JPH0862057A - Device for electric connection having function of detecting heating - Google Patents

Abstract

PURPOSE: To easily confirm heating of the subject device by discriminating a difference between the color of wax and that of the ground in the vicinity of the wax which melts and flows out to the ground around it when the temperature of a heating detecting part becomes a prescribed temperature. CONSTITUTION: The wax which melts at a prescribed temperature is set at a heating detecting part 1. When the detecting part 1 comes to a heating state due to abnormality and the temperature thereof rises to or above a set melting temperature of the wax, the wax starts to melt and flows out and expands gradually to the circumference. The color of the wax and that of the ground around the wax flowing out are selected beforehand so that they can be discriminated from each other by comparison. Thereby it is recognized distinctly that the wax melts and flows out and it is known therefrom that the detecting part 1 is in the state of heating at the prescribed temperature or above.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connecting device for electric wires, electric conductors, electric appliances and the like, and more particularly to an electric connecting device having a function of detecting heat generation.

[0002]

2. Description of the Related Art Electrical connection devices (electric wire connection clamps, sleeves, terminals, bus duct connection parts, etc.) for electric wires, electric conductors, electric equipment (equipment equipment such as power transmission, distribution, substation, etc.)
In the above, the temperature may be abnormally increased due to poor electrical connection or deterioration due to corrosion, poor construction, product life, and the like. If such a temperature rise (heat generation) is left as it is, the performance is deteriorated, which may lead to a serious accident such as power loss, burnout or melting of the connecting device, and power failure. Therefore, in order to prevent such accidents, it is necessary to constantly monitor and inspect for harmful temperature rise (heat generation).

Conventionally known methods for checking and monitoring heat generation include a method using an infrared imaging device for detecting the intensity of infrared rays emitted from a heat generating portion, and a minute resistance at a wire connecting portion is measured to generate heat from a measured resistance value. There is a method of judging the situation, a method of using a temperature indicating material that changes color by thermochemical reaction, and the like.

[0004]

In the method using the infrared imaging device for detecting the intensity of infrared rays radiated from the heat generating portion, a heat generating portion at a remote place such as a power line over a steel tower is grounded. It is excellent that you can observe it from
The equipment itself is very expensive and when it comes to line monitoring,
The measurement results are greatly affected by the load current (tidal current) flowing and meteorological conditions such as rain and wind, and the obtained measurement data varies and lacks reliability.

Further, in the method of measuring the minute resistance and judging the heat generation state from the measured resistance value, although very accurate data can be obtained and a reliable judgment can be made, the electricity of the power transmission line facility or the like is stopped. In addition, there is a problem in efficiency and economy such that the worker visits and measures at a dangerous heat generation place such as a steel tower.

Further, in the above two methods, a power source is required to operate the device, but in a place such as a power transmission line tower at a remote place, the power source is secured nearby. In many cases, there is a problem that heavy equipment such as carrying a rechargeable battery is required in such a case.

[0007] Thermosensitive materials that change color by thermochemical reaction are widely used because they can be provided at a heat-generating site by a simple means such as coating and applying or labeling.
However, since it uses the color change due to thermochemical reaction, it does not change color even if it reaches a predetermined temperature during a long use period, or conversely, it does not change color even if it does not reach a predetermined temperature, and its temperature-displaying property deteriorates. When applied outdoors, it often deteriorates under the influence of ultraviolet rays. In this way, thermosensitive materials that change color due to thermochemical reactions have problems in durability and reliability for long-term use, and must be replaced every 2-3 years, and only at locations where they can be replaced. It cannot be used and maintenance is complicated.

The present invention has been made in view of the above circumstances, and has a function of detecting heat generation (temperature rise) such as displaying when a predetermined temperature is reached, such as an electric wire, an electric conductor, or an electric device. It is an object of the present invention to provide an electrical connection device of. Moreover, it can be manufactured at low cost, has good durability and can be used for a long time, there is no individual difference in the judgment of the operator, and it is possible to easily monitor the presence or absence of temperature rise (heat generation) even at remote inspection points. An electrical connection device having a function of detecting heat generation (temperature rise) is provided.

[0009]

A wax (wax) that melts at a predetermined temperature is provided in a heat generation detecting portion, and when the temperature of the heat generation detecting portion reaches a predetermined temperature, the wax melts and the vicinity of the heat generation detecting portion and its vicinity. Of electricity having a heat generation detecting function, which is capable of detecting heat generation by distinguishing the difference between the color of the ground near the heat generation detecting section or the vicinity of the wax flow and the color of the melted wax. Connection device

[0010]

