JP2013050004A - Water service installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water service installation capable of avoiding a water failure as much as possible.SOLUTION: A water service installation 1 for intensifying the pressure of water branching from a water main P to supply the water to a structure G includes: a first pump unit 12 in which a plurality of first pressure intensifying circuit sections 16 for intensifying the pressure of the water branching from the water main P and a bypass circuit section 17 are provided in parallel to each other, and a decompression type back flow preventing device 15 is also provided on the secondary side of the first pressure intensifying circuit sections 16 and the bypass circuit section 17; a second pump unit 32 in which a plurality of second pressure intensifying circuit sections 36 are connected in series to one another for intensifying the pressure of the water from the first pump unit 12, and which is provided in a hierarchy different from the first pump unit 12 and connected in series to the secondary side of the first pump unit 12; a pressure sensor 19 provided on the primary side of the first pressure intensifying circuit sections 16 and the bypass circuit section 17 for detecting the pressure of the branching water; and a control panel 13 for controlling the operation and stop of the first pressure intensifying circuit sections 16 using the pressure of the branching water detected by the pressure sensor 19.

Description

  The present invention relates to a water supply apparatus that increases pressure and supplies water to a building.

  Currently, as a method for supplying water to a high-rise building, a water supply apparatus is known in which a pressure-increasing water supply unit is directly connected to a water main and a plurality of pressure-increasing water supply units are connected in series (for example, Patent Document 1). reference). The water supply device drives and controls the pump of the pressure increase circuit unit of the pressure increase water supply unit according to the pressure to increase the pressure of water. The water supply apparatus can supply water from the water main directly to the higher floors by connecting the pressure increasing water supply unit in series.

  In such a water supply device, a depressurization type backflow prevention device is provided on the primary side of the pressure increasing circuit portion of the pressure increasing water supply unit in order to prevent water from flowing back into the water main.

JP 2008-223269 A

  The water supply apparatus described above has the following problems. That is, the water supply apparatus mentioned above has a possibility that the pressure of a water main may fall with the field or time zone. When the pressure of the main water pipe becomes equal to or lower than a predetermined pressure, the suction pressure is insufficient in the pump of the pressure-increasing circuit unit, and there is a possibility that the supply of water to the building is stopped due to the inability to pump and the water is shut off.

  Then, an object of this invention is to provide the water supply apparatus which can avoid water cutoff as much as possible.

  In order to solve the problems and achieve the object, the water supply apparatus of the present invention is configured as follows.

  As one aspect of the present invention, in a water supply apparatus that supplies water to a building by increasing the pressure branched from the water main, the water branched from the water main provided in parallel is increased. A first pump unit having a plurality of first pressure-increasing circuit units and bypass circuit units, and a decompression-type backflow prevention device provided on the secondary side of the first pressure-increasing circuit unit and the bypass circuit unit; A plurality of second pressure-increasing circuit units connected in parallel to increase the pressure of water from the first pump unit, provided at a different level from the first pump unit, and on the secondary side of the first pump unit; A second pump unit connected in series, a pressure sensor that is provided on the primary side of the first pressure-increasing circuit unit and the bypass circuit unit, and that detects the pressure of the branched water, and is detected by the pressure sensor. Said The pressure of Toki water, and a control panel for controlling the operation and stop of the first increase pressure circuit portion.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the water supply apparatus which can avoid water cutoff as much as possible.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory drawing which shows typically the structure of the water supply apparatus which concerns on one embodiment of this invention. Explanatory drawing which shows typically the structure of the 1st pressure increase water supply unit used for the same water supply apparatus. Explanatory drawing which shows typically the structure of the 2nd pressure increase water supply unit used for the same water supply apparatus. Explanatory drawing which shows typically the structure of the 1st pressure increase water supply unit used for the water supply apparatus which concerns on the modification of this invention.

Hereinafter, the water supply apparatus 1 which concerns on one Embodiment of this invention is demonstrated using FIG. 1 thru | or FIG.
FIG. 1 is an explanatory diagram schematically illustrating the configuration of a water supply apparatus 1 according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram schematically illustrating the configuration of a first pressure increasing water supply unit 10 used in the water supply device 1. FIG. 3 is an explanatory view schematically showing the configuration of the second pressure increasing water supply unit 30 used in the water supply apparatus 1. In FIG. 1, E indicates the ground, G indicates a building, H indicates the direction of water flow, P indicates a water main, and T indicates a water supply port.

  For example, the water supply device 1 is provided in a high-rise building G and is directly connected to the branch pipe 5 of the water main pipe P, and a plurality of pressure-increasing water supply units are connected in series, and are installed at different levels. In addition, it is a so-called direct connection pressure increasing water supply system. The water supply device 1 supplies the water whose pressure has been increased to a predetermined height by each of the pressure-increasing water supply units, and when another pressure-increasing water supply unit is provided on the secondary side, It is formed so that water can be supplied to the pressure water supply unit.

  As shown in FIG. 1, the water supply device 1 includes a meter unit (quantifier) 6 connected to the branch pipe 5 of the water main pipe P, and a first pressure increase connected to the secondary side of the meter unit 6. A water supply unit 10 and a second pressure increase water supply unit 30 connected in series to the secondary side of the first pressure increase water supply unit 10 are provided.

  The water supply apparatus 1 includes a first accumulator 51 provided on the secondary side of the first pressure-increasing water supply unit 10, a second accumulator 52 provided on the primary side of the second pressure-increasing water supply unit 30, and a second pressure increase. And a third accumulator 53 provided on the secondary side of the water supply unit 30.

In addition, in this embodiment, the water supply apparatus 1 is demonstrated using the structure which connected the 2nd 2nd pressure increase water supply unit 30 in series to the secondary side of the 1st pressure increase water supply unit 10. FIG.

  The meter unit 6 is connected to the first pressure increasing water supply unit 10 via a pipe 7. The meter unit 6 is formed of, for example, a meter bypass unit in which a primary pipe and a secondary side of a meter are branched to provide a bypass pipe. Further, such a meter unit 6 has a flow path switching valve capable of switching the flow path between the meter side and the bypass pipe side on the primary side of the meter, and a gate valve for partitioning the flow path on the secondary side of the meter. ing. For example, the meter unit 6 is provided in a meter groove 6a provided on the ground E, and is installed so as not to be exposed to the outside air by the lid 6b.

  As for the 1st pressure increase water supply unit 10, one of the 2nd pressure increase water supply units 30 is connected to the secondary side via the water supply piping 11. FIG. In addition, in the water supply pipe 11, the middle part of each water supply pipe 11 branches in several, and each water supply port T, such as a faucet, is provided in the edge part. The first pressure increasing water supply unit 10 includes a first pump unit 12 and a control panel 13 connected to the first pump unit 12 via a signal line S.

  As shown in FIG. 2, the first pump unit 12 is connected to the pipe 7 on the primary side, and the secondary side is each water supply port T and the middle level provided in the level FL that is a lower level of the building G. The second pressurized water supply unit 30 that supplies water to the floor FM is connected via the water supply pipe 11. That is, the 1st pump unit 12 supplies water to the 2nd pressure increase water supply unit 30 supplied to the water supply opening T and the level FM of the hierarchy FL of the building G. FIG.

  The first pump unit 12 includes a backflow prevention device 15, a first pressure increase circuit unit 16, a bypass circuit unit 17, and a first pressure tank 18. Specifically, the first pump unit 12 is connected to the pipe 7, and a plurality of first pressure-increasing circuit parts 16 and bypass circuit parts 17 provided in parallel when the pipe 7 branches off, A backflow prevention device 15 provided in the secondary water supply pipe 11 where the pressure circuit portion 16 and the bypass circuit portion 17 have joined, and a first pressure tank 18 provided on the secondary side of the backflow prevention device 15. ing.

  The first pump unit 12 includes a pressure sensor 19 provided on the primary side of the first pressure-increasing circuit unit 16 and the bypass circuit unit 17 and the secondary side of the backflow prevention device 15, the first pressure-increasing circuit unit 16, A flow rate sensor 20 provided on the secondary side of the bypass circuit unit 17 and on the primary side of the backflow prevention device 15, and a gate valve 21 manually opened and closed provided on the secondary side of the pressure sensor 19 and the flow rate sensor 20. And. Such a first pump unit 12 is controlled by the control panel 13 on the basis of information detected by the pressure sensor 19 and the flow sensor 20, so that the plurality of first pressure-increasing circuit units 16 are operated alternately. .

  The backflow prevention device 15 is a decompression type backflow prevention device. For example, two systems of the first booster circuit unit 16 are provided. The first pressure-increasing circuit unit 16 includes a manual gate valve 22, a multistage pump 23 having a plurality of impellers, to which a motor is connected via a rotating shaft, a check valve 24, and a gate valve 22 in order from the primary side. It is connected. The motor is connected to the control panel 13 via a signal line S, and is configured to be controllable by the control panel 13. Further, the two systems of the first booster circuit section 16 are formed in the same configuration.

  The bypass circuit unit 17 has a check valve 27 at an intermediate position thereof. The first pressure tank 18 is on the secondary side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17 and on the primary side of the gate valve 21, and in the vicinity of the pressure sensor 19 on the secondary side of the backflow prevention device 15. Is provided. In the present embodiment, the first pressure tank 18 is disposed on the secondary side of the backflow prevention device 15 and on the primary side of the pressure sensor 19.

  The pressure sensors 19 are respectively connected to the control panel 13, can detect the pressure on the primary side and the secondary side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17, and transmit the detected information to the control panel 13. It is made possible.

  The flow rate sensor 20 is connected to the control panel 13 and is configured to be able to detect the flow rate on the secondary side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17 and to transmit the detected information to the control panel 13. ing.

  The control panel 13 includes an inverter and performs alternate operation control by the plurality of first pressure increase circuit units 16 based on information detected by the pressure sensor 19 and the flow rate sensor 20. The control panel 13 operates the pump 23 when the pressure detected by the pressure sensor 19 provided on the primary side of the first pressure-increasing circuit unit 16 and the bypass circuit unit 17 is equal to or higher than a predetermined pressure. When is below a predetermined pressure, the operation of the pump 23 is stopped.

  Here, the predetermined pressure refers to a branch pipe provided with a water supply apparatus other than the main water supply apparatus 1 when the first pump unit 12 is driven, that is, adjacent to the branch pipe 5 provided with the main water supply apparatus 1. In the other branch pipe, the pressure is such that the water in the other branch pipe may flow backward to the water main pipe P. In other words, the predetermined pressure means that when the water supply device 1 increases the water supply pressure, the pressure of the water main pipe P further decreases, and the water of the other branch pipe may flow back to the water main pipe P. Pressure.

  The second pressure increase water supply unit 30 is connected to the first pressure increase water supply unit 10 via the water supply pipe 11. The second pressure-increasing water supply unit 30 connected to the first pressure-increasing water supply unit 10 is connected to one of the second pressure-increasing water supply units 30 via a water supply pipe 31 on the secondary side. Moreover, the 2nd pressure | voltage increase water supply unit 30 of the most downstream is provided with the water supply piping 31 in the secondary side. In these water supply pipes 31, the middle part of each water supply pipe 31 branches into a plurality, and each water supply port T such as a faucet is provided at an end thereof.

  The second pressure increasing water supply unit 30 includes a second pump unit 32 and a control panel 33 connected to the second pump unit 32 via a signal line S.

  The second pump unit 32 includes a plurality of second pressure-increasing circuit units provided in parallel by branching backflow prevention device 35 provided in water supply piping 31 and water supply piping 31 on the secondary side of backflow prevention device 35. 36 and a bypass circuit unit 37, and a second pressure tank 38 provided in the secondary water supply pipe 31 where the second pressure increasing circuit unit 36 and the bypass circuit unit 37 merge. The second pump unit 12 includes a pressure sensor 39 provided on the primary side of the backflow prevention device 15 and the secondary side of the first pressure tank 18, and a flow rate sensor provided on the secondary side of the first pressure tank 18. 40 and a gate valve 41 provided on the secondary side of the pressure sensor 39 and the flow rate sensor 40 for manually opening and closing.

  The backflow prevention device 35 is a decompression type, single type, or double type backflow prevention device. For example, two systems of the second pressure increasing circuit unit 36 are provided. The second pressure increasing circuit section 36 includes, from the primary side, a manual gate valve 42, a multistage pump 43 having a plurality of impellers connected to a motor via a rotating shaft, a check valve 44, and a gate valve 42 in order. It is connected.

  The pump 43 is formed so that a water flow path can be secured when the pump 43 is stopped. The pump 43 may be a single stage as long as water can pass at the time of stoppage, or may be configured to increase the pressure of water by means other than the impeller, for example. The motor is connected to the control panel 13 via a signal line S, and is configured to be controllable by the control panel 33. Further, the two systems of the second booster circuit section 36 are formed in the same configuration.

  The second pressure tank 38 is provided in the vicinity of the pressure sensor 39 on the secondary side of the second pressure increasing circuit unit 36 and on the primary side of the gate valve 41 and on the secondary side of the second pressure increasing circuit unit 36. It is done. In the present embodiment, the second pressure tank 38 is disposed on the secondary side of the second pressure increasing circuit unit 36 and on the primary side of the pressure sensor 39.

  The pressure sensors 39 are respectively connected to the control panel 33, can detect the pressures on the primary side and the secondary side of the second pressure increasing circuit unit 36 and the bypass circuit unit 37, and transmit the detected information to the control panel 33. It is made possible.

  The flow rate sensor 20 is connected to the control panel 33 and is configured to be able to detect the flow rate on the secondary side of the second pressure increasing circuit unit 36 and the bypass circuit unit 37 and to transmit the detected information to the control panel 33. ing.

  The control panel 33 includes an inverter and performs alternate operation control by the plurality of first pressure increase circuit units 36 based on information detected by the pressure sensor 39 and the flow rate sensor 40.

  The first accumulator 51 is provided on the secondary side of the first pressure-increasing water supply unit 10 and on the same level as the first pressure-increasing water supply unit 10. The first accumulator 51 may be single or plural as long as it has a capacity capable of reducing the pulsation of the water discharged from the first pressure increasing water supply unit 10.

  The second accumulators 52 are respectively provided on the primary side of the second pressure increasing water supply unit 30. Moreover, the 2nd accumulator 52 is provided in the same hierarchy as the 2nd pressure increase water supply unit 30 provided. The second accumulator 52 has the same capacity as the first accumulator 51. The second accumulator 52 has a capacity capable of reducing the pulsation of the water supplied to the second pressure-increasing water supply unit 30, in other words, sucked in. If the same capacity as the first accumulator 51 is provided, the second accumulator 52 is singular. There may be more than one.

  The third accumulator 53 is provided on the secondary side of the second pressure increasing water supply unit 30. Moreover, the 3rd accumulator 53 is provided in the same hierarchy as the 2nd pressure increase water supply unit 30 provided. The third accumulator 53 has the same capacity as the first accumulator 51 and the second accumulator. The third accumulator 53 has a capacity capable of reducing the pulsation of the water discharged from the second pressure-increasing water supply unit 30 and is singular if it has the same capacity as the first accumulator 51 and the second accumulator 52. There may be more than one.

  The first accumulator 51 and the second accumulator 52, and the third accumulator 53 and the second accumulator 52 provided on the primary side of the second pressure increasing water supply unit 30 on the secondary side of the third accumulator 53 are enclosed. The pressure value is set to an enclosed pressure value obtained by converting the height difference to be arranged into a pressure. That is, in the first accumulator 51 and the second accumulator 52 closest to the secondary side of the first accumulator 51, the sealed pressure value of the first accumulator 51 is higher than the second accumulator 52 by the height of the second accumulator 52. High pressure is set. Similarly, the sealed pressure value of the third accumulator 53 is set to be higher than that of the second accumulator 52 nearest to the secondary side.

  In the water supply device 1 configured as described above, the water supply device 1 is driven, and the pressure on the primary side of the first pressure increase circuit unit 16 and the bypass circuit unit 17 of the first pressure increase water supply unit 10 is equal to or higher than a predetermined pressure. Then, the motors are driven by the control panels 13 and 33 to operate the pumps 23 and 43 so that the water branched from the water main P can be supplied to the water supply ports T of the respective floors FL, FM and FH. .

  Specifically, first, when the pressure sensor 19 on the primary side of the first pressure-increasing circuit unit 16 and the bypass circuit unit 17 detects that the pressure is equal to or higher than a predetermined pressure, the pump 23 is driven by the control panel 13. The first pressure increasing water supply unit 10 is provided with a water supply port T that is a supply destination of water supplied from the branch pipe 5 by the pump 23 of the first pump unit 12 and a second pressure increasing water supply unit 30 on the secondary side. The water pressure is increased to the level required to supply to each of the floors FL and FM and supplied to the secondary side. Thus, water can be supplied from the water supply port T by supplying water to the water supply port T provided in the floor FL which is a lower floor.

  Further, the water pumped up to the level where the second pressure-increasing water supply unit 30 on the secondary side of the first pressure-increasing water supply unit 10 is provided is supplied to the second pressure-increasing water supply unit 30. The second pressure-increasing water supply unit 30 uses the pump 43 provided in the second pump unit 32 to supply the water supplied from the first pressure-increasing water supply unit 10 to the supply destination water supply port T and the secondary side second pressure increase. The water pressure is increased to the water pressure necessary to supply to each of the floors FM and FH provided with the water supply unit 30 and supplied to the secondary side. And as shown in FIG. 1, water can be supplied from the water supply port T by supplying water to the water supply port T provided in the hierarchy FM which is a middle floor.

  Similarly, the second pressure-increasing water supply unit 30 provided on the secondary side of the second pressure-increasing water supply unit 30 is increased to the water pressure necessary to supply the floor FH, which is a higher floor, It is supplied to the water supply port T provided.

  When the primary pressure sensor 19 on the primary pressure increasing circuit unit 16 and the bypass circuit unit 17 detects that the pressure is equal to or lower than a predetermined pressure, the control panel 13 stops the motor and stops driving the pump 23. .

  According to the water supply device 1 configured as described above, water supply to a higher floor becomes possible by the first pressure increase water supply unit 10 and the second pressure increase water supply unit 30 connected in series. Moreover, the water supply apparatus 1 is a pressure-reducing type for preventing a backflow to the pressure increasing water supply unit connected to the branch pipe 5 of the water main pipe P, that is, the water main pipe P provided in the first pressure increasing water supply unit 10. By providing the backflow prevention device 15 on the secondary side of the first pressure increasing circuit portion 16 and the bypass circuit portion 17, it is possible to prevent pressure loss on the primary side of the pump 23. As a result, the suction side of the pump 23 can prevent a decrease in pressure by the backflow prevention device 15, and stoppage of the pumping function due to insufficient suction side pressure, that is, avoidance of water cutoff as much as possible.

  More specifically, the backflow prevention device 15 has a large pressure loss due to its configuration. Therefore, when the backflow prevention device 15 passes through the backflow prevention device 15 from the branch pipe 5 branched from the water main pipe P, the pressure loss of the water main pipe P is caused by the pressure loss. Than the pressure is reduced.

  However, in the water supply apparatus 1 of the present embodiment, the pressure for controlling the stop of the pump 23 is the pressure of the water main pipe P that does not pass through the depressurization type backflow prevention device 15, the first pressure increase circuit unit 16 and the bypass circuit unit. Since it is the structure detected on the secondary side of 17, the pressure loss on the suction side of the pump 23 can be prevented as much as possible. Thereby, the suction side pressure of the pump 23 can be secured, and unnecessary water cutoff can be avoided.

  In the water supply apparatus 1, the first pressure tank 18 and the second pressure tank 38 are provided on the secondary side of the first pressure increasing circuit unit 16 and the second pressure increasing circuit unit 36. Since it is arranged in the vicinity of the pressure detection devices 19 and 39, it is possible to buffer pressure fluctuations around the pressure detection devices 19 and 39. Thereby, since the pressure is stabilized, the pressure value detected by the pressure detectors 19 and 39 is also stabilized, and the first pressure increasing circuit unit 16 and the second pressure increasing circuit unit 36 are made stable by the stable pressure. It becomes possible to control.

  Further, the first accumulator 51, the second accumulator 52, and the third accumulator 53 have the same capacity, and are set in consideration of the height at which the sealed pressure value is arranged. On the other hand, the inflow and outflow amounts can be made substantially equal. Thereby, the 1st pressure increase water supply unit 10 and the 2nd pressure increase water supply unit 30 which were connected in series prevent the fluctuation | variation (pulsation) of each suction side pressure and discharge side pressure as much as possible, and can stabilize pressure. It becomes.

  As described above, according to the water supply device 1 of the present invention, the backflow prevention device 15 is provided on the secondary side of the first pressure increase circuit unit 16 and the bypass circuit unit 17, and the pressure sensor 19 is provided in the first pressure increase circuit unit 16. And by providing on the primary side of the bypass circuit part 17, it becomes possible to prevent the pressure loss of the suction side of the pump 23 as much as possible, and to avoid water cutoff as much as possible.

  The present invention is not limited to the above embodiment. In the example mentioned above, although the 2nd pressure increase water supply unit 30 demonstrated the structure which has the bypass circuit part 37 in the 2nd pump unit 32, it is not limited to this. For example, the 2nd pump unit 32 may be the structure which does not have the bypass circuit part 37, as shown to the 2nd pressure increase water supply unit 30A of the water supply apparatus 1 which concerns on the modification of this invention shown in FIG. .

  For example, when it is set as the structure which does not have the bypass circuit part 37, the pump 43 is formed so that the flow path of water can be ensured when the pump 43 stops. That is, the pump 43 may be configured such that water can pass when stopped, so that the second pressure-increasing circuit unit 36 that is stopped may be replaced with a bypass function. Thus, the second pressure-increasing water supply unit 30 </ b> A can be downsized by adopting a configuration that does not include the bypass circuit unit 37.

  Moreover, since it is the structure which provides the 2nd accumulator 52 and the 3rd accumulator 53 by the 1st accumulator 51, even if flow path resistance increases by setting it as the 2nd pressure increase water supply unit 30A which does not have a bypass circuit. It is possible to prevent the occurrence of pulsation and the like.

  Moreover, in the example mentioned above, although the 1st pressure increase water supply unit 10 and the 2nd pressure increase water supply unit 30 demonstrated the structure which provides the 1st pressure increase circuit part 16 and the 2nd pressure increase circuit part 36, respectively, this, It is not limited to. For example, each booster circuit unit 16.36 may be configured to have three or more systems. When three or more systems are provided, the flow rate sensors 20 and 40 are provided between the check valves 24 and 44 and the secondary side gate valves 22 and 42 of the check valves 24 and 44 in order to improve maintainability. It is desirable to provide each of the above.

  In the above-described example, the first pressure tank 18 and the second pressure tank 38 are the secondary side of the backflow prevention device 15, the primary side of the pressure detection device 19, and the second pressure increase circuit unit 36. Although an example of the secondary side and the primary side of the pressure detection device 39 has been described, the present invention is not limited to this. For example, the first pressure tank 18 and the second pressure tank 38 may be the secondary side of the first pressure increase circuit unit 16 and the second pressure increase circuit unit 36, even on the secondary side of the pressure detection devices 19 and 39. And it should just be the primary side of gate valves 21 and 41. That is, the first pressure tank 18 and the second pressure tank 38 may be disposed in the vicinity of the pressure detection devices 19 and 39.

  Furthermore, in the example mentioned above, although the structure which has the backflow prevention apparatus 35 in the 2nd pressure increase water supply unit 30 and 30A was demonstrated, it is not limited to this, The structure which does not have the backflow prevention apparatus 35 may be sufficient. In addition, various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Water supply apparatus, 5 ... Branch pipe, 6 ... Meter unit, 6a ... Meter groove, 6b ... Cover, 7 ... Piping, 10 ... Increase pressure water supply unit, 11 ... Water supply piping, 12 ... 1st pump unit, 13 ... Control Panel: 15 ... Backflow prevention device, 16 ... First pressure increasing circuit, 17 ... Bypass circuit, 18 ... First pressure tank, 19 ... Pressure sensor, 20 ... Flow rate sensor, 21 ... Gate valve, 22 ... Gate valve, DESCRIPTION OF SYMBOLS 23 ... Pump, 24 ... Check valve, 27 ... Check valve, 30, 30A ... 2nd pressure increase water supply unit, 31 ... Water supply piping, 32 ... 2nd pump unit, 33 ... Control panel, 35 ... Backflow prevention apparatus, 36: second pressure increasing circuit section, 37: bypass circuit section, 38: second pressure tank, 39: pressure sensor, 40: flow sensor, 41: gate valve, 42: gate valve, 43: pump, 44: check Valve, 51 ... first accumulator, 52 ... second accumulator Regulator, 53 ... third accumulator, G ... buildings, P ... water mains, S ... signal line, T ... water inlet.

Claims (8)

In the water supply device that supplies water to the building by increasing the pressure branched from the water main,
A plurality of first pressure-increasing circuit units and bypass circuit units that are provided in parallel and increase the pressure of water branched from the water main, and on the secondary side of the first pressure-increasing circuit unit and the bypass circuit unit A first pump unit having a depressurized backflow prevention device provided;
A plurality of second pressure-increasing circuit units connected in parallel for increasing the pressure of the water from the first pump unit, provided at a different level from the first pump unit, and on the secondary side of the first pump unit; A second pump unit connected in series to
A pressure sensor provided on a primary side of the first pressure-increasing circuit unit and the bypass circuit unit, and detecting a pressure of the branched water;
A control panel for controlling the operation and stop of the first pressure-increasing circuit unit according to the pressure of the branched water detected by the pressure sensor;
A water supply apparatus comprising:   The water supply device according to claim 1, wherein the second pump unit is disposed at a higher level than the first pump unit.   The water supply apparatus according to claim 1, wherein the second pump unit has a bypass circuit section. The second pump unit forms the flow path of the water when stopped,
2. The water supply device according to claim 1, further comprising a first accumulator provided on a primary side of the first pump unit and on the same level as the first pump unit. The second pump unit is
A second accumulator on the primary side and provided at the same level as the second pump unit;
The water supply apparatus according to claim 4, further comprising a third accumulator which is a secondary side of the second accumulator and is provided at the same level as the second pump unit.   The water supply device according to claim 1, wherein a plurality of the second pump units are connected in series to different levels.   5. The water supply according to claim 4, wherein the first pump unit includes a first pressure tank on a secondary side of the first pressure increasing circuit unit and on a primary side of the first accumulator. apparatus.   The water supply according to claim 7, wherein the second pump unit includes a second pressure tank on a secondary side of the second pressure increasing circuit unit and on a primary side of the third accumulator. apparatus.

Images