JPH03297113A - Winding lifting apparatus - Google Patents

Abstract

PURPOSE:To enhance the quality of an assembly operation at a site, to judge a loss when an abnormality is caused in the course of a process and to reduce it to a minimum by a method wherein an accelerometer is attached to lifting-up metal fittings and an abnormality inside a winding is estimated and diagnosed. CONSTITUTION:Two or more windings 1 are protected by an inner insulating tube and an outer insulating tube 2a, 2b; their surface and their rear surface are supported or clamped by clamping sheets 3a, 3b; a winding unit 19 is constituted. Suspension metal fittings 5 attached to suspension wires 4 are set to the rear surface of the lower-part clamping sheet 3b of the unit 1a; the outside of the wires 4 is bound and fixed by using bands 6a, 6b. A three-direction accelerometer 7 is attached to the metal fittings 5; a wire guide 8 used to stabilize the suspension wires 4 is attached to the upper part of the unit 1a; the wires 4 are hooked to a hook 9 of a crane or the like so as to be lifted up. Thereby, the existence of an abnormality inside the windings during a lifting-up operation can be estimated and diagnosed without disassembling them at the site, and a loss in the course of an assembly operation can be reduced to a minimum.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a winding lifting device for a disassembled and transported transformer for reassembling the core and windings on site.

(Conventional technology) In recent years, transformers have often been installed in mountainous areas with severe transportation conditions, and in this case, transportation of transformers becomes a problem, and large capacity,
In the case of a large transformer, it is conceivable that the contents of the transformer, including the core and windings, be disassembled and transported, and then reassembled on site.

Conventionally, when such disassembly transportation and assembly is adopted, if the winding is lifted during assembly of the contents on site, there is a possibility that the winding may come into contact with surrounding structures, cause a collision, or cause abnormalities such as rapid suspension. In the event of such an abnormality, workers would visually inspect the outside to determine the damage.

(Problem to be solved by the invention) In this method, in order to make the winding more compact during transportation and to improve assembly quality, recent winding configurations in which the surrounding area is covered with an insulating cylinder, clamping plate, or sealing film, etc. Visual inspection inside the windings is impossible due to their presence.

Therefore, when inspecting the inside of the winding, an overhaul is required. Disassembling the windings in a poor local environment compared to the factory setting involves problems such as a drop in quality or the need for an additional on-site drying process due to the contamination of dust and foreign matter and the absorption of moisture by the insulators.

The present invention is used to determine the presence or absence of abnormalities in the winding assembly work results, which is most important for ensuring reliability, in transformers that are disassembled and transported and the core and windings are reassembled on site.
To obtain a winding lifting device that can predict and determine abnormalities inside the winding in addition to visual inspection of the exterior, improve the quality of on-site assembly work, and determine and minimize losses when an abnormality occurs during the process. The purpose is to

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a lifting fitting to minimize the influence on the windings even if abnormal work should occur during on-site winding lifting work. It is equipped with an accelerometer to predict and diagnose abnormalities inside the winding.

(Function) In this way, abnormalities caused to the winding due to a collision during a gust of wind or abnormal work such as rapid suspension can be detected by the accelerometer attached to the winding hanging bracket and diagnosed from the measured value. This makes it possible to determine an abnormality without disassembling the winding.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the structure of a winding unit to be assembled on-site according to the present invention and a state in which the winding unit is lifted up. Two or more windings 1 are protected by inner and outer insulating cylinders 2a and 2b, and the upper and lower surfaces are supported or tightened by clamping plates 3a and 3b, forming a winding unit 1a.

A hanging fitting 5 to be attached to the hanging wire 4 is set on the lower surface of the lower clamping plate 3b of the winding unit 1a, and the outer periphery of the wire 4 is bound and fixed with bands 6a and 8b.

A three-way accelerometer 7 is attached to the hanging fixture 5.

Further, a wire guide 8 for stabilizing the hanging wire 4 is attached above the winding unit 1a, and the wire 4 is hung on a hook 9 of a crane or the like to be lifted.

FIG. 2 is a diagram showing the appearance of the winding unit structure of the present invention. In order to ensure the stability of the winding unit 1a, vertical tightening tools 1 are installed on the outer periphery of the upper and lower tightening plates 3a and 3b of the winding.
The structure is such that 0 is attached.

Two or more hanging fittings 5 of the winding unit la to be assembled on-site are set on the lower surface of the winding lower clamping plate 3b,
Measure stability during lifting. The hanging fitting 5 or the wire 4 and the winding outer periphery insulating cylinder 2b are fixed with a band or the like, and the winding 1 is held against the horizontal load generated during the lifting operation. Furthermore, a wire guide 8 is arranged above the upper clamping plate 3a of the winding,
Prevents shaking during lifting and hanging operations.

Stability due to the weight of one winding is sufficient for vertical loads, but even more stability can be achieved by attaching vertical tightening tools 10 to the outer peripheries of the upper and lower clamping plates 3a and 3b of the winding 1. It is possible to improve your sexuality.

By adopting a lifting device having the winding unit Ha configuration and the accelerometer 7 described in the above embodiment, it is possible to stabilize the winding lifting work during on-site assembly and improve quality, and to prevent abnormalities during the winding lifting work. Even if this occurs, since the accelerometer 7 is attached to the lifting metal fitting 5, it is possible to predict and judge the abnormality inside the winding, and it is possible to minimize the loss when the abnormality occurs.

Figure 3 shows how the accelerometer 7 is connected to the upper clamping plate 3 of the winding unit 1a.
This figure shows an example in which it is attached to the hanging bracket 5, and the same effect as when attached to the hanging metal fitting 5 can be obtained.

The same applies when the accelerometer 7 is attached to the lower clamp 3b.

[Effects of the Invention] As described above, according to the present invention, when two or more windings are preassembled as a winding unit and lifted or transported, an accelerometer for detecting the vibration of the winding unit is attached to the hanging fitting. It is possible to predict whether there is an abnormality inside the winding without having to disassemble it on site during lifting work, and to minimize losses during assembly.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a winding unit according to an embodiment of the present invention suspended by a hanging fitting with an accelerometer attached;
The figure is a front view thereof, and FIG. 3 is a front view showing another embodiment of the present invention. 1... Winding 2a... Inner insulating tube 3a... Upper clamping plate 4... Wire 7... Accelerometer 9... Hook la of crane etc.... Winding unit 2b... Outer insulating tube 3b...Lower clamping plate 5...Hanging fitting 8...Wire guide

Claims (1)

[Claims] In a winding lifting device in which two or more windings are assembled in advance to form a winding unit and this winding unit is hoisted by a hanging fitting, an accelerometer for detecting vibration of the winding unit is attached to the hanging fitting. A winding lifting device characterized by being attached.