Function: A wax is set and prepared so that it melts at a predetermined temperature. The wax is set in a place where heat generation is desired to be detected. After that, the temperature of the heat generation detection unit rises due to some cause to generate heat, and when the temperature exceeds the set melting temperature of the wax, the wax starts to melt, and gradually flows out and spreads to the vicinity of the periphery.
The wax that has melted and flows out begins to solidify when the temperature becomes lower than the melting temperature, so that the wax is solidified in a wide range around the heat generation detecting portion. Therefore, if the color of the background and the color of the melted wax near the heat generation detector or the outflow area of the wax are selected so that they can be compared and identified in advance, the inspector can visually recognize that the wax has melted and flowed out. Therefore, the heat generation detection unit detects that the heat generation state is equal to or higher than the predetermined temperature. An electrical connection device is configured by incorporating such a heat generation detection function.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 2 shows an electric wire detention clamp device as an example of an electrical connecting device incorporating a heat generation detecting function. The wire detention clamp device includes a clamp body 11,
Jumper socket 14, clevis 13, tightening bolt 1
It consists of 7 etc., and the clamp body 11 has an electric wire (main line) 1
2 and the clevis 13 are compression-connected and fixed, and in the jumper socket 14, an electric wire (jumper wire) is compression-connected and fixed. After that, the convex electrical connection surface (the battledore-shaped connection portion) 15 of the clamp body and the concave electrical connection surface 16 of the jumper socket 14 are integrated by penetrating the tightening bolt 17, and the electric wire (main line) 12 And jumper wire 19 are electrically connected. After that, the clasp 13 is connected to a wire fitting, an insulator device, or the like through a fastening member (not shown) at the fastening hole portion 18, and the wire retaining clamp device is retained on the steel tower or the like.

In the electric wire retracting clamp device retained on the steel tower, heat may be generated due to various factors as described above, but the place where heat generation may occur is unevenness between the clamp body and the jumper socket. Shaped electrical connection surface portions (husk board connection portions) 15 and 16, a compression connection fixing portion 20 between the clamp body and an electric wire (main line), and a compression connection fixing portion 21 between a jumper socket and an electric wire (jumper wire) are conceivable.

In the detention clamp device of this embodiment, the heat generation detecting portion 1 is selected in the vicinity of the upper portion of the uneven electrical connection surface (the battledore-shaped connection portion) in the clamp body portion. The heat generation detection unit is not particularly limited to this, and a plurality of places may be provided. Since such a detention clamp device is usually installed at a high place such as a steel tower and away from the ground, a heat generation detector is selected so that the leaked wax can be seen well in order to facilitate monitoring and inspection work. Good.

The material and amount of the wax can be appropriately selected in consideration of the heat generation temperature, the outflow method, the ambient conditions and the like. If the wax color is selected so that the melted and run-off wax and the ground color of the equipment can be clearly distinguished, the work of monitoring and inspection is easy.

Various methods can be considered for providing the wax, which will be described with reference to FIG. As an example, FIG.
As shown in FIGS. 3 (a) and 3 (b), there is a method in which a heat detecting portion of the electrical connecting device is provided with a recess and a wax is placed therein. For placement, it is better to pour melted wax and solidify in the recess, so that it will not flow out until it melts, the work is simple and reliable, and stable for long-term use. Further, as shown in FIG. 3C, it is also possible to directly arrange the melted wax without providing the concave portion in the heat generation detecting portion. Also, when solid wax is placed in the recess, a method of stopping it with a pressing material or tape 32 (Fig. 3 (d)) so that the wax does not come off or falls, and the caulking portion 31 at the edge of the recess is How to tighten and stop (Fig. 3
(b)) may be used. The color of the presser material or tape 32 need not be noticeable if it is close to the ground color of the device. The wax may be not only solid but also powder.

As another example, as shown in FIG. 3 (e), the solid wax may be attached to the heat generation detecting portion by using a tape or an adhesive agent as it is or in a state in which it is contained in a container (case) 33. it can. When it is put in a storage item, it is required that it flows out at the melting point, but it is preferable that the storage item is a part or all of which has an open mouth. For example, the outflow port 34 is provided. Also, taking advantage of the fact that when the wax temperature reaches the melting point and liquefies, the volume of the wax tends to increase.When the wax is put in a storage item, the volume expansion of the liquefied wax causes the storage item to break and become liquid. It is also possible to design so that the wax of the above will flow out.

Although various arrangements of the wax can be considered as described above, whichever method is adopted, when heat is not generated in the heat generation detector, it is not affected by severe usage conditions (environment) or weather. It is desirable that the wax is stably arranged for a long period of time without being dropped, lost, or dropped.

FIG. 1 shows an embodiment in which the temperature of the detention clamp device of this embodiment rises, the temperature reaches the melting point of the wax in the heat generation detecting portion 1, and the wax melts and flows out and solidifies. Here is an example. The melted wax 3 flows in the direction of gravity and spreads, and begins to solidify when it reaches a point below the melting point. In this example, the temperature near the wire compression portion of the jumper wire was slightly low, so it solidified there. In the case where the temperature range above the melting point is large in the device, there is a possibility that it will flow out even around the jumper wire. Due to the difference between the melted-out and solidified wax and the background color of the apparatus and the color of the wax, the situation where heat is generated can be easily recognized visually.

