A lifting tool for facilitating lifting of oil-immersed transformer core

Abstract

The present invention discloses a lifting tool for facilitating the lifting of an oil-immersed transformer core, comprising a base column, the base column being provided with a lifting assembly, a clamping assembly, a steering assembly, and a lifting assembly sequentially distributed along the extension direction of the base column, the lifting assembly comprising a hanging plate arranged at one end of the base column and perpendicular to the length direction of the base column, the hanging plate being a triangular structure, the lifting assembly further comprising a splint slidably arranged on the base column, the splint being located on a side of the hanging plate close to the base column, so that the hanging plate can be separated from the transformer core, and the lifting assembly being used to connect an external lifting device to perform lifting operations on the lifting tool. By utilizing the structure of the transformer core itself, the hanging plate can lift and dismantle the transformer core, eliminating the need for tedious fixing and dismantling of the transformer core, thereby greatly saving construction time for construction workers.

Description

Technical Field

[0001] The invention relates to the technical field of lifting, and in particular to a lifting tool for facilitating lifting an oil-immersed transformer core. Background Art

[0002] The oil-immersed transformer uses oil as the main insulation means of the transformer and relies on oil as the cooling medium. It is a new type of high-performance transformer with a more reasonable structure and better performance. Its three-dimensional wound core has three core legs arranged in an equilateral triangle. There is no air gap in the magnetic circuit, the winding is tighter, the three magnetic circuits are of the same length and are all the shortest, and the cross-sectional area of the core legs is closer to a circle. Therefore, the performance is further improved, the loss is reduced, the noise is reduced, the three harmonics are balanced, and the third harmonic component is reduced. This product is more suitable for urban and rural, industrial and mining enterprise power grid transformation, and is more suitable for combined transformers and prefabricated substation transformers.

[0003] When inspecting or installing a transformer, the transformer core needs to be lifted, and a lifting device is an important tool for lifting the transformer core. The most common lifting device for transformer cores currently involves widening the upper web used to clamp the core, drilling lifting holes at appropriate locations from the upper edge of the upper web, and directly lifting the transformer core. Although the device is simple in structure, widening the upper web will result in a waste of material resources. Of course, there is also a method of lifting the transformer core by preserving a protrusion on the upper edge of the upper web and welding a reinforcement plate when cutting the material. However, cutting the protrusion will result in a waste of the cut portion, and welding the reinforcement plate will not only result in a waste of material, but will also increase the working time and labor intensity of the staff. At the same time, the above two methods of fixing the core of the oil-immersed transformer require the core of the oil-immersed transformer to be fixed multiple times before the core can be lifted, and disassembly is inconvenient.

[0004] Therefore, a lifting tool that can quickly disassemble and fix the iron core needs to be made to solve this problem. Summary of the Invention

[0005] The main purpose of the present invention is to provide a lifting tool for facilitating the lifting of an oil-immersed transformer core, aiming to solve the technical problem of the inconvenience in fixing and disassembling the core in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention proposes a lifting tool for facilitating lifting the iron core of an oil-immersed transformer, including a base column, wherein the base column is provided with a lifting assembly, a clamping assembly, a steering assembly and a lifting assembly distributed in sequence along the extension direction of the base column, the lifting assembly includes a hanging plate arranged at one end of the base column and perpendicular to the length direction of the base column, the hanging plate is a triangular structure, the lifting assembly also includes a splint slidably arranged on the base column, the splint is located on the side of the hanging plate close to the base column, the clamping assembly is used to drive the splint close to or away from the hanging plate to clamp the transformer core, the steering assembly is used to drive the base column to rotate axially to change the orientation of the corners of the hanging plate so that the corner positions of the hanging plate coincide with the position of the end opening, so that the hanging plate can be detached from the transformer core, and the lifting assembly is used to connect external lifting equipment to perform lifting operations on the lifting tool.

[0007] Preferably, the clamping assembly includes a first support plate rotatably arranged on the outer wall of the base column, the first support plate is located on the side of the clamping plate away from the hanging plate, the outer wall of the base column close to the first support plate is surrounded by a first limit plate, the first support plate is provided with a first limit groove for accommodating the first limit plate on the side close to the outer wall of the base column, the first support plate and the clamping plate are connected by multiple first hydraulic rods, the first hydraulic rod is used to drive the clamping plate to move toward or away from the hanging plate, and the clamping assembly also includes a control component arranged on the side of the hanging plate close to the clamping plate for controlling the operation of the first hydraulic rod.

