JPH04135194U - Archhorn flash indicator - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a flash indicator for an arc horn that can be used repeatedly, has a reliable indicator operation during a flash fault, and can easily confirm the presence or absence of arc discharge. [Structure] A base end of a spring member 2 is connected to a fixing member 1 fixed to an arc horn 6, and an indicator member 3 made of a shape memory alloy is attached to the tip of the spring member 2. The indicating member 3 grips and tightly contacts the arcing horn 6 at room temperature, releases the arcing horn 5 upon receiving heat from flashing, and is separated from the arcing horn 5 by the action of the spring member 2. A highly visible color display 4 is provided on the inner surface of the marking member 3. Therefore, this color display 4 appears only when flashing, indicating flashing.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is designed to prevent arcing between arcing horns when a lightning strike or reverse flash fault occurs on a power transmission line. When a flash discharge phenomenon occurs, it is displayed to make it easier to find the flash fault location. Regarding Kuhorn's flash indicator, the visibility of the indicator is improved by using shape memory alloy. Regarding the flash indicator.

0002

[Conventional technology]

Arc horns cause flashovers when shock voltage is applied due to lightning strikes. They are installed to protect equipment such as power transmission lines and insulators. So If an arc discharge occurs between the arc horns due to a lightning strike or reverse flash circuit, etc. , locate the location where the arc discharge occurred, and locate the location where the arc discharge occurred on the power transmission line or It is necessary to promptly inspect the component equipment for damage or other adverse effects. There is a point.

0003 Conventional technology that makes it easier to detect whether arc discharge has occurred between arc horns For example, Utility Model Publication No. 42-1091 has been proposed. In this conventional technology , a bulge is provided near the tip of the arc horn, and the heat generated by the arc discharge By visually checking whether the bulge has melted and disappeared, the arc horn can be detected. Determine whether or not arc discharge occurs between the two.

0004

[Problem that the idea aims to solve]

However, in the arc horn flash indicator technology described above, Because it is assumed that the bulge provided near the tip of the tube will melt, By shutting down the power transmission lines and distribution lines in a short time when an occurrence occurs, This contradicts the technology that attempts to ensure the integrity of the power distribution line. In other words, lightning strikes If the circuit is interrupted within a few hertz, the bulge of the arcing horn will disappear. The melting loss does not progress until it reaches the point where the Therefore, the scale of the flash is small and the arc horn is damaged. If the scratches are minor, only traces of arc discharge are visible. stop Since the arc horn is installed at a high place, it can be seen with binoculars etc. The problem is that it is difficult to confirm whether arc discharge has occurred even by observing the tip. There is an issue. For this reason, components of power transmission lines, such as insulators, may be damaged by arc discharge. When inspecting whether a secondary disaster has occurred such as a rack, identify the location where arc discharge has occurred. It is difficult to identify and requires a great deal of effort to inspect.

[0005] The present invention has been developed in view of the above problems, and is designed to ensure that the indicator operates in the event of a flash fault. The presence or absence of arc discharge can be easily confirmed using the actual product, and the product can be used repeatedly. It is an object of the present invention to provide a flash flash indicator for an arc horn that can be used for various purposes.

[0006]

[Means to solve the problem]

The arc horn flash indicator according to the present invention is a base member fixed to the arc horn. , one end of which is fixed to the base member, and the other end is pulled away from the arc horn by elastic force. an elastic member biased in the direction of separation; and a flat member attached to the other end of the elastic member. The arc horn can be held under normal temperature conditions, and the heat generated by arc discharge can be avoided. a shape-memory alloy indicator member that receives and restores its shape to release the grip on the arc horn; a contact surface of the indicating member when the indicating member grips the arc horn; /or The contact surface of the arc horn is characterized by a color display.

[0007]

[Effect]

In the present invention, the shape memory alloy indicator member can be used under the normal temperature of the flash indicator. Maintain the first posture of gripping the arc horn. This will support the marking member. The elastic member is placed between the base member of the flash indicator and the indicator member along the arc horn. is fixed. On the other hand, when arc discharge occurs, the heat is transferred to the shape memory The information is transmitted to the gold indicator member, and this shape memory alloy indicator member makes it easier to grip the arc horn. Return to the position to be released. Then, the elastic member deforms when it is elastic, and the marking part material is separated from the arcing horn. This indicating member is holding the arc horn. At least one of the contact surfaces where the marking member and the arc horn come into contact with each other is colored. Since the color display is done, by separating the marking member from the arc horn, This color display is exposed. This makes it possible to see this information from a distance with the naked eye or with binoculars. The color display can be easily checked and therefore the occurrence of lightning can be easily detected. I can do it. In addition, since the elastic member and indicator member remain as they are, the The indicating member continues to indicate the occurrence of arc discharge even after time has passed since the occurrence of arc discharge. Ru. Therefore, it is necessary to investigate at any time whether flash faults occur between arc horns. I can do it. In addition, since the device of this invention uses heat generated by arc discharge, shape recording is possible. Does not require a special energy source to heat the memory alloy marking member, and As mentioned above, since the structure is simple, the shape memory alloy marking member can be used again with an arc. By attaching a horn, it can be used repeatedly, and it can also be used with existing arc horns. It is also easy to apply to

