JP2010012812A - Section insulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a section insulator minimizing the adhesion of carbon powder on a sliding surface of an insulating member, and easily removing the adhering carbon powder. <P>SOLUTION: In a section insulator 1 for an electric overhead line, a hardly adhering member 5 formed of a carbon powder hardly adhering resin is embedded in an insulating member 2 while its surface is made to agree with a sliding surface 2a with a carbon sliding plate. The hardly adhering member 5 is formed in a slip shape, and a plurality of the members are arranged parallel to each other with a spacing therebetween while being inclined to the axis of the insulating member 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a section insulator that holds and connects two different electric sections in a trolley wire for a train track while electrically insulating each other.

Conventionally, as a section insulator for a train track, for example, one described in Patent Document 1 is known. This is to connect two trolley wires of different electrical systems while being electrically insulated and secured to each other, and between the trolley wires in order to continuously slide the pantograph carbon sliding plate of the train. An insulating member to be passed and a trolley wire connecting fitting fixed to both ends of the insulating member are provided. The insulating member is in the shape of a square bar, and a recess for blocking the adhesion of carbon powder is provided on the sliding surface with the carbon sliding plate of the train. A hard-to-adhere plate of polytetrafluoroethylene, which is a carbon powder hard-to-adhere resin, is fixed in the recess 4. The continuation of the carbon powder scraped from the carbon sliding plate and adhering to the sliding surface of the insulating member is blocked by the edge of the concave portion, thereby preventing dielectric breakdown.
JP 2004-299450 A

In the above conventional section insulator, the carbon powder adhering to the surface of the recess that is not covered with the hard-to-adhere plate is unavoidable due to the long-term use. There is a possibility that they are concentrated and stacked on the step with the edge and finally cross-linked with the carbon powder on the surface of the hard-to-adhere plate, resulting in dielectric breakdown. For this reason, it is necessary for the section insulator to periodically remove the adhering carbon by cleaning the sliding surface of the insulating member. However, it is not easy to remove the carbon adhering to the FRP insulating member.
Therefore, the invention according to this application provides a section insulator that can minimize the adhesion of carbon to the sliding surface of the insulating member and that can easily remove carbon adhered to the sliding surface during cleaning. Is an issue.

In the section insulator 1 for a railway track according to the invention of this application for solving the above-mentioned problems, a difficult adhesion member 5 formed of a carbon powder difficult adhesion resin is formed on the insulating member 2, and the surface of the section insulator 1 is formed with a carbon sliding plate. It is buried in alignment with the sliding surface 2a.
The difficult-to-attach member 5 is formed in an elongated plate shape, and is inclined with respect to the axis of the insulating member 2, and a plurality thereof are arranged in parallel with each other and spaced apart from each other.

According to the section insulator 1 for a railroad track of the invention according to this application, a difficult adhesion member 5 formed of a carbon powder difficult adhesion resin on the sliding surface 2a of the insulating member 2 with the carbon sliding plate has a surface thereof. Since it is embedded in alignment with the sliding surface 2a, the adhesion of carbon to the surface 5a of the difficult-to-attach member 5 on the sliding surface 2a of the insulating member 2 can be minimized, and the difficult-to-attach member 5 at the time of cleaning. The carbon adhering to the surface 5a can be easily removed.
The difficult adhesion member 5 is formed in an elongated plate shape, is inclined with respect to the axis of the insulating member 2, and a plurality thereof are arranged in parallel with each other. Since the contact with only the insulating member 2 is always in contact with the insulating member 2 itself at the same time, the useful life of the difficult-to-attach member 5 which is relatively expensive and easily worn is substantially extended, thereby improving the economy. be able to.
Although the present invention has been described with reference to the accompanying drawings, the present invention is not limited to this.

  Embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a section insulator, FIG. 2 is a bottom view of the section insulator, and FIG. 3 is a partially enlarged sectional view of the section insulator.

