JP6457751B2 - Overheat detection capsule and fire sign detection system - Google Patents

Description

  The present invention relates to an overheat detection capsule and a fire sign detection system.

  In DC substations for electric railways, etc., in DC cubicles containing DC equipment, the three-phase AC voltage is converted to DC voltage by the stored rectifier, and the train line is connected by a DC high speed circuit breaker (HSCB). Power is being transmitted to If a fire occurs in such a substation due to equipment trouble, etc., not only will the damage to the substation equipment increase, but it will have a major impact on the train operation and cause a great inconvenience to users. It also becomes.

  For this reason, it is important to detect the occurrence of a fire as a countermeasure against a fire at a substation, etc., but before that, it was accurately understood that an event that would lead to a fire occurred, It is necessary to be able to take appropriate measures before they occur. For that purpose, it is necessary to accurately detect that some facilities have become hot and overheated before the occurrence of the fire.

  As described above, as a method for detecting that a certain facility is in an overheated state, for example, as described in Patent Document 1, a non-contact infrared sensor is installed in the facility, and non-contact is performed. A method for calculating a temperature from a signal output from an infrared sensor is known.

JP2013-103018A

  As mentioned above, if a fire breaks out at a DC substation for railways, not only the loss of the facility itself, but also the train operation etc. will be seriously affected, causing serious inconvenience to users. Leads to problems. In addition, there is a problem that the method of installing the infrared sensor is not necessarily inexpensive. Therefore, the present inventors have eagerly developed a method and a system for detecting a sign of a fire before a fire has occurred from various angles.

  Most fires at DC substations for railways occur in DC cubicles. In addition, when a fire occurs in a DC cubicle, it is often caused by abnormal overheating of control lines, abnormal arc discharge in a DC high-speed circuit breaker, or the like. When the control line is abnormally overheated or abnormal arc discharge occurs in the DC high speed circuit breaker, smoke is often generated before a fire occurs.

  Therefore, the present inventors have detected, for example, particulates (specifically, smoke) contained in the air in the DC cubicle as one of systems for detecting a sign of a fire before a fire occurs. As a result of research on a fire sign detection system that detects a fire sign, it has been found that it is possible to detect a fire sign with relatively good sensitivity.

  However, for example, the cause of the fire in the DC cubicle is not only the abnormal overheating of the control line or the abnormal arc discharge in the DC high-speed circuit breaker, but also the metal such as the DC high-speed circuit breaker. A fire may occur due to abnormal overheating due to a drop of bolts or poor contact at a conductor. In such an abnormal overheating due to a contact failure or the like in the metal conductor portion, smoke usually does not occur unless there is a flammable substance or the like nearby.

  Therefore, simply monitoring the air in the DC cubicle, that is, the smoke (that is, fine particles) contained in the air in the facility, can detect abnormal overheating due to poor contact at the metal conductor portion as described above. It has not been possible, and it has been found that it is not always easy to detect a sign of a fire caused by this.

  The present invention has been made in view of the above problems, and it is possible to detect abnormal overheating even when fine particles such as smoke are not generated, such as poor contact at a metal conductor part in a substation or the like. The present invention aims to provide a capsule for overheat detection, and further provides a fire sign detection system using such a capsule for overheat detection.

In order to solve the above problem, the overheat detection capsule of the present invention comprises:
A main body having thermal conductivity;
A housing part that is provided in the main body part and that contains a substance that vaporizes when the temperature exceeds a predetermined temperature;
A lid member that is bonded to the main body and seals the housing in a state in which the substance is housed.
The superheated body portion, the only member fusion adhering body portion and with said lid member, when the sealing of the receiving portion by the lid member the lid member is moved is released, superheated The substance vaporized by the heat of the main body part is scattered from the housing part to the outside, and the substance that has flowed out of the housing part onto the surface of the main body part is heated on the surface of the main body part. It is characterized by being vaporized and scattered outside .
The overheat detection capsule of the present invention is
A main body having thermal conductivity;
A housing part that is provided in the main body part and that contains a substance that vaporizes when the temperature exceeds a predetermined temperature;
A lid member that is bonded to the main body and seals the housing in a state in which the substance is housed.
A hole is provided in the lid member,
A sealing member for sealing the hole by being attached to the hole;
After the lid member is bonded to the main body portion, the substance is accommodated in the accommodating portion through the hole, and the hole is sealed by the sealing member,
When the body part is overheated and the member that bonds the body part and the lid member melts, the lid member moves to release the sealing of the housing part by the lid member, and the body The substance is vaporized by overheating of the part and scattered outside.

