JP5688431B2 - Booster water supply system - Google Patents

Booster water supply system Download PDF

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JP5688431B2
JP5688431B2 JP2013097723A JP2013097723A JP5688431B2 JP 5688431 B2 JP5688431 B2 JP 5688431B2 JP 2013097723 A JP2013097723 A JP 2013097723A JP 2013097723 A JP2013097723 A JP 2013097723A JP 5688431 B2 JP5688431 B2 JP 5688431B2
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water supply
water
supply device
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pipe
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JP2013147932A (en
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小松　崇秀
崇秀 小松
良男 三宅
良男 三宅
圭太 上井
圭太 上井
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Ebara Corp
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Description

本発明は、オフィスビルやマンションなどの建物に水を供給するための増圧給水システムに関するものである。   The present invention relates to a pressurized water supply system for supplying water to a building such as an office building or a condominium.

オフィスビルやマンションなどの建物に水（水道水）を供給するための装置として給水装置が広く使用されている。この給水装置は、一般に、水を圧送するための遠心ポンプと、この遠心ポンプを駆動するためのモータと、このモータの運転を制御する制御盤とを備えている。遠心ポンプの吸込口は水道管に接続され、水道管により導入された水は遠心ポンプにより昇圧された後、建物内部に設けられた配水管を介して各給水栓に供給される。このような水道管に直結された給水装置は、一般に、直結式給水装置と呼ばれている。   Water supply devices are widely used as devices for supplying water (tap water) to buildings such as office buildings and apartment buildings. This water supply apparatus generally includes a centrifugal pump for pumping water, a motor for driving the centrifugal pump, and a control panel for controlling the operation of the motor. The suction port of the centrifugal pump is connected to a water pipe, and water introduced by the water pipe is boosted by the centrifugal pump and then supplied to each water faucet through a water pipe provided in the building. A water supply apparatus directly connected to such a water pipe is generally called a direct connection type water supply apparatus.

最近では、高層建築物への給水に直結式給水装置を用いた増圧給水システムが使用されつつある。この増圧給水システムは、低層階用の第１の給水装置と、高層階用の第２の給水装置とを備えており、これらは直列に連結されている。第１の給水装置の吸込口は水道管に直結されており、建物の低層階には、この第１の給水装置によって水が供給される。一方、第２の給水装置は建物の中間層階に配置され、第１の給水装置から供給された水を増圧して高層階に供給する。   Recently, a pressurized water supply system using a directly connected water supply system is being used for water supply to high-rise buildings. The pressure-increasing water supply system includes a first water supply device for a lower floor and a second water supply device for a higher floor, which are connected in series. The suction port of the first water supply device is directly connected to the water pipe, and water is supplied to the lower floor of the building by the first water supply device. On the other hand, a 2nd water supply apparatus is arrange | positioned at the intermediate | middle floor of a building, the pressure supplied from the 1st water supply apparatus is increased, and it supplies to a high floor.

給水装置においては、ポンプから吐き出された水の逆流を防止するために、ポンプの吐出側に逆止弁を設けることが義務付けられている。上述した増圧給水システムにおいては、高層階から低層階への水の逆流は、高層階用の第２の給水装置に設けられた逆止弁により防止される。しかしながら、この逆止弁が異物の噛み込みなどにより故障した場合、建物の配管内のすべての水の圧力を第１の給水装置が受けることとなる。その結果、第１の給水装置や配管が高背圧により破損するおそれがある。   In a water supply apparatus, in order to prevent the backflow of the water discharged from the pump, it is obliged to provide a check valve on the discharge side of the pump. In the above-described pressurized water supply system, the backflow of water from the higher floor to the lower floor is prevented by a check valve provided in the second water supply device for the higher floor. However, when this check valve breaks down due to a foreign object or the like, the first water supply device receives the pressure of all the water in the piping of the building. As a result, there is a possibility that the first water supply device and the piping may be damaged by the high back pressure.

