JPH0553060U - Electric wire lateral shake limiting device in steel tower - Google Patents

Abstract

(57) [Summary] [Purpose] The electric wire shake limiting device can be easily attached to a steel tower without increasing the size of the tower. [Structure] A shield member 5 for limiting lateral vibration of an electric wire is attached to a main member 3 of an arm 1 of a power transmission tower 2 via an insulator 4.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a device for preventing an electrical accident caused by a laterally swaying electric wire coming into contact with or abnormally approaching a steel tower.

[0002]

[Prior Art]

 An electric wire lateral vibration limiting device used when an electric wire is stretched by a tension insulator device is one in which a metal rigid material is added to a part or the entire length of the jumper wire (for example, JP 60-19486). No.), and a jumper suspension insulator string (for example, Jitsuko Sho 58-348) that suspends the middle of the jumper line on a steel tower arm. The electric wire lateral vibration limiting device used when suspending electric wires with a suspension insulator device has a structure in which a weight is attached to the jumper wire gripping portion located at the lower end of the suspension insulator device, the suspension insulator device. There are a series of insulators arranged in a V-shape (for example, Japanese Utility Model Publication No. 52-4552), and a system in which the lateral shake movable base point is lowered in order to increase the allowable lateral shake amount.

[0003]

[Problems to be solved by the device]

 Since the conventional wire lateral vibration limiting device is generally applied to the location of the wires and jumper wires that are far away from the steel tower, there is a possibility that the scaffolding is bad and the installation work is inefficient and dangerous. In addition, the V-shaped arrangement of suspension insulators has a long tower arm length, and the one with a lower lateral shake movable base point raises the tower, resulting in higher tower construction costs and underground line compensation costs. There was an inconvenience that the price rose.

The present invention has been made in view of the above points, and an object thereof is to provide an electric wire lateral vibration limiting device that can be easily installed without increasing the size of a steel tower.

[0005]

[Means and Actions for Solving the Problems]

 In the electric wire lateral vibration limiting device of the present invention, the lateral vibration amount of the electric wire is restricted by providing a shielding material to the tower through the insulator. It goes without saying that the distance between the steel tower and the shielding material in this case is such that no electrical accident occurs even if the electric wire approaches the steel tower or comes into contact with the shielding material.

In the transmission tower, the shielding material is attached to a plurality of insulators arranged on the lower surface of the arm or on both sides of the arm at intervals in the transmission tower. If the steel tower is a suspended steel tower, shielding materials are installed diagonally on both sides of the arm via insulators. Further, both sides of the upper and lower arms of the suspension tower or the transmission tower, or both sides of the arm and both sides of the tower main body may be connected by a pair of insulators attached to both ends of the shielding material. .. As described above, the electric wire lateral vibration limiting device of the present invention is to be installed on the tower because the shielding material is attached to the tower through the insulator.

An insulating material, a metal material, or the like is used as the shielding material. Further, if a spring is provided between the steel tower and the insulator or between the insulator and the shield, the impact caused by the contact between the electric wire and the shield can be mitigated.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 is an arm of a power transmission tower 2, and a plurality of insulators 4 are attached to the lower surfaces of the main members 3 and 3 on both sides of the lower stage with mounting brackets at the lower ends of these insulators. An insulating material, such as a fiber-reinforced plastic or a vinyl chloride plate material, is attached to the shield material 5 in a grid pattern. The distance between the main material 3 and the shielding material 5 is set to a range that can withstand the commercial frequency voltage even if the jumper wire comes into contact with the shielding material 5.

FIG. 3 shows an insulator 4 provided with a mounting bracket 6. The mounting bracket 6 is inserted into an upper end portion of the insulator 4 and is attached to the insulator 4 with nuts 7 and 7, and a bolt 8 is inserted into this bolt. The shaft portion 9 includes bolts 8 and claw portions 10 and 10 which are inserted into the bolt 8 and the shaft portion 9 and hooked on both ends of the chevron-shaped main member 3, and nuts 7 and 11 for fastening the claw portions 10 and 10. A bolt 12, a nut 13, a washer 14 and the like for mounting the shielding material 5 are provided on the lower end projecting portion of the insulator 4.

In FIG. 4, a jumper wire 17 connecting a retracting clamp 15 of a tension insulator device 16 (only one of the tension insulator devices is shown) on both sides of the arm 1 comes into contact with the shielding member 5 due to lateral deflection. Indicates the state. Since the contact position of the jumper wire 17 with the shield material 5 is not constant, the length of the shield material 5 in the arm axis direction should be long enough so that the jumper wire 17 does not come into contact with the arm or abnormally approach. There is. Therefore, an electric accident due to the lateral shake of the jumper wire 15 does not occur.

5 and 6, a plurality of insulators 19 are attached to the side portions of the main members 3 and 3 on both sides of the lower stage of the arm 1 at intervals with a mounting bracket 23 as shown in FIG. 7, and these insulators are attached. A shielding member 25, which is a combination of aluminum rods 24 in a grid pattern, is attached to the lower surface of the. The mounting metal fitting 23 is composed of an L-shaped metal fitting 20 mounted on the upper end of the insulator 19, a bolt 21 fitted to the main material 3, and a nut 22 screwed to the bolt 21 to fix the L-shaped metal fitting 20 to the main material 3. Is made.

As shown in FIGS. 8 and 9, the upper and lower arms 1, 1 of the suspension tower 18 are connected by a pair of wire lateral shake limiting devices 26, 26, and the lower arm 1 is connected to the lower arm 1. The steel tower main body 27 is connected by a pair of electric wire lateral shake limiting devices 26 ', 26'.