In order to solve the above-described problem, the fire sign detection system of the present invention includes:
In a fire sign detection system that detects the occurrence of an event that can lead to a fire by monitoring particulates in the air at a facility where a cable through which current flows is arranged,
A monitoring device that monitors particulates in the air to determine whether the event has occurred;
The overheat detection described above, which is disposed on or near a current flow path, and causes the monitoring apparatus to scatter the vaporized substance that is a target for which the event is determined to have occurred by overheating. Capsules for
It is characterized by providing.

  According to the overheat detection capsule of the system as in the present invention, when the overheat detection capsule is arranged on the metal conductor part such as the terminal part of the DC high-speed circuit breaker, the metal conductor part is overheated. The member that bonds the body part of the overheat detection capsule and the lid member melts and the lid member moves and comes off, and the sealing of the housing part by the lid member is released, and the body part is housed in the housing part by overheating. It is possible to vaporize the material and disperse it to the outside.

  For this reason, if such an overheat detection capsule is placed in the vicinity of a metal conductor portion that does not generate fine particles such as smoke or odor even if it is overheated, such a metal conductor portion, for example, due to poor contact or the like. When abnormal overheating occurs, fine particles such as smoke and odor can be accurately generated from the overheat detection capsule.

  In addition, according to the fire sign detection system of the system of the present invention, as described above, overheating is performed on or in the vicinity of the current flow path where fine particles such as smoke are not generated even when abnormally overheated, such as a metal conductor portion. When a capsule for detection is arranged and the flow path is overheated due to abnormal overheating, fine particles (for example, smoke, odor, etc.) to be judged by the monitoring device as having occurred that can lead to a fire are scattered.

  For this reason, if abnormal overheating occurs due to poor contact in a metal conductor part that does not generate fine particles such as smoke even if overheated, such as the terminal of a DC high-speed circuit breaker, the metal conductor part etc. Instead of overheating, the overheat detection capsule disperses fine particles such as smoke and odor due to overheating, so that the monitoring device detects it and accurately detects abnormal overheating in such places, which can lead to a fire. It is possible to accurately detect the occurrence.

It is an image figure which shows the example which applied the fire warning detection system which concerns on this embodiment to the DC cubicle of the DC substation for railways. It is a top view which shows the structural example of the metal conductor part which consists of a terminal of a direct-current high-speed circuit breaker. It is a perspective view which shows the external appearance of the example of arrangement | positioning which has arrange | positioned the overheat detection capsule in the metal conductor part of FIG. (A) It is a perspective view which shows the external appearance of the structural example of the capsule C for overheat detection, (B) It is sectional drawing which follows the XX line of (A). It is sectional drawing showing the state which the cover member removed by the elastic force of the spring. It is sectional drawing showing the structural example of the capsule for an overheat detection comprised so that the surface C7 of a main-body part might be extended in a perpendicular direction.

  Embodiments of an overheat detection capsule and a fire sign detection system according to the present invention will be described below with reference to the drawings. However, the scope of the present invention is not limited to the following examples.

[Fire detection system]
FIG. 1 is an image diagram showing an example in which the fire sign detection system according to the present embodiment is applied to a DC cubicle of a DC substation for electric railways. In each metal container 101 of the DC cubicle 100, a control panel 102, a DC high-speed circuit breaker 103, and the like are arranged.

  First, the DC cubicle 100 will be described. The DC cubicle 100 receives, for example, a 1500 V DC current transmitted from a rectifier (not shown) on the upstream side via a cable (not shown) via the DC high-speed circuit breaker 103 and the like. The DC substation is protected by interrupting the DC current by the DC high speed circuit breaker 103 when a ground fault or overload occurs. FIG. 1 shows a case where the DC cubicle 100 is configured to have four box-shaped metal containers 101, but the DC cubicle 100 is configured to have how many metal containers 101. Whether it is done can vary depending on the scale of the DC substation.

