KR200332116Y1 - Level controller of water reservoir using the changing of current of motor pump in ground water - Google Patents

Abstract

The present invention relates to a wireless water level regulator for supplying water to a water tank when the water tank 20 and the pump motor 21 and the water tank are far apart (several m to several km) in anticipation of the low water level. . For this purpose, by installing the float 42 and the pressure valve 43 in the water pipe 41 at the top of the water tank, when the water tank becomes a high water level, the pressure in the water pipe is increased so that the load on the pump motor is increased and sensed. The well pump was turned on / off. For this purpose, the current of the pump motor is measured by the AC current sensor, and the load of the pump motor is increased, that is, when the water tank is at a high level. To predict the water usage, the pump motor is driven every 24 hours until the water tank reaches a high level to find out the water usage by time zone. Find out the timing and adjust the water tank level.

Description

Level controller of water reservoir using the changing of current of motor pump in ground water}

Conventionally, when the distance between the water intake well 20 and the pump motor 21 and the water tank 44 for storing them is far apart, the water pipe 41 for delivering water and the wiring for transmitting a detection signal are simultaneously buried. Or, separate wires can be connected, which can cause problems due to disconnection or short circuit. As such, there is a method of realizing the water level controller of the water tank by wireless communication without detecting the detection signal by wire, but in this case, the system is not only a device for detecting the water level in the water tank but also a communication device and a power supply system. This raises the cost and raises problems such as malfunction due to various interference.

Another way to solve this problem is to attach a float 42 and a pressure valve 43 to the top of the water tank so that the pressure valve closes when the water tank reaches a high water level. The water level of the water tank was adjusted by stopping the operation of the motor, but additional installation and maintenance costs are increased because a separate pipe work is required to attach the pressure sensor in the water pipe.

In order to solve the above problems, the present invention has a water tank having a high water level 45 when the distance between the pump motor 21 for taking ground water and the water tank for storing the water is far apart. When the pressure valve 43 is locked by the buoy 42 in 44, the pressure increases in the water supply pipe 41, and the load of the pump motor 21 is used. As the load of the pump motor increases, the current flowing in the pump motor increases, and thus, when the load of the pump motor is measured, it is possible to know when the water level of the water tank becomes the high level 44. At this time, it is intended to stop the pump motor, and to predict the time when the low water level after a predetermined time to adjust the water level of the water tank. As shown in FIG. 4, when the current rises to the maximum ( I _{max in} FIG. 4) at the initial stage of driving of the pump motor, the current becomes stable after a predetermined time when the pressure valve is not closed. After stabilization, if the current value of the pump motor is greater than a predetermined time (2 seconds) longer than the set cutoff current ( I _{off in} FIG. 4), the pressure valve is determined to be in a closed state, that is, a high water level.

In addition, the technique used in the present invention can measure only the time point when the water level in the high water tank (45) instead of continuously measuring the water level in the water tank to predict the low water level after a predetermined time to drive the pump motor It is important to supply water to the tank. To this end, the water tank capacity and the pump amount per hour are input through the display and input unit 56 of FIG. 2, so that the water tank level controller 50 starts the operation of these data and the pump so that the water tank takes a high water level. Characterized by measuring the amount of water used by the time zone by measuring.

1 is an overall configuration of the water tank level regulator

2 is a block diagram of a water tank level regulator

3 is an overall flow chart of the water tank level regulator

4 is a change in the current of the pump motor when measuring the rated current of the motor of the pump

5 is a flow chart for measuring the pump motor rated current

6 is a change in the pump motor current during the pump motor operation

7 is water usage measurement by time zone

8 is a detailed time slot water consumption

<Explanation of symbols for main parts of drawing>

20: water well

21: pump motor

22: AC power cord

23: AC power

41: water pipe

42: float

43: pressure valve

44: water tank

45: high water

46: low water level

47: water supply pipe

50: water tank level regulator

51: control and signal processing unit

52: memory section

53: A / D converter

54: AC SSR section

55: AC current sensor

56: display and input unit

When power is applied to the water tank level regulator, data such as the water tank capacity, the pump amount per hour, and the like stored in the memory chip 52 of FIG. 2 are read in step S10. After the system initialization, the rated current of the pump is measured in S20, which will be described in detail with reference to FIG.

When driving the pump motor using the AC SSR 54, the load (current) increases initially for acceleration and then stabilizes. During this period (about 5 to 15 seconds), the maximum current value ( I _{max in} FIG. 4) is increased. After the measurement, the average current ( I _m in FIG. 4) is obtained for a predetermined time (2 seconds). At this time, when the water tank level is a high water level, the flow of water is blocked by the float 42 and the pressure valve 43, so that the current of the pump motor increases without being stabilized as shown in FIG. In order to check this condition check is less than the rated current I _m is I _chk in step S25 and to be measured only when the rated current is small I _m. Since the size of I _m varies according to the capacity of the pump motor, to solve this problem, check that I _m and I _chk are divided by I _max , respectively. If the rated current is not obtained, the water tank of the water tank is lowered in step S30 and the rated current of the pump motor is measured again after a time (1 hour to 2 hours) delay until the pressure valve 43 is opened. When the rated current measurement is completed, operate the pump motor in step S50 to set the high water level, and then set the water tank to the high water level by operating the pump every predetermined time (2 hours) to measure the water consumption by time zone in S60.

