KR20060101430A - Automatic pumping test apparatus - Google Patents

Abstract

The present invention is an automatic pumping test device that is automatically composed of a pump, a flow meter, a valve, a water gauge and a control unit for controlling the pumping in the groundwater pumping test carried out to grasp the groundwater flow and flow rate in the aquifer, The pump and valve are operated automatically according to the set target flow rate to maintain a constant flow rate during the test without further operator intervention.

The present invention not only significantly improves the accuracy of the pumping test, but also allows the setting of the pumping amount for each step in the pumping step freely, thereby expanding the testing step and performing it with a small number of personnel. The pumping test can be carried out easily and without error, thereby reducing the cost of the pumping test and reducing the time required.

Pump test, pump, pump, micro controller unit (MCU), storage device

Description

Automatic groundwater pumping test apparatus

1 is a conventional pumping test state diagram

Figure 2 is a pumping test situation applied to the present invention

Figure 3 is an embodiment block diagram of the present invention

4 is a modified embodiment block diagram of the present invention;

5 is a flow chart of the pumping test process according to the embodiment of FIG.

<Code Description of Main Parts of Drawing>

10: control unit

11: MCU (micro controller unit)

12: storage device

13 AD conversion unit (analog-digital converter)

20: pump

21: motor

22: drive unit

30: flow meter

40: valve

50: water gauge

60: pump

90: positive crystal

91: aquifer

99: hydraulic slope

The present invention is an automatic pumping test device that is automatically composed of a pump, a flow meter, a valve, a water gauge and a control unit for controlling the pumping in the groundwater pumping test carried out to grasp the groundwater flow and flow rate in the aquifer, The pump and valve are operated automatically according to the set target flow rate to maintain a constant flow rate during the test without further operator intervention.

Pumping test is a test to observe the water level decrease while pumping well water, and to recover the water level after stopping the pumping water in order to grasp the characteristics of aquifer and the head loss of groundwater level due to the well.

FIG. 1 illustrates a situation in which a pumping test is performed by installing a pump 20, a flow meter 30, a valve 40, and a water level meter 50 in a pumping well 90. The situation in which the hydraulic inclination line 99 of Δ is changed is shown.

In this pumping test, it is necessary to keep the pumping amount constant during pumping in order to derive meaningful test results. In pumping test, the pump head changes rapidly unlike the operating conditions of the general pump 20. Since it is very difficult to maintain the amount of pumping, and generally skilled workers to adjust the pumping amount by adjusting the valve 40 through the flow meter (30).

That is, the operation condition of the pump 20 is set to the target flow rate at the maximum lift and is operated, the flowmeter 30 is checked at any time, and the flow rate is kept constant by adjusting the opening degree of the valve 40. Therefore, if the actual head is less than the set value is excessive pumping is made accordingly to reduce the opening degree of the valve 40 according to the excessive water pressure acting on various equipment, including the pump pipe 60 is a serious problem that the equipment is damaged there was.

Therefore, the pumping test apparatus of Utility Model Registration No. 321843 was developed to return the pumped water to the pumping well 90 when the pumping water exceeded the target value. However, in the process of returning the pumped water to the pumping pump 90 again, As the delay time is generated, it not only adversely affects the reliability of the test results, but also causes a misunderstanding in the water level measurement due to disturbance of the water in the well (90) during the input of the return water.

In addition, since a series of operations are all made by the operator, not only a high degree of skill is required, but also a serious problem in that a lot of trial and error occurs in the test process.

The present invention has been made in view of the above-mentioned problems, and consists of a pumping pipe which is introduced into a pumping well, a valve, a flow meter, a pump and a control unit for controlling them, and a water meter for measuring the level of the pumping pump and inputting it to the controller. The pump output and valve opening degree are automatically adjusted according to the target pumping amount, and the pump is controlled in consideration of the pumping head, so that an efficient and accurate pumping test can be performed without additional operator's operation.

The detailed configuration and operation principle of the present invention will be described with reference to the accompanying drawings.

First, FIG. 2 shows a pumping test situation to which the present invention is applied, and as can be seen from the drawing, the present invention includes a pumping pipe 60, a valve 40, a flow meter 30, a pump 20, It consists of the control part 10 and the water gauge 50.

3 is a block diagram showing the components of the present invention, in particular the components of the control unit 10, the control unit 10 controls the drive unit 22 for driving the motor 21 of the pump 20, MCU (micro controller unit) for receiving the pumping amount and the water level in the pump (90), that is, the pump 20 of the pump 20 from the flow meter 30 and the water level meter 50, and stores the received information in the storage device 12 11, the storage device 12 containing the information obtained during the test and the control information of the flow rate and the head unit 22, and the analog signals of the sensing devices such as the flow meter 30 and the water level meter 50. The MCU 11 is composed of an AD converter 13 for converting a readable digital signal.

In addition, an input device such as a keyboard or keypad to which an operator's operation signal is input, and an output device such as a monitor or LCD that display the progress of the work may be added, but this is in the technical field to which the present invention pertains. Not only the matter can be selected by those skilled in the art, but also the operation signal input can be achieved through programming to the memory device 12 without a separate input device, so the specific limitations of the claims are not intended. Do not.