  The fire sign detection system 1 according to the present embodiment monitors fine particles in the air in a facility where a cable through which a large current flows, such as the DC cubicle 100 of a DC substation for electric railways as described above, for example. Therefore, the occurrence of an event that can lead to a fire is detected.

  For example, as an event that may cause a fire in the DC cubicle 100 (that is, an event that may lead to a fire), (1) abnormal overheating of a control line in the control panel 102 or a control line connected to the control panel 102 Phenomena, (2) an abnormal arc discharge phenomenon in the DC high speed circuit breaker 103, (3) an abnormal overheating phenomenon in a metal conductor portion such as a terminal of the DC high speed circuit breaker 103, and the like.

  Among them, for example, if the abnormal overheating phenomenon of the control line (1) occurs, when the abnormal overheating phenomenon before the fire occurs, the coating inside the control line melts due to abnormal overheating and the smoke is very thin as fine particles. Is released into the air in the metal container 101 of the DC cubicle 100. (2) Smoke is also generated when abnormal arc discharge occurs in the DC high-speed circuit breaker 103.

  Therefore, in the fire sign detection system 1 according to the present embodiment, these smoke generations are monitored to determine whether or not an event that can lead to a fire has occurred.

  Specifically, as shown in FIG. 1, the fire sign detection system 1 is configured to include a monitoring device 2 that monitors particulates in the air and determines whether an event that may lead to a fire has occurred. Is done. In the present embodiment, as described above, a smoke detector that detects smoke in the air is used as the monitoring device 2 by paying attention to the fact that there are many events that can lead to a fire that may cause smoke. . As the smoke detector, for example, a sampling tube type smoke detector described in JP-A-2004-78807 can be used.

  For example, the sampling pipe 3 is provided in the portion of the duct 104 of each metal container 101 of the DC cubicle 100, and an opening (not shown) is provided in the portion of the sampling pipe 3 that faces the exhaust port of each duct 104. And by sucking the air in the sampling pipe 3 from the monitoring device 2 (smoke detector) side, the air in each metal container 101 exhausted from the exhaust port of each duct 104 is sucked into the monitoring device 2. It is possible to configure.

  Instead of the configuration in which the air exhausted from the duct 104 of each metal container 101 of the DC cubicle 100 is sucked, for example, each metal container is connected by the sampling pipe 3 by providing an opening on the wall surface of each metal container 101 or the like. It is possible to directly suck the air in the 101, and it is also possible to configure the monitoring device 2 to be installed in each metal container 101.

  At that time, although not shown, the smoke detector as the monitoring device 2 includes, for example, a light emitting means for irradiating the sucked air with visible light or laser light, and a light receiving means for receiving light emitted from the light emitting means. With. When fine particles such as smoke are present in the air, the light emitted from the light emitting means is scattered. The light is received by the light receiving means to generate a pulse signal, which is then processed into signals, and so on. It can be configured to detect the concentration of the fine particles.

  The monitoring device 2 is configured to determine that a smoke has occurred, that is, an event that may lead to a fire has occurred when the concentration of the detected particulate matter such as smoke is equal to or higher than a predetermined concentration. Is possible.

  When the monitoring device 2 determines that an event that may lead to a fire has occurred as described above, for example, the monitoring device 2 displays the fact on a screen provided in the command room or the like, or utters a sound. It is possible to configure to take necessary measures such as warning or stopping power transmission to the DC cubicle 100.

  In the fire sign detection system 1 according to the present embodiment, as described above, for example, an abnormal overheating of a control line that causes a fire occurring in each metal container 101 of the DC cubicle 100 or an abnormal condition in the DC high-speed circuit breaker 103. Note that arc discharge or the like generates fine particles such as smoke. And it collects the air in each metal container 101, and when fine particles, such as smoke, exist in air more than predetermined concentration, it is judged that the event which may lead to a fire has occurred.

