Falling limiting device for installation of power transformer

Abstract

The invention discloses a falling limiting device for power transformer installation, and belongs to the field of power transformer installation. The power transformer base is assembled at the top of the base; the protection plate is assembled on the top of the base; a first connecting rod is fixedly connected to the side face of the protection plate, a first flow guide plate is hinged to the back face of the first connecting rod, and a second flow guide plate is hinged to the bottom of the first flow guide plate. An electric telescopic rod is started and pushes a first flow guide plate and a second flow guide plate to be folded so as to shunt wind power, so that the shaking degree of the power transformer is reduced, movement of the second flow guide plate drives a steel wire rope and a pushing rack to descend, finally, a balance weight ball is driven to descend, and the stability of a base is enhanced; and shaking caused by crosswind during high-altitude hoisting of the power transformer is reduced, and the stability of the hoisting process is enhanced, especially when wind power changes.

Description

Technical Field

[0001] This application relates to the field of power transformer installation, and more particularly, to a falling limit device for power transformer installation. Background Art

[0002] When installing a power transformer, the support channel steel and the hoop are first fixed on the utility pole, and then the transformer is lifted by a crane and then lowered onto the support channel steel. Since the transformer will sway during the lowering process, it is difficult to control the falling position well, and often the situation of the transformer being skewed after falling occurs.

[0003] The patent document with the publication number CN214588337U discloses a falling limit device for power transformer installation. When the power transformer is lowered, it will sway, making it difficult to control the falling position well, and often the situation of the transformer being skewed after falling occurs. Two fixed channel steels and a bottom plate, the two fixed channel steels are arranged in parallel, the bottom plate is welded to the two fixed channel steels, a vertical plate is welded at each end of each fixed channel steel, and a lightning plate is rotatably connected to each vertical plate. A stud is threadedly connected to the lightning plate, and the stud passes through the arc through hole on the vertical plate and is threadedly connected to a nut.

[0004] Although the above application document does not require the crane driver to continuously adjust the position of the transformer, and the amplitude of the transformer's sway is continuously limited by the hypotenuses of the four lightning plates during the falling process to ensure the accuracy of the falling position after it falls, when encountering a crosswind during high-altitude hoisting, it will cause the power transformer to sway left and right, making it inconvenient to install. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a falling limit device for power transformer installation, which solves the problems raised in the above background art.

[0006] To achieve the above object, the present application provides a falling limit device for power transformer installation, including: A base; A power transformer base, which is assembled on the top of the base; A protection plate, which is assembled on the top of the base; A first connecting rod is fixedly connected to the side of the protection plate, a first guiding plate is hinged to the back of the first connecting rod, a second guiding plate is hinged to the bottom of the first guiding plate, a second connecting rod is fixedly connected to the side of the base, an electric telescopic rod is assembled on the top of the base, a rotating rod is rotatably connected to the front of the inner wall of the base through a bearing, a connecting rope is fixedly connected to the outer wall of the rotating rod, a counterweight ball is fixedly connected to the bottom of the connecting rope, and a transmission component for driving the second guiding plate and the rotating rod is assembled on the top of the base.

[0007] Preferably, the transmission assembly includes a circular gear fixedly sleeved on the outer wall of the rotating rod. A sliding plate is fixedly connected to the front inner wall of the base. A rack is slidably connected to the outer wall of the sliding plate. A connecting plate is fixedly connected to the side inner wall of the base. A pulley is rotatably connected to the front of the connecting plate through a bearing. A steel wire rope is fixedly connected to the bottom of the rack. One end of the steel wire rope away from the rack is fixedly connected to the side of the second deflector.

[0008] Preferably, the second connecting rod is slidably connected to the front of the second deflector, and the steel wire rope is wound around the outer walls of the two pulleys.

[0009] Preferably, the circular gear meshes with the rack.

[0010] Preferably, an expansion device for limiting and damping the power transformer is assembled on the top of the base.

