JP6522816B1 - Water supply device - Google Patents

Abstract

To provide a water supply device capable of detecting a water level with a simple configuration. A water supply apparatus (1) is connected to a pump apparatus (73) having a suction port connected to a water receiving tank (40) and equipped with a pump driven by a motor, and to the water receiving tank (40). A pressure sensor 43, a connecting pipe connected to the discharge port 86 of the pump, a second pressure sensor 87b provided on the connecting pipe and detecting the pressure on the secondary side of the pump, and the primary side of the pump or A flow rate sensor 87a provided on the secondary side, a storage unit 77a for storing measurement tolerance in the height direction from the mounting position of the first pressure sensor 43 to the bottom surface of the water receiving tank 40 in advance, and a second pressure sensor 87b. The motor 85 is controlled such that the detected pressure becomes the target pressure, and the control unit 77e detects the water level in the water receiving tank 40 from the first pressure sensor 43 and the measurement point tolerance. [Selected figure] Figure 1

Description

  The present invention relates to a water supply apparatus for supplying water stored in a water receiving tank.

  There is known a technology in which tap water is stored in a water receiving tank, and then the pump device is driven to supply the stored water to the secondary side using the stored tap water. Such a water supply apparatus is provided with a plurality of electrode rods for detecting the water level in the water receiving tank. For example, a plurality of electrode rods are electrodes that detect the drought level to stop the pump device judging that there is drought, electrodes that detect the drive permission water level to judge that the pump device can drive, and the water receiving tank is full. An electrode for detecting the full water level, an electrode for detecting the reduced water level where the water receiving tank is judged to be reducing water, two electrodes for opening and closing the inflow valve, and seven common electrodes are used. For this reason, in the case where two water receiving tanks are provided, the number of electrodes is 14, and adjustment of the length of the electrode bar and connection between the control panel and each electrode of the water receiving tank are required. Therefore, a technique is known in which the water level of the water receiving tank is detected by a highly sensitive pressure sensor provided on the suction side of the pump instead of the electrode rod to control the water level (see, for example, Patent Document 1).

Patent No. 5506347 gazette

  However, in the configuration in which the water level of the water receiving tank is detected by the pressure sensor, there is a problem that when the water supply amount increases, the suction pressure decreases and it is difficult to accurately detect the water level of the water receiving tank.

  Then, an object of this invention is to provide the water supply apparatus which can detect a water level by easy structure.

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

As one aspect of the present invention, a water supply apparatus is connected to a pump apparatus including a pump having a suction port connected to a water receiving tank and driven by a motor, and the water receiving water tank to detect hydrostatic pressure of the water receiving tank A pressure sensor, a connecting pipe connected to the discharge port of the pump, a second pressure sensor provided on the connecting pipe and detecting a pressure on the secondary side of the pump, and a primary side or a secondary side of the pump A flow rate sensor provided in the water intake tank, an inflow pipe connected to the water reception tank for supplying water to the water reception tank, the inflow valve for opening and closing the inflow pipe, and the attachment position of the first pressure sensor A storage unit for storing in advance a measurement point tolerance in the height direction up to the bottom surface of the water receiving tank; controlling the motor such that a pressure detected by the second pressure sensor becomes a target pressure; And from the station tolerance to the front And a control unit for detecting a water level in the water tank, and a notification unit for notifying the information to the outside, the said storage unit, said survey point tolerances and first set pressure determined from full water level of the water tank, From the station measurement tolerance and the second set pressure obtained from the water level lower than the full water level of the water receiving tank, the station measurement tolerance and the drought level of the water receiving tank at a water level lower than the water level serving as the second set pressure The third set pressure determined and the fifth set pressure determined from the water level lower than the station tolerance and the full water level and higher than the water level serving as the second set pressure are stored in advance, The control unit determines that the water receiving tank is at the full water level when the pressure detected by the first pressure sensor is equal to or higher than the first set pressure for a predetermined time, and the full water level is externally detected by the notification device. And the first pressure When the pressure detected by the sensor becomes the second set pressure, the motor can be driven, and the pressure detected by the first pressure sensor for a certain period of time is the third set pressure or less. It is determined that the water receiving tank is at the drought level, the driving of the motor is stopped, and the inflow valve is opened when the pressure detected by the first pressure sensor falls below the second set pressure. When the pressure detected by the second pressure sensor is higher than the fifth set pressure, the inflow valve is closed.

