JP4495832B2 - Differential pressure release valve and open sprinkler equipment - Google Patents

Differential pressure release valve and open sprinkler equipment Download PDF

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Publication number
JP4495832B2
JP4495832B2 JP2000161657A JP2000161657A JP4495832B2 JP 4495832 B2 JP4495832 B2 JP 4495832B2 JP 2000161657 A JP2000161657 A JP 2000161657A JP 2000161657 A JP2000161657 A JP 2000161657A JP 4495832 B2 JP4495832 B2 JP 4495832B2
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connection port
side connection
piston
open
primary side
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JP2001340485A (en
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幸次 中澤
弘幸 山本
英男 周藤
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Yamato Protec Corp
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Yamato Protec Corp
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Description

【０００１】
【発明の属する技術分野】
本発明は開放式スプリンクラー設備において減圧開放型の一斉開放弁に用いられる差圧式開放弁、および開放式スプリンクラー設備に関する。
【０００２】
【従来の技術】
開放式スプリンクラー設備に用いられる一般の減圧開放型の一斉開放弁は、図４に示すように、胴体３０が玉形で、玉形弁と同様な弁体形状を持っており、弁箱３１内部に弁体３２で開閉される連通孔３３を有する隔壁３４があり、この隔壁３４の上部にあるシリンダー室３５内には弁体３２より受圧面積の大きなピストン３６があり、このピストン３６が加圧送水装置に接続される一次側接続口３７から分岐路４０を介してシリンダー室３５内に流入する充水圧を受けて弁体３２を押し、連通孔３３の閉止状態を保持している。シリンダー室３５の減圧作動側接続口３８は火災感知ヘッド系統及び手動開放装置に接続されており、感知ヘッドの作動または手動開放装置の操作によってシリンダー室３５内の圧力が減少することにより、受圧面積による圧力バランスが崩れ弁体３２が開放する。この開放により加圧送水装置からの充水が、一次側接続口３７から開放型スプリンクラーヘッドに接続される二次側接続口３９との間の連通孔３３をＳ字形に通って流れるようになっている。
【０００３】
【発明が解決しようとする課題】
しかるに、外観が玉形弁と同様な形状を持って流体をＳ字形に流すようにした上記一斉開放弁では、この弁全体が配管の径に比べかなり太くて嵩張る形になるため、他の設備や装置の配管やダクトなどが這わされている天井に設置するときにそれら配管やダクトなどが障害になることがあり、また重量も比較的大きい。
【０００４】
本発明の目的は、防火対象物の天井に小スペースで設置できるよう配管の管径に近い円筒形にスリム化を図れ、また軽量化を図れる差圧式開放弁、および開放式スプリンクラー設備を提供することにある。
【０００５】
【課題を解決するための手段】
本発明の差圧式開放弁は、図１、図２に例示するように、軸方向一端に加圧送水装置に接続される一次側接続口６を、軸方向他端に火災感知用閉鎖型ヘッド７及び手動起動弁に接続される減圧作動側接続口８を、軸方向中間部に開放型スプリンクラーヘッド９に接続される二次側接続口１０をそれぞれ有する円筒形のシリンダー２と、前進終端位置で一次側接続口６と二次側接続口１０とを閉止し、後退終端位置で一次側接続口６と二次側接続口１０とを連通させるようにシリンダー２内を軸方向に進退動するピストン３と、ピストン３に軸方向に貫通状に設けられ、ピストン３の前進終端位置で一次側接続口６と減圧作動側接続口８とを連通可能にし、後退終端位置で一次側接続口６と減圧作動側接続口８とを非連通状態にする連通路１４と、ピストン３を常に前進方向に押圧付勢するばね４と、シリンダー２内に出没自在に備えられ、前進終端位置にあるピストン３に対し係脱可能なストッパー５と、を備えていることに特徴を有するものである。