  In addition, arc discharge also occurs when performing a normal interruption operation in the DC high-speed circuit breaker 103, and smoke is generated. In this case, an event has occurred in which the monitoring device 2 detects it and can lead to a fire. If it is determined that the normal interruption operation is erroneously detected as an event that may lead to a fire. Therefore, in such a case, for example, when the DC high speed circuit breaker 103 performs a normal interruption operation, a signal is transmitted from the DC high speed circuit breaker 103 to the monitoring device 2 (smoke detector). The monitoring device 2 can be configured not to determine that smoke has occurred, that is, an event that could lead to a fire has occurred, even if the concentration of particulates such as smoke in the air increases at that time. is there.

  On the other hand, smoke does not occur in the phenomenon (3) described above, that is, in the abnormal overheating phenomenon in the metal conductor portion such as the terminal of the DC high speed circuit breaker 103. This will be specifically described below.

  Various configurations exist for the configuration of the metal conductor portion including the terminals of the DC high-speed circuit breaker 103, and as shown in FIG. 2, for example, from the wall surface 101W of the metal container 101 of the DC cubicle 100 through the insulator 101I. Assume that the protruding terminal 101T is configured to be sandwiched by a terminal 103T having a bifurcated tip at the DC high speed circuit breaker 103. FIG. 2 is a view of an example of the connection portion of the terminal 103T of the DC high-speed circuit breaker 103 as viewed from the upper side. As shown in FIG. Yes.

  In this case, for example, when contact failure occurs due to poor insertion of the terminal 103T of the DC high-speed circuit breaker 103 to the terminal 101T, the electrical resistance at that portion increases, and a large current flows through that portion, causing abnormal overheating. There is a case. However, in such a connection portion, there is nothing that covers the terminals 101T and 103T, and there is no thing that burns or melts in the vicinity, so smoke may not be emitted even if abnormally overheated.

  However, if the particulate matter such as smoke is not released and the concentration of the particulate matter in the air does not change even if abnormal overheating occurs in this way, in the above-described fire sign detection system 1, smoke is detected by the smoke detector that is the monitoring device 2. No increase in the concentration of fine particles such as is detected. Therefore, in the above-described fire sign detection system 1, the abnormal overheating phenomenon in the metal conductor portion such as the terminal of the (3) DC high speed circuit breaker 103 cannot be detected as an event that may lead to a fire.

  Therefore, in the fire sign detection system 1 according to the present embodiment, such a situation is avoided and even when abnormal overheating occurs in a metal conductor portion such as the terminal 103T of the DC high-speed circuit breaker 103, a fire is caused. In order to be able to accurately detect the occurrence of an event that can be connected, for example, as shown in FIG. 3, the overheat detection capsule C is arranged in such a portion.

  That is, in the fire sign detection system 1 according to the present embodiment, the overheat detection capsule C is placed on or near the terminal 101T on the metal container 101 side and the terminal 103T of the DC high speed circuit breaker 103, which are current flow paths. For example, when the flow path is abnormally overheated, the overheat detection capsule C is overheated by the heat when the flow path is abnormally overheated. Configure. When the overheat detection capsule C is overheated, the monitoring device 2 (that is, the smoke detector in the present embodiment) determines the occurrence of an event that may lead to a fire (that is, in the present embodiment, the particulate that is the target). (Smoke) is scattered.

  In the present embodiment, as described above, in a portion where no fine particles such as smoke are generated even when abnormal overheating occurs, such as the metal conductor portion such as the terminal 103T of the (3) DC high speed circuit breaker 103 described above, Smoke and other fine particles are scattered from the overheat detection capsule C heated by heat and detected by the smoke detector, which is the monitoring device 2, to cause an abnormal overheating, that is, an event that can lead to a fire. It is supposed to be detected.

  As shown in FIG. 1, when the DC high speed circuit breaker 103 has two terminals on the upper and lower sides, for example, the overheat detection capsule C may be disposed on both terminals, Alternatively, the overheat detection capsule C may be arranged only at one of the terminals. In addition, the overheat detection capsule C may be disposed in a portion other than the terminal 103T of the DC high-speed circuit breaker 103 as long as it is a metal conductor portion in which fine particles such as smoke may not be generated even if abnormal overheating occurs. The overheat detection capsule C can be disposed at an appropriate position. Further, a configuration example of the overheat detection capsule C will be described later.

