JP6977106B2

JP6977106B2 - Water supply device

Info

Publication number: JP6977106B2
Application number: JP2020088905A
Authority: JP
Inventors: 哲則坂谷; 章太渡邉
Original assignee: 株式会社川本製作所
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2021-12-08
Anticipated expiration: 2040-05-21
Also published as: JP2021183816A

Description

本発明は、流量センサ及び逆止弁を備える給水装置に関する。 The present invention relates to a water supply device including a flow rate sensor and a check valve.

従来、推定末端圧力一定制御により給水を行う給水装置では、ポンプを駆動するモータへ供給する電圧の出力周波数を変数とする関数により、目標圧力を演算する技術が知られている（例えば、特許文献１参照。）。 Conventionally, in a water supply device that supplies water by controlling a constant estimated terminal pressure, a technique of calculating a target pressure by a function having an output frequency of a voltage supplied to a motor for driving a pump as a variable is known (for example, Patent Documents). See 1.).

また、ポンプの二次側の流量を検出し、流量を変数とする関数により目標圧力を演算する技術も知られている。流量を検出する手段として、羽根車式の流量センサを用いる技術が知られている。この流量センサは、流路に、磁石が装着された羽根車を設け、多極着磁された磁石の磁束を磁気検出部であるホールＩＣで検出する構成を有する。羽根車が水の流れにより回転すると、ホールＩＣが単位時間あたりのパルス信号をカウントする。このように、流量センサは、羽根車を通過する流量に比例したパルス信号を取り出すことで、流量を検出することが可能となる。 Further, a technique of detecting the flow rate on the secondary side of the pump and calculating the target pressure by a function having the flow rate as a variable is also known. As a means for detecting the flow rate, a technique using an impeller type flow rate sensor is known. This flow sensor has an impeller equipped with a magnet in the flow path, and has a configuration in which the magnetic flux of the multi-pole magnetized magnet is detected by a Hall IC which is a magnetic detection unit. When the impeller rotates due to the flow of water, the Hall IC counts the pulse signal per unit time. In this way, the flow rate sensor can detect the flow rate by extracting a pulse signal proportional to the flow rate passing through the impeller.

特開平１１−８２３６１号公報Japanese Unexamined Patent Publication No. 11-82361

上述の、ポンプの二次側に設けられる羽根車式の流量センサには以下の問題があった。すなわち、ポンプの二次側では、ポンプが発生する乱流に起因して、流路内に偏流が生じる。そして、この偏流の流路内の位置は、流量に応じて移動する。 The impeller type flow rate sensor provided on the secondary side of the pump described above has the following problems. That is, on the secondary side of the pump, a drift is generated in the flow path due to the turbulent flow generated by the pump. Then, the position in the flow path of this drift moves according to the flow rate.

このように流路中の偏流の位置が流量によって移動することで、羽根車を通過する水の流量と回転数との直線性が低下する虞がある。結果、流量センサの検出精度が低下する虞がある。ここで、直線性とは、比例関係にあることである。 Since the position of the drift in the flow path moves depending on the flow rate in this way, there is a possibility that the linearity between the flow rate of the water passing through the impeller and the rotation speed may decrease. As a result, the detection accuracy of the flow rate sensor may decrease. Here, linearity means that there is a proportional relationship.

この為、本発明は、流量センサの検出精度の低下を抑制できる給水装置を提供することを目的とする。 Therefore, an object of the present invention is to provide a water supply device capable of suppressing a decrease in the detection accuracy of the flow rate sensor.

本発明の一態様に係る給水装置は、水を増圧して二次側に吐出するポンプと、前記ポンプの二次側に設けられて、二次側への流れを許容し、一次側への流れを規制する逆止弁と、前記逆止弁の吐出口に連結される連結管と、前記連結管に設けられて、流量を検出する流量センサと、を備え、前記流量センサは、水の流れにより回転する羽根車と、前記羽根車の回転を検出し、前記羽根車の回転に応じた信号を出力する検出部と、を備える。前記逆止弁は、弁箱、並びに、前記弁箱内に収納され、前記弁箱の弁座に当接する閉位置及び前記弁座から離れる開位置の間で移動可能な弁体を備える。前記弁体は、弁体本体、及び前記弁体本体を前記閉位置に付勢するばねを備える。前記弁体本体は、基部、前記弁座に当接するゴム部、押え板、及びボルトを備える。前記基部は、円板状に形成される。前記ゴム部は、外径が前記基部の外径より小径の環状に形成される。前記押え板は、外径が前記ゴム部の内径より大径であって前記ゴム部の外径より小径な円板状に形成される。前記押え板、前記ゴム部、前記基部が順次前記弁座側から並んで配され、前記押え板が、前記押え板及び前記基部の間に前記ゴム部を挟持させた状態で前記ボルトにより前記基部に固定され、前記ボルトが前記基部と同軸に配置されてヘッドが前記押え板側に配置される。前記基部、前記ゴム部、前記押え板、及び前記ボルトにより構成される前記弁体本体の前記弁座側の端面は、径方向で内方より外方が前記基部に対して低い面に構成される。 The water supply device according to one aspect of the present invention is provided with a pump that boosts water and discharges it to the secondary side, and is provided on the secondary side of the pump to allow flow to the secondary side and to the primary side. A check valve that regulates the flow, a connecting pipe connected to the discharge port of the check valve, and a flow rate sensor provided in the connecting pipe to detect the flow rate are provided, and the flow rate sensor is provided with water. It includes an impeller that rotates due to a flow, and a detection unit that detects the rotation of the impeller and outputs a signal corresponding to the rotation of the impeller. The check valve includes a valve box and a valve body that is housed in the valve box and can move between a closed position that abuts on the valve seat of the valve box and an open position that separates from the valve seat. The valve body includes a valve body body and a spring that urges the valve body body to the closed position. The valve body body includes a base portion, a rubber portion that abuts on the valve seat, a holding plate, and a bolt. The base is formed in a disk shape. The rubber portion is formed in an annular shape having an outer diameter smaller than the outer diameter of the base portion. The presser plate is formed in a disk shape having an outer diameter larger than the inner diameter of the rubber portion and a smaller diameter than the outer diameter of the rubber portion. The presser plate, the rubber portion, and the base portion are sequentially arranged side by side from the valve seat side, and the presser plate has the rubber portion sandwiched between the presser plate and the base portion, and the base portion is provided by the bolt. The bolt is arranged coaxially with the base portion, and the head is arranged on the holding plate side. The end face on the valve seat side of the valve body body composed of the base portion, the rubber portion, the holding plate, and the bolt is configured such that the outer side is lower than the inner side in the radial direction with respect to the base part. Ru.