【０００６】
本発明の開放式スプリンクラー設備は、図３に例示するように、上記構成の差圧式開放弁１と、一次側接続口６に接続された加圧送水装置と、減圧作動側接続口８に接続された火災感知用閉鎖型ヘッド７及び手動起動弁と、二次側接続口１０に接続された開放型スプリンクラーヘッド９とを含むものである。
【０００７】
【作用】
上記構成の差圧式開放弁および開放式スプリンクラー設備によれば、平常時は、ピストンの連通路を介してシリンダー内の一次側と減圧作動側接続口側とが連通状態にあってシリンダー内の一次側の圧力と減圧作動側接続口側の圧力とが同圧状態にあり、ばねによってピストンを前進終端位置にまで押し、前進終端位置のピストンにより二次側接続口の閉止状態を保持している。
【０００８】
火災感知用閉鎖型ヘッドの開放作動または手動起動弁の遠隔操作によってシリンダー内の減圧作動側接続口側の圧力が減少することにより、一次側の圧力でピストンがばね圧に抗して後退し、二次側接続口が開放されて一次側接続口と連通する。このとき、後退終端位置にあるピストンの連通路は一次側接続口と減圧作動側接続口とを非連通状態にするので、一次側の水が減圧作動側接続口側に流れ込むのを阻止する。
【０００９】
充水する時にはストッパーを前進終端位置にあるピストンに係合させて該ピストンを当該位置に停止保持できるので、その充水圧でピストンが後退するようなことがない。充水後、ストッパーはピストンとの係合を解除することでピストンを自由に動かすことができる。
【００１０】
また上記差圧式開放弁は、円筒形のシリンダーの軸方向一端に一次側接続口を、軸方向他端に減圧作動側接続口を、軸方向中間部に二次側接続口をそれぞれ形成する一方、シリンダー内をピストンを軸方向に進退動させて前進終端位置で一次側接続口と二次側接続口とを閉止し、後退終端位置で一次側接続口と二次側接続口とを連通させるように構成してあるので、そのシリンダーは配管の径に近い細い円筒形にスリム化することができ、障害物がある天井の狭いスペースにも設置可能になる。
【００１１】
【発明の実施の形態】
本発明に係る差圧式開放弁の実施の形態を図面に基づき説明する。
図１は平常時の差圧式開放弁及び火災感知用閉鎖型ヘッドの断面図、図２は作動時の差圧式開放弁の断面図、図３は開放式スプリンクラー設備の構成例を示す正面図である。
【００１２】
本発明に係る差圧式開放弁１は、図１に示すように、シリンダー２、ピストン３、ピストン付勢用のばね４、及びピストン固定用のストッパー５から構成される。
【００１３】
図１、図３に示すように、シリンダー２は円筒形に形成されて、その軸方向一端に加圧送水装置（図示せず）に接続される一次側接続口６を、軸方向他端に火災感知用閉鎖型ヘッド７及び手動起動弁（図示せず）に接続される減圧作動側接続口８を、軸方向中間部に開放型スプリンクラーヘッド９に接続される二次側接続口１０をそれぞれ形成している。減圧作動側接続口８が形成されるシリンダー２の軸方向他端の開口内部にはばね受リング１１が嵌め込み固定され、シリンダー２の軸方向他端の外周にはねじ１２を設け、このねじ１２に環状のキャップ１３をねじ込み結合してあり、このキャップ１３により前記減圧作動側接続口８が構成される。
【００１４】
ピストン３は、シリンダー２内に軸方向に進退動自在に組み込まれて、図１に示すごとく前進終端位置で一次側接続口６と二次側接続口１０とを閉止し、図２に示すごとく後退終端位置で一次側接続口６と二次側接続口１０とを連通させる。ピストン３には連通路１４を軸方向に貫通状に形成している。その連通路１４は、ピストン３が図１に示すごとく前進終端位置にあるとき一次側接続口６と減圧作動側接続口８とを連通可能にし、ピストン３が図２に示すごとく後退終端位置にあるとき連通路１４のピストン裾側端面に臨む開口端１４ａがばね受リング１１で塞がれて一次側接続口６と減圧作動側接続口８とを非連通状態にする役目をする。ピストン３の外周の溝１５にはシリンダー２に対する気密を保つためのピストンリング１６を嵌め込んでいる。
【００１５】
シリンダー２内においてピストン３とばね受リング１１との間には圧縮コイルばねよりなるばね４が介在されて、このばね４によりピストン３が常に前進方向に押圧付勢されている。
【００１６】
ストッパー５は鍔部１７ａまたは頭部を持つねじ１７で構成され、シリンダー２の一次側接続口６寄り端部の外周一部に内外貫通状に設けたねじ穴１８にねじ込まれることによりその先端１７ｂがシリンダー２内に出没するように備えられる。このねじ１７は、シリンダー２の一次側の配管に水を充填加圧する時にのみ、その先端１７ｂがシリンダー２内に突出するようねじ込むことで前進終端位置にあるピストン３の外周の凹溝１９に係合させ、これによりピストン３が充水圧により後退することのないように停止保持させる役目をする。充水しないときはねじ１７はこの先端１７ｂをねじ穴１８内に没入させることでピストン３の凹溝１９から外して該ピストン３が自由に動くようにする。
【００１７】
図３は上記構成の差圧式開放弁１を一斉開放弁に使用した場合の開放式スプリンクラー設備（泡消火設備）の構成例を示す。