[0011] Preferably, the expansion device includes a side rod fixedly sleeved on the outer wall of the output end of the electric telescopic rod. A conical block is fixedly connected to the side of the side rod. The base of the power transformer is placed on the top of the conical block. A slider is fixedly connected to the top of the base. A first airbag is fixedly connected to the top of the base. A second airbag is fixedly connected to the side of the protection plate. The base of the power transformer is slidably connected to the outer wall of the slider.

[0012] Preferably, a first hydraulic chamber is fixedly connected to the top of the base. The first hydraulic chamber is fixedly connected to and communicated with the first airbag. A first hydraulic rod is slidably connected to one end inside the first hydraulic chamber. The first hydraulic rod is fixedly connected to the front of the side rod. A connecting pipe is fixedly connected to the top of the first hydraulic chamber. One end of the connecting pipe away from the first hydraulic chamber is fixedly connected to the bottom of the second airbag. The first airbag and the second airbag are respectively assembled inside the limiting box.

[0013] Preferably, a rotating device for further improving the wind resistance effect is assembled on the top of the base.

[0014] Preferably, the rotating device includes a pressing block movably penetrating through the protection plate and extending upward. The bottom of the pressing block is in contact with the second airbag. A first wind plate is hinged to the top of the protection plate. A receiving groove is formed in the inner wall of the first wind plate. A counterweight rod is slidably connected to the inner wall of the receiving groove. A second hydraulic chamber is fixedly connected to the bottom of the inner wall of the receiving groove. A second hydraulic rod is slidably connected to one end of the piston inside the second hydraulic chamber. A third hydraulic rod is slidably connected to one end of the piston inside the second hydraulic chamber. The top of the third hydraulic rod is fixedly connected to a second wind plate.

[0015] Preferably, a spring is movably sleeved on the outer wall of the second hydraulic rod, and the first wind plate is hinged to the top of the pressing block.

[0016] The advantages of the present application are as follows: 1. The present application starts and drives the first deflector and the second deflector to fold through the electric telescopic rod, aiming to divert the wind force, thereby reducing the shaking degree of the power transformer. The movement of the second deflector drives the steel wire rope, pushes the rack to descend, and finally drives the counterweight ball to descend, enhancing the stability of the base, reducing the shaking of the power transformer caused by crosswind during high-altitude hoisting, and enhancing the stability of the hoisting process, especially when the wind force changes.

[0017] 2. The present application drives the side rod and the conical block to move to the right through the movement of the electric telescopic rod. At the same time, through the inflation of the first airbag and the second airbag, the bottom and both sides of the transformer are supported, enhancing the stability of the transformer during the hoisting process, avoiding the problem of the sinking of the transformer base, and improving the hoisting accuracy and safety.

[0018] 3. The present application drives the extrusion block to rise through the inflation of the second airbag, and then rotates the first wind plate to adjust the air flow path, guiding the oncoming wind to the farther outer side. By adjusting the air flow path, the direct impact of the wind force on the transformer is reduced, and further the influence of the wind force on the stability of the base during the hoisting process is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of the present application are used to provide a further understanding of the present application, making other features, objects, and advantages of the present application more obvious. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a front schematic diagram of a part of the present invention Figure 1 ; Figure 3 is a right-side schematic diagram of a part of the present invention Figure 1 ; Figure 4 is a right-side schematic diagram of a part of the present invention Figure 2 ; Figure 5 is the present invention Figure 4 is a schematic diagram of the enlarged structure at A in the present invention; Figure 6 is a front schematic diagram of a part of the present invention Figure 2 ; Figure 7 is a front structure schematic diagram of the wind plate of the present invention; Figure 8 is the present invention Figure 6 is a schematic diagram of the enlarged structure at B in the present invention.

[0020] In the above figures, 1. Base; 21. First connecting rod; 22. First deflector; 23. Second deflector; 24. Second connecting rod; 25. Connecting plate; 26. Rotating rod; 27. Slide plate; 28. Rack; 29. Circular gear; 210. Connecting rope; 211. Counterweight ball; 212. Pulley; 213. Steel wire rope; 214. Electric telescopic rod; 3. Expansion device; 31. Side rod; 32. Tapered block; 33. Slide block; 34. First airbag; 35. Second airbag; 36. First hydraulic chamber; 37. First hydraulic rod; 38. Connecting pipe; 4. Rotating device; 41. Extrusion block; 42. First wind plate; 43. Second hydraulic chamber; 44. Second hydraulic rod; 45. Counterweight rod; 46. Third hydraulic rod; 47. Second wind plate; 48. Accommodating groove; 5. Power transformer base; 6. Protection plate. Detailed implementation manners

[0021] In order to enable those skilled in the art of the present technology to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0022] It should be noted that the terms "first", "second", etc. in the description and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of this application here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] In this application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe this application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0024] Moreover, in addition to being used to indicate orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0025] In addition, the terms "install", "set", "provided with", "connect", "connected", "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. The following will refer to the drawings and combine with embodiments to detail this application.

[0027] Embodiment 1, see Figures 1-3 , this embodiment provides a falling limit device for installing a power transformer, including: a base 1; a power transformer base 5, and the power transformer base 5 is assembled on the top of the base 1; a protection plate 6, and the protection plate 6 is assembled on the top of the base 1; A first connecting rod 21 is fixedly connected to the side of the protection plate 6. The back of the first connecting rod 21 is hinged with a first flow guide plate 22. The bottom of the first flow guide plate 22 is hinged with a second flow guide plate 23. A second connecting rod 24 is fixedly connected to the side of the base 1. An electric telescopic rod 214 is assembled on the top of the base 1. The front surface of the inner wall of the base 1 is rotatably connected with a rotating rod 26 through a bearing. A connecting rope 210 is fixedly connected to the outer wall of the rotating rod 26. The bottom of the connecting rope 210 is fixedly connected with a counterweight ball 211. A transmission component for driving the second flow guide plate 23 and the rotating rod 26 is assembled on the top of the base 1. Using the base 1 as the main support structure, the power transformer base 5 is assembled on the top of the base 1, and the protection plate 6 is assembled on the top of the base 1 for protection. The settings of the first connecting rod 21, the first flow guide plate 22, and the second flow guide plate 23 realize the flow guiding function and prevent liquids such as rainwater from directly impacting the power transformer. The electric telescopic rod 214 is used to adjust the height or position of the device. The rotating rod 26, the connecting rope 210, and the counterweight ball 211 are used to achieve dynamic balance and adjustment. The transmission component is used to transmit power to the second flow guide plate 23 and the rotating rod 26 to realize the automatic adjustment function, thereby achieving the purpose of limiting and protecting. The transmission component includes a circular gear 29 fixedly sleeved on the outer wall of the rotating rod 26. A sliding plate 27 is fixedly connected to the front surface of the inner wall of the base 1. A rack 28 is slidably connected to the outer wall of the sliding plate 27. A connecting plate 25 is fixedly connected to the side surface of the inner wall of the base 1. A pulley 212 is rotatably connected to the front surface of the connecting plate 25 through a bearing. A steel wire rope 213 is fixedly connected to the bottom of the rack 28. One end of the steel wire rope 213 away from the rack 28 is fixedly connected to the side of the second flow guide plate 23. By fixedly sleeving the circular gear 29 on the outer wall of the rotating rod 26 and combining the sliding connection between the sliding plate 27 and the rack 28, the transmission and conversion of power are realized. The mutual meshing of the rack 28 and the circular gear 29 enables the rotation of the rotating rod 26 to drive the rack 28 to slide within the sliding plate 27. By connecting the rack 28 and the second flow guide plate 23 with the steel wire rope 213, the dynamic control of the second flow guide plate 23 is realized, enhancing the flexibility and adaptability of the device. The second connecting rod 24 is slidably connected to the front surface of the second flow guide plate 23. The steel wire rope 213 is wound around the outer walls of the two pulleys 212. It is clear that the second connecting rod 24 is slidably connected to the front surface of the second flow guide plate 23, restricting the movement direction of the second flow guide plate 23 so that it can only slide along the second connecting rod 24, thereby ensuring the stability and accuracy of the second flow guide plate 23 during movement. The steel wire rope 213 is wound around the outer walls of the two pulleys 212. Through the guiding action of the pulleys 212, the wear of the steel wire rope 213 is reduced, the transmission efficiency is improved, and the stable operation of the entire device is ensured. The circular gear 29 meshes with the rack 28. It is clear that the circular gear 29 meshes with the rack 28. This design ensures the stability and accuracy of power transmission. The rotation of the circular gear 29 can convert the linear motion of the rack 28 into the motion of the second flow guide plate 23, thereby realizing the precise control of the angle and position of the flow guide plate and enhancing the flexibility and adaptability of the device.

[0028] When the above-mentioned device is in specific use, at the lifting port of the base 1, the electric telescopic rod 214 is started. The electric telescopic rod 214 pushes the first deflector 22 to rotate counterclockwise with the hinge point as the center. The first deflector 22 drives the second deflector 23 to move to the right. The second deflector 23 is limited by the second connecting rod 24. The first deflector 22 and the second deflector 23 are folded, which can divide the wind flow and reduce the shaking degree. When the second deflector 23 moves to the right, it drives the steel wire rope 213 to move to the right. The steel wire rope 213 slides through two pulleys 212. The steel wire rope 213 drives the rack 28 to descend. The rack 28 is limited by the slide plate 27. The descending of the rack 28 drives the circular gear 29 to drive the rotating rod 26 to rotate. The rotation of the rotating rod 26 drives the connecting rope 210 on the outer wall to descend. The connecting rope 210 drives the counterweight ball 211, and further improves the stability of the base 1 during hoisting through the counterweight ball 211.

[0029] Example 2, see Figures 3-5, on the basis of Embodiment 1, an expansion device 3 for limiting and damping the power transformer is assembled on the top of the base 1. The assembled expansion device 3 is used for limiting and damping the power transformer. Through the expansion effect of the expansion device 3, the base 5 of the power transformer can be firmly fixed on the base 1, and at the same time, a certain damping function is provided to reduce the impact of external shocks on the power transformer and improve the stability and safety of the power transformer. The expansion device 3 includes a side rod 31, and the side rod 31 is fixedly sleeved on the outer wall of the output end of the electric telescopic rod 214. A conical block 32 is fixedly connected to the side of the side rod 31. The base 5 of the power transformer is placed on the top of the conical block 32. A slider 33 is fixedly connected to the top of the base 1, and a first airbag 34 is fixedly connected to the top of the base 1. A second airbag 35 is fixedly connected to the side of the protection plate 6. The base 5 of the power transformer is slidably connected to the outer wall of the slider 33. Through the combination of components such as the side rod 31, the conical block 32, the slider 33, the first airbag 34, and the second airbag 35, the specific functions of the expansion device 3 are realized. The side rod 31 and the conical block 32 are used to support the base 5 of the power transformer. The slider 33 provides stable sliding support. The first airbag 34 and the second airbag 35 are used to provide damping and expansion functions to ensure the stability of the base 5 of the power transformer during operation. A first hydraulic chamber 36 is fixedly connected to the top of the base 1. The first hydraulic chamber 36 is fixedly connected to the first airbag 34 and is communicated. One end of the piston in the first hydraulic chamber 36 is slidably connected to a first hydraulic rod 37. The first hydraulic rod 37 is fixedly connected to the front of the side rod 31. A connecting pipe 38 is fixedly connected to the top of the first hydraulic chamber 36. The end of the connecting pipe 38 away from the first hydraulic chamber 36 is fixedly connected to the bottom of the second airbag 35. The first airbag 34 and the second airbag 35 are respectively assembled inside the limit box. Through the arrangement of components such as the first hydraulic chamber 36, the first hydraulic rod 37, and the connecting pipe 38, the hydraulic system of the expansion device 3 is further improved. The first hydraulic chamber 36 is communicated with the first airbag 34. Through the telescopic movement of the hydraulic rod, the expansion degree of the airbag can be adjusted, so as to realize the precise limiting and damping of the base 5 of the power transformer. This hydraulically driven expansion device 3 has the advantages of fast response speed, high adjustment accuracy, and good stability.

[0030] When the above equipment is specifically used, when the electric telescopic rod 214 moves to the right, it drives the side rod 31 to move to the right. The side rod 31 drives the conical block 32 to move to the right. Without the support of the conical block 32, the base 5 of the power transformer will drop. The slider 33 limits the base 5 of the power transformer. The side rod 31 drives the first hydraulic rod 37 to move to the right. During the process of the first hydraulic rod 37 moving to the right, the pressure inside the first hydraulic chamber 36 increases, and the hydraulic oil flows into the first airbag 34 and the connecting pipe 38. The first airbag 34 expands to contact the bottom of the transformer. The hydraulic oil flowing in from the connecting pipe 38 flows into the second airbag 35, and the second airbag 35 expands to limit both sides of the transformer, further improving the stability of the transformer during hoisting.

[0031] Embodiment 3, refer to Figures 6-8 , on the basis of Embodiment 1, a rotating device 4 for further improving the wind resistance effect is assembled on the top of the base 1. The rotating device 4 is assembled to further improve the wind resistance effect. Through the design of the rotating device 4, the angle of the device can be automatically adjusted in a strong wind environment, reducing the direct impact of the wind force on the device, thereby improving the wind resistance and stability of the device. The rotating device 4 includes a pressing block 41. The pressing block 41 movably penetrates through the protection plate 6 and extends towards the top. The bottom of the pressing block 41 is attached to the second airbag 35. A first wind plate 42 is hinged to the top of the protection plate 6. A receiving groove 48 is formed in the inner wall of the first wind plate 42. A counterweight rod 45 is slidably connected to the inner wall of the receiving groove 48. A second hydraulic chamber 43 is fixedly connected to the bottom of the inner wall of the receiving groove 48. A second hydraulic rod 44 is slidably connected to one end of the piston inside the second hydraulic chamber 43. A third hydraulic rod 46 is slidably connected to one end of the piston inside the second hydraulic chamber 43. The top of the third hydraulic rod 46 is fixedly connected to a second wind plate 47. Through the combination of components such as the pressing block 41, the first wind plate 42, the receiving groove 48, the counterweight rod 45, the second hydraulic chamber 43, the second hydraulic rod 44, and the third hydraulic rod 46, the specific functions of the rotating device 4 are realized. The pressing block 41 is attached to the second airbag 35 for transmitting pressure. The first wind plate 42 and the second wind plate 47 are used to capture the wind force and achieve automatic adjustment. The second hydraulic chamber 43 and the hydraulic rods are used to adjust the angle of the wind plate, thereby realizing the wind resistance function. A spring is movably sleeved on the outer wall of the second hydraulic rod 44. The first wind plate 42 is hinged to the top of the pressing block 41. By movably sleeving a spring on the outer wall of the second hydraulic rod 44, the elastic buffering function of the rotating device 4 is increased, improving the stability and reliability of the device under strong wind conditions. At the same time, the first wind plate 42 is hinged to the top of the pressing block 41, further optimizing the movement mode of the wind plate, enabling it to adjust the angle more flexibly and better cope with wind forces from different directions.

[0032] When the above device is in specific use, the second airbag 35 drives the pressing block 41 to rise. The pressing block 41 drives the hinged first wind plate 42 to rotate clockwise around the hinge point. When the first wind plate 42 rotates, the counterweight rod 45 slides inside the receiving groove 48. The counterweight rod 45 presses the second hydraulic rod 44, and the spring is compressed. During the process of the second hydraulic rod 44 moving to the right, it drives the third hydraulic rod 46 to move to the left. The third hydraulic rod 46 drives the second wind plate 47 to extend, being able to intervene in the air flow path earlier, guiding the oncoming wind to the farther outside, and reducing the probability of directly impacting the base 1.

[0033] When the above-mentioned device is specifically used, as described above, it is only a preferred specific embodiment of the present invention. However, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. A falling limit device for installing a power transformer, characterized in that Including: Base; Power transformer base, which is assembled on the top of the base; Protection board, which is assembled on the top of the base; A first connecting rod is fixedly connected to the side of the protection board, a first diversion plate is hinged to the back of the first connecting rod, a second diversion plate is hinged to the bottom of the first diversion plate, a second connecting rod is fixedly connected to the side of the base, an electric telescopic rod is assembled on the top of the base, the front of the inner wall of the base is rotatably connected to a rotating rod through a bearing, a connecting rope is fixedly connected to the outer wall of the rotating rod, a counterweight ball is fixedly connected to the bottom of the connecting rope, and a transmission component for driving the second diversion plate and the rotating rod is assembled on the top of the base.

2. The falling limit device for installing a power transformer according to claim 1, characterized in that The transmission component includes a circular gear fixedly sleeved on the outer wall of the rotating rod, a sliding plate is fixedly connected to the front of the inner wall of the base, a rack is slidably connected to the outer wall of the sliding plate, a connecting plate is fixedly connected to the side of the inner wall of the base, a pulley is rotatably connected to the front of the connecting plate through a bearing, a steel wire rope is fixedly connected to the bottom of the rack, and one end of the steel wire rope away from the rack is fixedly connected to the side of the second diversion plate.

3. The falling limit device for installing a power transformer according to claim 2, characterized in that, The second connecting rod is slidably connected to the front of the second diversion plate, and the steel wire rope is wound around the outer walls of the two pulleys.

4. The falling limit device for the installation of a power transformer according to claim 3, characterized in that, The circular gear meshes with the rack.

5. The falling limit device for installing a power transformer according to claim 1, wherein, An expansion device for limiting and damping the power transformer is assembled on the top of the base.

6. The falling limit device for installing a power transformer according to claim 5, characterized in that, The expansion device includes a side rod fixedly sleeved on the outer wall of the output end of the electric telescopic rod, a conical block is fixedly connected to the side of the side rod, the power transformer base is placed on the top of the conical block, a slider is fixedly connected to the top of the base, a first airbag is fixedly connected to the top of the base, a second airbag is fixedly connected to the side of the protection board, and the power transformer base is slidably connected to the outer wall of the slider.

7. The falling limit device for installing a power transformer according to claim 6, characterized in that, A first hydraulic chamber is fixedly connected to the top of the base, the first hydraulic chamber is fixedly connected to and communicated with the first airbag, a first hydraulic rod is slidably connected to one end of the inside of the first hydraulic chamber, the first hydraulic rod is fixedly connected to the front of the side rod, a connecting pipe is fixedly connected to the top of the first hydraulic chamber, one end of the connecting pipe away from the first hydraulic chamber is fixedly connected to the bottom of the second airbag, and the first airbag and the second airbag are respectively assembled inside a limit box.

8. The falling limit device for the installation of a power transformer according to claim 1, characterized in that, A rotating device for further improving the wind resistance effect is assembled on the top of the base.

9. The falling limit device for installing a power transformer according to claim 8, characterized in that, The rotating device includes a pressing block movably penetrating through the protection board and extending upward, the bottom of the pressing block is attached to the second airbag, a first wind board is hinged to the top of the protection board, a receiving groove is formed in the inner wall of the first wind board, a counterweight rod is slidably connected to the inner wall of the receiving groove, a second hydraulic chamber is fixedly connected to the bottom of the inner wall of the receiving groove, a second hydraulic rod is slidably connected to one end of the inside of the second hydraulic chamber, a third hydraulic rod is slidably connected to one end of the inside of the second hydraulic chamber, and a second wind board is fixedly connected to the top of the third hydraulic rod.

10. The falling limit device for installing a power transformer according to claim 9, characterized in that, A spring is movably sleeved on the outer wall of the second hydraulic rod, and the first wind board is hinged to the top of the pressing block.

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