Protective device for maintenance of transformer of hydropower station

Abstract

The invention relates to the technical field of power equipment maintenance, and discloses a protective device for maintenance of a hydropower station transformer, the protective device comprises a mounting electric column, the outer wall of the mounting electric column is fixedly sleeved with a supporting mounting plate, and a transformer body is fixedly mounted above the supporting mounting plate through a mounting bolt. By arranging the supporting bottom plate, the supporting steel frame and the guide columns, the stability and accuracy of a protection part in the lifting process are enhanced, the stability of the whole structure is enhanced in cooperation with the supporting steel frame, the connecting plate and the reinforcing columns, meanwhile, an adjusting lead screw is driven by a motor to rotate, and a sliding plate can stably move up and down along the adjusting lead screw and the guide columns; and therefore, the whole protection frame and the internal structure of the protection frame are driven to ascend and descend, maintenance personnel can easily adjust the height of the protection device when maintaining the transformer, and the effect of improving operation convenience and flexibility is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment maintenance, in particular to a protective device used for maintenance of a transformer in a hydropower station. Background Art

[0002] As a factory that converts the potential energy and kinetic energy of water into electrical energy, the production process of a hydropower station involves diverting water from high places in rivers or other reservoirs, using the pressure or flow rate of water to drive the turbine to rotate, and then converting the gravitational potential energy and kinetic energy into mechanical energy. The turbine then drives the generator to rotate, converting the mechanical energy into electrical energy. In this conversion process, the transformer plays a vital role. It can convert the electrical energy generated by the turbine unit into voltage so that it can be incorporated into the power grid system. However, during long-term use, the transformer may fail due to various reasons (such as aging, overload, short circuit, etc.), and needs to be repaired or replaced.

[0003] During the transformer maintenance process, since the transformer is usually located at a high position, maintenance personnel need to work at height, which not only increases the difficulty and risk of maintenance, but also may pose a threat to the safety of maintenance personnel. Traditional transformer maintenance and protection methods often use simple covers or temporary protective sheds. Temporary protective sheds may consume a lot of time and resources, and there are safety risks during the construction process. Therefore, it is necessary to design a protective device for hydropower station transformer maintenance. Summary of the invention

[0004] The object of the present invention is to provide a protective device for maintenance of a transformer in a hydropower station to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a protective device for repairing a transformer in a hydropower station, comprising an installation pole, the outer wall fixing sleeve of the installation pole is provided with a support mounting plate, and a transformer body is fixedly mounted above the support mounting plate by a mounting bolt; a lifting protection component, the lifting protection component is arranged in front of and below the transformer body; the lifting protection component comprises: a lifting part, the lifting part is arranged in front of and below the transformer body; a protection part one, the protection part one is arranged below the transformer body, and the protection part one is located inside the lifting part; and a protection part two, the protection part two is arranged above and inside the protection part one.

[0006] Preferably, the lifting part includes: a supporting base plate, which is arranged in front of the electric pole; a movable rotating wheel is arranged at the bottom of the supporting base plate through a connecting shaft, and two are in a group, with a total of two groups; a supporting steel frame is fixedly installed on the top of the supporting base plate, and there are a total of two groups, which are respectively located on both sides of the supporting base plate; a control switch is fixedly installed on the outer wall of the supporting steel frame.

[0007] Preferably, the outer wall of the supporting steel frame is fixedly installed with connecting plates, and there are two groups of them, which are located below the control switch. An adjustment hole is opened on the top of the connecting plate, and a reinforcement column is arranged inside the adjusting hole. The outer wall of the supporting base plate is fixedly installed with supporting blocks, and there are four groups of them, which are located at four corners respectively. A guide column is fixedly installed on the top of the support block, and a limiting protection ring plate is fixedly installed on the top of the guide column.

[0008] The stability of the supporting steel frame is further enhanced by providing connecting plates and reinforcing columns.

[0009] Preferably, a protection rod is evenly and equidistantly fixed on the top of the limit protection ring plate, a sliding groove is opened on the inner wall side of the supporting steel frame, an installation groove is opened on the outer wall of the supporting base plate, a motor is fixedly installed on the bottom of the inner wall of the installation groove, an adjusting screw is arranged at the output end of the motor through a coupling, and the adjusting screw passes through the sliding groove and extends to the bottom of the limit protection ring plate.

