. The hoisting mechanism 4 includes a supporting portion 41 and a hoisting portion 42;

[0068] A housing 5, wherein the housing 5 is fixedly connected to the top surface of the base 1;

[0069] A cleaning mechanism 6, the cleaning mechanism 6 is arranged on the housing 5;

[0070] Among them, the cleaning mechanism 6 includes a shell 61, which is arranged on the top surface of the outer shell 5. A driving part 62 is arranged inside the outer shell 5. A cleaning part 63 is arranged inside the shell 61 for cleaning the hanging core that needs to be inspected. An air drying part 64 is also arranged on the shell 61 for air-drying the hanging core after cleaning. A limiting column 65 is fixedly connected to the top surface of the outer shell 5, and the upper end of the limiting column 65 is in a pointed cone shape. A clamping part 66 is arranged on the driving part 62, and a control part 67 is arranged on the inner wall of the outer shell 5.

[0071] In this embodiment, during maintenance, the operator first starts the electric slide rail 2 to move the sliding seat 3 to a suitable position along the electric slide rail 2. Then, the operator controls the hoisting mechanism 4 to accurately hoist the hanging core to be repaired to the specified position.

[0072] After the hanging core is hoisted in place, the operator starts the cleaning mechanism 6, and the cleaning part 63 in the housing 61 starts to clean the hanging core. After the cleaning is completed, the air dryer 64 is started to air dry the cleaned hanging core.

[0073] The design of the entire maintenance device fully considers the convenience of operation and the high efficiency of maintenance, which greatly improves the maintenance efficiency and safety.

[0074] It should be added that a cavity is provided inside the base 1 for storing cleaning liquid. A liquid drop hole is provided on the top surface of the base 1 and inside the housing 5 so that the cleaning liquid after use can flow back into the cavity on the base 1. In addition, a filter screen is provided at the pumping end of the water pump 635 to prevent impurities from being sucked into the water pump 635.

[0075] Next, please refer to Figure 1 and Figure 2The support part 41 includes a hydraulic electric push rod 411, which is fixedly mounted on the sliding seat 3. The lower end of the hydraulic electric push rod 411 is fixedly connected to a fixed disk 412, and one side of the fixed disk 412 is rotatably connected to a rotating disk 413. A rotating motor 414 is fixedly mounted on the fixed disk 412, and the output shaft of the rotating motor 414 is fixedly connected to the rotating disk 413. One side of the rotating disk 413 is fixedly connected to a support seat 415 through a support rod, and one side of the support seat 415 is rotatably connected to a positioning disk 416. The side of the support seat 415 is also fixedly connected to a hollow cylinder 417 The lower end of the hollow cylinder 417 is slidably plugged with a top seat 418, and a compression spring 419 is fixedly connected between the top seat 418 and the hollow cylinder 417, wherein the lifting part 42 includes a winding roller 421, and the winding roller 421 is rotatably connected to the support seat 415, and a winding motor 422 is installed on the support seat 415, and the output shaft of the winding motor 422 is connected to one end of the winding roller 421, and a traction rope 423 is wound around the winding roller 421, and the traction rope 423 passes through the through hole opened on the support seat 415 to the bottom of the support seat 415, and the lower end of the traction rope 423 is connected to a hook 424.

[0076] In this embodiment, the hydraulic electric push rod 411 is first operated to extend, thereby driving the support part 41 and the hoisting part 42 to move downward synchronously. Subsequently, the hook 424 is firmly hung on the hanging core. Next, the winding motor 422 is started to drive the winding roller 421 to rotate to realize the winding action, thereby driving the hanging core to rise steadily. During the lifting process, the upper end of the hanging core will gradually contact the bottom surface of the top seat 418, and push the top seat 418 to move upward, while compressing the compression spring 419. When the hanging core cannot continue to rise, its upper end will fit tightly against the bottom surface of the top seat 418, realizing effective position limiting of the hanging core, ensuring the stability of the hanging core during movement, reducing shaking, and thus improving the safety and reliability of the lifting operation. Finally, the hydraulic electric push rod 411 is controlled to shorten, so as to drive the hoisting part 42 and the suspended hanging core to rise together, and complete the lifting operation of the hanging core.

