JPH0417887Y2 - - Google Patents
Info
- Publication number
- JPH0417887Y2 JPH0417887Y2 JP1984033915U JP3391584U JPH0417887Y2 JP H0417887 Y2 JPH0417887 Y2 JP H0417887Y2 JP 1984033915 U JP1984033915 U JP 1984033915U JP 3391584 U JP3391584 U JP 3391584U JP H0417887 Y2 JPH0417887 Y2 JP H0417887Y2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pipe
- water
- water pressure
- opening
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 107
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000002265 prevention Effects 0.000 claims description 6
- 239000003651 drinking water Substances 0.000 description 7
- 235000020188 drinking water Nutrition 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Landscapes
- Safety Valves (AREA)
- Pipeline Systems (AREA)
- Control Of Fluid Pressure (AREA)
Description
【考案の詳細な説明】
〔考案の技術分野〕
この考案は地震等によつて送水管路が破断した
ような場合に、この管路破断部からの管路内への
汚水流入を自動的に防止し、或いは管路破断部か
らの外部への水流出を自動的に防止する送水管路
の流出入防止装置に関するものである。[Detailed explanation of the invention] [Technical field of the invention] This invention automatically prevents sewage from flowing into the pipe from the broken part in the event that a water supply pipe breaks due to an earthquake or the like. The present invention relates to an outflow/inflow prevention device for a water supply pipe that automatically prevents water from flowing out from a broken part of the pipe.
送水管路１に直結された地下埋設式の飲料貯水
槽２は該貯水槽２への送水流入側管路１Ａ及び流
出側管路１Ｂが地震等で破断すると、この管路破
断部から汚水が飲料貯水槽２に浸入する問題があ
るので、前記流入側管路１Ａと流出側管路１Ｂの
貯水槽近くに、地震の震度を感知し、或いは前記
送水管路１の流量又は流速を感知して、管路遮断
を行なう管路開閉弁３，３が第１図のように組込
まれている。
In the underground drinking water storage tank 2 directly connected to the water supply pipe 1, if the inflow pipe 1A and the outflow pipe 1B leading to the water tank 2 break due to an earthquake or the like, sewage will flow from the broken part of the pipe. Since there is a problem of infiltration into the drinking water storage tank 2, there is a method to detect the seismic intensity of the earthquake or to sense the flow rate or flow velocity of the water supply pipe 1 near the water storage tank of the inflow side pipe 1A and the outflow side pipe 1B. Pipe opening/closing valves 3, 3 for shutting off the pipe are incorporated as shown in FIG.
しかしながら、前記管路開閉弁３，３が地震感
知により作動するものである場合には管路が破断
しない通水可能状態でも、設定震度になれば自動
的に管路遮断してしまうという問題があり、また
前記管路開閉弁３，３が流量又は流速を感知して
て動するものである場合には夜間等水の使用量が
減じた時に作動し、管路遮断してしまう恐れがあ
る。そこで、このような問題を解消するため、送
水圧力の異常低下を圧力検出器で感知して管路遮
断する方式もあるが、この場合は圧力検出信号を
電気信号に変換して弁開閉作動装置を開閉作動さ
せるようになつているので、地震発生により電気
が切れた時には機能しない問題がある。 However, when the pipe opening/closing valves 3, 3 are activated by earthquake detection, there is a problem that even if the pipe is in a state where water can flow without breakage, the pipe is automatically shut off when the set seismic intensity is reached. In addition, if the pipe opening/closing valves 3, 3 operate by sensing the flow rate or flow velocity, they may operate when the amount of water used decreases, such as at night, and the pipe may be cut off. . To solve this problem, there is a method that uses a pressure detector to detect an abnormal drop in water supply pressure and shut off the pipeline, but in this case, the pressure detection signal is converted to an electrical signal and the valve opening/closing actuator converts the pressure detection signal to an electrical signal. Since the system is designed to open and close, there is a problem that it will not function if the electricity is cut off due to an earthquake.
なお、前記従来例は飲料貯水槽２への管路破断
による汚水流入防止装置として、前記のような管
路開閉弁３，３を貯水槽２への送水流入側管路１
Ａ及び流出側管路１Ｂに設けた場合の問題点につ
いて述べたが、地下埋設式或いは地上配管の送水
管路途中に前記の如き管路開閉弁３を設けて、送
水管路１が地震等で破断したような場合に、送水
管路１の破断部上流側を自動的に遮断し、管路破
断部からの外部への水流出（漏水）を防止する装
置にあつても、前記貯水槽の汚水流入防止装置と
同様な問題が生じる。 In addition, in the conventional example, as a device for preventing sewage from flowing into the drinking water storage tank 2 due to pipe breakage, the pipe opening/closing valves 3, 3 as described above are connected to the water supply inflow side pipe 1 to the water storage tank 2.
As mentioned above, the problems when installing the pipe in the water pipe A and the outflow side pipe 1B are as follows.If the above-mentioned pipe opening/closing valve 3 is installed in the middle of the water pipe, whether it is an underground type or an above-ground pipe, the water pipe 1 is protected against earthquakes, etc. Even if there is a device that automatically shuts off the upstream side of the broken part of the water supply pipe 1 and prevents water from flowing out (leakage) from the broken part of the water pipe to the outside in the case of a break in the water storage tank, A problem similar to that of the sewage inflow prevention device arises.
この考案は前記従来の問題点を解消するために
なされたもので、その目的は送水管路が地震等に
より破断した場合に、送水管路を電気を使用しな
い機械的動作でもつて自動的に遮断して、この管
路破断部からの管路内への汚水流入、或いは管路
破断部からの外部への水流出を自動的に防止する
ようにした送水管路の流出入防止装置を提供する
ことにある。
This idea was made to solve the above-mentioned conventional problems, and its purpose is to automatically shut off the water transmission pipe by mechanical operation without using electricity, in the event that the water transmission pipe is ruptured due to an earthquake, etc. To provide a water supply pipe outflow/inflow prevention device that automatically prevents sewage from flowing into the pipe from a broken part of the pipe, or water from flowing out from the broken part of the pipe to the outside. There is a particular thing.
この考案は前記の目的を達成するために、送水
管路中に設けた管路開閉弁と、入側を送水管路の
開閉弁上流側管路部に接続し出側を管路開閉弁の
開閉作動装置に接続した三方マスター弁と、一端
を前記マスター弁の入側管に接続し他端を前記マ
スター弁の切換作動部に接続した管路取出水圧を
マスター弁切換作動部に作用させる水圧作用管と
を具備し、前記管路開閉弁の開閉作動装置は送水
管路からの取出水圧が所定水圧以上である時に管
路開閉弁を開となし前記水圧が所定の水圧より下
がつた時に管路開閉弁をバネ力により閉とする機
械的作動装置として構成され、また前記三方マス
ター弁は管路取出水圧が所定水圧以上の時に、こ
の水圧を弁開閉作動装置に作用させ、また前記取
出水圧が所定水圧以下になつた時には弁開閉作動
装置に作用している水圧を排水管側に逃すように
切換作動するスナツプアクシヨン型の三方弁で構
成されていることを特徴とする。
In order to achieve the above-mentioned purpose, this invention consists of a pipe opening/closing valve installed in the water supply pipeline, an inlet side connected to the upstream pipe section of the water supply pipeline's shutoff valve, and an outlet side connected to the pipeline opening/closing valve. A three-way master valve connected to an opening/closing actuating device, and a water pressure that causes water pressure from a pipe line whose one end is connected to the inlet pipe of the master valve and the other end is connected to the switching actuating part of the master valve to act on the master valve switching actuating part. The opening/closing device for the pipeline opening/closing valve opens the pipeline opening/closing valve when the water pressure taken out from the water supply pipeline is equal to or higher than a predetermined water pressure, and opens the pipeline opening/closing valve when the water pressure falls below a predetermined water pressure. The three-way master valve is configured as a mechanical actuator that closes the conduit opening/closing valve by a spring force, and when the conduit outlet water pressure is equal to or higher than a predetermined water pressure, the three-way master valve applies this water pressure to the valve opening/closing actuating device. It is characterized by being comprised of a snap-action three-way valve that switches to release the water pressure acting on the valve opening/closing device to the drain pipe side when the water pressure falls below a predetermined water pressure.
