JPH04131901U - Arrester with abnormal temperature indicator - Google Patents

Abstract

(57) [Summary] [Purpose] An arrester with an abnormal temperature indicator for detecting abnormal temperatures in arresters (power cable anti-corrosion layer protection devices) installed on power cable lines. [Structure] In an arrester consisting of a connecting conductor 1, an arrester element 2, and an anticorrosive layer 8, a shape memory alloy spring 9, a bias spring 10, and an indicator rod 5 are provided in series between the arrester element and the connecting conductor, and the abnormal temperature of the arrester is prevented. An arrester with an abnormal temperature indicator, characterized in that the shape memory alloy spring moves an indicator bar to indicate the abnormal temperature.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is an arrester (power cable anti-corrosion layer protector) installed on power cable lines. Regarding arresters with abnormal temperature indicators for detecting abnormal temperatures in It is.

0002

[Conventional technology and its issues]

Arresters installed on power cable lines may If abnormal voltage is applied to the blue system for a long time, the temperature of the arrester element may rise. Function may be impaired. To prevent this, an abnormal temperature table that detects the temperature when it rises abnormally There are arresters with an indicator function. This arrester with an abnormal temperature indicator is shown in FIG. 5, for example. child This indicates that there is an indicator bar between the arrester element (2) on the lower side of the connecting conductor (1) and the connecting conductor (1). (5) is installed via the coil spring (3), and one end of the indicator rod is connected to the arrester by soldering (4). A display board (6) is installed at one end and a viewing window (7) is attached to protect the entire structure from corrosion. This is covered by layer (8). And if the arrester temperature rises abnormally, The display rod (5) is moved by the coil spring (3), and the display plate (6) at the tip is melted. ) appears at the viewing window (7) to indicate abnormal temperature. However, the above abnormal temperature display mechanism operates by melting solder. Therefore, operational testing is impossible, quality control is impossible, and performance is unstable. There are also variations in soldering, making it difficult to maintain a constant operating temperature. Another problem was that once it melted, it could not be reused.

0003

[Problem that the idea aims to solve]

This invention was developed as a result of consideration of the above problems, and has a relatively simple structure. Equipped with an abnormal temperature indicator that can stably and accurately display abnormal temperatures and can be used many times. It was developed as an arrester.

0004

[Means to solve the problem]

This invention is an arrester consisting of a connecting conductor, an arrester element, and an anti-corrosion layer. A shape memory alloy spring and a bias spring are placed between the arrester element and the connecting conductor. An indicator bar is installed in series, and the shape memory alloy spring indicates when the arrester is at abnormal temperature. An arrester with an abnormal temperature indicator that displays abnormal temperatures by moving a bar. It is.

[0005]

[Effect]

In other words, the present invention uses shape memory alloy springs and vias to move the display bar with the display plate attached. Using a spring, the spring recovers its memorized shape when it reaches a predetermined temperature. Overcoming the force of the ear spring, move the display bar and make the display board appear at the peephole position. will display the abnormal temperature, and when the temperature drops to normal, it will return to its original position by the force of the bias spring. It was designed so that Therefore, abnormal temperatures can be displayed repeatedly with high accuracy. In addition, in this invention, when the above-mentioned display board returns to normal temperature, it can be seen through the peephole. By providing a retaining mechanism that keeps it visible, abnormal temperatures can be prevented during inspection. In addition, a release mechanism is provided to release this retention so that the This is what I tried to change back to. The shape memory alloys mentioned above include Ni-Ti, Cu-Zn, and Cu-Zn-Al. , Cu-Al series, Fe-Si-Mn series, and other regular shape memory alloys can be applied. .

[0006]

【Example】

An embodiment of the present invention will be described below. As shown in Figure 1, the arrester element (2) on the lower side of the connecting conductor (1) and the connecting conductor (1) A shape memory alloy spring (9), bias spring (10) and display rod (5) are installed in series between the , a display plate (6) is provided at the tip of this display rod, as well as a viewing window (7) and a display for holding and opening. It is equipped with a mechanism (20). In addition, (11) is a hardener for fixing the shape memory alloy spring, bias spring, and display rod. (12) is the cover that houses these, and (8) is the anti-corrosion layer that covers the whole. It is. The arrester with the above structure has a surface temperature of the arrester element (2) at a certain temperature. For example, when the temperature reaches 55°C to 90°C or higher, the shape memory alloy spring (9) stretches and the bias spring The display bar (5) is moved downward by overcoming the force of the screw (10), and the display plate (6) at its tip is It appears at the peephole (7) and is visible from the outside, indicating abnormal temperatures. Ru. However, if the temperature continues as it is and the temperature decreases, the shape memory alloy spring will lose the force of the bias spring. The display board will return to its original position and will no longer be visible from the viewing window, causing abnormal temperatures. I sometimes miss things that happened. Therefore, in the present invention, a holding and releasing mechanism (20) is provided in front of the display board (6). When the display board reaches the position of the viewing window (7), it will be held in this state and the hold will be released. This prevents abnormal temperatures from being overlooked by making them visible from the outside. The above holding and opening mechanism is made of spring material below the viewing window as shown in Figure 2. A holding metal fitting (14) with a protrusion (13) attached to it, and a rod (14) attached to pull it. 5), and a shape memory alloy spring allows the display board (6), which has been moved to the position of the viewing window, to protrude. It engages with the spring (13) and is restored by the force of the bias spring even if the temperature drops. It is designed to be held so that it can be seen through the peephole without returning. After confirming the abnormal temperature, pull the opening mechanism rod (15) and the display plate (6) will open. It comes off from the protrusion (13), is released, and returns to its original position by the bias spring in preparation for the next operation. It is something that can be done. In addition, the above-mentioned holding and opening mechanism is a hold having a protrusion (13) as shown in Fig. 3. A rod (15) is provided below the metal fitting (14) to push out the display plate (6) and engages with the protrusion (13). However, it is also possible to push out the retained display plate (6) with the rod and release it from the protrusion. can. Furthermore, as shown in Figure 4, attach a spring (16) to the position where it contacts the display board (6). A tapered pin (17) supported so as to be pushed further inward is provided, and engaged with this. , the held display board is removed from the tapered pin by pulling the tapered pin. It can also be removed and opened.

[0007]

[Effect of the idea]

As explained above, according to the present invention, abnormal temperatures can be repeatedly detected stably and accurately. It is possible to obtain an arrester with an abnormal temperature indicator that can be detected, and it has a remarkable effect in industry. It is something that

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an arrester with an abnormal temperature indicator according to an embodiment of the present invention.

[Figure 2] ~

FIG. 4 is a schematic diagram showing an example of a display plate holding and opening mechanism of an arrester with an abnormal temperature indicator according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a conventional arrester with an abnormal temperature indicator.

[Explanation of symbols]

1 Connecting conductor 2 Arrestor element 3 Coil spring 4 Solder 5 Display bar 6 Display board 7 Peephole 8 Anticorrosion layer 9 Shape memory alloy spring 10 Bias spring

Claims (2)

[Scope of utility model registration request] 1. In an arrester consisting of a connecting conductor, an arrester element, and a corrosion protection layer, a shape memory alloy spring, a bias spring, and an indicator rod are provided in series between the arrester element and the connecting conductor, and when the arrester is at abnormal temperature, the An arrester with an abnormal temperature indicator characterized by a shape memory alloy spring that moves an indicator bar to display abnormal temperatures. 2. Holding a display board in the direction of movement of the display bar;
2. The arrester with an abnormal temperature indicator according to claim 1, further comprising an opening mechanism.