JP2502840Y2 - Pipe leak detector - Google Patents
Pipe leak detectorInfo
- Publication number
- JP2502840Y2 JP2502840Y2 JP1989047329U JP4732989U JP2502840Y2 JP 2502840 Y2 JP2502840 Y2 JP 2502840Y2 JP 1989047329 U JP1989047329 U JP 1989047329U JP 4732989 U JP4732989 U JP 4732989U JP 2502840 Y2 JP2502840 Y2 JP 2502840Y2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- pressure
- pressure regulator
- small
- flow
- 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 - Fee Related
Links
Landscapes
- Measuring Volume Flow (AREA)
- Examining Or Testing Airtightness (AREA)
- Emergency Alarm Devices (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は、例えば複数のLPガスボンベからなる集団
供給装置から各家庭へガスを供給する設備などに用いる
配管漏洩検知装置に関するものである。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pipe leakage detection device used in equipment for supplying gas to each home from a collective supply device including a plurality of LP gas cylinders, for example.
第５図は各家庭にLPガスボンベ１を設置した場合で、
ガスボンベ１から家庭２のガス器具にガスを供給する管
路３の途中に圧力調整器４および市販の家庭用の小型漏
洩検知機能付ガスメータ５を設けたものである。Figure 5 shows the case where LP gas cylinder 1 is installed in each home.
A pressure regulator 4 and a commercially available small gas meter 5 with a leak detection function for home use are provided in the middle of a pipeline 3 for supplying gas from a gas cylinder 1 to a gas appliance in a home 2.
また第６図に示すものは複数のLPガスボンベ１と、複
数の圧力調整器R1、R2、R3を組合せた自動切換調整器８
からなる集団供給装置10に通じる主管路11に各家庭２毎
に分岐した管路12を接続したもので、小型漏洩検知機能
付ガスメータ５は各管路12毎に取付けてある。Further, the one shown in FIG. 6 is an automatic switching regulator 8 in which a plurality of LP gas cylinders 1 and a plurality of pressure regulators R 1 , R 2 and R 3 are combined.
The main conduit 11 leading to the collective supply device 10 is connected to the branched conduit 12 for each home 2, and the small leak-detecting gas meter 5 is attached to each conduit 12.
ここで、圧力調整器４は、弁の開閉により、下流側が
設定圧より低圧ならばガスを流通させて供給し、一方下
流側が設定圧になればガス流通を停止させる作用を行な
って、供給するガス圧（出口圧力）を一定に保つ働きを
するものである。Here, the pressure regulator 4 operates by opening and closing the valve to circulate and supply the gas if the downstream side has a lower pressure than the set pressure, and on the other hand, performs the action of stopping the gas flow when the downstream side reaches the set pressure and supplies the gas. It serves to keep the gas pressure (outlet pressure) constant.
また、小型漏洩検知機能付ガスメータ５は、小流量の
配管の漏洩検知に使用され、流量センサ、マイコン制御
部および異常表示装置を備え、一定の時間（通常30日
間）、ガス流れが停止しない場合、漏洩の疑いがあるこ
とを表示等の手段で警報する機能を有する、非常に有効
なものである。In addition, the gas meter 5 with a small leak detection function is used to detect leaks in pipes with a small flow rate, and is equipped with a flow rate sensor, a microcomputer control unit, and an abnormality display device, and when the gas flow does not stop for a fixed time (usually 30 days). It has a function of warning by means of display etc. that there is a suspicion of leakage, which is very effective.
上記小型漏洩検知機能付ガスメータ５は上述のように
小流量用のため、上記従来例のうち、第５図に示すもの
は各家庭２毎に独立したものであり、その流量も少ない
から問題はないが、第６図のものは、その主管路11は大
流量のため、小型漏洩検知機能付ガスメータ５を取付け
ても漏洩が検知できない。Since the small gas meter 5 with a leak detection function is used for small flow rates as described above, the conventional example shown in FIG. 5 is independent for each home 2 and its flow rate is small, which causes a problem. Although not shown in FIG. 6, since the main pipe line 11 has a large flow rate, even if the gas meter 5 with the small leak detection function is attached, the leak cannot be detected.