[0010] By providing the guide column and the limit protection ring plate, the guide column ensures the stability of the sliding plate during the lifting process, while the limit protection ring plate prevents the sliding plate from excessively rising or falling.

[0011] By setting up protection rods evenly distributed on the top of the limit protection ring plate, additional safety protection is provided for maintenance personnel.

[0012] By providing a motor and an adjusting screw rod, the motor drives the adjusting screw rod to rotate through a coupling, thereby driving the sliding plate to move up and down along the sliding groove.

[0013] Preferably, the protective part one includes: a sliding plate, which is movably mounted on the outer wall of the adjusting screw, and there are two groups in total; a connecting base plate is fixedly installed on the inner wall of the sliding plate, a moving block is fixedly installed on the outer wall of the connecting base plate, and the moving block is movably mounted on the outer wall of the guide column, and there are four groups in total; a damper is fixedly installed on the bottom of the connecting base plate, and there are four groups in total; a buffer bottom pad is fixedly installed on the bottom of the damper, and the buffer bottom pad is arranged above the supporting base plate.

[0014] By providing a connecting bottom plate and a moving block, the connecting bottom plate is fixedly mounted on the inner wall of the sliding plate, and the moving block is movably sleeved on the outer wall of the guide column, thereby ensuring stability during the lifting process.

[0015] By providing a damper and a buffer pad, the vibration and impact force during the lifting process can be effectively absorbed to protect the transformer body from damage.

[0016] Preferably, a protective frame is fixedly installed on the top of the connecting base plate, a protective door is hingedly provided on the front of the protective frame, a mounting block is fixedly installed on the front of the protective door, a fastening block is fixedly installed on the front of the protective frame, a slot is provided on the front of the fastening block, and the slot is adapted to the mounting block.

[0017] Preferably, a socket is provided on the front side of the mounting block, and the socket movably passes through the mounting block and extends to the inside of the fastening block, and a fixing pin is provided inside the socket for fixing the mounting block and the fastening block.

[0018] A protection frame and a protection door are provided, and the protection door is connected to the protection frame in a hinged manner, so that maintenance personnel can enter and exit conveniently.

[0019] The protective door is fixed with mounting blocks, fastening blocks and fixing posts to ensure its stability and safety during maintenance.

[0020] Preferably, the second protection part includes: a protection strip, which is fixedly installed on the top of the protection door; a U-shaped protection strip, which is fixedly installed on the top of the protection frame; a tool box, which is fixedly installed on one inner wall of the protection frame; an anti-collision pad is provided below the U-shaped protection strip, and the anti-collision pad is provided on the inner wall of the protection frame, an anti-slip pad is provided below the anti-collision pad, and the anti-slip pad is fixedly installed on the bottom of the inner wall of the protection frame, a storage and replacement box is provided on one side of the tool box, and the storage and replacement box is fixedly installed on the other inner wall of the protection frame.

[0021] Anti-collision pads and anti-slip pads are provided to absorb possible collision impacts and prevent objects and maintenance personnel from sliding during the maintenance process.

[0022] A storage replacement box is provided to store parts or waste that need to be replaced during the maintenance process.

[0023] The present invention provides a protective device for maintenance of a hydropower station transformer, which has the following beneficial effects:

[0024] (1) The present invention is provided with a supporting bottom plate, a supporting steel frame, and a guide column, so that the protection part is enhanced in stability and accuracy during the lifting process. The supporting steel frame, the connecting plate, and the reinforcing column are combined to enhance the stability of the entire structure. At the same time, the motor drives the adjustment screw to rotate, and the sliding plate can move up and down smoothly along the adjustment screw and the guide column, thereby driving the lifting of the entire protection frame and its internal structure, so that maintenance personnel can easily adjust the height of the protection device when performing transformer maintenance, thereby achieving the effect of improving the convenience and flexibility of operation.

[0025] (2) The present invention effectively absorbs the vibration and impact force that may be generated by the sliding plate during the lifting process by providing a damper and a buffer pad, thereby protecting the transformer body from damage. At the same time, the protective door is hingedly arranged on the front of the protective frame, which is convenient for maintenance personnel to perform switch operations. The protective door is equipped with a card block, a fastening block, a card slot and a socket, and a fixed plug column to enhance the firmness and stability of the protective door when closed, effectively preventing external factors from interfering with and damaging the transformer body and maintenance personnel, thereby achieving the effect of improving safety during the maintenance process.

