JPH03242520A - Monitoring method for abnormal high temperature of machinery and apparatus - Google Patents

Abstract

PURPOSE:To prevent an overheat accident of a device by a method wherein a gas emitter which emits gas at the occurrence of a temperature rise is provided at predetermined points of the device, and an alarming signal is output when a gas detector detects the gas emitted from the gas emitter. CONSTITUTION:A gas emitter GH is applied to a connecting screw NJ of a breaker BK, an electromagnetic switch MS or a terminal bed TB with a cable DS and also the other parts possible to generate heat in each panel board 11, which emits gas at the time of a temperature rise. A gas detector 12 detects the gas emitted from the gas emitter GH, based on which an alarming signal S2 is output. The alarming signal S2 is output from the gas detector 12 itself or a receiver part 22 connected to the gas detector 12.

Description

[Detailed Description of the Invention]: Overview] Regarding a method for monitoring abnormal high temperatures of various equipment such as aether equipment, electrical parts, mechanical equipment, and buildings, S: To prevent equipment overheating accidents due to poor connections etc. The purpose of this method is to provide a method for monitoring abnormally high salt levels that can be used effectively, by providing a gas emitting body that releases gas as the temperature rises at a predetermined location of the equipment, and monitoring the amount of gas emitted from the gas emitting body. It is characterized in that an alarm signal is output when a gas detector detects gas.

[Industrial Application Field] The present invention is applicable to circuit breakers in electrical equipment such as power receiving boards or distribution boards that monitor abnormally high salt levels in various equipment such as electrical equipment, electrical parts, mechanical equipment, and buildings. There is a tendency for overheating accidents due to poor tightening of screws at the connection points of various electrical devices, such as terminal blocks, cables, etc., to occur frequently, and measures to prevent such accidents are desired.

[Conventional technology]

Conventionally, screws such as bolts and nuts are often used to connect electrical cables to circuit breakers, terminal blocks, etc. When the screws for these connections become loose, the contact resistance value of that part increases, making it easy to generate heat, and depending on the state of the load, that is, depending on the magnitude and time of the flowing current, an overheating accident may occur.

Therefore, when performing these connection works, it is necessary to sufficiently tighten the screws at the connection points so that they do not loosen, but there are generally many connection points, and there are some places that are hidden behind equipment and are difficult to ensure L2. Therefore, there was a possibility that all of the screws could not be securely tightened.

Furthermore, even if the screws were properly tightened at the beginning, vibrations and shocks during use could cause them to loosen, leading to overheating accidents.

Kira (2, electric motor, breaker, electric (B switch, cable t)
If the current flowing through the device exceeds the rated current or the constant current, the device itself may fail, and depending on how long this condition lasts, there is a risk of a serious accident. Ta.

：Three problems to be solved by the invention 2 Therefore, in order to prevent such overheating accidents, in the past, it was necessary to check the tightening of screws during connection work,
They relied on human-force tactics, such as checking whether screws were loose or overheating on a daily basis, and retightening screws.

In addition, in order to make it easier to check the heat generation state, color-changing tape that changes color due to the increase in salinity is pasted on areas where heat may be generated. Since the color of the tape only changes depending on the situation, it is necessary for a supervisor to constantly monitor the equipment or distribution board, and this makes it impossible to carry out normal long-term monitoring. Moreover, there was a problem in that it was not easy to determine whether the color of the tape had changed.

As described above, in the past, no effective measures have been taken to prevent equipment overheating accidents.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide an abnormally high temperature monitoring method that can be effectively used to prevent equipment overheating accidents due to poor connections and the like.

:Means for solving the problem: In order to solve the above problem in the monitoring method according to the present invention,
As shown in Fig. 1, a gas emitting body GH that emits gas when the temperature rises is installed at a predetermined location of the equipment BK, DSNJ (T), and the gas emitted from the gas emitting body GH is detected by the gas. Device 12 detects l-7! This alarm signal S
5 so that 2 is output] Action] Gas emitting body GH; temperature rise; thus, gas is released.

2. Detects the yl radiation emitted from the gas emitting body GH 5. Based on it, sends an alarm signal S.
Two items are output.

W noise signal S2: Well, from the gas detector 12 itself, or connected to the force detector 12? This signal is output from the receiving section 22.

Example 2・ Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of an abnormal high temperature monitoring system 1 according to the present invention.

The abnormal high temperature monitoring system 1 includes gas detectors 12 installed inside a large number of distribution boards 11, although only one is shown in the figure, and an output signal line 1 from each gas detector 12.
3.13... is connected to the central monitoring board 21 or S,
In each distribution board 11, gas-emitting paint is applied to the breaker BK, W magnetic switch MS, terminal block TB, etc., and the connectors and connectors used to connect the cable DS, as well as other locations that may generate heat. GH is applied.

Gas release paint GH: Gas detector 1 due to temperature rise
It is a paint that emits a gas that can be detected by 2. Gas releasing paint OH is a paint that uses a low boiling point organic solvent such as n-hexane, n-hebutane, toluene, quinolene, tetrahydrofuran, alcohols, etc. as a solvent component. The gas boils and evaporates at temperatures above the boiling point, for example, from several tens of degrees Celsius to over 100 degrees Celsius, and the gas concentration inside the distribution board 11 increases rapidly.

Gas-emitting paint OH can be used, for example, when inspecting for improper tightening during connection work in the distribution board 11, when confirming the type of equipment, or when confirming that the connection to the equipment is correct. At times, a certain amount or more is applied to confirm this. Places to apply gas release paint OH are screw heads, wires, crimp terminals, and cable DS.
, or the boundary between these, the main body of the breaker BK or the electromagnetic switch MS, etc.

The gas detector 12 is located in the gas release chamber # in the distribution board 11.
Outputs an output signal Sl corresponding to the concentration of gas released by JC;H. Close gas detector 12:! For example, a catalytic combustion type that detects combustible gas is preferably used, and various other known methods such as a semiconductor type, a hot wire type semiconductor type, and a thin film type are also used depending on the type of gas-emitting paint GH. are used.

The central monitoring board 21 receives output signals S from each gas detector 12.
1, a display section 23 that displays the location of the abnormality or its contents, an alarm lamp 24, and an alarm buzzer 2.
5 etc.

The receiving unit 22 outputs an alarm signal S2 when each output signal S1 exceeds a certain value, lights up an alarm lamp 24, sounds an alarm buzzer 25, and displays the name and number of the distribution board 11. , position, etc. are displayed on the display section 23.

Therefore, while the distribution board 11 is in use, if the connection terminal NJ becomes loose or the temperature rises due to heat generation due to a large amount of current flowing through the breaker BK, electromagnetic switch MS, or cable DS, the temperature will rise. Gas is released from the gas release paint GH applied to the area, and the gas detector 12 detects that the gas concentration has increased, and the central monitoring board 214
An alarm will be issued at this time.

With this, it is possible to easily know that an abnormally high temperature has occurred on the distribution board 1 in the central monitoring room where the central monitoring board 21 is installed, and to check the distribution board 11 and the load. An overheating accident can be prevented by taking appropriate measures, such as stopping power transmission to No. 11 or disconnecting the load.

In the embodiments described above, as the gas-releasing paint GH, it is possible to use a type of paint that releases more gas as the temperature increases. In addition to gas-emitting 1qGH, there are also various types of solvents made into pastes, foamed plastic materials that generate carbon dioxide gas, and adhesive tapes that can be attached to equipment, etc. It is also possible to use various gas emitting bodies to release the gas by raising the gas. A plurality of gas emitting bodies emitting gas at different temperatures are used, and these are connected to the equipment (7) in the electricity distribution 111.
) m Ii: By using the appropriate one depending on the type, the status of the equipment can be monitored more closely. In that case S:,
It is convenient to make the color of the gas emitting body completely different depending on the temperature at which the gas is emitted. Furthermore, by using multiple gas emitting bodies that emit different gases and detecting the sum of the gases using separate gas detection methods (S12), it is also possible to identify equipment that is generating abnormally high temperatures. .

In the above embodiment, the location where the gas release chamber 14GH is applied may be an appropriate location inside the distribution board 11 or an outside of the distribution board 11. In that case, the gas detector 12 may be provided near the location where the gas release paint GH is applied. Note that the gas emitting body may be provided without being in direct contact with the equipment, that is, at a distance from the equipment. Therefore, it is also possible to hang it indoors, for example. Further, the gas detector 12 may be installed in various control panels or in rooms such as power receiving rooms and substation rooms, and monitor abnormally high salt levels in equipment installed in each panel or room. . Furthermore, the equipment includes not only the electrical parts mentioned above, but also various equipment such as other aether parts, electrical equipment such as electric equipment, IIj such as machine tools, mechanical equipment, automobiles, aircraft, ships, and buildings. It can be used to monitor abnormally high salt levels.

In the embodiments described above, the configuration of the central monitoring board 21 can be modified in various ways. For example, it is also possible to automatically stop power transmission to the distribution board 11 in response to the alarm signal S2. It is also possible to send the alarm signal S2 to another room or remote location. The central monitoring board 21 or a part thereof may be provided inside or near each distribution board 11.

Alternatively, the receiving section 22 may be provided inside the gas detector 12 so that the gas detector 12 outputs an alarm signal when it detects that the gas concentration has exceeded a certain level.

In the figure, 12 is a gas detector; S2 is an alarm signal, GH is a gas emitting body (gas emitting paint), BK is breaker (equipment), DS is cable (equipment), NJ is a connection screw (equipment).

Claims (1)

[Claims] (1) Gas emitting body (G
H) is installed at a predetermined location of the equipment (BK) (DS) (NJ), and when the gas detector (12) detects the gas released from the gas emitting body (GH), an alarm signal (S
2) A method for monitoring abnormal high temperatures of equipment, characterized in that the following is output.