CN223203217U - An online monitoring system for the operation status of micro pumping stations based on the Internet of Things - Google Patents
An online monitoring system for the operation status of micro pumping stations based on the Internet of ThingsInfo
- Publication number
- CN223203217U CN223203217U CN202421811062.6U CN202421811062U CN223203217U CN 223203217 U CN223203217 U CN 223203217U CN 202421811062 U CN202421811062 U CN 202421811062U CN 223203217 U CN223203217 U CN 223203217U
- Authority
- CN
- China
- Prior art keywords
- pump
- water pump
- water
- module
- internet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
本申请公开了一种基于物联网的微型泵站运行状态在线监测系统，包括水泵、信号收集模块、数据上传模块、泵井运行监测平台、终端设备，其中，所述信号收集模块用于实时监测和收集水泵运行辅助参数，包括压力传感器、水位传感器、电流传感器，所述压力传感器设置于水泵的出水管；所述水位传感器设置于溢流口以下；所述电流传感器电性连接水泵电机。本申请以水泵运行辅助参数、泵池的关键点水位变化等为要素，通过工业物联网系统收集、上传、分析得到泵井整体的运行状态，且传感器主要收集水泵的出水管压力，可适应所有水泵型号。
This application discloses an online monitoring system for the operating status of a micro-pump station based on the Internet of Things (IoT). The system includes a water pump, a signal collection module, a data upload module, a pump well operation monitoring platform, and terminal equipment. The signal collection module is used to monitor and collect auxiliary parameters of the water pump operation in real time. The system includes a pressure sensor, a water level sensor, and a current sensor. The pressure sensor is located in the water pump's outlet pipe; the water level sensor is located below the overflow port; and the current sensor is electrically connected to the water pump motor. This application uses auxiliary parameters of the water pump operation and changes in water levels at key points in the pump pool as elements. Through the industrial IoT system, the system collects, uploads, and analyzes data to obtain the overall operating status of the pump well. The sensor primarily collects the pressure of the water pump's outlet pipe and is adaptable to all water pump models.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to an online monitoring system for the running state of a miniature pump station based on the Internet of things.
Background
Along with the acceleration of the urban process, the sewage treatment demand is rapidly increased, and a pump station is used as a key infrastructure, and the running state of the pump station is directly related to the sewage treatment efficiency and the environmental safety. Currently, a common real-time monitoring technology for the running state of a sewage pump generally relies on collection and analysis of relevant running parameters of the water pump, and various parameters are acquired by installing various sensors on the water pump and transmitted to a terminal for processing and analysis.
However, there are differences in structure and function due to the different models of water pumps. Therefore, each model of water pump is required to be provided with a specific type of sensor, and each time a water pump device is added, a monitoring system needs to be specially developed and debugged once, so that the adaptability is poor, the replicability is weak, the existing monitoring technology usually focuses on the running condition of the water pump, but the whole running condition of a pump well is ignored, for example, important factors such as the water level change in the pump well cannot be effectively monitored and analyzed, the running condition of a pump station cannot be comprehensively reflected by the local monitoring visual angle, and potential problems can be ignored, so that the normal running and sewage treatment effect of the pump station are influenced.
Disclosure of Invention
Aiming at the problems, the application provides an on-line monitoring system for the running state of a miniature pump station based on the Internet of things, which takes auxiliary parameters of the running of a water pump, the change of the water level of key points of a pump pool and the like as elements, and obtains the integral running state of a pump well through collection, uploading and analysis of an industrial Internet of things system, and a sensor mainly collects the pressure of a water outlet pipe of the water pump, so that the on-line monitoring system can adapt to all water pump models.
In order to achieve the purpose of the application, the application provides the following technical scheme:
An on-line monitoring system for the running state of a miniature pump station based on the Internet of things comprises a water pump, a signal collection module, a data uploading module, a pump well running monitoring platform and terminal equipment,
The signal collection module is used for monitoring and collecting operation auxiliary parameters of the water pump in real time and comprises a pressure sensor, a water level sensor and a current sensor, wherein the pressure sensor is arranged on a water outlet pipe of the water pump and used for monitoring the change of water pressure of the water outlet pipe;
The data uploading module is used for receiving the real-time operation auxiliary parameters of the water pump collected by the signal collecting module and sending the parameters to a designated server;
The server is used for receiving and processing the water pump operation auxiliary parameters sent by the data uploading module and forwarding the water pump operation auxiliary parameters to a pump well operation monitoring platform;
The pump well operation monitoring platform is used for receiving and displaying the auxiliary operation parameters and the state of the water pump in real time;
The terminal equipment is in communication connection with the pump well operation monitoring platform and is used for receiving the pump well operation auxiliary parameters and the pump station operation state sent by the pump well operation monitoring platform.
In one possible implementation, the signal collection module further comprises a water logging detector, a mains power failure alarm, wherein,
The water immersion detector is used for sending out an alarm signal when the water level exceeds the warning water level and overflows.
The mains supply outage alarm is used for sending out an alarm signal when mains supply outage occurs.
In one possible implementation manner, the pump well operation monitoring platform further comprises a data analysis module, wherein the data analysis module is used for automatically identifying and positioning a fault source in a pump station according to the pump operation auxiliary parameters collected in real time and combining with a preset fault diagnosis rule base, and sending an alarm signal.
In one possible implementation, the fault diagnosis rule base comprises a first diagnosis unit for analyzing the operation state of the water pump, wherein the first diagnosis unit is used for at least one of water pump faults, serious blockage of the water pump, abnormal water pump current and frequent start and stop of the water pump.
In one possible implementation manner, the fault diagnosis rule base further comprises a second diagnosis unit, which is used for analyzing the operation state of the water level and comprises at least one condition of jacking and overflowing.
In one possible implementation manner, the pump well operation monitoring platform further comprises an alarm module, and the alarm module is used for monitoring and alarming according to the alarm signal sent by the data analysis module.
In one possible implementation, the pump well operation monitoring platform further comprises a display module for displaying the pump operation auxiliary parameters and the alarm notification received from the data analysis module and the alarm module in real time.
In one possible implementation, the terminal device is a smart-hand tablet computer or a personal computer.
In one possible implementation, the data upload module is an industrial internet of things gateway, including one or more combinations of short range communication devices, NB-IoT modules, loRa modules, 4G modules, or 5G modules.
The beneficial effects are that:
The online monitoring system for the running state of the miniature pump station based on the Internet of things provided by the application effectively solves the problem that different types of sensors are required to be matched with different types of water pumps, can monitor the overall running state of a pump well in real time, remotely manages, intelligently analyzes and efficiently early warns, and remarkably improves the running safety, reliability and economy of the miniature pump station.
Drawings
The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate the application and together with the embodiments of the application, do not limit the application;
fig. 1 is a schematic flow chart of the online monitoring system for the running state of the micro pump station based on the internet of things.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature, and in the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow diagram of an online monitoring system for the running state of a micro pump station based on the internet of things, and the embodiment of the application provides an online monitoring system for the running state of the micro pump station based on the internet of things, which comprises a water pump, a signal collecting module, a data uploading module, a pump well running monitoring platform and terminal equipment;
The signal collection module comprises a pressure sensor, a water level sensor and a current sensor and is used for monitoring and collecting operation auxiliary parameters of the water pump in real time;
The pressure sensor is arranged on the water outlet pipe of the water pump and is used for monitoring the change of the water pressure of the water outlet pipe and judging the conditions of starting and stopping the water pump and jacking the water outlet.
Specifically, after sewage flows through the water pump, the pressure of the sewage flowing through the water outlet pipe of the water pump can reflect the output capacity and system resistance of the water pump and can represent the pressure condition of the water pump output end, and the lift of different water pumps is usually within 20 meters, so that the pressure to be monitored is not large, and the pressure sensor is arranged at the position to adapt to the configuration of different water pumps and systems without customizing for each specific model.
Furthermore, the pump well monitoring platform presets an alarm threshold value, the pressure sensor monitors the change of the water pressure of the water outlet pipe in real time, if the water pressure is lower than a lower limit value set by the monitoring platform, the pump may not fully operate or the pipeline leaks, and if the water pressure is abnormally increased, the downstream pipeline is blocked or the valve is improperly closed. The pressure of the water outlet is abnormally increased, jacking can occur, and personnel need to take measures such as closing and stopping a pump, increasing the output power of the pump or finding and clearing blockage according to real-time monitoring results so as to ensure the normal operation and efficiency of a pump station.
In one possible embodiment, the water level sensor is arranged below the overflow port and is used for monitoring the water level change and controlling the start and stop of the water pump according to the water level change.
Specifically, when the water level sensor detects that the water level reaches the preset starting water level (usually slightly lower than the overflow port to ensure that enough water is pumped by the pump), the water level sensor sends a signal, a person starts the water pump to start pumping operation, and when the water level drops to another preset stopping water level (lower than the starting water level to avoid frequent starting and stopping) along with the running of the water pump, the water level sensor sends a signal again, and the person stops the running of the water pump to avoid the dry rotation of the water pump or the waste of energy. The water pump is started when the water level is close to the overflow port by monitoring the water level, so that water body overflow can be effectively prevented, water loss and possible structural damage are avoided, and when the water level is too low, the water pump is stopped, so that the water pump can be prevented from running in a water-free state, overheat or damage of the water pump is avoided, and meanwhile, waste of water resources is also prevented.
Optionally, the water level sensor is a floating ball type water level sensor, and detects and measures the water level by using the principle that a floating ball rises and falls along with the change of the liquid level. When the water level rises, the floating ball rises along with the rise of the water level, and when the water level falls, the floating ball falls along with the fall of the water level. The floating ball transmits the position change through mechanical or magnetic connection, so as to trigger a switch or a sensor to generate an electric signal for indicating the water level.
In one possible embodiment, the current sensor is electrically connected to the water pump motor for detecting the water pump wiring current.
Specifically, the current sensor can judge the running state of the water pump and whether the condition of electricity theft exists. Under normal operating conditions, the current level should stabilize within a certain range, and if the current is abnormal, such as suddenly increased or fluctuated, this indicates that the water pump is overloaded, blocked, bearing worn out, or electrical failure, the maintenance personnel can respond quickly. When additional loads are not authorized to access the grid, the current sensor may detect an abnormal increase in current or a change in pattern. By setting an alarm threshold value on the pump well monitoring platform, when abnormal current is detected, an alarm is triggered, so that a manager is prompted that electricity stealing behaviors possibly exist, and necessary legal or safety measures are taken.
Optionally, the water pump motor is a three-phase asynchronous motor, the current sensor is used for carrying out three-phase current testing and protection, residual phase current is too high due to phase failure, overheating and damage of the motor are caused, the motor is reversed or unstable in operation due to phase sequence errors, the current sensor continuously detects the three-phase current, and once an error is found, a protection mechanism is triggered, a power supply is cut off or an alarm is given, and damage or system failure of the motor is prevented.
In a possible implementation manner, the data uploading module is used for receiving the real-time operation auxiliary parameters of the water pump collected by the signal collecting module and sending the real-time operation auxiliary parameters to a designated server;
The server is used for receiving and processing the water pump operation auxiliary parameters sent by the data uploading module and forwarding the water pump operation auxiliary parameters to a pump well operation monitoring platform;
Specifically, the server performs preliminary processing on the data, including data cleaning, data conversion and data storage.
Optionally, the server is one of a cloud server or a local server.
In one possible implementation manner, the pump well operation monitoring platform is used for receiving and displaying the pump operation auxiliary parameters in real time;
In one possible implementation manner, the terminal device is in communication connection with the pump well operation monitoring platform and is used for receiving the pump operation auxiliary parameters and the pump station operation state sent by the pump well operation monitoring platform.
In one possible implementation, the signal collection module further comprises a water logging detector and a mains power failure alarm.
The water immersion detector is used for sending out an alarm signal when the water level exceeds the warning water level and overflows.
In particular, if the water level rises rapidly due to excessive rainfall, pipe breakage or other reasons, the water logging detector can detect this change in time and alarm a signal before the water level reaches a level that may cause overflow.
The mains supply outage alarm is used for sending an alarm signal when mains supply outage occurs.
Specifically, the utility power outage alarm monitors the state of a power supply circuit in real time, immediately sends an alarm signal once the utility power outage is detected, and is switched to a standby power supply, so that the basic functions of the pump station are kept to run continuously.
Alternatively, the power down alarm is typically battery powered to ensure proper operation in the event of a failure of the primary power source.
In one possible implementation manner, the pump well operation monitoring platform further comprises a data analysis module, wherein the data analysis module is used for automatically identifying and positioning a fault source in a pump station according to the pump operation auxiliary parameters collected in real time and combining with a preset fault diagnosis rule base, and sending out an alarm signal.
In one possible implementation, the fault diagnosis rule base comprises a first diagnosis unit for analyzing the operation state of the water pump, including at least one of water pump fault, serious water pump blockage, water pump current abnormality, frequent water pump start-up and shut-down, in particular,
(1) The water pump fault is judged according to the water level signal indicated by the high-level float switch and the low-level float switch, and meanwhile, the running current of the water pump and the water pressure of the water outlet pipe are the lowest values.
(2) The water pump is seriously blocked, and the judgment basis is that the running current of the water pump is abnormally large and the water pressure of the water outlet pipe is abnormally small.
(3) The current of the water pump is abnormal, and the judgment basis is that the three-phase current difference of the same water pump exceeds 10% in the normal value range.
(4) The water pump is started and stopped frequently, and the judgment basis is that 6 times or more repeated starting and stopping occur within one hour (the size of a tank body and the change of the incoming water quantity also need to be considered for an individual pump pit).
In a possible implementation manner, the fault diagnosis rule base further comprises a second diagnosis unit for analyzing the operation state of the water level, including at least one of jacking, overflowing, in particular,
(1) The jacking is carried out according to the judgment that the current of the water pump is normal and the water pressure of the water outlet pipe is abnormally high.
(2) And (5) overflow alarm, wherein the judgment basis is a signal sent by the water immersion detector.
Specifically, the data analysis module receives the auxiliary operation parameters of the water pump from the server, and forwards the parameters collected by the pressure sensor and the current sensor to the first diagnosis unit, and forwards the parameters collected by the water level sensor to the second diagnosis unit.
In one possible implementation manner, the pump well operation monitoring platform further comprises an alarm module, and the alarm module is used for monitoring and alarming according to the alarm signal sent by the data analysis module.
Optionally, the pump well operation monitoring platform presets alarm thresholds of various parameters such as pressure, current, water level and the like, is used for monitoring the operation state of the water pump in real time, and triggering an alarm when the monitored operation auxiliary parameters of the water pump exceed the normal range, so that the safety and stability of operation of the pump station are ensured.
In one possible implementation, the pump well operation monitoring platform further comprises a display module for displaying the pump operation auxiliary parameters and the alarm notification received from the data analysis module and the alarm module in real time.
Specifically, the display module is a main interface for interaction between a user and the monitoring platform and is used for displaying the operation auxiliary parameters, the operation state information and the alarm notification of the water pump of the pump station in real time.
Optionally, the display module graphically presents the auxiliary parameters of water pump operation and alarm notifications, such as instrument panels, trend graphs, alarm lists, and the like.
In one possible implementation mode, the terminal equipment is in communication connection with the pump well operation monitoring platform, and a user can remotely check the operation state of the pump station and receive alarm information.
In one possible implementation, the terminal device is a smart phone, a tablet or a personal computer.
The pump well operation monitoring platform can automatically trigger an alarm when the pump station operation parameters exceed a preset normal range or a potential fault condition is monitored, and sends alarm information to the terminal equipment in a pushing notification, short message, email or telephone mode, etc., so that the user can immediately know the abnormal condition of the pump station, take countermeasures in time and avoid or reduce possible damage.
In one possible implementation, the data upload module is an industrial internet of things gateway, including one or more combinations of short range communication devices, NB-IoT modules, loRa modules, 4G modules, or 5G modules.
In one possible implementation, the data uploading module and the pump well operation monitoring platform adopt an encrypted communication protocol for data transmission, and the platform has data access log recording and auditing functions.
The beneficial effects of the embodiment of the application are as follows:
The on-line monitoring system for the running state of the miniature pump station based on the Internet of things mainly collects the water outlet pipe pressure of the water pump at the main water outlet pipe sensor, can adapt to all the types of the water pump, is not required to be specially customized, has low cost for field installation, can be copied in a large quantity, integrates a series of high-performance sensors including a pressure sensor, a water level sensor, a current sensor and the like, can monitor the running state of the pump station in an omnibearing and multidimensional manner, is not only limited to monitoring of a single parameter, but also forms a monitoring network covering main running indexes of the pump station, ensures accurate grasp of the whole health condition of the pump station, supports remote monitoring by means of the Internet of things technology, and can acquire the running state of the pump station in real time by terminal equipment and receive alarm information, so that the operation and maintenance work of the pump station is more efficient and convenient.
In the several embodiments provided herein, it should be understood that the disclosed systems, modules, and methods may be implemented in other manners. For example, the above-described module embodiments are merely illustrative, e.g., the division of units is merely a logical function division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via interfaces, modules or units, which may be in electrical, mechanical or other forms.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting. The application is not limited to the exact construction described above and illustrated in the accompanying drawings, and the practice of the application is not to be considered limited to these descriptions. Various changes and modifications may be made by one of ordinary skill in the art without departing from the spirit of the application, and the application is deemed to fall within the scope of protection.
Claims (9)
1. An on-line monitoring system for the running state of a miniature pump station based on the Internet of things is characterized by comprising a water pump, a signal collection module, a data uploading module, a pump well running monitoring platform and terminal equipment, wherein,
The signal collection module is used for monitoring and collecting operation auxiliary parameters of the water pump in real time and comprises a pressure sensor, a water level sensor and a current sensor, wherein the pressure sensor is arranged on a water outlet pipe of the water pump;
The data uploading module is used for receiving the real-time water pump operation auxiliary parameters collected by the signal collecting module and sending the real-time water pump operation auxiliary parameters to the appointed server;
The server is used for receiving and processing the water pump operation auxiliary parameters sent by the data uploading module and forwarding the water pump operation auxiliary parameters to a pump well operation monitoring platform;
the pump well operation monitoring platform is used for receiving and displaying the auxiliary operation parameters of the water pump in real time;
The terminal equipment is in communication connection with the pump well operation monitoring platform and is used for receiving the pump well operation auxiliary parameters and the pump station operation state sent by the pump well operation monitoring platform.
2. The online monitoring system of the running state of the micro pump station based on the Internet of things according to claim 1, wherein the signal collecting module further comprises a water immersion detector and a mains supply cut-off alarm, wherein,
The water immersion detector is used for sending out an alarm signal when the water level exceeds the warning water level and overflows;
the mains supply outage alarm is used for sending out an alarm signal when mains supply outage occurs.
3. The online monitoring system of the running state of the micro pump station based on the Internet of things according to claim 1, wherein the pump well running monitoring platform further comprises a data analysis module, wherein the data analysis module is used for automatically identifying and positioning a fault source in the pump station according to the auxiliary running parameters of the water pump received from the server in combination with a preset fault diagnosis rule base and sending an alarm signal.
4. The online monitoring system for the running state of the micro pump station based on the Internet of things according to claim 3, wherein the fault diagnosis rule base comprises a first diagnosis unit, and the first diagnosis unit is used for analyzing the running state of the water pump and comprises at least one condition of water pump fault, serious water pump blockage, water pump current abnormality and frequent water pump start and stop.
5. The online monitoring system for the running state of the micro pump station based on the Internet of things according to claim 4, wherein the fault diagnosis rule base further comprises a second diagnosis unit, and the second diagnosis unit is used for analyzing the running state of the water level and comprises at least one condition of jacking and overflowing.
6. The online monitoring system of the running state of the micro pump station based on the Internet of things according to claim 1, wherein the pump well running monitoring platform further comprises an alarm module for monitoring and alarming according to an alarm signal sent by the data analysis module.
7. The online monitoring system of the running state of the micro pump station based on the internet of things according to claim 1, wherein the pump well running monitoring platform further comprises a display module for displaying the auxiliary running parameters of the water pump and the alarm notification received from the data analysis module and the alarm module in real time.
8. The online monitoring system for the running state of the micro pump station based on the Internet of things according to claim 1, wherein the terminal equipment is a smart phone, a tablet or a personal computer.
9. The internet of things-based micro pump station operation state online monitoring system of claim 1, wherein the data uploading module is an industrial internet of things gateway and comprises one or more of a short-range communication device, an NB-IoT module, a LoRa module, a 4G module or a 5G module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421811062.6U CN223203217U (en) | 2024-07-29 | 2024-07-29 | An online monitoring system for the operation status of micro pumping stations based on the Internet of Things |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421811062.6U CN223203217U (en) | 2024-07-29 | 2024-07-29 | An online monitoring system for the operation status of micro pumping stations based on the Internet of Things |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN223203217U true CN223203217U (en) | 2025-08-08 |
Family
ID=96599082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421811062.6U Active CN223203217U (en) | 2024-07-29 | 2024-07-29 | An online monitoring system for the operation status of micro pumping stations based on the Internet of Things |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN223203217U (en) |
-
2024
- 2024-07-29 CN CN202421811062.6U patent/CN223203217U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6721683B2 (en) | Pump motor diagnosis | |
| CN207570596U (en) | Mine pump monitoring device | |
| CN108194339B (en) | Water pump intelligent control system with fault self-checking function | |
| CN110830943A (en) | Equipment state monitoring system based on edge calculation and big data analysis | |
| CN110045719B (en) | Remote fault diagnosis method | |
| KR102208830B1 (en) | Apparatus and method for monitoring of motor pump | |
| CN107687332A (en) | Screw pump and working conditions of oil extractor on-line analysis diagnosis and control method of adjustment and device are realized using electrical parameter | |
| Nation et al. | Nonintrusive monitoring for shipboard fault detection | |
| CN110837045A (en) | A method and detection system for diagnosing potential faults of a pump system | |
| CN117722337A (en) | Water level monitoring system, method, medium and equipment for drainage of water collecting well of hydropower station | |
| CN223203217U (en) | An online monitoring system for the operation status of micro pumping stations based on the Internet of Things | |
| CN112506121A (en) | Submersible electric pump intelligent monitoring system based on Internet of things | |
| KR100567434B1 (en) | On-line monitoring system for rainwater pumping station | |
| KR101358727B1 (en) | System for managing underground facilities | |
| CN113885595A (en) | Transformer substation sump pit monitoring control system | |
| CN209803615U (en) | leakage detection relay for submersible pump | |
| CN118911243A (en) | Flood prevention and drainage system for reclaimed water output pump house and early warning method thereof | |
| CN117872834A (en) | Pumped storage power station unit state monitoring system and method | |
| CN217027354U (en) | Building sewage pump control system | |
| CN117640706A (en) | Intelligent monitoring system and method for hydraulic lubrication system | |
| CN103486056A (en) | Submersible sewage pump monitoring device | |
| CN108799078A (en) | A kind of construction site violation operation warning device and its application method | |
| CN209370099U (en) | Intelligent submersible pump | |
| CN116180859B (en) | Substation drainage device | |
| CN223283731U (en) | Sewage discharge and metering equipment monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |