JPH0312022Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to overheat sensing capsules installed in high-voltage conductive parts of power plants, substations, etc. where overheating is a concern.

(Conventional technology) Today, many substations, etc. are becoming unmanned, and even if abnormal overheating occurs in high-voltage conductive parts due to some kind of malfunction, detection is delayed, and power outage accidents occur from time to time, resulting in significant damage to customers. It is considered a problem because it causes trouble for people. Conventionally, as a means of discovering areas where the temperature is rising due to overheating, finger temperature tapes that can indicate the overheating status by color changes are pasted on areas where overheating is likely to occur, and maintenance personnel regularly patrol the areas to detect overheating areas. We are working to discover these and prevent power outage accidents.

(Problem that the invention aims to solve) Conventionally, maintenance personnel patrol each substation etc. to check for color changes in the finger temperature tapes affixed to high-voltage conductive parts, but there are many locations where they are affixed. Because it is located at a high altitude, it is not easy to check all the finger temperature tapes, and in reality, it can only be visited once or twice a month. Therefore, the current situation is that there is a delay in discovering the location where abnormal overheating is occurring, resulting in frequent power outage accidents.

This idea operates a heat-sensing member made of a shape memory alloy, etc. inside the container at a predetermined superheat temperature, hits a piezoelectric ignition device, and ignites and explodes liquefied gas, gunpowder, etc.
This is an overheat sensing capsule that allows the blast wave to pass through the whistle part of the upper stopper in a jet shape to generate high frequency sound and escape into the atmosphere.This capsule is installed in high voltage conductive parts and other places where there is a risk of overheating. The blast wave generates high-frequency sound, and this high-frequency sound is received by a high-frequency receiver, etc., and an automatic alarm is displayed at a lifeguard monitoring station, etc., so that abnormal overheating points can be discovered before they occur, thereby preventing power outage accidents. It is.

(Means for Solving the Problems) In order to solve the problems of the conventional methods, this idea is to fill gunpowder, liquefied gas, etc., so that the upper plate can be penetrated by a blast wave, and to press the button on the lower plate. A whistle part that forms an ejection hole for ejecting a blast wave in the upper part of the metal vessel, which is equipped with a containment chamber equipped with a piezoelectric igniter that can ignite gunpowder, etc., and generates high-frequency sound when the blast wave passes through. and a heat sensing member made of a shape memory alloy or the like that deforms and protrudes between the push button of the piezoelectric ignition device and the lower plug, and presses the push button when a predetermined overheating temperature is reached. The purpose is to provide a technical means that is inserted in a constantly contracted state.

(Function) According to the overheat sensing capsule of this invention, when the high-voltage conductive part rises to a predetermined overheating temperature due to abnormal overheating, the heat sensing member instantly deforms and protrudes, and when the push button is pressed, the piezoelectric ignition device fires explosives or liquefied gas. ignite and explode the top plate of the containment chamber, the blast wave passes through the whistle part of the ejection hole in a jet state and is emitted into the atmosphere while emitting high-frequency sound, and this high-frequency sound is transmitted to another high-frequency receiver. Abnormal heating can be automatically displayed by detecting it.

(Example) This invention will be described below based on an example shown in the drawings.

In Figures 1 to 3, 6 is a sturdy metal container that will not be destroyed in the event of an explosion of gunpowder, etc. It has a top plate 1 that can be broken through by a blast, and a push button 3 that can be pressed to release explosives, etc. A filling chamber 5 in which a small amount of gunpowder, flammable liquefied gas, etc. is sealed is formed between the lower plate 2 and the lower plate 2 provided with a piezoelectric ignition device 4 capable of igniting.

Reference numeral 9 denotes an upper stopper which has a jet hole 7 through which the blast wave passes, and a whistle part 8 that emits high-frequency sound when the blast wave passes through. Screw it into place at the top.

Reference numeral 10 denotes a lower plug that is screwed onto the lower part of the metal container body 6, and a heat sensing device made of a shape memory alloy or the like that deforms and protrudes when a predetermined overheating temperature is reached between it and the piezoelectric ignition device 4 and presses the push button 3. The member 11 is normally inserted in a contracted state.

As for the structure of the containment chamber 5 of the metal container body 6, in the capsule B shown in FIGS. 1 and 2, explosive A is placed between the upper plate 1 and the lower plate 2 and sealed, and in the capsule B shown in FIG. Although the enclosure chamber 5 is constructed of a container containing gas A', the sealed structure is not limited to this.

In addition, the upper plate 1 of the containment chamber 5 is made of a thin plate so as to be easily torn by an explosion.
It is preferable to carve grooves, grooves, etc. directly under the upper plate so that the upper plate can be ruptured by explosion and the blast wave can be easily ejected to the nozzle hole 7.

Further, the upper stopper 9 has a cylindrical portion 9a integrally formed in the upper part thereof, and has a spout hole 7 therein, and a ferrule as a whistle portion 8 is attached inside the cylindrical portion 9a, and the upper portion of the ferrule is screwed and fixed to the upper end of the cylindrical portion.

As the piezoelectric ignition device 4, the holding pin 13 of the hammer 12 is removed by pressing the push button 3, and the hammer 12 is struck against the piezoelectric element 15 by the elastic force of the spring 14, causing sparks to fly. The device is not limited to the type of device, but it may be any type of device as long as it is configured to work only in the pushing direction and hit the piezoelectric element with a hammer because it is disposable once it is detonated, so there is no need to provide a mechanism to return the push button. . Furthermore, this piezoelectric ignition device itself does not have to be destroyed after one use, so it has an inexpensive structure.

The push button 3 of the piezoelectric ignition device 4 has a T-shape so that it can be easily pressed by a heat-sensing member 11, and the heat-sensing member 11 is made of a shape memory alloy and is normally contracted into a C-shape to reach a predetermined superheat temperature of approximately 90 to 100°C. Then, both ends of the C-shaped heat sensing member rise and deform and protrude into a U-shape so that the push button 3 can be pressed.

According to the capsule of this invention, when the heat sensing member 11 made of a shape memory alloy deforms and protrudes due to abnormal overheating and the push button 3 is pressed, the piezoelectric spark of the piezoelectric igniter 4 causes the gunpowder or liquefied gas in the containment chamber to explode. The blast wave pierces through the upper plate 1, jets out into the jet hole 7, and is emitted into the atmosphere while emitting high-frequency sound at the whistle portion 8.

This capsule is to be used outside a substation, etc., and when used, a pair of capsules B and B are placed in a capsule case 17, which has a pair of storage holes 16, as shown in Fig. 4, to protect it from wind and rain. The lids 18 and 18 are separately fitted into the storage holes 16 and 16 so that the lids 18 are blown away by the blast of each capsule.If both capsules B are normal, both will explode due to overheating. It emits high-frequency sound so that even if one of the capsules fails to explode, the other capsule will explode, ensuring that abnormal overheating is reported.

FIG. 5 shows a capsule case 17 in which one capsule B is stored in the storage hole 16.

FIG. 6 shows an example in which a capsule case 17 containing a capsule of this invention is installed at a location where there is a risk of overheating, such as an external high-voltage conductive portion 19 in a substation, power plant, or the like. Reference numeral 20 denotes a high-frequency receiver for receiving high-frequency sound, and is installed in a lighting lamp 21, a steel tower, etc. within a range that can receive the high-frequency waves emitted by the explosion of the capsule. This high-frequency receiver is provided for each zone and communicated with a monitoring room where a monitoring person is present, so that reception by the receiver is automatically displayed in the monitoring room.

(Effect of the invention) According to this invention, when a part with a capsule such as a high-voltage conductive part becomes abnormally overheated and the heat sensing member reaches a predetermined overheating temperature, it instantly deforms into a memorized shape and protrudes, pushing the push button and piezoelectric The igniter is activated to emit sparks and explode the gunpowder or liquefied gas in the containment chamber all at once, which pierces the upper plate and ejects the blast wave from the nozzle in the form of a jet.When it passes through the whistle part, a high-frequency sound is emitted, causing an abnormality. It is possible to notify the heated area using high-frequency sound.

Therefore, a large number of capsule cases containing the capsules of this invention are installed in high-voltage conductive parts such as substations and power plants, and a receiver is installed in each zone that can receive high-frequency waves to prevent the capsules from exploding due to abnormal overheating and emitting high-frequency sounds. When a high frequency signal is emitted, a receiver receives the high frequency, and a supervisor at a monitoring station can immediately and automatically display the location of abnormal overheating, allowing them to repair the overheating location and prevent power outage accidents.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing an embodiment of the overheat sensing capsule filled with gunpowder of this invention, Figure 2 is a vertical sectional view showing the same explosion state, and Figure 3 is a vertical sectional view of the overheat sensing capsule filled with liquefied gas. FIG. 4 is a longitudinal sectional view showing a capsule case accommodating a pair of capsules, FIG. 5 is a longitudinal sectional view showing a capsule case accommodating one capsule, and FIG.
The figure is a schematic diagram of a substation where a capsule case containing the capsule of this invention is installed. 1... Upper plate, 2... Lower plate, 3... Push button, 4...
Piezoelectric ignition device, 5... Enclosure chamber, 6... Metal container body, 7... Spout hole, 8... Whistle part, 9...
... Upper stopper, 10 ... Lower stopper, 11 ... Heat sensing member.

Claims (1)

[Scope of utility model registration request] There is a charging chamber 5 in which gunpowder, liquefied gas, etc. are sealed so that the upper plate 1 can be penetrated by a blast wave, and the lower plate 2 is equipped with a piezoelectric type igniter 4 that can ignite the gunpowder or the like by pressing a push button 3. An upper plug 9 is provided in the upper part of the metal container body 6 provided with a blowout hole 7 for ejecting a blast wave, and a whistle part 8 is provided inside the blow hole 7 to emit a high-frequency sound when the blast wave passes through. A heat sensing member 11 made of a shape memory alloy or the like is inserted between the push button 3 of the piezoelectric ignition device 4 and the lower stopper 10, which is normally in a contracted state and deforms and protrudes to press the push button when a predetermined overheating temperature is reached. An overheat sensing capsule featuring