[effect]
As described above, according to the fire sign detection system 1 according to the present embodiment, in a facility such as the DC cubicle 100 of the DC substation for electric railways where a cable through which a large current flows is disposed, fine particles in the air are collected. A monitoring device 2 such as a smoke detector is provided for monitoring and judging whether or not an event that may lead to a fire has occurred. In addition, an overheat detection capsule C is disposed on or in the vicinity of a current flow path where fine particles such as smoke are not generated even when abnormally overheated, such as a metal conductor portion such as the terminal 103T of the DC high speed circuit breaker 103, When the flow path is overheated due to an abnormality such as a contact failure, the overheat detection capsule C is also overheated, and the monitoring device 2 scatters the fine particles (for example, smoke) that are determined to have an event that may lead to a fire. It was configured as follows.

  Therefore, for example, an object such as smoke that causes the monitoring device 2 to determine that an event that could lead to a fire has occurred, such as abnormal control line overheating in the DC cubicle 100 or abnormal arc discharge in the DC high speed circuit breaker 103. In the case where fine particles are generated, it is possible for the monitoring device 2 to detect it and accurately detect that an event that could lead to a fire has occurred.

  In addition, when abnormal overheating occurs due to poor contact or the like in a metal conductor portion that does not generate fine particles such as smoke even if overheated, such as the terminal 103T of the DC high speed circuit breaker 103, the metal conductor Since the overheat detection capsule C scatters fine particles such as smoke due to overheating instead of a portion or the like, the monitoring device 2 can accurately detect abnormal overheating at such a location and lead to a fire. It is possible to accurately detect that an event has occurred.

  Therefore, for example, if the monitoring device 2 is configured so as to issue a warning, it is possible to prevent a fire from occurring in a facility such as the DC cubicle 100 of the DC substation for railways.

  In the above-described embodiment, the monitoring device 2 is a smoke detector that detects smoke in the air, and the particulate that is a target for which the monitoring device 2 determines that an event that may lead to a fire has occurred is smoke. In addition to this, for example, the monitoring device 2 is an odor detector, and the particulates for which the monitoring device 2 determines that an event that may lead to a fire has occurred is an odor (that is, specific to human olfaction). The present invention can also be applied to the case of fine particles that make a scent feel. This also applies to the description of the overheat detection capsule C below.

  In the above embodiment, the case where the DC cubicle 100 of the DC substation for railways is exemplified as the facility where the cable through which the current flows is arranged, but the fire sign detection system 1 according to the present invention is In addition to the DC cubicle 100 of such a DC substation for electric railways, the present invention can be applied to, for example, a power plant, a substation, and the like. For example, there is a current flow path such as a distribution board in the facility. The road may be overheated due to abnormalities such as poor contact or short circuit, and it can be applied to a place where fine particles such as smoke are not generated even if overheating occurs.

[Overheat detection capsule]
Next, a specific example of the overheat detection capsule C will be described. Note that the overheat detection capsule C used in the fire sign detection system 1 according to the above embodiment is not limited to the one having the following configuration, and has the following effects as long as it has the above effects. It is also possible to use an overheat detection capsule having the following structure.

  The overheat detection capsule C can be configured as shown in FIGS. 4A and 4B, for example. 4A is a perspective view showing an appearance of a configuration example of the overheat detection capsule C, and FIG. 4B is a cross-sectional view taken along line XX in FIG. 4A.

  The overheat detection capsule C of this configuration example is formed so that the housing part C2 drilled in the main body part C1 is sealed with a lid member C3 bonded to the main body part C2, and is contained in the housing part C2. Contains a substance S that vaporizes when the temperature rises above a predetermined temperature. As described above, when the main body C1 is overheated due to abnormal overheating of the terminals 103T and the like of the DC high speed circuit breaker 103, the adhesive C4 that bonds the main body C1 and the lid member C3 melts. When the lid member C3 moves and comes off, the sealing of the accommodating portion C2 by the lid member C3 is released. And while the accommodating part C2 is open | released, the substance S vaporizes by the overheating of the main-body part C1, and is scattered outside.

  This vaporized and scattered material S is the fine particles (that is, smoke, odor, etc.) that are judged to have occurred as described above. Hereinafter, the configuration and the like of the overheat detection capsule C will be described in more detail.