  According to the present invention, it is possible to provide a water supply device capable of detecting the water level with a simple configuration.

The side view which shows the structure of the water supply apparatus which concerns on one Embodiment of this invention in a partial cross section. The front view which shows the internal structure of the pump unit connected to the same water supply apparatus. The side view which shows the structure of the pump unit in a partial cross section. The top view which shows the structure of the pump unit.

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 a side view which shows the structure of the water supply apparatus 1 which concerns on one Embodiment of this invention by a partial cross section. FIG. 2 is a front view showing a state in which the cover of the pump unit 10 connected to the water supply device 1 is removed. FIG. 3 is a side view showing the configuration of the pump unit 10 in a partial cross section. FIG. 4 is a plan view showing the arrangement of piping provided in the pump unit 10. As shown in FIG.

  The water supply apparatus 1 is fixed on, for example, a building or an installation surface 101 adjacent to the building. The water supply apparatus 1 is disposed on a base 20 fixed to the installation surface 101, a mount 30 fixed on the base 20, a water receiving tank 40 fixed on the mount 30, and a side of the mount 30 A pump unit 10 and a first connecting pipe 50 for communicating the water receiving tank 40 with the pump unit 10 are provided.

  The base 20 is formed in a rectangular frame shape. The gantry 30 is provided on the base 20, and holds the water receiving tank 40 at a predetermined height from the installation surface 101 to the bottom surface 40a of the water receiving tank 40. Here, the predetermined height is a height greater than or equal to the height defined by the Building Standard Law, and specifically, it is set to 60 cm or more. The gantry 30 has four leg members 31 fixed to the four corners of the base 20, and a rectangular frame member 33 to which the upper ends of the leg members 31 are connected.

  The water receiving tank 40 is configured to be able to store water inside. In the present embodiment, two water receiving tanks 40 are provided, for example. In addition, although the water receiving tank 40 shows the example of a 2 tank type water receiving tank, the structure which provides only one water receiving tank 40 may be sufficient.

  The water receiving tank 40 is provided with a first pressure sensor 43 for detecting the hydrostatic pressure H in the water receiving tank 40, a bottom surface 40a, a drain pipe 45 having an open / close valve 45a, and a water main. It has the inflow piping 46 which it has, and the overflow piping 47.

  The first pressure sensor 43 is connected to the drain pipe 45, and is provided at a tip of the pipe 43a, a pipe 43a extended to the inside of the pump unit 10, a three-way valve 43b provided in the middle of the pipe 43a And a sensor unit 43c disposed in the pump unit 10 connected to the first port of the valve 43b. The sensor unit 43c is spaced apart from the bottom surface 40a of the water receiving tank 40 by a predetermined distance in the direction of gravity, for example, 65 cm below.

  The three-way valve 43 b is connected to a pipe 43 a in which the second port and the third port are connected to the drain pipes 45 of the two water receiving tanks 40 respectively.

  The pump unit 10 includes a case 71 fixed to the installation surface 101, a pair of pump devices 73 accommodated in the case 71, an accumulator 75, and a control panel 77. The pump unit 10 also has a suction pipe 51 and a discharge pipe 87.

  The case 71 includes a case main body 71 a and a cover 71 b attachable to and detachable from the case main body 71 a. The case 71 has a rainproof structure capable of preventing the infiltration of rainwater when installed outside. Further, the case 71 is configured to be able to arrange the plurality of pump devices 73 in one direction (width direction) which is long in the gravity direction and orthogonal to the gravity direction in the installed posture.

  The case main body 71a is configured by attaching a plate-like wall portion to a mount or a frame except for the front surface. The case main body 71a is configured to be able to accommodate the pair of pump devices 73, the accumulator 75, the control panel 77, and the sensor unit 43c inside. The cover 71b is configured to be attachable to and detachable from the case main body 71a, and for example, is configured to be able to open the front side of the case main body 71a.

  As shown in FIGS. 2 and 3, such a case 71 accommodates, for example, the control panel 77 above the case 71 and on one side in the width direction, and the sensor portion 43 c above the case 71. And is accommodated on the other side in the width direction.

  The pump device 73 is a multistage vertical pump device. The pump device 73 is, for example, a turbine pump. The pair of pump devices 73 are disposed adjacent to each other in the width direction of the case 71. The pair of pump devices 73 is fixed to the case main body 71a.