  1 and 2, a section insulator 1 is a connection fitting while electrically insulating between adjacent ends of two trolley wires T1 and T2 installed adjacent to each other in the extending direction of a train track with an insulating member 2. Stop at 3. An arc horn 4 is attached to the connection fitting 3.

  The insulating member 2 is composed of a rod-shaped body made of FRP having a rectangular section. A hard-to-adhere member 5 made of carbon powder hard-to-adhere resin is embedded in the insulating member 2 on the sliding surface 2a side on which the pantograph carbon sliding plate slides. The surface 5a of the difficult adhesion member 5 is coincident with the sliding surface 2a.

  The arc horn 4 is configured to come into contact with the carbon sliding plate together with the insulating member 2 up to a predetermined length portion at both ends of the insulating member 2 and bend upward from the middle to leave the carbon sliding plate.

  As a material of the difficult-to-attach member 5, a resin that is hard to adhere carbon powder generated by sliding a pantograph carbon sliding plate, for example, excellent in electrical insulation, arc resistance, friction resistance, heat resistance, etc. A polytetrafluoroethylene resin which is a fluororesin is most suitable.

  As shown in FIG. 2, the hard-to-attach member 5 is formed in an elongated plate shape, and is inclined with respect to the axis of the insulating member 2, and a plurality of the members are arranged in parallel with each other.

  As shown in FIG. 3, dovetail grooves 2 b are formed on the sliding surface 2 a side of the insulating member 2 so as to extend inclined with respect to the axis. The difficult-to-attach member 5 is formed in a cross-sectional dovetail shape that fits into the dovetail groove 2b. The difficult-to-attach member 5 is fitted in the dovetail groove 2b, and is bonded to the insulating member 2 via an adhesive in the dovetail groove 2b.

  When the carbon sliding plate of the train that has traveled while sliding on the lower surface of the trolley wire T1 shifts to the hard-to-attach member 5 in the section insulator 1, the hard-to-attach member 5 is almost always along with the sliding surface 2a of the insulating member 2, Contact the carbon sliding plate. Therefore, the hard-to-attach member 5 does not wear unevenly. Since the carbon powder cut out from the carbon sliding plate is less likely to adhere to the hardly adherent member 5, the continuous carbon powder adhering to the sliding surface 2 a is blocked by the hardly adherent member 5. The carbon powder adheres to the surface 5a of the difficult-to-attach member 5 through long-term use. Therefore, regular cleaning is necessary. The carbon powder adhering to the surface 5a of the difficult-to-attach member 5 can be easily wiped off during regular cleaning. Since the hard-to-attach member 5 always contacts the carbon sliding plate together with the sliding surface 2a of the insulating member 2, the wear progressing degree coincides with that of the insulating member 2.

It is a front view of a section insulator. It is a bottom view of a section insulator. It is a partial expanded sectional view of a section insulator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Section insulator 2 Insulation member 2a Sliding surface 2b Dovetail groove 3 Connection metal fitting 4 Arc horn 5 Difficult adhesion member 5a Surface T1 Trolley wire T2 Trolley wire

Claims (3)

The two ends of the two trolley wires installed adjacent to each other in the direction of the extension of the train line are electrically insulated and stopped, and the pantograph carbon sliding plate is continuously slid in place of the trolley wires. Comprising an insulating member interposed between adjacent ends of two trolley wires,
In the insulating member, a hard adhesion member formed of carbon powder hard adhesion resin, the surface of which is embedded with the sliding surface with the carbon sliding plate,
2. The train line according to claim 1, wherein the hard-to-attach member is an elongated plate and is inclined with respect to an axis of the insulating member, and a plurality of the members are arranged in parallel with each other and spaced apart from each other. Section insulator.   The section insulator for a railroad track according to claim 1, wherein a dovetail groove is formed on a sliding surface side of the insulating member, and the hardly adhering member has a dovetail cross section that fits into the dovetail groove.   The section insulator for a railroad track according to claim 2, wherein the hardly adhering member is fitted into the dovetail groove and adhered to the insulating member in the dovetail groove.

Images