また、２つの給水装置を持つ増圧給水システムにおいては、それぞれが独立して運転されるため、次のような問題が起こりうる。すなわち、第１の給水装置が停止している状態で第２の給水装置が運転されると、第１の給水装置と第２の給水装置とを連結する配水管に負圧が形成されることがある。この状態で、配水管に連通する給水栓が開かれると、その給水栓から空気が吸い込まれてしまう。   Moreover, in the pressure increase water supply system which has two water supply apparatuses, since each operates independently, the following problems may arise. That is, when the second water supply device is operated in a state where the first water supply device is stopped, a negative pressure is formed in the water distribution pipe that connects the first water supply device and the second water supply device. There is. In this state, when the water tap connected to the water pipe is opened, air is sucked from the water tap.

特開２００８−２２３２６９号公報JP 2008-223269 A 特開２００８−２４０２７６号公報JP 2008-240276 A 特開平７−３３１７１１号公報JP-A-7-331711

本発明は、上述した従来の問題点に鑑みてなされたもので、建物の高層階から低層階への水の逆流を防止して、低層階用の給水装置へ過大な背圧が加わることを防止する増圧給水システムを提供することを目的とする。 The present invention has been made in view of the above-described conventional problems, and prevents back flow of water from a higher floor to a lower floor of a building, so that excessive back pressure is applied to the water supply device for the lower floor. an object of the present invention is to provide an increased pressure feed water system that proof resign.

上述した目的を達成するために、本発明の一態様は、建物に給水する増圧給水システムであって、水道管に連結される低層階用の第１の給水装置と、前記第１の給水装置に直列に連結され、前記第１の給水装置よりも高い位置に配置される高層階用の第２の給水装置とを備え、前記第１の給水装置のポンプの吐出側に逆止弁が設けられ、前記第２の給水装置のポンプの吐出側に逆止弁が設けられ、前記第１の給水装置の吐出側と前記第２の給水装置の吸込側との間に、配水管と、前記配水管に接続された逃し管とが設けられ、前記配水管内の水圧が所定の値まで上昇すると開き、その所定の値よりも低いときに閉じる一次圧力調整弁であって、前記第１の給水装置に加わる背圧を低減させる一次圧力調整弁を前記逃し管に設けたことを特徴とする。 In order to achieve the above-described object, one aspect of the present invention is a pressure-increasing water supply system for supplying water to a building, the first water supply device for a lower floor connected to a water pipe, and the first water supply. A high-floor second water supply device connected in series to the device and disposed at a position higher than the first water supply device, and a check valve is provided on the discharge side of the pump of the first water supply device A check valve is provided on the discharge side of the pump of the second water supply device, and between the discharge side of the first water supply device and the suction side of the second water supply device, A relief pipe connected to the water distribution pipe, which opens when the water pressure in the water distribution pipe rises to a predetermined value, and closes when the water pressure is lower than the predetermined value ; and characterized in that the primary pressure regulating valve to reduce the back pressure applied to the water supply device provided in relief tube the That.

本発明の好ましい態様は、前記第２の給水装置のポンプの吸込側には逆流防止器が設けられていることを特徴とする。 A preferred embodiment of the present invention, the the suction side of the pump of the second water supply device, wherein the backflow preventer is al provided.

本発明によれば、第１の給水装置の背圧が過大となった場合に、一次圧力調整弁から高圧の水を放出することができるので、第１の給水装置に加わる背圧を低減させることができる。さらに、第２の給水装置のポンプの吸込側に配置された逆流防止器により、建物の高層階から低層階への水の逆流が防止され、過大な背圧による第１の給水装置の破損が防止される。また、給水栓の上流側に設けられた逆止弁により、給水栓からの空気の吸い込みを防止することができる。   According to the present invention, when the back pressure of the first water supply device becomes excessive, high pressure water can be discharged from the primary pressure regulating valve, so that the back pressure applied to the first water supply device is reduced. be able to. Furthermore, the backflow preventer arranged on the suction side of the pump of the second water supply device prevents the backflow of water from the upper floor to the lower floor of the building, and damage to the first water supply device due to excessive back pressure. Is prevented. In addition, the check valve provided on the upstream side of the water tap can prevent air from being sucked from the water tap.