  The pump device 73 has a pump casing 82 having a suction port 81, a plurality of impellers 83, a rotary shaft 84 provided with the impellers 83, a motor 85 for rotating the rotary shaft 84, and a discharge port 86. ing. The suction port 81 is provided at the lower end of the pump casing 82.

  The suction pipe 51 is a branch pipe, extends in the horizontal direction, is bent 90 degrees toward the suction port 81 of each pump device 73, and is connected to the suction port 81. The suction pipe 51 is provided on the water receiving tank 40 side of the case main body 71 a and is connected to the first connection pipe 50. The suction pipe 51 is connected to the pump device 73 with the other end facing upward.

  The pump casing 82 has a suction port 81 provided at its lower end, a discharge port 86 provided at its upper end, and a plurality of pump chambers 82 a. The suction port 81 of the pump casing 82 is connected to one end of the suction pipe 51, and is fixed to the suction pipe 51.

  The discharge port 86 is provided on the outer peripheral surface of the pump casing 82, and is disposed on the front side of the case main body 71a. The discharge port 86 is connected to the discharge pipe 87.

  The discharge pipe 87 is formed of a bent pipe bent at 90 degrees, and extends in the direction of gravity. The discharge pipe 87 is integrally provided with a flow rate sensor 87a, a second pressure sensor 87b for detecting the pressure on the secondary side of the pump device 73, a check valve 87c, and a ball valve 87d in the middle. The flow rate sensor 87a is, for example, an impeller type flow rate sensor, and is configured to be able to detect the discharge flow rate from the pump device 73. Further, the plurality of discharge pipes 87 provided in each of the pump devices 73 are joined by the second connection pipe 60.

  The motor 85 is fixed on the pump casing 82. The motor 85 rotates the rotating shaft 84.

  The accumulator 75 is provided on the secondary side of the pair of pump devices 73 and in the middle of the second connection pipe 60. The accumulator 75 is formed in a size that can be accommodated in the case main body 71 a in a state where the cover 71 b is attached to the case main body 71 a.

  The second connection pipe 60 is a joining pipe for joining the discharge pipes 87, and is extended in the horizontal direction. The second connection pipe 60 is connected to the water supply destination of the building via a pipe or the like.

  The control panel 77 includes a storage unit 77a, a display unit 77b, a notification device 77c, an input unit 77d, and a control unit 77e. The control panel 77 is fixed to the case main body 71a.

  The storage unit 77a stores information obtained from various sensors. In addition, the storage unit 77a stores information necessary for water level detection in advance. Specifically, the storage unit 77a stores in advance a measurement tolerance as a position at which the bottom surface 40a of the water receiving tank 40 is measured. Here, the measurement point tolerance is the height in the direction of gravity from the mounting position of the sensor portion 43c of the first pressure sensor 43 to the bottom surface 40a of the water receiving tank 40, and is 65 cm in this embodiment. In addition, the storage unit 77a stores the first set pressure, the second set pressure, the third set pressure, the fourth set pressure, and the fifth set pressure.

  As a specific example, the storage unit 77a fills the first set pressure with the full pressure, the second set pressure with the ON pressure, the third set pressure with the drought pressure, the fourth set pressure with the reduction pressure, and the fifth set pressure with the inflow valve closing pressure. And the table is stored.

  The first set pressure is a static pressure detected by the sensor unit 43c when the water level of the water receiving tank 40 is at the full water level J, and is obtained from the measurement point tolerance and the full water level J of the water receiving tank 40. As a specific example, the first set pressure is a pressure detected at a water level of 163 cm when the full water level J is 98 cm and the measurement tolerance is 65 cm.

  The second set pressure is a pressure when the water level of the water receiving tank 40 is lower than the full water level J and is at the ON water level L for driving the motor 85. The second set pressure is obtained from the station tolerance and the ON water level L. As a specific example, when the ON water level L is 68 cm and the measurement tolerance is 65 cm, the second set pressure is a pressure detected at a water level of 133 cm.

  The third set pressure is the pressure when the water level of the water receiving tank 40 is at the drought level N lower than the ON level. The third set pressure is obtained from the station tolerance and the drought level N. As a specific example, the third set pressure is a pressure detected at a water level of 85 cm when the drought water level N is 20 cm and the measurement tolerance is 65 cm.