The present invention having the configuration as shown in FIG. 3 controls the pump 20 to maintain a target pumping amount set by a field operator or a device maker in the progress of the pumping test, and the specific principle thereof is as follows.

First, the pumping amount adjustment of the pump 20 is achieved by adjusting the rotation speed and the torque of the motor 21 driving the pump 20. Such driving condition adjustment of the motor 21 is performed by the driving unit 22 of the motor 21. By controlling

Here, the driving unit 22 of the motor 21 may take the form of a variable resistor or a transformer for adjusting the current or voltage input to the motor 21, and in the case of the synchronous motor 21, it may be an inverter. It is a matter that can be changed according to the type of (20), all of them can be controlled by the MCU (11) of the controller 10 is defined as the driver (22).

In general, that is, if the change of the head is not large, it is possible to adjust the pumping amount by controlling the drive unit 22 through the trial and error method by the MCU 11 with reference to the flowmeter 30, but the pumping water to which the present invention is applied In the case of the test, since the level change in the well (90) is continuously progressed in the test period, especially in the early stage of pumping, the head is also continuously changed, the effective control is not possible with the above method.

That is, since the operation characteristic of the pump 20 changes rapidly as the head is changed, the pump 20 is promptly controlled by applying required control values such as the required current or voltage of the motor 21 for each head in real time. Only then can the target pumping quantity be maintained.

Therefore, the required control values of the motors for each head 21 are stored in the storage device 12 in advance, and in the actual test, the MCU 11 calculates the head according to the measurement information of the water level gauge 50, and the storage device ( The required control value of the motor 21 is withdrawn from the 12 and is immediately applied to control the driving unit 22. The required control value of the motor for each head 21 is changed to the storage device 12 in a minute unit. It has a database form of the characteristic curve of the pump 20 provided for each head.

On the other hand, the storage device 12 of the present invention comprises a communication port in the control unit 10, or in the form of a removable flash memory itself is connected to an external device such as a computer, so that the recording and testing of the database The result can be obtained.

4 is configured to control the pumping amount of the pump 20, the valve 40 by the electric valve 40 and connected to the MCU 11, the control of the drive unit 22 and the opening degree of the valve 40 is adjusted In parallel, effective control is possible while reducing the capacity of the control database.

That is, in acquiring the control information for each head in the control value database stored in the storage device 12, by recording only the control information for the predetermined head range of the average value concept, not the control information for the head that changes in units of minute. The required capacity of the database is greatly reduced, and the pumping amount fine adjustment within the corresponding head range is performed by adjusting the opening degree of the valve 40.

Pumping test process by the parallel control of the drive unit 22 and the valve 40 is shown in FIG.

On the other hand, although omitted in Fig. 5, the water level in the pumping well 90, which is the result of the pumping test, is measured by the water gauge 50 and recorded in the storage device 12 together with the measurement time. Easy and accurate recording is possible without

Eventually, the technical gist of the present invention includes a water gauge 50 and a pump pipe 60 which are introduced into a pumping well 90, and a valve 40, a flow meter 30, and a pump 20 connected to the pump pipe 60. In the pumping test apparatus, a control unit 10 is connected to a driving unit 22 that drives the motor 21 of the pump 20, and the control unit 10 is connected to the MCU 11 controlling the driving unit 22. It is composed of a memory device 12, the MCU 11 is connected to the flow meter 30 and the water level meter 50, the memory device 12 stores the control value of the drive unit 22 for each target pumping quantity for each of a plurality of heads The MCU 11 records the information received from the flowmeter 30 and the water level meter 50 in the storage device 12, and the MCU 11 draws out the control value from the storage device 12 to drive the drive unit 22. An automatic groundwater pumping test apparatus, characterized in that for controlling, the valve 40 is an electric valve 40, the MCU 11 is connected to the valve 40, the MCU 11 of the valve 40 Opening degree ( A ground water pumping automatic test equipment, characterized in that the control 度).

The present invention not only significantly improves the accuracy of the pumping test, but also allows the setting of the pumping amount for each step in the pumping step freely, thereby expanding the testing step.

In addition, even with a small number of people, the pumping test can be easily performed without trial and error, thereby reducing the cost of the pumping test and reducing the time required.

Claims (2)

In the pumping test apparatus which includes a water level meter 50 and a pumping pipe 60 and a valve 40, a flow meter 30, and a pump 20 connected to the pumping pipe 60, A control unit 10 is connected to the driving unit 22 for driving the motor 21 of the pump 20; The control unit 10 is composed of an MCU 11 for controlling the driving unit 22 and a storage device 12 connected thereto; The flowmeter 30 and the water level meter 50 are connected to the MCU 11; The storage device 12 stores the control values of the driving unit 22 for each target pumping quantity for each of a plurality of heads; The MCU 11 records the information received from the flowmeter 30 and the water level meter 50 in the storage device 12; Automatic ground water pumping test device characterized in that the MCU (11) withdraws the control value from the memory device (12) to control the drive unit (22). 2. The valve (40) according to claim 1, wherein the valve (40) is an electric valve (40), and a valve (40) is connected to the MCU (11); Automatic groundwater pumping test device, characterized in that the MCU (11) adjusts the opening degree of the valve (40).

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