KR200410883Y1 - Connector of a polymer insulator for a cut out switch - Google Patents

Abstract

The present invention is attached to the primary side of the transformer for distribution lines, simplifying the assembly of fastening members for the construction of cut-out switches used as the switchgear of the line during the protection, inspection and repair of the transformer from overvoltage and overcurrent. It is to provide a connection bracket of the polymer insulator for the cut-out switch which is guaranteed to be quick and the manufacturing cost by the simplification of the component.

The object of the present invention is that the upper and lower connection brackets connected to the power supply terminal and the load side terminal connected to the fuse holder is press-bonded to the upper and lower parts of the FRP mandrel, and is formed by wrapping the coupling portion of the mandrel and the mandrel In the insulator for cut-out switches in which a polymer insulating housing is molded,

The upper and lower connection brackets 300 and 400 have cylindrical pipes 310 and 410 coupled to end portions of the mandrel 200 by casting, and plate-shaped coupling plates 320 and 420 coupled to the power supply side terminal or the load side terminal. It is achieved by the connection bracket of the cut-out switch polymer insulator, characterized in that integrally composed of rod-shaped connecting rods (330, 430) bent in a right direction.

Cast molding, upper and lower connection brackets, cylindrical pipes, connecting rods, coupling plates

Description

CONNECTOR OF A POLYMER INSULATOR FOR A CUT OUT SWITCH}

1 is a diagram for explaining a conventional cutout switch.

2 is a view for explaining the insulator used in the conventional cut-out switch.

3 is a perspective view of a polymer insulator to which the present invention is applied.

4 is an exploded perspective view of a polymer insulator to which the present invention is applied.

5 is a cross-sectional view of the polymer insulator applied to the present invention.

6 is an enlarged partial excerpt of FIG. 5.

** Explanation of symbols for main parts of drawings **

100: polymer insulator 110: insulation housing

120: fresh 200: mandrel

300: upper connection bracket 400: lower connection bracket

The present invention relates to the insulator which is attached to the primary side of the transformer for distribution lines and is used for the cut-out switch which is used as the switchgear of the line during the protection, inspection and repair of the transformer against overvoltage and overcurrent. The present invention relates to a connection bracket of a cut-out switch for polymer insulator, which is fastened by a structure that facilitates assembly of a fastening member for assembly of a switch and a structure that is easy to be assembled, and reduces manufacturing costs by simplifying a component.

In general, the cut-out switch is attached to the primary side of the transformer so that in the event of overvoltage and overcurrent, the high voltage power is applied to protect the transformer or to cut off the wiring path by melting the fuse. It is well known as an electric device that can be opened and closed conveniently.

This cut-out switch is fixed to the electric pole by using the mounting bracket 9, as shown in Figure 1, between one end of the mounting bracket 9 and the fastener 5 in which the insulator 1 of the insulator is assembled in the center. As the insulating reinforcing material between the earth, the soil resistant insulator 10 is assembled and attached, and on both sides of the insulator 1, upper and lower connection brackets 3 and 4 are assembled with a plurality of fastening members, so that the power supply terminal 6 and the load are assembled. The side terminal 7 is assembled, and a fuse holder 8 is provided between these terminals.

A lead wire from the power line is connected to the power supply terminal 6, and a lead wire connected to the columnar transformer is connected to the load side terminal 7 to be in electrical contact with the fuse holder 8.

The cut-out switch protects the transformer by shorting the internal fuse of the fuse holder 8 in the event of overvoltage and overcurrent, and rotates the fuse holder 8 or disconnects the internal fuse during maintenance or inspection. By cutting off the power supplied to the power supply side terminal 6, the technical details are well known to those skilled in the art and various detailed descriptions are omitted.

Among the elements constituting the cut-out switch, the connection bracket of the insulator 1 is in the scope of the present invention.

The insulator 1 of the cut-out switch has an insulated housing 1a of a shed structure that increases the leakage distance and the flashover distance by using a polymer material recently, and provides mechanical stress to the inside of the insulated housing. The core rod 2 of glass fiber reinforced plastic (FRP) material and the upper connection bracket (3) and the lower connection bracket (4) connected to each end of the core rod by a die-compression method are known. ought.

In order to manufacture the polymer insulator 1, the upper and lower connection brackets 3 and 4 are inserted into both ends of the FRP core rod 2, and the polymer insulator 1 is pressed and fixed at a predetermined pressure by a die. It is manufactured by inserting the polymer rubber compound into the mold at high pressure and molding the insulating housing 1a.

However, the polymer insulator 1 of the conventional cut-out switch has the upper and lower connection brackets 3 and 4 protrudingly formed in the same direction as the longitudinal direction of the insulating housing 1a, as shown in detail in FIG. 2. In order to connect the power supply side terminal 6 and the load side terminal 7 which are connected to the fuse holder 8 constituting the cutout switch, a plurality of fastening members are required.

That is, it is necessary to switch in the orthogonal direction for connection connection of the upper and lower connection brackets 3 and 4, so as to assemble a separate connection terminal 11, a plurality of spring washers 12 for reliable connection and fixing And fixing nut 13 are constituted by screw assembly.

