KR102476180B1 - Underground drain pump management device - Google Patents

Abstract

The present invention, a drainage pump unit for pumping out water from an underground power outlet; a plurality of water level sensor units measuring water level information of the underground power outlet; a current/voltage sensor unit measuring a current or voltage applied to the drainage pump unit; an insulation resistance sensor unit measuring insulation resistance of the drainage pump unit; a temperature/vibration sensor unit measuring temperature or vibration of the drainage pump unit; a control unit controlling an operation of the drainage pump unit when a measured value is obtained from at least one of the water level sensor unit, the current/voltage sensor unit, the insulation resistance sensor unit, and the temperature/vibration sensor unit; A drainage pump unit management device including a is described.

Description

Drainage pump management device for underground power outlet {UNDERGROUND DRAIN PUMP MANAGEMENT DEVICE}

The present invention relates to a drainage pump unit management device capable of predicting failure or remotely controlling a drainage pump unit installed in an underground power outlet.

An underground power tunnel collectively refers to a space for collectively accommodating wires for electric power communication. The underground tunnel may be configured in a wide tunnel form so that a person can directly inspect or repair it.

The underground power outlet may be provided at every point of the underground tunnel under the road. Underground power outlets may be provided at specific points in the underground tunnels. Workers can enter and exit through the underground power pit, and the worker can access an arbitrary location of the underground tunnel through the underground power pit, and can reach a location requiring inspection. In a city center without power poles, there can be dozens to hundreds of power outlets every 1-2 km. Inspection, maintenance, and repair of numerous underground power outlets can require considerable manpower and time.

An object of the present invention is to provide a management device for a drainage pump unit for an underground power outlet.

Another object of the present invention is to provide a method for diagnosing a failure of a management device of a drainage pump unit for an underground power outlet.

The present invention, a drainage pump unit for pumping out water from an underground power outlet; a plurality of water level sensor units measuring water level information of the underground power outlet; a current/voltage sensor unit measuring a current or voltage applied to the drainage pump unit; an insulation resistance sensor unit measuring insulation resistance of the drainage pump unit; a temperature/vibration sensor unit measuring temperature or vibration of the drainage pump unit; a control unit controlling an operation of the drainage pump unit when a measured value is obtained from at least one of the water level sensor unit, the current/voltage sensor unit, the insulation resistance sensor unit, and the temperature/vibration sensor unit; A drainage pump unit management device including a is described.

A drainage pump unit may always be provided in the underground power outlet, and the drainage pump unit may be driven to secure electrical insulation of the underground power outlet and prevent a short circuit (short) of the device when it is filled with water due to a rainy season or flood.

The frequency of using the drainage pump unit may depend on the amount of water in the underground power outlet. In some cases, it may not be known whether the drainage pump unit is operating normally, and when the underground power outlet is filled with water, drainage treatment may not be performed properly due to a malfunction of the drainage pump unit.

In the case of a malfunction of the drainage pump, flooding of the underground power outlet may occur due to improper drainage treatment, and since several pipelines such as electricity, gas, and communication pass through the underground power outlet, fire and explosion due to electrical factors may occur in case of flooding. have.

According to the present invention, it is possible to remotely determine whether or not the drainage pump unit is normally operating, and automatically drive itself according to the submerged state of the underground power outlet. Drainage pump parts that are broken or malfunctioning can be used without inspection.

1 is a photograph of an underground power outlet in which a drainage pump unit of the present invention is installed.
Fig. 2 is a block diagram of a drain pump management device according to the present invention.
3 is an operation flow chart of the drain pump unit management device of the present invention.
4 is an operation flowchart of the insulation resistance sensor unit of the present invention.
5 is an operation flowchart of the water level sensor unit of the present invention.
6 is an operation flowchart of the current/voltage sensor unit and the temperature/vibration sensor unit according to the present invention.

1 is a photograph of an underground power outlet.

Referring to FIG. 1, since the underground power outlet is provided underground, it is easy to be damaged by flooding in the event of a rainy season or flood, and if the underground power outlet is filled with water, a power accident may occur. damage may occur.

Referring to FIG. 2, the drainage pump unit 100 management device of the present invention includes a drainage pump unit 100, a water level sensor unit, a current/voltage sensor unit 160, an insulation resistance sensor unit 150, a temperature/vibration sensor unit At least one of the sensor unit 180 and the control unit 190 may be included.

