JP2014002874A - Insulation operation rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulation operation rod which is reduced in size and weight and excellent in mechanical characteristics and creeping insulation characteristics.SOLUTION: An insulation operation rod includes: an insulation rod 1 composed of a lamination material laminated by impregnating glass fiber into an insulation resin; an insulation pleat 2 which is provided in the outer periphery of the insulation rod 1 and has a plurality of pleats made of a flexible insulation material; and female screws 3a, 3b which are provided at both ends of the insulation rod 1 and by which a coupling member connected to a movable shaft and an operation shaft of an operation mechanism are fastened and fixed.

Description

  Embodiments described herein relate generally to an insulating operation rod that connects a contact point that can be freely separated and operated and an operation mechanism that opens and closes the contact point.

  Conventionally, in order to obtain excellent mechanical characteristics and electrical characteristics, an insulating operation rod that connects a vacuum valve and an operation mechanism has been cast using an epoxy resin (for example, see Patent Document 1). Further, since the creeping insulation characteristics depend on the surrounding environment, there are some which have creases and increase the creeping distance (see, for example, Patent Document 2).

  However, in recent vacuum circuit breakers, the capacity has increased, the operating force tends to increase, and it has been increasingly used in harsh environments. For this reason, there has been a demand for an insulating operation rod that further improves mechanical characteristics and creeping insulation characteristics. If the outer shape of the cast product made of epoxy resin is made larger and the number of creases is increased, the mechanical characteristics and the creeping insulation characteristics can be improved, but the size and weight are increased.

JP 2010-46922 A JP 2006-179290 A

  The problem to be solved by the present invention is to provide an insulating operation rod capable of suppressing an increase in size and weight and improving mechanical characteristics and creeping insulation characteristics.

  In order to solve the above problems, an insulating operation rod according to an embodiment includes an insulating rod made of a laminated material using glass fibers, and a plurality of pleats made of a flexible insulating material while being provided on the outer periphery of the insulating rod. And an internal thread that is provided at both ends of the insulating rod and to which the connecting member is fastened and fixed.

Sectional drawing which shows the structure of the insulation operation rod which concerns on Example 1 of this invention. Sectional drawing which shows the structure of the insulation operating rod which concerns on Example 2 of this invention. Sectional drawing which shows the structure of the insulation operating rod which concerns on Example 3 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, an insulating operation rod according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a cross-sectional view illustrating a configuration of an insulating operation rod according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the insulating operation rod includes a cylindrical insulating rod 1 and an insulating fold 2 having a plurality of folds provided on the outer periphery of the insulating rod 1.

  The insulating rod 1 is made of a laminated material in which an insulating resin is impregnated with glass fibers such as a glass epoxy laminated rod and a glass polyester laminated rod, and the mechanical strength is enhanced. One end is provided with a first female screw 3a, to which the movable shaft of the vacuum valve is connected. A second female screw 3b is provided at the other end, and the operating shaft of the operating mechanism is connected. The insulating fold 2 is formed by casting a flexible insulating material having water repellency such as silicone rubber directly on the insulating rod 1. The surface of the insulating rod 1 before casting is subjected to degreasing, cleaning, silane coupling treatment, and the like so that the insulating folds 2 are in close contact with each other.

  Thereby, the strong impact force by the opening / closing operation can be shared by the insulating rod 1, and the creeping distance can be increased by the insulating fold 2. Both the insulating rod 1 and the insulating fold 2 can be reduced in weight as compared with the cast product. Since the insulating fold 2 uses a flexible insulating material, it absorbs vibration during opening and closing operations.

  The insulating fold 2 can be formed using a heat-shrinkable tube having flexibility such as polyolefin and fluorine-based polymer.

  According to the insulating operation rod of the first embodiment, since the insulating rod 1 has excellent mechanical strength even with a small diameter, and the insulating crease 2 has excellent creeping insulation characteristics, the overall shape is reduced in size and weight. Can be achieved.

  Next, an insulating operation rod according to a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a cross-sectional view illustrating a configuration of an insulating operation rod according to the second embodiment of the present invention. The difference between the second embodiment and the first embodiment is that a grease layer is provided at the interface of the insulating folds. In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, a grease layer 4 having a thickness of several tens of μm coated with silicone grease is provided between the insulating rod 1 and the insulating fold 2. The insulation fold 2 can be a heat-shrinkable tube as well as a heat-curing type.

  According to the insulating operation rod of the second embodiment, in addition to the effects of the first embodiment, the grease layer 4 is provided at the interface between the insulating rod 1 and the insulating fold 2 so that the insulating properties of the interface can be stabilized. .

  Next, an insulating operation rod according to a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is a cross-sectional view illustrating a configuration of an insulating operation rod according to the third embodiment of the present invention. The third embodiment differs from the second embodiment in that a resin discharge hole is provided in the female screw portion. In FIG. 3, the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, first and second resin discharge holes 5a and 5b are provided at the bottoms of the first and second female screws 3a and 3b, respectively. The male screw of the member to be connected is poured into the female screw 3a, 3b by pouring an epoxy resin adhesive, and the excess resin is discharged from the resin discharge holes 5a, 5b. For this reason, the male screw of the connecting member can be securely fastened and fixed to the female screws 3a and 3b.

  According to the insulating operation rod of the third embodiment, in addition to the effects of the second embodiment, the connecting member can be securely fastened and fixed to the female screws 3a and 3b.

  According to the embodiment described above, an insulating operation rod having a small size and light weight and excellent mechanical characteristics and creeping insulation characteristics can be obtained.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1 Insulating rod 2 Insulating crease 3a, 3b Female thread 4 Grease layer 5a, 5b Resin discharge hole

Claims (4)

An insulating rod made of a laminated material using glass fiber;
An insulating fold provided on the outer periphery of the insulating rod and having a plurality of folds made of a flexible insulating material;
A female screw which is provided at both ends of the insulating rod and to which the connecting member is fastened and fixed;
An insulating operation rod characterized by comprising:   The insulating operation rod according to claim 1, wherein the flexible insulating material is a heat shrinkable tube.   The insulating operation rod according to claim 1, wherein a grease layer is provided between the insulating rod and the insulating fold.   The insulating operation rod according to any one of claims 1 to 3, wherein a resin discharge hole is provided in a bottom portion of the female screw.

Images