本発明は、流量センサの検出精度の低減を抑制できる給水装置を提供することを目的とする。 An object of the present invention is to provide a water supply device capable of suppressing a decrease in detection accuracy of a flow rate sensor.

本発明の一実施形態に係る給水装置の構成を示す正面図。The front view which shows the structure of the water supply device which concerns on one Embodiment of this invention. 同給水装置のポンプの二次側の構成を示す断面図。Sectional drawing which shows the structure of the secondary side of the pump of the water supply device. 同給水装置の同ポンプの二次側の構成を示す断面図。Sectional drawing which shows the structure of the secondary side of the pump of the water supply device. 同給水装置に用いられる逆止弁の構造を示す断面図。The cross-sectional view which shows the structure of the check valve used in the water supply device. 同逆止弁の二次側の端面の構造を示す説明図。Explanatory drawing which shows the structure of the end face of the secondary side of the check valve. 同給水装置に用いられる流量センサの構成示す断面図。The cross-sectional view which shows the structure of the flow rate sensor used in the water supply device. 同給水装置の変形例に係る連結管及びその周囲の構成を示す断面図。A cross-sectional view showing a configuration of a connecting pipe and its surroundings according to a modified example of the water supply device.

本発明の一実施形態に係る給水装置１０を、図１乃至図６を用いて説明する。図１は、給水装置１０の構成を示す正面図である。図２は、給水装置１０に用いられるポンプ装置３０の二次側の構成を示す断面図である。図３は、ポンプ装置３０の二次側の構成を示す断面図である。図４は、給水装置１０に用いられる逆止弁４０の構成を示す断面図である。図５は、逆止弁４０の二次側の端面を示す平面図である。図６は、給水装置１０に用いられる流量センサ６０の構成を示す断面図である。 The water supply device 10 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a front view showing the configuration of the water supply device 10. FIG. 2 is a cross-sectional view showing the configuration of the secondary side of the pump device 30 used in the water supply device 10. FIG. 3 is a cross-sectional view showing the configuration of the secondary side of the pump device 30. FIG. 4 is a cross-sectional view showing the configuration of the check valve 40 used in the water supply device 10. FIG. 5 is a plan view showing the end face of the check valve 40 on the secondary side. FIG. 6 is a cross-sectional view showing the configuration of the flow rate sensor 60 used in the water supply device 10.

図１乃至図３に示すように、給水装置１０は、ベース２０と、ベース２０上に固定された複数のポンプ装置３０と、複数のポンプ装置３０のそれぞれの二次側に設けられる逆止弁４０と、逆止弁４０の二次側に設けられる連結管５０と、連結管５０に設けられる流量センサ６０と、連結管５０の二次側に設けられる開閉弁７０と、複数の連結管５０が合流する合流管８０と、合流管８０に設けられる蓄圧装置９０と、合流管８０に設けられる圧力センサ１００と、各ポンプ装置３０の動作を制御する制御盤１１０と、を備える。 As shown in FIGS. 1 to 3, the water supply device 10 includes a base 20, a plurality of pump devices 30 fixed on the base 20, and a check valve provided on each secondary side of the plurality of pump devices 30. 40, a connecting pipe 50 provided on the secondary side of the check valve 40, a flow sensor 60 provided on the connecting pipe 50, an on-off valve 70 provided on the secondary side of the connecting pipe 50, and a plurality of connecting pipes 50. The merging pipe 80 is provided with a merging pipe 80, a pressure accumulator 90 provided in the merging pipe 80, a pressure sensor 100 provided in the merging pipe 80, and a control panel 110 for controlling the operation of each pump device 30.

ポンプ装置３０は、ポンプ３１と、ポンプを駆動するモータと、を備える。ポンプ装置３０は、例えば３台設けられる。ポンプ３１は、水を増圧して吐出する。 The pump device 30 includes a pump 31 and a motor for driving the pump. For example, three pump devices 30 are provided. The pump 31 boosts and discharges water.

逆止弁４０は、図２乃至図５に示すように、弁箱４１と、弁箱４１内に設けられる弁体案内４２と、弁箱４１内に収納される弁体４３と、を備える。 As shown in FIGS. 2 to 5, the check valve 40 includes a valve box 41, a valve body guide 42 provided in the valve box 41, and a valve body 43 housed in the valve box 41.

弁箱４１は、ポンプ３１の二次側に固定される。弁箱４１は、ポンプ３１の吐出口と流体的に接続される。弁箱４１は、ポンプ３１から吐出された水が流れる流路の一部を構成する。 The valve box 41 is fixed to the secondary side of the pump 31. The valve box 41 is fluidly connected to the discharge port of the pump 31. The valve box 41 constitutes a part of the flow path through which the water discharged from the pump 31 flows.

弁箱４１には、流入口４４と、流出口４５と、リブ４６と、が形成される。
流入口４４は、弁箱４１の内部空間に連通する。流入口４４は、ポンプ３１の吐出口に流体的に接続される。流入口４４は、例えば円形に形成される。 The valve box 41 is formed with an inflow port 44, an outflow port 45, and a rib 46.
The inflow port 44 communicates with the internal space of the valve box 41. The inflow port 44 is fluidly connected to the discharge port of the pump 31. The inflow port 44 is formed, for example, in a circular shape.

流入口４４の弁箱４１の内部空間の縁に、第１の円筒部４７が形成される。第１の円筒部４７の弁箱４１の内部空間に位置する端部４７ａの内径は、所定の一定の内径に設定される。ここで、弁箱４１の内部空間に位置する端部４７ａは、一端及びその近傍の領域を含む。第１の円筒部４７は、弁箱４１の内部空間に位置する端部４７ａまでの範囲が、当該端部４７ａに向かって内径が縮径する形状に構成される。第１の円筒部４７の端面は、弁座４７ｂを構成する。 A first cylindrical portion 47 is formed at the edge of the internal space of the valve box 41 of the inflow port 44. The inner diameter of the end portion 47a located in the internal space of the valve box 41 of the first cylindrical portion 47 is set to a predetermined constant inner diameter. Here, the end portion 47a located in the internal space of the valve box 41 includes one end and a region in the vicinity thereof. The first cylindrical portion 47 is configured such that the range up to the end portion 47a located in the internal space of the valve box 41 has an inner diameter reduced toward the end portion 47a. The end face of the first cylindrical portion 47 constitutes the valve seat 47b.

流出口４５は、弁箱４１の内部空間に連通する。流出口４５は、例えば円形に形成される。流出口４５は、例えば、流入口４４と同軸に形成される。流出口４５は、弁体４３を弁箱４１に設置する際及び弁体４３を弁箱４１から取り出す際に、弁体４３を挿通可能な大きさに形成される。また、流出口４５は、流入口４４より大径に形成される。 The outlet 45 communicates with the internal space of the valve box 41. The outlet 45 is formed, for example, in a circular shape. The outlet 45 is formed coaxially with the inlet 44, for example. The outlet 45 is formed in a size that allows the valve body 43 to be inserted when the valve body 43 is installed in the valve box 41 and when the valve body 43 is taken out from the valve box 41. Further, the outlet 45 is formed to have a larger diameter than the inlet 44.

リブ４６は、弁箱４１内に弁体案内４２を固定する固定部の一例である。リブ４６は、例えば、弁箱４１の内周面４１ａ、及び弁箱４１の内部空間の流入口４４側の端面４１ｂと一体に形成される。リブ４６は、内周面４１ａから流入口４４の軸線側に突出する、例えば板形状に構成される。 The rib 46 is an example of a fixing portion for fixing the valve body guide 42 in the valve box 41. The rib 46 is formed integrally with, for example, the inner peripheral surface 41a of the valve box 41 and the end surface 41b on the inflow port 44 side of the internal space of the valve box 41. The rib 46 is configured in a plate shape, for example, protruding from the inner peripheral surface 41a toward the axis of the inflow port 44.

リブ４６は、例えば複数形成される。複数のリブ４６は、例えば流入口４４の軸線回りに等間隔に形成される。複数のリブ４６は、例えば４つである。複数のリブ４６の流出口４５側の端面４６ａは、弁箱４１の二次側の端面４１ｃに対して、端面４６ａ及び端面４１ｃの間に弁体案内４２の後述する腕部４９を配置可能な程度、流入口４４側にずれた位置に形成される。端面４６ａには、固定部材の一例であるボルト５が螺合するねじ穴４６ｂが形成される。 A plurality of ribs 46 are formed, for example. The plurality of ribs 46 are formed at equal intervals, for example, around the axis of the inflow port 44. The plurality of ribs 46 is, for example, four. The end surface 46a on the outlet 45 side of the plurality of ribs 46 can arrange the arm portion 49 described later of the valve body guide 42 between the end surface 46a and the end surface 41c with respect to the end surface 41c on the secondary side of the valve box 41. It is formed at a position shifted to the inflow port 44 side. A screw hole 46b into which a bolt 5 which is an example of a fixing member is screwed is formed in the end surface 46a.

弁体案内４２は、弁箱４１内に設けられて、弁体４３の開位置Ｐ１及び閉位置Ｐ２間の移動を案内可能に構成される。図３は、弁体４３が開位置Ｐ１にある状態を示して売る。図２は、弁体４３が閉位置Ｐ２にある状態を示している。弁体案内４２は、具体的には、複数のリブ４６に固定される。 The valve body guide 42 is provided in the valve box 41 so as to be able to guide the movement of the valve body 43 between the open position P1 and the closed position P2. FIG. 3 shows a state in which the valve body 43 is in the open position P1 and is sold. FIG. 2 shows a state in which the valve body 43 is in the closed position P2. Specifically, the valve body guide 42 is fixed to a plurality of ribs 46.

弁体案内４２は、例えば、第２の円筒部４８と、第２の円筒部４８の外周面に形成される腕部４９と、を備える。第２の円筒部４８は、弁体４３の後述する弁棒４３ｂを移動可能に収容する内径を有する。第２の円筒部４８の内径は、例えば、弁棒４３ｂの外径より、弁棒４３ｂを移動可能とする程度の大きい径に設定される。 The valve body guide 42 includes, for example, a second cylindrical portion 48 and an arm portion 49 formed on the outer peripheral surface of the second cylindrical portion 48. The second cylindrical portion 48 has an inner diameter that movably accommodates the valve rod 43b, which will be described later, of the valve body 43. The inner diameter of the second cylindrical portion 48 is set to, for example, a diameter larger than the outer diameter of the valve rod 43b so as to allow the valve rod 43b to move.

腕部４９は、例えば、複数のリブ４６と同数形成される。複数の腕部４９のそれぞれは、第２の円筒部４８の外周面から径方向外側に向かって突出する形状に構成される。複数の腕部４９は、例えば、第２の円筒部４８の外周面の軸方向で中途部に形成される。複数の腕部４９の先端部には、ボルト５が挿通する孔４９ａが形成される。腕部４９の長さは、腕部４９の先端部をリブ４６の端面４６ａに配置してボルト５により固定すると、第２の円筒部４８が流入口４４と同軸となる長さを有している。 The arm portions 49 are formed in the same number as, for example, a plurality of ribs 46. Each of the plurality of arm portions 49 is configured to protrude outward in the radial direction from the outer peripheral surface of the second cylindrical portion 48. The plurality of arm portions 49 are formed in the middle portion in the axial direction of the outer peripheral surface of the second cylindrical portion 48, for example. Holes 49a through which bolts 5 are inserted are formed at the tips of the plurality of arm portions 49. The length of the arm portion 49 has a length in which the second cylindrical portion 48 is coaxial with the inflow port 44 when the tip end portion of the arm portion 49 is arranged on the end surface 46a of the rib 46 and fixed by the bolt 5. There is.

このように構成される弁体案内４２は、複数の腕部４９の先端部を複数のリブ４６の端面４６ａに配置してボルト５によってリブ４６に固定される。 In the valve body guide 42 configured as described above, the tip portions of the plurality of arm portions 49 are arranged on the end faces 46a of the plurality of ribs 46 and fixed to the ribs 46 by bolts 5.

弁体４３は、弁体本体４３ａと、弁体本体４３ａに設けられる弁棒４３ｂと、ばね４３ｃと、を備える。弁体本体４３ａは、弁座４７ｂに当接して第２の円筒部４８の開口を閉塞可能な大きさを有する。弁体本体４３ａは、例えば、円板状に構成される。弁体本体４３ａの、弁座４７ｂに対向する部分は、例えばゴムにより形成される。 The valve body 43 includes a valve body body 43a, a valve rod 43b provided on the valve body body 43a, and a spring 43c. The valve body 43a has a size capable of contacting the valve seat 47b and closing the opening of the second cylindrical portion 48. The valve body 43a is formed in a disk shape, for example. The portion of the valve body body 43a facing the valve seat 47b is formed of, for example, rubber.

弁体本体４３ａは、具体的には、基部４３ａ１と、ゴム部４３ａ２と、固定部材４３ａ３と、を備える。
基部４３ａ１は、第１の円筒部４７の開口より大径の円板状に構成される。 Specifically, the valve body body 43a includes a base portion 43a1, a rubber portion 43a2, and a fixing member 43a3.
The base portion 43a1 is formed in the shape of a disk having a larger diameter than the opening of the first cylindrical portion 47.

ゴム部４３ａ２は、環状に構成される。ゴム部４３ａ２は、固定部材４３ａ３により、基部４３ａ１の、一方の主面に固定される。ゴム部４３ａ２は、弁座４７ｂに当接可能に構成される。具体的には、ゴム部４３ａ２の内径は、第１の円筒部４７の内径よりも小径に構成される。ゴム部４３ａ２の外径は、第１の円筒部４７の内径よりも大径に形成される。ゴム部４３ａ２の外径は、例えば、基部４３ａ１の外径より小径に構成される。 The rubber portion 43a2 is formed in an annular shape. The rubber portion 43a2 is fixed to one main surface of the base portion 43a1 by the fixing member 43a3. The rubber portion 43a2 is configured to be able to come into contact with the valve seat 47b. Specifically, the inner diameter of the rubber portion 43a2 is configured to be smaller than the inner diameter of the first cylindrical portion 47. The outer diameter of the rubber portion 43a2 is formed to be larger than the inner diameter of the first cylindrical portion 47. The outer diameter of the rubber portion 43a2 is configured to be smaller than the outer diameter of the base portion 43a1, for example.

固定部材４３ａ３は、押え板４３ａ４と、ボルト４３ａ５と、を備える。押え板４３ａ４は、ゴム部４３ａ２の内径より大径な円板状に構成される。押え板４３ａ４は、具体的には、基部４３ａ１との間にゴム部４３ａ２の内縁部を挟持可能な程度、ゴム部４３ａ２の内径より大径な円板状に構成される。 The fixing member 43a3 includes a pressing plate 43a4 and a bolt 43a5. The presser plate 43a4 is formed in a disk shape having a diameter larger than the inner diameter of the rubber portion 43a2. Specifically, the pressing plate 43a4 is formed in a disk shape having a diameter larger than the inner diameter of the rubber portion 43a2 so that the inner edge portion of the rubber portion 43a2 can be sandwiched between the pressing plate 43a4 and the base portion 43a1.

ボルト４３ａ５は、押え板４３ａ４を、ゴム部４３ａ２を基部４３ａ１及び押え板４３ａ４により挟持させた状態で、基部４３ａ１に固定する。ボルト４３ａ５は、例えば、基部４３ａ１と同軸に配置される。 The bolt 43a5 fixes the presser plate 43a4 to the base 43a1 in a state where the rubber portion 43a2 is sandwiched between the base portion 43a1 and the presser plate 43a4. The bolt 43a5 is arranged coaxially with, for example, the base 43a1.

このように構成される弁体本体４３ａは、基部４３ａ１、ゴム部４３ａ２、及び押え板４３ａ４、が積層されることで構成される。この為、弁体本体４３ａの流入口４４側の端面は、押え板４３ａ４、ゴム部４３ａ２の外縁部、及び基部４３ａ１の外縁部により構成される。結果、弁体本体４３ａの流入口４４側の端面は、径方向で内方より外方が、基部４３ａ１に対して低い面に構成される。 The valve body body 43a configured in this way is configured by laminating a base portion 43a1, a rubber portion 43a2, and a pressing plate 43a4. Therefore, the end surface of the valve body body 43a on the inflow port 44 side is composed of the holding plate 43a4, the outer edge portion of the rubber portion 43a2, and the outer edge portion of the base portion 43a1. As a result, the end surface of the valve body body 43a on the inflow port 44 side is configured such that the outer side of the valve body body 43a is lower than the inner side in the radial direction with respect to the base portion 43a1.

弁棒４３ｂは、弁体本体４３ａと同軸に設けられる。弁棒４３ｂの一部は、弁体案内４２の第２の円筒部４８内に収容される。 The valve rod 43b is provided coaxially with the valve body body 43a. A part of the valve rod 43b is housed in the second cylindrical portion 48 of the valve body guide 42.

ばね４３ｃは、弁体本体４３ａを弁座４７ｂに当接する位置、すなわち閉位置Ｐ２に向かって付勢可能に構成される。ばね４３ｃは、弁案内４２の複数の腕部４９及び弁体本体４３ａ間に設けられる、例えばコイルばねである。ばね４３ｃの付勢力は、ポンプ３１から吐出された水の流れにより弁体４３を弁座４７ｂから離間する方向に移動する、すなわち閉位置Ｐ２から開位置Ｐ１に移動する程度の付勢力である。 The spring 43c is configured so as to be able to urge the valve body body 43a toward the position where the valve body body 43a abuts on the valve seat 47b, that is, the closed position P2. The spring 43c is, for example, a coil spring provided between the plurality of arms 49 of the valve guide 42 and the valve body body 43a. The urging force of the spring 43c is such that the valve body 43 is moved in a direction away from the valve seat 47b by the flow of water discharged from the pump 31, that is, the urging force is such that it moves from the closed position P2 to the open position P1.

連結管５０は、縮流部５２と、連結管本体５１と、を備える。連結管５０は、縮流部５２側の一端が逆止弁４０に固定される。
縮流部５２は、連結管本体５１の一端に設けられる。縮流部５２は、逆止弁４０の流出口４５に固定される。縮流部５２の流入口５２ａは、逆止弁４０の流出口４５と同径に形成される。流入口５２ａは、逆止弁４０の流出口４５と同軸に配置される。 The connecting pipe 50 includes a flow condensing portion 52 and a connecting pipe main body 51. One end of the connecting pipe 50 on the condensing portion 52 side is fixed to the check valve 40.
The condensing portion 52 is provided at one end of the connecting pipe main body 51. The condensing portion 52 is fixed to the outlet 45 of the check valve 40. The inflow port 52a of the condensing portion 52 is formed to have the same diameter as the outflow port 45 of the check valve 40. The inflow port 52a is arranged coaxially with the outflow port 45 of the check valve 40.

縮流部５２は、連結管本体５１に向かって、連結管本体５１の内径と同径となるまで漸次縮径する筒状に構成される。縮流部５２は、連結管本体５１と同軸に設けられる。縮流部５２の外径は、例えば、縮流部５２の内周面及び外周面の間の厚みを一定とする径に設定される。 The condensing portion 52 is formed in a cylindrical shape that gradually contracts toward the connecting pipe main body 51 until the diameter becomes the same as the inner diameter of the connecting pipe main body 51. The condensing portion 52 is provided coaxially with the connecting pipe main body 51. The outer diameter of the condensing portion 52 is set to, for example, a diameter that keeps the thickness between the inner peripheral surface and the outer peripheral surface of the condensing portion 52 constant.

連結管本体５１は、所定の内径を有する管状に構成される。ここで、所定の内径は、開閉弁７０の流入口７０ａと同径である。連結管本体５１の内径は、弁箱４１の流入口４４と同径に設定される。連結管本体５１の軸方向で中途部には、流量センサ６０が設置される設置部５３が設けられる。 The connecting pipe main body 51 is formed in a tubular shape having a predetermined inner diameter. Here, the predetermined inner diameter is the same as the inflow port 70a of the on-off valve 70. The inner diameter of the connecting pipe main body 51 is set to the same diameter as the inflow port 44 of the valve box 41. An installation portion 53 in which the flow rate sensor 60 is installed is provided in the middle portion in the axial direction of the connecting pipe main body 51.

設置部５３は、連結管本体５１に形成された孔部５４と、連結管本体５１の内面から突出する突出部５５と、を備える。 The installation portion 53 includes a hole portion 54 formed in the connecting pipe main body 51 and a protruding portion 55 protruding from the inner surface of the connecting pipe main body 51.

孔部５４は、図３に示すように、縮流部５２から流量センサ６０の後述する回転軸６２の軸線までの、連結管本体５１の軸線に沿う距離Ｌが、連結管本体５１の内径より長い距離となる位置に形成される。 As shown in FIG. 3, the hole portion 54 has a distance L along the axis of the connecting pipe main body 51 from the condensing portion 52 to the axis of the rotating shaft 62 described later of the flow sensor 60 from the inner diameter of the connecting pipe main body 51. It is formed at a position that is a long distance.

孔部５４は、連結管本体５１の内部と連通する形状に形成される。また、孔部５４は、流量センサ６０の一部を配置可能に形成される。また、孔部５４は、孔部５４の軸線が、連結管本体５１の軸線と直交する方向に対して平行となる孔に形成される。孔部５４の連結管本体５１内の縁には、連結管本体５１内に突出する第３の円筒部５６が形成される。第３の円筒部５６の内周面には、流量センサ６０を固定する為の雌ねじ５６ａが形成される。 The hole portion 54 is formed in a shape that communicates with the inside of the connecting pipe main body 51. Further, the hole portion 54 is formed so that a part of the flow rate sensor 60 can be arranged. Further, the hole portion 54 is formed in a hole in which the axis of the hole portion 54 is parallel to the direction orthogonal to the axis of the connecting pipe main body 51. A third cylindrical portion 56 projecting into the connecting pipe main body 51 is formed on the edge of the hole portion 54 in the connecting pipe main body 51. A female screw 56a for fixing the flow rate sensor 60 is formed on the inner peripheral surface of the third cylindrical portion 56.

突出部５５は、流量センサ６０の後述する羽根車６３と、孔部５４の軸方向で対向する。突出部５５は、流量センサ６０の後述する回転軸の一部を配置する孔部５５ａが形成される。 The protrusion 55 faces the impeller 63, which will be described later, of the flow sensor 60 in the axial direction of the hole 54. The protrusion 55 is formed with a hole 55a for arranging a part of the rotation shaft of the flow sensor 60, which will be described later.

このように構成される連結管５０は、縮流部５２の一端が弁箱４１に固定されることで、逆止弁４０と流体的に接続される。なお、縮流部５２は、逆止弁４０から水の流れに沿って、内径が連結管本体５１に向かって漸次縮径する構成となる。 The connecting pipe 50 configured in this way is fluidly connected to the check valve 40 by fixing one end of the flow condensing portion 52 to the valve box 41. The flow reduction portion 52 has a configuration in which the inner diameter is gradually reduced toward the connecting pipe main body 51 along the flow of water from the check valve 40.

図６に示すように、流量センサ６０は、連結管５０に設けられる。すなわち、流量センサ６０は、逆止弁４０の二次側に設けられる。流量センサ６０は、流量に対応した信号を出力する流量計である。流量センサ６０は、信号を制御盤１１０に送信する。 As shown in FIG. 6, the flow rate sensor 60 is provided in the connecting pipe 50. That is, the flow rate sensor 60 is provided on the secondary side of the check valve 40. The flow rate sensor 60 is a flow meter that outputs a signal corresponding to the flow rate. The flow rate sensor 60 transmits a signal to the control panel 110.

流量センサ６０は、例えば、基部６１と、回転軸６２と、羽根車６３と、羽根車６３の回転を検出する検出部６４と、を備える羽根車式流量計である。 The flow rate sensor 60 is an impeller type flow meter including, for example, a base 61, a rotating shaft 62, an impeller 63, and a detection unit 64 for detecting the rotation of the impeller 63.

基部６１は、連結管本体５１に設けられた設置部５３に設置される。基部６１は、例えば円筒状に構成される。基部６１の外周面には、設置部５３の第３の円筒部５６に形成された雌ねじ５６ａに螺合する雄ねじ８１ａが形成される。 The base portion 61 is installed in an installation portion 53 provided in the connecting pipe main body 51. The base 61 is formed, for example, in a cylindrical shape. On the outer peripheral surface of the base portion 61, a male screw 81a screwed into the female screw 56a formed in the third cylindrical portion 56 of the installation portion 53 is formed.

回転軸６２の一端部は、例えば基部６１に固定される。回転軸６２は、基部６１が設置部５３に螺合された状態で、孔部５４と同軸に設置される。回転軸６２の他端部は、突出部５５の孔部５５ａ内に配置される。 One end of the rotating shaft 62 is fixed to, for example, the base 61. The rotary shaft 62 is installed coaxially with the hole portion 54 in a state where the base portion 61 is screwed into the installation portion 53. The other end of the rotating shaft 62 is arranged in the hole 55a of the protruding portion 55.

羽根車６３は、回転軸６２に回転可能に支持される。羽根車６３は、連結管５０内を通過する水流を受けることで回転軸４１回りに回転する。 The impeller 63 is rotatably supported by the rotating shaft 62. The impeller 63 rotates around the rotation shaft 41 by receiving a water flow passing through the connecting pipe 50.

検出部６４は、例えば、回転軸６２に設けられた磁石６４ａと、磁石６４ａの回転を検出する磁気センサ６４ｃと、当該磁気センサ６４ｃと電気的に接続される検出基板６４ｂと、を備える。具体例として、磁気センサ６４ｃは、例えば、磁気検出素子である交番検知タイプのホールＩＣである。検出部６４は、羽根車６３の回転に伴う磁石６４ａの回転をパルス信号に変換する。検出部６４は、信号線等を介して制御盤１１０に電気的に接続される。検出部６４は、パルス信号を制御盤１１０に送信する。 The detection unit 64 includes, for example, a magnet 64a provided on the rotation shaft 62, a magnetic sensor 64c for detecting the rotation of the magnet 64a, and a detection substrate 64b electrically connected to the magnetic sensor 64c. As a specific example, the magnetic sensor 64c is, for example, an alternating detection type Hall IC which is a magnetic detection element. The detection unit 64 converts the rotation of the magnet 64a accompanying the rotation of the impeller 63 into a pulse signal. The detection unit 64 is electrically connected to the control panel 110 via a signal line or the like. The detection unit 64 transmits a pulse signal to the control panel 110.

開閉弁７０は、図２及び図３に示すように、連結管５０の二次側に固定される。具体的には、開閉弁７０は、連結管５０の流出口５２ｂに固定される。開閉弁７０の流入口７０ａは、連結管５０の流出口５２ｂと同軸に設けられる。開閉弁７０の流入口７０ａ、及び開閉弁７０の流出口７０ｂは、同径に形成される。開閉弁７０は、連結管５０から合流管８０に連続する流路を開放または閉止可能に構成される。開閉弁７０は、例えば、ボール弁である。 The on-off valve 70 is fixed to the secondary side of the connecting pipe 50 as shown in FIGS. 2 and 3. Specifically, the on-off valve 70 is fixed to the outlet 52b of the connecting pipe 50. The inflow port 70a of the on-off valve 70 is provided coaxially with the outflow port 52b of the connecting pipe 50. The inflow port 70a of the on-off valve 70 and the outflow port 70b of the on-off valve 70 are formed to have the same diameter. The on-off valve 70 is configured to be able to open or close the flow path continuous from the connecting pipe 50 to the merging pipe 80. The on-off valve 70 is, for example, a ball valve.

開閉弁７０は、具体的には、弁箱７１と、弁体７２と、操作レバー７３と、を備える。操作レバー７３は、開閉弁７０を開閉する際に作業員により操作可能に構成される。 Specifically, the on-off valve 70 includes a valve box 71, a valve body 72, and an operation lever 73. The operation lever 73 is configured to be operable by an operator when opening and closing the on-off valve 70.

図１に示すように、合流管８０は、ポンプ３１から開閉弁７０までの流路を連結する。具体的には、複数の開閉弁７０を連結する。また、合流管８０は、給水先に連通する配管が接続される。合流管８０は、各連結管５０を通過した水を合流させ、接続された配管に連通する二次側への流路を形成する。 As shown in FIG. 1, the combined pipe 80 connects the flow path from the pump 31 to the on-off valve 70. Specifically, a plurality of on-off valves 70 are connected. Further, the merging pipe 80 is connected to a pipe that communicates with the water supply destination. The merging pipe 80 joins the water that has passed through each connecting pipe 50 and forms a flow path to the secondary side that communicates with the connected pipe.

圧力センサ１００は、合流管８０に設けられる。圧力センサ１００は、合流管８０内の圧力を検出可能に構成される。圧力センサ１００は、信号線等を介して制御盤１１０に電気的に接続される。圧力センサ１００は、検出した圧力を信号に変換し、信号を制御盤１１０に送信する。 The pressure sensor 100 is provided in the confluence pipe 80. The pressure sensor 100 is configured to be able to detect the pressure in the confluence pipe 80. The pressure sensor 100 is electrically connected to the control panel 110 via a signal line or the like. The pressure sensor 100 converts the detected pressure into a signal and transmits the signal to the control panel 110.

制御盤１１０は、流量センサ６０からの信号、及び圧力センサ１００からの信号に基づいて、ポンプ装置３０のモータを制御する。 The control panel 110 controls the motor of the pump device 30 based on the signal from the flow sensor 60 and the signal from the pressure sensor 100.

次に、給水装置１０の動作の一例を説明する。 Next, an example of the operation of the water supply device 10 will be described.

ポンプ３１から吐出された水は、逆止弁４０の流入口４４に流入する。流入口４４に水が流入することで、弁体４３は、ばね４３ｃの付勢力に抗って閉位置Ｐ２から開位置Ｐ１に向かって移動する。弁体４３が閉位置Ｐ２から移動することで、弁箱４１内に水が流入する。 The water discharged from the pump 31 flows into the inflow port 44 of the check valve 40. When water flows into the inflow port 44, the valve body 43 moves from the closed position P2 to the open position P1 against the urging force of the spring 43c. As the valve body 43 moves from the closed position P2, water flows into the valve box 41.

弁箱４１内に流入した水は、弁体本体４３ａの周囲を通過し、流出口４５を通過して連結管５０に流入する。水が弁体本体４３ａの周囲を通過して流出口４５から連結管５０に流出する間に、流路断面における偏流が解消される。連結管５０に流入した水は、羽根車６３を通過することで、羽根車６３を回転する。 The water flowing into the valve box 41 passes around the valve body main body 43a, passes through the outlet 45, and flows into the connecting pipe 50. While the water passes around the valve body body 43a and flows out from the outlet 45 to the connecting pipe 50, the drift in the cross section of the flow path is eliminated. The water flowing into the connecting pipe 50 passes through the impeller 63 to rotate the impeller 63.

次に、流量センサ６０のメンテナンス作業の一例を説明する。流量センサ６０のメンテナンス作業の際には、まず、メンテナンスを行う流量センサ６０の一次側のポンプ装置３０の駆動を停止する。次に、操作レバー７３を操作することで、開閉弁７０を閉じる。開閉弁７０を閉じることで、合流管８０からの水が規制される。次に、流量センサ６０を、連結管５０の設置部５３から取り外す。そして、メンテナンス後の流量センサ６０を設置部５３に設置した後に、開閉弁７０を開く。 Next, an example of the maintenance work of the flow rate sensor 60 will be described. When performing maintenance work on the flow rate sensor 60, first, the driving of the pump device 30 on the primary side of the flow rate sensor 60 to be maintained is stopped. Next, the on-off valve 70 is closed by operating the operating lever 73. By closing the on-off valve 70, the water from the confluence pipe 80 is regulated. Next, the flow rate sensor 60 is removed from the installation portion 53 of the connecting pipe 50. Then, after the flow rate sensor 60 after maintenance is installed in the installation unit 53, the on-off valve 70 is opened.

また、逆止弁４０のメンテナンス作業においても、同様の手順で、逆止弁４０を取り外して、弁体４３などの消耗部品を交換できる。 Further, in the maintenance work of the check valve 40, the check valve 40 can be removed and consumable parts such as the valve body 43 can be replaced by the same procedure.

このように構成される給水装置１０では、流量センサ６０は、連結管５０に設けられる。すなわち、流量センサ６０は、逆止弁４０の二次側に設けられる。この為、ポンプ３１から吐出された水が逆止弁４０を通過することで流路断面の偏流が解消され、羽根車６３が設けられる連結管５０内の流路断面に偏流が生じることが抑制される。結果、流量センサ６０の検出の精度が低下することを抑制できる。 In the water supply device 10 configured in this way, the flow rate sensor 60 is provided in the connecting pipe 50. That is, the flow rate sensor 60 is provided on the secondary side of the check valve 40. Therefore, when the water discharged from the pump 31 passes through the check valve 40, the drift in the cross section of the flow path is eliminated, and the drift in the cross section of the flow path in the connecting pipe 50 provided with the impeller 63 is suppressed. Will be done. As a result, it is possible to suppress a decrease in the detection accuracy of the flow rate sensor 60.

特に、本実施形態のように、流量センサ６０が、水の通過により回転する羽根車６３を備える羽根車式の流量センサに対して、有効である。この効果について、具体的に説明する。羽根車６３は、羽根車６３を通過する水により回転し、回転に応じた信号を出力する。この為、流量断面に偏流が生じないことにより、羽根車６３の回転数は、流量に比例するので、流量と羽根車６３の回転数との直線性が保たれる。結果、流量センサ６０の検出精度の低下が抑制される。 In particular, as in the present embodiment, the flow rate sensor 60 is effective for an impeller type flow rate sensor including an impeller 63 that rotates by passing water. This effect will be specifically described. The impeller 63 is rotated by the water passing through the impeller 63, and outputs a signal corresponding to the rotation. Therefore, since the unbalanced flow does not occur in the flow rate cross section, the rotation speed of the impeller 63 is proportional to the flow rate, so that the linearity between the flow rate and the rotation speed of the impeller 63 is maintained. As a result, the decrease in the detection accuracy of the flow rate sensor 60 is suppressed.

さらに、流量センサ６０の二次側に開閉弁７０が設けられることで、流量センサ６０のメンテナンスを行うことが可能となる。 Further, by providing the on-off valve 70 on the secondary side of the flow rate sensor 60, it is possible to perform maintenance on the flow rate sensor 60.

さらに、弁体本体４３ａは、基部４３ａ１、ゴム部４３ａ２、押え板４３ａ４、及びボルト４３ａ５を備える。この為、弁体本体４３ａの流入口４４側の端面は、径方向で内方より外方の方が、基部４３ａ１に対する高さが低くなる面に構成される。 Further, the valve body body 43a includes a base portion 43a1, a rubber portion 43a2, a holding plate 43a4, and a bolt 43a5. Therefore, the end surface of the valve body body 43a on the inflow port 44 side is configured to have a lower height with respect to the base portion 43a1 on the outer side than on the inner side in the radial direction.

このように、弁体本体４３ａの流入口４４側の端面が複雑な面に構成されることで、水が弁体本体４３ａの端面に当たって弁体本体４３ａの周囲に回り込む際に、偏流が効率よく解消される。 In this way, the end surface of the valve body 43a on the inflow port 44 side is configured as a complicated surface, so that when water hits the end surface of the valve body 43a and wraps around the valve body 43a, the drift is efficiently performed. It will be resolved.

さらに、縮流部５２の流入口５２ａの口径、及び、逆止弁４０の流出口４５を同径に設定し、連結管本体５１の内径を開閉弁７０の流入口７０ａと同径に設定した。この為、ポンプ３１の二次側の流れを円滑にすることが可能となる。 Further, the diameter of the inlet 52a of the condensing portion 52 and the outlet 45 of the check valve 40 are set to the same diameter, and the inner diameter of the connecting pipe main body 51 is set to the same diameter as the inlet 70a of the on-off valve 70. .. Therefore, it is possible to smooth the flow on the secondary side of the pump 31.

さらに、縮流部５２から流量センサ６０の回転軸６２の軸線までの長さＬを、連結管本体５１の内径以上とすることで、流路断面積が一定となる連結管本体５１内において、縮流部５２から流量センサ６０までの距離を長くできる。この為、流量センサ６０を通過する水の流れをより安定させることが可能となる。この為、流量センサ６０の検出精度をより安定させることが可能となる。 Further, in the connecting pipe main body 51 where the flow path cross-sectional area is constant by setting the length L from the flow condensing portion 52 to the axis of the rotating shaft 62 of the flow sensor 60 to be equal to or larger than the inner diameter of the connecting pipe main body 51. The distance from the flow condensing portion 52 to the flow rate sensor 60 can be increased. Therefore, it becomes possible to further stabilize the flow of water passing through the flow rate sensor 60. Therefore, the detection accuracy of the flow rate sensor 60 can be made more stable.

なお、上述の例では、開閉弁７０は、連結管５０とは別体に形成される構成が一例として説明されたが、これに限定されない。他の例では、図７に示すように、開閉弁７０の弁箱７１を、連結管５０と一体に構成しても良い。この構成によれば、部品点数を削減できることから、部品コストを削減でき、さらに、給水装置１０の組み立て作業の工程数を削減できる。 In the above example, the configuration in which the on-off valve 70 is formed separately from the connecting pipe 50 has been described as an example, but the present invention is not limited to this. In another example, as shown in FIG. 7, the valve box 71 of the on-off valve 70 may be integrally configured with the connecting pipe 50. According to this configuration, since the number of parts can be reduced, the cost of parts can be reduced, and the number of steps of assembling the water supply device 10 can be reduced.

なお、本発明は、上記実施形態に限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で種々に変形することが可能である。また、各実施形態は適宜組み合わせて実施してもよく、その場合組み合わせた効果が得られる。更に、上記実施形態には種々の発明が含まれており、開示される複数の構成要件から選択された組み合わせにより種々の発明が抽出され得る。例えば、実施形態に示される全構成要件からいくつかの構成要件が削除されても、課題が解決でき、効果が得られる場合には、この構成要件が削除された構成が発明として抽出され得る。
以下に、本願出願の当初の特許請求の範囲に記載された発明と同等の記載を付記する。
［１］
水を増圧して二次側に吐出するポンプと、
前記ポンプの二次側に設けられて、二次側への流れを許容し、一次側への流れを規制する逆止弁と、
前記逆止弁の吐出口に連結される連結管と、
前記連結管に設けられて、流量を検出する流量センサと、
を備え、
前記流量センサは、
水の流れにより回転する羽根車と、
前記羽根車の回転を検出し、前記羽根車の回転に応じた信号を出力する検出部と、
を備える給水装置。
［２］
前記ポンプが複数設けられ、
複数の前記ポンプのそれぞれの二次側に設けられる前記連結管が合流する合流管と、
前記流量センサの二次側であって前記合流管の一次側に設けられる開閉弁と、
を備える、［１］に記載の給水装置。
［３］
前記連結管の流入口、及び、前記逆止弁の流出口は、同径に形成され、
前記連結管は、前記流入口から漸次縮径する縮径部、及び、前記縮径部の二次側に形成
され、内径が一定の連結管本体と、を具備し、
前記縮径部から前記羽根車の軸線までの距離は、前記連結管本体の前記内径以上の長さ
に設定される、
［１］に記載の給水装置。
［４］
前記開閉弁は、前記連結管に設けられる、［２］に記載の給水装置。 The present invention is not limited to the above embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, in which case the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent elements are deleted can be extracted as an invention.
The following is a description equivalent to the invention described in the claims of the original application of the present application.
[1]
A pump that boosts water and discharges it to the secondary side,
A check valve provided on the secondary side of the pump to allow flow to the secondary side and regulate flow to the primary side.
A connecting pipe connected to the discharge port of the check valve and
A flow rate sensor provided on the connecting pipe to detect the flow rate,
Equipped with
The flow sensor is
An impeller that rotates due to the flow of water,
A detection unit that detects the rotation of the impeller and outputs a signal corresponding to the rotation of the impeller.
A water supply device equipped with.
[2]
Multiple pumps are provided,
A confluence pipe provided on the secondary side of each of the plurality of pumps to which the connecting pipes merge, and a confluence pipe.
An on-off valve provided on the secondary side of the flow sensor and on the primary side of the combined pipe,
The water supply device according to [1].
[3]
The inlet of the connecting pipe and the outlet of the check valve are formed to have the same diameter.
The connecting pipe is formed on a reduced diameter portion that gradually reduces in diameter from the inflow port and on the secondary side of the reduced diameter portion.
And equipped with a connecting pipe body with a constant inner diameter,
The distance from the reduced diameter portion to the axis of the impeller is a length equal to or greater than the inner diameter of the connecting pipe body.
Set to,
The water supply device according to [1].
[4]
The water supply device according to [2], wherein the on-off valve is provided in the connecting pipe.

１０…給水装置、２０…ベース、３０…ポンプ装置、３１…ポンプ、４０…逆止弁、４１…弁箱、４３…弁体、４３ａ…弁体本体、４３ｂ…弁棒、４４…流入口、４５…流出口、４６…リブ、４６ａ…端面、４７…第１の円筒部、４７ａ…端部、４７ｂ…弁座、４８…第２の円筒部、４９…腕部、４９ａ…孔、５０…連結管、５１…連結管本体、５２…縮流部、５３…設置部、５４…孔部、５５…突出部、５５ａ…孔部、５６…円筒部、６０…流量センサ、６１…基部、６２…回転軸、６３…羽根車、６４…検出部、６４ａ…磁石、６４ｂ…検出基板、６４ｃ…磁気センサ、７０…開閉弁、７１…弁箱、７２…弁体、７３…操作レバー、８０…合流管、９０…蓄圧装置、１００…圧力センサ、１１０…制御盤、Ｐ１…開位置、Ｐ２…閉位置。 10 ... water supply device, 20 ... base, 30 ... pump device, 31 ... pump, 40 ... check valve, 41 ... valve box, 43 ... valve body, 43a ... valve body body, 43b ... valve rod, 44 ... inflow port, 45 ... outlet, 46 ... rib, 46a ... end face, 47 ... first cylinder, 47a ... end, 47b ... valve seat, 48 ... second cylinder, 49 ... arm, 49a ... hole, 50 ... Connecting pipe, 51 ... Connecting pipe body, 52 ... Condensing part, 53 ... Installation part, 54 ... Hole part, 55 ... Protruding part, 55a ... Hole part, 56 ... Cylindrical part, 60 ... Flow sensor, 61 ... Base, 62 ... rotating shaft, 63 ... impeller, 64 ... detector, 64a ... magnet, 64b ... detection board, 64c ... magnetic sensor, 70 ... on-off valve, 71 ... valve box, 72 ... valve body, 73 ... operating lever, 80 ... Confluence pipe, 90 ... accumulator, 100 ... pressure sensor, 110 ... control panel, P1 ... open position, P2 ... closed position.

Claims

A pump that boosts water and discharges it to the secondary side,
A check valve provided on the secondary side of the pump to allow flow to the secondary side and regulate flow to the primary side.
A connecting pipe connected to the discharge port of the check valve and
A flow rate sensor provided on the connecting pipe to detect the flow rate,
Equipped with
The flow sensor is
An impeller that rotates due to the flow of water,
A detection unit that detects the rotation of the impeller and outputs a signal corresponding to the rotation of the impeller.
Equipped with
The check valve comprises a valve box and a valve body that is housed in the valve box and can move between a closed position that abuts on the valve seat of the valve box and an open position that separates from the valve seat.
The valve body includes a valve body body and a spring that urges the valve body body to the closed position.
The valve body body includes a base, a rubber portion that abuts on the valve seat, a holding plate, and a bolt.
The base is formed in the shape of a disk and is formed in the shape of a disk.
The rubber portion is formed in an annular shape having an outer diameter smaller than the outer diameter of the base portion.
The presser plate is formed in a disk shape having an outer diameter larger than the inner diameter of the rubber portion and a smaller diameter than the outer diameter of the rubber portion.
The presser plate, the rubber portion, and the base portion are sequentially arranged side by side from the valve seat side, and the presser plate has the rubber portion sandwiched between the presser plate and the base portion, and the base portion is provided by the bolt. The bolt is arranged coaxially with the base and the head is arranged on the holding plate side.
The end face on the valve seat side of the valve body body composed of the base portion, the rubber portion, the holding plate, and the bolt is configured such that the outer side is lower than the inner side in the radial direction with respect to the base part. Ru,
Water supply device.

Multiple pumps are provided,
A confluence pipe provided on the secondary side of each of the plurality of pumps to which the connecting pipes merge, and a confluence pipe.
An on-off valve provided on the secondary side of the flow sensor and on the primary side of the combined pipe,
The water supply device according to claim 1.

The inlet of the connecting pipe and the outlet of the check valve are formed to have the same diameter.
The connecting pipe includes a reduced diameter portion that gradually reduces in diameter from the inlet, and a connecting pipe main body that is formed on the secondary side of the reduced diameter portion and has a constant inner diameter.
The distance from the reduced diameter portion to the axis of the impeller is set to a length equal to or larger than the inner diameter of the connecting pipe body.
The water supply device according to claim 1.

The water supply device according to claim 2, wherein the on-off valve is provided in the connecting pipe.