そこでは、防火対象物の天井２０に差圧式開放弁１がシリンダー２の一次側接続口６と減圧作動側接続口８を横向きにするとともに、二次側接続口１０を下向きにするように水平に設置される。そして一次側接続口６に加圧送水装置（図示せず）が一次側配管２１を介して接続される。二次側接続口１０には開放型スプリンクラーヘッド９がＬ形につないだ二次側配管２２を介して接続される。その開放型スプリンクラーヘッド９には泡ヘッドが用いられ、この泡ヘッドは下向きに設置される。減圧作動側接続口８には火災感知用閉鎖型ヘッド７及び手動起動弁（図示せず）が減圧作動側配管２３を介して接続される。その際、差圧式開放弁１は各配管２１，２２，２３の径に近いスリムな円筒形のシリンダー２で構成されているので、設置対象物の天井２０に他の設備や装置の配管やダクトなどの障害物２４があり、天井２０と障害物２４間の狭いスペースにも難なく設置することができる。
【００１８】
図１に示す火災感知用閉鎖型ヘッド７自体は周知構造のものであり、ヘッド本体２５、弁２６、火災感知部材２７及びデフレクタ２８から構成されて上向きに設置される。ヘッド本体２５は減圧作動側配管２３に接続される接続口部２９と、先窄まり形状の放出口４２とを連通状に形成している。ヘッド本体２５の放出口４２は弁２６で閉じ、この弁２６はグラスバルブあるいはヒュージブルリンクよりなる火災感知部材２７で放出口４２に対し密着状に押し付けられている。火災感知部材２７の上端側はヘッド本体２５から上向きに延設した支持フレーム４３の支持部４４で支持される。支持フレーム４３にデフレクタ２８が取り付けられている。
【００１９】
差圧式開放弁１を使用した上記構成の開放式スプリンクラー設備において、差圧式開放弁１の減圧作動側配管２３に充水する時にはストッパー５を前進終端位置にあるピストン３の凹溝１９に係合させてピストン３を当該位置に停止保持させる。したがって、充水圧でピストン３が後退するようなことがない。充水後は、ストッパー５をピストン３の凹溝１９から抜き出すことによりピストン３の動きを自由にする。
【００２０】
充水後の差圧式開放弁１は、図１に示すように、平常時、ピストン３の連通路１４を介してシリンダー２内の一次側と減圧作動側接続口側とが連通状態にあってシリンダー２内の一次側の圧力と減圧作動側接続口側の圧力とが同圧状態にあり、ばね４によってピストン３を前進終端位置にまで押し、この前進終端位置のピストン３により二次側接続口１０の閉止状態を保持している。
【００２１】
一方、火災感知用閉鎖型ヘッド７は、平常時、火災感知部材２７により弁２６が放出口４２に押し付けられて該放出口４２を閉止状態に保持し、ヘッド本体２５の接続口部２９内にまで充満されている加圧水は弁２６によってせき止められている。
【００２２】
いま、火災が発生し、火災熱が一定の温度以上になると、その火災熱により火災感知部材２７が分解し飛散して弁２６に対する押し付け状態を解除する。この解除に伴い弁２６が放水圧によって飛散することで放出口４２が開放される。放出口４２の開放作動により、または手動起動弁の遠隔操作によって差圧式開放弁１のシリンダー２の減圧作動側接続口側の圧力が減少することにより、図２に示すごとく一次側の充水の圧力でピストン３がばね圧に抗して後退し、一次側接続口６と二次側接続口１０とが連通状態になる。これにより一次側の充水が二次側配管２１に流通し、泡ヘッドよりなる開放型スプリンクラーヘッド９から発泡放水する。このとき、図２に示すごとく後退終端位置にあるピストン３の連通路１４はばね受リング１１で塞がれるので一次側接続口６と減圧作動側接続口８とは非連通状態にあり、したがって一次側の充水が減圧作動側接続口８側に流れ込むことはない。
【００２３】
【発明の効果】
本発明によれば、差圧式開放弁が減圧開放型一斉開放弁の作動を十分に果たし得るし、しかも配管の管径に近いスリムな円筒形に形成でき、また軽量化することができて障害物の存在する天井にも設置しやすいという利点がある。
【図面の簡単な説明】
【図１】平常時の差圧式開放弁及び火災感知用閉鎖型ヘッドの断面図である。
【図２】作動時の差圧式開放弁の断面図である。
【図３】開放式スプリンクラー設備の構成例を示す正面図である。
【図４】従来例の一斉開放弁の断面図である。
【符号の説明】
１ 差圧式開放弁
２ シリンダー
３ ピストン
４ ばね
５ ストッパー
６ 一次側接続口
７ 火災感知用閉鎖型ヘッド
８ 減圧作動側接続口
９ 開放型スプリンクラーヘッド
１０ 二次側接続口
１４ 連通路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a differential pressure type open valve used for a pressure reducing open type simultaneous release valve in an open type sprinkler facility, and an open type sprinkler facility.
