A special lifting tool applicable to a transformer housing

Abstract

The present invention relates to a special lifting tool applicable to a transformer housing, which includes a lifting lug unit, a lifting beam, a left clamping unit, a left insertion unit, a right clamping unit, and a right insertion unit. The lifting lug unit is detachably fixed to the lifting beam. Both the left clamping unit and the right clamping unit are fixed to the lifting beam and are opposite to each other in the left-right direction, respectively used to clamp the left free edge and the right free edge on the transformer housing. The left insertion unit and the right insertion unit are respectively fixedly connected to the left clamping unit and the right clamping unit in a one-to-one correspondence and are opposite to each other in the left-right direction, respectively used to insert and limit the left limiting part and the right limiting part on the transformer housing. In this way, on the one hand, it prevents the "overturning" phenomenon of the transformer housing during the lifting process, and the entire lifting process saves time and effort; on the other hand, it also eliminates the occurrence of the phenomenon that the transformer housing body is "pinched" or "torn".

Description

Technical Field

[0001] The invention relates to the technical field of hanger design and manufacturing, in particular to a special hanger suitable for a transformer housing. Background Art

[0002] The transformer housing is an integral injection molded part. Figure 1 As shown in , the left and right side walls of the shell body extend outward to form a left free edge and a right free edge respectively. The shell body is generally box-shaped, and its top wall presents a certain arc. Generally speaking, when it is necessary to lift the transformer shell, it is necessary to use a flat lifting clamp. The specific steps are as follows: the left flat lifting clamp is pulled by the left wire rope, which is directly clamped on the left free edge; the right flat lifting clamp is pulled by the right wire rope, which is directly clamped on the right free edge. When the lifting equipment is in action, the left wire rope and the right wire rope are pulled at the same time, and then the transformer shell is lifted by the left flat lifting clamp and the right flat lifting clamp. Although the above hoisting scheme is simple and easy to implement, it also has the following fatal defects, which are specifically manifested in: 1) During the process of clamping and hoisting, the left free edge and the right free edge are easily clamped by the left flat hoisting clamp and the right flat hoisting clamp, respectively, and a large amount of manpower is required to repair them in the later stage; 2) During the clamping process of the left flat hoisting clamp and the right flat hoisting clamp, due to the relatively small cross-sectional area of ​​the clamping claws, the force-bearing area of ​​the left free edge and the right free edge is also relatively small. As a result, the left free edge and the right free edge are easily subjected to the pulling force and "torn" during the hoisting process, which requires a large amount of manpower for repair and may even cause the transformer housing to be completely scrapped. Therefore, it is urgent for technical personnel to solve the above problems. Summary of the invention

[0003] Therefore, in view of the above-mentioned existing problems and defects, the designers of the present invention collected relevant information, conducted multiple evaluations and considerations, and continued to experiment and modify the special hanger suitable for the transformer housing after many years of R&D experience in this industry, which eventually led to the emergence of the special hanger suitable for the transformer housing.

[0004] To solve the above technical problems, the present invention relates to a special lifting tool applicable to a transformer housing. The transformer housing includes a housing body, a left free edge, a right free edge, a left limiting portion, and a right limiting portion. The left free edge and the right free edge are respectively formed by further extending outward from the left side wall and the right side wall of the housing body. The left limiting portion and the right limiting portion are formed by further extending upward from the top wall of the housing body and are spaced apart by a set distance. The special lifting tool applicable to the transformer housing includes a lifting ear unit, a lifting beam, a left buckling unit, a left insertion unit, a right buckling unit, and a right insertion unit. The lifting ear unit is detachably fixed to the lifting beam, and the lifting beam is lifted in height by a lifting device. Both the left buckling unit and the right buckling unit are fixed to the lifting beam and are opposite to each other in the left-right direction to respectively buckle the left free edge and the right free edge. The left insertion unit and the right insertion unit are respectively fixedly connected to the left buckling unit and the right buckling unit in a one-to-one correspondence and are opposite to each other in the left-right direction to respectively insert and limit the left limiting portion and the right limiting portion.