本発明の一実施形態に係る増圧給水システムを示す模式図である。It is a schematic diagram which shows the pressure increase water supply system which concerns on one Embodiment of this invention. 第１の給水装置を示す模式図である。It is a schematic diagram which shows a 1st water supply apparatus. 第２の給水装置および逆流防止器を示す模式図である。It is a schematic diagram which shows a 2nd water supply apparatus and a backflow preventer. 逆流防止器を第２の給水装置に組み込んだ例を示す模式図である。It is a schematic diagram which shows the example which incorporated the backflow preventer in the 2nd water supply apparatus. 複数のポンプを有する給水装置の例を示す模式図である。It is a schematic diagram which shows the example of the water supply apparatus which has a some pump. 本発明の他の実施形態に係る増圧給水システムを示す模式図である。It is a schematic diagram which shows the pressure increase water supply system which concerns on other embodiment of this invention. 本発明のさらに他の実施形態に係る増圧給水システムを示す模式図である。It is a schematic diagram which shows the pressure increase water supply system which concerns on other embodiment of this invention.

以下、本発明の実施形態に係る増圧給水システムについて図面を参照して説明する。
図１は、本発明の一実施形態に係る増圧給水システムを示す模式図である。この増圧給水システムは、高層建築物（例えば、１６階以上の建物）に使用される直結式の増圧給水システムである。図１に示すように、この増圧給水システムは、水道管２に連結された第１の給水装置ＢＰ１と、第１の給水装置ＢＰ１に直列に連結された第２の給水装置ＢＰ２とを有している。第１の給水装置ＢＰ１は、グランドレベルまたは地下に設置されており、第２の給水装置ＢＰ２は、建物１の中間層階に設置されている。 Hereinafter, an increased pressure water supply system according to an embodiment of the present invention will be described with reference to the drawings.
Drawing 1 is a mimetic diagram showing the pressure increase water supply system concerning one embodiment of the present invention. This pressure increase water supply system is a direct connection type pressure increase water supply system used for a high-rise building (for example, a building having 16 floors or more). As shown in FIG. 1, this pressure-increasing water supply system has a first water supply device BP1 connected to the water pipe 2, and a second water supply device BP2 connected in series to the first water supply device BP1. doing. The first water supply device BP1 is installed on the ground level or underground, and the second water supply device BP2 is installed on the middle floor of the building 1.

第１の給水装置ＢＰ１の吸込口は、導入管５を介して水道管２に接続されている。第１の給水装置ＢＰ１の吐出口と第２の給水装置ＢＰ２の吸込口とは第１の配水管７によって連結されており、この第１の配水管７は、建物１の低層階の各給水栓９に枝管１２を介して連通している。第２の給水装置ＢＰ２の吐出口には、第２の配水管１５が接続されており、この第２の配水管１５は、建物１の高層階の各給水栓１０に枝管１３を介して連通している。第１の給水装置ＢＰ１は、水道管２からの水を増圧して建物１の低層階の各給水栓９に水を供給し、第２の給水装置ＢＰ２は、第１の給水装置ＢＰ１から移送された水を増圧して建物１の高層階の各給水栓１０に水を供給するようになっている。   A suction port of the first water supply device BP <b> 1 is connected to the water pipe 2 through the introduction pipe 5. The discharge port of the first water supply device BP1 and the suction port of the second water supply device BP2 are connected to each other by a first water distribution pipe 7. The first water distribution pipe 7 is connected to each water supply on the lower floor of the building 1. The stopper 9 communicates with the branch pipe 12. A second water distribution pipe 15 is connected to the discharge port of the second water supply device BP2, and this second water distribution pipe 15 is connected to each water tap 10 on the higher floor of the building 1 via a branch pipe 13. Communicate. The first water supply device BP1 increases the pressure from the water pipe 2 to supply water to each faucet 9 on the lower floor of the building 1, and the second water supply device BP2 is transferred from the first water supply device BP1. The pressure of the generated water is increased to supply water to each of the water taps 10 on the upper floor of the building 1.

図２は、第１の給水装置ＢＰ１を示す模式図である。図２に示すように、第１の給水装置ＢＰ１は、導入管５を介して水道管２に連結されるポンプＰ１と、このポンプＰ１を駆動する駆動源としてのモータＭ１と、モータＭ１の回転速度を増減するインバータＩＮＶ１と、ポンプＰ１の吐出側に配置された逆止弁ＣＶ１と、逆止弁ＣＶ１の吐出側に配置されたフロースイッチＳＷ１、圧力センサＰＳ１、および圧力タンクＰＴ１とを備えている。これら構成要素は、キャビネットＣＢ１内に収容されている。   FIG. 2 is a schematic diagram showing the first water supply device BP1. As shown in FIG. 2, the first water supply device BP1 includes a pump P1 connected to the water pipe 2 via the introduction pipe 5, a motor M1 as a drive source for driving the pump P1, and rotation of the motor M1. Inverter INV1 that increases or decreases speed, check valve CV1 disposed on the discharge side of pump P1, flow switch SW1, pressure sensor PS1, and pressure tank PT1 disposed on the discharge side of check valve CV1 are provided. Yes. These components are accommodated in the cabinet CB1.

逆止弁ＣＶ１は、ポンプＰ１の吐出口に接続された吐出管Ｌ１に設けられており、ポンプＰ１が停止したときの水の逆流を防止するための弁である。フロースイッチＳＷ１は吐出管Ｌ１を流れる水の流量が所定の値にまで低下したことを検知する流量検知器である。圧力センサＰＳ１は、吐出側圧力（すなわち、第１の給水装置ＢＰ１に加わる背圧）を測定するための水圧測定器である。圧力タンクＰＴ１は、ポンプＰ１が停止している間の吐出側圧力を保持するための圧力保持器である。吐出管Ｌ１は第１の配水管７に接続されている。   The check valve CV1 is provided in a discharge pipe L1 connected to the discharge port of the pump P1, and is a valve for preventing a back flow of water when the pump P1 is stopped. The flow switch SW1 is a flow rate detector that detects that the flow rate of water flowing through the discharge pipe L1 has decreased to a predetermined value. The pressure sensor PS1 is a water pressure measuring device for measuring the discharge side pressure (that is, the back pressure applied to the first water supply device BP1). The pressure tank PT1 is a pressure holder for holding the discharge side pressure while the pump P1 is stopped. The discharge pipe L <b> 1 is connected to the first water distribution pipe 7.

ポンプＰ１の吸込口には減圧式逆流防止器２０が接続されている。この減圧式逆流防止器２０は、水道管２への水の逆流を確実に防止するために設置することが義務付けられているものである。一方、水道管２に直結されない高層階用の第２の給水装置ＢＰ２には、減圧式逆流防止器を設置することは義務付けられていない。なお、減圧式逆流防止器とは、逃し弁が配置された中間室を２つの逆止弁が挟むように配置された構成を有する逆流防止器である。   A decompression backflow preventer 20 is connected to the suction port of the pump P1. The decompression type backflow preventer 20 is obliged to be installed in order to reliably prevent the backflow of water into the water pipe 2. On the other hand, it is not obliged to install a depressurization type backflow preventer in the second water supply device BP2 for a higher floor that is not directly connected to the water pipe 2. The decompression type backflow preventer is a backflow preventer having a configuration in which two check valves are sandwiched between intermediate chambers in which relief valves are arranged.

第１の給水装置ＢＰ１は、給水動作を制御する制御盤（コントローラ）ＣＮ１をさらに備えており、インバータＩＮＶ１、フロースイッチＳＷ１、圧力センサＰＳ１は、制御盤ＣＮ１に信号線を介して接続されている。フロースイッチＳＷ１により水の流量が所定の値にまで低下したことが検知されると、制御盤ＣＮ１はポンプＰ１の運転速度を一時的に上げるようインバータＩＮＶ１に指令を出し、圧力タンクＰＴ１に蓄圧してからポンプＰ１の運転を停止させるようになっている。一方、吐出側圧力（吐出管Ｌ１内の水圧）が所定の値まで低下すると、制御盤ＣＮ１はポンプＰ１の運転を開始するようインバータＩＮＶ１に指令を出す。   The first water supply device BP1 further includes a control panel (controller) CN1 that controls the water supply operation, and the inverter INV1, the flow switch SW1, and the pressure sensor PS1 are connected to the control panel CN1 via signal lines. . When the flow switch SW1 detects that the flow rate of water has decreased to a predetermined value, the control panel CN1 issues a command to the inverter INV1 to temporarily increase the operating speed of the pump P1, and accumulates pressure in the pressure tank PT1. After that, the operation of the pump P1 is stopped. On the other hand, when the discharge side pressure (water pressure in the discharge pipe L1) decreases to a predetermined value, the control panel CN1 issues a command to the inverter INV1 to start the operation of the pump P1.

この第１の給水装置ＢＰ１においては、フロースイッチＳＷ１や圧力センサＰＳ１の出力信号に基づいて、ポンプＰ１の運転速度（回転速度）がインバータＩＮＶ１によって可変速制御される。一般的には、圧力センサＰＳ１により測定された圧力信号が設定された目標圧力と一致するようにポンプＰ１の運転速度を制御してポンプＰ１の吐出圧力が一定になるように制御する吐出圧力一定制御や、ポンプＰ１の吐出圧力の目標値を適切に変化させることにより末端の給水栓における供給水圧を一定に制御する推定末端圧力一定制御などが行われる。これらの制御によれば、その時々の需要水量に見合った回転速度でポンプＰ１が駆動されるので、省エネルギーを達成することができる。   In the first water supply device BP1, the operation speed (rotational speed) of the pump P1 is variable-speed controlled by the inverter INV1 based on the output signals of the flow switch SW1 and the pressure sensor PS1. Generally, the discharge pressure is constant so that the operation speed of the pump P1 is controlled so that the pressure signal measured by the pressure sensor PS1 matches the set target pressure so that the discharge pressure of the pump P1 becomes constant. Control or estimated terminal pressure constant control for controlling the supply water pressure at the terminal water tap to be constant by appropriately changing the target value of the discharge pressure of the pump P1 is performed. According to these controls, the pump P1 is driven at a rotational speed commensurate with the amount of water demand at that time, so energy saving can be achieved.

図３は、第２の給水装置ＢＰ２および逆流防止器を示す模式図である。第２の給水装置ＢＰ２の基本的な構成および動作は、上述した第１の給水装置ＢＰ１と同様であり、同一の構成要素には対応する符号が付されている。この第２の給水装置ＢＰ２は、減圧式逆流防止器を備えていない点で第１の給水装置ＢＰ１と相違する。これは、上述したように、水道管２に直結されていない第２の給水装置ＢＰ２には、逆流防止器を設けることは義務付けられていないからである。しかしながら、本実施形態では、建物１の高層階から低層階への水の逆流を確実に防ぐために、第２の給水装置ＢＰ２の直ぐ上流側に逆流防止器３０が設けられている。より具体的には、逆流防止器３０は、第１の配水管７に設置され、第２の給水装置ＢＰ２の吸込口に近接して配置されている。   FIG. 3 is a schematic diagram showing the second water supply device BP2 and the backflow preventer. The basic configuration and operation of the second water supply device BP2 are the same as those of the above-described first water supply device BP1, and the same reference numerals are given to the same components. This 2nd water supply apparatus BP2 differs from 1st water supply apparatus BP1 by the point which is not equipped with the pressure reduction type | mold backflow preventer. This is because, as described above, the second water supply device BP2 that is not directly connected to the water pipe 2 is not obligated to provide a backflow preventer. However, in the present embodiment, the backflow preventer 30 is provided immediately upstream of the second water supply device BP2 in order to reliably prevent the backflow of water from the higher floor to the lower floor of the building 1. More specifically, the backflow preventer 30 is installed in the 1st water distribution pipe 7, and is arrange | positioned close to the suction inlet of 2nd water supply apparatus BP2.

第２の給水装置ＢＰ２の逆流防止器３０としては、単式逆流防止器または複式逆流防止器を用いることが好ましい。単式逆流防止器とは１つの逆止弁を備えた逆流防止器であり、複式逆流防止器とは直列に配列される２つの逆止弁を備えた逆流防止器である。単式逆流防止器および複式逆流防止器は、減圧式逆流防止器とは異なり、逃し弁を持たず、逆流防止器からの排水を伴わない。したがって、建物１内に排水用のパイプを設置する必要がなく、設置コストを下げることができる。なお、設備面で問題がなければ減圧式逆流防止器を採用してもよい。   As the backflow preventer 30 of the second water supply device BP2, it is preferable to use a single backflow preventer or a double backflow preventer. The single-type backflow preventer is a backflow preventer having one check valve, and the double-type backflow preventer is a backflow preventer having two check valves arranged in series. The single-type backflow preventer and the double-type backflow preventer do not have a relief valve and are not accompanied by drainage from the backflow preventer, unlike the reduced pressure type backflow preventer. Therefore, it is not necessary to install a drain pipe in the building 1, and the installation cost can be reduced. If there is no problem in terms of equipment, a reduced pressure backflow preventer may be employed.

第１の給水装置ＢＰ１と同様に、第２の給水装置ＢＰ２のポンプＰ２の吐出側にも、逆止弁ＣＶ２が設けられている。したがって、ポンプＰ２の運転が停止している間、建物１の高層階の水が低層階に逆流することはない。仮に、この逆止弁ＣＶ２が故障した場合でも、ポンプＰ２の吸込側に逆流防止器３０が設けられているので、建物１の高層階の水が低層階に逆流することが確実に防止される。したがって、第１の給水装置ＢＰ１に加わる背圧の過度な上昇を防ぐことができる。   As with the first water supply device BP1, a check valve CV2 is also provided on the discharge side of the pump P2 of the second water supply device BP2. Therefore, while the operation of the pump P2 is stopped, the water on the upper floor of the building 1 does not flow back to the lower floor. Even if the check valve CV2 breaks down, the backflow preventer 30 is provided on the suction side of the pump P2, so that the water on the upper floor of the building 1 is reliably prevented from flowing back to the lower floor. . Therefore, an excessive increase in the back pressure applied to the first water supply device BP1 can be prevented.

図３に示す第２の給水装置ＢＰ２では、逆流防止器３０が第２の給水装置ＢＰ２の外に配置されているが、図４に示すように、逆流防止器３０を第２の給水装置ＢＰ２のキャビネットＣＢ２内に配置し、第２の給水装置ＢＰ２に組み込んでもよい。この場合も、逆流防止器３０はポンプＰ２の吸込口に近接して配置される。このような構成によれば、逆流防止器３０を第１の配水管７に設置する作業が不要となるので、設置コストを低くできる。   In the second water supply device BP2 shown in FIG. 3, the backflow preventer 30 is arranged outside the second water supply device BP2. However, as shown in FIG. 4, the backflow preventer 30 is connected to the second water supply device BP2. It may be arranged in the cabinet CB2 and incorporated in the second water supply device BP2. Also in this case, the backflow preventer 30 is disposed close to the suction port of the pump P2. According to such a configuration, it is not necessary to install the backflow preventer 30 in the first water distribution pipe 7, so that the installation cost can be reduced.

なお、図２に示す第１の給水装置ＢＰ１および図３に示す第２の給水装置ＢＰ２は、いずれも１台のポンプのみを有しているが、図５に示すように複数のポンプを有してもよい。図５は、複数のポンプを備えた第１の給水装置ＢＰ１を示す模式図である。図示しないが、第２の給水装置ＢＰ２も、同様の配置に従って複数のポンプを備えることができる。複数のポンプを備えることにより、追加解列を伴う複数台運転を行ったり、運転中にあるポンプやインバータの異常が検知された場合に、他の正常なポンプやインバータに運転を切り替えて給水を継続することができる。   Note that each of the first water supply device BP1 shown in FIG. 2 and the second water supply device BP2 shown in FIG. 3 has only one pump, but has a plurality of pumps as shown in FIG. May be. FIG. 5 is a schematic diagram illustrating a first water supply device BP1 including a plurality of pumps. Although not shown in figure, 2nd water supply apparatus BP2 can also be equipped with a some pump according to the same arrangement | positioning. By providing multiple pumps, when multiple units are operated with additional disconnection, or when an abnormality is detected in the pump or inverter during operation, the operation is switched to another normal pump or inverter to supply water. Can continue.

次に、本発明の他の実施形態について図６を参照して説明する。図６は、本発明の他の実施形態に係る増圧給水システムを示す模式図である。図６に示すように、第１の給水装置ＢＰ１の吐出側には一次圧力調整弁３５が設けられている。より詳しくは、第１の配水管７には逃し管３４が接続されており、この逃し管３４に一次圧力調整弁３５が設けられている。一次圧力調整弁３５は、一次圧力（第１の配水管７内の水圧）が所定の値にまで上昇すると開き、その所定の値よりも低いときには閉じるように構成されている。一次圧力調整弁３５は、第１の給水装置ＢＰ１と第２の給水装置ＢＰ２との間に位置しており、より具体的には、一次圧力調整弁３５は、第１の給水装置ＢＰ１と建物１との間に位置し、第１の給水装置ＢＰ１のすぐ下流側に配置されている。   Next, another embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic diagram showing a pressure-increasing water supply system according to another embodiment of the present invention. As shown in FIG. 6, a primary pressure regulating valve 35 is provided on the discharge side of the first water supply device BP1. More specifically, a relief pipe 34 is connected to the first water distribution pipe 7, and a primary pressure adjusting valve 35 is provided in the relief pipe 34. The primary pressure regulating valve 35 is configured to open when the primary pressure (water pressure in the first water distribution pipe 7) rises to a predetermined value, and close when the primary pressure is lower than the predetermined value. The primary pressure adjustment valve 35 is located between the first water supply device BP1 and the second water supply device BP2, and more specifically, the primary pressure adjustment valve 35 is connected to the first water supply device BP1 and the building. 1 and located immediately downstream of the first water supply device BP1.

本実施形態においても、逆止弁ＣＶ２に加えて、建物１の高層階から低層階への水の逆流を防ぐための逆流防止器３０が設けられているので、第１の給水装置ＢＰ１に過大な背圧が加わることはない。しかしながら、異物の噛み込みなどに起因して逆止弁ＣＶ２や逆流防止器３０が故障することも考えられる。このような場合でも、一次圧力調整弁３５が作動し、第１の給水装置ＢＰ１の背圧を逃がすことができる。なお、本実施形態においては、逆流防止器３０を省略することもできる。   Also in the present embodiment, in addition to the check valve CV2, the backflow preventer 30 for preventing the backflow of water from the higher floor to the lower floor of the building 1 is provided, so the first water supply device BP1 is excessive. No back pressure is applied. However, it is also conceivable that the check valve CV2 or the backflow preventer 30 may be broken due to foreign matter biting. Even in such a case, the primary pressure regulating valve 35 operates and the back pressure of the first water supply device BP1 can be released. In the present embodiment, the backflow preventer 30 can be omitted.

次に、本発明のさらに他の実施形態について図７を参照して説明する。図７は、本発明の他の実施形態に係る増圧給水システムを示す模式図である。図７に示すように、建物１の低層階に配置される第１の配水管７と各給水栓９とを接続する枝管１２には、逆止弁３８がそれぞれ設けられている。その他の構成は、上述した実施形態に係る増圧給水システムの構成と同一である。   Next, still another embodiment of the present invention will be described with reference to FIG. FIG. 7 is a schematic diagram showing a pressure-increasing water supply system according to another embodiment of the present invention. As shown in FIG. 7, check valves 38 are respectively provided on the branch pipes 12 connecting the first water distribution pipes 7 and the water taps 9 arranged on the lower floors of the building 1. Other configurations are the same as the configuration of the pressure increasing water supply system according to the above-described embodiment.

第１の給水装置ＢＰ１が停止している状態で、第２の給水装置ＢＰ２が運転されると、低層階の第１の配水管７内の圧力が低下し、第１の配水管７内に負圧が形成されることがある。このような場合でも、各枝管１２に逆止弁３８が設けられているので、低層階の各給水栓９から空気が第１の配水管７内に吸い込まれることを防止することができる。   When the second water supply device BP2 is operated in a state where the first water supply device BP1 is stopped, the pressure in the first water distribution pipe 7 on the lower floor is reduced, Negative pressure may be formed. Even in such a case, since the check valve 38 is provided in each branch pipe 12, it is possible to prevent air from being sucked into the first water distribution pipe 7 from each water tap 9 on the lower floor.

上述した実施形態は、本発明が属する技術分野における通常の知識を有する者が本発明を実施できることを目的として記載されたものである。上記実施形態の種々の変形例は、当業者であれば当然になしうることであり、本発明の技術的思想は他の実施形態にも適用しうることである。したがって、本発明は、記載された実施形態に限定されることはなく、特許請求の範囲によって定義される技術的思想に従った最も広い範囲とすべきである。   The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention should not be limited to the described embodiments, but should be the widest scope according to the technical idea defined by the claims.

１ 建物
２ 水道管
５ 導入管
７ 第１の配水管
９，１０ 給水栓
１２，１３ 枝管
１５ 第２の配水管
２０ 減圧式逆流防止器
３０ 逆流防止器
３４ 逃し管
３５ 一次圧力調整弁
３８ 逆止弁
ＢＰ１，ＢＰ２ 給水装置
Ｍ１，Ｍ２ モータ
ＩＮＶ１，ＩＮＶ２ インバータ
ＣＶ１，ＣＶ２ 逆止弁
ＳＷ１，ＳＷ２ フロースイッチ
ＰＳ１，ＰＳ２ 圧力センサ
ＰＴ１，ＰＴ２ 圧力タンク
ＣＮ１，ＣＮ２ 制御盤
ＣＢ１，ＣＢ２ キャビネット
Ｌ１，Ｌ２ 吐出管 DESCRIPTION OF SYMBOLS 1 Building 2 Water pipe 5 Introducing pipe 7 1st water distribution pipes 9 and 10 Water supply taps 12 and 13 Branch pipe 15 2nd water distribution pipe 20 Depressurization type backflow preventer 30 Backflow preventer 34 Relief pipe 35 Primary pressure regulating valve 38 Reverse Stop valve BP1, BP2 Water supply device M1, M2 Motor INV1, INV2 Inverter CV1, CV2 Check valve SW1, SW2 Flow switch PS1, PS2 Pressure sensor PT1, PT2 Pressure tank CN1, CN2 Control panel CB1, CB2 Cabinet L1, L2 Discharge pipe

Claims (2)

建物に給水する増圧給水システムであって、
水道管に連結される低層階用の第１の給水装置と、
前記第１の給水装置に直列に連結され、前記第１の給水装置よりも高い位置に配置される高層階用の第２の給水装置とを備え、
前記第１の給水装置のポンプの吐出側に逆止弁が設けられ、
前記第２の給水装置のポンプの吐出側に逆止弁が設けられ、
前記第１の給水装置の吐出側と前記第２の給水装置の吸込側との間に、配水管と、前記配水管に接続された逃し管とが設けられ、
前記配水管内の水圧が所定の値まで上昇すると開き、その所定の値よりも低いときに閉じる一次圧力調整弁であって、前記第１の給水装置に加わる背圧を低減させる一次圧力調整弁を前記逃し管に設けたことを特徴とする増圧給水システム。 A pressurized water supply system for supplying water to a building,
A first water supply device for a lower floor connected to a water pipe;
A second water supply device for a high floor connected to the first water supply device in series and disposed at a position higher than the first water supply device;
A check valve is provided on the discharge side of the pump of the first water supply device;
A check valve is provided on the discharge side of the pump of the second water supply device;
Between the discharge side of the first water supply device and the suction side of the second water supply device, a water distribution pipe and a relief pipe connected to the water distribution pipe are provided,
A primary pressure regulating valve that opens when the water pressure in the water distribution pipe rises to a predetermined value and closes when the water pressure is lower than the predetermined value, and reduces the back pressure applied to the first water supply device. A pressure-increasing water supply system provided in the escape pipe . 前記第２の給水装置のポンプの吸込側には逆流防止器が設けられることを特徴とする請求項１に記載の増圧給水システム。 Pressure feed water system increased according to claim 1 to the suction side of the pump of the second water supply device, wherein the backflow preventer is al provided.
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