以下、この考案の一実施例を第２図及び第３図
の図面に従い説明する。この実施例は第１図に示
す飲料貯水槽２への送水流入側管路１Ａの管路破
断による汚水流入防止装置として構成した場合の
適用例であつて、前記管路１Ａの貯水槽２の近く
に設けられる管路開閉弁３は止水性のよい蝶形弁
が使用されている。前記管路１Ａの開閉弁３より
上流側の管路部（この弁上流側管路は符号１４で
示すし、弁下流側管路は符号１４ａで示してい
る）には圧力水取出管１１が接続され、この圧力
水取出管１１にはストレーナー１２を介して三方
マスター弁１５の入側管１３が接続されていると
共に、この三方マスター弁１５の出側管１６は前
記管路開閉弁３の開閉作動装置４にニードル弁１
７を介して接続されている。５は一端をマスター
弁入側管１３に接続し、他端を前記マスター弁１
５の切換作動部１５ａに接続した管路取出水圧を
マスター弁切換作動部１５ａに作用させる水圧作
用管で、この水圧作用管５の管途中には一つの口
６ａが排水口となつている手動形の三方切換弁６
が介装されている。
An embodiment of this invention will be described below with reference to the drawings of FIGS. 2 and 3. This embodiment is an application example in the case where it is configured as a device for preventing the inflow of waste water due to a pipe break in the water supply inflow side pipe 1A to the drinking water storage tank 2 shown in FIG. As the conduit opening/closing valve 3 provided nearby, a butterfly-shaped valve with good water-stopping properties is used. A pressure water outlet pipe 11 is provided in a pipe section of the pipe line 1A upstream of the on-off valve 3 (the pipe on the upstream side of the valve is indicated by 14, and the pipe on the downstream side of the valve is indicated by reference numeral 14a). An inlet pipe 13 of a three-way master valve 15 is connected to the pressure water outlet pipe 11 via a strainer 12, and an outlet pipe 16 of the three-way master valve 15 is connected to the outlet pipe 16 of the pipeline opening/closing valve 3. Needle valve 1 in opening/closing actuator 4
7. 5 has one end connected to the master valve inlet pipe 13 and the other end connected to the master valve 1
5 is a water pressure acting pipe that applies the water pressure from the pipeline connected to the switching actuating part 15a to the master valve switching actuating part 15a, and one port 6a in the middle of this water pressure acting pipe 5 serves as a drain port. Three-way switching valve shaped like 6
is interposed.
前記管路開閉弁３の開閉作動装置４は前記管路
１Ａ（開閉弁上流側管路１４）からの取出水圧が
所定の水圧（例えば１Kg／cm2）以上である時に管
路開閉弁３を開となし、前記水圧が所定の水圧
（例えば１Kg／cm2）より下がつた時に管路開閉弁
３をコイルスプリング２０のバネ力により閉とす
る、サイレンサー２１の付いたシリンダー１８及
びピストン１９からなる機械的作動装置として構
成されている。なお、前記ピストン１９の動きを
管路開閉弁３（蝶形弁）の回動作動部に伝達させ
る機構４ａについては公知のものを使用するた
め、具体的な構造は省略している。 The opening/closing device 4 for the pipeline opening/closing valve 3 operates the pipeline opening/closing valve 3 when the water pressure taken out from the pipeline 1A (the opening/closing valve upstream pipeline 14) is equal to or higher than a predetermined water pressure (for example, 1 Kg/cm 2 ). From a cylinder 18 and a piston 19 equipped with a silencer 21, which closes the conduit opening/closing valve 3 by the spring force of a coil spring 20 when the water pressure drops below a predetermined water pressure (for example, 1 Kg/ cm 2 ). It is configured as a mechanical actuator. Note that since a known mechanism 4a for transmitting the movement of the piston 19 to the rotational movement part of the conduit opening/closing valve 3 (butterfly valve) is used, the specific structure is omitted.