The drainage pump unit 100 may pump out water from an underground power outlet and may include a first pump 101 and a second pump 102 . If two or more drainage pump units 100 are configured, a large amount of water can be drained when mutual automatic replacement operation or when the drainage water amount increases at one time, and individual operation or simultaneous operation is possible. If one pump fails, another pump can be automatically switched to operate only the necessary pumps. In the rainy season, when the amount of water is high, there can be a lot of overload and the risk of failure can be high, so two or more pumps can be driven simultaneously to share the load and quickly drain the water before it reaches a level that damages the device. can spread

A means for determining whether the drainage pump unit 100 is driven is required.

This may be by level measurement. The water level sensor unit may be an element that determines whether or not the drainage pump unit 100 is driven, a driving timing, a driving method, and the number of driven units. A water level sensor unit may be installed to measure the water level. The water level sensor unit may determine the amount of water in the underground power outlet and transmit it to the control unit 190 at a remote location. The control unit 190 may issue a drive command to the drain pump unit 100, or the water level sensor unit and the drain pump unit 100 may be directly interlocked.

The water level sensor unit may be provided at several locations in the underground power outlet. The water level sensor unit may include a first water level sensor 111 unit 110a, a second water level sensor 102 unit 110b, and an Nth water level sensor unit.

A plurality of water level sensors may be mounted on each water level sensor unit for each height. For each water level measurement value W, each water level sensor may generate an on/off output value.

The water level sensor of the present invention does not have a complicated structure for continuously measuring the water level, but a water level sensor having a simple structure for each height is installed and a section detection type water level sensor for detecting whether or not the water level is full for each height is applied. This is for a simple structure and digital input/output of data, and can improve the reliability of the determination of the control unit 190.

As a means for measuring electrical abnormality of the drain pump unit 100, an insulation resistance sensor unit 150 or a current/voltage sensor unit 160 may be provided. If the three-phase power supply unit 140 is not insulated, a worker may be electrocuted.

The insulation resistance sensor unit 150 may measure an electrical abnormality between the outside of the drain pump unit 100 and the three-phase power supply unit 140 . The current/voltage sensor unit 160 may measure electrical abnormalities such as a three-phase coil, a brush, a driving circuit, and other electrical elements provided inside the drainage pump unit 100 .

In order to measure the electrical abnormality of the drainage pump unit 100, the current/voltage sensor unit 160 of the present invention can measure the electrical abnormality of the drain pump unit 100 in order to simplify measurement and simplify the structure. It is suggested

A current/voltage sensor unit 160 for measuring current or voltage applied to the drain pump unit 100 may be included. The control unit 190 may determine whether the drainage pump unit 100 has a circuit problem through the current/voltage value.

Referring to FIGS. 2 and 3 , the control unit 190 controls a measured value from at least one of a water level sensor unit, a current/voltage sensor unit 160, an insulation resistance sensor unit 150, and a temperature/vibration sensor unit 180. When this is acquired, the operation of the drainage pump unit 100 can be controlled. If a worker approaches an underground power inlet in a state where it is filled with water, a short accident may occur, so it may be desirable to scoop out the water first and then perform other work.

Referring to FIG. 3 , the control unit 190 compares the measurement value of the water level sensor unit to a measurement value of at least one of the current/voltage sensor unit 160, the insulation resistance sensor unit 150, and the temperature/vibration sensor unit 180. can be obtained in the first place. When it is determined that all the water has been scooped out according to the measurement value of the water level sensor unit, there is no risk of electric shock, so at least one of the current/voltage sensor unit 160, the insulation resistance sensor unit 150, and the temperature/vibration sensor unit 180 It is possible to determine whether measurement values are obtained or not, and whether to initiate management or measurement tasks.

Referring to FIG. 3 , in reference numeral S500 , the water level sensor unit may measure the water level. In reference numeral S11 , the drainage pump unit 100 may be driven when the water level measurement value is output from the water level sensor unit. If the underground power outlet is filled with water and needs to be pumped out, this is to prioritize pumping out the water without doing all the other work.