[0008] and a lever, having one end in pinned connection to the bottom of the first slide block and another in the block pinned connection to the top of the first slide block.

[0009] Preferably, both sides of the pressing plate extend toward the side away from the clamping plate to form an arc-shaped structure.

[0010] Preferably, a side of the splint close to the hanging plate is covered with an anti-slip layer.

[0011] Preferably, the lifting assembly includes multiple pillars arranged on the side of the first support plate away from the pressure plate, and the sides of the multiple pillars away from the first support plate are connected through a second support plate, and the side of the second support plate away from the first support plate is provided with a lifting ring.

[0012] Preferably, the steering assembly is sleeved on the first gear on the outer wall of the base column, the first gear is located between the first support plate and the second support plate, a second gear is meshed with one side of the first gear, the second gear is rotatably connected to the first support plate through a support rod, the first support plate is provided with a motor, and a third gear for meshing with the second gear is provided on the output shaft of the motor.

[0013] Preferably, the side of the base column close to the hanging plate is detachably connected to the hanging plate through a quick-release component.

[0014] Preferably, a through hole is formed transversely through the side wall of the base column near one end of the hanging plate, and a receiving hole connected to the through hole is formed in the base column. The quick-release component includes a second hydraulic rod arranged in the receiving hole, and the side of the second hydraulic rod away from the receiving hole is the extension and contraction direction of the output shaft. Two first connecting rods are rotatably provided on the output shaft of the second hydraulic rod, and each of the first connecting rods is rotatably connected to the second connecting rod at one end of the output shaft away from the second hydraulic rod, and the two second connecting rods are rotatably connected to the hole wall of the through hole at one end away from the first connecting rod. A mounting hole is formed in a recess on one side of the hanging plate near the splint, and a socket for inserting the first connecting rod and the second connecting rod is formed in a transverse recess on the hole wall of the mounting hole.

[0015] In the technical solution of the present invention, this structure is used to lift the core assembly (amorphous alloy three-dimensional wound core) with a triangular cross-section in the hollow part of the end face. During lifting, the lifting assembly is connected to the external lifting equipment, and the hanging plate is moved to the top of the transformer core through the external lifting equipment. Then, the base column is rotated by the steering assembly to change the direction of the corners of the hanging plate, so that the corners of the hanging plate coincide with the end face opening space of the triangular cross-section in the transformer core. Then, the hanging plate is extended into the transformer core. After the hanging plate is located in the core space of the transformer core, the hanging plate is rotated so that the corners of the hanging plate and the corners of the transformer core cross-section are staggered with each other, so that the hanging plate can contact the core space of the transformer core when rising, thereby realizing the transformation. During the lifting of the transformer core, the clamping assembly drives the clamping plate to move toward the side close to the hanging plate, so that the clamping plate abuts against the transformer core, so that the hanging plate and the clamping plate cooperate to clamp the transformer core, and prevent the transformer core from shaking during the lifting process, causing the hanging plate to separate from the transformer core. Through the mutual cooperation between the above structures, the transformer core with a triangular cross-section (amorphous alloy three-dimensional wound core) can be lifted, and there is no need to weld a hanging plate for lifting on the outside of the transformer core, which greatly saves material waste. At the same time, the structure of the transformer core itself is utilized to enable the hanging plate to complete the lifting and disassembly of the transformer core, without the need for tedious fixing and disassembly of the transformer core, which greatly saves the construction time of the construction workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic structural diagram of the steering assembly of the present invention;

[0019] Figure 3 It is a schematic diagram of the control component structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the side structure of the pressing plate of the present invention;

[0021] Figure 5 This is a schematic diagram of the top view of the hanging plate structure of the present invention;

[0022] Figure 6 This is a schematic diagram of the quick-release component structure of the present invention;

[0023] Figure 7 It is a schematic diagram of the existing structure of the amorphous alloy three-dimensional wound core of the present invention.

[0024] Description of Figure Numbers:

[0025] 1. Hoisting assembly; 11. Hanging plate; 12. Clamping plate; 13. Anti-slip layer; 2. Clamping assembly; 21. First hydraulic rod; 22. First support plate; 23. Control component; 231. Pressing plate; 232. Ejector rod; 233. First conductive sheet; 234. Second conductive sheet; 235. First sliding hole; 236. Second sliding hole; 237. Limiting slide groove; 238. Limiting slider; 239. Sliding rod; 2310. Spring; 3. Steering assembly; 31. First gear; 32. Second gear; 33. Motor; 34. Third gear; 35. Support rod; 4. Lifting assembly; 41. Pillar; 42. Second support plate; 43. Lifting ring; 5. Base column; 6. Quick-release component; 61. Receiving hole; 62. Through hole; 63. Second hydraulic rod; 64. First connecting rod; 65. Second connecting rod; 66. Socket; 7. First limit plate; 8. Second limit plate; 9. Amorphous alloy three-dimensional wound core; 9-1. End opening; 9-2. Core space.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0030] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The hanging plate of this structure is used for lifting the iron core assembly (amorphous alloy three-dimensional wound iron core 9) with a triangular cross section in the hollow part of the end face. Figure 7 As shown, a triangular end opening 9 - 1 is formed on the end surface of the amorphous alloy three-dimensional wound core 9 , and a core space 9 - 2 is formed inside.

[0033] The invention provides a lifting tool which is convenient for lifting the iron core of an oil-immersed transformer.

[0034] Please refer to Figures 1 to 6 The lifting tool for lifting the oil-immersed transformer core includes a base column 5, and the base column 5 is provided with a lifting component 1, a clamping component 2, a steering component 3 and a lifting component 4 distributed in sequence along the extension direction of the base column 5. The lifting component 1 includes a hanging plate 11 arranged at one end of the base column 5 and perpendicular to the length direction of the base column 5. The hanging plate 11 is a triangular structure. The lifting component 1 also includes a clamping plate 12 slidably arranged on the base column 5, and the clamping plate 12 is located on the side of the hanging plate 11 close to the base column 5. The clamping component 2 is used to drive the clamping plate 12 to approach or away from the hanging plate 11 to clamp the transformer core. The steering component is used to drive the base column 5 to rotate axially to change the orientation of the corners of the hanging plate 11 so that the corner positions of the hanging plate coincide with the position of the end opening 9-1, so that the hanging plate 11 can be separated from the transformer core. The lifting component 4 is used to connect external lifting equipment to perform lifting operations on the lifting tool.

[0035] In the technical solution of the present invention, this structure is used to lift the core assembly (amorphous alloy three-dimensional wound core 9) with a triangular cross-section in the hollow part of the end face. During lifting, the lifting assembly 4 is connected to the external lifting equipment, and the hanging plate 11 is moved above the transformer core through the external lifting equipment. Then, the steering assembly 3 is used to rotate the base column 5 to change the direction of the corners of the hanging plate 11, so that the corners of the hanging plate 11 coincide with the end face opening space of the triangular cross-section in the transformer core, and then the hanging plate 11 is extended into the transformer core. After the hanging plate 11 is located in the core space 9-2 of the transformer core, the hanging plate 11 is rotated so that the corners of the hanging plate 11 and the corners of the end face opening of the transformer core are staggered, so that the hanging plate 11 can contact the core space 9-2 of the transformer core when it rises. , to realize the lifting of the transformer core. During lifting, the clamping assembly 2 drives the clamping plate 12 to move toward the side close to the hanging plate 11, so that the clamping plate 12 is in contact with the transformer core, so that the hanging plate 11 and the clamping plate 12 cooperate to clamp the transformer core, and prevent the transformer core from shaking during the lifting process, causing the hanging plate 11 to separate from the transformer core. Through the mutual cooperation between the above structures, the transformer core with a triangular cross-section (amorphous alloy three-dimensional wound core 9) can be lifted, and there is no need to weld a hanging plate for lifting on the outside of the transformer core, which greatly saves material waste. At the same time, the transformer core's own structure is utilized to enable the hanging plate 11 to complete the lifting and disassembly of the transformer core, without the need for tedious fixing and disassembly of the transformer core, which greatly saves the construction time of the construction personnel.

[0036] Please refer to the attached Figure 1The clamping assembly 2 includes a first support plate 22 rotatably arranged on the outer wall of the base column 5, and the first support plate 22 is located on the side of the clamping plate 12 away from the hanging plate 11. The outer wall of the base column 5 close to the first support plate 22 is surrounded by a first limit plate 7, and the first support plate 22 is provided with a first limit groove for accommodating the first limit plate 7 on the side close to the outer wall of the base column 5. The first support plate 22 is connected to the clamping plate 12 by multiple first hydraulic rods 21, and the first hydraulic rod 21 is used to drive the clamping plate 12 to move toward or away from the hanging plate 11. The clamping assembly 2 also includes a control component 23 arranged on the side of the hanging plate 11 close to the clamping plate 12 for controlling the operation of the first hydraulic rod 21. After the side of the hanger 11 close to the clamping plate 12 collides with the transformer core, the trigger control component 23 controls the starting instruction of the first hydraulic rod 21, so that the output shaft of the first hydraulic rod 21 extends, so that the first hydraulic rod 21 pushes the clamping plate 12 toward the side close to the hanger 11; after the side of the hanger 11 close to the clamping plate 12 moves away from the transformer core, the trigger control component 23 controls the starting instruction of the first hydraulic rod 21, so that the output shaft of the first hydraulic rod 21 retracts, so that the first hydraulic rod 21 drives the clamping plate 12 to move toward the side away from the hanger 11; through the mutual cooperation between the first limit plate 7 and the first limit groove, it can be achieved that when the base column 5 rotates, the position of the first support plate 22 on the base column 5 does not change, so that the first support plate 22 supports and lifts the base column 5.

[0037] Please refer to the attached Figure 1 and 3-5, each corner of the hanging plate 11 close to the splint 12 is respectively provided with a control component 23, the control component 23 includes a first sliding hole 235 formed in a recessed manner on the side of the hanging plate 11 close to the splint 12, a push rod 232 is provided for sliding in the first sliding hole 235, a pressing plate 231 is provided on the side of the push rod 232 away from the bottom of the first sliding hole 235, and second sliding holes 236 are respectively recessed on both sides of the first sliding hole 235, and a sliding rod 239 for sliding in each second sliding hole 236 is provided on the side of the pressing plate 231 close to the hanging plate 11, and the second sliding hole 236 is provided with a push rod 239 for sliding in each second sliding hole 236. A limiting groove 237 is provided in the transverse recess of the wall, and a limiting slider 238 is provided on the outer wall of the slide rod 239 for sliding in the limiting groove 237. A spring 2310 is sleeved on the outer wall of the slide rod 239, and the spring 2310 is located on the side of the hanger 11 close to the clamping plate 12. A first conductive sheet 233 is provided on the side of the top rod 232 close to the bottom of the first sliding hole 235, and a second conductive sheet 234 that can be electrically connected to the first conductive sheet 233 is provided at the bottom of the first sliding hole 235. The first conductive sheet 233 and the second conductive sheet 234 are respectively electrically connected to the first hydraulic rod 21. When the pressure plate 231 is not under pressure, the spring 2310 drives the push rod 232 to move toward the side away from the bottom of the first sliding hole 235, so that the first conductive piece 233 and the second conductive piece 234 are spaced apart from each other. After the pressure plate 231 is subjected to downward pressure, the pressure plate 231 drives the push rod 232 to move toward the side close to the bottom of the first sliding hole 235, so that the first conductive piece 233 and the second conductive piece 234 are in contact and electrically connected. The control component 23 activates the first hydraulic rod 21 under the following conditions: Only when the first conductive piece 233 and the second conductive piece 234 of all the control components 23 on the hanging plate 11 are in contact and electrically connected can the first hydraulic rod 21 be controlled to extend, indicating that all corners of the hanging plate 11 are in contact with the transformer core. If the first conductive piece 233 and the second conductive piece 234 of any control component 23 are not in contact, the control component 23 controls the first hydraulic rod 21 to retract, ensuring the safety of the hanging plate 11 lifting the transformer core.

[0038] Please refer to the attached Figure 4-5 The two sides of the pressing plate 231 extend toward the side away from the clamping plate 12 to form an arc-shaped structure. The pressing plate 231 is arc-shaped and covers the hanging plate 11, which can prevent the pressing plate 231 from getting stuck in the transformer core when the hanging plate 11 rotates.