[0005] As a further improvement of the technical solution of the present invention, the left buckling unit and the right buckling unit are arranged mirror-symmetrically with respect to each other in the left-right direction.

[0006] As a further improvement of the technical solution of the present invention, the left buckle unit includes a left bearing member, a left sliding rod, a left sliding block, a left slide rail slider assembly, a first front transmission plate, a first front deflecting member, a first front bearing column, a second front bearing column, a first front return spring, and a left supporting roller. The left bearing member includes a left fixing block, a first front side plate, a first rear side plate, a first left side plate, and a first bottom plate. The left fixing block, the first front side plate, and the first rear side plate are all fixed to the first left side plate, and together with the action of the first bottom plate, they jointly enclose a left cavity. The left supporting roller is disposed in the left cavity, and its front and rear ends are respectively hinged to the first front side plate and the first rear side plate. The left sliding block is disposed in the left cavity, and under the action of the left slide rail slider assembly, it is forced to perform a directional sliding movement along the up and down directions. The left sliding rod is inserted and fixed on the left sliding block, and its front and rear ends respectively pass through the first front side plate and the first rear side plate. Correspondingly, a first front sliding notch for the left sliding rod to freely pass through is formed on the first front side plate, and a first rear sliding notch for the left sliding rod to freely pass through is formed on the first rear side plate. The first front deflecting member is disposed directly in front of the first front side plate and is fixed to the front end of the left supporting roller. The upper end of the first front transmission plate is rotatably sleeved on the front half of the left sliding rod, and the lower end thereof is rotatably sleeved on the first front deflecting member. The first front bearing column is vertically inserted into the first front side plate, and the second front bearing column is vertically inserted into the first front transmission plate. The first front return spring is connected between the first front bearing column and the second front bearing column. The first bottom plate supports directly below the left supporting roller. During the downward movement of the left buckle unit towards the transformer housing, the left supporting roller rotates reversely to perform an avoidance action due to the abutting force of the left free edge. At the same time, the first front return spring is correspondingly stretched, and the left sliding rod together with the left sliding block slides upward under the pushing force of the first front transmission plate. When the left supporting roller completes crossing the left free edge, the first front return spring elastically returns. At the same time, the left sliding rod together with the left sliding block slides downward under the pulling force of the first front transmission plate. The left supporting roller rotates clockwise under the combined action of the first front transmission plate and the first front deflecting member until it completely abuts against the first bottom plate to achieve buckling of the left free edge.

[0007] As a further improvement of the technical solution of the present invention, the left clamping unit further includes a first rear force transmission plate, a second rear deflecting member, a first rear load-bearing column, a second rear load-bearing column, and a first rear return spring. The second rear deflecting member is arranged directly behind the first rear side plate and is also fixed to the rear end of the left supporting roller. The upper end of the first rear force transmission plate is rotatably sleeved on the rear half of the left sliding rod, and the lower end thereof is rotatably sleeved on the second rear deflecting member. The first rear load-bearing column is vertically inserted into the first rear side plate, and the second rear load-bearing column is vertically inserted into the first rear force transmission plate. The first rear return spring is connected between the first rear load-bearing column and the second rear load-bearing column. During the downward movement of the left clamping unit towards the transformer housing, the left supporting roller rotates reversely to perform an avoidance action due to the abutting force of the left free edge. At the same time, the first front return spring and the first rear return spring are correspondingly stretched, and the left sliding block, together with the left sliding block, slides upward under the combined pushing force of the first front force transmission plate and the first rear force transmission plate. When the left supporting roller finishes crossing the left free edge, the first front return spring and the first rear return spring perform elastic recovery. At the same time, the left sliding block, together with the left sliding block, slides downward under the combined pulling force of the first front force transmission plate and the first rear force transmission plate. The left supporting roller rotates clockwise under the combined action of the first front force transmission plate, the first front deflecting member, the first rear force transmission plate, and the second rear deflecting member until it completely abuts against the first bottom plate to realize the clamping of the left free edge.

