JP2013174138A - Well water usage measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a well water usage measuring apparatus capable of accurately computing the usage of well water by measuring the operating time of a pumping motor in a measuring means that measures the usage of well water by installing a measuring instrument for each storage pump and charges a sewerage rate corresponding to the water usage.SOLUTION: A well water usage measuring apparatus includes an energization detecting part 3 that can clamp an electric wire 7; a time recording part 4 having an hour meter; and a water usage computing part 5. The energization detecting part 3 has an endless core 32 separated to be openable/closable in part and wound with a coil, and includes an operation control part for generating an induction current in the coil when a current flows into the electric wire arranged in the endless core 32, and controlling the operation of the hour meter using the induction current when the current flowing in the electric wire is a current of a threshold value or more. The time recording part 4 integrates the operating time of the storage pump 2 by the operation of the hour meter, and the water usage computing part 5 computes the usage of well water on the basis of the operating time of the storage pump 2 integrated by the time recording part 4.

Description

  The present invention relates to a well water usage measuring device that measures the amount of well water used according to the operating time of a pump when using well water.

  Conventionally, sewerage charges for households that use well water are that sewerage-related companies, etc., individually install measuring instruments for pumps to measure the amount of well water used, and charge the sewerage charges according to the amount of water used. In order to measure the amount of water used, it is customary to install an integrated flow meter that measures the integrated flow rate of well water at the pump discharge port, or a flow sensor that detects the amount of pumped water in the pump. It is necessary to use a pump capable of storing the accumulated flow rate based on the detected information (for example, see Patent Document 1). For this reason, in order to measure the amount of water used in the manner described above, it is necessary to attach an integrating flow meter to the pump discharge port, and it is necessary to provide a special pump as in the invention described in Patent Document 1. is there. However, when an integrated flow meter is attached to the pump discharge port, it is necessary to prepare an integrated flow meter suitable for each pump discharge port. In the invention described in Patent Document 1, it is necessary to provide a special pump. In both cases, the cost was high.

  Moreover, what is shown in FIGS. 3-5 is known as a conventional well water usage measuring device.

First, the structure of a pressure tank type pump that is generally widely used will be described with reference to FIG.
The pump 20 is connected to the well through the pipe 18, and pumps the well water into the pressure tank 15 by the rotation of the pump motor 21 that pumps the well water from the well.

  The pressure tank 15 is filled with a predetermined amount of air, and the well water compressed and sent by the pumping motor 21 compresses the air contained in the pressure tank 15, so that the discharge sent out from the discharge port 17. Pressure can be secured.

  The pressure switch 8 provided in the upper part of the pressure tank 15 is interposed on a wiring between a power supply (not shown) and the pumping motor 21 here, and can control energization of the pumping motor 21.

When water is not sent out from the discharge port 17, that is, when well water is not used by the user, the pressure in the pressure tank 15 rises, and when this pressure exceeds a certain level, the pressure switch 8 is connected to the pumping motor 21. Turn off the power and stop the pumping motor.
When well water is used by the user and water is sent out from the discharge port 17, the pressure in the pressure tank 15 decreases, and the pressure switch 8 energizes the pumping motor 21 to increase the pressure in the pressure tank 15. It is a mechanism to let you.

  The conventional pressure tank type pump 20 has a structure in which the discharge pressure is adjusted by energizing and shutting off the pumping motor 21 by the pressure switch 8 described above. As will be described later, the discharge pressure is adjusted by inverter control. There is also a structured pump. In addition, the structure of the pump by this inverter control does not have a big difference except whether a pumping motor respond | corresponds to inverter control. Furthermore, the structure of the pressure tank type pump mentioned above is only an example, and it goes without saying that the structure of the pump using the pressure tank is various.

FIG. 4 is a block diagram showing a state in which the amount of well water used is measured using conventional measuring means for a pumping pump 20 that adjusts the discharge pressure using the conventional pressure switch 8.
The pumping motor 21 of the pumping pump 20 is driven by an alternating current having a rated frequency and voltage (for example, 100 V, 50 Hz) supplied from a household power source.