[0026] (3) The present invention effectively prevents collision and sliding that may occur during maintenance by providing a protective strip, a U-shaped protective strip, an anti-collision pad and an anti-slip pad, thereby protecting the integrity of the transformer body. At the same time, the provision of a tool box and a storage replacement box provides maintenance personnel with a convenient tool storage and parts replacement space, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a bottom view of the lifting structure of a protective device for maintenance of a hydropower station transformer according to the present invention;

[0029] Figure 3 This is a top view of the lifting structure of a protective device for maintenance of a hydropower station transformer according to the present invention;

[0030] Figure 4 This is a top view of the protective structure of a protective device for maintenance of a hydropower station transformer according to the present invention;

[0031] Figure 5 This is a side view of the protective structure of a protective device for maintenance of a hydropower station transformer according to the present invention;

[0032] Figure 6 The present invention is a bottom view of the protective structure of a protective device for repairing a transformer in a hydropower station.

[0033] In the figure: 1 installation column, 2 support installation plate, 3 transformer body, 4 lifting protection assembly, 41 lifting part, 411 support bottom plate, 412 moving wheel, 413 support steel frame, 414 control switch, 415 connection plate, 416 reinforcement column, 417 support block, 418 guide column, 419 limit protection ring plate, 4110 protection rod, 4111 slide slot, 4112 installation slot, 4113 motor, 4114 adjustment screw rod, 42 protection Protection part one, 421 sliding plate, 422 connecting bottom plate, 423 moving block, 424 damper, 425 buffer bottom pad, 426 protection frame, 427 protection door, 428 installation block, 429 fastening block, 4210 slot, 4211 socket, 4212 fixed column, 43 Protection part two, 431 protection strip, 432 U-shaped protection strip, 433 anti-collision pad, 434 anti-slip pad, 435 placement tool box, 436 storage replacement box. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Embodiment 1:

[0038] A preferred embodiment of a protective device for maintenance of a hydropower station transformer provided by the present invention is as follows: Figure 1-6As shown: a protective device for repairing a transformer in a hydropower station, comprising an installation pole 1, the outer wall fixing sleeve of the installation pole 1 is provided with a support installation plate 2, and a transformer body 3 is fixedly installed above the support installation plate 2 through a mounting bolt; a lifting protection component 4, the lifting protection component 4 is arranged in front of and below the transformer body 3; the lifting protection component 4 includes: a lifting part 41, the lifting part 41 is arranged in front of and below the transformer body 3; a protection part 1 42, the protection part 1 42 is arranged below the transformer body 3, and the protection part 1 42 is located inside the lifting part 41; a protection part 2 43, the protection part 2 43 is arranged above and inside the protection part 1 42.

[0039] The lifting part 41 includes: a supporting base plate 411, which is arranged in front of the installation pole 1; a movable rotating wheel 412 is arranged at the bottom of the supporting base plate 411 through a connecting shaft, and two are in a group, with a total of two groups; a supporting steel frame 413 is fixedly installed on the top of the supporting base plate 411, and there are a total of two groups, which are located on both sides of the supporting base plate 411, and a control switch 414 is fixedly installed on the outer wall of the supporting steel frame 413.

[0040] The outer wall of the supporting steel frame 413 is fixedly installed with connecting plates 415, and there are two groups of them, which are located below the control switch 414. An adjustment hole is opened on the top of the connecting plate 415, and a reinforcement column 416 is arranged inside the adjusting hole. The outer wall of the supporting base plate 411 is fixedly installed with supporting blocks 417, and there are four groups of them, which are located at the four corners respectively. A guide column 418 is fixedly installed on the top of the supporting block 417, and a limit protection ring plate 419 is fixedly installed on the top of the guide column 418.

[0041] The connection plate 415 and the reinforcement column 416 are provided to further enhance the stability of the supporting steel frame 413 .