すなわち、主管路11の流量は大きく、その大流量に対
して漏洩量は極めて少ないため、上記小型漏洩検知機能
付ガスメータ５を取付けても確実に検知し得ず、漏洩を
検知するためには大容量型漏洩検知機能付ガスメータが
必要である。しかし、このようなガスメータは現在では
商品化されておらず、また、今後商品化されたとしても
非常に高価なものとなる。That is, since the flow rate of the main pipeline 11 is large and the leak rate is extremely small compared to the large flow rate, even if the small gas meter 5 with the leak detection function is attached, it cannot be reliably detected, and the leak is large to detect the leak. A gas meter with a capacitive leak detection function is required. However, such a gas meter is not currently commercialized, and even if it is commercialized in the future, it will be very expensive.
この考案の課題は、上記の実情の下、流量の大きい主
管路のガス漏洩を家庭用の小型漏洩検知機能付ガスメー
タにより検知し得るようにすることにある。SUMMARY OF THE INVENTION Under the above circumstances, it is an object of the present invention to make it possible to detect a gas leak in a main pipeline having a large flow rate by a household gas meter with a leak detecting function.
上記の課題を解決するために、この考案にあっては、
大量のガスを流す主管路に設けた圧力調整器に小流量の
バイパス管路を設け、このバイパス管路に、前記圧力調
整器より出口圧力を少し高く設定した小型圧力調整器、
及び一定期間ガス流れが停止しないときに漏洩している
と判断して表示する小型漏洩検知機能付ガスメータを取
付けた構成の配管漏洩検知装置としたのである。In order to solve the above-mentioned problems, in this invention,
A small flow regulator is provided in the pressure regulator provided in the main pipeline for flowing a large amount of gas, and a small pressure regulator in which the outlet pressure is set slightly higher than the pressure regulator in the bypass pipeline,
In addition, the pipe leak detection device has a configuration in which a small gas meter with a leak detection function, which indicates that gas is leaking when the gas flow does not stop for a certain period of time, is displayed.
この考案は上記の構成であり、主管路の圧力調整器の
設定圧力により、バイパス管路の小型圧力調整器の設定
圧力が高くしてあるため、主管路を流れる大量のガスの
一部は必ずバイパス管路を流れている。このため、この
状態では、小型漏洩検知機能付ガスメータはガス流れを
検出している。The present invention has the above-mentioned configuration, and since the set pressure of the small pressure regulator of the bypass pipeline is set high by the set pressure of the pressure regulator of the main pipeline, a part of a large amount of gas flowing in the main pipeline must be installed. It flows through the bypass line. Therefore, in this state, the gas meter with the small leak detection function detects the gas flow.
したがって、ガスが使用されている間は、ガスメータ
は、ガス流れを検出しており、ガス器具の使用がなくな
ると、主管路内のガス圧は徐々に上昇し、そのガス圧が
圧力調整器の設定圧力より高くなると（同圧になる
と）、圧力調整器にはガスは流れなくなる。一方、小型
圧力調整器の圧力設定は前記圧力調整器の出口圧力より
少し高く設定されているため、主管路の圧力調整器にガ
スが流れなくなっても、流れつづけ、その設定圧力より
高くなった時点（同一となった時点）で小型圧力調整
器、すなわち、バイパス管のガス流れも停止する。この
ため、ガスメータはそのガス流れの停止を検出する。こ
のガス流れの停止が生じることは漏洩が生じていないこ
とであり、ガスメータは警報動作は行わない。Therefore, while the gas is used, the gas meter is detecting the gas flow, and when the gas appliance is no longer used, the gas pressure in the main pipeline gradually rises, and the gas pressure of the pressure regulator is increased. When the pressure becomes higher than the set pressure (at the same pressure), no gas flows in the pressure regulator. On the other hand, since the pressure setting of the small pressure regulator is set slightly higher than the outlet pressure of the pressure regulator, even if the gas stops flowing to the pressure regulator of the main pipeline, it continues to flow and becomes higher than the set pressure. At the time point (the same time point), the gas flow in the small pressure regulator, that is, the bypass pipe is also stopped. Therefore, the gas meter detects the stop of the gas flow. This gas flow stop means that no leak has occurred, and the gas meter does not perform an alarm operation.