  In FIG. 4, only the contact-type energization switch 13 that controls the energization of the pumping motor 21 is shown in a simplified manner in the pressure switch 8. The power is turned on and off.

  As shown in FIG. 4, the conventional measuring means uses a pumping motor 21 of a pumping pump 20 for a time meter 9 driven by a synchronous motor 11 that rotates synchronously with the frequency at which the pumping motor 21 operates with respect to the pressure switch 8 described above. Therefore, when the pressure switch 8 is energized to the pumping motor 21 by using the well water by the above-mentioned user, the power source 6 is also energized to the hour meter 9 at the same time. It will be. In this way, in the conventional measuring means, while the energization of the pumping motor 21 by the pressure switch 8 is being performed, the synchronous motor 11 of the hour meter 9 is driven, and the energization of the pumping motor 21 by the pressure switch 8 is interrupted. In this case, since the synchronous motor 11 of the hour meter 9 stops, the hour meter 9 can measure the operating time of the pumping motor 21.

  And the sewer related companies calculate the amount of water used for well water by multiplying the operation time thus measured (that is, the pump usage time) and the pumping capacity of each pump, and the sewerage charges according to the amount of water used are calculated. Billed users of well water.

  FIG. 5 is a block that assumes a case where an attempt is made to measure the amount of water used in the well water by using the conventional measuring means described in FIG. 4 for the pump 2 that adjusts the discharge pressure by the inverter control device 10 in recent years. FIG. The recent well pump 2 measures the pressure on the discharge side by a pressure sensor (not shown) here, and adjusts the amount of water fed into the pressure tank 15 (see FIG. 3) according to the measured discharge pressure. The discharge pressure is adjusted, and the discharge pressure is adjusted by appropriately converting the frequency and voltage by the inverter control device 10 and controlling the rotation speed of the pumping motor 12.

  As shown in FIG. 5, the pump and pump 2 that adjusts the discharge pressure by inverter control varies in frequency and voltage depending on the pressure in the pressure tank 15 (see FIG. 3). The voltage and frequency of the wire 7a and the wire 7b are not the same. For this reason, with the current flowing through the electric wire 7b, the synchronous motor 11 of the hour meter 9 that rotates synchronously with the rated frequency does not perform constant synchronous rotation.

  Thus, the conventional measuring means cannot accurately measure the operating time of the pumping motor 12 of the pumping pump 2 that adjusts the discharge pressure by inverter control, and cannot calculate the amount of well water used.

JP 2007-187002 A

  As described above, the well pumps in recent years do not adjust the discharge pressure using energization and shut-off of the pumping motor by the pressure switch, appropriately convert the frequency by inverter control according to the pressure on the discharge side, Although it is structured to adjust the discharge pressure by controlling the rotation speed of the pumping motor, if the synchronous motor that drives the hour meter in the conventional measuring means is adopted, the operating time of the pumping motor cannot be measured accurately, There was a problem that the amount of well water used could not be calculated.

  The present invention has been made paying attention to such problems, and it is necessary to prepare an integrating flow meter suitable for each pump discharge port, or a special pump as in the invention described in Patent Document 1. In addition, it is possible to accurately calculate the amount of water used in well water by measuring the operating time of the pumping motor even in a pumping pump that adjusts the discharge pressure by controlling the rotation speed of the pumping motor by inverter control. An object is to provide a well water usage measuring device.

In order to solve the above problems, the well water usage measuring device of the present invention is:
In a measuring device that measures the amount of well water used according to the working time of the pump when using well water,
The measuring device includes an energization detection unit capable of clamping an electric wire, a time recording unit having a time meter, and a used water amount calculation unit,
The energization detection unit has an annular iron core that is partly opened and closed and wound with a coil, and when an electric current flows in the electric wire disposed in the annular iron core, an induced current is generated in the coil. And when the current flowing in the electric wire is equal to or greater than a threshold value, an operation control unit that controls the operation of the hour meter using the induced current,
The time recording unit integrates the operation time of the pump by the operation of the hour meter,
The use water amount calculation unit calculates the use water amount of well water based on the operation time of the pumping pump accumulated by the time recording unit.
According to this feature, since the threshold value of the energization detection unit is set to a current used for operating the pump, the operation control unit when a current exceeding a predetermined threshold value flows in the electric wire. However, by operating the hour meter in the time recording unit, the operating time of the pump can be integrated. In this way, it is a simple structure that only clamps the electric power feeding power to the pump, and it is possible to measure the operating time of the pump, so the pump and inverter that adjust the discharge pressure using a conventional pressure switch In any case of the pumping pump that adjusts the discharge pressure by control, the amount of water used for the well water used by operating the pumping pump can be measured.

