JPH0342541Y2 - - Google Patents
Info
- Publication number
- JPH0342541Y2 JPH0342541Y2 JP1985130058U JP13005885U JPH0342541Y2 JP H0342541 Y2 JPH0342541 Y2 JP H0342541Y2 JP 1985130058 U JP1985130058 U JP 1985130058U JP 13005885 U JP13005885 U JP 13005885U JP H0342541 Y2 JPH0342541 Y2 JP H0342541Y2
- Authority
- JP
- Japan
- Prior art keywords
- line
- fire
- heater
- relay
- disconnection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Fire-Detection Mechanisms (AREA)
- Fire Alarms (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は、火災報知装置に関し、特に洞道内
に設置される除湿用加熱ヒーターを備えた火災報
知装置の線路監視回路の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a fire alarm system, and more particularly to an improvement in the track monitoring circuit of a fire alarm system equipped with a dehumidifying heater installed in a tunnel.
洞道用火災感知器としては、感知器本体周囲に
除湿用加熱ヒーターを設けたものが実公昭58−
25512号として知られているが、このような火災
報知装置のヒーター線路と、感知器線路のいずれ
をも簡単な回路構成によつて断線を検出するよう
にしたものは知られていなかつた。
As a fire detector for tunnels, one equipped with a dehumidifying heater around the detector body was introduced in 1983.
Although it is known as No. 25512, there is no known fire alarm system that detects disconnection of either the heater line or the sensor line using a simple circuit configuration.
洞道内に設置される火災感知器は、高湿度環境
に基づく誤発報を防止する為、その要部を加熱し
て除湿する加熱ヒーターが設けられ、この加熱ヒ
ーター用線路と、感知器線路は、それぞれ個別の
線路となつている。すなわち、ヒーター線路は、
その性質上比較的粗悪で大容量の電源に接続さ
れ、信号兼給電線からなる一般の感知器線路とは
異なる電源に接続されている。このような２系統
の線路の断線検出は、通常各系統別に断線検出回
路を設ける必要があつた。
Fire detectors installed in tunnels are equipped with heaters that heat and dehumidify the main parts of the fire detectors in order to prevent false alarms due to high humidity environments. , each line is a separate track. In other words, the heater line is
Due to its nature, it is connected to a relatively inferior and large-capacity power supply, and is connected to a different power supply from the general sensor line, which is made up of signal and power supply lines. In order to detect a disconnection between two lines, it is usually necessary to provide a separate disconnection detection circuit for each line.
この考案の洞道火災報知装置は、火災感知器か
らの動作信号に基づいて火災警報を発する火災受
信機と、上記火災感知器が並列に接続され上記火
災受信機から伸びた感知器線路と、該感知器線路
の終端部に接続された終端器と、上記火災受信機
には該終端器に基づいて上記感知器線路の断線を
検出する断線検出回路と、上記火災感知器の要部
を除湿するための加熱用ヒーターと、一端から電
源が供給されて上記加熱用ヒーターが並列に接続
されたヒーター線路と、該ヒーター線路の終端部
に設けられ通電時に閉路される接点を有する継電
器とを具備し、該継電器の接点を上記終端器に直
列に接続し上記ヒーター線路の断線を上記感知器
線路の断線検出回路により検出したことを特徴と
したものである。
The tunnel fire alarm system of this invention includes: a fire receiver that issues a fire alarm based on an operating signal from the fire detector; a sensor line extending from the fire receiver to which the fire detectors are connected in parallel; A terminator connected to the end of the detector line, a disconnection detection circuit in the fire receiver that detects a disconnection in the detector line based on the terminator, and a dehumidifier for the main part of the fire detector. A heater line for heating, a heater line to which power is supplied from one end and the heating heater is connected in parallel, and a relay having a contact that is provided at the end of the heater line and is closed when energized. A contact point of the relay is connected in series to the terminator, and a disconnection of the heater line is detected by a disconnection detection circuit of the sensor line.
次にこの考案の一実施例を示す図面をもとに詳
細に説明する。
Next, an embodiment of this invention will be explained in detail based on the drawings.
図において、火災受信機１には、電源２と、該
電源２に直列に接続された高感度リレー４および
低感度リレー５の直列回路を備え、この直列回路
の他端と電源負端子からは、感知器線路L2が伸
びている。 In the figure, a fire receiver 1 includes a power supply 2, and a series circuit of a high sensitivity relay 4 and a low sensitivity relay 5 connected in series to the power supply 2, and the other end of the series circuit and the negative terminal of the power supply are , the sensor line L 2 is extended.
火災受信機１より伸びた感知器線路L2には、
複数個の火災感知器Ｄが接続され、その終端部に
は終端抵抗７から成る終端器と後述する継電器６
の接点との直列回路が接続されている。 Detector line L 2 extending from fire receiver 1 includes:
A plurality of fire detectors D are connected to each other, and a terminator consisting of a terminating resistor 7 and a relay 6, which will be described later, are connected to each other.
A series circuit with the contacts is connected.
さらに、各火災感知器Ｄの内部あるいはその近
傍には、除湿用のヒーターＨが設けられ、このヒ
ーターＨの両端は電源３より伸びたヒーター線路
L1にそれぞれ接続されている。さらにヒーター
線路L1の終端部には、継電器６が接続され、そ
の常開接点が前述の終端抵抗７と直列に接続され
ている。 Furthermore, a dehumidifying heater H is provided inside or near each fire detector D, and both ends of this heater H are connected to heater lines extending from the power source 3.
connected to L 1 respectively. Further, a relay 6 is connected to the terminal end of the heater line L 1 , and its normally open contact is connected in series with the above-mentioned terminating resistor 7 .
ヒーターＨの電源３は、交流あるいは直流いず
れでも良いがこの実施例においては交流を用いた
ものを示す。また火災受信機１の高感度リレー４
は終端抵抗７に流れる電流によつて通常作動状態
にあり、また低感度リレー５は、火災感知器Ｄの
動作に基づいて作動されるものとする。 The power source 3 of the heater H may be either alternating current or direct current, but in this embodiment, an alternating current source is used. Also, the high sensitivity relay 4 of the fire receiver 1
is in a normal operating state due to the current flowing through the terminating resistor 7, and the low sensitivity relay 5 is assumed to be activated based on the operation of the fire detector D.
このような回路構成における動作を次に述べ
る。 The operation of such a circuit configuration will be described next.
通常、ヒーター線路L1に接続された加熱用ヒ
ーターＨによつて、火災感知器Ｄの要部は加熱さ
れており、かつヒーター線路L1の終端部に接続
された継電器６は、動作状態を保持し、その接点
を閉路している。 Normally, the main parts of the fire detector D are heated by the heater H connected to the heater line L1 , and the relay 6 connected to the terminal end of the heater line L1 changes the operating state. The contact is closed.
火災受信機１に有する高感度リレー４は、電源
２より低感度リレー５、感知器線路L2、継電器
６の接点、終端抵抗７から成る閉回路を流れる電
流によつて通常作動状態にある。 The high-sensitivity relay 4 included in the fire receiver 1 is normally activated by a current flowing from the power source 2 through a closed circuit consisting of the low-sensitivity relay 5, the sensor line L 2 , the contacts of the relay 6, and the terminating resistor 7.
いずれかの火災感知器Ｄが作動すると、火災感
知器Ｄ内のSCRが導通されて線路L2が短絡状態
となつて低感度リレー５が作動し、図示しない警
報器等を鳴動させて発報する。 When one of the fire detectors D is activated, the SCR in the fire detector D becomes conductive, the line L2 becomes short-circuited, the low sensitivity relay 5 is activated, and an alarm, etc. (not shown) is activated to issue an alarm. do.
ヒーター線路L1が断線すると、継電器６が復
旧され、その接点を開放し、その結果、終端抵抗
７へ流れる電流がしや断され、高感度リレー４は
復旧する。高感度リレー４の復旧によつて図示し
ない断線警報器を鳴動させる。 When the heater line L1 is disconnected, the relay 6 is restored and its contacts are opened, and as a result, the current flowing to the terminating resistor 7 is interrupted, and the high-sensitivity relay 4 is restored. When the high-sensitivity relay 4 is restored, a disconnection alarm (not shown) is sounded.
感知器線路L2が断線すると、終端抵抗７へ流
れる電流がしや断され、上記と同様に図示しない
断線警報器が鳴動される。したがつて、ヒーター
線路L1、感知器線路L2のいずれの断線について
も火災受信機１内の単一の断線検出器である高感
度リレー４によつて検出される。 When the sensor line L2 is disconnected, the current flowing to the terminating resistor 7 is interrupted, and a disconnection alarm (not shown) is sounded in the same way as described above. Therefore, any disconnection in the heater line L 1 or the sensor line L 2 is detected by the high-sensitivity relay 4 which is a single disconnection detector in the fire receiver 1 .
なお、リレー４，５は電子回路を用いて構成す
ることもでき、いわゆる極く一般的に使用されて
いる火災受信機の断線および火災検出回路を用い
れば良く、また終端器は抵抗７に限定されるもの
でなく、終端器にコンデンサー、定電圧ダイオー
ド等を用いた場合のように、感知器線路の終端に
終端器を接続し断線時に受信機側の感知器線路の
電気的な変化（監視電流・監視電圧）を捕らえて
断線を検出する断線検出回路であればよい。 Note that the relays 4 and 5 can be constructed using electronic circuits, so-called disconnection and fire detection circuits of fire receivers that are very commonly used may be used, and the terminator is limited to resistor 7. Rather than using a capacitor, constant voltage diode, etc. as a terminator, a terminator is connected to the end of the sensor line to monitor electrical changes (monitoring) in the sensor line on the receiver side in the event of a disconnection. Any disconnection detection circuit that detects a disconnection by detecting current or monitoring voltage may be used.
上述のように、この考案はヒーター加熱用電源
の如く、比較的粗悪な電源供給線路と、火災感知
器線路が並設される洞道用火災報知装置におい
て、比較的接続負荷に影響されないヒーター線路
の終端に継電器を設け、その接点を感知器線路の
終端器と直列に接続することで全ての線路の断線
を火災受信機に有する通常一般に用いられている
断線検出回路で検出できる特徴を有する。
As mentioned above, this invention is a heater line that is relatively unaffected by the connected load in a fire alarm system for a tunnel in which a relatively inferior power supply line such as a heater heating power supply line and a fire detector line are installed in parallel. By installing a relay at the end of the line and connecting its contacts in series with the terminator of the sensor line, all line breaks can be detected by the commonly used break detection circuit in the fire receiver.
図は、この考案の洞道用火災報知装置の一実施
例を示す回路図である。
１……火災受信機、Ｄ……火災感知器、Ｈ……
ヒーター、L1……ヒーター線路、L2……感知器
線路、６……継電器。
The figure is a circuit diagram showing an embodiment of the fire alarm system for tunnels of this invention. 1... Fire receiver, D... Fire detector, H...
Heater, L1 ...Heater line, L2 ...Sensor line, 6...Relay.
Claims (1)
を発する火災受信機と、上記火災感知器が並列に
接続され上記火災受信機から伸びた感知器線路
と、該感知器線路の終端部に接続された終端器
と、上記火災受信機には該終端器に基づいて上記
感知器線路の断線を検出する断線検出回路と、上
記火災感知器の要部を除湿するための加熱用ヒー
ターと、一端から電源が供給されて上記加熱用ヒ
ーターが並列に接続されたヒーター線路と、該ヒ
ーター線路の終端部に設けられ通電時に閉路され
る接点を有する継電器とを具備し、該継電器の接
点を上記終端器に直列に接続し上記ヒーター線路
の断線を上記感知器線路の断線検出回路により検
出したことを特徴とする洞道用火災報知装置。 A fire receiver that issues a fire alarm based on an operating signal from the fire detector, a sensor line in which the fire detector is connected in parallel and extends from the fire receiver, and a sensor line that is connected to the terminal end of the sensor line. a termination device, a disconnection detection circuit in the fire receiver for detecting disconnection of the sensor line based on the termination device, a heating heater for dehumidifying the main part of the fire detector, The heater line is provided with a heater line to which power is supplied and the heating heater is connected in parallel, and a relay having a contact that is provided at the terminal end of the heater line and is closed when energized, and the contact of the relay is connected to the terminator. A fire alarm system for a tunnel, characterized in that a disconnection of the heater line is detected by a disconnection detection circuit of the sensor line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985130058U JPH0342541Y2 (en) | 1985-08-28 | 1985-08-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985130058U JPH0342541Y2 (en) | 1985-08-28 | 1985-08-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6240686U JPS6240686U (en) | 1987-03-11 |
| JPH0342541Y2 true JPH0342541Y2 (en) | 1991-09-05 |
Family
ID=31027196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985130058U Expired JPH0342541Y2 (en) | 1985-08-28 | 1985-08-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0342541Y2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5161297A (en) * | 1974-11-26 | 1976-05-27 | Nippon Keibi Hosho Kk | KEIBISHI SUTEMU |
| JPS5194079A (en) * | 1975-02-15 | 1976-08-18 | ||
| JPS5360599A (en) * | 1976-11-12 | 1978-05-31 | Hitachi Ltd | Heat type fire detector having opration checking function of heat detector |
| JPS5368100A (en) * | 1976-11-30 | 1978-06-17 | Hitachi Ltd | Thermal fire alarm device |
| JPS5369598A (en) * | 1976-12-03 | 1978-06-21 | Hitachi Ltd | Thermal type fire alarm unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58195388U (en) * | 1982-06-23 | 1983-12-26 | 株式会社日立製作所 | Heat detector with operational test equipment |
| JPS5970291U (en) * | 1982-10-29 | 1984-05-12 | トヨタ自動車株式会社 | Self-heating fire detector |
-
1985
- 1985-08-28 JP JP1985130058U patent/JPH0342541Y2/ja not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5161297A (en) * | 1974-11-26 | 1976-05-27 | Nippon Keibi Hosho Kk | KEIBISHI SUTEMU |
| JPS5194079A (en) * | 1975-02-15 | 1976-08-18 | ||
| JPS5360599A (en) * | 1976-11-12 | 1978-05-31 | Hitachi Ltd | Heat type fire detector having opration checking function of heat detector |
| JPS5368100A (en) * | 1976-11-30 | 1978-06-17 | Hitachi Ltd | Thermal fire alarm device |
| JPS5369598A (en) * | 1976-12-03 | 1978-06-21 | Hitachi Ltd | Thermal type fire alarm unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6240686U (en) | 1987-03-11 |
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