CN-122014583-A - Double-submersible pump water pumping device based on water level sensing

CN122014583ACN 122014583 ACN122014583 ACN 122014583ACN-122014583-A

Abstract

The invention relates to a double-submersible pump water pumping device based on water level sensing, which belongs to the technical field of water drainage control and comprises an actuating mechanism, a pneumatic water level detection unit and a control module, wherein the actuating mechanism consists of a high-level water pump, a low-level water pump and an alternating-current contactor, the pneumatic water level detection unit comprises bell-shaped shells which are respectively arranged in a high level and a low level of a water tank, the openings of the bell-shaped shells are downward and are communicated with corresponding inner cavities of a sealed water level switch through hollow pipes, and the control module judges the water level height and the water level change rate according to signals output by the water level detection unit and controls the start-stop combination of the high-level water pump and the low-level water pump so as to realize single-pump operation or double-pump simultaneous operation. According to the invention, the pneumatic water level detection units are respectively arranged at the high position and the low position of the water tank, the water level change is monitored in real time, and the water level change rate judgment module is introduced, so that the start-stop combination of the high-low water pump is intelligently controlled. And the system is provided with a delay starting and abnormality alarming function, so that the response speed, the drainage efficiency and the reliability of the system are improved.

Inventors

LI TAO
LIU TING
CHENG YONGSONG
XIA BOWEN
LIU LIN
ZHANG ZHONGYU
Wan Zidong

Assignees

遵义市贵绳物流有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260206

Claims (8)

1. The double-submersible pump water pumping device based on water level sensing comprises an actuating mechanism, a pneumatic water level detection unit and a control module, wherein the actuating mechanism consists of a high-level water pump, a low-level water pump and an alternating current contactor, and is characterized in that: the pneumatic water level detection unit comprises bell-shaped shells which are respectively arranged in a high position and a low position of the water tank, the openings of the bell-shaped shells are downward, and the bell-shaped shells are communicated with the inner cavities of the corresponding sealed water level switches through hollow pipes; the control module judges the water level height and the water level change rate according to the signal output by the water level detection unit, controls the start-stop combination of the high-level water pump and the low-level water pump, and realizes single-pump operation or double-pump simultaneous operation.
2. The dual submersible pump pumping device based on water level sensing as defined in claim 1, wherein: the bell-shaped shell in the high position of the pool is arranged below the highest water level by 50 percent 200 Mm; the bell-shaped shell in the low position of the pool is arranged above the lowest position of the water pumping pipe by 30 80 Mm.
3. The dual submersible pump pumping device based on water level sensing as defined in claim 1, wherein: The control module comprises a water level change rate judging unit which is used for judging whether to start a double-pump operation mode according to the time change rate of the water level detection signal.
4. A dual submersible pump water pumping device based on water level sensing as defined in claim 3, wherein: when the water level change rate exceeds a set threshold value, the control module starts the high-level water pump and the low-level water pump simultaneously; when the water level change rate is lower than the set threshold, only the low-level water pump is started.
5. The dual submersible pump pumping device based on water level sensing as recited in claim 1, further comprising a delay starting module for delaying starting of the high-order water pump after the water level reaches a starting threshold value, so as to avoid frequent starting and stopping.
6. The dual submersible pump pumping device based on water level sensing as defined in claim 1, wherein: The bell-shaped shell is hemispherical, cylindrical or square, and a hollow flange is arranged at the top of the bell-shaped shell and is used for connecting the hollow pipe.
7. The dual submersible pump pumping device of claim 1, further comprising a manual/automatic switch for switching to a manual control mode in the event of an automatic control failure.
8. The dual-submersible pump water pumping device based on water level sensing as set forth in claim 1, wherein the dual-submersible pump water pumping device based on water level sensing is further provided with a water level abnormality alarm module for triggering an audible and visual alarm when the water level continuously rises above a safe water level.

Description

Double-submersible pump water pumping device based on water level sensing Technical Field The invention relates to the technical field of drainage control, in particular to a double-submersible pump water pumping device based on water level sensing, which is particularly suitable for occasions where water level changes severely and efficient drainage is needed. Background At present, the drainage of underground water pits is controlled by adopting a single water pump and a float switch or an electrode type water level detection device. The system has simple structure, but when the water level rises rapidly, the single pump has insufficient drainage capacity, and accumulated water is easy to overflow. Although some double-pump systems can operate simultaneously, the lack of a mechanism for intelligently adjusting the pump set operation strategy according to the water level change often causes energy waste or response lag. In addition, conventional electrode-type detection devices are susceptible to water quality, producing fouling, and causing control failure. Disclosure of Invention The invention aims to solve the problems of insufficient single pump drainage capability, single double pump control strategy, easy failure of water level detection and the like in the prior art, and provides a double-submersible-pump water pumping device based on water level sensing. In order to solve the problems, the invention provides a double-submersible pump pumping device based on water level sensing, which comprises an actuating mechanism consisting of a high-level water pump, a low-level water pump and an alternating current contactor, a pneumatic water level detection unit and a control module; the pneumatic water level detection unit comprises bell-shaped shells which are respectively arranged in a high position and a low position of the water tank, the openings of the bell-shaped shells are downward, and the bell-shaped shells are communicated with the inner cavities of the corresponding sealed water level switches through hollow pipes; the control module judges the water level height and the water level change rate according to the signal output by the water level detection unit, controls the start-stop combination of the high-level water pump and the low-level water pump, and realizes single-pump operation or double-pump simultaneous operation. Further, the bell-shaped shell in the high position of the pool is arranged below the highest water level by 50 percent200 Mm; the bell-shaped shell in the low position of the pool is arranged above the lowest position of the water pumping pipe by 30 80 Mm. Further, the control module comprises a water level change rate judging unit for judging whether to start the double-pump operation mode according to the time change rate of the water level detection signal. Further, when the water level change rate exceeds a set threshold, the control module simultaneously starts the high-level water pump and the low-level water pump; when the water level change rate is lower than the set threshold, only the low-level water pump is started. Further, the water level control device also comprises a delay starting module which is used for delaying starting of the high-level water pump after the water level reaches a starting threshold value, so that frequent starting and stopping are avoided. Further, the bell-shaped shell is hemispherical, cylindrical or square, and a hollow flange is arranged at the top of the bell-shaped shell and is used for connecting the hollow pipe. Further, the double-submersible pump pumping device based on water level sensing further comprises a manual/automatic change-over switch for switching to a manual control mode when automatic control fails. Further, the double-submersible pump water pumping device based on water level sensing is also provided with a water level abnormality alarm module, and when the water level continuously rises to exceed the safe water level, an audible and visual alarm is triggered. The working principle of the pneumatic water level detection unit in the scheme is based on Pascal law and a communicating vessel principle, the water level is indirectly and non-contactingly measured by detecting the static pressure change of the closed air column, and the working process is a complete physical quantity conversion-transmission-action chain. The core is a communication gas circuit system formed by a bell-shaped cavity and a sealed water level switch through a hollow pipeline. The bell-shaped cavity is fixedly arranged near a water level line to be measured of the water tank, its opening is immersed vertically downward in water. The cavity is filled with air and is communicated with the inner cavity of a sealed water level switch arranged in a dry environment through a sealed hollow pipeline, so that a completely sealed air pressure transmission system is formed. When the water level of the pool is lower than the opening of the cavity of the