ところが、ガス器具の使用がなくなり、主管路の大量
のガス流れが停止しても、主管路にガス漏洩が生じてい
ると、通常、その漏洩量は主管路の大流量に比べて極め
て少ないため、主管路の圧力には大きな影響もなく、主
管路のガス圧は圧力調整器の設定圧力に達してその圧力
調整器のガス流れは停止されるが、小型圧力調整器は、
主管路の圧力調整器の設定圧力よりその設定圧が高いた
め、ガスは流れつづけ、バイパス管路は小流量のため、
漏洩によっても顕著な流れが生じる。However, even if the gas appliances are no longer used and a large amount of gas flow in the main pipeline stops, if there is gas leakage in the main pipeline, the amount of leakage is usually extremely small compared to the large flow rate in the main pipeline. , The pressure of the main pipeline is not greatly affected, and the gas pressure of the main pipeline reaches the set pressure of the pressure regulator and the gas flow of the pressure regulator is stopped, but the small pressure regulator
Since the set pressure is higher than the set pressure of the pressure regulator of the main pipeline, gas continues to flow, and the bypass pipeline has a small flow rate,
Leakage also causes significant flow.
このため、ガスメータはそのガス流れを検出することと
なる。すなわち、ガス漏洩が生じていれば、ガスの使用
がなくなっても、ガスメータはガス流れを検出すること
となり、その連続検出期間が、例えば30日間続けば、ガ
ス漏洩として警報を発するなどの表示を行う。Therefore, the gas meter detects the gas flow. That is, if there is a gas leak, the gas meter will detect the gas flow even if the gas is no longer used, and if the continuous detection period continues for 30 days, for example, an alarm will be issued as a gas leak. To do.
第１図に示す実施例の場合、主管路11に二次用圧力調
整器R3をバイパスするバイパス管路13を設ける。In the case of the embodiment shown in FIG. 1, the main pipeline 11 is provided with a bypass pipeline 13 that bypasses the secondary pressure regulator R 3 .
そして、上記バイパス管路13に小型圧力調整器14およ
び前記の小型漏洩検知機能付ガスメータ５を設ける。Then, the bypass pipe 13 is provided with the small pressure regulator 14 and the gas meter 5 with the small leak detection function.
実施例に用いたガスメータ５は高圧ガス保安協会が定
める基準に合格してマイコンメータIIとして市販してい
るもので、メータ上部に内蔵されているマイクロコンピ
ュータがガスの流量をチェックして、異常時に、例え
ば、30日間ガス流れが連続した場合、ガスを遮断した
り、警報を発したりするものである。The gas meter 5 used in the embodiment is a commercially available microcomputer meter II that has passed the standards set by the High Pressure Gas Safety Association, and the microcomputer incorporated in the upper part of the meter checks the gas flow rate and detects abnormalities. For example, when the gas flow is continuous for 30 days, the gas is shut off or an alarm is issued.
また、上記小型圧力調整器14の出口圧力設定を主管路
11の二次用圧力調整器R3の出口圧力設定より少し高くし
て主管路11にガスが流れるときはバイパス管路13にも必
ずガスが流れるようにする。Also, set the outlet pressure of the compact pressure regulator 14 to the main pipeline.
The outlet pressure of the secondary pressure regulator R 3 of 11 is set to be slightly higher so that when the gas flows through the main pipeline 11, the gas always flows through the bypass pipeline 13.
したがって、ガスが使用されて、主管路11内をガスが
流れると、その一部が必ずバイパス管路13にも流れ、ガ
スメータ５はその流れを検出する。Therefore, when the gas is used and the gas flows in the main pipeline 11, a part of the gas always flows in the bypass pipeline 13, and the gas meter 5 detects the flow.
