JP4041651B2

JP4041651B2 - Flowing water detector

Info

Publication number: JP4041651B2
Application number: JP2000361266A
Authority: JP
Inventors: 博行手島; 知加良杉本; 雅資大音
Original assignee: 株式会社立売堀製作所
Priority date: 2000-11-28
Filing date: 2000-11-28
Publication date: 2008-01-30
Anticipated expiration: 2020-11-28
Also published as: JP2002159585A

Description

【０００１】
【発明の属する技術分野】
本発明は高層建築物の部屋の天井に設けた防火用スプリンクラーの放水動作によって配管内圧力水の流動を感知し、圧力水の低下を補充する流水検知制御装置に関するものである。
【０００２】
【従来の技術】
従来、流体配管内の一定位置に一側面を開口したフロースイッチ室が介設され、該開口部は単板で閉鎖し、該室の他側面に遊支した腕の先端にパドルを設け、パドルの背面に永久磁石を設け、流体の速度、流量等の変化に応じてパドルが遊動し、上記フロースイッチ室の他側外面に設けたリードスイッチ（ＬｅａｄＳｗｉｔｃｈ）に上記永久磁石が近接して該スイッチを閉じ、該スイッチによって動作するブロワー又はポンプ等によって流速・流量又は流体圧を調整する装置が開発されている。
【０００３】
しかし、共同住宅、高層建築物等におけるスプリンクラーの配管では、スプリンクラーに常時圧力水を与える必要があるため、途中に逆止弁を介在させ、スプリンクラーの加熱溶融金属の溶蝕によるスプリンクラー放水が始まるとスプリンクラーと逆止弁との間の圧力水の圧力が低下し、逆止弁の下流側の圧力水が逆止弁を開いて下流側に流動する。
【０００４】
そのため従来の流速・流量・流体圧検出のためのパドルによるフロースイッチのみではスプリンクラーから配管全体の流体圧を保持する必要があって、レシーバーからスプリンクラーまで常時圧力を保持しなければならない。
【０００５】
従って必ずしも最上端のスプリンクラーまで圧力水が一定圧に保持されているものとは限らずスプリンクラーの安全性は保障し難い。
【０００６】
又フロースイッチ室を配管に装着するために、フロースイッチ室と一体の出入管と共に配管に介設する必要があった。
【０００７】
【発明が解決しようとする課題】
本発明は配管の側壁を開口し、該開口から逆止弁及び流水検知機構部分を閉鎖蓋と共に容易に装着し、該蓋にリードスイッチを設けることによって簡便に流水検知装置を形成し、かつスプリンクラーと逆止弁との間の圧力水によってスプリンクラーからの放水時間を保持し、その間に配管の基に設けたレシーバー（圧力水缶）及びポンプによる圧力水を迅速に供給することを目的とする。
【０００８】
【課題を解決するための手段】
上記の目的を達成するため本発明は
高層建築物の部屋の天井に防火用スプリンクラーが設けられ、該スプリンクラーに接続する配管の管壁に着脱自在閉鎖蓋で閉鎖された開口部を有し、該開口部の上流側に、逆錐雌テーパ面による透孔を中央部に形成した弁座を有し、該雌テーパ面に嵌合する雄テーパ面を有する逆止弁を備え、上記閉鎖蓋の内面、配管又は逆止弁の弁本体（弁座）側に遊動腕を枢支し、該腕に上記逆止弁を設け、配管内流動によって上記逆止弁が回動し、上記遊動腕又は逆止弁に設けた永久磁石が上記閉鎖蓋に近接又は接して上記閉鎖蓋の外面に設けたリードスイッチを閉じるよう形成し、上記逆止弁の下流側配管に加熱溶融金属で止水された上記防火用スプリンクラーが設けられ、上記逆支弁の上流側に圧力水タンクを介して送水ポンプを接続し、該ポンプの駆動電動機の駆動装置と電源との間に上記リードスイッチを介設した流水検知装置
上記遊動腕の先端に逆止弁を遊支した上記第１発明記載の流水検知装置
上記遊動腕の先端に上記逆止弁の中央部に穿設した小径逆錐形透孔に嵌合した小逆止弁を遊支した上記第１発明記載の流水検知装置
によって構成される。
【０００９】
【発明の実施の形態】
図５に示すように防火用スプリンクラー８に接続する配管１の側壁又は管壁１’に開口部２を穿設し、該開口部２は非磁性材料例えば青銅（ＢＣ６）によって形成された閉鎖蓋３で閉鎖し、ボルト９で締付けて着脱自在に支持される。
【００１０】
開口部２から上流側に弁本体（弁座）４”を溶着又は接着又はボルト９’（図４）で固定し、弁本体４”の中央部には逆錐雌テーパ面４ａによる透孔を形成し、該雌テーパ面４ａに雄テーパ面４ｂを有する逆止弁４を嵌合する。
【００１１】
上記閉鎖蓋３の内面３’下部には軸受１０を突設し、該軸受１０に遊動腕５を枢支する。遊動方向は配管１の中心線ｃと直交する軸１１の回りに正逆遊動する。軸受１０は図１〜図３に示す開口部２の下縁上面２’や図４に示す逆止弁４の弁本体４”の上面に設けることができる。
【００１２】
上記遊動腕５には永久磁石６を設け、配管１内の水の流動（上流側から下流側へ）によって該遊動腕５が下流側に回動し、上記永久磁石６が閉鎖蓋３の内面３’に近接又は接触して該閉鎖蓋３の外面３”に設けたリードスイッチ７の接点７’（図１（ロ）図）を発条１２に抗して閉じる。上記水の流動は、スプリンクラー８の開放散水による逆止弁４の上下流配管１，１内の水圧のバランスの変化によって逆止弁４が開くことによって図５に示す圧力水タンク１４（以下レシーバという）内の圧力水１５が自動的に供給されることによって起る。
【００１３】
この状態では遊動腕５の先端に枢軸１３（上記軸１１と平行）によって遊支した逆止弁４は図１（イ）図実線位置から仮想線位置に軸１１を中心として回動する。又図４では遊動腕５に固定して設けた逆止弁４は遊動腕５と共に実線位置から仮想線の位置に回動する。
【００１４】
そして図１（ロ）図に示すリードスイッチ７の接点７’が閉じて図５に示す駆動装置１７、駆動電動機（以下モータという）Ｍを回動し、ポンプＰを回動し、かつ電磁弁２４，２４’をリレー（図示していない）で開いて圧力水回路２５から配管１を経て圧力水をスプリンクラー８に継続供給することができる。
【００１５】
即ちレシーバ１４内の圧力水１５はレシーバ１４内の上部圧縮空気１６によって水圧が得られ、逆止弁４まで圧力水が常時充満し、スプリンクラー８の開放散水によって逆止弁４の下流側の既充填水圧の減圧により逆止弁４を図１〜図４実線位置から仮想線位置に開口し、上流側の圧力水が下流側に流動し、引続きスプリンクラー８から散水される。レシーバ１４内の圧力水１５はリードスイッチ７のＯＮによるモータＭ及びポンプＰの動作によって補給される。
【００１６】
又図２（イ）（ロ）図に示すように逆止弁４の中央部に穿設した小径逆錐形透孔４ｃに小逆止弁４’を嵌合し、上記軸１１に枢支した遊動腕５の先端を小逆止弁４’の中央部に遊支し、該遊動腕５に永久磁石６を設け、かつ逆止弁４の上面両側に遊支した２個の腕５”、５”の基端を上記軸１１に枢支し、該逆止弁４及び上記小逆止弁４’を図２（イ）図実線及び破線位置から圧力水流によって仮想線位置に回動させ永久磁石６を閉鎖蓋３の内面３’に近接又は接触させて閉鎖蓋３の外面３”に設けたリードスイッチ７を閉じる（ＯＮ）することができる。
【００１７】
図３では開口部２の上流側に逆止弁４を設け、その下面に設けた連杆４ｄの他端に止板４ｅを設け、加圧水の上記流動によって逆止弁４は実線位置から仮想線位置に移動して逆止弁４を開き、遊動腕５及びその先端に設けたパドル５’を実線位置から仮想線位置に上記軸１１を中心に回動し、遊動腕５に設けた永久磁石６を閉鎖蓋３の内面３’に近接又は接触させ、該蓋３の外面３”に設けたリードスイッチ７を閉じることができる。
【００１８】
図４では配管１に上記非磁性材料による大径配管２６を介在させボルト９’で配管１に接続させ、大径配管２６の上流端部に配管１と同一内径の弁本体（弁座）４”を形成し、該弁本体４”に逆止弁４を開閉自在に接し、大径配管２６に開口部２を形成し、閉鎖蓋３で閉鎖し、外側にリードスイッチ７を設けることができる。
【００１９】
尚図中１９で示すものは逆止弁４又は小逆止弁４’に設けた遊動腕５用軸受、図４中２０は貯水槽、２１は貯水面、２２は水路用逆止弁、２３はリードスイッチ７の回路配線である。
【００２０】
【発明の効果】
本発明は上述のように構成したので配管の管壁内に設けた逆錐雌雄テーパ面による弁座及び逆支弁の下流側の圧力水の減圧があって上流側との圧力のバランスの変動を生じても上流側の圧力水が下流側減圧を迅速にバックアップし得る効果がある。
【００２１】
又閉鎖蓋を開口部から取外して開口部から逆止弁本体を内部に容易に装着し、図３では逆止弁、止板を装入し、かつ遊動腕、逆止弁、小逆止弁又はパドル等を容易に装着し、その上で当該閉鎖蓋で開口部を閉鎖するだけで配管内装置を簡便に組立て得る効果がある。
【図面の簡単な説明】
【図１】（イ）図は本発明の流水検知装置を示す縦断面図である。
（ロ）図はリードスイッチの説明図である。
【図２】（イ）図は小逆止弁を用いた上記装置の縦断面図である。
（ロ）図は（イ）図Ａ−Ａ線による平面図である。
【図３】パドルを利用した状態の縦断面図である。
【図４】大径配管を用いた状態の縦断面図である。
【図５】スプリンクラー、ポンプ、モータ及び水槽を含むブロック図である。
【符号の説明】
１配管
１’ 管壁
２開口部
３着脱自在閉鎖蓋
３’ 内面
３” 外面
４逆止弁
４’ 小逆止弁
５遊動腕
５’ パドル
６永久磁石
７リードスイッチ
８防火用スプリンクラー
１４圧力水タンク
Ｐ送水ポンプ
Ｍ駆動電動機
１７駆動装置
１８電源[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water flow detection control device that senses the flow of pressure water in a pipe by a water discharge operation of a fire prevention sprinkler provided on the ceiling of a room of a high-rise building and replenishes the decrease in pressure water.
[0002]
[Prior art]
Conventionally, a flow switch chamber having one side opened at a fixed position in the fluid piping is provided, the opening is closed by a single plate, and a paddle is provided at the tip of an arm that is freely supported on the other side of the chamber. Permanent magnets are provided on the back of the paddle, and the paddles move in response to changes in fluid speed, flow rate, etc., and the permanent magnets come close to the lead switch (Lead Switch) provided on the other outer surface of the flow switch chamber. An apparatus has been developed that closes a switch and adjusts the flow velocity / flow rate or fluid pressure by a blower or a pump operated by the switch.
[0003]
However, in sprinkler piping in apartment buildings, high-rise buildings, etc., it is necessary to always supply pressure water to the sprinkler. Therefore, when a check valve is interposed in the middle of the sprinkler and sprinkler water discharge starts due to corrosion of the molten metal of the sprinkler, The pressure water pressure between the check valve and the check valve decreases, and the pressure water on the downstream side of the check valve opens the check valve and flows downstream.
[0004]
Therefore, it is necessary to hold the fluid pressure of the entire pipe from the sprinkler only by the conventional flow switch using the paddle for detecting the flow velocity, the flow rate, and the fluid pressure, and it is necessary to always keep the pressure from the receiver to the sprinkler.
[0005]
Therefore, the pressure water is not necessarily maintained at a constant pressure up to the uppermost sprinkler, and it is difficult to ensure the safety of the sprinkler.
[0006]
Further, in order to mount the flow switch chamber on the pipe, it was necessary to interpose the pipe together with the inlet / outlet pipe integrated with the flow switch chamber.
[0007]
[Problems to be solved by the invention]
The present invention opens a side wall of a pipe, easily attaches a check valve and a flowing water detection mechanism portion together with a closing lid from the opening, and easily forms a flowing water detection device by providing a reed switch on the lid, and a sprinkler The purpose of this is to maintain the water discharge time from the sprinkler by the pressure water between the valve and the check valve, and to quickly supply the pressure water from the receiver (pressure water can) and the pump provided at the base of the pipe during that time.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention
A fire prevention sprinkler is provided on the ceiling of a room of a high-rise building, the pipe wall connected to the sprinkler has an opening closed by a detachable closing lid, and an inverted cone female is located upstream of the opening. A check valve having a valve seat having a through hole formed by a taper surface formed in the center thereof and having a male taper surface fitted to the female taper surface, the inner surface of the closing lid, a pipe, or a valve body of the check valve A floating arm is pivotally supported on the (valve seat) side, the check valve is provided on the arm, the check valve is rotated by the flow in the pipe, and the permanent magnet provided on the floating arm or the check valve is A reed switch provided on the outer surface of the closing lid is closed close to or in contact with the closing lid, and the fire prevention sprinkler stopped with heated molten metal is provided in the downstream piping of the check valve. A water pump is connected to the upstream side of the branch valve via a pressure water tank, and the pump The water flow detection device tip end of the idler arm of the check valve to the first invention, wherein the free fulcrum to the tip of the water flow detection device the idler arm which is interposed the lead switch between the drive and the power of the drive motor The water flow detecting device according to the first aspect of the present invention comprises a small check valve fitted in a small-diameter inverted conical through hole formed in the central portion of the check valve.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 5, an opening 2 is formed in the side wall or pipe wall 1 ' of the pipe 1 connected to the fire sprinkler 8, and the opening 2 is a closed lid formed of a nonmagnetic material such as bronze (BC6). 3 is closed and tightened with a bolt 9 to be detachably supported.
[0010]
A valve body (valve seat) 4 ″ is welded or bonded or fixed with a bolt 9 ′ (FIG. 4) upstream from the opening 2, and a through hole formed by a reverse conical female tapered surface 4a is formed in the center of the valve body 4 ″. A check valve 4 having a male tapered surface 4b is fitted to the female tapered surface 4a.
[0011]
A bearing 10 protrudes from a lower surface of the inner surface 3 ′ of the closing lid 3, and the floating arm 5 is pivotally supported on the bearing 10. The idle direction moves forward and backward around an axis 11 orthogonal to the center line c of the pipe 1. The bearing 10 can be provided on the lower edge upper surface 2 ′ of the opening 2 shown in FIGS. 1 to 3 and the upper surface of the valve body 4 ″ of the check valve 4 shown in FIG.
[0012]
The floating arm 5 is provided with a permanent magnet 6, and the floating arm 5 is rotated downstream by the flow of water in the pipe 1 (from the upstream side to the downstream side). The contact 7 ′ (FIG. 1 (b)) of the reed switch 7 provided on the outer surface 3 ″ of the closing lid 3 in close proximity to or in contact with 3 ′ is closed against the ridge 12. The water flow is caused by the sprinkler. The pressure water 15 in the pressure water tank 14 (hereinafter referred to as a receiver) shown in FIG. Is caused by being automatically fed.
[0013]
In this state, the check valve 4 loosely supported on the tip of the free arm 5 by the pivot 13 (parallel to the shaft 11) rotates from the solid line position in FIG. In FIG. 4, the check valve 4 fixed to the free arm 5 rotates together with the free arm 5 from the solid line position to the virtual line position.
[0014]
Then, the contact 7 'of the reed switch 7 shown in FIG. 1 (b) is closed, and the drive device 17 and drive motor (hereinafter referred to as motor) M shown in FIG. 5 are rotated, the pump P is rotated, and the solenoid valve 24 and 24 ′ can be opened by a relay (not shown), and pressure water can be continuously supplied from the pressure water circuit 25 to the sprinkler 8 through the pipe 1.
[0015]
That is, the pressure water 15 in the receiver 14 is obtained by the upper compressed air 16 in the receiver 14 and is always filled with the pressure water up to the check valve 4, and the existing water on the downstream side of the check valve 4 by the sprinkling of the sprinkler 8 is opened. The check valve 4 is opened from the solid line position in FIGS. 1 to 4 to the phantom line position by reducing the filling water pressure, and the upstream pressure water flows downstream and is continuously sprinkled from the sprinkler 8. The pressure water 15 in the receiver 14 is replenished by the operation of the motor M and the pump P when the reed switch 7 is turned on.
[0016]
Further, as shown in FIGS. 2A and 2B, a small check valve 4 'is fitted into a small-diameter reverse cone-shaped through hole 4c formed in the central portion of the check valve 4, and is pivotally supported on the shaft 11. The tip of the free floating arm 5 is loosely supported at the center of the small check valve 4 ′, the permanent arm 6 is provided on the free arm 5, and the two arms 5 ″ loosely supported on both sides of the upper surface of the check valve 4 ” The base end of 5 ″ is pivotally supported on the shaft 11, and the check valve 4 and the small check valve 4 ′ are rotated from the position shown by the solid line and the broken line in FIG. The reed switch 7 provided on the outer surface 3 ″ of the closing lid 3 can be closed (ON) by bringing the permanent magnet 6 close to or in contact with the inner surface 3 ′ of the closing lid 3.
[0017]
In FIG. 3, a check valve 4 is provided on the upstream side of the opening 2 and a stop plate 4e is provided on the other end of the linkage 4d provided on the lower surface thereof. The check valve 4 is moved to the position, the floating arm 5 and the paddle 5 ′ provided at the tip thereof are rotated from the solid line position to the virtual line position around the shaft 11, and the permanent magnet provided on the floating arm 5. 6 can be brought close to or in contact with the inner surface 3 ′ of the closure lid 3, and the reed switch 7 provided on the outer surface 3 ″ of the lid 3 can be closed.
[0018]
In FIG. 4, a large-diameter pipe 26 made of the above nonmagnetic material is interposed in the pipe 1 and connected to the pipe 1 with a bolt 9 ′, and a valve body (valve seat) 4 having the same inner diameter as the pipe 1 is connected to the upstream end of the large-diameter pipe 26. The valve body 4 "can be freely opened and closed, the opening 2 can be formed in the large-diameter pipe 26, closed with the closing lid 3, and the reed switch 7 can be provided outside. .
[0019]
In the figure, reference numeral 19 denotes a bearing for the floating arm 5 provided on the check valve 4 or the small check valve 4 ′, 20 in FIG. 4, a water storage tank, 21 a water storage surface, 22 a waterway check valve, 23 Is a circuit wiring of the reed switch 7.