前記三方マスター弁１５は管路取出水圧が所定
水圧（例えば１Kg／cm2）以上の時に、この水圧を
弁開閉作動装置４に作用させ、また前記取出水圧
が所定水圧（例えば１Kg／cm2）以下になつた時に
は弁開閉作動装置３に作用している水圧を排水管
２３側に逃すように切換作動するバネ２５を用い
たスナツプアクシヨン型の三方弁で構成されてい
る。この三方マスター弁１５の第２図の状態から
第３図の状態への切換移動は前記バネ２５の弾力
によるもので、電源等の動力源は必要としない。 The three-way master valve 15 applies this water pressure to the valve opening/closing actuator 4 when the water pressure at the outlet of the pipeline is higher than a predetermined water pressure (for example, 1 Kg/cm 2 ), and when the water pressure at the outlet is equal to or higher than a predetermined water pressure (for example, 1 Kg/cm 2 ). It is constituted by a snap action type three-way valve using a spring 25 which operates to switch so as to release the water pressure acting on the valve opening/closing device 3 to the drain pipe 23 side when the water pressure is below. This switching movement of the three-way master valve 15 from the state shown in FIG. 2 to the state shown in FIG. 3 is achieved by the elasticity of the spring 25, and does not require a power source such as a power source.
第２図は送水圧力が所定圧力以上になつている
時の管路開弁状態を示すもので、管路１４からの
取出水圧で三方マスター弁１５が入側管１３及び
出側管１６を連通する位置に切換つている状態に
あり、圧力水取出管１１→ストレーナー１２→マ
スター弁入側管１３→三方マスター弁→同マスタ
ー弁の出側管１６→ニードル弁１７を通つてシリ
ンダー１８内に流入した圧力水の水圧により、ピ
ストン１９を介してスプリング２０が押され、管
路開閉弁３（蝶形弁）の開弁状態が維持されてい
る。この状態では前記スプリング２０が管路破断
状態として設定された所定圧力（前述した実施例
では１Kg／cm2）より弱いバネ力となつているの
で、管路開閉弁３が中間開度の状態になることは
ない。また、管路開閉弁３は蝶形弁を使用するの
で、開弁状態での損失水頭は極く小さい。 FIG. 2 shows the pipe line valve open state when the water supply pressure exceeds a predetermined pressure, and the three-way master valve 15 connects the inlet pipe 13 and the outlet pipe 16 with the water pressure taken out from the pipe line 14. Pressure water flows into the cylinder 18 through the pressure water outlet pipe 11 → strainer 12 → master valve inlet pipe 13 → three-way master valve → master valve outlet pipe 16 → needle valve 17. The pressure of the pressurized water pushes the spring 20 via the piston 19, and maintains the open state of the conduit opening/closing valve 3 (butterfly valve). In this state, the spring 20 has a spring force that is weaker than the predetermined pressure (1 kg/cm 2 in the above-mentioned embodiment) set for the state where the pipe is broken, so the pipe opening/closing valve 3 is in the intermediate opening state. It won't happen. Further, since the conduit opening/closing valve 3 uses a butterfly valve, the head loss in the valve open state is extremely small.
この第２図の状態で弁上流側管路１４が破断
し、この管路内を流れる送水圧力が下降して設定
値（実施例では１Kg／cm2）以下になると、水圧作
用管５の水圧低下によりスナツプアクシヨン型の
三方マスター弁１５がシリンダー１８内の圧力水
をマスター弁出側管１６を介して排水管２３側に
流す方向に第３図の如く切換作動する。この三方
マスター弁１５の第２図から第３図への切換作動
により、シリンダー１８とマスター弁出側管１６
は排水管２３と導通状態になり、この排水管２３
内は大気圧であるためスプリング２０により押さ
れているピストン１９がシリンダー１８内の水を
押し、大気圧と同じ圧力になつた水はニードル弁
１７→マスター弁出側管１６→三方マスター弁１
５を通つて排水管２３より排水され、前記ピスト
ン１９のバネ移動で管路開閉弁３は第３図のよう
な閉弁状態となる。この場合、前記ニードル弁１
７の排水通過速度を所定の値に設定しておくこと
により、シリンダー１８からの排水速度はコント
ロールされ、管路開閉弁３が急閉する問題及びこ
の急閉によるウオーターハンマの問題を防止する
ことができる。 When the pipe line 14 on the upstream side of the valve ruptures in the state shown in FIG . As a result of the drop, the snap-action three-way master valve 15 is operated to switch the pressurized water in the cylinder 18 to flow into the drain pipe 23 through the master valve outlet pipe 16, as shown in FIG. By switching the three-way master valve 15 from FIG. 2 to FIG. 3, the cylinder 18 and the master valve outlet pipe 16
is in electrical continuity with the drain pipe 23, and this drain pipe 23
Since the inside is at atmospheric pressure, the piston 19 pushed by the spring 20 pushes the water inside the cylinder 18, and the water that has reached the same pressure as the atmospheric pressure flows through the needle valve 17 → master valve outlet pipe 16 → three-way master valve 1
5 and drains from the drain pipe 23, and the spring movement of the piston 19 causes the conduit opening/closing valve 3 to be in the closed state as shown in FIG. In this case, the needle valve 1
By setting the drainage passage speed in step 7 to a predetermined value, the speed of drainage from the cylinder 18 is controlled, and the problem of sudden closing of the pipe opening/closing valve 3 and the problem of water hammer caused by this sudden closing can be prevented. I can do it.