In reference numeral S12, the drainage pump unit 100 is driven and can pump out all the water. In reference numeral S600, since the water has been pumped out, the state measurement mode can be entered.

The state measurement mode indicated by reference numeral S600 may be a mode for measuring the current/voltage sensor unit 160 and the temperature/vibration sensor units 180 and 180 of FIG. 6 . Circuit failure can be determined by measuring the current or voltage consumed when the current/voltage sensor unit 160 drives the drainage pump unit 100. Mechanical failure can be determined by whether the temperature rises or vibrations occur while the drainage pump unit 100 is running, and the temperature/vibration sensor unit 180 measures the temperature or vibration of the drainage pump unit 100. can be determined by

An insulation resistance sensor unit 150 for measuring insulation resistance of the drainage pump unit 100 may be included. When a worker approaches the drainage pump unit 100 and performs measurement and management tasks in a state of low insulation resistance, accidents such as electric shock or fire due to overheating and shock may follow. When measuring insulation resistance, if there is moisture, the resistance will be lower than usual and there may be a lot of leakage current.

When the water level is low at reference sign S11, insulation resistance measurements can be made because there is no risk of electric shock. Reference numeral S14 is an insulation resistance measurement mode of the insulation resistance sensor unit 150 . The measurement of the insulation resistance sensor unit 150 is not performed in the operating state measurement mode of the drainage pump unit 100 of reference numeral S600.

In order to measure the insulation resistance value when driving of the drainage pump unit 100 is stopped, it is possible to measure the insulation resistance value in a state where a high-voltage measurement current flows. However, if the measurement is performed in a state where water flows, an electric shock may occur and a fatal accident may occur.

If the water level measurement value of the water level sensor unit of reference numeral S500 is not output, there is no need to scoop out water and there is no risk of electric shock, so the insulation resistance measurement mode of reference numeral S14 can be executed.

In the step of determining whether the insulation resistance of reference numeral S14 is measured, the drainage pump unit 100, the current/voltage sensor unit 160, and the temperature/vibration sensor unit 180 stop operating, and the insulation resistance sensor unit 150 ) may be a mode for measuring the insulation resistance value of the drainage pump unit 100.

If it is determined at reference sign S14 that the insulation resistance needs to be measured, power off at reference sign S15 can be executed. The power of the three-phase power supply unit 140 applied to the drainage pump unit 100 may be turned off in step S15.

The insulation resistance measuring mode indicated by reference numeral S400 may be a step of measuring the insulation resistance of the drainage pump unit 100 . When the measurement of the insulation resistance of reference sign S400 is completed, the step of transmitting the measured value of reference sign S13 may be executed. An insulation resistance measurement value or insulation determination result may be transmitted to the control unit 190 .

Referring to Figures 2 and 4, the insulation resistance measurement method is described as follows.

A three-phase power supply unit 140 supplying power to the power cable 120 of the drainage pump unit 100 may be provided. A power switch 142 for turning on/off power supply to the three-phase power supply unit 140 may be provided. The three-phase coil of the three-phase power supply unit 140 and the drain pump unit 100 may include a U-phase, a V-phase, and a W-phase. Reference sign G may mean ground or ground terminal.

A terminal unit 130 connecting the power cable 120 to the three-phase power unit 140 may be provided. A detachable portion 131 may be provided to detach the electrical connection between the power cable 120 and the terminal portion 130 .

After the electrical connection between the power cable 120 and the terminal unit 130 is disconnected by the detachable unit 131, the insulation resistance sensor unit 150 or the current/voltage sensor unit 160 is located at the position where the electrical connection is disconnected. can be connected When the measurement of the insulation resistance sensor unit 150 or the current/voltage sensor unit 160 is completed, the insulation resistance sensor unit 150 or the current/voltage sensor unit 160 is electrically connected from the power cable 120 and the terminal unit 130. can be separated into The insulation resistance sensor unit 150 may be intervened in a connection position between the outside of the drainage pump unit 100 and the three-phase power supply unit 140 .

The current/voltage sensor unit 160 may be installed outside the drainage pump unit 100 and at a location where the three-phase power supply unit 140 is connected, or located in a three-phase coil inside the drainage pump unit 100.

4 specifically shows the insulation resistance measurement mode.

At reference numeral S22, the insulation resistance measurement mode has been entered.

In reference numeral S23, it can be determined whether or not the three-phase power supply unit 140 is turned off.

If the three-phase power supply unit 140 is not turned off, in reference numeral S21, the three-phase power supply unit 140 is turned off.

If the three-phase power supply unit 140 is turned off, the entire line can be separated from reference numeral S24. In reference numeral S24 , power connections between the drainage pump unit 100 and the three-phase power supply unit 140 may be turned off to measure insulation resistance. It can be checked whether the three-phase power supply unit 140 of the drain pump unit 100 is turned off and the three-phase power supply unit 140 is also turned off.

In reference numeral S25, a line for measurement can be connected. A line for measurement may be connected to a position where the electrical connection between the drainage pump unit 100 and the three-phase power supply unit 140 is released.

In reference numeral S26, high-voltage electricity for measurement may be applied to the line for measurement. An insulation resistance sensor unit 150 is electrically connected to the drainage pump unit 100 replacing the three-phase power supply unit 140, and the insulation resistance sensor unit 150 applies high-voltage electricity for measurement to the drainage pump unit 100. can do.

At reference sign S27, an insulation resistance measurement can be performed. To measure the insulation resistance, the insulation resistance sensor unit 150 may measure a change in the resistance of the three-phase coil, a current value of the high-voltage electricity for measurement, or a change in the voltage value of the high-voltage electricity for measurement. The insulation resistance sensor unit 150 may measure an insulation state between the three-phase power supply unit 140 and the drain pump unit 100 and an insulation state of the drain pump unit. Whether or not the drainage pump unit 100 is insulated can be determined through the measured value.

When the insulation resistance measurement is completed, high-voltage electricity for measurement may be discharged in a state in which the insulation resistance sensor unit 150 is electrically connected at reference numeral S28. If the high-voltage electricity for measurement remains in the drain pump unit 100, since there is a risk of electric shock, the high-voltage electricity for measurement stored in the drain pump unit 100 may be discharged.

When the discharge is completed, the insulation resistance sensor unit 150 is electrically disconnected, and the 3-phase power supply unit 140 or the terminal unit 130 is electrically connected to the drain pump unit 100 again at reference numeral S29.

At reference numeral S30, the above operation may be repeated for the line at both ends of the three-phase coil. When the work is completed, the insulation resistance measurement may be terminated, and may be terminated when the measurement of all three-phase coils is completed.

Referring to FIG. 5 , a method of measuring a water level sensor unit is illustrated.

In reference numeral S40 , the water level sensor unit may measure the water level of the underground power outlet.

Referring to FIG. 2 , a plurality of water level sensor units may be installed. It is possible to detect the amount of water through the water level sensor unit and determine whether to pump water by operating the pump by determining not to overload the pump.

The water level sensor unit may include a first water level sensor 111 unit 110a and a second water level sensor 102 unit 110b. The first water level sensor 111 unit 110a and the second water level sensor 102 unit 110b may be compared with each other to determine which sensor has an error.

The first water level sensor 111 unit 110a and the second water level sensor 102 unit 110b may include the first water level sensor 111 to the Nth water level sensor in order of installation height from the lower side to the upper side. have. Here, N may be a natural number of 2 or greater. It is not limited to the illustrated bar, and several water level sensors, such as three or four, may be installed. The operation method may be the same as when two are installed.

The first water level sensor 111 may be a sensor installed at the bottom, and may be mounted at the same height as the bottom of the first water level sensor 111 part 110a and the second water level sensor 102 part 110b. . The Nth water level sensor may be mounted at the same height as the first water level sensor 111 part 110a and the second water level sensor 102 part 110b.

The control unit 190 determines whether to drive only one of the first pump 101 and the second pump 102 and whether to drive both the first pump 101 and the second pump 102, the first water level sensor ( 111) to the Nth water level sensor, it may be determined according to whether or not water level measurement values are obtained from several sensors.

When water is detected by the Nth water level sensor attached to the top, the amount of water is quite large, so both the first pump 101 and the second pump 102 can be operated and an alarm can be generated in order to quickly pump out water. have. When water is not detected by the Nth water level sensor, the N−1 th water level sensor may be measured.

