A method for hoisting a transformer body

Abstract

The present application belongs to the technical field of transformer transportation, and relates to a hoisting method for a transformer body. The design comprises a detachable hoisting ladder structure including a clamping groove type reinforcing rib and a hoisting ladder body. The clamping groove type reinforcing rib is welded on the oil tank groove type reinforcing iron, and four clamping groove type reinforcing ribs are arranged. The hoisting ladder body is assembled on the clamping groove type reinforcing rib, a positioning pin is inserted into the long circular hole of the hoisting ladder body, a fastening bolt is assembled in the blind hole one to fix the positioning pin. A pair of fan-shaped baffles are symmetrically fixed and installed on the front sides of the hoisting ladder body, and the lower end of the fan-shaped baffle is lower than the lower end of the hoisting ladder body. The hoisting rope is assembled at the lower part of the hoisting ladder body, and the protruding edge of the fan-shaped baffle limits the hoisting rope to prevent the hoisting rope from sliding sideways during the hoisting of the transformer body. The hoisting rope and the detachable hoisting ladder structure are used to hoist the transformer body by using the hoisting mechanical equipment. The present application avoids a large amount of welding work, reduces the number of hoisting ropes and simplifies the hoisting process.

Description

Technical Field

[0001] This invention belongs to the field of transformer transportation technology, specifically relating to a method for lifting a transformer body. Background Technology

[0002] Large power grids play a crucial role in inter-provincial and inter-regional power transmission, and ultra-high voltage (UHV) transformers are like the "heart" of these grids, playing a vital role in voltage transformation and power distribution. Currently operating oil-immersed UHV transformers typically have oil tanks holding around 100 tons of oil, and the overall weight of the transformer itself reaches approximately 400 tons. Not only is the transformer itself extremely heavy, but the numerous and heavy internal components, such as coils, cores, and switches, place extremely stringent requirements on the safety and stability of its transport. The overall transport and handling of UHV transformers is an exceptionally challenging undertaking.

[0003] Traditionally, transformer bodies have been constructed using welded, integrated lifting arms, directly welded to the interior of the tank's reinforcing steel. Typically, eight lifting arms are welded onto the tank body, making the welding process difficult and demanding. This not only presents significant challenges and repetitive tasks for welders but also requires numerous lifting ropes and involves complex lifting procedures. Currently, the lifting structure with directly welded lifting arms inside the tank's reinforcing steel urgently needs structural improvements to meet the requirements for the transfer and transportation of ultra-high voltage and extra-high voltage transformer bodies. Summary of the Invention

[0004] To address the technical problems of outdated and numerous welding and fixing methods used for ultra-high voltage and extra-high voltage transformers, which involve difficult welding, demanding process requirements, and complex lifting procedures, this invention provides a method for lifting the transformer body. The technical solution adopted by this invention is as follows: A method for lifting a transformer body is provided, comprising a detachable lifting structure including a slotted reinforcing rib and a lifting body. The slotted reinforcing rib includes an integrally formed elongated welded plate and a lifting mounting plate located at the upper end of the elongated welded plate. A snap-fit ​​groove is provided on the lower outer edge of the elongated welded plate, and a lifting slot is provided at the lower end of the lifting mounting plate. A positioning pin assembly hole is provided on the lifting mounting plate above the lifting slot. The lifting body is a semi-circular disc-shaped structure. A vertical snap-fit ​​mounting groove is provided in the upper middle position of the lifting body, and a horizontal elongated hole is provided inside the middle position of the middle part of the lifting body. A pair of blind holes are provided on the front of the lifting body. The process of lifting the transformer body includes the following steps: A groove is made on the tank-type reinforcing iron of the transformer body to match the lower end of the slot-type reinforcing rib. The lower end of the slot-type reinforcing rib is inserted into the groove and beveled and welded. After welding, the sharp corners and burrs are removed and the surface is polished smooth. A total of four slot-type reinforcing ribs are symmetrically and evenly set on the tank-type reinforcing iron. The position of the four slot-type reinforcing ribs ensures the stability of the transformer body during the lifting process. Insert the mounting body into the mounting slot, insert the part of the mounting body at the bottom of the mounting groove into the mounting slot, insert the positioning pin into the elongated hole of the mounting body, and simultaneously pass through the positioning pin mounting hole. Blind hole one is located on the outer side of both ends of the positioning pin, and fastening bolts are installed in blind hole one to fix the positioning pin. A pair of fan-shaped baffles are symmetrically fixed on both sides of the front of the hoist body, with the lower end of the fan-shaped baffles being lower than the lower end of the hoist body. The lifting rope is attached to the lower part of the lifting frame. The protruding edge of the fan-shaped baffle restricts the lifting rope and prevents the lifting rope from slipping during the lifting of the transformer body. The transformer body is lifted by lifting machinery using the lifting rope and the detachable lifting frame structure.

[0005] Preferably, a lifting hole is provided above the locating pin assembly hole, through which the welded slot-type reinforcing rib is lifted and assembled.

[0006] Preferably, a pair of transfer lugs are symmetrically fixed on the upper part of the lifting body, and the lifting body is transferred and installed through the transfer lugs.

[0007] Preferably, a pair of fixed base plates are symmetrically fixed on both sides of the back of the hoist body, thereby increasing the contact area between the hoist body and the oil tank groove-type reinforcing iron.

[0008] Preferably, several blind holes are made at the edge of the lifting body below the first blind hole, and through holes corresponding to the second blind holes are made on the fan-shaped baffle. Fastening bolts are installed in the through holes and the second blind holes, and the fan-shaped baffle is detachably installed through the second blind holes.

[0009] Preferably, the material of the lifting body and the slotted reinforcing rib is low alloy steel plate, which improves the mechanical strength of the detachable lifting structure.

[0010] The present invention has the following advantages: This invention requires only four lifting structures to meet the requirements for lifting and transporting the transformer tank. This not only avoids extensive welding work but also reduces the number of lifting ropes and simplifies the lifting process. It is ready to use immediately, saving time and effort. The detachable lifting structures are simply installed on the transformer tank before the transformer body is lifted and transported. The detachable lifting structures are easy to install, robust, durable, and reusable, saving costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the slotted reinforcing rib structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the hoisting body according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the assembly structure of the addition of a fan-shaped baffle and a fixed base plate to the lifting body in an embodiment of the present invention; Figure 4 This is a schematic diagram of the assembly and use of the detachable hanging structure according to an embodiment of the present invention.

[0012] Among them, 1-lifting body, 2-fan-shaped baffle, 3-slot-type reinforcing rib, 4-oil tank slot-type reinforcing iron, 5-fixed base plate, 6-transfer lifting lug, 7-positioning pin, 8-lifting hole, 9-positioning pin assembly hole, 10-lifting slot, 11-slot groove, 12-blind hole one, 13-blind hole two. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: A method for lifting a transformer body includes a detachable lifting structure comprising a slotted reinforcing rib 3 and a lifting body 1, such as... Figure 1 As shown, the slotted reinforcing rib 3 includes an integrally formed elongated welded plate and a hanging mounting plate located at the upper end of the elongated welded plate. A snap-fit ​​groove 11 is formed on the lower outer edge of the elongated welded plate of the slotted reinforcing rib 3. The snap-fit ​​groove 11 is used to insert the lower part of the slotted reinforcing rib 3 into the oil tank groove-type reinforcing iron 4 and then weld it in place. A hanging mounting groove 10 is formed at the lower end of the hanging mounting plate of the slotted reinforcing rib 3. The hanging mounting groove 10 is used for movably installing the hanging body 1. A lifting hole 8 and a positioning pin assembly hole 9 are formed from top to bottom on the hanging mounting plate above the hanging mounting groove 10. The lifting hole 8 is used to pull the slotted reinforcing rib 3, and the positioning pin assembly hole 9 is used to fix the hanging body 1 by a positioning pin 7.

[0014] The lifting body 1 is detachably installed in the lifting slot 10, such as... Figure 2As shown, the lifting body 1 is a semi-circular disc-shaped structure with a certain thickness. A vertical snap-fit ​​mounting groove is opened in the middle of the lifting body 1. The upper end of the snap-fit ​​mounting groove is open and the lower end is closed. The width and height of the snap-fit ​​mounting groove match the lifting mounting plate of the slot-type reinforcing rib 3. The lower part of the lifting body 1 is inserted into the lifting slot 10. A horizontal elongated hole is opened inside the middle of the lifting body 1. The elongated hole intersects the snap-fit ​​mounting groove perpendicularly. A positioning pin 7 is inserted into the elongated hole and passes through the positioning pin assembly hole 9. According to the length of the positioning pin 7, a blind hole 12 is opened on the front of the lifting body 1. The blind hole 12 is located on the outer side of both ends of the positioning pin 7. Fastening bolts are screwed into the blind hole 12 to fix the positioning pin 7. A pair of transfer lugs 6 are symmetrically fixed on the upper part of the lifting body 1 by welding. The transfer lugs 6 facilitate the pulling and transferring of the lifting body 1. Several blind holes 13 are made at the edge of the lifting body 1 below the blind hole 12. The blind holes 13 are used to fix the fan-shaped baffle 2. The fan-shaped baffle 2 can be detached by the blind holes 13 and the fastening bolts.

[0015] like Figure 3 As shown, a pair of fixed base plates 5 are symmetrically fixedly installed on both sides of the back of the lifting body 1 by welding. The fixed base plates 5 can increase the contact area between the lifting body 1 and the tank groove reinforcing iron 4, avoiding stress concentration and causing severe local deformation of the tank groove reinforcing iron 4 of the transformer oil tank. Considering the possible swaying factors during the transportation of large transformers, which may cause the lifting rope to deviate from the contact center with the bottom of the lifting body 1, or even cause the whole body to overturn, a pair of sector-shaped baffles 2 are symmetrically fixedly installed on both sides of the front of the lifting body 1 by bolt connection. The fastening bolts are screwed into the blind hole 13, and the sector-shaped baffles 2 are fixedly installed on the front of the lifting body 1. The sector-shaped baffles 2 are used to restrict the lifting rope and prevent the lifting rope from slipping during the lifting of the transformer body.

[0016] The detachable lifting body 1 is made of δ130 thick low alloy steel plate, and the slotted reinforcing rib 3 is made of δ40 thick low alloy steel plate. The low alloy steel plate has higher strength, and its effective contact area with the lifting rope is larger, resulting in better stress distribution.

[0017] A groove is cut into the tank-type reinforcing iron 4 of the transformer oil tank to match the lower end of the slotted reinforcing rib 3. The lower end of the slotted reinforcing rib 3 is inserted into the groove and then beveled and welded. After welding, sharp corners and burrs are removed and the surface is ground smooth. Figure 4 The diagram shown is a schematic representation of the assembly and use of the detachable hanging structure according to an embodiment of the present invention.

[0018] In this embodiment of the invention, to reliably fix the detachable lifting body 1, the main reliance is on the structural cooperation of the positioning pin 7 and the slot-type reinforcing rib 3. The lifting slot 10 can effectively lock the lifting body 1 to prevent it from moving accidentally, thereby realizing the detachable function of the lifting structure.

[0019] In the embodiments of the present invention, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.

[0020] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A method for lifting a transformer body, characterized in that, The design includes a detachable hanging structure with a slotted reinforcing rib and a hanging body. The slotted reinforcing rib includes an integrally formed long strip welded plate and a hanging mounting plate located at the upper end of the long strip welded plate. A snap-fit ​​groove is opened on the lower outer edge of the long strip welded plate, and a hanging slot is opened at the lower end of the hanging mounting plate. A positioning pin assembly hole is opened on the hanging mounting plate above the hanging slot. The hanging body is a semi-circular disc-shaped structure. A vertical snap-fit ​​mounting groove is opened in the middle of the upper part of the hanging body. A horizontal elongated hole is opened in the middle of the middle part of the hanging body. A pair of blind holes are opened on the front of the hanging body. A pair of fixed base plates are symmetrically fixed on both sides of the back of the hoist body, which increases the contact area between the hoist body and the oil tank groove-type reinforcing iron. Several blind holes are made at the edge of the hanging body below the first blind hole. Through holes corresponding to the second blind holes are made on the fan-shaped baffle. Fastening bolts are installed in the through holes and the second blind holes. The fan-shaped baffle is detachably installed through the second blind hole. The process of lifting the transformer body includes the following steps: A groove is made on the tank-type reinforcing iron of the transformer body to match the lower end of the slot-type reinforcing rib. The lower end of the slot-type reinforcing rib is inserted into the groove and beveled and welded. After welding, the sharp corners and burrs are removed and the surface is polished smooth. A total of four slot-type reinforcing ribs are symmetrically and evenly set on the tank-type reinforcing iron. The position of the four slot-type reinforcing ribs ensures the stability of the transformer body during the lifting process. Insert the mounting body into the mounting slot, insert the part of the mounting body at the bottom of the mounting groove into the mounting slot, insert the positioning pin into the elongated hole of the mounting body, and simultaneously pass through the positioning pin mounting hole. Blind hole one is located on the outer side of both ends of the positioning pin, and fastening bolts are installed in blind hole one to fix the positioning pin. A pair of fan-shaped baffles are symmetrically fixed on both sides of the front of the hoist body. The lower end of the fan-shaped baffles is lower than the lower end of the hoist body to restrict the hoisting rope. The lifting rope is attached to the lower part of the lifting frame. The protruding edge of the fan-shaped baffle restricts the lifting rope and prevents the lifting rope from slipping during the lifting of the transformer body. The transformer body is lifted by lifting machinery using the lifting rope and the detachable lifting frame structure.

2. The method for lifting a transformer body according to claim 1, characterized in that, A lifting hole is provided above the locating pin assembly hole, through which the welded slot-type reinforcing rib is lifted and assembled.

3. The method for lifting a transformer body according to claim 1, characterized in that, A pair of transfer lugs are symmetrically fixed on the upper part of the hoisting body, and the hoisting body is transferred and installed through the transfer lugs.

4. The method for lifting a transformer body according to claim 1, characterized in that, The lifting body and the slotted reinforcing ribs are made of low-alloy steel plates, which improve the mechanical strength of the detachable lifting structure.

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