Deicing submersible pump control device

Abstract

The invention belongs to the field of submersible pump control, and particularly relates to a deicing submersible pump control device which is used for solving the problem that the surface of a water area of a hydraulic structure is iced. The deicing submersible pump control device comprises an acquisition unit, an in-situ PLC control unit, an external driving unit, a driving power supply, a cloud storage unit and a user terminal, submersible pump state data and driving power supply data are acquired in real time through the acquisition unit to monitor the submersible pump; when state data and driving power data of the submersible pump are abnormal due to faults such as stalling and power failure of the submersible pump, the device automatically stops power supply of the submersible pump and pushes information to a user terminal, and the device also realizes monitoring of the underwater depth of the submersible pump and automatically adjusts the underwater depth of the submersible pump along with the water level; the device is simple and reliable in structure, and maintenance personnel can conveniently grasp submersible pump state data and driving power supply data at any time through the user terminal and perform state judgment timely according to the submersible pump state data and the driving power supply data.

Description

Technical Field

[0001] This application belongs to the field of submersible pump control, and particularly relates to a de-icing submersible pump control device. Background Art

[0002] In northern regions, de-icing devices for spillway gates of hydropower plants mostly use the method of submersible pumps in flowing water to prevent the water surface from freezing and protect hydraulic structures from freezing damage. Existing submersible pump controls are mostly manual, and manual inspections are carried out in the morning and evening to ensure that the submersible pumps rotate for 24 hours a day. However, the continuous and uninterrupted rotation of the submersible pumps may cause jamming and damage. Moreover, if the pump fails during non-inspection periods, it is very likely to cause the water surface to freeze, affecting the safety status of hydraulic structures. Summary of the Invention

[0003] A de-icing submersible pump control device is proposed to solve the problem of ice formation on the water surface of hydraulic structures in the prior art.

[0004] A de-icing submersible pump control device includes a collection unit, a local PLC control unit, a peripheral drive unit, a drive power supply, a cloud storage unit, and a user terminal. The drive power supply is used to supply power to the peripheral drive unit and the submersible pump.

[0005] The collection unit is used to obtain submersible pump status data and drive power supply data, and send the submersible pump status data and drive power supply data to the local PLC control unit.

[0006] The local PLC control unit is used to preprocess the received submersible pump status data and drive power supply data to obtain processed submersible pump status data and processed drive power supply data, and send the processed submersible pump status data and processed drive power supply data to the user terminal and the cloud storage unit.

[0007] The local PLC control unit is also used to compare the processed submersible pump status data and processed drive power supply data with the set corresponding protection threshold values respectively to obtain comparison results, control the drive power supply to stop supplying power to the submersible pump according to the comparison results, control the lifting of the submersible pump through the peripheral drive unit according to the comparison results, and generate an early warning signal according to the comparison results and send the early warning signal to the user terminal.

[0008] The local PLC control unit is also used to control the start and stop of the submersible pump according to the set start duration and intermittent stop duration.

[0009] The user terminal is used to display the received processed submersible pump status data and processed drive power supply data, and give an early warning according to the received early warning signal. The cloud storage unit is used to store the received processed submersible pump status data and processed drive power supply data.

[0010] Advantages of the present invention: The de-icing submersible pump control device of the present application monitors the submersible pump by acquiring the submersible pump status data and the driving power supply data in real time through the acquisition unit; when the submersible pump status data and the driving power supply data are abnormal due to faults such as the submersible pump being blocked or power failure, the device automatically stops supplying power to the submersible pump and pushes information to the user terminal, facilitating the timely handling of faults; the device also monitors the submersible depth of the submersible pump and automatically adjusts the submersible depth of the submersible pump with the water level. The structure is simple and reliable, facilitating maintenance personnel to master the submersible pump status data and the driving power supply data at any time through the user terminal and make status judgments in a timely manner according to the submersible pump status data and the driving power supply data. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of a de-icing submersible pump control device according to a specific embodiment of the present application;

[0012] Figure 2 It is a schematic structural diagram of an external drive unit according to a specific embodiment of the present application. Specific Embodiments

[0013] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. Herein, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.

[0014] A de-icing submersible pump control device includes an acquisition unit, a local PLC control unit, an external drive unit, a driving power supply, a cloud storage unit, and a user terminal; the driving power supply is used to supply power to the external drive unit and the submersible pump;

[0015] The acquisition unit is used to acquire the submersible pump status data and the driving power supply data, and send the submersible pump status data and the driving power supply data to the local PLC control unit;

[0016] The local PLC control unit is used to preprocess the received submersible pump status data and driving power supply data to obtain the processed submersible pump status data and the processed driving power supply data, and send the processed submersible pump status data and the processed driving power supply data to the user terminal and the cloud storage unit;

[0017] The local PLC control unit is also used to compare the processed submersible pump status data and the processed driving power supply data with the set corresponding protection set values respectively to obtain comparison results, control the driving power supply to stop supplying power to the submersible pump according to the comparison results, control the lifting of the submersible pump through the external drive unit according to the comparison results, and generate an early warning signal according to the comparison results and send the early warning signal to the user terminal;

[0018] The on-site PLC control unit is also used to control the start and stop of the submersible pump according to the set start duration and intermittent stop duration;

[0019] The user terminal is used to display the processed submersible pump status data and processed drive power data received, and give an alarm according to the received warning signal; the cloud storage unit is used to store the processed submersible pump status data and processed drive power data received.

[0020] Specifically, the acquisition unit collects operation parameters including submersible pump status data and drive power data, and after programming the process control of the PLC and editing in C language, obtains the on-site PLC control unit applicable to this device; the on-site PLC control unit preprocesses the received submersible pump status data and drive power data, and the preprocessing includes methods such as proportional coefficient operation, rounding operation, and decimal operation. In actual operation, appropriate preprocessing methods can be selected according to specific situations to obtain the processed submersible pump status data and processed drive power data corresponding to the submersible pump status data and drive power data respectively; the on-site PLC control unit transmits the processed submersible pump status data and processed drive power data to the cloud storage unit and the user terminal in real time through the 4G network or LAN network, interacts with the cloud storage unit and the user terminal to realize data upload and control distribution, and realizes the online browsing, historical data query and remote control functions of the data by the user terminal; the on-site PLC control unit is the core unit of the device, can operate independently, and realizes the protection control of each electrical equipment; the cloud storage unit mainly performs cloud storage of data, and interacts with the user terminal to realize real-time data monitoring, historical data query and remote device control.

[0021] The deicing submersible pump control device can be equipped with a cloud server to realize the management and distribution of user permissions, allocate different control permissions according to the user permission level, and allocate different permission functions for different user groups such as only browsing, can control, can change set values, etc. The cloud server uses a dedicated port, installs a gateway firewall, and adopts the device ID verification mode to ensure data security.

[0022] The user terminal provides a visual interface for the user. Through interface configuration, the end user can realize the real-time online monitoring and remote operation control of the power distribution equipment, master the operation status and operation parameters of the equipment in real time, can perform real-time monitoring and information push at any time, and can also form a monitoring center. After configuration, realize large-screen centralized monitoring; the user terminal is a mobile phone APP or a PC terminal.

[0023] Furthermore, the acquisition unit includes a current sensor, a voltage sensor and a water level transmitter;

[0024] The submersible pump status data includes the submersible pump current signal and the submersible pump water inlet depth signal, and the drive power data includes the drive power voltage signal;

[0025] The current sensor is used to acquire the current signal of the submersible pump and send the current signal of the submersible pump to the PLC control unit; the voltage sensor is used to acquire the driving power supply voltage signal and send the driving power supply voltage signal to the PLC control unit; the water level transmitter is used to acquire the submersible pump water inlet depth signal and send the submersible pump water inlet depth signal to the PLC control unit.

[0026] Specifically, to meet the actual detection needs, a temperature transmitter can be added to the acquisition unit to acquire the outdoor ambient temperature, and the temperature transmitter sends the acquired outdoor ambient temperature to the PLC control unit.