[0008] As a further improvement of the technical solution of the present invention, the left insertion unit further includes a first front protective housing and a first rear protective housing. The first front protective housing is detachably fixed to the front side wall of the first front side plate to completely cover the first front force transmission plate, the first front deflecting member, the first front load-bearing column, the second front load-bearing column, and the first front return spring. The first rear protective housing is detachably fixed to the rear side wall of the first rear side plate to completely cover the first rear force transmission plate, the second rear deflecting member, the first rear load-bearing column, the second rear load-bearing column, and the first rear return spring.

[0009] As a further improvement of the technical solution of the present invention, the left insertion unit and the right insertion unit are arranged mirror-symmetrically along the left-right direction.

[0010] As a further improvement of the technical solution of the present invention, the left insertion unit includes a left load-bearing arm and a left insertion pin. The left load-bearing arm is directly detachably fixed to the right side wall of the first left side plate. The left insertion pin is vertically arranged, inserted and fixed on the left load-bearing arm, and is aligned with the left limiting portion.

[0011] As a further improvement of the technical solution of the present invention, the lifting lug unit is composed of a left lifting lug, a middle lifting lug, and a right lifting lug that are evenly distributed along the length of the lifting beam.

[0012] Compared with the lifting tool of the traditional design structure, in the technical solution disclosed in the present invention, it is a special lifting tool that is only adapted to the transformer housing provided with a left free edge, a right free edge, a left limiting part, and a right limiting part at the same time. Although the application range is relatively limited, it has a high lifting efficiency for a single batch and model of transformer housing. In the actual application process, by means of the self-weight of the special lifting tool, the left buckle unit and the right buckle unit can automatically complete the buckling operations on the left free edge and the right free edge respectively, without the assistance of external force, and by inserting the left insertion unit and the right insertion unit into the left limiting part and the right limiting part respectively, the relative position and attitude of the transformer housing are limited to prevent the occurrence of the "overturning" phenomenon during the lifting process. The whole lifting process saves time and effort; in addition, the lifting of the transformer housing is realized by means of supporting the left free edge and the right free edge, thus effectively preventing the occurrence of the phenomenon that the transformer housing body is "pinched" or "torn". Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a three-dimensional schematic diagram of the transformer housing in the present invention.

[0015] Figure 2 It is a three-dimensional schematic diagram of the first embodiment of the special lifting tool applicable to the transformer housing in the present invention.

[0016] Figure 3 is Figure 2 front view of

[0017] Figure 4 It is a three-dimensional schematic diagram of a perspective of the left buckle unit in the first embodiment of the special lifting tool applicable to the transformer housing in the present invention.

[0018] Figure 5 It is a three-dimensional schematic diagram of another perspective of the left buckle unit in the first embodiment of the special lifting tool applicable to the transformer housing in the present invention.

[0019] Figure 6It is a three-dimensional schematic diagram of the left load-bearing member in the first embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0020] Figure 7 It is a three-dimensional schematic diagram of the first front deflection member in the first embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0021] Figure 8 It is a three-dimensional schematic diagram of the second rear deflection member in the first embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0022] Figure 9 It is a three-dimensional schematic diagram of the left insertion unit in the first embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0023] Figure 10 It is a three-dimensional schematic diagram of the right insertion unit in the first embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0024] Figure 11 It is a three-dimensional schematic diagram of the second embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0025] Figure 12 It is a three-dimensional schematic diagram of one perspective of the left snap unit in the second embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0026] Figure 13 It is a three-dimensional schematic diagram of another perspective of the right snap unit in the second embodiment of the special lifting tool applicable to the transformer housing according to the present invention.

[0027] Figure 14 It is a schematic diagram of the actual application state of the special lifting tool applicable to the transformer housing according to the present invention.