[0002]
[Prior art]
As shown in FIG. 4, a general decompression release type simultaneous release valve used for an open sprinkler facility has a body 30 having a ball shape, and has a valve body shape similar to that of a ball valve. There is a partition wall 34 having a communication hole 33 that is opened and closed by a valve body 32, and a piston 36 having a larger pressure receiving area than the valve body 32 is provided in a cylinder chamber 35 above the partition wall 34. The valve body 32 is pushed by receiving a filling pressure flowing into the cylinder chamber 35 through the branch path 40 from the primary side connection port 37 connected to the water device, and the closed state of the communication hole 33 is maintained. The decompression operation side connection port 38 of the cylinder chamber 35 is connected to the fire detection head system and the manual release device, and the pressure receiving area is reduced by reducing the pressure in the cylinder chamber 35 by the operation of the detection head or the operation of the manual release device. The pressure balance due to is lost, and the valve body 32 is opened. By this opening, the water filling from the pressurized water supply device flows through the communication hole 33 between the primary side connection port 37 and the secondary side connection port 39 connected to the open type sprinkler head through the S-shape. ing.
[0003]
[Problems to be solved by the invention]
However, the above-described simultaneous open valve, which has the same external shape as the ball valve and allows the fluid to flow in an S-shape, is considerably thicker and bulkier than the pipe diameter. When installed on the ceiling where the pipes and ducts of equipment and equipment are installed, the pipes and ducts may become an obstacle, and the weight is relatively large.
[0004]
An object of the present invention is to provide a differential pressure type release valve and an open type sprinkler facility that can be slimmed down into a cylindrical shape close to the pipe diameter of a pipe so that it can be installed in a small space on the ceiling of a fire prevention object, and can be reduced in weight. There is.
[0005]
[Means for Solving the Problems]
As shown in FIGS. 1 and 2, the differential pressure type release valve of the present invention has a primary side connection port 6 connected to a pressurized water supply device at one end in the axial direction and a closed head for fire detection at the other end in the axial direction. 7 and a cylinder 8 having a decompression operation side connection port 8 connected to the manual start valve, and a secondary side connection port 10 connected to the open-type sprinkler head 9 in the axially intermediate portion, and a forward end position Thus, the primary side connection port 6 and the secondary side connection port 10 are closed, and the cylinder 2 is moved forward and backward in the axial direction so that the primary side connection port 6 and the secondary side connection port 10 communicate with each other at the backward end position. The piston 3 is provided penetrating in the axial direction in the piston 3, and allows the primary side connection port 6 and the pressure reducing operation side connection port 8 to communicate with each other at the forward end position of the piston 3, and the primary side connection port 6 at the reverse end position. And the pressure reducing operation side connection port 8 in a non-communication state 14 A spring 4 that always presses and urges the piston 3 in the forward direction, and a stopper 5 that can be moved in and out of the cylinder 2 and can be engaged with and disengaged from the piston 3 at the forward end position. It is what has.
[0006]
As illustrated in FIG. 3, the open sprinkler facility of the present invention is connected to the differential pressure release valve 1 having the above configuration, a pressurized water supply device connected to the primary side connection port 6, and a decompression operation side connection port 8. The closed type head 7 for fire detection and the manual start valve, and the open type sprinkler head 9 connected to the secondary side connection port 10 are included.