なお、第３図のような管路遮断は地震等による
管路破断が生じない第２図に示す通常の状態にお
いても可能であり、この場合は水圧作用管５に組
込まれている手動形三方切換弁６を手動で排水口
６ａ側に切換えると、水圧作用管５内の水圧下降
によりスナツプアクシヨン型の三方マスター弁１
５が前記と同様に作動し、管路開閉弁３を任意の
時点で必要に応じ手動的に閉弁させることができ
る。 Incidentally, the pipe line interruption as shown in Fig. 3 is also possible in the normal state shown in Fig. 2 where no pipe rupture occurs due to earthquakes, etc., and in this case, the manual type three-way When the switching valve 6 is manually switched to the drain port 6a side, the water pressure in the hydraulic pipe 5 decreases, causing the snap-action three-way master valve 1 to
5 operates in the same manner as described above, and the conduit opening/closing valve 3 can be manually closed at any time as required.
而して、管路破断等により第３図の如く閉弁し
た、この考案装置を管路復旧等が終了した後に第
２図の通常状態とするためには、弁上流側管路１
４の水圧が所定の水圧以上の圧力になつた時点
で、三方マスター弁１５に組込まれているロツ
ク・リセツト釦を手動操作（この復旧時の操作は
前記のようなリセツト操作なしで自動的に行なう
こともできるが、この考案では施設管理者が管路
１４，１４ａや貯水槽２などを確認後、復旧でき
るように三方マスター弁１５の圧力水導入操作を
手動としている）すれば、管路取出水圧で前記マ
スター弁１５が第２図のように開弁し、マスター
弁入側管１３と出側管１６が導通状態となつて、
管路取出圧力水が圧力水取出管１１→ストレーナ
ー１２→マスター弁入側管１３→三方マスター弁
１５→同マスター弁の出側管１６→ニードル弁１
７を通つてシリンダー１８内に流入し、この流入
圧力水によりピトスン１９がスプリング２０を圧
縮する方向に押圧移動され、このピストン移動に
より該ピストン１９と連動された管路開閉弁３
（蝶形弁）が管路通水可能な開弁状態に復旧され
る。 Therefore, in order to bring this invented device into the normal state as shown in Fig. 2 after the pipe line restoration, etc., which has been closed as shown in Fig. 3 due to a pipe rupture, etc., the valve upstream pipe line 1
When the water pressure in step 4 reaches the predetermined water pressure or higher, manually operate the lock/reset button built into the three-way master valve 15 (this operation at the time of recovery is automatically performed without the above-mentioned reset operation). However, in this invention, after the facility manager checks the pipes 14, 14a and the water tank 2, etc., the pressure water introduction operation of the three-way master valve 15 is performed manually so that the facility manager can restore the pipes. The master valve 15 opens as shown in FIG. 2 due to the water pressure taken out, and the master valve inlet pipe 13 and outlet pipe 16 are brought into communication.
