JPH07245027A - Insulating support - Google Patents

Abstract

PURPOSE:To improve the joining strength by inserting an FRP pin into a through hole formed in the diameter of an insulator made of FRP and a flange made of a metal and making the eslasticity of the pin be close to the elasticity of the insulator, regarding an insulating support made of FRP and having flanges made of a metal in the outer circumferences of the both ends of the insulating support made of FRP. CONSTITUTION:Glass fiber-reinforced filament winding pipe (epoxy resin, glass roving 30 degree wound) is formed to be an insulator 3 made of FRP and having 170 (inner diameter) X170 (outer diameter) X1000-mm (height) size. To the outer circumferences of both ends of the insulator 3, flanges 2 made of metal and having 200 (inner diameter) X250 (outer diameter) X75mm (height) and 50mm width size are attached. Meanwhile, in the inner circumferences of the both ends of the insulator 3, reinforcing insulating inner cylinders 4 made of the same material as the insulator 3 and having 140 (inner diameter) X170 (outer diameter) X100mm (height) size are installed. Through holes are formed in the diameter direction of the flanges 2, the insulator 3, and the insulating inner cylinders 4 and a plurality of puns 2 made of FRP and havinsg22mm diameter are inserted into the through holes. The elasticity of the pins is made to be close to the elasticity of the insulator 3 and the insulating inner cylinders 4.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to improvements in insulating struts for high voltages.

[0002]

2. Description of the Related Art A high-strength FRP (fiber reinforced plastic) insulator is used for the main body of an insulating column for high voltage, and metal flanges for fixing to electrodes and floors are provided on the outer peripheries of both ends thereof. Is installed. Conventional insulation stanchions
As shown in FIG. 3, metal flanges 2 are attached to the outer peripheries of both ends of the FRP insulator 3, and through holes are provided in the radial direction of the FRP insulator 3 and the metal flange 2, and metal pins are provided in the through holes. 5 is inserted to fix the FRP insulator 3 and the metal flange 2. In FIG. 3, reference numeral 4 is a reinforcing insulating cylinder made of FRP.

[0003]

When a horizontal displacement is applied to the insulating column, a bending moment acts in the radial direction of the insulating column. At this time, the maximum stress is applied to the end of the insulating support. Specifically, when the FRP insulator is deformed by a large bending moment, a force acts to detach the FRP insulator from the metal flange fixed to the floor or the like.

However, since the FRP insulator and the metal flange are fixed by the metal pin, the reaction force of the above-mentioned force causes the metal pin to generate a stress that pushes the metal pin in a direction opposite to the bending moment. Moreover, the metal pin and FRP
Since the elastic modulus of the metal is large with respect to the contact stress with the insulating body, the temporarily deformed metal pin returns to the original state, but as shown in FIG. 4, the FRP insulating body 3 and the FRP reinforcing insulation are used. The through hole provided in the cylinder 4 is deformed into an inclined shape, and a gap 6 between the outer wall of the innermost through hole and the metal pin 2 is formed.
Becomes large, and further, a step is formed at the ends of the metal flange 2, the FRP insulator 3, and the reinforcing insulating cylinder 4, which is in a dangerous state for use as an insulating column.

The present invention is to provide an insulating support column in which the elastic modulus of the pin is brought close to that of the FRP insulator, and the pin and the FRP insulator are deformed in the same manner so that the above-mentioned drawbacks do not occur.

[0006]

SUMMARY OF THE INVENTION The present invention is an insulating column having metal flanges attached to the outer circumferences of both ends of an FRP insulator, and a through hole is provided in the radial direction between the FRP insulator and the metal flange. The present invention relates to an insulating support column in which a FRP pin is inserted into the through hole to fix the two.

In the present invention, the pin does not necessarily have to be made of the same material as the FRP insulator, and there is no particular limitation as long as it is made of FRP having an elastic modulus similar to that of the insulator. In the FRP used for the insulator and the pin, the F
The resin contained in RP is preferably a thermosetting resin such as epoxy resin, polyester resin, melamine resin, or silicone resin, and the fiber used is an insulating and high-strength fiber such as glass fiber or ceramic fiber. Is preferred.

The diameter of the pin is preferably as large as possible, and when the pin is inserted into the through hole, it is preferable that there be no gap between them. If there is a gap, an adhesive may be applied to eliminate the gap. The number of pins to be inserted into the through holes is not particularly limited, but it is preferable to use about 8 to 16 because it is excellent in strength.

As the metal used for the metal flange, mild steel, cast steel, cast iron, brass, gun metal, aluminum and the like can be used without any particular limitation. Among them, mild steel, cast steel,
It is preferable to use cast iron and gun metal because they are excellent in strength.

In the present invention, if necessary, a reinforcing cylinder, plate, rod or the like is attached to the inner circumference of the FRP insulator.
There are no particular restrictions on the material of the reinforcing cylinder, plate, rod, etc. as long as it is strong in strength.

[0011]

The present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an insulating column according to an embodiment of the present invention, which is a glass fiber reinforced filament winding pipe (G-FW).
P) (epoxy resin, glass roving 30 degrees winding, made by Hitachi Chemical Mold) 170 inner diameter x 200 outer diameter x height 1
Molded to a size of 000 mm to form the FRP insulator 3,
A metal flange (mild steel ... SS-41) 2 having an inner diameter of 200 × outer circumference 250 × height of 75 mm and a flange width of 50 mm is attached to the outer peripheries of both ends of the FRP insulator 3. On the inner periphery of both ends, a reinforcing insulating cylinder 4 made of the same material as the FRP insulator 3 and having an inner diameter of 140 x an outer diameter of 170 x a height of 100 mm is attached. Furthermore, metal flange 2, F
Through holes are provided in the radial direction of the RP insulator 3 and the reinforcing insulating cylinder 4, and eight FRP pins (G-FWP ... Tenryu Kogyo) 1 having a diameter of 22 mm are inserted into the through holes. There is.

Next, the insulating pillar and the steel (S
Regarding the conventional insulating support using C45C) pins, a metal flange on one side was fixed to a jig and a bending moment was applied to the insulating support by applying a load to the metal flange on the other side, and the fracture value was measured. As a result, the insulating support pillar according to the present invention did not break even at 92120 N · m (9400 kg · m), but the conventional insulating support pillar using the steel pin was 4
It was destroyed at 1160 N ・ m (4200 kg ・ m).

Further, when the pin insertion portion of the insulating pillar according to the present invention is examined, as shown in FIG. 2, the elastic modulus of the pin is FR.
Since it is similar to the P insulator 3 and the reinforcing insulating cylinder 4, it was confirmed that the deformation of the pin due to the contact stress was deformed in the same way as the through hole and no gap was formed between the through hole and the outer wall. Was done.

[0014]

EFFECT OF THE INVENTION According to the present invention, it is an industrially very suitable insulating strut with excellent joint strength between the FRP insulator and the metal flange.

[Brief description of drawings]

FIG. 1 is a sectional view of an insulating column according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing a pin insertion portion after a bending moment is applied to the insulating column according to the embodiment of the present invention shown in FIG.

FIG. 3 is a cross-sectional view of a conventional insulating pillar using a metal pin.

4 is a partially enlarged cross-sectional view showing a pin insertion portion after applying a bending moment to the conventional insulating column shown in FIG.

[Explanation of symbols]

 1 FRP Pin 2 Metal Flange 3 FRP Insulator 4 Insulation Cylinder 5 Metal Pin 6 Gap

Claims (1)

[Claims] 1. An insulating support column having metal flanges attached to the outer circumferences of both ends of an FRP insulator, wherein a through hole is provided in the radial direction between the FRP insulator and the metal flange, and the FRP pin is provided in the through hole. Insulated stanchion that inserts and fixes both.