次に、ガス器具の使用がなくなると、主管路11内のガ
ス圧は徐々に上昇し、そのガス圧が圧力調整器R3の設定
圧力より高くなると、圧力調整器R3にはガスは流れなく
なる。一方、小型圧力調整器14は、その出口圧力が前記
圧力調整器R3の出口圧力より少し高く設定されているた
め、圧力調整器R3のガス流れがなくなっても、流れつづ
け、主管路11のガス圧がその設定圧力より高くなった時
点で、小型圧力調整器14にガスが流れなくなり、バイパ
ス管13のガス流れが停止する。このため、ガスメータ５
はそのガス流れの停止を検出する。このガス流れの停止
が生じることは漏洩が生じていないことであり、ガスメ
ータは警報動作は行わない。Next, when the use of gas appliance is eliminated, the gas pressure in the main line 11 gradually rises and the gas pressure is higher than the set pressure of the pressure regulator R 3, gas pressure regulator R 3 flows Disappear. On the other hand, a small pressure regulator 14, since the outlet pressure is set slightly higher than the outlet pressure of the pressure regulator R 3, even run out of gas flow of the pressure regulator R 3, continued flow, main line 11 When the gas pressure of (1) becomes higher than the set pressure, the gas stops flowing to the small pressure regulator (14), and the gas flow of the bypass pipe (13) is stopped. Therefore, the gas meter 5
Detects the termination of the gas flow. This gas flow stop means that no leak has occurred, and the gas meter does not perform an alarm operation.
ところが、ガス器具の使用がなくなり、主管路11の大
量のガス流れが停止しても、主管路11にガス漏洩が生じ
ていると、通常、その漏洩量は主管路の大流量に比べて
極めて少ないため、主管路の圧力には大きな影響もな
く、主管路のガス圧は圧力調整器R3の設定圧力に達して
圧力調整器R3のガス流れは停止されるが、小型圧力調整
器14は、圧力調整器R3の設定圧力よりその設定圧が高い
ため、ガスは流れつづけ、バイパス管路13は小流量のた
め、漏洩によっても顕著な流れが生じる。このため、ガ
スメータ５はそのガス流れを検出することとなる。すな
わち、ガス漏洩が生じていれば、ガスの使用がなくなっ
ても、ガスメータ５はガス流れを検出することとなり、
その連続検出期間が、例えば30日間続けば、ガス漏洩と
して警報を発する。However, even if the gas appliances are no longer used and a large amount of gas flow in the main pipeline 11 is stopped, if gas leakage occurs in the main pipeline 11, the amount of leakage is usually much higher than the large flow rate in the main pipeline. small order, no major effect on the pressure in the main conduit, the gas pressure in the main line is the gas flow of the pressure regulator R 3 reaches the set pressure of the pressure regulator R 3 is stopped, miniature pressure regulator 14 Since the set pressure is higher than the set pressure of the pressure regulator R 3 , the gas continues to flow, and the bypass pipe 13 has a small flow rate, so that a remarkable flow is generated even by leakage. Therefore, the gas meter 5 detects the gas flow. That is, if a gas leak occurs, the gas meter 5 will detect the gas flow even if the gas is no longer used.
If the continuous detection period continues for 30 days, for example, an alarm is issued as a gas leak.
なお、ガスメータ５はその容量以上のガスが流れる
と、ガス遮断する機能が付加されているが、異常な流れ
が生じて故障する場合もあるため、第２図のようにバイ
パス管路13にオリフィス15を設けて管路13に流れるガス
量を制限し、異常な大容量のガスが流れないようにする
ことが好ましい。The gas meter 5 has a function of shutting off the gas when a gas having a capacity larger than the capacity is added, but there is a case where an abnormal flow occurs and the gas meter 5 may malfunction. Therefore, as shown in FIG. It is preferable to provide 15 to limit the amount of gas flowing in the conduit 13 so that an abnormally large volume of gas does not flow.