  The fourth set pressure is a pressure when the water level of the water receiving tank 40 is lower than the ON water level L and is at the reduced water level M higher than the drought water level N. The fourth set pressure is obtained from the station tolerance and the reduced water level M of the water receiving tank 40. As a specific example, the fourth set pressure is a pressure detected at a water level of 105 cm when the water reduction level M is 40 cm and the measurement tolerance is 65 cm.

  The fifth set pressure is a pressure at which the water level of the water receiving tank 40 is lower than the full water level J and higher than the ON water level L and at an inflow valve closed water level K closing the inflow valve 46a. The fifth set pressure is obtained from the station tolerance and the inflow valve closing water level K. As a specific example, the fifth set pressure is a pressure detected at a water level of 153 cm when the inflow valve closed water level K is 88 cm and the measurement tolerance is 65 cm.

  That is, as shown in FIG. 1, for example, the water level in the water receiving tank 40 is set to the full water level J, the inflow valve closed water level K, the ON water level L, the reduced water level M, and the drought level N. Here, the full water level J is the level at which the water level in the water receiving tank 40 is the highest. The inflow valve closed water level K is a water level lower than the full water level J, and is a water level at which the controller 77 e closes the inflow valve 46 a and stops the supply of new water into the water receiving tank 40. The ON water level L is a water level which is below the full water level J and the inflow valve closed water level K and can start driving of the motor 85. The reduced water level M is a water level lower than the full water level J, the inflow valve closed water level K, and the ON water level L, and is a water level that reports to the outside that the water level in the water receiving tank 40 is reduced. The drought water level N is a water level lower than the full water level J, the inflow valve closed water level K, the ON water level L and the reduced water level M, and informs the outside that the water receiving tank 40 is in a drought state. It is the water level that stops

  The display unit 77 b is configured to be able to display information and the like of the detected water level of the water receiving tank 40. The notification device 77c is a notification device capable of emitting an alarm by sound or light. The input unit 77 d is configured to be able to input a measurement tolerance obtained from the installation situation of the water receiving tank 40 and the sensor unit 43 c.

  The control unit 77e is electrically connected to the motor 85, the first pressure sensor 43, the second pressure sensor 87b, the storage unit 77a, the display unit 77b, the notification device 77c, and the input unit 77d via signal lines.

  The controller 77e performs constant target pressure control for controlling the frequency of the motor 85 such that the pressure detected by the second pressure sensor 87b becomes the target pressure. The control unit 77e controls the driving of the pump device 73, the opening and closing of the inflow valve 46a, the display of the display unit 77b, and the alarm by the notification device 77c.

  The control unit 77 e is configured to be able to detect the water level in the water receiving tank 40 from the static pressure detected by the first pressure sensor 43 and the measuring point tolerance stored in the storage unit 77 a.

  Specifically, when the pressure detected by the first pressure sensor 43 is equal to or higher than the first set pressure for a predetermined time, the control unit 77e determines that the water receiving tank 40 is at the full water level J. In addition, the display unit 77 b and the notification device 77 c notify the outside that the water receiving tank 40 is at the full water level J.

  Also. When the pressure detected by the first pressure sensor 43 becomes the second set pressure, the controller 77 e enables the motor 85 to be driven, and the pressure detected by the first pressure sensor 43 for a certain period of time is the third set pressure. In the following cases, it is determined that the water receiving tank 40 is at the drought water level N, and the drive of the motor 85 is stopped.

  Further, when the pressure detected by the first pressure sensor 43 is equal to or lower than the fourth set pressure for a certain period of time, the control unit 77e determines that the water receiving tank 40 is at the water reduction water level M, and the water reduction water level is detected by the notification device 77c. In addition to informing M to the outside, when the pressure detected by the first pressure sensor 43 is equal to or less than the third set pressure for a predetermined time, the informing device 77 c notifies the drought level N to the outside. When the pressure detected by the first pressure sensor 43 falls below the second set pressure, the controller 77 e opens the inflow valve 46 a and the pressure detected by the first pressure sensor 43 is higher than the fifth set pressure. Close the inflow valve 46a.

  Next, an example of water supply control of the water supply apparatus 1 will be described.