  The body part C1 of the overheat detection capsule C is heated by a metal or the like in order to accurately transmit the abnormally heated heat of the terminal 103T of the DC high speed circuit breaker 103 to the substance S in the housing part C2 as described above. It is made of a conductive material. In the present embodiment, the main body C1 is made of copper (Cu) having excellent thermal conductivity, and the lid member C3 is also made of copper.

  In the present embodiment, solder is used as the adhesive C4 that bonds the lid member C3 to the main body C1. That is, the lid member C3 is soldered to the main body C1. Therefore, in order to make it easy to solder the lid member C3 to the main body portion C1, the copper surfaces constituting the main body portion C1 and the lid member C3 are plated with tin (Sn) or the like.

  The main body C1 of the overheat detection capsule C can be formed of a material other than a metal such as copper. Further, when the main body C1 is overheated due to abnormal overheating of the terminal 103T of the DC high speed circuit breaker 103, the adhesive C4 is melted, the cover member C3 is removed, and the housing part C2 is opened accurately. It is also possible to configure so that C3 is bonded to the main body C1 by a method other than soldering. That is, an adhesive other than solder can be used as the adhesive C4.

  As the substance S, a substance that vaporizes accurately due to abnormal overheating (that is, overheating of the main body C1) such as the terminal 103T of the DC high speed circuit breaker 103 is used. For example, a substance that vaporizes at about 100 ° C. or 200 ° C. is used. It is possible. Further, when the overheat detection capsule C is used in the fire sign detection system 1, the vaporized substance S can be detected by the monitoring device 2 (in the above embodiment, a smoke detector). It is considered as a fine particle that is a target for judging that an event that could lead to a fire has occurred.

  Furthermore, when the overheat detection capsule C is actually used in a facility such as the DC cubicle 100 of a DC substation for electric railways, for example, the vaporized substance S is not harmful to the human body, adheres to equipment in the facility, and is short-circuited. As a result of the repeated studies by the present inventors on the substance S that satisfies the requirements of having an insulating property and not having flammability, the above-mentioned substance S is a paraffinic material. The organic matter was found to be good. Of the paraffinic organic substances, normal paraffin is preferable. In addition, for example, alcohol can be used.

  Further, as a method for accommodating the substance S in the accommodating part C2, it is possible to first accommodate the substance S in the accommodating part C2 and to solder the lid member C3 to the main body part C1 in this state. . However, there is a possibility that the substance S is vaporized when the lid member C3 is soldered to the main body C1, and a predetermined amount of the substance S cannot be accommodated in the accommodating part C2.

  Therefore, in the present embodiment, the lid member C3 having a hole is first soldered and bonded to the main body C1. Thereafter, the substance S is accommodated in the accommodating portion C2 through the hole. At that time, if the substance S is in a liquid state, it is poured as it is through the holes, and if the substance S is in a solid state, it is heated to a level where the substance S is not vaporized and poured into a liquid state. Then, the screw C5 is screwed into the hole, and the hole is sealed with the screw C5. In this embodiment, the substance S is accommodated in the accommodating part C2 in this way.

  And by accommodating the substance S in the accommodating part C2 in this way, when the substance S is accommodated in the accommodating part C2, the temperature of the solder C4, the main body part C1, and the lid member C3 has already decreased. Therefore, a predetermined amount of the substance S can be accurately accommodated in the accommodating portion C2 through the hole of the lid member C3 without being vaporized.

[effect]
As described above, according to the overheat detection capsule C according to the present embodiment, the substance S is accommodated in the accommodation portion C2 provided in the main body C1 of the overheat detection capsule C at room temperature. Since the part C2 is sealed with the lid member C3, it does not leak to the outside.

  On the other hand, when a portion where the overheat detection capsule C is disposed (such as the above-mentioned metal conductor portion) such as the portion of the terminal 103T of the DC high speed circuit breaker 103 is overheated, the main body C1 of the overheat detection capsule C is thereby heated. As a result of overheating, the adhesive C4 melts and the lid member C3 moves and comes off, the sealing of the housing portion C2 by the lid member C3 is released, and the housing portion C2 is opened. Therefore, the substance S vaporized by overheating of the main body C1 can be scattered outside.

  Thus, if the overheat detection capsule C according to the present embodiment is disposed in a metal conductor portion that does not produce fine particles such as smoke or odor even if overheated or in the vicinity thereof, such a metal conductor portion, For example, when abnormal overheating occurs due to poor contact or the like, fine particles such as smoke and odor can be generated from the overheat detection capsule C. Therefore, for example, by detecting it with the monitoring device 2 (smoke detector or the like), it is possible to accurately detect the occurrence of abnormal overheating. As described above, when the overheat detection capsule C according to the present embodiment is used, it is possible to accurately assist the abnormal overheat detection processing by the monitoring device 2 described above.

  The size of the overheat detection capsule C is the volume of the space in which the vaporized substance S is scattered (in the example of the DC cubicle 100 (see FIG. 1) of the DC substation for electric railways), Volume), the amount of the substance S accommodated in the accommodating part C2 of the capsule C for overheating detection, based on the concentration of the vaporized substance S necessary for detecting the abnormal overheating by the monitoring device 2, and the accommodating part It is determined by the volume of C2.

  In the present embodiment, as described above, when the portion where the overheat detection capsule C is disposed (the above-described metal conductor portion or the like) is overheated, the main body C1 of the overheat detection capsule C is overheated and bonded. The agent C4 melts and the lid member C3 moves and disengages, and the sealing of the accommodating portion C2 by the lid member C3 is released, and the vaporized substance S is scattered outside.

  In that case, for example, when the adhesive C4 (solder in the present embodiment) melts, the lid member C3 is moved so as to slide downward, whereby the sealing of the housing portion C2 by the lid member C3 is released and the housing is accommodated. It is also possible to configure so that the part C2 is opened.

  Further, when the adhesive C4 is melted, in order to more reliably release the sealing of the housing portion C2 by the lid member C3, as shown in FIGS. 4A and 4B, for example, as shown in FIGS. It is possible to provide a spring C6 that connects the C main body C1 and the lid member C3. If comprised in this way, when the main-body part C1 is overheated and the adhesive agent C4 melts, as shown in FIG. 5, it removes so that the cover member C3 may be jumped off by the elastic force of the spring C6, and a cover member It is also possible to constitute such that the sealing of the housing part C2 by C3 is reliably released.

  At this time, the spring C6 can be a helical spring type (coil spring type) as shown in FIGS. However, although not shown, for example, a leaf spring type spring can be used as the spring C6. When the adhesive C4 is melted, the spring C6 can be accommodated by the lid member C3 due to its elastic force. As long as the sealing of the part C2 can be reliably released, it is not limited to a specific form.

  Further, as in the present embodiment, the lid member C3, the main body C1, and the spring C6 are connected to each other, so that the adhesive C4 is melted and the lid member C3 is splashed off by the elastic force of the spring C6. C3 remains connected to the main body C1 by the spring C6 (see FIG. 5). For this reason, the splashed lid member C3 flies away from the main body C1, causing an accident such as an unnecessary short circuit between the terminals by contacting the terminal 103T of the DC high speed circuit breaker 103, for example. It is also possible to accurately prevent this.

  On the other hand, in the overheat detection capsule C shown in FIGS. 4A and 4B, the inclined surface C7 is provided in the portion of the main body C1 below the housing C2. If comprised in this way, the vaporized substance S will not only scatter directly from the inside of the accommodating part C2 to the outside, but also when the sealing of the accommodating part C2 by the lid member C3 is released, the inclined surface of the main body part C1 from the accommodating part C2 Material S flows out onto C7.

  And since the substance S which flowed out vaporizes on the overheated inclined surface C7, and it will be scattered outside, there exists a merit that it becomes possible to vaporize the substance S more appropriately and to disperse | distribute to external space. is there.

  At that time, the surface C7 of the main body C1 from which the substance S flows out is not an inclined surface as shown in FIGS. 4A and 4B, but a surface extending in the vertical direction, for example, as shown in FIG. It is also possible. In this case, when the lid member C3 is removed, the substance S flows out downward along the surface C7 in the vertical direction.

