JP4152569B2 - Rotary disconnector for high-voltage power transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotary disconnector for high-voltage power transmission (usually referred to as LS) provided so that a transmission line can be manually opened and closed at a substation that transmits high-voltage power such as 66 KV. The present invention relates to a technology for a rotary support structure of a rotary contact, in which the rotary support structure can be disassembled and inspected easily and quickly without disassembling the entire rotary disconnector, and can be disassembled and inspected even in a live line state.
[0002]
[Prior art]
As shown in FIG. 4, the conventional rotary support structure of the rotary disconnector for high-voltage power transmission has a support shaft 28 vertically suspended via an operation arm mounting portion 27 at the lower portion of the rotary spindle 20 with the rotary contact mounted horizontally above. The support shaft is passed through a rotary base 23 attached to a support base 22 having a height of about 2.5 m from the ground, a thrust bearing 21 is provided above the rotary base, and a bearing 24 is provided below the rotary base. The nut 25 is attached to the support shaft 28, and the cap 26 is screwed to the outer periphery of the lower end of the rotary base 23 so as to accommodate the bearing 24 and the nut 25.
This rotary disconnector for high-voltage power transmission may interfere with normal operation due to scratches, rust, etc. on the thrust bearing 21 and the bearing 24. Therefore, the rotation support structure is periodically installed at a rate of about once every several years. Parts are overhauled.
In the conventional rotary support structure, in order to perform this periodic overhaul and inspection, it is necessary to pull up the rotary spindle 20 from the rotary base 23 from the support base 22 of about 2.5 m. Therefore, a simple crane using a winch on the support base 22 Had to be installed. In the overhaul inspection work, the support shaft 28 and the rotary main shaft 20 are pulled out from the rotary base 23, and the thrust bearing 21, the bearing 24, the nut 25, and the cap 26 are removed and inspected.
This work is dangerous because it is a high place work and the rotor is moved, and it is done with power transmission stopped, so temporary work with a power cable for movement is required, and a simple crane is installed and the work is done at a scaffold high place. It was a dangerous work that caused a fall accident. For these reasons, the work cost is high.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to solve these conventional problems, can be easily overhauled from the ground without the need for a simple crane scaffold, and the work can be performed safely and quickly in a short time, Moreover, it is an object of the present invention to provide a rotary disconnector for high-voltage power transmission that can be disassembled and inspected in a live line state without stopping power transmission.
[0004]
[Means for Solving the Problems]
The configuration of the present invention that solves this problem is as follows.
1) A rotating contact is rotatably provided in the middle of the high-voltage power transmission path, and provided with a rotating means for rotating the rotating contact by an external operation. The rotating contact is rotated by the rotating means to level the high-voltage power transmission path. In the high-voltage power transmission rotary disconnector that can cut two points,
A support shaft is provided at the lower end of a rotating main shaft of a vertical insulator with a rotating contact at the top and a rotating means at the bottom, and the support shaft penetrates into the central hole of the cylindrical rotating base attached to the support base. A threaded portion is provided on the outer periphery of the lower end of the penetrating support shaft, and a cylindrical body is screwed and attached to the lower hole wall of the central hole of the rotating pedestal at its upper outer periphery, and the support shaft is pivotally supported on the inner upper portion of the cylindrical body A thrust bearing is attached, a locking nut is screwed onto the lower end of the support shaft via a bearing arranged at the lower part of the cylinder, and a cap is screwed to accommodate the bearing and the locking nut at the lower end of the cylinder. It is a rotary disconnector for high-voltage power transmission characterized by wearing.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The rotary support structure of the rotary disconnector for high-voltage power transmission according to the present invention is designed to be waterproof against rainwater and washing jet water. It is preferable to provide a structure that allows air breathing by providing packing or by providing a small hole for draining the submerged water even if it is submerged.
In addition, when the cap, nut, and bearing are removed and disassembled, the insertion length between the rotary base and the rotary spindle is ensured so that the rotary spindle stands stably on the rotary base.
[0006]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view showing the entire high-voltage power transmission rotary disconnector of the embodiment.
FIG. 2 is a longitudinal sectional view showing a rotation support structure of a main part of the embodiment.
FIG. 3 is an exploded perspective view showing a rotation support structure of a main part of the embodiment.
[0007]
In the figure, 1 is a rotating contact, 1a is a movable contact portion at both ends of the same rotating contact, 1b is a relay conductor that supports and energizes the movable contact portions at both ends, and 2 is the center of the rotating contact 1 at the upper end. The attached rotating main shaft, 2a is an electrically insulating main shaft main body, 2b is an insulator insulator supporting shaft attached to the lower part of the main shaft main body 2a, 2c is a bolt for connecting the main shaft main body 2a and the supporting shaft 2b, 2d is An attachment portion 2e of the opening / closing operation arm 2e above the support shaft 2b is an operation arm attached to the top of the rotation support shaft 2b that rotates the rotation main shaft 1 to open / close the power transmission path, and the strings are left and right. The rotation spindle 1 is rotated by the string operation. 2f is a threaded portion of the reduced diameter portion of the lower end of the rotary support shaft 2b, 4 is a cylindrical rotary pedestal that supports the rotary support shaft 2b through the passage, 4a is a central hole, and 4b is a housing for the thrust bearing 5 of the rotary pedestal. Space 4c is a screw portion provided on the inner wall of the accommodating space 4b, 5 is a thrust bearing, 6 is a cylinder, 6a is a fitting space for the thrust bearing 5 of the cylinder, 6b is an upper outer peripheral screw portion of the cylinder 6, 6c Is a lower outer peripheral thread portion of the cylindrical body 6, 7 is a bearing, 8 is a locking nut, 8a is a locking pin of the locking nut, 9 is a cap screwed to the lower portion of the cylindrical body 6, 10 is about 2 m This is a support base using a channel material having a U-shaped cross section constructed at a height. Reference numeral 11 denotes a fixed contact connected to a power transmission path that contacts the movable contact portion 1a, and 12 denotes an insulator insulator that supports the fixed contact.