[0007]
[Action]
According to the differential pressure type release valve and the open type sprinkler system configured as described above, the primary side in the cylinder and the pressure reducing operation side connection port side are in communication with each other through the piston communication passage in the normal state. Side pressure and pressure reducing operation side connection port side pressure are in the same pressure state, the piston is pushed to the forward end position by the spring, and the secondary side connection port is closed by the piston at the forward end position .
[0008]
By reducing the pressure on the pressure reducing operation side connection port side in the cylinder by opening operation of the closed head for fire detection or remote operation of the manual start valve, the piston moves backward against the spring pressure by the pressure on the primary side, The secondary connection port is opened to communicate with the primary connection port. At this time, the communication path of the piston at the backward end position brings the primary side connection port and the pressure reducing operation side connection port into a non-communication state, thereby preventing the primary side water from flowing into the pressure reducing operation side connection port side.
[0009]
When filling with water, the stopper can be engaged with the piston at the forward end position and the piston can be stopped and held at that position, so that the piston does not move backward by the filling pressure. After filling with water, the stopper can move the piston freely by releasing the engagement with the piston.
[0010]
The differential pressure type release valve has a primary side connection port at one axial end of a cylindrical cylinder, a pressure reducing operation side connection port at the other axial end, and a secondary side connection port at an axially intermediate portion. The piston is moved back and forth in the axial direction in the cylinder to close the primary side connection port and the secondary side connection port at the forward end position, and to connect the primary side connection port and the secondary side connection port at the reverse end position. Thus, the cylinder can be slimmed into a thin cylindrical shape close to the diameter of the pipe, and can be installed in a narrow space on the ceiling where there is an obstacle.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a differential pressure release valve according to the present invention will be described with reference to the drawings.
1 is a cross-sectional view of a differential pressure type open valve and a fire-detecting closed head in a normal state, FIG. 2 is a cross sectional view of the differential pressure type open valve during operation, and FIG. 3 is a front view showing a configuration example of an open type sprinkler facility. is there.
[0012]
As shown in FIG. 1, the differential pressure type release valve 1 according to the present invention includes a cylinder 2, a piston 3, a piston urging spring 4, and a piston fixing stopper 5.
[0013]
As shown in FIGS. 1 and 3, the cylinder 2 is formed in a cylindrical shape, and has a primary side connection port 6 connected to a pressurized water supply device (not shown) at one end in the axial direction at the other end in the axial direction. A pressure-reducing operation side connection port 8 connected to the fire-detecting closed head 7 and a manual start valve (not shown) is provided, and a secondary side connection port 10 connected to the open-type sprinkler head 9 is provided in the middle in the axial direction. Forming. A spring receiving ring 11 is fitted and fixed inside the opening at the other end in the axial direction of the cylinder 2 where the pressure reducing operation side connection port 8 is formed, and a screw 12 is provided on the outer periphery of the other end in the axial direction of the cylinder 2. An annular cap 13 is screwed and connected to the pressure reducing operation side connection port 8.
[0014]
The piston 3 is incorporated in the cylinder 2 so as to be movable back and forth in the axial direction, and closes the primary side connection port 6 and the secondary side connection port 10 at the forward end position as shown in FIG. 1, and as shown in FIG. The primary side connection port 6 and the secondary side connection port 10 are communicated with each other at the backward end position. A communication passage 14 is formed in the piston 3 so as to penetrate in the axial direction. The communication passage 14 allows the primary side connection port 6 and the pressure reducing operation side connection port 8 to communicate with each other when the piston 3 is in the forward end position as shown in FIG. 1, and the piston 3 is in the reverse end position as shown in FIG. In some cases, the open end 14a facing the piston hem side end face of the communication passage 14 is blocked by the spring receiving ring 11 and serves to bring the primary side connection port 6 and the pressure reducing operation side connection port 8 into a non-communication state. A piston ring 16 is fitted in the groove 15 on the outer periphery of the piston 3 to keep the cylinder 2 airtight.
[0015]
A spring 4 made of a compression coil spring is interposed between the piston 3 and the spring receiving ring 11 in the cylinder 2, and the piston 3 is always pressed and urged in the forward direction by the spring 4.