Of course, before using the polymer rubber, the insulator 1 of the conventional cut-out switch is connected to the upper and lower brackets of the plate-like bracket structure at right angles to connect the terminals 6 and 7 to both ends of the insulator of magnetic material. (3,4) and the fastener (5) in the center were manufactured by integrally firing, but these insulators are heavy materials, difficult to handle, expensive to manufacture, and in the case of breakdown during use, magnetic material insulators are scattered. Rather, it was pointed out as a factor of serious safety accidents.

In addition, the use of materials without thermal deformation of the upper and lower connection brackets 3 and 4 and the fastener 5 due to the plasticity of the magnetic material and the long manufacturing time due to the plasticity have a disadvantage of poor productivity. By implementing the upper and lower connection brackets 3, 4, there was no practicality as a disadvantage of insufficient strength.

The present invention is to reduce the cost of the cut-out switch as well as the assembly workability and mass production by improving the structure of the connection bracket of the polymer insulator constituting the conventional cut-out switch.

That is, the polymer insulator of the present invention is manufactured by casting the upper and lower connection brackets to be connected to the terminals connected to the fuse holders of the cut-out switch by casting, and then manufactured by forming the core rods and assembling and molding the polymer insulation housing. The purpose is to reduce the cost as well as excellent assembly workability by simplifying the fastening member for.

Hereinafter, the configuration of the present invention based on the accompanying drawings.

3 is a perspective view of the polymer insulator after the present invention is applied, FIG. 4 is an exploded perspective view, and FIG. 5 is a cross-sectional view of the polymer insulator to which the present invention is applied.

In the description of the present invention, the numbering of the members constituting the cutout switch other than the constituent members constituting the polymer insulator will be described with the same member numbers with reference to FIGS. 1 and 2.

That is, the polymer insulator 100 to which the present invention is applied has an insulating housing 110 integrally having a plurality of shades 120 formed of a polymer rubber material as in the conventional configuration, and impart mechanical stress to the inside of the insulating housing. Including the components of the core rod (200) of the glass fiber reinforced plastic (FRP) material for the upper and lower connection brackets of the present invention manufactured by casting molding on both ends of the core rod (200) Is composed.

The upper and lower connection brackets 300 and 400 may have cylindrical pipes 310 and 410 coupled to end portions of the mandrel 200 by casting, and the power supply side terminal 6 or the load side terminal of the cutout switch described in FIG. The plate-shaped coupling plates 320 and 420 to be coupled to 7) are integrally formed with rod-shaped connecting rods 330 and 430 bent at right angles.

Each of the upper and lower connection brackets 300 and 400 is fitted into the coupling grooves 311 and 411 of the cylindrical pipes 310 and 410 at both ends of the core rod 200, and is assembled and connected to the outer circumferential surface by a conventional die in a crimping manner.

In this way, after the upper and lower connection brackets 300 and 400 are connected to both ends of the core rod 200, the insulating housing 110 is molded in a conventional mold to manufacture the polymer insulator 100.

At this time, the cylindrical tube (310,410) has a structure formed in a stepped shape with a narrow outer diameter toward the connecting rod (330,430) side as shown in the enlarged view of Figure 6 (molding thickness coated on the outer peripheral surface of the core rod 200 ( The forming thickness t2 of the end surface of the insulating housing 110 is larger than that of t1), and the dielectric breakdown can be prevented by reliable sealing.

In the drawings, reference numeral 500 denotes a fastener fastened to the mounting bracket 9 fixed to the electric pole as described with reference to FIG. 1.

The polymer insulator 100 of the present invention is bent at right angles without the need for a separate redirection connecting member for connecting to the power supply side terminal 6 and the load side terminal 7 to form a cutout switch as in the prior art. The plate-shaped coupling plates 320 and 420 integrally formed at the ends of the connecting rods 330 and 430 may be fastened through fastening members such as bolts and nuts.

In addition, the connecting rods 330 and 430 integrally formed on the coupling plates 320 and 420 are cylindrical rods, so that sufficient strength can be ensured and can withstand external forces, and an unstable element such as loosening by using a plurality of connecting members as in the prior art is excluded. .

The present invention as described above has the effect of reducing the manufacturing cost by simplifying the constituent members in constructing the cut-out switch, as well as the excellent assembly and workability, and the solid structure even after assembly. have.

Claims (2)

The upper and lower connection brackets connected to the power supply terminal and the load terminal connected to the fuse holder are press-bonded to the upper and lower parts of the FRP mandrel, and the polymer insulation housing is formed by wrapping the joints with the mandrel and the mandrel. In the insulator for the cutout switch, The upper and lower connection brackets are integrally formed by a rod-shaped connecting rod in which a cylindrical tube coupled to the end of the core rod and a plate-shaped coupling plate coupled to the power supply side terminal or the load side terminal are bent at right angles by casting. Connection bracket of polymer insulator for cutout switch to assume. The method of claim 1, The cylindrical tube is connected to the polymer insulator of the cut-out switch insulator, characterized in that the outer peripheral surface is formed in a stepped phase to have a close contact with the end portion.

Images