JPH10272202A - Automatic valve of fire extinguishing equipment - Google Patents
Automatic valve of fire extinguishing equipmentInfo
- Publication number
- JPH10272202A JPH10272202A JP8130697A JP8130697A JPH10272202A JP H10272202 A JPH10272202 A JP H10272202A JP 8130697 A JP8130697 A JP 8130697A JP 8130697 A JP8130697 A JP 8130697A JP H10272202 A JPH10272202 A JP H10272202A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pipe
- pressure
- valve body
- fire extinguishing
- 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
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Fluid-Driven Valves (AREA)
- Safety Valves (AREA)
- Details Of Valves (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、水噴霧消火設
備、スプリンクラ消火設備や泡消火設備等の設備元弁、
区画元弁、地区選別弁などに用いられる消火設備の自動
弁に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to equipment main valves for water spray fire extinguishing equipment, sprinkler fire extinguishing equipment, foam fire extinguishing equipment, etc.
The present invention relates to an automatic valve of a fire extinguishing system used for a division base valve, a district selection valve, and the like.
【０００２】[0002]
【従来の技術】従来の水噴霧消火設備などの消火設備と
して、自動弁を備えたドライ配管が用い られている。
このドライ配管では、自動弁の一次側配管内は消火用水
が封入され、その二次側配管内には気体が入れられてい
る。この消火設備では、自動弁を急激に全開すると、一
次側の高圧消火用水が気体の入っている二次側配管に高
速で流れ込む。2. Description of the Related Art As a conventional fire extinguishing system such as a water spray fire extinguishing system, a dry pipe equipped with an automatic valve is used.
In this dry pipe, fire-extinguishing water is filled in the primary pipe of the automatic valve, and gas is filled in the secondary pipe. In this fire extinguishing system, when the automatic valve is suddenly fully opened, high-pressure fire-extinguishing water on the primary side flows into the secondary pipe containing gas at high speed.
【０００３】ところが、二次側配管の出口側はモニタノ
ズル等で急激に絞られているので、振動や騒音等の発
生、所謂ウォータハンマ現象が発生する。However, since the outlet side of the secondary pipe is rapidly throttled by a monitor nozzle or the like, vibration, noise and the like, that is, a so-called water hammer phenomenon occurs.
【０００４】そこで、このウォータハンマ現象の発生を
防止するため、次の様な開閉弁が用いられている。即
ち、一次側配管と二次側配管とを接続する弁本体と、該
弁本体の連通孔を開閉する弁主体と、該弁主体と二次流
路を介して対向するピストン室と、該ピストン室内に配
設され、前記弁主体より受圧面積の大きい制御ピストン
と、前記弁主体と該制御ピストンとを連結するステム
と、前記ピストン室と一次側配管とを連通せしめる制御
バルブ付導圧管と、前記二次側配管に接続された感圧管
と、前記ステムの摺動により該感圧管と前記導圧管とを
連通せしめる補助弁制御手段と、からなることを特徴と
する消火設備の開閉弁。In order to prevent the occurrence of the water hammer phenomenon, the following on-off valve is used. That is, a valve body that connects the primary side pipe and the secondary side pipe, a valve body that opens and closes a communication hole of the valve body, a piston chamber that faces the valve body via a secondary flow path, and the piston A control piston disposed in the chamber and having a larger pressure receiving area than the valve main body, a stem connecting the valve main body and the control piston, a control valve impulse line for communicating the piston chamber with a primary side pipe, An on-off valve for a fire extinguishing system, comprising: a pressure-sensitive tube connected to the secondary pipe; and auxiliary valve control means for connecting the pressure-sensitive tube and the pressure guiding tube by sliding the stem.
【０００５】この開閉弁では、制御バルブを開くと、一
次側配管内の消火用水は導圧管を介してピストン室に流
入する。該ピストン室内に流入した消火用水の一部は、
制御ピストンを二次流路側に押圧するので、ステムが同
方向に移動する。そうすると、弁主体は少し開いた状態
でバランスし二次側配管が充水されるとともに、この二
次側配管がある程度迄充水されると、自動弁の二次側圧
力が前記バランス圧以上に達し、制御ピストンが二次流
路側に移動するので、弁主体は全開される。In this open / close valve, when the control valve is opened, the fire extinguishing water in the primary pipe flows into the piston chamber via the pressure guiding pipe. Part of the fire-fighting water flowing into the piston chamber is:
Since the control piston is pressed toward the secondary flow path, the stem moves in the same direction. Then, while the valve main body is balanced in a slightly open state and the secondary pipe is filled with water, and when the secondary pipe is filled to a certain extent, the secondary pressure of the automatic valve becomes equal to or higher than the balance pressure. As the control piston moves to the secondary flow path side, the valve main body is fully opened.
【０００６】[0006]
【発明が解決しようとする課題】従来例は次のような問
題がある。 （１）通常の消火設備では特に問題を発生させないが、
次の様な特殊な消火用配管の場合には、該二次側配管の
末端部まで充水される前、即ち、充水完了前に所定圧
（前記バランス圧以上）に達し、全開することがある。The prior art has the following problems. (1) Normal fire extinguishing equipment does not cause any particular problems,
In the case of the following special fire-extinguishing pipes, it is necessary to reach a predetermined pressure (above the above-mentioned balance pressure) and fully open before the water is filled to the end of the secondary pipe, that is, before the filling is completed. There is.
【０００７】（ａ）二次側配管に高い立ち上がり配管、
例えば、直径４５０mm、高さ５０ｍの立ち上がり配管、
が接続されている場合。この場合には二次側配管に水頭
圧、例えば５kg／cm2の水頭圧、がかかるので、二次側
配管内の圧力は、二次側配管内が充水 完了前に所定圧
まで上昇する。(A) A high rising pipe is used for the secondary pipe,
For example, a rising pipe with a diameter of 450 mm and a height of 50 m,
Is connected. In this case, a water head pressure, for example, a water head pressure of 5 kg / cm 2 , is applied to the secondary pipe, so that the pressure in the secondary pipe increases to a predetermined pressure before the secondary pipe is completely filled with water. .
