JP2011223683A - Multi-conductor transmission line spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-conductor transmission line spacer in which a necessity of welding is eliminated and reduction in the number of components and in weight can be achieved by a simple structure, and an electric wire can be rightly held while a support object or worker burden is reduced.SOLUTION: A multi-conductor transmission line spacer is formed in a frame body in which a partition 14 connected to a frame body side of a rectangle (polygon) and bases 13A-13D opening a center hole 13b toward the center of the rectangle while turning a cylindrical surface 13a which is disposed in each corner of the rectangle, is made cylindrical and has a thick outer circumference X, toward the outside are integrally formed with a lightweight material. A lightweight compound frame body 10 by internal chill casting is provided which is internally chilled together with the frame body and formed integrally by installing, in the casting mold of the frame body, chambers 12A-12D comprised of a high-strength and wearing-resistant material opening a hole 12 for mounting a clamp while extending from the circumferential surface 12a outside of the bases 13A-13D in a bottomed cylindrical shape and disposing a bottomed surface 12a outside.

Description

  The present invention relates to a spacer for a multi-conductor power transmission line, and more specifically, for a multi-conductor power transmission line that holds a plurality of wires of a multi-conductor power transmission line stretched between supports such as a power transmission tower at a specified interval. It relates to a spacer.

  Conventionally, multi-conductor transmission line spacers are installed on a surface perpendicular to the wire diameter direction of a multi-conductor transmission line that is stretched between multiple supports such as a transmission tower, and the same number of spacers are arranged at the position of each electric wire. And chambers that are welded to each chamber and connected to each other to form a polygonal frame. The same number of clamps are attached to the plurality of chambers to hold each wire and hold it at a specified interval. Many spacers for multi-conductor power transmission lines are used (see, for example, Patent Document 1 and Patent Document 2 below).

  An embodiment of a multiconductor transmission line spacer having the above-described structure will be described with reference to FIGS. FIG. 3 is a configuration diagram showing an embodiment of a conventional multiconductor transmission line spacer. FIG. 4 is a diagram showing a configuration other than the clamps 20A to 20D shown in FIG. FIG. 5 is an enlarged view showing details of a portion A shown in FIG.

As shown in FIG. 3, one embodiment of a conventional spacer for a multi-conductor power transmission line is such that, when the overhead power transmission line holds, for example, the spacing between the four conductor power transmission lines at a constant distance, The four low conductor cylindrical chambers 30A-D, which are installed on a plane perpendicular to the direction and arranged at one position of each electric wire of the four-conductor transmission line, are connected to each other by welding to the chambers 30A-D. A rectangular spacing body 40, and four clamps 20A to D which are attached to the four chambers 30A to 30D and hold the electric wires 1 at the four positions and hold them at a prescribed interval. Configured.
Such conventional multi-conductor transmission line spacers are not shown, but are mounted in a plurality (a plurality at intervals of 20 to 60 m) on a transmission line extending between supports such as a transmission tower.

  In addition, as shown in FIG. 4, this conventional four-conductor transmission line spacer is formed as a rectangular frame by welding a round steel material, which is a spacing member 40, to the side surfaces of the bottomed cylindrical chambers 30A to 30D. Has been. That is, the interval body 40 and the bottomed cylindrical chambers 30 </ b> A to 30 </ b> D made of steel parts formed by bending or forging are welded to each other to form an integral rectangular four-conductor spacer frame. In FIGS. 3 and 4, a square spacer for a four-conductor transmission line is formed. However, for example, as shown in Patent Document 2 below, it can be provided for an eight-conductor transmission line or a six-conductor transmission line. In this case, it is formed in a regular octagonal or regular hexagonal frame.

  Here, as shown in FIG. 4, the chambers 30 </ b> A to 30 </ b> D are formed in a bottomed cylindrical shape, and the bottom surface 30 a is disposed outside the polygon, and the clamps 20 </ b> A to 20 </ b> A to the bottom surface 30 a are arranged. A hole 30b (in particular, refer to the chamber 30A) for attaching D (see FIG. 3) is opened. As shown in FIG. 5, the clamp 20 has a shaft-like terminal 22 on the base side to be inserted into the hole 30b of the lower surface 30a of the chamber 30, and the terminal 22 is inserted into the hole 30b. The coil spring 24 and the flat washer 26 are sequentially attached from the inner side of the cylindrical chamber 30 to adjust the tightening amount of the grooved nut 28, and then the split pin 29 is attached, whereby the four-conductor feed shown in FIG. The assembly as a wire spacer is completed.

JP 2001-173626 A (see FIG. 2) JP 2009-055659 A (see FIGS. 1 and 4)

  However, the conventional multi-conductor transmission line spacer is a steel frame formed by welding the interval body 40 formed by bending the round steel shown in FIG. 4 and the steel chambers 30A to 30D formed by forging. However, its mass is heavy, and if multiple places are installed at a predetermined interval on an overhead power transmission line between supports such as steel towers, it will become a burden as a load at the support point, and it will also work in the spacer installation work at the height of the support There was a problem that it would be a burden on the user. Also, if the frame, which is the main part of the spacer, is heavy, in addition to the burden on the support (steel tower) and the burden on the operator, to the connecting part of the spacer itself that is generated by the inertial force due to the mass of the frame when the wire is shaken. There was a problem that it would also be a burden of.

  In addition, the conventional multi-conductor power transmission line spacer has a structure in which the above-described spacing body 40 and the chambers 30A to 30D are connected by welding, so that the number of parts and the number of welding points at the time of assembly increase. When there is a defect or the like, after being attached to the electric wire, the gap body 40 and the chambers 30A to 30D are detached due to corrosion or a change with time, and there is a possibility that the electric wires may not be held at a correct specified interval. there were.

  The present invention has been made in view of the above points, and its purpose is to reduce the number of parts and weight at the same time by eliminating the need for welding with a simple structure, reducing the burden on the support and the operator. An object of the present invention is to provide a multi-conductor transmission line spacer that can hold electric wires correctly at specified intervals.

  The present invention has been made to solve the above-described problems, and is installed on a surface perpendicular to the wire span direction of a multiconductor transmission line that is stretched between supports such as a transmission tower, A plurality of chambers arranged in proximity to each other, and a spacing member that is welded between the chambers to connect each other to form a polygonal frame, and is attached to each of a plurality of chambers. A spacer for a multi-conductor power transmission line provided with a clamp that holds an electric wire and holds it at a specified interval, and is a cylindrical body that is disposed at each corner of the polygon and is spaced in a polygon. A frame body is integrally formed of a lightweight material with a base portion having a cylindrical surface having an outer periphery facing outward and a center hole opened toward the center of the polygon. , Extending from the cylindrical surface outside the base part into a low-cylindrical shape, High strength is opened a hole for attaching the lamp, by installing a chamber made of a material of abrasion resistance, providing a lightweight composite frame body by insert casting to form integrally cast Gurung cast with the frame.

  Here, the clamp has a rod-shaped terminal extending to one end, and this terminal is inserted into the center hole of the base part from the hole of the chamber, and a coil spring, a plain washer, and a nut are attached from the inner tip. It is preferable that it is attached in pressure contact with the chamber. Further, it is preferable that the frame body is made of an aluminum alloy material as a lightweight material, and the chamber is made of an aluminum-based composite material that is not insulating as a high-strength, wear-resistant material.

  As described above, according to the multi-conductor transmission line spacer according to the present invention, the distance body and the base part, which are the main parts of the spacer, can be reduced in weight by the frame body formed integrally with the lightweight material, so the burden on the support and the work In addition to the burden on the person, the burden on the spacer itself caused by the inertial force due to the mass of the frame body when the electric wire is shaken can be reduced. Moreover, since only the chamber can be formed into a lightweight composite frame body in a state in which high strength and wear resistance are maintained by cast-off casting, durability after attachment is improved.

  Further, according to the multi-conductor transmission line spacer according to the present invention, since the interval body, the base portion, and the chamber are formed as a lightweight composite material frame integrally joined, the number of parts is reduced and welding is performed. Since it is not necessary, there is no welding failure, it is durable against corrosion and changes over time, and each electric wire can be held correctly at a specified interval. Moreover, the spacer for multi-conductor power transmission lines can be obtained only by attaching a clamp to this lightweight composite material frame, and it becomes possible to reduce manufacturing man-hours and manufacturing costs sufficiently.

The block diagram which shows one Embodiment of the spacer for multiconductor power transmission lines by this invention. The figure which shows the structure of the lightweight composite material frame shown in FIG. The block diagram which shows one Embodiment of the spacer for conventional multiconductor power transmission lines. The figure which shows structures other than the clamp shown in FIG. The enlarged view which shows the detail of the A section shown in FIG.