As the heat generation detecting portion set in the electrical connecting device, if a place having a high possibility of heat generation or its vicinity is selected,
The efficiency of detection is high. Generally, the connection device for conducting electricity well is mainly made of aluminum or copper, which is a good conductor metal, and the gradient of the temperature of heat generation will rise and fall gently. The heat generation detector can be selected quite freely by changing the type. By doing so, it is possible to deal with the case where the appropriate heat generation detection unit is not known.

Also, since the melting temperature of the wax can be set in a wide range, it is possible to set the temperature slightly away from the predicted heat generation location.
To provide the heat generation detecting portion, it is sufficient to make good use of the melting temperature of the wax, such as adopting a wax having a slightly lower melting temperature. Further, a large number of heat generation detecting units may be provided.

In order to detect the heat generation, it is necessary for a supervisor or an inspector to visually recognize the wax that has flowed out even if the wax is passed through a telescope or the like. When the wax melts and flows out and solidifies in a certain place, it is meaningless if it is not seen by the observer or inspection worker, so it is necessary to predict the outflow state and set the heat generation detection part. . To detect heat generation in areas that are not easily approached and are distant, such as high-voltage towers and dangerous areas, it is advisable to deal with increasing the amount and number of wax.

It is also possible to assume a case in which the temperature of the heat generating point becomes higher than expected, or due to reasons such as the setting of the position of the apparatus itself, all the melted wax has flowed out and there is no remaining wax. Or change the melting temperature,
Such cases can be avoided by providing them in multiple places or changing the position setting of the device.

4 to 6 show another embodiment of the present invention. 4 shows a T-shaped sleeve for connecting electric wires, FIG. 5 shows a compression terminal for electric connection, and FIG. 6 shows an opening / closing sleeve for electric connection. Both are electrical connection devices used for electrical connection,
It has a heat generation detector. The arrangement of the heat generation detecting portion and the wax has been described above, but in these embodiments, an appropriate number and an appropriate number are provided at appropriate locations.

By the way, in connecting the electric wires, a method of compressing and connecting the electric wires with a compression tool is generally used. However, in the case of this device having a compression connecting portion, the heat generation detecting portion is prevented from being deformed or damaged during the compression connecting. It is common that the compression connection is not provided with a heat generation detector. However, the object of the present invention is achieved if the wax can be melted and flown out even if the heat generation detecting portion is compressed and deformed to some extent, such as by providing a concave portion even in the compression connection portion and disposing the wax therein. Further, as long as it is an existing electrical connection device, it goes without saying that there is no particular limitation on the setting of the heat generation detection unit.

[0026]

Since the present invention is constructed as described above, the following special effects can be obtained.

Since the wax melts and flows out at a predetermined temperature, an inspector can easily visually confirm the heat generation of the apparatus. Even devices located at high places or in remote areas can be easily judged, no special skill or skilled work is required, and maintenance management for inspections and inspections can be done reliably and easily. Further, it is economical because it does not require expensive equipment for inspection and measurement. In addition, this device uses state changes due to wax temperature changes, has excellent durability and weather resistance, does not require replacement due to aging, is economical, and is easy to maintain. .

Wax can be installed in advance in the device itself, or can be installed in the existing device later. In any case, the present invention can be configured easily at low cost and can be effectively used as an apparatus (product) having a function of determining the product life.

[Brief description of drawings]

FIG. 1 is an explanatory view of a state in which a wax melts and flows out in an electric wire detention clamp according to an embodiment of the present invention.

FIG. 2 is a perspective view of an electric wire retention clamp according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an embodiment of a heat generation detection unit in which wax is arranged.

FIG. 4 is a perspective view of an electric wire connecting T-shaped sleeve as one embodiment of the present invention.

FIG. 5 is a perspective view of a compression-type terminal for electrical connection according to an embodiment of the present invention.

FIG. 6 is a perspective view of a compression type opening / closing sleeve for electrical connection according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Heat generation detection part 2 Wax 3 Wax (melting outflow state) 11 Clamp body 12 Electric wire (main line) 13 Clevis 14 Jumper socket 15 Convex electrical connection surface (Battle plate connection part) 16 Recessed electrical connection surface (Battle plate shape) 17) Tightening bolt 18 Clevis hole 19 Electric wire (jumper wire) 20 Clamp body and electric wire (main line) compression connection fixing part 21 Jumper socket and electric wire (jumper wire) compression connection fixing part 31 Crimping part 32 Pressing material Or tape 33 Storage item (case) 34 Outlet port 41, 42, 43, 44 Electric wire

Claims (1)

[Claims] 1. A heat-melting detection unit is provided with a wax that melts at a predetermined temperature, and when the temperature of the heat-generation detection unit reaches a predetermined temperature, the wax melts and flows out from the heat-generation detection unit to the vicinity thereof.
An electric connection device having a heat generation detecting function, characterized in that heat generation can be detected by distinguishing the difference between the color of the ground near the heat generation detection section or the vicinity of the wax outflow and the color of the melted outflow wax.