The pressure water taken out from the pipe is transferred to the pressure water take-out pipe 11 → strainer 12 → master valve inlet pipe 13 → three-way master valve 15 → master valve outlet pipe 16 → needle valve 1
7 into the cylinder 18, and this inflow pressure water presses and moves the piston 19 in the direction of compressing the spring 20, and this movement of the piston causes the piping opening/closing valve 3 which is interlocked with the piston 19 to move.
(butterfly valve) is restored to an open state allowing water to flow through the pipeline.
なお、前記実施例は飲料貯水槽２への送水流入
側管路１Ａに対する適用例について述べたが、前
記貯水槽２の送水流出側管路１Ｂに、この考案装
置を同様に適用することもできる。 In addition, although the above-mentioned embodiment described an example of application to the water supply inflow side pipe 1A to the drinking water storage tank 2, this invented device can also be applied to the water supply outflow side pipe 1B of the water storage tank 2 in the same way. .
また、第２図及び第３図の管路１４，１４ａが
地下配管或いは地上配管の通常の送水管路である
場合には、弁下流側管路１４ａが破断等した時の
管路破断部からの水流出を破断部上流側の管路開
閉弁３で自動的に止める送水管路の流出防止装置
として使用することができる。 In addition, if the pipelines 14 and 14a in FIGS. 2 and 3 are normal water supply pipelines such as underground piping or above-ground piping, the pipes will be removed from the rupture part when the valve downstream pipeline 14a is ruptured, etc. It can be used as an outflow prevention device for a water supply pipeline that automatically stops the outflow of water using the pipeline opening/closing valve 3 on the upstream side of the rupture part.
この考案の送水管路の流出入防止装置は前記の
構成のものであるから、送水管路が地震等により
破断した場合に、送水管路を電気を使用しない機
械的動作でもつて自動的に遮断して、この管路破
断部からの管路内への汚水流入、或いは管路破断
部からの外部への水流出を自動的に防止すること
ができる効果がある。
Since the inflow and outflow prevention device for water transmission pipes of this invention has the above-mentioned configuration, when the water transmission pipes are ruptured due to earthquakes, etc., the water transmission pipes are automatically shut off by mechanical operation that does not use electricity. Therefore, there is an effect that it is possible to automatically prevent sewage from flowing into the pipe from the pipe break or water flowing out from the pipe break.
第１図は飲料貯水槽への汚水流入防止装置を示
す従来説明図、第２図はこの考案装置の一実施例
を配管系統図として示した送水管路開弁状態（通
常時の状態）の説明図、第３図は地震等による管
路破断で送水管路が閉弁した状態を示す作用説明
図である。
１……送水管路、１Ａ……貯水槽流入側管路、
１Ｂ……貯水槽流出側管路、２……飲料貯水槽、
３……管路開閉弁、４……管路弁開閉装置、５…
…水圧作用管、６……手動形の三方切換弁、６ａ
……排水口、１１……管路圧力水取出管、１２…
…ストレーナー、１３……マスター弁入側管、１
４……管路開閉弁の上流側管路、１４ａ……管路
開閉弁の下流側管路、１５……スナツプアクシヨ
ン型の三方マスター弁、１５ａ……同マスター弁
の切換作動部、１６……マスター弁出側管、１７
……ニードル弁、１８……シリンダー、１９……
ピストン、２０……スプリング、２１……サイレ
ンサー、２３……排水管、２５……マスター弁ス
ナツプアクシヨン用のバネ。
Fig. 1 is a conventional explanatory diagram showing a device for preventing sewage from flowing into a drinking water tank, and Fig. 2 is a piping system diagram showing an example of this devised device, showing the water supply pipe valve open state (normal state). The explanatory drawing and FIG. 3 are action explanatory drawings showing a state in which the water supply pipe is closed due to pipe rupture due to an earthquake or the like. 1...Water transmission pipe, 1A...Water tank inflow side pipe,
1B... Water tank outflow side pipe, 2... Drinking water tank,
3... Pipe opening/closing valve, 4... Pipe valve opening/closing device, 5...
...Hydraulic action pipe, 6...Manual three-way switching valve, 6a
...Drain port, 11...Pipe pressure water outlet pipe, 12...