[0020]
【The invention's effect】
Since the present invention is configured as described above, there is pressure reduction of the pressure water on the downstream side of the valve seat and the reversely supported valve by the inverted conical male and female tapered surfaces provided in the pipe wall of the pipe , and the fluctuation of the balance of pressure with the upstream side is reduced. Even if it occurs, there is an effect that the upstream pressure water can quickly back up the downstream pressure reduction.
[0021]
Also, the closing lid is removed from the opening, and the check valve body is easily mounted from the opening. In FIG. 3, the check valve and the stop plate are inserted, and the floating arm, check valve, and small check valve are installed. Alternatively, it is possible to easily assemble the in-pipe device simply by attaching a paddle or the like and then closing the opening with the closing lid.
[Brief description of the drawings]
FIG. 1A is a longitudinal sectional view showing a flowing water detection apparatus of the present invention.
(B) The figure is an explanatory view of a reed switch.
FIG. 2A is a longitudinal sectional view of the above apparatus using a small check valve.
(B) The figure is (a) a plan view taken along line AA.
FIG. 3 is a longitudinal sectional view of a state using a paddle.
FIG. 4 is a longitudinal sectional view of a state using a large-diameter pipe.
FIG. 5 is a block diagram including a sprinkler, a pump, a motor, and a water tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe 1 'Pipe wall 2 Opening part 3 Removable closing lid 3' Inner surface 3 "Outer surface 4 Check valve 4 'Small check valve 5 Floating arm 5' Paddle 6 Permanent magnet 7 Reed switch 8 Fire sprinkler 14 Pressure water tank P Water pump M Drive motor 17 Drive device 18 Power supply

Claims

A fire prevention sprinkler is provided on the ceiling of a room of a high-rise building, the pipe wall connected to the sprinkler has an opening closed by a detachable closing lid, and an inverted cone female is located upstream of the opening. A check valve having a valve seat having a through hole formed by a taper surface formed in the center thereof and having a male taper surface fitted to the female taper surface, the inner surface of the closing lid, a pipe, or a valve body of the check valve A floating arm is pivotally supported on the (valve seat) side, the check valve is provided on the arm, the check valve is rotated by the flow in the pipe, and the permanent magnet provided on the floating arm or the check valve is A reed switch provided on the outer surface of the closing lid is closed close to or in contact with the closing lid, and the fire prevention sprinkler stopped with heated molten metal is provided in the downstream piping of the check valve. A water pump is connected to the upstream side of the branch valve via a pressure water tank, and the pump Water flow detection device which is interposed the lead switch between the drive and the power of the drive motor.

The flowing water detection device according to claim 1, wherein a check valve is supported at the tip of the floating arm.

The flowing water detection device according to claim 1, wherein a small check valve fitted into a small-diameter inverted conical through hole formed in a central portion of the check valve is loosely supported at a tip of the floating arm.