JPH02205004A - Split type transformer - Google Patents

Abstract

PURPOSE:To shorten the term of work from shipment preparation to field installation in a factory by mutually bonding the reinforcing materials of adjacent tanks on assembly and forming mechanically firm integral structures in split type transformers composed of independent units. CONSTITUTION:The tanks 1 of split type transformers in which contents are housed respectively have reinforcing materials having strength resisting a vacuum and the increase of internal pressure, and cover plate reinforcements 2, bottom plate reinforcements 3 and sidewall reinforcements 4 as mutually adjacent reinforcing materials are abutted while being clamped by bolts 5 respectively. A test is completed, parts getting trouble on transport and dimensions are removed, and wire ropes 8 are stretched to the beam 6 of a hanging stretching type trailer and hanging lugs 7 mounted to the tanks 1 as each tank is left as it is bonded and the tanks are hanging-stretching transported. The tanks are unloaded from the trailer, the bolts 5 clamping each tank are removed, and the tanks are carried into transformer chambers at every unit. The tanks are carried in, each tank 1 is coupled and unified by the bolts 5 again, and moved to normal erection locations by drawing lugs 9, jacks are disposed to jack bosses 10 set up to the tanks 1, and the tanks are centered integrally, thus completing installation operation at a time.

Description

Detailed Description of the Invention (Objective of the Invention) (Industrial Field of Application) The present invention particularly relates to a method for combining a plurality of transformer units for bulk transportation and for constructing a transformer tank for easy installation. This invention relates to a split type transformer with an improved coupling structure.

(Prior Art) In recent years, construction of substations in urban areas has been increasing for the purpose of reducing power transmission loss. For this reason, it has become common to construct substations underground in buildings as a measure to avoid noise, aesthetics, and other issues with the living environment. On the other hand, even in substations built in mountainous areas, it is customary to install power generation and substation equipment underground for reasons such as environmental protection, lack of flat land, and measures to prevent snow accumulation.

In the installation situation, the size of the transformer unit is more influenced by the size of the entrance hole into the basement of the building and the access path to the installation location than by the installation space at the installation location, which greatly influences the construction cost. It becomes a factor.

For this reason, it becomes necessary to divide the transformer body into individual units and transport them within the building.

For the above reasons, the conventional method and structure for loading transformer units divided into multiple units onto a freight car or trailer, and the assembly and installation method at a location inside the building will be explained in the second section.
This will be explained with reference to the drawings and FIG. Both examples are loaded on Schnabel-type freight cars or trailers.

Figure 2 shows that after connecting the specially manufactured transport beam (■) with the support beam of a Schnabel-type freight car or trailer, the transport beam H is connected to the support beam (H) of a Schnabel-type freight car or trailer using the fixing material U and fastening bolts installed on each split transformer tank. This is a method of transporting the product by fixing it on the machine. According to this method, it is necessary to manufacture a strong transport beam, ■.

There are disadvantages such as an increase in the number of loading and unloading operations on freight cars or trailers.

In addition, when installing the transformer after it has been brought into the building, the number of jack-ups and movements increases depending on the number of divided units.Although not shown in the diagram, it is necessary to install connection ducts, etc. that house the internal leads connecting each divided unit. The centering work of each unit takes work into consideration, and it takes time, and it also has the drawbacks that slight errors in the centering work can lead to forced installation of connecting ducts, etc., and cause quality problems such as oil leaks.

Figure 3 shows a split transformer tank with hinge bases on both sides that can be directly connected to a Schnabel-type freight car or trailer.
1 and the other hinge 14 is used for transport by structurally integrating the tank with an adjacent tank via a temporary connecting member exclusively for transport.

According to this method, the work of loading and unloading the transformer onto a freight car or trailer can be completed in -1 times each, and since the loading state is different from the assembled state in the factory, it takes time to set up the transformer before loading. This method has drawbacks such as the need to manufacture a strong temporary connecting material 15 exclusively for transportation. Also, the installation and assembly work at the installation site has the same drawbacks as described in the explanation of FIG.

(Problems to be Solved by the Invention) The above-mentioned problems can be solved by combining reinforcing materials of adjacent tanks during one assembly of a split transformer consisting of independent unit units to form a mechanically strong integrated structure. The purpose is to eliminate the drawbacks of conventional structures, shorten the construction period from preparation for shipment at the factory to on-site installation, and provide a split-type transformer with excellent quality.

[Structure of the invention]

(Means for Solving the Problems) In the split transformer of the present invention, the tank cover plate reinforcement, side wall reinforcement, and bottom reinforcement of adjacent split transformers are fastened and connected with bolts when assembled in the final state. It is characterized by being constructed into an integral structure.

(Function) In the present invention, during transportation and jacking up, compressive force mainly acts on the fastening portion of the tank's lid plate reinforcement, and tensile force mainly acts on the fastening bolts of the bottom plate reinforcement, thereby reinforcing the side wall. The comrade's fastening bolts mainly bear shearing force, but the tank coupling structure has a stable structure, and the size and number of fastening bolts can be freely selected according to the weight of the unit transformer.

(Example) An example of the structure according to the present invention will be described below with reference to the drawings. FIG. 1 shows the connection structure and suspension of the split transformer according to the present invention when it is attached to a trailer and transported.

In Figure 1, the tops of the tanks of the split transformers each containing their contents have reinforcing materials that have the strength to withstand vacuum or an increase in internal pressure in the event of an accident. Reinforcement of the lid plate in some places? -1 While butting the bottom plate reinforcement main and side wall reinforcement soil as shown in the diagram,
Fasten each with bolts 5.

This appearance remains the same whether it is assembled in the factory, transported by freight car or trailer, or installed on site. With this structure, independent split-type transformers are constructed into a mechanically strong integrated structure□.

Finished testing at the factory □Although omitted in Figure 1 in the next section, we removed parts that would be a dimensional obstacle during transportation, such as the cooler, conservator, and the connecting duct for storing the internal leads connecting the split units. After that, with each tongue still connected, wire ropes 8 are hung around the beam 6 of the trailer and the hanging ears provided on the tank, and the hanger is transported.

After arriving at the power plant or substation, the tanks are unloaded from the trailer, the bolts connecting each tank are removed, each unit is lowered through the building entrance hole and the entrance path, and transformed using a trolley or roller puller. Transport it to the container room.

After being transported to the transformer room, the tops of each tank were once again fastened together using Bordeaux screws at a location where it is easy to reassemble them, and then moved to the official installation location using the pull tabs 9. The installation work can be completed in one go by placing the jacks in the center and centering them in one piece.

〔Effect of the invention〕

As explained above, according to the present invention, by bolting the reinforcing members of adjacent tanks of a split transformer, the split transformer can be made into a mechanically extremely strong integral structure, and the final assembly This makes it possible to transport the products in bulk without using temporary transport connecting materials. Also, loading onto freight cars or trailers.

Loading and unloading time can be significantly reduced.

In addition, reassembly inside the transformer room can be performed by simply tightening bolts, and there is no need for dimensional changes.Furthermore, after reassembling in a location where it is easy to assemble, move it to the official installation location and perform integral centering. This also prevents quality problems such as oil leakage due to forced installation of internal lead connection ducts and cooler oil piping, etc. that connect each unit due to misalignment of each unit. .

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of a split type transformer of the present invention, and FIGS. 2 and 3 are front views for explaining a conventional method of transporting a split type transformer.

Claims (1)

[Claims] In a split type transformer consisting of multiple units,
A split type transformer characterized in that the reinforcing materials of adjacent tanks are firmly connected to form an integral structure, and the structure is configured to be directly fixed to the beam of a suspended freight car or trailer in a factory assembled state for transportation. .