In order to check that the water tank is at a high water level in S50 and S60, if the current of the current pump is greater than a predetermined time (2 seconds) more than the cutoff current ( I _{off in} FIG. 6), the water tank is determined to be at a high water level and the pump motor is operated. Stop it. Here, in order to solve the difference in the magnitude of the breaking current according to the capacity of the pump motor, dividing the breaking current I _off by the rated current I _m is the breaking current rate SI _off , and the current I flowing through the pump motor is SI _off I _m. If it is bigger than a certain time (2 seconds), it is high water level.

Detailed description of water usage measurement by time is as follows. In FIG. 7, when it takes time to start the i-th time zone pump to reach a high water level is EQT _i and the pump amount per hour is Q _p , the i-th time zone usage EQ _i becomes QpEQT _i . FIG. 7 shows an example of water usage by time slots at two hour intervals for 24 hours. If the water usage changes significantly, the water usage can be measured at intervals less than two hours. In order to measure water usage more accurately, the amount measured every two hours is subdivided into four two-hour intervals, that is, every 30 minutes, as shown in FIG. You can even subdivide it into four or more to make it more accurate. At this time, the water consumption Q _ij = EQ _i / 4 used in the j- th subdivided time zone in the i-th time zone becomes.

After completing step S60, the water tank will be at a high level. From this time on the capacity to adhere to the sum of water consumption broken down into 30-minute intervals i.e. low water amount Q △ and when the approximation, it is judged as low level and drives the pump motor. That is, the water level of the k-th operation to the nearest point on the estimated amount Q _k △ Q during the period when the water tank when Qt _k La in high water level point is looking at a low level. Q _k is In this way, Qt _{i, j} represents a time corresponding to Q _{i, j} .

Above, the amount of time because the predicted water level time, anticipating that the water amount Q _k of the water tank, the actual amount of the water tank through the water supply line 47 to the pump motor operation there is a water level in the water tank high water level in the water level QT _k If the pump volume per hour is Q _p , the amount of water actually required is QR _k = Q _p QT _k . By using this, water consumption by time zone belonging to the kth operation time can be calculated . This correction enables the prediction of the change in water consumption caused by relatively slow changes such as seasonal changes and the increase or decrease of the number of people used.

The device of the present invention does not require a separate wiring, communication device and power supply to transmit a sensing signal for measuring the water level around the water tank to a remote water tank level regulator via wire or wireless. There is no need for plumbing in the manner used. However, in order to increase the load on the pump motor at a high water level, that is, to increase the pressure of the water pipe 41, a fitting port 42 and a pressure valve 43 are installed on the water tank side to measure and control the current of the pump motor. AC wire 22 to the motor is connected through AC current sensor 55 and AC SSR 54, and the user can change the water tank capacity, pump volume per hour, low water level, breaking current rate, etc. Installation and maintenance is superior to the existing device because only the input value through the display and input unit 56 of the setting value.

Claims (6)

When the water level in the water tank reaches a high level, the pressurized valve is operated by the float to increase the pressure in the water supply pipe, which increases the load of the well and simultaneously increases the current. A device for opening and closing the power of the wireless water level well pump to determine and operate the well pump. According to claim 1, in order to predict the high water level of the water tank, a ball tower (bulet and pressure valve) is installed inside the water tank to increase the pressure in the water supply pipe at high water level, the load of the well pump increases and the amount of current required is increased. A device for turning on / off a well pump by using increasing characteristics. According to claim 2, when the water level of the water tank is a high water level when the ball tower rises to block the pipe while the pressure in the water pipe increases to detect the increase in the amount of current according to the load rise of the well pump when the first well pump This is a device that measures the rated current amount except the starting current, and sets the high water level of the water tank based on this, and turns off the well pump according to the weight of the current. According to claim 1, in order to predict the quantity of water tank, the water consumption for each time zone is driven by a pump motor every predetermined time to determine the time required for the high water level and the low water level by using the water tank capacity and pump capacity. Device to determine when to start The water tank according to claim 1, wherein the water tank is divided at a high time point to the present so that the sum of the water hours at the highest level is closest to that of the water tank to accurately predict when the water tank is at a low water level. It is a device that determines the operation time of the well pump by determining the low water level by driving the pump motor until the high water level is reached. The apparatus of claim 5, wherein the pump motor is driven at a low level predicted time point to measure a time taken to reach a high water level at a low level time point, and the actual amount of water used is corrected to correct water usage by time zone to determine an accurate well pump operating cycle.