また、第３図のように一次圧力調整器R1、R2を短絡す
るバイパス管路16を設け、このバイパス管路16と主管路
11との間にバイパス管路13を設ける場合もある。Further, as shown in FIG. 3, a bypass conduit 16 that short-circuits the primary pressure regulators R 1 and R 2 is provided, and the bypass conduit 16 and the main conduit
A bypass line 13 may be provided between the line 11 and the line 11.
第４図は二次圧力調整器R3の上流側にベーパライザ17
を設けたもので、その下流側の主管路11にバイパス管路
13を設ける。Fig. 4 shows a vaporizer 17 on the upstream side of the secondary pressure regulator R 3.
The main pipeline 11 on the downstream side is provided with a bypass pipeline.
13 will be provided.
上記何れの場合も他の回路構成及び作用は第１図の実
施例と同じである。In any of the above cases, the other circuit configuration and operation are the same as those of the embodiment shown in FIG.
この考案は、以上のように構成し、大量のガスが流れ
る主管路の漏洩を小型漏洩検知機能付ガスメータによっ
て検知ができるようにしたので、きわめて経済的であ
る。The present invention is extremely economical because it is configured as described above and the leak of the main pipeline through which a large amount of gas flows can be detected by the gas meter with the small leak detection function.
第１図乃至第４図はこの考案に係る配管漏洩検知装置の
各実施例の配管図、第５図、第６図は従来の装置の配管
図である。 １……LPガスボンベ、５……小型漏洩検知機能付ガスメ
ータ、８……自動切換調整器、10……集団供給装置、11
……主管路、13、16……バイパス管路、14……小型圧力
調整器、R1、R2、R3……圧力調整器。1 to 4 are piping diagrams of respective embodiments of the pipe leakage detection device according to the present invention, and FIGS. 5 and 6 are piping diagrams of a conventional device. 1 …… LP gas cylinder, 5 …… Compact gas meter with leak detection function, 8 …… Automatic switching regulator, 10 …… Group supply device, 11
...... Main pipeline, 13, 16 …… Bypass pipeline, 14 …… Small pressure regulator, R 1 , R 2 , R 3 …… Pressure regulator.
Claims (1)
器に小流量のバイパス管路を設け、このバイパス管路
に、前記圧力調整器より出口圧力を少し高く設定した小
型圧力調整器、及び一定期間ガス流れが停止しないとき
に漏洩していると判断して表示する小型漏洩検知機能付
ガスメータを取付けた配管漏洩検知装置。1. A small pressure regulator in which a small flow rate bypass pipeline is provided in a pressure regulator provided in a main pipeline for flowing a large amount of gas, and the outlet pressure is set to be slightly higher than the pressure regulator in the bypass pipeline. , And a pipe leak detection device equipped with a small gas meter with a leak detection function that indicates that gas is leaking when the gas flow has not stopped for a certain period of time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989047329U JP2502840Y2 (en) | 1989-04-21 | 1989-04-21 | Pipe leak detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989047329U JP2502840Y2 (en) | 1989-04-21 | 1989-04-21 | Pipe leak detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02140343U JPH02140343U (en) | 1990-11-22 |
| JP2502840Y2 true JP2502840Y2 (en) | 1996-06-26 |
Family
ID=31563162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989047329U Expired - Fee Related JP2502840Y2 (en) | 1989-04-21 | 1989-04-21 | Pipe leak detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2502840Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466395U (en) * | 1990-10-22 | 1992-06-11 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2587108B2 (en) * | 1989-07-07 | 1997-03-05 | 矢崎総業株式会社 | Gas flow leak monitoring system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142747U (en) * | 1983-03-14 | 1984-09-25 | 住友金属工業株式会社 | Piping water leak detection device |
| JPS6262239A (en) * | 1985-09-11 | 1987-03-18 | Kimura Giken:Kk | Water leakage monitoring system |
-
1989
- 1989-04-21 JP JP1989047329U patent/JP2502840Y2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0466395U (en) * | 1990-10-22 | 1992-06-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02140343U (en) | 1990-11-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |