KR-20260064902-A - SYSTEM FOR MONITORING LEVEL SENSOR OF PUMP

KR20260064902AKR 20260064902 AKR20260064902 AKR 20260064902AKR-20260064902-A

Abstract

The present invention relates to a level sensor monitoring system, and more specifically, to a level sensor monitoring system for a pump for monitoring the status of a level sensor installed together with a pump in a water tank such as a drainage facility and diagnosing a fault. A level sensor monitoring system for a pump according to the present invention comprises: a pump unit including a first pump and a second pump installed together in a water tank; a pump control unit that checks whether each of the first pump and the second pump is operating and controls the operation of each of the first pump and the second pump; a level sensor unit including a first level sensor to a fourth level sensor installed at an interval in the vertical direction within the water tank, which rotates upward by buoyancy to detect the water level and generate an operation signal for the first pump and the second pump, wherein the fourth level sensor is installed at the uppermost position and, when the water level reaches the height of the fourth level sensor, operates the first pump and the second pump together and generates a fourth operation signal indicating a high water level state; a level sensor test unit that performs a test operation to forcibly rotate the fourth level sensor upward at a preset periodic interval to periodically check whether the fourth level sensor generates the fourth operation signal normally; and a level sensor fault determination unit that monitors whether each of the first to fourth level sensors is operating and determines whether the fourth operation signal is generated normally during the test operation of the level sensor test unit. and includes a level sensor fault notification unit that, based on the judgment result of the level sensor fault judgment unit, if the fourth operation signal is abnormal, alarms and displays that the fourth level sensor is faulty.

Inventors

정지철

Assignees

주식회사 명성이엔티

Dates

Publication Date: 20260508
Application Date: 20241030

Claims (11)

A pump unit including a first pump and a second pump installed together in a single water tank; A pump control unit that checks whether the first pump and the second pump are each operating and controls the operation of the first pump and the second pump, respectively; A level sensor unit comprising a first to a fourth level sensor installed at an interval in the vertical direction within the above water tank, which rotates upward by buoyancy to detect the water level and generate an operation signal for the first pump and the second pump, wherein the fourth level sensor is installed at the uppermost position and, when the water level reaches the height of the fourth level sensor, operates the first pump and the second pump together and generates a fourth operation signal indicating a high water level state; A level sensor test unit that performs a test operation to forcibly rotate the fourth level sensor upward at a preset periodic interval to periodically check whether the fourth level sensor normally generates the fourth operation signal; A level sensor fault determination unit that monitors whether each of the first to fourth level sensors is operating and determines whether the fourth operation signal is generated normally during the test operation of the level sensor test unit; and A level sensor fault notification unit that, based on the judgment result of the level sensor fault judgment unit, if the fourth operation signal is abnormal, alarms and displays that the fourth level sensor is faulty; A level sensor monitoring system for a pump including
In paragraph 1, The first level sensor is installed at the bottom and generates a first operation signal to stop the first pump and the second pump when the water level is lower than the height of the first level sensor, and The second level sensor is installed above the first level sensor, and when the water level reaches the height of the second level sensor, it generates a second operation signal to operate the first pump, and The third level sensor is installed above the second level sensor, and when the water level reaches the height of the third level sensor, it generates a third operation signal to operate the second pump, and when the water level is lower than the height of the third level sensor, it stops generating the third operation signal to stop the second pump. A level sensor monitoring system for a pump, characterized in that the fourth level sensor stops generating the fourth operation signal and stops the high-level condition notification when the water level is lower than the height of the fourth level sensor.
In paragraph 2, The above level sensor test unit is, A test tank surrounding the above-mentioned fourth level sensor, with the upper side open and a part of the lower side open, and An opening/closing member provided in the lower side opening of the above-mentioned test tank, which blocks the lower side opening during the fourth level sensor test operation and opens the lower side opening under normal circumstances, and A level sensor monitoring system for a pump, characterized by including a water level control member that supplies or removes water to the test tank to raise or lower the water level of the test tank during the fourth level sensor test operation.
In paragraph 3, A level sensor monitoring system for a pump, characterized in that when the above level sensor test unit reaches the above certain cycle, the first pump and the second pump operate together, and when the third operation signal and the fourth operation signal occur together, the test operation is not performed and the system proceeds to the next cycle.
In paragraph 3, During the test operation of the level sensor test unit, the level sensor fault determination unit monitors whether the fourth operation signal is generated from the fourth level sensor, and A level sensor monitoring system for a pump, characterized in that the pump control unit controls the first pump and the second pump not to operate by the fourth operation signal generated by the test operation of the level sensor test unit.
In paragraph 2, The above level sensor fault determination unit is, By monitoring the operating status of the first to fourth level sensors, In a state where the third operation signal is not generated, the case where the fourth operation signal is continuously generated for a preset first period or longer is stored as first fault prediction data, and In the state where the third operation signal is generated, if the fourth operation signal does not continuously occur for more than a preset second period, it is stored as second fault prediction data. A level sensor monitoring system for a pump characterized by determining whether a failure has occurred by comparing the test operation result of the level sensor test unit with either the first failure prediction data or the second failure prediction data.
In paragraph 2, The pump control unit is pre-set to control the output of the first pump and the second pump from a first stage to a third stage, and When the above third operation signal is generated, the outputs of the first pump and the second pump are controlled to the second stage, and When the above fourth operation signal is generated, the outputs of the first pump and the second pump are controlled by raising them to the third stage, A level sensor monitoring system for a pump, characterized in that when the generation of the fourth operation signal is determined by the level sensor fault determination unit to be a fault of the fourth level sensor, the outputs of the first pump and the second pump are controlled by lowering them from the third stage to the second stage, and subsequently, if the third operation signal is not generated, the output of the first pump is controlled by lowering it to the first stage and stopping the operation of the second pump.
In Paragraph 7, A level sensor monitoring system for a pump, characterized in that when the failure of the fourth operation signal is determined by the level sensor failure determination unit to be a failure of the fourth level sensor, the outputs of the first pump and the second pump are controlled to be sequentially raised from the second stage to the third stage with a time interval when the third operation signal is generated, and thereafter, when the third operation signal is not generated, the output of the first pump is controlled to be lowered to the first stage and the operation of the second pump is stopped.
In paragraph 1, The system further includes a level sensor reset unit that resets the power supplied to the first to fourth level sensors when a preset first time elapses after the alarm starts in the level sensor fault notification unit. A level sensor monitoring system for a pump, characterized in that, after the reset operation of the level sensor reset unit, if the level sensor fault judgment unit determines that the level sensor is normal, the level sensor fault notification unit releases the alarm and display, and conversely, if the level sensor fault judgment unit determines that the level sensor is still faulty, the level sensor fault notification unit generates the alarm and display again.
In paragraph 1, The above level sensor unit further includes an auxiliary level sensor that is provided at the same height as the fourth level sensor and generates a fifth operation signal, and The above level sensor test unit tests the above auxiliary level sensor together with the above fourth level sensor, and A level sensor monitoring system for a pump, characterized in that the level sensor fault determination unit compares the fifth operation signal when determining whether the fourth operation signal occurs normally.
In Paragraph 10, A pump level sensor monitoring system characterized by the pump control unit blocking the reception of the fourth operation signal and initiating the reception of the fifth operation signal when the fourth level sensor is determined to be faulty.

Description

Level Sensor Monitoring System for Pumps The present invention relates to a level sensor monitoring system, and more specifically, to a level sensor monitoring system for a pump for monitoring the status of a level sensor installed together with a pump in a water tank such as a drainage facility and diagnosing a fault. Generally, drainage facilities refer to drainage pipes, catch basins, and other equipment necessary to channel sewage into the public sewer system. Drainage facilities consist of pipes, pumping stations, and treatment facilities; the purpose of installing the sewer system is achieved by fully equipping these facilities to allow sewage from households and other sources to flow into the sewer system without delay. Although the Sewerage Act includes rainwater, the reason for installing drainage facilities excluding rainwater—specifically drainage tanks and pumps—is that when using water and discharging sewage in buildings such as apartments and office buildings, if the height of the discharge point is lower than the public sewer pipe, discharge via gravity without separate facilities becomes difficult. In other words, to improve the usability of space, underground spaces in buildings are utilized for residential or office purposes, and a sewage discharge device for underground spaces is separately installed to discharge sewage generated in these underground spaces into sewer pipes. The sewage discharge device for underground spaces is installed at a lower position than the building's underground space to collect sewage generated in the underground space, and the collected sewage is combined with sewage generated in the building's above-ground space and transported to a sewage purification facility. Therefore, since sewage discharge devices in underground spaces must be equipped with pumps to transport sewage, the most widely used drainage pump system includes a tank for temporarily storing sewage discharged from restrooms, restaurants, etc., and a drainage pump installed inside the tank to discharge the incoming sewage into septic tanks, sewers, etc. Conventional drainage pump systems include a level sensor that measures the water level of sewage flowing into a tank, and the drainage pump is operated according to the water level of the sewage measured by the level sensor, and multiple drainage pumps are used to increase the efficiency of sewage transfer. In the case of level sensors, multiple float-type level sensors are used that are formed to float by buoyancy and operate by rotating motion according to the water level, but there are problems such as failures occurring where the operation signal is continuously generated regardless of the water level or not generated at all due to short circuits or open circuits, and there is a problem that it is very difficult for the manager to inspect them every time because they are installed inside the water tank. FIG. 1 is a block diagram showing a level sensor monitoring system for a pump according to a first embodiment of the present invention. FIG. 2 is a drawing showing a level sensor unit according to a first embodiment of the present invention. FIG. 3 is a drawing showing a level sensor test section according to a first embodiment of the present invention. FIG. 4 is a block diagram showing a level sensor monitoring system for a pump according to a second embodiment of the present invention. FIG. 5 is a drawing showing a level sensor unit according to a third embodiment of the present invention. Specific details regarding the problem to be solved, the means for solving the problem, and the effects of the invention as described above are included in the embodiments and drawings to be described below. The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described in detail below in conjunction with the accompanying drawings. Hereinafter, the present invention will be described in more detail with reference to the attached drawings. FIG. 1 is a block diagram showing a level sensor monitoring system for a pump according to a first embodiment of the present invention. As illustrated in FIG. 1, a level sensor monitoring system for a pump according to the first embodiment of the present invention includes a pump unit (110), a pump control unit (120), a level sensor unit (130), a level sensor test unit (140), a level sensor fault determination unit (150), and a level sensor fault notification unit (160). The pump unit (110) includes a first pump and a second pump installed together in a single tank. In a drainage facility, the tank functions to collect and temporarily store sewage. The tank may be made of a cement structure or manufactured in the form of a water tank made of plastic or metal. The first pump and the second pump are installed to discharge sewage from the tank, and multiple pumps operate complementarily to ensure at least minimal drainage operation even if o