[0042] A protection rod 4110 is evenly and equidistantly fixed on the top of the limit protection ring plate 419, a slide groove 4111 is opened on the inner wall side of the supporting steel frame 413, and an installation groove 4112 is opened on the outer wall of the supporting base plate 411. A motor 4113 is fixedly installed on the bottom of the inner wall of the installation groove 4112, and an adjusting screw 4114 is arranged at the output end of the motor 4113 through a coupling, and the adjusting screw 4114 passes through the slide groove 4111 and extends to the bottom of the limit protection ring plate 419.

[0043] By providing the guide column 418 and the limit protection ring plate 419 , the guide column 418 ensures the stability of the sliding plate 421 during the lifting process, while the limit protection ring plate 419 prevents the sliding plate 421 from excessively rising or falling.

[0044] By providing protection rods 4110 evenly distributed on the top of the limit protection ring plate 419, additional safety protection is provided for maintenance personnel.

[0045] By providing a motor 4113 and an adjusting screw rod 4114 , the motor 4113 drives the adjusting screw rod 4114 to rotate through a coupling, thereby driving the sliding plate 421 to move up and down along the sliding groove 4111 .

[0046] Furthermore, this embodiment is provided with a supporting base plate 411, a supporting steel frame 413, and a guide column 418, so that the protection part is enhanced in stability and accuracy during the lifting process, and the stability of the entire structure is enhanced by cooperating with the supporting steel frame 413, the connecting plate 415 and the reinforcing column 416. At the same time, the adjusting screw rod 4114 is driven to rotate by the motor 4113, and the sliding plate 421 can move up and down smoothly along the adjusting screw rod 4114 and the guide column 418, thereby driving the lifting of the entire protection frame 426 and its internal structure, so that maintenance personnel can easily adjust the height of the protective device when performing transformer maintenance.

[0047] Embodiment 2:

[0048] See also Figure 1-Figure 6 , and on the basis of Example 1, it is further obtained that: the protective part 1 42 includes: a sliding plate 421, the sliding plate 421 is movably mounted on the outer wall of the adjusting screw rod 4114, and there are two groups in total; a connecting base plate 422 is fixedly installed on the inner wall of the sliding plate 421, a moving block 423 is fixedly installed on the outer wall of the connecting base plate 422, and the moving block 423 is movably mounted on the outer wall of the guide column 418, and there are four groups in total; a damper 424 is fixedly installed on the bottom of the connecting base plate 422, and there are four groups in total; a buffer bottom pad 425 is fixedly installed on the bottom of the damper 424, and the buffer bottom pad 425 is arranged above the supporting base plate 411.

[0049] By providing a connecting bottom plate 422 and a moving block 423 , the connecting bottom plate 422 is fixedly mounted on the inner wall of the sliding plate 421 , and the moving block 423 is movably sleeved on the outer wall of the guide column 418 , thereby ensuring stability during the lifting process.

[0050] By providing the damper 424 and the buffer base pad 425 , the vibration and impact force during the lifting process are effectively absorbed, and the transformer body 3 is protected from damage.

[0051] A protective frame 426 is fixedly installed on the top of the connecting base plate 422, a protective door 427 is hingedly provided on the front of the protective frame 426, a mounting block 428 is fixedly installed on the front of the protective door 427, a fastening block 429 is fixedly installed on the front of the protective frame 426, a slot 4210 is provided on the front of the fastening block 429, and the slot 4210 is compatible with the mounting block 428.

[0052] A socket 4211 is provided on the front side of the mounting block 428 , and the socket 4211 movably passes through the mounting block 428 and extends to the interior of the fastening block 429 . A fixing pin 4212 is provided inside the socket 4211 for fixing the mounting block 428 and the fastening block 429 .

[0053] By providing a protection frame 426 and a protection door 427, the protection door 427 is connected to the protection frame 426 in a hinged manner, so that maintenance personnel can enter and exit easily.

[0054] The protective door 427 is fixed by providing a mounting block 428, a fastening block 429 and a fixing pin 4212 to ensure its stability and safety during maintenance.