...Strainer, 13...Master valve inlet pipe, 1
4...Upstream pipe line of the pipe line on-off valve, 14a...Downstream pipe line of the pipe line on-off valve, 15...Snap-action three-way master valve, 15a...Switching unit of the master valve, 16...Master valve outlet pipe, 17
...Needle valve, 18...Cylinder, 19...
Piston, 20... Spring, 21... Silencer, 23... Drain pipe, 25... Spring for master valve snap action.
Claims (1)
水管路の開閉弁上流側管路部に接続し出側を管
路開閉弁の開閉作動装置に接続した三方マスタ
ー弁と、一端を前記マスター弁の入側管に接続
し他端を前記マスター弁の切換作動部に接続し
た管路取出水圧をマスター弁切換作動部に作用
させる水圧作用管とからなり、前記管路開閉弁
の開閉作動装置は送水管路からの取出水圧が所
定水圧以上である時に管路開閉弁を開となし前
記水圧が所定の水圧より下がつた時に管路開閉
弁をバネ力により閉とする機械的作動装置とし
て構成され、また前記三方マスター弁は管路取
出水圧が所定水圧以上の時に、この水圧を弁開
閉作動装置に作用させ、また前記取出水圧が所
定水圧以下になつた時には弁開閉作動装置に作
用している水圧を排水管側に逃すように切換作
動するスナツプアクシヨン型の三方弁であるこ
とを特徴とする送水管路の流出入防止装置。 (2) 前記水圧作用管は、この管途中に介装した一
つの口が排水口となつている手動形の三方切換
弁を備えていることを特徴とする実用新案登録
請求の範囲第１項に記載の送水管路の流出入防
止装置。[Scope of Claim for Utility Model Registration] (1) A pipe opening/closing valve installed in a water transmission pipeline, the inlet side of which is connected to the upstream pipe section of the opening/closing valve of the water transmission pipeline, and the outlet side of the pipeline opening/closing valve. A three-way master valve connected to an actuating device, and a hydraulic action in which water pressure from a line connected to an inlet pipe of the master valve at one end and the other end connected to a switching operation section of the master valve is applied to the master valve switching operation section. The opening/closing device for the pipeline opening/closing valve opens the pipeline opening/closing valve when the water pressure taken out from the water supply pipeline is equal to or higher than a predetermined water pressure, and opens the pipeline opening/closing valve when the water pressure drops below a predetermined water pressure. The three-way master valve is configured as a mechanical actuator that closes the on-off valve using a spring force, and when the water pressure at the outlet of the pipeline is higher than a predetermined water pressure, the three-way master valve applies this water pressure to the valve on-off actuator, and when the outlet water pressure is Prevention of inflow and outflow of water pipes characterized by a snap-action three-way valve that switches to release the water pressure acting on the valve opening/closing device to the drain pipe side when the water pressure drops below a predetermined level. Device. (2) Claim 1 of the utility model registration claim, characterized in that the water pressure pipe is equipped with a manual three-way switching valve, one of which is inserted in the middle of the pipe and one of which serves as a drain port. A device for preventing inflow and outflow of water pipes as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3391584U JPS60148618U (en) | 1984-03-09 | 1984-03-09 | Water supply pipe inflow/outflow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3391584U JPS60148618U (en) | 1984-03-09 | 1984-03-09 | Water supply pipe inflow/outflow prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60148618U JPS60148618U (en) | 1985-10-02 |
| JPH0417887Y2 true JPH0417887Y2 (en) | 1992-04-21 |
Family
ID=30536803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3391584U Granted JPS60148618U (en) | 1984-03-09 | 1984-03-09 | Water supply pipe inflow/outflow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60148618U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872779A (en) * | 1981-10-27 | 1983-04-30 | Shimizu Tekkosho:Kk | Fluid pipe line shutoff device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS583128Y2 (en) * | 1978-04-12 | 1983-01-20 | 前澤工業株式会社 | Emergency shutoff and automatic pressure regulating valve device |
-
1984
- 1984-03-09 JP JP3391584U patent/JPS60148618U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872779A (en) * | 1981-10-27 | 1983-04-30 | Shimizu Tekkosho:Kk | Fluid pipe line shutoff device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60148618U (en) | 1985-10-02 |
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