[0027] Further, the method for the on-site PLC control unit to preprocess the received submersible pump status data and driving power supply data to obtain the processed submersible pump status data and processed driving power supply data is as follows:

[0028] The on-site PLC control unit preprocesses the submersible pump current signal, driving power supply voltage signal, and submersible pump water inlet depth signal respectively to obtain the corresponding submersible pump current value, submersible pump water inlet depth value, and driving power supply voltage value.

[0029] Specifically, the on-site PLC control unit can perform processing such as analog-to-digital conversion, digital-to-analog conversion, proportional coefficient operation, rounding operation, and decimal operation on the received submersible pump current signal, power supply voltage signal, submersible pump water inlet depth signal, and temperature signal, etc., to obtain the corresponding submersible pump current value, submersible pump water inlet depth value, driving power supply voltage value, and temperature value; and send the obtained submersible pump current value, submersible pump water inlet depth value, driving power supply voltage value, and temperature value to the user terminal and the cloud storage unit.

[0030] Further, the method for the on-site PLC control unit to compare the processed submersible pump status data and driving power supply data with the set corresponding protection set values respectively to obtain a comparison result and control the on-off of the submersible pump power supply according to the comparison result is as follows:

[0031] The on-site PLC control unit compares the submersible pump current value with the set maximum current protection set value and the set minimum current protection set value respectively, and compares the driving voltage value with the set maximum voltage protection set value and the set minimum voltage protection set value respectively. If the submersible pump current value is greater than the set maximum current protection set value, the submersible pump current value is less than the set minimum current protection set value, the driving voltage value is greater than the set maximum voltage protection set value, or the driving voltage value is less than the set minimum voltage protection set value, an operation fault signal and a warning signal are generated, and the driving power supply is controlled to stop supplying power to the submersible pump according to the operation fault signal, and the warning signal is sent to the user terminal.

[0032] Further, the on-site PLC control unit compares the submersible pump current value with the set maximum current protection value and the set minimum current protection value respectively. If the submersible pump current value is greater than the set maximum current protection value or the submersible pump current value is less than the set minimum current protection value, an operation fault signal and a warning signal are generated. The drive power supply is controlled to stop supplying power to the submersible pump according to the operation fault signal, and the warning signal is sent to the user terminal. The on-site PLC control unit compares the drive voltage value with the set maximum voltage protection value and the set minimum voltage protection value respectively. If the drive voltage value is greater than the set maximum voltage protection value or the drive voltage value is less than the set minimum voltage protection value, an operation fault signal and a warning signal are generated. The drive power supply is controlled to stop supplying power to the submersible pump according to the operation fault signal, and the warning signal is sent to the user terminal.

[0033] Further, the on-site PLC control unit compares the processed submersible pump status data with the set corresponding protection value to obtain a comparison result. The method for controlling the lifting of the submersible pump by the peripheral drive unit according to the comparison result is as follows:

[0034] The on-site PLC control unit compares the submersible pump water entry depth value with the set depth value. If the submersible pump water entry depth value is greater than the set depth value, a submersible pump rising signal is generated and sent to the peripheral drive unit. The peripheral drive unit controls the submersible pump to rise according to the received submersible pump rising signal. If the submersible pump water entry depth value is less than the set depth value, a submersible pump falling signal is generated and sent to the peripheral drive unit. The peripheral drive unit controls the submersible pump to fall according to the received submersible pump falling signal.

[0035] Specifically, the set depth value is 10 cm. When the submersible pump water entry depth value is greater than 10 cm, the on-site PLC control unit controls the submersible pump to rise. When the submersible pump water entry depth value is less than 10 cm, the on-site PLC control unit controls the submersible pump to fall, realizing automatic adjustment of the submersible pump water entry depth with the rise and fall of the water level and controlling the submersible pump water entry depth to meet the requirements.

[0036] Further, the peripheral drive unit includes a lifting motor 1, a reducer 2, a sling reel 3, a sling 4, and an anti-twist plate 5;

[0037] The output shaft of the lifting motor 1 is connected to the input shaft of the reducer 2. The output shaft of the reducer 2 is connected to the sling reel 3, and the output shaft of the reducer 2 drives the sling reel 3 to rotate. One end of the sling 4 is fixed on the sling reel 3, the other end of the sling 4 is connected to one end of the anti-twist plate 5, and the other end of the anti-twist plate 5 is connected to the submersible pump 6. The rotation of the sling reel 3 changes the elongation length of the sling 4 and simultaneously changes the water entry depth of the submersible pump 6. The anti-twist plate is used to prevent the submersible pump 6 from displacing in the horizontal or vertical direction after starting. The structural schematic diagram of the peripheral drive unit is as Figure 2 shown.

[0038] Specifically, the submersible pump 6 is connected to the other end of the anti-strangulation plate 5, and the anti-strangulation plate 5 fixes the submersible pump 6 to prevent the submersible pump 6 from being displaced in the horizontal or vertical direction due to the force generated by the rotation after the submersible pump 6 is started, thereby improving the system stability and ensuring the smooth operation of the submersible pump 6.

[0039] Furthermore, the method for the peripheral drive unit to control the ascent of the submersible pump according to the received submersible pump ascent signal includes: the lifting motor controls the output shaft of the lifting motor 1 to rotate forward according to the received submersible pump ascent signal, the output shaft of the lifting motor 1 drives the input shaft of the reducer 2 to rotate, the reducer 2 drives the output shaft of the reducer 2 to rotate after decelerating the input shaft of the reducer 2, the output shaft of the reducer 2 drives the sling shaft 3 to rotate forward to reduce the elongation length of the sling 4, thereby rising the anti-entanglement plate 5 and the submersible pump 6.

[0040] Furthermore, the method for the peripheral drive unit to control the descent of the submersible pump according to the received submersible pump descent signal includes: the lifting motor 1 controls the output shaft of the lifting motor 1 to rotate in the opposite direction according to the received submersible pump descent signal, the output shaft of the lifting motor 1 drives the input shaft of the reducer 2 to rotate, the reducer 2 drives the output shaft of the reducer 2 to rotate after reducing the speed of the reducer 2 input shaft, the output shaft of the reducer 2 drives the sling shaft 3 to rotate in the opposite direction to increase the elongation length of the sling 4, so that the anti-strangulation plate 5 and the submersible pump are lowered.

[0041] Specifically, the set depth value is 10cm. With the natural change of the water level in the reservoir area, the water level transmitter collects the water entry depth of the submersible pump. When the water entry depth of the submersible pump is greater than the set depth value of 10cm, the local PLC control unit sends a high-speed pulse to the lifting motor, and the lifting motor rotates forward. The reducer connected to the lifting motor and the sling reel, sling and anti-twist plate pull the suspended submersible pump up; when the water entry depth of the submersible pump is less than the set depth value of 10cm, the driver controls the lifting motor to reverse, and the reducer connected to the lifting motor and the sling reel, sling and anti-twist plate pull the suspended submersible pump down; and then the water entry depth of the submersible pump is automatically adjusted within a fixed value range to keep the water entry depth of the water pump and the water surface of the reservoir at a constant value. The local PLC control unit performs calculations and output controls on the direction and amplitude of the lifting and lowering movement according to the water entry depth of the submersible pump.

[0042] In order to improve the de-icing effect in the water area of ​​hydraulic structures, multiple de-icing submersible pumps are set in the water area in actual operation. In order to save equipment costs, two adjacent submersible pumps are connected to the same anti-twisting plate.

[0043] Furthermore, the method for the local PLC control unit to control the start and stop of the submersible pump according to the set start time and stop time includes:

[0044] Set the start duration and the interval stop duration of the submersible pump. The on-site PLC control unit controls the submersible pump to continuously start for the set start duration of the submersible pump, and controls the submersible pump to continuously shut down for the set interval stop duration after the start duration of the submersible pump ends; control the submersible pump to alternately repeat starting and shutting down according to the set start duration and interval stop duration of the submersible pump.

[0045] Specifically, set the working mode of intermittent stop of the submersible pump, set the start duration of the submersible pump to 10 minutes, and the interval stop duration to 8 minutes; the on-site PLC control unit controls the submersible pump to run for 10 minutes, and controls the submersible pump to stop for 8 minutes after the submersible pump runs for 10 minutes, then runs for 10 minutes again, stops for 8 minutes, and executes in a cycle; the start duration and the interval stop duration of the submersible pump can be set through the user terminal, and the user terminal sends the set start duration and interval stop duration of the submersible pump to the on-site PLC control unit; the start duration and the interval stop duration of the submersible pump can also be automatically adjusted according to the outdoor temperature. In the cold winter, increase the start duration of the submersible pump and reduce the interval stop duration of the submersible pump. In the early winter or in spring when the temperature is not very cold, increase the interval stop duration of the submersible pump, which will reduce the running duration of the submersible pump, thereby reducing the power consumption of the submersible pump and saving energy.

[0046] Furthermore, the peripheral drive unit further includes a contactor;

[0047] The method for the on-site PLC control unit to control the submersible pump to continuously start is: the on-site PLC control unit controls the contactor to be energized, the contactor closes, and the submersible pump starts;

[0048] The method for the on-site PLC control unit to control the submersible pump to continuously shut down is: the on-site PLC control unit controls the contactor to be de-energized, the contactor opens, and the submersible pump shuts down.

[0049] Furthermore, the on-site PLC control unit controls the start and shutdown of the submersible pump by controlling the opening and closing of the contactor.

[0050] Although the present invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not depart from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and the features described herein can be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a single embodiment can be used in other described embodiments.

Claims

1. An ice-removing submersible pump control device, characterized in that: It includes a collection unit, a local PLC control unit, a peripheral drive unit, a drive power supply, a cloud storage unit and a user terminal; the drive power supply is used to supply power to the peripheral drive unit and the submersible pump; The collection unit is used to obtain the submersible pump status data and the drive power supply data, and send the submersible pump status data and the drive power supply data to the local PLC control unit; The local PLC control unit is used to preprocess the received submersible pump status data and drive power supply data to obtain the processed submersible pump status data and the processed drive power supply data, and send the processed submersible pump status data and the processed drive power supply data to the user terminal and the cloud storage unit; The local PLC control unit is also used to compare the processed submersible pump status data and the processed drive power supply data with the set corresponding protection set values respectively to obtain comparison results, control the drive power supply to stop supplying power to the submersible pump according to the comparison results, control the lifting of the submersible pump through the peripheral drive unit according to the comparison results, and generate a warning signal according to the comparison results and send the warning signal to the user terminal; The local PLC control unit is also used to control the start and stop of the submersible pump according to the set start duration and intermittent stop duration; The user terminal is used to display the received processed submersible pump status data and the processed drive power supply data, and give a warning according to the received warning signal; The cloud storage unit is used to store the received processed submersible pump status data and the processed drive power supply data.

2. The de-icing submersible pump control device according to claim 1, characterized in that: The collection unit includes a current sensor, a voltage sensor and a water level transmitter; The submersible pump status data includes the submersible pump current signal and the submersible pump water inlet depth signal, and the drive power supply data includes the drive power supply voltage signal; The current sensor is used to obtain the submersible pump current signal and send the submersible pump current signal to the PLC control unit; the voltage sensor is used to obtain the drive power supply voltage signal and send the drive power supply voltage signal to the PLC control unit; the water level transmitter is used to obtain the submersible pump water inlet depth signal and send the submersible pump water inlet depth signal to the PLC control unit.

3. The ice removal submersible pump control device according to claim 1, characterized in that: The method for the local PLC control unit to preprocess the received submersible pump status data and drive power supply data to obtain the processed submersible pump status data and the processed drive power supply data is as follows: The local PLC control unit preprocesses the submersible pump current signal, the drive power supply voltage signal and the submersible pump water inlet depth signal respectively to obtain the corresponding submersible pump current value, the submersible pump water inlet depth value and the drive power supply voltage value.

4. The de-icing submersible pump control device according to claim 3, characterized in that: The method for the local PLC control unit to compare the processed submersible pump status data and the processed drive power supply data with the set corresponding protection set values respectively to obtain comparison results and control the on-off of the submersible pump power supply according to the comparison results is as follows: The on-site PLC control unit compares the submersible pump current value with the set maximum current protection value and the set minimum current protection value respectively, and compares the drive voltage value with the set maximum voltage protection value and the set minimum voltage protection value respectively. If the submersible pump current value is greater than the set maximum current protection value, the submersible pump current value is less than the set minimum current protection value, the drive voltage value is greater than the set maximum voltage protection value, or the drive voltage value is less than the set minimum voltage protection value, an operation fault signal and a warning signal are generated. The drive power supply is controlled to stop supplying power to the submersible pump according to the operation fault signal, and the warning signal is sent to the user terminal.

5. The de-icing submersible pump control device according to claim 4, characterized in that: The method for the on-site PLC control unit to compare the processed submersible pump status data with the set corresponding protection value to obtain a comparison result and control the lifting of the submersible pump through the peripheral drive unit is as follows: The on-site PLC control unit compares the submersible pump water entry depth value with the set depth value. If the submersible pump water entry depth value is greater than the set depth value, a submersible pump rising signal is generated and sent to the peripheral drive unit. The peripheral drive unit controls the submersible pump to rise according to the received submersible pump rising signal. If the submersible pump water entry depth value is less than the set depth value, a submersible pump falling signal is generated and sent to the peripheral drive unit. The peripheral drive unit controls the submersible pump to fall according to the received submersible pump falling signal.

6. The deicing submersible pump control device according to claim 5, characterized in that: The peripheral drive unit includes a lifting motor, a reducer, a sling reel, a sling, and an anti-twist plate; The output shaft of the lifting motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the sling reel. The output shaft of the reducer drives the sling reel to rotate. One end of the sling is fixed on the sling reel, and the other end of the sling is connected to one end of the anti-twist plate. The other end of the anti-twist plate is connected to the submersible pump. The rotation of the sling reel changes the elongation length of the sling and simultaneously changes the water entry depth of the submersible pump. The anti-twist plate is used to prevent the submersible pump from displacing in the horizontal or vertical direction after starting.

7. The ice removal submersible pump control device according to claim 6, characterized in that: The method for the peripheral drive unit to control the submersible pump to rise according to the received submersible pump rising signal includes: the lifting motor controls the output shaft of the lifting motor to rotate forward according to the received submersible pump rising signal. The output shaft of the lifting motor drives the input shaft of the reducer to rotate. The reducer decelerates the input shaft of the reducer and then drives the output shaft of the reducer to rotate. The output shaft of the reducer drives the sling rotating shaft to rotate forward to reduce the elongation length of the sling, causing the anti-twist plate and the submersible pump to rise.

8. The ice removal submersible pump control device according to claim 7, characterized in that: The method for the peripheral drive unit to control the submersible pump to fall according to the received submersible pump falling signal includes: the lifting motor controls the output shaft of the lifting motor to rotate reversely according to the received submersible pump falling signal. The output shaft of the lifting motor drives the input shaft of the reducer to rotate. The reducer decelerates the input shaft of the reducer and then drives the output shaft of the reducer to rotate. The output shaft of the reducer drives the sling rotating shaft to rotate reversely to increase the elongation length of the sling, causing the anti-twist plate and the submersible pump to fall.

9. The ice removal submersible pump control device according to claim 8, wherein: The method for the on-site PLC control unit to control the start and stop of the submersible pump according to the set start duration and intermittent stop duration includes: Set the start duration and the interval stop duration of the submersible pump. The on-site PLC control unit controls the submersible pump to continuously start for the set start duration of the submersible pump, and controls the submersible pump to continuously stop for the set interval stop duration of the submersible pump after the start duration of the submersible pump ends; control the submersible pump to alternately repeat starting and stopping according to the set start duration and interval stop duration of the submersible pump.

10. The ice removal submersible pump control device according to claim 9, characterized in that: The peripheral drive unit further includes a contactor; The method for the on-site PLC control unit to control the submersible pump to continuously start is: the on-site PLC control unit controls the contactor to be energized, the contactor closes, and the submersible pump starts; The method for the on-site PLC control unit to control the submersible pump to continuously stop is: the on-site PLC control unit controls the contactor to be de-energized, the contactor opens, and the submersible pump stops.

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