【０００８】（ｂ）二次側配管が、特別に長い場合、例
えば、長さが１kmある場合には、該管内の摩擦抵抗が大
きくなるので、二次側配管内の圧力は、二次側配管内が
充水完了前に所定圧まで上昇する。(B) If the secondary pipe is particularly long, for example, if the length is 1 km, the frictional resistance in the pipe becomes large. The pressure in the pipe rises to a predetermined pressure before the completion of water filling.
【０００９】（２）弁主体の二次側圧力を閉弁方向の駆
動源とし、一次側圧力を開弁方向の駆動源に利用し、パ
イロット弁によって二次側圧力が制御されている。その
ため、全開しないので、圧力損失が大きい。 （３）二次側圧力を調整できない。そのため、当該設備
の所要圧力に調整し、他の防消火設備と協調して防消火
活動を行うことができない。(2) The secondary pressure of the valve is used as a drive source in the valve closing direction, and the primary pressure is used as a drive source in the valve opening direction, and the secondary pressure is controlled by a pilot valve. For this reason, the pressure is not fully opened, and the pressure loss is large. (3) The secondary pressure cannot be adjusted. For this reason, it is not possible to adjust the required pressure of the equipment and perform fire-extinguishing activities in cooperation with other fire-extinguishing equipment.
【００１０】この発明は、上記事情に鑑み、ウォータハ
ンマ現象の発生を確実に防止できるようにすることを目
的とする。他の目的は、二次側圧力を調整できるように
することである。In view of the above circumstances, it is an object of the present invention to reliably prevent the occurrence of a water hammer phenomenon. Another object is to be able to regulate the outlet pressure.
【００１１】[0011]
【課題を解決するための手段】この発明は、消火用配管
に設けた弁本体の連通口を開閉する弁主体と、ピストン
室に装着され前記弁主体に連結された制御ピストンと、
該ピストン室の加圧室と該弁主体の一次側とを連結する
導圧管と、を備えた消火設備であって；該導圧管に二次
圧力設定用パイロット弁を設け、該パイロット弁を弁主
体の二次側に連結したことを特徴とする消火設備の自動
弁、である。According to the present invention, there is provided a valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a control piston mounted in a piston chamber and connected to the valve body,
What is claimed is: 1. A fire extinguishing system, comprising: a pressure guiding pipe connecting a pressurizing chamber of the piston chamber and a primary side of the valve main body; a pilot valve for setting a secondary pressure is provided in the pressure guiding pipe; An automatic valve for a fire extinguishing system, which is connected to a secondary side of a main body.
【００１２】この発明は、消火用配管に設けた弁本体の
連通口を開閉する弁主体と、ピストン室に装着され前記
弁主体に連結された制御ピストンと、該ピストン室の加
圧室と該弁主体の一次側とを連結する導圧管と、を備え
た消火設備であって；該導圧管に第１排水管を連結し、
該第１排水管に二次圧力設定用パイロット弁を設け、該
パイロット弁を弁主体の二次側に連結したことを特徴と
する消火設備の自動弁、である。According to the present invention, there is provided a valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a control piston mounted on a piston chamber and connected to the valve body, a pressurizing chamber of the piston chamber, A pressure pipe connecting the primary side of the valve body; and a first drain pipe connected to the pressure pipe,
An automatic valve for fire extinguishing equipment, wherein a pilot valve for setting a secondary pressure is provided in the first drain pipe, and the pilot valve is connected to a secondary side of a valve main body.
【００１３】この発明は、消火用配管に設けた弁本体の
連通口を開閉する弁主体と、ピストン室に装着され前記
弁主体に連結された制御ピストンと、該ピストン室の加
圧室と該弁主体の一次側とを連結する導圧管と、を備え
た消火設備であって；該ピストン室の加圧室に第２排水
管を接続し、該第２排水管に二次圧力設定用パイロット
弁を設け、該パイロット弁を弁主体の二次側に連結した
ことを特徴とする消火設備の自動弁、である。According to the present invention, there is provided a valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a control piston mounted in a piston chamber and connected to the valve body, a pressurizing chamber of the piston chamber, A pressure guiding pipe connecting the primary side of the valve body; and a second drain pipe connected to the pressurizing chamber of the piston chamber, and a secondary pressure setting pilot connected to the second drain pipe. An automatic valve for a fire extinguishing system, wherein a valve is provided, and the pilot valve is connected to a secondary side of a valve main body.
【００１４】この発明は、消火用配管に設けた弁本体の
連通口を開閉する弁主体と、該弁主体と二次流路を介し
て対向するピストン室と、該ピストン室に装着され前記
弁主体に連結された制御ピストンと、該ピストン室の加
圧室と該弁主体の一次側とを連結する導圧管と、を備え
た消火設備であって；該ピストン室の加圧室に排水管を
連結し、該排水管に充水感応用パイロット弁を設けると
ともに、該パイロット弁を前記弁主体の二次側に連結
し、該導圧管に二次圧力設定用パイロット弁を設け、該
パイロット弁を弁主体の二次側に連結したことを特徴と
する消火設備の自動弁、である。According to the present invention, there is provided a valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a piston chamber opposed to the valve body via a secondary flow path, and the valve mounted in the piston chamber. A fire extinguishing system comprising: a control piston connected to a main body; and a pressure guiding pipe connecting a pressurizing chamber of the piston chamber to a primary side of the valve main body; A pilot valve for secondary pressure setting is provided in the impulse line, and the pilot valve is connected to the secondary side of the valve main body. Is connected to the secondary side of the valve main body.
【００１５】この発明は、消火用配管に設けた弁本体の
連通口を開閉する弁主体と、該弁主体と二次流路を介し
て対向するピストン室と、該ピストン室に装着され前記
弁主体に連結された制御ピストンと、該ピストン室の加
圧室と該弁主体の一次側とを連結する導圧管と、を備え
た消火設備であって；該ピストン室の加圧室に排水管を
連結し、該排水管に充水感応用パイロット弁を設けると
ともに、該パイロット弁を前記弁主体の二次側に連結
し、該導圧管に第１排水管を連結し、該第１排水管に二
次圧力設定用パイロット弁を設け、該パイロット弁を弁
主体の二次側に連結したことを特徴とする消火設備の自
動弁、である。According to the present invention, there is provided a valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a piston chamber opposed to the valve body via a secondary flow path, and the valve mounted in the piston chamber. A fire extinguishing system comprising: a control piston connected to a main body; and a pressure guiding pipe connecting a pressurizing chamber of the piston chamber to a primary side of the valve main body; Connecting the pilot valve to the secondary side of the valve main body, connecting the first drain pipe to the impulse pipe, and connecting the first drain pipe to the drain pipe. And a pilot valve for setting a secondary pressure, and the pilot valve is connected to a secondary side of the valve main body.
【００１６】この発明は、消火用配管に設けた弁本体の
連通口を開閉する弁主体と、該弁主体と二次流路を介し
て対向するピストン室と、該ピストン室に装着され前記
弁主体に連結された制御ピストンと、該ピストン室の加
圧室と該弁主体の一次側とを連結する導圧管と、を備え
た消火設備であって；該ピストン室の加圧室に排水管を
連結し、該排水管に充水感応用パイロット弁を設けると
ともに、該パイロット弁を感圧管を介して前記弁主体の
二次側に連結し、該導圧管に二次圧力設定用パイロット
弁を設け、該パイロット弁を前記感圧管に連結したこと
を特徴とする消火設備の自動弁、である。According to the present invention, there is provided a valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a piston chamber opposed to the valve body via a secondary flow path, and the valve mounted on the piston chamber. A fire extinguishing system comprising: a control piston connected to a main body; and a pressure guiding pipe connecting a pressurizing chamber of the piston chamber to a primary side of the valve main body; And a drainage pipe provided with a plumbing application pilot valve, and the pilot valve is connected to a secondary side of the valve main body via a pressure-sensitive pipe, and a pilot valve for setting a secondary pressure is provided on the pressure-guiding pipe. An automatic valve for a fire extinguishing system, wherein the pilot valve is connected to the pressure-sensitive tube.
【００１７】[0017]
【発明の実施の形態】消火用配管に設けられた弁主体の
連通口に弁主体を配設し、該弁主体と二次通路を介して
排水孔付ピストン室を設ける。このピストン室に脱気孔
付制御ピストンを装着するとともに該ピストンを前記弁
主体にステムを介して連結する。BEST MODE FOR CARRYING OUT THE INVENTION A valve main body is provided at a communication port of a valve main body provided in a fire extinguishing pipe, and a piston chamber with a drain hole is provided through the valve main body and a secondary passage. A control piston with a deaeration hole is mounted in the piston chamber, and the piston is connected to the valve main body through a stem.
【００１８】該ピストン室の加圧室と前記弁主体の一次
側配管とを起動弁付導圧管を介して連結し、該加圧室に
充水感応用パイロット弁付排水管を連結する。この排水
管は大気に開放されている。The pressurizing chamber of the piston chamber and the primary pipe of the valve main body are connected via a pressure guiding pipe with a start valve, and a drainage pipe with a plumbing application pilot valve is connected to the pressurizing chamber. This drain is open to the atmosphere.
【００１９】導圧管には、二次側圧力設定用パイロット
弁が設けられ、このパイロット弁は二次側に連結されて
いる。The pressure guiding pipe is provided with a secondary pressure setting pilot valve, and this pilot valve is connected to the secondary side.
【００２０】前記弁主体の二次側配管と充水感応用パイ
ロット弁とを感圧管を介して連結し、該二次側配管の圧
力が充水完了により設定圧力となった時に該パイロット
弁を閉じ、弁主体を全開にする。[0020] The secondary pipe mainly composed of the valve and the pilot valve for applying the feeling of water filling are connected via a pressure sensing pipe. When the pressure of the secondary pipe reaches the set pressure due to the completion of the water filling, the pilot valve is opened. Close and fully open the valve body.
【００２１】なお、パイロット弁を電磁弁等により形成
された常時開弁にするとともに、二次側配管の充水完了
を検出する常時開弁の制御手段を設けても良い。この場
合は、該制御手段からの充水完了信号を受信するまで
は、常時開弁を開の状態にしてウォータハンマ現象が発
生しない程度の流速となる様に弁主体の開度を維持し、
該制御手段からの充水完了信号の受信により該常時開弁
を閉の状態にして弁主体を全開する。The pilot valve may be a normally open valve formed by an electromagnetic valve or the like, and a normally open control means for detecting completion of filling of the secondary pipe may be provided. In this case, the valve-mainly-opening degree is maintained until the water-filling completion signal is received from the control means, and the valve is constantly opened so that the flow rate is such that the water hammer phenomenon does not occur.
The normally open valve is closed and the valve main body is fully opened by receiving the water filling completion signal from the control means.
【００２２】又、二次側圧力設定用パイロット弁は、導
圧管に設ける代わりに、該導圧管に連結した第１排水管
に設け、該パイロット弁を前記二次側に連結してもよ
い。The pilot valve for setting the secondary pressure may be provided in the first drain pipe connected to the pressure guiding pipe instead of being provided in the pressure guiding pipe, and the pilot valve may be connected to the secondary side.
【００２３】[0023]
【実施例】この発明の第１実施例を図１により説明す
る。消火用配管に弁本体１を設け、該弁本体１の弁主体
５をピストン室１０に嵌着されている制御ピストン１１
に連結する。このピストン室１０の排気室１４に設けら
れた排気孔１６ａは、ピストン室１０の排気管１６を介
して大気と連通し、又、制御ピストン１１には、前記排
気孔１６ａより大径の脱気孔１５が設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. A control piston 11 having a valve body 1 provided in a fire extinguishing pipe and a valve body 5 of the valve body 1 fitted in a piston chamber 10.
Connect to An exhaust hole 16a provided in the exhaust chamber 14 of the piston chamber 10 communicates with the atmosphere through an exhaust pipe 16 of the piston chamber 10, and the control piston 11 has a vent hole having a larger diameter than the exhaust hole 16a. 15 are provided.
【００２４】ピストン室１０の加圧室１３は導圧管２６
を介して一次側配管２７に連結している。この導圧管２
６には、二次圧力設定用パイロット弁４０、オリフィス
３１、手動操作用弁３０、電動ボール弁２５が上流に向
かって順次設けられている。The pressurizing chamber 13 of the piston chamber 10 is
Is connected to the primary side pipe 27. This impulse line 2
6, a secondary pressure setting pilot valve 40, an orifice 31, a manual operation valve 30, and an electric ball valve 25 are sequentially provided upstream.
【００２５】該パイロット弁４０は常時開で、感圧管２
３を介して二次側配管３４に連結されている。このパイ
ロット弁４０の作動圧力は、必要に応じて適宜な値に設
定されるが、例えば、５Kg／cm2に設定される。The pilot valve 40 is normally open,
3 is connected to the secondary side pipe 34. The operating pressure of the pilot valve 40 is set to an appropriate value as needed, and is set to, for example, 5 kg / cm 2 .
【００２６】次に本実施例の作動について説明する。火
災感知器などの制御手段から開弁信号の受信すると、電
動ボール弁２５が開き、一次側の消火用水は導圧管２６
を通って加圧室１３に入り、制御ピストン１１を押し上
げ、弁主体５を開かせる。この時、加圧室１３内の空気
は脱気孔１５を通って排気室１４に入り、排気管１６か
ら大気に放出される。Next, the operation of this embodiment will be described. When a valve opening signal is received from a control means such as a fire detector, the electric ball valve 25 opens and the primary-side fire-extinguishing water is supplied to the pressure guiding pipe 26.
Through the pressure chamber 13 to push up the control piston 11 to open the valve body 5. At this time, the air in the pressurized chamber 13 enters the exhaust chamber 14 through the deaeration hole 15 and is discharged from the exhaust pipe 16 to the atmosphere.
【００２７】二次側圧力が設定圧力になると、該パイロ
ット弁４０が脱気孔１５を経て排水される水量と同等の
水量を加圧室１３内に供給する開度迄絞られ、設定圧力
を保持する。この時、前記パイロット弁４０の設定圧力
値を一次側圧力より高く設定すると、該弁主体５は全開
するので、圧力損失が非常に小さくなる。When the secondary pressure reaches the set pressure, the pilot valve 40 is throttled down to an opening for supplying an amount of water equivalent to the amount of water drained through the deaeration hole 15 into the pressurizing chamber 13, and the set pressure is maintained. I do. At this time, if the set pressure value of the pilot valve 40 is set higher than the primary pressure, the valve body 5 is fully opened, so that the pressure loss becomes very small.
【００２８】この発明の第２実施例を図２により説明す
るが、この実施例と第１実施例（図１）との相違点は、
導圧管２６に第１排水管４２を連結し、該第１排水管４
２に二次圧力設定用パイロット弁４０を設けたことであ
る。A second embodiment of the present invention will be described with reference to FIG. 2. The difference between this embodiment and the first embodiment (FIG. 1) is as follows.
The first drain pipe 42 is connected to the pressure guiding pipe 26 and the first drain pipe 4
2 is that a secondary pressure setting pilot valve 40 is provided.
【００２９】この発明の第３実施例を図３により説明す
るが、この実施例と第１実施例（図１）との相違点は、
加圧室１３に第２排水管４５を設け、該排水管４５に二
次圧力設定用パイロット弁４０を設けたことである。A third embodiment of the present invention will be described with reference to FIG. 3. The difference between this embodiment and the first embodiment (FIG. 1) is as follows.
The second drain pipe 45 is provided in the pressurizing chamber 13, and the secondary pressure setting pilot valve 40 is provided in the drain pipe 45.
【００３０】この発明の第４実施例を図４〜図６により
説明するが、この実施例では二次圧力設定用パイロット
弁４０の他に、充水感応用パイロット弁２４が設けられ
ている。水噴霧消火設備などの消火用配管に設けられた
弁本体１には、一次流路２と二次流路３とを連通せしめ
る連通口４が設けられている。A fourth embodiment of the present invention will be described with reference to FIGS. 4 to 6. In this embodiment, in addition to the secondary pressure setting pilot valve 40, a plumbing application pilot valve 24 is provided. A valve body 1 provided in a fire extinguishing pipe such as a water spray fire extinguishing facility is provided with a communication port 4 that allows the primary flow path 2 and the secondary flow path 3 to communicate with each other.
【００３１】この連通口４の上縁部には、自動弁主体５
が着座する弁座６が設けられている。この弁主体５はス
プリングＳにより弁座６に圧接されている。この弁主体
５には、テーパ状のスカート部７が設けられている。該
弁主体５を上下方向に移動させその位置を変化させる
と、スカート部７と弁座６との隙間の大きさが変化し、
一次流路２から二次流路３に流入する消火用水の流量を
調整することができる。At the upper edge of the communication port 4, an automatic valve main body 5
There is provided a valve seat 6 on which is seated. The valve body 5 is pressed against the valve seat 6 by a spring S. The valve body 5 is provided with a tapered skirt 7. When the valve main body 5 is moved up and down to change its position, the size of the gap between the skirt portion 7 and the valve seat 6 changes,
The flow rate of the fire extinguishing water flowing from the primary flow path 2 to the secondary flow path 3 can be adjusted.
【００３２】ピストン室１０は前記二次流路３を介して
弁主体５と対向している。このピストン室１０には弁主
体５の受圧面積より大きい表面積の制御ピストン１１が
嵌着されている。この制御ピストン１１は、ステム１２
を介して弁主体５と連結されている。該制御ピストン１
１には脱気孔１５が形成されており、この脱気孔１５に
よりピストン室１０を構成する加圧室１３と排気室１４
とが連通している。The piston chamber 10 faces the valve body 5 via the secondary flow path 3. A control piston 11 having a surface area larger than the pressure receiving area of the valve body 5 is fitted in the piston chamber 10. The control piston 11 has a stem 12
Through the valve body 5. The control piston 1
1 is provided with a deaeration hole 15. The deaeration hole 15 forms a pressurizing chamber 13 and an exhaust chamber 14 that constitute the piston chamber 10.
And are in communication.
【００３３】排気室１４には、排気管１６に連通する排
気孔１６ａが設けられているが、この排気孔１６ａの径
は前記脱気孔１５より大径である。The exhaust chamber 14 is provided with an exhaust hole 16 a communicating with the exhaust pipe 16, and the diameter of the exhaust hole 16 a is larger than that of the deaeration hole 15.
【００３４】加圧室１３には、開度調整用ポジショナ２
１が螺着されている。このポジショナ２１のシリンダ室
２２には、大気開放の排水管１９が連結されている。こ
のシリンダ室２２の開放端には、補助弁の作用をするス
テム１２の端部が挿入されている。The pressurizing chamber 13 has a positioner 2 for adjusting the opening degree.
1 is screwed. A drain pipe 19 that is open to the atmosphere is connected to the cylinder chamber 22 of the positioner 21. The end of the stem 12 acting as an auxiliary valve is inserted into the open end of the cylinder chamber 22.
【００３５】この排水管１９には、充水感応用パイロッ
ト弁２４が設けられている。このパイロット弁２４は常
時開であり、図６に示す様に、フラム室ＦＲのダイアフ
ラムＤＦに固定されている第１バルブＶ１と、該バルブ
Ｖ１を押圧し第１弁座ＶＳ１に押し付けるスプリングＳ
１と、該スプリングＳ１の押圧力を調整するハンドルＨ
と、第２バルブＶ２を押圧し第２弁座ＶＳ２に押し付け
るスプリングＳ２と、を備えている。又、第１バルブＶ
1と第２バルブＶ2の間には隔壁Ｗと、該隔壁Ｗを水密に
貫通したロッドＲ、があり、該ロッドＲの一端は第１バ
ルブに固定され、他端は第２バルブに当接する。このパ
イロット弁２４は感圧管２３を介して二次側配管３４に
連結されている。The drain pipe 19 is provided with a pilot valve 24 for applying a feeling of fullness. The pilot valve 24 is normally open, and as shown in FIG. 6, a first valve V1 fixed to the diaphragm DF of the framing chamber FR, and a spring S which presses the valve V1 and presses it against the first valve seat VS1.
1 and a handle H for adjusting the pressing force of the spring S1.
And a spring S2 for pressing the second valve V2 and pressing it against the second valve seat VS2. Also, the first valve V
Between the first and second valves V2, there is a partition W and a rod R that penetrates the partition W in a watertight manner. One end of the rod R is fixed to the first valve, and the other end contacts the second valve. . The pilot valve 24 is connected to a secondary pipe 34 via a pressure sensing pipe 23.
【００３６】加圧室１３は、電動ボール弁２５の付いた
導圧管２６を介して一次側配管２７に接続されている。
この導圧管２６にはメンテナンス弁２８、ストレーナ２
９、手動操作用弁３０、二次圧力設定用パイロット弁４
０及び流量制御オリフィス３１が、下流に向かって順次
設けられている。この二次圧力設定用パイロット弁４０
は前記感圧管２３に連通しており、その構造は前記充水
感応用パイロット弁２４と同一である。The pressurizing chamber 13 is connected to a primary pipe 27 via a pressure guiding tube 26 having an electric ball valve 25.
A maintenance valve 28 and a strainer 2
9. Valve 30 for manual operation, pilot valve 4 for secondary pressure setting
0 and a flow control orifice 31 are sequentially provided downstream. This secondary pressure setting pilot valve 40
Is connected to the pressure sensing tube 23, and its structure is the same as that of the pilot valve 24.
【００３７】次に、本実施例の作動について説明する。
まず、火災時等に弁主体５を開く場合について説明す
る。火災感知器などの制御手段からの指示により電動ボ
ール弁２５を開くと、一次側配管２７内の消火用水は二
次圧力設定用パイロット弁４０、オリフィス３１を経て
ピストン室１０の加圧室１３内に加圧給水される。Next, the operation of this embodiment will be described.
First, a case where the valve main body 5 is opened in a fire or the like will be described. When the electric ball valve 25 is opened in accordance with an instruction from a control means such as a fire detector, the fire extinguishing water in the primary side pipe 27 flows through the secondary pressure setting pilot valve 40 and the orifice 31 into the pressurizing chamber 13 of the piston chamber 10. Is pressurized and supplied.
【００３８】この消火用水は加圧室１３内の空気を脱気
孔１５から排気室１４に排出させると共に、排気管１６
を介して機外に排出される。脱気孔１５の径をオリフィ
ス３１の径より小さく形成することにより、機外に排出
される水量を給水量に比べて少なくなるように設計して
いるので、加圧室１３内に圧力が発生する。The fire extinguishing water discharges the air in the pressurized chamber 13 from the deaeration hole 15 to the exhaust chamber 14 and the exhaust pipe 16
Is discharged out of the machine. By forming the diameter of the deaeration hole 15 smaller than the diameter of the orifice 31, the amount of water discharged outside the machine is designed to be smaller than the amount of water supplied, so that pressure is generated in the pressurizing chamber 13. .
【００３９】制御ピストン１１の受圧面積は、弁主体５
のそれより大きく形成され、例えば、弁主体５と制御ピ
ストン１１の面積比は、１：１．８に形成されているの
で、加圧室１３内の圧力が一次側圧力の約６割に達した
段階から自動弁主体５が矢印Ａ５方向に動き始める。The pressure receiving area of the control piston 11 is
For example, since the area ratio between the valve body 5 and the control piston 11 is formed to be 1: 1.8, the pressure in the pressurizing chamber 13 reaches about 60% of the primary side pressure. The automatic valve main body 5 starts to move in the direction of the arrow A5 from this stage.
【００４０】ステム１２はピストン室１０に供給される
消火用水によって開度調整用ポジショナ２１から離れる
位置まで制御ピストン１１を押し上げる。この段階より
ピストン室に供給される消火用水の一部は、脱気孔１５
及び排気管１６を経て排水されると同時に、充水感応用
パイロット弁２４を経て外部に排出されるため、それ以
上ピストン１１を押し上げることが無い構造になってい
る。そのため、弁主体５の開度も開度調整用ポジショナ
２１によって指定され、その位置で二次側へ制限給水す
ることができる。The stem 12 pushes the control piston 11 up to a position away from the opening adjustment positioner 21 by the fire extinguishing water supplied to the piston chamber 10. Part of the fire extinguishing water supplied to the piston chamber from this stage is
In addition, since the water is drained through the exhaust pipe 16 and simultaneously discharged to the outside through the plumbing valve 24, the piston 11 is not further pushed up. Therefore, the opening degree of the valve main body 5 is also specified by the opening adjustment positioner 21, and limited water can be supplied to the secondary side at that position.
【００４１】開度調整用ポジショナ２１はロックナット
で固定されている。一次側供給圧力と制限給水量をベー
スに所謂ＣＶ値を算出し、そのＣＶ値となるように開度
調整用ポジショナ２１をセットすることにより充水時の
流速をコントロールできるが、ここではその詳細な説明
は省略する。The opening adjustment positioner 21 is fixed with a lock nut. The so-called CV value is calculated based on the primary side supply pressure and the limited water supply amount, and the flow rate during water filling can be controlled by setting the opening adjustment positioner 21 so that the CV value is obtained. Detailed description is omitted.
【００４２】弁主体５の二次側配管３４が制限流速で給
水され放水口まで充水されると、その高さに応じた水頭
と制限流速時の配管摩擦損失を加算した圧力が背圧とし
て感圧室２０に発生する。When the secondary pipe 34 of the valve body 5 is supplied with water at the restricted flow rate and is filled with the water discharge port, the pressure obtained by adding the head according to the height and the pipe friction loss at the restricted flow rate is used as the back pressure. It occurs in the pressure sensing chamber 20.
【００４３】その圧力によりダイアフラムＤＦが押圧さ
れると、第１バルブＶ1が第１弁座ＶＳ1から離れるとと
もに、第２バルブＶ2が着座するので、充水感応用パイ
ロット弁２４が閉止させられ、加圧室１３から開度調整
用ポジショナ２１を経ての排水が停止させられる。When the diaphragm DF is pressed by the pressure, the first valve V1 is separated from the first valve seat VS1, and the second valve V2 is seated. Therefore, the pilot valve 24 for applying a feeling of freshness is closed, and Drainage from the pressure chamber 13 through the opening adjustment positioner 21 is stopped.
【００４４】一次側配管２７より電動ボール弁２５、二
次圧力設定用パイロット弁４０及びオリフィス３１を経
てピストン室の加圧室１３に供給された消火用水は、脱
気孔１５、及びピストン室排気管１６を経て外部に排出
されるものの、排出しきれないためピストン１１を押し
上げる。The fire extinguishing water supplied from the primary side pipe 27 to the pressurizing chamber 13 of the piston chamber through the electric ball valve 25, the secondary pressure setting pilot valve 40, and the orifice 31 is supplied to the deaeration hole 15 and the piston chamber exhaust pipe. Although discharged through 16, the piston 11 is pushed up because it cannot be completely discharged.
【００４５】弁主体５の開度は次第に大きくなり、弁の
摩擦抵抗が小さくなるので、二次側配管３４内の圧力が
徐々に高くなり、二次圧力設定用パイロット弁４０の設
定圧力となる。二次側配管３４の充水時の背圧は、放水
口までの配管長と弁主体５との高低差により異なるが、
「配管の摩擦損失計算」によって算出することができ
る。充水感応用パイロット弁２４はハンドルＨを回転す
ることにより設定圧を調整することができる。The opening degree of the valve body 5 gradually increases, and the frictional resistance of the valve decreases. Therefore, the pressure in the secondary pipe 34 gradually increases, and reaches the set pressure of the secondary pressure setting pilot valve 40. . The back pressure at the time of filling the secondary side pipe 34 varies depending on the length of the pipe to the water outlet and the height difference between the valve body 5 and
It can be calculated by "calculation of pipe friction loss". The set pressure can be adjusted by rotating the handle H of the pilot valve 24 with the feeling of freshness.
【００４６】弁主体５の二次側配管３４が二次圧力設定
用パイロット弁４０の設定圧力に達した段階で、該パイ
ロット弁４０のダイアラムＤＦは第１バルブＶ1を第１
弁座ＶＳ1から離すので、第２バルブＶ2は脱気孔１５を
経て排気室１４の排気管１６から排水される量と同量の
給水量となるように絞り込まれる。そのことにより弁主
体５の開度は制御され、弁主体の二次側圧力は防消火設
備の所要圧力に調整することができる。二次圧力設定用
パイロット弁４０はロックナットで固定されているの
で、設定圧力の調整は容易である。When the secondary pipe 34 of the valve body 5 reaches the set pressure of the secondary pressure setting pilot valve 40, the diaphragm DF of the pilot valve 40 sets the first valve V1 to the first valve V1.
Since the second valve V2 is separated from the valve seat VS1, the second valve V2 is throttled so as to have the same water supply amount as the amount drained from the exhaust pipe 16 of the exhaust chamber 14 via the deaeration hole 15. Thereby, the opening degree of the valve main body 5 is controlled, and the secondary pressure of the valve main body can be adjusted to the required pressure of the fire-extinguishing equipment. Since the secondary pressure setting pilot valve 40 is fixed with a lock nut, adjustment of the set pressure is easy.
【００４７】この開放弁の特徴は、圧力損失が従来例に
比べ非常に少ないことであり、例えば弁口径１００（m
m）、最大流量１５７０（Ｌ／min.）時の圧力損失は
３．６１（ｍ）、弁口径３５０（mm）、最大流量１６３
３０（Ｌ／min.）時の圧力損失は２．９５（ｍ）と予想
される。The feature of this opening valve is that the pressure loss is very small as compared with the conventional example.
m), the pressure loss at the maximum flow rate of 1570 (L / min.) is 3.61 (m), the valve diameter is 350 (mm), and the maximum flow rate is 163.
The pressure loss at 30 (L / min.) Is expected to be 2.95 (m).
【００４８】次に自動弁１を閉じる場合について説明す
る。電動ボール弁２５及び手動操作弁３０を閉じると、
一次側配管２７内の消火用水は加圧室１３内への流入を
停止する。Next, a case where the automatic valve 1 is closed will be described. When the electric ball valve 25 and the manually operated valve 30 are closed,
The fire extinguishing water in the primary pipe 27 stops flowing into the pressurized chamber 13.
【００４９】そうすると、加圧室１３内の消火用水は、
脱気孔１５を通って排気室に移動し、該加圧室１３の容
積が次第に減少する。Then, the fire extinguishing water in the pressurized chamber 13 is
It moves to the exhaust chamber through the degassing hole 15 and the volume of the pressurizing chamber 13 gradually decreases.
【００５０】同時に、一次流路２内の水圧及びスプリン
グＳの弾力が加わって、弁主体５は次第に矢印Ａ５方向
と逆方向に押圧されながら弁座６に着座するので、全閉
状態となる。At the same time, the water pressure in the primary flow path 2 and the elasticity of the spring S are applied, and the valve body 5 is seated on the valve seat 6 while being gradually pressed in the direction opposite to the direction of arrow A5, so that the valve body 5 is fully closed.
【００５１】なお、充水感応用パイロット弁２４は二次
側配管３４内の圧力が設定圧力より低くなると開放さ
れ、加圧室１３内の消火用水は大気中に放出される。When the pressure in the secondary pipe 34 becomes lower than the set pressure, the plumbing valve 24 is opened, and the fire extinguishing water in the pressurizing chamber 13 is released to the atmosphere.
【００５２】[0052]
【発明の効果】この発明は、以上の様に構成したので、
次のような顕著な効果を奏する。 （１）二次圧力設定用パイロット弁を設けたので、二次
側圧力を任意の値に調整することができる。 （２）充水感応用パイロット弁を設けたので、二次側配
管の充水完了前は弁主体の開度を制限し、二次側配管の
充水完了後に弁主体を全開にすることができる。そのた
め、ウォータハンマ現象の発生を防止することができ
る。The present invention has been configured as described above.
It has the following remarkable effects. (1) Since the secondary pressure setting pilot valve is provided, the secondary pressure can be adjusted to an arbitrary value. (2) Because of the provision of a plumbing application valve, it is possible to limit the opening of the valve body before the secondary pipe is completely filled, and to fully open the valve body after the secondary pipe is completely filled. it can. Therefore, the occurrence of the water hammer phenomenon can be prevented.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の第１実施例を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
【図２】本発明の第２実施例を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing a second embodiment of the present invention.
【図３】本発明の第３実施例を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a third embodiment of the present invention.
【図４】本発明の第４実施例を示す縦断面図で閉弁状態
を示す図である。FIG. 4 is a longitudinal sectional view showing a fourth embodiment of the present invention, showing a valve closed state.
【図５】開弁状態を示す縦断面図である。FIG. 5 is a longitudinal sectional view showing a valve open state.
【図６】充水感応用パイロット弁を示す拡大断面図であ
る。FIG. 6 is an enlarged cross-sectional view illustrating a pilot valve applied with a feeling of freshness.
１ 弁本体 ４ 連通口 ５ 弁主体 １０ ピストン室 １１ 制御ピストン １２ ステム １３ 加圧室 １５ 脱気孔 １６ａ 排気孔 ２３ 感圧管 ２４ 感応用パイロット弁 ２６ 導圧管 ２７ 一次側配管 ３４ 二次側配管 ４０ 二次圧力設定用パイロット弁 DESCRIPTION OF SYMBOLS 1 Valve main body 4 Communication port 5 Valve main body 10 Piston chamber 11 Control piston 12 Stem 13 Pressurization chamber 15 Deaeration hole 16a Exhaust hole 23 Pressure sensing tube 24 Sensitive pilot valve 26 Pressure guiding tube 27 Primary piping 34 Secondary piping 40 Secondary Pilot valve for pressure setting
Claims (6)
閉する弁主体と、ピストン室に装着され前記弁主体に連
結された制御ピストンと、該ピストン室の加圧室と該弁
主体の一次側とを連結する導圧管と、を備えた消火設備
であって；該導圧管に二次圧力設定用パイロット弁を設
け、該パイロット弁を弁主体の二次側に連結したことを
特徴とする消火設備の自動弁。1. A valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a control piston mounted in a piston chamber and connected to the valve body, a pressurizing chamber of the piston chamber, and the valve body. And a pressure guiding pipe connecting the primary side of the fire extinguisher, characterized in that a pilot valve for setting a secondary pressure is provided in the pressure guiding pipe, and the pilot valve is connected to a secondary side mainly composed of the valve. Automatic fire extinguisher valve.
閉する弁主体と、ピストン室に装着され前記弁主体に連
結された制御ピストンと、該ピストン室の加圧室と該弁
主体の一次側とを連結する導圧管と、を備えた消火設備
であって；該導圧管に第１排水管を連結し、該第１排水
管に二次圧力設定用パイロット弁を設け、該パイロット
弁を弁主体の二次側に連結したことを特徴とする消火設
備の自動弁。2. A valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a control piston mounted in a piston chamber and connected to the valve body, a pressurizing chamber of the piston chamber, and the valve body. A pressure guiding pipe connecting the primary side of the fire extinguisher; a first drain pipe connected to the pressure guiding pipe, a pilot valve for setting a secondary pressure provided in the first drain pipe, Automatic valve for fire extinguishing equipment, characterized in that the valve is connected to the secondary side of the valve.
閉する弁主体と、ピストン室に装着され前記弁主体に連
結された制御ピストンと、該ピストン室の加圧室と該弁
主体の一次側とを連結する導圧管と、を備えた消火設備
であって；該ピストン室の加圧室に第２排水管を接続
し、該第２排水管に二次圧力設定用パイロット弁を設
け、該パイロット弁を弁主体の二次側に連結したことを
特徴とする消火設備の自動弁。3. A valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a control piston mounted in a piston chamber and connected to the valve body, a pressurizing chamber of the piston chamber and the valve body. And a pressure guiding pipe connecting the primary side of the piston chamber; a second drain pipe is connected to the pressurizing chamber of the piston chamber, and a secondary pressure setting pilot valve is connected to the second drain pipe. An automatic valve for fire extinguishing equipment, wherein the pilot valve is connected to a secondary side of a valve main body.
閉する弁主体と、該弁主体と二次流路を介して対向する
ピストン室と、該ピストン室に装着され前記弁主体に連
結された制御ピストンと、該ピストン室の加圧室と該弁
主体の一次側とを連結する導圧管と、を備えた消火設備
であって；該ピストン室の加圧室に排水管を連結し、該
排水管に充水感応用パイロット弁を設けるとともに、該
パイロット弁を前記弁主体の二次側に連結し、 該導圧管に二次圧力設定用パイロット弁を設け、該パイ
ロット弁を弁主体の二次側に連結したことを特徴とする
消火設備の自動弁。4. A valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a piston chamber opposed to the valve body via a secondary flow path, and a valve body mounted in the piston chamber and connected to the valve body. A fire extinguishing system comprising: a connected control piston; and a pressure guiding tube connecting a pressurizing chamber of the piston chamber and a primary side of the valve body; and connecting a drain pipe to the pressurizing chamber of the piston chamber. A drainage pipe is provided with a plumbing application pilot valve, the pilot valve is connected to a secondary side of the valve main body, a pilot valve for setting a secondary pressure is provided in the pressure guiding pipe, and the pilot valve is valved. Automatic valve for fire extinguishing equipment, connected to the secondary side of the main body.
閉する弁主体と、該弁主体と二次流路を介して対向する
ピストン室と、該ピストン室に装着され前記弁主体に連
結された制御ピストンと、該ピストン室の加圧室と該弁
主体の一次側とを連結する導圧管と、を備えた消火設備
であって；該ピストン室の加圧室に排水管を連結し、該
排水管に充水感応用パイロット弁を設けるとともに、該
パイロット弁を前記弁主体の二次側に連結し、 該導圧管に第１排水管を連結し、該第１排水管に二次圧
力設定用パイロット弁を設け、該パイロット弁を弁主体
の二次側に連結したことを特徴とする消火設備の自動
弁。5. A valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a piston chamber opposed to the valve body via a secondary flow path, and a valve body mounted in the piston chamber and connected to the valve body. A fire extinguishing system comprising: a connected control piston; and a pressure guiding tube connecting a pressurizing chamber of the piston chamber and a primary side of the valve body; and connecting a drain pipe to the pressurizing chamber of the piston chamber. The drain pipe is provided with a plumbing pilot valve, the pilot valve is connected to a secondary side of the valve main body, a first drain pipe is connected to the pressure guiding pipe, and a second drain pipe is connected to the first drain pipe. An automatic valve for fire extinguishing equipment, comprising: a pilot valve for setting a next pressure, wherein the pilot valve is connected to a secondary side of a valve main body.
閉する弁主体と、該弁主体と二次流路を介して対向する
排気孔付ピストン室と、該ピストン室に装着され前記弁
主体に連結された脱気孔付制御ピストンと、該ピストン
室の加圧室と該弁主体の一次側とを連結する電動弁付導
圧管と、を備えた消火設備であって；該ピストン室の加
圧室に大気開放の排水管を連結し、該排水管に充水感応
用パイロット弁を設けるとともに、該パイロット弁を感
圧管を介して前記弁主体の二次側に連結し、 該導圧管に二次圧力設定用パイロット弁を設け、該パイ
ロット弁を前記感圧管に連結したことを特徴とする消火
設備の自動弁。6. A valve body for opening and closing a communication port of a valve body provided in a fire extinguishing pipe, a piston chamber with an exhaust hole opposed to the valve body via a secondary flow path, and said piston chamber being attached to said piston chamber. A fire extinguishing system comprising: a control piston having a deaeration hole connected to a valve main body; and a pressure guiding pipe with an electric valve connecting a pressurizing chamber of the piston chamber and a primary side of the valve main body; A drain pipe open to the atmosphere is connected to the pressurizing chamber, and a pilot valve is applied to the drain pipe, and the pilot valve is connected to the secondary side of the valve main body via a pressure-sensitive pipe. An automatic valve for fire extinguishing equipment, wherein a pilot valve for setting a secondary pressure is provided on a pressure pipe, and the pilot valve is connected to the pressure-sensitive pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08130697A JP3861253B2 (en) | 1997-03-31 | 1997-03-31 | Automatic valves for fire extinguishing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08130697A JP3861253B2 (en) | 1997-03-31 | 1997-03-31 | Automatic valves for fire extinguishing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10272202A true JPH10272202A (en) | 1998-10-13 |
| JP3861253B2 JP3861253B2 (en) | 2006-12-20 |
Family
ID=13742722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08130697A Expired - Fee Related JP3861253B2 (en) | 1997-03-31 | 1997-03-31 | Automatic valves for fire extinguishing equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3861253B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003079757A (en) * | 2001-09-10 | 2003-03-18 | Koguma Kikai Kk | Branching device for fire-fighting hose |
| JP2007152140A (en) * | 2001-03-30 | 2007-06-21 | Nohmi Bosai Ltd | Water spraying and sprinkling system inside tunnel |
| JP2007203103A (en) * | 2001-03-30 | 2007-08-16 | Nohmi Bosai Ltd | Water spraying and water sprinkling facility in tunnel |
| JP2007330394A (en) * | 2006-06-13 | 2007-12-27 | Nohmi Bosai Ltd | Sprinkler fire-extinguishing equipment |
| JP2012179165A (en) * | 2011-02-28 | 2012-09-20 | Mitsubishi Heavy Ind Ltd | Fluid conduit opening speed restriction valve, and fire extinguishing device and ship using the same |
| KR101723508B1 (en) * | 2016-10-13 | 2017-04-05 | 주식회사 바램 | Control valve system for preventing water hammer |
| CN107246498A (en) * | 2017-07-26 | 2017-10-13 | 中国长江电力股份有限公司 | A kind of water system pressure-reducing valve double guide's valve control systems and control method |
-
1997
- 1997-03-31 JP JP08130697A patent/JP3861253B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007152140A (en) * | 2001-03-30 | 2007-06-21 | Nohmi Bosai Ltd | Water spraying and sprinkling system inside tunnel |
| JP2007203103A (en) * | 2001-03-30 | 2007-08-16 | Nohmi Bosai Ltd | Water spraying and water sprinkling facility in tunnel |
| JP2003079757A (en) * | 2001-09-10 | 2003-03-18 | Koguma Kikai Kk | Branching device for fire-fighting hose |
| JP2007330394A (en) * | 2006-06-13 | 2007-12-27 | Nohmi Bosai Ltd | Sprinkler fire-extinguishing equipment |
| JP2012179165A (en) * | 2011-02-28 | 2012-09-20 | Mitsubishi Heavy Ind Ltd | Fluid conduit opening speed restriction valve, and fire extinguishing device and ship using the same |
| KR101723508B1 (en) * | 2016-10-13 | 2017-04-05 | 주식회사 바램 | Control valve system for preventing water hammer |
| CN107246498A (en) * | 2017-07-26 | 2017-10-13 | 中国长江电力股份有限公司 | A kind of water system pressure-reducing valve double guide's valve control systems and control method |
| CN107246498B (en) * | 2017-07-26 | 2023-10-20 | 中国长江电力股份有限公司 | Double pilot valve control system and control method for pressure reducing valve of water supply system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3861253B2 (en) | 2006-12-20 |
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