[0008] In addition, the color display applied to the contact surface of the marking member and/or the arc horn is brightly colored. Various methods such as coloring, striped patterns, or application of fluorescent paint can be employed. Therefore, Coupled with the fact that the shape of the marking member changes from the gripping state of the arc horn, Even in conditions with poor visibility such as in the cold or at night, flashovers have occurred between the arc horns. can be clearly seen.

[0009]

【Example】

Next, embodiments of the present invention will be described with reference to the accompanying drawings.

0010 FIG. 1 is a perspective view showing a flash flash indicator for an arc horn according to an embodiment of the present invention, and FIG. FIG.

[0011] The arc horn 6 is bent near its base end and near its tip. It is composed of straight parts on the side, the center, and the tip side.

0012 The fixing member 1, which is the base member of this device, surrounds the arc horn 6 and then wraps its end. The base of the arc horn 6 is tightened with fasteners such as bolts and nuts. It is attached to the straight part on the end side. The spacing spring member 2 as an elastic member is a plate. It is made up of a spring, etc., and its one end is turned toward the tip of the arc horn 6. The other end is fixed to the fixing member 1. Moreover, the spacing spring member 2 is shown in FIG. As shown by the dotted line, one end of the arc horn 6 due to its own elastic force. It is constantly biased in the direction of moving away from it.

[0013] An indicator member 3 made of a shape memory alloy is attached to the one end of the spacing spring member 2. It is being This indicator member 3 is, as shown by the solid line in FIG. It is possible to transform the arc horn 6 into a gripping state under normal temperatures. When both are heated to a high temperature above the transformation temperature, they form a flat plate as shown by the broken line. Restore. That is, this shape memory alloy indicator member 3 becomes flat when a high temperature phase appears. It is stored in advance as follows.

[0014] Both ends of the marking member 3 in the width direction are slightly bent to form a guide portion 3a. Immediately In other words, when the marking member 3 is bent into a cylindrical shape at room temperature, the open end thereof is slightly outward. The indicator member 3 is fitted onto the arc horn 6 by pushing open the open end. It serves as a guide section 3a when

[0015] The surface where the marking member 3 contacts the arc horn 6, that is, the marking member 3 is deformed into a cylindrical shape. A color display 4 is applied to the surface that becomes inside when the camera is folded. This color display 4 is For example, you can use urethane paint to create alternating stripes of red and yellow. Bye. In addition, instead of painting, water-resistant stickers can be attached to display colors. It may be set to 4. Furthermore, if you color the color display 4 using fluorescent paint, it will be easier to see at night. This will further improve recognition.

[0016] Figure 2 shows the above-mentioned embodiment of the arc horn installed in the tension insulator of the power transmission line. FIG. 3 is a schematic diagram showing the case where the device is installed, and is a view taken along the line 1-1.

[0017] A tension insulator chain 7 consisting of a plurality of tension insulators has a track side seam connected to both ends of the tension insulator chain 7. It is pulled in its length direction by the shield ring 8a and the ground side shield ring 8b. There is. These shield rings 8a and 8b have a U-shaped ring part and a tensile insulator chain 7 connected to each other. and a connecting portion that connects the ring portion and the connecting portion. There is. The arc horns 6 (6a, 6b) are shield rings 8a, 8b, respectively. It is attached near the connection point between the connection part and the connection part in the present embodiment. A flash indicator is installed.

[0018] Next, the operation of the arc horn flash indicator configured as described above will be explained. Ru.

[0019] First, the marking member 4 is curved and deformed into a cylindrical shape with the surface with the color display 4 on the inside. , the guide part 3a is slid on the circumferential surface of the arc horn 6, and the indicator member 3 is attached to the arc horn 6. Insert into. As a result, the elastic member 2 is arranged along the arc horn 6, and the color The display 4 is hidden inside the indicator member 3. An arc hoover may occur due to lightning or reverse flash. When an arc discharge occurs between the lines 6a and 6b, the heat of this arc discharge will cause the line side The vicinity of the tip of the arc horn 6a or the ground side arc horn 6b temporarily becomes high temperature, The indicator member 3 made of a shape memory alloy is heated by the heat conduction. And this The temperature of the indicating member 3 heated by the heat conduction increases due to the shape memory When the temperature reaches the transformation temperature of gold or higher, the memory shape of the high-temperature phase, that is, the dot-dash line in Figure 1, changes. Instantly restores to the flat plate shape shown. Then, the marking member 3 is attached to the arc horn 6. When the grip is released, the indicating member 3 is moved by the elastic force of the elastic member 2 to the arc horns 6a, 6. Move to a position away from b and maintain this state. As a result, color display 4 At the same time, the indicator member 3 is clearly separated from the arc horns 6a, 6b. Therefore, due to lightning strikes or reverse flash accidents, an arc may occur between the arc horns 6a and 6b. The occurrence of a discharge is clearly indicated by the appearance of the color display 4 and the position of the display member 3. shown.