[0008]
In this embodiment, as shown in FIG. 1, the rotary contact 1 is attached to the upper end of the rotary main shaft 2 and is formed by connecting a movable contact portion 1a, which is a conductor, and a relay conductor 1b. As shown in FIGS. 2 and 3, the support shaft 2 b is coupled to the lower end of the rotation main shaft 2 by a bolt 2 c and integrated, and is inserted into the central hole 4 a of the rotation base 4 mounted on the support base 10. The thrust bearing 5 is inserted into the receiving space 4b below the pedestal, and the cylindrical body 6 is inserted into the insertion space 6a above the thrust bearing 5 from below, and the upper outer peripheral threaded portion 6b of the cylindrical body 6 is set to the rotating base. 4, the thrust bearing 5 is held.
Further, the bearing 7 is inserted below the support shaft 2b, the locking nut 8 is screwed into the threaded portion 2f of the support shaft 2b, and is fixed by the set pin 8a. Thereafter, the cap 9 is inserted so as to cover the lower part of the support shaft 2b, the bearing 7 and the nut 8, and screwed with the lower outer peripheral threaded portion 6c of the cylindrical body 6 to hold the rotational support structure portion of the rotary main shaft 2 in a watertight manner. ing. Thus, the rotation main shaft 2 is rotatably attached. The power transmission path is opened and closed by pulling one of the strings (not shown) attached to both ends of the operation arm 2e in the horizontal direction, rotating the rotary spindle 2 and rotating the rotary contact 1 horizontally. It is. Next, when inspecting and repairing the rotation support portion (inside the thrust bearing 5, the bearing 7 and the rotation base 4 of the support shaft 2b) of the rotary disconnector for high-voltage power transmission according to the embodiment, the support base 10 is about 2.5 m. An operator stands on the ground step below and removes the cap 9, the locking pin 8a, the locking nut 8, the bearing 7, the cylindrical body 6, and the thrust bearing 5 in this order. Since this work is not a work at a high place, a scaffold or a simple crane is not required, and the work can be performed by reaching out from the ground or on a low platform.
Further, during the disassembling work, the support shaft 2b of the rotating spindle 2 remains deeply inserted into the central hole 4a of the rotating pedestal 4, so that the rotating spindle 2 does not fall down and does not need to be pulled up from the rotating pedestal 4 and pulled out. The thrust bearing 5 and the bearing 7 that need to be inspected can be taken out and accurately inspected at hand. Further, the lower space of the rotating pedestal 4 can be inspected and repaired from below. Therefore, the transmission line can be safely inspected and repaired even in a live state.
In addition, installation after inspection and repair can be performed quickly and easily by performing the reverse procedure of disassembly.
[0009]
【The invention's effect】
As described above, according to the present invention, the thrust bearing and the structure in which the bearing is disposed below the rotary base can be used to check and repair the rotary support portion of the rotary disconnector for high-voltage power transmission. It can be done easily and quickly from the ground without using it, and it can be inspected and repaired while it is inserted into the rotating pedestal without pulling out the rotating spindle of the rotating contact from the rotating pedestal, so it can be checked safely and lively did.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing an entire rotary disconnector for high-voltage power transmission according to an embodiment.
FIG. 2 is a longitudinal sectional view showing a rotation support structure of a main part of the embodiment.
FIG. 3 is an exploded perspective view showing a rotation support structure of a main part of the embodiment.
FIG. 4 is an exploded perspective view showing a rotation support structure of a conventional rotary disconnector for high-voltage power transmission.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotating contact 1a Movable contact part 1b Relay conductor 2 Rotating main shaft 2a Main shaft main body 2b Support shaft 2c Coupling 2d Mounting part 2e Operation arm 2f Screw part 4 Rotating base 4a Central hole 4b Housing space 4c Screw part 5 Thrust bearing 6 Cylindrical body 6a Insertion space 6b Upper outer peripheral threaded portion 6c Lower outer peripheral threaded portion 7 Bearing 8 Locking nut 8a Stopping pin 9 Cap 10 Support base 11 Fixed contact 12 Insulator

Claims (1)

A rotating contact is rotatably provided in the middle of the high-voltage power transmission path, and provided with rotating means for rotating the rotary contact by an external operation. In the rotary disconnector for high-voltage power transmission that can be cut off,
A support shaft is provided at the lower end of a rotating main shaft of a vertical insulator with a rotating contact at the top and a rotating means at the bottom, and the support shaft penetrates into the central hole of the cylindrical rotating base attached to the support base. A threaded portion is provided on the outer periphery of the lower end of the penetrating support shaft, and a cylindrical body is screwed and attached to the lower hole wall of the central hole of the rotating base at the upper outer periphery, and the support shaft is pivotally supported on the inner upper portion of the cylindrical body. A thrust bearing is attached, and a locking nut is screwed onto the lower end of the support shaft via a bearing disposed at the lower part of the cylinder, and a cap is screwed to accommodate the bearing and the locking nut at the lower end of the cylinder. A rotary disconnector for high-voltage power transmission characterized by wearing.

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