  On the other hand, as shown in FIGS. 4 (A) and 4 (B), when the surface C7 of the main body C1 from which the substance S flows is an inclined surface, it can be understood by comparing FIG. 4 (B) and FIG. In addition, when the overheat detection capsules C have the same height, the area of the inclined surface C7 is wider than when the surface C7 is a surface extending in the vertical direction (see FIG. 6). The flowing out substance S can be heated and vaporized in a wider area. Therefore, there is an advantage that the substance S can be vaporized more accurately and scattered in the external space.

  Similar to the above-described fire sign detection system 1, the overheat detection capsule C can be applied to, for example, a power plant, a substation, and the like in addition to the DC cubicle 100 of a DC substation for electric railways. For example, there are current flow paths such as switchboards in the facility, and such flow paths may overheat due to abnormalities such as poor contact or short circuit, and do not generate fine particles such as smoke even if overheating occurs. It is possible to apply to such a place.

  Moreover, it goes without saying that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.

1 Fire detection system 2 Smoke detector (monitoring device)
100 DC cubicle (facility)
101T Metal container terminal (current flow path)
103T DC high-speed circuit breaker terminal (current flow path)
C Overheat detection capsule C1 Main body C2 Housing C3 Lid member C4 Adhesive (member bonding the main body and the lid member)
C5 Screw C6 Spring C7 Surface S Material

Claims (9)

A main body having thermal conductivity;
A housing part that is provided in the main body part and that contains a substance that vaporizes when the temperature exceeds a predetermined temperature;
A lid member that is bonded to the main body and seals the housing in a state in which the substance is housed.
The superheated body portion, the only member fusion adhering body portion and with said lid member, when the sealing of the receiving portion by the lid member the lid member is moved is released, superheated The substance vaporized by the heat of the main body part is scattered from the housing part to the outside, and the substance that has flowed out of the housing part onto the surface of the main body part is heated on the surface of the main body part. Capsule for overheating detection, characterized by vaporizing and scattering to the outside . The capsule for overheating detection according to claim 1 , wherein a surface of the main body from which the substance flows out is a surface inclined with respect to a vertical direction. A hole is provided in the lid member,
A sealing member for sealing the hole by being attached to the hole;
The said cover member is bonded to the said main-body part, Then, the said substance is accommodated in the said accommodating part through the said hole, The said hole is sealed with the said sealing member, It is formed, It is characterized by the above-mentioned. The overheat detection capsule according to claim 1 or 2 . A main body having thermal conductivity;
A housing part that is provided in the main body part and that contains a substance that vaporizes when the temperature exceeds a predetermined temperature;
A lid member that is bonded to the main body and seals the housing in a state in which the substance is housed.
A hole is provided in the lid member,
A sealing member for sealing the hole by being attached to the hole;
After the lid member is bonded to the main body portion, the substance is accommodated in the accommodating portion through the hole, and the hole is sealed by the sealing member,
When the body part is overheated and the member that bonds the body part and the lid member melts, the lid member moves to release the sealing of the housing part by the lid member, and the body A capsule for overheating detection, wherein the substance is vaporized and scattered outside by overheating of a part. The capsule for overheat detection according to any one of claims 1 to 4, wherein the substance in a vaporized state is a substance that can be detected by a smoke detector. The overheat detection capsule according to claim 5 , wherein a paraffinic organic substance is used as the substance. The main body and the lid member are made of metal,
The overheat detection capsule according to any one of claims 1 to 6 , wherein the main body and the lid member are bonded together by soldering. A spring connecting the main body and the lid member;
When the main body is overheated and the member that bonds the main body to the lid member melts, the lid member moves due to the elastic force of the spring, and the housing member is sealed by the lid member. The overheat detection capsule according to any one of claims 1 to 7 , wherein the overheat detection capsule is released. In a fire sign detection system that detects the occurrence of an event that can lead to a fire by monitoring particulates in the air at a facility where a cable through which current flows is arranged,
A monitoring device that monitors particulates in the air to determine whether the event has occurred;
Disposed in the flow path or near the current, by the passage from overheating, from claim 1, wherein the monitoring device to scatter the material that is vaporized is particulate for which it is determined that the event has occurred A capsule for overheating detection according to any one of claims 8 and
A fire sign detection system comprising: