JPH0441645U - - Google Patents
Info
- Publication number
- JPH0441645U JPH0441645U JP8288790U JP8288790U JPH0441645U JP H0441645 U JPH0441645 U JP H0441645U JP 8288790 U JP8288790 U JP 8288790U JP 8288790 U JP8288790 U JP 8288790U JP H0441645 U JPH0441645 U JP H0441645U
- Authority
- JP
- Japan
- Prior art keywords
- timer
- pressure sensor
- reset
- bypass pipe
- alarm device
- 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.)
- Granted
Links
- 230000005856 abnormality Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Measuring Volume Flow (AREA)
- Measuring Fluid Pressure (AREA)
- Examining Or Testing Airtightness (AREA)
- Emergency Alarm Devices (AREA)
Description
第１図はこの考案装置の実施例を示す回路図、
第２図は同上の警報回路の拡大図、第３図は同上
の動作波形を示すタイムチヤート、第４図は他の
例を示す回路図である。
１……集団供給装置、２……ＬＰガスボンベ、
３……自動切換調整器、４……主管路、６……オ
リフイス、１０……検知管路、１１……圧力セン
サ、１２……警報回路、１４……リセツト回路、
１５……タイマ、１６……リレー、１７……警報
装置、１８……電源回路、１９……自動通報装置
、２０……電話回線、２１……外部出力。
FIG. 1 is a circuit diagram showing an embodiment of this device;
FIG. 2 is an enlarged view of the alarm circuit same as above, FIG. 3 is a time chart showing operation waveforms of same as above, and FIG. 4 is a circuit diagram showing another example. 1... Collective supply device, 2... LP gas cylinder,
3... Automatic switching regulator, 4... Main pipe, 6... Orifice, 10... Detection pipe, 11... Pressure sensor, 12... Alarm circuit, 14... Reset circuit,
15...Timer, 16...Relay, 17...Alarm device, 18...Power circuit, 19...Automatic notification device, 20...Telephone line, 21...External output.
Claims (1)
路を設け、このバイパス管路にオリフイスを設け
て主管路にガスが流れたときバイパス管路にも必
ずガスが流れるようにするとともに、このバイパ
ス管路には、オリフイスの前後の差圧があらかじ
め設定された圧力以下になつたとき信号を出す圧
力センサを設け、この圧力センサには、リセツト
回路を介してタイマを接続し、圧力センサからの
信号が入力している間はタイマがリセツトされる
ようにし、同タイヤには、あらかじめ設定してあ
る長時間に亘りタイマがリセツトされないときに
のみ、作動して警報装置又は外部出力をＯＮとす
るリレーなどを接続した配管異常警報装置。 A bypass pipe with a small flow rate is installed in the main pipe where a large amount of gas flows, and an orifice is installed in this bypass pipe to ensure that when gas flows into the main pipe, gas also flows into the bypass pipe. The conduit is equipped with a pressure sensor that outputs a signal when the differential pressure before and after the orifice falls below a preset pressure.A timer is connected to this pressure sensor via a reset circuit, and the timer is connected to the pressure sensor. The timer is reset while the signal is being input, and only when the timer is not reset for a preset long period of time, the tire is activated and the alarm device or external output is turned ON. A piping abnormality alarm device connected to a relay, etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8288790U JP2518809Y2 (en) | 1990-08-02 | 1990-08-02 | Piping abnormality alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8288790U JP2518809Y2 (en) | 1990-08-02 | 1990-08-02 | Piping abnormality alarm device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0441645U true JPH0441645U (en) | 1992-04-08 |
| JP2518809Y2 JP2518809Y2 (en) | 1996-11-27 |
Family
ID=31630092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8288790U Expired - Lifetime JP2518809Y2 (en) | 1990-08-02 | 1990-08-02 | Piping abnormality alarm device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2518809Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008082146A (en) * | 2007-01-12 | 2008-04-10 | Kondo Kogyo Kk | Negative pressure monitoring system inside removing work area of asbestos-containing spraying material and/or asbestos-containing material |
| JP2008119555A (en) * | 2006-11-08 | 2008-05-29 | Toda Constr Co Ltd | Negative pressure environmental maintenance system of controlled area |
-
1990
- 1990-08-02 JP JP8288790U patent/JP2518809Y2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008119555A (en) * | 2006-11-08 | 2008-05-29 | Toda Constr Co Ltd | Negative pressure environmental maintenance system of controlled area |
| JP2008082146A (en) * | 2007-01-12 | 2008-04-10 | Kondo Kogyo Kk | Negative pressure monitoring system inside removing work area of asbestos-containing spraying material and/or asbestos-containing material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2518809Y2 (en) | 1996-11-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |