JP2012245210A - Foam fire-extinguishing agent mixing apparatus of pressure proportioner system - Google Patents

Foam fire-extinguishing agent mixing apparatus of pressure proportioner system Download PDF

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JP2012245210A
JP2012245210A JP2011120199A JP2011120199A JP2012245210A JP 2012245210 A JP2012245210 A JP 2012245210A JP 2011120199 A JP2011120199 A JP 2011120199A JP 2011120199 A JP2011120199 A JP 2011120199A JP 2012245210 A JP2012245210 A JP 2012245210A
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water
extinguishing agent
foam
side orifice
foam fire
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JP5755028B2 (en
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Kenji Oki
健二 大木
Emi Kawai
恵美 河井
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Nippon Dry Chemical Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a foam fire-extinguishing agent mixing apparatus of pressure proportioner system which has less deviation of mixing ratio caused by change in temperature and which is also suitable for mixing foam fire-extinguishing agent called a low concentration type.SOLUTION: The foam fire-extinguishing agent mixing apparatus of pressure proportioner system includes: a water side orifice 5 that controls a flow rate of water supplied by water piping 4; a water introducing pipe 7 that is installed branched from the water piping 4 on the upstream side of the water side orifice 5 and that pressurizes a foam fire-extinguishing agent by feeding water into a storage tank 6 for the foam fire-extinguishing agent; a foam fire-extinguishing agent delivery pipe 10 that delivers, to a merging part 9 installed in the water piping 4 situated in the downstream side of the water side orifice 5, the foam fire-extinguishing agent delivered by pressurization of the inside of the foam fire-extinguishing agent storage tank 6 by the introduced water and that makes it merge with the water having passed through the water side orifice 5; a foam fire-extinguishing agent side orifice 13 that controls the flow rate of the foam fire-extinguishing agent delivered by the pressurization of the inside of the foam fire-extinguishing agent storage tank 6; and foam water solution piping 11 that delivers the foam water solution formed by the merging part 9, wherein the foam fire-extinguishing agent side orifice 13 is installed in the water introducing pipe 7.

Description

本発明は、送水ポンプから圧送されてくる水の一部を泡消火薬剤貯蔵タンクに導入し、該泡消火薬剤貯蔵タンクに貯蔵されている泡消火薬剤を押し出して前記水と合流させることによって、泡水溶液を生成するプレッシャー・プロポーショナー方式の泡消火薬剤混合装置に関するものである。   The present invention introduces a part of the water pumped from the water pump into the foam extinguishing agent storage tank, and extrudes the foam extinguishing agent stored in the foam extinguishing agent storage tank to join the water, The present invention relates to a pressure-proportional foam extinguishing agent mixing apparatus for generating a foam aqueous solution.

泡消火薬剤混合装置として、送水配管に水の流量を制御する水側オリフィスが設けられ、水側オリフィスの上流側の送水配管には、泡消火薬剤貯蔵タンク内に水を送り込む水導入管が送水配管から分岐して設けられ、泡消火薬剤貯蔵タンク内に導入された水の圧力を利用し、泡消火薬剤貯蔵タンク内の泡消火薬剤と水とを直接加圧方式やダイヤフラム加圧方式といった加圧方式により置換させて泡消火薬剤を押し出し、押し出された泡消火薬剤を泡消火薬剤送出管により前記水側オリフィスの下流側の送水配管に設けられた合流部に送り出して前記水側オリフィスを通過してきた水と合流させ泡水溶液を生成する、プレッシャー・プロポーショナー方式の泡消火薬剤混合装置が知られている。
泡消火薬剤送出管には泡消火薬剤貯蔵タンク内から送り出される泡消火薬剤の流量を制御する泡消火薬剤側オリフィスが設けられ、水側オリフィスと泡消火薬剤側オリフィスにより水と泡消火薬剤の混合率に応じて水の流量と泡消火薬剤の流量が制御されるようになっている（例えば、公知文献１参照。）。 As a foam fire-extinguishing chemical mixing device, a water-side orifice that controls the flow rate of water is provided in the water supply pipe, and a water introduction pipe that feeds water into the foam fire-extinguishing chemical storage tank supplies water to the water supply pipe upstream of the water-side orifice. Using the pressure of water introduced into the foam extinguishing agent storage tank, which is branched from the pipe, the foam extinguishing agent and water in the foam extinguishing agent storage tank are added directly by a pressurization method or a diaphragm pressurization method. The foam extinguishing agent is pushed out by the pressure method, and the extruded foam extinguishing agent is sent out to the merging section provided in the water supply pipe downstream of the water side orifice by the foam extinguishing agent delivery pipe and passes through the water side orifice. There has been known a pressure-proportional foam extinguishing agent mixing apparatus that joins with the generated water to generate an aqueous foam solution.
The foam extinguishing agent delivery pipe is provided with a foam extinguishing agent side orifice that controls the flow rate of the foam extinguishing agent delivered from the foam extinguishing agent storage tank, and the water and foam extinguishing agent side orifices mix water and foam extinguishing agent. The flow rate of water and the flow rate of foam extinguishing agent are controlled according to the rate (see, for example, publicly known document 1).

かかる泡消火薬剤混合装置では、水側オリフィスと泡消火薬剤側オリフィスにより水と泡消火薬剤の混合率に応じて水の流量と泡消火薬剤の流量を制御しているが、水と泡消火薬剤は温度によってそれぞれの粘度が異なるため、設計標準温度を設定し、当該温度において生成される泡水溶液の濃度（水と泡消火薬剤の混合割合）が所定の値になるように水側オリフィスと泡消火薬剤側オリフィスのオリフィス径を決定するといったことが一般に行われている。   In such a foam extinguishing agent mixing device, the water flow rate and the foam extinguishing agent flow rate are controlled by the water-side orifice and the foam extinguishing agent-side orifice in accordance with the mixing ratio of water and the foam extinguishing agent. Since the viscosity varies depending on the temperature, the design standard temperature is set, and the water-side orifice and foam are set so that the concentration of the aqueous foam solution (mixing ratio of water and foam) at the temperature becomes a predetermined value. In general, the orifice diameter of the extinguishing agent side orifice is determined.

平成１７年１１月１１日、危険物保安技術協会発行、「屋外タンク貯蔵所の泡消火設備の一体的な点検に係る講習テキスト」November 11, 2005, issued by the Dangerous Goods Safety Technology Association, “Lecture text on integrated inspection of foam fire extinguishing equipment at outdoor tank storage”

しかしながら、従来のプレッシャー・プロポーショナー方式の泡消火薬剤混合装置では、温度変化すれば水と泡消火薬剤の粘度が変化するものであり、現実の温度が設定した設計標準温度と異なると、設計標準温度でオリフィス径が決定された水側オリフィスと泡消火薬剤側オリフィスによる水と泡消火薬剤の流量も異なることになり、両者の混合率に狂いが生じることになる。
このことを見越して、水と泡消火薬剤の混合率に幅を持たせた混合率範囲を設定するケースがあり、例えば、６％型（混合率６％）で６．０〜８．０％、３％型（混合率３％）で３．０〜４．０％、１％型（混合率１３％）で１．０〜１．３％の範囲に設定されている。
しかし、混合率１％型のような、一般に低濃度型とよばれる泡消火薬剤の混合は混合率範囲が狭く、混合率範囲内の混合が非常に困難であった。そこで、泡消火薬剤側オリフィスとして、特殊な流量制御方法、例えば、温度変化に応じてオリフィス径が変化するばね仕掛けの可変オリフィス等を用いるものもあるが、故障が多く、維持管理が面倒であるといった問題点があった。 However, with the conventional pressure-proportional foam extinguishing agent mixing device, the viscosity of water and the foam extinguishing agent changes as the temperature changes. If the actual temperature differs from the set design standard temperature, the design standard The flow rates of the water and the foam extinguishing agent from the water-side orifice and the foam-extinguishing agent-side orifice, whose orifice diameters are determined by the temperature, will also be different, and the mixing ratio of both will be distorted.
In anticipation of this, there is a case where a mixing ratio range in which the mixing ratio of water and the foam extinguishing agent is widened is set. For example, in the 6% type (mixing ratio 6%), 6.0 to 8.0% It is set in the range of 3.0 to 4.0% for the 3% type (mixing rate 3%) and 1.0 to 1.3% for the 1% type (mixing rate 13%).
However, mixing of a foam extinguishing agent generally called a low-concentration type, such as a 1% mixing rate type, has a narrow mixing rate range, and mixing within the mixing rate range is very difficult. Therefore, as a foam extinguishing agent side orifice, there is a special flow rate control method, for example, a spring-mounted variable orifice whose diameter changes according to temperature change, etc., but there are many troubles and maintenance is troublesome. There was a problem.

本発明の目的は、温度変化による混合率の狂いが少なく、低濃度型とよばれる泡消火薬剤の混合にも適したプレッシャー・プロポーショナー方式の泡消火薬剤混合装置を提供することにある。   An object of the present invention is to provide a pressure-proportional type foam extinguishing agent mixing apparatus that is less likely to cause a variation in mixing ratio due to temperature change and is also suitable for mixing a foam extinguishing agent called a low concentration type.

本発明の他の目的は、泡消火薬剤側オリフィスとして故障が少なく、維持管理が容易なプレッシャー・プロポーショナー方式の泡消火薬剤混合装置を提供することにある。   Another object of the present invention is to provide a pressure-proportional foam-extinguishing agent mixing device that has few failures and is easy to maintain as a foam-extinguishing agent-side orifice.

上記の目的を達成するために、請求項１に記載の発明は、送水配管で送られてくる水の流量を制御する水側オリフィスと、前記水側オリフィスの上流側の前記送水配管から分岐して設けられ泡消火薬剤貯蔵タンク内に水を送り込んで前記泡消火薬剤貯蔵タンク内の泡消火薬剤を加圧する水導入管と、導入された水による前記泡消火薬剤貯蔵タンク内の加圧によって送出された前記泡消火薬剤を前記水側オリフィスの下流側に位置する前記送水配管に設けられた合流部に送り出して前記水側オリフィスを通過してきた水と合流させる泡消火薬剤送出管と、前記泡消火薬剤貯蔵タンク内の加圧によって送出される前記泡消火薬剤の流量を制御する泡消火薬剤側オリフィスと、前記合流部で生成された泡水溶液を送出する泡水溶液配管とを備えたプレッシャー・プロポーショナー方式の泡消火薬剤混合装置において、前記泡消火薬剤側オリフィスは前記水導入管に設けられていることを特徴とする。   In order to achieve the above-mentioned object, the invention according to claim 1 is branched from a water-side orifice for controlling a flow rate of water sent by the water-feeding pipe and the water-feeding pipe upstream of the water-side orifice. A water introduction pipe for feeding water into the foam fire extinguishing agent storage tank and pressurizing the foam fire extinguishing agent storage tank and pressurizing the foam fire extinguishing agent storage tank by the introduced water A foam extinguishing agent delivery pipe for sending out the foam extinguishing agent sent to a joining portion provided in the water supply pipe located downstream of the water side orifice and joining the water passing through the water side orifice; A foam equipped with a foam extinguishing agent side orifice for controlling the flow rate of the foam extinguishing agent delivered by pressurization in the extinguishing agent storage tank, and a foam aqueous solution pipe for delivering the foam aqueous solution generated at the junction. In foam drug mixing system of Fischer-proportioner system, the fire-extinguishing foams side orifice and being provided to the water inlet pipe.