Before measuring the water level with the water level sensor unit, it is necessary to determine whether the water level sensor unit is normal or not. To this end, it is possible to determine whether or not the water level sensor unit is abnormal at reference numeral S41.

If the measured values of the respective water level sensors mounted at the same height of the first water level sensor 111 part 110a and the second water level sensor 102 part 110b are the same, it is normal, and if the measured values are different, it can be determined that it is abnormal. have. For example, since the first water level sensor 111 of the first water level sensor 111 part 110a and the first water level sensor 111 of the second water level sensor 102 part 110b are mounted at the same height, the same A measured value or a judgment value may be output. If each water level sensor shows a different output value, it may be determined that the water level sensor unit has failed.

Reference numeral S41 may determine whether the output values of each water level sensor unit are the same. If not identical, the sensor can be checked at reference sign S42. If the measured values are the same, since the water level sensor unit is normal, measurement of the fourth water level sensor 104 or the Nth water level sensor can be started at reference numeral S43. This is because the water level sensor at the same height is normal when the same output value comes out. If the measured values are not the same, a failure of the fourth water level sensor 104 or the Nth water level sensor may be recognized at reference numeral S42 and a failure message may be transmitted to the control unit 190 .

In reference numeral S43, the fourth water level sensor 104 mounted at the same height at the top of the first water level sensor 111 part 110a and the second water level sensor 102 part 110b detects that the water is full or the water level When is detected, step S44 may be performed. Step S44 of reference numeral may drive both the first pump 101 and the second pump 102 to quickly scoop out water and generate an alarm.

If there is no output value of the fourth water level sensor 104 at reference sign S43, the third water level sensor 103 can be accessed at reference sign S45. If there is an output value of the third water level sensor 103, since the water is filled up to the installation height of the third water level sensor 103, the first pump 101 and the second pump 102 do not generate an alarm at reference numeral S46. All of them can be driven to pump water quickly. Reference sign S46 is a mode for driving both pumps without generating an alarm, and reference sign S44 drives both pumps, but since there is a risk factor that water fills faster than the drainage capacity of the two pumps, the control unit 190 There is a difference in sending alert messages together.

If there is no output value of the third water level sensor 103 in reference sign S45, reference sign S47 may be performed. Reference sign S47 may determine whether there is an output value of the second water level sensor 102 . If there is an output value of reference numeral S47, since the water is filled up to the installation height of the second water level sensor 102, only the second pump 102 can be driven at reference numeral S48 to pump out water.

If there is no output value of the second water level sensor 102 at reference sign S47 , it may be determined whether there is an output value of the first water level sensor 111 at reference sign S49 . When there is an output value of the first water level sensor 111 at reference sign S49, only the first pump 101 may be driven at reference sign S50 to pump out water.

If there is no output value of the first water level sensor 111 in reference numeral S49, it can be recognized that there is no water in the underground power outlet and that the drainage pump unit 100 does not need to be operated. Therefore, the drainage pump unit 100 may not operate and the water level sensor unit may enter a standby state.

Meanwhile, referring to FIG. 6, the failure of the drainage pump unit 100 may not be limited to electrical abnormalities including coil disconnection (short circuit, open), short circuit (short circuit), poor contact, sudden change in resistance, and the like. have. Failure of the drainage pump unit 100 may include mechanical abnormalities including foreign matter attached to the impeller, damage of the impeller, arrival of life cycle of the bearing, damage of the bearing, and increase in frictional load.

As an embodiment of the present invention, an abnormality of the drainage pump unit 100 may be determined by measuring only one of the electrical abnormality and the mechanical abnormality, or by measuring both.

In order to measure a mechanical abnormality, a temperature/vibration sensor unit 180 for measuring temperature or vibration of the drainage pump unit 100 may be provided. For example, if a foreign substance is caught in the bearing, the temperature of the drainage pump unit 100 may rise, and if the impeller is broken, vibration may occur. The temperature/vibration sensor unit 180 may transmit to the control unit 190 whether the drainage pump unit 100 has a mechanical problem through a temperature value or a vibration value of the drainage pump unit.