[0039] Please refer to the attached Figure 1 The side of the clamping plate 12 close to the hanging plate 11 is covered with an anti-slip layer 13. The anti-slip layer 13 can be a rubber layer or a silicone layer. The provision of the anti-slip layer 13 can increase the friction between the clamping plate 12 and the transformer core after the clamping plate 12 contacts the transformer core, thereby preventing the clamping plate 12 from sliding on the transformer core.

[0040] Please refer to the attached Figure 1 The lifting assembly 4 includes a plurality of pillars 41 arranged on the side of the first support plate 22 away from the pressure plate 231. The side of the plurality of pillars 41 away from the first support plate 22 is connected by a second support plate 42. The side of the second support plate 42 away from the first support plate 22 is provided with a lifting ring 43. The lifting ring 43 is used to connect an external lifting device so that the lifting device can lift the lifting tooling. The side of the base column 5 away from the hanging plate 11 passes through the second support plate 42. The outer wall of the base column 5 and the second support plate 42 is surrounded by a second limiting plate 8. The side wall of the second support plate 42 near the base column 5 is laterally recessed to form a second limiting groove for the rotation of the second limiting plate 8. The mutual cooperation between the second support plate 42 and the second limiting groove can distribute the downward pulling force to the first limiting plate 7, making the durability of the first support plate 22 stronger.

[0041] Please refer to the attached Figure 1-2 The steering assembly 3 is sleeved on the first gear 31 on the outer wall of the base column 5. The first gear 31 is located between the first support plate 22 and the second support plate 42. A second gear 32 is meshed with one side of the first gear 31. The second gear 32 is rotatably connected to the first support plate 22 via a support rod 35. The first support plate 22 is provided with a motor 33. The output shaft of the motor 33 is provided with a third gear 34 for meshing with the second gear 32. The third gear 34 is smaller than the second gear 32, and the second gear 32 is smaller than the first gear 31 to save the output force of the motor 33. The motor 33 drives the third gear 34 to rotate. The rotation of the third gear 34 drives the rotation of the second gear 32. The rotation of the second gear 32 drives the rotation of the first gear 31. The rotation of the first gear 31 drives the base column 5 to rotate, thereby achieving steering of various angles of the hanging plate 11.

[0042] Please refer to the attached Figure 1 The side of the base column 5 near the hanging plate 11 is detachably connected to the hanging plate 11 via a quick-release component 6. The hanging plate 11 is detachably connected to the base column 5, which allows the hanging plate 11 to be changed, so that when lifting transformer cores of different sizes, different sizes of hanging plates 11 can be replaced, thereby improving the applicability of the lifting tooling.

