Water pump state monitoring system

Abstract

A water pump state monitoring system comprises an in-pump electronic module, an out-pump electronic module and a water pump monitoring unit. The in-pump electronic module is arranged in the water pump and used for changing serial input of signals of a plurality of sensors in the water pump into parallel input, receiving MODBUS signals of the vibration sensors at the same time, modulating carrier waves of the MODBUS signals and the sensor signals to a power supply cable and transmitting the MODBUS signals and the sensor signals to the out-pump electronic module; after the received water pump signal is demodulated, the out-pump electronic module transmits the signal to the water pump monitoring unit in a bus mode; and the water pump monitoring unit is used for transmitting the temperature signal, the vibration signal and the leakage signal to the PLC or the SCADA system. On the basis of the prior art, the vibration sensor module is additionally arranged in the submersible centrifugal pump, the electronic module in the pump is additionally arranged, multi-sensor signals in the water pump are collected and transmitted, signal carriers are modulated and output to the ground, signal and power supply transmission is completed by means of a cable with two cores, and wire harnesses are prevented from being increased.

Description

Technical Field

[0001] The utility model belongs to the field of water pumps, and in particular relates to a water pump state monitoring system. Background Art

[0002] The water pump in the water plant is the core equipment and key equipment in the water treatment process.

[0003] Planned maintenance is also increasingly valued by water plants. Compared with dry equipment, the operating environment and operating conditions of submersible pumps are also relatively harsh.

[0004] Most high-end water pumps in the market now include monitoring sensors (temperature monitoring, vibration monitoring, leakage monitoring, etc.). For example, some high-end foreign brands of submersible centrifugal pumps have built-in temperature thermistors, stator chamber leakage sensors, and oil chamber leakage sensors. At present, it is difficult to deploy many sensors into submersible pumps. First, the internal space is small; second, the cables are often power cables + signal cables, and signal cables are usually not abundant. If new cables are added, water pump waterproofing, cable costs and construction are all big problems and risks; third, the paired protector is from the original water pump factory, and it is difficult for a third party to replace and replace it. Fourth, the cost of multi-core cables is also very high. It is not realistic to replace the cable if the number of communication cable cores is increased for each additional sensor. At the same time, waterproofing is also a key point. If it is not handled properly, it will leak and cause equipment damage.

[0005] In summary, the technical problems that the utility model needs to solve are: how to design a water pump status monitoring system to overcome the transmission problem of multi-sensor signals; the risk and cost of replacing cables; and at the same time, the compatibility and scalability of the original protector must also be considered. Summary of the invention

[0006] The technical problem to be solved by the utility model is to provide a water pump status monitoring system. On the basis of the existing technology, the utility model adds a vibration sensor module, which is built into the submersible centrifugal pump, and an electronic module is added inside the pump to collect and transmit the multi-sensor signals inside the water pump, modulate these signal carriers and output them to the ground, and use a 2-core cable to complete the signal and power supply transmission, thereby avoiding the addition of wiring harnesses.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A water pump state monitoring system comprises an electronic module inside the pump, an electronic module outside the pump and a water pump monitoring unit;

[0009] Electronic module inside the pump: It is set inside the water pump and is used to change the serial input of multiple sensor signals inside the water pump to parallel input. It also receives the MODBUS signal of the vibration sensor, modulates the MODBUS signal and sensor signal into a carrier wave on the power supply cable and transmits it to the electronic module outside the pump.

[0010] Pump external electronic module: after demodulating the received water pump signal, transmit the signal to the water pump monitoring unit via the bus;

[0011] Water pump monitoring unit: transmits temperature signal, vibration signal and leakage signal to PLC or SCADA system.

[0012] Preferably, the sensors include a vibration sensor, a stator temperature sensor, a wiring chamber leakage sensor and an oil chamber leakage sensor.

[0013] Preferably, a dual-bus mode signal transmission is adopted between the electronic module inside the pump and the electronic module outside the pump.

[0014] Preferably, the system further comprises a communication conversion module, and the external electronic module of the pump is connected to the water pump monitoring control cabinet via the communication conversion module.

[0015] Preferably, the water pump monitoring unit is connected to the PLC via a water pump on-site protection cabinet.

[0016] Preferably, the PLC is connected to the water plant SCADA central control system, the water plant SCADA central control system is connected to the PSMS water pump status analysis system, and the PSMS water pump status analysis system is connected to the water pump monitoring control cabinet.

[0017] The utility model can achieve the following beneficial effects:

[0018] 1. The utility model adds a vibration sensor module based on the existing technology and builds it into the submersible centrifugal pump. An electronic module is added inside the pump to collect and transmit the multi-sensor signals inside the pump. These signal carriers are modulated and output to the ground, and the signal and power supply transmission are completed with the help of a 2-core cable, avoiding the addition of wiring harnesses.

[0019] 2. The water pump monitoring unit uses the output relay mode and MODBUS protocol mode for multiple alarm signals. The communication conversion module converts them into MODBUS TCP protocol, and the analysis software performs analysis and processing after receiving the signal. This solves the transmission problem of multi-sensor signals, reduces the cost of communication cables, improves the information closure and incompleteness of the original water pump plant, better meets the customer's requirements of "monitorable, controllable and predictable", and meets the requirements of refined management and digital operation of water plants.

[0020] 3. In the prior art, different sensors are serially input, and then the fault point is confirmed by detecting the size of different currents. Alternatively, multiple sensor signals are transmitted to the ground through multi-core cables, and the fault point is determined by the ground controller. The electronic module in the pump of the utility model collects multiple signals in parallel, and each signal does not affect each other. In addition, the scalability is enhanced, and the vibration sensor can be collected by communication. In this way, the collection of sensor signals includes current type, switch type and bus type, which is richer and more complete, and easy to expand. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 This is the system connection diagram of the utility model.

