JP5841775B2 - Water supply equipment - Google Patents

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). Such a water supply apparatus can directly supply water from a water main to a higher floor by connecting a pressure increasing water supply unit in series.

JP 2008-223269 A

  The water supply apparatus described above has the following problems. That is, since the water supply apparatus mentioned above uses several pressure increase water supply units, a manufacturing cost becomes high and an inexpensive thing is calculated | required. In addition, since a plurality of pressure-increasing water supply units are connected in series, when some of the pressure-increasing water supply units are stopped due to maintenance, water is not supplied to the secondary side of the stopped pressure-increasing water supply units, Will be. For this reason, there is also a demand for a water supply device that can avoid water shut-off even when some of the pressurized water supply units are maintained.

  Further, when the pressure-increasing water supply unit is provided in series, it is necessary to install the pressure-increasing water supply unit in the upper building, and therefore, the pressure-increasing water supply unit must be downsized.

  Then, this invention aims at providing the water supply apparatus which can be reduced in size and 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 plurality of first pump units having a plurality of first pressure-increasing circuit units and bypass circuit units, and a plurality of the plurality of pumps in parallel capable of increasing the pressure of water from the first pump unit and forming the water flow path when stopped. A second pump unit having a second pressure-increasing circuit portion provided, provided at a different level from the first pump unit, and connected in series to the secondary side of the first pump unit ; The second pump unit is disposed at a higher level than the first pump unit, and includes a first accumulator provided on the secondary side of the first pump unit and at the same level as the first pump unit. The second pump unit is a primary side of the second pump unit, a second accumulator provided at the same level as the second pump unit, a secondary side of the second pump unit, and the second pump unit. A third accumulator provided at the same level as the pump unit .
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 plurality of first pump units having a plurality of first pressure-increasing circuit units and bypass circuit units, and a plurality of the plurality of pumps in parallel capable of increasing the pressure of water from the first pump unit and forming the water flow path when stopped. A second pump unit having a second pressure-increasing circuit portion provided, provided at a different level from the first pump unit, and connected in series to the secondary side of the first pump unit; The second pump unit is disposed at a higher level than the first pump unit, and includes a first accumulator provided on the secondary side of the first pump unit and at the same level as the first pump unit. Provided La, the first pump unit is a secondary side of the first increase pressure circuit portion, and comprises a first pressure tank to the primary side of the first accumulator.

  According to the present invention, it is possible to provide a water supply apparatus that can be miniaturized and that can avoid water interruption 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 plurality of first pressure-increasing circuit portions 16 provided in parallel by branching backflow prevention devices 15 provided in the piping 7 and secondary-side piping 7 of the backflow prevention devices 15. A bypass circuit unit 17 and a first pressure tank 18 provided in the secondary side water supply pipe 11 where the first pressure increasing circuit unit 16 and the bypass circuit unit 17 have joined are provided.

  The first pump unit 12 includes a pressure sensor 19 provided on the primary side of the backflow prevention device 15 and the secondary side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17, and a first pressure tank 18. A flow rate sensor 20 provided on the secondary side, and a pressure sensor 19 and a gate valve 21 provided on the secondary side of the flow rate sensor 20 for manually opening and closing are provided. 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 a secondary side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17 and a primary side of the gate valve 21, and is a second side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17. It is provided in the vicinity of the pressure sensor 19 on the next side. In the present embodiment, the first pressure tank 18 is disposed 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 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 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 second pressure tank 38 provided in the secondary side water supply pipe 31 where the second pressure increasing circuit section 36 has joined. The second pump unit 32 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 second pressure tank 38. 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.

  Each of the pressure sensors 39 is connected to the control panel 33 and is configured to be able to detect the pressure on the primary side and the secondary side of the second pressure increasing circuit unit 36 and to transmit the detected information to the control panel 33. Yes.

  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 to transmit the detected information to the control panel 33.

The control panel 33 includes an inverter and performs alternate operation control by the plurality of second 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.

  When the water supply apparatus 1 is driven, the water supply apparatus 1 configured in this way drives the motors by the control panels 13 and 33 to operate the pumps 23 and 43, thereby supplying water branched from the water main P It becomes possible to supply to the water supply ports T of the floors FL, FM, FH.

  Specifically, first, the first pressure-increasing water supply unit 10 uses the pump 23 provided in the first pump unit 12 to supply water supplied from the branch pipe 5 to the supply destination water supply port T and the secondary side first water supply unit T. The water pressure is increased to the water pressure necessary to supply to each of the floors FL and FM provided with the two pressure-increasing water supply units 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 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 supplies the water supplied from the first pressure-increasing water supply unit 10 by the pump 43 provided in the second pump unit 32 to the water supply port T as the supply destination and the second side increase in the secondary side. The water pressure is increased to the water pressure required to supply to each level where the pressurized water supply unit 30 is provided 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.

  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 becomes a simple structure by making it the structure which does not provide a bypass circuit part in the pressure increase water supply unit after the 2nd unit, ie, the 2nd pressure increase water supply unit 30, and size reduction of the water supply apparatus 1 In addition, the manufacturing cost can be reduced.

  In addition, since the bypass circuit unit has a check valve or the like and is a component that may cause a malfunction such as a failure, the second pressure increasing water supply unit 30 is configured not to include the bypass circuit unit. Thus, the occurrence of maintenance (failure) can be reduced, the possibility of water breakage can be reduced, and the reliability can be improved.

  In addition, the second pressure increasing water supply unit 30 is configured not to have a bypass pipe, but since the flow path of water is formed in the pump 43, the inside of the stopped second pressure increasing circuit unit 36 is Becomes a flow path, and the bypass function can be substituted.

  In addition, there exists a possibility that flow-path resistance may increase by using the 2nd pressure | voltage rise circuit part 36 which has stopped as a bypass circuit part. However, the water supply apparatus 1 is provided with the second pressure tank 38 on the secondary side of the second pressure increase circuit unit 36 and on the primary side of the pressure sensor 39 and the flow rate sensor 40, and the second pressure increase water supply unit 30. The second accumulator 52 and the third accumulator 53 are provided in the same level on the primary side and the secondary side. For this reason, even if water supply from the water supply port T, variability of the pump 23, and pulsation due to an increase in flow path resistance occur, the pressure is increased by the second pressure tank 38 and the second and third accumulators 52 and 53. It becomes possible to stabilize.

  In particular, the pressure sensor 39 for controlling the operation of the pump 23 is provided on the secondary side of the second accumulator 52, on the primary side of the third accumulator 53, and on the secondary side of the second pressure tank 38. Therefore, the pressure detected by the pressure sensor 39 is less affected by pulsation and the like, and a stable pressure is detected. For this reason, the water supply apparatus 1 can control the pump 43 stably.

  Further, unlike the first pump unit 32, the second pump unit 32 has a configuration that does not have a bypass circuit portion, so that the loss head is increased and the pressure of the discharge portion (secondary side) of the second pump unit 32 is increased. The pressure applied by the pump 43 when the pressure decreases increases.

  As the pressure applied by the pump 43 increases, the pressure at the discharge part (secondary side) of the first pump unit 32 decreases, causing a pressure fluctuation. However, by providing the first accumulator 51 on the secondary side of the first pressure-increasing water supply unit 10 and at the same level, the pressure fluctuation is prevented (buffered) and the pressure in the water supply pipe 11 is reduced. By stabilizing, it becomes possible to supply stable water with little pressure fluctuation.

  Further, the first pressure increasing circuit section 16 and the second pressure increasing circuit section 36 are provided with gate valves 22 for manually opening and closing the primary and secondary sides of the pumps 23 and 43 and the check valves 24 and 44, respectively. Thus, even if a part of the plurality of first pressure increase circuit units 16 and the second pressure increase circuit unit 36 is stopped and maintained, the other first pressure increase circuit units 16 and the second pressure increase circuit units 36 are operated. It becomes possible to make it. For this reason, even at the time of maintenance, it becomes possible to supply water to the secondary side by the first pump unit 12 and the second pump unit 32 without causing the water to stop.

  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 second pressure-increasing water supply unit 30 is not provided with a bypass circuit, only the plurality of second pressure-increasing circuit portions 36 are provided, By adopting the accumulators 51, 52, and 53, it is possible to reduce the size and to avoid water cut as much as possible.

  The present invention is not limited to the above embodiment. In the above-described example, the first pressure increase water supply unit 10 and the second pressure increase water supply unit 30 have been described with the configuration in which the first pressure increase circuit unit 16 and the second pressure increase circuit unit 36 are provided in two systems, but the present invention is not limited thereto. Not. 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 have a configuration provided in

  Moreover, although the 1st pressure increase water supply unit 10 demonstrated the structure which provides the 1st pressure tank 18 in the secondary side of the 1st pressure increase circuit part 16 and the bypass circuit part 17 in the example mentioned above, it is not limited to this. . For example, a first pressure tank 18 is further provided on the primary side of the first pressure increasing circuit unit 16 and the bypass circuit unit 17 as shown in the first pressure increasing water supply unit 10A according to the modification of the present embodiment shown in FIG. It may be a configuration.

Further, in the above-described example, the first pressure tank 18 and the second pressure tank 38 are secondary sides of the first pressure increase circuit unit 16 and the second pressure increase circuit unit 36, and the pressure detection devices 19 and 39. Although the example of the primary side was described, it 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. In addition, various modifications can be made without departing from the scope of the present invention.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] In a water supply device that supplies water to a building by increasing the pressure of water branched from the water main,
A first pump unit having a plurality of first pressure-increasing circuit portions and bypass circuit portions, which are provided in parallel and increase the pressure of water branched from the water main;
It has a plurality of second pressure-increasing circuit portions provided in parallel that can increase the pressure of water from the first pump unit and form the water flow path when the water is stopped, and is different from the first pump unit. A second pump unit provided in a hierarchy and connected in series to the secondary side of the first pump unit;
A water supply apparatus comprising:
[2] The second pump unit is arranged at a higher level than the first pump unit,
The water supply apparatus according to [1], further including a first accumulator provided on the secondary side of the first pump unit and at the same level as the first pump unit.
[3] The second pump unit includes:
A second accumulator on the primary side and provided at the same level as the second pump unit;
The water supply apparatus according to [2], further comprising a third accumulator provided on the same level as the second pump unit.
[4]
The water supply device according to [1], wherein a plurality of the second pump units are connected in series to different levels.
[5] In the above [2], the first pump unit includes a first pressure tank on the secondary side of the first pressure increasing circuit unit and on the primary side of the first accumulator. Water supply apparatus of description.
[6] In the above [3], the second pump unit includes a second pressure tank on the secondary side of the second pressure increasing circuit section and on the primary side of the third accumulator. Water supply apparatus of description.

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

Claims (5)

In the water supply device that supplies water to the building by increasing the pressure branched from the water main,
A first pump unit having a plurality of first pressure-increasing circuit portions and bypass circuit portions, which are provided in parallel and increase the pressure of water branched from the water main;
It has a plurality of second pressure-increasing circuit portions provided in parallel that can increase the pressure of water from the first pump unit and form the water flow path when the water is stopped, and is different from the first pump unit. A second pump unit provided in a hierarchy and connected in series to the secondary side of the first pump unit;
Equipped with a,
The second pump unit is arranged at a higher level than the first pump unit,
A first accumulator provided on the secondary side of the first pump unit and at the same level as the first pump unit;
The second pump unit is a primary side of the second pump unit and a second accumulator provided on the same level as the second pump unit, and a secondary side of the second pump unit, and is the same as the second pump unit. A water supply apparatus comprising: a third accumulator provided in a hierarchy .   The water supply device according to claim 1, wherein a plurality of the second pump units are connected in series to different levels. 2. The water supply according to claim 1 , wherein the first pump unit includes a first pressure tank on a secondary side of the first pressure increasing circuit section and on a primary side of the first accumulator. apparatus. 2. The water supply according to claim 1 , 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.   In the water supply device that supplies water to the building by increasing the pressure branched from the water main,
  A first pump unit having a plurality of first pressure-increasing circuit portions and bypass circuit portions, which are provided in parallel and increase the pressure of water branched from the water main;
  It has a plurality of second pressure-increasing circuit portions provided in parallel that can increase the pressure of water from the first pump unit and form the water flow path when the water is stopped, and is different from the first pump unit. A second pump unit provided in a hierarchy and connected in series to the secondary side of the first pump unit;
  With
  The second pump unit is arranged at a higher level than the first pump unit,
  A first accumulator provided on the secondary side of the first pump unit and at the same level as the first pump unit;
  The water supply device, 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.

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