[0016]
The stopper 5 is composed of a flange 17a or a screw 17 having a head. The stopper 5 is screwed into a screw hole 18 provided in an inner and outer penetrating manner at a part of the outer periphery of the end of the cylinder 2 closer to the primary side connection port 6. Is provided so as to appear and disappear in the cylinder 2. The screw 17 is engaged with the concave groove 19 on the outer periphery of the piston 3 at the forward end position by screwing so that the tip 17b protrudes into the cylinder 2 only when the primary side pipe of the cylinder 2 is filled and pressurized. This serves to stop and hold the piston 3 so as not to move backward due to the filling pressure. When the water is not filled, the screw 17 removes the tip 17b from the concave groove 19 of the piston 3 by immersing the tip 17b into the screw hole 18 so that the piston 3 can move freely.
[0017]
FIG. 3 shows a configuration example of an open-type sprinkler facility (foam fire-extinguishing facility) when the differential pressure-type open valve 1 having the above configuration is used as a simultaneous open valve.
There, the differential pressure release valve 1 is placed horizontally on the ceiling 20 of the fire prevention object so that the primary side connection port 6 and the pressure reducing operation side connection port 8 of the cylinder 2 are directed sideways and the secondary side connection port 10 is directed downward. Installed. A pressurized water supply device (not shown) is connected to the primary side connection port 6 via the primary side pipe 21. An open-type sprinkler head 9 is connected to the secondary side connection port 10 via a secondary side pipe 22 connected in an L shape. A foam head is used for the open sprinkler head 9, and the foam head is installed downward. The decompression operation side connection port 8 is connected to the fire detecting closed head 7 and a manual start valve (not shown) via a decompression operation side pipe 23. At that time, since the differential pressure type release valve 1 is composed of a slim cylindrical cylinder 2 having a diameter close to the diameter of each of the pipes 21, 22, 23, pipes and ducts of other equipment and devices are installed on the ceiling 20 of the installation object. The obstacle 24 can be installed without difficulty in a narrow space between the ceiling 20 and the obstacle 24.
[0018]
The fire detecting closed head 7 itself shown in FIG. 1 has a well-known structure, and is composed of a head body 25, a valve 26, a fire detecting member 27, and a deflector 28, and is installed upward. The head body 25 has a connection port portion 29 connected to the pressure reducing operation side pipe 23 and a tapered discharge port 42 formed in communication. The discharge port 42 of the head body 25 is closed by a valve 26, and this valve 26 is pressed in close contact with the discharge port 42 by a fire detection member 27 made of a glass valve or a fusible link. The upper end side of the fire detection member 27 is supported by a support portion 44 of a support frame 43 that extends upward from the head body 25. The deflector 28 is attached to the support frame 43.
[0019]
In the open sprinkler system having the above-described configuration using the differential pressure release valve 1, when the pressure reducing operation side pipe 23 of the differential pressure release valve 1 is filled, the stopper 5 is engaged with the concave groove 19 of the piston 3 at the forward end position. Then, the piston 3 is stopped and held at the position. Therefore, the piston 3 is not retracted by the charging pressure. After filling with water, the stopper 5 is extracted from the concave groove 19 of the piston 3 to freely move the piston 3.
[0020]
As shown in FIG. 1, the differential pressure type release valve 1 after filling is normally in a state where the primary side in the cylinder 2 and the pressure reducing operation side connection port side are in communication with each other via the communication passage 14 of the piston 3. The pressure on the primary side in the cylinder 2 and the pressure on the pressure reducing operation side connection port side are in the same pressure state, the piston 3 is pushed to the forward end position by the spring 4, and the secondary side connection is made by the piston 3 at this forward end position. The closed state of the mouth 10 is maintained.
[0021]
On the other hand, in the fire-detecting closed head 7, the valve 26 is pressed against the discharge port 42 by the fire detection member 27 in a normal state to hold the discharge port 42 in a closed state. The pressurized water filled up to is blocked by a valve 26.
[0022]
Now, when a fire occurs and the fire heat reaches a certain temperature or more, the fire detection member 27 is decomposed and scattered by the fire heat, and the pressing state against the valve 26 is released. Along with this release, the valve 26 is scattered by the water discharge pressure, so that the discharge port 42 is opened. By reducing the pressure on the pressure reducing operation side connection port side of the cylinder 2 of the differential pressure type release valve 1 by the opening operation of the discharge port 42 or by the remote operation of the manual activation valve, the primary side water filling as shown in FIG. The piston 3 is retracted against the spring pressure by the pressure, and the primary side connection port 6 and the secondary side connection port 10 are in communication with each other. As a result, the primary side water is circulated to the secondary side pipe 21 and the foamed water is discharged from the open sprinkler head 9 composed of the foam head. At this time, as shown in FIG. 2, the communication passage 14 of the piston 3 at the backward end position is closed by the spring receiving ring 11, so that the primary side connection port 6 and the pressure reducing operation side connection port 8 are not in communication. The primary side water does not flow into the pressure reducing operation side connection port 8 side.
[0023]
【The invention's effect】
According to the present invention, the differential pressure type release valve can sufficiently perform the operation of the decompression release type simultaneous release valve, can be formed into a slim cylindrical shape close to the pipe diameter of the pipe, and can be reduced in weight. There is an advantage that it is easy to install on the ceiling where objects exist.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a differential pressure type release valve and a fire-detecting closed head in a normal state.
FIG. 2 is a cross-sectional view of a differential pressure release valve during operation.
FIG. 3 is a front view showing a configuration example of an open sprinkler facility.
FIG. 4 is a cross-sectional view of a conventional simultaneous release valve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Differential pressure type | mold release valve 2 Cylinder 3 Piston 4 Spring 5 Stopper 6 Primary side connection port 7 Fire detection closed type head 8 Pressure reduction operation side connection port 9 Open type sprinkler head 10 Secondary side connection port 14 Communication path

Claims (3)

軸方向一端に加圧送水装置に接続される一次側接続口を、軸方向他端に火災感知用閉鎖型ヘッド及び手動起動弁に接続される減圧作動側接続口を、軸方向中間部に開放型スプリンクラーヘッドに接続される二次側接続口をそれぞれ有する円筒形のシリンダーと、
前進終端位置で一次側接続口と二次側接続口とを閉止し、後退終端位置で一次側接続口と二次側接続口とを連通させるようにシリンダー内を軸方向に進退動するピストンと、
ピストンに軸方向に貫通状に設けられ、ピストンの前進終端位置で一次側接続口と減圧作動側接続口とを連通可能にし、後退終端位置で一次側接続口と減圧作動側接続口とを非連通状態にする連通路と、
ピストンを常に前進方向に押圧付勢するばねと、
シリンダー内に出没自在に備えられ、前進終端位置にあるピストンに対し係脱可能なストッパーと、
を備えている差圧式開放弁。Open the primary side connection port connected to the pressurized water supply device at one end in the axial direction, and the decompression side connection port connected to the fire detection closed head and the manual start valve at the other end in the axial direction in the middle in the axial direction. Cylindrical cylinders each having a secondary connection port connected to the mold sprinkler head;
A piston that moves forward and backward in the cylinder in the axial direction so that the primary side connection port and the secondary side connection port are closed at the forward end position and the primary side connection port and the secondary side connection port are communicated at the backward end position. ,
The piston is provided in a penetrating manner in the axial direction so that the primary side connection port and the decompression operation side connection port can communicate with each other at the forward end position of the piston, and the primary side connection port and the decompression operation side connection port are not connected at the rear end position. A communication path to be in a communication state;
A spring that always presses and urges the piston in the forward direction;
A stopper that can be freely moved into and out of the cylinder, and can be engaged with and disengaged from the piston at the forward end position;
A differential pressure relief valve. 請求項１に記載の差圧式開放弁と、一次側接続口に接続された加圧送水装置と、減圧作動側接続口に接続された火災感知用閉鎖型ヘッド及び手動起動弁と、二次側接続口に接続された開放型スプリンクラーヘッドとを含む開放式スプリンクラー設備。The differential pressure type open valve according to claim 1, a pressurized water supply device connected to the primary side connection port, a fire detecting closed head and a manual start valve connected to the pressure reduction operation side connection port, and a secondary side An open sprinkler facility including an open sprinkler head connected to a connection port. 開放型スプリンクラーヘッドが泡ヘッドである請求項２記載の開放式スプリンクラー設備。The open-type sprinkler equipment according to claim 2, wherein the open-type sprinkler head is a foam head.
JP2000161657A 2000-05-31 2000-05-31 Differential pressure release valve and open sprinkler equipment Expired - Lifetime JP4495832B2 (en)

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