[0043] Please refer to the attached Figure 6The side wall of the base column 5 near one end of the hanging plate 11 is horizontally penetrated by a through hole 62, and a receiving hole 61 connected to the through hole 62 is formed in the base column 5. The quick-release component 6 includes a second hydraulic rod 63 arranged in the receiving hole 61, and the side of the second hydraulic rod 63 away from the receiving hole 61 is the telescopic direction of the output shaft. Two first connecting rods 64 are rotatably provided on the output shaft of the second hydraulic rod 63, and each of the first connecting rods 64 is rotatably connected to the second connecting rod 65 at one end of the output shaft away from the second hydraulic rod 63. The two second connecting rods 65 are rotatably connected to the hole wall of the through hole 62 at one end away from the first connecting rod 64. The side of the hanging plate 11 near the splint 12 is recessed to form a mounting hole, and the hole wall of the mounting hole is horizontally recessed to form a socket 66 for inserting the first connecting rod 64 and the second connecting rod 65. The output shaft of the second hydraulic rod 63 drives the first connecting rod 64 to move toward the side away from the second hydraulic rod 63. At the same time, the first connecting rod 64 drives the second connecting rod 65 to rotate, so that the first connecting rod 64 and the second connecting rod 65 fold with each other and extend into the socket 66 to fix the hanging plate 11.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A lifting tool for lifting the iron core of an oil-immersed transformer, characterized in that: The invention comprises a base column, wherein the base column is provided with a hoisting assembly, a clamping assembly, a steering assembly and a lifting assembly which are sequentially distributed along the extension direction of the base column, the hoisting assembly comprises a hanging plate which is arranged at one end of the base column and is perpendicular to the length direction of the base column, the hanging plate is a triangular structure, the hoisting assembly further comprises a splint which is slidably arranged on the base column, the splint is located on the side of the hanging plate close to the base column, the clamping assembly is used to drive the splint to approach or away from the hanging plate to achieve clamping of the transformer core, the steering assembly is used to drive the base column to rotate axially to change the direction of the hoisting plate The orientation of each corner of the plate makes the corner positions of the hanging plate coincide with the position of the end opening, so that the hanging plate can be separated from the transformer core, and the lifting assembly is used to connect external lifting equipment to lift the lifting tooling; the clamping assembly includes a first support plate rotatably arranged on the outer wall of the base column, the first support plate is located on the side of the clamping plate away from the hanging plate, and the first limit plate is surrounded by the outer wall of the base column close to the first support plate, and the first support plate is provided on the side close to the outer wall of the base column for accommodating the first limit plate, and there is a passage between the first support plate and the clamping plate. Multiple first hydraulic rods are connected, and the first hydraulic rod is used to drive the clamping plate to move toward or away from the side of the hanging plate. The clamping assembly also includes a control component arranged on the side of the hanging plate near the clamping plate for controlling the operation of the first hydraulic rod; a control component is distributed at each corner of the side of the hanging plate near the clamping plate, and the control component includes a first sliding hole recessed in the side of the hanging plate near the clamping plate, a push rod is provided for sliding in the first sliding hole, a pressure plate is provided on the side of the push rod away from the bottom of the first sliding hole, and second sliding holes are recessed on both sides of the first sliding hole. A sliding rod for sliding in each second sliding hole is provided on the side of the pressure plate near the hanging plate, and a limiting sliding groove is provided in the inner wall of the second sliding hole. A limiting slider for sliding in the limiting sliding groove is provided on the outer wall of the sliding rod, and a spring is sleeved on the outer wall of the sliding rod, and the spring is located on the side of the hanging plate near the clamping plate. A first conductive sheet is provided on the side of the push rod near the bottom of the first sliding hole, and a second conductive sheet that can be electrically connected to the first conductive sheet is provided at the bottom of the first sliding hole. The first conductive sheet and the second conductive sheet are respectively electrically connected to the first hydraulic rod.

2. The lifting fixture for facilitating lifting of oil-immersed transformer core according to claim 1 is characterized in that: Both sides of the pressing plate extend toward a side away from the clamping plate to form an arc-shaped structure.

3. The lifting fixture for facilitating lifting of oil-immersed transformer core according to claim 1 is characterized in that: The side of the clamping plate close to the hanging plate is covered with an anti-slip layer.

4. The lifting fixture for facilitating lifting of oil-immersed transformer core according to claim 1 is characterized in that: The lifting assembly includes multiple pillars arranged on the side of the first support plate away from the pressure plate. The sides of the multiple pillars away from the first support plate are connected through a second support plate, and a lifting ring is provided on the side of the second support plate away from the first support plate.

5. The lifting tool for facilitating lifting of oil-immersed transformer core according to claim 1, characterized in that: The steering assembly is sleeved on the first gear on the outer wall of the base column, the first gear is located between the first support plate and the second support plate, a second gear is meshed with one side of the first gear, the second gear is rotatably connected to the first support plate through a support rod, the first support plate is provided with a motor, and a third gear for meshing with the second gear is provided on the output shaft of the motor.

6. The lifting tool for facilitating lifting of oil-immersed transformer core according to claim 1, characterized in that: The side of the base column close to the hanging plate is detachably connected to the hanging plate through a quick-release component.

7. The lifting fixture for facilitating lifting of an oil-immersed transformer core according to claim 6, characterized in that: A through hole is formed transversely through the side wall of the base column near one end of the hanging plate, and a receiving hole connected to the through hole is formed in the base column. The quick-release component includes a second hydraulic rod arranged in the receiving hole, and the side of the second hydraulic rod facing away from the receiving hole is the extension and contraction direction of the output shaft. Two first connecting rods are rotatably provided on the output shaft of the second hydraulic rod, and each of the first connecting rods is rotatably connected to the second connecting rod at one end of the output shaft facing away from the second hydraulic rod, and the two second connecting rods are rotatably connected to the hole wall of the through hole at one end facing away from the first connecting rod. A mounting hole is formed in a recess on one side of the hanging plate near the splint, and a socket for inserting the first connecting rod and the second connecting rod is formed in a transverse recess on the hole wall of the mounting hole.

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