[0028] 1 - Lifting ear unit; 11 - Left lifting ear; 12 - Intermediate lifting ear; 13 - Right lifting ear; 2 - Lifting beam; 3 - Left snap unit; 31 - Left load-bearing member; 32 - Left sliding rod; 33 - Left sliding block; 34 - Left sliding rail and slider assembly; 35 - First front force transmission plate; 36 - First front deflection member; 37 - First front load-bearing column; 38 - Second front load-bearing column; 39 - First front return spring; 310 - Left supporting roller; 311 - First rear force transmission plate; 312 - Second rear deflection member; 313 - First rear load-bearing column; 314 - Second rear load-bearing column; 315 - First rear return spring; 316 - First front protective housing; 317 - First rear protective housing; 4 - Left insertion unit; 41 - Left load-bearing arm; 42 - Left pin; 5 - Right snap unit; 6 - Right insertion unit. Detailed implementation mode

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "left", "right", "upper", "lower", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0030] Before the structural design of the special lifting tool is described in detail, first, a simple understanding of the transformer housing that is matched with it and to be lifted is made. As Figure 1 shown in the figure, the transformer housing includes a housing body, a left free edge, a right free edge, a left limiting portion, and a right limiting portion. The left free edge and the right free edge are respectively formed by continuously extending outward from the left side wall and the right side wall of the housing body. The left limiting portion and the right limiting portion are continuously extended upward from the top wall of the housing body and are separated by a set distance. The extension lengths of the left free edge and the right free edge are generally not less than 10 mm to reliably perform the lifting operation.

[0031] To facilitate those skilled in the art to fully understand the technical solutions disclosed in the present invention, the following further detailed description of the content of the present invention is made in conjunction with specific embodiments. Figure 2 The three-dimensional schematic diagram of the first embodiment of the special lifting tool applicable to the transformer housing in the present invention is shown. It can be seen that it is mainly composed of a lifting ear unit 1, a lifting beam 2, a left buckling unit 3, a left inserting unit 4, a right buckling unit 5, and a right inserting unit 6, etc. Among them, the lifting ear unit 1 is detachably fixed on the lifting beam 2, and the lifting beam 2 is lifted in height by means of a lifting device (such as a crane or a KPK, etc.). The left buckling unit 3 and the right buckling unit 5 are both fixed to the lifting beam 2 and are opposite in position along the left-right direction to respectively realize the buckling of the left free edge and the right free edge. The left inserting unit 4 and the right inserting unit 6 are respectively fixedly connected to the left buckling unit 3 and the right buckling unit 5 in a one-to-one correspondence and are opposite in position along the left-right direction to respectively realize the insertion and limitation of the left limiting portion and the right limiting portion on the transformer housing.

[0032] The working principle of the above-mentioned special lifting tool applicable to the transformer housing is roughly as follows: In the actual application process, the left buckling unit 3 and the right buckling unit 5 of the special lifting tool are respectively used to complete the buckling operations of the left free edge and the right free edge, and the left inserting unit 4 and the right inserting unit 5 are respectively inserted into the left limiting portion and the right limiting portion to realize the limitation of the relative position and posture of the transformer housing; in addition, the transformer housing is lifted by means of supporting and lifting the left free edge and the right free edge.

[0033] By adopting the above technical solutions, the special lifting tool applicable to the transformer housing at least has the following technical effects:

[0034] 1) It effectively prevents the occurrence of the phenomenon that the transformer housing body is "pinched" or "torn", and avoids the problem of subsequent investment of a large amount of manpower and material resources for repairing the transformer housing after hoisting;

[0035] 2) The transformer housing has good stability during the hoisting process, preventing the occurrence of the "overturning" phenomenon during the hoisting process, and the entire hoisting process saves time and effort.

[0036] Here, it should be noted that in order to ensure the balance of the force on the lifting beam 2 and prevent the occurrence of the "uneven lifting" phenomenon, the lifting lug unit 1 is composed of a left lifting lug 11, a middle lifting lug 12, and a right lifting lug 13 that are evenly distributed along the length of the lifting beam 2. During the hoisting process of the transformer housing, the left lifting lug 11, the middle lifting lug 12, and the right lifting lug 13 are simultaneously subjected to the lifting force, which not only effectively ensures the balance of the force on the lifting beam 2, but also evenly distributes the pulling force value received by each lifting lug as much as possible, preventing the occurrence of safety accidents caused by the "tearing" of the lifting lug.

[0037] It is known that the left buckle unit 3 can adopt various design structures to achieve the buckling of the left free edge. However, a preferred implementation with a simple design structure, easy to manufacture and implement, and convenient for subsequent maintenance is recommended as follows: As Figure 4 shown in the figure, the left buckle unit 3 includes a left load-bearing member 31, a left sliding rod 32, a left sliding block 33, a left sliding rail slider assembly 34, a first front transmission plate 35, a first front deflecting member 36 (as Figure 7 shown in the figure), a first front load-bearing column 37, a second front load-bearing column 38, a first front return spring 39, and a left supporting roller 310. As Figure 6As shown in the figure, the left load-bearing member 31 includes a left fixing block, a first front side plate, a first rear side plate, a first left side plate, and a first bottom plate. The left fixing block, the first front side plate, and the first rear side plate are all fixed to the first left side plate, and together with the function of the first bottom plate, they enclose a left cavity. The left supporting roller 310 is placed inside the left cavity, and its front and rear ends are respectively hinged to the first front side plate and the first rear side plate. The left sliding block 33 is placed inside the above-mentioned left cavity, and under the action of the left slide rail and slider assembly 34, it is forced to perform a directional sliding movement along the up and down directions. The left sliding rod 32 is inserted and fixed on the left sliding block 33, and its front and rear ends respectively pass through the first front side plate and the first rear side plate. Correspondingly, a first front sliding notch for the left sliding rod 32 to freely pass through is provided on the first front side plate, and a first rear sliding notch for the left sliding rod 32 to freely pass through is provided on the first rear side plate. The first front deflecting member 36 is arranged in front of the first front side plate and is fixed to the front end of the left supporting roller 310. The upper end of the first front force-transmitting plate 35 is rotatably sleeved on the front half of the left sliding rod 32, and its lower end is rotatably sleeved on the first front deflecting member 36. The first front load-bearing column 37 is vertically inserted into the first front side plate, and the second front load-bearing column 38 is vertically inserted into the first front force-transmitting plate 35. The first front return spring 39 is connected between the first front load-bearing column 37 and the second front load-bearing column 38. The first bottom plate supports the left supporting roller 310 directly below. In this way, in the actual application process, by means of the self-weight of the special lifting tool, the left buckle unit 3 can automatically complete the buckling operation of the left free edge without the assistance of external force.

[0038] The working principle of the above-mentioned left buckle unit is roughly as follows: During the downward movement of the left buckle unit 3 towards the transformer housing, the left supporting roller 310 rotates in the reverse direction to make an avoidance movement due to the top force of the left free edge. At the same time, the first front return spring 39 is stretched accordingly, and the left sliding rod 32 together with the left sliding block 33 slides upward under the pushing force of the first front force-transmitting plate 35. When the left supporting roller 310 finishes crossing the left free edge, the first front return spring 39 makes an elastic recovery. At the same time, the left sliding rod 32 together with the left sliding block 33 slides downward under the pulling force of the first front force-transmitting plate 35. The left supporting roller 310 rotates clockwise under the combined action of the first front force-transmitting plate 35 and the first front deflecting member 36 until it completely abuts against the first bottom plate to realize the buckling of the left free edge.

[0039] As Figure 5As described above, as a further optimization of the structure of the left buckle unit 3, it can also be provided with a first rear transmission plate 311, a second rear deflection member 312 (as shown in Figure 8 ), a first rear bearing column 313, a second rear bearing column 314, and a first rear return spring 315 according to specific application scenarios. The second rear deflection member 312 is arranged directly behind the first rear side plate and is also fixed to the rear end of the left support roller 310. The upper end of the first rear transmission plate 311 is rotatably sleeved on the rear half of the left sliding rod 32, and the lower end is rotatably sleeved on the second rear deflection member 312. The first rear bearing column 313 is vertically inserted into the first rear side plate, and the second rear bearing column 314 is vertically inserted into the first rear transmission plate 311. The first rear return spring 315 is connected between the first rear bearing column 313 and the second rear bearing column 314. During the downward movement of the left buckle unit 3 towards the transformer housing, the left support roller 310 rotates reversely due to the abutting force of the left free edge to perform an avoidance action. At the same time, the first front return spring 39 and the first rear return spring 315 are both stretched synchronously accordingly. The left sliding rod 32 together with the left sliding block 33 slides upward under the combined pushing force of the first front transmission plate 35 and the first rear transmission plate 311. When the left support roller 310 finishes crossing the left free edge, the first front return spring 39 and the first rear return spring 315 perform elastic recovery. At the same time, the left sliding rod 32 together with the left sliding block 33 slides downward under the combined pulling force of the first front transmission plate 35 and the first rear transmission plate 311. The left support roller 310 rotates clockwise under the combined action of the first front transmission plate 35, the first front deflection member 36, the first rear transmission plate 311, and the second rear deflection member 312 until it completely abuts against the first bottom plate to achieve automatic buckling of the left free edge.

[0040] For the same design purpose, the design structure of the right buckle unit 5 is consistent with that of the left buckle unit 3 and they are arranged mirror-symmetrically along the left-right direction. The working principle of the right buckle unit 5 is the same as that of the left buckle unit 3, and will not be elaborated here.

[0041] As shown in Figure 9 , the left insertion unit 4 preferably includes a left bearing arm 41 and a left insertion pin 42. The left bearing arm 41 is directly detachably fixed to the right side wall of the first left side plate. The left insertion pin 42 is vertically arranged, inserted and fixed on the left bearing arm 41, and is aligned with the left limit portion on the transformer housing. And the right insertion unit 6 is designed with reference to the left insertion unit 4 (as shown in Figure 10As shown in []. During the process of the relative movement of the special lifting tool with respect to the transformer housing, the left pin 41 and the right pin are first inserted into the left limiting part and the right limiting part one by one correspondingly, laying a good foundation for the directional displacement movement of the left buckling unit 3 and the right buckling unit 5, facilitating the accurate buckling of the left free edge and the right free edge subsequently, and ensuring the smooth execution of the subsequent hoisting process of the transformer housing.

[0042] Figure 11 Fig. [] shows a three-dimensional schematic diagram of the second embodiment of the special lifting tool applicable to the transformer housing in the present invention. The difference compared with the above first embodiment is that the left buckling unit 3 further includes a first front protective cover 316 and a first rear protective cover 317. The first front protective cover 316 is detachably fixed on the front side wall of the first front side plate to completely cover the first front force transmission plate 35, the first front deflecting member 36, the first front load-bearing column 37, the second front load-bearing column 38, and the first front return spring 39. The first rear protective cover 317 is detachably fixed on the rear side wall of the first rear side plate to completely cover the first rear force transmission plate 311, the second rear deflecting member 312, the first rear load-bearing column 313, the second rear load-bearing column 314, and the first rear return spring 315 (as shown in Figure 12 , 13 shown in []). In this way, on the one hand, it can effectively prevent dust or sundries from entering the left buckling unit 3, thereby avoiding the phenomena of "rusting" or "jamming" of the left buckling unit 3 and ensuring that both have high operating flexibility; on the other hand, it avoids the occurrence of the phenomenon that the staff's fingers are injured due to accidentally entering the left buckling unit 3, ensuring that the special lifting tool applicable to the transformer housing has good application safety.

[0043] For the same design purpose, the right buckling unit 5 is completely designed with reference to the left buckling unit 3 (as shown in Figure 11 shown in []).

[0044] Finally, it should be noted that Figure 14 Fig. [] shows a schematic diagram of the actual application state of the special lifting tool applicable to the transformer housing in the present invention, so as to enable those skilled in the art to more fully understand the application method of the special lifting tool applicable to the transformer housing.