The wire lateral vibration limiting device 26 includes a lower main material 28 of the upper arm 1 and an obliquely arranged main material 29 of the lower arm 1, and an electric wire lateral vibration limiting device 26 '. Is composed of a lower main member 30 ′ of the lower arm 1 and a vertical main member 31 of the tower main body 27, and a mounting plate 32 as shown in FIG. 10, a bolt 33 and a nut 34 fitted to the main member, respectively. The insulator 37 is attached via the mounting metal fitting 35, and the steel rod 38 as the shielding material is connected to the opposed insulators 37, 37 via the shielding material mounting metal fittings 39, 39.

The electric wire lateral vibration limiting device 26 ′ is further supported by the suspension insulator device 41 by interposing a coiled spring 40 between the insulator 37 on the side of the tower main body 31 and the mounting bracket 35. The impact caused by the contact between the electric wire 44 and the steel rod 38 is mitigated. Further, a protective rod 42 for protecting the insulator 37 from the suspension insulator device 41 is attached to the upper shielding member attachment fitting 39 of the electric wire shake deflection device 26, 26 '. Although the shielding material in this embodiment is the steel rod 39, it may be a steel wire or a steel plate. In FIG. 10, the reference numeral 36 of the mounting plate 32 is a hole for mounting the insulator 37 or the mounting seat 43 of the spring 40.

An electric wire lateral vibration limiting device 48 shown in FIGS. 11 and 12 has an L-shaped metal fitting 49 and a main member 28 fitted between the main members 28, 28 on both lower stages of the arm 1 of the suspension tower 18. The insulator 53 is attached to the insulator 53 with the mounting bracket 52 composed of the nut 50 and the nut 51, and the aluminum shield 54 for limiting the lateral deflection of the electric wire 44 gripped by the suspension insulator device 41 is attached to the lower end of the insulator 53 in an obliquely downward direction. It is installed.

The electric wire lateral vibration limiting device 56 shown in FIG. 13 and FIG. 14 includes a shield member 54 and an electric wire between the insulator 53 and the shield member 54, which are mounted on the main member 28 by the mounting member 23 described in FIG. A spring 57 is interposed to reduce the impact caused by the contact with 44.

[0017]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects.

Since the shielding material for limiting the lateral shake of the electric wire is attached to the steel tower through the insulator, the electric wire lateral shake limiting device can be easily attached on the steel tower. In addition, it does not require a large-sized steel tower for its installation, and it does not require modification of existing overhead lines or the structure of the steel tower, so it can be easily applied to existing steel towers.

Since the spring is interposed between the insulator to which the shielding material is attached and the steel tower or between the shielding material and the insulator, the impact due to the contact between the electric wire and the shielding material can be mitigated.

[Brief description of drawings]

FIG. 1 is a side view of a first embodiment of the present invention.

FIG. 2 is a bottom view of the embodiment.

FIG. 3 is a front view of an insulator including a mounting bracket in the embodiment.

FIG. 4 is an explanatory diagram showing a method of using the same embodiment.

FIG. 5 is a side view of a second embodiment of the present invention.

FIG. 6 is a bottom view of the example.

FIG. 7 is a front view of an insulator provided with a mounting bracket in the embodiment.

FIG. 8 is a side view of a third embodiment of the present invention.

FIG. 9 is a schematic front view of the embodiment.

FIG. 10 is a fitting for attaching an insulator to the main material in the same example.

FIG. 11 is a side view of a fourth embodiment of the present invention.

FIG. 12 is a schematic front view of the embodiment.

FIG. 13 is a side view of a fifth embodiment of the present invention.

FIG. 14 is a schematic front view of the embodiment.

[Explanation of symbols]

 1 Arm 2 Power Transmission Tower 4 Insulator 5 Shielding Material 18 Suspended Tower 19 Insulator 25 Shielding Material 27 Tower Main Body 37 Insulator 38 Shielding Material 40 Spring 53 Insulator 54 Shielding Material 57 Spring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Houka Nomura 13-1 Isojima Minamimachi, Hirakata-shi, Osaka Japan Cat. Ltd.

Claims (9)

[Scope of utility model registration request] 1. An electric wire lateral vibration limiting device for a steel tower, wherein a shielding material for restricting lateral vibration of the electric wire is provided on the steel tower through an insulator. 2. The electric wire runout limiting device in a steel tower according to claim 1, wherein a shield member is attached to a plurality of insulators arranged at intervals on the lower surface of the arm of the power transmission tower. 3. The electric wire lateral deflection limiting device in a steel tower according to claim 1, wherein a shield member is attached to a plurality of insulators arranged on both sides of the arm of the power transmission tower at intervals. 4. A pair of insulators attached to both ends of the shield member on both sides of the upper and lower arms of the steel tower, respectively.
An electric wire lateral shake limiting device in the steel tower described. 5. The electric wire lateral deflection limiting device in a steel tower according to claim 1, wherein both sides of the arm of the steel tower and both sides of the steel tower main body are connected by a pair of insulators attached to both ends of the shielding material. 6. The electric wire lateral deflection limiting device in a steel tower according to claim 1, wherein shield members are obliquely provided on both sides of the arm of the suspended steel tower through insulators. 7. The shield material is an insulating material as claimed in claim 1, 2.
An electric wire lateral vibration limiting device for a steel tower according to 3, 4, 5 or 6. 8. The shield material is a metal material as claimed in claim 1, 2.
An electric wire lateral vibration limiting device for a steel tower according to 3, 4, 5 or 6. 9. The electric wire lateral vibration limiting device for a steel tower according to claim 1, wherein a spring is interposed between the steel tower and the insulator or between the insulator and the shielding material.