請求項１に記載のプレッシャー・プロポーショナー方式の泡消火薬剤混合装置によれば、前記泡消火薬剤側オリフィスが前記水導入管に設けられているので、前記水導入管を通る水は、前記水導入管に設けられた前記泡消火薬剤側オリフィスにより所定の流量に制御されて前記泡消火薬剤貯蔵タンク内に導入されることになり、当該導入された水の量と同じ量の泡消火薬剤を送り出すことができる。このようにして泡消火薬剤の流量を制御する水は、泡消火薬剤と比較して温度変化による粘度の変化が著しく小さいことから、温度変化による水と泡消火薬剤の混合率の狂いが少なく、低濃度型とよばれる泡消火薬剤の混合にも有効に用いることができる。
また、前記泡消火薬剤オリフィスは通過面積が固定された一般的なオリフィスのみを用いて低濃度型とよばれる泡消火薬剤の混合にも有効に用いることができるので、ばね仕掛けの可変オリフィス等の特殊な流量制御方法に比べ、低コストで得られ、故障が少なく、維持管理が容易となる。さらに、オリフィスを交換することのみで、濃度の異なる泡消火薬剤への換装が容易となる。 According to the pressure-proportional foam extinguishing agent mixing apparatus according to claim 1, since the foam extinguishing agent side orifice is provided in the water introduction pipe, the water passing through the water introduction pipe is the water The foam extinguishing agent side orifice provided in the introduction pipe is controlled to have a predetermined flow rate and is introduced into the foam extinguishing agent storage tank. Can be sent out. The water that controls the flow rate of the foam extinguishing agent in this way has a remarkably small change in viscosity due to a temperature change compared to the foam extinguishing agent, so there is little deviation in the mixing ratio of water and the foam extinguishing agent due to the temperature change, It can also be used effectively for mixing foam extinguishing agents called low-concentration types.
Further, the foam extinguishing agent orifice can be used effectively for mixing a foam extinguishing agent called a low-concentration type by using only a general orifice having a fixed passage area. Compared to a special flow control method, it can be obtained at low cost, has few failures, and is easy to maintain. Furthermore, it is easy to replace the foam with different foam extinguishing agents only by exchanging the orifices.

本発明に係るプレッシャー・プロポーショナー方式の泡消火薬剤混合装置を実施するための形態の一例を示す概略構成図である。It is a schematic block diagram which shows an example of the form for implementing the pressure-proportional foam extinguishing agent mixing apparatus which concerns on this invention.

以下、本発明に係るプレッシャー・プロポーショナー方式の泡消火薬剤混合装置の実施の形態の一例を図１を参照して詳細に説明する。   Hereinafter, an example of an embodiment of a pressure-proportional foam extinguishing agent mixing apparatus according to the present invention will be described in detail with reference to FIG.

本例のプレッシャー・プロポーショナー方式の泡消火薬剤混合装置１は、水源水槽２からポンプ３で汲み上げられた水を圧送する送水配管４に、後述する泡消火薬剤と混合する水の流量を制御する水側オリフィス５が設けられている。   The pressure-proportional foam extinguishing agent mixing apparatus 1 of this example controls the flow rate of water to be mixed with a foam extinguishing agent, which will be described later, into a water supply pipe 4 that pumps water pumped up from a water source water tank 2 by a pump 3. A water-side orifice 5 is provided.

この水側オリフィス５の上流側で送水配管４には、泡消火薬剤貯蔵タンク６内に水を送り込む水導入管７が送水配管４から分岐して設けられており、水導入管７を通して泡消火薬剤貯蔵タンク６内に導入された水の圧力を利用し、泡消火薬剤貯蔵タンク６内の泡消火薬剤を加圧して泡消火薬剤と水とを置換させて泡消火薬剤を押し出すようになっている。   The water supply pipe 4 upstream of the water-side orifice 5 is provided with a water introduction pipe 7 that branches water from the water supply pipe 4 into the foam extinguishing agent storage tank 6. The pressure of water introduced into the chemical storage tank 6 is used to pressurize the foam fire-extinguishing agent in the foam-extinguishing chemical storage tank 6 to replace the foam-extinguishing chemical and water, thereby extruding the foam-extinguishing chemical. Yes.

泡消火薬剤貯蔵タンク６内に導入された水による泡消火薬剤の加圧方式は、本例ではダイヤフラム加圧方式となっており、泡消火薬剤貯蔵タンク６内に泡消火薬剤を収容したゴム等の素材で形成された袋状のダイヤフラム８が配置され、泡消火薬剤貯蔵タンク６内に導入された水によりダイヤフラム８が外から加圧してダイヤフラム８内に収容されている泡消火薬剤を押し出すようになっている。   The foam fire extinguishing agent pressurizing method with water introduced into the foam extinguishing agent storage tank 6 is a diaphragm pressurizing method in this example, such as rubber containing foam extinguishing agent in the foam extinguishing agent storage tank 6. A bag-like diaphragm 8 made of the above material is disposed, and the diaphragm 8 is pressurized from the outside by water introduced into the foam extinguishing agent storage tank 6 so as to push out the foam extinguishing agent contained in the diaphragm 8. It has become.

ダイヤフラム８内と水側オリフィス５の下流側における送水配管４の合流部９が泡消火薬剤送出管１０で接続され、泡消火薬剤貯蔵タンク６内に導入された水により加圧されてダイヤフラム８内から押し出した泡消火薬剤を、泡消火薬剤送出管１０を通して水側オリフィス５の下流側に位置する送水配管４に設けられた合流部９に送り出して、水側オリフィス５を通過してきた水と合流させ泡水溶液を生成するようになっている。さらに、合流部９には、合流部９で生成された泡水溶液を送出する泡水溶液配管１１が接続されている。泡水溶液配管１１の先端には、泡発生器１２が設けられている。   The confluence 9 of the water supply pipe 4 in the diaphragm 8 and the downstream side of the water-side orifice 5 is connected by a foam fire-extinguishing chemical delivery pipe 10 and pressurized by the water introduced into the foam fire-extinguishing chemical storage tank 6 to be in the diaphragm 8 The foam extinguishing agent pushed out from the water is sent to the joining portion 9 provided in the water supply pipe 4 located downstream of the water-side orifice 5 through the foam-extinguishing agent delivery pipe 10 and merged with the water passing through the water-side orifice 5. To generate an aqueous foam solution. Furthermore, a foam aqueous solution pipe 11 for sending the foam aqueous solution generated at the junction 9 is connected to the junction 9. A foam generator 12 is provided at the tip of the foam aqueous solution pipe 11.

さらに、水側オリフィス５の上流側で送水配管４から分岐して、送水配管４を通る水の一部を泡消火薬剤貯蔵タンク６内に水を送り込む水導入管７には、水と泡消火薬剤の混合率に応じた泡消火薬剤の流量と同量の水を通過させる泡消火薬剤側オリフィス１３が設けられている。   Furthermore, water and bubble extinguishing are provided in the water introduction pipe 7 which branches from the water supply pipe 4 upstream of the water-side orifice 5 and sends a part of the water passing through the water supply pipe 4 into the foam fire extinguishing chemical storage tank 6. A foam fire-extinguishing agent side orifice 13 through which the same amount of water as the flow rate of the foam extinguishing agent according to the mixing ratio of the chemicals passes is provided.

上記のように構成された泡消火薬剤混合装置１では、水源水槽２からポンプ３で汲み上げられた水が送水配管４を圧送されて泡消火薬剤混合装置１に到達すると、送られてきた水は送水配管４に設けられた水側オリフィス５を通過し、泡消火薬剤との混合率に応じた所定の流量に制御されて水側オリフィス５の下流側の送水配管４へ送り出される。   In the foam-extinguishing agent mixing apparatus 1 configured as described above, when the water pumped up from the water source tank 2 by the pump 3 is pumped through the water supply pipe 4 and reaches the foam-extinguishing agent mixing apparatus 1, the sent water is It passes through the water-side orifice 5 provided in the water-feeding pipe 4 and is sent to the water-feeding pipe 4 on the downstream side of the water-side orifice 5 while being controlled to a predetermined flow rate according to the mixing ratio with the foam extinguishing agent.

また、前記送られてきた水の一部は水側オリフィス５による抵抗で、水側オリフィス５の上流側の送水配管４から分岐して設けられた水導入管７に流れる。水導入管７には、水と泡消火薬剤の混合率に応じた泡消火薬剤の流量と同量の水を通過させる泡消火薬剤側オリフィス１３が設けられているので、水導入管７を通る水は泡消火薬剤側オリフィス１３により水との混合率に応じた泡消火薬剤の流量と同じ水量に制御されて泡消火薬剤貯蔵タンク６内に導入される。泡消火薬剤貯蔵タンク６内に導入された水により泡消火薬剤貯蔵タンク６内に配置されているダイヤフラム８が外から加圧してダイヤフラム８内に収容されている泡消火薬剤が押し出され、ダイヤフラム８内から押し出された泡消火薬剤は泡消火薬剤送出管１０を通して水側オリフィス５の下流側に位置する送水配管４に設けられた合流部９に送り出され、ここで水側オリフィス５を通過してきた水と合流して所定の混合率の泡水溶液が生成される。   A part of the sent water flows through a water introduction pipe 7 that is branched from a water supply pipe 4 on the upstream side of the water-side orifice 5 due to resistance by the water-side orifice 5. The water introduction pipe 7 is provided with the foam extinguishing agent side orifice 13 through which the same amount of water as the flow rate of the foam extinguishing agent according to the mixing ratio of water and the foam extinguishing agent is passed. Water is introduced into the foam fire extinguishing agent storage tank 6 by controlling the water amount to be the same as the flow rate of the foam fire extinguishing agent according to the mixing ratio with water by the foam extinguishing agent side orifice 13. The water 8 introduced into the foam extinguishing agent storage tank 6 pressurizes the diaphragm 8 disposed in the foam extinguishing agent storage tank 6 from the outside, and the foam extinguishing agent accommodated in the diaphragm 8 is pushed out. The foam extinguishing agent pushed out from the inside is sent through the foam extinguishing agent delivery pipe 10 to the junction 9 provided in the water supply pipe 4 located downstream of the water side orifice 5, where it has passed through the water side orifice 5. By combining with water, a foam aqueous solution having a predetermined mixing ratio is generated.

このように泡消火薬剤混合装置１によれば、泡消火薬剤側オリフィス１３を水導入管７に設けているので、水導入管７を通る水は、水導入管７に設けられた泡消火薬剤側オリフィス１３により所定の流量に制御されて泡消火薬剤貯蔵タンク６内に導入されることになり、当該導入された水の量と同じ量の泡消火薬剤を送り出すことができる。   Thus, according to the foam fire-extinguishing agent mixing apparatus 1, the foam-extinguishing agent-side orifice 13 is provided in the water introduction pipe 7, so that the water passing through the water introduction pipe 7 is bubble-extinguishing agent provided in the water introduction pipe 7. It is controlled to a predetermined flow rate by the side orifice 13 and is introduced into the foam extinguishing agent storage tank 6, so that the same amount of the foam extinguishing agent as that of the introduced water can be sent out.

このようにして泡消火薬剤の流量を制御する水は、泡消火薬剤と比較して温度変化による粘度の変化が著しく小さいことから、温度変化による水と泡消火薬剤の混合率の狂いが少なく、低濃度型とよばれる泡消火薬剤の混合にも有効に用いることができる。   The water that controls the flow rate of the foam extinguishing agent in this way has a remarkably small change in viscosity due to a temperature change compared to the foam extinguishing agent, so there is little deviation in the mixing ratio of water and the foam extinguishing agent due to the temperature change, It can also be used effectively for mixing foam extinguishing agents called low-concentration types.

また、泡消火薬剤オリフィス１３は通過面積が固定された一般的なオリフィスのみを用いて低濃度型とよばれる泡消火薬剤の混合にも有効に用いることができるので、ばね仕掛けの可変オリフィス等の特殊な流量制御方法に比べ、低コストで得られ、故障が少なく、維持管理が容易となる。さらに、オリフィスを交換することのみで、濃度の異なる泡消火薬剤への換装が容易となる。   Further, the foam extinguishing agent orifice 13 can be used effectively for mixing a foam extinguishing agent called a low-concentration type by using only a general orifice having a fixed passage area. Compared to a special flow control method, it can be obtained at low cost, has few failures, and is easy to maintain. Furthermore, it is easy to replace the foam with different foam extinguishing agents only by exchanging the orifices.

なお、上記実施例では、ダイヤフラム加圧方式のプレッシャー・プロポーショナー方式の泡消火薬剤混合装置に適用した実施例について説明したが、本発明はこれに限定されるものではなく、図示しないが泡消火薬剤貯蔵タンク内の泡消火薬剤を加圧水で直接加圧する直接加圧方式のものにも適用することができる。   In the above-described embodiment, the embodiment applied to the pressure-proportional foam extinguishing chemical mixing device of the diaphragm pressurization type has been described. However, the present invention is not limited to this, but the foam extinguishing is not shown. The present invention can also be applied to a direct pressurization system in which the foam fire extinguishing chemical in the chemical storage tank is directly pressurized with pressurized water.

１ 泡消火薬剤混合装置
２ 水源水槽
３ ポンプ
４ 送水配管
５ 水側オリフィス
６ 泡消火薬剤貯蔵タンク
７ 水導入管
８ ダイヤフラム
９ 合流部
１０ 泡消火薬剤送出管
１１ 泡水溶液配管
１２ 泡発生器
１３ 泡消火薬剤オリフィス DESCRIPTION OF SYMBOLS 1 Foam fire extinguishing agent mixing apparatus 2 Water source tank 3 Pump 4 Water supply piping 5 Water side orifice 6 Foam extinguishing agent storage tank 7 Water introduction pipe 8 Diaphragm 9 Merge part 10 Foam extinguishing agent delivery pipe 11 Foam aqueous solution pipe 12 Foam generator 13 Foam extinguishing Drug orifice

しかしながら、従来のプレッシャー・プロポーショナー方式の泡消火薬剤混合装置では、温度変化すれば水と泡消火薬剤の粘度が変化するものであり、現実の温度が設定した設計標準温度と異なると、設計標準温度でオリフィス径が決定された水側オリフィスと泡消火薬剤側オリフィスによる水と泡消火薬剤の流量も異なることになり、両者の混合率に狂いが生じることになる。
このことを見越して、水と泡消火薬剤の混合率に幅を持たせた混合率範囲を設定するケースがあり、例えば、６％型（混合率６％）で６．０〜８．０％、３％型（混合率３％）で３．０〜４．０％、１％型（混合率１３％）で１．０〜１．３％の範囲に設定されている。
しかし、混合率１％型のような、一般に低濃度型とよばれる泡消火薬剤の混合は混合率範囲が狭く、混合率範囲内の混合が非常に困難であった。そこで、泡消火薬剤側オリフィスとして、特殊な流量制御方法、例えば、温度変化に応じてオリフィス径が変化するばね仕掛けの可変オリフィス等を用いるものもあるが、構造が複雑で、維持管理が面倒であるといった問題点があった。 However, with the conventional pressure-proportional foam extinguishing agent mixing device, the viscosity of water and the foam extinguishing agent changes as the temperature changes. If the actual temperature differs from the set design standard temperature, the design standard The flow rates of the water and the foam extinguishing agent from the water-side orifice and the foam-extinguishing agent-side orifice, whose orifice diameters are determined by the temperature, will also be different, and the mixing ratio of both will be distorted.
In anticipation of this, there is a case where a mixing ratio range in which the mixing ratio of water and the foam extinguishing agent is widened is set. For example, in the 6% type (mixing ratio 6%), 6.0 to 8.0% It is set in the range of 3.0 to 4.0% for the 3% type (mixing rate 3%) and 1.0 to 1.3% for the 1% type (mixing rate 13%).
However, mixing of a foam extinguishing agent generally called a low-concentration type, such as a 1% mixing rate type, has a narrow mixing rate range, and mixing within the mixing rate range is very difficult. Therefore, as the foam extinguishing agent side orifice, there are some which use a special flow control method, for example, a spring-mounted variable orifice whose diameter changes according to temperature change, but the structure is complicated and maintenance is troublesome. There was a problem that there was.

Claims (1)

送水配管で送られてくる水の流量を制御する水側オリフィスと、前記水側オリフィスの上流側の前記送水配管から分岐して設けられ泡消火薬剤貯蔵タンク内に水を送り込んで前記泡消火薬剤貯蔵タンク内の泡消火薬剤を加圧する水導入管と、導入された水による前記泡消火薬剤貯蔵タンク内の加圧によって送出された前記泡消火薬剤を前記水側オリフィスの下流側に位置する前記送水配管に設けられた合流部に送り出して前記水側オリフィスを通過してきた水と合流させる泡消火薬剤送出管と、前記泡消火薬剤貯蔵タンク内の加圧によって送出される前記泡消火薬剤の流量を制御する泡消火薬剤側オリフィスと、前記合流部で生成された泡水溶液を送出する泡水溶液配管とを備えたプレッシャー・プロポーショナー方式の泡消火薬剤混合装置において、
前記泡消火薬剤側オリフィスは前記水導入管に設けられていることを特徴とするプレッシャー・プロポーショナー方式の泡消火薬剤混合装置。 A water-side orifice that controls the flow rate of water sent through the water-feeding pipe, and the foam-extinguishing chemical that is provided by branching from the water-feeding pipe upstream of the water-side orifice to feed water into a foam-extinguishing chemical storage tank. A water introduction pipe for pressurizing the foam fire extinguishing agent in the storage tank; and the foam extinguishing agent sent out by pressurization in the foam extinguishing agent storage tank by the introduced water is located downstream of the water-side orifice. A foam fire-extinguishing agent delivery pipe that joins with water that has passed through the water-side orifice by being sent to a junction provided in a water-feed pipe, and a flow rate of the foam-extinguishing agent that is sent out by pressurization in the foam-extinguishing agent storage tank Pressure-proportional foam extinguishing agent mixing apparatus, comprising a foam extinguishing agent side orifice for controlling the bubble and a foam aqueous solution pipe for delivering the foam aqueous solution generated at the junction Oite,
The foam-extinguishing agent mixing apparatus of the pressure / proportioner type, wherein the foam-extinguishing agent side orifice is provided in the water introduction pipe.
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CN107080911A (en) * 2017-06-08 2017-08-22 太仓苏安消防设备有限公司 A kind of Fire-extinguishing System of Septenary-Fluorine Propane
CN108514702A (en) * 2018-04-10 2018-09-11 谢文皓 A kind of environmentally protective mechanical foam Rapid manufacturing device of high of fire-fighting

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JPH04300564A (en) * 1991-03-28 1992-10-23 Ngk Insulators Ltd Extinguishing agent and extinguishing device
JPH05345045A (en) * 1992-06-16 1993-12-27 Yamato Protec Co Sprinkler apparatus for extinguishing equipment
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JP2016182226A (en) * 2015-03-26 2016-10-20 日本ドライケミカル株式会社 Extinguishment medicine and extinguishment equipment
CN107080911A (en) * 2017-06-08 2017-08-22 太仓苏安消防设备有限公司 A kind of Fire-extinguishing System of Septenary-Fluorine Propane
CN108514702A (en) * 2018-04-10 2018-09-11 谢文皓 A kind of environmentally protective mechanical foam Rapid manufacturing device of high of fire-fighting

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