The well water usage measuring device according to the present invention is characterized by comprising a driving power source for the time recording section.
According to this feature, the time recording unit main body has its own power supply, so that it can be used permanently only by periodic power supply replacement and inspection. In addition, since the time recording unit itself has a power source, it is not necessary to obtain supply of electricity from the power source of the pumping pump on the customer side, and the economic burden on the customer side can be reduced.

It is a conceptual diagram which shows the structure of the well water usage measuring apparatus in an Example. It is a block diagram which shows a mode that the usage-amount of well water is measured using the well-water usage measuring apparatus in an Example. It is sectional drawing which shows the structure of a pressure tank type pump. It is a block diagram which shows the conventional measuring means. It is the block diagram supposing the case where the measurement of the usage-amount of well water is tried using the conventional measuring means with respect to the pumping pump which adjusts discharge pressure with an inverter control apparatus.

  EMBODIMENT OF THE INVENTION The form for implementing the well water usage-amount measuring apparatus which concerns on this invention is demonstrated below based on an Example.

  A well water usage measuring apparatus 1 according to the present invention will be described with reference to FIGS. 1 and 2.

FIG. 1 is a conceptual diagram showing a configuration of a well water usage measuring device 1.
As shown in FIG. 1, the well water usage measuring device 1 is a measuring device that measures the amount of water used in the well water according to the operating time of the pump 2 when the well water is used. The amount of water used is calculated using the energization detection unit 3 capable of clamping the electric wire 7 supplying the power, the time recording unit 4 connected to the energization detection unit 3, and the operation time of the pumping pump 2 accumulated by the time recording unit 4. It is comprised from the used water quantity calculation part 5 to do.

  As shown in FIG. 1, the energization detection unit 3 includes a main body 31 and a clamp 14 that is attached to the main body 31 so as to be openable and closable with one end as a fulcrum. An annular core 32 around which a coil (not shown) is wound is disposed. The electric wire 7 can be disposed inside the annular core 32 by clamping the electric wire 7 with the clamp portion 14. For this reason, when a current flows through the electric wire 7, an induced current is generated in the coil wound around the annular core 32.

  The energization detection unit 3 is set so that an operation control unit 33 (for example, a transistor switch) built in the energization detection unit 3 is energized when a current exceeding the set threshold value flows through the electric wire 7. ing.

  As shown in FIG. 2, the time recording unit 4 has a built-in hour meter 90, and this hour meter 90 is connected to the operation control unit 33 in the energization detection unit 3. Counting is performed while the unit 33 is in the energized state, and the count is stopped when the energized state of the operation control unit 33 is released.

  In addition, since the threshold value set in the energization detection unit 3 described above is set to a current required for driving the pumping motor 12 in the pumping pump 2, the time recording unit 4 is energized only when the pumping motor 12 is in operation. Will be.

  In this way, the time recording unit 4 is energized in accordance with the operation of the pumping motor 12 and performs counting, so that the energizing time to the pumping motor 12 can be integrated.

  The water consumption calculation unit 5 stores the pumping capacity of the pumps 2 of the wells used by each managed user. The pumping capacity per hour and the time recording unit 4 integrated the pumping capacity. The amount of water used in each well is calculated by multiplying the operation time of the pump 2.