On the other hand, when electrical and mechanical abnormalities are simultaneously measured, it is necessary to prioritize each variable. For example, see the following table.

electrical anomaly mechanical abnormality Case 1 X X Case 2 O X Case 3 X O Case 4 O O

For example, when the current/voltage sensor unit 160 and the temperature/vibration sensor unit 180 are mounted at the same time, the first case, the second case, and the third case are abnormal cases, and only the fourth case may be normal. have. If it is assumed that only the current/voltage sensor unit 160 is mounted, only the first case and the third case are determined to be abnormal, and the second case can be determined to be normal. On the other hand, assuming that only the temperature/vibration sensor unit 180 is mounted, the third case can also be determined to be normal. An embodiment in which only one of the sensor units 180 is mounted as well as an embodiment in which both are mounted may be included. When both the current/voltage sensor unit 160 and the temperature/vibration sensor unit 180 are mounted, abnormality determination can be made more accurately.

On the other hand, when both the current/voltage sensor unit 160 and the temperature/vibration sensor unit 180 are mounted, the current/voltage sensor unit 160 and the temperature/vibration sensor unit 180 are used to improve judgment accuracy. There is a need to establish measurement priorities or judgment priorities. The present invention may place electrical anomalies above mechanical anomalies. This is because mechanical anomalies are more likely to occur when the life cycle arrives after a certain period of time, and electrical anomalies are more likely to occur suddenly.

Referring to FIG. 6 , when an electrical abnormality occurs, the abnormality may be determined with priority regardless of whether a mechanical abnormality occurs.

Referring to FIG. 6 , a mutual relationship between the temperature/vibration sensor unit 180 and the current/voltage sensor unit 160 is shown. The temperature/vibration sensor unit 180 may be detached from the case of the drainage pump unit 100 . The temperature/vibration sensor unit 180 may measure whether the temperature rises when the drainage pump unit 100 is mechanically abnormal. Alternatively, mechanical abnormalities such as whether foreign substances are caught in the bearing or the like or wear or breakage of the bearing, motor shaft, etc., can be measured as a physical variable called the amount of vibration.

Reference numeral S60 is a mode for starting measurement of the temperature/vibration sensor unit 180 or the current/voltage sensor unit 160 .

Reference numeral S61 may determine whether the drainage pump unit 100 is in operation. When the drainage pump unit 100 is in operation, measurement of the temperature/vibration sensor unit 180 or the current/voltage sensor unit 160 may be started. This is because when the drainage pump unit 100 is in a stopped state, the current or voltage of the three-phase coil cannot be compared with other coils, and there is no rise in temperature or occurrence of vibration.

When the drainage pump unit 100 is in operation at reference sign S61, a measurement mode below reference sign S62 may be started. If the drainage pump unit 100 is in operation, it may return to step S60 so that water can be pumped out and measurement can be started.

A method of detecting an electrical abnormality by the current/voltage sensor unit 160 will be described.

As an example, the control unit 190 may determine whether current/voltage values deviate from a predetermined voltage range value. It is possible to determine whether the maximum value of the measured current/voltage value is between a predetermined current/voltage range value between a preset maximum current/voltage value and a minimum current/voltage value, and if it is out of the predetermined current/voltage range value , it can be determined that there is a circuit problem.

On the other hand, the present invention can provide a more advanced method than this measurement method.

That is, this logic checks whether there is an abnormality based on whether or not the electrical characteristics of each of the three-phase coils are the same. After the drainage pump unit 100 is installed in the underground power outlet, it is difficult for other workers to know the electrical specifications of the drainage pump unit 100. Therefore, even if the resistance or electrical characteristics of the individual drainage pump units 100 are measured, they may not have a reference value to compare whether or not an abnormality has occurred. In order to determine an electrical abnormality in the absence of a reference value, it may be the best method to measure whether or not the electrical characteristics of the three-phase coil for a specific drain pump unit 100 are the same, so the present invention uses this.

In reference numeral S62 , it is possible to measure whether the currents of the three-phase coils installed inside the drainage pump unit 100 are the same. If the currents are not the same, it may be determined that an electrical failure of the drain pump unit 100 occurs at reference sign S63.

If they are the same, it can be measured whether the voltages of the three-phase coils are the same at reference numeral S64. If the voltages are not the same, it can be determined that an electrical failure of the drainage pump unit 100 occurs at reference sign S65.

If they are the same, measurement of the temperature/vibration sensor unit 180 may be started at reference numeral S66. The measured temperature value is compared with the reference value, and if the reference value is exceeded, it can be determined that a mechanical abnormality has occurred in the drainage pump unit 100 using the temperature rise as a parameter. If the measured temperature value exceeds the reference value, it can be determined that a mechanical abnormality has occurred at reference sign S67.

If the temperature measurement value is less than or equal to the reference value, reference numeral S68 determines whether the vibration measurement value exceeds the reference value. If the vibration measurement value exceeds the reference value, it can be determined that a mechanical abnormality has occurred at reference sign S69.

If the vibration measurement value does not exceed the reference value, reference sign S70 is performed and it can be determined that there is no mechanical abnormality.

Reference numeral S80 is a step of stopping and inspecting the drainage pump unit 100 because a mechanical or electrical problem has occurred.

The present invention may be characterized in that the current/voltage sensor unit 160 measures the current or voltage applied to the drainage pump unit 100 and determines an electrical abnormality. On the other hand, it may be characterized that there is a priority of two sensors or a priority of a mechanical abnormality and an electrical abnormality. The present invention is characterized in that if there is an electrical abnormality, it is immediately determined as a failure, and when there is no electrical abnormality, a mechanical abnormality is measured.

When the control unit 190 determines that the current or voltage applied to each of the three-phase coils of the drain pump unit 100 is the same, the temperature/vibration sensor unit 180 measures the temperature or vibration of the drain pump unit 100. can If the temperature value and vibration value are abnormal, mechanical failure can be suspected, and if the current value and voltage value are abnormal, circuit failure can be suspected. It may be advantageous to first determine the circuit failure and measure the mechanical failure only when there is no circuit failure.

In the present invention, as shown in FIG. 6 , it is possible to quickly check and check whether or not the drainage pump unit 100 has a failure by first checking the circuit failure.

If there is an abnormality in the temperature value, a suction port, sludge, foreign matter, damage to the impeller, etc. may be suspected, and the motor of the drainage pump unit 100 may be checked after the pump is stopped.

If there is no abnormality in the temperature value, it can be checked whether there is no abnormality in the vibration value, which is the next step.

If there is an abnormality in the vibration value, the inlet, sludge, foreign matter, damage to the impeller, etc. may be suspected, and the motor of the drainage pump unit 100 may be checked after the pump is stopped.

100 ... drainage pump unit 101 ... first pump
102 ... second pump 110a ... first water level sensor unit
110b ... second water level sensor unit 111 ... first water level sensor
102 ... second water level sensor 103 ... third water level sensor
104 ... fourth water level sensor 120 ... power cable
130 ... terminal portion 131 ... detachable portion
140...3-phase power unit 142...power switch
150 ... insulation resistance sensor unit 160 ... current / voltage sensor unit
180 ... temperature / vibration sensor unit 190 ... control unit
W...water level reading

Claims (8)

A drainage pump unit that pumps out water from underground power outlets;
a plurality of water level sensor units measuring water level information of the underground power outlet;
Current/voltage sensor unit for measuring the current or voltage applied to the drainage pump unit
an insulation resistance sensor unit measuring insulation resistance of the drainage pump unit;
a temperature/vibration sensor unit measuring temperature or vibration of the drainage pump unit;
a control unit controlling an operation of the drainage pump unit when a measured value is obtained from at least one of the water level sensor unit, the current/voltage sensor unit, the insulation resistance sensor unit, and the temperature/vibration sensor unit; including,
The control unit obtains a measurement value of the water level sensor unit with priority over a measurement value of at least one of the current/voltage sensor unit, the insulation resistance sensor unit, and the temperature/vibration sensor unit, and the current/voltage sensor unit according to the measurement value of the water level sensor unit / Determines whether at least one of the voltage sensor unit, the insulation resistance sensor unit, and the temperature/vibration sensor unit has started to measure,
The drainage pump unit includes a first pump and a second pump,
The water level sensor unit includes a first water level sensor unit and a second water level sensor unit,
The first water level sensor unit and the second water level sensor unit include first to Nth water level sensors in order of installation heights from a lower side to an upper side (where N is a natural number of 2 or more),
The first water level sensor is mounted at the same height at the lowermost end of the first water level sensor unit and the second water level sensor unit,
The Nth water level sensor is mounted at the same height as the first water level sensor part and the second water level sensor part;
The water level sensor unit generates an output value in the form of on / off,
If the measured values of the respective water level sensors mounted at the same height of the first water level sensor unit and the second water level sensor unit are the same, it is determined to be normal, and if the measured values are different, it is determined to be abnormal;
When both of the N water level sensors mounted at the same height of the highest position of the first water level sensor unit and the second water level sensor unit are on, both the first pump and the second pump are operated, and an alarm is generated. , The first pump and the second pump are operated until water is not detected by the N water level sensor,
When water is not detected by the N water level sensor and both of the first and second water level sensors are on from the N-1 water level sensor mounted at the same height of the highest position of the first and second water level sensors, the first pump and Both the second pumps are operated, and the first pump and the second pump are operated until water is not detected by the N-1 water level sensor,
When the water level measurement value is output from the water level sensor unit, the drain pump unit is driven, the current/voltage sensor unit measures the current or voltage applied to the drain pump unit, and the temperature/vibration sensor unit measures the temperature of the drain pump unit. Or measure the vibration, and the measurement of the insulation resistance sensor unit is stopped,
When the water level measurement value is not output from the water level sensor unit, operations of the drain pump unit, the current/voltage sensor unit, and the temperature/vibration sensor unit are stopped, and the insulation resistance sensor measures the insulation resistance of the drain pump unit. do,
A three-phase power supply unit for supplying power to the power cable of the drain pump unit is provided,
When measuring the insulation resistance sensor unit, the three-phase power supply unit is turned off,
The insulation resistance sensor unit measures an electrical abnormality between the outside of the drainage pump unit and the three-phase power supply unit,
The current/voltage sensor unit measures electrical abnormalities such as a three-phase coil, a brush, a driving circuit, and other electric elements inside the drain pump unit provided in the drain pump unit.
delete According to claim 1,
When the control unit checks an abnormality in at least one of the current, voltage, temperature, or vibration of the drain pump unit, the electrical abnormality check is first performed by the current/voltage sensor unit, and then, when there is no electrical abnormality, the electrical abnormality is checked. A drainage pump unit management device that checks mechanical abnormalities by the temperature/vibration sensor unit.
According to claim 1,
The controller determines whether to drive only one of the first pump and the second pump and whether to drive both the first pump and the second pump by using several sensors from among the first water level sensor to the Nth water level sensor. Drainage pump unit management device that determines whether or not water level readings are obtained from
According to claim 1,
A terminal unit connecting the power cable to the three-phase power unit is provided,
A detachable portion for attaching and detaching the power cable and the electrical connection of the terminal portion is provided,
After the electrical connection of the power cable and the terminal unit is disconnected by the detachable unit, the insulation resistance sensor unit or the current / voltage sensor unit is connected to the position where the electrical connection is disconnected,
When the measurement of the insulation resistance sensor unit or the current / voltage sensor unit is completed, the insulation resistance sensor unit or the current / voltage sensor unit is electrically separated from the power cable and the terminal unit.
delete According to claim 1,
When the insulation resistance sensor unit measures the insulation resistance of the drainage pump unit,
The electrical connection of the three-phase power supply unit supplying power to the drain pump unit is disconnected,
The drain pump unit is electrically connected to the insulation resistance sensor unit by replacing the three-phase power supply unit,
The insulation resistance sensor unit supplies high-voltage electricity for measurement to the drain pump unit and then measures a change in insulation resistance value of the drain pump unit or the three-phase power supply unit or measures a voltage change of the high-voltage electricity for measurement,
When the measurement of the insulation resistance sensor unit is completed, the electrical connection of the insulation resistance sensor unit from the drain pump unit is released, and the three-phase power supply unit or terminal unit is electrically connected to the drain pump unit again.
According to claim 1,
The drainage pump unit has a three-phase coil to which power is input from the three-phase power supply unit,
The control unit,
First, it is determined whether the current or voltage applied to each of the three-phase coils of the drainage pump unit measured by the current / voltage sensor unit is the same,
If the current or voltage applied to each of the three-phase coils is the same, the temperature / vibration sensor unit measures the temperature or vibration of the drain pump unit.

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