[0077] The electric slide rail 2 drives the sliding seat 3 to move to the right until the hanging core is positioned just above the cleaning mechanism 6. Subsequently, the hydraulic electric push rod 411 extends, causing the hanging mechanism 4 to descend, and ensuring that the slots on the positioning plate 416 are accurately aligned with the limiting column 65 and plugged.

[0078] Next, please refer to Figure 5 and Figure 8 The shell 61 includes a fixed plate 611, which is fixedly connected to the top surface of the shell 5. Both ends of the fixed plate 611 are slidably connected with extension plates 612, and the lower end of the extension plate 612 is provided with a tooth groove. A round rod 613 is rotatably connected to the shell 5, one end of the round rod 613 is installed with a first transmission gear 614, and the other end of the round rod 613 is installed with a first bevel gear 615.

[0079] Please refer again Figures 5 to 7 The driving unit 62 includes a driving motor 621, which is fixedly mounted on the bottom surface of the inner cavity of the shell 5. The upper end of the output shaft of the driving motor 621 is fixedly connected to the first rotating shaft 622, and the second transmission gear 623 and the second bevel gear 624 are installed on the first rotating shaft 622. The bottom surface of the inner cavity of the shell 5 is rotatably connected to the second rotating shaft 625 through a support, and the third bevel gear 627 and the fourth bevel gear 626 are respectively installed at both ends of the second rotating shaft 625. The top surface of the inner cavity of the shell 5 is rotatably connected to the ring gear 628; wherein, the control unit 67 includes a first electric telescopic rod 671 and a second electric telescopic rod 673, and the first electric telescopic rod 671 and the second electric telescopic rod 673 are both fixedly mounted on the inner wall of the shell 5, and the telescopic end of the first electric telescopic rod 671 is fixedly connected to the first clamping block 672, and the telescopic end of the second electric telescopic rod 673 is fixedly connected to the second clamping block 674.

[0080] In this embodiment, the driving motor 621 is started to drive the first rotating shaft 622 to rotate, so that the second bevel gear 624 and the second transmission gear 623 rotate, and the second bevel gear 624 and the third bevel gear 627 are meshed and driven to drive the second rotating shaft 625 and the fourth bevel gear 626 thereon to rotate, and the fourth bevel gear 626 and the first bevel gear 615 are meshed and driven to drive the round rod 613 and the first transmission gear 614 thereon to rotate, and the first transmission gear 614 is meshed with the tooth groove at the lower end of the extension plate 612, so that the extension plate 612 slides along the fixed plate 611 and is fully extended, and finally merges to form a closed space, which surrounds and protects the hanging core, reducing its exposure to the outside world during the cleaning process.

[0081] Please refer again Figures 5 to 10 The cleaning portion 63 includes a first hollow ring 631, which is fixedly connected to the bottom surface of the inner cavity of the shell 5 by a support rod. The first hollow ring 631 is rotatably connected to the second hollow ring 632 through a sealed bearing, and the first hollow ring 631 and the second hollow ring 632 are connected to each other. The second hollow ring 632 is rotatably connected to a hollow rod 633, and nozzles are arranged in an array on the hollow rod 633. A third transmission gear 634 is fixedly installed at the lower end of the hollow rod 633. A water pump 635 is fixedly installed on the back of the base 1. The water pumping end of the water pump 635 is connected to the cavity on the base 1, and the water discharge end of the water pump 635 is connected to the first hollow ring 631.

[0082] In this embodiment, the first electric telescopic rod 671 extends, driving the first clamping block 672 to engage in the tooth groove of the gear ring 628, fixing the gear ring 628, driving the motor 621 to continue to work, and the second transmission gear 623 meshes with the third transmission gear 634 for transmission. At this time, the third transmission gear 634 will revolve and rotate along the second transmission gear 623, and the second transmission gear 623 rotates to drive the hollow rod 633, and the second transmission gear 623 revolves to drive the second hollow ring 632 to rotate along the first hollow ring 631. The water pump 635 is started to extract the cleaning liquid in the base 1, and transmit the cleaning liquid to the first hollow ring 631, and then enter the second hollow ring 632 from the first hollow ring 631, and then enter the hollow rod 633, and spray from the nozzle on the hollow rod 633 to wash the hanging core, remove surface impurities, and finally the cleaning liquid flows back into the cavity on the base 1. During this process, the cleaning liquid is recycled, and a filter screen is provided at the pumping end of the water pump 635 to prevent impurities from being sucked in.

[0083] It should be added that the outer ring of the second hollow ring 632 is provided with teeth in an annular distribution.

[0084] Please refer again Figure 5 and Fig.11 The air dryer 64 includes an air storage chamber 641, which is provided on the fixed plate 611, and air outlet holes are arranged in an array at the air storage chamber 641. A ventilation hood 642 is fixedly connected to the back of the fixed plate 611, and an air inlet slot is provided at the lower end of the ventilation hood 642. A rotating rod 643 is rotatably connected to the ventilation hood 642, a fan blade 644 is installed at one end of the rotating rod 643, and a fourth transmission gear 645 is installed at the other end of the rotating rod 643. A heating wire 646 is installed at the upper end of the ventilation hood 642, and an air supply pipe 647 is connected to the upper end of the ventilation hood 642, and the upper end of the air supply pipe 647 is connected to the air storage chamber 641.

[0085] In this embodiment, after cleaning is completed, the first electric telescopic rod 671 shortens to drive the first clamping block 672 to reset, and the second electric telescopic rod 673 extends to drive the second clamping block 674 to clamp onto the teeth of the second hollow ring 632 to fix its position. At this time, the second transmission gear 623 and the third transmission gear 634 are meshed and transmitted. Since the second hollow ring 632 has been fixed, it can only drive the third transmission gear 634 to rotate but not revolve. At this time, after the ring gear 628 is unlocked, it rotates by meshing with the third transmission gear 634. The ring gear 628 is meshed with the fourth transmission gear 645 to drive the rotating rod 643 to rotate. The rotating rod 643 rotates to drive the fan blade 644 to rotate. Combined with the heating effect of the electric heating wire 646, the water molecules in the blowing air are removed to prevent the water molecules from corroding the hanging core, and the hot air is generated along the air pipeline 647 into the air storage cavity 641 and blown to the hanging core for air drying. At the same time, the rotating motor 414 drives the rotating disk 413 and the hanging core to rotate, so as to achieve comprehensive air drying. The plugging of the positioning disk 416 and the limiting column 65 ensures the stability of the rotation of the hanging core.

[0086] After air drying is completed, the driving motor 621 rotates in the reverse direction, and drives the extension plate 612 to slide in the reverse direction and fit against the inner wall of the fixed plate 611 through the gear transmission system, thereby opening the front space to facilitate maintenance work.

[0087] Please refer again Fig.13 The clamping portion 66 includes an annular groove 661, which is provided on the second bevel gear 624. An annular slider 662 is slidably connected in the annular groove 661, and the annular slider 662 is fixedly connected to the first rotating shaft 622. Active grooves 663 are provided in an annular shape on the annular slider 662. A locking block 664 is inserted in the active groove 663, and one end of the locking block 664 is semicircular. A spring 665 is fixedly connected between the locking block 664 and the active groove 663. Locking grooves 666 are provided in an annular shape in the annular groove 661, and the locking grooves 666 are also semicircular.

[0088] In this embodiment, as the first rotating shaft 622 continues to rotate, the first transmission gear 614 stops rotating because the extension plate 612 has been merged, and then the round rod 613, the second rotating shaft 625 and the second bevel gear 624 stop rotating through the gear meshing relationship. At this time, the locking block 664 moves into the movable groove 663 under the resistance force, compresses the spring 665 and disengages from the locking groove 666, so that when the first rotating shaft 622 continues to rotate, the second bevel gear 624 stops rotating, ensuring the smooth progress of subsequent operations.

[0089] A method for inspecting and repairing a transformer on-load tap changer hanging core, applied to the above-mentioned transformer on-load tap changer hanging core inspection and repair device, comprises the following steps: Step 1, operating the hydraulic electric push rod 411 to extend, driving the support part 41 and the hanging part 42 to move downward, and hanging the hook 424 on the hanging core;

[0090] Step 2: Start the winding motor 422 to drive the hanging core to rise steadily and contact with the top seat 418 to achieve limit stability;

[0091] Step 3: Control the hydraulic electric push rod 411 to shorten, drive the hoisting part 42 and the hoisting core to rise as a whole, and complete the hoisting of the hoisting core;

[0092] Step 4: The electric slide rail 2 drives the sliding seat 3 to move so that the hanging core is positioned above the cleaning mechanism 6; the hydraulic electric push rod 411 extends to place the hanging core into the housing 61;

[0093] Step 5: Start the driving motor 621 and unfold the extension plate 612 through the gear transmission system to form a closed space to protect the hanging core;

[0094] Step 6: The first electric telescopic rod 671 drives the first clamping block 672 to fix the gear ring 628, and the water pump 635 is started to spray the cleaning liquid to circulate and clean the surface of the hanging core;

[0095] Step 7: Adjust the second electric telescopic rod 673, fix the second hollow ring 632, start the hot air drying system, and combine with the rotating motor 414 to achieve all-round air drying;

[0096] Step 8: Reversely rotate the drive motor 621, retract the extension plate 612, and open the space for subsequent maintenance operations.

[0097] The working principle of the present invention is:

[0098] Lifting core:

[0099] The hydraulic electric push rod 411 controls the lifting and lowering of the support part 41 and the hoisting part 42. The hook 424 is hung on the hanging core to be repaired. The winding motor 422 is started to drive the hanging core to rise steadily. The top seat 418 and the compression spring 419 are used to achieve the limit position to ensure the stability of the hanging core during the lifting and moving process.

[0100] Lifting core movement:

[0101] The electric slide rail 2 is used to drive the sliding seat 3 to move, and the hanging core is positioned just above the cleaning mechanism 6. The hydraulic electric push rod 411 is extended to make the hanging core drop into the cleaning mechanism 6, and ensure that the positioning plate 416 is aligned and plugged with the limiting column 65.

[0102] Automatic cleaning:

[0103] The gear transmission system is driven by the driving motor 621 to expand the extension plate 612 to form a closed space to protect the hanging core. The water pump 635 is started to spray the cleaning liquid for cyclic cleaning.

[0104] Hot air drying:

[0105] The first and second electric telescopic rods 671 and 673 are used to adjust the positions of the first and second clamping blocks 672 and 674 to fix the relevant components. The hot air drying system is started, and the rotating motor 414 is used to drive the hanging core to rotate, so as to achieve all-round drying.

[0106] Reset on:

[0107] After the inspection is completed, the drive motor 621 rotates in the opposite direction, and the extension plate 612 is retracted through the gear transmission system to open up space for subsequent inspection operations.

[0108] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. A transformer on-load tap changer hanging core maintenance device, characterized in that: comprising a base (1); An electric slide rail (2), wherein the electric slide rail (2) is fixedly connected to the upper end of the base (1) via a support rod; A sliding seat (3), wherein the sliding seat (3) is slidably connected to the electric slide rail (2); A hoisting mechanism (4), the hoisting mechanism (4) being arranged on the bottom surface of the sliding seat (3) and used for hoisting the hanging core that needs to be repaired, the hoisting mechanism (4) comprising a supporting portion (41) and a hoisting portion (42); A housing (5), wherein the housing (5) is fixedly connected to the top surface of the base (1); A cleaning mechanism (6), wherein the cleaning mechanism (6) is arranged on the housing (5); The cleaning mechanism (6) comprises a shell (61), the shell (61) being arranged on the top surface of the outer shell (5), the inner part of the outer shell (5) being provided with a driving part (62), the inner part of the shell (61) being provided with a cleaning part (63) for cleaning the hanging core that needs to be repaired, the shell (61) being provided with an air drying part (64) for air drying the hanging core after cleaning, the top surface of the outer shell (5) being fixedly connected with a limiting column (65), and the upper end of the limiting column (65) being in a pointed cone shape, the driving part (62) being provided with a clamping part (66), and the inner wall of the outer shell (5) being provided with a control part (67).

2. A transformer on-load tap changer hanging core maintenance device according to claim 1, characterized in that: The support portion (41) comprises a hydraulic electric push rod (411), wherein the hydraulic electric push rod (411) is fixedly mounted on the sliding seat (3), the lower end of the hydraulic electric push rod (411) is fixedly connected to a fixed disk (412), one side of the fixed disk (412) is rotatably connected to a rotating disk (413), a rotating motor (414) is fixedly mounted on the fixed disk (412), and the output shaft of the rotating motor (414) is fixedly connected to the rotating disk (413), one side of the rotating disk (413) is fixedly connected to a support seat (415) via a support rod, one side of the support seat (415) is rotatably connected to a positioning plate (416), the side of the support seat (415) is also fixedly connected to a hollow cylinder (417), the lower end of the hollow cylinder (417) is slidably plugged with a top seat (418), and a compression spring (419) is fixedly connected between the top seat (418) and the hollow cylinder (417).

3. A transformer on-load tap changer hanging core maintenance device according to claim 2, characterized in that: The hoisting part (42) comprises a winding roller (421), the winding roller (421) is rotatably connected to the support seat (415), a winding motor (422) is installed on the support seat (415), and the output shaft of the winding motor (422) is connected to one end of the winding roller (421), a traction rope (423) is wound around the winding roller (421), and the traction rope (423) passes through a through hole opened on the support seat (415) to the bottom of the support seat (415), and the lower end of the traction rope (423) is connected to a hook (424).

4. The transformer on-load tap changer hanging core maintenance device according to claim 1 is characterized in that: The housing (61) comprises a fixing plate (611), wherein the fixing plate (611) is fixedly connected to the top surface of the outer shell (5), and both ends of the fixing plate (611) are slidably connected to extension plates (612), and the lower end of the extension plate (612) is provided with a tooth groove, and a round rod (613) is rotatably connected to the outer shell (5), and a first transmission gear (614) is installed at one end of the round rod (613), and a first bevel gear (615) is installed at the other end of the round rod (613).

5. The transformer on-load tap changer hanging core maintenance device according to claim 1, characterized in that: The driving part (62) comprises a driving motor (621), wherein the driving motor (621) is fixedly mounted on the bottom surface of the inner cavity of the outer shell (5); the upper end of the output shaft of the driving motor (621) is fixedly connected to a first rotating shaft (622); a second transmission gear (623) and a second bevel gear (624) are mounted on the first rotating shaft (622); the bottom surface of the inner cavity of the outer shell (5) is rotatably connected to a second rotating shaft (625) via a support; a third bevel gear (627) and a fourth bevel gear (626) are respectively mounted on two ends of the second rotating shaft (625); and a gear ring (628) is rotatably connected to the top surface of the inner cavity of the outer shell (5).

6. The transformer on-load tap changer hanging core maintenance device according to claim 1, characterized in that: The cleaning portion (63) comprises a first hollow ring (631), the first hollow ring (631) being fixedly connected to the bottom surface of the inner cavity of the outer shell (5) by means of a support rod, the first hollow ring (631) being rotatably connected to a second hollow ring (632) via a sealing bearing, and the first hollow ring (631) and the second hollow ring (632) being communicated with each other, the second hollow ring (632) being rotatably connected to a hollow rod (633), and the hollow rod (633) being provided with nozzles distributed in an array, a third transmission gear (634) being fixedly mounted on the lower end of the hollow rod (633), and a water pump (635) being fixedly mounted on the back side of the base (1), the water pumping end of the water pump (635) being connected to the cavity on the base (1), and the water discharge end of the water pump (635) being connected to the first hollow ring (631).

7. The transformer on-load tap changer hanging core maintenance device according to claim 4, characterized in that: The air stem (64) comprises an air storage chamber (641), the air storage chamber (641) is provided on the fixed plate (611), and air outlet holes are provided in an array at the air storage chamber (641), a ventilation hood (642) is fixedly connected to the back of the fixed plate (611), and an air inlet slot is provided at the lower end of the ventilation hood (642), a rotating rod (643) is rotatably connected to the ventilation hood (642), a fan blade (644) is installed at one end of the rotating rod (643), and a fourth transmission gear (645) is installed at the other end of the rotating rod (643), an electric heating wire (646) is installed at the upper end of the ventilation hood (642), and an air supply pipeline (647) is connected to the upper end of the ventilation hood (642), and the upper end of the air supply pipeline (647) is connected to the air storage chamber (641).

8. The transformer on-load tap changer hanging core maintenance device according to claim 5, characterized in that: The clamping portion (66) includes an annular groove (661), which is provided on the second bevel gear (624). An annular slider (662) is slidably connected in the annular groove (661), and the annular slider (662) is fixedly connected to the first rotating shaft (622). The annular slider (662) is provided with movable grooves (663) in an annular distribution. A locking block (664) is inserted into the movable groove (663), and one end of the locking block (664) is semicircular. A spring (665) is fixedly connected between the locking block (664) and the movable groove (663). The annular groove (661) is provided with locking grooves (666) in an annular distribution, and the locking grooves (666) are also semicircular.

9. The transformer on-load tap changer hanging core maintenance device according to claim 1, characterized in that: The control unit (67) comprises a first electric telescopic rod (671) and a second electric telescopic rod (673); the first electric telescopic rod (671) and the second electric telescopic rod (673) are both fixedly mounted on the inner wall of the housing (5); the telescopic end of the first electric telescopic rod (671) is fixedly connected to a first clamping block (672); the telescopic end of the second electric telescopic rod (673) is fixedly connected to a second clamping block (674).

10. A method for inspecting and repairing a transformer on-load tap changer hanging core, applied to a transformer on-load tap changer hanging core inspection and repair device as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: operate the hydraulic electric push rod (411) to extend, drive the support part (41) and the lifting part (42) to move downward, and hang the hook (424) on the lifting core; Step 2: Start the winding motor (422) to drive the hanging core to rise steadily and contact with the top seat (418) to achieve limit stability; Step 3: Control the hydraulic electric push rod (411) to shorten, drive the hoisting part (42) and the hoisting core to rise as a whole, and complete the hoisting of the hoisting core; Step 4: The electric slide rail (2) drives the sliding seat (3) to move so that the hanging core is positioned above the cleaning mechanism (6); the hydraulic electric push rod (411) extends to place the hanging core into the housing (61); Step 5: Start the driving motor (621) and unfold the extension plate (612) through the gear transmission system to form a closed space to protect the hanging core; Step 6: The first electric telescopic rod (671) drives the first clamping block (672) to fix the gear ring (628), and the water pump (635) is started to spray the cleaning liquid to circulate and clean the surface of the hanging core; Step 7: adjust the second electric telescopic rod (673), fix the second hollow ring (632), start the hot air drying system, and combine with the rotating motor (414) to achieve all-round air drying; Step 8: Reversely rotate the drive motor (621), retract the extension plate (612), and open the space for subsequent maintenance operations.

Images