[0055] Furthermore, this embodiment effectively absorbs the vibration and impact force that may be generated by the sliding plate 421 during the lifting process by providing a damper 424 and a buffer base pad 425, thereby protecting the transformer body 3 from damage. At the same time, the protective door 427 is hingedly arranged on the front of the protective frame 426, which is convenient for maintenance personnel to perform switch operations. The protective door is enhanced in firmness and stability when closed by installing a card block 428, a fastening block 429, a card slot 4210 and a socket 4211, and a fixed column 4212, thereby effectively preventing external factors from interfering with and damaging the transformer body 3 and maintenance personnel.

[0056] Embodiment three:

[0057] See also Figure 1-Figure 6 , and on the basis of Example 1, it is further obtained that: the protection part 2 43 includes: a protection strip 431, the protection strip 431 is fixedly installed on the top of the protection door 427; a U-shaped protection strip 432, the U-shaped protection strip 432 is fixedly installed on the top of the protection frame 426; a tool box 435 is placed, and the tool box 435 is fixedly installed on one side of the inner wall of the protection frame 426; an anti-collision pad 433 is arranged below the U-shaped protection strip 432, and the anti-collision pad 433 is arranged on the inner wall of the protection frame 426, an anti-slip pad 434 is arranged below the anti-collision pad 433, and the anti-slip pad 434 is fixedly installed on the bottom of the inner wall of the protection frame 426, and a storage replacement box 436 is arranged on one side of the tool box 435, and the storage replacement box 436 is fixedly installed on the other side of the inner wall of the protection frame 426.

[0058] The anti-collision pad 433 and the anti-slip pad 434 are provided to absorb possible collision impact and prevent objects and maintenance personnel from sliding during the maintenance process.

[0059] A storage replacement box 436 is provided to store parts or wastes that need to be replaced during the maintenance process.

[0060] Furthermore, this embodiment effectively prevents possible collisions and sliding during maintenance by providing a protection strip 431, a U-shaped protection strip 432, an anti-collision pad 433 and an anti-slip pad 434, thereby protecting the integrity of the transformer body 3. At the same time, the tool box 435 and the storage and replacement box 436 are provided to provide maintenance personnel with a convenient tool storage and parts replacement space.

[0061] When in use, first, the transformer body 3 is firmly fixed on the supporting mounting plate 2 by means of the mounting bolts, and the supporting mounting plate 2 is sleeved on the outer wall of the mounting pole 1. When the transformer body 3 needs to be repaired, the maintenance personnel enter the interior of the protective frame 426 by opening the protective door 427, and then press the mounting block 428 into the interior of the card slot 4210, and insert the fixing plug 4212 into the socket 4211 for fixing. Further, the assistant turns on the power by means of the control switch 414, the motor 4113 is started, and the output end of the motor 4113 drives the adjusting screw 4114 to rotate. Since the sliding plate 421 is movably sleeved on the outer wall of the adjusting screw 4114, the adjusting The rotation of the threaded rod will drive the sliding plate 421 to move up and down under the guidance of the guide column 418. At the same time, when the sliding plate 421 moves up and down, it will drive the entire protective frame 426 and its internal structure to move together, thereby realizing the lifting and lowering of the protective structure. The position is adjusted according to the installation height of the transformer body 3. After rising to the specified position, the maintenance personnel open the tool box 435 and the storage and replacement box 436 to repair the transformer body 3. Furthermore, if the transformer body 3 needs to be replaced, the protective strip 431, the U-shaped protective strip 432, the anti-collision pad 433 and the anti-slip pad 434 are provided to provide all-round protection, which is convenient for the maintenance personnel to repair the transformer body 3.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A protective device for the maintenance of a transformer in a hydropower station, comprising a mounting pole (1), characterized in that: The outer wall fixing sleeve of the installation pole (1) is provided with a support installation plate (2), and a transformer body (3) is fixedly installed above the support installation plate (2) via a mounting bolt; A lifting protection component (4), wherein the lifting protection component (4) is arranged in front of and below the transformer body (3); The lifting protection component (4) comprises: A lifting portion (41), wherein the lifting portion (41) is arranged in front of and below the transformer body (3); A protection part (42), wherein the protection part (42) is arranged below the transformer body (3), and the protection part (42) is located inside the lifting part (41); The second protection part (43) is arranged above and inside the first protection part (42).

2. A protective device for maintenance of a hydropower station transformer according to claim 1, characterized in that: The lifting part (41) includes: A supporting base plate (411), wherein the supporting base plate (411) is arranged in front of the installation pole (1); The bottom of the support base plate (411) is provided with a movable rotating wheel (412) through a connecting shaft, and two of them form a group, with a total of two groups; the top of the support base plate (411) is fixedly installed with a supporting steel frame (413), and there are a total of two groups, which are respectively located on both sides of the support base plate (411); and the outer wall of the supporting steel frame (413) is fixedly installed with a control switch (414).

3. A protective device for maintenance of a hydropower station transformer according to claim 2, characterized in that: The outer wall of the supporting steel frame (413) is fixedly mounted with a connecting plate (415), and there are two groups of them, which are located below the control switch (414); an adjustment hole is opened on the top of the connecting plate (415), and a reinforcing column (416) is arranged inside the adjustment hole; the outer wall of the supporting bottom plate (411) is fixedly mounted with a supporting block (417), and there are four groups of them, which are located at four corners respectively; a guide column (418) is fixedly mounted on the top of the supporting block (417), and a limit protection ring plate (419) is fixedly mounted on the top of the guide column (418).

4. A protective device for maintenance of a hydropower station transformer according to claim 3, characterized in that: A protection rod (4110) is evenly and equidistantly fixedly installed on the top of the limit protection ring plate (419), a slide groove (4111) is provided on the inner wall side of the support steel frame (413), and an installation groove (4112) is provided on the outer wall of the support bottom plate (411), and a motor (4113) is fixedly installed on the bottom of the inner wall of the installation groove (4112), and an adjusting screw (4114) is provided at the output end of the motor (4113) through a coupling, and the adjusting screw (4114) passes through the slide groove (4111) and extends to the bottom of the limit protection ring plate (419).

5. A protective device for maintenance of a hydropower station transformer according to claim 4, characterized in that: The protective part 1 (42) includes: Sliding plates (421), the sliding plates (421) are movably sleeved on the outer wall of the adjusting screw rod (4114), and there are two sets of sliding plates (421); A connecting base plate (422) is fixedly mounted on the inner wall of the sliding plate (421), a moving block (423) is fixedly mounted on the outer wall of the connecting base plate (422), and the moving block (423) is movably sleeved on the outer wall of the guide column (418), and there are four groups of the moving blocks in total; a damper (424) is fixedly mounted on the bottom of the connecting base plate (422), and there are four groups of the moving blocks in total; a buffering bottom pad (425) is fixedly mounted on the bottom of the damper (424), and the buffering bottom pad (425) is arranged above the supporting base plate (411).

6. A protective device for maintenance of a hydropower station transformer according to claim 5, characterized in that: A protective frame (426) is fixedly installed on the top of the connecting base plate (422); a protective door (427) is hingedly provided on the front of the protective frame (426); a mounting block (428) is fixedly installed on the front of the protective door (427); a fastening block (429) is fixedly installed on the front of the protective frame (426); a slot (4210) is provided on the front of the fastening block (429), and the slot (4210) is compatible with the mounting block (428).

7. A protective device for maintenance of a hydropower station transformer according to claim 6, characterized in that: The front side of the installation block (428) is provided with a socket (4211), and the socket (4211) movably passes through the installation block (428) and extends to the inside of the fastening block (429), and a fixing pin (4212) is provided inside the socket (4211) for fixing the installation block (428) and the fastening block (429).

8. The protective device for maintenance of a hydropower station transformer according to claim 1, characterized in that: The second protection part (43) includes: A protection strip (431), wherein the protection strip (431) is fixedly mounted on the top of the protection door (427); A U-shaped protection strip (432), wherein the U-shaped protection strip (432) is fixedly mounted on the top of the protection frame (426); A placement tool box (435), wherein the placement tool box (435) is fixedly mounted on an inner wall of one side of the protection frame (426); An anti-collision pad (433) is provided below the U-shaped protection strip (432), and the anti-collision pad (433) is provided on the inner wall of the protection frame (426); an anti-slip pad (434) is provided below the anti-collision pad (433), and the anti-slip pad (434) is fixedly mounted on the bottom of the inner wall of the protection frame (426); a storage and replacement box (436) is provided on one side of the tool box (435), and the storage and replacement box (436) is fixedly mounted on the inner wall of the other side of the protection frame (426).

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