[0023] In the figure: vibration sensor 1, stator temperature sensor 2, wiring room leakage sensor 3, oil chamber leakage sensor 4, submersible centrifugal pump 5, electronic module inside the pump 6, electronic module outside the pump 7, communication conversion module 8, water pump monitoring unit 9, water pump on-site protection panel cabinet 10, PLC station 11, water pump monitoring control cabinet 12. DETAILED DESCRIPTION

[0024] The application object in this embodiment is a submersible centrifugal pump. The submersible centrifugal pump is affected by its own harsh working environment and difficult monitoring. The working conditions and potential risks of the equipment have been ignored for a long time, and the risk of equipment failure and shutdown is very high. Adding multiple sensors is also restricted by factors such as internal space size and signal transmission.

[0025] The design idea of ​​this system is to change the structure of the water pump as little as possible, add a small electronic module inside the pump to realize multi-sensor signal transmission and communication, and add a vibration sensor. The specific plan is as follows:

[0026] The preferred solution is Figure 1 As shown, a water pump status monitoring system includes an electronic module inside the pump, an electronic module outside the pump and a water pump monitoring unit;

[0027] Electronic module inside the pump: It is set inside the water pump and is used to change the serial input of multiple sensor signals inside the water pump to parallel input. It also receives the MODBUS signal from the vibration sensor, modulates the MODBUS signal and sensor signal into a carrier wave on the power supply cable (two-core cable) and transmits it to the electronic module outside the pump.

[0028] Selection of electronic modules in the pump: electronic module A-1 and electronic module A-2. Electronic module A-1 is the basic type, with one set of sensor interfaces (four cores) and one set of two buses (two cores). Electronic module A-2 is complete, with one set of sensor interfaces (four cores), one set of two buses (two cores) and one set of sensor interfaces (five cores).

[0029] Pump external electronic module: after demodulating the received water pump signal, transmit the signal to the water pump monitoring unit via the bus;

[0030] Selection: The marked model PSMU-pumpB interface includes power supply 12V; a group of two bus interfaces (2 cores); a group of 485 interfaces (2 cores), and a group of 232 interfaces (3 cores).

[0031] Water pump monitoring unit: transmits temperature signal, vibration signal and leakage signal to PLC or SCADA system.

[0032] Selection: One is PSMU-X2, the basic model, with black and white display and no Ethernet interface; the other is PSMU-X4, the complete model, with a four-inch color touch screen and an Ethernet interface.

[0033] In this embodiment, the fault signal is output in the form of a relay output (which can be connected to the secondary control loop of the water pump) or the temperature signal, vibration signal, and leakage signal are transmitted to the PLC or SCADA system in the form of a MODBUS.

[0034] Specifically, the sensors include vibration sensors, stator temperature sensors, wiring room leakage sensors, and oil room leakage sensors. Two-bus mode signal transmission is adopted between the electronic module inside the pump and the electronic module outside the pump. The water pump monitoring unit is connected to the PLC through the water pump local protection panel cabinet. The PLC is connected to the water plant SCADA central control system, the water plant SCADA central control system is connected to the PSMS water pump status analysis system, and the PSMS water pump status analysis system is connected to the water pump monitoring control cabinet.

[0035] Furthermore, the system also includes a communication conversion module, and the external electronic module of the pump is connected to the water pump monitoring control cabinet through the communication conversion module.

[0036] The sensor selection in this embodiment is as follows:

[0037] Vibration sensor, model PSMU-vib, triaxial acceleration & velocity sensor, provides peak value, average value, and waveform output.

[0038] Stator temperature sensor, temperature switch (thermal switch)

[0039] Wiring room leakage sensors, including FLS, FLS10.

[0040] Oil chamber leakage sensor, CLS sensor.

[0041] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A water pump status monitoring system, characterized in that: It includes an electronic module inside the pump, an electronic module outside the pump and a water pump monitoring unit; Electronic module inside the pump: It is set inside the water pump and is used to change the serial input of multiple sensor signals inside the water pump to parallel input. It also receives the MODBUS signal of the vibration sensor, modulates the MODBUS signal and sensor signal into a carrier wave on the power supply cable and transmits it to the electronic module outside the pump. Pump external electronic module: after demodulating the received water pump signal, transmit the signal to the water pump monitoring unit via the bus; Water pump monitoring unit: transmits temperature signal, vibration signal and leakage signal to PLC or SCADA system; The sensors include vibration sensors, stator temperature sensors, wiring room leakage sensors and oil room leakage sensors; The signal transmission between the electronic module inside the pump and the electronic module outside the pump adopts the two-bus mode; It also includes a communication conversion module, through which the external electronic module of the pump is connected to the water pump monitoring control cabinet; The PLC is connected to the water plant SCADA central control system, the water plant SCADA central control system is connected to the PSMS water pump status analysis system, and the PSMS water pump status analysis system is connected to the water pump monitoring control cabinet; Selection of electronic modules in the pump: electronic module A-1 and electronic module A-2. Electronic module A-1 is the basic type, and the interface is a group of sensor interfaces, one group is a two-bus; electronic module A-2 is complete, and the interface is a group of sensor interfaces, one group is a two-bus, and one group is a sensor interface.

2. A water pump status monitoring system according to claim 1, characterized in that: The water pump monitoring unit is connected to the PLC through the water pump local protection cabinet.

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