[0020] Therefore, according to the device of this embodiment, it is possible to Even in the case of This can be easily confirmed from the ground. As a result, the arc horn 6a, It is possible to investigate at any time whether or not a flashover has occurred between 6b and 6b. Also, color table The visibility of the indicator 4 is high, so it can be easily seen even on bad weather or in dim light. can be done. Furthermore, if the color display 4 is applied with fluorescent paint or luminous paint, Observation at night is also possible.

[0021] FIG. 4 is a perspective view showing a second embodiment of the present invention. In this embodiment, the marking member 3 is Contact surface of the arc horn 6 that comes into contact with the display member 3 when the arc horn 6 is gripped The only difference from the embodiment shown in FIG. 1 is that a color display 9 is applied to the display.

[0022] In this example, arc discharge occurs and the shape memory alloy marking member 3 becomes a flat plate. When the shape is restored and separated from the arc horn 6, the display member 3 A color display 9 appears in the previously displayed area. As a result, the color display 9 or the marking member 3 By checking the position of the arc discharge, it is possible to detect the occurrence of arc discharge.

[0023] FIG. 5 is a schematic diagram showing a third embodiment of the present invention. Made of shape memory alloy in this example As shown by the solid line, the marking member 10 is curved into a U-shape, and then the open end thereof is bent. The guide portion 10a is formed by folding back inward over a predetermined length. This marking member 10 is shown by the two-dot chain line in the figure at a high temperature above the transformation point. Restore into a semicircular shape as shown. Note that the color display is performed on the inner surface or arc of the marking member 10. It may be provided on any of the circumferential surfaces of the horn 6.

[0024] This embodiment also has the same effects as the embodiments shown in FIGS. 1 and 4.

[0025] As mentioned above, since the device of the present invention has a simple structure, the indicating members 3 and 9 can be replaced again. By attaching it, it can be used repeatedly and can be attached to an existing arc horn. It is also easy to apply.

[0026]

[Effect of the idea] As explained above, according to the present invention, the shape memory alloy marking member is an arc horn. Arrange these against the elastic force of the elastic member so as to grasp the In the event of a failure, the shape memory alloy marking member may be changed due to the heat of the arc discharge. and a display member is configured to release the gripped state of the arc horn by After metamorphosis, the structure is configured so that a color display appears, so it can be seen with the naked eye even from a remote location. By visually checking the position of the marking member and the color display using binoculars etc. A flashover between arc horns can be easily and reliably detected. In addition, the above-mentioned mark Since the indicator member is held as it is in a position away from the arc horn, flash sparks are prevented. It is possible to continuously indicate the occurrence of problems, and to easily investigate this at any time. can.

[0027] Furthermore, the device of the present invention does not require a special energy source and has a simple structure. Therefore, it is easy to apply to existing electric cables and can be used repeatedly. It also has the advantage of being able to.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a flash flash indicator of an arc horn according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a case where the device of this embodiment is attached to an arc horn included in a tension insulator of a power transmission line.

FIG. 3 is a view taken along the line 1-1.

FIG. 4 is a perspective view showing a flash indicator of an arc horn according to a second embodiment of the present invention;

FIG. 5 is a schematic diagram showing a flash flash indicator of an arc horn according to a third embodiment of the present invention.

[Explanation of symbols]

1; Fixed member 2; Elastic member 3,10; Indication member 4,9; Color display 6, 6a, 6b; arc horn 7; Tensile insulators 8a, 8b; Shield ring

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Yasuo Kojima Fujikura Den, 1-5-1 Kiba, Koto-ku, Tokyo Within Line Co., Ltd. (72) Creator Akifumi Onishi Fujikura Den, 1-5-1 Kiba, Koto-ku, Tokyo Within Line Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A base member fixed to an arcing horn; an elastic member having one end fixed to the base member and the other end biased in a direction away from the arcing horn by elastic force; A shape memory alloy indicator member is attached to the other end and is capable of gripping the arcing horn under normal temperatures and is restored to its original state by receiving heat from arc discharge to release gripping of the arcing horn. A flashover indicator for an arc horn, characterized in that a contact surface of the indicator member and/or a contact surface of the arc horn when the indicator member grips the arc horn is colored.