  First, the control unit 77e detects the hydrostatic pressure H of the water receiving tank 40 by the first pressure sensor 43, and compares the detected hydrostatic pressure H with a plurality of set pressure values stored in the storage unit 77a in advance. The water level of the water receiving tank 40 is detected.

  As a specific example, when the hydrostatic pressure H is equal to or higher than the first set pressure for a certain time, the control unit 77e determines that the water level in the water receiving tank 40 is at the full water level J, and the water receiving tank 40 is full. While displaying certain information on the display unit 77b, an alarm is issued by the notification device 77c.

  When the hydrostatic pressure H is equal to or higher than the second set pressure for a predetermined time, the control unit 77e determines that the water level in the water receiving tank 40 is at the ON pressure water level L, and drives the motor 85 to generate the second pressure. Based on the pressure detected by the sensor 87b, the drive frequency of the motor 85 is controlled in order to control the pump device 73 at a target pressure. Thus, the water in the water receiving tank 40 is supplied to the water supply destination.

  When the hydrostatic pressure H is equal to or higher than the second set pressure and equal to or higher than the fifth set pressure for a certain period of time, the controller 77e determines that the water level of the water receiving tank 40 is the inflow valve closed water level K. Judge and close the inflow valve 46a. Further, in the case where the hydrostatic pressure H is equal to or less than the second set pressure for a predetermined time, and the inflow valve 46a is closed, the control unit 77e opens the inflow valve 46a and Supply water.

  By supplying the water of the water receiving tank 40 to the water supply destination, the water level in the water receiving tank 40 is lowered, and when the hydrostatic pressure H becomes equal to or less than the fourth set pressure for a predetermined time, the control unit 77e receives the water receiving tank. The water level of 40 is determined to be the water reduction level M, and information indicating that the water receiving tank 40 is water reduction is displayed on the display unit 77b, and an alarm is issued by the notification device 77c.

  When the water level further decreases and the hydrostatic pressure H is less than or equal to the third set pressure for a certain period of time, the control unit 77e determines that the water level of the water receiving tank 40 is at the drought water level N and stops the motor 85. At the same time, the information that the water receiving tank 40 is drought is displayed on the display unit 77b, and an alarm is issued by the notification device 77c.

  The water supply device 1 of the present embodiment having such a configuration is based on the static pressure detected by the first pressure sensor 43 and the measurement tolerance obtained from the distance from the sensor portion 43c of the pressure sensor 43 to the bottom surface 40a of the water receiving tank 40. It is possible to detect the water level. As a result, the water supply apparatus 1 can detect the water level with a simple configuration.

  Specifically, instead of the electrode, the water supply apparatus 1 of this embodiment has the first pressure sensor 43 attached to the water receiving tank 40, and the detected hydrostatic pressure H and the measurement tolerance and the water level stored in advance in the storage unit 77a. It is possible to detect whether the water level in the water receiving tank 40 is at the full water level J, the inflow valve closed water level K, the ON water level L, the reduced water level M or the drought water level N by using the set pressure value in .

  Moreover, the water supply apparatus 1 of this embodiment has connected the piping connected to the 1st pressure sensor 43, and the two water receiving tanks 40 by the three-way valve 43b. For this reason, since any of the water receiving tanks 40 and the first pressure sensor 43 can be connected by a simple operation of switching the three-way valve 43b, the water level of one of the water receiving tanks 40 can be selectively detected.

  Further, the first pressure sensor 43 has a configuration in which the sensor portion 43c is disposed in the case 71 of the pump unit 10, and is configured to be connected to the water receiving tank 40 via the pipe 43a. Therefore, even if the water supply apparatus 1 is installed outdoors, the sensor unit 43c is accommodated in the case 71, and thus is not exposed to wind and rain, and is accommodated together with the control panel 77 in the case 71. . For this reason, the sensor unit 43c does not come in contact with rainwater, and can prevent a failure due to water immersion to the inside, and a distance with the control panel 77 does not become long, and a malfunction due to a decrease in sensor voltage and external noise is prevented. it can.

  As described above, according to the water supply apparatus 1 according to the embodiment of the present invention, the water pressure of the water receiving tank 40 can be detected with a simple configuration to obtain the static pressure in the water receiving tank 40 by the first pressure sensor 43.

  In addition, this invention is not limited to the above-mentioned embodiment. In the above-described example, when the hydrostatic pressure H is the water reduction pressure, the control unit 77 e displays the information that the water receiving tank 40 is the water reduction on the display unit 77 b, and describes the configuration to issue an alarm by the notification device 77 c. However, for example, it may be configured to display only on the display unit 77b and not to issue an alarm, and even when other pressures (water levels) are met, display and alarm of information can be set appropriately.

  Moreover, although the water supply apparatus 1 demonstrated the structure provided with the two water receiving tanks 40 in the example mentioned above, it is not limited to this, For example, you may be a structure provided with only one water receiving tank 40. FIG. In the above-described example, the water level of the water receiving tank 40 is determined from the static pressure of the water receiving tank 40 detected by the first pressure sensor 43. However, the present invention is not limited thereto. In addition to the structure which calculates | requires the water level of this, it is good also as a structure which can also calculate the water level of the water receiving tank 40 also with an electrode and an electrode circuit.

As described above, the present invention is not limited to the above embodiment. That is, the present invention is not limited to the above embodiment, and can be variously modified in the implementation stage without departing from the scope of the invention. In addition, the embodiments may be implemented in combination as appropriate, in which case the combined effect is obtained. Furthermore, various inventions are included in the above-described embodiment, and various inventions can be extracted by a combination selected from a plurality of disclosed configuration requirements. For example, even if some configuration requirements are deleted from all the configuration requirements shown in the embodiment, the problem can be solved, and if an effect is obtained, a configuration from which this configuration requirement is removed can be extracted as the invention.
In the following, a description equivalent to the invention described in the original claims of the present application is appended.
[1] A pump device comprising a pump whose suction port is connected to a water receiving tank and driven by a motor,
A first pressure sensor connected to the water receiving tank and detecting hydrostatic pressure of the water receiving tank;
A connecting pipe connected to the outlet of the pump;
A second pressure sensor provided in the connection pipe for detecting the pressure on the secondary side of the pump;
A flow rate sensor provided on the primary side or secondary side of the pump;
A storage unit which stores in advance a measurement tolerance in a height direction from the mounting position of the first pressure sensor to the bottom surface of the water receiving tank;
A control unit configured to control the motor such that a pressure detected by the second pressure sensor becomes a target pressure, and detecting a water level in the water receiving tank from the first pressure sensor and the measurement point tolerance;
Water supply equipment provided with.
[2] A notification device for notifying information to the outside is provided.
The storage unit stores in advance a first set pressure obtained from the measurement point tolerance and the full water level of the water receiving tank,
The control unit determines that the water receiving tank is at the full water level when the pressure detected by the first pressure sensor is equal to or higher than the first set pressure for a certain period of time, and the notification device uses the full water level. The water supply apparatus as described in [1] which alert | reports outside.
[3] The storage unit is more than a second set pressure obtained from the measurement point tolerance and the water level lower than the full water level of the water receiving tank, and a water level serving as the measurement point tolerance and the second set pressure Pre-store the third set pressure obtained from the drought level of the low water receiving tank;
The control unit enables the motor to be driven when the pressure detected by the first pressure sensor becomes the second set pressure, and the pressure detected by the first pressure sensor for a predetermined time is the third pressure. The water supply apparatus according to [2], wherein when the pressure is equal to or less than a set pressure, it is determined that the water receiving tank is at the drought level, and driving of the motor is stopped.
[4] The storage unit is obtained from the water reduction water level of the water receiving tank at a water level lower than the measurement point tolerance and the second set pressure and higher than the third set pressure. Pre-store the fourth set pressure,
When the pressure detected by the first pressure sensor is equal to or less than the fourth set pressure for a certain period of time, the control unit determines that the water receiving tank is at the water reduction level, and the water level is determined by the notification device. The water supply according to [3], wherein when the pressure detected by the first pressure sensor is equal to or less than the third set pressure for a predetermined time while notifying the outside, the water level is notified to the outside by the notification device. apparatus.
[5] An inflow pipe connected to the water reception tank for supplying water to the water reception tank, the inflow valve opening and closing the inflow pipe,
The storage unit stores in advance a fifth set pressure obtained from a water level lower than the station tolerance and the full water level and higher than the water level to be the second set pressure,
The control unit opens the inflow valve when the pressure detected by the first pressure sensor falls below the second set pressure, and the pressure detected by the second pressure sensor is lower than the fifth set pressure. The water supply device according to [3] or [4], which closes the inflow valve when high.
[6] the water receiving tank
The water supply apparatus according to any one of [1] to [5], further comprising: a pipe connecting the water receiving tank and the first pressure sensor.
[7] The water receiving tank is provided with two tanks,
The water supply apparatus according to [6], further comprising a three-way valve connecting the two water receiving tanks and the pipe.

  DESCRIPTION OF SYMBOLS 1 ... Water supply apparatus, 10 ... Pump unit, 20 ... Base, 30 ... Mounting frame, 31 ... Leg member, 33 ... Frame member, 40 ... Water receiving tank, 40a ... Bottom face, 43 ... 1st pressure sensor, 43a ... Piping, 43b ... Three-way valve, 43c: sensor unit, 45: drain pipe, 45a: on-off valve, 46: inflow pipe, 46a: inflow valve, 47: overflow pipe, 50: first connection pipe, 51: suction pipe, 60: second connection Tube 71: Case 71a Case body 71b Cover 73 Pumping device 75 Accumulator 77 Control panel 77a Storage section 77b Display section 77c Notification apparatus 77d Input section 77e ... control section 81 suction port 82 pump casing 82a pump chamber 83 impeller 84 rotary shaft 85 motor 86 discharge port 87 discharge pipe 87a flow sensor 8 b ... second pressure sensor, 87c ... non-return valve, 87d ... ball valve, 101 ... installation surface

Claims (4)

A pump device comprising a pump whose suction port is connected to a water receiving tank and driven by a motor;
A first pressure sensor connected to the water receiving tank and detecting hydrostatic pressure of the water receiving tank;
A connecting pipe connected to the outlet of the pump;
A second pressure sensor provided in the connection pipe for detecting the pressure on the secondary side of the pump;
A flow rate sensor provided on the primary side or secondary side of the pump;
An inflow valve connected to the water receiving tank for supplying water to the water receiving tank, the inflow valve opening and closing the inflow pipe;
A storage unit which stores in advance a measurement tolerance in a height direction from the mounting position of the first pressure sensor to the bottom surface of the water receiving tank;
A control unit configured to control the motor such that a pressure detected by the second pressure sensor becomes a target pressure, and detecting a water level in the water receiving tank from the first pressure sensor and the measurement point tolerance;
A notification device for notifying information to the outside;
Equipped with
The storage unit is a first set pressure determined from the station tolerance and the full water level of the water receiving tank, a second preset pressure determined from the station tolerance and a water level lower than the full water level of the water reservoir, A third set pressure obtained from the drought level of the water receiving tank having a water level lower than the station tolerance and the water level serving as the second set pressure, and lower than the station tolerance and the full water level, and The fifth set pressure obtained from the water level higher than the water level to be the second set pressure is stored in advance,
The control unit determines that the water receiving tank is at the full water level when the pressure detected by the first pressure sensor is equal to or higher than the first set pressure for a certain period of time, and the notification device uses the full water level. When the pressure detected by the first pressure sensor becomes the second set pressure, the motor can be driven, and the pressure detected by the first pressure sensor for a certain period of time is the third pressure. When the pressure is lower than the set pressure, it is determined that the water receiving tank is at the drought level, the driving of the motor is stopped, and the pressure detected by the first pressure sensor is reduced to the second set pressure or less The water supply apparatus according to claim 1, wherein the inflow valve is opened and the inflow valve is closed when a pressure detected by the second pressure sensor is higher than the fifth set pressure . The storage unit is a fourth setting obtained from the water reduction water level of the water receiving tank at a water level lower than the station tolerance and the second set pressure and higher than the third set pressure. Pre-store pressure,
When the pressure detected by the first pressure sensor is equal to or less than the fourth set pressure for a certain period of time, the control unit determines that the water receiving tank is at the water reduction level, and the water level is determined by the notification device. The water supply according to claim 1 , wherein when the pressure detected by the first pressure sensor is equal to or less than the third set pressure for a predetermined time while notifying to the outside, the water level is notified to the outside by the notification device. apparatus. The water receiving tank,
The water supply apparatus according to claim 1, further comprising: a pipe that connects the water receiving tank and the first pressure sensor. The water receiving tank is provided with two tanks,
The water supply apparatus according to claim 3 , further comprising a three-way valve connecting the two water receiving tanks and the pipe.