  Next, an embodiment of a multiconductor transmission line spacer according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a configuration diagram showing an embodiment of a multiconductor transmission line spacer according to the present invention. 2 is a diagram showing the configuration of the lightweight composite material frame 10 shown in FIG. 1, FIG. 2 (a) is a front view of the frame 10, and FIG. 2 (b) is a side view of the frame 10. FIG. 2 (c) shows a front view of the hole 12b of each of the chambers 12A to 12D.

  As shown in FIG. 1, an embodiment of the spacer for a multiconductor transmission line according to the present invention is similar to the prior art shown in FIG. The spacer structure is held at intervals, and is installed on a surface perpendicular to the span of a multiconductor transmission line 1 (transmission line) that is stretched between four supports such as a transmission tower. Four lower and lower cylindrical chambers 12A to 12D arranged in the vicinity of each electric wire 1 position of the electric wires, and a spacing member 14 that connects the chambers 12A to 12D to each other to form a rectangular frame. The clamps 20A to 20D are attached to the four chambers 12A to 12D and hold the electric wires 1 at the four positions and hold them at a specified interval.

  Moreover, unlike the prior art shown in FIG. 4, one Embodiment of the spacer for multiconductor power transmission lines by this invention is not the structure which welded the chambers 12A-D and the space | interval body 14, but shows it to Fig.2 (a). In this way, a frame formed by integrally forming a spacing member 14 connected in a polygonal (square) shape and base portions 13A to 13D arranged at each corner of the polygon by a lightweight aluminum alloy material. The casting mold of this frame body is provided with chambers 12A to 12D made of non-insulating aluminum base composite material having high strength and excellent wear resistance, and cast together with the frame body so as to be integrally formed. A lightweight composite frame 10 is provided by round casting.

  That is, in this embodiment, in order to reduce the weight of the multiconductor power transmission line spacer, the main body spacing member 14 and the base parts 13A to 13D are formed of a lightweight material of aluminum alloy casting. The chambers 12A to 12D, which require the strength and wear resistance of the frame, are formed of a non-insulating aluminum-based composite material having high strength and excellent wear resistance, and this non-insulating aluminum-based composite material part is cast with an aluminum alloy. Thus, it is formed integrally with a lightweight composite frame 10 that is lightweight, has high strength, and wear resistance.

  Here, as shown in FIG. 2, the lightweight composite material frame 10 is arranged at intervals 14 connecting the sides of the rectangular frame, and the cylindrical shape shown in FIG. The base portion 13A-D having the cylindrical surface 13a having the thick outer periphery X facing outward and the center hole 13b opened toward the center of the square is integrally formed of a lightweight aluminum alloy material. It has a frame. In addition, the lightweight composite material frame 10 extends from the cylindrical surface 13a outside the base portions 13A to 13D of the lightweight frame to a low-cylindrical shape, and the low-side surface 12a is disposed on the outside to clamp 20 (FIG. The chambers 12A to D made of a non-insulating aluminum base composite material having a high strength and wear resistance with a hole 12b for attaching the base member 12 are cast together with the spacing member 14 and the frame of the base portions 13A to 13D. It is integrally formed.

  Specifically, when forming parts made of different materials of the gap body 14 and the base parts 13A to 13D and the chambers 12A to 12D by cast-in casting, first, an aluminum base that is not insulating is used. A plurality of chambers 12A to 12D made of a composite material are provided. The chambers 12A to 12D are installed in a casting mold that integrally forms the frame 14 and the base portions 13A to 13D, and a molten aluminum alloy material is poured into the casting mold and cast. To form.

  At this time, the chambers 12A to 12D are installed so as to be in contact with the cylindrical surface 13a outside the base portions 13A to 13D in the casting mold, so that they are joined (fused) with the molten aluminum alloy material and formed integrally. . Further, the base portions 13A to 13D have a thick outer periphery X shown in FIG. 2 (a) in order to sufficiently join the chambers 12A to 12D to the melted aluminum alloy material. It is formed with a sufficient thickness in consideration of the hot water position. The base portions 13A to 13D may be eliminated at the time of finishing the product. However, as shown in FIG. 2A, the base portions 13A to 13D are symmetric with respect to four corners (four corners) avoiding the labor (man-hour). Thus, the cylindrical surface 13a is arranged from the center toward the outside, and the center hole 13b is opened.

  In the chambers 12A to 12D, the terminal 22 formed in an axial shape on the base side of the clamp 20 is inserted into the hole 12b in the same manner as the prior art shown in FIG. The flat washer 26 is sequentially attached and the tightening amount of the grooved nut 28 is adjusted, and then the split pin 29 is attached to complete the assembly as a four-conductor transmission line spacer.

  Here, the clamp 20 inserts a rod-shaped terminal 22 extending to one end from the hole 12b of the chambers 12A to 12D into the center hole 13b of the base portions 13A to 13D, and the coil spring 24 and the plain washer 26 from the inner tip. By attaching the nut 28, the terminal 22 is pulled toward the center of the square by the urging of the coil spring 24, so that the chambers 12A to 12D are attached in pressure contact with each other.

  According to one embodiment of the spacer for a multi-conductor power transmission line of the present invention having such a configuration, the spacer 14 and the base portions 13A to 13D, which are main parts of the spacer, can be formed of an aluminum alloy to reduce the weight. In addition to the burden on the support and the burden on the operator, the burden on the spacer itself caused by the inertial force due to the mass of the frame body when the electric wire is shaken can be reduced. Moreover, since the lightweight composite material frame 10 is formed in a state in which only the chambers 12A to 12D retain high strength and wear resistance by cast-off casting, durability after attachment is also improved.

  Moreover, according to one embodiment of the spacer for multi-conductor power transmission lines according to the present invention, the spacing member 14, the base portions 13A to 13D, and the chambers 12A to 12D are formed as a lightweight composite material frame 10 that is integrally joined. Therefore, since the number of parts is reduced and welding is not required, there is no welding failure, durability against corrosion and changes in diameter, and each electric wire can be correctly held at a specified interval. That is, a spacer for a multi-conductor power transmission line can be obtained simply by attaching the clamps 20A to D to the lightweight composite material frame 10 that retains the high strength and wear resistance, and the manufacturing man-hour and the manufacturing cost are sufficiently reduced. It becomes possible.

As mentioned above, although embodiment of the spacer for multiconductor transmission lines by this invention was described in detail, this invention is not limited to embodiment mentioned above, It can change in the range which does not deviate from the summary.
For example, the embodiment of the spacer for a four-conductor power transmission line has been specifically described. However, the embodiment is not limited to this, and is for an eight-conductor power transmission line (see Patent Document 2 below) or for a six-conductor power transmission line. It is also possible to employ it for multi-conductor transmission lines.

1 Electric wire (4-conductor transmission line)
DESCRIPTION OF SYMBOLS 10 Light-weight composite material frame 12A-D chamber 12a Low surface 12b Hole 13 Base part 13a Cylindrical surface 13b Center hole 14 Spacing body 20A-D Clamp 22 Terminal 24 Coil spring

Claims (3)

A chamber that is installed on a surface perpendicular to the wire diameter direction of a multiconductor transmission line that is stretched between supports such as a power transmission tower and is arranged in the same number in the vicinity of each wire, and each chamber And a gap body that is welded between them to form a polygonal frame, and is provided with a clamp that is attached to each of the plurality of chambers and holds each electric wire and holds it at a predetermined interval. In multi-conductor transmission line spacers,
The center hole is opened toward the center of the polygon with the interval body connected to the polygon and the cylindrical surface arranged at each corner of the polygon and having a thick outer periphery facing outward. A base body is integrally formed of a lightweight material, and a frame body is integrally formed. The cast body of this frame body extends from a cylindrical surface outside the base portion to a low-cylindrical shape, and the low-side surface is outside. A lightweight composite frame made by cast-off casting formed integrally with the frame by installing a chamber made of a high-strength, wear-resistant material with a hole for mounting the clamp placed on the frame A spacer for a multi-conductor power transmission line, characterized by comprising: In the spacer for multiconductor power transmission lines according to claim 1,
The clamp has a rod-like terminal extending to one end. The terminal is inserted into the center hole of the base portion from the hole of the chamber, and a coil spring, a plain washer, and a nut are attached from the inner tip. A spacer for a multiconductor power transmission line, wherein the spacer is attached in pressure contact with the chamber. In the spacer for multi-conductor power transmission lines according to claim 1 or 2,
A spacer for a multi-conductor power transmission line, wherein the frame body is made of an aluminum alloy material as a lightweight material, and the chamber is made of an aluminum-based composite material that is not insulating as a high-strength, wear-resistant material.

Images