[0045] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A special lifting tool applicable to a transformer housing, the transformer housing including a housing body, a left free edge, a right free edge, a left limiting portion, and a right limiting portion; the left free edge and the right free edge are respectively formed by continuously extending outward from the left side wall and the right side wall of the housing body; the left limiting portion and the right limiting portion are continuously extended upward from the top wall of the housing body and are spaced apart by a set distance. It is characterized in that the special lifting tool applicable to the transformer housing includes a lifting lug unit, a lifting beam, a left clamping unit, a left inserting unit, a right clamping unit, and a right inserting unit; the lifting lug unit is detachably fixed on the lifting beam, and the lifting beam is lifted in height by a lifting device; the left clamping unit and the right clamping unit are both fixed to the lifting beam and are opposite in position along the left-right direction to respectively realize clamping of the left free edge and the right free edge; the left inserting unit and the right inserting unit are respectively fixedly connected to the left clamping unit and the right clamping unit in a one-to-one correspondence and are opposite in position along the left-right direction to respectively realize insertion and limitation of the left limiting portion and the right limiting portion. The left clamping unit and the right clamping unit are arranged mirror-symmetrically with each other along the left-right direction. The left buckle unit includes a left load-bearing member, a left sliding rod, a left sliding block, a left sliding rail and slider assembly, a first front transmission plate, a first front deflecting member, a first front load-bearing column, a second front load-bearing column, a first front return spring, and a left supporting roller; the left load-bearing member includes a left fixing block, a first front side plate, a first rear side plate, a first left side plate, and a first bottom plate; the left fixing block, the first front side plate, and the first rear side plate are all fixed to the first left side plate, and together with the action of the first bottom plate, they enclose a left cavity; the left supporting roller is disposed in the left cavity, and its front and rear ends are respectively hinged to the first front side plate and the first rear side plate; the left sliding block is disposed in the left cavity, and under the action of the left sliding rail and slider assembly, it is forced to perform a directional sliding movement along the up and down direction; the left sliding rod is inserted and fixed on the left sliding block, and its front and rear ends respectively pass through the first front side plate and the first rear side plate. Correspondingly, a first front sliding notch for the left sliding rod to freely pass through is provided on the first front side plate, and a first rear sliding notch for the left sliding rod to freely pass through is provided on the first rear side plate; the first front deflecting member is disposed in front of the first front side plate and is fixed to the front end of the left supporting roller; the upper end of the first front transmission plate is rotatably sleeved on the front half of the left sliding rod, and the lower end of the first front transmission plate is rotatably sleeved on the first front deflecting member; the first front load-bearing column is vertically inserted into the first front side plate, and the second front load-bearing column is vertically inserted into the first front transmission plate; the first front return spring is connected between the first front load-bearing column and the second front load-bearing column; the first bottom plate supports under the left supporting roller; during the downward movement of the left buckle unit towards the transformer housing, the left supporting roller rotates reversely to perform an avoidance action due to the top force of the left free edge. At the same time, the first front return spring is correspondingly stretched, and the left sliding block together with the left sliding block slides upward under the pushing force of the first front transmission plate; when the left supporting roller completes crossing the left free edge, the first front return spring performs elastic recovery. At the same time, the left sliding block together with the left sliding block slides downward under the pulling force of the first front transmission plate; the left supporting roller rotates clockwise under the combined action of the first front transmission plate and the first front deflecting member until it completely abuts against the first bottom plate to achieve buckling of the left free edge; The left insertion unit and the right insertion unit are arranged mirror-symmetrically along the left and right directions; The left insertion unit includes a left bearing arm and a left insertion pin; the left bearing arm is directly and detachably fixed to the right side wall of the first left side plate; the left insertion pin is vertically arranged, inserted and fixed on the left bearing arm, and is aligned with the left limiting part.

2. The special lifting tool applicable to the transformer housing according to claim 1, characterized in that the lifting lug unit is composed of left lifting lugs, middle lifting lugs and right lifting lugs evenly distributed along the length of the lifting beam.

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