  As described above, the well water usage measuring device 1 of the present invention includes the energization detection unit 3 capable of clamping the electric wire 7, the time recording unit 4 having the hour meter 90, and the usage water amount calculation unit 5, and includes an energization detection unit. 3 has an annular core 32 that is partially opened and closed and wound with a coil, and generates an induced current in the coil when a current flows in an electric wire arranged in the annular core 32. When the current flowing in the electric wire is equal to or greater than the threshold value, the operation control unit 33 that controls the operation of the hour meter 90 using the induced current is provided. The operation time of the pump 2 is integrated, and the use water amount calculation unit 5 calculates the use water amount of the well water based on the operation time of the pumping pump 2 integrated by the time recording unit 4. According to this, since the threshold value of the energization detection unit 3 is set to the current used for the operation of the pumping pump 2, it operates when a current exceeding a predetermined threshold value flows in the electric wire 7. When the control unit 33 operates the hour meter 90 in the time recording unit 4, the operating time of the pumping pump 2 can be integrated. Furthermore, the usage amount of well water can be calculated by multiplying the operating time of the pump 2 accumulated by the time recording unit 4 by the pumping capacity per hour of the pump 2 by the usage amount calculator 5. . Thus, since the operation time of the pumping pump 2 can be measured with a simple structure that only clamps the electric wire 7 that supplies power to the pumping pump 2, the pumping water that adjusts the discharge pressure using the conventional pressure switch 8 is possible. In any case of the pump 20 and the pumping pump 2 that adjusts the discharge pressure by the inverter control device 10, it is possible to measure the amount of well water used by operating the pump.

  Moreover, since the well water usage measuring apparatus 1 has the power supply of the said time recording part 4 in itself, permanent use is possible only by periodic power supply replacement | exchange and inspection. In addition, since the time recording unit 4 itself has a power source, it is not necessary to obtain supply of electricity from the power source of the customer-side pump, thereby reducing the economic burden on the customer side. The power source of the time recording unit 4 here is preferably a battery that can be easily replaced.

  Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and modifications and additions within the scope of the present invention are included in the present invention. It is.

  For example, in the figure of the said Example, although the electricity supply detection part 3 and the time recording part 4 or the time recording part 4 and the water consumption calculation part 5 are connected with the cable, the electricity supply detection signal detected by the electricity supply detection part 3 is shown. The time recording unit 4 has a function that can be caught wirelessly, or the energization time data accumulated by the time recording unit 4 is put on the water consumption calculation unit 5 existing at a remote position from the time recording unit 4 on radio waves or the like. Then, a method of transmitting and receiving may be used.

  The energization detection unit 3 may generate an energization detection signal by a dielectric current generated in the coil and send it to the time recording unit 4 when a current flows in the electric wire 7. The time recording unit 4 can integrate the operation time of the pumping pump 2 by operating and recording the hour meter 90 while the energization signal is sent from the energization detection unit 3. The energization detection unit 3 sends a drive signal, which is an output capable of driving the time recording unit 4, to the time recording unit 4 instead of the energization detection signal when a current flows in the electric wire 7. Also good.

DESCRIPTION OF SYMBOLS 1 Well water usage measuring device 2 Pumping pump 3 Energization detection part 4 Time recording part 5 Use water quantity calculation part 6 Power supply 7 Electric wire 8 Pressure switch 9 Hour meter 10 Inverter control device 12 Pumping motor 13 Energization switch part 14 Clamp part 31 Energization detection part Main body part 32 annular iron core 33 operation control part 90 hour meter

Claims (2)

In a measuring device that measures the amount of well water used according to the working time of the pump when using well water,
The measuring device includes an energization detection unit capable of clamping an electric wire, a time recording unit having a time meter, and a used water amount calculation unit,
The energization detection unit has an annular iron core that is partly opened and closed and wound with a coil, and when an electric current flows in the electric wire disposed in the annular iron core, an induced current is generated in the coil. And when the current flowing in the electric wire is equal to or greater than a threshold value, an operation control unit that controls the operation of the hour meter using the induced current,
The time recording unit integrates the operation time of the pump by the operation of the hour meter,
The well water usage measuring device, wherein the water usage calculating unit calculates the water usage of the well water based on the operation time of the pumping pump accumulated by the time recording unit.   The well water usage measuring device according to claim 1, further comprising a driving power source for the time recording unit.

Images